1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2009 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 *******************************************************************/
21 #include <linux/pci.h>
22 #include <linux/slab.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25 #include <asm/unaligned.h>
27 #include <scsi/scsi.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/scsi_eh.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_tcq.h>
32 #include <scsi/scsi_transport_fc.h>
34 #include "lpfc_version.h"
38 #include "lpfc_sli4.h"
40 #include "lpfc_disc.h"
41 #include "lpfc_scsi.h"
43 #include "lpfc_logmsg.h"
44 #include "lpfc_crtn.h"
45 #include "lpfc_vport.h"
47 #define LPFC_RESET_WAIT 2
48 #define LPFC_ABORT_WAIT 2
52 static char *dif_op_str[] = {
54 "SCSI_PROT_READ_INSERT",
55 "SCSI_PROT_WRITE_STRIP",
56 "SCSI_PROT_READ_STRIP",
57 "SCSI_PROT_WRITE_INSERT",
58 "SCSI_PROT_READ_PASS",
59 "SCSI_PROT_WRITE_PASS",
62 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
64 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
67 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
70 struct scatterlist *sgde = scsi_sglist(cmnd);
72 if (!_dump_buf_data) {
73 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
74 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
81 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
82 "9051 BLKGRD: ERROR: data scatterlist is null\n");
86 dst = (void *) _dump_buf_data;
89 memcpy(dst, src, sgde->length);
96 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
99 struct scatterlist *sgde = scsi_prot_sglist(cmnd);
101 if (!_dump_buf_dif) {
102 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
103 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
109 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
110 "9053 BLKGRD: ERROR: prot scatterlist is null\n");
117 memcpy(dst, src, sgde->length);
119 sgde = sg_next(sgde);
124 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
125 * @phba: Pointer to HBA object.
126 * @lpfc_cmd: lpfc scsi command object pointer.
128 * This function is called from the lpfc_prep_task_mgmt_cmd function to
129 * set the last bit in the response sge entry.
132 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
133 struct lpfc_scsi_buf *lpfc_cmd)
135 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
138 sgl->word2 = le32_to_cpu(sgl->word2);
139 bf_set(lpfc_sli4_sge_last, sgl, 1);
140 sgl->word2 = cpu_to_le32(sgl->word2);
145 * lpfc_update_stats - Update statistical data for the command completion
146 * @phba: Pointer to HBA object.
147 * @lpfc_cmd: lpfc scsi command object pointer.
149 * This function is called when there is a command completion and this
150 * function updates the statistical data for the command completion.
153 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
155 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
156 struct lpfc_nodelist *pnode = rdata->pnode;
157 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
159 struct Scsi_Host *shost = cmd->device->host;
160 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
161 unsigned long latency;
167 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
169 spin_lock_irqsave(shost->host_lock, flags);
170 if (!vport->stat_data_enabled ||
171 vport->stat_data_blocked ||
173 (phba->bucket_type == LPFC_NO_BUCKET)) {
174 spin_unlock_irqrestore(shost->host_lock, flags);
178 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
179 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
181 /* check array subscript bounds */
184 else if (i >= LPFC_MAX_BUCKET_COUNT)
185 i = LPFC_MAX_BUCKET_COUNT - 1;
187 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
188 if (latency <= (phba->bucket_base +
189 ((1<<i)*phba->bucket_step)))
193 pnode->lat_data[i].cmd_count++;
194 spin_unlock_irqrestore(shost->host_lock, flags);
198 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
199 * @phba: Pointer to HBA context object.
200 * @vport: Pointer to vport object.
201 * @ndlp: Pointer to FC node associated with the target.
202 * @lun: Lun number of the scsi device.
203 * @old_val: Old value of the queue depth.
204 * @new_val: New value of the queue depth.
206 * This function sends an event to the mgmt application indicating
207 * there is a change in the scsi device queue depth.
210 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
211 struct lpfc_vport *vport,
212 struct lpfc_nodelist *ndlp,
217 struct lpfc_fast_path_event *fast_path_evt;
220 fast_path_evt = lpfc_alloc_fast_evt(phba);
224 fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
226 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
227 LPFC_EVENT_VARQUEDEPTH;
229 /* Report all luns with change in queue depth */
230 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
231 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
232 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
233 &ndlp->nlp_portname, sizeof(struct lpfc_name));
234 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
235 &ndlp->nlp_nodename, sizeof(struct lpfc_name));
238 fast_path_evt->un.queue_depth_evt.oldval = old_val;
239 fast_path_evt->un.queue_depth_evt.newval = new_val;
240 fast_path_evt->vport = vport;
242 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
243 spin_lock_irqsave(&phba->hbalock, flags);
244 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
245 spin_unlock_irqrestore(&phba->hbalock, flags);
246 lpfc_worker_wake_up(phba);
252 * lpfc_change_queue_depth - Alter scsi device queue depth
253 * @sdev: Pointer the scsi device on which to change the queue depth.
254 * @qdepth: New queue depth to set the sdev to.
255 * @reason: The reason for the queue depth change.
257 * This function is called by the midlayer and the LLD to alter the queue
258 * depth for a scsi device. This function sets the queue depth to the new
259 * value and sends an event out to log the queue depth change.
262 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
264 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
265 struct lpfc_hba *phba = vport->phba;
266 struct lpfc_rport_data *rdata;
267 unsigned long new_queue_depth, old_queue_depth;
269 old_queue_depth = sdev->queue_depth;
270 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
271 new_queue_depth = sdev->queue_depth;
272 rdata = sdev->hostdata;
274 lpfc_send_sdev_queuedepth_change_event(phba, vport,
275 rdata->pnode, sdev->lun,
278 return sdev->queue_depth;
282 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
283 * @phba: The Hba for which this call is being executed.
285 * This routine is called when there is resource error in driver or firmware.
286 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
287 * posts at most 1 event each second. This routine wakes up worker thread of
288 * @phba to process WORKER_RAM_DOWN_EVENT event.
290 * This routine should be called with no lock held.
293 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
298 spin_lock_irqsave(&phba->hbalock, flags);
299 atomic_inc(&phba->num_rsrc_err);
300 phba->last_rsrc_error_time = jiffies;
302 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
303 spin_unlock_irqrestore(&phba->hbalock, flags);
307 phba->last_ramp_down_time = jiffies;
309 spin_unlock_irqrestore(&phba->hbalock, flags);
311 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
312 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
314 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
315 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
318 lpfc_worker_wake_up(phba);
323 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
324 * @phba: The Hba for which this call is being executed.
326 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
327 * post at most 1 event every 5 minute after last_ramp_up_time or
328 * last_rsrc_error_time. This routine wakes up worker thread of @phba
329 * to process WORKER_RAM_DOWN_EVENT event.
331 * This routine should be called with no lock held.
334 lpfc_rampup_queue_depth(struct lpfc_vport *vport,
335 uint32_t queue_depth)
338 struct lpfc_hba *phba = vport->phba;
340 atomic_inc(&phba->num_cmd_success);
342 if (vport->cfg_lun_queue_depth <= queue_depth)
344 spin_lock_irqsave(&phba->hbalock, flags);
345 if (time_before(jiffies,
346 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
348 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
349 spin_unlock_irqrestore(&phba->hbalock, flags);
352 phba->last_ramp_up_time = jiffies;
353 spin_unlock_irqrestore(&phba->hbalock, flags);
355 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
356 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
358 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
359 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
362 lpfc_worker_wake_up(phba);
367 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
368 * @phba: The Hba for which this call is being executed.
370 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
371 * thread.This routine reduces queue depth for all scsi device on each vport
372 * associated with @phba.
375 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
377 struct lpfc_vport **vports;
378 struct Scsi_Host *shost;
379 struct scsi_device *sdev;
380 unsigned long new_queue_depth;
381 unsigned long num_rsrc_err, num_cmd_success;
384 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
385 num_cmd_success = atomic_read(&phba->num_cmd_success);
387 vports = lpfc_create_vport_work_array(phba);
389 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
390 shost = lpfc_shost_from_vport(vports[i]);
391 shost_for_each_device(sdev, shost) {
393 sdev->queue_depth * num_rsrc_err /
394 (num_rsrc_err + num_cmd_success);
395 if (!new_queue_depth)
396 new_queue_depth = sdev->queue_depth - 1;
398 new_queue_depth = sdev->queue_depth -
400 lpfc_change_queue_depth(sdev, new_queue_depth,
401 SCSI_QDEPTH_DEFAULT);
404 lpfc_destroy_vport_work_array(phba, vports);
405 atomic_set(&phba->num_rsrc_err, 0);
406 atomic_set(&phba->num_cmd_success, 0);
410 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
411 * @phba: The Hba for which this call is being executed.
413 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker
414 * thread.This routine increases queue depth for all scsi device on each vport
415 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
416 * num_cmd_success to zero.
419 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
421 struct lpfc_vport **vports;
422 struct Scsi_Host *shost;
423 struct scsi_device *sdev;
426 vports = lpfc_create_vport_work_array(phba);
428 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
429 shost = lpfc_shost_from_vport(vports[i]);
430 shost_for_each_device(sdev, shost) {
431 if (vports[i]->cfg_lun_queue_depth <=
434 lpfc_change_queue_depth(sdev,
436 SCSI_QDEPTH_RAMP_UP);
439 lpfc_destroy_vport_work_array(phba, vports);
440 atomic_set(&phba->num_rsrc_err, 0);
441 atomic_set(&phba->num_cmd_success, 0);
445 * lpfc_scsi_dev_block - set all scsi hosts to block state
446 * @phba: Pointer to HBA context object.
448 * This function walks vport list and set each SCSI host to block state
449 * by invoking fc_remote_port_delete() routine. This function is invoked
450 * with EEH when device's PCI slot has been permanently disabled.
453 lpfc_scsi_dev_block(struct lpfc_hba *phba)
455 struct lpfc_vport **vports;
456 struct Scsi_Host *shost;
457 struct scsi_device *sdev;
458 struct fc_rport *rport;
461 vports = lpfc_create_vport_work_array(phba);
463 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
464 shost = lpfc_shost_from_vport(vports[i]);
465 shost_for_each_device(sdev, shost) {
466 rport = starget_to_rport(scsi_target(sdev));
467 fc_remote_port_delete(rport);
470 lpfc_destroy_vport_work_array(phba, vports);
474 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
475 * @vport: The virtual port for which this call being executed.
476 * @num_to_allocate: The requested number of buffers to allocate.
478 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
479 * the scsi buffer contains all the necessary information needed to initiate
480 * a SCSI I/O. The non-DMAable buffer region contains information to build
481 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
482 * and the initial BPL. In addition to allocating memory, the FCP CMND and
483 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
486 * int - number of scsi buffers that were allocated.
487 * 0 = failure, less than num_to_alloc is a partial failure.
490 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
492 struct lpfc_hba *phba = vport->phba;
493 struct lpfc_scsi_buf *psb;
494 struct ulp_bde64 *bpl;
496 dma_addr_t pdma_phys_fcp_cmd;
497 dma_addr_t pdma_phys_fcp_rsp;
498 dma_addr_t pdma_phys_bpl;
502 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
503 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
508 * Get memory from the pci pool to map the virt space to pci
509 * bus space for an I/O. The DMA buffer includes space for the
510 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
511 * necessary to support the sg_tablesize.
513 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
514 GFP_KERNEL, &psb->dma_handle);
520 /* Initialize virtual ptrs to dma_buf region. */
521 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
523 /* Allocate iotag for psb->cur_iocbq. */
524 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
526 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
527 psb->data, psb->dma_handle);
531 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
533 psb->fcp_cmnd = psb->data;
534 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
535 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
536 sizeof(struct fcp_rsp);
538 /* Initialize local short-hand pointers. */
540 pdma_phys_fcp_cmd = psb->dma_handle;
541 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
542 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
543 sizeof(struct fcp_rsp);
546 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
547 * are sg list bdes. Initialize the first two and leave the
548 * rest for queuecommand.
550 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
551 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
552 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
553 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
554 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
556 /* Setup the physical region for the FCP RSP */
557 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
558 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
559 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
560 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
561 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
564 * Since the IOCB for the FCP I/O is built into this
565 * lpfc_scsi_buf, initialize it with all known data now.
567 iocb = &psb->cur_iocbq.iocb;
568 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
569 if ((phba->sli_rev == 3) &&
570 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
571 /* fill in immediate fcp command BDE */
572 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
573 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
574 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
576 iocb->un.fcpi64.bdl.addrHigh = 0;
577 iocb->ulpBdeCount = 0;
579 /* fill in responce BDE */
580 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
582 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
583 sizeof(struct fcp_rsp);
584 iocb->unsli3.fcp_ext.rbde.addrLow =
585 putPaddrLow(pdma_phys_fcp_rsp);
586 iocb->unsli3.fcp_ext.rbde.addrHigh =
587 putPaddrHigh(pdma_phys_fcp_rsp);
589 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
590 iocb->un.fcpi64.bdl.bdeSize =
591 (2 * sizeof(struct ulp_bde64));
592 iocb->un.fcpi64.bdl.addrLow =
593 putPaddrLow(pdma_phys_bpl);
594 iocb->un.fcpi64.bdl.addrHigh =
595 putPaddrHigh(pdma_phys_bpl);
596 iocb->ulpBdeCount = 1;
599 iocb->ulpClass = CLASS3;
600 psb->status = IOSTAT_SUCCESS;
601 /* Put it back into the SCSI buffer list */
602 psb->cur_iocbq.context1 = psb;
603 lpfc_release_scsi_buf_s3(phba, psb);
611 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
612 * @phba: pointer to lpfc hba data structure.
613 * @axri: pointer to the fcp xri abort wcqe structure.
615 * This routine is invoked by the worker thread to process a SLI4 fast-path
619 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
620 struct sli4_wcqe_xri_aborted *axri)
622 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
623 struct lpfc_scsi_buf *psb, *next_psb;
624 unsigned long iflag = 0;
625 struct lpfc_iocbq *iocbq;
627 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
629 spin_lock_irqsave(&phba->hbalock, iflag);
630 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
631 list_for_each_entry_safe(psb, next_psb,
632 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
633 if (psb->cur_iocbq.sli4_xritag == xri) {
634 list_del(&psb->list);
636 psb->status = IOSTAT_SUCCESS;
638 &phba->sli4_hba.abts_scsi_buf_list_lock);
639 spin_unlock_irqrestore(&phba->hbalock, iflag);
640 lpfc_release_scsi_buf_s4(phba, psb);
644 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
645 for (i = 1; i <= phba->sli.last_iotag; i++) {
646 iocbq = phba->sli.iocbq_lookup[i];
648 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
649 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
651 if (iocbq->sli4_xritag != xri)
653 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
655 spin_unlock_irqrestore(&phba->hbalock, iflag);
657 lpfc_worker_wake_up(phba);
661 spin_unlock_irqrestore(&phba->hbalock, iflag);
665 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
666 * @phba: pointer to lpfc hba data structure.
668 * This routine walks the list of scsi buffers that have been allocated and
669 * repost them to the HBA by using SGL block post. This is needed after a
670 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
671 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
672 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
674 * Returns: 0 = success, non-zero failure.
677 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
679 struct lpfc_scsi_buf *psb;
680 int index, status, bcnt = 0, rcnt = 0, rc = 0;
683 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
684 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
686 /* Remove from SCSI buffer list */
687 list_del(&psb->list);
688 /* Add it to a local SCSI buffer list */
689 list_add_tail(&psb->list, &sblist);
690 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
695 /* A hole present in the XRI array, need to skip */
698 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
699 /* End of XRI array for SCSI buffer, complete */
702 /* Continue until collect up to a nembed page worth of sgls */
705 /* Now, post the SCSI buffer list sgls as a block */
706 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
707 /* Reset SCSI buffer count for next round of posting */
709 while (!list_empty(&sblist)) {
710 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
713 /* Put this back on the abort scsi list */
718 psb->status = IOSTAT_SUCCESS;
720 /* Put it back into the SCSI buffer list */
721 lpfc_release_scsi_buf_s4(phba, psb);
728 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
729 * @vport: The virtual port for which this call being executed.
730 * @num_to_allocate: The requested number of buffers to allocate.
732 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
733 * the scsi buffer contains all the necessary information needed to initiate
737 * int - number of scsi buffers that were allocated.
738 * 0 = failure, less than num_to_alloc is a partial failure.
741 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
743 struct lpfc_hba *phba = vport->phba;
744 struct lpfc_scsi_buf *psb;
745 struct sli4_sge *sgl;
747 dma_addr_t pdma_phys_fcp_cmd;
748 dma_addr_t pdma_phys_fcp_rsp;
749 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
750 uint16_t iotag, last_xritag = NO_XRI;
751 int status = 0, index;
753 int non_sequential_xri = 0;
756 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
757 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
762 * Get memory from the pci pool to map the virt space to pci bus
763 * space for an I/O. The DMA buffer includes space for the
764 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
765 * necessary to support the sg_tablesize.
767 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
768 GFP_KERNEL, &psb->dma_handle);
774 /* Initialize virtual ptrs to dma_buf region. */
775 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
777 /* Allocate iotag for psb->cur_iocbq. */
778 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
780 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
781 psb->data, psb->dma_handle);
786 psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
787 if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
788 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
789 psb->data, psb->dma_handle);
793 if (last_xritag != NO_XRI
794 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
795 non_sequential_xri = 1;
797 list_add_tail(&psb->list, &sblist);
798 last_xritag = psb->cur_iocbq.sli4_xritag;
800 index = phba->sli4_hba.scsi_xri_cnt++;
801 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
803 psb->fcp_bpl = psb->data;
804 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
805 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
806 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
807 sizeof(struct fcp_cmnd));
809 /* Initialize local short-hand pointers. */
810 sgl = (struct sli4_sge *)psb->fcp_bpl;
811 pdma_phys_bpl = psb->dma_handle;
813 (psb->dma_handle + phba->cfg_sg_dma_buf_size)
814 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
815 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
818 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
819 * are sg list bdes. Initialize the first two and leave the
820 * rest for queuecommand.
822 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
823 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
824 bf_set(lpfc_sli4_sge_last, sgl, 0);
825 sgl->word2 = cpu_to_le32(sgl->word2);
826 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
829 /* Setup the physical region for the FCP RSP */
830 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
831 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
832 bf_set(lpfc_sli4_sge_last, sgl, 1);
833 sgl->word2 = cpu_to_le32(sgl->word2);
834 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
837 * Since the IOCB for the FCP I/O is built into this
838 * lpfc_scsi_buf, initialize it with all known data now.
840 iocb = &psb->cur_iocbq.iocb;
841 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
842 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
843 /* setting the BLP size to 2 * sizeof BDE may not be correct.
844 * We are setting the bpl to point to out sgl. An sgl's
845 * entries are 16 bytes, a bpl entries are 12 bytes.
847 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
848 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
849 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
850 iocb->ulpBdeCount = 1;
852 iocb->ulpClass = CLASS3;
853 psb->cur_iocbq.context1 = psb;
854 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
855 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
858 psb->dma_phys_bpl = pdma_phys_bpl;
859 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
860 if (non_sequential_xri) {
861 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
863 psb->cur_iocbq.sli4_xritag);
865 /* Put this back on the abort scsi list */
869 psb->status = IOSTAT_SUCCESS;
871 /* Put it back into the SCSI buffer list */
872 lpfc_release_scsi_buf_s4(phba, psb);
877 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
878 /* Reset SCSI buffer count for next round of posting */
879 while (!list_empty(&sblist)) {
880 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
883 /* Put this back on the abort scsi list */
887 psb->status = IOSTAT_SUCCESS;
889 /* Put it back into the SCSI buffer list */
890 lpfc_release_scsi_buf_s4(phba, psb);
894 return bcnt + non_sequential_xri;
898 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
899 * @vport: The virtual port for which this call being executed.
900 * @num_to_allocate: The requested number of buffers to allocate.
902 * This routine wraps the actual SCSI buffer allocator function pointer from
903 * the lpfc_hba struct.
906 * int - number of scsi buffers that were allocated.
907 * 0 = failure, less than num_to_alloc is a partial failure.
910 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
912 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
916 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
917 * @phba: The HBA for which this call is being executed.
919 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
920 * and returns to caller.
924 * Pointer to lpfc_scsi_buf - Success
926 static struct lpfc_scsi_buf*
927 lpfc_get_scsi_buf(struct lpfc_hba * phba)
929 struct lpfc_scsi_buf * lpfc_cmd = NULL;
930 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
931 unsigned long iflag = 0;
933 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
934 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
936 lpfc_cmd->seg_cnt = 0;
937 lpfc_cmd->nonsg_phys = 0;
938 lpfc_cmd->prot_seg_cnt = 0;
940 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
945 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
946 * @phba: The Hba for which this call is being executed.
947 * @psb: The scsi buffer which is being released.
949 * This routine releases @psb scsi buffer by adding it to tail of @phba
950 * lpfc_scsi_buf_list list.
953 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
955 unsigned long iflag = 0;
957 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
959 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
960 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
964 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
965 * @phba: The Hba for which this call is being executed.
966 * @psb: The scsi buffer which is being released.
968 * This routine releases @psb scsi buffer by adding it to tail of @phba
969 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
970 * and cannot be reused for at least RA_TOV amount of time if it was
974 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
976 unsigned long iflag = 0;
978 if (psb->exch_busy) {
979 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
982 list_add_tail(&psb->list,
983 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
984 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
988 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
990 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
991 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
996 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
997 * @phba: The Hba for which this call is being executed.
998 * @psb: The scsi buffer which is being released.
1000 * This routine releases @psb scsi buffer by adding it to tail of @phba
1001 * lpfc_scsi_buf_list list.
1004 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1007 phba->lpfc_release_scsi_buf(phba, psb);
1011 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1012 * @phba: The Hba for which this call is being executed.
1013 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1015 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1016 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1017 * through sg elements and format the bdea. This routine also initializes all
1018 * IOCB fields which are dependent on scsi command request buffer.
1025 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1027 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1028 struct scatterlist *sgel = NULL;
1029 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1030 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1031 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1032 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1033 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1034 dma_addr_t physaddr;
1035 uint32_t num_bde = 0;
1036 int nseg, datadir = scsi_cmnd->sc_data_direction;
1039 * There are three possibilities here - use scatter-gather segment, use
1040 * the single mapping, or neither. Start the lpfc command prep by
1041 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1045 if (scsi_sg_count(scsi_cmnd)) {
1047 * The driver stores the segment count returned from pci_map_sg
1048 * because this a count of dma-mappings used to map the use_sg
1049 * pages. They are not guaranteed to be the same for those
1050 * architectures that implement an IOMMU.
1053 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1054 scsi_sg_count(scsi_cmnd), datadir);
1055 if (unlikely(!nseg))
1058 lpfc_cmd->seg_cnt = nseg;
1059 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1060 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1061 "9064 BLKGRD: %s: Too many sg segments from "
1062 "dma_map_sg. Config %d, seg_cnt %d\n",
1063 __func__, phba->cfg_sg_seg_cnt,
1065 scsi_dma_unmap(scsi_cmnd);
1070 * The driver established a maximum scatter-gather segment count
1071 * during probe that limits the number of sg elements in any
1072 * single scsi command. Just run through the seg_cnt and format
1074 * When using SLI-3 the driver will try to fit all the BDEs into
1075 * the IOCB. If it can't then the BDEs get added to a BPL as it
1076 * does for SLI-2 mode.
1078 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1079 physaddr = sg_dma_address(sgel);
1080 if (phba->sli_rev == 3 &&
1081 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1082 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1083 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1084 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1085 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1086 data_bde->addrLow = putPaddrLow(physaddr);
1087 data_bde->addrHigh = putPaddrHigh(physaddr);
1090 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1091 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1092 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1094 le32_to_cpu(putPaddrLow(physaddr));
1096 le32_to_cpu(putPaddrHigh(physaddr));
1103 * Finish initializing those IOCB fields that are dependent on the
1104 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1105 * explicitly reinitialized and for SLI-3 the extended bde count is
1106 * explicitly reinitialized since all iocb memory resources are reused.
1108 if (phba->sli_rev == 3 &&
1109 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1110 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1111 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1113 * The extended IOCB format can only fit 3 BDE or a BPL.
1114 * This I/O has more than 3 BDE so the 1st data bde will
1115 * be a BPL that is filled in here.
1117 physaddr = lpfc_cmd->dma_handle;
1118 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1119 data_bde->tus.f.bdeSize = (num_bde *
1120 sizeof(struct ulp_bde64));
1121 physaddr += (sizeof(struct fcp_cmnd) +
1122 sizeof(struct fcp_rsp) +
1123 (2 * sizeof(struct ulp_bde64)));
1124 data_bde->addrHigh = putPaddrHigh(physaddr);
1125 data_bde->addrLow = putPaddrLow(physaddr);
1126 /* ebde count includes the responce bde and data bpl */
1127 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1129 /* ebde count includes the responce bde and data bdes */
1130 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1133 iocb_cmd->un.fcpi64.bdl.bdeSize =
1134 ((num_bde + 2) * sizeof(struct ulp_bde64));
1135 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1137 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1140 * Due to difference in data length between DIF/non-DIF paths,
1141 * we need to set word 4 of IOCB here
1143 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1148 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1149 * @sc: The SCSI command to examine
1150 * @txopt: (out) BlockGuard operation for transmitted data
1151 * @rxopt: (out) BlockGuard operation for received data
1153 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1157 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1158 uint8_t *txop, uint8_t *rxop)
1160 uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1163 if (guard_type == SHOST_DIX_GUARD_IP) {
1164 switch (scsi_get_prot_op(sc)) {
1165 case SCSI_PROT_READ_INSERT:
1166 case SCSI_PROT_WRITE_STRIP:
1167 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1168 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1171 case SCSI_PROT_READ_STRIP:
1172 case SCSI_PROT_WRITE_INSERT:
1173 *txop = BG_OP_IN_NODIF_OUT_CRC;
1174 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1177 case SCSI_PROT_READ_PASS:
1178 case SCSI_PROT_WRITE_PASS:
1179 *txop = BG_OP_IN_CSUM_OUT_CRC;
1180 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1183 case SCSI_PROT_NORMAL:
1185 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1186 "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1187 scsi_get_prot_op(sc), guard_type);
1192 } else if (guard_type == SHOST_DIX_GUARD_CRC) {
1193 switch (scsi_get_prot_op(sc)) {
1194 case SCSI_PROT_READ_STRIP:
1195 case SCSI_PROT_WRITE_INSERT:
1196 *txop = BG_OP_IN_NODIF_OUT_CRC;
1197 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1200 case SCSI_PROT_READ_PASS:
1201 case SCSI_PROT_WRITE_PASS:
1202 *txop = BG_OP_IN_CRC_OUT_CRC;
1203 *rxop = BG_OP_IN_CRC_OUT_CRC;
1206 case SCSI_PROT_READ_INSERT:
1207 case SCSI_PROT_WRITE_STRIP:
1208 case SCSI_PROT_NORMAL:
1210 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1211 "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1212 scsi_get_prot_op(sc), guard_type);
1217 /* unsupported format */
1224 struct scsi_dif_tuple {
1225 __be16 guard_tag; /* Checksum */
1226 __be16 app_tag; /* Opaque storage */
1227 __be32 ref_tag; /* Target LBA or indirect LBA */
1230 static inline unsigned
1231 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1233 return sc->device->sector_size;
1237 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
1238 * @sc: in: SCSI command
1239 * @apptagmask: out: app tag mask
1240 * @apptagval: out: app tag value
1241 * @reftag: out: ref tag (reference tag)
1244 * Extract DIF parameters from the command if possible. Otherwise,
1245 * use default parameters.
1249 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
1250 uint16_t *apptagval, uint32_t *reftag)
1252 struct scsi_dif_tuple *spt;
1253 unsigned char op = scsi_get_prot_op(sc);
1254 unsigned int protcnt = scsi_prot_sg_count(sc);
1257 if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1258 op == SCSI_PROT_WRITE_PASS)) {
1261 spt = page_address(sg_page(scsi_prot_sglist(sc))) +
1262 scsi_prot_sglist(sc)[0].offset;
1265 *reftag = cpu_to_be32(spt->ref_tag);
1268 /* SBC defines ref tag to be lower 32bits of LBA */
1269 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
1276 * This function sets up buffer list for protection groups of
1277 * type LPFC_PG_TYPE_NO_DIF
1279 * This is usually used when the HBA is instructed to generate
1280 * DIFs and insert them into data stream (or strip DIF from
1281 * incoming data stream)
1283 * The buffer list consists of just one protection group described
1285 * +-------------------------+
1286 * start of prot group --> | PDE_5 |
1287 * +-------------------------+
1289 * +-------------------------+
1291 * +-------------------------+
1292 * |more Data BDE's ... (opt)|
1293 * +-------------------------+
1295 * @sc: pointer to scsi command we're working on
1296 * @bpl: pointer to buffer list for protection groups
1297 * @datacnt: number of segments of data that have been dma mapped
1299 * Note: Data s/g buffers have been dma mapped
1302 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1303 struct ulp_bde64 *bpl, int datasegcnt)
1305 struct scatterlist *sgde = NULL; /* s/g data entry */
1306 struct lpfc_pde5 *pde5 = NULL;
1307 struct lpfc_pde6 *pde6 = NULL;
1308 dma_addr_t physaddr;
1309 int i = 0, num_bde = 0, status;
1310 int datadir = sc->sc_data_direction;
1313 uint16_t apptagmask, apptagval;
1316 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1320 /* extract some info from the scsi command for pde*/
1321 blksize = lpfc_cmd_blksize(sc);
1322 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1324 /* setup PDE5 with what we have */
1325 pde5 = (struct lpfc_pde5 *) bpl;
1326 memset(pde5, 0, sizeof(struct lpfc_pde5));
1327 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1328 pde5->reftag = reftag;
1330 /* Endianness conversion if necessary for PDE5 */
1331 pde5->word0 = cpu_to_le32(pde5->word0);
1332 pde5->reftag = cpu_to_le32(pde5->reftag);
1334 /* advance bpl and increment bde count */
1337 pde6 = (struct lpfc_pde6 *) bpl;
1339 /* setup PDE6 with the rest of the info */
1340 memset(pde6, 0, sizeof(struct lpfc_pde6));
1341 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1342 bf_set(pde6_optx, pde6, txop);
1343 bf_set(pde6_oprx, pde6, rxop);
1344 if (datadir == DMA_FROM_DEVICE) {
1345 bf_set(pde6_ce, pde6, 1);
1346 bf_set(pde6_re, pde6, 1);
1347 bf_set(pde6_ae, pde6, 1);
1349 bf_set(pde6_ai, pde6, 1);
1350 bf_set(pde6_apptagval, pde6, apptagval);
1352 /* Endianness conversion if necessary for PDE6 */
1353 pde6->word0 = cpu_to_le32(pde6->word0);
1354 pde6->word1 = cpu_to_le32(pde6->word1);
1355 pde6->word2 = cpu_to_le32(pde6->word2);
1357 /* advance bpl and increment bde count */
1361 /* assumption: caller has already run dma_map_sg on command data */
1362 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1363 physaddr = sg_dma_address(sgde);
1364 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1365 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1366 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1367 if (datadir == DMA_TO_DEVICE)
1368 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1370 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1371 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1381 * This function sets up buffer list for protection groups of
1382 * type LPFC_PG_TYPE_DIF_BUF
1384 * This is usually used when DIFs are in their own buffers,
1385 * separate from the data. The HBA can then by instructed
1386 * to place the DIFs in the outgoing stream. For read operations,
1387 * The HBA could extract the DIFs and place it in DIF buffers.
1389 * The buffer list for this type consists of one or more of the
1390 * protection groups described below:
1391 * +-------------------------+
1392 * start of first prot group --> | PDE_5 |
1393 * +-------------------------+
1395 * +-------------------------+
1396 * | PDE_7 (Prot BDE) |
1397 * +-------------------------+
1399 * +-------------------------+
1400 * |more Data BDE's ... (opt)|
1401 * +-------------------------+
1402 * start of new prot group --> | PDE_5 |
1403 * +-------------------------+
1405 * +-------------------------+
1407 * @sc: pointer to scsi command we're working on
1408 * @bpl: pointer to buffer list for protection groups
1409 * @datacnt: number of segments of data that have been dma mapped
1410 * @protcnt: number of segment of protection data that have been dma mapped
1412 * Note: It is assumed that both data and protection s/g buffers have been
1416 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1417 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1419 struct scatterlist *sgde = NULL; /* s/g data entry */
1420 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1421 struct lpfc_pde5 *pde5 = NULL;
1422 struct lpfc_pde6 *pde6 = NULL;
1423 struct ulp_bde64 *prot_bde = NULL;
1424 dma_addr_t dataphysaddr, protphysaddr;
1425 unsigned short curr_data = 0, curr_prot = 0;
1426 unsigned int split_offset, protgroup_len;
1427 unsigned int protgrp_blks, protgrp_bytes;
1428 unsigned int remainder, subtotal;
1430 int datadir = sc->sc_data_direction;
1431 unsigned char pgdone = 0, alldone = 0;
1434 uint16_t apptagmask, apptagval;
1438 sgpe = scsi_prot_sglist(sc);
1439 sgde = scsi_sglist(sc);
1441 if (!sgpe || !sgde) {
1442 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1443 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1448 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1452 /* extract some info from the scsi command */
1453 blksize = lpfc_cmd_blksize(sc);
1454 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1458 /* setup PDE5 with what we have */
1459 pde5 = (struct lpfc_pde5 *) bpl;
1460 memset(pde5, 0, sizeof(struct lpfc_pde5));
1461 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1462 pde5->reftag = reftag;
1464 /* Endianness conversion if necessary for PDE5 */
1465 pde5->word0 = cpu_to_le32(pde5->word0);
1466 pde5->reftag = cpu_to_le32(pde5->reftag);
1468 /* advance bpl and increment bde count */
1471 pde6 = (struct lpfc_pde6 *) bpl;
1473 /* setup PDE6 with the rest of the info */
1474 memset(pde6, 0, sizeof(struct lpfc_pde6));
1475 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1476 bf_set(pde6_optx, pde6, txop);
1477 bf_set(pde6_oprx, pde6, rxop);
1478 bf_set(pde6_ce, pde6, 1);
1479 bf_set(pde6_re, pde6, 1);
1480 bf_set(pde6_ae, pde6, 1);
1481 bf_set(pde6_ai, pde6, 1);
1482 bf_set(pde6_apptagval, pde6, apptagval);
1484 /* Endianness conversion if necessary for PDE6 */
1485 pde6->word0 = cpu_to_le32(pde6->word0);
1486 pde6->word1 = cpu_to_le32(pde6->word1);
1487 pde6->word2 = cpu_to_le32(pde6->word2);
1489 /* advance bpl and increment bde count */
1493 /* setup the first BDE that points to protection buffer */
1494 prot_bde = (struct ulp_bde64 *) bpl;
1495 protphysaddr = sg_dma_address(sgpe);
1496 prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1497 prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1498 protgroup_len = sg_dma_len(sgpe);
1500 /* must be integer multiple of the DIF block length */
1501 BUG_ON(protgroup_len % 8);
1503 protgrp_blks = protgroup_len / 8;
1504 protgrp_bytes = protgrp_blks * blksize;
1506 prot_bde->tus.f.bdeSize = protgroup_len;
1507 prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
1508 prot_bde->tus.w = le32_to_cpu(bpl->tus.w);
1513 /* setup BDE's for data blocks associated with DIF data */
1515 subtotal = 0; /* total bytes processed for current prot grp */
1518 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1519 "9065 BLKGRD:%s Invalid data segment\n",
1524 dataphysaddr = sg_dma_address(sgde) + split_offset;
1525 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1526 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1528 remainder = sg_dma_len(sgde) - split_offset;
1530 if ((subtotal + remainder) <= protgrp_bytes) {
1531 /* we can use this whole buffer */
1532 bpl->tus.f.bdeSize = remainder;
1535 if ((subtotal + remainder) == protgrp_bytes)
1538 /* must split this buffer with next prot grp */
1539 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1540 split_offset += bpl->tus.f.bdeSize;
1543 subtotal += bpl->tus.f.bdeSize;
1545 if (datadir == DMA_TO_DEVICE)
1546 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1548 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1549 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1557 /* Move to the next s/g segment if possible */
1558 sgde = sg_next(sgde);
1563 if (curr_prot == protcnt) {
1565 } else if (curr_prot < protcnt) {
1566 /* advance to next prot buffer */
1567 sgpe = sg_next(sgpe);
1570 /* update the reference tag */
1571 reftag += protgrp_blks;
1573 /* if we're here, we have a bug */
1574 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1575 "9054 BLKGRD: bug in %s\n", __func__);
1585 * Given a SCSI command that supports DIF, determine composition of protection
1586 * groups involved in setting up buffer lists
1589 * for DIF (for both read and write)
1592 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1594 int ret = LPFC_PG_TYPE_INVALID;
1595 unsigned char op = scsi_get_prot_op(sc);
1598 case SCSI_PROT_READ_STRIP:
1599 case SCSI_PROT_WRITE_INSERT:
1600 ret = LPFC_PG_TYPE_NO_DIF;
1602 case SCSI_PROT_READ_INSERT:
1603 case SCSI_PROT_WRITE_STRIP:
1604 case SCSI_PROT_READ_PASS:
1605 case SCSI_PROT_WRITE_PASS:
1606 ret = LPFC_PG_TYPE_DIF_BUF;
1609 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1610 "9021 Unsupported protection op:%d\n", op);
1618 * This is the protection/DIF aware version of
1619 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1620 * two functions eventually, but for now, it's here
1623 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1624 struct lpfc_scsi_buf *lpfc_cmd)
1626 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1627 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1628 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1629 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1630 uint32_t num_bde = 0;
1631 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1632 int prot_group_type = 0;
1637 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1638 * fcp_rsp regions to the first data bde entry
1641 if (scsi_sg_count(scsi_cmnd)) {
1643 * The driver stores the segment count returned from pci_map_sg
1644 * because this a count of dma-mappings used to map the use_sg
1645 * pages. They are not guaranteed to be the same for those
1646 * architectures that implement an IOMMU.
1648 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1649 scsi_sglist(scsi_cmnd),
1650 scsi_sg_count(scsi_cmnd), datadir);
1651 if (unlikely(!datasegcnt))
1654 lpfc_cmd->seg_cnt = datasegcnt;
1655 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1656 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1657 "9067 BLKGRD: %s: Too many sg segments"
1658 " from dma_map_sg. Config %d, seg_cnt"
1660 __func__, phba->cfg_sg_seg_cnt,
1662 scsi_dma_unmap(scsi_cmnd);
1666 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1668 switch (prot_group_type) {
1669 case LPFC_PG_TYPE_NO_DIF:
1670 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1672 /* we should have 2 or more entries in buffer list */
1676 case LPFC_PG_TYPE_DIF_BUF:{
1678 * This type indicates that protection buffers are
1679 * passed to the driver, so that needs to be prepared
1682 protsegcnt = dma_map_sg(&phba->pcidev->dev,
1683 scsi_prot_sglist(scsi_cmnd),
1684 scsi_prot_sg_count(scsi_cmnd), datadir);
1685 if (unlikely(!protsegcnt)) {
1686 scsi_dma_unmap(scsi_cmnd);
1690 lpfc_cmd->prot_seg_cnt = protsegcnt;
1691 if (lpfc_cmd->prot_seg_cnt
1692 > phba->cfg_prot_sg_seg_cnt) {
1693 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1694 "9068 BLKGRD: %s: Too many prot sg "
1695 "segments from dma_map_sg. Config %d,"
1696 "prot_seg_cnt %d\n", __func__,
1697 phba->cfg_prot_sg_seg_cnt,
1698 lpfc_cmd->prot_seg_cnt);
1699 dma_unmap_sg(&phba->pcidev->dev,
1700 scsi_prot_sglist(scsi_cmnd),
1701 scsi_prot_sg_count(scsi_cmnd),
1703 scsi_dma_unmap(scsi_cmnd);
1707 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1708 datasegcnt, protsegcnt);
1709 /* we should have 3 or more entries in buffer list */
1714 case LPFC_PG_TYPE_INVALID:
1716 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1717 "9022 Unexpected protection group %i\n",
1724 * Finish initializing those IOCB fields that are dependent on the
1725 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
1726 * reinitialized since all iocb memory resources are used many times
1727 * for transmit, receive, and continuation bpl's.
1729 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1730 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1731 iocb_cmd->ulpBdeCount = 1;
1732 iocb_cmd->ulpLe = 1;
1734 fcpdl = scsi_bufflen(scsi_cmnd);
1736 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1738 * We are in DIF Type 1 mode
1739 * Every data block has a 8 byte DIF (trailer)
1740 * attached to it. Must ajust FCP data length
1742 blksize = lpfc_cmd_blksize(scsi_cmnd);
1743 diflen = (fcpdl / blksize) * 8;
1746 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1749 * Due to difference in data length between DIF/non-DIF paths,
1750 * we need to set word 4 of IOCB here
1752 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1756 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1757 "9023 Could not setup all needed BDE's"
1758 "prot_group_type=%d, num_bde=%d\n",
1759 prot_group_type, num_bde);
1764 * This function checks for BlockGuard errors detected by
1765 * the HBA. In case of errors, the ASC/ASCQ fields in the
1766 * sense buffer will be set accordingly, paired with
1767 * ILLEGAL_REQUEST to signal to the kernel that the HBA
1768 * detected corruption.
1771 * 0 - No error found
1772 * 1 - BlockGuard error found
1773 * -1 - Internal error (bad profile, ...etc)
1776 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1777 struct lpfc_iocbq *pIocbOut)
1779 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1780 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1782 uint32_t bghm = bgf->bghm;
1783 uint32_t bgstat = bgf->bgstat;
1784 uint64_t failing_sector = 0;
1786 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1787 " 0x%x lba 0x%llx blk cnt 0x%x "
1788 "bgstat=0x%x bghm=0x%x\n",
1789 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1790 blk_rq_sectors(cmd->request), bgstat, bghm);
1792 spin_lock(&_dump_buf_lock);
1793 if (!_dump_buf_done) {
1794 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
1795 " Data for %u blocks to debugfs\n",
1796 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1797 lpfc_debug_save_data(phba, cmd);
1799 /* If we have a prot sgl, save the DIF buffer */
1800 if (lpfc_prot_group_type(phba, cmd) ==
1801 LPFC_PG_TYPE_DIF_BUF) {
1802 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1803 "Saving DIF for %u blocks to debugfs\n",
1804 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1805 lpfc_debug_save_dif(phba, cmd);
1810 spin_unlock(&_dump_buf_lock);
1812 if (lpfc_bgs_get_invalid_prof(bgstat)) {
1813 cmd->result = ScsiResult(DID_ERROR, 0);
1814 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1815 " BlockGuard profile. bgstat:0x%x\n",
1821 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1822 cmd->result = ScsiResult(DID_ERROR, 0);
1823 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1824 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1830 if (lpfc_bgs_get_guard_err(bgstat)) {
1833 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1835 cmd->result = DRIVER_SENSE << 24
1836 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1837 phba->bg_guard_err_cnt++;
1838 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1839 "9055 BLKGRD: guard_tag error\n");
1842 if (lpfc_bgs_get_reftag_err(bgstat)) {
1845 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1847 cmd->result = DRIVER_SENSE << 24
1848 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1850 phba->bg_reftag_err_cnt++;
1851 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1852 "9056 BLKGRD: ref_tag error\n");
1855 if (lpfc_bgs_get_apptag_err(bgstat)) {
1858 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1860 cmd->result = DRIVER_SENSE << 24
1861 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1863 phba->bg_apptag_err_cnt++;
1864 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1865 "9061 BLKGRD: app_tag error\n");
1868 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1870 * setup sense data descriptor 0 per SPC-4 as an information
1871 * field, and put the failing LBA in it
1873 cmd->sense_buffer[8] = 0; /* Information */
1874 cmd->sense_buffer[9] = 0xa; /* Add. length */
1875 bghm /= cmd->device->sector_size;
1877 failing_sector = scsi_get_lba(cmd);
1878 failing_sector += bghm;
1880 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
1884 /* No error was reported - problem in FW? */
1885 cmd->result = ScsiResult(DID_ERROR, 0);
1886 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1887 "9057 BLKGRD: no errors reported!\n");
1895 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
1896 * @phba: The Hba for which this call is being executed.
1897 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1899 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1900 * field of @lpfc_cmd for device with SLI-4 interface spec.
1907 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1909 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1910 struct scatterlist *sgel = NULL;
1911 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1912 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
1913 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1914 dma_addr_t physaddr;
1915 uint32_t num_bde = 0;
1917 uint32_t dma_offset = 0;
1921 * There are three possibilities here - use scatter-gather segment, use
1922 * the single mapping, or neither. Start the lpfc command prep by
1923 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1926 if (scsi_sg_count(scsi_cmnd)) {
1928 * The driver stores the segment count returned from pci_map_sg
1929 * because this a count of dma-mappings used to map the use_sg
1930 * pages. They are not guaranteed to be the same for those
1931 * architectures that implement an IOMMU.
1934 nseg = scsi_dma_map(scsi_cmnd);
1935 if (unlikely(!nseg))
1938 /* clear the last flag in the fcp_rsp map entry */
1939 sgl->word2 = le32_to_cpu(sgl->word2);
1940 bf_set(lpfc_sli4_sge_last, sgl, 0);
1941 sgl->word2 = cpu_to_le32(sgl->word2);
1944 lpfc_cmd->seg_cnt = nseg;
1945 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1946 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
1947 " %s: Too many sg segments from "
1948 "dma_map_sg. Config %d, seg_cnt %d\n",
1949 __func__, phba->cfg_sg_seg_cnt,
1951 scsi_dma_unmap(scsi_cmnd);
1956 * The driver established a maximum scatter-gather segment count
1957 * during probe that limits the number of sg elements in any
1958 * single scsi command. Just run through the seg_cnt and format
1960 * When using SLI-3 the driver will try to fit all the BDEs into
1961 * the IOCB. If it can't then the BDEs get added to a BPL as it
1962 * does for SLI-2 mode.
1964 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1965 physaddr = sg_dma_address(sgel);
1966 dma_len = sg_dma_len(sgel);
1967 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1968 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1969 if ((num_bde + 1) == nseg)
1970 bf_set(lpfc_sli4_sge_last, sgl, 1);
1972 bf_set(lpfc_sli4_sge_last, sgl, 0);
1973 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1974 sgl->word2 = cpu_to_le32(sgl->word2);
1975 sgl->sge_len = cpu_to_le32(dma_len);
1976 dma_offset += dma_len;
1981 /* clear the last flag in the fcp_rsp map entry */
1982 sgl->word2 = le32_to_cpu(sgl->word2);
1983 bf_set(lpfc_sli4_sge_last, sgl, 1);
1984 sgl->word2 = cpu_to_le32(sgl->word2);
1988 * Finish initializing those IOCB fields that are dependent on the
1989 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1990 * explicitly reinitialized.
1991 * all iocb memory resources are reused.
1993 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1996 * Due to difference in data length between DIF/non-DIF paths,
1997 * we need to set word 4 of IOCB here
1999 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
2004 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2005 * @phba: The Hba for which this call is being executed.
2006 * @lpfc_cmd: The scsi buffer which is going to be mapped.
2008 * This routine wraps the actual DMA mapping function pointer from the
2016 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2018 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2022 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2023 * @phba: Pointer to hba context object.
2024 * @vport: Pointer to vport object.
2025 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2026 * @rsp_iocb: Pointer to response iocb object which reported error.
2028 * This function posts an event when there is a SCSI command reporting
2029 * error from the scsi device.
2032 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2033 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2034 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2035 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2036 uint32_t resp_info = fcprsp->rspStatus2;
2037 uint32_t scsi_status = fcprsp->rspStatus3;
2038 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2039 struct lpfc_fast_path_event *fast_path_evt = NULL;
2040 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2041 unsigned long flags;
2043 /* If there is queuefull or busy condition send a scsi event */
2044 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2045 (cmnd->result == SAM_STAT_BUSY)) {
2046 fast_path_evt = lpfc_alloc_fast_evt(phba);
2049 fast_path_evt->un.scsi_evt.event_type =
2051 fast_path_evt->un.scsi_evt.subcategory =
2052 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2053 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2054 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2055 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2056 &pnode->nlp_portname, sizeof(struct lpfc_name));
2057 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2058 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2059 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2060 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2061 fast_path_evt = lpfc_alloc_fast_evt(phba);
2064 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2066 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2067 LPFC_EVENT_CHECK_COND;
2068 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2070 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2071 &pnode->nlp_portname, sizeof(struct lpfc_name));
2072 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2073 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2074 fast_path_evt->un.check_cond_evt.sense_key =
2075 cmnd->sense_buffer[2] & 0xf;
2076 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2077 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2078 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2080 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2081 ((scsi_status == SAM_STAT_GOOD) &&
2082 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2084 * If status is good or resid does not match with fcp_param and
2085 * there is valid fcpi_parm, then there is a read_check error
2087 fast_path_evt = lpfc_alloc_fast_evt(phba);
2090 fast_path_evt->un.read_check_error.header.event_type =
2091 FC_REG_FABRIC_EVENT;
2092 fast_path_evt->un.read_check_error.header.subcategory =
2093 LPFC_EVENT_FCPRDCHKERR;
2094 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2095 &pnode->nlp_portname, sizeof(struct lpfc_name));
2096 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2097 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2098 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2099 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2100 fast_path_evt->un.read_check_error.fcpiparam =
2105 fast_path_evt->vport = vport;
2106 spin_lock_irqsave(&phba->hbalock, flags);
2107 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2108 spin_unlock_irqrestore(&phba->hbalock, flags);
2109 lpfc_worker_wake_up(phba);
2114 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2115 * @phba: The HBA for which this call is being executed.
2116 * @psb: The scsi buffer which is going to be un-mapped.
2118 * This routine does DMA un-mapping of scatter gather list of scsi command
2119 * field of @lpfc_cmd for device with SLI-3 interface spec.
2122 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2125 * There are only two special cases to consider. (1) the scsi command
2126 * requested scatter-gather usage or (2) the scsi command allocated
2127 * a request buffer, but did not request use_sg. There is a third
2128 * case, but it does not require resource deallocation.
2130 if (psb->seg_cnt > 0)
2131 scsi_dma_unmap(psb->pCmd);
2132 if (psb->prot_seg_cnt > 0)
2133 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2134 scsi_prot_sg_count(psb->pCmd),
2135 psb->pCmd->sc_data_direction);
2139 * lpfc_handler_fcp_err - FCP response handler
2140 * @vport: The virtual port for which this call is being executed.
2141 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2142 * @rsp_iocb: The response IOCB which contains FCP error.
2144 * This routine is called to process response IOCB with status field
2145 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2146 * based upon SCSI and FCP error.
2149 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2150 struct lpfc_iocbq *rsp_iocb)
2152 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2153 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2154 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2155 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2156 uint32_t resp_info = fcprsp->rspStatus2;
2157 uint32_t scsi_status = fcprsp->rspStatus3;
2159 uint32_t host_status = DID_OK;
2160 uint32_t rsplen = 0;
2161 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2165 * If this is a task management command, there is no
2166 * scsi packet associated with this lpfc_cmd. The driver
2169 if (fcpcmd->fcpCntl2) {
2174 if (resp_info & RSP_LEN_VALID) {
2175 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2176 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2177 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2178 "2719 Invalid response length: "
2179 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2181 cmnd->device->lun, cmnd->cmnd[0],
2183 host_status = DID_ERROR;
2186 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2187 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2188 "2757 Protocol failure detected during "
2189 "processing of FCP I/O op: "
2190 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2192 cmnd->device->lun, cmnd->cmnd[0],
2194 host_status = DID_ERROR;
2199 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2200 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2201 if (snslen > SCSI_SENSE_BUFFERSIZE)
2202 snslen = SCSI_SENSE_BUFFERSIZE;
2204 if (resp_info & RSP_LEN_VALID)
2205 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2206 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2208 lp = (uint32_t *)cmnd->sense_buffer;
2210 if (!scsi_status && (resp_info & RESID_UNDER))
2213 lpfc_printf_vlog(vport, KERN_WARNING, logit,
2214 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2215 "Data: x%x x%x x%x x%x x%x\n",
2216 cmnd->cmnd[0], scsi_status,
2217 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2218 be32_to_cpu(fcprsp->rspResId),
2219 be32_to_cpu(fcprsp->rspSnsLen),
2220 be32_to_cpu(fcprsp->rspRspLen),
2223 scsi_set_resid(cmnd, 0);
2224 if (resp_info & RESID_UNDER) {
2225 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2227 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2228 "9025 FCP Read Underrun, expected %d, "
2229 "residual %d Data: x%x x%x x%x\n",
2230 be32_to_cpu(fcpcmd->fcpDl),
2231 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2235 * If there is an under run check if under run reported by
2236 * storage array is same as the under run reported by HBA.
2237 * If this is not same, there is a dropped frame.
2239 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2241 (scsi_get_resid(cmnd) != fcpi_parm)) {
2242 lpfc_printf_vlog(vport, KERN_WARNING,
2243 LOG_FCP | LOG_FCP_ERROR,
2244 "9026 FCP Read Check Error "
2245 "and Underrun Data: x%x x%x x%x x%x\n",
2246 be32_to_cpu(fcpcmd->fcpDl),
2247 scsi_get_resid(cmnd), fcpi_parm,
2249 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2250 host_status = DID_ERROR;
2253 * The cmnd->underflow is the minimum number of bytes that must
2254 * be transfered for this command. Provided a sense condition
2255 * is not present, make sure the actual amount transferred is at
2256 * least the underflow value or fail.
2258 if (!(resp_info & SNS_LEN_VALID) &&
2259 (scsi_status == SAM_STAT_GOOD) &&
2260 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2261 < cmnd->underflow)) {
2262 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2263 "9027 FCP command x%x residual "
2264 "underrun converted to error "
2265 "Data: x%x x%x x%x\n",
2266 cmnd->cmnd[0], scsi_bufflen(cmnd),
2267 scsi_get_resid(cmnd), cmnd->underflow);
2268 host_status = DID_ERROR;
2270 } else if (resp_info & RESID_OVER) {
2271 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2272 "9028 FCP command x%x residual overrun error. "
2273 "Data: x%x x%x\n", cmnd->cmnd[0],
2274 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2275 host_status = DID_ERROR;
2278 * Check SLI validation that all the transfer was actually done
2279 * (fcpi_parm should be zero). Apply check only to reads.
2281 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2282 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2283 "9029 FCP Read Check Error Data: "
2284 "x%x x%x x%x x%x x%x\n",
2285 be32_to_cpu(fcpcmd->fcpDl),
2286 be32_to_cpu(fcprsp->rspResId),
2287 fcpi_parm, cmnd->cmnd[0], scsi_status);
2288 switch (scsi_status) {
2290 case SAM_STAT_CHECK_CONDITION:
2291 /* Fabric dropped a data frame. Fail any successful
2292 * command in which we detected dropped frames.
2293 * A status of good or some check conditions could
2294 * be considered a successful command.
2296 host_status = DID_ERROR;
2299 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2303 cmnd->result = ScsiResult(host_status, scsi_status);
2304 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2308 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2309 * @phba: The Hba for which this call is being executed.
2310 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2311 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2313 * This routine assigns scsi command result by looking into response IOCB
2314 * status field appropriately. This routine handles QUEUE FULL condition as
2315 * well by ramping down device queue depth.
2318 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2319 struct lpfc_iocbq *pIocbOut)
2321 struct lpfc_scsi_buf *lpfc_cmd =
2322 (struct lpfc_scsi_buf *) pIocbIn->context1;
2323 struct lpfc_vport *vport = pIocbIn->vport;
2324 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2325 struct lpfc_nodelist *pnode = rdata->pnode;
2326 struct scsi_cmnd *cmd;
2328 struct scsi_device *tmp_sdev;
2330 unsigned long flags;
2331 struct lpfc_fast_path_event *fast_path_evt;
2332 struct Scsi_Host *shost;
2333 uint32_t queue_depth, scsi_id;
2335 /* Sanity check on return of outstanding command */
2336 if (!(lpfc_cmd->pCmd))
2338 cmd = lpfc_cmd->pCmd;
2339 shost = cmd->device->host;
2341 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2342 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2343 /* pick up SLI4 exhange busy status from HBA */
2344 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2346 if (pnode && NLP_CHK_NODE_ACT(pnode))
2347 atomic_dec(&pnode->cmd_pending);
2349 if (lpfc_cmd->status) {
2350 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2351 (lpfc_cmd->result & IOERR_DRVR_MASK))
2352 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2353 else if (lpfc_cmd->status >= IOSTAT_CNT)
2354 lpfc_cmd->status = IOSTAT_DEFAULT;
2356 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2357 "9030 FCP cmd x%x failed <%d/%d> "
2358 "status: x%x result: x%x Data: x%x x%x\n",
2360 cmd->device ? cmd->device->id : 0xffff,
2361 cmd->device ? cmd->device->lun : 0xffff,
2362 lpfc_cmd->status, lpfc_cmd->result,
2363 pIocbOut->iocb.ulpContext,
2364 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2366 switch (lpfc_cmd->status) {
2367 case IOSTAT_FCP_RSP_ERROR:
2368 /* Call FCP RSP handler to determine result */
2369 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2371 case IOSTAT_NPORT_BSY:
2372 case IOSTAT_FABRIC_BSY:
2373 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2374 fast_path_evt = lpfc_alloc_fast_evt(phba);
2377 fast_path_evt->un.fabric_evt.event_type =
2378 FC_REG_FABRIC_EVENT;
2379 fast_path_evt->un.fabric_evt.subcategory =
2380 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2381 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2382 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2383 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2384 &pnode->nlp_portname,
2385 sizeof(struct lpfc_name));
2386 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2387 &pnode->nlp_nodename,
2388 sizeof(struct lpfc_name));
2390 fast_path_evt->vport = vport;
2391 fast_path_evt->work_evt.evt =
2392 LPFC_EVT_FASTPATH_MGMT_EVT;
2393 spin_lock_irqsave(&phba->hbalock, flags);
2394 list_add_tail(&fast_path_evt->work_evt.evt_listp,
2396 spin_unlock_irqrestore(&phba->hbalock, flags);
2397 lpfc_worker_wake_up(phba);
2399 case IOSTAT_LOCAL_REJECT:
2400 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2401 lpfc_cmd->result == IOERR_NO_RESOURCES ||
2402 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2403 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2404 cmd->result = ScsiResult(DID_REQUEUE, 0);
2408 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2409 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2410 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2411 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2413 * This is a response for a BG enabled
2414 * cmd. Parse BG error
2416 lpfc_parse_bg_err(phba, lpfc_cmd,
2420 lpfc_printf_vlog(vport, KERN_WARNING,
2422 "9031 non-zero BGSTAT "
2423 "on unprotected cmd\n");
2427 /* else: fall through */
2429 cmd->result = ScsiResult(DID_ERROR, 0);
2433 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2434 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2435 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2438 cmd->result = ScsiResult(DID_OK, 0);
2441 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2442 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2444 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2445 "0710 Iodone <%d/%d> cmd %p, error "
2446 "x%x SNS x%x x%x Data: x%x x%x\n",
2447 cmd->device->id, cmd->device->lun, cmd,
2448 cmd->result, *lp, *(lp + 3), cmd->retries,
2449 scsi_get_resid(cmd));
2452 lpfc_update_stats(phba, lpfc_cmd);
2453 result = cmd->result;
2454 if (vport->cfg_max_scsicmpl_time &&
2455 time_after(jiffies, lpfc_cmd->start_time +
2456 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2457 spin_lock_irqsave(shost->host_lock, flags);
2458 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2459 if (pnode->cmd_qdepth >
2460 atomic_read(&pnode->cmd_pending) &&
2461 (atomic_read(&pnode->cmd_pending) >
2462 LPFC_MIN_TGT_QDEPTH) &&
2463 ((cmd->cmnd[0] == READ_10) ||
2464 (cmd->cmnd[0] == WRITE_10)))
2466 atomic_read(&pnode->cmd_pending);
2468 pnode->last_change_time = jiffies;
2470 spin_unlock_irqrestore(shost->host_lock, flags);
2471 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2472 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2473 time_after(jiffies, pnode->last_change_time +
2474 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2475 spin_lock_irqsave(shost->host_lock, flags);
2476 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2478 depth = depth ? depth : 1;
2479 pnode->cmd_qdepth += depth;
2480 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2481 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2482 pnode->last_change_time = jiffies;
2483 spin_unlock_irqrestore(shost->host_lock, flags);
2487 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2489 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2490 queue_depth = cmd->device->queue_depth;
2491 scsi_id = cmd->device->id;
2492 cmd->scsi_done(cmd);
2494 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2496 * If there is a thread waiting for command completion
2497 * wake up the thread.
2499 spin_lock_irqsave(shost->host_lock, flags);
2500 lpfc_cmd->pCmd = NULL;
2501 if (lpfc_cmd->waitq)
2502 wake_up(lpfc_cmd->waitq);
2503 spin_unlock_irqrestore(shost->host_lock, flags);
2504 lpfc_release_scsi_buf(phba, lpfc_cmd);
2509 lpfc_rampup_queue_depth(vport, queue_depth);
2512 * Check for queue full. If the lun is reporting queue full, then
2513 * back off the lun queue depth to prevent target overloads.
2515 if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2516 NLP_CHK_NODE_ACT(pnode)) {
2517 shost_for_each_device(tmp_sdev, shost) {
2518 if (tmp_sdev->id != scsi_id)
2520 depth = scsi_track_queue_full(tmp_sdev,
2521 tmp_sdev->queue_depth-1);
2524 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2525 "0711 detected queue full - lun queue "
2526 "depth adjusted to %d.\n", depth);
2527 lpfc_send_sdev_queuedepth_change_event(phba, vport,
2535 * If there is a thread waiting for command completion
2536 * wake up the thread.
2538 spin_lock_irqsave(shost->host_lock, flags);
2539 lpfc_cmd->pCmd = NULL;
2540 if (lpfc_cmd->waitq)
2541 wake_up(lpfc_cmd->waitq);
2542 spin_unlock_irqrestore(shost->host_lock, flags);
2544 lpfc_release_scsi_buf(phba, lpfc_cmd);
2548 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2549 * @data: A pointer to the immediate command data portion of the IOCB.
2550 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2552 * The routine copies the entire FCP command from @fcp_cmnd to @data while
2553 * byte swapping the data to big endian format for transmission on the wire.
2556 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2559 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2560 i += sizeof(uint32_t), j++) {
2561 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2566 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2567 * @vport: The virtual port for which this call is being executed.
2568 * @lpfc_cmd: The scsi command which needs to send.
2569 * @pnode: Pointer to lpfc_nodelist.
2571 * This routine initializes fcp_cmnd and iocb data structure from scsi command
2572 * to transfer for device with SLI3 interface spec.
2575 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2576 struct lpfc_nodelist *pnode)
2578 struct lpfc_hba *phba = vport->phba;
2579 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2580 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2581 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2582 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2583 int datadir = scsi_cmnd->sc_data_direction;
2586 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2589 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2590 /* clear task management bits */
2591 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2593 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2594 &lpfc_cmd->fcp_cmnd->fcp_lun);
2596 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2598 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2600 case HEAD_OF_QUEUE_TAG:
2601 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2603 case ORDERED_QUEUE_TAG:
2604 fcp_cmnd->fcpCntl1 = ORDERED_Q;
2607 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2611 fcp_cmnd->fcpCntl1 = 0;
2614 * There are three possibilities here - use scatter-gather segment, use
2615 * the single mapping, or neither. Start the lpfc command prep by
2616 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2619 if (scsi_sg_count(scsi_cmnd)) {
2620 if (datadir == DMA_TO_DEVICE) {
2621 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2622 if (phba->sli_rev < LPFC_SLI_REV4) {
2623 iocb_cmd->un.fcpi.fcpi_parm = 0;
2624 iocb_cmd->ulpPU = 0;
2626 iocb_cmd->ulpPU = PARM_READ_CHECK;
2627 fcp_cmnd->fcpCntl3 = WRITE_DATA;
2628 phba->fc4OutputRequests++;
2630 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2631 iocb_cmd->ulpPU = PARM_READ_CHECK;
2632 fcp_cmnd->fcpCntl3 = READ_DATA;
2633 phba->fc4InputRequests++;
2636 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2637 iocb_cmd->un.fcpi.fcpi_parm = 0;
2638 iocb_cmd->ulpPU = 0;
2639 fcp_cmnd->fcpCntl3 = 0;
2640 phba->fc4ControlRequests++;
2642 if (phba->sli_rev == 3 &&
2643 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2644 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2646 * Finish initializing those IOCB fields that are independent
2647 * of the scsi_cmnd request_buffer
2649 piocbq->iocb.ulpContext = pnode->nlp_rpi;
2650 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2651 piocbq->iocb.ulpFCP2Rcvy = 1;
2653 piocbq->iocb.ulpFCP2Rcvy = 0;
2655 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2656 piocbq->context1 = lpfc_cmd;
2657 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2658 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2659 piocbq->vport = vport;
2663 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2664 * @vport: The virtual port for which this call is being executed.
2665 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2666 * @lun: Logical unit number.
2667 * @task_mgmt_cmd: SCSI task management command.
2669 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2670 * for device with SLI-3 interface spec.
2677 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2678 struct lpfc_scsi_buf *lpfc_cmd,
2680 uint8_t task_mgmt_cmd)
2682 struct lpfc_iocbq *piocbq;
2684 struct fcp_cmnd *fcp_cmnd;
2685 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2686 struct lpfc_nodelist *ndlp = rdata->pnode;
2688 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2689 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2692 piocbq = &(lpfc_cmd->cur_iocbq);
2693 piocbq->vport = vport;
2695 piocb = &piocbq->iocb;
2697 fcp_cmnd = lpfc_cmd->fcp_cmnd;
2698 /* Clear out any old data in the FCP command area */
2699 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2700 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2701 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2702 if (vport->phba->sli_rev == 3 &&
2703 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2704 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2705 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2706 piocb->ulpContext = ndlp->nlp_rpi;
2707 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2708 piocb->ulpFCP2Rcvy = 1;
2710 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2712 /* ulpTimeout is only one byte */
2713 if (lpfc_cmd->timeout > 0xff) {
2715 * Do not timeout the command at the firmware level.
2716 * The driver will provide the timeout mechanism.
2718 piocb->ulpTimeout = 0;
2720 piocb->ulpTimeout = lpfc_cmd->timeout;
2722 if (vport->phba->sli_rev == LPFC_SLI_REV4)
2723 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2729 * lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
2730 * @phba: The hba struct for which this call is being executed.
2731 * @dev_grp: The HBA PCI-Device group number.
2733 * This routine sets up the SCSI interface API function jump table in @phba
2735 * Returns: 0 - success, -ENODEV - failure.
2738 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2741 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2742 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2743 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2746 case LPFC_PCI_DEV_LP:
2747 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2748 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2749 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2751 case LPFC_PCI_DEV_OC:
2752 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2753 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2754 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2757 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2758 "1418 Invalid HBA PCI-device group: 0x%x\n",
2763 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2764 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2765 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2770 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2771 * @phba: The Hba for which this call is being executed.
2772 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2773 * @rspiocbq: Pointer to lpfc_iocbq data structure.
2775 * This routine is IOCB completion routine for device reset and target reset
2776 * routine. This routine release scsi buffer associated with lpfc_cmd.
2779 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2780 struct lpfc_iocbq *cmdiocbq,
2781 struct lpfc_iocbq *rspiocbq)
2783 struct lpfc_scsi_buf *lpfc_cmd =
2784 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2786 lpfc_release_scsi_buf(phba, lpfc_cmd);
2791 * lpfc_info - Info entry point of scsi_host_template data structure
2792 * @host: The scsi host for which this call is being executed.
2794 * This routine provides module information about hba.
2797 * Pointer to char - Success.
2800 lpfc_info(struct Scsi_Host *host)
2802 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2803 struct lpfc_hba *phba = vport->phba;
2805 static char lpfcinfobuf[384];
2807 memset(lpfcinfobuf,0,384);
2808 if (phba && phba->pcidev){
2809 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2810 len = strlen(lpfcinfobuf);
2811 snprintf(lpfcinfobuf + len,
2813 " on PCI bus %02x device %02x irq %d",
2814 phba->pcidev->bus->number,
2815 phba->pcidev->devfn,
2817 len = strlen(lpfcinfobuf);
2818 if (phba->Port[0]) {
2819 snprintf(lpfcinfobuf + len,
2824 len = strlen(lpfcinfobuf);
2825 if (phba->sli4_hba.link_state.logical_speed) {
2826 snprintf(lpfcinfobuf + len,
2828 " Logical Link Speed: %d Mbps",
2829 phba->sli4_hba.link_state.logical_speed * 10);
2836 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2837 * @phba: The Hba for which this call is being executed.
2839 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
2840 * The default value of cfg_poll_tmo is 10 milliseconds.
2842 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2844 unsigned long poll_tmo_expires =
2845 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2847 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2848 mod_timer(&phba->fcp_poll_timer,
2853 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2854 * @phba: The Hba for which this call is being executed.
2856 * This routine starts the fcp_poll_timer of @phba.
2858 void lpfc_poll_start_timer(struct lpfc_hba * phba)
2860 lpfc_poll_rearm_timer(phba);
2864 * lpfc_poll_timeout - Restart polling timer
2865 * @ptr: Map to lpfc_hba data structure pointer.
2867 * This routine restarts fcp_poll timer, when FCP ring polling is enable
2868 * and FCP Ring interrupt is disable.
2871 void lpfc_poll_timeout(unsigned long ptr)
2873 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2875 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2876 lpfc_sli_handle_fast_ring_event(phba,
2877 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
2879 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
2880 lpfc_poll_rearm_timer(phba);
2885 * lpfc_queuecommand - scsi_host_template queuecommand entry point
2886 * @cmnd: Pointer to scsi_cmnd data structure.
2887 * @done: Pointer to done routine.
2889 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
2890 * This routine prepares an IOCB from scsi command and provides to firmware.
2891 * The @done callback is invoked after driver finished processing the command.
2895 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
2898 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
2900 struct Scsi_Host *shost = cmnd->device->host;
2901 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
2902 struct lpfc_hba *phba = vport->phba;
2903 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
2904 struct lpfc_nodelist *ndlp;
2905 struct lpfc_scsi_buf *lpfc_cmd;
2906 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
2909 err = fc_remote_port_chkready(rport);
2912 goto out_fail_command;
2914 ndlp = rdata->pnode;
2916 if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
2917 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2919 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2920 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
2921 " op:%02x str=%s without registering for"
2922 " BlockGuard - Rejecting command\n",
2923 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2924 dif_op_str[scsi_get_prot_op(cmnd)]);
2925 goto out_fail_command;
2929 * Catch race where our node has transitioned, but the
2930 * transport is still transitioning.
2932 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
2933 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2934 goto out_fail_command;
2936 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
2939 lpfc_cmd = lpfc_get_scsi_buf(phba);
2940 if (lpfc_cmd == NULL) {
2941 lpfc_rampdown_queue_depth(phba);
2943 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2944 "0707 driver's buffer pool is empty, "
2950 * Store the midlayer's command structure for the completion phase
2951 * and complete the command initialization.
2953 lpfc_cmd->pCmd = cmnd;
2954 lpfc_cmd->rdata = rdata;
2955 lpfc_cmd->timeout = 0;
2956 lpfc_cmd->start_time = jiffies;
2957 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
2958 cmnd->scsi_done = done;
2960 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2961 if (vport->phba->cfg_enable_bg) {
2962 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2963 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
2965 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2966 dif_op_str[scsi_get_prot_op(cmnd)]);
2967 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2968 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
2969 "%02x %02x %02x %02x %02x\n",
2970 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
2971 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
2972 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
2974 if (cmnd->cmnd[0] == READ_10)
2975 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2976 "9035 BLKGRD: READ @ sector %llu, "
2978 (unsigned long long)scsi_get_lba(cmnd),
2979 blk_rq_sectors(cmnd->request));
2980 else if (cmnd->cmnd[0] == WRITE_10)
2981 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2982 "9036 BLKGRD: WRITE @ sector %llu, "
2983 "count %u cmd=%p\n",
2984 (unsigned long long)scsi_get_lba(cmnd),
2985 blk_rq_sectors(cmnd->request),
2989 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
2991 if (vport->phba->cfg_enable_bg) {
2992 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2993 "9038 BLKGRD: rcvd unprotected cmd:"
2994 "%02x op:%02x str=%s\n",
2995 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2996 dif_op_str[scsi_get_prot_op(cmnd)]);
2997 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2998 "9039 BLKGRD: CDB: %02x %02x %02x "
2999 "%02x %02x %02x %02x %02x %02x %02x\n",
3000 cmnd->cmnd[0], cmnd->cmnd[1],
3001 cmnd->cmnd[2], cmnd->cmnd[3],
3002 cmnd->cmnd[4], cmnd->cmnd[5],
3003 cmnd->cmnd[6], cmnd->cmnd[7],
3004 cmnd->cmnd[8], cmnd->cmnd[9]);
3005 if (cmnd->cmnd[0] == READ_10)
3006 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3007 "9040 dbg: READ @ sector %llu, "
3009 (unsigned long long)scsi_get_lba(cmnd),
3010 blk_rq_sectors(cmnd->request));
3011 else if (cmnd->cmnd[0] == WRITE_10)
3012 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3013 "9041 dbg: WRITE @ sector %llu, "
3014 "count %u cmd=%p\n",
3015 (unsigned long long)scsi_get_lba(cmnd),
3016 blk_rq_sectors(cmnd->request), cmnd);
3018 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3019 "9042 dbg: parser not implemented\n");
3021 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3025 goto out_host_busy_free_buf;
3027 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
3029 atomic_inc(&ndlp->cmd_pending);
3030 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3031 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3033 atomic_dec(&ndlp->cmd_pending);
3034 goto out_host_busy_free_buf;
3036 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3037 spin_unlock(shost->host_lock);
3038 lpfc_sli_handle_fast_ring_event(phba,
3039 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3041 spin_lock(shost->host_lock);
3042 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3043 lpfc_poll_rearm_timer(phba);
3048 out_host_busy_free_buf:
3049 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3050 lpfc_release_scsi_buf(phba, lpfc_cmd);
3052 return SCSI_MLQUEUE_HOST_BUSY;
3060 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3061 * @cmnd: Pointer to scsi_cmnd data structure.
3063 * This routine aborts @cmnd pending in base driver.
3070 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3072 struct Scsi_Host *shost = cmnd->device->host;
3073 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3074 struct lpfc_hba *phba = vport->phba;
3075 struct lpfc_iocbq *iocb;
3076 struct lpfc_iocbq *abtsiocb;
3077 struct lpfc_scsi_buf *lpfc_cmd;
3080 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3082 ret = fc_block_scsi_eh(cmnd);
3085 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3087 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3088 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
3090 "LUN %d snum %#lx\n", ret, cmnd->device->id,
3091 cmnd->device->lun, cmnd->serial_number);
3096 * If pCmd field of the corresponding lpfc_scsi_buf structure
3097 * points to a different SCSI command, then the driver has
3098 * already completed this command, but the midlayer did not
3099 * see the completion before the eh fired. Just return
3102 iocb = &lpfc_cmd->cur_iocbq;
3103 if (lpfc_cmd->pCmd != cmnd)
3106 BUG_ON(iocb->context1 != lpfc_cmd);
3108 abtsiocb = lpfc_sli_get_iocbq(phba);
3109 if (abtsiocb == NULL) {
3115 * The scsi command can not be in txq and it is in flight because the
3116 * pCmd is still pointig at the SCSI command we have to abort. There
3117 * is no need to search the txcmplq. Just send an abort to the FW.
3121 icmd = &abtsiocb->iocb;
3122 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3123 icmd->un.acxri.abortContextTag = cmd->ulpContext;
3124 if (phba->sli_rev == LPFC_SLI_REV4)
3125 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3127 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3130 icmd->ulpClass = cmd->ulpClass;
3132 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3133 abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3134 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3136 if (lpfc_is_link_up(phba))
3137 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3139 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3141 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3142 abtsiocb->vport = vport;
3143 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3145 lpfc_sli_release_iocbq(phba, abtsiocb);
3150 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3151 lpfc_sli_handle_fast_ring_event(phba,
3152 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3154 lpfc_cmd->waitq = &waitq;
3155 /* Wait for abort to complete */
3156 wait_event_timeout(waitq,
3157 (lpfc_cmd->pCmd != cmnd),
3158 (2*vport->cfg_devloss_tmo*HZ));
3160 spin_lock_irq(shost->host_lock);
3161 lpfc_cmd->waitq = NULL;
3162 spin_unlock_irq(shost->host_lock);
3164 if (lpfc_cmd->pCmd == cmnd) {
3166 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3167 "0748 abort handler timed out waiting "
3168 "for abort to complete: ret %#x, ID %d, "
3169 "LUN %d, snum %#lx\n",
3170 ret, cmnd->device->id, cmnd->device->lun,
3171 cmnd->serial_number);
3175 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3176 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3177 "LUN %d snum %#lx\n", ret, cmnd->device->id,
3178 cmnd->device->lun, cmnd->serial_number);
3183 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3185 switch (task_mgmt_cmd) {
3186 case FCP_ABORT_TASK_SET:
3187 return "ABORT_TASK_SET";
3188 case FCP_CLEAR_TASK_SET:
3189 return "FCP_CLEAR_TASK_SET";
3191 return "FCP_BUS_RESET";
3193 return "FCP_LUN_RESET";
3194 case FCP_TARGET_RESET:
3195 return "FCP_TARGET_RESET";
3197 return "FCP_CLEAR_ACA";
3198 case FCP_TERMINATE_TASK:
3199 return "FCP_TERMINATE_TASK";
3206 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3207 * @vport: The virtual port for which this call is being executed.
3208 * @rdata: Pointer to remote port local data
3209 * @tgt_id: Target ID of remote device.
3210 * @lun_id: Lun number for the TMF
3211 * @task_mgmt_cmd: type of TMF to send
3213 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3221 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3222 unsigned tgt_id, unsigned int lun_id,
3223 uint8_t task_mgmt_cmd)
3225 struct lpfc_hba *phba = vport->phba;
3226 struct lpfc_scsi_buf *lpfc_cmd;
3227 struct lpfc_iocbq *iocbq;
3228 struct lpfc_iocbq *iocbqrsp;
3232 if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
3235 lpfc_cmd = lpfc_get_scsi_buf(phba);
3236 if (lpfc_cmd == NULL)
3238 lpfc_cmd->timeout = 60;
3239 lpfc_cmd->rdata = rdata;
3241 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3244 lpfc_release_scsi_buf(phba, lpfc_cmd);
3248 iocbq = &lpfc_cmd->cur_iocbq;
3249 iocbqrsp = lpfc_sli_get_iocbq(phba);
3250 if (iocbqrsp == NULL) {
3251 lpfc_release_scsi_buf(phba, lpfc_cmd);
3255 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3256 "0702 Issue %s to TGT %d LUN %d "
3257 "rpi x%x nlp_flag x%x\n",
3258 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3259 rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
3261 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3262 iocbq, iocbqrsp, lpfc_cmd->timeout);
3263 if (status != IOCB_SUCCESS) {
3264 if (status == IOCB_TIMEDOUT) {
3265 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3266 ret = TIMEOUT_ERROR;
3269 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3270 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3271 "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
3272 lpfc_taskmgmt_name(task_mgmt_cmd),
3273 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3274 iocbqrsp->iocb.un.ulpWord[4]);
3275 } else if (status == IOCB_BUSY)
3280 lpfc_sli_release_iocbq(phba, iocbqrsp);
3282 if (ret != TIMEOUT_ERROR)
3283 lpfc_release_scsi_buf(phba, lpfc_cmd);
3289 * lpfc_chk_tgt_mapped -
3290 * @vport: The virtual port to check on
3291 * @cmnd: Pointer to scsi_cmnd data structure.
3293 * This routine delays until the scsi target (aka rport) for the
3294 * command exists (is present and logged in) or we declare it non-existent.
3301 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3303 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3304 struct lpfc_nodelist *pnode;
3305 unsigned long later;
3308 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3309 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3312 pnode = rdata->pnode;
3314 * If target is not in a MAPPED state, delay until
3315 * target is rediscovered or devloss timeout expires.
3317 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3318 while (time_after(later, jiffies)) {
3319 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3321 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3323 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3324 rdata = cmnd->device->hostdata;
3327 pnode = rdata->pnode;
3329 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3330 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3336 * lpfc_reset_flush_io_context -
3337 * @vport: The virtual port (scsi_host) for the flush context
3338 * @tgt_id: If aborting by Target contect - specifies the target id
3339 * @lun_id: If aborting by Lun context - specifies the lun id
3340 * @context: specifies the context level to flush at.
3342 * After a reset condition via TMF, we need to flush orphaned i/o
3343 * contexts from the adapter. This routine aborts any contexts
3344 * outstanding, then waits for their completions. The wait is
3345 * bounded by devloss_tmo though.
3352 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3353 uint64_t lun_id, lpfc_ctx_cmd context)
3355 struct lpfc_hba *phba = vport->phba;
3356 unsigned long later;
3359 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3361 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3362 tgt_id, lun_id, context);
3363 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3364 while (time_after(later, jiffies) && cnt) {
3365 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3366 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3369 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3370 "0724 I/O flush failure for context %s : cnt x%x\n",
3371 ((context == LPFC_CTX_LUN) ? "LUN" :
3372 ((context == LPFC_CTX_TGT) ? "TGT" :
3373 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3381 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3382 * @cmnd: Pointer to scsi_cmnd data structure.
3384 * This routine does a device reset by sending a LUN_RESET task management
3392 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3394 struct Scsi_Host *shost = cmnd->device->host;
3395 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3396 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3397 struct lpfc_nodelist *pnode;
3398 unsigned tgt_id = cmnd->device->id;
3399 unsigned int lun_id = cmnd->device->lun;
3400 struct lpfc_scsi_event_header scsi_event;
3404 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3405 "0798 Device Reset rport failure: rdata x%p\n", rdata);
3408 pnode = rdata->pnode;
3409 status = fc_block_scsi_eh(cmnd);
3413 status = lpfc_chk_tgt_mapped(vport, cmnd);
3414 if (status == FAILED) {
3415 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3416 "0721 Device Reset rport failure: rdata x%p\n", rdata);
3420 scsi_event.event_type = FC_REG_SCSI_EVENT;
3421 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3422 scsi_event.lun = lun_id;
3423 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3424 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3426 fc_host_post_vendor_event(shost, fc_get_event_number(),
3427 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3429 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3432 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3433 "0713 SCSI layer issued Device Reset (%d, %d) "
3434 "return x%x\n", tgt_id, lun_id, status);
3437 * We have to clean up i/o as : they may be orphaned by the TMF;
3438 * or if the TMF failed, they may be in an indeterminate state.
3440 * We will report success if all the i/o aborts successfully.
3442 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3448 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3449 * @cmnd: Pointer to scsi_cmnd data structure.
3451 * This routine does a target reset by sending a TARGET_RESET task management
3459 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3461 struct Scsi_Host *shost = cmnd->device->host;
3462 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3463 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3464 struct lpfc_nodelist *pnode;
3465 unsigned tgt_id = cmnd->device->id;
3466 unsigned int lun_id = cmnd->device->lun;
3467 struct lpfc_scsi_event_header scsi_event;
3471 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3472 "0799 Target Reset rport failure: rdata x%p\n", rdata);
3475 pnode = rdata->pnode;
3476 status = fc_block_scsi_eh(cmnd);
3480 status = lpfc_chk_tgt_mapped(vport, cmnd);
3481 if (status == FAILED) {
3482 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3483 "0722 Target Reset rport failure: rdata x%p\n", rdata);
3487 scsi_event.event_type = FC_REG_SCSI_EVENT;
3488 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3490 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3491 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3493 fc_host_post_vendor_event(shost, fc_get_event_number(),
3494 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3496 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3499 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3500 "0723 SCSI layer issued Target Reset (%d, %d) "
3501 "return x%x\n", tgt_id, lun_id, status);
3504 * We have to clean up i/o as : they may be orphaned by the TMF;
3505 * or if the TMF failed, they may be in an indeterminate state.
3507 * We will report success if all the i/o aborts successfully.
3509 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3515 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3516 * @cmnd: Pointer to scsi_cmnd data structure.
3518 * This routine does target reset to all targets on @cmnd->device->host.
3519 * This emulates Parallel SCSI Bus Reset Semantics.
3526 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3528 struct Scsi_Host *shost = cmnd->device->host;
3529 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3530 struct lpfc_nodelist *ndlp = NULL;
3531 struct lpfc_scsi_event_header scsi_event;
3533 int ret = SUCCESS, status, i;
3535 scsi_event.event_type = FC_REG_SCSI_EVENT;
3536 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3538 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3539 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3541 fc_host_post_vendor_event(shost, fc_get_event_number(),
3542 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3544 ret = fc_block_scsi_eh(cmnd);
3549 * Since the driver manages a single bus device, reset all
3550 * targets known to the driver. Should any target reset
3551 * fail, this routine returns failure to the midlayer.
3553 for (i = 0; i < LPFC_MAX_TARGET; i++) {
3554 /* Search for mapped node by target ID */
3556 spin_lock_irq(shost->host_lock);
3557 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3558 if (!NLP_CHK_NODE_ACT(ndlp))
3560 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3561 ndlp->nlp_sid == i &&
3567 spin_unlock_irq(shost->host_lock);
3571 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3572 i, 0, FCP_TARGET_RESET);
3574 if (status != SUCCESS) {
3575 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3576 "0700 Bus Reset on target %d failed\n",
3582 * We have to clean up i/o as : they may be orphaned by the TMFs
3583 * above; or if any of the TMFs failed, they may be in an
3584 * indeterminate state.
3585 * We will report success if all the i/o aborts successfully.
3588 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3589 if (status != SUCCESS)
3592 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3593 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3598 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3599 * @sdev: Pointer to scsi_device.
3601 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
3602 * globally available list of scsi buffers. This routine also makes sure scsi
3603 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3604 * of scsi buffer exists for the lifetime of the driver.
3611 lpfc_slave_alloc(struct scsi_device *sdev)
3613 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3614 struct lpfc_hba *phba = vport->phba;
3615 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3617 uint32_t num_to_alloc = 0;
3618 int num_allocated = 0;
3621 if (!rport || fc_remote_port_chkready(rport))
3624 sdev->hostdata = rport->dd_data;
3625 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
3628 * Populate the cmds_per_lun count scsi_bufs into this host's globally
3629 * available list of scsi buffers. Don't allocate more than the
3630 * HBA limit conveyed to the midlayer via the host structure. The
3631 * formula accounts for the lun_queue_depth + error handlers + 1
3632 * extra. This list of scsi bufs exists for the lifetime of the driver.
3634 total = phba->total_scsi_bufs;
3635 num_to_alloc = vport->cfg_lun_queue_depth + 2;
3637 /* If allocated buffers are enough do nothing */
3638 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3641 /* Allow some exchanges to be available always to complete discovery */
3642 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3643 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3644 "0704 At limitation of %d preallocated "
3645 "command buffers\n", total);
3647 /* Allow some exchanges to be available always to complete discovery */
3648 } else if (total + num_to_alloc >
3649 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3650 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3651 "0705 Allocation request of %d "
3652 "command buffers will exceed max of %d. "
3653 "Reducing allocation request to %d.\n",
3654 num_to_alloc, phba->cfg_hba_queue_depth,
3655 (phba->cfg_hba_queue_depth - total));
3656 num_to_alloc = phba->cfg_hba_queue_depth - total;
3658 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3659 if (num_to_alloc != num_allocated) {
3660 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3661 "0708 Allocation request of %d "
3662 "command buffers did not succeed. "
3663 "Allocated %d buffers.\n",
3664 num_to_alloc, num_allocated);
3666 if (num_allocated > 0)
3667 phba->total_scsi_bufs += num_allocated;
3672 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3673 * @sdev: Pointer to scsi_device.
3675 * This routine configures following items
3676 * - Tag command queuing support for @sdev if supported.
3677 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3683 lpfc_slave_configure(struct scsi_device *sdev)
3685 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3686 struct lpfc_hba *phba = vport->phba;
3688 if (sdev->tagged_supported)
3689 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3691 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3693 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3694 lpfc_sli_handle_fast_ring_event(phba,
3695 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3696 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3697 lpfc_poll_rearm_timer(phba);
3704 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3705 * @sdev: Pointer to scsi_device.
3707 * This routine sets @sdev hostatdata filed to null.
3710 lpfc_slave_destroy(struct scsi_device *sdev)
3712 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3713 struct lpfc_hba *phba = vport->phba;
3714 atomic_dec(&phba->sdev_cnt);
3715 sdev->hostdata = NULL;
3720 struct scsi_host_template lpfc_template = {
3721 .module = THIS_MODULE,
3722 .name = LPFC_DRIVER_NAME,
3724 .queuecommand = lpfc_queuecommand,
3725 .eh_abort_handler = lpfc_abort_handler,
3726 .eh_device_reset_handler = lpfc_device_reset_handler,
3727 .eh_target_reset_handler = lpfc_target_reset_handler,
3728 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3729 .slave_alloc = lpfc_slave_alloc,
3730 .slave_configure = lpfc_slave_configure,
3731 .slave_destroy = lpfc_slave_destroy,
3732 .scan_finished = lpfc_scan_finished,
3734 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3735 .cmd_per_lun = LPFC_CMD_PER_LUN,
3736 .use_clustering = ENABLE_CLUSTERING,
3737 .shost_attrs = lpfc_hba_attrs,
3738 .max_sectors = 0xFFFF,
3739 .vendor_id = LPFC_NL_VENDOR_ID,
3740 .change_queue_depth = lpfc_change_queue_depth,
3743 struct scsi_host_template lpfc_vport_template = {
3744 .module = THIS_MODULE,
3745 .name = LPFC_DRIVER_NAME,
3747 .queuecommand = lpfc_queuecommand,
3748 .eh_abort_handler = lpfc_abort_handler,
3749 .eh_device_reset_handler = lpfc_device_reset_handler,
3750 .eh_target_reset_handler = lpfc_target_reset_handler,
3751 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3752 .slave_alloc = lpfc_slave_alloc,
3753 .slave_configure = lpfc_slave_configure,
3754 .slave_destroy = lpfc_slave_destroy,
3755 .scan_finished = lpfc_scan_finished,
3757 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3758 .cmd_per_lun = LPFC_CMD_PER_LUN,
3759 .use_clustering = ENABLE_CLUSTERING,
3760 .shost_attrs = lpfc_vport_attrs,
3761 .max_sectors = 0xFFFF,
3762 .change_queue_depth = lpfc_change_queue_depth,