diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/bfa/Makefile | 2 | ||||
| -rw-r--r-- | drivers/scsi/bfa/bfad.c | 12 | ||||
| -rw-r--r-- | drivers/scsi/bfa/bfad_debugfs.c | 547 | ||||
| -rw-r--r-- | drivers/scsi/bfa/bfad_drv.h | 12 |
4 files changed, 571 insertions, 2 deletions
diff --git a/drivers/scsi/bfa/Makefile b/drivers/scsi/bfa/Makefile index 17e06cae71b..ac3fdf02d5f 100644 --- a/drivers/scsi/bfa/Makefile +++ b/drivers/scsi/bfa/Makefile @@ -1,7 +1,7 @@ obj-$(CONFIG_SCSI_BFA_FC) := bfa.o bfa-y := bfad.o bfad_intr.o bfad_os.o bfad_im.o bfad_attr.o bfad_fwimg.o - +bfa-y += bfad_debugfs.o bfa-y += bfa_core.o bfa_ioc.o bfa_ioc_ct.o bfa_ioc_cb.o bfa_iocfc.o bfa_fcxp.o bfa-y += bfa_lps.o bfa_hw_cb.o bfa_hw_ct.o bfa_intr.o bfa_timer.o bfa_rport.o bfa-y += bfa_fcport.o bfa_port.o bfa_uf.o bfa_sgpg.o bfa_module.o bfa_ioim.o diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index a17800e6277..915a29d6c7a 100644 --- a/drivers/scsi/bfa/bfad.c +++ b/drivers/scsi/bfa/bfad.c @@ -57,6 +57,7 @@ static int ipfc_enable = BFA_FALSE; static int fdmi_enable = BFA_TRUE; int bfa_lun_queue_depth = BFAD_LUN_QUEUE_DEPTH; int bfa_linkup_delay = -1; +int bfa_debugfs_enable = 1; module_param(os_name, charp, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(os_name, "OS name of the hba host machine"); @@ -106,6 +107,9 @@ MODULE_PARM_DESC(bfa_linkup_delay, "Link up delay, default=30 secs for boot" module_param(fdmi_enable, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(fdmi_enable, "Enables fdmi registration, default=1," " Range[false:0|true:1]"); +module_param(bfa_debugfs_enable, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(bfa_debugfs_enable, "Enables debugfs feature, default=1," + " Range[false:0|true:1]"); /* * Stores the module parm num_sgpgs value; @@ -903,6 +907,10 @@ bfad_cfg_pport(struct bfad_s *bfad, enum bfa_port_role role) bfad->pport.roles |= BFA_PORT_ROLE_FCP_IM; } + /* Setup the debugfs node for this scsi_host */ + if (bfa_debugfs_enable) + bfad_debugfs_init(&bfad->pport); + bfad->bfad_flags |= BFAD_CFG_PPORT_DONE; out: @@ -912,6 +920,10 @@ out: void bfad_uncfg_pport(struct bfad_s *bfad) { + /* Remove the debugfs node for this scsi_host */ + kfree(bfad->regdata); + bfad_debugfs_exit(&bfad->pport); + if ((bfad->pport.roles & BFA_PORT_ROLE_FCP_IPFC) && ipfc_enable) { bfad_ipfc_port_delete(bfad, &bfad->pport); bfad->pport.roles &= ~BFA_PORT_ROLE_FCP_IPFC; diff --git a/drivers/scsi/bfa/bfad_debugfs.c b/drivers/scsi/bfa/bfad_debugfs.c new file mode 100644 index 00000000000..4b82f12aad6 --- /dev/null +++ b/drivers/scsi/bfa/bfad_debugfs.c @@ -0,0 +1,547 @@ +/* + * Copyright (c) 2005-2010 Brocade Communications Systems, Inc. + * All rights reserved + * www.brocade.com + * + * Linux driver for Brocade Fibre Channel Host Bus Adapter. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License (GPL) Version 2 as + * published by the Free Software Foundation + * + * 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. + */ + +#include <linux/debugfs.h> + +#include <bfad_drv.h> +#include <bfad_im.h> + +/* + * BFA debufs interface + * + * To access the interface, debugfs file system should be mounted + * if not already mounted using: + * mount -t debugfs none /sys/kernel/debug + * + * BFA Hierarchy: + * - bfa/host# + * where the host number corresponds to the one under /sys/class/scsi_host/host# + * + * Debugging service available per host: + * fwtrc: To collect current firmware trace. + * drvtrc: To collect current driver trace + * fwsave: To collect last saved fw trace as a result of firmware crash. + * regwr: To write one word to chip register + * regrd: To read one or more words from chip register. + */ + +struct bfad_debug_info { + char *debug_buffer; + void *i_private; + int buffer_len; +}; + +static int +bfad_debugfs_open_drvtrc(struct inode *inode, struct file *file) +{ + struct bfad_port_s *port = inode->i_private; + struct bfad_s *bfad = port->bfad; + struct bfad_debug_info *debug; + + debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); + if (!debug) + return -ENOMEM; + + debug->debug_buffer = (void *) bfad->trcmod; + debug->buffer_len = sizeof(struct bfa_trc_mod_s); + + file->private_data = debug; + + return 0; +} + +static int +bfad_debugfs_open_fwtrc(struct inode *inode, struct file *file) +{ + struct bfad_port_s *port = inode->i_private; + struct bfad_s *bfad = port->bfad; + struct bfad_debug_info *fw_debug; + unsigned long flags; + int rc; + + fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); + if (!fw_debug) + return -ENOMEM; + + fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s); + + fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len); + if (!fw_debug->debug_buffer) { + kfree(fw_debug); + printk(KERN_INFO "bfad[%d]: Failed to allocate fwtrc buffer\n", + bfad->inst_no); + return -ENOMEM; + } + + memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len); + + spin_lock_irqsave(&bfad->bfad_lock, flags); + rc = bfa_debug_fwtrc(&bfad->bfa, + fw_debug->debug_buffer, + &fw_debug->buffer_len); + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + if (rc != BFA_STATUS_OK) { + vfree(fw_debug->debug_buffer); + fw_debug->debug_buffer = NULL; + kfree(fw_debug); + printk(KERN_INFO "bfad[%d]: Failed to collect fwtrc\n", + bfad->inst_no); + return -ENOMEM; + } + + file->private_data = fw_debug; + + return 0; +} + +static int +bfad_debugfs_open_fwsave(struct inode *inode, struct file *file) +{ + struct bfad_port_s *port = inode->i_private; + struct bfad_s *bfad = port->bfad; + struct bfad_debug_info *fw_debug; + unsigned long flags; + int rc; + + fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); + if (!fw_debug) + return -ENOMEM; + + fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s); + + fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len); + if (!fw_debug->debug_buffer) { + kfree(fw_debug); + printk(KERN_INFO "bfad[%d]: Failed to allocate fwsave buffer\n", + bfad->inst_no); + return -ENOMEM; + } + + memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len); + + spin_lock_irqsave(&bfad->bfad_lock, flags); + rc = bfa_debug_fwsave(&bfad->bfa, + fw_debug->debug_buffer, + &fw_debug->buffer_len); + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + if (rc != BFA_STATUS_OK) { + vfree(fw_debug->debug_buffer); + fw_debug->debug_buffer = NULL; + kfree(fw_debug); + printk(KERN_INFO "bfad[%d]: Failed to collect fwsave\n", + bfad->inst_no); + return -ENOMEM; + } + + file->private_data = fw_debug; + + return 0; +} + +static int +bfad_debugfs_open_reg(struct inode *inode, struct file *file) +{ + struct bfad_debug_info *reg_debug; + + reg_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); + if (!reg_debug) + return -ENOMEM; + + reg_debug->i_private = inode->i_private; + + file->private_data = reg_debug; + + return 0; +} + +/* Changes the current file position */ +static loff_t +bfad_debugfs_lseek(struct file *file, loff_t offset, int orig) +{ + struct bfad_debug_info *debug; + loff_t pos = file->f_pos; + + debug = file->private_data; + + switch (orig) { + case 0: + file->f_pos = offset; + break; + case 1: + file->f_pos += offset; + break; + case 2: + file->f_pos = debug->buffer_len - offset; + break; + default: + return -EINVAL; + } + + if (file->f_pos < 0 || file->f_pos > debug->buffer_len) { + file->f_pos = pos; + return -EINVAL; + } + + return file->f_pos; +} + +static ssize_t +bfad_debugfs_read(struct file *file, char __user *buf, + size_t nbytes, loff_t *pos) +{ + struct bfad_debug_info *debug = file->private_data; + + if (!debug || !debug->debug_buffer) + return 0; + + return memory_read_from_buffer(buf, nbytes, pos, + debug->debug_buffer, debug->buffer_len); +} + +#define BFA_REG_CT_ADDRSZ (0x40000) +#define BFA_REG_CB_ADDRSZ (0x20000) +#define BFA_REG_ADDRSZ(__bfa) \ + ((bfa_ioc_devid(&(__bfa)->ioc) == BFA_PCI_DEVICE_ID_CT) ? \ + BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ) +#define BFA_REG_ADDRMSK(__bfa) ((uint32_t)(BFA_REG_ADDRSZ(__bfa) - 1)) + +static bfa_status_t +bfad_reg_offset_check(struct bfa_s *bfa, u32 offset, u32 len) +{ + u8 area; + + /* check [16:15] */ + area = (offset >> 15) & 0x7; + if (area == 0) { + /* PCIe core register */ + if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */ + return BFA_STATUS_EINVAL; + } else if (area == 0x1) { + /* CB 32 KB memory page */ + if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */ + return BFA_STATUS_EINVAL; + } else { + /* CB register space 64KB */ + if ((offset + (len<<2)) > BFA_REG_ADDRMSK(bfa)) + return BFA_STATUS_EINVAL; + } + return BFA_STATUS_OK; +} + +static ssize_t +bfad_debugfs_read_regrd(struct file *file, char __user *buf, + size_t nbytes, loff_t *pos) +{ + struct bfad_debug_info *regrd_debug = file->private_data; + struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private; + struct bfad_s *bfad = port->bfad; + ssize_t rc; + + if (!bfad->regdata) + return 0; + + rc = memory_read_from_buffer(buf, nbytes, pos, + bfad->regdata, bfad->reglen); + + if ((*pos + nbytes) >= bfad->reglen) { + kfree(bfad->regdata); + bfad->regdata = NULL; + bfad->reglen = 0; + } + + return rc; +} + +static ssize_t +bfad_debugfs_write_regrd(struct file *file, const char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct bfad_debug_info *regrd_debug = file->private_data; + struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private; + struct bfad_s *bfad = port->bfad; + struct bfa_s *bfa = &bfad->bfa; + struct bfa_ioc_s *ioc = &bfa->ioc; + int addr, len, rc, i; + u32 *regbuf; + void __iomem *rb, *reg_addr; + unsigned long flags; + + rc = sscanf(buf, "%x:%x", &addr, &len); + if (rc < 2) { + printk(KERN_INFO + "bfad[%d]: %s failed to read user buf\n", + bfad->inst_no, __func__); + return -EINVAL; + } + + kfree(bfad->regdata); + bfad->regdata = NULL; + bfad->reglen = 0; + + bfad->regdata = kzalloc(len << 2, GFP_KERNEL); + if (!bfad->regdata) { + printk(KERN_INFO "bfad[%d]: Failed to allocate regrd buffer\n", + bfad->inst_no); + return -ENOMEM; + } + + bfad->reglen = len << 2; + rb = bfa_ioc_bar0(ioc); + addr &= BFA_REG_ADDRMSK(bfa); + + /* offset and len sanity check */ + rc = bfad_reg_offset_check(bfa, addr, len); + if (rc) { + printk(KERN_INFO "bfad[%d]: Failed reg offset check\n", + bfad->inst_no); + kfree(bfad->regdata); + bfad->regdata = NULL; + bfad->reglen = 0; + return -EINVAL; + } + + reg_addr = rb + addr; + regbuf = (u32 *)bfad->regdata; + spin_lock_irqsave(&bfad->bfad_lock, flags); + for (i = 0; i < len; i++) { + *regbuf = bfa_reg_read(reg_addr); + regbuf++; + reg_addr += sizeof(u32); + } + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + + return nbytes; +} + +static ssize_t +bfad_debugfs_write_regwr(struct file *file, const char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct bfad_debug_info *debug = file->private_data; + struct bfad_port_s *port = (struct bfad_port_s *)debug->i_private; + struct bfad_s *bfad = port->bfad; + struct bfa_s *bfa = &bfad->bfa; + struct bfa_ioc_s *ioc = &bfa->ioc; + int addr, val, rc; + void __iomem *reg_addr; + unsigned long flags; + + rc = sscanf(buf, "%x:%x", &addr, &val); + if (rc < 2) { + printk(KERN_INFO + "bfad[%d]: %s failed to read user buf\n", + bfad->inst_no, __func__); + return -EINVAL; + } + + addr &= BFA_REG_ADDRMSK(bfa); /* offset only 17 bit and word align */ + + /* offset and len sanity check */ + rc = bfad_reg_offset_check(bfa, addr, 1); + if (rc) { + printk(KERN_INFO + "bfad[%d]: Failed reg offset check\n", + bfad->inst_no); + return -EINVAL; + } + + reg_addr = (uint32_t *) ((uint8_t *) bfa_ioc_bar0(ioc) + addr); + spin_lock_irqsave(&bfad->bfad_lock, flags); + bfa_reg_write(reg_addr, val); + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + + return nbytes; +} + +static int +bfad_debugfs_release(struct inode *inode, struct file *file) +{ + struct bfad_debug_info *debug = file->private_data; + + if (!debug) + return 0; + + file->private_data = NULL; + kfree(debug); + return 0; +} + +static int +bfad_debugfs_release_fwtrc(struct inode *inode, struct file *file) +{ + struct bfad_debug_info *fw_debug = file->private_data; + + if (!fw_debug) + return 0; + + if (fw_debug->debug_buffer) + vfree(fw_debug->debug_buffer); + + file->private_data = NULL; + kfree(fw_debug); + return 0; +} + +static const struct file_operations bfad_debugfs_op_drvtrc = { + .owner = THIS_MODULE, + .open = bfad_debugfs_open_drvtrc, + .llseek = bfad_debugfs_lseek, + .read = bfad_debugfs_read, + .release = bfad_debugfs_release, +}; + +static const struct file_operations bfad_debugfs_op_fwtrc = { + .owner = THIS_MODULE, + .open = bfad_debugfs_open_fwtrc, + .llseek = bfad_debugfs_lseek, + .read = bfad_debugfs_read, + .release = bfad_debugfs_release_fwtrc, +}; + +static const struct file_operations bfad_debugfs_op_fwsave = { + .owner = THIS_MODULE, + .open = bfad_debugfs_open_fwsave, + .llseek = bfad_debugfs_lseek, + .read = bfad_debugfs_read, + .release = bfad_debugfs_release_fwtrc, +}; + +static const struct file_operations bfad_debugfs_op_regrd = { + .owner = THIS_MODULE, + .open = bfad_debugfs_open_reg, + .llseek = bfad_debugfs_lseek, + .read = bfad_debugfs_read_regrd, + .write = bfad_debugfs_write_regrd, + .release = bfad_debugfs_release, +}; + +static const struct file_operations bfad_debugfs_op_regwr = { + .owner = THIS_MODULE, + .open = bfad_debugfs_open_reg, + .llseek = bfad_debugfs_lseek, + .write = bfad_debugfs_write_regwr, + .release = bfad_debugfs_release, +}; + +struct bfad_debugfs_entry { + const char *name; + mode_t mode; + const struct file_operations *fops; +}; + +static const struct bfad_debugfs_entry bfad_debugfs_files[] = { + { "drvtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_drvtrc, }, + { "fwtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwtrc, }, + { "fwsave", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwsave, }, + { "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bfad_debugfs_op_regrd, }, + { "regwr", S_IFREG|S_IWUSR, &bfad_debugfs_op_regwr, }, +}; + +static struct dentry *bfa_debugfs_root; +static atomic_t bfa_debugfs_port_count; + +inline void +bfad_debugfs_init(struct bfad_port_s *port) +{ + struct bfad_im_port_s *im_port = port->im_port; + struct bfad_s *bfad = im_port->bfad; + struct Scsi_Host *shost = im_port->shost; + const struct bfad_debugfs_entry *file; + char name[16]; + int i; + + if (!bfa_debugfs_enable) + return; + + /* Setup the BFA debugfs root directory*/ + if (!bfa_debugfs_root) { + bfa_debugfs_root = debugfs_create_dir("bfa", NULL); + atomic_set(&bfa_debugfs_port_count, 0); + if (!bfa_debugfs_root) { + printk(KERN_WARNING + "BFA debugfs root dir creation failed\n"); + goto err; + } + } + + /* + * Setup the host# directory for the port, + * corresponds to the scsi_host num of this port. + */ + snprintf(name, sizeof(name), "host%d", shost->host_no); + if (!port->port_debugfs_root) { + port->port_debugfs_root = + debugfs_create_dir(name, bfa_debugfs_root); + if (!port->port_debugfs_root) { + printk(KERN_WARNING + "BFA host root dir creation failed\n"); + goto err; + } + + atomic_inc(&bfa_debugfs_port_count); + + for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) { + file = &bfad_debugfs_files[i]; + bfad->bfad_dentry_files[i] = + debugfs_create_file(file->name, + file->mode, + port->port_debugfs_root, + port, + file->fops); + if (!bfad->bfad_dentry_files[i]) { + printk(KERN_WARNING + "BFA host%d: create %s entry failed\n", + shost->host_no, file->name); + goto err; + } + } + } + +err: + return; +} + +inline void +bfad_debugfs_exit(struct bfad_port_s *port) +{ + struct bfad_im_port_s *im_port = port->im_port; + struct bfad_s *bfad = im_port->bfad; + int i; + + for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) { + if (bfad->bfad_dentry_files[i]) { + debugfs_remove(bfad->bfad_dentry_files[i]); + bfad->bfad_dentry_files[i] = NULL; + } + } + + /* + * Remove the host# directory for the port, + * corresponds to the scsi_host num of this port. + */ + if (port->port_debugfs_root) { + debugfs_remove(port->port_debugfs_root); + port->port_debugfs_root = NULL; + atomic_dec(&bfa_debugfs_port_count); + } + + /* Remove the BFA debugfs root directory */ + if (atomic_read(&bfa_debugfs_port_count) == 0) { + debugfs_remove(bfa_debugfs_root); + bfa_debugfs_root = NULL; + } +} diff --git a/drivers/scsi/bfa/bfad_drv.h b/drivers/scsi/bfa/bfad_drv.h index fb6ac1d3fd1..465b8b86ec9 100644 --- a/drivers/scsi/bfa/bfad_drv.h +++ b/drivers/scsi/bfa/bfad_drv.h @@ -111,6 +111,9 @@ struct bfad_port_s { struct bfad_im_port_s *im_port; /* IM specific data */ struct bfad_tm_port_s *tm_port; /* TM specific data */ struct bfad_ipfc_port_s *ipfc_port; /* IPFC specific data */ + + /* port debugfs specific data */ + struct dentry *port_debugfs_root; }; /* @@ -186,6 +189,10 @@ struct bfad_s { struct fc_host_statistics link_stats; struct list_head pbc_pcfg_list; atomic_t wq_reqcnt; + /* debugfs specific data */ + char *regdata; + u32 reglen; + struct dentry *bfad_dentry_files[5]; }; struct bfad_pcfg_s { @@ -276,7 +283,9 @@ void bfad_drv_uninit(struct bfad_s *bfad); void bfad_drv_log_level_set(struct bfad_s *bfad); bfa_status_t bfad_fc4_module_init(void); void bfad_fc4_module_exit(void); -int bfad_worker (void *ptr); +int bfad_worker(void *ptr); +void bfad_debugfs_init(struct bfad_port_s *port); +void bfad_debugfs_exit(struct bfad_port_s *port); void bfad_pci_remove(struct pci_dev *pdev); int bfad_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid); @@ -289,6 +298,7 @@ extern struct list_head bfad_list; extern int bfa_lun_queue_depth; extern int bfad_supported_fc4s; extern int bfa_linkup_delay; +extern int bfa_debugfs_enable; extern struct mutex bfad_mutex; #endif /* __BFAD_DRV_H__ */ |