diff options
Diffstat (limited to 'drivers/ieee1394/sbp2.c')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 2864 |
1 files changed, 2864 insertions, 0 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c new file mode 100644 index 00000000000..00c7b958361 --- /dev/null +++ b/drivers/ieee1394/sbp2.c @@ -0,0 +1,2864 @@ +/* + * sbp2.c - SBP-2 protocol driver for IEEE-1394 + * + * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) + * jamesg@filanet.com (JSG) + * + * Copyright (C) 2003 Ben Collins <bcollins@debian.org> + * + * 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. + */ + +/* + * Brief Description: + * + * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 + * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level + * driver. It also registers as a SCSI lower-level driver in order to accept + * SCSI commands for transport using SBP-2. + * + * You may access any attached SBP-2 storage devices as if they were SCSI + * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). + * + * Current Issues: + * + * - Error Handling: SCSI aborts and bus reset requests are handled somewhat + * but the code needs additional debugging. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/fs.h> +#include <linux/poll.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/blkdev.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/pci.h> + +#include <asm/current.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/byteorder.h> +#include <asm/atomic.h> +#include <asm/system.h> +#include <asm/scatterlist.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> + +#include "csr1212.h" +#include "ieee1394.h" +#include "ieee1394_types.h" +#include "ieee1394_core.h" +#include "nodemgr.h" +#include "hosts.h" +#include "highlevel.h" +#include "ieee1394_transactions.h" +#include "sbp2.h" + +static char version[] __devinitdata = + "$Rev: 1219 $ Ben Collins <bcollins@debian.org>"; + +/* + * Module load parameter definitions + */ + +/* + * Change max_speed on module load if you have a bad IEEE-1394 + * controller that has trouble running 2KB packets at 400mb. + * + * NOTE: On certain OHCI parts I have seen short packets on async transmit + * (probably due to PCI latency/throughput issues with the part). You can + * bump down the speed if you are running into problems. + */ +static int max_speed = IEEE1394_SPEED_MAX; +module_param(max_speed, int, 0644); +MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)"); + +/* + * Set serialize_io to 1 if you'd like only one scsi command sent + * down to us at a time (debugging). This might be necessary for very + * badly behaved sbp2 devices. + */ +static int serialize_io = 0; +module_param(serialize_io, int, 0444); +MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)"); + +/* + * Bump up max_sectors if you'd like to support very large sized + * transfers. Please note that some older sbp2 bridge chips are broken for + * transfers greater or equal to 128KB. Default is a value of 255 + * sectors, or just under 128KB (at 512 byte sector size). I can note that + * the Oxsemi sbp2 chipsets have no problems supporting very large + * transfer sizes. + */ +static int max_sectors = SBP2_MAX_SECTORS; +module_param(max_sectors, int, 0444); +MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); + +/* + * Exclusive login to sbp2 device? In most cases, the sbp2 driver should + * do an exclusive login, as it's generally unsafe to have two hosts + * talking to a single sbp2 device at the same time (filesystem coherency, + * etc.). If you're running an sbp2 device that supports multiple logins, + * and you're either running read-only filesystems or some sort of special + * filesystem supporting multiple hosts (one such filesystem is OpenGFS, + * see opengfs.sourceforge.net for more info), then set exclusive_login + * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four + * concurrent logins. + */ +static int exclusive_login = 1; +module_param(exclusive_login, int, 0644); +MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); + +/* + * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on + * if your sbp2 device is not properly handling the SCSI inquiry command. + * This hack makes the inquiry look more like a typical MS Windows + * inquiry. + * + * If force_inquiry_hack=1 is required for your device to work, + * please submit the logged sbp2_firmware_revision value of this device to + * the linux1394-devel mailing list. + */ +static int force_inquiry_hack = 0; +module_param(force_inquiry_hack, int, 0444); +MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); + + +/* + * Export information about protocols/devices supported by this driver. + */ +static struct ieee1394_device_id sbp2_id_table[] = { + { + .match_flags =IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION, + .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, + .version = SBP2_SW_VERSION_ENTRY & 0xffffff + }, + { } +}; + +MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); + +/* + * Debug levels, configured via kernel config, or enable here. + */ + +/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ +/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ +/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ +/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ +/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ + +#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS +#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) +static u32 global_outstanding_command_orbs = 0; +#define outstanding_orb_incr global_outstanding_command_orbs++ +#define outstanding_orb_decr global_outstanding_command_orbs-- +#else +#define SBP2_ORB_DEBUG(fmt, args...) +#define outstanding_orb_incr +#define outstanding_orb_decr +#endif + +#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA +#define SBP2_DMA_ALLOC(fmt, args...) \ + HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ + ++global_outstanding_dmas, ## args) +#define SBP2_DMA_FREE(fmt, args...) \ + HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ + --global_outstanding_dmas, ## args) +static u32 global_outstanding_dmas = 0; +#else +#define SBP2_DMA_ALLOC(fmt, args...) +#define SBP2_DMA_FREE(fmt, args...) +#endif + +#if CONFIG_IEEE1394_SBP2_DEBUG >= 2 +#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) +#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) +#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) +#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) +#elif CONFIG_IEEE1394_SBP2_DEBUG == 1 +#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) +#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) +#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) +#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) +#else +#define SBP2_DEBUG(fmt, args...) +#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) +#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) +#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) +#endif + +#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) + + +/* + * Globals + */ + +static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, + u32 status); + +static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, + u32 scsi_status, struct scsi_cmnd *SCpnt, + void (*done)(struct scsi_cmnd *)); + +static struct scsi_host_template scsi_driver_template; + +static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; + +static void sbp2_host_reset(struct hpsb_host *host); + +static int sbp2_probe(struct device *dev); +static int sbp2_remove(struct device *dev); +static int sbp2_update(struct unit_directory *ud); + +static struct hpsb_highlevel sbp2_highlevel = { + .name = SBP2_DEVICE_NAME, + .host_reset = sbp2_host_reset, +}; + +static struct hpsb_address_ops sbp2_ops = { + .write = sbp2_handle_status_write +}; + +#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA +static struct hpsb_address_ops sbp2_physdma_ops = { + .read = sbp2_handle_physdma_read, + .write = sbp2_handle_physdma_write, +}; +#endif + +static struct hpsb_protocol_driver sbp2_driver = { + .name = "SBP2 Driver", + .id_table = sbp2_id_table, + .update = sbp2_update, + .driver = { + .name = SBP2_DEVICE_NAME, + .bus = &ieee1394_bus_type, + .probe = sbp2_probe, + .remove = sbp2_remove, + }, +}; + + +/* List of device firmware's that require a forced 36 byte inquiry. */ +static u32 sbp2_broken_inquiry_list[] = { + 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ + /* DViCO Momobay CX-1 */ + 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ + /* QPS Fire DVDBurner */ +}; + +#define NUM_BROKEN_INQUIRY_DEVS \ + (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) + +/************************************** + * General utility functions + **************************************/ + + +#ifndef __BIG_ENDIAN +/* + * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. + */ +static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) +{ + u32 *temp = buffer; + + for (length = (length >> 2); length--; ) + temp[length] = be32_to_cpu(temp[length]); + + return; +} + +/* + * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. + */ +static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) +{ + u32 *temp = buffer; + + for (length = (length >> 2); length--; ) + temp[length] = cpu_to_be32(temp[length]); + + return; +} +#else /* BIG_ENDIAN */ +/* Why waste the cpu cycles? */ +#define sbp2util_be32_to_cpu_buffer(x,y) +#define sbp2util_cpu_to_be32_buffer(x,y) +#endif + +#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP +/* + * Debug packet dump routine. Length is in bytes. + */ +static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr) +{ + int i; + unsigned char *dump = buffer; + + if (!dump || !length || !dump_name) + return; + + if (dump_phys_addr) + printk("[%s, 0x%x]", dump_name, dump_phys_addr); + else + printk("[%s]", dump_name); + for (i = 0; i < length; i++) { + if (i > 0x3f) { + printk("\n ..."); + break; + } + if ((i & 0x3) == 0) + printk(" "); + if ((i & 0xf) == 0) + printk("\n "); + printk("%02x ", (int) dump[i]); + } + printk("\n"); + + return; +} +#else +#define sbp2util_packet_dump(w,x,y,z) +#endif + +/* + * Goofy routine that basically does a down_timeout function. + */ +static int sbp2util_down_timeout(atomic_t *done, int timeout) +{ + int i; + + for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { + if (msleep_interruptible(100)) /* 100ms */ + return(1); + } + return ((i > 0) ? 0:1); +} + +/* Free's an allocated packet */ +static void sbp2_free_packet(struct hpsb_packet *packet) +{ + hpsb_free_tlabel(packet); + hpsb_free_packet(packet); +} + +/* This is much like hpsb_node_write(), except it ignores the response + * subaction and returns immediately. Can be used from interrupts. + */ +static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, + quadlet_t *buffer, size_t length) +{ + struct hpsb_packet *packet; + + packet = hpsb_make_writepacket(ne->host, ne->nodeid, + addr, buffer, length); + if (!packet) + return -ENOMEM; + + hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet, + packet); + + hpsb_node_fill_packet(ne, packet); + + if (hpsb_send_packet(packet) < 0) { + sbp2_free_packet(packet); + return -EIO; + } + + return 0; +} + +/* + * This function is called to create a pool of command orbs used for + * command processing. It is called when a new sbp2 device is detected. + */ +static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + int i; + unsigned long flags, orbs; + struct sbp2_command_info *command; + + orbs = serialize_io ? 2 : SBP2_MAX_CMDS; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + for (i = 0; i < orbs; i++) { + command = (struct sbp2_command_info *) + kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC); + if (!command) { + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return(-ENOMEM); + } + memset(command, '\0', sizeof(struct sbp2_command_info)); + command->command_orb_dma = + pci_map_single (hi->host->pdev, &command->command_orb, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + SBP2_DMA_ALLOC("single command orb DMA"); + command->sge_dma = + pci_map_single (hi->host->pdev, &command->scatter_gather_element, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + SBP2_DMA_ALLOC("scatter_gather_element"); + INIT_LIST_HEAD(&command->list); + list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); + } + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return 0; +} + +/* + * This function is called to delete a pool of command orbs. + */ +static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) +{ + struct hpsb_host *host = scsi_id->hi->host; + struct list_head *lh, *next; + struct sbp2_command_info *command; + unsigned long flags; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { + list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { + command = list_entry(lh, struct sbp2_command_info, list); + + /* Release our generic DMA's */ + pci_unmap_single(host->pdev, command->command_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + SBP2_DMA_FREE("single command orb DMA"); + pci_unmap_single(host->pdev, command->sge_dma, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + SBP2_DMA_FREE("scatter_gather_element"); + + kfree(command); + } + } + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return; +} + +/* + * This function finds the sbp2_command for a given outstanding command + * orb.Only looks at the inuse list. + */ +static struct sbp2_command_info *sbp2util_find_command_for_orb( + struct scsi_id_instance_data *scsi_id, dma_addr_t orb) +{ + struct sbp2_command_info *command; + unsigned long flags; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { + list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { + if (command->command_orb_dma == orb) { + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return (command); + } + } + } + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + + SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); + + return(NULL); +} + +/* + * This function finds the sbp2_command for a given outstanding SCpnt. + * Only looks at the inuse list. + */ +static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) +{ + struct sbp2_command_info *command; + unsigned long flags; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { + list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { + if (command->Current_SCpnt == SCpnt) { + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return (command); + } + } + } + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return(NULL); +} + +/* + * This function allocates a command orb used to send a scsi command. + */ +static struct sbp2_command_info *sbp2util_allocate_command_orb( + struct scsi_id_instance_data *scsi_id, + struct scsi_cmnd *Current_SCpnt, + void (*Current_done)(struct scsi_cmnd *)) +{ + struct list_head *lh; + struct sbp2_command_info *command = NULL; + unsigned long flags; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { + lh = scsi_id->sbp2_command_orb_completed.next; + list_del(lh); + command = list_entry(lh, struct sbp2_command_info, list); + command->Current_done = Current_done; + command->Current_SCpnt = Current_SCpnt; + list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); + } else { + SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); + } + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); + return (command); +} + +/* Free our DMA's */ +static void sbp2util_free_command_dma(struct sbp2_command_info *command) +{ + struct scsi_id_instance_data *scsi_id = + (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; + struct hpsb_host *host; + + if (!scsi_id) { + printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); + return; + } + + host = scsi_id->ud->ne->host; + + if (command->cmd_dma) { + if (command->dma_type == CMD_DMA_SINGLE) { + pci_unmap_single(host->pdev, command->cmd_dma, + command->dma_size, command->dma_dir); + SBP2_DMA_FREE("single bulk"); + } else if (command->dma_type == CMD_DMA_PAGE) { + pci_unmap_page(host->pdev, command->cmd_dma, + command->dma_size, command->dma_dir); + SBP2_DMA_FREE("single page"); + } /* XXX: Check for CMD_DMA_NONE bug */ + command->dma_type = CMD_DMA_NONE; + command->cmd_dma = 0; + } + + if (command->sge_buffer) { + pci_unmap_sg(host->pdev, command->sge_buffer, + command->dma_size, command->dma_dir); + SBP2_DMA_FREE("scatter list"); + command->sge_buffer = NULL; + } +} + +/* + * This function moves a command to the completed orb list. + */ +static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command) +{ + unsigned long flags; + + spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); + list_del(&command->list); + sbp2util_free_command_dma(command); + list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); + spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); +} + + + +/********************************************* + * IEEE-1394 core driver stack related section + *********************************************/ +static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); + +static int sbp2_probe(struct device *dev) +{ + struct unit_directory *ud; + struct scsi_id_instance_data *scsi_id; + + SBP2_DEBUG("sbp2_probe"); + + ud = container_of(dev, struct unit_directory, device); + + /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) + * instead. */ + if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) + return -ENODEV; + + scsi_id = sbp2_alloc_device(ud); + + if (!scsi_id) + return -ENOMEM; + + sbp2_parse_unit_directory(scsi_id, ud); + + return sbp2_start_device(scsi_id); +} + +static int sbp2_remove(struct device *dev) +{ + struct unit_directory *ud; + struct scsi_id_instance_data *scsi_id; + + SBP2_DEBUG("sbp2_remove"); + + ud = container_of(dev, struct unit_directory, device); + scsi_id = ud->device.driver_data; + + sbp2_logout_device(scsi_id); + sbp2_remove_device(scsi_id); + + return 0; +} + +static int sbp2_update(struct unit_directory *ud) +{ + struct scsi_id_instance_data *scsi_id = ud->device.driver_data; + + SBP2_DEBUG("sbp2_update"); + + if (sbp2_reconnect_device(scsi_id)) { + + /* + * Ok, reconnect has failed. Perhaps we didn't + * reconnect fast enough. Try doing a regular login, but + * first do a logout just in case of any weirdness. + */ + sbp2_logout_device(scsi_id); + + if (sbp2_login_device(scsi_id)) { + /* Login failed too, just fail, and the backend + * will call our sbp2_remove for us */ + SBP2_ERR("Failed to reconnect to sbp2 device!"); + return -EBUSY; + } + } + + /* Set max retries to something large on the device. */ + sbp2_set_busy_timeout(scsi_id); + + /* Do a SBP-2 fetch agent reset. */ + sbp2_agent_reset(scsi_id, 1); + + /* Get the max speed and packet size that we can use. */ + sbp2_max_speed_and_size(scsi_id); + + /* Complete any pending commands with busy (so they get + * retried) and remove them from our queue + */ + sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); + + /* Make sure we unblock requests (since this is likely after a bus + * reset). */ + scsi_unblock_requests(scsi_id->scsi_host); + + return 0; +} + +/* This functions is called by the sbp2_probe, for each new device. We now + * allocate one scsi host for each scsi_id (unit directory). */ +static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) +{ + struct sbp2scsi_host_info *hi; + struct Scsi_Host *scsi_host = NULL; + struct scsi_id_instance_data *scsi_id = NULL; + + SBP2_DEBUG("sbp2_alloc_device"); + + scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL); + if (!scsi_id) { + SBP2_ERR("failed to create scsi_id"); + goto failed_alloc; + } + memset(scsi_id, 0, sizeof(*scsi_id)); + + scsi_id->ne = ud->ne; + scsi_id->ud = ud; + scsi_id->speed_code = IEEE1394_SPEED_100; + scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; + atomic_set(&scsi_id->sbp2_login_complete, 0); + INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); + INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); + INIT_LIST_HEAD(&scsi_id->scsi_list); + spin_lock_init(&scsi_id->sbp2_command_orb_lock); + scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED; + + ud->device.driver_data = scsi_id; + + hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); + if (!hi) { + hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); + if (!hi) { + SBP2_ERR("failed to allocate hostinfo"); + goto failed_alloc; + } + SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); + hi->host = ud->ne->host; + INIT_LIST_HEAD(&hi->scsi_ids); + + /* Register our sbp2 status address space... */ + hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, + SBP2_STATUS_FIFO_ADDRESS, + SBP2_STATUS_FIFO_ADDRESS + + SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); +#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA + /* Handle data movement if physical dma is not + * enabled/supportedon host controller */ + hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, + 0x0ULL, 0xfffffffcULL); +#endif + } + + scsi_id->hi = hi; + + list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); + + /* Register our host with the SCSI stack. */ + scsi_host = scsi_host_alloc(&scsi_driver_template, 0); + if (!scsi_host) { + SBP2_ERR("failed to register scsi host"); + goto failed_alloc; + } + + scsi_host->hostdata[0] = (unsigned long)scsi_id; + + if (!scsi_add_host(scsi_host, &ud->device)) { + scsi_id->scsi_host = scsi_host; + return scsi_id; + } + + SBP2_ERR("failed to add scsi host"); + scsi_host_put(scsi_host); + +failed_alloc: + sbp2_remove_device(scsi_id); + return NULL; +} + + +static void sbp2_host_reset(struct hpsb_host *host) +{ + struct sbp2scsi_host_info *hi; + struct scsi_id_instance_data *scsi_id; + + hi = hpsb_get_hostinfo(&sbp2_highlevel, host); + + if (hi) { + list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) + scsi_block_requests(scsi_id->scsi_host); + } +} + + +/* + * This function is where we first pull the node unique ids, and then + * allocate memory and register a SBP-2 device. + */ +static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + struct scsi_device *sdev; + + SBP2_DEBUG("sbp2_start_device"); + + /* Login FIFO DMA */ + scsi_id->login_response = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response), + &scsi_id->login_response_dma); + if (!scsi_id->login_response) + goto alloc_fail; + SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); + + /* Query logins ORB DMA */ + scsi_id->query_logins_orb = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb), + &scsi_id->query_logins_orb_dma); + if (!scsi_id->query_logins_orb) + goto alloc_fail; + SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); + + /* Query logins response DMA */ + scsi_id->query_logins_response = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response), + &scsi_id->query_logins_response_dma); + if (!scsi_id->query_logins_response) + goto alloc_fail; + SBP2_DMA_ALLOC("consistent DMA region for query logins response"); + + /* Reconnect ORB DMA */ + scsi_id->reconnect_orb = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb), + &scsi_id->reconnect_orb_dma); + if (!scsi_id->reconnect_orb) + goto alloc_fail; + SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); + + /* Logout ORB DMA */ + scsi_id->logout_orb = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb), + &scsi_id->logout_orb_dma); + if (!scsi_id->logout_orb) + goto alloc_fail; + SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); + + /* Login ORB DMA */ + scsi_id->login_orb = + pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb), + &scsi_id->login_orb_dma); + if (!scsi_id->login_orb) { +alloc_fail: + if (scsi_id->query_logins_response) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_query_logins_response), + scsi_id->query_logins_response, + scsi_id->query_logins_response_dma); + SBP2_DMA_FREE("query logins response DMA"); + } + + if (scsi_id->query_logins_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_query_logins_orb), + scsi_id->query_logins_orb, + scsi_id->query_logins_orb_dma); + SBP2_DMA_FREE("query logins ORB DMA"); + } + + if (scsi_id->logout_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_logout_orb), + scsi_id->logout_orb, + scsi_id->logout_orb_dma); + SBP2_DMA_FREE("logout ORB DMA"); + } + + if (scsi_id->reconnect_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_reconnect_orb), + scsi_id->reconnect_orb, + scsi_id->reconnect_orb_dma); + SBP2_DMA_FREE("reconnect ORB DMA"); + } + + if (scsi_id->login_response) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_login_response), + scsi_id->login_response, + scsi_id->login_response_dma); + SBP2_DMA_FREE("login FIFO DMA"); + } + + list_del(&scsi_id->scsi_list); + + kfree(scsi_id); + + SBP2_ERR ("Could not allocate memory for scsi_id"); + + return -ENOMEM; + } + SBP2_DMA_ALLOC("consistent DMA region for login ORB"); + + SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); + + /* + * Create our command orb pool + */ + if (sbp2util_create_command_orb_pool(scsi_id)) { + SBP2_ERR("sbp2util_create_command_orb_pool failed!"); + sbp2_remove_device(scsi_id); + return -ENOMEM; + } + + /* Schedule a timeout here. The reason is that we may be so close + * to a bus reset, that the device is not available for logins. + * This can happen when the bus reset is caused by the host + * connected to the sbp2 device being removed. That host would + * have a certain amount of time to relogin before the sbp2 device + * allows someone else to login instead. One second makes sense. */ + msleep_interruptible(1000); + if (signal_pending(current)) { + SBP2_WARN("aborting sbp2_start_device due to event"); + sbp2_remove_device(scsi_id); + return -EINTR; + } + + /* + * Login to the sbp-2 device + */ + if (sbp2_login_device(scsi_id)) { + /* Login failed, just remove the device. */ + sbp2_remove_device(scsi_id); + return -EBUSY; + } + + /* + * Set max retries to something large on the device + */ + sbp2_set_busy_timeout(scsi_id); + + /* + * Do a SBP-2 fetch agent reset + */ + sbp2_agent_reset(scsi_id, 1); + + /* + * Get the max speed and packet size that we can use + */ + sbp2_max_speed_and_size(scsi_id); + + /* Add this device to the scsi layer now */ + sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); + if (IS_ERR(sdev)) { + SBP2_ERR("scsi_add_device failed"); + return PTR_ERR(sdev); + } + + return 0; +} + +/* + * This function removes an sbp2 device from the sbp2scsi_host_info struct. + */ +static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi; + + SBP2_DEBUG("sbp2_remove_device"); + + if (!scsi_id) + return; + + hi = scsi_id->hi; + + /* This will remove our scsi device aswell */ + if (scsi_id->scsi_host) { + scsi_remove_host(scsi_id->scsi_host); + scsi_host_put(scsi_id->scsi_host); + } + + sbp2util_remove_command_orb_pool(scsi_id); + + list_del(&scsi_id->scsi_list); + + if (scsi_id->login_response) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_login_response), + scsi_id->login_response, + scsi_id->login_response_dma); + SBP2_DMA_FREE("single login FIFO"); + } + + if (scsi_id->login_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_login_orb), + scsi_id->login_orb, + scsi_id->login_orb_dma); + SBP2_DMA_FREE("single login ORB"); + } + + if (scsi_id->reconnect_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_reconnect_orb), + scsi_id->reconnect_orb, + scsi_id->reconnect_orb_dma); + SBP2_DMA_FREE("single reconnect orb"); + } + + if (scsi_id->logout_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_logout_orb), + scsi_id->logout_orb, + scsi_id->logout_orb_dma); + SBP2_DMA_FREE("single logout orb"); + } + + if (scsi_id->query_logins_orb) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_query_logins_orb), + scsi_id->query_logins_orb, + scsi_id->query_logins_orb_dma); + SBP2_DMA_FREE("single query logins orb"); + } + + if (scsi_id->query_logins_response) { + pci_free_consistent(hi->host->pdev, + sizeof(struct sbp2_query_logins_response), + scsi_id->query_logins_response, + scsi_id->query_logins_response_dma); + SBP2_DMA_FREE("single query logins data"); + } + + scsi_id->ud->device.driver_data = NULL; + + SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); + + kfree(scsi_id); +} + +#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA +/* + * This function deals with physical dma write requests (for adapters that do not support + * physical dma in hardware). Mostly just here for debugging... + */ +static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data, + u64 addr, size_t length, u16 flags) +{ + + /* + * Manually put the data in the right place. + */ + memcpy(bus_to_virt((u32)addr), data, length); + sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr); + return(RCODE_COMPLETE); +} + +/* + * This function deals with physical dma read requests (for adapters that do not support + * physical dma in hardware). Mostly just here for debugging... + */ +static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data, + u64 addr, size_t length, u16 flags) +{ + + /* + * Grab data from memory and send a read response. + */ + memcpy(data, bus_to_virt((u32)addr), length); + sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr); + return(RCODE_COMPLETE); +} +#endif + + +/************************************** + * SBP-2 protocol related section + **************************************/ + +/* + * This function determines if we should convert scsi commands for a particular sbp2 device type + */ +static __inline__ int sbp2_command_conversion_device_type(u8 device_type) +{ + return (((device_type == TYPE_DISK) || + (device_type == TYPE_SDAD) || + (device_type == TYPE_ROM)) ? 1:0); +} + +/* + * This function queries the device for the maximum concurrent logins it + * supports. + */ +static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + quadlet_t data[2]; + int max_logins; + int active_logins; + + SBP2_DEBUG("sbp2_query_logins"); + + scsi_id->query_logins_orb->reserved1 = 0x0; + scsi_id->query_logins_orb->reserved2 = 0x0; + + scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; + scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); + SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); + + scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); + scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); + if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { + scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); + SBP2_DEBUG("sbp2_query_logins: set lun to %d", + ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); + } + SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); + + scsi_id->query_logins_orb->reserved_resp_length = + ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); + SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); + + scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + + SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); + scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | + SBP2_STATUS_FIFO_ADDRESS_HI); + SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); + + sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); + + SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); + + sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), + "sbp2 query logins orb", scsi_id->query_logins_orb_dma); + + memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); + memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); + + SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); + + data[0] = ORB_SET_NODE_ID(hi->host->node_id); + data[1] = scsi_id->query_logins_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + + atomic_set(&scsi_id->sbp2_login_complete, 0); + + SBP2_DEBUG("sbp2_query_logins: prepared to write"); + hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); + SBP2_DEBUG("sbp2_query_logins: written"); + + if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { + SBP2_INFO("Error querying logins to SBP-2 device - timed out"); + return(-EIO); + } + + if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { + SBP2_INFO("Error querying logins to SBP-2 device - timed out"); + return(-EIO); + } + + if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { + + SBP2_INFO("Error querying logins to SBP-2 device - timed out"); + return(-EIO); + } + + sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); + + SBP2_DEBUG("length_max_logins = %x", + (unsigned int)scsi_id->query_logins_response->length_max_logins); + + SBP2_DEBUG("Query logins to SBP-2 device successful"); + + max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); + SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); + + active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); + SBP2_DEBUG("Number of active logins: %d", active_logins); + + if (active_logins >= max_logins) { + return(-EIO); + } + + return 0; +} + +/* + * This function is called in order to login to a particular SBP-2 device, + * after a bus reset. + */ +static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + quadlet_t data[2]; + + SBP2_DEBUG("sbp2_login_device"); + + if (!scsi_id->login_orb) { + SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); + return(-EIO); + } + + if (!exclusive_login) { + if (sbp2_query_logins(scsi_id)) { + SBP2_INFO("Device does not support any more concurrent logins"); + return(-EIO); + } + } + + /* Set-up login ORB, assume no password */ + scsi_id->login_orb->password_hi = 0; + scsi_id->login_orb->password_lo = 0; + SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); + + scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; + scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); + SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); + + scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); + scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ + scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ + scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ + /* Set the lun if we were able to pull it from the device's unit directory */ + if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { + scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); + SBP2_DEBUG("sbp2_query_logins: set lun to %d", + ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); + } + SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); + + scsi_id->login_orb->passwd_resp_lengths = + ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); + SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); + + scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + + SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); + scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | + SBP2_STATUS_FIFO_ADDRESS_HI); + SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); + + /* + * Byte swap ORB if necessary + */ + sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); + + SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); + + sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), + "sbp2 login orb", scsi_id->login_orb_dma); + + /* + * Initialize login response and status fifo + */ + memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); + memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); + + SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); + + /* + * Ok, let's write to the target's management agent register + */ + data[0] = ORB_SET_NODE_ID(hi->host->node_id); + data[1] = scsi_id->login_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + + atomic_set(&scsi_id->sbp2_login_complete, 0); + + SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", + (unsigned int)scsi_id->sbp2_management_agent_addr); + hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); + SBP2_DEBUG("sbp2_login_device: written"); + + /* + * Wait for login status (up to 20 seconds)... + */ + if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { + SBP2_ERR("Error logging into SBP-2 device - login timed-out"); + return(-EIO); + } + + /* + * Sanity. Make sure status returned matches login orb. + */ + if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { + SBP2_ERR("Error logging into SBP-2 device - login timed-out"); + return(-EIO); + } + + /* + * Check status + */ + if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { + + SBP2_ERR("Error logging into SBP-2 device - login failed"); + return(-EIO); + } + + /* + * Byte swap the login response, for use when reconnecting or + * logging out. + */ + sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); + + /* + * Grab our command block agent address from the login response. + */ + SBP2_DEBUG("command_block_agent_hi = %x", + (unsigned int)scsi_id->login_response->command_block_agent_hi); + SBP2_DEBUG("command_block_agent_lo = %x", + (unsigned int)scsi_id->login_response->command_block_agent_lo); + + scsi_id->sbp2_command_block_agent_addr = + ((u64)scsi_id->login_response->command_block_agent_hi) << 32; + scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); + scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; + + SBP2_INFO("Logged into SBP-2 device"); + + return(0); + +} + +/* + * This function is called in order to logout from a particular SBP-2 + * device, usually called during driver unload. + */ +static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + quadlet_t data[2]; + int error; + + SBP2_DEBUG("sbp2_logout_device"); + + /* + * Set-up logout ORB + */ + scsi_id->logout_orb->reserved1 = 0x0; + scsi_id->logout_orb->reserved2 = 0x0; + scsi_id->logout_orb->reserved3 = 0x0; + scsi_id->logout_orb->reserved4 = 0x0; + + scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); + scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); + + /* Notify us when complete */ + scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); + + scsi_id->logout_orb->reserved5 = 0x0; + scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + + SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); + scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | + SBP2_STATUS_FIFO_ADDRESS_HI); + + /* + * Byte swap ORB if necessary + */ + sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); + + sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), + "sbp2 logout orb", scsi_id->logout_orb_dma); + + /* + * Ok, let's write to the target's management agent register + */ + data[0] = ORB_SET_NODE_ID(hi->host->node_id); + data[1] = scsi_id->logout_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + + atomic_set(&scsi_id->sbp2_login_complete, 0); + + error = hpsb_node_write(scsi_id->ne, + scsi_id->sbp2_management_agent_addr, + data, 8); + if (error) + return error; + + /* Wait for device to logout...1 second. */ + if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) + return -EIO; + + SBP2_INFO("Logged out of SBP-2 device"); + + return(0); + +} + +/* + * This function is called in order to reconnect to a particular SBP-2 + * device, after a bus reset. + */ +static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + quadlet_t data[2]; + int error; + + SBP2_DEBUG("sbp2_reconnect_device"); + + /* + * Set-up reconnect ORB + */ + scsi_id->reconnect_orb->reserved1 = 0x0; + scsi_id->reconnect_orb->reserved2 = 0x0; + scsi_id->reconnect_orb->reserved3 = 0x0; + scsi_id->reconnect_orb->reserved4 = 0x0; + + scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); + scsi_id->reconnect_orb->login_ID_misc |= + ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); + + /* Notify us when complete */ + scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); + + scsi_id->reconnect_orb->reserved5 = 0x0; + scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + + SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); + scsi_id->reconnect_orb->status_FIFO_hi = + (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); + + /* + * Byte swap ORB if necessary + */ + sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); + + sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), + "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); + + /* + * Initialize status fifo + */ + memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); + + /* + * Ok, let's write to the target's management agent register + */ + data[0] = ORB_SET_NODE_ID(hi->host->node_id); + data[1] = scsi_id->reconnect_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + + atomic_set(&scsi_id->sbp2_login_complete, 0); + + error = hpsb_node_write(scsi_id->ne, + scsi_id->sbp2_management_agent_addr, + data, 8); + if (error) + return error; + + /* + * Wait for reconnect status (up to 1 second)... + */ + if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { + SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); + return(-EIO); + } + + /* + * Sanity. Make sure status returned matches reconnect orb. + */ + if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { + SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); + return(-EIO); + } + + /* + * Check status + */ + if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || + STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { + + SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); + return(-EIO); + } + + HPSB_DEBUG("Reconnected to SBP-2 device"); + + return(0); + +} + +/* + * This function is called in order to set the busy timeout (number of + * retries to attempt) on the sbp2 device. + */ +static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) +{ + quadlet_t data; + + SBP2_DEBUG("sbp2_set_busy_timeout"); + + /* + * Ok, let's write to the target's busy timeout register + */ + data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); + + if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { + SBP2_ERR("sbp2_set_busy_timeout error"); + } + + return(0); +} + + +/* + * This function is called to parse sbp2 device's config rom unit + * directory. Used to determine things like sbp2 management agent offset, + * and command set used (SCSI or RBC). + */ +static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, + struct unit_directory *ud) +{ + struct csr1212_keyval *kv; + struct csr1212_dentry *dentry; + u64 management_agent_addr; + u32 command_set_spec_id, command_set, unit_characteristics, + firmware_revision, workarounds; + int i; + + SBP2_DEBUG("sbp2_parse_unit_directory"); + + management_agent_addr = 0x0; + command_set_spec_id = 0x0; + command_set = 0x0; + unit_characteristics = 0x0; + firmware_revision = 0x0; + + /* Handle different fields in the unit directory, based on keys */ + csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { + switch (kv->key.id) { + case CSR1212_KV_ID_DEPENDENT_INFO: + if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { + /* Save off the management agent address */ + management_agent_addr = + CSR1212_REGISTER_SPACE_BASE + + (kv->value.csr_offset << 2); + + SBP2_DEBUG("sbp2_management_agent_addr = %x", + (unsigned int) management_agent_addr); + } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { + scsi_id->sbp2_device_type_and_lun = kv->value.immediate; + } + break; + + case SBP2_COMMAND_SET_SPEC_ID_KEY: + /* Command spec organization */ + command_set_spec_id = kv->value.immediate; + SBP2_DEBUG("sbp2_command_set_spec_id = %x", + (unsigned int) command_set_spec_id); + break; + + case SBP2_COMMAND_SET_KEY: + /* Command set used by sbp2 device */ + command_set = kv->value.immediate; + SBP2_DEBUG("sbp2_command_set = %x", + (unsigned int) command_set); + break; + + case SBP2_UNIT_CHARACTERISTICS_KEY: + /* + * Unit characterisitcs (orb related stuff + * that I'm not yet paying attention to) + */ + unit_characteristics = kv->value.immediate; + SBP2_DEBUG("sbp2_unit_characteristics = %x", + (unsigned int) unit_characteristics); + break; + + case SBP2_FIRMWARE_REVISION_KEY: + /* Firmware revision */ + firmware_revision = kv->value.immediate; + if (force_inquiry_hack) + SBP2_INFO("sbp2_firmware_revision = %x", + (unsigned int) firmware_revision); + else SBP2_DEBUG("sbp2_firmware_revision = %x", + (unsigned int) firmware_revision); + break; + + default: + break; + } + } + + /* This is the start of our broken device checking. We try to hack + * around oddities and known defects. */ + workarounds = 0x0; + + /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a + * bridge with 128KB max transfer size limitation. For sanity, we + * only voice this when the current max_sectors setting + * exceeds the 128k limit. By default, that is not the case. + * + * It would be really nice if we could detect this before the scsi + * host gets initialized. That way we can down-force the + * max_sectors to account for it. That is not currently + * possible. */ + if ((firmware_revision & 0xffff00) == + SBP2_128KB_BROKEN_FIRMWARE && + (max_sectors * 512) > (128*1024)) { + SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", + NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); + SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", + max_sectors); + workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; + } + + /* Check for a blacklisted set of devices that require us to force + * a 36 byte host inquiry. This can be overriden as a module param + * (to force all hosts). */ + for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { + if ((firmware_revision & 0xffff00) == + sbp2_broken_inquiry_list[i]) { + SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", + NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); + workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; + break; /* No need to continue. */ + } + } + + /* If this is a logical unit directory entry, process the parent + * to get the values. */ + if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { + struct unit_directory *parent_ud = + container_of(ud->device.parent, struct unit_directory, device); + sbp2_parse_unit_directory(scsi_id, parent_ud); + } else { + scsi_id->sbp2_management_agent_addr = management_agent_addr; + scsi_id->sbp2_command_set_spec_id = command_set_spec_id; + scsi_id->sbp2_command_set = command_set; + scsi_id->sbp2_unit_characteristics = unit_characteristics; + scsi_id->sbp2_firmware_revision = firmware_revision; + scsi_id->workarounds = workarounds; + if (ud->flags & UNIT_DIRECTORY_HAS_LUN) + scsi_id->sbp2_device_type_and_lun = ud->lun; + } +} + +/* + * This function is called in order to determine the max speed and packet + * size we can use in our ORBs. Note, that we (the driver and host) only + * initiate the transaction. The SBP-2 device actually transfers the data + * (by reading from the DMA area we tell it). This means that the SBP-2 + * device decides the actual maximum data it can transfer. We just tell it + * the speed that it needs to use, and the max_rec the host supports, and + * it takes care of the rest. + */ +static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + + SBP2_DEBUG("sbp2_max_speed_and_size"); + + /* Initial setting comes from the hosts speed map */ + scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + + NODEID_TO_NODE(scsi_id->ne->nodeid)]; + + /* Bump down our speed if the user requested it */ + if (scsi_id->speed_code > max_speed) { + scsi_id->speed_code = max_speed; + SBP2_ERR("Forcing SBP-2 max speed down to %s", + hpsb_speedto_str[scsi_id->speed_code]); + } + + /* Payload size is the lesser of what our speed supports and what + * our host supports. */ + scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code], + (u8)(hi->host->csr.max_rec - 1)); + + HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", + NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), + hpsb_speedto_str[scsi_id->speed_code], + 1 << ((u32)scsi_id->max_payload_size + 2)); + + return(0); +} + +/* + * This function is called in order to perform a SBP-2 agent reset. + */ +static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) +{ + quadlet_t data; + u64 addr; + int retval; + + SBP2_DEBUG("sbp2_agent_reset"); + + /* + * Ok, let's write to the target's management agent register + */ + data = ntohl(SBP2_AGENT_RESET_DATA); + addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; + + if (wait) + retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); + else + retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); + + if (retval < 0) { + SBP2_ERR("hpsb_node_write failed.\n"); + return -EIO; + } + + /* + * Need to make sure orb pointer is written on next command + */ + scsi_id->last_orb = NULL; + + return(0); +} + +/* + * This function is called to create the actual command orb and s/g list + * out of the scsi command itself. + */ +static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, + struct sbp2_command_info *command, + unchar *scsi_cmd, + unsigned int scsi_use_sg, + unsigned int scsi_request_bufflen, + void *scsi_request_buffer, + enum dma_data_direction dma_dir) + +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer; + struct sbp2_command_orb *command_orb = &command->command_orb; + struct sbp2_unrestricted_page_table *scatter_gather_element = + &command->scatter_gather_element[0]; + u32 sg_count, sg_len, orb_direction; + dma_addr_t sg_addr; + int i; + + /* + * Set-up our command ORB.. + * + * NOTE: We're doing unrestricted page tables (s/g), as this is + * best performance (at least with the devices I have). This means + * that data_size becomes the number of s/g elements, and + * page_size should be zero (for unrestricted). + */ + command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); + command_orb->next_ORB_lo = 0x0; + command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); + command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); + command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ + + /* + * Get the direction of the transfer. If the direction is unknown, then use our + * goofy table as a back-up. + */ + switch (dma_dir) { + case DMA_NONE: + orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; + break; + case DMA_TO_DEVICE: + orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; + break; + case DMA_FROM_DEVICE: + orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; + break; + case DMA_BIDIRECTIONAL: + default: + SBP2_ERR("SCSI data transfer direction not specified. " + "Update the SBP2 direction table in sbp2.h if " + "necessary for your application"); + __scsi_print_command(scsi_cmd); + orb_direction = sbp2scsi_direction_table[*scsi_cmd]; + break; + } + + /* + * Set-up our pagetable stuff... unfortunately, this has become + * messier than I'd like. Need to clean this up a bit. ;-) + */ + if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { + + SBP2_DEBUG("No data transfer"); + + /* + * Handle no data transfer + */ + command_orb->data_descriptor_hi = 0x0; + command_orb->data_descriptor_lo = 0x0; + command_orb->misc |= ORB_SET_DIRECTION(1); + + } else if (scsi_use_sg) { + + SBP2_DEBUG("Use scatter/gather"); + + /* + * Special case if only one element (and less than 64KB in size) + */ + if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { + + SBP2_DEBUG("Only one s/g element"); + command->dma_dir = dma_dir; + command->dma_size = sgpnt[0].length; + command->dma_type = CMD_DMA_PAGE; + command->cmd_dma = pci_map_page(hi->host->pdev, + sgpnt[0].page, + sgpnt[0].offset, + command->dma_size, + command->dma_dir); + SBP2_DMA_ALLOC("single page scatter element"); + + command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + command_orb->data_descriptor_lo = command->cmd_dma; + command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); + command_orb->misc |= ORB_SET_DIRECTION(orb_direction); + + } else { + int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir); + SBP2_DMA_ALLOC("scatter list"); + + command->dma_size = scsi_use_sg; + command->dma_dir = dma_dir; + command->sge_buffer = sgpnt; + + /* use page tables (s/g) */ + command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); + command_orb->misc |= ORB_SET_DIRECTION(orb_direction); + command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + command_orb->data_descriptor_lo = command->sge_dma; + + /* + * Loop through and fill out our sbp-2 page tables + * (and split up anything too large) + */ + for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { + sg_len = sg_dma_len(sgpnt); + sg_addr = sg_dma_address(sgpnt); + while (sg_len) { + scatter_gather_element[sg_count].segment_base_lo = sg_addr; + if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { + scatter_gather_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); + sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; + sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; + } else { + scatter_gather_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); + sg_len = 0; + } + sg_count++; + } + } + + /* Number of page table (s/g) elements */ + command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); + + sbp2util_packet_dump(scatter_gather_element, + (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, + "sbp2 s/g list", command->sge_dma); + + /* + * Byte swap page tables if necessary + */ + sbp2util_cpu_to_be32_buffer(scatter_gather_element, + (sizeof(struct sbp2_unrestricted_page_table)) * + sg_count); + + } + + } else { + + SBP2_DEBUG("No scatter/gather"); + + command->dma_dir = dma_dir; + command->dma_size = scsi_request_bufflen; + command->dma_type = CMD_DMA_SINGLE; + command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer, + command->dma_size, + command->dma_dir); + SBP2_DMA_ALLOC("single bulk"); + + /* + * Handle case where we get a command w/o s/g enabled (but + * check for transfers larger than 64K) + */ + if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { + + command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + command_orb->data_descriptor_lo = command->cmd_dma; + command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); + command_orb->misc |= ORB_SET_DIRECTION(orb_direction); + + /* + * Sanity, in case our direction table is not + * up-to-date + */ + if (!scsi_request_bufflen) { + command_orb->data_descriptor_hi = 0x0; + command_orb->data_descriptor_lo = 0x0; + command_orb->misc |= ORB_SET_DIRECTION(1); + } + + } else { + /* + * Need to turn this into page tables, since the + * buffer is too large. + */ + command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); + command_orb->data_descriptor_lo = command->sge_dma; + + /* Use page tables (s/g) */ + command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); + command_orb->misc |= ORB_SET_DIRECTION(orb_direction); + + /* + * fill out our sbp-2 page tables (and split up + * the large buffer) + */ + sg_count = 0; + sg_len = scsi_request_bufflen; + sg_addr = command->cmd_dma; + while (sg_len) { + scatter_gather_element[sg_count].segment_base_lo = sg_addr; + if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { + scatter_gather_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); + sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; + sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; + } else { + scatter_gather_element[sg_count].length_segment_base_hi = + PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); + sg_len = 0; + } + sg_count++; + } + + /* Number of page table (s/g) elements */ + command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); + + sbp2util_packet_dump(scatter_gather_element, + (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, + "sbp2 s/g list", command->sge_dma); + + /* + * Byte swap page tables if necessary + */ + sbp2util_cpu_to_be32_buffer(scatter_gather_element, + (sizeof(struct sbp2_unrestricted_page_table)) * + sg_count); + + } + + } + + /* + * Byte swap command ORB if necessary + */ + sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); + + /* + * Put our scsi command in the command ORB + */ + memset(command_orb->cdb, 0, 12); + memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); + + return(0); +} + +/* + * This function is called in order to begin a regular SBP-2 command. + */ +static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, + struct sbp2_command_info *command) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + struct sbp2_command_orb *command_orb = &command->command_orb; + struct node_entry *ne = scsi_id->ne; + u64 addr; + + outstanding_orb_incr; + SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", + command_orb, global_outstanding_command_orbs); + + pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + /* + * Check to see if there are any previous orbs to use + */ + if (scsi_id->last_orb == NULL) { + quadlet_t data[2]; + + /* + * Ok, let's write to the target's management agent register + */ + addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; + data[0] = ORB_SET_NODE_ID(hi->host->node_id); + data[1] = command->command_orb_dma; + sbp2util_cpu_to_be32_buffer(data, 8); + + SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); + + if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { + SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); + return -EIO; + } + + SBP2_ORB_DEBUG("write command agent complete"); + + scsi_id->last_orb = command_orb; + scsi_id->last_orb_dma = command->command_orb_dma; + + } else { + quadlet_t data; + + /* + * We have an orb already sent (maybe or maybe not + * processed) that we can append this orb to. So do so, + * and ring the doorbell. Have to be very careful + * modifying these next orb pointers, as they are accessed + * both by the sbp2 device and us. + */ + scsi_id->last_orb->next_ORB_lo = + cpu_to_be32(command->command_orb_dma); + /* Tells hardware that this pointer is valid */ + scsi_id->last_orb->next_ORB_hi = 0x0; + pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + + /* + * Ring the doorbell + */ + data = cpu_to_be32(command->command_orb_dma); + addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; + + SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); + + if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { + SBP2_ERR("sbp2util_node_write_no_wait failed"); + return(-EIO); + } + + scsi_id->last_orb = command_orb; + scsi_id->last_orb_dma = command->command_orb_dma; + + } + return(0); +} + +/* + * This function is called in order to begin a regular SBP-2 command. + */ +static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, + struct scsi_cmnd *SCpnt, + void (*done)(struct scsi_cmnd *)) +{ + unchar *cmd = (unchar *) SCpnt->cmnd; + unsigned int request_bufflen = SCpnt->request_bufflen; + struct sbp2_command_info *command; + + SBP2_DEBUG("sbp2_send_command"); +#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) + printk("[scsi command]\n "); + scsi_print_command(SCpnt); +#endif + SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); + SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); + + /* + * Allocate a command orb and s/g structure + */ + command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); + if (!command) { + return(-EIO); + } + + /* + * The scsi stack sends down a request_bufflen which does not match the + * length field in the scsi cdb. This causes some sbp2 devices to + * reject this inquiry command. Fix the request_bufflen. + */ + if (*cmd == INQUIRY) { + if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) + request_bufflen = cmd[4] = 0x24; + else + request_bufflen = cmd[4]; + } + + /* + * Now actually fill in the comamnd orb and sbp2 s/g list + */ + sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, + request_bufflen, SCpnt->request_buffer, + SCpnt->sc_data_direction); + /* + * Update our cdb if necessary (to handle sbp2 RBC command set + * differences). This is where the command set hacks go! =) + */ + sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb); + + sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), + "sbp2 command orb", command->command_orb_dma); + + /* + * Initialize status fifo + */ + memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); + + /* + * Link up the orb, and ring the doorbell if needed + */ + sbp2_link_orb_command(scsi_id, command); + + return(0); +} + + +/* + * This function deals with command set differences between Linux scsi + * command set and sbp2 RBC command set. + */ +static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd) +{ + unchar new_cmd[16]; + u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun); + + SBP2_DEBUG("sbp2_check_sbp2_command"); + + switch (*cmd) { + + case READ_6: + + if (sbp2_command_conversion_device_type(device_type)) { + + SBP2_DEBUG("Convert READ_6 to READ_10"); + + /* + * Need to turn read_6 into read_10 + */ + new_cmd[0] = 0x28; + new_cmd[1] = (cmd[1] & 0xe0); + new_cmd[2] = 0x0; + new_cmd[3] = (cmd[1] & 0x1f); + new_cmd[4] = cmd[2]; + new_cmd[5] = cmd[3]; + new_cmd[6] = 0x0; + new_cmd[7] = 0x0; + new_cmd[8] = cmd[4]; + new_cmd[9] = cmd[5]; + + memcpy(cmd, new_cmd, 10); + + } + + break; + + case WRITE_6: + + if (sbp2_command_conversion_device_type(device_type)) { + + SBP2_DEBUG("Convert WRITE_6 to WRITE_10"); + + /* + * Need to turn write_6 into write_10 + */ + new_cmd[0] = 0x2a; + new_cmd[1] = (cmd[1] & 0xe0); + new_cmd[2] = 0x0; + new_cmd[3] = (cmd[1] & 0x1f); + new_cmd[4] = cmd[2]; + new_cmd[5] = cmd[3]; + new_cmd[6] = 0x0; + new_cmd[7] = 0x0; + new_cmd[8] = cmd[4]; + new_cmd[9] = cmd[5]; + + memcpy(cmd, new_cmd, 10); + + } + + break; + + case MODE_SENSE: + + if (sbp2_command_conversion_device_type(device_type)) { + + SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10"); + + /* + * Need to turn mode_sense_6 into mode_sense_10 + */ + new_cmd[0] = 0x5a; + new_cmd[1] = cmd[1]; + new_cmd[2] = cmd[2]; + new_cmd[3] = 0x0; + new_cmd[4] = 0x0; + new_cmd[5] = 0x0; + new_cmd[6] = 0x0; + new_cmd[7] = 0x0; + new_cmd[8] = cmd[4]; + new_cmd[9] = cmd[5]; + + memcpy(cmd, new_cmd, 10); + + } + + break; + + case MODE_SELECT: + + /* + * TODO. Probably need to change mode select to 10 byte version + */ + + default: + break; + } + + return; +} + +/* + * Translates SBP-2 status into SCSI sense data for check conditions + */ +static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) +{ + SBP2_DEBUG("sbp2_status_to_sense_data"); + + /* + * Ok, it's pretty ugly... ;-) + */ + sense_data[0] = 0x70; + sense_data[1] = 0x0; + sense_data[2] = sbp2_status[9]; + sense_data[3] = sbp2_status[12]; + sense_data[4] = sbp2_status[13]; + sense_data[5] = sbp2_status[14]; + sense_data[6] = sbp2_status[15]; + sense_data[7] = 10; + sense_data[8] = sbp2_status[16]; + sense_data[9] = sbp2_status[17]; + sense_data[10] = sbp2_status[18]; + sense_data[11] = sbp2_status[19]; + sense_data[12] = sbp2_status[10]; + sense_data[13] = sbp2_status[11]; + sense_data[14] = sbp2_status[20]; + sense_data[15] = sbp2_status[21]; + + return(sbp2_status[8] & 0x3f); /* return scsi status */ +} + +/* + * This function is called after a command is completed, in order to do any necessary SBP-2 + * response data translations for the SCSI stack + */ +static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, + struct scsi_cmnd *SCpnt) +{ + u8 *scsi_buf = SCpnt->request_buffer; + u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun); + + SBP2_DEBUG("sbp2_check_sbp2_response"); + + switch (SCpnt->cmnd[0]) { + + case INQUIRY: + + /* + * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill + * this information in from the inquiry response data. Lun is set to zero. + */ + if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { + SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data"); + scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16; + } + + /* + * Make sure data length is ok. Minimum length is 36 bytes + */ + if (scsi_buf[4] == 0) { + scsi_buf[4] = 36 - 5; + } + + /* + * Check for Simple Direct Access Device and change it to TYPE_DISK + */ + if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) { + SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK"); + scsi_buf[0] &= 0xe0; + } + + /* + * Fix ansi revision and response data format + */ + scsi_buf[2] |= 2; + scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; + + break; + + case MODE_SENSE: + + if (sbp2_command_conversion_device_type(device_type)) { + + SBP2_DEBUG("Modify mode sense response (10 byte version)"); + + scsi_buf[0] = scsi_buf[1]; /* Mode data length */ + scsi_buf[1] = scsi_buf[2]; /* Medium type */ + scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */ + scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */ + memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]); + } + + break; + + case MODE_SELECT: + + /* + * TODO. Probably need to change mode select to 10 byte version + */ + + default: + break; + } + return; +} + +/* + * This function deals with status writes from the SBP-2 device + */ +static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, + quadlet_t *data, u64 addr, size_t length, u16 fl) +{ + struct sbp2scsi_host_info *hi; + struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; + u32 id; + struct scsi_cmnd *SCpnt = NULL; + u32 scsi_status = SBP2_SCSI_STATUS_GOOD; + struct sbp2_command_info *command; + + SBP2_DEBUG("sbp2_handle_status_write"); + + sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); + + if (!host) { + SBP2_ERR("host is NULL - this is bad!"); + return(RCODE_ADDRESS_ERROR); + } + + hi = hpsb_get_hostinfo(&sbp2_highlevel, host); + + if (!hi) { + SBP2_ERR("host info is NULL - this is bad!"); + return(RCODE_ADDRESS_ERROR); + } + + /* + * Find our scsi_id structure by looking at the status fifo address written to by + * the sbp2 device. + */ + id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); + list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { + if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { + scsi_id = scsi_id_tmp; + break; + } + } + + if (!scsi_id) { + SBP2_ERR("scsi_id is NULL - device is gone?"); + return(RCODE_ADDRESS_ERROR); + } + + /* + * Put response into scsi_id status fifo... + */ + memcpy(&scsi_id->status_block, data, length); + + /* + * Byte swap first two quadlets (8 bytes) of status for processing + */ + sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); + + /* + * Handle command ORB status here if necessary. First, need to match status with command. + */ + command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); + if (command) { + + SBP2_DEBUG("Found status for command ORB"); + pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + + SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); + outstanding_orb_decr; + + /* + * Matched status with command, now grab scsi command pointers and check status + */ + SCpnt = command->Current_SCpnt; + sbp2util_mark_command_completed(scsi_id, command); + + if (SCpnt) { + + /* + * See if the target stored any scsi status information + */ + if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { + /* + * Translate SBP-2 status to SCSI sense data + */ + SBP2_DEBUG("CHECK CONDITION"); + scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); + } + + /* + * Check to see if the dead bit is set. If so, we'll have to initiate + * a fetch agent reset. + */ + if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { + + /* + * Initiate a fetch agent reset. + */ + SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); + sbp2_agent_reset(scsi_id, 0); + } + + SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); + } + + /* + * Check here to see if there are no commands in-use. If there are none, we can + * null out last orb so that next time around we write directly to the orb pointer... + * Quick start saves one 1394 bus transaction. + */ + if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { + scsi_id->last_orb = NULL; + } + + } else { + + /* + * It's probably a login/logout/reconnect status. + */ + if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || + (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || + (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || + (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { + atomic_set(&scsi_id->sbp2_login_complete, 1); + } + } + + if (SCpnt) { + + /* Complete the SCSI command. */ + SBP2_DEBUG("Completing SCSI command"); + sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, + command->Current_done); + SBP2_ORB_DEBUG("command orb completed"); + } + + return(RCODE_COMPLETE); +} + + +/************************************** + * SCSI interface related section + **************************************/ + +/* + * This routine is the main request entry routine for doing I/O. It is + * called from the scsi stack directly. + */ +static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, + void (*done)(struct scsi_cmnd *)) +{ + struct scsi_id_instance_data *scsi_id = + (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; + struct sbp2scsi_host_info *hi; + + SBP2_DEBUG("sbp2scsi_queuecommand"); + + /* + * If scsi_id is null, it means there is no device in this slot, + * so we should return selection timeout. + */ + if (!scsi_id) { + SCpnt->result = DID_NO_CONNECT << 16; + done (SCpnt); + return 0; + } + + hi = scsi_id->hi; + + if (!hi) { + SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); + SCpnt->result = DID_NO_CONNECT << 16; + done (SCpnt); + return(0); + } + + /* + * Until we handle multiple luns, just return selection time-out + * to any IO directed at non-zero LUNs + */ + if (SCpnt->device->lun) { + SCpnt->result = DID_NO_CONNECT << 16; + done (SCpnt); + return(0); + } + + /* + * Check for request sense command, and handle it here + * (autorequest sense) + */ + if (SCpnt->cmnd[0] == REQUEST_SENSE) { + SBP2_DEBUG("REQUEST_SENSE"); + memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); + memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); + sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); + return(0); + } + + /* + * Check to see if we are in the middle of a bus reset. + */ + if (!hpsb_node_entry_valid(scsi_id->ne)) { + SBP2_ERR("Bus reset in progress - rejecting command"); + SCpnt->result = DID_BUS_BUSY << 16; + done (SCpnt); + return(0); + } + + /* + * Try and send our SCSI command + */ + if (sbp2_send_command(scsi_id, SCpnt, done)) { + SBP2_ERR("Error sending SCSI command"); + sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, + SCpnt, done); + } + + return(0); +} + +/* + * This function is called in order to complete all outstanding SBP-2 + * commands (in case of resets, etc.). + */ +static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, + u32 status) +{ + struct sbp2scsi_host_info *hi = scsi_id->hi; + struct list_head *lh; + struct sbp2_command_info *command; + + SBP2_DEBUG("sbp2scsi_complete_all_commands"); + + while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { + SBP2_DEBUG("Found pending command to complete"); + lh = scsi_id->sbp2_command_orb_inuse.next; + command = list_entry(lh, struct sbp2_command_info, list); + pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + sbp2util_mark_command_completed(scsi_id, command); + if (command->Current_SCpnt) { + command->Current_SCpnt->result = status << 16; + command->Current_done(command->Current_SCpnt); + } + } + + return; +} + +/* + * This function is called in order to complete a regular SBP-2 command. + * + * This can be called in interrupt context. + */ +static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, + u32 scsi_status, struct scsi_cmnd *SCpnt, + void (*done)(struct scsi_cmnd *)) +{ + unsigned long flags; + + SBP2_DEBUG("sbp2scsi_complete_command"); + + /* + * Sanity + */ + if (!SCpnt) { + SBP2_ERR("SCpnt is NULL"); + return; + } + + /* + * If a bus reset is in progress and there was an error, don't + * complete the command, just let it get retried at the end of the + * bus reset. + */ + if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { + SBP2_ERR("Bus reset in progress - retry command later"); + return; + } + + /* + * Switch on scsi status + */ + switch (scsi_status) { + case SBP2_SCSI_STATUS_GOOD: + SCpnt->result = DID_OK; + break; + + case SBP2_SCSI_STATUS_BUSY: + SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); + SCpnt->result = DID_BUS_BUSY << 16; + break; + + case SBP2_SCSI_STATUS_CHECK_CONDITION: + SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); + SCpnt->result = CHECK_CONDITION << 1; + + /* + * Debug stuff + */ +#if CONFIG_IEEE1394_SBP2_DEBUG >= 1 + scsi_print_command(SCpnt); + scsi_print_sense("bh", SCpnt); +#endif + + break; + + case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: + SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); + SCpnt->result = DID_NO_CONNECT << 16; + scsi_print_command(SCpnt); + break; + + case SBP2_SCSI_STATUS_CONDITION_MET: + case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: + case SBP2_SCSI_STATUS_COMMAND_TERMINATED: + SBP2_ERR("Bad SCSI status = %x", scsi_status); + SCpnt->result = DID_ERROR << 16; + scsi_print_command(SCpnt); + break; + + default: + SBP2_ERR("Unsupported SCSI status = %x", scsi_status); + SCpnt->result = DID_ERROR << 16; + } + + /* + * Take care of any sbp2 response data mucking here (RBC stuff, etc.) + */ + if (SCpnt->result == DID_OK) { + sbp2_check_sbp2_response(scsi_id, SCpnt); + } + + /* + * If a bus reset is in progress and there was an error, complete + * the command as busy so that it will get retried. + */ + if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { + SBP2_ERR("Completing command with busy (bus reset)"); + SCpnt->result = DID_BUS_BUSY << 16; + } + + /* + * If a unit attention occurs, return busy status so it gets + * retried... it could have happened because of a 1394 bus reset + * or hot-plug... + */ +#if 0 + if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && + (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { + SBP2_DEBUG("UNIT ATTENTION - return busy"); + SCpnt->result = DID_BUS_BUSY << 16; + } +#endif + + /* + * Tell scsi stack that we're done with this command + */ + spin_lock_irqsave(scsi_id->scsi_host->host_lock,flags); + done (SCpnt); + spin_unlock_irqrestore(scsi_id->scsi_host->host_lock,flags); + + return; +} + + +static int sbp2scsi_slave_configure (struct scsi_device *sdev) +{ + blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); + + return 0; +} + + +/* + * Called by scsi stack when something has really gone wrong. Usually + * called when a command has timed-out for some reason. + */ +static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) +{ + struct scsi_id_instance_data *scsi_id = + (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; + struct sbp2scsi_host_info *hi = scsi_id->hi; + struct sbp2_command_info *command; + + SBP2_ERR("aborting sbp2 command"); + scsi_print_command(SCpnt); + + if (scsi_id) { + + /* + * Right now, just return any matching command structures + * to the free pool. + */ + command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); + if (command) { + SBP2_DEBUG("Found command to abort"); + pci_dma_sync_single_for_cpu(hi->host->pdev, + command->command_orb_dma, + sizeof(struct sbp2_command_orb), + PCI_DMA_BIDIRECTIONAL); + pci_dma_sync_single_for_cpu(hi->host->pdev, + command->sge_dma, + sizeof(command->scatter_gather_element), + PCI_DMA_BIDIRECTIONAL); + sbp2util_mark_command_completed(scsi_id, command); + if (command->Current_SCpnt) { + command->Current_SCpnt->result = DID_ABORT << 16; + command->Current_done(command->Current_SCpnt); + } + } + + /* + * Initiate a fetch agent reset. + */ + sbp2_agent_reset(scsi_id, 0); + sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); + } + + return(SUCCESS); +} + +/* + * Called by scsi stack when something has really gone wrong. + */ +static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) +{ + struct scsi_id_instance_data *scsi_id = + (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; + + SBP2_ERR("reset requested"); + + if (scsi_id) { + SBP2_ERR("Generating sbp2 fetch agent reset"); + sbp2_agent_reset(scsi_id, 0); + } + + return(SUCCESS); +} + +static const char *sbp2scsi_info (struct Scsi_Host *host) +{ + return "SCSI emulation for IEEE-1394 SBP-2 Devices"; +} + +static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, char *buf) +{ + struct scsi_device *sdev; + struct scsi_id_instance_data *scsi_id; + int lun; + + if (!(sdev = to_scsi_device(dev))) + return 0; + + if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) + return 0; + + if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) + lun = 0; + else + lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); + + return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, + scsi_id->ud->id, lun); +} +static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); + +static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { + &dev_attr_ieee1394_id, + NULL +}; + +MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); +MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); +MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); +MODULE_LICENSE("GPL"); + +/* SCSI host template */ +static struct scsi_host_template scsi_driver_template = { + .module = THIS_MODULE, + .name = "SBP-2 IEEE-1394", + .proc_name = SBP2_DEVICE_NAME, + .info = sbp2scsi_info, + .queuecommand = sbp2scsi_queuecommand, + .eh_abort_handler = sbp2scsi_abort, + .eh_device_reset_handler = sbp2scsi_reset, + .eh_bus_reset_handler = sbp2scsi_reset, + .eh_host_reset_handler = sbp2scsi_reset, + .slave_configure = sbp2scsi_slave_configure, + .this_id = -1, + .sg_tablesize = SG_ALL, + .use_clustering = ENABLE_CLUSTERING, + .cmd_per_lun = SBP2_MAX_CMDS, + .can_queue = SBP2_MAX_CMDS, + .emulated = 1, + .sdev_attrs = sbp2_sysfs_sdev_attrs, +}; + +static int sbp2_module_init(void) +{ + int ret; + + SBP2_DEBUG("sbp2_module_init"); + + printk(KERN_INFO "sbp2: %s\n", version); + + /* Module load debug option to force one command at a time (serializing I/O) */ + if (serialize_io) { + SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)"); + scsi_driver_template.can_queue = 1; + scsi_driver_template.cmd_per_lun = 1; + } + + /* Set max sectors (module load option). Default is 255 sectors. */ + scsi_driver_template.max_sectors = max_sectors; + + + /* Register our high level driver with 1394 stack */ + hpsb_register_highlevel(&sbp2_highlevel); + + ret = hpsb_register_protocol(&sbp2_driver); + if (ret) { + SBP2_ERR("Failed to register protocol"); + hpsb_unregister_highlevel(&sbp2_highlevel); + return ret; + } + + return 0; +} + +static void __exit sbp2_module_exit(void) +{ + SBP2_DEBUG("sbp2_module_exit"); + + hpsb_unregister_protocol(&sbp2_driver); + + hpsb_unregister_highlevel(&sbp2_highlevel); +} + +module_init(sbp2_module_init); +module_exit(sbp2_module_exit); |