From 858c9f6c19c6f9bf86cbbc64ce0d17c61d6131b8 Mon Sep 17 00:00:00 2001 From: James Smart Date: Sun, 17 Jun 2007 19:56:39 -0500 Subject: [SCSI] lpfc: bug fixes Following the NPIV support, the following changes have been accumulated in the testing and qualification of the driver: - Fix affinity of ELS ring to slow/deferred event processing - Fix Ring attention masks - Defer dev_loss_tmo timeout handling to worker thread - Consolidate link down error classification for better error checking - Remove unused/deprecated nlp_initiator_tmr timer - Fix for async scan - move adapter init code back into pci_probe_one context. Fix async scan interfaces. - Expand validation of ability to create vports - Extract VPI resource cnt from firmware - Tuning of Login/Reject policies to better deal with overwhelmned targets - Misc ELS and discovery fixes - Export the npiv_enable attribute to sysfs - Mailbox handling fix - Add debugfs support - A few other small misc fixes: - wrong return values, double-frees, bad locking - Added adapter failure heartbeat Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_debugfs.c | 508 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 508 insertions(+) create mode 100644 drivers/scsi/lpfc/lpfc_debugfs.c (limited to 'drivers/scsi/lpfc/lpfc_debugfs.c') diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c new file mode 100644 index 000000000000..673cfe11cc2b --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_debugfs.c @@ -0,0 +1,508 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Fibre Channel Host Bus Adapters. * + * Copyright (C) 2007 Emulex. All rights reserved. * + * EMULEX and SLI are trademarks of Emulex. * + * www.emulex.com * + * * + * This program is free software; you can redistribute it and/or * + * modify it under the terms of version 2 of the GNU General * + * Public License as published by the Free Software Foundation. * + * This program is distributed in the hope that it will be useful. * + * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * + * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * + * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * + * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * + * TO BE LEGALLY INVALID. See the GNU General Public License for * + * more details, a copy of which can be found in the file COPYING * + * included with this package. * + *******************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "lpfc_hw.h" +#include "lpfc_sli.h" +#include "lpfc_disc.h" +#include "lpfc_scsi.h" +#include "lpfc.h" +#include "lpfc_logmsg.h" +#include "lpfc_crtn.h" +#include "lpfc_vport.h" +#include "lpfc_version.h" +#include "lpfc_vport.h" +#include "lpfc_debugfs.h" + +#ifdef CONFIG_LPFC_DEBUG_FS +/* debugfs interface + * + * To access this interface the user should: + * # mkdir /debug + * # mount -t debugfs none /debug + * + * The lpfc debugfs directory hierachy is: + * lpfc/lpfcX/vportY + * where X is the lpfc hba unique_id + * where Y is the vport VPI on that hba + * + * Debugging services available per vport: + * discovery_trace + * This is an ACSII readable file that contains a trace of the last + * lpfc_debugfs_max_disc_trc events that happened on a specific vport. + * See lpfc_debugfs.h for different categories of + * discovery events. To enable the discovery trace, the following + * module parameters must be set: + * lpfc_debugfs_enable=1 Turns on lpfc debugfs filesystem support + * lpfc_debugfs_max_disc_trc=X Where X is the event trace depth for + * EACH vport. X MUST also be a power of 2. + * lpfc_debugfs_mask_disc_trc=Y Where Y is an event mask as defined in + * lpfc_debugfs.h . + */ +static int lpfc_debugfs_enable = 0; +module_param(lpfc_debugfs_enable, int, 0); +MODULE_PARM_DESC(lpfc_debugfs_enable, "Enable debugfs services"); + +static int lpfc_debugfs_max_disc_trc = 0; /* This MUST be a power of 2 */ +module_param(lpfc_debugfs_max_disc_trc, int, 0); +MODULE_PARM_DESC(lpfc_debugfs_max_disc_trc, + "Set debugfs discovery trace depth"); + +static int lpfc_debugfs_mask_disc_trc = 0; +module_param(lpfc_debugfs_mask_disc_trc, int, 0); +MODULE_PARM_DESC(lpfc_debugfs_mask_disc_trc, + "Set debugfs discovery trace mask"); + +#include + +/* size of discovery_trace output line */ +#define LPFC_DISC_TRC_ENTRY_SIZE 80 + +/* nodelist output buffer size */ +#define LPFC_NODELIST_SIZE 8192 +#define LPFC_NODELIST_ENTRY_SIZE 120 + +struct lpfc_debug { + char *buffer; + int len; +}; + +atomic_t lpfc_debugfs_disc_trc_cnt = ATOMIC_INIT(0); +unsigned long lpfc_debugfs_start_time = 0L; + +static int +lpfc_debugfs_disc_trc_data(struct lpfc_vport *vport, char *buf, int size) +{ + int i, index, len, enable; + uint32_t ms; + struct lpfc_disc_trc *dtp; + char buffer[80]; + + + enable = lpfc_debugfs_enable; + lpfc_debugfs_enable = 0; + + len = 0; + index = (atomic_read(&vport->disc_trc_cnt) + 1) & + (lpfc_debugfs_max_disc_trc - 1); + for (i = index; i < lpfc_debugfs_max_disc_trc; i++) { + dtp = vport->disc_trc + i; + if (!dtp->fmt) + continue; + ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); + snprintf(buffer, 80, "%010d:%010d ms:%s\n", + dtp->seq_cnt, ms, dtp->fmt); + len += snprintf(buf+len, size-len, buffer, + dtp->data1, dtp->data2, dtp->data3); + } + for (i = 0; i < index; i++) { + dtp = vport->disc_trc + i; + if (!dtp->fmt) + continue; + ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); + snprintf(buffer, 80, "%010d:%010d ms:%s\n", + dtp->seq_cnt, ms, dtp->fmt); + len += snprintf(buf+len, size-len, buffer, + dtp->data1, dtp->data2, dtp->data3); + } + + lpfc_debugfs_enable = enable; + return len; +} + +static int +lpfc_debugfs_nodelist_data(struct lpfc_vport *vport, char *buf, int size) +{ + int len = 0; + int cnt; + struct Scsi_Host *shost = lpfc_shost_from_vport(vport); + struct lpfc_nodelist *ndlp; + unsigned char *statep, *name; + + cnt = (LPFC_NODELIST_SIZE / LPFC_NODELIST_ENTRY_SIZE); + + spin_lock_irq(shost->host_lock); + list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { + if (!cnt) { + len += snprintf(buf+len, size-len, + "Missing Nodelist Entries\n"); + break; + } + cnt--; + switch (ndlp->nlp_state) { + case NLP_STE_UNUSED_NODE: + statep = "UNUSED"; + break; + case NLP_STE_PLOGI_ISSUE: + statep = "PLOGI "; + break; + case NLP_STE_ADISC_ISSUE: + statep = "ADISC "; + break; + case NLP_STE_REG_LOGIN_ISSUE: + statep = "REGLOG"; + break; + case NLP_STE_PRLI_ISSUE: + statep = "PRLI "; + break; + case NLP_STE_UNMAPPED_NODE: + statep = "UNMAP "; + break; + case NLP_STE_MAPPED_NODE: + statep = "MAPPED"; + break; + case NLP_STE_NPR_NODE: + statep = "NPR "; + break; + default: + statep = "UNKNOWN"; + } + len += snprintf(buf+len, size-len, "%s DID:x%06x ", + statep, ndlp->nlp_DID); + name = (unsigned char *)&ndlp->nlp_portname; + len += snprintf(buf+len, size-len, + "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ", + *name, *(name+1), *(name+2), *(name+3), + *(name+4), *(name+5), *(name+6), *(name+7)); + name = (unsigned char *)&ndlp->nlp_nodename; + len += snprintf(buf+len, size-len, + "WWNN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ", + *name, *(name+1), *(name+2), *(name+3), + *(name+4), *(name+5), *(name+6), *(name+7)); + len += snprintf(buf+len, size-len, "RPI:%03d flag:x%08x ", + ndlp->nlp_rpi, ndlp->nlp_flag); + if (!ndlp->nlp_type) + len += snprintf(buf+len, size-len, "UNKNOWN_TYPE"); + if (ndlp->nlp_type & NLP_FC_NODE) + len += snprintf(buf+len, size-len, "FC_NODE "); + if (ndlp->nlp_type & NLP_FABRIC) + len += snprintf(buf+len, size-len, "FABRIC "); + if (ndlp->nlp_type & NLP_FCP_TARGET) + len += snprintf(buf+len, size-len, "FCP_TGT sid:%d ", + ndlp->nlp_sid); + if (ndlp->nlp_type & NLP_FCP_INITIATOR) + len += snprintf(buf+len, size-len, "FCP_INITIATOR"); + len += snprintf(buf+len, size-len, "\n"); + } + spin_unlock_irq(shost->host_lock); + return len; +} +#endif + + +inline void +lpfc_debugfs_disc_trc(struct lpfc_vport *vport, int mask, char *fmt, + uint32_t data1, uint32_t data2, uint32_t data3) +{ +#ifdef CONFIG_LPFC_DEBUG_FS + struct lpfc_disc_trc *dtp; + int index; + + if (!(lpfc_debugfs_mask_disc_trc & mask)) + return; + + if (!lpfc_debugfs_enable || !lpfc_debugfs_max_disc_trc || + !vport || !vport->disc_trc) + return; + + index = atomic_inc_return(&vport->disc_trc_cnt) & + (lpfc_debugfs_max_disc_trc - 1); + dtp = vport->disc_trc + index; + dtp->fmt = fmt; + dtp->data1 = data1; + dtp->data2 = data2; + dtp->data3 = data3; + dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_disc_trc_cnt); + dtp->jif = jiffies; +#endif + return; +} + +#ifdef CONFIG_LPFC_DEBUG_FS +static int +lpfc_debugfs_disc_trc_open(struct inode *inode, struct file *file) +{ + struct lpfc_vport *vport = inode->i_private; + struct lpfc_debug *debug; + int size; + int rc = -ENOMEM; + + if (!lpfc_debugfs_max_disc_trc) { + rc = -ENOSPC; + goto out; + } + + debug = kmalloc(sizeof(*debug), GFP_KERNEL); + if (!debug) + goto out; + + /* Round to page boundry */ + size = (lpfc_debugfs_max_disc_trc * LPFC_DISC_TRC_ENTRY_SIZE); + size = PAGE_ALIGN(size); + + debug->buffer = kmalloc(size, GFP_KERNEL); + if (!debug->buffer) { + kfree(debug); + goto out; + } + + debug->len = lpfc_debugfs_disc_trc_data(vport, debug->buffer, size); + file->private_data = debug; + + rc = 0; +out: + return rc; +} + +static int +lpfc_debugfs_nodelist_open(struct inode *inode, struct file *file) +{ + struct lpfc_vport *vport = inode->i_private; + struct lpfc_debug *debug; + int rc = -ENOMEM; + + debug = kmalloc(sizeof(*debug), GFP_KERNEL); + if (!debug) + goto out; + + /* Round to page boundry */ + debug->buffer = kmalloc(LPFC_NODELIST_SIZE, GFP_KERNEL); + if (!debug->buffer) { + kfree(debug); + goto out; + } + + debug->len = lpfc_debugfs_nodelist_data(vport, debug->buffer, + LPFC_NODELIST_SIZE); + file->private_data = debug; + + rc = 0; +out: + return rc; +} + +static loff_t +lpfc_debugfs_lseek(struct file *file, loff_t off, int whence) +{ + struct lpfc_debug *debug; + loff_t pos = -1; + + debug = file->private_data; + + switch (whence) { + case 0: + pos = off; + break; + case 1: + pos = file->f_pos + off; + break; + case 2: + pos = debug->len - off; + } + return (pos < 0 || pos > debug->len) ? -EINVAL : (file->f_pos = pos); +} + +static ssize_t +lpfc_debugfs_read(struct file *file, char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct lpfc_debug *debug = file->private_data; + return simple_read_from_buffer(buf, nbytes, ppos, debug->buffer, + debug->len); +} + +static int +lpfc_debugfs_release(struct inode *inode, struct file *file) +{ + struct lpfc_debug *debug = file->private_data; + + kfree(debug->buffer); + kfree(debug); + + return 0; +} + +#undef lpfc_debugfs_op_disc_trc +static struct file_operations lpfc_debugfs_op_disc_trc = { + .owner = THIS_MODULE, + .open = lpfc_debugfs_disc_trc_open, + .llseek = lpfc_debugfs_lseek, + .read = lpfc_debugfs_read, + .release = lpfc_debugfs_release, +}; + +#undef lpfc_debugfs_op_nodelist +static struct file_operations lpfc_debugfs_op_nodelist = { + .owner = THIS_MODULE, + .open = lpfc_debugfs_nodelist_open, + .llseek = lpfc_debugfs_lseek, + .read = lpfc_debugfs_read, + .release = lpfc_debugfs_release, +}; + +static struct dentry *lpfc_debugfs_root = NULL; +static atomic_t lpfc_debugfs_hba_count; +#endif + +inline void +lpfc_debugfs_initialize(struct lpfc_vport *vport) +{ +#ifdef CONFIG_LPFC_DEBUG_FS + struct lpfc_hba *phba = vport->phba; + char name[64]; + uint32_t num, i; + + if (!lpfc_debugfs_enable) + return; + + if (lpfc_debugfs_max_disc_trc) { + num = lpfc_debugfs_max_disc_trc - 1; + if (num & lpfc_debugfs_max_disc_trc) { + /* Change to be a power of 2 */ + num = lpfc_debugfs_max_disc_trc; + i = 0; + while (num > 1) { + num = num >> 1; + i++; + } + lpfc_debugfs_max_disc_trc = (1 << i); + printk(KERN_ERR + "lpfc_debugfs_max_disc_trc changed to %d\n", + lpfc_debugfs_max_disc_trc); + } + } + + if (!lpfc_debugfs_root) { + lpfc_debugfs_root = debugfs_create_dir("lpfc", NULL); + atomic_set(&lpfc_debugfs_hba_count, 0); + if (!lpfc_debugfs_root) + goto debug_failed; + } + + snprintf(name, sizeof(name), "lpfc%d", phba->brd_no); + if (!phba->hba_debugfs_root) { + phba->hba_debugfs_root = + debugfs_create_dir(name, lpfc_debugfs_root); + if (!phba->hba_debugfs_root) + goto debug_failed; + atomic_inc(&lpfc_debugfs_hba_count); + atomic_set(&phba->debugfs_vport_count, 0); + } + + snprintf(name, sizeof(name), "vport%d", vport->vpi); + if (!vport->vport_debugfs_root) { + vport->vport_debugfs_root = + debugfs_create_dir(name, phba->hba_debugfs_root); + if (!vport->vport_debugfs_root) + goto debug_failed; + atomic_inc(&phba->debugfs_vport_count); + } + + if (!lpfc_debugfs_start_time) + lpfc_debugfs_start_time = jiffies; + + vport->disc_trc = kmalloc( + (sizeof(struct lpfc_disc_trc) * lpfc_debugfs_max_disc_trc), + GFP_KERNEL); + + if (!vport->disc_trc) + goto debug_failed; + memset(vport->disc_trc, 0, + (sizeof(struct lpfc_disc_trc) * lpfc_debugfs_max_disc_trc)); + + snprintf(name, sizeof(name), "discovery_trace"); + vport->debug_disc_trc = + debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, + vport->vport_debugfs_root, + vport, &lpfc_debugfs_op_disc_trc); + if (!vport->debug_disc_trc) { + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "%d:0409 Cannot create debugfs", + phba->brd_no); + goto debug_failed; + } + snprintf(name, sizeof(name), "nodelist"); + vport->debug_nodelist = + debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, + vport->vport_debugfs_root, + vport, &lpfc_debugfs_op_nodelist); + if (!vport->debug_nodelist) { + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "%d:0409 Cannot create debugfs", + phba->brd_no); + goto debug_failed; + } +debug_failed: + return; +#endif +} + + +inline void +lpfc_debugfs_terminate(struct lpfc_vport *vport) +{ +#ifdef CONFIG_LPFC_DEBUG_FS + struct lpfc_hba *phba = vport->phba; + + if (vport->disc_trc) { + kfree(vport->disc_trc); + vport->disc_trc = NULL; + } + if (vport->debug_disc_trc) { + debugfs_remove(vport->debug_disc_trc); /* discovery_trace */ + vport->debug_disc_trc = NULL; + } + if (vport->debug_nodelist) { + debugfs_remove(vport->debug_nodelist); /* nodelist */ + vport->debug_nodelist = NULL; + } + if (vport->vport_debugfs_root) { + debugfs_remove(vport->vport_debugfs_root); /* vportX */ + vport->vport_debugfs_root = NULL; + atomic_dec(&phba->debugfs_vport_count); + } + if (atomic_read(&phba->debugfs_vport_count) == 0) { + debugfs_remove(vport->phba->hba_debugfs_root); /* lpfcX */ + vport->phba->hba_debugfs_root = NULL; + atomic_dec(&lpfc_debugfs_hba_count); + if (atomic_read(&lpfc_debugfs_hba_count) == 0) { + debugfs_remove(lpfc_debugfs_root); /* lpfc */ + lpfc_debugfs_root = NULL; + } + } +#endif +} + + -- cgit v1.2.3-55-g7522