1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2007 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of version 2 of the GNU General *
11 * Public License as published by the Free Software Foundation. *
12 * This program is distributed in the hope that it will be useful. *
13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17 * TO BE LEGALLY INVALID. See the GNU General Public License for *
18 * more details, a copy of which can be found in the file COPYING *
19 * included with this package. *
20 *******************************************************************/
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_tcq.h>
30 #include <scsi/scsi_transport_fc.h>
32 #include "lpfc_version.h"
35 #include "lpfc_disc.h"
36 #include "lpfc_scsi.h"
38 #include "lpfc_logmsg.h"
39 #include "lpfc_crtn.h"
40 #include "lpfc_vport.h"
42 #define LPFC_RESET_WAIT 2
43 #define LPFC_ABORT_WAIT 2
46 * This function is called with no lock held when there is a resource
47 * error in driver or in firmware.
50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
54 spin_lock_irqsave(&phba->hbalock, flags);
55 atomic_inc(&phba->num_rsrc_err);
56 phba->last_rsrc_error_time = jiffies;
58 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
59 spin_unlock_irqrestore(&phba->hbalock, flags);
63 phba->last_ramp_down_time = jiffies;
65 spin_unlock_irqrestore(&phba->hbalock, flags);
67 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
68 if ((phba->pport->work_port_events &
69 WORKER_RAMP_DOWN_QUEUE) == 0) {
70 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
72 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
74 spin_lock_irqsave(&phba->hbalock, flags);
76 wake_up(phba->work_wait);
77 spin_unlock_irqrestore(&phba->hbalock, flags);
83 * This function is called with no lock held when there is a successful
84 * SCSI command completion.
87 lpfc_rampup_queue_depth(struct lpfc_vport *vport,
88 struct scsi_device *sdev)
91 struct lpfc_hba *phba = vport->phba;
92 atomic_inc(&phba->num_cmd_success);
94 if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
96 spin_lock_irqsave(&phba->hbalock, flags);
97 if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
98 ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
99 spin_unlock_irqrestore(&phba->hbalock, flags);
102 phba->last_ramp_up_time = jiffies;
103 spin_unlock_irqrestore(&phba->hbalock, flags);
105 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
106 if ((phba->pport->work_port_events &
107 WORKER_RAMP_UP_QUEUE) == 0) {
108 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
110 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
112 spin_lock_irqsave(&phba->hbalock, flags);
114 wake_up(phba->work_wait);
115 spin_unlock_irqrestore(&phba->hbalock, flags);
119 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
121 struct lpfc_vport **vports;
122 struct Scsi_Host *shost;
123 struct scsi_device *sdev;
124 unsigned long new_queue_depth;
125 unsigned long num_rsrc_err, num_cmd_success;
128 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
129 num_cmd_success = atomic_read(&phba->num_cmd_success);
131 vports = lpfc_create_vport_work_array(phba);
133 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
134 shost = lpfc_shost_from_vport(vports[i]);
135 shost_for_each_device(sdev, shost) {
137 sdev->queue_depth * num_rsrc_err /
138 (num_rsrc_err + num_cmd_success);
139 if (!new_queue_depth)
140 new_queue_depth = sdev->queue_depth - 1;
142 new_queue_depth = sdev->queue_depth -
144 if (sdev->ordered_tags)
145 scsi_adjust_queue_depth(sdev,
149 scsi_adjust_queue_depth(sdev,
154 lpfc_destroy_vport_work_array(vports);
155 atomic_set(&phba->num_rsrc_err, 0);
156 atomic_set(&phba->num_cmd_success, 0);
160 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
162 struct lpfc_vport **vports;
163 struct Scsi_Host *shost;
164 struct scsi_device *sdev;
167 vports = lpfc_create_vport_work_array(phba);
169 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
170 shost = lpfc_shost_from_vport(vports[i]);
171 shost_for_each_device(sdev, shost) {
172 if (sdev->ordered_tags)
173 scsi_adjust_queue_depth(sdev,
175 sdev->queue_depth+1);
177 scsi_adjust_queue_depth(sdev,
179 sdev->queue_depth+1);
182 lpfc_destroy_vport_work_array(vports);
183 atomic_set(&phba->num_rsrc_err, 0);
184 atomic_set(&phba->num_cmd_success, 0);
188 * This routine allocates a scsi buffer, which contains all the necessary
189 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
190 * contains information to build the IOCB. The DMAable region contains
191 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
192 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
193 * and the BPL BDE is setup in the IOCB.
195 static struct lpfc_scsi_buf *
196 lpfc_new_scsi_buf(struct lpfc_vport *vport)
198 struct lpfc_hba *phba = vport->phba;
199 struct lpfc_scsi_buf *psb;
200 struct ulp_bde64 *bpl;
202 dma_addr_t pdma_phys;
205 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
210 * Get memory from the pci pool to map the virt space to pci bus space
211 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
212 * struct fcp_rsp and the number of bde's necessary to support the
215 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
222 /* Initialize virtual ptrs to dma_buf region. */
223 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
225 /* Allocate iotag for psb->cur_iocbq. */
226 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
228 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
229 psb->data, psb->dma_handle);
233 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
235 psb->fcp_cmnd = psb->data;
236 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
237 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
238 sizeof(struct fcp_rsp);
240 /* Initialize local short-hand pointers. */
242 pdma_phys = psb->dma_handle;
245 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
246 * list bdes. Initialize the first two and leave the rest for
249 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
250 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
251 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
252 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
253 bpl->tus.w = le32_to_cpu(bpl->tus.w);
256 /* Setup the physical region for the FCP RSP */
257 pdma_phys += sizeof (struct fcp_cmnd);
258 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
259 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
260 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
261 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
262 bpl->tus.w = le32_to_cpu(bpl->tus.w);
265 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
266 * initialize it with all known data now.
268 pdma_phys += (sizeof (struct fcp_rsp));
269 iocb = &psb->cur_iocbq.iocb;
270 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
271 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
272 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
273 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
274 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
275 iocb->ulpBdeCount = 1;
276 iocb->ulpClass = CLASS3;
281 static struct lpfc_scsi_buf*
282 lpfc_get_scsi_buf(struct lpfc_hba * phba)
284 struct lpfc_scsi_buf * lpfc_cmd = NULL;
285 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
286 unsigned long iflag = 0;
288 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
289 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
291 lpfc_cmd->seg_cnt = 0;
292 lpfc_cmd->nonsg_phys = 0;
294 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
299 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
301 unsigned long iflag = 0;
303 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
305 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
306 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
310 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
312 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
313 struct scatterlist *sgel = NULL;
314 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
315 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
316 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
318 uint32_t i, num_bde = 0;
319 int nseg, datadir = scsi_cmnd->sc_data_direction;
322 * There are three possibilities here - use scatter-gather segment, use
323 * the single mapping, or neither. Start the lpfc command prep by
324 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
328 if (scsi_sg_count(scsi_cmnd)) {
330 * The driver stores the segment count returned from pci_map_sg
331 * because this a count of dma-mappings used to map the use_sg
332 * pages. They are not guaranteed to be the same for those
333 * architectures that implement an IOMMU.
336 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
337 scsi_sg_count(scsi_cmnd), datadir);
341 lpfc_cmd->seg_cnt = nseg;
342 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
343 printk(KERN_ERR "%s: Too many sg segments from "
344 "dma_map_sg. Config %d, seg_cnt %d",
345 __FUNCTION__, phba->cfg_sg_seg_cnt,
347 scsi_dma_unmap(scsi_cmnd);
352 * The driver established a maximum scatter-gather segment count
353 * during probe that limits the number of sg elements in any
354 * single scsi command. Just run through the seg_cnt and format
357 scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) {
358 physaddr = sg_dma_address(sgel);
359 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
360 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
361 bpl->tus.f.bdeSize = sg_dma_len(sgel);
362 if (datadir == DMA_TO_DEVICE)
363 bpl->tus.f.bdeFlags = 0;
365 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
366 bpl->tus.w = le32_to_cpu(bpl->tus.w);
373 * Finish initializing those IOCB fields that are dependent on the
374 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
375 * reinitialized since all iocb memory resources are used many times
376 * for transmit, receive, and continuation bpl's.
378 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
379 iocb_cmd->un.fcpi64.bdl.bdeSize +=
380 (num_bde * sizeof (struct ulp_bde64));
381 iocb_cmd->ulpBdeCount = 1;
383 fcp_cmnd->fcpDl = be32_to_cpu(scsi_bufflen(scsi_cmnd));
388 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
391 * There are only two special cases to consider. (1) the scsi command
392 * requested scatter-gather usage or (2) the scsi command allocated
393 * a request buffer, but did not request use_sg. There is a third
394 * case, but it does not require resource deallocation.
396 if (psb->seg_cnt > 0)
397 scsi_dma_unmap(psb->pCmd);
401 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
402 struct lpfc_iocbq *rsp_iocb)
404 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
405 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
406 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
407 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
408 uint32_t resp_info = fcprsp->rspStatus2;
409 uint32_t scsi_status = fcprsp->rspStatus3;
411 uint32_t host_status = DID_OK;
413 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
416 * If this is a task management command, there is no
417 * scsi packet associated with this lpfc_cmd. The driver
420 if (fcpcmd->fcpCntl2) {
425 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
426 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
427 if (snslen > SCSI_SENSE_BUFFERSIZE)
428 snslen = SCSI_SENSE_BUFFERSIZE;
430 if (resp_info & RSP_LEN_VALID)
431 rsplen = be32_to_cpu(fcprsp->rspRspLen);
432 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
434 lp = (uint32_t *)cmnd->sense_buffer;
436 if (!scsi_status && (resp_info & RESID_UNDER))
439 lpfc_printf_vlog(vport, KERN_WARNING, logit,
440 "0730 FCP command x%x failed: x%x SNS x%x x%x "
441 "Data: x%x x%x x%x x%x x%x\n",
442 cmnd->cmnd[0], scsi_status,
443 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
444 be32_to_cpu(fcprsp->rspResId),
445 be32_to_cpu(fcprsp->rspSnsLen),
446 be32_to_cpu(fcprsp->rspRspLen),
449 if (resp_info & RSP_LEN_VALID) {
450 rsplen = be32_to_cpu(fcprsp->rspRspLen);
451 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
452 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
453 host_status = DID_ERROR;
458 scsi_set_resid(cmnd, 0);
459 if (resp_info & RESID_UNDER) {
460 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
462 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
463 "0716 FCP Read Underrun, expected %d, "
464 "residual %d Data: x%x x%x x%x\n",
465 be32_to_cpu(fcpcmd->fcpDl),
466 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
470 * If there is an under run check if under run reported by
471 * storage array is same as the under run reported by HBA.
472 * If this is not same, there is a dropped frame.
474 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
476 (scsi_get_resid(cmnd) != fcpi_parm)) {
477 lpfc_printf_vlog(vport, KERN_WARNING,
478 LOG_FCP | LOG_FCP_ERROR,
479 "0735 FCP Read Check Error "
480 "and Underrun Data: x%x x%x x%x x%x\n",
481 be32_to_cpu(fcpcmd->fcpDl),
482 scsi_get_resid(cmnd), fcpi_parm,
484 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
485 host_status = DID_ERROR;
488 * The cmnd->underflow is the minimum number of bytes that must
489 * be transfered for this command. Provided a sense condition
490 * is not present, make sure the actual amount transferred is at
491 * least the underflow value or fail.
493 if (!(resp_info & SNS_LEN_VALID) &&
494 (scsi_status == SAM_STAT_GOOD) &&
495 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
496 < cmnd->underflow)) {
497 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
498 "0717 FCP command x%x residual "
499 "underrun converted to error "
500 "Data: x%x x%x x%x\n",
501 cmnd->cmnd[0], scsi_bufflen(cmnd),
502 scsi_get_resid(cmnd), cmnd->underflow);
503 host_status = DID_ERROR;
505 } else if (resp_info & RESID_OVER) {
506 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
507 "0720 FCP command x%x residual overrun error. "
508 "Data: x%x x%x \n", cmnd->cmnd[0],
509 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
510 host_status = DID_ERROR;
513 * Check SLI validation that all the transfer was actually done
514 * (fcpi_parm should be zero). Apply check only to reads.
516 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
517 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
518 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
519 "0734 FCP Read Check Error Data: "
521 be32_to_cpu(fcpcmd->fcpDl),
522 be32_to_cpu(fcprsp->rspResId),
523 fcpi_parm, cmnd->cmnd[0]);
524 host_status = DID_ERROR;
525 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
529 cmnd->result = ScsiResult(host_status, scsi_status);
533 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
534 struct lpfc_iocbq *pIocbOut)
536 struct lpfc_scsi_buf *lpfc_cmd =
537 (struct lpfc_scsi_buf *) pIocbIn->context1;
538 struct lpfc_vport *vport = pIocbIn->vport;
539 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
540 struct lpfc_nodelist *pnode = rdata->pnode;
541 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
543 struct scsi_device *sdev, *tmp_sdev;
547 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
548 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
550 if (lpfc_cmd->status) {
551 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
552 (lpfc_cmd->result & IOERR_DRVR_MASK))
553 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
554 else if (lpfc_cmd->status >= IOSTAT_CNT)
555 lpfc_cmd->status = IOSTAT_DEFAULT;
557 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
558 "0729 FCP cmd x%x failed <%d/%d> "
559 "status: x%x result: x%x Data: x%x x%x\n",
561 cmd->device ? cmd->device->id : 0xffff,
562 cmd->device ? cmd->device->lun : 0xffff,
563 lpfc_cmd->status, lpfc_cmd->result,
564 pIocbOut->iocb.ulpContext,
565 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
567 switch (lpfc_cmd->status) {
568 case IOSTAT_FCP_RSP_ERROR:
569 /* Call FCP RSP handler to determine result */
570 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
572 case IOSTAT_NPORT_BSY:
573 case IOSTAT_FABRIC_BSY:
574 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
576 case IOSTAT_LOCAL_REJECT:
577 if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
578 lpfc_cmd->result == IOERR_NO_RESOURCES ||
579 lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
580 cmd->result = ScsiResult(DID_REQUEUE, 0);
582 } /* else: fall through */
584 cmd->result = ScsiResult(DID_ERROR, 0);
589 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
590 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
592 cmd->result = ScsiResult(DID_OK, 0);
595 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
596 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
598 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
599 "0710 Iodone <%d/%d> cmd %p, error "
600 "x%x SNS x%x x%x Data: x%x x%x\n",
601 cmd->device->id, cmd->device->lun, cmd,
602 cmd->result, *lp, *(lp + 3), cmd->retries,
603 scsi_get_resid(cmd));
606 result = cmd->result;
608 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
611 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
613 * If there is a thread waiting for command completion
614 * wake up the thread.
616 spin_lock_irqsave(sdev->host->host_lock, flags);
617 lpfc_cmd->pCmd = NULL;
619 wake_up(lpfc_cmd->waitq);
620 spin_unlock_irqrestore(sdev->host->host_lock, flags);
621 lpfc_release_scsi_buf(phba, lpfc_cmd);
627 lpfc_rampup_queue_depth(vport, sdev);
629 if (!result && pnode != NULL &&
630 ((jiffies - pnode->last_ramp_up_time) >
631 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
632 ((jiffies - pnode->last_q_full_time) >
633 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
634 (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
635 shost_for_each_device(tmp_sdev, sdev->host) {
636 if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
637 if (tmp_sdev->id != sdev->id)
639 if (tmp_sdev->ordered_tags)
640 scsi_adjust_queue_depth(tmp_sdev,
642 tmp_sdev->queue_depth+1);
644 scsi_adjust_queue_depth(tmp_sdev,
646 tmp_sdev->queue_depth+1);
648 pnode->last_ramp_up_time = jiffies;
654 * Check for queue full. If the lun is reporting queue full, then
655 * back off the lun queue depth to prevent target overloads.
657 if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
658 pnode->last_q_full_time = jiffies;
660 shost_for_each_device(tmp_sdev, sdev->host) {
661 if (tmp_sdev->id != sdev->id)
663 depth = scsi_track_queue_full(tmp_sdev,
664 tmp_sdev->queue_depth - 1);
667 * The queue depth cannot be lowered any more.
668 * Modify the returned error code to store
669 * the final depth value set by
670 * scsi_track_queue_full.
673 depth = sdev->host->cmd_per_lun;
676 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
677 "0711 detected queue full - lun queue "
678 "depth adjusted to %d.\n", depth);
683 * If there is a thread waiting for command completion
684 * wake up the thread.
686 spin_lock_irqsave(sdev->host->host_lock, flags);
687 lpfc_cmd->pCmd = NULL;
689 wake_up(lpfc_cmd->waitq);
690 spin_unlock_irqrestore(sdev->host->host_lock, flags);
692 lpfc_release_scsi_buf(phba, lpfc_cmd);
696 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
697 struct lpfc_nodelist *pnode)
699 struct lpfc_hba *phba = vport->phba;
700 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
701 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
702 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
703 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
704 int datadir = scsi_cmnd->sc_data_direction;
707 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
708 /* clear task management bits */
709 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
711 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
712 &lpfc_cmd->fcp_cmnd->fcp_lun);
714 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
716 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
718 case HEAD_OF_QUEUE_TAG:
719 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
721 case ORDERED_QUEUE_TAG:
722 fcp_cmnd->fcpCntl1 = ORDERED_Q;
725 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
729 fcp_cmnd->fcpCntl1 = 0;
732 * There are three possibilities here - use scatter-gather segment, use
733 * the single mapping, or neither. Start the lpfc command prep by
734 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
737 if (scsi_sg_count(scsi_cmnd)) {
738 if (datadir == DMA_TO_DEVICE) {
739 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
740 iocb_cmd->un.fcpi.fcpi_parm = 0;
742 fcp_cmnd->fcpCntl3 = WRITE_DATA;
743 phba->fc4OutputRequests++;
745 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
746 iocb_cmd->ulpPU = PARM_READ_CHECK;
747 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
748 fcp_cmnd->fcpCntl3 = READ_DATA;
749 phba->fc4InputRequests++;
752 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
753 iocb_cmd->un.fcpi.fcpi_parm = 0;
755 fcp_cmnd->fcpCntl3 = 0;
756 phba->fc4ControlRequests++;
760 * Finish initializing those IOCB fields that are independent
761 * of the scsi_cmnd request_buffer
763 piocbq->iocb.ulpContext = pnode->nlp_rpi;
764 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
765 piocbq->iocb.ulpFCP2Rcvy = 1;
767 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
768 piocbq->context1 = lpfc_cmd;
769 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
770 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
771 piocbq->vport = vport;
775 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
776 struct lpfc_scsi_buf *lpfc_cmd,
778 uint8_t task_mgmt_cmd)
780 struct lpfc_iocbq *piocbq;
782 struct fcp_cmnd *fcp_cmnd;
783 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
784 struct lpfc_nodelist *ndlp = rdata->pnode;
786 if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
790 piocbq = &(lpfc_cmd->cur_iocbq);
791 piocbq->vport = vport;
793 piocb = &piocbq->iocb;
795 fcp_cmnd = lpfc_cmd->fcp_cmnd;
796 int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
797 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
799 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
801 piocb->ulpContext = ndlp->nlp_rpi;
802 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
803 piocb->ulpFCP2Rcvy = 1;
805 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
807 /* ulpTimeout is only one byte */
808 if (lpfc_cmd->timeout > 0xff) {
810 * Do not timeout the command at the firmware level.
811 * The driver will provide the timeout mechanism.
813 piocb->ulpTimeout = 0;
815 piocb->ulpTimeout = lpfc_cmd->timeout;
822 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
823 struct lpfc_iocbq *cmdiocbq,
824 struct lpfc_iocbq *rspiocbq)
826 struct lpfc_scsi_buf *lpfc_cmd =
827 (struct lpfc_scsi_buf *) cmdiocbq->context1;
829 lpfc_release_scsi_buf(phba, lpfc_cmd);
834 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
835 unsigned tgt_id, unsigned int lun,
836 struct lpfc_rport_data *rdata)
838 struct lpfc_hba *phba = vport->phba;
839 struct lpfc_iocbq *iocbq;
840 struct lpfc_iocbq *iocbqrsp;
846 lpfc_cmd->rdata = rdata;
847 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
852 iocbq = &lpfc_cmd->cur_iocbq;
853 iocbqrsp = lpfc_sli_get_iocbq(phba);
858 /* Issue Target Reset to TGT <num> */
859 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
860 "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
861 tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
862 ret = lpfc_sli_issue_iocb_wait(phba,
863 &phba->sli.ring[phba->sli.fcp_ring],
864 iocbq, iocbqrsp, lpfc_cmd->timeout);
865 if (ret != IOCB_SUCCESS) {
866 if (ret == IOCB_TIMEDOUT)
867 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
868 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
871 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
872 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
873 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
874 (lpfc_cmd->result & IOERR_DRVR_MASK))
875 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
878 lpfc_sli_release_iocbq(phba, iocbqrsp);
883 lpfc_info(struct Scsi_Host *host)
885 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
886 struct lpfc_hba *phba = vport->phba;
888 static char lpfcinfobuf[384];
890 memset(lpfcinfobuf,0,384);
891 if (phba && phba->pcidev){
892 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
893 len = strlen(lpfcinfobuf);
894 snprintf(lpfcinfobuf + len,
896 " on PCI bus %02x device %02x irq %d",
897 phba->pcidev->bus->number,
900 len = strlen(lpfcinfobuf);
902 snprintf(lpfcinfobuf + len,
911 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
913 unsigned long poll_tmo_expires =
914 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
916 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
917 mod_timer(&phba->fcp_poll_timer,
921 void lpfc_poll_start_timer(struct lpfc_hba * phba)
923 lpfc_poll_rearm_timer(phba);
926 void lpfc_poll_timeout(unsigned long ptr)
928 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
930 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
931 lpfc_sli_poll_fcp_ring (phba);
932 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
933 lpfc_poll_rearm_timer(phba);
938 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
940 struct Scsi_Host *shost = cmnd->device->host;
941 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
942 struct lpfc_hba *phba = vport->phba;
943 struct lpfc_sli *psli = &phba->sli;
944 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
945 struct lpfc_nodelist *ndlp = rdata->pnode;
946 struct lpfc_scsi_buf *lpfc_cmd;
947 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
950 err = fc_remote_port_chkready(rport);
953 goto out_fail_command;
957 * Catch race where our node has transitioned, but the
958 * transport is still transitioning.
961 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
962 goto out_fail_command;
964 lpfc_cmd = lpfc_get_scsi_buf(phba);
965 if (lpfc_cmd == NULL) {
966 lpfc_adjust_queue_depth(phba);
968 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
969 "0707 driver's buffer pool is empty, "
975 * Store the midlayer's command structure for the completion phase
976 * and complete the command initialization.
978 lpfc_cmd->pCmd = cmnd;
979 lpfc_cmd->rdata = rdata;
980 lpfc_cmd->timeout = 0;
981 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
982 cmnd->scsi_done = done;
984 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
986 goto out_host_busy_free_buf;
988 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
990 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
991 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
993 goto out_host_busy_free_buf;
995 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
996 lpfc_sli_poll_fcp_ring(phba);
997 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
998 lpfc_poll_rearm_timer(phba);
1003 out_host_busy_free_buf:
1004 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1005 lpfc_release_scsi_buf(phba, lpfc_cmd);
1007 return SCSI_MLQUEUE_HOST_BUSY;
1015 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1017 struct Scsi_Host *shost = cmnd->device->host;
1018 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1020 spin_lock_irq(shost->host_lock);
1021 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1022 spin_unlock_irq(shost->host_lock);
1024 spin_lock_irq(shost->host_lock);
1026 spin_unlock_irq(shost->host_lock);
1031 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1033 struct Scsi_Host *shost = cmnd->device->host;
1034 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1035 struct lpfc_hba *phba = vport->phba;
1036 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1037 struct lpfc_iocbq *iocb;
1038 struct lpfc_iocbq *abtsiocb;
1039 struct lpfc_scsi_buf *lpfc_cmd;
1042 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1044 lpfc_block_error_handler(cmnd);
1045 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1049 * If pCmd field of the corresponding lpfc_scsi_buf structure
1050 * points to a different SCSI command, then the driver has
1051 * already completed this command, but the midlayer did not
1052 * see the completion before the eh fired. Just return
1055 iocb = &lpfc_cmd->cur_iocbq;
1056 if (lpfc_cmd->pCmd != cmnd)
1059 BUG_ON(iocb->context1 != lpfc_cmd);
1061 abtsiocb = lpfc_sli_get_iocbq(phba);
1062 if (abtsiocb == NULL) {
1068 * The scsi command can not be in txq and it is in flight because the
1069 * pCmd is still pointig at the SCSI command we have to abort. There
1070 * is no need to search the txcmplq. Just send an abort to the FW.
1074 icmd = &abtsiocb->iocb;
1075 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1076 icmd->un.acxri.abortContextTag = cmd->ulpContext;
1077 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1080 icmd->ulpClass = cmd->ulpClass;
1081 if (lpfc_is_link_up(phba))
1082 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1084 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1086 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1087 abtsiocb->vport = vport;
1088 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1089 lpfc_sli_release_iocbq(phba, abtsiocb);
1094 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1095 lpfc_sli_poll_fcp_ring (phba);
1097 lpfc_cmd->waitq = &waitq;
1098 /* Wait for abort to complete */
1099 wait_event_timeout(waitq,
1100 (lpfc_cmd->pCmd != cmnd),
1101 (2*vport->cfg_devloss_tmo*HZ));
1103 spin_lock_irq(shost->host_lock);
1104 lpfc_cmd->waitq = NULL;
1105 spin_unlock_irq(shost->host_lock);
1107 if (lpfc_cmd->pCmd == cmnd) {
1109 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1110 "0748 abort handler timed out waiting "
1111 "for abort to complete: ret %#x, ID %d, "
1112 "LUN %d, snum %#lx\n",
1113 ret, cmnd->device->id, cmnd->device->lun,
1114 cmnd->serial_number);
1118 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1119 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1120 "LUN %d snum %#lx\n", ret, cmnd->device->id,
1121 cmnd->device->lun, cmnd->serial_number);
1126 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1128 struct Scsi_Host *shost = cmnd->device->host;
1129 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1130 struct lpfc_hba *phba = vport->phba;
1131 struct lpfc_scsi_buf *lpfc_cmd;
1132 struct lpfc_iocbq *iocbq, *iocbqrsp;
1133 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1134 struct lpfc_nodelist *pnode = rdata->pnode;
1135 uint32_t cmd_result = 0, cmd_status = 0;
1137 int iocb_status = IOCB_SUCCESS;
1140 lpfc_block_error_handler(cmnd);
1143 * If target is not in a MAPPED state, delay the reset until
1144 * target is rediscovered or devloss timeout expires.
1150 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1151 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1153 rdata = cmnd->device->hostdata;
1155 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1156 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1157 "0721 LUN Reset rport "
1158 "failure: cnt x%x rdata x%p\n",
1162 pnode = rdata->pnode;
1166 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1170 lpfc_cmd = lpfc_get_scsi_buf(phba);
1171 if (lpfc_cmd == NULL)
1174 lpfc_cmd->timeout = 60;
1175 lpfc_cmd->rdata = rdata;
1177 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1180 goto out_free_scsi_buf;
1182 iocbq = &lpfc_cmd->cur_iocbq;
1184 /* get a buffer for this IOCB command response */
1185 iocbqrsp = lpfc_sli_get_iocbq(phba);
1186 if (iocbqrsp == NULL)
1187 goto out_free_scsi_buf;
1189 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1190 "0703 Issue target reset to TGT %d LUN %d "
1191 "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1192 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1193 iocb_status = lpfc_sli_issue_iocb_wait(phba,
1194 &phba->sli.ring[phba->sli.fcp_ring],
1195 iocbq, iocbqrsp, lpfc_cmd->timeout);
1197 if (iocb_status == IOCB_TIMEDOUT)
1198 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1200 if (iocb_status == IOCB_SUCCESS)
1205 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1206 cmd_status = iocbqrsp->iocb.ulpStatus;
1208 lpfc_sli_release_iocbq(phba, iocbqrsp);
1211 * All outstanding txcmplq I/Os should have been aborted by the device.
1212 * Unfortunately, some targets do not abide by this forcing the driver
1215 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1218 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1219 cmnd->device->id, cmnd->device->lun,
1223 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1226 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1229 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1230 cmnd->device->lun, LPFC_CTX_LUN);
1234 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1235 "0719 device reset I/O flush failure: "
1241 if (iocb_status != IOCB_TIMEDOUT) {
1242 lpfc_release_scsi_buf(phba, lpfc_cmd);
1244 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1245 "0713 SCSI layer issued device reset (%d, %d) "
1246 "return x%x status x%x result x%x\n",
1247 cmnd->device->id, cmnd->device->lun, ret,
1248 cmd_status, cmd_result);
1254 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1256 struct Scsi_Host *shost = cmnd->device->host;
1257 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1258 struct lpfc_hba *phba = vport->phba;
1259 struct lpfc_nodelist *ndlp = NULL;
1261 int ret = FAILED, i, err_count = 0;
1263 struct lpfc_scsi_buf * lpfc_cmd;
1265 lpfc_block_error_handler(cmnd);
1267 lpfc_cmd = lpfc_get_scsi_buf(phba);
1268 if (lpfc_cmd == NULL)
1271 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1272 lpfc_cmd->timeout = 60;
1275 * Since the driver manages a single bus device, reset all
1276 * targets known to the driver. Should any target reset
1277 * fail, this routine returns failure to the midlayer.
1279 for (i = 0; i < LPFC_MAX_TARGET; i++) {
1280 /* Search for mapped node by target ID */
1282 spin_lock_irq(shost->host_lock);
1283 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1284 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1285 i == ndlp->nlp_sid &&
1291 spin_unlock_irq(shost->host_lock);
1295 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1297 ndlp->rport->dd_data);
1298 if (ret != SUCCESS) {
1299 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1300 "0700 Bus Reset on target %d failed\n",
1307 if (ret != IOCB_TIMEDOUT)
1308 lpfc_release_scsi_buf(phba, lpfc_cmd);
1316 * All outstanding txcmplq I/Os should have been aborted by
1317 * the targets. Unfortunately, some targets do not abide by
1318 * this forcing the driver to double check.
1320 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1322 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1323 0, 0, LPFC_CTX_HOST);
1326 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1329 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1332 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1336 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1337 "0715 Bus Reset I/O flush failure: "
1338 "cnt x%x left x%x\n", cnt, i);
1342 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1343 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1349 lpfc_slave_alloc(struct scsi_device *sdev)
1351 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1352 struct lpfc_hba *phba = vport->phba;
1353 struct lpfc_scsi_buf *scsi_buf = NULL;
1354 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1355 uint32_t total = 0, i;
1356 uint32_t num_to_alloc = 0;
1357 unsigned long flags;
1359 if (!rport || fc_remote_port_chkready(rport))
1362 sdev->hostdata = rport->dd_data;
1365 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1366 * available list of scsi buffers. Don't allocate more than the
1367 * HBA limit conveyed to the midlayer via the host structure. The
1368 * formula accounts for the lun_queue_depth + error handlers + 1
1369 * extra. This list of scsi bufs exists for the lifetime of the driver.
1371 total = phba->total_scsi_bufs;
1372 num_to_alloc = vport->cfg_lun_queue_depth + 2;
1374 /* Allow some exchanges to be available always to complete discovery */
1375 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1376 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1377 "0704 At limitation of %d preallocated "
1378 "command buffers\n", total);
1380 /* Allow some exchanges to be available always to complete discovery */
1381 } else if (total + num_to_alloc >
1382 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1383 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1384 "0705 Allocation request of %d "
1385 "command buffers will exceed max of %d. "
1386 "Reducing allocation request to %d.\n",
1387 num_to_alloc, phba->cfg_hba_queue_depth,
1388 (phba->cfg_hba_queue_depth - total));
1389 num_to_alloc = phba->cfg_hba_queue_depth - total;
1392 for (i = 0; i < num_to_alloc; i++) {
1393 scsi_buf = lpfc_new_scsi_buf(vport);
1395 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1396 "0706 Failed to allocate "
1397 "command buffer\n");
1401 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1402 phba->total_scsi_bufs++;
1403 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1404 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1410 lpfc_slave_configure(struct scsi_device *sdev)
1412 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1413 struct lpfc_hba *phba = vport->phba;
1414 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1416 if (sdev->tagged_supported)
1417 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1419 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1422 * Initialize the fc transport attributes for the target
1423 * containing this scsi device. Also note that the driver's
1424 * target pointer is stored in the starget_data for the
1425 * driver's sysfs entry point functions.
1427 rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1429 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1430 lpfc_sli_poll_fcp_ring(phba);
1431 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1432 lpfc_poll_rearm_timer(phba);
1439 lpfc_slave_destroy(struct scsi_device *sdev)
1441 sdev->hostdata = NULL;
1446 struct scsi_host_template lpfc_template = {
1447 .module = THIS_MODULE,
1448 .name = LPFC_DRIVER_NAME,
1450 .queuecommand = lpfc_queuecommand,
1451 .eh_abort_handler = lpfc_abort_handler,
1452 .eh_device_reset_handler= lpfc_device_reset_handler,
1453 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1454 .slave_alloc = lpfc_slave_alloc,
1455 .slave_configure = lpfc_slave_configure,
1456 .slave_destroy = lpfc_slave_destroy,
1457 .scan_finished = lpfc_scan_finished,
1459 .sg_tablesize = LPFC_SG_SEG_CNT,
1460 .use_sg_chaining = ENABLE_SG_CHAINING,
1461 .cmd_per_lun = LPFC_CMD_PER_LUN,
1462 .use_clustering = ENABLE_CLUSTERING,
1463 .shost_attrs = lpfc_hba_attrs,
1464 .max_sectors = 0xFFFF,
1467 struct scsi_host_template lpfc_vport_template = {
1468 .module = THIS_MODULE,
1469 .name = LPFC_DRIVER_NAME,
1471 .queuecommand = lpfc_queuecommand,
1472 .eh_abort_handler = lpfc_abort_handler,
1473 .eh_device_reset_handler= lpfc_device_reset_handler,
1474 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1475 .slave_alloc = lpfc_slave_alloc,
1476 .slave_configure = lpfc_slave_configure,
1477 .slave_destroy = lpfc_slave_destroy,
1478 .scan_finished = lpfc_scan_finished,
1480 .sg_tablesize = LPFC_SG_SEG_CNT,
1481 .cmd_per_lun = LPFC_CMD_PER_LUN,
1482 .use_clustering = ENABLE_CLUSTERING,
1483 .use_sg_chaining = ENABLE_SG_CHAINING,
1484 .shost_attrs = lpfc_vport_attrs,
1485 .max_sectors = 0xFFFF,