diff options
Diffstat (limited to 'drivers/scsi')
43 files changed, 8086 insertions, 1553 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 81ccbd7f9e3..26be540d1dd 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -888,6 +888,25 @@ config SCSI_IBMVSCSIS To compile this driver as a module, choose M here: the module will be called ibmvstgt. +config SCSI_IBMVFC + tristate "IBM Virtual FC support" + depends on PPC_PSERIES && SCSI + select SCSI_FC_ATTRS + help + This is the IBM POWER Virtual FC Client + + To compile this driver as a module, choose M here: the + module will be called ibmvfc. + +config SCSI_IBMVFC_TRACE + bool "enable driver internal trace" + depends on SCSI_IBMVFC + default y + help + If you say Y here, the driver will trace all commands issued + to the adapter. Performance impact is minimal. Trace can be + dumped using /sys/class/scsi_host/hostXX/trace. + config SCSI_INITIO tristate "Initio 9100U(W) support" depends on PCI && SCSI @@ -1738,10 +1757,12 @@ config SCSI_SUNESP select SCSI_SPI_ATTRS help This is the driver for the Sun ESP SCSI host adapter. The ESP - chipset is present in most SPARC SBUS-based computers. + chipset is present in most SPARC SBUS-based computers and + supports the Emulex family of ESP SCSI chips (esp100, esp100A, + esp236, fas101, fas236) as well as the Qlogic fas366 SCSI chip. To compile this driver as a module, choose M here: the - module will be called esp. + module will be called sun_esp. config ZFCP tristate "FCP host bus adapter driver for IBM eServer zSeries" @@ -1771,4 +1792,6 @@ endif # SCSI_LOWLEVEL source "drivers/scsi/pcmcia/Kconfig" +source "drivers/scsi/device_handler/Kconfig" + endmenu diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 6c775e350c9..a8149677de2 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_SCSI_ISCSI_ATTRS) += scsi_transport_iscsi.o obj-$(CONFIG_SCSI_SAS_ATTRS) += scsi_transport_sas.o obj-$(CONFIG_SCSI_SAS_LIBSAS) += libsas/ obj-$(CONFIG_SCSI_SRP_ATTRS) += scsi_transport_srp.o +obj-$(CONFIG_SCSI_DH) += device_handler/ obj-$(CONFIG_ISCSI_TCP) += libiscsi.o iscsi_tcp.o obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o @@ -118,6 +119,7 @@ obj-$(CONFIG_SCSI_IPR) += ipr.o obj-$(CONFIG_SCSI_SRP) += libsrp.o obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/ obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/ +obj-$(CONFIG_SCSI_IBMVFC) += ibmvscsi/ obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o obj-$(CONFIG_SCSI_STEX) += stex.o obj-$(CONFIG_SCSI_MVSAS) += mvsas.o diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c index 5fd83deab36..a7355260cfc 100644 --- a/drivers/scsi/aacraid/commctrl.c +++ b/drivers/scsi/aacraid/commctrl.c @@ -41,6 +41,7 @@ #include <linux/kthread.h> #include <linux/semaphore.h> #include <asm/uaccess.h> +#include <scsi/scsi_host.h> #include "aacraid.h" @@ -581,6 +582,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { u64 addr; void* p; + if (upsg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -625,6 +634,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < usg->count; i++) { u64 addr; void* p; + if (usg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -667,6 +684,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { uintptr_t addr; void* p; + if (usg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } /* Does this really need to be GFP_DMA? */ p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA); if(!p) { @@ -698,6 +723,14 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) for (i = 0; i < upsg->count; i++) { dma_addr_t addr; void* p; + if (upsg->sg[i].count > + (dev->adapter_info.options & + AAC_OPT_NEW_COMM) ? + (dev->scsi_host_ptr->max_sectors << 9) : + 65536) { + rcode = -EINVAL; + goto cleanup; + } p = kmalloc(upsg->sg[i].count, GFP_KERNEL); if (!p) { dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n", diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index 68c140e8267..9aa301c1ed0 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -865,7 +865,7 @@ static ssize_t aac_show_bios_version(struct device *device, return len; } -ssize_t aac_show_serial_number(struct device *device, +static ssize_t aac_show_serial_number(struct device *device, struct device_attribute *attr, char *buf) { struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata; diff --git a/drivers/scsi/device_handler/Kconfig b/drivers/scsi/device_handler/Kconfig new file mode 100644 index 00000000000..2adc0f666b6 --- /dev/null +++ b/drivers/scsi/device_handler/Kconfig @@ -0,0 +1,32 @@ +# +# SCSI Device Handler configuration +# + +menuconfig SCSI_DH + tristate "SCSI Device Handlers" + depends on SCSI + default n + help + SCSI Device Handlers provide device specific support for + devices utilized in multipath configurations. Say Y here to + select support for specific hardware. + +config SCSI_DH_RDAC + tristate "LSI RDAC Device Handler" + depends on SCSI_DH + help + If you have a LSI RDAC select y. Otherwise, say N. + +config SCSI_DH_HP_SW + tristate "HP/COMPAQ MSA Device Handler" + depends on SCSI_DH + help + If you have a HP/COMPAQ MSA device that requires START_STOP to + be sent to start it and cannot upgrade the firmware then select y. + Otherwise, say N. + +config SCSI_DH_EMC + tristate "EMC CLARiiON Device Handler" + depends on SCSI_DH + help + If you have a EMC CLARiiON select y. Otherwise, say N. diff --git a/drivers/scsi/device_handler/Makefile b/drivers/scsi/device_handler/Makefile new file mode 100644 index 00000000000..35272e93b1c --- /dev/null +++ b/drivers/scsi/device_handler/Makefile @@ -0,0 +1,7 @@ +# +# SCSI Device Handler +# +obj-$(CONFIG_SCSI_DH) += scsi_dh.o +obj-$(CONFIG_SCSI_DH_RDAC) += scsi_dh_rdac.o +obj-$(CONFIG_SCSI_DH_HP_SW) += scsi_dh_hp_sw.o +obj-$(CONFIG_SCSI_DH_EMC) += scsi_dh_emc.o diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c new file mode 100644 index 00000000000..ab6c21cd968 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh.c @@ -0,0 +1,162 @@ +/* + * SCSI device handler infrastruture. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright IBM Corporation, 2007 + * Authors: + * Chandra Seetharaman <sekharan@us.ibm.com> + * Mike Anderson <andmike@linux.vnet.ibm.com> + */ + +#include <scsi/scsi_dh.h> +#include "../scsi_priv.h" + +static DEFINE_SPINLOCK(list_lock); +static LIST_HEAD(scsi_dh_list); + +static struct scsi_device_handler *get_device_handler(const char *name) +{ + struct scsi_device_handler *tmp, *found = NULL; + + spin_lock(&list_lock); + list_for_each_entry(tmp, &scsi_dh_list, list) { + if (!strcmp(tmp->name, name)) { + found = tmp; + break; + } + } + spin_unlock(&list_lock); + return found; +} + +static int scsi_dh_notifier_add(struct device *dev, void *data) +{ + struct scsi_device_handler *scsi_dh = data; + + scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_ADD_DEVICE, dev); + return 0; +} + +/* + * scsi_register_device_handler - register a device handler personality + * module. + * @scsi_dh - device handler to be registered. + * + * Returns 0 on success, -EBUSY if handler already registered. + */ +int scsi_register_device_handler(struct scsi_device_handler *scsi_dh) +{ + int ret = -EBUSY; + struct scsi_device_handler *tmp; + + tmp = get_device_handler(scsi_dh->name); + if (tmp) + goto done; + + ret = bus_register_notifier(&scsi_bus_type, &scsi_dh->nb); + + bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, scsi_dh_notifier_add); + spin_lock(&list_lock); + list_add(&scsi_dh->list, &scsi_dh_list); + spin_unlock(&list_lock); + +done: + return ret; +} +EXPORT_SYMBOL_GPL(scsi_register_device_handler); + +static int scsi_dh_notifier_remove(struct device *dev, void *data) +{ + struct scsi_device_handler *scsi_dh = data; + + scsi_dh->nb.notifier_call(&scsi_dh->nb, BUS_NOTIFY_DEL_DEVICE, dev); + return 0; +} + +/* + * scsi_unregister_device_handler - register a device handler personality + * module. + * @scsi_dh - device handler to be unregistered. + * + * Returns 0 on success, -ENODEV if handler not registered. + */ +int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh) +{ + int ret = -ENODEV; + struct scsi_device_handler *tmp; + + tmp = get_device_handler(scsi_dh->name); + if (!tmp) + goto done; + + ret = bus_unregister_notifier(&scsi_bus_type, &scsi_dh->nb); + + bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, + scsi_dh_notifier_remove); + spin_lock(&list_lock); + list_del(&scsi_dh->list); + spin_unlock(&list_lock); + +done: + return ret; +} +EXPORT_SYMBOL_GPL(scsi_unregister_device_handler); + +/* + * scsi_dh_activate - activate the path associated with the scsi_device + * corresponding to the given request queue. + * @q - Request queue that is associated with the scsi_device to be + * activated. + */ +int scsi_dh_activate(struct request_queue *q) +{ + int err = 0; + unsigned long flags; + struct scsi_device *sdev; + struct scsi_device_handler *scsi_dh = NULL; + + spin_lock_irqsave(q->queue_lock, flags); + sdev = q->queuedata; + if (sdev && sdev->scsi_dh_data) + scsi_dh = sdev->scsi_dh_data->scsi_dh; + if (!scsi_dh || !get_device(&sdev->sdev_gendev)) + err = SCSI_DH_NOSYS; + spin_unlock_irqrestore(q->queue_lock, flags); + + if (err) + return err; + + if (scsi_dh->activate) + err = scsi_dh->activate(sdev); + put_device(&sdev->sdev_gendev); + return err; +} +EXPORT_SYMBOL_GPL(scsi_dh_activate); + +/* + * scsi_dh_handler_exist - Return TRUE(1) if a device handler exists for + * the given name. FALSE(0) otherwise. + * @name - name of the device handler. + */ +int scsi_dh_handler_exist(const char *name) +{ + return (get_device_handler(name) != NULL); +} +EXPORT_SYMBOL_GPL(scsi_dh_handler_exist); + +MODULE_DESCRIPTION("SCSI device handler"); +MODULE_AUTHOR("Chandra Seetharaman <sekharan@us.ibm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c new file mode 100644 index 00000000000..ed53f14007a --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_emc.c @@ -0,0 +1,499 @@ +/* + * Target driver for EMC CLARiiON AX/CX-series hardware. + * Based on code from Lars Marowsky-Bree <lmb@suse.de> + * and Ed Goggin <egoggin@emc.com>. + * + * Copyright (C) 2006 Red Hat, Inc. All rights reserved. + * Copyright (C) 2006 Mike Christie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <scsi/scsi.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> +#include <scsi/scsi_device.h> + +#define CLARIION_NAME "emc_clariion" + +#define CLARIION_TRESPASS_PAGE 0x22 +#define CLARIION_BUFFER_SIZE 0x80 +#define CLARIION_TIMEOUT (60 * HZ) +#define CLARIION_RETRIES 3 +#define CLARIION_UNBOUND_LU -1 + +static unsigned char long_trespass[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x09, /* Page length - 2 */ + 0x81, /* Trespass code + Honor reservation bit */ + 0xff, 0xff, /* Trespass target */ + 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ +}; + +static unsigned char long_trespass_hr[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x09, /* Page length - 2 */ + 0x01, /* Trespass code + Honor reservation bit */ + 0xff, 0xff, /* Trespass target */ + 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ +}; + +static unsigned char short_trespass[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x02, /* Page length - 2 */ + 0x81, /* Trespass code + Honor reservation bit */ + 0xff, /* Trespass target */ +}; + +static unsigned char short_trespass_hr[] = { + 0, 0, 0, 0, + CLARIION_TRESPASS_PAGE, /* Page code */ + 0x02, /* Page length - 2 */ + 0x01, /* Trespass code + Honor reservation bit */ + 0xff, /* Trespass target */ +}; + +struct clariion_dh_data { + /* + * Use short trespass command (FC-series) or the long version + * (default for AX/CX CLARiiON arrays). + */ + unsigned short_trespass; + /* + * Whether or not (default) to honor SCSI reservations when + * initiating a switch-over. + */ + unsigned hr; + /* I/O buffer for both MODE_SELECT and INQUIRY commands. */ + char buffer[CLARIION_BUFFER_SIZE]; + /* + * SCSI sense buffer for commands -- assumes serial issuance + * and completion sequence of all commands for same multipath. + */ + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + /* which SP (A=0,B=1,UNBOUND=-1) is dflt SP for path's mapped dev */ + int default_sp; + /* which SP (A=0,B=1,UNBOUND=-1) is active for path's mapped dev */ + int current_sp; +}; + +static inline struct clariion_dh_data + *get_clariion_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct clariion_dh_data *) scsi_dh_data->buf); +} + +/* + * Parse MODE_SELECT cmd reply. + */ +static int trespass_endio(struct scsi_device *sdev, int result) +{ + int err = SCSI_DH_OK; + struct scsi_sense_hdr sshdr; + struct clariion_dh_data *csdev = get_clariion_data(sdev); + char *sense = csdev->sense; + + if (status_byte(result) == CHECK_CONDITION && + scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) { + sdev_printk(KERN_ERR, sdev, "Found valid sense data 0x%2x, " + "0x%2x, 0x%2x while sending CLARiiON trespass " + "command.\n", sshdr.sense_key, sshdr.asc, + sshdr.ascq); + + if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) && + (sshdr.ascq == 0x00)) { + /* + * Array based copy in progress -- do not send + * mode_select or copy will be aborted mid-stream. + */ + sdev_printk(KERN_INFO, sdev, "Array Based Copy in " + "progress while sending CLARiiON trespass " + "command.\n"); + err = SCSI_DH_DEV_TEMP_BUSY; + } else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) && + (sshdr.ascq == 0x03)) { + /* + * LUN Not Ready - Manual Intervention Required + * indicates in-progress ucode upgrade (NDU). + */ + sdev_printk(KERN_INFO, sdev, "Detected in-progress " + "ucode upgrade NDU operation while sending " + "CLARiiON trespass command.\n"); + err = SCSI_DH_DEV_TEMP_BUSY; + } else + err = SCSI_DH_DEV_FAILED; + } else if (result) { + sdev_printk(KERN_ERR, sdev, "Error 0x%x while sending " + "CLARiiON trespass command.\n", result); + err = SCSI_DH_IO; + } + + return err; +} + +static int parse_sp_info_reply(struct scsi_device *sdev, int result, + int *default_sp, int *current_sp, int *new_current_sp) +{ + int err = SCSI_DH_OK; + struct clariion_dh_data *csdev = get_clariion_data(sdev); + + if (result == 0) { + /* check for in-progress ucode upgrade (NDU) */ + if (csdev->buffer[48] != 0) { + sdev_printk(KERN_NOTICE, sdev, "Detected in-progress " + "ucode upgrade NDU operation while finding " + "current active SP."); + err = SCSI_DH_DEV_TEMP_BUSY; + } else { + *default_sp = csdev->buffer[5]; + + if (csdev->buffer[4] == 2) + /* SP for path is current */ + *current_sp = csdev->buffer[8]; + else { + if (csdev->buffer[4] == 1) + /* SP for this path is NOT current */ + if (csdev->buffer[8] == 0) + *current_sp = 1; + else + *current_sp = 0; + else + /* unbound LU or LUNZ */ + *current_sp = CLARIION_UNBOUND_LU; + } + *new_current_sp = csdev->buffer[8]; + } + } else { + struct scsi_sense_hdr sshdr; + + err = SCSI_DH_IO; + + if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, + &sshdr)) + sdev_printk(KERN_ERR, sdev, "Found valid sense data " + "0x%2x, 0x%2x, 0x%2x while finding current " + "active SP.", sshdr.sense_key, sshdr.asc, + sshdr.ascq); + else + sdev_printk(KERN_ERR, sdev, "Error 0x%x finding " + "current active SP.", result); + } + + return err; +} + +static int sp_info_endio(struct scsi_device *sdev, int result, + int mode_select_sent, int *done) +{ + struct clariion_dh_data *csdev = get_clariion_data(sdev); + int err_flags, default_sp, current_sp, new_current_sp; + + err_flags = parse_sp_info_reply(sdev, result, &default_sp, + ¤t_sp, &new_current_sp); + + if (err_flags != SCSI_DH_OK) + goto done; + + if (mode_select_sent) { + csdev->default_sp = default_sp; + csdev->current_sp = current_sp; + } else { + /* + * Issue the actual module_selec request IFF either + * (1) we do not know the identity of the current SP OR + * (2) what we think we know is actually correct. + */ + if ((current_sp != CLARIION_UNBOUND_LU) && + (new_current_sp != current_sp)) { + + csdev->default_sp = default_sp; + csdev->current_sp = current_sp; + + sdev_printk(KERN_INFO, sdev, "Ignoring path group " + "switch-over command for CLARiiON SP%s since " + " mapped device is already initialized.", + current_sp ? "B" : "A"); + if (done) + *done = 1; /* as good as doing it */ + } + } +done: + return err_flags; +} + +/* +* Get block request for REQ_BLOCK_PC command issued to path. Currently +* limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands. +* +* Uses data and sense buffers in hardware handler context structure and +* assumes serial servicing of commands, both issuance and completion. +*/ +static struct request *get_req(struct scsi_device *sdev, int cmd) +{ + struct clariion_dh_data *csdev = get_clariion_data(sdev); + struct request *rq; + unsigned char *page22; + int len = 0; + + rq = blk_get_request(sdev->request_queue, + (cmd == MODE_SELECT) ? WRITE : READ, GFP_ATOMIC); + if (!rq) { + sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed"); + return NULL; + } + + memset(&rq->cmd, 0, BLK_MAX_CDB); + rq->cmd[0] = cmd; + rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); + + switch (cmd) { + case MODE_SELECT: + if (csdev->short_trespass) { + page22 = csdev->hr ? short_trespass_hr : short_trespass; + len = sizeof(short_trespass); + } else { + page22 = csdev->hr ? long_trespass_hr : long_trespass; + len = sizeof(long_trespass); + } + /* + * Can't DMA from kernel BSS -- must copy selected trespass + * command mode page contents to context buffer which is + * allocated by kmalloc. + */ + BUG_ON((len > CLARIION_BUFFER_SIZE)); + memcpy(csdev->buffer, page22, len); + rq->cmd_flags |= REQ_RW; + rq->cmd[1] = 0x10; + break; + case INQUIRY: + rq->cmd[1] = 0x1; + rq->cmd[2] = 0xC0; + len = CLARIION_BUFFER_SIZE; + memset(csdev->buffer, 0, CLARIION_BUFFER_SIZE); + break; + default: + BUG_ON(1); + break; + } + + rq->cmd[4] = len; + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->cmd_flags |= REQ_FAILFAST; + rq->timeout = CLARIION_TIMEOUT; + rq->retries = CLARIION_RETRIES; + + rq->sense = csdev->sense; + memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); + rq->sense_len = 0; + + if (blk_rq_map_kern(sdev->request_queue, rq, csdev->buffer, + len, GFP_ATOMIC)) { + __blk_put_request(rq->q, rq); + return NULL; + } + + return rq; +} + +static int send_cmd(struct scsi_device *sdev, int cmd) +{ + struct request *rq = get_req(sdev, cmd); + + if (!rq) + return SCSI_DH_RES_TEMP_UNAVAIL; + + return blk_execute_rq(sdev->request_queue, NULL, rq, 1); +} + +static int clariion_activate(struct scsi_device *sdev) +{ + int result, done = 0; + + result = send_cmd(sdev, INQUIRY); + result = sp_info_endio(sdev, result, 0, &done); + if (result || done) + goto done; + + result = send_cmd(sdev, MODE_SELECT); + result = trespass_endio(sdev, result); + if (result) + goto done; + + result = send_cmd(sdev, INQUIRY); + result = sp_info_endio(sdev, result, 1, NULL); +done: + return result; +} + +static int clariion_check_sense(struct scsi_device *sdev, + struct scsi_sense_hdr *sense_hdr) +{ + switch (sense_hdr->sense_key) { + case NOT_READY: + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x03) + /* + * LUN Not Ready - Manual Intervention Required + * indicates this is a passive path. + * + * FIXME: However, if this is seen and EVPD C0 + * indicates that this is due to a NDU in + * progress, we should set FAIL_PATH too. + * This indicates we might have to do a SCSI + * inquiry in the end_io path. Ugh. + * + * Can return FAILED only when we want the error + * recovery process to kick in. + */ + return SUCCESS; + break; + case ILLEGAL_REQUEST: + if (sense_hdr->asc == 0x25 && sense_hdr->ascq == 0x01) + /* + * An array based copy is in progress. Do not + * fail the path, do not bypass to another PG, + * do not retry. Fail the IO immediately. + * (Actually this is the same conclusion as in + * the default handler, but lets make sure.) + * + * Can return FAILED only when we want the error + * recovery process to kick in. + */ + return SUCCESS; + break; + case UNIT_ATTENTION: + if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) + /* + * Unit Attention Code. This is the first IO + * to the new path, so just retry. + */ + return NEEDS_RETRY; + break; + } + + /* success just means we do not care what scsi-ml does */ + return SUCCESS; +} + +static const struct { + char *vendor; + char *model; +} clariion_dev_list[] = { + {"DGC", "RAID"}, + {"DGC", "DISK"}, + {NULL, NULL}, +}; + +static int clariion_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler clariion_dh = { + .name = CLARIION_NAME, + .module = THIS_MODULE, + .nb.notifier_call = clariion_bus_notify, + .check_sense = clariion_check_sense, + .activate = clariion_activate, +}; + +/* + * TODO: need some interface so we can set trespass values + */ +static int clariion_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + struct clariion_dh_data *h; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; clariion_dev_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor, + strlen(clariion_dev_list[i].vendor)) && + !strncmp(sdev->model, clariion_dev_list[i].model, + strlen(clariion_dev_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(*h) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n", + CLARIION_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &clariion_dh; + h = (struct clariion_dh_data *) scsi_dh_data->buf; + h->default_sp = CLARIION_UNBOUND_LU; + h->current_sp = CLARIION_UNBOUND_LU; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", CLARIION_NAME); + try_module_get(THIS_MODULE); + + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &clariion_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", + CLARIION_NAME); + + kfree(scsi_dh_data); + module_put(THIS_MODULE); + } + +out: + return 0; +} + +static int __init clariion_init(void) +{ + int r; + + r = scsi_register_device_handler(&clariion_dh); + if (r != 0) + printk(KERN_ERR "Failed to register scsi device handler."); + return r; +} + +static void __exit clariion_exit(void) +{ + scsi_unregister_device_handler(&clariion_dh); +} + +module_init(clariion_init); +module_exit(clariion_exit); + +MODULE_DESCRIPTION("EMC CX/AX/FC-family driver"); +MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, Chandra Seetharaman <sekharan@us.ibm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c new file mode 100644 index 00000000000..12ceab7b366 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c @@ -0,0 +1,202 @@ +/* + * Basic HP/COMPAQ MSA 1000 support. This is only needed if your HW cannot be + * upgraded. + * + * Copyright (C) 2006 Red Hat, Inc. All rights reserved. + * Copyright (C) 2006 Mike Christie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <scsi/scsi.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> + +#define HP_SW_NAME "hp_sw" + +#define HP_SW_TIMEOUT (60 * HZ) +#define HP_SW_RETRIES 3 + +struct hp_sw_dh_data { + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + int retries; +}; + +static inline struct hp_sw_dh_data *get_hp_sw_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct hp_sw_dh_data *) scsi_dh_data->buf); +} + +static int hp_sw_done(struct scsi_device *sdev) +{ + struct hp_sw_dh_data *h = get_hp_sw_data(sdev); + struct scsi_sense_hdr sshdr; + int rc; + + sdev_printk(KERN_INFO, sdev, "hp_sw_done\n"); + + rc = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sshdr); + if (!rc) + goto done; + switch (sshdr.sense_key) { + case NOT_READY: + if ((sshdr.asc == 0x04) && (sshdr.ascq == 3)) { + rc = SCSI_DH_RETRY; + h->retries++; + break; + } + /* fall through */ + default: + h->retries++; + rc = SCSI_DH_IMM_RETRY; + } + +done: + if (rc == SCSI_DH_OK || rc == SCSI_DH_IO) + h->retries = 0; + else if (h->retries > HP_SW_RETRIES) { + h->retries = 0; + rc = SCSI_DH_IO; + } + return rc; +} + +static int hp_sw_activate(struct scsi_device *sdev) +{ + struct hp_sw_dh_data *h = get_hp_sw_data(sdev); + struct request *req; + int ret = SCSI_DH_RES_TEMP_UNAVAIL; + + req = blk_get_request(sdev->request_queue, WRITE, GFP_ATOMIC); + if (!req) + goto done; + + sdev_printk(KERN_INFO, sdev, "sending START_STOP."); + + req->cmd_type = REQ_TYPE_BLOCK_PC; + req->cmd_flags |= REQ_FAILFAST; + req->cmd_len = COMMAND_SIZE(START_STOP); + memset(req->cmd, 0, MAX_COMMAND_SIZE); + req->cmd[0] = START_STOP; + req->cmd[4] = 1; /* Start spin cycle */ + req->timeout = HP_SW_TIMEOUT; + req->sense = h->sense; + memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE); + req->sense_len = 0; + + ret = blk_execute_rq(req->q, NULL, req, 1); + if (!ret) /* SUCCESS */ + ret = hp_sw_done(sdev); + else + ret = SCSI_DH_IO; +done: + return ret; +} + +static const struct { + char *vendor; + char *model; +} hp_sw_dh_data_list[] = { + {"COMPAQ", "MSA"}, + {"HP", "HSV"}, + {"DEC", "HSG80"}, + {NULL, NULL}, +}; + +static int hp_sw_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler hp_sw_dh = { + .name = HP_SW_NAME, + .module = THIS_MODULE, + .nb.notifier_call = hp_sw_bus_notify, + .activate = hp_sw_activate, +}; + +static int hp_sw_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; hp_sw_dh_data_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, hp_sw_dh_data_list[i].vendor, + strlen(hp_sw_dh_data_list[i].vendor)) && + !strncmp(sdev->model, hp_sw_dh_data_list[i].model, + strlen(hp_sw_dh_data_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(struct hp_sw_dh_data) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach Failed %s.\n", + HP_SW_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &hp_sw_dh; + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + try_module_get(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", HP_SW_NAME); + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &hp_sw_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + module_put(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", HP_SW_NAME); + + kfree(scsi_dh_data); + } + +out: + return 0; +} + +static int __init hp_sw_init(void) +{ + return scsi_register_device_handler(&hp_sw_dh); +} + +static void __exit hp_sw_exit(void) +{ + scsi_unregister_device_handler(&hp_sw_dh); +} + +module_init(hp_sw_init); +module_exit(hp_sw_exit); + +MODULE_DESCRIPTION("HP MSA 1000"); +MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c new file mode 100644 index 00000000000..6fff077a888 --- /dev/null +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -0,0 +1,691 @@ +/* + * Engenio/LSI RDAC SCSI Device Handler + * + * Copyright (C) 2005 Mike Christie. All rights reserved. + * Copyright (C) Chandra Seetharaman, IBM Corp. 2007 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ +#include <scsi/scsi.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_dh.h> + +#define RDAC_NAME "rdac" + +/* + * LSI mode page stuff + * + * These struct definitions and the forming of the + * mode page were taken from the LSI RDAC 2.4 GPL'd + * driver, and then converted to Linux conventions. + */ +#define RDAC_QUIESCENCE_TIME 20; +/* + * Page Codes + */ +#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c + +/* + * Controller modes definitions + */ +#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02 + +/* + * RDAC Options field + */ +#define RDAC_FORCED_QUIESENCE 0x02 + +#define RDAC_TIMEOUT (60 * HZ) +#define RDAC_RETRIES 3 + +struct rdac_mode_6_hdr { + u8 data_len; + u8 medium_type; + u8 device_params; + u8 block_desc_len; +}; + +struct rdac_mode_10_hdr { + u16 data_len; + u8 medium_type; + u8 device_params; + u16 reserved; + u16 block_desc_len; +}; + +struct rdac_mode_common { + u8 controller_serial[16]; + u8 alt_controller_serial[16]; + u8 rdac_mode[2]; + u8 alt_rdac_mode[2]; + u8 quiescence_timeout; + u8 rdac_options; +}; + +struct rdac_pg_legacy { + struct rdac_mode_6_hdr hdr; + u8 page_code; + u8 page_len; + struct rdac_mode_common common; +#define MODE6_MAX_LUN 32 + u8 lun_table[MODE6_MAX_LUN]; + u8 reserved2[32]; + u8 reserved3; + u8 reserved4; +}; + +struct rdac_pg_expanded { + struct rdac_mode_10_hdr hdr; + u8 page_code; + u8 subpage_code; + u8 page_len[2]; + struct rdac_mode_common common; + u8 lun_table[256]; + u8 reserved3; + u8 reserved4; +}; + +struct c9_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC9 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "vace" */ + u8 avte_cvp; + u8 path_prio; + u8 reserved2[38]; +}; + +#define SUBSYS_ID_LEN 16 +#define SLOT_ID_LEN 2 + +struct c4_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC4 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "subs" */ + u8 subsys_id[SUBSYS_ID_LEN]; + u8 revision[4]; + u8 slot_id[SLOT_ID_LEN]; + u8 reserved[2]; +}; + +struct rdac_controller { + u8 subsys_id[SUBSYS_ID_LEN]; + u8 slot_id[SLOT_ID_LEN]; + int use_ms10; + struct kref kref; + struct list_head node; /* list of all controllers */ + union { + struct rdac_pg_legacy legacy; + struct rdac_pg_expanded expanded; + } mode_select; +}; +struct c8_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC8 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "edid" */ + u8 reserved2[3]; + u8 vol_uniq_id_len; + u8 vol_uniq_id[16]; + u8 vol_user_label_len; + u8 vol_user_label[60]; + u8 array_uniq_id_len; + u8 array_unique_id[16]; + u8 array_user_label_len; + u8 array_user_label[60]; + u8 lun[8]; +}; + +struct c2_inquiry { + u8 peripheral_info; + u8 page_code; /* 0xC2 */ + u8 reserved1; + u8 page_len; + u8 page_id[4]; /* "swr4" */ + u8 sw_version[3]; + u8 sw_date[3]; + u8 features_enabled; + u8 max_lun_supported; + u8 partitions[239]; /* Total allocation length should be 0xFF */ +}; + +struct rdac_dh_data { + struct rdac_controller *ctlr; +#define UNINITIALIZED_LUN (1 << 8) + unsigned lun; +#define RDAC_STATE_ACTIVE 0 +#define RDAC_STATE_PASSIVE 1 + unsigned char state; + unsigned char sense[SCSI_SENSE_BUFFERSIZE]; + union { + struct c2_inquiry c2; + struct c4_inquiry c4; + struct c8_inquiry c8; + struct c9_inquiry c9; + } inq; +}; + +static LIST_HEAD(ctlr_list); +static DEFINE_SPINLOCK(list_lock); + +static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev) +{ + struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data; + BUG_ON(scsi_dh_data == NULL); + return ((struct rdac_dh_data *) scsi_dh_data->buf); +} + +static struct request *get_rdac_req(struct scsi_device *sdev, + void *buffer, unsigned buflen, int rw) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + + rq = blk_get_request(q, rw, GFP_KERNEL); + + if (!rq) { + sdev_printk(KERN_INFO, sdev, + "get_rdac_req: blk_get_request failed.\n"); + return NULL; + } + + if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_KERNEL)) { + blk_put_request(rq); + sdev_printk(KERN_INFO, sdev, + "get_rdac_req: blk_rq_map_kern failed.\n"); + return NULL; + } + + memset(&rq->cmd, 0, BLK_MAX_CDB); + rq->sense = h->sense; + memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); + rq->sense_len = 0; + + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE; + rq->retries = RDAC_RETRIES; + rq->timeout = RDAC_TIMEOUT; + + return rq; +} + +static struct request *rdac_failover_get(struct scsi_device *sdev) +{ + struct request *rq; + struct rdac_mode_common *common; + unsigned data_size; + struct rdac_dh_data *h = get_rdac_data(sdev); + + if (h->ctlr->use_ms10) { + struct rdac_pg_expanded *rdac_pg; + + data_size = sizeof(struct rdac_pg_expanded); + rdac_pg = &h->ctlr->mode_select.expanded; + memset(rdac_pg, 0, data_size); + common = &rdac_pg->common; + rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40; + rdac_pg->subpage_code = 0x1; + rdac_pg->page_len[0] = 0x01; + rdac_pg->page_len[1] = 0x28; + rdac_pg->lun_table[h->lun] = 0x81; + } else { + struct rdac_pg_legacy *rdac_pg; + + data_size = sizeof(struct rdac_pg_legacy); + rdac_pg = &h->ctlr->mode_select.legacy; + memset(rdac_pg, 0, data_size); + common = &rdac_pg->common; + rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER; + rdac_pg->page_len = 0x68; + rdac_pg->lun_table[h->lun] = 0x81; + } + common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS; + common->quiescence_timeout = RDAC_QUIESCENCE_TIME; + common->rdac_options = RDAC_FORCED_QUIESENCE; + + /* get request for block layer packet command */ + rq = get_rdac_req(sdev, &h->ctlr->mode_select, data_size, WRITE); + if (!rq) + return NULL; + + /* Prepare the command. */ + if (h->ctlr->use_ms10) { + rq->cmd[0] = MODE_SELECT_10; + rq->cmd[7] = data_size >> 8; + rq->cmd[8] = data_size & 0xff; + } else { + rq->cmd[0] = MODE_SELECT; + rq->cmd[4] = data_size; + } + rq->cmd_len = COMMAND_SIZE(rq->cmd[0]); + + return rq; +} + +static void release_controller(struct kref *kref) +{ + struct rdac_controller *ctlr; + ctlr = container_of(kref, struct rdac_controller, kref); + + spin_lock(&list_lock); + list_del(&ctlr->node); + spin_unlock(&list_lock); + kfree(ctlr); +} + +static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id) +{ + struct rdac_controller *ctlr, *tmp; + + spin_lock(&list_lock); + + list_for_each_entry(tmp, &ctlr_list, node) { + if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) && + (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) { + kref_get(&tmp->kref); + spin_unlock(&list_lock); + return tmp; + } + } + ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC); + if (!ctlr) + goto done; + + /* initialize fields of controller */ + memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN); + memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN); + kref_init(&ctlr->kref); + ctlr->use_ms10 = -1; + list_add(&ctlr->node, &ctlr_list); +done: + spin_unlock(&list_lock); + return ctlr; +} + +static int submit_inquiry(struct scsi_device *sdev, int page_code, + unsigned int len) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_RES_TEMP_UNAVAIL; + + rq = get_rdac_req(sdev, &h->inq, len, READ); + if (!rq) + goto done; + + /* Prepare the command. */ + rq->cmd[0] = INQUIRY; + rq->cmd[1] = 1; + rq->cmd[2] = page_code; + rq->cmd[4] = len; + rq->cmd_len = COMMAND_SIZE(INQUIRY); + err = blk_execute_rq(q, NULL, rq, 1); + if (err == -EIO) + err = SCSI_DH_IO; +done: + return err; +} + +static int get_lun(struct scsi_device *sdev) +{ + int err; + struct c8_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c8; + h->lun = inqp->lun[7]; /* currently it uses only one byte */ + } + return err; +} + +#define RDAC_OWNED 0 +#define RDAC_UNOWNED 1 +#define RDAC_FAILED 2 +static int check_ownership(struct scsi_device *sdev) +{ + int err; + struct c9_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry)); + if (err == SCSI_DH_OK) { + err = RDAC_UNOWNED; + inqp = &h->inq.c9; + /* + * If in AVT mode or if the path already owns the LUN, + * return RDAC_OWNED; + */ + if (((inqp->avte_cvp >> 7) == 0x1) || + ((inqp->avte_cvp & 0x1) != 0)) + err = RDAC_OWNED; + } else + err = RDAC_FAILED; + return err; +} + +static int initialize_controller(struct scsi_device *sdev) +{ + int err; + struct c4_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c4; + h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id); + if (!h->ctlr) + err = SCSI_DH_RES_TEMP_UNAVAIL; + } + return err; +} + +static int set_mode_select(struct scsi_device *sdev) +{ + int err; + struct c2_inquiry *inqp; + struct rdac_dh_data *h = get_rdac_data(sdev); + + err = submit_inquiry(sdev, 0xC2, sizeof(struct c2_inquiry)); + if (err == SCSI_DH_OK) { + inqp = &h->inq.c2; + /* + * If more than MODE6_MAX_LUN luns are supported, use + * mode select 10 + */ + if (inqp->max_lun_supported >= MODE6_MAX_LUN) + h->ctlr->use_ms10 = 1; + else + h->ctlr->use_ms10 = 0; + } + return err; +} + +static int mode_select_handle_sense(struct scsi_device *sdev) +{ + struct scsi_sense_hdr sense_hdr; + struct rdac_dh_data *h = get_rdac_data(sdev); + int sense, err = SCSI_DH_IO, ret; + + ret = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, &sense_hdr); + if (!ret) + goto done; + + err = SCSI_DH_OK; + sense = (sense_hdr.sense_key << 16) | (sense_hdr.asc << 8) | + sense_hdr.ascq; + /* If it is retryable failure, submit the c9 inquiry again */ + if (sense == 0x59136 || sense == 0x68b02 || sense == 0xb8b02 || + sense == 0x62900) { + /* 0x59136 - Command lock contention + * 0x[6b]8b02 - Quiesense in progress or achieved + * 0x62900 - Power On, Reset, or Bus Device Reset + */ + err = SCSI_DH_RETRY; + } + + if (sense) + sdev_printk(KERN_INFO, sdev, + "MODE_SELECT failed with sense 0x%x.\n", sense); +done: + return err; +} + +static int send_mode_select(struct scsi_device *sdev) +{ + struct request *rq; + struct request_queue *q = sdev->request_queue; + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_RES_TEMP_UNAVAIL; + + rq = rdac_failover_get(sdev); + if (!rq) + goto done; + + sdev_printk(KERN_INFO, sdev, "queueing MODE_SELECT command.\n"); + + err = blk_execute_rq(q, NULL, rq, 1); + if (err != SCSI_DH_OK) + err = mode_select_handle_sense(sdev); + if (err == SCSI_DH_OK) + h->state = RDAC_STATE_ACTIVE; +done: + return err; +} + +static int rdac_activate(struct scsi_device *sdev) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + int err = SCSI_DH_OK; + + if (h->lun == UNINITIALIZED_LUN) { + err = get_lun(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + err = check_ownership(sdev); + switch (err) { + case RDAC_UNOWNED: + break; + case RDAC_OWNED: + err = SCSI_DH_OK; + goto done; + case RDAC_FAILED: + default: + err = SCSI_DH_IO; + goto done; + } + + if (!h->ctlr) { + err = initialize_controller(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + if (h->ctlr->use_ms10 == -1) { + err = set_mode_select(sdev); + if (err != SCSI_DH_OK) + goto done; + } + + err = send_mode_select(sdev); +done: + return err; +} + +static int rdac_prep_fn(struct scsi_device *sdev, struct request *req) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + int ret = BLKPREP_OK; + + if (h->state != RDAC_STATE_ACTIVE) { + ret = BLKPREP_KILL; + req->cmd_flags |= REQ_QUIET; + } + return ret; + +} + +static int rdac_check_sense(struct scsi_device *sdev, + struct scsi_sense_hdr *sense_hdr) +{ + struct rdac_dh_data *h = get_rdac_data(sdev); + switch (sense_hdr->sense_key) { + case NOT_READY: + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81) + /* LUN Not Ready - Storage firmware incompatible + * Manual code synchonisation required. + * + * Nothing we can do here. Try to bypass the path. + */ + return SUCCESS; + if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0xA1) + /* LUN Not Ready - Quiescense in progress + * + * Just retry and wait. + */ + return NEEDS_RETRY; + break; + case ILLEGAL_REQUEST: + if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) { + /* Invalid Request - Current Logical Unit Ownership. + * Controller is not the current owner of the LUN, + * Fail the path, so that the other path be used. + */ + h->state = RDAC_STATE_PASSIVE; + return SUCCESS; + } + break; + case UNIT_ATTENTION: + if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) + /* + * Power On, Reset, or Bus Device Reset, just retry. + */ + return NEEDS_RETRY; + break; + } + /* success just means we do not care what scsi-ml does */ + return SCSI_RETURN_NOT_HANDLED; +} + +static const struct { + char *vendor; + char *model; +} rdac_dev_list[] = { + {"IBM", "1722"}, + {"IBM", "1724"}, + {"IBM", "1726"}, + {"IBM", "1742"}, + {"IBM", "1814"}, + {"IBM", "1815"}, + {"IBM", "1818"}, + {"IBM", "3526"}, + {"SGI", "TP9400"}, + {"SGI", "TP9500"}, + {"SGI", "IS"}, + {"STK", "OPENstorage D280"}, + {"SUN", "CSM200_R"}, + {"SUN", "LCSM100_F"}, + {NULL, NULL}, +}; + +static int rdac_bus_notify(struct notifier_block *, unsigned long, void *); + +static struct scsi_device_handler rdac_dh = { + .name = RDAC_NAME, + .module = THIS_MODULE, + .nb.notifier_call = rdac_bus_notify, + .prep_fn = rdac_prep_fn, + .check_sense = rdac_check_sense, + .activate = rdac_activate, +}; + +/* + * TODO: need some interface so we can set trespass values + */ +static int rdac_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_dh_data *scsi_dh_data; + struct rdac_dh_data *h; + int i, found = 0; + unsigned long flags; + + if (action == BUS_NOTIFY_ADD_DEVICE) { + for (i = 0; rdac_dev_list[i].vendor; i++) { + if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor, + strlen(rdac_dev_list[i].vendor)) && + !strncmp(sdev->model, rdac_dev_list[i].model, + strlen(rdac_dev_list[i].model))) { + found = 1; + break; + } + } + if (!found) + goto out; + + scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) + + sizeof(*h) , GFP_KERNEL); + if (!scsi_dh_data) { + sdev_printk(KERN_ERR, sdev, "Attach failed %s.\n", + RDAC_NAME); + goto out; + } + + scsi_dh_data->scsi_dh = &rdac_dh; + h = (struct rdac_dh_data *) scsi_dh_data->buf; + h->lun = UNINITIALIZED_LUN; + h->state = RDAC_STATE_ACTIVE; + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + sdev->scsi_dh_data = scsi_dh_data; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + try_module_get(THIS_MODULE); + + sdev_printk(KERN_NOTICE, sdev, "Attached %s.\n", RDAC_NAME); + + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (sdev->scsi_dh_data == NULL || + sdev->scsi_dh_data->scsi_dh != &rdac_dh) + goto out; + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + scsi_dh_data = sdev->scsi_dh_data; + sdev->scsi_dh_data = NULL; + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + + h = (struct rdac_dh_data *) scsi_dh_data->buf; + if (h->ctlr) + kref_put(&h->ctlr->kref, release_controller); + kfree(scsi_dh_data); + module_put(THIS_MODULE); + sdev_printk(KERN_NOTICE, sdev, "Dettached %s.\n", RDAC_NAME); + } + +out: + return 0; +} + +static int __init rdac_init(void) +{ + int r; + + r = scsi_register_device_handler(&rdac_dh); + if (r != 0) + printk(KERN_ERR "Failed to register scsi device handler."); + return r; +} + +static void __exit rdac_exit(void) +{ + scsi_unregister_device_handler(&rdac_dh); +} + +module_init(rdac_init); +module_exit(rdac_exit); + +MODULE_DESCRIPTION("Multipath LSI/Engenio RDAC driver"); +MODULE_AUTHOR("Mike Christie, Chandra Seetharaman"); +MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 59fbef08d69..62a4618530d 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -219,19 +219,10 @@ static void esp_reset_esp(struct esp *esp) /* Now reset the ESP chip */ scsi_esp_cmd(esp, ESP_CMD_RC); scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); + if (esp->rev == FAST) + esp_write8(ESP_CONFIG2_FENAB, ESP_CFG2); scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); - /* Reload the configuration registers */ - esp_write8(esp->cfact, ESP_CFACT); - - esp->prev_stp = 0; - esp_write8(esp->prev_stp, ESP_STP); - - esp->prev_soff = 0; - esp_write8(esp->prev_soff, ESP_SOFF); - - esp_write8(esp->neg_defp, ESP_TIMEO); - /* This is the only point at which it is reliable to read * the ID-code for a fast ESP chip variants. */ @@ -316,6 +307,17 @@ static void esp_reset_esp(struct esp *esp) break; } + /* Reload the configuration registers */ + esp_write8(esp->cfact, ESP_CFACT); + + esp->prev_stp = 0; + esp_write8(esp->prev_stp, ESP_STP); + + esp->prev_soff = 0; + esp_write8(esp->prev_soff, ESP_SOFF); + + esp_write8(esp->neg_defp, ESP_TIMEO); + /* Eat any bitrot in the chip */ esp_read8(ESP_INTRPT); udelay(100); diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index c6457bfc8a4..35cd892dce0 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -290,7 +290,7 @@ static void scsi_host_dev_release(struct device *dev) kfree(shost); } -struct device_type scsi_host_type = { +static struct device_type scsi_host_type = { .name = "scsi_host", .release = scsi_host_dev_release, }; diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile index 6ac0633d545..a423d963362 100644 --- a/drivers/scsi/ibmvscsi/Makefile +++ b/drivers/scsi/ibmvscsi/Makefile @@ -5,3 +5,4 @@ ibmvscsic-$(CONFIG_PPC_ISERIES) += iseries_vscsi.o ibmvscsic-$(CONFIG_PPC_PSERIES) += rpa_vscsi.o obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvstgt.o +obj-$(CONFIG_SCSI_IBMVFC) += ibmvfc.o diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c new file mode 100644 index 00000000000..eb702b96d57 --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -0,0 +1,3910 @@ +/* + * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter + * + * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation + * + * Copyright (C) IBM Corporation, 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kthread.h> +#include <linux/of.h> +#include <linux/stringify.h> +#include <asm/firmware.h> +#include <asm/irq.h> +#include <asm/vio.h> +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_transport_fc.h> +#include "ibmvfc.h" + +static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; +static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; +static unsigned int max_lun = IBMVFC_MAX_LUN; +static unsigned int max_targets = IBMVFC_MAX_TARGETS; +static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; +static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; +static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; +static unsigned int ibmvfc_debug = IBMVFC_DEBUG; +static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; +static LIST_HEAD(ibmvfc_head); +static DEFINE_SPINLOCK(ibmvfc_driver_lock); +static struct scsi_transport_template *ibmvfc_transport_template; + +MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); +MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(IBMVFC_DRIVER_VERSION); + +module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " + "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); +module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(default_timeout, + "Default timeout in seconds for initialization and EH commands. " + "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); +module_param_named(max_requests, max_requests, uint, S_IRUGO); +MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " + "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); +module_param_named(max_lun, max_lun, uint, S_IRUGO); +MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " + "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); +module_param_named(max_targets, max_targets, uint, S_IRUGO); +MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " + "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); +module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " + "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); +module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Enable driver debug information. " + "[Default=" __stringify(IBMVFC_DEBUG) "]"); +module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " + "transport should insulate the loss of a remote port. Once this " + "value is exceeded, the scsi target is removed. " + "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); +module_param_named(log_level, log_level, uint, 0); +MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " + "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); + +static const struct { + u16 status; + u16 error; + u8 result; + u8 retry; + int log; + char *name; +} cmd_status [] = { + { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, + { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, + + { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, + { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, + + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, + { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, + { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, + { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, + { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, + { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, + { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, + { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, + { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, + { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, + + { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, +}; + +static void ibmvfc_npiv_login(struct ibmvfc_host *); +static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); +static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); +static void ibmvfc_tgt_query_target(struct ibmvfc_target *); + +static const char *unknown_error = "unknown error"; + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +/** + * ibmvfc_trc_start - Log a start trace entry + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_trc_start(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; + struct ibmvfc_mad_common *mad = &evt->iu.mad_common; + struct ibmvfc_trace_entry *entry; + + entry = &vhost->trace[vhost->trace_index++]; + entry->evt = evt; + entry->time = jiffies; + entry->fmt = evt->crq.format; + entry->type = IBMVFC_TRC_START; + + switch (entry->fmt) { + case IBMVFC_CMD_FORMAT: + entry->op_code = vfc_cmd->iu.cdb[0]; + entry->scsi_id = vfc_cmd->tgt_scsi_id; + entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); + entry->tmf_flags = vfc_cmd->iu.tmf_flags; + entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; + break; + case IBMVFC_MAD_FORMAT: + entry->op_code = mad->opcode; + break; + default: + break; + }; +} + +/** + * ibmvfc_trc_end - Log an end trace entry + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_trc_end(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; + struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; + + entry->evt = evt; + entry->time = jiffies; + entry->fmt = evt->crq.format; + entry->type = IBMVFC_TRC_END; + + switch (entry->fmt) { + case IBMVFC_CMD_FORMAT: + entry->op_code = vfc_cmd->iu.cdb[0]; + entry->scsi_id = vfc_cmd->tgt_scsi_id; + entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); + entry->tmf_flags = vfc_cmd->iu.tmf_flags; + entry->u.end.status = vfc_cmd->status; + entry->u.end.error = vfc_cmd->error; + entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; + entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; + entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; + break; + case IBMVFC_MAD_FORMAT: + entry->op_code = mad->opcode; + entry->u.end.status = mad->status; + break; + default: + break; + + }; +} + +#else +#define ibmvfc_trc_start(evt) do { } while (0) +#define ibmvfc_trc_end(evt) do { } while (0) +#endif + +/** + * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response + * @status: status / error class + * @error: error + * + * Return value: + * index into cmd_status / -EINVAL on failure + **/ +static int ibmvfc_get_err_index(u16 status, u16 error) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(cmd_status); i++) + if ((cmd_status[i].status & status) == cmd_status[i].status && + cmd_status[i].error == error) + return i; + + return -EINVAL; +} + +/** + * ibmvfc_get_cmd_error - Find the error description for the fcp response + * @status: status / error class + * @error: error + * + * Return value: + * error description string + **/ +static const char *ibmvfc_get_cmd_error(u16 status, u16 error) +{ + int rc = ibmvfc_get_err_index(status, error); + if (rc >= 0) + return cmd_status[rc].name; + return unknown_error; +} + +/** + * ibmvfc_get_err_result - Find the scsi status to return for the fcp response + * @vfc_cmd: ibmvfc command struct + * + * Return value: + * SCSI result value to return for completed command + **/ +static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) +{ + int err; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + int fc_rsp_len = rsp->fcp_rsp_len; + + if ((rsp->flags & FCP_RSP_LEN_VALID) && + ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || + rsp->data.info.rsp_code)) + return DID_ERROR << 16; + + if (!vfc_cmd->status) { + if (rsp->flags & FCP_RESID_OVER) + return rsp->scsi_status | (DID_ERROR << 16); + else + return rsp->scsi_status | (DID_OK << 16); + } + + err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); + if (err >= 0) + return rsp->scsi_status | (cmd_status[err].result << 16); + return rsp->scsi_status | (DID_ERROR << 16); +} + +/** + * ibmvfc_retry_cmd - Determine if error status is retryable + * @status: status / error class + * @error: error + * + * Return value: + * 1 if error should be retried / 0 if it should not + **/ +static int ibmvfc_retry_cmd(u16 status, u16 error) +{ + int rc = ibmvfc_get_err_index(status, error); + + if (rc >= 0) + return cmd_status[rc].retry; + return 1; +} + +static const char *unknown_fc_explain = "unknown fc explain"; + +static const struct { + u16 fc_explain; + char *name; +} ls_explain [] = { + { 0x00, "no additional explanation" }, + { 0x01, "service parameter error - options" }, + { 0x03, "service parameter error - initiator control" }, + { 0x05, "service parameter error - recipient control" }, + { 0x07, "service parameter error - received data field size" }, + { 0x09, "service parameter error - concurrent seq" }, + { 0x0B, "service parameter error - credit" }, + { 0x0D, "invalid N_Port/F_Port_Name" }, + { 0x0E, "invalid node/Fabric Name" }, + { 0x0F, "invalid common service parameters" }, + { 0x11, "invalid association header" }, + { 0x13, "association header required" }, + { 0x15, "invalid originator S_ID" }, + { 0x17, "invalid OX_ID-RX-ID combination" }, + { 0x19, "command (request) already in progress" }, + { 0x1E, "N_Port Login requested" }, + { 0x1F, "Invalid N_Port_ID" }, +}; + +static const struct { + u16 fc_explain; + char *name; +} gs_explain [] = { + { 0x00, "no additional explanation" }, + { 0x01, "port identifier not registered" }, + { 0x02, "port name not registered" }, + { 0x03, "node name not registered" }, + { 0x04, "class of service not registered" }, + { 0x06, "initial process associator not registered" }, + { 0x07, "FC-4 TYPEs not registered" }, + { 0x08, "symbolic port name not registered" }, + { 0x09, "symbolic node name not registered" }, + { 0x0A, "port type not registered" }, + { 0xF0, "authorization exception" }, + { 0xF1, "authentication exception" }, + { 0xF2, "data base full" }, + { 0xF3, "data base empty" }, + { 0xF4, "processing request" }, + { 0xF5, "unable to verify connection" }, + { 0xF6, "devices not in a common zone" }, +}; + +/** + * ibmvfc_get_ls_explain - Return the FC Explain description text + * @status: FC Explain status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_ls_explain(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ls_explain); i++) + if (ls_explain[i].fc_explain == status) + return ls_explain[i].name; + + return unknown_fc_explain; +} + +/** + * ibmvfc_get_gs_explain - Return the FC Explain description text + * @status: FC Explain status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_gs_explain(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(gs_explain); i++) + if (gs_explain[i].fc_explain == status) + return gs_explain[i].name; + + return unknown_fc_explain; +} + +static const struct { + enum ibmvfc_fc_type fc_type; + char *name; +} fc_type [] = { + { IBMVFC_FABRIC_REJECT, "fabric reject" }, + { IBMVFC_PORT_REJECT, "port reject" }, + { IBMVFC_LS_REJECT, "ELS reject" }, + { IBMVFC_FABRIC_BUSY, "fabric busy" }, + { IBMVFC_PORT_BUSY, "port busy" }, + { IBMVFC_BASIC_REJECT, "basic reject" }, +}; + +static const char *unknown_fc_type = "unknown fc type"; + +/** + * ibmvfc_get_fc_type - Return the FC Type description text + * @status: FC Type error status + * + * Returns: + * error string + **/ +static const char *ibmvfc_get_fc_type(u16 status) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(fc_type); i++) + if (fc_type[i].fc_type == status) + return fc_type[i].name; + + return unknown_fc_type; +} + +/** + * ibmvfc_set_tgt_action - Set the next init action for the target + * @tgt: ibmvfc target struct + * @action: action to perform + * + **/ +static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, + enum ibmvfc_target_action action) +{ + switch (tgt->action) { + case IBMVFC_TGT_ACTION_DEL_RPORT: + break; + default: + tgt->action = action; + break; + } +} + +/** + * ibmvfc_set_host_state - Set the state for the host + * @vhost: ibmvfc host struct + * @state: state to set host to + * + * Returns: + * 0 if state changed / non-zero if not changed + **/ +static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, + enum ibmvfc_host_state state) +{ + int rc = 0; + + switch (vhost->state) { + case IBMVFC_HOST_OFFLINE: + rc = -EINVAL; + break; + default: + vhost->state = state; + break; + }; + + return rc; +} + +/** + * ibmvfc_set_host_action - Set the next init action for the host + * @vhost: ibmvfc host struct + * @action: action to perform + * + **/ +static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, + enum ibmvfc_host_action action) +{ + switch (action) { + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_INIT_WAIT: + if (vhost->action == IBMVFC_HOST_ACTION_INIT) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_QUERY: + switch (vhost->action) { + case IBMVFC_HOST_ACTION_INIT_WAIT: + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_TGT_ADD: + vhost->action = action; + break; + default: + break; + }; + break; + case IBMVFC_HOST_ACTION_TGT_INIT: + if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) + vhost->action = action; + break; + case IBMVFC_HOST_ACTION_INIT: + case IBMVFC_HOST_ACTION_TGT_DEL: + case IBMVFC_HOST_ACTION_QUERY_TGTS: + case IBMVFC_HOST_ACTION_TGT_ADD: + case IBMVFC_HOST_ACTION_NONE: + default: + vhost->action = action; + break; + }; +} + +/** + * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) + * @vhost: ibmvfc host struct + * + * Return value: + * nothing + **/ +static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) +{ + if (vhost->action == IBMVFC_HOST_ACTION_NONE) { + scsi_block_requests(vhost->host); + ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + } else + vhost->reinit = 1; + + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_link_down - Handle a link down event from the adapter + * @vhost: ibmvfc host struct + * @state: ibmvfc host state to enter + * + **/ +static void ibmvfc_link_down(struct ibmvfc_host *vhost, + enum ibmvfc_host_state state) +{ + struct ibmvfc_target *tgt; + + ENTER; + scsi_block_requests(vhost->host); + list_for_each_entry(tgt, &vhost->targets, queue) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + ibmvfc_set_host_state(vhost, state); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); + vhost->events_to_log |= IBMVFC_AE_LINKDOWN; + wake_up(&vhost->work_wait_q); + LEAVE; +} + +/** + * ibmvfc_init_host - Start host initialization + * @vhost: ibmvfc host struct + * + * Return value: + * nothing + **/ +static void ibmvfc_init_host(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { + if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { + dev_err(vhost->dev, + "Host initialization retries exceeded. Taking adapter offline\n"); + ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); + return; + } + } + + if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { + list_for_each_entry(tgt, &vhost->targets, queue) + tgt->need_login = 1; + scsi_block_requests(vhost->host); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + vhost->job_step = ibmvfc_npiv_login; + wake_up(&vhost->work_wait_q); + } +} + +/** + * ibmvfc_send_crq - Send a CRQ + * @vhost: ibmvfc host struct + * @word1: the first 64 bits of the data + * @word2: the second 64 bits of the data + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) +{ + struct vio_dev *vdev = to_vio_dev(vhost->dev); + return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); +} + +/** + * ibmvfc_send_crq_init - Send a CRQ init message + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) +{ + ibmvfc_dbg(vhost, "Sending CRQ init\n"); + return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); +} + +/** + * ibmvfc_send_crq_init_complete - Send a CRQ init complete message + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) +{ + ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); + return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); +} + +/** + * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ + * @vhost: ibmvfc host struct + * + * Frees irq, deallocates a page for messages, unmaps dma, and unregisters + * the crq with the hypervisor. + **/ +static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) +{ + long rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + ibmvfc_dbg(vhost, "Releasing CRQ\n"); + free_irq(vdev->irq, vhost); + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + vhost->state = IBMVFC_NO_CRQ; + dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); + free_page((unsigned long)crq->msgs); +} + +/** + * ibmvfc_reenable_crq_queue - reenables the CRQ + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) +{ + int rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + + /* Re-enable the CRQ */ + do { + rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); + } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + if (rc) + dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); + + return rc; +} + +/** + * ibmvfc_reset_crq - resets a crq after a failure + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) +{ + int rc; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + /* Close the CRQ */ + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + vhost->state = IBMVFC_NO_CRQ; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + + /* Clean out the queue */ + memset(crq->msgs, 0, PAGE_SIZE); + crq->cur = 0; + + /* And re-open it again */ + rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_CLOSED) + /* Adapter is good, but other end is not ready */ + dev_warn(vhost->dev, "Partner adapter not ready\n"); + else if (rc != 0) + dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); + + return rc; +} + +/** + * ibmvfc_valid_event - Determines if event is valid. + * @pool: event_pool that contains the event + * @evt: ibmvfc event to be checked for validity + * + * Return value: + * 1 if event is valid / 0 if event is not valid + **/ +static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, + struct ibmvfc_event *evt) +{ + int index = evt - pool->events; + if (index < 0 || index >= pool->size) /* outside of bounds */ + return 0; + if (evt != pool->events + index) /* unaligned */ + return 0; + return 1; +} + +/** + * ibmvfc_free_event - Free the specified event + * @evt: ibmvfc_event to be freed + * + **/ +static void ibmvfc_free_event(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_event_pool *pool = &vhost->pool; + + BUG_ON(!ibmvfc_valid_event(pool, evt)); + BUG_ON(atomic_inc_return(&evt->free) != 1); + list_add_tail(&evt->queue, &vhost->free); +} + +/** + * ibmvfc_scsi_eh_done - EH done function for queuecommand commands + * @evt: ibmvfc event struct + * + * This function does not setup any error status, that must be done + * before this function gets called. + **/ +static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) +{ + struct scsi_cmnd *cmnd = evt->cmnd; + + if (cmnd) { + scsi_dma_unmap(cmnd); + cmnd->scsi_done(cmnd); + } + + ibmvfc_free_event(evt); +} + +/** + * ibmvfc_fail_request - Fail request with specified error code + * @evt: ibmvfc event struct + * @error_code: error code to fail request with + * + * Return value: + * none + **/ +static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) +{ + if (evt->cmnd) { + evt->cmnd->result = (error_code << 16); + evt->done = ibmvfc_scsi_eh_done; + } else + evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; + + list_del(&evt->queue); + del_timer(&evt->timer); + ibmvfc_trc_end(evt); + evt->done(evt); +} + +/** + * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests + * @vhost: ibmvfc host struct + * @error_code: error code to fail requests with + * + * Return value: + * none + **/ +static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) +{ + struct ibmvfc_event *evt, *pos; + + ibmvfc_dbg(vhost, "Purging all requests\n"); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) + ibmvfc_fail_request(evt, error_code); +} + +/** + * __ibmvfc_reset_host - Reset the connection to the server (no locking) + * @vhost: struct ibmvfc host to reset + **/ +static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) +{ + int rc; + + scsi_block_requests(vhost->host); + ibmvfc_purge_requests(vhost, DID_ERROR); + if ((rc = ibmvfc_reset_crq(vhost)) || + (rc = ibmvfc_send_crq_init(vhost)) || + (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { + dev_err(vhost->dev, "Error after reset rc=%d\n", rc); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); +} + +/** + * ibmvfc_reset_host - Reset the connection to the server + * @vhost: struct ibmvfc host to reset + **/ +static void ibmvfc_reset_host(struct ibmvfc_host *vhost) +{ + unsigned long flags; + + spin_lock_irqsave(vhost->host->host_lock, flags); + __ibmvfc_reset_host(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_retry_host_init - Retry host initialization if allowed + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) +{ + if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { + if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { + dev_err(vhost->dev, + "Host initialization retries exceeded. Taking adapter offline\n"); + ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); + } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) + __ibmvfc_reset_host(vhost); + else + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + } + + wake_up(&vhost->work_wait_q); +} + +/** + * __ibmvfc_find_target - Find the specified scsi_target (no locking) + * @starget: scsi target struct + * + * Return value: + * ibmvfc_target struct / NULL if not found + **/ +static struct ibmvfc_target *__ibmvfc_find_target(struct scsi_target *starget) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_host *vhost = shost_priv(shost); + struct ibmvfc_target *tgt; + + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->target_id == starget->id) + return tgt; + return NULL; +} + +/** + * ibmvfc_find_target - Find the specified scsi_target + * @starget: scsi target struct + * + * Return value: + * ibmvfc_target struct / NULL if not found + **/ +static struct ibmvfc_target *ibmvfc_find_target(struct scsi_target *starget) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_target *tgt; + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + tgt = __ibmvfc_find_target(starget); + spin_unlock_irqrestore(shost->host_lock, flags); + return tgt; +} + +/** + * ibmvfc_get_host_speed - Get host port speed + * @shost: scsi host struct + * + * Return value: + * none + **/ +static void ibmvfc_get_host_speed(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + if (vhost->state == IBMVFC_ACTIVE) { + switch (vhost->login_buf->resp.link_speed / 100) { + case 1: + fc_host_speed(shost) = FC_PORTSPEED_1GBIT; + break; + case 2: + fc_host_speed(shost) = FC_PORTSPEED_2GBIT; + break; + case 4: + fc_host_speed(shost) = FC_PORTSPEED_4GBIT; + break; + case 8: + fc_host_speed(shost) = FC_PORTSPEED_8GBIT; + break; + case 10: + fc_host_speed(shost) = FC_PORTSPEED_10GBIT; + break; + case 16: + fc_host_speed(shost) = FC_PORTSPEED_16GBIT; + break; + default: + ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", + vhost->login_buf->resp.link_speed / 100); + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + break; + } + } else + fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; + spin_unlock_irqrestore(shost->host_lock, flags); +} + +/** + * ibmvfc_get_host_port_state - Get host port state + * @shost: scsi host struct + * + * Return value: + * none + **/ +static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + switch (vhost->state) { + case IBMVFC_INITIALIZING: + case IBMVFC_ACTIVE: + fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; + break; + case IBMVFC_LINK_DOWN: + fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; + break; + case IBMVFC_LINK_DEAD: + case IBMVFC_HOST_OFFLINE: + fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; + break; + case IBMVFC_HALTED: + fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; + break; + default: + ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); + fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; + break; + } + spin_unlock_irqrestore(shost->host_lock, flags); +} + +/** + * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout + * @rport: rport struct + * @timeout: timeout value + * + * Return value: + * none + **/ +static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) +{ + if (timeout) + rport->dev_loss_tmo = timeout; + else + rport->dev_loss_tmo = 1; +} + +/** + * ibmvfc_get_starget_node_name - Get SCSI target's node name + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_node_name(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; +} + +/** + * ibmvfc_get_starget_port_name - Get SCSI target's port name + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_port_name(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; +} + +/** + * ibmvfc_get_starget_port_id - Get SCSI target's port ID + * @starget: scsi target struct + * + * Return value: + * none + **/ +static void ibmvfc_get_starget_port_id(struct scsi_target *starget) +{ + struct ibmvfc_target *tgt = ibmvfc_find_target(starget); + fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; +} + +/** + * ibmvfc_wait_while_resetting - Wait while the host resets + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) +{ + long timeout = wait_event_timeout(vhost->init_wait_q, + (vhost->state == IBMVFC_ACTIVE || + vhost->state == IBMVFC_HOST_OFFLINE || + vhost->state == IBMVFC_LINK_DEAD), + (init_timeout * HZ)); + + return timeout ? 0 : -EIO; +} + +/** + * ibmvfc_issue_fc_host_lip - Re-initiate link initialization + * @shost: scsi host struct + * + * Return value: + * 0 on success / other on failure + **/ +static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) +{ + struct ibmvfc_host *vhost = shost_priv(shost); + + dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); + ibmvfc_reset_host(vhost); + return ibmvfc_wait_while_resetting(vhost); +} + +/** + * ibmvfc_gather_partition_info - Gather info about the LPAR + * + * Return value: + * none + **/ +static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) +{ + struct device_node *rootdn; + const char *name; + const unsigned int *num; + + rootdn = of_find_node_by_path("/"); + if (!rootdn) + return; + + name = of_get_property(rootdn, "ibm,partition-name", NULL); + if (name) + strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); + num = of_get_property(rootdn, "ibm,partition-no", NULL); + if (num) + vhost->partition_number = *num; + of_node_put(rootdn); +} + +/** + * ibmvfc_set_login_info - Setup info for NPIV login + * @vhost: ibmvfc host struct + * + * Return value: + * none + **/ +static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) +{ + struct ibmvfc_npiv_login *login_info = &vhost->login_info; + struct device_node *of_node = vhost->dev->archdata.of_node; + const char *location; + + memset(login_info, 0, sizeof(*login_info)); + + login_info->ostype = IBMVFC_OS_LINUX; + login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; + login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); + login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); + login_info->partition_num = vhost->partition_number; + login_info->vfc_frame_version = 1; + login_info->fcp_version = 3; + if (vhost->client_migrated) + login_info->flags = IBMVFC_CLIENT_MIGRATED; + + login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; + login_info->capabilities = IBMVFC_CAN_MIGRATE; + login_info->async.va = vhost->async_crq.msg_token; + login_info->async.len = vhost->async_crq.size; + strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); + strncpy(login_info->device_name, + vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); + + location = of_get_property(of_node, "ibm,loc-code", NULL); + location = location ? location : vhost->dev->bus_id; + strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); +} + +/** + * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host + * @vhost: ibmvfc host who owns the event pool + * + * Returns zero on success. + **/ +static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) +{ + int i; + struct ibmvfc_event_pool *pool = &vhost->pool; + + ENTER; + pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; + pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); + if (!pool->events) + return -ENOMEM; + + pool->iu_storage = dma_alloc_coherent(vhost->dev, + pool->size * sizeof(*pool->iu_storage), + &pool->iu_token, 0); + + if (!pool->iu_storage) { + kfree(pool->events); + return -ENOMEM; + } + + for (i = 0; i < pool->size; ++i) { + struct ibmvfc_event *evt = &pool->events[i]; + atomic_set(&evt->free, 1); + evt->crq.valid = 0x80; + evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); + evt->xfer_iu = pool->iu_storage + i; + evt->vhost = vhost; + evt->ext_list = NULL; + list_add_tail(&evt->queue, &vhost->free); + } + + LEAVE; + return 0; +} + +/** + * ibmvfc_free_event_pool - Frees memory of the event pool of a host + * @vhost: ibmvfc host who owns the event pool + * + **/ +static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) +{ + int i; + struct ibmvfc_event_pool *pool = &vhost->pool; + + ENTER; + for (i = 0; i < pool->size; ++i) { + list_del(&pool->events[i].queue); + BUG_ON(atomic_read(&pool->events[i].free) != 1); + if (pool->events[i].ext_list) + dma_pool_free(vhost->sg_pool, + pool->events[i].ext_list, + pool->events[i].ext_list_token); + } + + kfree(pool->events); + dma_free_coherent(vhost->dev, + pool->size * sizeof(*pool->iu_storage), + pool->iu_storage, pool->iu_token); + LEAVE; +} + +/** + * ibmvfc_get_event - Gets the next free event in pool + * @vhost: ibmvfc host struct + * + * Returns a free event from the pool. + **/ +static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) +{ + struct ibmvfc_event *evt; + + BUG_ON(list_empty(&vhost->free)); + evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); + atomic_set(&evt->free, 0); + list_del(&evt->queue); + return evt; +} + +/** + * ibmvfc_init_event - Initialize fields in an event struct that are always + * required. + * @evt: The event + * @done: Routine to call when the event is responded to + * @format: SRP or MAD format + **/ +static void ibmvfc_init_event(struct ibmvfc_event *evt, + void (*done) (struct ibmvfc_event *), u8 format) +{ + evt->cmnd = NULL; + evt->sync_iu = NULL; + evt->crq.format = format; + evt->done = done; +} + +/** + * ibmvfc_map_sg_list - Initialize scatterlist + * @scmd: scsi command struct + * @nseg: number of scatterlist segments + * @md: memory descriptor list to initialize + **/ +static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, + struct srp_direct_buf *md) +{ + int i; + struct scatterlist *sg; + + scsi_for_each_sg(scmd, sg, nseg, i) { + md[i].va = sg_dma_address(sg); + md[i].len = sg_dma_len(sg); + md[i].key = 0; + } +} + +/** + * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields + * @scmd: Scsi_Cmnd with the scatterlist + * @evt: ibmvfc event struct + * @vfc_cmd: vfc_cmd that contains the memory descriptor + * @dev: device for which to map dma memory + * + * Returns: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, + struct ibmvfc_event *evt, + struct ibmvfc_cmd *vfc_cmd, struct device *dev) +{ + + int sg_mapped; + struct srp_direct_buf *data = &vfc_cmd->ioba; + struct ibmvfc_host *vhost = dev_get_drvdata(dev); + + sg_mapped = scsi_dma_map(scmd); + if (!sg_mapped) { + vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; + return 0; + } else if (unlikely(sg_mapped < 0)) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); + return sg_mapped; + } + + if (scmd->sc_data_direction == DMA_TO_DEVICE) { + vfc_cmd->flags |= IBMVFC_WRITE; + vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; + } else { + vfc_cmd->flags |= IBMVFC_READ; + vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; + } + + if (sg_mapped == 1) { + ibmvfc_map_sg_list(scmd, sg_mapped, data); + return 0; + } + + vfc_cmd->flags |= IBMVFC_SCATTERLIST; + + if (!evt->ext_list) { + evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, + &evt->ext_list_token); + + if (!evt->ext_list) { + scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); + return -ENOMEM; + } + } + + ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); + + data->va = evt->ext_list_token; + data->len = sg_mapped * sizeof(struct srp_direct_buf); + data->key = 0; + return 0; +} + +/** + * ibmvfc_timeout - Internal command timeout handler + * @evt: struct ibmvfc_event that timed out + * + * Called when an internally generated command times out + **/ +static void ibmvfc_timeout(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); + ibmvfc_reset_host(vhost); +} + +/** + * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() + * @evt: event to be sent + * @vhost: ibmvfc host struct + * @timeout: timeout in seconds - 0 means do not time command + * + * Returns the value returned from ibmvfc_send_crq(). (Zero for success) + **/ +static int ibmvfc_send_event(struct ibmvfc_event *evt, + struct ibmvfc_host *vhost, unsigned long timeout) +{ + u64 *crq_as_u64 = (u64 *) &evt->crq; + int rc; + + /* Copy the IU into the transfer area */ + *evt->xfer_iu = evt->iu; + if (evt->crq.format == IBMVFC_CMD_FORMAT) + evt->xfer_iu->cmd.tag = (u64)evt; + else if (evt->crq.format == IBMVFC_MAD_FORMAT) + evt->xfer_iu->mad_common.tag = (u64)evt; + else + BUG(); + + list_add_tail(&evt->queue, &vhost->sent); + init_timer(&evt->timer); + + if (timeout) { + evt->timer.data = (unsigned long) evt; + evt->timer.expires = jiffies + (timeout * HZ); + evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; + add_timer(&evt->timer); + } + + if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { + list_del(&evt->queue); + del_timer(&evt->timer); + + /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. + * Firmware will send a CRQ with a transport event (0xFF) to + * tell this client what has happened to the transport. This + * will be handled in ibmvfc_handle_crq() + */ + if (rc == H_CLOSED) { + if (printk_ratelimit()) + dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); + if (evt->cmnd) + scsi_dma_unmap(evt->cmnd); + ibmvfc_free_event(evt); + return SCSI_MLQUEUE_HOST_BUSY; + } + + dev_err(vhost->dev, "Send error (rc=%d)\n", rc); + if (evt->cmnd) { + evt->cmnd->result = DID_ERROR << 16; + evt->done = ibmvfc_scsi_eh_done; + } else + evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; + + evt->done(evt); + } else + ibmvfc_trc_start(evt); + + return 0; +} + +/** + * ibmvfc_log_error - Log an error for the failed command if appropriate + * @evt: ibmvfc event to log + * + **/ +static void ibmvfc_log_error(struct ibmvfc_event *evt) +{ + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + struct scsi_cmnd *cmnd = evt->cmnd; + const char *err = unknown_error; + int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); + int logerr = 0; + int rsp_code = 0; + + if (index >= 0) { + logerr = cmd_status[index].log; + err = cmd_status[index].name; + } + + if (!logerr && (vhost->log_level <= IBMVFC_DEFAULT_LOG_LEVEL)) + return; + + if (rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = rsp->data.info.rsp_code; + + scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", + cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, + rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); +} + +/** + * ibmvfc_scsi_done - Handle responses from commands + * @evt: ibmvfc event to be handled + * + * Used as a callback when sending scsi cmds. + **/ +static void ibmvfc_scsi_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; + struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; + struct scsi_cmnd *cmnd = evt->cmnd; + int rsp_len = 0; + int sense_len = rsp->fcp_sense_len; + + if (cmnd) { + if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) + scsi_set_resid(cmnd, vfc_cmd->adapter_resid); + else if (rsp->flags & FCP_RESID_UNDER) + scsi_set_resid(cmnd, rsp->fcp_resid); + else + scsi_set_resid(cmnd, 0); + + if (vfc_cmd->status) { + cmnd->result = ibmvfc_get_err_result(vfc_cmd); + + if (rsp->flags & FCP_RSP_LEN_VALID) + rsp_len = rsp->fcp_rsp_len; + if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) + sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; + if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len) + memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); + + ibmvfc_log_error(evt); + } + + if (!cmnd->result && + (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) + cmnd->result = (DID_ERROR << 16); + + scsi_dma_unmap(cmnd); + cmnd->scsi_done(cmnd); + } + + ibmvfc_free_event(evt); +} + +/** + * ibmvfc_host_chkready - Check if the host can accept commands + * @vhost: struct ibmvfc host + * + * Returns: + * 1 if host can accept command / 0 if not + **/ +static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) +{ + int result = 0; + + switch (vhost->state) { + case IBMVFC_LINK_DEAD: + case IBMVFC_HOST_OFFLINE: + result = DID_NO_CONNECT << 16; + break; + case IBMVFC_NO_CRQ: + case IBMVFC_INITIALIZING: + case IBMVFC_HALTED: + case IBMVFC_LINK_DOWN: + result = DID_REQUEUE << 16; + break; + case IBMVFC_ACTIVE: + result = 0; + break; + }; + + return result; +} + +/** + * ibmvfc_queuecommand - The queuecommand function of the scsi template + * @cmnd: struct scsi_cmnd to be executed + * @done: Callback function to be called when cmnd is completed + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, + void (*done) (struct scsi_cmnd *)) +{ + struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + struct ibmvfc_cmd *vfc_cmd; + struct ibmvfc_event *evt; + u8 tag[2]; + int rc; + + if (unlikely((rc = fc_remote_port_chkready(rport))) || + unlikely((rc = ibmvfc_host_chkready(vhost)))) { + cmnd->result = rc; + done(cmnd); + return 0; + } + + cmnd->result = (DID_OK << 16); + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); + evt->cmnd = cmnd; + cmnd->scsi_done = done; + vfc_cmd = &evt->iu.cmd; + memset(vfc_cmd, 0, sizeof(*vfc_cmd)); + vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); + vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; + vfc_cmd->payload_len = sizeof(vfc_cmd->iu); + vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); + vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; + vfc_cmd->tgt_scsi_id = rport->port_id; + if ((rport->supported_classes & FC_COS_CLASS3) && + (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) + vfc_cmd->flags = IBMVFC_CLASS_3_ERR; + vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); + int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); + memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); + + if (scsi_populate_tag_msg(cmnd, tag)) { + vfc_cmd->task_tag = tag[1]; + switch (tag[0]) { + case MSG_SIMPLE_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; + break; + case MSG_HEAD_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; + break; + case MSG_ORDERED_TAG: + vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; + break; + }; + } + + if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) + return ibmvfc_send_event(evt, vhost, 0); + + ibmvfc_free_event(evt); + if (rc == -ENOMEM) + return SCSI_MLQUEUE_HOST_BUSY; + + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + scmd_printk(KERN_ERR, cmnd, + "Failed to map DMA buffer for command. rc=%d\n", rc); + + cmnd->result = DID_ERROR << 16; + done(cmnd); + return 0; +} + +/** + * ibmvfc_sync_completion - Signal that a synchronous command has completed + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_sync_completion(struct ibmvfc_event *evt) +{ + /* copy the response back */ + if (evt->sync_iu) + *evt->sync_iu = *evt->xfer_iu; + + complete(&evt->comp); +} + +/** + * ibmvfc_reset_device - Reset the device with the specified reset type + * @sdev: scsi device to reset + * @type: reset type + * @desc: reset type description for log messages + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_cmd *tmf; + struct ibmvfc_event *evt; + union ibmvfc_iu rsp_iu; + struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + int rsp_code = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); + + tmf = &evt->iu.cmd; + memset(tmf, 0, sizeof(*tmf)); + tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + tmf->resp.len = sizeof(tmf->rsp); + tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; + tmf->payload_len = sizeof(tmf->iu); + tmf->resp_len = sizeof(tmf->rsp); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->tgt_scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->iu.lun); + tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); + tmf->iu.tmf_flags = type; + evt->sync_iu = &rsp_iu; + + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", + desc, rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); + wait_for_completion(&evt->comp); + + if (rsp_iu.cmd.status) { + if (fc_rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = fc_rsp->data.info.rsp_code; + + sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, scsi_status: %x\n", + desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), + rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, + fc_rsp->scsi_status); + rsp_rc = -EIO; + } else + sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rsp_rc; +} + +/** + * ibmvfc_abort_task_set - Abort outstanding commands to the device + * @sdev: scsi device to abort commands + * + * This sends an Abort Task Set to the VIOS for the specified device. This does + * NOT send any cancel to the VIOS. That must be done separately. + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_abort_task_set(struct scsi_device *sdev) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_cmd *tmf; + struct ibmvfc_event *evt, *found_evt; + union ibmvfc_iu rsp_iu; + struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + int rsp_code = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + found_evt = NULL; + list_for_each_entry(evt, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == sdev) { + found_evt = evt; + break; + } + } + + if (!found_evt) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; + } + + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); + + tmf = &evt->iu.cmd; + memset(tmf, 0, sizeof(*tmf)); + tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); + tmf->resp.len = sizeof(tmf->rsp); + tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; + tmf->payload_len = sizeof(tmf->iu); + tmf->resp_len = sizeof(tmf->rsp); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->tgt_scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->iu.lun); + tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); + tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; + evt->sync_iu = &rsp_iu; + + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); + wait_for_completion(&evt->comp); + + if (rsp_iu.cmd.status) { + if (fc_rsp->flags & FCP_RSP_LEN_VALID) + rsp_code = fc_rsp->data.info.rsp_code; + + sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " + "flags: %x fcp_rsp: %x, scsi_status: %x\n", + ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), + rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, + fc_rsp->scsi_status); + rsp_rc = -EIO; + } else + sdev_printk(KERN_INFO, sdev, "Abort successful\n"); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rsp_rc; +} + +/** + * ibmvfc_cancel_all - Cancel all outstanding commands to the device + * @sdev: scsi device to cancel commands + * @type: type of error recovery being performed + * + * This sends a cancel to the VIOS for the specified device. This does + * NOT send any abort to the actual device. That must be done separately. + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) +{ + struct ibmvfc_host *vhost = shost_priv(sdev->host); + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_tmf *tmf; + struct ibmvfc_event *evt, *found_evt; + union ibmvfc_iu rsp; + int rsp_rc = -EBUSY; + unsigned long flags; + u16 status; + + ENTER; + spin_lock_irqsave(vhost->host->host_lock, flags); + found_evt = NULL; + list_for_each_entry(evt, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == sdev) { + found_evt = evt; + break; + } + } + + if (!found_evt) { + if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) + sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; + } + + if (vhost->state == IBMVFC_ACTIVE) { + evt = ibmvfc_get_event(vhost); + ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); + + tmf = &evt->iu.tmf; + memset(tmf, 0, sizeof(*tmf)); + tmf->common.version = 1; + tmf->common.opcode = IBMVFC_TMF_MAD; + tmf->common.length = sizeof(*tmf); + tmf->scsi_id = rport->port_id; + int_to_scsilun(sdev->lun, &tmf->lun); + tmf->flags = (type | IBMVFC_TMF_LUA_VALID); + tmf->cancel_key = (unsigned long)sdev->hostdata; + tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata); + + evt->sync_iu = &rsp; + init_completion(&evt->comp); + rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (rsp_rc != 0) { + sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); + + wait_for_completion(&evt->comp); + status = rsp.mad_common.status; + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_free_event(evt); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + if (status != IBMVFC_MAD_SUCCESS) { + sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); + return -EIO; + } + + sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); + return 0; +} + +/** + * ibmvfc_eh_abort_handler - Abort a command + * @cmd: scsi command to abort + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct ibmvfc_event *evt, *pos; + int cancel_rc, abort_rc; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET); + abort_rc = ibmvfc_abort_task_set(cmd->device); + + if (!cancel_rc && !abort_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == cmd->device) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_eh_device_reset_handler - Reset a single LUN + * @cmd: scsi command struct + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct ibmvfc_event *evt, *pos; + int cancel_rc, reset_rc; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET); + reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN"); + + if (!cancel_rc && !reset_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && evt->cmnd->device == cmd->device) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_dev_cancel_all - Device iterated cancel all function + * @sdev: scsi device struct + * @data: return code + * + **/ +static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) +{ + unsigned long *rc = data; + *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); +} + +/** + * ibmvfc_dev_abort_all - Device iterated abort task set function + * @sdev: scsi device struct + * @data: return code + * + **/ +static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) +{ + unsigned long *rc = data; + *rc |= ibmvfc_abort_task_set(sdev); +} + +/** + * ibmvfc_eh_target_reset_handler - Reset the target + * @cmd: scsi command struct + * + * Returns: + * SUCCESS / FAILED + **/ +static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) +{ + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + struct scsi_target *starget = scsi_target(cmd->device); + struct ibmvfc_event *evt, *pos; + int reset_rc; + unsigned long cancel_rc = 0; + unsigned long flags; + + ENTER; + ibmvfc_wait_while_resetting(vhost); + starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); + reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target"); + + if (!cancel_rc && !reset_rc) { + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + LEAVE; + return SUCCESS; + } + + LEAVE; + return FAILED; +} + +/** + * ibmvfc_eh_host_reset_handler - Reset the connection to the server + * @cmd: struct scsi_cmnd having problems + * + **/ +static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) +{ + int rc; + struct ibmvfc_host *vhost = shost_priv(cmd->device->host); + + dev_err(vhost->dev, "Resetting connection due to error recovery\n"); + rc = ibmvfc_issue_fc_host_lip(vhost->host); + return rc ? FAILED : SUCCESS; +} + +/** + * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. + * @rport: rport struct + * + * Return value: + * none + **/ +static void ibmvfc_terminate_rport_io(struct fc_rport *rport) +{ + struct scsi_target *starget = to_scsi_target(&rport->dev); + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct ibmvfc_host *vhost = shost_priv(shost); + struct ibmvfc_event *evt, *pos; + unsigned long cancel_rc = 0; + unsigned long abort_rc = 0; + unsigned long flags; + + ENTER; + starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); + starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); + + if (!cancel_rc && !abort_rc) { + spin_lock_irqsave(shost->host_lock, flags); + list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { + if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) + ibmvfc_fail_request(evt, DID_ABORT); + } + spin_unlock_irqrestore(shost->host_lock, flags); + } else + ibmvfc_issue_fc_host_lip(shost); + + scsi_target_unblock(&rport->dev); + LEAVE; +} + +static const struct { + enum ibmvfc_async_event ae; + const char *desc; +} ae_desc [] = { + { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, + { IBMVFC_AE_ELS_LOGO, "LOGO" }, + { IBMVFC_AE_ELS_PRLO, "PRLO" }, + { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, + { IBMVFC_AE_SCN_GROUP, "Group SCN" }, + { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, + { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, + { IBMVFC_AE_LINK_UP, "Link Up" }, + { IBMVFC_AE_LINK_DOWN, "Link Down" }, + { IBMVFC_AE_LINK_DEAD, "Link Dead" }, + { IBMVFC_AE_HALT, "Halt" }, + { IBMVFC_AE_RESUME, "Resume" }, + { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, +}; + +static const char *unknown_ae = "Unknown async"; + +/** + * ibmvfc_get_ae_desc - Get text description for async event + * @ae: async event + * + **/ +static const char *ibmvfc_get_ae_desc(u64 ae) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ae_desc); i++) + if (ae_desc[i].ae == ae) + return ae_desc[i].desc; + + return unknown_ae; +} + +/** + * ibmvfc_handle_async - Handle an async event from the adapter + * @crq: crq to process + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, + struct ibmvfc_host *vhost) +{ + const char *desc = ibmvfc_get_ae_desc(crq->event); + + ibmvfc_log(vhost, 2, "%s event received\n", desc); + + switch (crq->event) { + case IBMVFC_AE_LINK_UP: + case IBMVFC_AE_RESUME: + vhost->events_to_log |= IBMVFC_AE_LINKUP; + ibmvfc_init_host(vhost); + break; + case IBMVFC_AE_SCN_FABRIC: + vhost->events_to_log |= IBMVFC_AE_RSCN; + ibmvfc_init_host(vhost); + break; + case IBMVFC_AE_SCN_NPORT: + case IBMVFC_AE_SCN_GROUP: + case IBMVFC_AE_SCN_DOMAIN: + vhost->events_to_log |= IBMVFC_AE_RSCN; + case IBMVFC_AE_ELS_LOGO: + case IBMVFC_AE_ELS_PRLO: + case IBMVFC_AE_ELS_PLOGI: + ibmvfc_reinit_host(vhost); + break; + case IBMVFC_AE_LINK_DOWN: + case IBMVFC_AE_ADAPTER_FAILED: + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + break; + case IBMVFC_AE_LINK_DEAD: + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + break; + case IBMVFC_AE_HALT: + ibmvfc_link_down(vhost, IBMVFC_HALTED); + break; + default: + dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); + break; + }; +} + +/** + * ibmvfc_handle_crq - Handles and frees received events in the CRQ + * @crq: Command/Response queue + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) +{ + long rc; + struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; + + switch (crq->valid) { + case IBMVFC_CRQ_INIT_RSP: + switch (crq->format) { + case IBMVFC_CRQ_INIT: + dev_info(vhost->dev, "Partner initialized\n"); + /* Send back a response */ + rc = ibmvfc_send_crq_init_complete(vhost); + if (rc == 0) + ibmvfc_init_host(vhost); + else + dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); + break; + case IBMVFC_CRQ_INIT_COMPLETE: + dev_info(vhost->dev, "Partner initialization complete\n"); + ibmvfc_init_host(vhost); + break; + default: + dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); + } + return; + case IBMVFC_CRQ_XPORT_EVENT: + vhost->state = IBMVFC_NO_CRQ; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + if (crq->format == IBMVFC_PARTITION_MIGRATED) { + /* We need to re-setup the interpartition connection */ + dev_info(vhost->dev, "Re-enabling adapter\n"); + vhost->client_migrated = 1; + ibmvfc_purge_requests(vhost, DID_REQUEUE); + if ((rc = ibmvfc_reenable_crq_queue(vhost)) || + (rc = ibmvfc_send_crq_init(vhost))) { + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + } else { + dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); + + ibmvfc_purge_requests(vhost, DID_ERROR); + if ((rc = ibmvfc_reset_crq(vhost)) || + (rc = ibmvfc_send_crq_init(vhost))) { + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); + } else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); + } + return; + case IBMVFC_CRQ_CMD_RSP: + break; + default: + dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); + return; + } + + if (crq->format == IBMVFC_ASYNC_EVENT) + return; + + /* The only kind of payload CRQs we should get are responses to + * things we send. Make sure this response is to something we + * actually sent + */ + if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { + dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", + crq->ioba); + return; + } + + if (unlikely(atomic_read(&evt->free))) { + dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", + crq->ioba); + return; + } + + del_timer(&evt->timer); + list_del(&evt->queue); + ibmvfc_trc_end(evt); + evt->done(evt); +} + +/** + * ibmvfc_scan_finished - Check if the device scan is done. + * @shost: scsi host struct + * @time: current elapsed time + * + * Returns: + * 0 if scan is not done / 1 if scan is done + **/ +static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) +{ + unsigned long flags; + struct ibmvfc_host *vhost = shost_priv(shost); + int done = 0; + + spin_lock_irqsave(shost->host_lock, flags); + if (time >= (init_timeout * HZ)) { + dev_info(vhost->dev, "Scan taking longer than %d seconds, " + "continuing initialization\n", init_timeout); + done = 1; + } + + if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) + done = 1; + spin_unlock_irqrestore(shost->host_lock, flags); + return done; +} + +/** + * ibmvfc_slave_alloc - Setup the device's task set value + * @sdev: struct scsi_device device to configure + * + * Set the device's task set value so that error handling works as + * expected. + * + * Returns: + * 0 on success / -ENXIO if device does not exist + **/ +static int ibmvfc_slave_alloc(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = sdev->host; + struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + + if (!rport || fc_remote_port_chkready(rport)) + return -ENXIO; + + spin_lock_irqsave(shost->host_lock, flags); + sdev->hostdata = (void *)(unsigned long)vhost->task_set++; + spin_unlock_irqrestore(shost->host_lock, flags); + return 0; +} + +/** + * ibmvfc_slave_configure - Configure the device + * @sdev: struct scsi_device device to configure + * + * Enable allow_restart for a device if it is a disk. Adjust the + * queue_depth here also. + * + * Returns: + * 0 + **/ +static int ibmvfc_slave_configure(struct scsi_device *sdev) +{ + struct Scsi_Host *shost = sdev->host; + struct fc_rport *rport = starget_to_rport(sdev->sdev_target); + unsigned long flags = 0; + + spin_lock_irqsave(shost->host_lock, flags); + if (sdev->type == TYPE_DISK) + sdev->allow_restart = 1; + + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); + scsi_activate_tcq(sdev, sdev->queue_depth); + } else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + + rport->dev_loss_tmo = dev_loss_tmo; + spin_unlock_irqrestore(shost->host_lock, flags); + return 0; +} + +/** + * ibmvfc_change_queue_depth - Change the device's queue depth + * @sdev: scsi device struct + * @qdepth: depth to set + * + * Return value: + * actual depth set + **/ +static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) +{ + if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) + qdepth = IBMVFC_MAX_CMDS_PER_LUN; + + scsi_adjust_queue_depth(sdev, 0, qdepth); + return sdev->queue_depth; +} + +/** + * ibmvfc_change_queue_type - Change the device's queue type + * @sdev: scsi device struct + * @tag_type: type of tags to use + * + * Return value: + * actual queue type set + **/ +static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) +{ + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, tag_type); + + if (tag_type) + scsi_activate_tcq(sdev, sdev->queue_depth); + else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + } else + tag_type = 0; + + return tag_type; +} + +static ssize_t ibmvfc_show_host_partition_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.partition_name); +} + +static struct device_attribute ibmvfc_host_partition_name = { + .attr = { + .name = "partition_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_partition_name, +}; + +static ssize_t ibmvfc_show_host_device_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.device_name); +} + +static struct device_attribute ibmvfc_host_device_name = { + .attr = { + .name = "device_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_device_name, +}; + +static ssize_t ibmvfc_show_host_loc_code(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.port_loc_code); +} + +static struct device_attribute ibmvfc_host_loc_code = { + .attr = { + .name = "port_loc_code", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_loc_code, +}; + +static ssize_t ibmvfc_show_host_drc_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + + return snprintf(buf, PAGE_SIZE, "%s\n", + vhost->login_buf->resp.drc_name); +} + +static struct device_attribute ibmvfc_host_drc_name = { + .attr = { + .name = "drc_name", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_drc_name, +}; + +static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); +} + +static struct device_attribute ibmvfc_host_npiv_version = { + .attr = { + .name = "npiv_version", + .mode = S_IRUGO, + }, + .show = ibmvfc_show_host_npiv_version, +}; + +/** + * ibmvfc_show_log_level - Show the adapter's error logging level + * @dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_show_log_level(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + int len; + + spin_lock_irqsave(shost->host_lock, flags); + len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); + spin_unlock_irqrestore(shost->host_lock, flags); + return len; +} + +/** + * ibmvfc_store_log_level - Change the adapter's error logging level + * @dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_store_log_level(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + + spin_lock_irqsave(shost->host_lock, flags); + vhost->log_level = simple_strtoul(buf, NULL, 10); + spin_unlock_irqrestore(shost->host_lock, flags); + return strlen(buf); +} + +static struct device_attribute ibmvfc_log_level_attr = { + .attr = { + .name = "log_level", + .mode = S_IRUGO | S_IWUSR, + }, + .show = ibmvfc_show_log_level, + .store = ibmvfc_store_log_level +}; + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +/** + * ibmvfc_read_trace - Dump the adapter trace + * @kobj: kobject struct + * @bin_attr: bin_attribute struct + * @buf: buffer + * @off: offset + * @count: buffer size + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ibmvfc_read_trace(struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct Scsi_Host *shost = class_to_shost(dev); + struct ibmvfc_host *vhost = shost_priv(shost); + unsigned long flags = 0; + int size = IBMVFC_TRACE_SIZE; + char *src = (char *)vhost->trace; + + if (off > size) + return 0; + if (off + count > size) { + size -= off; + count = size; + } + + spin_lock_irqsave(shost->host_lock, flags); + memcpy(buf, &src[off], count); + spin_unlock_irqrestore(shost->host_lock, flags); + return count; +} + +static struct bin_attribute ibmvfc_trace_attr = { + .attr = { + .name = "trace", + .mode = S_IRUGO, + }, + .size = 0, + .read = ibmvfc_read_trace, +}; +#endif + +static struct device_attribute *ibmvfc_attrs[] = { + &ibmvfc_host_partition_name, + &ibmvfc_host_device_name, + &ibmvfc_host_loc_code, + &ibmvfc_host_drc_name, + &ibmvfc_host_npiv_version, + &ibmvfc_log_level_attr, + NULL +}; + +static struct scsi_host_template driver_template = { + .module = THIS_MODULE, + .name = "IBM POWER Virtual FC Adapter", + .proc_name = IBMVFC_NAME, + .queuecommand = ibmvfc_queuecommand, + .eh_abort_handler = ibmvfc_eh_abort_handler, + .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, + .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, + .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, + .slave_alloc = ibmvfc_slave_alloc, + .slave_configure = ibmvfc_slave_configure, + .scan_finished = ibmvfc_scan_finished, + .change_queue_depth = ibmvfc_change_queue_depth, + .change_queue_type = ibmvfc_change_queue_type, + .cmd_per_lun = 16, + .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, + .this_id = -1, + .sg_tablesize = SG_ALL, + .max_sectors = IBMVFC_MAX_SECTORS, + .use_clustering = ENABLE_CLUSTERING, + .shost_attrs = ibmvfc_attrs, +}; + +/** + * ibmvfc_next_async_crq - Returns the next entry in async queue + * @vhost: ibmvfc host struct + * + * Returns: + * Pointer to next entry in queue / NULL if empty + **/ +static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; + struct ibmvfc_async_crq *crq; + + crq = &async_crq->msgs[async_crq->cur]; + if (crq->valid & 0x80) { + if (++async_crq->cur == async_crq->size) + async_crq->cur = 0; + } else + crq = NULL; + + return crq; +} + +/** + * ibmvfc_next_crq - Returns the next entry in message queue + * @vhost: ibmvfc host struct + * + * Returns: + * Pointer to next entry in queue / NULL if empty + **/ +static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) +{ + struct ibmvfc_crq_queue *queue = &vhost->crq; + struct ibmvfc_crq *crq; + + crq = &queue->msgs[queue->cur]; + if (crq->valid & 0x80) { + if (++queue->cur == queue->size) + queue->cur = 0; + } else + crq = NULL; + + return crq; +} + +/** + * ibmvfc_interrupt - Interrupt handler + * @irq: number of irq to handle, not used + * @dev_instance: ibmvfc_host that received interrupt + * + * Returns: + * IRQ_HANDLED + **/ +static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) +{ + struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; + struct vio_dev *vdev = to_vio_dev(vhost->dev); + struct ibmvfc_crq *crq; + struct ibmvfc_async_crq *async; + unsigned long flags; + int done = 0; + + spin_lock_irqsave(vhost->host->host_lock, flags); + vio_disable_interrupts(to_vio_dev(vhost->dev)); + while (!done) { + /* Pull all the valid messages off the CRQ */ + while ((crq = ibmvfc_next_crq(vhost)) != NULL) { + ibmvfc_handle_crq(crq, vhost); + crq->valid = 0; + } + + /* Pull all the valid messages off the async CRQ */ + while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { + ibmvfc_handle_async(async, vhost); + async->valid = 0; + } + + vio_enable_interrupts(vdev); + if ((crq = ibmvfc_next_crq(vhost)) != NULL) { + vio_disable_interrupts(vdev); + ibmvfc_handle_crq(crq, vhost); + crq->valid = 0; + } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { + vio_disable_interrupts(vdev); + ibmvfc_handle_async(async, vhost); + crq->valid = 0; + } else + done = 1; + } + + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return IRQ_HANDLED; +} + +/** + * ibmvfc_init_tgt - Set the next init job step for the target + * @tgt: ibmvfc target struct + * @job_step: job step to perform + * + **/ +static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, + void (*job_step) (struct ibmvfc_target *)) +{ + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); + tgt->job_step = job_step; + wake_up(&tgt->vhost->work_wait_q); +} + +/** + * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization + * @tgt: ibmvfc target struct + * @job_step: initialization job step + * + **/ +static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, + void (*job_step) (struct ibmvfc_target *)) +{ + if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + wake_up(&tgt->vhost->work_wait_q); + } else + ibmvfc_init_tgt(tgt, job_step); +} + +/** + * ibmvfc_release_tgt - Free memory allocated for a target + * @kref: kref struct + * + **/ +static void ibmvfc_release_tgt(struct kref *kref) +{ + struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); + kfree(tgt); +} + +/** + * ibmvfc_tgt_prli_done - Completion handler for Process Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Process Login succeeded\n"); + tgt->need_login = 0; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), + rsp->status, rsp->error, status); + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_send_prli - Send a process login + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) +{ + struct ibmvfc_process_login *prli; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + prli = &evt->iu.prli; + memset(prli, 0, sizeof(*prli)); + prli->common.version = 1; + prli->common.opcode = IBMVFC_PROCESS_LOGIN; + prli->common.length = sizeof(*prli); + prli->scsi_id = tgt->scsi_id; + + prli->parms.type = IBMVFC_SCSI_FCP_TYPE; + prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; + prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent process login\n"); +} + +/** + * ibmvfc_tgt_plogi_done - Completion handler for Port Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Port Login succeeded\n"); + if (tgt->ids.port_name && + tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { + vhost->reinit = 1; + tgt_dbg(tgt, "Port re-init required\n"); + break; + } + tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); + tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); + tgt->ids.port_id = tgt->scsi_id; + tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; + memcpy(&tgt->service_parms, &rsp->service_parms, + sizeof(tgt->service_parms)); + memcpy(&tgt->service_parms_change, &rsp->service_parms_change, + sizeof(tgt->service_parms_change)); + ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, + ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, + ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); + + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) +{ + struct ibmvfc_port_login *plogi; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + plogi = &evt->iu.plogi; + memset(plogi, 0, sizeof(*plogi)); + plogi->common.version = 1; + plogi->common.opcode = IBMVFC_PORT_LOGIN; + plogi->common.length = sizeof(*plogi); + plogi->scsi_id = tgt->scsi_id; + + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent port login\n"); +} + +/** + * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_free_event(evt); + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Implicit Logout succeeded\n"); + break; + case IBMVFC_MAD_DRIVER_FAILED: + kref_put(&tgt->kref, ibmvfc_release_tgt); + wake_up(&vhost->work_wait_q); + return; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); + break; + }; + + if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); + else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && + tgt->scsi_id != tgt->new_scsi_id) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + kref_put(&tgt->kref, ibmvfc_release_tgt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) +{ + struct ibmvfc_implicit_logout *mad; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); + evt->tgt = tgt; + mad = &evt->iu.implicit_logout; + memset(mad, 0, sizeof(*mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; + mad->common.length = sizeof(*mad); + mad->old_scsi_id = tgt->scsi_id; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent Implicit Logout\n"); +} + +/** + * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_target *tgt = evt->tgt; + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; + u32 status = rsp->common.status; + + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + switch (status) { + case IBMVFC_MAD_SUCCESS: + tgt_dbg(tgt, "Query Target succeeded\n"); + tgt->new_scsi_id = rsp->scsi_id; + if (rsp->scsi_id != tgt->scsi_id) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); + break; + case IBMVFC_MAD_FAILED: + default: + tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, + ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, + ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); + + if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && + rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && + rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); + else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); + break; + }; + + kref_put(&tgt->kref, ibmvfc_release_tgt); + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_tgt_query_target - Initiate a Query Target for specified target + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) +{ + struct ibmvfc_query_tgt *query_tgt; + struct ibmvfc_host *vhost = tgt->vhost; + struct ibmvfc_event *evt; + + if (vhost->discovery_threads >= disc_threads) + return; + + kref_get(&tgt->kref); + evt = ibmvfc_get_event(vhost); + vhost->discovery_threads++; + evt->tgt = tgt; + ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); + query_tgt = &evt->iu.query_tgt; + memset(query_tgt, 0, sizeof(*query_tgt)); + query_tgt->common.version = 1; + query_tgt->common.opcode = IBMVFC_QUERY_TARGET; + query_tgt->common.length = sizeof(*query_tgt); + query_tgt->wwpn = tgt->ids.port_name; + + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); + if (ibmvfc_send_event(evt, vhost, default_timeout)) { + vhost->discovery_threads--; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } else + tgt_dbg(tgt, "Sent Query Target\n"); +} + +/** + * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target + * @vhost: ibmvfc host struct + * @scsi_id: SCSI ID to allocate target for + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) +{ + struct ibmvfc_target *tgt; + unsigned long flags; + + spin_lock_irqsave(vhost->host->host_lock, flags); + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->scsi_id == scsi_id) { + if (tgt->need_login) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + goto unlock_out; + } + } + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); + if (!tgt) { + dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", + scsi_id); + return -ENOMEM; + } + + tgt->scsi_id = scsi_id; + tgt->new_scsi_id = scsi_id; + tgt->vhost = vhost; + tgt->need_login = 1; + kref_init(&tgt->kref); + ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); + spin_lock_irqsave(vhost->host->host_lock, flags); + list_add_tail(&tgt->queue, &vhost->targets); + +unlock_out: + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return 0; +} + +/** + * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets + * @vhost: ibmvfc host struct + * + * Returns: + * 0 on success / other on failure + **/ +static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) +{ + int i, rc; + + for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) + rc = ibmvfc_alloc_target(vhost, + vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); + + return rc; +} + +/** + * ibmvfc_discover_targets_done - Completion handler for discover targets MAD + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; + u32 mad_status = rsp->common.status; + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); + vhost->num_targets = rsp->num_written; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); + break; + case IBMVFC_MAD_FAILED: + dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); + ibmvfc_retry_host_init(vhost); + break; + case IBMVFC_MAD_DRIVER_FAILED: + break; + default: + dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + break; + } + + ibmvfc_free_event(evt); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_discover_targets - Send Discover Targets MAD + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) +{ + struct ibmvfc_discover_targets *mad; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); + mad = &evt->iu.discover_targets; + memset(mad, 0, sizeof(*mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_DISC_TARGETS; + mad->common.length = sizeof(*mad); + mad->bufflen = vhost->disc_buf_sz; + mad->buffer.va = vhost->disc_buf_dma; + mad->buffer.len = vhost->disc_buf_sz; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Sent discover targets\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); +} + +/** + * ibmvfc_npiv_login_done - Completion handler for NPIV Login + * @evt: ibmvfc event struct + * + **/ +static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + u32 mad_status = evt->xfer_iu->npiv_login.common.status; + struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; + unsigned int npiv_max_sectors; + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_free_event(evt); + break; + case IBMVFC_MAD_FAILED: + dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", + ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); + if (ibmvfc_retry_cmd(rsp->status, rsp->error)) + ibmvfc_retry_host_init(vhost); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + ibmvfc_free_event(evt); + return; + case IBMVFC_MAD_CRQ_ERROR: + ibmvfc_retry_host_init(vhost); + case IBMVFC_MAD_DRIVER_FAILED: + ibmvfc_free_event(evt); + return; + default: + dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + ibmvfc_free_event(evt); + return; + } + + vhost->client_migrated = 0; + + if (!(rsp->flags & IBMVFC_NATIVE_FC)) { + dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", + rsp->flags); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + wake_up(&vhost->work_wait_q); + return; + } + + if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { + dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", + rsp->max_cmds); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + wake_up(&vhost->work_wait_q); + return; + } + + npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); + dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", + rsp->partition_name, rsp->device_name, rsp->port_loc_code, + rsp->drc_name, npiv_max_sectors); + + fc_host_fabric_name(vhost->host) = rsp->node_name; + fc_host_node_name(vhost->host) = rsp->node_name; + fc_host_port_name(vhost->host) = rsp->port_name; + fc_host_port_id(vhost->host) = rsp->scsi_id; + fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; + fc_host_supported_classes(vhost->host) = 0; + if (rsp->service_parms.class1_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; + if (rsp->service_parms.class2_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; + if (rsp->service_parms.class3_parms[0] & 0x80000000) + fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; + fc_host_maxframe_size(vhost->host) = + rsp->service_parms.common.bb_rcv_sz & 0x0fff; + + vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; + vhost->host->max_sectors = npiv_max_sectors; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + wake_up(&vhost->work_wait_q); +} + +/** + * ibmvfc_npiv_login - Sends NPIV login + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) +{ + struct ibmvfc_npiv_login_mad *mad; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + ibmvfc_gather_partition_info(vhost); + ibmvfc_set_login_info(vhost); + ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); + + memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); + mad = &evt->iu.npiv_login; + memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); + mad->common.version = 1; + mad->common.opcode = IBMVFC_NPIV_LOGIN; + mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); + mad->buffer.va = vhost->login_buf_dma; + mad->buffer.len = sizeof(*vhost->login_buf); + + memset(vhost->async_crq.msgs, 0, PAGE_SIZE); + vhost->async_crq.cur = 0; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Sent NPIV login\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); +}; + +/** + * ibmvfc_dev_init_to_do - Is there target initialization work to do? + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT || + tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) + return 1; + } + + return 0; +} + +/** + * __ibmvfc_work_to_do - Is there task level work to do? (no locking) + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + + if (kthread_should_stop()) + return 1; + switch (vhost->action) { + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_INIT_WAIT: + return 0; + case IBMVFC_HOST_ACTION_TGT_INIT: + case IBMVFC_HOST_ACTION_QUERY_TGTS: + if (vhost->discovery_threads == disc_threads) + return 0; + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->action == IBMVFC_TGT_ACTION_INIT) + return 1; + list_for_each_entry(tgt, &vhost->targets, queue) + if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) + return 0; + return 1; + case IBMVFC_HOST_ACTION_INIT: + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + case IBMVFC_HOST_ACTION_TGT_ADD: + case IBMVFC_HOST_ACTION_TGT_DEL: + case IBMVFC_HOST_ACTION_QUERY: + default: + break; + }; + + return 1; +} + +/** + * ibmvfc_work_to_do - Is there task level work to do? + * @vhost: ibmvfc host struct + * + * Returns: + * 1 if work to do / 0 if not + **/ +static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(vhost->host->host_lock, flags); + rc = __ibmvfc_work_to_do(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + return rc; +} + +/** + * ibmvfc_log_ae - Log async events if necessary + * @vhost: ibmvfc host struct + * @events: events to log + * + **/ +static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) +{ + if (events & IBMVFC_AE_RSCN) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); + if ((events & IBMVFC_AE_LINKDOWN) && + vhost->state >= IBMVFC_HALTED) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); + if ((events & IBMVFC_AE_LINKUP) && + vhost->state == IBMVFC_INITIALIZING) + fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); +} + +/** + * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port + * @tgt: ibmvfc target struct + * + **/ +static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) +{ + struct ibmvfc_host *vhost = tgt->vhost; + struct fc_rport *rport; + unsigned long flags; + + tgt_dbg(tgt, "Adding rport\n"); + rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); + spin_lock_irqsave(vhost->host->host_lock, flags); + tgt->rport = rport; + ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); + if (rport) { + tgt_dbg(tgt, "rport add succeeded\n"); + rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; + rport->supported_classes = 0; + if (tgt->service_parms.class1_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS1; + if (tgt->service_parms.class2_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS2; + if (tgt->service_parms.class3_parms[0] & 0x80000000) + rport->supported_classes |= FC_COS_CLASS3; + } else + tgt_dbg(tgt, "rport add failed\n"); + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_do_work - Do task level work + * @vhost: ibmvfc host struct + * + **/ +static void ibmvfc_do_work(struct ibmvfc_host *vhost) +{ + struct ibmvfc_target *tgt; + unsigned long flags; + struct fc_rport *rport; + + ibmvfc_log_ae(vhost, vhost->events_to_log); + spin_lock_irqsave(vhost->host->host_lock, flags); + vhost->events_to_log = 0; + switch (vhost->action) { + case IBMVFC_HOST_ACTION_NONE: + case IBMVFC_HOST_ACTION_INIT_WAIT: + break; + case IBMVFC_HOST_ACTION_INIT: + BUG_ON(vhost->state != IBMVFC_INITIALIZING); + vhost->job_step(vhost); + break; + case IBMVFC_HOST_ACTION_QUERY: + list_for_each_entry(tgt, &vhost->targets, queue) + ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); + break; + case IBMVFC_HOST_ACTION_QUERY_TGTS: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT) { + tgt->job_step(tgt); + break; + } + } + + if (!ibmvfc_dev_init_to_do(vhost)) + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); + break; + case IBMVFC_HOST_ACTION_TGT_DEL: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { + tgt_dbg(tgt, "Deleting rport\n"); + rport = tgt->rport; + tgt->rport = NULL; + list_del(&tgt->queue); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + if (rport) + fc_remote_port_delete(rport); + kref_put(&tgt->kref, ibmvfc_release_tgt); + return; + } + } + + if (vhost->state == IBMVFC_INITIALIZING) { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); + vhost->job_step = ibmvfc_discover_targets; + } else { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + scsi_unblock_requests(vhost->host); + wake_up(&vhost->init_wait_q); + return; + } + break; + case IBMVFC_HOST_ACTION_ALLOC_TGTS: + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + ibmvfc_alloc_targets(vhost); + spin_lock_irqsave(vhost->host->host_lock, flags); + break; + case IBMVFC_HOST_ACTION_TGT_INIT: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_INIT) { + tgt->job_step(tgt); + break; + } + } + + if (!ibmvfc_dev_init_to_do(vhost)) { + ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); + vhost->init_retries = 0; + spin_unlock_irqrestore(vhost->host->host_lock, flags); + scsi_unblock_requests(vhost->host); + return; + } + break; + case IBMVFC_HOST_ACTION_TGT_ADD: + list_for_each_entry(tgt, &vhost->targets, queue) { + if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { + spin_unlock_irqrestore(vhost->host->host_lock, flags); + ibmvfc_tgt_add_rport(tgt); + return; + } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { + tgt_dbg(tgt, "Deleting rport\n"); + rport = tgt->rport; + tgt->rport = NULL; + list_del(&tgt->queue); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + if (rport) + fc_remote_port_delete(rport); + kref_put(&tgt->kref, ibmvfc_release_tgt); + return; + } + } + + if (vhost->reinit) { + vhost->reinit = 0; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + } else { + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); + wake_up(&vhost->init_wait_q); + } + break; + default: + break; + }; + + spin_unlock_irqrestore(vhost->host->host_lock, flags); +} + +/** + * ibmvfc_work - Do task level work + * @data: ibmvfc host struct + * + * Returns: + * zero + **/ +static int ibmvfc_work(void *data) +{ + struct ibmvfc_host *vhost = data; + int rc; + + set_user_nice(current, -20); + + while (1) { + rc = wait_event_interruptible(vhost->work_wait_q, + ibmvfc_work_to_do(vhost)); + + BUG_ON(rc); + + if (kthread_should_stop()) + break; + + ibmvfc_do_work(vhost); + } + + ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); + return 0; +} + +/** + * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor + * @vhost: ibmvfc host struct + * + * Allocates a page for messages, maps it for dma, and registers + * the crq with the hypervisor. + * + * Return value: + * zero on success / other on failure + **/ +static int ibmvfc_init_crq(struct ibmvfc_host *vhost) +{ + int rc, retrc = -ENOMEM; + struct device *dev = vhost->dev; + struct vio_dev *vdev = to_vio_dev(dev); + struct ibmvfc_crq_queue *crq = &vhost->crq; + + ENTER; + crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); + + if (!crq->msgs) + return -ENOMEM; + + crq->size = PAGE_SIZE / sizeof(*crq->msgs); + crq->msg_token = dma_map_single(dev, crq->msgs, + PAGE_SIZE, DMA_BIDIRECTIONAL); + + if (dma_mapping_error(crq->msg_token)) + goto map_failed; + + retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_RESOURCE) + /* maybe kexecing and resource is busy. try a reset */ + retrc = rc = ibmvfc_reset_crq(vhost); + + if (rc == H_CLOSED) + dev_warn(dev, "Partner adapter not ready\n"); + else if (rc) { + dev_warn(dev, "Error %d opening adapter\n", rc); + goto reg_crq_failed; + } + + retrc = 0; + + if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { + dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); + goto req_irq_failed; + } + + if ((rc = vio_enable_interrupts(vdev))) { + dev_err(dev, "Error %d enabling interrupts\n", rc); + goto req_irq_failed; + } + + crq->cur = 0; + LEAVE; + return retrc; + +req_irq_failed: + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); +reg_crq_failed: + dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); +map_failed: + free_page((unsigned long)crq->msgs); + return retrc; +} + +/** + * ibmvfc_free_mem - Free memory for vhost + * @vhost: ibmvfc host struct + * + * Return value: + * none + **/ +static void ibmvfc_free_mem(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; + + ENTER; + mempool_destroy(vhost->tgt_pool); + kfree(vhost->trace); + dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, + vhost->disc_buf_dma); + dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), + vhost->login_buf, vhost->login_buf_dma); + dma_pool_destroy(vhost->sg_pool); + dma_unmap_single(vhost->dev, async_q->msg_token, + async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); + free_page((unsigned long)async_q->msgs); + LEAVE; +} + +/** + * ibmvfc_alloc_mem - Allocate memory for vhost + * @vhost: ibmvfc host struct + * + * Return value: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) +{ + struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; + struct device *dev = vhost->dev; + + ENTER; + async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); + if (!async_q->msgs) { + dev_err(dev, "Couldn't allocate async queue.\n"); + goto nomem; + } + + async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); + async_q->msg_token = dma_map_single(dev, async_q->msgs, + async_q->size * sizeof(*async_q->msgs), + DMA_BIDIRECTIONAL); + + if (dma_mapping_error(async_q->msg_token)) { + dev_err(dev, "Failed to map async queue\n"); + goto free_async_crq; + } + + vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, + SG_ALL * sizeof(struct srp_direct_buf), + sizeof(struct srp_direct_buf), 0); + + if (!vhost->sg_pool) { + dev_err(dev, "Failed to allocate sg pool\n"); + goto unmap_async_crq; + } + + vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), + &vhost->login_buf_dma, GFP_KERNEL); + + if (!vhost->login_buf) { + dev_err(dev, "Couldn't allocate NPIV login buffer\n"); + goto free_sg_pool; + } + + vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; + vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, + &vhost->disc_buf_dma, GFP_KERNEL); + + if (!vhost->disc_buf) { + dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); + goto free_login_buffer; + } + + vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, + sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); + + if (!vhost->trace) + goto free_disc_buffer; + + vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, + sizeof(struct ibmvfc_target)); + + if (!vhost->tgt_pool) { + dev_err(dev, "Couldn't allocate target memory pool\n"); + goto free_trace; + } + + LEAVE; + return 0; + +free_trace: + kfree(vhost->trace); +free_disc_buffer: + dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, + vhost->disc_buf_dma); +free_login_buffer: + dma_free_coherent(dev, sizeof(*vhost->login_buf), + vhost->login_buf, vhost->login_buf_dma); +free_sg_pool: + dma_pool_destroy(vhost->sg_pool); +unmap_async_crq: + dma_unmap_single(dev, async_q->msg_token, + async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); +free_async_crq: + free_page((unsigned long)async_q->msgs); +nomem: + LEAVE; + return -ENOMEM; +} + +/** + * ibmvfc_probe - Adapter hot plug add entry point + * @vdev: vio device struct + * @id: vio device id struct + * + * Return value: + * 0 on success / non-zero on failure + **/ +static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) +{ + struct ibmvfc_host *vhost; + struct Scsi_Host *shost; + struct device *dev = &vdev->dev; + int rc = -ENOMEM; + + ENTER; + shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); + if (!shost) { + dev_err(dev, "Couldn't allocate host data\n"); + goto out; + } + + shost->transportt = ibmvfc_transport_template; + shost->can_queue = max_requests; + shost->max_lun = max_lun; + shost->max_id = max_targets; + shost->max_sectors = IBMVFC_MAX_SECTORS; + shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; + shost->unique_id = shost->host_no; + + vhost = shost_priv(shost); + INIT_LIST_HEAD(&vhost->sent); + INIT_LIST_HEAD(&vhost->free); + INIT_LIST_HEAD(&vhost->targets); + sprintf(vhost->name, IBMVFC_NAME); + vhost->host = shost; + vhost->dev = dev; + vhost->partition_number = -1; + vhost->log_level = log_level; + strcpy(vhost->partition_name, "UNKNOWN"); + init_waitqueue_head(&vhost->work_wait_q); + init_waitqueue_head(&vhost->init_wait_q); + + if ((rc = ibmvfc_alloc_mem(vhost))) + goto free_scsi_host; + + vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, + shost->host_no); + + if (IS_ERR(vhost->work_thread)) { + dev_err(dev, "Couldn't create kernel thread: %ld\n", + PTR_ERR(vhost->work_thread)); + goto free_host_mem; + } + + if ((rc = ibmvfc_init_crq(vhost))) { + dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); + goto kill_kthread; + } + + if ((rc = ibmvfc_init_event_pool(vhost))) { + dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); + goto release_crq; + } + + if ((rc = scsi_add_host(shost, dev))) + goto release_event_pool; + + if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, + &ibmvfc_trace_attr))) { + dev_err(dev, "Failed to create trace file. rc=%d\n", rc); + goto remove_shost; + } + + dev_set_drvdata(dev, vhost); + spin_lock(&ibmvfc_driver_lock); + list_add_tail(&vhost->queue, &ibmvfc_head); + spin_unlock(&ibmvfc_driver_lock); + + ibmvfc_send_crq_init(vhost); + scsi_scan_host(shost); + return 0; + +remove_shost: + scsi_remove_host(shost); +release_event_pool: + ibmvfc_free_event_pool(vhost); +release_crq: + ibmvfc_release_crq_queue(vhost); +kill_kthread: + kthread_stop(vhost->work_thread); +free_host_mem: + ibmvfc_free_mem(vhost); +free_scsi_host: + scsi_host_put(shost); +out: + LEAVE; + return rc; +} + +/** + * ibmvfc_remove - Adapter hot plug remove entry point + * @vdev: vio device struct + * + * Return value: + * 0 + **/ +static int ibmvfc_remove(struct vio_dev *vdev) +{ + struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); + unsigned long flags; + + ENTER; + ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); + kthread_stop(vhost->work_thread); + fc_remove_host(vhost->host); + scsi_remove_host(vhost->host); + ibmvfc_release_crq_queue(vhost); + + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_purge_requests(vhost, DID_ERROR); + ibmvfc_free_event_pool(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + + ibmvfc_free_mem(vhost); + spin_lock(&ibmvfc_driver_lock); + list_del(&vhost->queue); + spin_unlock(&ibmvfc_driver_lock); + scsi_host_put(vhost->host); + LEAVE; + return 0; +} + +static struct vio_device_id ibmvfc_device_table[] __devinitdata = { + {"fcp", "IBM,vfc-client"}, + { "", "" } +}; +MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); + +static struct vio_driver ibmvfc_driver = { + .id_table = ibmvfc_device_table, + .probe = ibmvfc_probe, + .remove = ibmvfc_remove, + .driver = { + .name = IBMVFC_NAME, + .owner = THIS_MODULE, + } +}; + +static struct fc_function_template ibmvfc_transport_functions = { + .show_host_fabric_name = 1, + .show_host_node_name = 1, + .show_host_port_name = 1, + .show_host_supported_classes = 1, + .show_host_port_type = 1, + .show_host_port_id = 1, + + .get_host_port_state = ibmvfc_get_host_port_state, + .show_host_port_state = 1, + + .get_host_speed = ibmvfc_get_host_speed, + .show_host_speed = 1, + + .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, + .terminate_rport_io = ibmvfc_terminate_rport_io, + + .show_rport_maxframe_size = 1, + .show_rport_supported_classes = 1, + + .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, + .show_rport_dev_loss_tmo = 1, + + .get_starget_node_name = ibmvfc_get_starget_node_name, + .show_starget_node_name = 1, + + .get_starget_port_name = ibmvfc_get_starget_port_name, + .show_starget_port_name = 1, + + .get_starget_port_id = ibmvfc_get_starget_port_id, + .show_starget_port_id = 1, +}; + +/** + * ibmvfc_module_init - Initialize the ibmvfc module + * + * Return value: + * 0 on success / other on failure + **/ +static int __init ibmvfc_module_init(void) +{ + int rc; + + if (!firmware_has_feature(FW_FEATURE_VIO)) + return -ENODEV; + + printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", + IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); + + ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); + if (!ibmvfc_transport_template) + return -ENOMEM; + + rc = vio_register_driver(&ibmvfc_driver); + if (rc) + fc_release_transport(ibmvfc_transport_template); + return rc; +} + +/** + * ibmvfc_module_exit - Teardown the ibmvfc module + * + * Return value: + * nothing + **/ +static void __exit ibmvfc_module_exit(void) +{ + vio_unregister_driver(&ibmvfc_driver); + fc_release_transport(ibmvfc_transport_template); +} + +module_init(ibmvfc_module_init); +module_exit(ibmvfc_module_exit); diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h new file mode 100644 index 00000000000..057f3c01ed6 --- /dev/null +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -0,0 +1,682 @@ +/* + * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter + * + * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation + * + * Copyright (C) IBM Corporation, 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef _IBMVFC_H +#define _IBMVFC_H + +#include <linux/list.h> +#include <linux/types.h> +#include "viosrp.h" + +#define IBMVFC_NAME "ibmvfc" +#define IBMVFC_DRIVER_VERSION "1.0.0" +#define IBMVFC_DRIVER_DATE "(July 1, 2008)" + +#define IBMVFC_DEFAULT_TIMEOUT 15 +#define IBMVFC_INIT_TIMEOUT 30 +#define IBMVFC_MAX_REQUESTS_DEFAULT 100 + +#define IBMVFC_DEBUG 0 +#define IBMVFC_MAX_TARGETS 1024 +#define IBMVFC_MAX_LUN 0xffffffff +#define IBMVFC_MAX_SECTORS 0xffffu +#define IBMVFC_MAX_DISC_THREADS 4 +#define IBMVFC_TGT_MEMPOOL_SZ 64 +#define IBMVFC_MAX_CMDS_PER_LUN 64 +#define IBMVFC_MAX_INIT_RETRIES 3 +#define IBMVFC_DEV_LOSS_TMO (5 * 60) +#define IBMVFC_DEFAULT_LOG_LEVEL 2 +#define IBMVFC_MAX_CDB_LEN 16 + +/* + * Ensure we have resources for ERP and initialization: + * 1 for ERP + * 1 for initialization + * 1 for each discovery thread + */ +#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + disc_threads) + +#define IBMVFC_MAD_SUCCESS 0x00 +#define IBMVFC_MAD_NOT_SUPPORTED 0xF1 +#define IBMVFC_MAD_FAILED 0xF7 +#define IBMVFC_MAD_DRIVER_FAILED 0xEE +#define IBMVFC_MAD_CRQ_ERROR 0xEF + +enum ibmvfc_crq_valid { + IBMVFC_CRQ_CMD_RSP = 0x80, + IBMVFC_CRQ_INIT_RSP = 0xC0, + IBMVFC_CRQ_XPORT_EVENT = 0xFF, +}; + +enum ibmvfc_crq_format { + IBMVFC_CRQ_INIT = 0x01, + IBMVFC_CRQ_INIT_COMPLETE = 0x02, + IBMVFC_PARTITION_MIGRATED = 0x06, +}; + +enum ibmvfc_cmd_status_flags { + IBMVFC_FABRIC_MAPPED = 0x0001, + IBMVFC_VIOS_FAILURE = 0x0002, + IBMVFC_FC_FAILURE = 0x0004, + IBMVFC_FC_SCSI_ERROR = 0x0008, + IBMVFC_HW_EVENT_LOGGED = 0x0010, + IBMVFC_VIOS_LOGGED = 0x0020, +}; + +enum ibmvfc_fabric_mapped_errors { + IBMVFC_UNABLE_TO_ESTABLISH = 0x0001, + IBMVFC_XPORT_FAULT = 0x0002, + IBMVFC_CMD_TIMEOUT = 0x0003, + IBMVFC_ENETDOWN = 0x0004, + IBMVFC_HW_FAILURE = 0x0005, + IBMVFC_LINK_DOWN_ERR = 0x0006, + IBMVFC_LINK_DEAD_ERR = 0x0007, + IBMVFC_UNABLE_TO_REGISTER = 0x0008, + IBMVFC_XPORT_BUSY = 0x000A, + IBMVFC_XPORT_DEAD = 0x000B, + IBMVFC_CONFIG_ERROR = 0x000C, + IBMVFC_NAME_SERVER_FAIL = 0x000D, + IBMVFC_LINK_HALTED = 0x000E, + IBMVFC_XPORT_GENERAL = 0x8000, +}; + +enum ibmvfc_vios_errors { + IBMVFC_CRQ_FAILURE = 0x0001, + IBMVFC_SW_FAILURE = 0x0002, + IBMVFC_INVALID_PARAMETER = 0x0003, + IBMVFC_MISSING_PARAMETER = 0x0004, + IBMVFC_HOST_IO_BUS = 0x0005, + IBMVFC_TRANS_CANCELLED = 0x0006, + IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007, + IBMVFC_INSUFFICIENT_RESOURCE = 0x0008, + IBMVFC_COMMAND_FAILED = 0x8000, +}; + +enum ibmvfc_mad_types { + IBMVFC_NPIV_LOGIN = 0x0001, + IBMVFC_DISC_TARGETS = 0x0002, + IBMVFC_PORT_LOGIN = 0x0004, + IBMVFC_PROCESS_LOGIN = 0x0008, + IBMVFC_QUERY_TARGET = 0x0010, + IBMVFC_IMPLICIT_LOGOUT = 0x0040, + IBMVFC_TMF_MAD = 0x0100, +}; + +struct ibmvfc_mad_common { + u32 version; + u32 reserved; + u32 opcode; + u16 status; + u16 length; + u64 tag; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_npiv_login_mad { + struct ibmvfc_mad_common common; + struct srp_direct_buf buffer; +}__attribute__((packed, aligned (8))); + +#define IBMVFC_MAX_NAME 256 + +struct ibmvfc_npiv_login { + u32 ostype; +#define IBMVFC_OS_LINUX 0x02 + u32 pad; + u64 max_dma_len; + u32 max_payload; + u32 max_response; + u32 partition_num; + u32 vfc_frame_version; + u16 fcp_version; + u16 flags; +#define IBMVFC_CLIENT_MIGRATED 0x01 +#define IBMVFC_FLUSH_ON_HALT 0x02 + u32 max_cmds; + u64 capabilities; +#define IBMVFC_CAN_MIGRATE 0x01 + u64 node_name; + struct srp_direct_buf async; + u8 partition_name[IBMVFC_MAX_NAME]; + u8 device_name[IBMVFC_MAX_NAME]; + u8 drc_name[IBMVFC_MAX_NAME]; + u64 reserved2[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_common_svc_parms { + u16 fcph_version; + u16 b2b_credit; + u16 features; + u16 bb_rcv_sz; /* upper nibble is BB_SC_N */ + u32 ratov; + u32 edtov; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_service_parms { + struct ibmvfc_common_svc_parms common; + u8 port_name[8]; + u8 node_name[8]; + u32 class1_parms[4]; + u32 class2_parms[4]; + u32 class3_parms[4]; + u32 obsolete[4]; + u32 vendor_version[4]; + u32 services_avail[2]; + u32 ext_len; + u32 reserved[30]; + u32 clk_sync_qos[2]; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_npiv_login_resp { + u32 version; + u16 status; + u16 error; + u32 flags; +#define IBMVFC_NATIVE_FC 0x01 +#define IBMVFC_CAN_FLUSH_ON_HALT 0x08 + u32 reserved; + u64 capabilites; + u32 max_cmds; + u32 scsi_id_sz; + u64 max_dma_len; + u64 scsi_id; + u64 port_name; + u64 node_name; + u64 link_speed; + u8 partition_name[IBMVFC_MAX_NAME]; + u8 device_name[IBMVFC_MAX_NAME]; + u8 port_loc_code[IBMVFC_MAX_NAME]; + u8 drc_name[IBMVFC_MAX_NAME]; + struct ibmvfc_service_parms service_parms; + u64 reserved2; +}__attribute__((packed, aligned (8))); + +union ibmvfc_npiv_login_data { + struct ibmvfc_npiv_login login; + struct ibmvfc_npiv_login_resp resp; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_discover_targets_buf { + u32 scsi_id[1]; +#define IBMVFC_DISC_TGT_SCSI_ID_MASK 0x00ffffff +}; + +struct ibmvfc_discover_targets { + struct ibmvfc_mad_common common; + struct srp_direct_buf buffer; + u32 flags; + u16 status; + u16 error; + u32 bufflen; + u32 num_avail; + u32 num_written; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_fc_reason { + IBMVFC_INVALID_ELS_CMD_CODE = 0x01, + IBMVFC_INVALID_VERSION = 0x02, + IBMVFC_LOGICAL_ERROR = 0x03, + IBMVFC_INVALID_CT_IU_SIZE = 0x04, + IBMVFC_LOGICAL_BUSY = 0x05, + IBMVFC_PROTOCOL_ERROR = 0x07, + IBMVFC_UNABLE_TO_PERFORM_REQ = 0x09, + IBMVFC_CMD_NOT_SUPPORTED = 0x0B, + IBMVFC_SERVER_NOT_AVAIL = 0x0D, + IBMVFC_CMD_IN_PROGRESS = 0x0E, + IBMVFC_VENDOR_SPECIFIC = 0xFF, +}; + +enum ibmvfc_fc_type { + IBMVFC_FABRIC_REJECT = 0x01, + IBMVFC_PORT_REJECT = 0x02, + IBMVFC_LS_REJECT = 0x03, + IBMVFC_FABRIC_BUSY = 0x04, + IBMVFC_PORT_BUSY = 0x05, + IBMVFC_BASIC_REJECT = 0x06, +}; + +enum ibmvfc_gs_explain { + IBMVFC_PORT_NAME_NOT_REG = 0x02, +}; + +struct ibmvfc_port_login { + struct ibmvfc_mad_common common; + u64 scsi_id; + u16 reserved; + u16 fc_service_class; + u32 blksz; + u32 hdr_per_blk; + u16 status; + u16 error; /* also fc_reason */ + u16 fc_explain; + u16 fc_type; + u32 reserved2; + struct ibmvfc_service_parms service_parms; + struct ibmvfc_service_parms service_parms_change; + u64 reserved3[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_prli_svc_parms { + u8 type; +#define IBMVFC_SCSI_FCP_TYPE 0x08 + u8 type_ext; + u16 flags; +#define IBMVFC_PRLI_ORIG_PA_VALID 0x8000 +#define IBMVFC_PRLI_RESP_PA_VALID 0x4000 +#define IBMVFC_PRLI_EST_IMG_PAIR 0x2000 + u32 orig_pa; + u32 resp_pa; + u32 service_parms; +#define IBMVFC_PRLI_TASK_RETRY 0x00000200 +#define IBMVFC_PRLI_RETRY 0x00000100 +#define IBMVFC_PRLI_DATA_OVERLAY 0x00000040 +#define IBMVFC_PRLI_INITIATOR_FUNC 0x00000020 +#define IBMVFC_PRLI_TARGET_FUNC 0x00000010 +#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED 0x00000002 +#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED 0x00000001 +}__attribute__((packed, aligned (4))); + +struct ibmvfc_process_login { + struct ibmvfc_mad_common common; + u64 scsi_id; + struct ibmvfc_prli_svc_parms parms; + u8 reserved[48]; + u16 status; + u16 error; /* also fc_reason */ + u32 reserved2; + u64 reserved3[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_query_tgt { + struct ibmvfc_mad_common common; + u64 wwpn; + u64 scsi_id; + u16 status; + u16 error; + u16 fc_explain; + u16 fc_type; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_implicit_logout { + struct ibmvfc_mad_common common; + u64 old_scsi_id; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_tmf { + struct ibmvfc_mad_common common; + u64 scsi_id; + struct scsi_lun lun; + u32 flags; +#define IBMVFC_TMF_ABORT_TASK 0x02 +#define IBMVFC_TMF_ABORT_TASK_SET 0x04 +#define IBMVFC_TMF_LUN_RESET 0x10 +#define IBMVFC_TMF_TGT_RESET 0x20 +#define IBMVFC_TMF_LUA_VALID 0x40 + u32 cancel_key; + u32 my_cancel_key; +#define IBMVFC_TMF_CANCEL_KEY 0x80000000 + u32 pad; + u64 reserved[2]; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_fcp_rsp_info_codes { + RSP_NO_FAILURE = 0x00, + RSP_TMF_REJECTED = 0x04, + RSP_TMF_FAILED = 0x05, + RSP_TMF_INVALID_LUN = 0x09, +}; + +struct ibmvfc_fcp_rsp_info { + u16 reserved; + u8 rsp_code; + u8 reserved2[4]; +}__attribute__((packed, aligned (2))); + +enum ibmvfc_fcp_rsp_flags { + FCP_BIDI_RSP = 0x80, + FCP_BIDI_READ_RESID_UNDER = 0x40, + FCP_BIDI_READ_RESID_OVER = 0x20, + FCP_CONF_REQ = 0x10, + FCP_RESID_UNDER = 0x08, + FCP_RESID_OVER = 0x04, + FCP_SNS_LEN_VALID = 0x02, + FCP_RSP_LEN_VALID = 0x01, +}; + +union ibmvfc_fcp_rsp_data { + struct ibmvfc_fcp_rsp_info info; + u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)]; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_fcp_rsp { + u64 reserved; + u16 retry_delay_timer; + u8 flags; + u8 scsi_status; + u32 fcp_resid; + u32 fcp_sense_len; + u32 fcp_rsp_len; + union ibmvfc_fcp_rsp_data data; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_cmd_flags { + IBMVFC_SCATTERLIST = 0x0001, + IBMVFC_NO_MEM_DESC = 0x0002, + IBMVFC_READ = 0x0004, + IBMVFC_WRITE = 0x0008, + IBMVFC_TMF = 0x0080, + IBMVFC_CLASS_3_ERR = 0x0100, +}; + +enum ibmvfc_fc_task_attr { + IBMVFC_SIMPLE_TASK = 0x00, + IBMVFC_HEAD_OF_QUEUE = 0x01, + IBMVFC_ORDERED_TASK = 0x02, + IBMVFC_ACA_TASK = 0x04, +}; + +enum ibmvfc_fc_tmf_flags { + IBMVFC_ABORT_TASK_SET = 0x02, + IBMVFC_LUN_RESET = 0x10, + IBMVFC_TARGET_RESET = 0x20, +}; + +struct ibmvfc_fcp_cmd_iu { + struct scsi_lun lun; + u8 crn; + u8 pri_task_attr; + u8 tmf_flags; + u8 add_cdb_len; +#define IBMVFC_RDDATA 0x02 +#define IBMVFC_WRDATA 0x01 + u8 cdb[IBMVFC_MAX_CDB_LEN]; + u32 xfer_len; +}__attribute__((packed, aligned (4))); + +struct ibmvfc_cmd { + u64 task_tag; + u32 frame_type; + u32 payload_len; + u32 resp_len; + u32 adapter_resid; + u16 status; + u16 error; + u16 flags; + u16 response_flags; +#define IBMVFC_ADAPTER_RESID_VALID 0x01 + u32 cancel_key; + u32 exchange_id; + struct srp_direct_buf ext_func; + struct srp_direct_buf ioba; + struct srp_direct_buf resp; + u64 correlation; + u64 tgt_scsi_id; + u64 tag; + u64 reserved3[2]; + struct ibmvfc_fcp_cmd_iu iu; + struct ibmvfc_fcp_rsp rsp; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_trace_start_entry { + u32 xfer_len; +}__attribute__((packed)); + +struct ibmvfc_trace_end_entry { + u16 status; + u16 error; + u8 fcp_rsp_flags; + u8 rsp_code; + u8 scsi_status; + u8 reserved; +}__attribute__((packed)); + +struct ibmvfc_trace_entry { + struct ibmvfc_event *evt; + u32 time; + u32 scsi_id; + u32 lun; + u8 fmt; + u8 op_code; + u8 tmf_flags; + u8 type; +#define IBMVFC_TRC_START 0x00 +#define IBMVFC_TRC_END 0xff + union { + struct ibmvfc_trace_start_entry start; + struct ibmvfc_trace_end_entry end; + } u; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_crq_formats { + IBMVFC_CMD_FORMAT = 0x01, + IBMVFC_ASYNC_EVENT = 0x02, + IBMVFC_MAD_FORMAT = 0x04, +}; + +enum ibmvfc_async_event { + IBMVFC_AE_ELS_PLOGI = 0x0001, + IBMVFC_AE_ELS_LOGO = 0x0002, + IBMVFC_AE_ELS_PRLO = 0x0004, + IBMVFC_AE_SCN_NPORT = 0x0008, + IBMVFC_AE_SCN_GROUP = 0x0010, + IBMVFC_AE_SCN_DOMAIN = 0x0020, + IBMVFC_AE_SCN_FABRIC = 0x0040, + IBMVFC_AE_LINK_UP = 0x0080, + IBMVFC_AE_LINK_DOWN = 0x0100, + IBMVFC_AE_LINK_DEAD = 0x0200, + IBMVFC_AE_HALT = 0x0400, + IBMVFC_AE_RESUME = 0x0800, + IBMVFC_AE_ADAPTER_FAILED = 0x1000, +}; + +struct ibmvfc_crq { + u8 valid; + u8 format; + u8 reserved[6]; + u64 ioba; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_crq_queue { + struct ibmvfc_crq *msgs; + int size, cur; + dma_addr_t msg_token; +}; + +struct ibmvfc_async_crq { + u8 valid; + u8 pad[3]; + u32 pad2; + u64 event; + u64 scsi_id; + u64 wwpn; + u64 node_name; + u64 reserved; +}__attribute__((packed, aligned (8))); + +struct ibmvfc_async_crq_queue { + struct ibmvfc_async_crq *msgs; + int size, cur; + dma_addr_t msg_token; +}; + +union ibmvfc_iu { + struct ibmvfc_mad_common mad_common; + struct ibmvfc_npiv_login_mad npiv_login; + struct ibmvfc_discover_targets discover_targets; + struct ibmvfc_port_login plogi; + struct ibmvfc_process_login prli; + struct ibmvfc_query_tgt query_tgt; + struct ibmvfc_implicit_logout implicit_logout; + struct ibmvfc_tmf tmf; + struct ibmvfc_cmd cmd; +}__attribute__((packed, aligned (8))); + +enum ibmvfc_target_action { + IBMVFC_TGT_ACTION_NONE = 0, + IBMVFC_TGT_ACTION_INIT, + IBMVFC_TGT_ACTION_INIT_WAIT, + IBMVFC_TGT_ACTION_ADD_RPORT, + IBMVFC_TGT_ACTION_DEL_RPORT, +}; + +struct ibmvfc_target { + struct list_head queue; + struct ibmvfc_host *vhost; + u64 scsi_id; + u64 new_scsi_id; + struct fc_rport *rport; + int target_id; + enum ibmvfc_target_action action; + int need_login; + int init_retries; + struct ibmvfc_service_parms service_parms; + struct ibmvfc_service_parms service_parms_change; + struct fc_rport_identifiers ids; + void (*job_step) (struct ibmvfc_target *); + struct kref kref; +}; + +/* a unit of work for the hosting partition */ +struct ibmvfc_event { + struct list_head queue; + struct ibmvfc_host *vhost; + struct ibmvfc_target *tgt; + struct scsi_cmnd *cmnd; + atomic_t free; + union ibmvfc_iu *xfer_iu; + void (*done) (struct ibmvfc_event *); + struct ibmvfc_crq crq; + union ibmvfc_iu iu; + union ibmvfc_iu *sync_iu; + struct srp_direct_buf *ext_list; + dma_addr_t ext_list_token; + struct completion comp; + struct timer_list timer; +}; + +/* a pool of event structs for use */ +struct ibmvfc_event_pool { + struct ibmvfc_event *events; + u32 size; + union ibmvfc_iu *iu_storage; + dma_addr_t iu_token; +}; + +enum ibmvfc_host_action { + IBMVFC_HOST_ACTION_NONE = 0, + IBMVFC_HOST_ACTION_INIT, + IBMVFC_HOST_ACTION_INIT_WAIT, + IBMVFC_HOST_ACTION_QUERY, + IBMVFC_HOST_ACTION_QUERY_TGTS, + IBMVFC_HOST_ACTION_TGT_DEL, + IBMVFC_HOST_ACTION_ALLOC_TGTS, + IBMVFC_HOST_ACTION_TGT_INIT, + IBMVFC_HOST_ACTION_TGT_ADD, +}; + +enum ibmvfc_host_state { + IBMVFC_NO_CRQ = 0, + IBMVFC_INITIALIZING, + IBMVFC_ACTIVE, + IBMVFC_HALTED, + IBMVFC_LINK_DOWN, + IBMVFC_LINK_DEAD, + IBMVFC_HOST_OFFLINE, +}; + +struct ibmvfc_host { + char name[8]; + struct list_head queue; + struct Scsi_Host *host; + enum ibmvfc_host_state state; + enum ibmvfc_host_action action; +#define IBMVFC_NUM_TRACE_INDEX_BITS 8 +#define IBMVFC_NUM_TRACE_ENTRIES (1 << IBMVFC_NUM_TRACE_INDEX_BITS) +#define IBMVFC_TRACE_SIZE (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES) + struct ibmvfc_trace_entry *trace; + u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS; + int num_targets; + struct list_head targets; + struct list_head sent; + struct list_head free; + struct device *dev; + struct ibmvfc_event_pool pool; + struct dma_pool *sg_pool; + mempool_t *tgt_pool; + struct ibmvfc_crq_queue crq; + struct ibmvfc_async_crq_queue async_crq; + struct ibmvfc_npiv_login login_info; + union ibmvfc_npiv_login_data *login_buf; + dma_addr_t login_buf_dma; + int disc_buf_sz; + int log_level; + struct ibmvfc_discover_targets_buf *disc_buf; + int task_set; + int init_retries; + int discovery_threads; + int client_migrated; + int reinit; + int events_to_log; +#define IBMVFC_AE_LINKUP 0x0001 +#define IBMVFC_AE_LINKDOWN 0x0002 +#define IBMVFC_AE_RSCN 0x0004 + dma_addr_t disc_buf_dma; + unsigned int partition_number; + char partition_name[97]; + void (*job_step) (struct ibmvfc_host *); + struct task_struct *work_thread; + wait_queue_head_t init_wait_q; + wait_queue_head_t work_wait_q; +}; + +#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0) + +#define tgt_dbg(t, fmt, ...) \ + DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)) + +#define tgt_err(t, fmt, ...) \ + dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__) + +#define ibmvfc_dbg(vhost, ...) \ + DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__)) + +#define ibmvfc_log(vhost, level, ...) \ + do { \ + if (level >= (vhost)->log_level) \ + dev_err((vhost)->dev, ##__VA_ARGS__); \ + } while (0) + +#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __FUNCTION__)) +#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __FUNCTION__)) + +#ifdef CONFIG_SCSI_IBMVFC_TRACE +#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr) +#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr) +#else +#define ibmvfc_create_trace_file(kobj, attr) 0 +#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0) +#endif + +#endif diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 72b9b2a0eba..2a2f0094570 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -64,6 +64,10 @@ MODULE_LICENSE("GPL"); #define BUG_ON(expr) #endif +static struct scsi_transport_template *iscsi_tcp_scsi_transport; +static struct scsi_host_template iscsi_sht; +static struct iscsi_transport iscsi_tcp_transport; + static unsigned int iscsi_max_lun = 512; module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); @@ -494,39 +498,43 @@ iscsi_tcp_data_recv_prep(struct iscsi_tcp_conn *tcp_conn) * must be called with session lock */ static void -iscsi_tcp_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_tcp_cleanup_task(struct iscsi_conn *conn, struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_r2t_info *r2t; - /* flush ctask's r2t queues */ - while (__kfifo_get(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*))) { - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + /* nothing to do for mgmt tasks */ + if (!task->sc) + return; + + /* flush task's r2t queues */ + while (__kfifo_get(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*))) { + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - debug_scsi("iscsi_tcp_cleanup_ctask pending r2t dropped\n"); + debug_scsi("iscsi_tcp_cleanup_task pending r2t dropped\n"); } - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; if (r2t != NULL) { - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - tcp_ctask->r2t = NULL; + tcp_task->r2t = NULL; } } /** * iscsi_data_rsp - SCSI Data-In Response processing * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task **/ static int -iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_task *task) { struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)tcp_conn->in.hdr; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; int datasn = be32_to_cpu(rhdr->datasn); unsigned total_in_length = scsi_in(sc)->length; @@ -534,18 +542,18 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) if (tcp_conn->in.datalen == 0) return 0; - if (tcp_ctask->exp_datasn != datasn) { - debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->datasn(%d)\n", - __FUNCTION__, tcp_ctask->exp_datasn, datasn); + if (tcp_task->exp_datasn != datasn) { + debug_tcp("%s: task->exp_datasn(%d) != rhdr->datasn(%d)\n", + __func__, tcp_task->exp_datasn, datasn); return ISCSI_ERR_DATASN; } - tcp_ctask->exp_datasn++; + tcp_task->exp_datasn++; - tcp_ctask->data_offset = be32_to_cpu(rhdr->offset); - if (tcp_ctask->data_offset + tcp_conn->in.datalen > total_in_length) { + tcp_task->data_offset = be32_to_cpu(rhdr->offset); + if (tcp_task->data_offset + tcp_conn->in.datalen > total_in_length) { debug_tcp("%s: data_offset(%d) + data_len(%d) > total_length_in(%d)\n", - __FUNCTION__, tcp_ctask->data_offset, + __func__, tcp_task->data_offset, tcp_conn->in.datalen, total_in_length); return ISCSI_ERR_DATA_OFFSET; } @@ -574,7 +582,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) /** * iscsi_solicit_data_init - initialize first Data-Out * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @r2t: R2T info * * Notes: @@ -584,7 +592,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) * This function is called with connection lock taken. **/ static void -iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_task *task, struct iscsi_r2t_info *r2t) { struct iscsi_data *hdr; @@ -595,8 +603,8 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, hdr->datasn = cpu_to_be32(r2t->solicit_datasn); r2t->solicit_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->itt = task->hdr->itt; hdr->exp_statsn = r2t->exp_statsn; hdr->offset = cpu_to_be32(r2t->data_offset); if (r2t->data_length > conn->max_xmit_dlength) { @@ -616,14 +624,14 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, /** * iscsi_r2t_rsp - iSCSI R2T Response processing * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task **/ static int -iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task) { struct iscsi_r2t_info *r2t; struct iscsi_session *session = conn->session; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct iscsi_r2t_rsp *rhdr = (struct iscsi_r2t_rsp *)tcp_conn->in.hdr; int r2tsn = be32_to_cpu(rhdr->r2tsn); @@ -636,23 +644,23 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) return ISCSI_ERR_DATALEN; } - if (tcp_ctask->exp_datasn != r2tsn){ - debug_tcp("%s: ctask->exp_datasn(%d) != rhdr->r2tsn(%d)\n", - __FUNCTION__, tcp_ctask->exp_datasn, r2tsn); + if (tcp_task->exp_datasn != r2tsn){ + debug_tcp("%s: task->exp_datasn(%d) != rhdr->r2tsn(%d)\n", + __func__, tcp_task->exp_datasn, r2tsn); return ISCSI_ERR_R2TSN; } /* fill-in new R2T associated with the task */ iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); - if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) { + if (!task->sc || session->state != ISCSI_STATE_LOGGED_IN) { iscsi_conn_printk(KERN_INFO, conn, "dropping R2T itt %d in recovery.\n", - ctask->itt); + task->itt); return 0; } - rc = __kfifo_get(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*)); + rc = __kfifo_get(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); BUG_ON(!rc); r2t->exp_statsn = rhdr->statsn; @@ -660,7 +668,7 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) if (r2t->data_length == 0) { iscsi_conn_printk(KERN_ERR, conn, "invalid R2T with zero data len\n"); - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); return ISCSI_ERR_DATALEN; } @@ -671,12 +679,12 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) r2t->data_length, session->max_burst); r2t->data_offset = be32_to_cpu(rhdr->data_offset); - if (r2t->data_offset + r2t->data_length > scsi_out(ctask->sc)->length) { + if (r2t->data_offset + r2t->data_length > scsi_out(task->sc)->length) { iscsi_conn_printk(KERN_ERR, conn, "invalid R2T with data len %u at offset %u " "and total length %d\n", r2t->data_length, - r2t->data_offset, scsi_out(ctask->sc)->length); - __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, + r2t->data_offset, scsi_out(task->sc)->length); + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); return ISCSI_ERR_DATALEN; } @@ -684,13 +692,13 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) r2t->ttt = rhdr->ttt; /* no flip */ r2t->solicit_datasn = 0; - iscsi_solicit_data_init(conn, ctask, r2t); + iscsi_solicit_data_init(conn, task, r2t); - tcp_ctask->exp_datasn = r2tsn + 1; - __kfifo_put(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*)); + tcp_task->exp_datasn = r2tsn + 1; + __kfifo_put(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*)); conn->r2t_pdus_cnt++; - iscsi_requeue_ctask(ctask); + iscsi_requeue_task(task); return 0; } @@ -733,10 +741,8 @@ static int iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) { int rc = 0, opcode, ahslen; - struct iscsi_session *session = conn->session; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct iscsi_cmd_task *ctask; - uint32_t itt; + struct iscsi_task *task; /* verify PDU length */ tcp_conn->in.datalen = ntoh24(hdr->dlength); @@ -754,7 +760,7 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) opcode = hdr->opcode & ISCSI_OPCODE_MASK; /* verify itt (itt encoding: age+cid+itt) */ - rc = iscsi_verify_itt(conn, hdr, &itt); + rc = iscsi_verify_itt(conn, hdr->itt); if (rc) return rc; @@ -763,16 +769,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) switch(opcode) { case ISCSI_OP_SCSI_DATA_IN: - ctask = session->cmds[itt]; spin_lock(&conn->session->lock); - rc = iscsi_data_rsp(conn, ctask); - spin_unlock(&conn->session->lock); - if (rc) - return rc; + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + rc = ISCSI_ERR_BAD_ITT; + else + rc = iscsi_data_rsp(conn, task); + if (rc) { + spin_unlock(&conn->session->lock); + break; + } + if (tcp_conn->in.datalen) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_tcp_task *tcp_task = task->dd_data; struct hash_desc *rx_hash = NULL; - struct scsi_data_buffer *sdb = scsi_in(ctask->sc); + struct scsi_data_buffer *sdb = scsi_in(task->sc); /* * Setup copy of Data-In into the Scsi_Cmnd @@ -787,17 +798,21 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) debug_tcp("iscsi_tcp_begin_data_in(%p, offset=%d, " "datalen=%d)\n", tcp_conn, - tcp_ctask->data_offset, + tcp_task->data_offset, tcp_conn->in.datalen); - return iscsi_segment_seek_sg(&tcp_conn->in.segment, - sdb->table.sgl, - sdb->table.nents, - tcp_ctask->data_offset, - tcp_conn->in.datalen, - iscsi_tcp_process_data_in, - rx_hash); + rc = iscsi_segment_seek_sg(&tcp_conn->in.segment, + sdb->table.sgl, + sdb->table.nents, + tcp_task->data_offset, + tcp_conn->in.datalen, + iscsi_tcp_process_data_in, + rx_hash); + spin_unlock(&conn->session->lock); + return rc; } - /* fall through */ + rc = __iscsi_complete_pdu(conn, hdr, NULL, 0); + spin_unlock(&conn->session->lock); + break; case ISCSI_OP_SCSI_CMD_RSP: if (tcp_conn->in.datalen) { iscsi_tcp_data_recv_prep(tcp_conn); @@ -806,15 +821,17 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) rc = iscsi_complete_pdu(conn, hdr, NULL, 0); break; case ISCSI_OP_R2T: - ctask = session->cmds[itt]; - if (ahslen) + spin_lock(&conn->session->lock); + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + rc = ISCSI_ERR_BAD_ITT; + else if (ahslen) rc = ISCSI_ERR_AHSLEN; - else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) { - spin_lock(&session->lock); - rc = iscsi_r2t_rsp(conn, ctask); - spin_unlock(&session->lock); - } else + else if (task->sc->sc_data_direction == DMA_TO_DEVICE) + rc = iscsi_r2t_rsp(conn, task); + else rc = ISCSI_ERR_PROTO; + spin_unlock(&conn->session->lock); break; case ISCSI_OP_LOGIN_RSP: case ISCSI_OP_TEXT_RSP: @@ -1176,7 +1193,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen) { struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - debug_tcp("%s(%p%s)\n", __FUNCTION__, tcp_conn, + debug_tcp("%s(%p%s)\n", __func__, tcp_conn, conn->hdrdgst_en? ", digest enabled" : ""); /* Clear the data segment - needs to be filled in by the @@ -1185,7 +1202,7 @@ iscsi_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, size_t hdrlen) /* If header digest is enabled, compute the CRC and * place the digest into the same buffer. We make - * sure that both iscsi_tcp_ctask and mtask have + * sure that both iscsi_tcp_task and mtask have * sufficient room. */ if (conn->hdrdgst_en) { @@ -1217,7 +1234,7 @@ iscsi_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg, struct hash_desc *tx_hash = NULL; unsigned int hdr_spec_len; - debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __FUNCTION__, + debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __func__, tcp_conn, offset, len, conn->datadgst_en? ", digest enabled" : ""); @@ -1242,7 +1259,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, struct hash_desc *tx_hash = NULL; unsigned int hdr_spec_len; - debug_tcp("%s(%p, datalen=%d%s)\n", __FUNCTION__, tcp_conn, len, + debug_tcp("%s(%p, datalen=%d%s)\n", __func__, tcp_conn, len, conn->datadgst_en? ", digest enabled" : ""); /* Make sure the datalen matches what the caller @@ -1260,7 +1277,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, /** * iscsi_solicit_data_cont - initialize next Data-Out * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @r2t: R2T info * @left: bytes left to transfer * @@ -1271,7 +1288,7 @@ iscsi_tcp_send_linear_data_prepare(struct iscsi_conn *conn, void *data, * Called under connection lock. **/ static int -iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_task *task, struct iscsi_r2t_info *r2t) { struct iscsi_data *hdr; @@ -1288,8 +1305,8 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, hdr->datasn = cpu_to_be32(r2t->solicit_datasn); r2t->solicit_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->itt = task->hdr->itt; hdr->exp_statsn = r2t->exp_statsn; new_offset = r2t->data_offset + r2t->sent; hdr->offset = cpu_to_be32(new_offset); @@ -1307,89 +1324,76 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, } /** - * iscsi_tcp_ctask - Initialize iSCSI SCSI_READ or SCSI_WRITE commands + * iscsi_tcp_task - Initialize iSCSI SCSI_READ or SCSI_WRITE commands * @conn: iscsi connection - * @ctask: scsi command task + * @task: scsi command task * @sc: scsi command **/ static int -iscsi_tcp_ctask_init(struct iscsi_cmd_task *ctask) +iscsi_tcp_task_init(struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - struct iscsi_conn *conn = ctask->conn; - struct scsi_cmnd *sc = ctask->sc; + struct iscsi_tcp_task *tcp_task = task->dd_data; + struct iscsi_conn *conn = task->conn; + struct scsi_cmnd *sc = task->sc; int err; - BUG_ON(__kfifo_len(tcp_ctask->r2tqueue)); - tcp_ctask->sent = 0; - tcp_ctask->exp_datasn = 0; + if (!sc) { + /* + * mgmt tasks do not have a scatterlist since they come + * in from the iscsi interface. + */ + debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, + task->itt); + + /* Prepare PDU, optionally w/ immediate data */ + iscsi_tcp_send_hdr_prep(conn, task->hdr, sizeof(*task->hdr)); + + /* If we have immediate data, attach a payload */ + if (task->data_count) + iscsi_tcp_send_linear_data_prepare(conn, task->data, + task->data_count); + return 0; + } + + BUG_ON(__kfifo_len(tcp_task->r2tqueue)); + tcp_task->sent = 0; + tcp_task->exp_datasn = 0; /* Prepare PDU, optionally w/ immediate data */ - debug_scsi("ctask deq [cid %d itt 0x%x imm %d unsol %d]\n", - conn->id, ctask->itt, ctask->imm_count, - ctask->unsol_count); - iscsi_tcp_send_hdr_prep(conn, ctask->hdr, ctask->hdr_len); + debug_scsi("task deq [cid %d itt 0x%x imm %d unsol %d]\n", + conn->id, task->itt, task->imm_count, + task->unsol_count); + iscsi_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len); - if (!ctask->imm_count) + if (!task->imm_count) return 0; /* If we have immediate data, attach a payload */ err = iscsi_tcp_send_data_prep(conn, scsi_out(sc)->table.sgl, scsi_out(sc)->table.nents, - 0, ctask->imm_count); + 0, task->imm_count); if (err) return err; - tcp_ctask->sent += ctask->imm_count; - ctask->imm_count = 0; - return 0; -} - -/** - * iscsi_tcp_mtask_xmit - xmit management(immediate) task - * @conn: iscsi connection - * @mtask: task management task - * - * Notes: - * The function can return -EAGAIN in which case caller must - * call it again later, or recover. '0' return code means successful - * xmit. - **/ -static int -iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask) -{ - int rc; - - /* Flush any pending data first. */ - rc = iscsi_tcp_flush(conn); - if (rc < 0) - return rc; - - if (mtask->hdr->itt == RESERVED_ITT) { - struct iscsi_session *session = conn->session; - - spin_lock_bh(&session->lock); - iscsi_free_mgmt_task(conn, mtask); - spin_unlock_bh(&session->lock); - } - + tcp_task->sent += task->imm_count; + task->imm_count = 0; return 0; } /* - * iscsi_tcp_ctask_xmit - xmit normal PDU task - * @conn: iscsi connection - * @ctask: iscsi command task + * iscsi_tcp_task_xmit - xmit normal PDU task + * @task: iscsi command task * * We're expected to return 0 when everything was transmitted succesfully, * -EAGAIN if there's still data in the queue, or != 0 for any other kind * of error. */ static int -iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) +iscsi_tcp_task_xmit(struct iscsi_task *task) { - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - struct scsi_cmnd *sc = ctask->sc; - struct scsi_data_buffer *sdb = scsi_out(sc); + struct iscsi_conn *conn = task->conn; + struct iscsi_tcp_task *tcp_task = task->dd_data; + struct scsi_cmnd *sc = task->sc; + struct scsi_data_buffer *sdb; int rc = 0; flush: @@ -1398,31 +1402,39 @@ flush: if (rc < 0) return rc; + /* mgmt command */ + if (!sc) { + if (task->hdr->itt == RESERVED_ITT) + iscsi_put_task(task); + return 0; + } + /* Are we done already? */ if (sc->sc_data_direction != DMA_TO_DEVICE) return 0; - if (ctask->unsol_count != 0) { - struct iscsi_data *hdr = &tcp_ctask->unsol_dtask.hdr; + sdb = scsi_out(sc); + if (task->unsol_count != 0) { + struct iscsi_data *hdr = &tcp_task->unsol_dtask.hdr; /* Prepare a header for the unsolicited PDU. * The amount of data we want to send will be - * in ctask->data_count. + * in task->data_count. * FIXME: return the data count instead. */ - iscsi_prep_unsolicit_data_pdu(ctask, hdr); + iscsi_prep_unsolicit_data_pdu(task, hdr); debug_tcp("unsol dout [itt 0x%x doff %d dlen %d]\n", - ctask->itt, tcp_ctask->sent, ctask->data_count); + task->itt, tcp_task->sent, task->data_count); iscsi_tcp_send_hdr_prep(conn, hdr, sizeof(*hdr)); rc = iscsi_tcp_send_data_prep(conn, sdb->table.sgl, - sdb->table.nents, tcp_ctask->sent, - ctask->data_count); + sdb->table.nents, tcp_task->sent, + task->data_count); if (rc) goto fail; - tcp_ctask->sent += ctask->data_count; - ctask->unsol_count -= ctask->data_count; + tcp_task->sent += task->data_count; + task->unsol_count -= task->data_count; goto flush; } else { struct iscsi_session *session = conn->session; @@ -1431,22 +1443,22 @@ flush: /* All unsolicited PDUs sent. Check for solicited PDUs. */ spin_lock_bh(&session->lock); - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; if (r2t != NULL) { /* Continue with this R2T? */ - if (!iscsi_solicit_data_cont(conn, ctask, r2t)) { + if (!iscsi_solicit_data_cont(conn, task, r2t)) { debug_scsi(" done with r2t %p\n", r2t); - __kfifo_put(tcp_ctask->r2tpool.queue, + __kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*)); - tcp_ctask->r2t = r2t = NULL; + tcp_task->r2t = r2t = NULL; } } if (r2t == NULL) { - __kfifo_get(tcp_ctask->r2tqueue, (void*)&tcp_ctask->r2t, + __kfifo_get(tcp_task->r2tqueue, (void*)&tcp_task->r2t, sizeof(void*)); - r2t = tcp_ctask->r2t; + r2t = tcp_task->r2t; } spin_unlock_bh(&session->lock); @@ -1457,7 +1469,7 @@ flush: } debug_scsi("sol dout %p [dsn %d itt 0x%x doff %d dlen %d]\n", - r2t, r2t->solicit_datasn - 1, ctask->itt, + r2t, r2t->solicit_datasn - 1, task->itt, r2t->data_offset + r2t->sent, r2t->data_count); iscsi_tcp_send_hdr_prep(conn, &r2t->dtask.hdr, @@ -1469,7 +1481,7 @@ flush: r2t->data_count); if (rc) goto fail; - tcp_ctask->sent += r2t->data_count; + tcp_task->sent += r2t->data_count; r2t->sent += r2t->data_count; goto flush; } @@ -1486,7 +1498,7 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) struct iscsi_cls_conn *cls_conn; struct iscsi_tcp_conn *tcp_conn; - cls_conn = iscsi_conn_setup(cls_session, conn_idx); + cls_conn = iscsi_conn_setup(cls_session, sizeof(*tcp_conn), conn_idx); if (!cls_conn) return NULL; conn = cls_conn->dd_data; @@ -1496,18 +1508,14 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) */ conn->max_recv_dlength = ISCSI_DEF_MAX_RECV_SEG_LEN; - tcp_conn = kzalloc(sizeof(*tcp_conn), GFP_KERNEL); - if (!tcp_conn) - goto tcp_conn_alloc_fail; - - conn->dd_data = tcp_conn; + tcp_conn = conn->dd_data; tcp_conn->iscsi_conn = conn; tcp_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC); tcp_conn->tx_hash.flags = 0; if (IS_ERR(tcp_conn->tx_hash.tfm)) - goto free_tcp_conn; + goto free_conn; tcp_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC); @@ -1519,14 +1527,12 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) free_tx_tfm: crypto_free_hash(tcp_conn->tx_hash.tfm); -free_tcp_conn: +free_conn: iscsi_conn_printk(KERN_ERR, conn, "Could not create connection due to crc32c " "loading error. Make sure the crc32c " "module is built as a module or into the " "kernel\n"); - kfree(tcp_conn); -tcp_conn_alloc_fail: iscsi_conn_teardown(cls_conn); return NULL; } @@ -1547,7 +1553,6 @@ iscsi_tcp_release_conn(struct iscsi_conn *conn) spin_lock_bh(&session->lock); tcp_conn->sock = NULL; - conn->recv_lock = NULL; spin_unlock_bh(&session->lock); sockfd_put(sock); } @@ -1559,20 +1564,32 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn) struct iscsi_tcp_conn *tcp_conn = conn->dd_data; iscsi_tcp_release_conn(conn); - iscsi_conn_teardown(cls_conn); if (tcp_conn->tx_hash.tfm) crypto_free_hash(tcp_conn->tx_hash.tfm); if (tcp_conn->rx_hash.tfm) crypto_free_hash(tcp_conn->rx_hash.tfm); - kfree(tcp_conn); + iscsi_conn_teardown(cls_conn); } static void iscsi_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) { struct iscsi_conn *conn = cls_conn->dd_data; + struct iscsi_tcp_conn *tcp_conn = conn->dd_data; + + /* userspace may have goofed up and not bound us */ + if (!tcp_conn->sock) + return; + /* + * Make sure our recv side is stopped. + * Older tools called conn stop before ep_disconnect + * so IO could still be coming in. + */ + write_lock_bh(&tcp_conn->sock->sk->sk_callback_lock); + set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); + write_unlock_bh(&tcp_conn->sock->sk->sk_callback_lock); iscsi_conn_stop(cls_conn, flag); iscsi_tcp_release_conn(conn); @@ -1623,6 +1640,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, int is_leading) { + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + struct iscsi_host *ihost = shost_priv(shost); struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct sock *sk; @@ -1646,8 +1665,8 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, if (err) goto free_socket; - err = iscsi_tcp_get_addr(conn, sock, conn->local_address, - &conn->local_port, kernel_getsockname); + err = iscsi_tcp_get_addr(conn, sock, ihost->local_address, + &ihost->local_port, kernel_getsockname); if (err) goto free_socket; @@ -1664,13 +1683,6 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session, sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */ sk->sk_allocation = GFP_ATOMIC; - /* FIXME: disable Nagle's algorithm */ - - /* - * Intercept TCP callbacks for sendfile like receive - * processing. - */ - conn->recv_lock = &sk->sk_callback_lock; iscsi_conn_set_callbacks(conn); tcp_conn->sendpage = tcp_conn->sock->ops->sendpage; /* @@ -1684,21 +1696,6 @@ free_socket: return err; } -/* called with host lock */ -static void -iscsi_tcp_mtask_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask) -{ - debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt); - - /* Prepare PDU, optionally w/ immediate data */ - iscsi_tcp_send_hdr_prep(conn, mtask->hdr, sizeof(*mtask->hdr)); - - /* If we have immediate data, attach a payload */ - if (mtask->data_count) - iscsi_tcp_send_linear_data_prepare(conn, mtask->data, - mtask->data_count); -} - static int iscsi_r2tpool_alloc(struct iscsi_session *session) { @@ -1709,8 +1706,8 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) * initialize per-task: R2T pool and xmit queue */ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[cmd_i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; /* * pre-allocated x4 as much r2ts to handle race when @@ -1719,16 +1716,16 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) */ /* R2T pool */ - if (iscsi_pool_init(&tcp_ctask->r2tpool, session->max_r2t * 4, NULL, + if (iscsi_pool_init(&tcp_task->r2tpool, session->max_r2t * 4, NULL, sizeof(struct iscsi_r2t_info))) { goto r2t_alloc_fail; } /* R2T xmit queue */ - tcp_ctask->r2tqueue = kfifo_alloc( + tcp_task->r2tqueue = kfifo_alloc( session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL); - if (tcp_ctask->r2tqueue == ERR_PTR(-ENOMEM)) { - iscsi_pool_free(&tcp_ctask->r2tpool); + if (tcp_task->r2tqueue == ERR_PTR(-ENOMEM)) { + iscsi_pool_free(&tcp_task->r2tpool); goto r2t_alloc_fail; } } @@ -1737,11 +1734,11 @@ iscsi_r2tpool_alloc(struct iscsi_session *session) r2t_alloc_fail: for (i = 0; i < cmd_i; i++) { - struct iscsi_cmd_task *ctask = session->cmds[i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - kfifo_free(tcp_ctask->r2tqueue); - iscsi_pool_free(&tcp_ctask->r2tpool); + kfifo_free(tcp_task->r2tqueue); + iscsi_pool_free(&tcp_task->r2tpool); } return -ENOMEM; } @@ -1752,11 +1749,11 @@ iscsi_r2tpool_free(struct iscsi_session *session) int i; for (i = 0; i < session->cmds_max; i++) { - struct iscsi_cmd_task *ctask = session->cmds[i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; + struct iscsi_task *task = session->cmds[i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - kfifo_free(tcp_ctask->r2tqueue); - iscsi_pool_free(&tcp_ctask->r2tpool); + kfifo_free(tcp_task->r2tqueue); + iscsi_pool_free(&tcp_task->r2tpool); } } @@ -1821,29 +1818,6 @@ iscsi_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, return len; } -static int -iscsi_tcp_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, - char *buf) -{ - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); - int len; - - switch (param) { - case ISCSI_HOST_PARAM_IPADDRESS: - spin_lock_bh(&session->lock); - if (!session->leadconn) - len = -ENODEV; - else - len = sprintf(buf, "%s\n", - session->leadconn->local_address); - spin_unlock_bh(&session->lock); - break; - default: - return iscsi_host_get_param(shost, param, buf); - } - return len; -} - static void iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) { @@ -1869,54 +1843,70 @@ iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) } static struct iscsi_cls_session * -iscsi_tcp_session_create(struct iscsi_transport *iscsit, - struct scsi_transport_template *scsit, - uint16_t cmds_max, uint16_t qdepth, - uint32_t initial_cmdsn, uint32_t *hostno) +iscsi_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max, + uint16_t qdepth, uint32_t initial_cmdsn, + uint32_t *hostno) { struct iscsi_cls_session *cls_session; struct iscsi_session *session; - uint32_t hn; + struct Scsi_Host *shost; int cmd_i; - cls_session = iscsi_session_setup(iscsit, scsit, cmds_max, qdepth, - sizeof(struct iscsi_tcp_cmd_task), - sizeof(struct iscsi_tcp_mgmt_task), - initial_cmdsn, &hn); - if (!cls_session) + if (ep) { + printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep); return NULL; - *hostno = hn; - - session = class_to_transport_session(cls_session); - for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; - struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data; - - ctask->hdr = &tcp_ctask->hdr.cmd_hdr; - ctask->hdr_max = sizeof(tcp_ctask->hdr) - ISCSI_DIGEST_SIZE; } - for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) { - struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i]; - struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data; + shost = iscsi_host_alloc(&iscsi_sht, 0, qdepth); + if (!shost) + return NULL; + shost->transportt = iscsi_tcp_scsi_transport; + shost->max_lun = iscsi_max_lun; + shost->max_id = 0; + shost->max_channel = 0; + shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE; + + if (iscsi_host_add(shost, NULL)) + goto free_host; + *hostno = shost->host_no; + + cls_session = iscsi_session_setup(&iscsi_tcp_transport, shost, cmds_max, + sizeof(struct iscsi_tcp_task), + initial_cmdsn, 0); + if (!cls_session) + goto remove_host; + session = cls_session->dd_data; + + shost->can_queue = session->scsi_cmds_max; + for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { + struct iscsi_task *task = session->cmds[cmd_i]; + struct iscsi_tcp_task *tcp_task = task->dd_data; - mtask->hdr = (struct iscsi_hdr *) &tcp_mtask->hdr; + task->hdr = &tcp_task->hdr.cmd_hdr; + task->hdr_max = sizeof(tcp_task->hdr) - ISCSI_DIGEST_SIZE; } - if (iscsi_r2tpool_alloc(class_to_transport_session(cls_session))) - goto r2tpool_alloc_fail; - + if (iscsi_r2tpool_alloc(session)) + goto remove_session; return cls_session; -r2tpool_alloc_fail: +remove_session: iscsi_session_teardown(cls_session); +remove_host: + iscsi_host_remove(shost); +free_host: + iscsi_host_free(shost); return NULL; } static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session) { - iscsi_r2tpool_free(class_to_transport_session(cls_session)); - iscsi_session_teardown(cls_session); + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + + iscsi_r2tpool_free(cls_session->dd_data); + + iscsi_host_remove(shost); + iscsi_host_free(shost); } static int iscsi_tcp_slave_configure(struct scsi_device *sdev) @@ -1971,14 +1961,11 @@ static struct iscsi_transport iscsi_tcp_transport = { ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | ISCSI_LU_RESET_TMO | - ISCSI_PING_TMO | ISCSI_RECV_TMO, + ISCSI_PING_TMO | ISCSI_RECV_TMO | + ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | ISCSI_HOST_INITIATOR_NAME | ISCSI_HOST_NETDEV_NAME, - .host_template = &iscsi_sht, - .conndata_size = sizeof(struct iscsi_conn), - .max_conn = 1, - .max_cmd_len = 16, /* session management */ .create_session = iscsi_tcp_session_create, .destroy_session = iscsi_tcp_session_destroy, @@ -1992,16 +1979,14 @@ static struct iscsi_transport iscsi_tcp_transport = { .start_conn = iscsi_conn_start, .stop_conn = iscsi_tcp_conn_stop, /* iscsi host params */ - .get_host_param = iscsi_tcp_host_get_param, + .get_host_param = iscsi_host_get_param, .set_host_param = iscsi_host_set_param, /* IO */ .send_pdu = iscsi_conn_send_pdu, .get_stats = iscsi_conn_get_stats, - .init_cmd_task = iscsi_tcp_ctask_init, - .init_mgmt_task = iscsi_tcp_mtask_init, - .xmit_cmd_task = iscsi_tcp_ctask_xmit, - .xmit_mgmt_task = iscsi_tcp_mtask_xmit, - .cleanup_cmd_task = iscsi_tcp_cleanup_ctask, + .init_task = iscsi_tcp_task_init, + .xmit_task = iscsi_tcp_task_xmit, + .cleanup_task = iscsi_tcp_cleanup_task, /* recovery */ .session_recovery_timedout = iscsi_session_recovery_timedout, }; @@ -2014,9 +1999,10 @@ iscsi_tcp_init(void) iscsi_max_lun); return -EINVAL; } - iscsi_tcp_transport.max_lun = iscsi_max_lun; - if (!iscsi_register_transport(&iscsi_tcp_transport)) + iscsi_tcp_scsi_transport = iscsi_register_transport( + &iscsi_tcp_transport); + if (!iscsi_tcp_scsi_transport) return -ENODEV; return 0; diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h index ed0b991d1e7..498d8ca3984 100644 --- a/drivers/scsi/iscsi_tcp.h +++ b/drivers/scsi/iscsi_tcp.h @@ -103,11 +103,6 @@ struct iscsi_data_task { char hdrext[ISCSI_DIGEST_SIZE];/* Header-Digest */ }; -struct iscsi_tcp_mgmt_task { - struct iscsi_hdr hdr; - char hdrext[ISCSI_DIGEST_SIZE]; /* Header-Digest */ -}; - struct iscsi_r2t_info { __be32 ttt; /* copied from R2T */ __be32 exp_statsn; /* copied from R2T */ @@ -119,7 +114,7 @@ struct iscsi_r2t_info { struct iscsi_data_task dtask; /* Data-Out header buf */ }; -struct iscsi_tcp_cmd_task { +struct iscsi_tcp_task { struct iscsi_hdr_buff { struct iscsi_cmd cmd_hdr; char hdrextbuf[ISCSI_MAX_AHS_SIZE + diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index b43bf1d60da..299e075a7b3 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -38,14 +38,6 @@ #include <scsi/scsi_transport_iscsi.h> #include <scsi/libiscsi.h> -struct iscsi_session * -class_to_transport_session(struct iscsi_cls_session *cls_session) -{ - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - return iscsi_hostdata(shost->hostdata); -} -EXPORT_SYMBOL_GPL(class_to_transport_session); - /* Serial Number Arithmetic, 32 bits, less than, RFC1982 */ #define SNA32_CHECK 2147483648UL @@ -87,68 +79,70 @@ iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr) * xmit thread */ if (!list_empty(&session->leadconn->xmitqueue) || - !list_empty(&session->leadconn->mgmtqueue)) - scsi_queue_work(session->host, - &session->leadconn->xmitwork); + !list_empty(&session->leadconn->mgmtqueue)) { + if (!(session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_queue_work(session->host, + &session->leadconn->xmitwork); + } } } EXPORT_SYMBOL_GPL(iscsi_update_cmdsn); -void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *ctask, +void iscsi_prep_unsolicit_data_pdu(struct iscsi_task *task, struct iscsi_data *hdr) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; memset(hdr, 0, sizeof(struct iscsi_data)); hdr->ttt = cpu_to_be32(ISCSI_RESERVED_TAG); - hdr->datasn = cpu_to_be32(ctask->unsol_datasn); - ctask->unsol_datasn++; + hdr->datasn = cpu_to_be32(task->unsol_datasn); + task->unsol_datasn++; hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); - hdr->itt = ctask->hdr->itt; + hdr->itt = task->hdr->itt; hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); - hdr->offset = cpu_to_be32(ctask->unsol_offset); + hdr->offset = cpu_to_be32(task->unsol_offset); - if (ctask->unsol_count > conn->max_xmit_dlength) { + if (task->unsol_count > conn->max_xmit_dlength) { hton24(hdr->dlength, conn->max_xmit_dlength); - ctask->data_count = conn->max_xmit_dlength; - ctask->unsol_offset += ctask->data_count; + task->data_count = conn->max_xmit_dlength; + task->unsol_offset += task->data_count; hdr->flags = 0; } else { - hton24(hdr->dlength, ctask->unsol_count); - ctask->data_count = ctask->unsol_count; + hton24(hdr->dlength, task->unsol_count); + task->data_count = task->unsol_count; hdr->flags = ISCSI_FLAG_CMD_FINAL; } } EXPORT_SYMBOL_GPL(iscsi_prep_unsolicit_data_pdu); -static int iscsi_add_hdr(struct iscsi_cmd_task *ctask, unsigned len) +static int iscsi_add_hdr(struct iscsi_task *task, unsigned len) { - unsigned exp_len = ctask->hdr_len + len; + unsigned exp_len = task->hdr_len + len; - if (exp_len > ctask->hdr_max) { + if (exp_len > task->hdr_max) { WARN_ON(1); return -EINVAL; } WARN_ON(len & (ISCSI_PAD_LEN - 1)); /* caller must pad the AHS */ - ctask->hdr_len = exp_len; + task->hdr_len = exp_len; return 0; } /* * make an extended cdb AHS */ -static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) +static int iscsi_prep_ecdb_ahs(struct iscsi_task *task) { - struct scsi_cmnd *cmd = ctask->sc; + struct scsi_cmnd *cmd = task->sc; unsigned rlen, pad_len; unsigned short ahslength; struct iscsi_ecdb_ahdr *ecdb_ahdr; int rc; - ecdb_ahdr = iscsi_next_hdr(ctask); + ecdb_ahdr = iscsi_next_hdr(task); rlen = cmd->cmd_len - ISCSI_CDB_SIZE; BUG_ON(rlen > sizeof(ecdb_ahdr->ecdb)); @@ -156,7 +150,7 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) pad_len = iscsi_padding(rlen); - rc = iscsi_add_hdr(ctask, sizeof(ecdb_ahdr->ahslength) + + rc = iscsi_add_hdr(task, sizeof(ecdb_ahdr->ahslength) + sizeof(ecdb_ahdr->ahstype) + ahslength + pad_len); if (rc) return rc; @@ -171,19 +165,19 @@ static int iscsi_prep_ecdb_ahs(struct iscsi_cmd_task *ctask) debug_scsi("iscsi_prep_ecdb_ahs: varlen_cdb_len %d " "rlen %d pad_len %d ahs_length %d iscsi_headers_size %u\n", - cmd->cmd_len, rlen, pad_len, ahslength, ctask->hdr_len); + cmd->cmd_len, rlen, pad_len, ahslength, task->hdr_len); return 0; } -static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask) +static int iscsi_prep_bidi_ahs(struct iscsi_task *task) { - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; struct iscsi_rlength_ahdr *rlen_ahdr; int rc; - rlen_ahdr = iscsi_next_hdr(ctask); - rc = iscsi_add_hdr(ctask, sizeof(*rlen_ahdr)); + rlen_ahdr = iscsi_next_hdr(task); + rc = iscsi_add_hdr(task, sizeof(*rlen_ahdr)); if (rc) return rc; @@ -203,28 +197,28 @@ static int iscsi_prep_bidi_ahs(struct iscsi_cmd_task *ctask) /** * iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu - * @ctask: iscsi cmd task + * @task: iscsi task * * Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set * fields like dlength or final based on how much data it sends */ -static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) +static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; struct iscsi_session *session = conn->session; - struct iscsi_cmd *hdr = ctask->hdr; - struct scsi_cmnd *sc = ctask->sc; + struct iscsi_cmd *hdr = task->hdr; + struct scsi_cmnd *sc = task->sc; unsigned hdrlength, cmd_len; int rc; - ctask->hdr_len = 0; - rc = iscsi_add_hdr(ctask, sizeof(*hdr)); + task->hdr_len = 0; + rc = iscsi_add_hdr(task, sizeof(*hdr)); if (rc) return rc; hdr->opcode = ISCSI_OP_SCSI_CMD; hdr->flags = ISCSI_ATTR_SIMPLE; int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun); - hdr->itt = build_itt(ctask->itt, session->age); + hdr->itt = build_itt(task->itt, session->age); hdr->cmdsn = cpu_to_be32(session->cmdsn); session->cmdsn++; hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); @@ -232,17 +226,17 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) if (cmd_len < ISCSI_CDB_SIZE) memset(&hdr->cdb[cmd_len], 0, ISCSI_CDB_SIZE - cmd_len); else if (cmd_len > ISCSI_CDB_SIZE) { - rc = iscsi_prep_ecdb_ahs(ctask); + rc = iscsi_prep_ecdb_ahs(task); if (rc) return rc; cmd_len = ISCSI_CDB_SIZE; } memcpy(hdr->cdb, sc->cmnd, cmd_len); - ctask->imm_count = 0; + task->imm_count = 0; if (scsi_bidi_cmnd(sc)) { hdr->flags |= ISCSI_FLAG_CMD_READ; - rc = iscsi_prep_bidi_ahs(ctask); + rc = iscsi_prep_bidi_ahs(task); if (rc) return rc; } @@ -264,28 +258,28 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) * * pad_count bytes to be sent as zero-padding */ - ctask->unsol_count = 0; - ctask->unsol_offset = 0; - ctask->unsol_datasn = 0; + task->unsol_count = 0; + task->unsol_offset = 0; + task->unsol_datasn = 0; if (session->imm_data_en) { if (out_len >= session->first_burst) - ctask->imm_count = min(session->first_burst, + task->imm_count = min(session->first_burst, conn->max_xmit_dlength); else - ctask->imm_count = min(out_len, + task->imm_count = min(out_len, conn->max_xmit_dlength); - hton24(hdr->dlength, ctask->imm_count); + hton24(hdr->dlength, task->imm_count); } else zero_data(hdr->dlength); if (!session->initial_r2t_en) { - ctask->unsol_count = min(session->first_burst, out_len) - - ctask->imm_count; - ctask->unsol_offset = ctask->imm_count; + task->unsol_count = min(session->first_burst, out_len) + - task->imm_count; + task->unsol_offset = task->imm_count; } - if (!ctask->unsol_count) + if (!task->unsol_count) /* No unsolicit Data-Out's */ hdr->flags |= ISCSI_FLAG_CMD_FINAL; } else { @@ -298,7 +292,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) } /* calculate size of additional header segments (AHSs) */ - hdrlength = ctask->hdr_len - sizeof(*hdr); + hdrlength = task->hdr_len - sizeof(*hdr); WARN_ON(hdrlength & (ISCSI_PAD_LEN-1)); hdrlength /= ISCSI_PAD_LEN; @@ -306,76 +300,115 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) WARN_ON(hdrlength >= 256); hdr->hlength = hdrlength & 0xFF; - if (conn->session->tt->init_cmd_task(conn->ctask)) - return EIO; + if (conn->session->tt->init_task && + conn->session->tt->init_task(task)) + return -EIO; + + task->state = ISCSI_TASK_RUNNING; + list_move_tail(&task->running, &conn->run_list); conn->scsicmd_pdus_cnt++; - debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x " - "len %d bidi_len %d cmdsn %d win %d]\n", - scsi_bidi_cmnd(sc) ? "bidirectional" : - sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read", - conn->id, sc, sc->cmnd[0], ctask->itt, - scsi_bufflen(sc), scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, - session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1); + debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d " + "bidi_len %d cmdsn %d win %d]\n", scsi_bidi_cmnd(sc) ? + "bidirectional" : sc->sc_data_direction == DMA_TO_DEVICE ? + "write" : "read", conn->id, sc, sc->cmnd[0], task->itt, + scsi_bufflen(sc), + scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, + session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1); return 0; } /** - * iscsi_complete_command - return command back to scsi-ml - * @ctask: iscsi cmd task + * iscsi_complete_command - finish a task + * @task: iscsi cmd task * * Must be called with session lock. - * This function returns the scsi command to scsi-ml and returns - * the cmd task to the pool of available cmd tasks. + * This function returns the scsi command to scsi-ml or cleans + * up mgmt tasks then returns the task to the pool. */ -static void iscsi_complete_command(struct iscsi_cmd_task *ctask) +static void iscsi_complete_command(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; - ctask->state = ISCSI_TASK_COMPLETED; - ctask->sc = NULL; - /* SCSI eh reuses commands to verify us */ - sc->SCp.ptr = NULL; - if (conn->ctask == ctask) - conn->ctask = NULL; - list_del_init(&ctask->running); - __kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*)); - sc->scsi_done(sc); + list_del_init(&task->running); + task->state = ISCSI_TASK_COMPLETED; + task->sc = NULL; + + if (conn->task == task) + conn->task = NULL; + /* + * login task is preallocated so do not free + */ + if (conn->login_task == task) + return; + + __kfifo_put(session->cmdpool.queue, (void*)&task, sizeof(void*)); + + if (conn->ping_task == task) + conn->ping_task = NULL; + + if (sc) { + task->sc = NULL; + /* SCSI eh reuses commands to verify us */ + sc->SCp.ptr = NULL; + /* + * queue command may call this to free the task, but + * not have setup the sc callback + */ + if (sc->scsi_done) + sc->scsi_done(sc); + } +} + +void __iscsi_get_task(struct iscsi_task *task) +{ + atomic_inc(&task->refcount); } +EXPORT_SYMBOL_GPL(__iscsi_get_task); -static void __iscsi_get_ctask(struct iscsi_cmd_task *ctask) +static void __iscsi_put_task(struct iscsi_task *task) { - atomic_inc(&ctask->refcount); + if (atomic_dec_and_test(&task->refcount)) + iscsi_complete_command(task); } -static void __iscsi_put_ctask(struct iscsi_cmd_task *ctask) +void iscsi_put_task(struct iscsi_task *task) { - if (atomic_dec_and_test(&ctask->refcount)) - iscsi_complete_command(ctask); + struct iscsi_session *session = task->conn->session; + + spin_lock_bh(&session->lock); + __iscsi_put_task(task); + spin_unlock_bh(&session->lock); } +EXPORT_SYMBOL_GPL(iscsi_put_task); /* * session lock must be held */ -static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, +static void fail_command(struct iscsi_conn *conn, struct iscsi_task *task, int err) { struct scsi_cmnd *sc; - sc = ctask->sc; + sc = task->sc; if (!sc) return; - if (ctask->state == ISCSI_TASK_PENDING) + if (task->state == ISCSI_TASK_PENDING) /* * cmd never made it to the xmit thread, so we should not count * the cmd in the sequencing */ conn->session->queued_cmdsn--; else - conn->session->tt->cleanup_cmd_task(conn, ctask); + conn->session->tt->cleanup_task(conn, task); + /* + * Check if cleanup_task dropped the lock and the command completed, + */ + if (!task->sc) + return; sc->result = err; if (!scsi_bidi_cmnd(sc)) @@ -384,39 +417,63 @@ static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, scsi_out(sc)->resid = scsi_out(sc)->length; scsi_in(sc)->resid = scsi_in(sc)->length; } - if (conn->ctask == ctask) - conn->ctask = NULL; + + if (conn->task == task) + conn->task = NULL; /* release ref from queuecommand */ - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); } -/** - * iscsi_free_mgmt_task - return mgmt task back to pool - * @conn: iscsi connection - * @mtask: mtask - * - * Must be called with session lock. - */ -void iscsi_free_mgmt_task(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) +static int iscsi_prep_mgmt_task(struct iscsi_conn *conn, + struct iscsi_task *task) { - list_del_init(&mtask->running); - if (conn->login_mtask == mtask) - return; + struct iscsi_session *session = conn->session; + struct iscsi_hdr *hdr = (struct iscsi_hdr *)task->hdr; + struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; + + if (conn->session->state == ISCSI_STATE_LOGGING_OUT) + return -ENOTCONN; + + if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) && + hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE)) + nop->exp_statsn = cpu_to_be32(conn->exp_statsn); + /* + * pre-format CmdSN for outgoing PDU. + */ + nop->cmdsn = cpu_to_be32(session->cmdsn); + if (hdr->itt != RESERVED_ITT) { + hdr->itt = build_itt(task->itt, session->age); + /* + * TODO: We always use immediate, so we never hit this. + * If we start to send tmfs or nops as non-immediate then + * we should start checking the cmdsn numbers for mgmt tasks. + */ + if (conn->c_stage == ISCSI_CONN_STARTED && + !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { + session->queued_cmdsn++; + session->cmdsn++; + } + } - if (conn->ping_mtask == mtask) - conn->ping_mtask = NULL; - __kfifo_put(conn->session->mgmtpool.queue, - (void*)&mtask, sizeof(void*)); + if (session->tt->init_task) + session->tt->init_task(task); + + if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) + session->state = ISCSI_STATE_LOGGING_OUT; + + list_move_tail(&task->running, &conn->mgmt_run_list); + debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n", + hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt, + task->data_count); + return 0; } -EXPORT_SYMBOL_GPL(iscsi_free_mgmt_task); -static struct iscsi_mgmt_task * +static struct iscsi_task * __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *data, uint32_t data_size) { struct iscsi_session *session = conn->session; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; if (session->state == ISCSI_STATE_TERMINATE) return NULL; @@ -426,29 +483,56 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, /* * Login and Text are sent serially, in * request-followed-by-response sequence. - * Same mtask can be used. Same ITT must be used. - * Note that login_mtask is preallocated at conn_create(). + * Same task can be used. Same ITT must be used. + * Note that login_task is preallocated at conn_create(). */ - mtask = conn->login_mtask; + task = conn->login_task; else { BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE); BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED); - if (!__kfifo_get(session->mgmtpool.queue, - (void*)&mtask, sizeof(void*))) + if (!__kfifo_get(session->cmdpool.queue, + (void*)&task, sizeof(void*))) return NULL; + + if ((hdr->opcode == (ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE)) && + hdr->ttt == RESERVED_ITT) { + conn->ping_task = task; + conn->last_ping = jiffies; + } } + /* + * released in complete pdu for task we expect a response for, and + * released by the lld when it has transmitted the task for + * pdus we do not expect a response for. + */ + atomic_set(&task->refcount, 1); + task->conn = conn; + task->sc = NULL; if (data_size) { - memcpy(mtask->data, data, data_size); - mtask->data_count = data_size; + memcpy(task->data, data, data_size); + task->data_count = data_size; + } else + task->data_count = 0; + + memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr)); + INIT_LIST_HEAD(&task->running); + list_add_tail(&task->running, &conn->mgmtqueue); + + if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) { + if (iscsi_prep_mgmt_task(conn, task)) { + __iscsi_put_task(task); + return NULL; + } + + if (session->tt->xmit_task(task)) + task = NULL; + } else - mtask->data_count = 0; + scsi_queue_work(conn->session->host, &conn->xmitwork); - memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr)); - INIT_LIST_HEAD(&mtask->running); - list_add_tail(&mtask->running, &conn->mgmtqueue); - return mtask; + return task; } int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, @@ -462,7 +546,6 @@ int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size)) err = -EPERM; spin_unlock_bh(&session->lock); - scsi_queue_work(session->host, &conn->xmitwork); return err; } EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); @@ -471,7 +554,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); * iscsi_cmd_rsp - SCSI Command Response processing * @conn: iscsi connection * @hdr: iscsi header - * @ctask: scsi command task + * @task: scsi command task * @data: cmd data buffer * @datalen: len of buffer * @@ -479,12 +562,12 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); * then completes the command and task. **/ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - struct iscsi_cmd_task *ctask, char *data, + struct iscsi_task *task, char *data, int datalen) { struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr; struct iscsi_session *session = conn->session; - struct scsi_cmnd *sc = ctask->sc; + struct scsi_cmnd *sc = task->sc; iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; @@ -508,7 +591,7 @@ invalid_datalen: goto out; } - senselen = be16_to_cpu(get_unaligned((__be16 *) data)); + senselen = get_unaligned_be16(data); if (datalen < senselen) goto invalid_datalen; @@ -544,10 +627,10 @@ invalid_datalen: } out: debug_scsi("done [sc %lx res %d itt 0x%x]\n", - (long)sc, sc->result, ctask->itt); + (long)sc, sc->result, task->itt); conn->scsirsp_pdus_cnt++; - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); } static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) @@ -572,9 +655,9 @@ static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) { struct iscsi_nopout hdr; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; - if (!rhdr && conn->ping_mtask) + if (!rhdr && conn->ping_task) return; memset(&hdr, 0, sizeof(struct iscsi_nopout)); @@ -588,18 +671,9 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) } else hdr.ttt = RESERVED_ITT; - mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); - if (!mtask) { + task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); + if (!task) iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n"); - return; - } - - /* only track our nops */ - if (!rhdr) { - conn->ping_mtask = mtask; - conn->last_ping = jiffies; - } - scsi_queue_work(conn->session->host, &conn->xmitwork); } static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, @@ -628,6 +702,31 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, } /** + * iscsi_itt_to_task - look up task by itt + * @conn: iscsi connection + * @itt: itt + * + * This should be used for mgmt tasks like login and nops, or if + * the LDD's itt space does not include the session age. + * + * The session lock must be held. + */ +static struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt) +{ + struct iscsi_session *session = conn->session; + uint32_t i; + + if (itt == RESERVED_ITT) + return NULL; + + i = get_itt(itt); + if (i >= session->cmds_max) + return NULL; + + return session->cmds[i]; +} + +/** * __iscsi_complete_pdu - complete pdu * @conn: iscsi conn * @hdr: iscsi header @@ -638,108 +737,28 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, * queuecommand or send generic. session lock must be held and verify * itt must have been called. */ -static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - char *data, int datalen) +int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, + char *data, int datalen) { struct iscsi_session *session = conn->session; int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0; - struct iscsi_cmd_task *ctask; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; uint32_t itt; conn->last_recv = jiffies; + rc = iscsi_verify_itt(conn, hdr->itt); + if (rc) + return rc; + if (hdr->itt != RESERVED_ITT) itt = get_itt(hdr->itt); else itt = ~0U; - if (itt < session->cmds_max) { - ctask = session->cmds[itt]; - - debug_scsi("cmdrsp [op 0x%x cid %d itt 0x%x len %d]\n", - opcode, conn->id, ctask->itt, datalen); - - switch(opcode) { - case ISCSI_OP_SCSI_CMD_RSP: - BUG_ON((void*)ctask != ctask->sc->SCp.ptr); - iscsi_scsi_cmd_rsp(conn, hdr, ctask, data, - datalen); - break; - case ISCSI_OP_SCSI_DATA_IN: - BUG_ON((void*)ctask != ctask->sc->SCp.ptr); - if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { - conn->scsirsp_pdus_cnt++; - __iscsi_put_ctask(ctask); - } - break; - case ISCSI_OP_R2T: - /* LLD handles this for now */ - break; - default: - rc = ISCSI_ERR_BAD_OPCODE; - break; - } - } else if (itt >= ISCSI_MGMT_ITT_OFFSET && - itt < ISCSI_MGMT_ITT_OFFSET + session->mgmtpool_max) { - mtask = session->mgmt_cmds[itt - ISCSI_MGMT_ITT_OFFSET]; - - debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n", - opcode, conn->id, mtask->itt, datalen); + debug_scsi("[op 0x%x cid %d itt 0x%x len %d]\n", + opcode, conn->id, itt, datalen); - iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); - switch(opcode) { - case ISCSI_OP_LOGOUT_RSP: - if (datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; - /* fall through */ - case ISCSI_OP_LOGIN_RSP: - case ISCSI_OP_TEXT_RSP: - /* - * login related PDU's exp_statsn is handled in - * userspace - */ - if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) - rc = ISCSI_ERR_CONN_FAILED; - iscsi_free_mgmt_task(conn, mtask); - break; - case ISCSI_OP_SCSI_TMFUNC_RSP: - if (datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - - iscsi_tmf_rsp(conn, hdr); - iscsi_free_mgmt_task(conn, mtask); - break; - case ISCSI_OP_NOOP_IN: - if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || - datalen) { - rc = ISCSI_ERR_PROTO; - break; - } - conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; - - if (conn->ping_mtask != mtask) { - /* - * If this is not in response to one of our - * nops then it must be from userspace. - */ - if (iscsi_recv_pdu(conn->cls_conn, hdr, data, - datalen)) - rc = ISCSI_ERR_CONN_FAILED; - } else - mod_timer(&conn->transport_timer, - jiffies + conn->recv_timeout); - iscsi_free_mgmt_task(conn, mtask); - break; - default: - rc = ISCSI_ERR_BAD_OPCODE; - break; - } - } else if (itt == ~0U) { + if (itt == ~0U) { iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); switch(opcode) { @@ -766,11 +785,104 @@ static int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, rc = ISCSI_ERR_BAD_OPCODE; break; } - } else - rc = ISCSI_ERR_BAD_ITT; + goto out; + } + switch(opcode) { + case ISCSI_OP_SCSI_CMD_RSP: + case ISCSI_OP_SCSI_DATA_IN: + task = iscsi_itt_to_ctask(conn, hdr->itt); + if (!task) + return ISCSI_ERR_BAD_ITT; + break; + case ISCSI_OP_R2T: + /* + * LLD handles R2Ts if they need to. + */ + return 0; + case ISCSI_OP_LOGOUT_RSP: + case ISCSI_OP_LOGIN_RSP: + case ISCSI_OP_TEXT_RSP: + case ISCSI_OP_SCSI_TMFUNC_RSP: + case ISCSI_OP_NOOP_IN: + task = iscsi_itt_to_task(conn, hdr->itt); + if (!task) + return ISCSI_ERR_BAD_ITT; + break; + default: + return ISCSI_ERR_BAD_OPCODE; + } + + switch(opcode) { + case ISCSI_OP_SCSI_CMD_RSP: + iscsi_scsi_cmd_rsp(conn, hdr, task, data, datalen); + break; + case ISCSI_OP_SCSI_DATA_IN: + if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { + conn->scsirsp_pdus_cnt++; + iscsi_update_cmdsn(session, + (struct iscsi_nopin*) hdr); + __iscsi_put_task(task); + } + break; + case ISCSI_OP_LOGOUT_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; + goto recv_pdu; + case ISCSI_OP_LOGIN_RSP: + case ISCSI_OP_TEXT_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + /* + * login related PDU's exp_statsn is handled in + * userspace + */ + goto recv_pdu; + case ISCSI_OP_SCSI_TMFUNC_RSP: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + + iscsi_tmf_rsp(conn, hdr); + __iscsi_put_task(task); + break; + case ISCSI_OP_NOOP_IN: + iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); + if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) { + rc = ISCSI_ERR_PROTO; + break; + } + conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; + + if (conn->ping_task != task) + /* + * If this is not in response to one of our + * nops then it must be from userspace. + */ + goto recv_pdu; + + mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout); + __iscsi_put_task(task); + break; + default: + rc = ISCSI_ERR_BAD_OPCODE; + break; + } + +out: + return rc; +recv_pdu: + if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) + rc = ISCSI_ERR_CONN_FAILED; + __iscsi_put_task(task); return rc; } +EXPORT_SYMBOL_GPL(__iscsi_complete_pdu); int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, char *data, int datalen) @@ -784,51 +896,63 @@ int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, } EXPORT_SYMBOL_GPL(iscsi_complete_pdu); -/* verify itt (itt encoding: age+cid+itt) */ -int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr, - uint32_t *ret_itt) +int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt) { struct iscsi_session *session = conn->session; - struct iscsi_cmd_task *ctask; - uint32_t itt; + uint32_t i; - if (hdr->itt != RESERVED_ITT) { - if (((__force u32)hdr->itt & ISCSI_AGE_MASK) != - (session->age << ISCSI_AGE_SHIFT)) { - iscsi_conn_printk(KERN_ERR, conn, - "received itt %x expected session " - "age (%x)\n", (__force u32)hdr->itt, - session->age & ISCSI_AGE_MASK); - return ISCSI_ERR_BAD_ITT; - } + if (itt == RESERVED_ITT) + return 0; - itt = get_itt(hdr->itt); - } else - itt = ~0U; + if (((__force u32)itt & ISCSI_AGE_MASK) != + (session->age << ISCSI_AGE_SHIFT)) { + iscsi_conn_printk(KERN_ERR, conn, + "received itt %x expected session age (%x)\n", + (__force u32)itt, session->age); + return ISCSI_ERR_BAD_ITT; + } - if (itt < session->cmds_max) { - ctask = session->cmds[itt]; + i = get_itt(itt); + if (i >= session->cmds_max) { + iscsi_conn_printk(KERN_ERR, conn, + "received invalid itt index %u (max cmds " + "%u.\n", i, session->cmds_max); + return ISCSI_ERR_BAD_ITT; + } + return 0; +} +EXPORT_SYMBOL_GPL(iscsi_verify_itt); - if (!ctask->sc) { - iscsi_conn_printk(KERN_INFO, conn, "dropping ctask " - "with itt 0x%x\n", ctask->itt); - /* force drop */ - return ISCSI_ERR_NO_SCSI_CMD; - } +/** + * iscsi_itt_to_ctask - look up ctask by itt + * @conn: iscsi connection + * @itt: itt + * + * This should be used for cmd tasks. + * + * The session lock must be held. + */ +struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt) +{ + struct iscsi_task *task; - if (ctask->sc->SCp.phase != session->age) { - iscsi_conn_printk(KERN_ERR, conn, - "iscsi: ctask's session age %d, " - "expected %d\n", ctask->sc->SCp.phase, - session->age); - return ISCSI_ERR_SESSION_FAILED; - } + if (iscsi_verify_itt(conn, itt)) + return NULL; + + task = iscsi_itt_to_task(conn, itt); + if (!task || !task->sc) + return NULL; + + if (task->sc->SCp.phase != conn->session->age) { + iscsi_session_printk(KERN_ERR, conn->session, + "task's session age %d, expected %d\n", + task->sc->SCp.phase, conn->session->age); + return NULL; } - *ret_itt = itt; - return 0; + return task; } -EXPORT_SYMBOL_GPL(iscsi_verify_itt); +EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask); void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) { @@ -850,61 +974,6 @@ void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) } EXPORT_SYMBOL_GPL(iscsi_conn_failure); -static void iscsi_prep_mtask(struct iscsi_conn *conn, - struct iscsi_mgmt_task *mtask) -{ - struct iscsi_session *session = conn->session; - struct iscsi_hdr *hdr = mtask->hdr; - struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; - - if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) && - hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE)) - nop->exp_statsn = cpu_to_be32(conn->exp_statsn); - /* - * pre-format CmdSN for outgoing PDU. - */ - nop->cmdsn = cpu_to_be32(session->cmdsn); - if (hdr->itt != RESERVED_ITT) { - hdr->itt = build_itt(mtask->itt, session->age); - /* - * TODO: We always use immediate, so we never hit this. - * If we start to send tmfs or nops as non-immediate then - * we should start checking the cmdsn numbers for mgmt tasks. - */ - if (conn->c_stage == ISCSI_CONN_STARTED && - !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { - session->queued_cmdsn++; - session->cmdsn++; - } - } - - if (session->tt->init_mgmt_task) - session->tt->init_mgmt_task(conn, mtask); - - debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n", - hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt, - mtask->data_count); -} - -static int iscsi_xmit_mtask(struct iscsi_conn *conn) -{ - struct iscsi_hdr *hdr = conn->mtask->hdr; - int rc; - - if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) - conn->session->state = ISCSI_STATE_LOGGING_OUT; - spin_unlock_bh(&conn->session->lock); - - rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask); - spin_lock_bh(&conn->session->lock); - if (rc) - return rc; - - /* done with this in-progress mtask */ - conn->mtask = NULL; - return 0; -} - static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) { struct iscsi_session *session = conn->session; @@ -922,37 +991,38 @@ static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) return 0; } -static int iscsi_xmit_ctask(struct iscsi_conn *conn) +static int iscsi_xmit_task(struct iscsi_conn *conn) { - struct iscsi_cmd_task *ctask = conn->ctask; + struct iscsi_task *task = conn->task; int rc; - __iscsi_get_ctask(ctask); + __iscsi_get_task(task); spin_unlock_bh(&conn->session->lock); - rc = conn->session->tt->xmit_cmd_task(conn, ctask); + rc = conn->session->tt->xmit_task(task); spin_lock_bh(&conn->session->lock); - __iscsi_put_ctask(ctask); + __iscsi_put_task(task); if (!rc) - /* done with this ctask */ - conn->ctask = NULL; + /* done with this task */ + conn->task = NULL; return rc; } /** - * iscsi_requeue_ctask - requeue ctask to run from session workqueue - * @ctask: ctask to requeue + * iscsi_requeue_task - requeue task to run from session workqueue + * @task: task to requeue * - * LLDs that need to run a ctask from the session workqueue should call - * this. The session lock must be held. + * LLDs that need to run a task from the session workqueue should call + * this. The session lock must be held. This should only be called + * by software drivers. */ -void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask) +void iscsi_requeue_task(struct iscsi_task *task) { - struct iscsi_conn *conn = ctask->conn; + struct iscsi_conn *conn = task->conn; - list_move_tail(&ctask->running, &conn->requeue); + list_move_tail(&task->running, &conn->requeue); scsi_queue_work(conn->session->host, &conn->xmitwork); } -EXPORT_SYMBOL_GPL(iscsi_requeue_ctask); +EXPORT_SYMBOL_GPL(iscsi_requeue_task); /** * iscsi_data_xmit - xmit any command into the scheduled connection @@ -974,14 +1044,8 @@ static int iscsi_data_xmit(struct iscsi_conn *conn) return -ENODATA; } - if (conn->ctask) { - rc = iscsi_xmit_ctask(conn); - if (rc) - goto again; - } - - if (conn->mtask) { - rc = iscsi_xmit_mtask(conn); + if (conn->task) { + rc = iscsi_xmit_task(conn); if (rc) goto again; } @@ -993,17 +1057,14 @@ static int iscsi_data_xmit(struct iscsi_conn *conn) */ check_mgmt: while (!list_empty(&conn->mgmtqueue)) { - conn->mtask = list_entry(conn->mgmtqueue.next, - struct iscsi_mgmt_task, running); - if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { - iscsi_free_mgmt_task(conn, conn->mtask); - conn->mtask = NULL; + conn->task = list_entry(conn->mgmtqueue.next, + struct iscsi_task, running); + if (iscsi_prep_mgmt_task(conn, conn->task)) { + __iscsi_put_task(conn->task); + conn->task = NULL; continue; } - - iscsi_prep_mtask(conn, conn->mtask); - list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list); - rc = iscsi_xmit_mtask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; } @@ -1013,24 +1074,21 @@ check_mgmt: if (conn->tmf_state == TMF_QUEUED) break; - conn->ctask = list_entry(conn->xmitqueue.next, - struct iscsi_cmd_task, running); + conn->task = list_entry(conn->xmitqueue.next, + struct iscsi_task, running); if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { - fail_command(conn, conn->ctask, DID_IMM_RETRY << 16); + fail_command(conn, conn->task, DID_IMM_RETRY << 16); continue; } - if (iscsi_prep_scsi_cmd_pdu(conn->ctask)) { - fail_command(conn, conn->ctask, DID_ABORT << 16); + if (iscsi_prep_scsi_cmd_pdu(conn->task)) { + fail_command(conn, conn->task, DID_ABORT << 16); continue; } - - conn->ctask->state = ISCSI_TASK_RUNNING; - list_move_tail(conn->xmitqueue.next, &conn->run_list); - rc = iscsi_xmit_ctask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; /* - * we could continuously get new ctask requests so + * we could continuously get new task requests so * we need to check the mgmt queue for nops that need to * be sent to aviod starvation */ @@ -1048,11 +1106,11 @@ check_mgmt: if (conn->session->state == ISCSI_STATE_LOGGING_OUT) break; - conn->ctask = list_entry(conn->requeue.next, - struct iscsi_cmd_task, running); - conn->ctask->state = ISCSI_TASK_RUNNING; + conn->task = list_entry(conn->requeue.next, + struct iscsi_task, running); + conn->task->state = ISCSI_TASK_RUNNING; list_move_tail(conn->requeue.next, &conn->run_list); - rc = iscsi_xmit_ctask(conn); + rc = iscsi_xmit_task(conn); if (rc) goto again; if (!list_empty(&conn->mgmtqueue)) @@ -1096,11 +1154,12 @@ enum { int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) { + struct iscsi_cls_session *cls_session; struct Scsi_Host *host; int reason = 0; struct iscsi_session *session; struct iscsi_conn *conn; - struct iscsi_cmd_task *ctask = NULL; + struct iscsi_task *task = NULL; sc->scsi_done = done; sc->result = 0; @@ -1109,10 +1168,11 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) host = sc->device->host; spin_unlock(host->host_lock); - session = iscsi_hostdata(host->hostdata); + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; spin_lock(&session->lock); - reason = iscsi_session_chkready(session_to_cls(session)); + reason = iscsi_session_chkready(cls_session); if (reason) { sc->result = reason; goto fault; @@ -1167,26 +1227,39 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) goto reject; } - if (!__kfifo_get(session->cmdpool.queue, (void*)&ctask, + if (!__kfifo_get(session->cmdpool.queue, (void*)&task, sizeof(void*))) { reason = FAILURE_OOM; goto reject; } - session->queued_cmdsn++; - sc->SCp.phase = session->age; - sc->SCp.ptr = (char *)ctask; - - atomic_set(&ctask->refcount, 1); - ctask->state = ISCSI_TASK_PENDING; - ctask->conn = conn; - ctask->sc = sc; - INIT_LIST_HEAD(&ctask->running); + sc->SCp.ptr = (char *)task; + + atomic_set(&task->refcount, 1); + task->state = ISCSI_TASK_PENDING; + task->conn = conn; + task->sc = sc; + INIT_LIST_HEAD(&task->running); + list_add_tail(&task->running, &conn->xmitqueue); + + if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) { + if (iscsi_prep_scsi_cmd_pdu(task)) { + sc->result = DID_ABORT << 16; + sc->scsi_done = NULL; + iscsi_complete_command(task); + goto fault; + } + if (session->tt->xmit_task(task)) { + sc->scsi_done = NULL; + iscsi_complete_command(task); + reason = FAILURE_SESSION_NOT_READY; + goto reject; + } + } else + scsi_queue_work(session->host, &conn->xmitwork); - list_add_tail(&ctask->running, &conn->xmitqueue); + session->queued_cmdsn++; spin_unlock(&session->lock); - - scsi_queue_work(host, &conn->xmitwork); spin_lock(host->host_lock); return 0; @@ -1205,7 +1278,7 @@ fault: scsi_out(sc)->resid = scsi_out(sc)->length; scsi_in(sc)->resid = scsi_in(sc)->length; } - sc->scsi_done(sc); + done(sc); spin_lock(host->host_lock); return 0; } @@ -1222,7 +1295,7 @@ EXPORT_SYMBOL_GPL(iscsi_change_queue_depth); void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; spin_lock_bh(&session->lock); if (session->state != ISCSI_STATE_LOGGED_IN) { @@ -1236,9 +1309,13 @@ EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout); int iscsi_eh_host_reset(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); - struct iscsi_conn *conn = session->leadconn; + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; + struct iscsi_conn *conn; + + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + conn = session->leadconn; mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); @@ -1300,11 +1377,11 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, int timeout) { struct iscsi_session *session = conn->session; - struct iscsi_mgmt_task *mtask; + struct iscsi_task *task; - mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, + task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0); - if (!mtask) { + if (!task) { spin_unlock_bh(&session->lock); iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); spin_lock_bh(&session->lock); @@ -1320,7 +1397,6 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, spin_unlock_bh(&session->lock); mutex_unlock(&session->eh_mutex); - scsi_queue_work(session->host, &conn->xmitwork); /* * block eh thread until: @@ -1339,7 +1415,7 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); - /* if the session drops it will clean up the mtask */ + /* if the session drops it will clean up the task */ if (age != session->age || session->state != ISCSI_STATE_LOGGED_IN) return -ENOTCONN; @@ -1353,48 +1429,51 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, static void fail_all_commands(struct iscsi_conn *conn, unsigned lun, int error) { - struct iscsi_cmd_task *ctask, *tmp; + struct iscsi_task *task, *tmp; - if (conn->ctask && (conn->ctask->sc->device->lun == lun || lun == -1)) - conn->ctask = NULL; + if (conn->task && (conn->task->sc->device->lun == lun || lun == -1)) + conn->task = NULL; /* flush pending */ - list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing pending sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, error << 16); + task->sc, task->itt); + fail_command(conn, task, error << 16); } } - list_for_each_entry_safe(ctask, tmp, &conn->requeue, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->requeue, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing requeued sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, error << 16); + task->sc, task->itt); + fail_command(conn, task, error << 16); } } /* fail all other running */ - list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) { - if (lun == ctask->sc->device->lun || lun == -1) { + list_for_each_entry_safe(task, tmp, &conn->run_list, running) { + if (lun == task->sc->device->lun || lun == -1) { debug_scsi("failing in progress sc %p itt 0x%x\n", - ctask->sc, ctask->itt); - fail_command(conn, ctask, DID_BUS_BUSY << 16); + task->sc, task->itt); + fail_command(conn, task, DID_BUS_BUSY << 16); } } } -static void iscsi_suspend_tx(struct iscsi_conn *conn) +void iscsi_suspend_tx(struct iscsi_conn *conn) { set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); - scsi_flush_work(conn->session->host); + if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_flush_work(conn->session->host); } +EXPORT_SYMBOL_GPL(iscsi_suspend_tx); static void iscsi_start_tx(struct iscsi_conn *conn) { clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); - scsi_queue_work(conn->session->host, &conn->xmitwork); + if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD)) + scsi_queue_work(conn->session->host, &conn->xmitwork); } static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) @@ -1405,7 +1484,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) enum scsi_eh_timer_return rc = EH_NOT_HANDLED; cls_session = starget_to_session(scsi_target(scmd->device)); - session = class_to_transport_session(cls_session); + session = cls_session->dd_data; debug_scsi("scsi cmd %p timedout\n", scmd); @@ -1443,7 +1522,7 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) jiffies)) rc = EH_RESET_TIMER; /* if in the middle of checking the transport then give us more time */ - if (conn->ping_mtask) + if (conn->ping_task) rc = EH_RESET_TIMER; done: spin_unlock(&session->lock); @@ -1467,7 +1546,7 @@ static void iscsi_check_transport_timeouts(unsigned long data) recv_timeout *= HZ; last_recv = conn->last_recv; - if (conn->ping_mtask && + if (conn->ping_task && time_before_eq(conn->last_ping + (conn->ping_timeout * HZ), jiffies)) { iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs " @@ -1493,27 +1572,30 @@ done: spin_unlock(&session->lock); } -static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask, +static void iscsi_prep_abort_task_pdu(struct iscsi_task *task, struct iscsi_tm *hdr) { memset(hdr, 0, sizeof(*hdr)); hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK; hdr->flags |= ISCSI_FLAG_CMD_FINAL; - memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun)); - hdr->rtt = ctask->hdr->itt; - hdr->refcmdsn = ctask->hdr->cmdsn; + memcpy(hdr->lun, task->hdr->lun, sizeof(hdr->lun)); + hdr->rtt = task->hdr->itt; + hdr->refcmdsn = task->hdr->cmdsn; } int iscsi_eh_abort(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; struct iscsi_conn *conn; - struct iscsi_cmd_task *ctask; + struct iscsi_task *task; struct iscsi_tm *hdr; int rc, age; + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + mutex_lock(&session->eh_mutex); spin_lock_bh(&session->lock); /* @@ -1542,17 +1624,17 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) conn->eh_abort_cnt++; age = session->age; - ctask = (struct iscsi_cmd_task *)sc->SCp.ptr; - debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt); + task = (struct iscsi_task *)sc->SCp.ptr; + debug_scsi("aborting [sc %p itt 0x%x]\n", sc, task->itt); - /* ctask completed before time out */ - if (!ctask->sc) { + /* task completed before time out */ + if (!task->sc) { debug_scsi("sc completed while abort in progress\n"); goto success; } - if (ctask->state == ISCSI_TASK_PENDING) { - fail_command(conn, ctask, DID_ABORT << 16); + if (task->state == ISCSI_TASK_PENDING) { + fail_command(conn, task, DID_ABORT << 16); goto success; } @@ -1562,7 +1644,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) conn->tmf_state = TMF_QUEUED; hdr = &conn->tmhdr; - iscsi_prep_abort_task_pdu(ctask, hdr); + iscsi_prep_abort_task_pdu(task, hdr); if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) { rc = FAILED; @@ -1572,16 +1654,20 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) switch (conn->tmf_state) { case TMF_SUCCESS: spin_unlock_bh(&session->lock); + /* + * stop tx side incase the target had sent a abort rsp but + * the initiator was still writing out data. + */ iscsi_suspend_tx(conn); /* - * clean up task if aborted. grab the recv lock as a writer + * we do not stop the recv side because targets have been + * good and have never sent us a successful tmf response + * then sent more data for the cmd. */ - write_lock_bh(conn->recv_lock); spin_lock(&session->lock); - fail_command(conn, ctask, DID_ABORT << 16); + fail_command(conn, task, DID_ABORT << 16); conn->tmf_state = TMF_INITIAL; spin_unlock(&session->lock); - write_unlock_bh(conn->recv_lock); iscsi_start_tx(conn); goto success_unlocked; case TMF_TIMEDOUT: @@ -1591,7 +1677,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) case TMF_NOT_FOUND: if (!sc->SCp.ptr) { conn->tmf_state = TMF_INITIAL; - /* ctask completed before tmf abort response */ + /* task completed before tmf abort response */ debug_scsi("sc completed while abort in progress\n"); goto success; } @@ -1604,7 +1690,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc) success: spin_unlock_bh(&session->lock); success_unlocked: - debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, ctask->itt); + debug_scsi("abort success [sc %lx itt 0x%x]\n", (long)sc, task->itt); mutex_unlock(&session->eh_mutex); return SUCCESS; @@ -1612,7 +1698,7 @@ failed: spin_unlock_bh(&session->lock); failed_unlocked: debug_scsi("abort failed [sc %p itt 0x%x]\n", sc, - ctask ? ctask->itt : 0); + task ? task->itt : 0); mutex_unlock(&session->eh_mutex); return FAILED; } @@ -1630,12 +1716,15 @@ static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) int iscsi_eh_device_reset(struct scsi_cmnd *sc) { - struct Scsi_Host *host = sc->device->host; - struct iscsi_session *session = iscsi_hostdata(host->hostdata); + struct iscsi_cls_session *cls_session; + struct iscsi_session *session; struct iscsi_conn *conn; struct iscsi_tm *hdr; int rc = FAILED; + cls_session = starget_to_session(scsi_target(sc->device)); + session = cls_session->dd_data; + debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun); mutex_lock(&session->eh_mutex); @@ -1678,13 +1767,11 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc) spin_unlock_bh(&session->lock); iscsi_suspend_tx(conn); - /* need to grab the recv lock then session lock */ - write_lock_bh(conn->recv_lock); + spin_lock(&session->lock); fail_all_commands(conn, sc->device->lun, DID_ERROR); conn->tmf_state = TMF_INITIAL; spin_unlock(&session->lock); - write_unlock_bh(conn->recv_lock); iscsi_start_tx(conn); goto done; @@ -1760,177 +1847,203 @@ void iscsi_pool_free(struct iscsi_pool *q) } EXPORT_SYMBOL_GPL(iscsi_pool_free); -/* - * iSCSI Session's hostdata organization: +/** + * iscsi_host_add - add host to system + * @shost: scsi host + * @pdev: parent device + * + * This should be called by partial offload and software iscsi drivers + * to add a host to the system. + */ +int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev) +{ + if (!shost->can_queue) + shost->can_queue = ISCSI_DEF_XMIT_CMDS_MAX; + + return scsi_add_host(shost, pdev); +} +EXPORT_SYMBOL_GPL(iscsi_host_add); + +/** + * iscsi_host_alloc - allocate a host and driver data + * @sht: scsi host template + * @dd_data_size: driver host data size + * @qdepth: default device queue depth + * + * This should be called by partial offload and software iscsi drivers. + * To access the driver specific memory use the iscsi_host_priv() macro. + */ +struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, + int dd_data_size, uint16_t qdepth) +{ + struct Scsi_Host *shost; + + shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size); + if (!shost) + return NULL; + shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; + + if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) { + if (qdepth != 0) + printk(KERN_ERR "iscsi: invalid queue depth of %d. " + "Queue depth must be between 1 and %d.\n", + qdepth, ISCSI_MAX_CMD_PER_LUN); + qdepth = ISCSI_DEF_CMD_PER_LUN; + } + shost->cmd_per_lun = qdepth; + return shost; +} +EXPORT_SYMBOL_GPL(iscsi_host_alloc); + +/** + * iscsi_host_remove - remove host and sessions + * @shost: scsi host * - * *------------------* <== hostdata_session(host->hostdata) - * | ptr to class sess| - * |------------------| <== iscsi_hostdata(host->hostdata) - * | iscsi_session | - * *------------------* + * This will also remove any sessions attached to the host, but if userspace + * is managing the session at the same time this will break. TODO: add + * refcounting to the netlink iscsi interface so a rmmod or host hot unplug + * does not remove the memory from under us. */ +void iscsi_host_remove(struct Scsi_Host *shost) +{ + iscsi_host_for_each_session(shost, iscsi_session_teardown); + scsi_remove_host(shost); +} +EXPORT_SYMBOL_GPL(iscsi_host_remove); -#define hostdata_privsize(_sz) (sizeof(unsigned long) + _sz + \ - _sz % sizeof(unsigned long)) +void iscsi_host_free(struct Scsi_Host *shost) +{ + struct iscsi_host *ihost = shost_priv(shost); -#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata)) + kfree(ihost->netdev); + kfree(ihost->hwaddress); + kfree(ihost->initiatorname); + scsi_host_put(shost); +} +EXPORT_SYMBOL_GPL(iscsi_host_free); /** * iscsi_session_setup - create iscsi cls session and host and session - * @scsit: scsi transport template * @iscsit: iscsi transport template - * @cmds_max: scsi host can queue - * @qdepth: scsi host cmds per lun - * @cmd_task_size: LLD ctask private data size - * @mgmt_task_size: LLD mtask private data size + * @shost: scsi host + * @cmds_max: session can queue + * @cmd_task_size: LLD task private data size * @initial_cmdsn: initial CmdSN - * @hostno: host no allocated * * This can be used by software iscsi_transports that allocate * a session per scsi host. - **/ + * + * Callers should set cmds_max to the largest total numer (mgmt + scsi) of + * tasks they support. The iscsi layer reserves ISCSI_MGMT_CMDS_MAX tasks + * for nop handling and login/logout requests. + */ struct iscsi_cls_session * -iscsi_session_setup(struct iscsi_transport *iscsit, - struct scsi_transport_template *scsit, - uint16_t cmds_max, uint16_t qdepth, - int cmd_task_size, int mgmt_task_size, - uint32_t initial_cmdsn, uint32_t *hostno) +iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, + uint16_t cmds_max, int cmd_task_size, + uint32_t initial_cmdsn, unsigned int id) { - struct Scsi_Host *shost; struct iscsi_session *session; struct iscsi_cls_session *cls_session; - int cmd_i; + int cmd_i, scsi_cmds, total_cmds = cmds_max; - if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) { - if (qdepth != 0) - printk(KERN_ERR "iscsi: invalid queue depth of %d. " - "Queue depth must be between 1 and %d.\n", - qdepth, ISCSI_MAX_CMD_PER_LUN); - qdepth = ISCSI_DEF_CMD_PER_LUN; + if (!total_cmds) + total_cmds = ISCSI_DEF_XMIT_CMDS_MAX; + /* + * The iscsi layer needs some tasks for nop handling and tmfs, + * so the cmds_max must at least be greater than ISCSI_MGMT_CMDS_MAX + * + 1 command for scsi IO. + */ + if (total_cmds < ISCSI_TOTAL_CMDS_MIN) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of two that is at least %d.\n", + total_cmds, ISCSI_TOTAL_CMDS_MIN); + return NULL; } - if (!is_power_of_2(cmds_max) || cmds_max >= ISCSI_MGMT_ITT_OFFSET || - cmds_max < 2) { - if (cmds_max != 0) - printk(KERN_ERR "iscsi: invalid can_queue of %d. " - "can_queue must be a power of 2 and between " - "2 and %d - setting to %d.\n", cmds_max, - ISCSI_MGMT_ITT_OFFSET, ISCSI_DEF_XMIT_CMDS_MAX); - cmds_max = ISCSI_DEF_XMIT_CMDS_MAX; + if (total_cmds > ISCSI_TOTAL_CMDS_MAX) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of 2 less than or equal to %d.\n", + cmds_max, ISCSI_TOTAL_CMDS_MAX); + total_cmds = ISCSI_TOTAL_CMDS_MAX; } - shost = scsi_host_alloc(iscsit->host_template, - hostdata_privsize(sizeof(*session))); - if (!shost) - return NULL; - - /* the iscsi layer takes one task for reserve */ - shost->can_queue = cmds_max - 1; - shost->cmd_per_lun = qdepth; - shost->max_id = 1; - shost->max_channel = 0; - shost->max_lun = iscsit->max_lun; - shost->max_cmd_len = iscsit->max_cmd_len; - shost->transportt = scsit; - shost->transportt->create_work_queue = 1; - shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; - *hostno = shost->host_no; + if (!is_power_of_2(total_cmds)) { + printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " + "must be a power of 2.\n", total_cmds); + total_cmds = rounddown_pow_of_two(total_cmds); + if (total_cmds < ISCSI_TOTAL_CMDS_MIN) + return NULL; + printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n", + total_cmds); + } + scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX; - session = iscsi_hostdata(shost->hostdata); - memset(session, 0, sizeof(struct iscsi_session)); + cls_session = iscsi_alloc_session(shost, iscsit, + sizeof(struct iscsi_session)); + if (!cls_session) + return NULL; + session = cls_session->dd_data; + session->cls_session = cls_session; session->host = shost; session->state = ISCSI_STATE_FREE; session->fast_abort = 1; session->lu_reset_timeout = 15; session->abort_timeout = 10; - session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX; - session->cmds_max = cmds_max; + session->scsi_cmds_max = scsi_cmds; + session->cmds_max = total_cmds; session->queued_cmdsn = session->cmdsn = initial_cmdsn; session->exp_cmdsn = initial_cmdsn + 1; session->max_cmdsn = initial_cmdsn + 1; session->max_r2t = 1; session->tt = iscsit; mutex_init(&session->eh_mutex); + spin_lock_init(&session->lock); /* initialize SCSI PDU commands pool */ if (iscsi_pool_init(&session->cmdpool, session->cmds_max, (void***)&session->cmds, - cmd_task_size + sizeof(struct iscsi_cmd_task))) + cmd_task_size + sizeof(struct iscsi_task))) goto cmdpool_alloc_fail; /* pre-format cmds pool with ITT */ for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { - struct iscsi_cmd_task *ctask = session->cmds[cmd_i]; + struct iscsi_task *task = session->cmds[cmd_i]; if (cmd_task_size) - ctask->dd_data = &ctask[1]; - ctask->itt = cmd_i; - INIT_LIST_HEAD(&ctask->running); - } - - spin_lock_init(&session->lock); - - /* initialize immediate command pool */ - if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max, - (void***)&session->mgmt_cmds, - mgmt_task_size + sizeof(struct iscsi_mgmt_task))) - goto mgmtpool_alloc_fail; - - - /* pre-format immediate cmds pool with ITT */ - for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) { - struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i]; - - if (mgmt_task_size) - mtask->dd_data = &mtask[1]; - mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i; - INIT_LIST_HEAD(&mtask->running); + task->dd_data = &task[1]; + task->itt = cmd_i; + INIT_LIST_HEAD(&task->running); } - if (scsi_add_host(shost, NULL)) - goto add_host_fail; - if (!try_module_get(iscsit->owner)) - goto cls_session_fail; - - cls_session = iscsi_create_session(shost, iscsit, 0); - if (!cls_session) - goto module_put; - *(unsigned long*)shost->hostdata = (unsigned long)cls_session; + goto module_get_fail; + if (iscsi_add_session(cls_session, id)) + goto cls_session_fail; return cls_session; -module_put: - module_put(iscsit->owner); cls_session_fail: - scsi_remove_host(shost); -add_host_fail: - iscsi_pool_free(&session->mgmtpool); -mgmtpool_alloc_fail: + module_put(iscsit->owner); +module_get_fail: iscsi_pool_free(&session->cmdpool); cmdpool_alloc_fail: - scsi_host_put(shost); + iscsi_free_session(cls_session); return NULL; } EXPORT_SYMBOL_GPL(iscsi_session_setup); /** * iscsi_session_teardown - destroy session, host, and cls_session - * shost: scsi host + * @cls_session: iscsi session * - * This can be used by software iscsi_transports that allocate - * a session per scsi host. - **/ + * The driver must have called iscsi_remove_session before + * calling this. + */ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) { - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_session *session = cls_session->dd_data; struct module *owner = cls_session->transport->owner; - iscsi_remove_session(cls_session); - scsi_remove_host(shost); - - iscsi_pool_free(&session->mgmtpool); iscsi_pool_free(&session->cmdpool); kfree(session->password); @@ -1938,12 +2051,10 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) kfree(session->username); kfree(session->username_in); kfree(session->targetname); - kfree(session->netdev); - kfree(session->hwaddress); kfree(session->initiatorname); + kfree(session->ifacename); - iscsi_free_session(cls_session); - scsi_host_put(shost); + iscsi_destroy_session(cls_session); module_put(owner); } EXPORT_SYMBOL_GPL(iscsi_session_teardown); @@ -1951,22 +2062,26 @@ EXPORT_SYMBOL_GPL(iscsi_session_teardown); /** * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn * @cls_session: iscsi_cls_session + * @dd_size: private driver data size * @conn_idx: cid - **/ + */ struct iscsi_cls_conn * -iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx) +iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, + uint32_t conn_idx) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; struct iscsi_conn *conn; struct iscsi_cls_conn *cls_conn; char *data; - cls_conn = iscsi_create_conn(cls_session, conn_idx); + cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size, + conn_idx); if (!cls_conn) return NULL; conn = cls_conn->dd_data; - memset(conn, 0, sizeof(*conn)); + memset(conn, 0, sizeof(*conn) + dd_size); + conn->dd_data = cls_conn->dd_data + sizeof(*conn); conn->session = session; conn->cls_conn = cls_conn; conn->c_stage = ISCSI_CONN_INITIAL_STAGE; @@ -1985,30 +2100,30 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx) INIT_LIST_HEAD(&conn->requeue); INIT_WORK(&conn->xmitwork, iscsi_xmitworker); - /* allocate login_mtask used for the login/text sequences */ + /* allocate login_task used for the login/text sequences */ spin_lock_bh(&session->lock); - if (!__kfifo_get(session->mgmtpool.queue, - (void*)&conn->login_mtask, + if (!__kfifo_get(session->cmdpool.queue, + (void*)&conn->login_task, sizeof(void*))) { spin_unlock_bh(&session->lock); - goto login_mtask_alloc_fail; + goto login_task_alloc_fail; } spin_unlock_bh(&session->lock); data = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN, GFP_KERNEL); if (!data) - goto login_mtask_data_alloc_fail; - conn->login_mtask->data = conn->data = data; + goto login_task_data_alloc_fail; + conn->login_task->data = conn->data = data; init_timer(&conn->tmf_timer); init_waitqueue_head(&conn->ehwait); return cls_conn; -login_mtask_data_alloc_fail: - __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask, +login_task_data_alloc_fail: + __kfifo_put(session->cmdpool.queue, (void*)&conn->login_task, sizeof(void*)); -login_mtask_alloc_fail: +login_task_alloc_fail: iscsi_destroy_conn(cls_conn); return NULL; } @@ -2068,7 +2183,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn) spin_lock_bh(&session->lock); kfree(conn->data); kfree(conn->persistent_address); - __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask, + __kfifo_put(session->cmdpool.queue, (void*)&conn->login_task, sizeof(void*)); if (session->leadconn == conn) session->leadconn = NULL; @@ -2140,7 +2255,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn) } spin_unlock_bh(&session->lock); - iscsi_unblock_session(session_to_cls(session)); + iscsi_unblock_session(session->cls_session); wake_up(&conn->ehwait); return 0; } @@ -2149,21 +2264,23 @@ EXPORT_SYMBOL_GPL(iscsi_conn_start); static void flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn) { - struct iscsi_mgmt_task *mtask, *tmp; + struct iscsi_task *task, *tmp; /* handle pending */ - list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) { - debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt); - iscsi_free_mgmt_task(conn, mtask); + list_for_each_entry_safe(task, tmp, &conn->mgmtqueue, running) { + debug_scsi("flushing pending mgmt task itt 0x%x\n", task->itt); + /* release ref from prep task */ + __iscsi_put_task(task); } /* handle running */ - list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) { - debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt); - iscsi_free_mgmt_task(conn, mtask); + list_for_each_entry_safe(task, tmp, &conn->mgmt_run_list, running) { + debug_scsi("flushing running mgmt task itt 0x%x\n", task->itt); + /* release ref from prep task */ + __iscsi_put_task(task); } - conn->mtask = NULL; + conn->task = NULL; } static void iscsi_start_session_recovery(struct iscsi_session *session, @@ -2182,17 +2299,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, } /* - * The LLD either freed/unset the lock on us, or userspace called - * stop but did not create a proper connection (connection was never - * bound or it was unbound then stop was called). - */ - if (!conn->recv_lock) { - spin_unlock_bh(&session->lock); - mutex_unlock(&session->eh_mutex); - return; - } - - /* * When this is called for the in_login state, we only want to clean * up the login task and connection. We do not need to block and set * the recovery state again @@ -2208,11 +2314,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, spin_unlock_bh(&session->lock); iscsi_suspend_tx(conn); - - write_lock_bh(conn->recv_lock); - set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); - write_unlock_bh(conn->recv_lock); - /* * for connection level recovery we should not calculate * header digest. conn->hdr_size used for optimization @@ -2225,7 +2326,7 @@ static void iscsi_start_session_recovery(struct iscsi_session *session, if (session->state == ISCSI_STATE_IN_RECOVERY && old_stop_stage != STOP_CONN_RECOVER) { debug_scsi("blocking session\n"); - iscsi_block_session(session_to_cls(session)); + iscsi_block_session(session->cls_session); } } @@ -2260,7 +2361,7 @@ EXPORT_SYMBOL_GPL(iscsi_conn_stop); int iscsi_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, int is_leading) { - struct iscsi_session *session = class_to_transport_session(cls_session); + struct iscsi_session *session = cls_session->dd_data; struct iscsi_conn *conn = cls_conn->dd_data; spin_lock_bh(&session->lock); @@ -2399,6 +2500,14 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn, if (!conn->persistent_address) return -ENOMEM; break; + case ISCSI_PARAM_IFACE_NAME: + if (!session->ifacename) + session->ifacename = kstrdup(buf, GFP_KERNEL); + break; + case ISCSI_PARAM_INITIATOR_NAME: + if (!session->initiatorname) + session->initiatorname = kstrdup(buf, GFP_KERNEL); + break; default: return -ENOSYS; } @@ -2410,8 +2519,7 @@ EXPORT_SYMBOL_GPL(iscsi_set_param); int iscsi_session_get_param(struct iscsi_cls_session *cls_session, enum iscsi_param param, char *buf) { - struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_session *session = cls_session->dd_data; int len; switch(param) { @@ -2466,6 +2574,15 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session, case ISCSI_PARAM_PASSWORD_IN: len = sprintf(buf, "%s\n", session->password_in); break; + case ISCSI_PARAM_IFACE_NAME: + len = sprintf(buf, "%s\n", session->ifacename); + break; + case ISCSI_PARAM_INITIATOR_NAME: + if (!session->initiatorname) + len = sprintf(buf, "%s\n", "unknown"); + else + len = sprintf(buf, "%s\n", session->initiatorname); + break; default: return -ENOSYS; } @@ -2525,29 +2642,35 @@ EXPORT_SYMBOL_GPL(iscsi_conn_get_param); int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, char *buf) { - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_host *ihost = shost_priv(shost); int len; switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: - if (!session->netdev) + if (!ihost->netdev) len = sprintf(buf, "%s\n", "default"); else - len = sprintf(buf, "%s\n", session->netdev); + len = sprintf(buf, "%s\n", ihost->netdev); break; case ISCSI_HOST_PARAM_HWADDRESS: - if (!session->hwaddress) + if (!ihost->hwaddress) len = sprintf(buf, "%s\n", "default"); else - len = sprintf(buf, "%s\n", session->hwaddress); + len = sprintf(buf, "%s\n", ihost->hwaddress); break; case ISCSI_HOST_PARAM_INITIATOR_NAME: - if (!session->initiatorname) + if (!ihost->initiatorname) len = sprintf(buf, "%s\n", "unknown"); else - len = sprintf(buf, "%s\n", session->initiatorname); + len = sprintf(buf, "%s\n", ihost->initiatorname); + break; + case ISCSI_HOST_PARAM_IPADDRESS: + if (!strlen(ihost->local_address)) + len = sprintf(buf, "%s\n", "unknown"); + else + len = sprintf(buf, "%s\n", + ihost->local_address); break; - default: return -ENOSYS; } @@ -2559,20 +2682,20 @@ EXPORT_SYMBOL_GPL(iscsi_host_get_param); int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param, char *buf, int buflen) { - struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + struct iscsi_host *ihost = shost_priv(shost); switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: - if (!session->netdev) - session->netdev = kstrdup(buf, GFP_KERNEL); + if (!ihost->netdev) + ihost->netdev = kstrdup(buf, GFP_KERNEL); break; case ISCSI_HOST_PARAM_HWADDRESS: - if (!session->hwaddress) - session->hwaddress = kstrdup(buf, GFP_KERNEL); + if (!ihost->hwaddress) + ihost->hwaddress = kstrdup(buf, GFP_KERNEL); break; case ISCSI_HOST_PARAM_INITIATOR_NAME: - if (!session->initiatorname) - session->initiatorname = kstrdup(buf, GFP_KERNEL); + if (!ihost->initiatorname) + ihost->initiatorname = kstrdup(buf, GFP_KERNEL); break; default: return -ENOSYS; diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index ec0b0f6e5e1..e0e018d1265 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -33,6 +33,7 @@ struct lpfc_sli2_slim; #define LPFC_MAX_SG_SEG_CNT 256 /* sg element count per scsi cmnd */ #define LPFC_IOCB_LIST_CNT 2250 /* list of IOCBs for fast-path usage. */ #define LPFC_Q_RAMP_UP_INTERVAL 120 /* lun q_depth ramp up interval */ +#define LPFC_VNAME_LEN 100 /* vport symbolic name length */ /* * Following time intervals are used of adjusting SCSI device @@ -59,6 +60,9 @@ struct lpfc_sli2_slim; #define MAX_HBAEVT 32 +/* lpfc wait event data ready flag */ +#define LPFC_DATA_READY (1<<0) + enum lpfc_polling_flags { ENABLE_FCP_RING_POLLING = 0x1, DISABLE_FCP_RING_INT = 0x2 @@ -425,9 +429,6 @@ struct lpfc_hba { uint16_t pci_cfg_value; - uint8_t work_found; -#define LPFC_MAX_WORKER_ITERATION 4 - uint8_t fc_linkspeed; /* Link speed after last READ_LA */ uint32_t fc_eventTag; /* event tag for link attention */ @@ -489,8 +490,9 @@ struct lpfc_hba { uint32_t work_hs; /* HS stored in case of ERRAT */ uint32_t work_status[2]; /* Extra status from SLIM */ - wait_queue_head_t *work_wait; + wait_queue_head_t work_waitq; struct task_struct *worker_thread; + long data_flags; uint32_t hbq_in_use; /* HBQs in use flag */ struct list_head hbqbuf_in_list; /* in-fly hbq buffer list */ @@ -637,6 +639,17 @@ lpfc_is_link_up(struct lpfc_hba *phba) phba->link_state == LPFC_HBA_READY; } +static inline void +lpfc_worker_wake_up(struct lpfc_hba *phba) +{ + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + + /* Wake up worker thread */ + wake_up(&phba->work_waitq); + return; +} + #define FC_REG_DUMP_EVENT 0x10 /* Register for Dump events */ #define FC_REG_TEMPERATURE_EVENT 0x20 /* Register for temperature event */ diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 960baaf11fb..37bfa0bd1da 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -1995,8 +1995,7 @@ sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr, /* Don't allow mailbox commands to be sent when blocked * or when in the middle of discovery */ - if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO || - vport->fc_flag & FC_NDISC_ACTIVE) { + if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) { sysfs_mbox_idle(phba); spin_unlock_irq(&phba->hbalock); return -EAGAIN; diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h index 7c9f8317d97..1b8245213b8 100644 --- a/drivers/scsi/lpfc/lpfc_crtn.h +++ b/drivers/scsi/lpfc/lpfc_crtn.h @@ -142,7 +142,7 @@ int lpfc_config_port_post(struct lpfc_hba *); int lpfc_hba_down_prep(struct lpfc_hba *); int lpfc_hba_down_post(struct lpfc_hba *); void lpfc_hba_init(struct lpfc_hba *, uint32_t *); -int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int, int); +int lpfc_post_buffer(struct lpfc_hba *, struct lpfc_sli_ring *, int); void lpfc_decode_firmware_rev(struct lpfc_hba *, char *, int); int lpfc_online(struct lpfc_hba *); void lpfc_unblock_mgmt_io(struct lpfc_hba *); @@ -263,6 +263,7 @@ extern int lpfc_sli_mode; extern int lpfc_enable_npiv; int lpfc_vport_symbolic_node_name(struct lpfc_vport *, char *, size_t); +int lpfc_vport_symbolic_port_name(struct lpfc_vport *, char *, size_t); void lpfc_terminate_rport_io(struct fc_rport *); void lpfc_dev_loss_tmo_callbk(struct fc_rport *rport); diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c index 153afae567b..7fc74cf5823 100644 --- a/drivers/scsi/lpfc/lpfc_ct.c +++ b/drivers/scsi/lpfc/lpfc_ct.c @@ -101,7 +101,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, /* Not enough posted buffers; Try posting more buffers */ phba->fc_stat.NoRcvBuf++; if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) - lpfc_post_buffer(phba, pring, 2, 1); + lpfc_post_buffer(phba, pring, 2); return; } @@ -151,7 +151,7 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, } list_del(&iocbq->list); lpfc_sli_release_iocbq(phba, iocbq); - lpfc_post_buffer(phba, pring, i, 1); + lpfc_post_buffer(phba, pring, i); } } } @@ -990,7 +990,7 @@ lpfc_cmpl_ct_cmd_rff_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, return; } -static int +int lpfc_vport_symbolic_port_name(struct lpfc_vport *vport, char *symbol, size_t size) { @@ -1679,20 +1679,18 @@ lpfc_fdmi_tmo(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *)ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long iflag; spin_lock_irqsave(&vport->work_port_lock, iflag); - if (!(vport->work_port_events & WORKER_FDMI_TMO)) { + tmo_posted = vport->work_port_events & WORKER_FDMI_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_FDMI_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + spin_unlock_irqrestore(&vport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } - else - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } void diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 886c5f1b11d..f54e0f7eaee 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -1754,29 +1754,34 @@ lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp) struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_work_evt *evtp; + if (!(nlp->nlp_flag & NLP_DELAY_TMO)) + return; spin_lock_irq(shost->host_lock); nlp->nlp_flag &= ~NLP_DELAY_TMO; spin_unlock_irq(shost->host_lock); del_timer_sync(&nlp->nlp_delayfunc); nlp->nlp_last_elscmd = 0; - if (!list_empty(&nlp->els_retry_evt.evt_listp)) { list_del_init(&nlp->els_retry_evt.evt_listp); /* Decrement nlp reference count held for the delayed retry */ evtp = &nlp->els_retry_evt; lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1); } - if (nlp->nlp_flag & NLP_NPR_2B_DISC) { spin_lock_irq(shost->host_lock); nlp->nlp_flag &= ~NLP_NPR_2B_DISC; spin_unlock_irq(shost->host_lock); if (vport->num_disc_nodes) { - /* Check to see if there are more - * PLOGIs to be sent - */ - lpfc_more_plogi(vport); - + if (vport->port_state < LPFC_VPORT_READY) { + /* Check if there are more ADISCs to be sent */ + lpfc_more_adisc(vport); + if ((vport->num_disc_nodes == 0) && + (vport->fc_npr_cnt)) + lpfc_els_disc_plogi(vport); + } else { + /* Check if there are more PLOGIs to be sent */ + lpfc_more_plogi(vport); + } if (vport->num_disc_nodes == 0) { spin_lock_irq(shost->host_lock); vport->fc_flag &= ~FC_NDISC_ACTIVE; @@ -1798,10 +1803,6 @@ lpfc_els_retry_delay(unsigned long ptr) unsigned long flags; struct lpfc_work_evt *evtp = &ndlp->els_retry_evt; - ndlp = (struct lpfc_nodelist *) ptr; - phba = ndlp->vport->phba; - evtp = &ndlp->els_retry_evt; - spin_lock_irqsave(&phba->hbalock, flags); if (!list_empty(&evtp->evt_listp)) { spin_unlock_irqrestore(&phba->hbalock, flags); @@ -1812,11 +1813,11 @@ lpfc_els_retry_delay(unsigned long ptr) * count until the queued work is done */ evtp->evt_arg1 = lpfc_nlp_get(ndlp); - evtp->evt = LPFC_EVT_ELS_RETRY; - list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) + if (evtp->evt_arg1) { + evtp->evt = LPFC_EVT_ELS_RETRY; + list_add_tail(&evtp->evt_listp, &phba->work_list); lpfc_worker_wake_up(phba); - + } spin_unlock_irqrestore(&phba->hbalock, flags); return; } @@ -2761,10 +2762,11 @@ lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb, npr = (PRLI *) pcmd; vpd = &phba->vpd; /* - * If our firmware version is 3.20 or later, - * set the following bits for FC-TAPE support. + * If the remote port is a target and our firmware version is 3.20 or + * later, set the following bits for FC-TAPE support. */ - if (vpd->rev.feaLevelHigh >= 0x02) { + if ((ndlp->nlp_type & NLP_FCP_TARGET) && + (vpd->rev.feaLevelHigh >= 0x02)) { npr->ConfmComplAllowed = 1; npr->Retry = 1; npr->TaskRetryIdReq = 1; @@ -3056,27 +3058,16 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport) { struct lpfc_nodelist *ndlp = NULL; - /* Look at all nodes effected by pending RSCNs and move - * them to NPR state. - */ - + /* Move all affected nodes by pending RSCNs to NPR state. */ list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { if (!NLP_CHK_NODE_ACT(ndlp) || - ndlp->nlp_state == NLP_STE_UNUSED_NODE || - lpfc_rscn_payload_check(vport, ndlp->nlp_DID) == 0) + (ndlp->nlp_state == NLP_STE_UNUSED_NODE) || + !lpfc_rscn_payload_check(vport, ndlp->nlp_DID)) continue; - lpfc_disc_state_machine(vport, ndlp, NULL, - NLP_EVT_DEVICE_RECOVERY); - - /* - * Make sure NLP_DELAY_TMO is NOT running after a device - * recovery event. - */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + NLP_EVT_DEVICE_RECOVERY); + lpfc_cancel_retry_delay_tmo(vport, ndlp); } - return 0; } @@ -3781,91 +3772,27 @@ static int lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb, struct lpfc_nodelist *fan_ndlp) { - struct lpfc_dmabuf *pcmd; + struct lpfc_hba *phba = vport->phba; uint32_t *lp; - IOCB_t *icmd; - uint32_t cmd, did; FAN *fp; - struct lpfc_nodelist *ndlp, *next_ndlp; - struct lpfc_hba *phba = vport->phba; - - /* FAN received */ - lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, - "0265 FAN received\n"); - icmd = &cmdiocb->iocb; - did = icmd->un.elsreq64.remoteID; - pcmd = (struct lpfc_dmabuf *)cmdiocb->context2; - lp = (uint32_t *)pcmd->virt; - - cmd = *lp++; - fp = (FAN *) lp; + lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n"); + lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt; + fp = (FAN *) ++lp; /* FAN received; Fan does not have a reply sequence */ - - if (phba->pport->port_state == LPFC_LOCAL_CFG_LINK) { + if ((vport == phba->pport) && + (vport->port_state == LPFC_LOCAL_CFG_LINK)) { if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName, - sizeof(struct lpfc_name)) != 0) || + sizeof(struct lpfc_name))) || (memcmp(&phba->fc_fabparam.portName, &fp->FportName, - sizeof(struct lpfc_name)) != 0)) { - /* - * This node has switched fabrics. FLOGI is required - * Clean up the old rpi's - */ - - list_for_each_entry_safe(ndlp, next_ndlp, - &vport->fc_nodes, nlp_listp) { - if (!NLP_CHK_NODE_ACT(ndlp)) - continue; - if (ndlp->nlp_state != NLP_STE_NPR_NODE) - continue; - if (ndlp->nlp_type & NLP_FABRIC) { - /* - * Clean up old Fabric, Nameserver and - * other NLP_FABRIC logins - */ - lpfc_drop_node(vport, ndlp); - - } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) { - /* Fail outstanding I/O now since this - * device is marked for PLOGI - */ - lpfc_unreg_rpi(vport, ndlp); - } - } - + sizeof(struct lpfc_name)))) { + /* This port has switched fabrics. FLOGI is required */ lpfc_initial_flogi(vport); - return 0; - } - /* Discovery not needed, - * move the nodes to their original state. - */ - list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, - nlp_listp) { - if (!NLP_CHK_NODE_ACT(ndlp)) - continue; - if (ndlp->nlp_state != NLP_STE_NPR_NODE) - continue; - - switch (ndlp->nlp_prev_state) { - case NLP_STE_UNMAPPED_NODE: - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, - NLP_STE_UNMAPPED_NODE); - break; - - case NLP_STE_MAPPED_NODE: - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, - NLP_STE_MAPPED_NODE); - break; - - default: - break; - } + } else { + /* FAN verified - skip FLOGI */ + vport->fc_myDID = vport->fc_prevDID; + lpfc_issue_fabric_reglogin(vport); } - - /* Start discovery - this should just do CLEAR_LA */ - lpfc_disc_start(vport); } return 0; } @@ -3875,20 +3802,17 @@ lpfc_els_timeout(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *) ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long iflag; spin_lock_irqsave(&vport->work_port_lock, iflag); - if ((vport->work_port_events & WORKER_ELS_TMO) == 0) { + tmo_posted = vport->work_port_events & WORKER_ELS_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_ELS_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + spin_unlock_irqrestore(&vport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } - else - spin_unlock_irqrestore(&vport->work_port_lock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } @@ -3933,9 +3857,6 @@ lpfc_els_timeout_handler(struct lpfc_vport *vport) els_command == ELS_CMD_FDISC) continue; - if (vport != piocb->vport) - continue; - if (piocb->drvrTimeout > 0) { if (piocb->drvrTimeout >= timeout) piocb->drvrTimeout -= timeout; @@ -4089,7 +4010,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt; cmd = *payload; if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0) - lpfc_post_buffer(phba, pring, 1, 1); + lpfc_post_buffer(phba, pring, 1); did = icmd->un.rcvels.remoteID; if (icmd->ulpStatus) { @@ -4398,7 +4319,7 @@ lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, phba->fc_stat.NoRcvBuf++; /* Not enough posted buffers; Try posting more buffers */ if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) - lpfc_post_buffer(phba, pring, 0, 1); + lpfc_post_buffer(phba, pring, 0); return; } @@ -4842,18 +4763,16 @@ lpfc_fabric_block_timeout(unsigned long ptr) struct lpfc_hba *phba = (struct lpfc_hba *) ptr; unsigned long iflags; uint32_t tmo_posted; + spin_lock_irqsave(&phba->pport->work_port_lock, iflags); tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO; if (!tmo_posted) phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags); - if (!tmo_posted) { - spin_lock_irqsave(&phba->hbalock, iflags); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflags); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } static void diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 7cb68feb04f..a98d11bf357 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -153,11 +153,11 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) * count until this queued work is done */ evtp->evt_arg1 = lpfc_nlp_get(ndlp); - evtp->evt = LPFC_EVT_DEV_LOSS; - list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) - wake_up(phba->work_wait); - + if (evtp->evt_arg1) { + evtp->evt = LPFC_EVT_DEV_LOSS; + list_add_tail(&evtp->evt_listp, &phba->work_list); + lpfc_worker_wake_up(phba); + } spin_unlock_irq(&phba->hbalock); return; @@ -276,14 +276,6 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); } - -void -lpfc_worker_wake_up(struct lpfc_hba *phba) -{ - wake_up(phba->work_wait); - return; -} - static void lpfc_work_list_done(struct lpfc_hba *phba) { @@ -429,6 +421,8 @@ lpfc_work_done(struct lpfc_hba *phba) || (pring->flag & LPFC_DEFERRED_RING_EVENT)) { if (pring->flag & LPFC_STOP_IOCB_EVENT) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); } else { pring->flag &= ~LPFC_DEFERRED_RING_EVENT; lpfc_sli_handle_slow_ring_event(phba, pring, @@ -459,69 +453,29 @@ lpfc_work_done(struct lpfc_hba *phba) lpfc_work_list_done(phba); } -static int -check_work_wait_done(struct lpfc_hba *phba) -{ - struct lpfc_vport *vport; - struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; - int rc = 0; - - spin_lock_irq(&phba->hbalock); - list_for_each_entry(vport, &phba->port_list, listentry) { - if (vport->work_port_events) { - rc = 1; - break; - } - } - if (rc || phba->work_ha || (!list_empty(&phba->work_list)) || - kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) { - rc = 1; - phba->work_found++; - } else - phba->work_found = 0; - spin_unlock_irq(&phba->hbalock); - return rc; -} - - int lpfc_do_work(void *p) { struct lpfc_hba *phba = p; int rc; - DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq); set_user_nice(current, -20); - phba->work_wait = &work_waitq; - phba->work_found = 0; + phba->data_flags = 0; while (1) { - - rc = wait_event_interruptible(work_waitq, - check_work_wait_done(phba)); - + /* wait and check worker queue activities */ + rc = wait_event_interruptible(phba->work_waitq, + (test_and_clear_bit(LPFC_DATA_READY, + &phba->data_flags) + || kthread_should_stop())); BUG_ON(rc); if (kthread_should_stop()) break; + /* Attend pending lpfc data processing */ lpfc_work_done(phba); - - /* If there is alot of slow ring work, like during link up - * check_work_wait_done() may cause this thread to not give - * up the CPU for very long periods of time. This may cause - * soft lockups or other problems. To avoid these situations - * give up the CPU here after LPFC_MAX_WORKER_ITERATION - * consecutive iterations. - */ - if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) { - phba->work_found = 0; - schedule(); - } } - spin_lock_irq(&phba->hbalock); - phba->work_wait = NULL; - spin_unlock_irq(&phba->hbalock); return 0; } @@ -551,10 +505,10 @@ lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2, spin_lock_irqsave(&phba->hbalock, flags); list_add_tail(&evtp->evt_listp, &phba->work_list); - if (phba->work_wait) - lpfc_worker_wake_up(phba); spin_unlock_irqrestore(&phba->hbalock, flags); + lpfc_worker_wake_up(phba); + return 1; } @@ -963,6 +917,10 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la) if (phba->fc_topology == TOPOLOGY_LOOP) { phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED; + if (phba->cfg_enable_npiv) + lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT, + "1309 Link Up Event npiv not supported in loop " + "topology\n"); /* Get Loop Map information */ if (la->il) vport->fc_flag |= FC_LBIT; @@ -1087,6 +1045,8 @@ lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) MAILBOX_t *mb = &pmb->mb; struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1); + /* Unblock ELS traffic */ + phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT; /* Check for error */ if (mb->mbxStatus) { lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT, @@ -1650,7 +1610,6 @@ lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp->nlp_DID, old_state, state); if (old_state == NLP_STE_NPR_NODE && - (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 && state != NLP_STE_NPR_NODE) lpfc_cancel_retry_delay_tmo(vport, ndlp); if (old_state == NLP_STE_UNMAPPED_NODE) { @@ -1687,8 +1646,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { struct Scsi_Host *shost = lpfc_shost_from_vport(vport); - if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp)) lpfc_nlp_counters(vport, ndlp->nlp_state, -1); spin_lock_irq(shost->host_lock); @@ -1701,8 +1659,7 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) static void lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { - if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp)) lpfc_nlp_counters(vport, ndlp->nlp_state, -1); lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state, @@ -2121,10 +2078,8 @@ lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) ndlp->nlp_last_elscmd = 0; del_timer_sync(&ndlp->nlp_delayfunc); - if (!list_empty(&ndlp->els_retry_evt.evt_listp)) - list_del_init(&ndlp->els_retry_evt.evt_listp); - if (!list_empty(&ndlp->dev_loss_evt.evt_listp)) - list_del_init(&ndlp->dev_loss_evt.evt_listp); + list_del_init(&ndlp->els_retry_evt.evt_listp); + list_del_init(&ndlp->dev_loss_evt.evt_listp); lpfc_unreg_rpi(vport, ndlp); @@ -2144,10 +2099,7 @@ lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) LPFC_MBOXQ_t *mbox; int rc; - if (ndlp->nlp_flag & NLP_DELAY_TMO) { - lpfc_cancel_retry_delay_tmo(vport, ndlp); - } - + lpfc_cancel_retry_delay_tmo(vport, ndlp); if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) { /* For this case we need to cleanup the default rpi * allocated by the firmware. @@ -2317,8 +2269,7 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did) /* Since this node is marked for discovery, * delay timeout is not needed. */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(vport, ndlp); + lpfc_cancel_retry_delay_tmo(vport, ndlp); } else ndlp = NULL; } else { @@ -2643,21 +2594,20 @@ lpfc_disc_timeout(unsigned long ptr) { struct lpfc_vport *vport = (struct lpfc_vport *) ptr; struct lpfc_hba *phba = vport->phba; + uint32_t tmo_posted; unsigned long flags = 0; if (unlikely(!phba)) return; - if ((vport->work_port_events & WORKER_DISC_TMO) == 0) { - spin_lock_irqsave(&vport->work_port_lock, flags); + spin_lock_irqsave(&vport->work_port_lock, flags); + tmo_posted = vport->work_port_events & WORKER_DISC_TMO; + if (!tmo_posted) vport->work_port_events |= WORKER_DISC_TMO; - spin_unlock_irqrestore(&vport->work_port_lock, flags); + spin_unlock_irqrestore(&vport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, flags); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index fa757b251f8..5b6e5395c8e 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -145,8 +145,10 @@ lpfc_config_port_prep(struct lpfc_hba *phba) return -ERESTART; } - if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) + if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) { + mempool_free(pmb, phba->mbox_mem_pool); return -EINVAL; + } /* Save information as VPD data */ vp->rev.rBit = 1; @@ -551,18 +553,18 @@ static void lpfc_hb_timeout(unsigned long ptr) { struct lpfc_hba *phba; + uint32_t tmo_posted; unsigned long iflag; phba = (struct lpfc_hba *)ptr; spin_lock_irqsave(&phba->pport->work_port_lock, iflag); - if (!(phba->pport->work_port_events & WORKER_HB_TMO)) + tmo_posted = phba->pport->work_port_events & WORKER_HB_TMO; + if (!tmo_posted) phba->pport->work_port_events |= WORKER_HB_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag); - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, iflag); + if (!tmo_posted) + lpfc_worker_wake_up(phba); return; } @@ -851,6 +853,8 @@ lpfc_handle_latt(struct lpfc_hba *phba) lpfc_read_la(phba, pmb, mp); pmb->mbox_cmpl = lpfc_mbx_cmpl_read_la; pmb->vport = vport; + /* Block ELS IOCBs until we have processed this mbox command */ + phba->sli.ring[LPFC_ELS_RING].flag |= LPFC_STOP_IOCB_EVENT; rc = lpfc_sli_issue_mbox (phba, pmb, MBX_NOWAIT); if (rc == MBX_NOT_FINISHED) { rc = 4; @@ -866,6 +870,7 @@ lpfc_handle_latt(struct lpfc_hba *phba) return; lpfc_handle_latt_free_mbuf: + phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT; lpfc_mbuf_free(phba, mp->virt, mp->phys); lpfc_handle_latt_free_mp: kfree(mp); @@ -1194,8 +1199,7 @@ lpfc_get_hba_model_desc(struct lpfc_hba *phba, uint8_t *mdp, uint8_t *descp) /* Returns the number of buffers NOT posted. */ /**************************************************/ int -lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt, - int type) +lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt) { IOCB_t *icmd; struct lpfc_iocbq *iocb; @@ -1295,7 +1299,7 @@ lpfc_post_rcv_buf(struct lpfc_hba *phba) struct lpfc_sli *psli = &phba->sli; /* Ring 0, ELS / CT buffers */ - lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0, 1); + lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0); /* Ring 2 - FCP no buffers needed */ return 0; @@ -1454,6 +1458,15 @@ lpfc_cleanup(struct lpfc_vport *vport) lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); + + /* nlp_type zero is not defined, nlp_flag zero also not defined, + * nlp_state is unused, this happens when + * an initiator has logged + * into us so cleanup this ndlp. + */ + if ((ndlp->nlp_type == 0) && (ndlp->nlp_flag == 0) && + (ndlp->nlp_state == 0)) + lpfc_nlp_put(ndlp); } /* At this point, ALL ndlp's should be gone @@ -2101,6 +2114,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid) phba->work_ha_mask = (HA_ERATT|HA_MBATT|HA_LATT); phba->work_ha_mask |= (HA_RXMASK << (LPFC_ELS_RING * 4)); + /* Initialize the wait queue head for the kernel thread */ + init_waitqueue_head(&phba->work_waitq); + /* Startup the kernel thread for this host adapter. */ phba->worker_thread = kthread_run(lpfc_do_work, phba, "lpfc_worker_%d", phba->brd_no); diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c index d08c4c89074..6688a8689b5 100644 --- a/drivers/scsi/lpfc/lpfc_nportdisc.c +++ b/drivers/scsi/lpfc/lpfc_nportdisc.c @@ -235,10 +235,7 @@ lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) (iocb->iocb_cmpl) (phba, iocb, iocb); } } - - /* If we are delaying issuing an ELS command, cancel it */ - if (ndlp->nlp_flag & NLP_DELAY_TMO) - lpfc_cancel_retry_delay_tmo(phba->pport, ndlp); + lpfc_cancel_retry_delay_tmo(phba->pport, ndlp); return 0; } @@ -249,7 +246,6 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_dmabuf *pcmd; - struct lpfc_work_evt *evtp; uint32_t *lp; IOCB_t *icmd; struct serv_parm *sp; @@ -425,73 +421,8 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp, mbox); return 1; } - - /* If the remote NPort logs into us, before we can initiate - * discovery to them, cleanup the NPort from discovery accordingly. - */ - if (ndlp->nlp_state == NLP_STE_NPR_NODE) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_DELAY_TMO; - spin_unlock_irq(shost->host_lock); - del_timer_sync(&ndlp->nlp_delayfunc); - ndlp->nlp_last_elscmd = 0; - - if (!list_empty(&ndlp->els_retry_evt.evt_listp)) { - list_del_init(&ndlp->els_retry_evt.evt_listp); - /* Decrement ndlp reference count held for the - * delayed retry - */ - evtp = &ndlp->els_retry_evt; - lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1); - } - - if (ndlp->nlp_flag & NLP_NPR_2B_DISC) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; - spin_unlock_irq(shost->host_lock); - - if ((ndlp->nlp_flag & NLP_ADISC_SND) && - (vport->num_disc_nodes)) { - /* Check to see if there are more - * ADISCs to be sent - */ - lpfc_more_adisc(vport); - - if ((vport->num_disc_nodes == 0) && - (vport->fc_npr_cnt)) - lpfc_els_disc_plogi(vport); - - if (vport->num_disc_nodes == 0) { - spin_lock_irq(shost->host_lock); - vport->fc_flag &= ~FC_NDISC_ACTIVE; - spin_unlock_irq(shost->host_lock); - lpfc_can_disctmo(vport); - lpfc_end_rscn(vport); - } - } - } - } else if ((ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) && - (ndlp->nlp_flag & NLP_NPR_2B_DISC) && - (vport->num_disc_nodes)) { - spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; - spin_unlock_irq(shost->host_lock); - /* Check to see if there are more - * PLOGIs to be sent - */ - lpfc_more_plogi(vport); - if (vport->num_disc_nodes == 0) { - spin_lock_irq(shost->host_lock); - vport->fc_flag &= ~FC_NDISC_ACTIVE; - spin_unlock_irq(shost->host_lock); - lpfc_can_disctmo(vport); - lpfc_end_rscn(vport); - } - } - lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox); return 1; - out: stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC; stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE; @@ -574,7 +505,9 @@ lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, else lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL); - if (!(ndlp->nlp_type & NLP_FABRIC) || + if ((!(ndlp->nlp_type & NLP_FABRIC) && + ((ndlp->nlp_type & NLP_FCP_TARGET) || + !(ndlp->nlp_type & NLP_FCP_INITIATOR))) || (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) { /* Only try to re-login if this is NOT a Fabric Node */ mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1); @@ -751,6 +684,7 @@ static uint32_t lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { + struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *cmdiocb = arg; struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2; @@ -776,7 +710,22 @@ lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL); } else { - lpfc_rcv_plogi(vport, ndlp, cmdiocb); + if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) && + (ndlp->nlp_flag & NLP_NPR_2B_DISC) && + (vport->num_disc_nodes)) { + spin_lock_irq(shost->host_lock); + ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; + spin_unlock_irq(shost->host_lock); + /* Check if there are more PLOGIs to be sent */ + lpfc_more_plogi(vport); + if (vport->num_disc_nodes == 0) { + spin_lock_irq(shost->host_lock); + vport->fc_flag &= ~FC_NDISC_ACTIVE; + spin_unlock_irq(shost->host_lock); + lpfc_can_disctmo(vport); + lpfc_end_rscn(vport); + } + } } /* If our portname was less */ return ndlp->nlp_state; @@ -1040,6 +989,7 @@ static uint32_t lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, void *arg, uint32_t evt) { + struct Scsi_Host *shost = lpfc_shost_from_vport(vport); struct lpfc_hba *phba = vport->phba; struct lpfc_iocbq *cmdiocb; @@ -1048,9 +998,28 @@ lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, cmdiocb = (struct lpfc_iocbq *) arg; - if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) - return ndlp->nlp_state; + if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) { + if (ndlp->nlp_flag & NLP_NPR_2B_DISC) { + spin_lock_irq(shost->host_lock); + ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; + spin_unlock_irq(shost->host_lock); + if (vport->num_disc_nodes) { + lpfc_more_adisc(vport); + if ((vport->num_disc_nodes == 0) && + (vport->fc_npr_cnt)) + lpfc_els_disc_plogi(vport); + if (vport->num_disc_nodes == 0) { + spin_lock_irq(shost->host_lock); + vport->fc_flag &= ~FC_NDISC_ACTIVE; + spin_unlock_irq(shost->host_lock); + lpfc_can_disctmo(vport); + lpfc_end_rscn(vport); + } + } + } + return ndlp->nlp_state; + } ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE; lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); @@ -1742,24 +1711,21 @@ lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg; /* Ignore PLOGI if we have an outstanding LOGO */ - if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC)) { + if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC)) return ndlp->nlp_state; - } - if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) { + lpfc_cancel_retry_delay_tmo(vport, ndlp); spin_lock_irq(shost->host_lock); - ndlp->nlp_flag &= ~NLP_NPR_ADISC; + ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC); spin_unlock_irq(shost->host_lock); - return ndlp->nlp_state; - } - - /* send PLOGI immediately, move to PLOGI issue state */ - if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) { - ndlp->nlp_prev_state = NLP_STE_NPR_NODE; - lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); - lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); + } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) { + /* send PLOGI immediately, move to PLOGI issue state */ + if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) { + ndlp->nlp_prev_state = NLP_STE_NPR_NODE; + lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE); + lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0); + } } - return ndlp->nlp_state; } @@ -1810,7 +1776,6 @@ lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg; lpfc_rcv_padisc(vport, ndlp, cmdiocb); - /* * Do not start discovery if discovery is about to start * or discovery in progress for this node. Starting discovery @@ -1973,9 +1938,7 @@ lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, spin_lock_irq(shost->host_lock); ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC); spin_unlock_irq(shost->host_lock); - if (ndlp->nlp_flag & NLP_DELAY_TMO) { - lpfc_cancel_retry_delay_tmo(vport, ndlp); - } + lpfc_cancel_retry_delay_tmo(vport, ndlp); return ndlp->nlp_state; } diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 0910a9ab76a..c94da4f2b8a 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -50,6 +50,7 @@ void lpfc_adjust_queue_depth(struct lpfc_hba *phba) { unsigned long flags; + uint32_t evt_posted; spin_lock_irqsave(&phba->hbalock, flags); atomic_inc(&phba->num_rsrc_err); @@ -65,17 +66,13 @@ lpfc_adjust_queue_depth(struct lpfc_hba *phba) spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); - if ((phba->pport->work_port_events & - WORKER_RAMP_DOWN_QUEUE) == 0) { + evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; + if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; - } spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, flags); - + if (!evt_posted) + lpfc_worker_wake_up(phba); return; } @@ -89,6 +86,7 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport, { unsigned long flags; struct lpfc_hba *phba = vport->phba; + uint32_t evt_posted; atomic_inc(&phba->num_cmd_success); if (vport->cfg_lun_queue_depth <= sdev->queue_depth) @@ -103,16 +101,14 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport, spin_unlock_irqrestore(&phba->hbalock, flags); spin_lock_irqsave(&phba->pport->work_port_lock, flags); - if ((phba->pport->work_port_events & - WORKER_RAMP_UP_QUEUE) == 0) { + evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; + if (!evt_posted) phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; - } spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); - spin_lock_irqsave(&phba->hbalock, flags); - if (phba->work_wait) - wake_up(phba->work_wait); - spin_unlock_irqrestore(&phba->hbalock, flags); + if (!evt_posted) + lpfc_worker_wake_up(phba); + return; } void @@ -609,9 +605,6 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, result = cmd->result; sdev = cmd->device; lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); - spin_lock_irqsave(sdev->host->host_lock, flags); - lpfc_cmd->pCmd = NULL; /* This must be done before scsi_done */ - spin_unlock_irqrestore(sdev->host->host_lock, flags); cmd->scsi_done(cmd); if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { @@ -620,6 +613,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, * wake up the thread. */ spin_lock_irqsave(sdev->host->host_lock, flags); + lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(sdev->host->host_lock, flags); @@ -690,6 +684,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, * wake up the thread. */ spin_lock_irqsave(sdev->host->host_lock, flags); + lpfc_cmd->pCmd = NULL; if (lpfc_cmd->waitq) wake_up(lpfc_cmd->waitq); spin_unlock_irqrestore(sdev->host->host_lock, flags); @@ -849,14 +844,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, struct lpfc_iocbq *iocbq; struct lpfc_iocbq *iocbqrsp; int ret; + int status; if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) return FAILED; lpfc_cmd->rdata = rdata; - ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, + status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, FCP_TARGET_RESET); - if (!ret) + if (!status) return FAILED; iocbq = &lpfc_cmd->cur_iocbq; @@ -869,12 +865,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0702 Issue Target Reset to TGT %d Data: x%x x%x\n", tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag); - ret = lpfc_sli_issue_iocb_wait(phba, + status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); - if (ret != IOCB_SUCCESS) { - if (ret == IOCB_TIMEDOUT) + if (status != IOCB_SUCCESS) { + if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; + ret = TIMEOUT_ERROR; + } else + ret = FAILED; lpfc_cmd->status = IOSTAT_DRIVER_REJECT; } else { ret = SUCCESS; @@ -1142,121 +1141,96 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd) struct lpfc_iocbq *iocbq, *iocbqrsp; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *pnode = rdata->pnode; - uint32_t cmd_result = 0, cmd_status = 0; - int ret = FAILED; - int iocb_status = IOCB_SUCCESS; - int cnt, loopcnt; + unsigned long later; + int ret = SUCCESS; + int status; + int cnt; lpfc_block_error_handler(cmnd); - loopcnt = 0; /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or devloss timeout expires. */ - while (1) { + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies)) { if (!pnode || !NLP_CHK_NODE_ACT(pnode)) - goto out; - - if (pnode->nlp_state != NLP_STE_MAPPED_NODE) { - schedule_timeout_uninterruptible(msecs_to_jiffies(500)); - loopcnt++; - rdata = cmnd->device->hostdata; - if (!rdata || - (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){ - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0721 LUN Reset rport " - "failure: cnt x%x rdata x%p\n", - loopcnt, rdata); - goto out; - } - pnode = rdata->pnode; - if (!pnode || !NLP_CHK_NODE_ACT(pnode)) - goto out; - } + return FAILED; if (pnode->nlp_state == NLP_STE_MAPPED_NODE) break; + schedule_timeout_uninterruptible(msecs_to_jiffies(500)); + rdata = cmnd->device->hostdata; + if (!rdata) + break; + pnode = rdata->pnode; + } + if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, + "0721 LUN Reset rport " + "failure: msec x%x rdata x%p\n", + jiffies_to_msecs(jiffies - later), rdata); + return FAILED; } - lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) - goto out; - + return FAILED; lpfc_cmd->timeout = 60; lpfc_cmd->rdata = rdata; - ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun, - FCP_TARGET_RESET); - if (!ret) - goto out_free_scsi_buf; - + status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, + cmnd->device->lun, + FCP_TARGET_RESET); + if (!status) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } iocbq = &lpfc_cmd->cur_iocbq; /* get a buffer for this IOCB command response */ iocbqrsp = lpfc_sli_get_iocbq(phba); - if (iocbqrsp == NULL) - goto out_free_scsi_buf; - + if (iocbqrsp == NULL) { + lpfc_release_scsi_buf(phba, lpfc_cmd); + return FAILED; + } lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0703 Issue target reset to TGT %d LUN %d " "rpi x%x nlp_flag x%x\n", cmnd->device->id, cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag); - iocb_status = lpfc_sli_issue_iocb_wait(phba, - &phba->sli.ring[phba->sli.fcp_ring], - iocbq, iocbqrsp, lpfc_cmd->timeout); - - if (iocb_status == IOCB_TIMEDOUT) + status = lpfc_sli_issue_iocb_wait(phba, + &phba->sli.ring[phba->sli.fcp_ring], + iocbq, iocbqrsp, lpfc_cmd->timeout); + if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; - - if (iocb_status == IOCB_SUCCESS) - ret = SUCCESS; - else - ret = iocb_status; - - cmd_result = iocbqrsp->iocb.un.ulpWord[4]; - cmd_status = iocbqrsp->iocb.ulpStatus; - + ret = TIMEOUT_ERROR; + } else { + if (status != IOCB_SUCCESS) + ret = FAILED; + lpfc_release_scsi_buf(phba, lpfc_cmd); + } + lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, + "0713 SCSI layer issued device reset (%d, %d) " + "return x%x status x%x result x%x\n", + cmnd->device->id, cmnd->device->lun, ret, + iocbqrsp->iocb.ulpStatus, + iocbqrsp->iocb.un.ulpWord[4]); lpfc_sli_release_iocbq(phba, iocbqrsp); - - /* - * All outstanding txcmplq I/Os should have been aborted by the device. - * Unfortunately, some targets do not abide by this forcing the driver - * to double check. - */ cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, - LPFC_CTX_LUN); + LPFC_CTX_TGT); if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, - LPFC_CTX_LUN); - loopcnt = 0; - while(cnt) { - schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); - - if (++loopcnt - > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT) - break; - + LPFC_CTX_TGT); + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies) && cnt) { + schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, - cmnd->device->lun, LPFC_CTX_LUN); + cmnd->device->lun, LPFC_CTX_TGT); } - if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0719 device reset I/O flush failure: " "cnt x%x\n", cnt); ret = FAILED; } - -out_free_scsi_buf: - if (iocb_status != IOCB_TIMEDOUT) { - lpfc_release_scsi_buf(phba, lpfc_cmd); - } - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0713 SCSI layer issued device reset (%d, %d) " - "return x%x status x%x result x%x\n", - cmnd->device->id, cmnd->device->lun, ret, - cmd_status, cmd_result); -out: return ret; } @@ -1268,19 +1242,12 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) struct lpfc_hba *phba = vport->phba; struct lpfc_nodelist *ndlp = NULL; int match; - int ret = FAILED, i, err_count = 0; - int cnt, loopcnt; + int ret = SUCCESS, status, i; + int cnt; struct lpfc_scsi_buf * lpfc_cmd; + unsigned long later; lpfc_block_error_handler(cmnd); - - lpfc_cmd = lpfc_get_scsi_buf(phba); - if (lpfc_cmd == NULL) - goto out; - - /* The lpfc_cmd storage is reused. Set all loop invariants. */ - lpfc_cmd->timeout = 60; - /* * Since the driver manages a single bus device, reset all * targets known to the driver. Should any target reset @@ -1294,7 +1261,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) if (!NLP_CHK_NODE_ACT(ndlp)) continue; if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && - i == ndlp->nlp_sid && + ndlp->nlp_sid == i && ndlp->rport) { match = 1; break; @@ -1303,27 +1270,22 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) spin_unlock_irq(shost->host_lock); if (!match) continue; - - ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, - cmnd->device->lun, - ndlp->rport->dd_data); - if (ret != SUCCESS) { + lpfc_cmd = lpfc_get_scsi_buf(phba); + if (lpfc_cmd) { + lpfc_cmd->timeout = 60; + status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, + cmnd->device->lun, + ndlp->rport->dd_data); + if (status != TIMEOUT_ERROR) + lpfc_release_scsi_buf(phba, lpfc_cmd); + } + if (!lpfc_cmd || status != SUCCESS) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0700 Bus Reset on target %d failed\n", i); - err_count++; - break; + ret = FAILED; } } - - if (ret != IOCB_TIMEDOUT) - lpfc_release_scsi_buf(phba, lpfc_cmd); - - if (err_count == 0) - ret = SUCCESS; - else - ret = FAILED; - /* * All outstanding txcmplq I/Os should have been aborted by * the targets. Unfortunately, some targets do not abide by @@ -1333,27 +1295,19 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, LPFC_CTX_HOST); - loopcnt = 0; - while(cnt) { - schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); - - if (++loopcnt - > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT) - break; - + later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; + while (time_after(later, jiffies) && cnt) { + schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); } - if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0715 Bus Reset I/O flush failure: " "cnt x%x left x%x\n", cnt, i); ret = FAILED; } - lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); -out: return ret; } diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 70a0a9eab21..f40aa7b905f 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -324,9 +324,7 @@ lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring) phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; - /* hbalock should already be held */ - if (phba->work_wait) - lpfc_worker_wake_up(phba); + lpfc_worker_wake_up(phba); return NULL; } @@ -1309,9 +1307,7 @@ lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring) phba->work_ha |= HA_ERATT; phba->work_hs = HS_FFER3; - /* hbalock should already be held */ - if (phba->work_wait) - lpfc_worker_wake_up(phba); + lpfc_worker_wake_up(phba); return; } @@ -2611,12 +2607,9 @@ lpfc_mbox_timeout(unsigned long ptr) phba->pport->work_port_events |= WORKER_MBOX_TMO; spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag); - if (!tmo_posted) { - spin_lock_irqsave(&phba->hbalock, iflag); - if (phba->work_wait) - lpfc_worker_wake_up(phba); - spin_unlock_irqrestore(&phba->hbalock, iflag); - } + if (!tmo_posted) + lpfc_worker_wake_up(phba); + return; } void @@ -3374,8 +3367,12 @@ lpfc_sli_host_down(struct lpfc_vport *vport) for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; prev_pring_flag = pring->flag; - if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */ + /* Only slow rings */ + if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + } /* * Error everything on the txq since these iocbs have not been * given to the FW yet. @@ -3434,8 +3431,12 @@ lpfc_sli_hba_down(struct lpfc_hba *phba) spin_lock_irqsave(&phba->hbalock, flags); for (i = 0; i < psli->num_rings; i++) { pring = &psli->ring[i]; - if (pring->ringno == LPFC_ELS_RING) /* Only slow rings */ + /* Only slow rings */ + if (pring->ringno == LPFC_ELS_RING) { pring->flag |= LPFC_DEFERRED_RING_EVENT; + /* Set the lpfc data pending flag */ + set_bit(LPFC_DATA_READY, &phba->data_flags); + } /* * Error everything on the txq since these iocbs have not been @@ -3762,7 +3763,6 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport, lpfc_ctx_cmd ctx_cmd) { struct lpfc_scsi_buf *lpfc_cmd; - struct scsi_cmnd *cmnd; int rc = 1; if (!(iocbq->iocb_flag & LPFC_IO_FCP)) @@ -3772,19 +3772,20 @@ lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport, return rc; lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); - cmnd = lpfc_cmd->pCmd; - if (cmnd == NULL) + if (lpfc_cmd->pCmd == NULL) return rc; switch (ctx_cmd) { case LPFC_CTX_LUN: - if ((cmnd->device->id == tgt_id) && - (cmnd->device->lun == lun_id)) + if ((lpfc_cmd->rdata->pnode) && + (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) && + (scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id)) rc = 0; break; case LPFC_CTX_TGT: - if (cmnd->device->id == tgt_id) + if ((lpfc_cmd->rdata->pnode) && + (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id)) rc = 0; break; case LPFC_CTX_HOST: @@ -3994,6 +3995,7 @@ lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq, if (pmboxq->context1) return MBX_NOT_FINISHED; + pmboxq->mbox_flag &= ~LPFC_MBX_WAKE; /* setup wake call as IOCB callback */ pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait; /* setup context field to pass wait_queue pointer to wake function */ @@ -4159,7 +4161,7 @@ lpfc_intr_handler(int irq, void *dev_id) "pwork:x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) - phba->work_wait)); + &phba->work_waitq)); control &= ~(HC_R0INT_ENA << LPFC_ELS_RING); @@ -4172,7 +4174,7 @@ lpfc_intr_handler(int irq, void *dev_id) "x%x hawork:x%x wait:x%x", phba->work_ha, work_ha_copy, (uint32_t)((unsigned long) - phba->work_wait)); + &phba->work_waitq)); } spin_unlock(&phba->hbalock); } @@ -4297,9 +4299,8 @@ send_current_mbox: spin_lock(&phba->hbalock); phba->work_ha |= work_ha_copy; - if (phba->work_wait) - lpfc_worker_wake_up(phba); spin_unlock(&phba->hbalock); + lpfc_worker_wake_up(phba); } ha_copy &= ~(phba->work_ha_mask); diff --git a/drivers/scsi/lpfc/lpfc_version.h b/drivers/scsi/lpfc/lpfc_version.h index b22b893019f..ad24cacfbe1 100644 --- a/drivers/scsi/lpfc/lpfc_version.h +++ b/drivers/scsi/lpfc/lpfc_version.h @@ -18,7 +18,7 @@ * included with this package. * *******************************************************************/ -#define LPFC_DRIVER_VERSION "8.2.6" +#define LPFC_DRIVER_VERSION "8.2.7" #define LPFC_DRIVER_NAME "lpfc" diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c index 6feaf59b0b1..109f89d9883 100644 --- a/drivers/scsi/lpfc/lpfc_vport.c +++ b/drivers/scsi/lpfc/lpfc_vport.c @@ -216,6 +216,7 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable) int vpi; int rc = VPORT_ERROR; int status; + int size; if ((phba->sli_rev < 3) || !(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) { @@ -278,7 +279,20 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable) memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8); memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8); - + size = strnlen(fc_vport->symbolic_name, LPFC_VNAME_LEN); + if (size) { + vport->vname = kzalloc(size+1, GFP_KERNEL); + if (!vport->vname) { + lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT, + "1814 Create VPORT failed. " + "vname allocation failed.\n"); + rc = VPORT_ERROR; + lpfc_free_vpi(phba, vpi); + destroy_port(vport); + goto error_out; + } + memcpy(vport->vname, fc_vport->symbolic_name, size+1); + } if (fc_vport->node_name != 0) u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn); if (fc_vport->port_name != 0) diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c index fd63b06d9ef..11aa917629a 100644 --- a/drivers/scsi/mesh.c +++ b/drivers/scsi/mesh.c @@ -1765,7 +1765,7 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg) default: return 0; } - if (mesg.event == mdev->ofdev.dev.power.power_state.event) + if (ms->phase == sleeping) return 0; scsi_block_requests(ms->host); @@ -1780,8 +1780,6 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg) disable_irq(ms->meshintr); set_mesh_power(ms, 0); - mdev->ofdev.dev.power.power_state = mesg; - return 0; } @@ -1790,7 +1788,7 @@ static int mesh_resume(struct macio_dev *mdev) struct mesh_state *ms = (struct mesh_state *)macio_get_drvdata(mdev); unsigned long flags; - if (mdev->ofdev.dev.power.power_state.event == PM_EVENT_ON) + if (ms->phase != sleeping) return 0; set_mesh_power(ms, 1); @@ -1801,8 +1799,6 @@ static int mesh_resume(struct macio_dev *mdev) enable_irq(ms->meshintr); scsi_unblock_requests(ms->host); - mdev->ofdev.dev.power.power_state.event = PM_EVENT_ON; - return 0; } diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 0c786944d2c..5822dd59582 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -113,9 +113,6 @@ static struct iscsi_transport qla4xxx_iscsi_transport = { .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | ISCSI_HOST_INITIATOR_NAME, - .sessiondata_size = sizeof(struct ddb_entry), - .host_template = &qla4xxx_driver_template, - .tgt_dscvr = qla4xxx_tgt_dscvr, .get_conn_param = qla4xxx_conn_get_param, .get_session_param = qla4xxx_sess_get_param, @@ -275,7 +272,7 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry) return err; } - ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0); + ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0); if (!ddb_entry->conn) { iscsi_remove_session(ddb_entry->sess); DEBUG2(printk(KERN_ERR "Could not add connection.\n")); @@ -292,7 +289,8 @@ struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) struct ddb_entry *ddb_entry; struct iscsi_cls_session *sess; - sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport); + sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport, + sizeof(struct ddb_entry)); if (!sess) return NULL; diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 110e776d1a0..36c92f961e1 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -855,9 +855,18 @@ void scsi_finish_command(struct scsi_cmnd *cmd) good_bytes = scsi_bufflen(cmd); if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) { + int old_good_bytes = good_bytes; drv = scsi_cmd_to_driver(cmd); if (drv->done) good_bytes = drv->done(cmd); + /* + * USB may not give sense identifying bad sector and + * simply return a residue instead, so subtract off the + * residue if drv->done() error processing indicates no + * change to the completion length. + */ + if (good_bytes == old_good_bytes) + good_bytes -= scsi_get_resid(cmd); } scsi_io_completion(cmd, good_bytes); } diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index f6600bfb5bd..01d11a01ffb 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -94,6 +94,7 @@ static const char * scsi_debug_version_date = "20070104"; #define DEF_VIRTUAL_GB 0 #define DEF_FAKE_RW 0 #define DEF_VPD_USE_HOSTNO 1 +#define DEF_SECTOR_SIZE 512 /* bit mask values for scsi_debug_opts */ #define SCSI_DEBUG_OPT_NOISE 1 @@ -142,6 +143,7 @@ static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; static int scsi_debug_fake_rw = DEF_FAKE_RW; static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; +static int scsi_debug_sector_size = DEF_SECTOR_SIZE; static int scsi_debug_cmnd_count = 0; @@ -157,11 +159,6 @@ static int sdebug_heads; /* heads per disk */ static int sdebug_cylinders_per; /* cylinders per surface */ static int sdebug_sectors_per; /* sectors per cylinder */ -/* default sector size is 512 bytes, 2**9 bytes */ -#define POW2_SECT_SIZE 9 -#define SECT_SIZE (1 << POW2_SECT_SIZE) -#define SECT_SIZE_PER(TGT) SECT_SIZE - #define SDEBUG_MAX_PARTS 4 #define SDEBUG_SENSE_LEN 32 @@ -646,6 +643,14 @@ static int inquiry_evpd_b0(unsigned char * arr) return sizeof(vpdb0_data); } +static int inquiry_evpd_b1(unsigned char *arr) +{ + memset(arr, 0, 0x3c); + arr[0] = 0; + arr[1] = 1; + + return 0x3c; +} #define SDEBUG_LONG_INQ_SZ 96 #define SDEBUG_MAX_INQ_ARR_SZ 584 @@ -701,6 +706,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, arr[n++] = 0x88; /* SCSI ports */ arr[n++] = 0x89; /* ATA information */ arr[n++] = 0xb0; /* Block limits (SBC) */ + arr[n++] = 0xb1; /* Block characteristics (SBC) */ arr[3] = n - 4; /* number of supported VPD pages */ } else if (0x80 == cmd[2]) { /* unit serial number */ arr[1] = cmd[2]; /*sanity */ @@ -740,6 +746,9 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_evpd_b0(&arr[4]); + } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ + arr[1] = cmd[2]; /*sanity */ + arr[3] = inquiry_evpd_b1(&arr[4]); } else { /* Illegal request, invalid field in cdb */ mk_sense_buffer(devip, ILLEGAL_REQUEST, @@ -878,8 +887,8 @@ static int resp_readcap(struct scsi_cmnd * scp, arr[2] = 0xff; arr[3] = 0xff; } - arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; - arr[7] = SECT_SIZE_PER(target) & 0xff; + arr[6] = (scsi_debug_sector_size >> 8) & 0xff; + arr[7] = scsi_debug_sector_size & 0xff; return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); } @@ -902,10 +911,10 @@ static int resp_readcap16(struct scsi_cmnd * scp, capac = sdebug_capacity - 1; for (k = 0; k < 8; ++k, capac >>= 8) arr[7 - k] = capac & 0xff; - arr[8] = (SECT_SIZE_PER(target) >> 24) & 0xff; - arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff; - arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff; - arr[11] = SECT_SIZE_PER(target) & 0xff; + arr[8] = (scsi_debug_sector_size >> 24) & 0xff; + arr[9] = (scsi_debug_sector_size >> 16) & 0xff; + arr[10] = (scsi_debug_sector_size >> 8) & 0xff; + arr[11] = scsi_debug_sector_size & 0xff; return fill_from_dev_buffer(scp, arr, min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); } @@ -1019,20 +1028,20 @@ static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target) static int resp_format_pg(unsigned char * p, int pcontrol, int target) { /* Format device page for mode_sense */ - unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0x40, 0, 0, 0}; - - memcpy(p, format_pg, sizeof(format_pg)); - p[10] = (sdebug_sectors_per >> 8) & 0xff; - p[11] = sdebug_sectors_per & 0xff; - p[12] = (SECT_SIZE >> 8) & 0xff; - p[13] = SECT_SIZE & 0xff; - if (DEV_REMOVEABLE(target)) - p[20] |= 0x20; /* should agree with INQUIRY */ - if (1 == pcontrol) - memset(p + 2, 0, sizeof(format_pg) - 2); - return sizeof(format_pg); + unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0x40, 0, 0, 0}; + + memcpy(p, format_pg, sizeof(format_pg)); + p[10] = (sdebug_sectors_per >> 8) & 0xff; + p[11] = sdebug_sectors_per & 0xff; + p[12] = (scsi_debug_sector_size >> 8) & 0xff; + p[13] = scsi_debug_sector_size & 0xff; + if (DEV_REMOVEABLE(target)) + p[20] |= 0x20; /* should agree with INQUIRY */ + if (1 == pcontrol) + memset(p + 2, 0, sizeof(format_pg) - 2); + return sizeof(format_pg); } static int resp_caching_pg(unsigned char * p, int pcontrol, int target) @@ -1206,8 +1215,8 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, ap[2] = (sdebug_capacity >> 8) & 0xff; ap[3] = sdebug_capacity & 0xff; } - ap[6] = (SECT_SIZE_PER(target) >> 8) & 0xff; - ap[7] = SECT_SIZE_PER(target) & 0xff; + ap[6] = (scsi_debug_sector_size >> 8) & 0xff; + ap[7] = scsi_debug_sector_size & 0xff; offset += bd_len; ap = arr + offset; } else if (16 == bd_len) { @@ -1215,10 +1224,10 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, for (k = 0; k < 8; ++k, capac >>= 8) ap[7 - k] = capac & 0xff; - ap[12] = (SECT_SIZE_PER(target) >> 24) & 0xff; - ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff; - ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff; - ap[15] = SECT_SIZE_PER(target) & 0xff; + ap[12] = (scsi_debug_sector_size >> 24) & 0xff; + ap[13] = (scsi_debug_sector_size >> 16) & 0xff; + ap[14] = (scsi_debug_sector_size >> 8) & 0xff; + ap[15] = scsi_debug_sector_size & 0xff; offset += bd_len; ap = arr + offset; } @@ -1519,10 +1528,10 @@ static int do_device_access(struct scsi_cmnd *scmd, if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; - ret = func(scmd, fake_storep + (block * SECT_SIZE), - (num - rest) * SECT_SIZE); + ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), + (num - rest) * scsi_debug_sector_size); if (!ret && rest) - ret = func(scmd, fake_storep, rest * SECT_SIZE); + ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); return ret; } @@ -1575,10 +1584,10 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, write_unlock_irqrestore(&atomic_rw, iflags); if (-1 == ret) return (DID_ERROR << 16); - else if ((ret < (num * SECT_SIZE)) && + else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " - " IO sent=%d bytes\n", num * SECT_SIZE, ret); + " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); return 0; } @@ -2085,6 +2094,7 @@ module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR); module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int, S_IRUGO | S_IWUSR); +module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); MODULE_DESCRIPTION("SCSI debug adapter driver"); @@ -2106,6 +2116,7 @@ MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); +MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)"); static char sdebug_info[256]; @@ -2158,8 +2169,9 @@ static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **sta scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, scsi_debug_cmnd_count, scsi_debug_delay, scsi_debug_max_luns, scsi_debug_scsi_level, - SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, - num_aborts, num_dev_resets, num_bus_resets, num_host_resets); + scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, + sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, + num_host_resets); if (pos < offset) { len = 0; begin = pos; @@ -2434,6 +2446,12 @@ static ssize_t sdebug_vpd_use_hostno_store(struct device_driver * ddp, DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show, sdebug_vpd_use_hostno_store); +static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf) +{ + return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); +} +DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL); + /* Note: The following function creates attribute files in the /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these files (over those found in the /sys/module/scsi_debug/parameters @@ -2459,11 +2477,13 @@ static int do_create_driverfs_files(void) ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); + ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size); return ret; } static void do_remove_driverfs_files(void) { + driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); @@ -2499,10 +2519,22 @@ static int __init scsi_debug_init(void) int k; int ret; + switch (scsi_debug_sector_size) { + case 512: + case 1024: + case 2048: + case 4096: + break; + default: + printk(KERN_ERR "scsi_debug_init: invalid sector_size %u\n", + scsi_debug_sector_size); + return -EINVAL; + } + if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; - sdebug_store_sectors = sz / SECT_SIZE; + sdebug_store_sectors = sz / scsi_debug_sector_size; sdebug_capacity = get_sdebug_capacity(); /* play around with geometry, don't waste too much on track 0 */ diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index eaf5a8add1b..006a95916f7 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -298,6 +298,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, */ static int scsi_check_sense(struct scsi_cmnd *scmd) { + struct scsi_device *sdev = scmd->device; struct scsi_sense_hdr sshdr; if (! scsi_command_normalize_sense(scmd, &sshdr)) @@ -306,6 +307,16 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) if (scsi_sense_is_deferred(&sshdr)) return NEEDS_RETRY; + if (sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh && + sdev->scsi_dh_data->scsi_dh->check_sense) { + int rc; + + rc = sdev->scsi_dh_data->scsi_dh->check_sense(sdev, &sshdr); + if (rc != SCSI_RETURN_NOT_HANDLED) + return rc; + /* handler does not care. Drop down to default handling */ + } + /* * Previous logic looked for FILEMARK, EOM or ILI which are * mainly associated with tapes and returned SUCCESS. diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index cbf55d59a54..88d1b5f44e5 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -65,7 +65,7 @@ static struct scsi_host_sg_pool scsi_sg_pools[] = { }; #undef SP -static struct kmem_cache *scsi_bidi_sdb_cache; +static struct kmem_cache *scsi_sdb_cache; static void scsi_run_queue(struct request_queue *q); @@ -784,7 +784,7 @@ void scsi_release_buffers(struct scsi_cmnd *cmd) struct scsi_data_buffer *bidi_sdb = cmd->request->next_rq->special; scsi_free_sgtable(bidi_sdb); - kmem_cache_free(scsi_bidi_sdb_cache, bidi_sdb); + kmem_cache_free(scsi_sdb_cache, bidi_sdb); cmd->request->next_rq->special = NULL; } } @@ -1059,7 +1059,7 @@ int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask) if (blk_bidi_rq(cmd->request)) { struct scsi_data_buffer *bidi_sdb = kmem_cache_zalloc( - scsi_bidi_sdb_cache, GFP_ATOMIC); + scsi_sdb_cache, GFP_ATOMIC); if (!bidi_sdb) { error = BLKPREP_DEFER; goto err_exit; @@ -1169,6 +1169,14 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) if (ret != BLKPREP_OK) return ret; + + if (unlikely(sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh + && sdev->scsi_dh_data->scsi_dh->prep_fn)) { + ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req); + if (ret != BLKPREP_OK) + return ret; + } + /* * Filesystem requests must transfer data. */ @@ -1329,7 +1337,6 @@ static inline int scsi_host_queue_ready(struct request_queue *q, printk("scsi%d unblocking host at zero depth\n", shost->host_no)); } else { - blk_plug_device(q); return 0; } } @@ -1693,11 +1700,11 @@ int __init scsi_init_queue(void) return -ENOMEM; } - scsi_bidi_sdb_cache = kmem_cache_create("scsi_bidi_sdb", - sizeof(struct scsi_data_buffer), - 0, 0, NULL); - if (!scsi_bidi_sdb_cache) { - printk(KERN_ERR "SCSI: can't init scsi bidi sdb cache\n"); + scsi_sdb_cache = kmem_cache_create("scsi_data_buffer", + sizeof(struct scsi_data_buffer), + 0, 0, NULL); + if (!scsi_sdb_cache) { + printk(KERN_ERR "SCSI: can't init scsi sdb cache\n"); goto cleanup_io_context; } @@ -1710,7 +1717,7 @@ int __init scsi_init_queue(void) if (!sgp->slab) { printk(KERN_ERR "SCSI: can't init sg slab %s\n", sgp->name); - goto cleanup_bidi_sdb; + goto cleanup_sdb; } sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE, @@ -1718,13 +1725,13 @@ int __init scsi_init_queue(void) if (!sgp->pool) { printk(KERN_ERR "SCSI: can't init sg mempool %s\n", sgp->name); - goto cleanup_bidi_sdb; + goto cleanup_sdb; } } return 0; -cleanup_bidi_sdb: +cleanup_sdb: for (i = 0; i < SG_MEMPOOL_NR; i++) { struct scsi_host_sg_pool *sgp = scsi_sg_pools + i; if (sgp->pool) @@ -1732,7 +1739,7 @@ cleanup_bidi_sdb: if (sgp->slab) kmem_cache_destroy(sgp->slab); } - kmem_cache_destroy(scsi_bidi_sdb_cache); + kmem_cache_destroy(scsi_sdb_cache); cleanup_io_context: kmem_cache_destroy(scsi_io_context_cache); @@ -1744,7 +1751,7 @@ void scsi_exit_queue(void) int i; kmem_cache_destroy(scsi_io_context_cache); - kmem_cache_destroy(scsi_bidi_sdb_cache); + kmem_cache_destroy(scsi_sdb_cache); for (i = 0; i < SG_MEMPOOL_NR; i++) { struct scsi_host_sg_pool *sgp = scsi_sg_pools + i; diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index a00eee6f7be..196fe3af0d5 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -346,7 +346,7 @@ static void scsi_target_dev_release(struct device *dev) put_device(parent); } -struct device_type scsi_target_type = { +static struct device_type scsi_target_type = { .name = "scsi_target", .release = scsi_target_dev_release, }; diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 93d2b671445..b6e56105977 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -439,6 +439,7 @@ struct bus_type scsi_bus_type = { .resume = scsi_bus_resume, .remove = scsi_bus_remove, }; +EXPORT_SYMBOL_GPL(scsi_bus_type); int scsi_sysfs_register(void) { diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 65d1737eb66..3af7cbcc5c5 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -30,10 +30,11 @@ #include <scsi/scsi_transport_iscsi.h> #include <scsi/iscsi_if.h> -#define ISCSI_SESSION_ATTRS 19 +#define ISCSI_SESSION_ATTRS 21 #define ISCSI_CONN_ATTRS 13 #define ISCSI_HOST_ATTRS 4 -#define ISCSI_TRANSPORT_VERSION "2.0-869" + +#define ISCSI_TRANSPORT_VERSION "2.0-870" struct iscsi_internal { int daemon_pid; @@ -101,16 +102,10 @@ show_transport_##name(struct device *dev, \ static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); show_transport_attr(caps, "0x%x"); -show_transport_attr(max_lun, "%d"); -show_transport_attr(max_conn, "%d"); -show_transport_attr(max_cmd_len, "%d"); static struct attribute *iscsi_transport_attrs[] = { &dev_attr_handle.attr, &dev_attr_caps.attr, - &dev_attr_max_lun.attr, - &dev_attr_max_conn.attr, - &dev_attr_max_cmd_len.attr, NULL, }; @@ -118,18 +113,139 @@ static struct attribute_group iscsi_transport_group = { .attrs = iscsi_transport_attrs, }; +/* + * iSCSI endpoint attrs + */ +#define iscsi_dev_to_endpoint(_dev) \ + container_of(_dev, struct iscsi_endpoint, dev) + +#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ +struct device_attribute dev_attr_##_prefix##_##_name = \ + __ATTR(_name,_mode,_show,_store) + +static void iscsi_endpoint_release(struct device *dev) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + kfree(ep); +} + +static struct class iscsi_endpoint_class = { + .name = "iscsi_endpoint", + .dev_release = iscsi_endpoint_release, +}; + +static ssize_t +show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + return sprintf(buf, "%u\n", ep->id); +} +static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); + +static struct attribute *iscsi_endpoint_attrs[] = { + &dev_attr_ep_handle.attr, + NULL, +}; + +static struct attribute_group iscsi_endpoint_group = { + .attrs = iscsi_endpoint_attrs, +}; +#define ISCSI_MAX_EPID -1 + +static int iscsi_match_epid(struct device *dev, void *data) +{ + struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); + unsigned int *epid = (unsigned int *) data; + + return *epid == ep->id; +} + +struct iscsi_endpoint * +iscsi_create_endpoint(int dd_size) +{ + struct device *dev; + struct iscsi_endpoint *ep; + unsigned int id; + int err; + + for (id = 1; id < ISCSI_MAX_EPID; id++) { + dev = class_find_device(&iscsi_endpoint_class, &id, + iscsi_match_epid); + if (!dev) + break; + } + if (id == ISCSI_MAX_EPID) { + printk(KERN_ERR "Too many connections. Max supported %u\n", + ISCSI_MAX_EPID - 1); + return NULL; + } + + ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); + if (!ep) + return NULL; + + ep->id = id; + ep->dev.class = &iscsi_endpoint_class; + snprintf(ep->dev.bus_id, BUS_ID_SIZE, "ep-%u", id); + err = device_register(&ep->dev); + if (err) + goto free_ep; + + err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); + if (err) + goto unregister_dev; + + if (dd_size) + ep->dd_data = &ep[1]; + return ep; + +unregister_dev: + device_unregister(&ep->dev); + return NULL; + +free_ep: + kfree(ep); + return NULL; +} +EXPORT_SYMBOL_GPL(iscsi_create_endpoint); + +void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) +{ + sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); + device_unregister(&ep->dev); +} +EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); + +struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) +{ + struct iscsi_endpoint *ep; + struct device *dev; + + dev = class_find_device(&iscsi_endpoint_class, &handle, + iscsi_match_epid); + if (!dev) + return NULL; + + ep = iscsi_dev_to_endpoint(dev); + /* + * we can drop this now because the interface will prevent + * removals and lookups from racing. + */ + put_device(dev); + return ep; +} +EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); static int iscsi_setup_host(struct transport_container *tc, struct device *dev, struct device *cdev) { struct Scsi_Host *shost = dev_to_shost(dev); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; memset(ihost, 0, sizeof(*ihost)); - INIT_LIST_HEAD(&ihost->sessions); - mutex_init(&ihost->mutex); atomic_set(&ihost->nr_scans, 0); + mutex_init(&ihost->mutex); snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d", shost->host_no); @@ -144,7 +260,7 @@ static int iscsi_remove_host(struct transport_container *tc, struct device *dev, struct device *cdev) { struct Scsi_Host *shost = dev_to_shost(dev); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; destroy_workqueue(ihost->scan_workq); return 0; @@ -287,6 +403,24 @@ static int iscsi_is_session_dev(const struct device *dev) return dev->release == iscsi_session_release; } +static int iscsi_iter_session_fn(struct device *dev, void *data) +{ + void (* fn) (struct iscsi_cls_session *) = data; + + if (!iscsi_is_session_dev(dev)) + return 0; + fn(iscsi_dev_to_session(dev)); + return 0; +} + +void iscsi_host_for_each_session(struct Scsi_Host *shost, + void (*fn)(struct iscsi_cls_session *)) +{ + device_for_each_child(&shost->shost_gendev, fn, + iscsi_iter_session_fn); +} +EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); + /** * iscsi_scan_finished - helper to report when running scans are done * @shost: scsi host @@ -297,7 +431,7 @@ static int iscsi_is_session_dev(const struct device *dev) */ int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) { - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; /* * qla4xxx will have kicked off some session unblocks before calling * scsi_scan_host, so just wait for them to complete. @@ -306,42 +440,76 @@ int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) } EXPORT_SYMBOL_GPL(iscsi_scan_finished); -static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, - uint id, uint lun) +struct iscsi_scan_data { + unsigned int channel; + unsigned int id; + unsigned int lun; +}; + +static int iscsi_user_scan_session(struct device *dev, void *data) { - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_scan_data *scan_data = data; struct iscsi_cls_session *session; + struct Scsi_Host *shost; + struct iscsi_cls_host *ihost; + unsigned long flags; + unsigned int id; + + if (!iscsi_is_session_dev(dev)) + return 0; + + session = iscsi_dev_to_session(dev); + shost = iscsi_session_to_shost(session); + ihost = shost->shost_data; mutex_lock(&ihost->mutex); - list_for_each_entry(session, &ihost->sessions, host_list) { - if ((channel == SCAN_WILD_CARD || channel == 0) && - (id == SCAN_WILD_CARD || id == session->target_id)) - scsi_scan_target(&session->dev, 0, - session->target_id, lun, 1); + spin_lock_irqsave(&session->lock, flags); + if (session->state != ISCSI_SESSION_LOGGED_IN) { + spin_unlock_irqrestore(&session->lock, flags); + mutex_unlock(&ihost->mutex); + return 0; } - mutex_unlock(&ihost->mutex); + id = session->target_id; + spin_unlock_irqrestore(&session->lock, flags); + if (id != ISCSI_MAX_TARGET) { + if ((scan_data->channel == SCAN_WILD_CARD || + scan_data->channel == 0) && + (scan_data->id == SCAN_WILD_CARD || + scan_data->id == id)) + scsi_scan_target(&session->dev, 0, id, + scan_data->lun, 1); + } + mutex_unlock(&ihost->mutex); return 0; } +static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, + uint id, uint lun) +{ + struct iscsi_scan_data scan_data; + + scan_data.channel = channel; + scan_data.id = id; + scan_data.lun = lun; + + return device_for_each_child(&shost->shost_gendev, &scan_data, + iscsi_user_scan_session); +} + static void iscsi_scan_session(struct work_struct *work) { struct iscsi_cls_session *session = container_of(work, struct iscsi_cls_session, scan_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; - unsigned long flags; + struct iscsi_cls_host *ihost = shost->shost_data; + struct iscsi_scan_data scan_data; - spin_lock_irqsave(&session->lock, flags); - if (session->state != ISCSI_SESSION_LOGGED_IN) { - spin_unlock_irqrestore(&session->lock, flags); - goto done; - } - spin_unlock_irqrestore(&session->lock, flags); + scan_data.channel = 0; + scan_data.id = SCAN_WILD_CARD; + scan_data.lun = SCAN_WILD_CARD; - scsi_scan_target(&session->dev, 0, session->target_id, - SCAN_WILD_CARD, 1); -done: + iscsi_user_scan_session(&session->dev, &scan_data); atomic_dec(&ihost->nr_scans); } @@ -381,7 +549,7 @@ static void __iscsi_unblock_session(struct work_struct *work) container_of(work, struct iscsi_cls_session, unblock_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; unsigned long flags; /* @@ -449,15 +617,19 @@ static void __iscsi_unbind_session(struct work_struct *work) container_of(work, struct iscsi_cls_session, unbind_work); struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; + unsigned long flags; /* Prevent new scans and make sure scanning is not in progress */ mutex_lock(&ihost->mutex); - if (list_empty(&session->host_list)) { + spin_lock_irqsave(&session->lock, flags); + if (session->target_id == ISCSI_MAX_TARGET) { + spin_unlock_irqrestore(&session->lock, flags); mutex_unlock(&ihost->mutex); return; } - list_del_init(&session->host_list); + session->target_id = ISCSI_MAX_TARGET; + spin_unlock_irqrestore(&session->lock, flags); mutex_unlock(&ihost->mutex); scsi_remove_target(&session->dev); @@ -467,18 +639,18 @@ static void __iscsi_unbind_session(struct work_struct *work) static int iscsi_unbind_session(struct iscsi_cls_session *session) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; return queue_work(ihost->scan_workq, &session->unbind_work); } struct iscsi_cls_session * -iscsi_alloc_session(struct Scsi_Host *shost, - struct iscsi_transport *transport) +iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, + int dd_size) { struct iscsi_cls_session *session; - session = kzalloc(sizeof(*session) + transport->sessiondata_size, + session = kzalloc(sizeof(*session) + dd_size, GFP_KERNEL); if (!session) return NULL; @@ -487,7 +659,6 @@ iscsi_alloc_session(struct Scsi_Host *shost, session->recovery_tmo = 120; session->state = ISCSI_SESSION_FREE; INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); - INIT_LIST_HEAD(&session->host_list); INIT_LIST_HEAD(&session->sess_list); INIT_WORK(&session->unblock_work, __iscsi_unblock_session); INIT_WORK(&session->block_work, __iscsi_block_session); @@ -500,22 +671,57 @@ iscsi_alloc_session(struct Scsi_Host *shost, session->dev.parent = &shost->shost_gendev; session->dev.release = iscsi_session_release; device_initialize(&session->dev); - if (transport->sessiondata_size) + if (dd_size) session->dd_data = &session[1]; return session; } EXPORT_SYMBOL_GPL(iscsi_alloc_session); +static int iscsi_get_next_target_id(struct device *dev, void *data) +{ + struct iscsi_cls_session *session; + unsigned long flags; + int err = 0; + + if (!iscsi_is_session_dev(dev)) + return 0; + + session = iscsi_dev_to_session(dev); + spin_lock_irqsave(&session->lock, flags); + if (*((unsigned int *) data) == session->target_id) + err = -EEXIST; + spin_unlock_irqrestore(&session->lock, flags); + return err; +} + int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost; + struct iscsi_cls_host *ihost; unsigned long flags; + unsigned int id = target_id; int err; ihost = shost->shost_data; session->sid = atomic_add_return(1, &iscsi_session_nr); - session->target_id = target_id; + + if (id == ISCSI_MAX_TARGET) { + for (id = 0; id < ISCSI_MAX_TARGET; id++) { + err = device_for_each_child(&shost->shost_gendev, &id, + iscsi_get_next_target_id); + if (!err) + break; + } + + if (id == ISCSI_MAX_TARGET) { + iscsi_cls_session_printk(KERN_ERR, session, + "Too many iscsi targets. Max " + "number of targets is %d.\n", + ISCSI_MAX_TARGET - 1); + goto release_host; + } + } + session->target_id = id; snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", session->sid); @@ -531,10 +737,6 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) list_add(&session->sess_list, &sesslist); spin_unlock_irqrestore(&sesslock, flags); - mutex_lock(&ihost->mutex); - list_add(&session->host_list, &ihost->sessions); - mutex_unlock(&ihost->mutex); - iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); return 0; @@ -548,18 +750,18 @@ EXPORT_SYMBOL_GPL(iscsi_add_session); * iscsi_create_session - create iscsi class session * @shost: scsi host * @transport: iscsi transport + * @dd_size: private driver data size * @target_id: which target * * This can be called from a LLD or iscsi_transport. */ struct iscsi_cls_session * -iscsi_create_session(struct Scsi_Host *shost, - struct iscsi_transport *transport, - unsigned int target_id) +iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, + int dd_size, unsigned int target_id) { struct iscsi_cls_session *session; - session = iscsi_alloc_session(shost, transport); + session = iscsi_alloc_session(shost, transport, dd_size); if (!session) return NULL; @@ -595,7 +797,7 @@ static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) void iscsi_remove_session(struct iscsi_cls_session *session) { struct Scsi_Host *shost = iscsi_session_to_shost(session); - struct iscsi_host *ihost = shost->shost_data; + struct iscsi_cls_host *ihost = shost->shost_data; unsigned long flags; int err; @@ -661,6 +863,7 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session); /** * iscsi_create_conn - create iscsi class connection * @session: iscsi cls session + * @dd_size: private driver data size * @cid: connection id * * This can be called from a LLD or iscsi_transport. The connection @@ -673,18 +876,17 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session); * non-zero. */ struct iscsi_cls_conn * -iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) +iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) { struct iscsi_transport *transport = session->transport; struct iscsi_cls_conn *conn; unsigned long flags; int err; - conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); + conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); if (!conn) return NULL; - - if (transport->conndata_size) + if (dd_size) conn->dd_data = &conn[1]; INIT_LIST_HEAD(&conn->conn_list); @@ -1017,21 +1219,20 @@ int iscsi_session_event(struct iscsi_cls_session *session, EXPORT_SYMBOL_GPL(iscsi_session_event); static int -iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) +iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, + struct iscsi_uevent *ev, uint32_t initial_cmdsn, + uint16_t cmds_max, uint16_t queue_depth) { struct iscsi_transport *transport = priv->iscsi_transport; struct iscsi_cls_session *session; - uint32_t hostno; + uint32_t host_no; - session = transport->create_session(transport, &priv->t, - ev->u.c_session.cmds_max, - ev->u.c_session.queue_depth, - ev->u.c_session.initial_cmdsn, - &hostno); + session = transport->create_session(ep, cmds_max, queue_depth, + initial_cmdsn, &host_no); if (!session) return -ENOMEM; - ev->r.c_session_ret.host_no = hostno; + ev->r.c_session_ret.host_no = host_no; ev->r.c_session_ret.sid = session->sid; return 0; } @@ -1106,6 +1307,7 @@ static int iscsi_if_transport_ep(struct iscsi_transport *transport, struct iscsi_uevent *ev, int msg_type) { + struct iscsi_endpoint *ep; struct sockaddr *dst_addr; int rc = 0; @@ -1115,22 +1317,33 @@ iscsi_if_transport_ep(struct iscsi_transport *transport, return -EINVAL; dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); - rc = transport->ep_connect(dst_addr, - ev->u.ep_connect.non_blocking, - &ev->r.ep_connect_ret.handle); + ep = transport->ep_connect(dst_addr, + ev->u.ep_connect.non_blocking); + if (IS_ERR(ep)) + return PTR_ERR(ep); + + ev->r.ep_connect_ret.handle = ep->id; break; case ISCSI_UEVENT_TRANSPORT_EP_POLL: if (!transport->ep_poll) return -EINVAL; - ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, + ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); + if (!ep) + return -EINVAL; + + ev->r.retcode = transport->ep_poll(ep, ev->u.ep_poll.timeout_ms); break; case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: if (!transport->ep_disconnect) return -EINVAL; - transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); + ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); + if (!ep) + return -EINVAL; + + transport->ep_disconnect(ep); break; } return rc; @@ -1195,6 +1408,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) struct iscsi_internal *priv; struct iscsi_cls_session *session; struct iscsi_cls_conn *conn; + struct iscsi_endpoint *ep = NULL; priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); if (!priv) @@ -1208,7 +1422,22 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) switch (nlh->nlmsg_type) { case ISCSI_UEVENT_CREATE_SESSION: - err = iscsi_if_create_session(priv, ev); + err = iscsi_if_create_session(priv, ep, ev, + ev->u.c_session.initial_cmdsn, + ev->u.c_session.cmds_max, + ev->u.c_session.queue_depth); + break; + case ISCSI_UEVENT_CREATE_BOUND_SESSION: + ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); + if (!ep) { + err = -EINVAL; + break; + } + + err = iscsi_if_create_session(priv, ep, ev, + ev->u.c_bound_session.initial_cmdsn, + ev->u.c_bound_session.cmds_max, + ev->u.c_bound_session.queue_depth); break; case ISCSI_UEVENT_DESTROY_SESSION: session = iscsi_session_lookup(ev->u.d_session.sid); @@ -1414,6 +1643,8 @@ iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); +iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); +iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0) static ssize_t show_priv_session_state(struct device *dev, struct device_attribute *attr, @@ -1580,6 +1811,8 @@ iscsi_register_transport(struct iscsi_transport *tt) priv->daemon_pid = -1; priv->iscsi_transport = tt; priv->t.user_scan = iscsi_user_scan; + if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) + priv->t.create_work_queue = 1; priv->dev.class = &iscsi_transport_class; snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); @@ -1595,7 +1828,7 @@ iscsi_register_transport(struct iscsi_transport *tt) priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; priv->t.host_attrs.ac.class = &iscsi_host_class.class; priv->t.host_attrs.ac.match = iscsi_host_match; - priv->t.host_size = sizeof(struct iscsi_host); + priv->t.host_size = sizeof(struct iscsi_cls_host); transport_container_register(&priv->t.host_attrs); SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); @@ -1653,6 +1886,8 @@ iscsi_register_transport(struct iscsi_transport *tt) SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); + SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME); + SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME); SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); SETUP_PRIV_SESSION_RD_ATTR(state); @@ -1668,6 +1903,7 @@ iscsi_register_transport(struct iscsi_transport *tt) unregister_dev: device_unregister(&priv->dev); + return NULL; free_priv: kfree(priv); return NULL; @@ -1715,10 +1951,14 @@ static __init int iscsi_transport_init(void) if (err) return err; - err = transport_class_register(&iscsi_host_class); + err = class_register(&iscsi_endpoint_class); if (err) goto unregister_transport_class; + err = transport_class_register(&iscsi_host_class); + if (err) + goto unregister_endpoint_class; + err = transport_class_register(&iscsi_connection_class); if (err) goto unregister_host_class; @@ -1727,8 +1967,8 @@ static __init int iscsi_transport_init(void) if (err) goto unregister_conn_class; - nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, - THIS_MODULE); + nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, + NULL, THIS_MODULE); if (!nls) { err = -ENOBUFS; goto unregister_session_class; @@ -1748,6 +1988,8 @@ unregister_conn_class: transport_class_unregister(&iscsi_connection_class); unregister_host_class: transport_class_unregister(&iscsi_host_class); +unregister_endpoint_class: + class_unregister(&iscsi_endpoint_class); unregister_transport_class: class_unregister(&iscsi_transport_class); return err; @@ -1760,6 +2002,7 @@ static void __exit iscsi_transport_exit(void) transport_class_unregister(&iscsi_connection_class); transport_class_unregister(&iscsi_session_class); transport_class_unregister(&iscsi_host_class); + class_unregister(&iscsi_endpoint_class); class_unregister(&iscsi_transport_class); } diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index d53312c4254..0c63947d8a9 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -58,8 +58,8 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_ioctl.h> #include <scsi/scsicam.h> -#include <scsi/sd.h> +#include "sd.h" #include "scsi_logging.h" MODULE_AUTHOR("Eric Youngdale"); @@ -295,11 +295,6 @@ static int sd_major(int major_idx) } } -static inline struct scsi_disk *scsi_disk(struct gendisk *disk) -{ - return container_of(disk->private_data, struct scsi_disk, driver); -} - static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) { struct scsi_disk *sdkp = NULL; diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h new file mode 100644 index 00000000000..03a3d45cfa4 --- /dev/null +++ b/drivers/scsi/sd.h @@ -0,0 +1,62 @@ +#ifndef _SCSI_DISK_H +#define _SCSI_DISK_H + +/* + * More than enough for everybody ;) The huge number of majors + * is a leftover from 16bit dev_t days, we don't really need that + * much numberspace. + */ +#define SD_MAJORS 16 + +/* + * This is limited by the naming scheme enforced in sd_probe, + * add another character to it if you really need more disks. + */ +#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26) + +/* + * Time out in seconds for disks and Magneto-opticals (which are slower). + */ +#define SD_TIMEOUT (30 * HZ) +#define SD_MOD_TIMEOUT (75 * HZ) + +/* + * Number of allowed retries + */ +#define SD_MAX_RETRIES 5 +#define SD_PASSTHROUGH_RETRIES 1 + +/* + * Size of the initial data buffer for mode and read capacity data + */ +#define SD_BUF_SIZE 512 + +struct scsi_disk { + struct scsi_driver *driver; /* always &sd_template */ + struct scsi_device *device; + struct device dev; + struct gendisk *disk; + unsigned int openers; /* protected by BKL for now, yuck */ + sector_t capacity; /* size in 512-byte sectors */ + u32 index; + u8 media_present; + u8 write_prot; + unsigned previous_state : 1; + unsigned WCE : 1; /* state of disk WCE bit */ + unsigned RCD : 1; /* state of disk RCD bit, unused */ + unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ +}; +#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev) + +static inline struct scsi_disk *scsi_disk(struct gendisk *disk) +{ + return container_of(disk->private_data, struct scsi_disk, driver); +} + +#define sd_printk(prefix, sdsk, fmt, a...) \ + (sdsk)->disk ? \ + sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ + (sdsk)->disk->disk_name, ##a) : \ + sdev_printk(prefix, (sdsk)->device, fmt, ##a) + +#endif /* _SCSI_DISK_H */ diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index fccd2e88d60..d3b8ebb8377 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1036,6 +1036,9 @@ sg_ioctl(struct inode *inode, struct file *filp, case SG_SCSI_RESET_DEVICE: val = SCSI_TRY_RESET_DEVICE; break; + case SG_SCSI_RESET_TARGET: + val = SCSI_TRY_RESET_TARGET; + break; case SG_SCSI_RESET_BUS: val = SCSI_TRY_RESET_BUS; break; diff --git a/drivers/scsi/sym53c8xx_2/sym_misc.h b/drivers/scsi/sym53c8xx_2/sym_misc.h index 0433d5d0caf..430537183c1 100644 --- a/drivers/scsi/sym53c8xx_2/sym_misc.h +++ b/drivers/scsi/sym53c8xx_2/sym_misc.h @@ -121,9 +121,7 @@ static __inline void sym_que_move(struct sym_quehead *orig, } } -#define sym_que_entry(ptr, type, member) \ - ((type *)((char *)(ptr)-(unsigned int)(&((type *)0)->member))) - +#define sym_que_entry(ptr, type, member) container_of(ptr, type, member) #define sym_insque(new, pos) __sym_que_add(new, pos, (pos)->flink) |