/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2007-2008 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 "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_nl.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_compat.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 hierarchy 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 . * * slow_ring_trace * This is an ACSII readable file that contains a trace of the last * lpfc_debugfs_max_slow_ring_trc events that happened on a specific HBA. * To enable the slow ring trace, the following module parameters must be set: * lpfc_debugfs_enable=1 Turns on lpfc debugfs filesystem support * lpfc_debugfs_max_slow_ring_trc=X Where X is the event trace depth for * the HBA. X MUST also be a power of 2. */ static int lpfc_debugfs_enable = 1; module_param(lpfc_debugfs_enable, int, 0); MODULE_PARM_DESC(lpfc_debugfs_enable, "Enable debugfs services"); /* This MUST be a power of 2 */ static int lpfc_debugfs_max_disc_trc; module_param(lpfc_debugfs_max_disc_trc, int, 0); MODULE_PARM_DESC(lpfc_debugfs_max_disc_trc, "Set debugfs discovery trace depth"); /* This MUST be a power of 2 */ static int lpfc_debugfs_max_slow_ring_trc; module_param(lpfc_debugfs_max_slow_ring_trc, int, 0); MODULE_PARM_DESC(lpfc_debugfs_max_slow_ring_trc, "Set debugfs slow ring trace depth"); int lpfc_debugfs_mask_disc_trc; 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 output line, for discovery_trace and slow_ring_trace */ #define LPFC_DEBUG_TRC_ENTRY_SIZE 100 /* nodelist output buffer size */ #define LPFC_NODELIST_SIZE 8192 #define LPFC_NODELIST_ENTRY_SIZE 120 /* dumpHBASlim output buffer size */ #define LPFC_DUMPHBASLIM_SIZE 4096 /* dumpHostSlim output buffer size */ #define LPFC_DUMPHOSTSLIM_SIZE 4096 /* hbqinfo output buffer size */ #define LPFC_HBQINFO_SIZE 8192 struct lpfc_debug { char *buffer; int len; }; static atomic_t lpfc_debugfs_seq_trc_cnt = ATOMIC_INIT(0); static unsigned long lpfc_debugfs_start_time = 0L; /** * lpfc_debugfs_disc_trc_data - Dump discovery logging to a buffer. * @vport: The vport to gather the log info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine gathers the lpfc discovery debugfs data from the @vport and * dumps it to @buf up to @size number of bytes. It will start at the next entry * in the log and process the log until the end of the buffer. Then it will * gather from the beginning of the log and process until the current entry. * * Notes: * Discovery logging will be disabled while while this routine dumps the log. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ 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_debugfs_trc *dtp; char buffer[LPFC_DEBUG_TRC_ENTRY_SIZE]; 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, LPFC_DEBUG_TRC_ENTRY_SIZE, "%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, LPFC_DEBUG_TRC_ENTRY_SIZE, "%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; } /** * lpfc_debugfs_slow_ring_trc_data - Dump slow ring logging to a buffer. * @phba: The HBA to gather the log info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine gathers the lpfc slow ring debugfs data from the @phba and * dumps it to @buf up to @size number of bytes. It will start at the next entry * in the log and process the log until the end of the buffer. Then it will * gather from the beginning of the log and process until the current entry. * * Notes: * Slow ring logging will be disabled while while this routine dumps the log. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ static int lpfc_debugfs_slow_ring_trc_data(struct lpfc_hba *phba, char *buf, int size) { int i, index, len, enable; uint32_t ms; struct lpfc_debugfs_trc *dtp; char buffer[LPFC_DEBUG_TRC_ENTRY_SIZE]; enable = lpfc_debugfs_enable; lpfc_debugfs_enable = 0; len = 0; index = (atomic_read(&phba->slow_ring_trc_cnt) + 1) & (lpfc_debugfs_max_slow_ring_trc - 1); for (i = index; i < lpfc_debugfs_max_slow_ring_trc; i++) { dtp = phba->slow_ring_trc + i; if (!dtp->fmt) continue; ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); snprintf(buffer, LPFC_DEBUG_TRC_ENTRY_SIZE, "%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 = phba->slow_ring_trc + i; if (!dtp->fmt) continue; ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); snprintf(buffer, LPFC_DEBUG_TRC_ENTRY_SIZE, "%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_last_hbq = -1; /** * lpfc_debugfs_hbqinfo_data - Dump host buffer queue info to a buffer. * @phba: The HBA to gather host buffer info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine dumps the host buffer queue info from the @phba to @buf up to * @size number of bytes. A header that describes the current hbq state will be * dumped to @buf first and then info on each hbq entry will be dumped to @buf * until @size bytes have been dumped or all the hbq info has been dumped. * * Notes: * This routine will rotate through each configured HBQ each time called. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ static int lpfc_debugfs_hbqinfo_data(struct lpfc_hba *phba, char *buf, int size) { int len = 0; int cnt, i, j, found, posted, low; uint32_t phys, raw_index, getidx; struct lpfc_hbq_init *hip; struct hbq_s *hbqs; struct lpfc_hbq_entry *hbqe; struct lpfc_dmabuf *d_buf; struct hbq_dmabuf *hbq_buf; cnt = LPFC_HBQINFO_SIZE; spin_lock_irq(&phba->hbalock); /* toggle between multiple hbqs, if any */ i = lpfc_sli_hbq_count(); if (i > 1) { lpfc_debugfs_last_hbq++; if (lpfc_debugfs_last_hbq >= i) lpfc_debugfs_last_hbq = 0; } else lpfc_debugfs_last_hbq = 0; i = lpfc_debugfs_last_hbq; len += snprintf(buf+len, size-len, "HBQ %d Info\n", i); hbqs = &phba->hbqs[i]; posted = 0; list_for_each_entry(d_buf, &hbqs->hbq_buffer_list, list) posted++; hip = lpfc_hbq_defs[i]; len += snprintf(buf+len, size-len, "idx:%d prof:%d rn:%d bufcnt:%d icnt:%d acnt:%d posted %d\n", hip->hbq_index, hip->profile, hip->rn, hip->buffer_count, hip->init_count, hip->add_count, posted); raw_index = phba->hbq_get[i]; getidx = le32_to_cpu(raw_index); len += snprintf(buf+len, size-len, "entrys:%d bufcnt:%d Put:%d nPut:%d localGet:%d hbaGet:%d\n", hbqs->entry_count, hbqs->buffer_count, hbqs->hbqPutIdx, hbqs->next_hbqPutIdx, hbqs->local_hbqGetIdx, getidx); hbqe = (struct lpfc_hbq_entry *) phba->hbqs[i].hbq_virt; for (j=0; jentry_count; j++) { len += snprintf(buf+len, size-len, "%03d: %08x %04x %05x ", j, le32_to_cpu(hbqe->bde.addrLow), le32_to_cpu(hbqe->bde.tus.w), le32_to_cpu(hbqe->buffer_tag)); i = 0; found = 0; /* First calculate if slot has an associated posted buffer */ low = hbqs->hbqPutIdx - posted; if (low >= 0) { if ((j >= hbqs->hbqPutIdx) || (j < low)) { len += snprintf(buf+len, size-len, "Unused\n"); goto skipit; } } else { if ((j >= hbqs->hbqPutIdx) && (j < (hbqs->entry_count+low))) { len += snprintf(buf+len, size-len, "Unused\n"); goto skipit; } } /* Get the Buffer info for the posted buffer */ list_for_each_entry(d_buf, &hbqs->hbq_buffer_list, list) { hbq_buf = container_of(d_buf, struct hbq_dmabuf, dbuf); phys = ((uint64_t)hbq_buf->dbuf.phys & 0xffffffff); if (phys == le32_to_cpu(hbqe->bde.addrLow)) { len += snprintf(buf+len, size-len, "Buf%d: %p %06x\n", i, hbq_buf->dbuf.virt, hbq_buf->tag); found = 1; break; } i++; } if (!found) { len += snprintf(buf+len, size-len, "No DMAinfo?\n"); } skipit: hbqe++; if (len > LPFC_HBQINFO_SIZE - 54) break; } spin_unlock_irq(&phba->hbalock); return len; } static int lpfc_debugfs_last_hba_slim_off; /** * lpfc_debugfs_dumpHBASlim_data - Dump HBA SLIM info to a buffer. * @phba: The HBA to gather SLIM info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine dumps the current contents of HBA SLIM for the HBA associated * with @phba to @buf up to @size bytes of data. This is the raw HBA SLIM data. * * Notes: * This routine will only dump up to 1024 bytes of data each time called and * should be called multiple times to dump the entire HBA SLIM. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ static int lpfc_debugfs_dumpHBASlim_data(struct lpfc_hba *phba, char *buf, int size) { int len = 0; int i, off; uint32_t *ptr; char buffer[1024]; off = 0; spin_lock_irq(&phba->hbalock); len += snprintf(buf+len, size-len, "HBA SLIM\n"); lpfc_memcpy_from_slim(buffer, ((uint8_t *)phba->MBslimaddr) + lpfc_debugfs_last_hba_slim_off, 1024); ptr = (uint32_t *)&buffer[0]; off = lpfc_debugfs_last_hba_slim_off; /* Set it up for the next time */ lpfc_debugfs_last_hba_slim_off += 1024; if (lpfc_debugfs_last_hba_slim_off >= 4096) lpfc_debugfs_last_hba_slim_off = 0; i = 1024; while (i > 0) { len += snprintf(buf+len, size-len, "%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n", off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5), *(ptr+6), *(ptr+7)); ptr += 8; i -= (8 * sizeof(uint32_t)); off += (8 * sizeof(uint32_t)); } spin_unlock_irq(&phba->hbalock); return len; } /** * lpfc_debugfs_dumpHostSlim_data - Dump host SLIM info to a buffer. * @phba: The HBA to gather Host SLIM info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine dumps the current contents of host SLIM for the host associated * with @phba to @buf up to @size bytes of data. The dump will contain the * Mailbox, PCB, Rings, and Registers that are located in host memory. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ static int lpfc_debugfs_dumpHostSlim_data(struct lpfc_hba *phba, char *buf, int size) { int len = 0; int i, off; uint32_t word0, word1, word2, word3; uint32_t *ptr; struct lpfc_pgp *pgpp; struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; off = 0; spin_lock_irq(&phba->hbalock); len += snprintf(buf+len, size-len, "SLIM Mailbox\n"); ptr = (uint32_t *)phba->slim2p.virt; i = sizeof(MAILBOX_t); while (i > 0) { len += snprintf(buf+len, size-len, "%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n", off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5), *(ptr+6), *(ptr+7)); ptr += 8; i -= (8 * sizeof(uint32_t)); off += (8 * sizeof(uint32_t)); } len += snprintf(buf+len, size-len, "SLIM PCB\n"); ptr = (uint32_t *)phba->pcb; i = sizeof(PCB_t); while (i > 0) { len += snprintf(buf+len, size-len, "%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n", off, *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5), *(ptr+6), *(ptr+7)); ptr += 8; i -= (8 * sizeof(uint32_t)); off += (8 * sizeof(uint32_t)); } for (i = 0; i < 4; i++) { pgpp = &phba->port_gp[i]; pring = &psli->ring[i]; len += snprintf(buf+len, size-len, "Ring %d: CMD GetInx:%d (Max:%d Next:%d " "Local:%d flg:x%x) RSP PutInx:%d Max:%d\n", i, pgpp->cmdGetInx, pring->numCiocb, pring->next_cmdidx, pring->local_getidx, pring->flag, pgpp->rspPutInx, pring->numRiocb); } word0 = readl(phba->HAregaddr); word1 = readl(phba->CAregaddr); word2 = readl(phba->HSregaddr); word3 = readl(phba->HCregaddr); len += snprintf(buf+len, size-len, "HA:%08x CA:%08x HS:%08x HC:%08x\n", word0, word1, word2, word3); spin_unlock_irq(&phba->hbalock); return len; } /** * lpfc_debugfs_nodelist_data - Dump target node list to a buffer. * @vport: The vport to gather target node info from. * @buf: The buffer to dump log into. * @size: The maximum amount of data to process. * * Description: * This routine dumps the current target node list associated with @vport to * @buf up to @size bytes of data. Each node entry in the dump will contain a * node state, DID, WWPN, WWNN, RPI, flags, type, and other useful fields. * * Return Value: * This routine returns the amount of bytes that were dumped into @buf and will * not exceed @size. **/ 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, "usgmap:%x ", ndlp->nlp_usg_map); len += snprintf(buf+len, size-len, "refcnt:%x", atomic_read(&ndlp->kref.refcount)); len += snprintf(buf+len, size-len, "\n"); } spin_unlock_irq(shost->host_lock); return len; } #endif /** * lpfc_debugfs_disc_trc - Store discovery trace log. * @vport: The vport to associate this trace string with for retrieval. * @mask: Log entry classification. * @fmt: Format string to be displayed when dumping the log. * @data1: 1st data parameter to be applied to @fmt. * @data2: 2nd data parameter to be applied to @fmt. * @data3: 3rd data parameter to be applied to @fmt. * * Description: * This routine is used by the driver code to add a debugfs log entry to the * discovery trace buffer associated with @vport. Only entries with a @mask that * match the current debugfs discovery mask will be saved. Entries that do not * match will be thrown away. @fmt, @data1, @data2, and @data3 are used like * printf when displaying the log. **/ 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_debugfs_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_seq_trc_cnt); dtp->jif = jiffies; #endif return; } /** * lpfc_debugfs_slow_ring_trc - Store slow ring trace log. * @phba: The phba to associate this trace string with for retrieval. * @fmt: Format string to be displayed when dumping the log. * @data1: 1st data parameter to be applied to @fmt. * @data2: 2nd data parameter to be applied to @fmt. * @data3: 3rd data parameter to be applied to @fmt. * * Description: * This routine is used by the driver code to add a debugfs log entry to the * discovery trace buffer associated with @vport. @fmt, @data1, @data2, and * @data3 are used like printf when displaying the log. **/ inline void lpfc_debugfs_slow_ring_trc(struct lpfc_hba *phba, char *fmt, uint32_t data1, uint32_t data2, uint32_t data3) { #ifdef CONFIG_LPFC_DEBUG_FS struct lpfc_debugfs_trc *dtp; int index; if (!lpfc_debugfs_enable || !lpfc_debugfs_max_slow_ring_trc || !phba || !phba->slow_ring_trc) return; index = atomic_inc_return(&phba->slow_ring_trc_cnt) & (lpfc_debugfs_max_slow_ring_trc - 1); dtp = phba->slow_ring_trc + index; dtp->fmt = fmt; dtp->data1 = data1; dtp->data2 = data2; dtp->data3 = data3; dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_seq_trc_cnt); dtp->jif = jiffies; #endif return; } #ifdef CONFIG_LPFC_DEBUG_FS /** * lpfc_debugfs_disc_trc_open - Open the discovery trace log. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ 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 boundary */ size = (lpfc_debugfs_max_disc_trc * LPFC_DEBUG_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; } /** * lpfc_debugfs_slow_ring_trc_open - Open the Slow Ring trace log. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ static int lpfc_debugfs_slow_ring_trc_open(struct inode *inode, struct file *file) { struct lpfc_hba *phba = inode->i_private; struct lpfc_debug *debug; int size; int rc = -ENOMEM; if (!lpfc_debugfs_max_slow_ring_trc) { rc = -ENOSPC; goto out; } debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundary */ size = (lpfc_debugfs_max_slow_ring_trc * LPFC_DEBUG_TRC_ENTRY_SIZE); size = PAGE_ALIGN(size); debug->buffer = kmalloc(size, GFP_KERNEL); if (!debug->buffer) { kfree(debug); goto out; } debug->len = lpfc_debugfs_slow_ring_trc_data(phba, debug->buffer, size); file->private_data = debug; rc = 0; out: return rc; } /** * lpfc_debugfs_hbqinfo_open - Open the hbqinfo debugfs buffer. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ static int lpfc_debugfs_hbqinfo_open(struct inode *inode, struct file *file) { struct lpfc_hba *phba = inode->i_private; struct lpfc_debug *debug; int rc = -ENOMEM; debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundary */ debug->buffer = kmalloc(LPFC_HBQINFO_SIZE, GFP_KERNEL); if (!debug->buffer) { kfree(debug); goto out; } debug->len = lpfc_debugfs_hbqinfo_data(phba, debug->buffer, LPFC_HBQINFO_SIZE); file->private_data = debug; rc = 0; out: return rc; } /** * lpfc_debugfs_dumpHBASlim_open - Open the Dump HBA SLIM debugfs buffer. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ static int lpfc_debugfs_dumpHBASlim_open(struct inode *inode, struct file *file) { struct lpfc_hba *phba = inode->i_private; struct lpfc_debug *debug; int rc = -ENOMEM; debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundary */ debug->buffer = kmalloc(LPFC_DUMPHBASLIM_SIZE, GFP_KERNEL); if (!debug->buffer) { kfree(debug); goto out; } debug->len = lpfc_debugfs_dumpHBASlim_data(phba, debug->buffer, LPFC_DUMPHBASLIM_SIZE); file->private_data = debug; rc = 0; out: return rc; } /** * lpfc_debugfs_dumpHostSlim_open - Open the Dump Host SLIM debugfs buffer. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ static int lpfc_debugfs_dumpHostSlim_open(struct inode *inode, struct file *file) { struct lpfc_hba *phba = inode->i_private; struct lpfc_debug *debug; int rc = -ENOMEM; debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundary */ debug->buffer = kmalloc(LPFC_DUMPHOSTSLIM_SIZE, GFP_KERNEL); if (!debug->buffer) { kfree(debug); goto out; } debug->len = lpfc_debugfs_dumpHostSlim_data(phba, debug->buffer, LPFC_DUMPHOSTSLIM_SIZE); file->private_data = debug; rc = 0; out: return rc; } static int lpfc_debugfs_dumpData_open(struct inode *inode, struct file *file) { struct lpfc_debug *debug; int rc = -ENOMEM; if (!_dump_buf_data) return -EBUSY; debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundry */ printk(KERN_ERR "BLKGRD %s: _dump_buf_data=0x%p\n", __func__, _dump_buf_data); debug->buffer = _dump_buf_data; if (!debug->buffer) { kfree(debug); goto out; } debug->len = (1 << _dump_buf_data_order) << PAGE_SHIFT; file->private_data = debug; rc = 0; out: return rc; } static int lpfc_debugfs_dumpDif_open(struct inode *inode, struct file *file) { struct lpfc_debug *debug; int rc = -ENOMEM; if (!_dump_buf_dif) return -EBUSY; debug = kmalloc(sizeof(*debug), GFP_KERNEL); if (!debug) goto out; /* Round to page boundry */ printk(KERN_ERR "BLKGRD %s: _dump_buf_dif=0x%p file=%s\n", __func__, _dump_buf_dif, file->f_dentry->d_name.name); debug->buffer = _dump_buf_dif; if (!debug->buffer) { kfree(debug); goto out; } debug->len = (1 << _dump_buf_dif_order) << PAGE_SHIFT; file->private_data = debug; rc = 0; out: return rc; } static ssize_t lpfc_debugfs_dumpDataDif_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos) { /* * The Data/DIF buffers only save one failing IO * The write op is used as a reset mechanism after an IO has * already been saved to the next one can be saved */ spin_lock(&_dump_buf_lock); memset((void *)_dump_buf_data, 0, ((1 << PAGE_SHIFT) << _dump_buf_data_order)); memset((void *)_dump_buf_dif, 0, ((1 << PAGE_SHIFT) << _dump_buf_dif_order)); _dump_buf_done = 0; spin_unlock(&_dump_buf_lock); return nbytes; } /** * lpfc_debugfs_nodelist_open - Open the nodelist debugfs file. * @inode: The inode pointer that contains a vport pointer. * @file: The file pointer to attach the log output. * * Description: * This routine is the entry point for the debugfs open file operation. It gets * the vport from the i_private field in @inode, allocates the necessary buffer * for the log, fills the buffer from the in-memory log for this vport, and then * returns a pointer to that log in the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return an negative * error value. **/ 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 boundary */ 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; } /** * lpfc_debugfs_lseek - Seek through a debugfs file. * @file: The file pointer to seek through. * @off: The offset to seek to or the amount to seek by. * @whence: Indicates how to seek. * * Description: * This routine is the entry point for the debugfs lseek file operation. The * @whence parameter indicates whether @off is the offset to directly seek to, * or if it is a value to seek forward or reverse by. This function figures out * what the new offset of the debugfs file will be and assigns that value to the * f_pos field of @file. * * Returns: * This function returns the new offset if successful and returns a negative * error if unable to process the seek. **/ 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); } /** * lpfc_debugfs_read - Read a debugfs file. * @file: The file pointer to read from. * @buf: The buffer to copy the data to. * @nbytes: The number of bytes to read. * @ppos: The position in the file to start reading from. * * Description: * This routine reads data from from the buffer indicated in the private_data * field of @file. It will start reading at @ppos and copy up to @nbytes of * data to @buf. * * Returns: * This function returns the amount of data that was read (this could be less * than @nbytes if the end of the file was reached) or a negative error value. **/ 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); } /** * lpfc_debugfs_release - Release the buffer used to store debugfs file data. * @inode: The inode pointer that contains a vport pointer. (unused) * @file: The file pointer that contains the buffer to release. * * Description: * This routine frees the buffer that was allocated when the debugfs file was * opened. * * Returns: * This function returns zero. **/ 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; } static int lpfc_debugfs_dumpDataDif_release(struct inode *inode, struct file *file) { struct lpfc_debug *debug = file->private_data; debug->buffer = NULL; 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, }; #undef lpfc_debugfs_op_hbqinfo static struct file_operations lpfc_debugfs_op_hbqinfo = { .owner = THIS_MODULE, .open = lpfc_debugfs_hbqinfo_open, .llseek = lpfc_debugfs_lseek, .read = lpfc_debugfs_read, .release = lpfc_debugfs_release, }; #undef lpfc_debugfs_op_dumpHBASlim static struct file_operations lpfc_debugfs_op_dumpHBASlim = { .owner = THIS_MODULE, .open = lpfc_debugfs_dumpHBASlim_open, .llseek = lpfc_debugfs_lseek, .read = lpfc_debugfs_read, .release = lpfc_debugfs_release, }; #undef lpfc_debugfs_op_dumpHostSlim static struct file_operations lpfc_debugfs_op_dumpHostSlim = { .owner = THIS_MODULE, .open = lpfc_debugfs_dumpHostSlim_open, .llseek = lpfc_debugfs_lseek, .read = lpfc_debugfs_read, .release = lpfc_debugfs_release, }; #undef lpfc_debugfs_op_dumpData static struct file_operations lpfc_debugfs_op_dumpData = { .owner = THIS_MODULE, .open = lpfc_debugfs_dumpData_open, .llseek = lpfc_debugfs_lseek, .read = lpfc_debugfs_read, .write = lpfc_debugfs_dumpDataDif_write, .release = lpfc_debugfs_dumpDataDif_release, }; #undef lpfc_debugfs_op_dumpDif static struct file_operations lpfc_debugfs_op_dumpDif = { .owner = THIS_MODULE, .open = lpfc_debugfs_dumpDif_open, .llseek = lpfc_debugfs_lseek, .read = lpfc_debugfs_read, .write = lpfc_debugfs_dumpDataDif_write, .release = lpfc_debugfs_dumpDataDif_release, }; #undef lpfc_debugfs_op_slow_ring_trc static struct file_operations lpfc_debugfs_op_slow_ring_trc = { .owner = THIS_MODULE, .open = lpfc_debugfs_slow_ring_trc_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 /** * lpfc_debugfs_initialize - Initialize debugfs for a vport. * @vport: The vport pointer to initialize. * * Description: * When Debugfs is configured this routine sets up the lpfc debugfs file system. * If not already created, this routine will create the lpfc directory, and * lpfcX directory (for this HBA), and vportX directory for this vport. It will * also create each file used to access lpfc specific debugfs information. **/ 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; /* Setup lpfc root directory */ if (!lpfc_debugfs_root) { lpfc_debugfs_root = debugfs_create_dir("lpfc", NULL); atomic_set(&lpfc_debugfs_hba_count, 0); if (!lpfc_debugfs_root) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0408 Cannot create debugfs root\n"); goto debug_failed; } } if (!lpfc_debugfs_start_time) lpfc_debugfs_start_time = jiffies; /* Setup lpfcX directory for specific HBA */ 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) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0412 Cannot create debugfs hba\n"); goto debug_failed; } atomic_inc(&lpfc_debugfs_hba_count); atomic_set(&phba->debugfs_vport_count, 0); /* Setup hbqinfo */ snprintf(name, sizeof(name), "hbqinfo"); phba->debug_hbqinfo = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_hbqinfo); if (!phba->debug_hbqinfo) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0411 Cannot create debugfs hbqinfo\n"); goto debug_failed; } /* Setup dumpHBASlim */ snprintf(name, sizeof(name), "dumpHBASlim"); phba->debug_dumpHBASlim = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_dumpHBASlim); if (!phba->debug_dumpHBASlim) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0413 Cannot create debugfs dumpHBASlim\n"); goto debug_failed; } /* Setup dumpHostSlim */ snprintf(name, sizeof(name), "dumpHostSlim"); phba->debug_dumpHostSlim = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_dumpHostSlim); if (!phba->debug_dumpHostSlim) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0414 Cannot create debugfs dumpHostSlim\n"); goto debug_failed; } /* Setup dumpData */ snprintf(name, sizeof(name), "dumpData"); phba->debug_dumpData = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_dumpData); if (!phba->debug_dumpData) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0800 Cannot create debugfs dumpData\n"); goto debug_failed; } /* Setup dumpDif */ snprintf(name, sizeof(name), "dumpDif"); phba->debug_dumpDif = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_dumpDif); if (!phba->debug_dumpDif) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0801 Cannot create debugfs dumpDif\n"); goto debug_failed; } /* Setup slow ring trace */ if (lpfc_debugfs_max_slow_ring_trc) { num = lpfc_debugfs_max_slow_ring_trc - 1; if (num & lpfc_debugfs_max_slow_ring_trc) { /* Change to be a power of 2 */ num = lpfc_debugfs_max_slow_ring_trc; i = 0; while (num > 1) { num = num >> 1; i++; } lpfc_debugfs_max_slow_ring_trc = (1 << i); printk(KERN_ERR "lpfc_debugfs_max_disc_trc changed to " "%d\n", lpfc_debugfs_max_disc_trc); } } snprintf(name, sizeof(name), "slow_ring_trace"); phba->debug_slow_ring_trc = debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, phba->hba_debugfs_root, phba, &lpfc_debugfs_op_slow_ring_trc); if (!phba->debug_slow_ring_trc) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0415 Cannot create debugfs " "slow_ring_trace\n"); goto debug_failed; } if (!phba->slow_ring_trc) { phba->slow_ring_trc = kmalloc( (sizeof(struct lpfc_debugfs_trc) * lpfc_debugfs_max_slow_ring_trc), GFP_KERNEL); if (!phba->slow_ring_trc) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0416 Cannot create debugfs " "slow_ring buffer\n"); goto debug_failed; } atomic_set(&phba->slow_ring_trc_cnt, 0); memset(phba->slow_ring_trc, 0, (sizeof(struct lpfc_debugfs_trc) * lpfc_debugfs_max_slow_ring_trc)); } } 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) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0417 Cant create debugfs"); goto debug_failed; } atomic_inc(&phba->debugfs_vport_count); } 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); } } vport->disc_trc = kzalloc( (sizeof(struct lpfc_debugfs_trc) * lpfc_debugfs_max_disc_trc), GFP_KERNEL); if (!vport->disc_trc) { lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, "0418 Cannot create debugfs disc trace " "buffer\n"); goto debug_failed; } atomic_set(&vport->disc_trc_cnt, 0); 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_vlog(vport, KERN_ERR, LOG_INIT, "0419 Cannot create debugfs " "discovery_trace\n"); 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_vlog(vport, KERN_ERR, LOG_INIT, "0409 Cant create debugfs nodelist"); goto debug_failed; } debug_failed: return; #endif } /** * lpfc_debugfs_terminate - Tear down debugfs infrastructure for this vport. * @vport: The vport pointer to remove from debugfs. * * Description: * When Debugfs is configured this routine removes debugfs file system elements * that are specific to this vport. It also checks to see if there are any * users left for the debugfs directories associated with the HBA and driver. If * this is the last user of the HBA directory or driver directory then it will * remove those from the debugfs infrastructure as well. **/ 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) { if (phba->debug_hbqinfo) { debugfs_remove(phba->debug_hbqinfo); /* hbqinfo */ phba->debug_hbqinfo = NULL; } if (phba->debug_dumpHBASlim) { debugfs_remove(phba->debug_dumpHBASlim); /* HBASlim */ phba->debug_dumpHBASlim = NULL; } if (phba->debug_dumpHostSlim) { debugfs_remove(phba->debug_dumpHostSlim); /* HostSlim */ phba->debug_dumpHostSlim = NULL; } if (phba->debug_dumpData) { debugfs_remove(phba->debug_dumpData); /* dumpData */ phba->debug_dumpData = NULL; } if (phba->debug_dumpDif) { debugfs_remove(phba->debug_dumpDif); /* dumpDif */ phba->debug_dumpDif = NULL; } if (phba->slow_ring_trc) { kfree(phba->slow_ring_trc); phba->slow_ring_trc = NULL; } if (phba->debug_slow_ring_trc) { /* slow_ring_trace */ debugfs_remove(phba->debug_slow_ring_trc); phba->debug_slow_ring_trc = NULL; } if (phba->hba_debugfs_root) { debugfs_remove(phba->hba_debugfs_root); /* lpfcX */ 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 return; }