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 lpfc_release_scsi_buf_s3(phba, psb);
610 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
611 * @phba: pointer to lpfc hba data structure.
612 * @axri: pointer to the fcp xri abort wcqe structure.
614 * This routine is invoked by the worker thread to process a SLI4 fast-path
618 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
619 struct sli4_wcqe_xri_aborted *axri)
621 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
622 struct lpfc_scsi_buf *psb, *next_psb;
623 unsigned long iflag = 0;
624 struct lpfc_iocbq *iocbq;
627 spin_lock_irqsave(&phba->hbalock, iflag);
628 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
629 list_for_each_entry_safe(psb, next_psb,
630 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
631 if (psb->cur_iocbq.sli4_xritag == xri) {
632 list_del(&psb->list);
634 psb->status = IOSTAT_SUCCESS;
636 &phba->sli4_hba.abts_scsi_buf_list_lock);
637 spin_unlock_irqrestore(&phba->hbalock, iflag);
638 lpfc_release_scsi_buf_s4(phba, psb);
642 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
643 for (i = 1; i <= phba->sli.last_iotag; i++) {
644 iocbq = phba->sli.iocbq_lookup[i];
646 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
647 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
649 if (iocbq->sli4_xritag != xri)
651 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
653 spin_unlock_irqrestore(&phba->hbalock, iflag);
657 spin_unlock_irqrestore(&phba->hbalock, iflag);
661 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
662 * @phba: pointer to lpfc hba data structure.
664 * This routine walks the list of scsi buffers that have been allocated and
665 * repost them to the HBA by using SGL block post. This is needed after a
666 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
667 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
668 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
670 * Returns: 0 = success, non-zero failure.
673 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
675 struct lpfc_scsi_buf *psb;
676 int index, status, bcnt = 0, rcnt = 0, rc = 0;
679 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
680 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
682 /* Remove from SCSI buffer list */
683 list_del(&psb->list);
684 /* Add it to a local SCSI buffer list */
685 list_add_tail(&psb->list, &sblist);
686 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
691 /* A hole present in the XRI array, need to skip */
694 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
695 /* End of XRI array for SCSI buffer, complete */
698 /* Continue until collect up to a nembed page worth of sgls */
701 /* Now, post the SCSI buffer list sgls as a block */
702 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
703 /* Reset SCSI buffer count for next round of posting */
705 while (!list_empty(&sblist)) {
706 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
709 /* Put this back on the abort scsi list */
714 psb->status = IOSTAT_SUCCESS;
716 /* Put it back into the SCSI buffer list */
717 lpfc_release_scsi_buf_s4(phba, psb);
724 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
725 * @vport: The virtual port for which this call being executed.
726 * @num_to_allocate: The requested number of buffers to allocate.
728 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
729 * the scsi buffer contains all the necessary information needed to initiate
733 * int - number of scsi buffers that were allocated.
734 * 0 = failure, less than num_to_alloc is a partial failure.
737 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
739 struct lpfc_hba *phba = vport->phba;
740 struct lpfc_scsi_buf *psb;
741 struct sli4_sge *sgl;
743 dma_addr_t pdma_phys_fcp_cmd;
744 dma_addr_t pdma_phys_fcp_rsp;
745 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
746 uint16_t iotag, last_xritag = NO_XRI;
747 int status = 0, index;
749 int non_sequential_xri = 0;
753 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
754 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
759 * Get memory from the pci pool to map the virt space to pci bus
760 * space for an I/O. The DMA buffer includes space for the
761 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
762 * necessary to support the sg_tablesize.
764 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
765 GFP_KERNEL, &psb->dma_handle);
771 /* Initialize virtual ptrs to dma_buf region. */
772 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
774 /* Allocate iotag for psb->cur_iocbq. */
775 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
781 psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
782 if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
783 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
784 psb->data, psb->dma_handle);
788 if (last_xritag != NO_XRI
789 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
790 non_sequential_xri = 1;
792 list_add_tail(&psb->list, &sblist);
793 last_xritag = psb->cur_iocbq.sli4_xritag;
795 index = phba->sli4_hba.scsi_xri_cnt++;
796 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
798 psb->fcp_bpl = psb->data;
799 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
800 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
801 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
802 sizeof(struct fcp_cmnd));
804 /* Initialize local short-hand pointers. */
805 sgl = (struct sli4_sge *)psb->fcp_bpl;
806 pdma_phys_bpl = psb->dma_handle;
808 (psb->dma_handle + phba->cfg_sg_dma_buf_size)
809 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
810 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
813 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
814 * are sg list bdes. Initialize the first two and leave the
815 * rest for queuecommand.
817 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
818 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
819 bf_set(lpfc_sli4_sge_last, sgl, 0);
820 sgl->word2 = cpu_to_le32(sgl->word2);
821 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
824 /* Setup the physical region for the FCP RSP */
825 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
826 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
827 bf_set(lpfc_sli4_sge_last, sgl, 1);
828 sgl->word2 = cpu_to_le32(sgl->word2);
829 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
832 * Since the IOCB for the FCP I/O is built into this
833 * lpfc_scsi_buf, initialize it with all known data now.
835 iocb = &psb->cur_iocbq.iocb;
836 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
837 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
838 /* setting the BLP size to 2 * sizeof BDE may not be correct.
839 * We are setting the bpl to point to out sgl. An sgl's
840 * entries are 16 bytes, a bpl entries are 12 bytes.
842 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
843 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
844 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
845 iocb->ulpBdeCount = 1;
847 iocb->ulpClass = CLASS3;
848 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
849 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
852 psb->dma_phys_bpl = pdma_phys_bpl;
853 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
854 if (non_sequential_xri) {
855 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
857 psb->cur_iocbq.sli4_xritag);
859 /* Put this back on the abort scsi list */
864 psb->status = IOSTAT_SUCCESS;
866 /* Put it back into the SCSI buffer list */
867 lpfc_release_scsi_buf_s4(phba, psb);
872 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
873 /* Reset SCSI buffer count for next round of posting */
874 while (!list_empty(&sblist)) {
875 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
878 /* Put this back on the abort scsi list */
883 psb->status = IOSTAT_SUCCESS;
885 /* Put it back into the SCSI buffer list */
886 lpfc_release_scsi_buf_s4(phba, psb);
890 return bcnt + non_sequential_xri - rc;
894 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
895 * @vport: The virtual port for which this call being executed.
896 * @num_to_allocate: The requested number of buffers to allocate.
898 * This routine wraps the actual SCSI buffer allocator function pointer from
899 * the lpfc_hba struct.
902 * int - number of scsi buffers that were allocated.
903 * 0 = failure, less than num_to_alloc is a partial failure.
906 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
908 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
912 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
913 * @phba: The HBA for which this call is being executed.
915 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
916 * and returns to caller.
920 * Pointer to lpfc_scsi_buf - Success
922 static struct lpfc_scsi_buf*
923 lpfc_get_scsi_buf(struct lpfc_hba * phba)
925 struct lpfc_scsi_buf * lpfc_cmd = NULL;
926 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
927 unsigned long iflag = 0;
929 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
930 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
932 lpfc_cmd->seg_cnt = 0;
933 lpfc_cmd->nonsg_phys = 0;
934 lpfc_cmd->prot_seg_cnt = 0;
936 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
941 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
942 * @phba: The Hba for which this call is being executed.
943 * @psb: The scsi buffer which is being released.
945 * This routine releases @psb scsi buffer by adding it to tail of @phba
946 * lpfc_scsi_buf_list list.
949 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
951 unsigned long iflag = 0;
953 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
955 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
956 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
960 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
961 * @phba: The Hba for which this call is being executed.
962 * @psb: The scsi buffer which is being released.
964 * This routine releases @psb scsi buffer by adding it to tail of @phba
965 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
966 * and cannot be reused for at least RA_TOV amount of time if it was
970 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
972 unsigned long iflag = 0;
974 if (psb->exch_busy) {
975 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
978 list_add_tail(&psb->list,
979 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
980 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
984 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
986 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
987 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
992 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
993 * @phba: The Hba for which this call is being executed.
994 * @psb: The scsi buffer which is being released.
996 * This routine releases @psb scsi buffer by adding it to tail of @phba
997 * lpfc_scsi_buf_list list.
1000 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1003 phba->lpfc_release_scsi_buf(phba, psb);
1007 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1008 * @phba: The Hba for which this call is being executed.
1009 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1011 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1012 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1013 * through sg elements and format the bdea. This routine also initializes all
1014 * IOCB fields which are dependent on scsi command request buffer.
1021 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1023 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1024 struct scatterlist *sgel = NULL;
1025 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1026 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1027 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1028 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1029 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1030 dma_addr_t physaddr;
1031 uint32_t num_bde = 0;
1032 int nseg, datadir = scsi_cmnd->sc_data_direction;
1035 * There are three possibilities here - use scatter-gather segment, use
1036 * the single mapping, or neither. Start the lpfc command prep by
1037 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1041 if (scsi_sg_count(scsi_cmnd)) {
1043 * The driver stores the segment count returned from pci_map_sg
1044 * because this a count of dma-mappings used to map the use_sg
1045 * pages. They are not guaranteed to be the same for those
1046 * architectures that implement an IOMMU.
1049 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1050 scsi_sg_count(scsi_cmnd), datadir);
1051 if (unlikely(!nseg))
1054 lpfc_cmd->seg_cnt = nseg;
1055 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1056 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1057 "9064 BLKGRD: %s: Too many sg segments from "
1058 "dma_map_sg. Config %d, seg_cnt %d\n",
1059 __func__, phba->cfg_sg_seg_cnt,
1061 scsi_dma_unmap(scsi_cmnd);
1066 * The driver established a maximum scatter-gather segment count
1067 * during probe that limits the number of sg elements in any
1068 * single scsi command. Just run through the seg_cnt and format
1070 * When using SLI-3 the driver will try to fit all the BDEs into
1071 * the IOCB. If it can't then the BDEs get added to a BPL as it
1072 * does for SLI-2 mode.
1074 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1075 physaddr = sg_dma_address(sgel);
1076 if (phba->sli_rev == 3 &&
1077 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1078 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1079 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1080 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1081 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1082 data_bde->addrLow = putPaddrLow(physaddr);
1083 data_bde->addrHigh = putPaddrHigh(physaddr);
1086 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1087 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1088 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1090 le32_to_cpu(putPaddrLow(physaddr));
1092 le32_to_cpu(putPaddrHigh(physaddr));
1099 * Finish initializing those IOCB fields that are dependent on the
1100 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1101 * explicitly reinitialized and for SLI-3 the extended bde count is
1102 * explicitly reinitialized since all iocb memory resources are reused.
1104 if (phba->sli_rev == 3 &&
1105 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1106 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1107 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1109 * The extended IOCB format can only fit 3 BDE or a BPL.
1110 * This I/O has more than 3 BDE so the 1st data bde will
1111 * be a BPL that is filled in here.
1113 physaddr = lpfc_cmd->dma_handle;
1114 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1115 data_bde->tus.f.bdeSize = (num_bde *
1116 sizeof(struct ulp_bde64));
1117 physaddr += (sizeof(struct fcp_cmnd) +
1118 sizeof(struct fcp_rsp) +
1119 (2 * sizeof(struct ulp_bde64)));
1120 data_bde->addrHigh = putPaddrHigh(physaddr);
1121 data_bde->addrLow = putPaddrLow(physaddr);
1122 /* ebde count includes the responce bde and data bpl */
1123 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1125 /* ebde count includes the responce bde and data bdes */
1126 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1129 iocb_cmd->un.fcpi64.bdl.bdeSize =
1130 ((num_bde + 2) * sizeof(struct ulp_bde64));
1131 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1133 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1136 * Due to difference in data length between DIF/non-DIF paths,
1137 * we need to set word 4 of IOCB here
1139 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1144 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1145 * @sc: The SCSI command to examine
1146 * @txopt: (out) BlockGuard operation for transmitted data
1147 * @rxopt: (out) BlockGuard operation for received data
1149 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1153 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1154 uint8_t *txop, uint8_t *rxop)
1156 uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1159 if (guard_type == SHOST_DIX_GUARD_IP) {
1160 switch (scsi_get_prot_op(sc)) {
1161 case SCSI_PROT_READ_INSERT:
1162 case SCSI_PROT_WRITE_STRIP:
1163 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1164 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1167 case SCSI_PROT_READ_STRIP:
1168 case SCSI_PROT_WRITE_INSERT:
1169 *txop = BG_OP_IN_NODIF_OUT_CRC;
1170 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1173 case SCSI_PROT_READ_PASS:
1174 case SCSI_PROT_WRITE_PASS:
1175 *txop = BG_OP_IN_CSUM_OUT_CRC;
1176 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1179 case SCSI_PROT_NORMAL:
1181 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1182 "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1183 scsi_get_prot_op(sc), guard_type);
1188 } else if (guard_type == SHOST_DIX_GUARD_CRC) {
1189 switch (scsi_get_prot_op(sc)) {
1190 case SCSI_PROT_READ_STRIP:
1191 case SCSI_PROT_WRITE_INSERT:
1192 *txop = BG_OP_IN_NODIF_OUT_CRC;
1193 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1196 case SCSI_PROT_READ_PASS:
1197 case SCSI_PROT_WRITE_PASS:
1198 *txop = BG_OP_IN_CRC_OUT_CRC;
1199 *rxop = BG_OP_IN_CRC_OUT_CRC;
1202 case SCSI_PROT_READ_INSERT:
1203 case SCSI_PROT_WRITE_STRIP:
1204 case SCSI_PROT_NORMAL:
1206 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1207 "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1208 scsi_get_prot_op(sc), guard_type);
1213 /* unsupported format */
1220 struct scsi_dif_tuple {
1221 __be16 guard_tag; /* Checksum */
1222 __be16 app_tag; /* Opaque storage */
1223 __be32 ref_tag; /* Target LBA or indirect LBA */
1226 static inline unsigned
1227 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1229 return sc->device->sector_size;
1233 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
1234 * @sc: in: SCSI command
1235 * @apptagmask: out: app tag mask
1236 * @apptagval: out: app tag value
1237 * @reftag: out: ref tag (reference tag)
1240 * Extract DIF parameters from the command if possible. Otherwise,
1241 * use default parameters.
1245 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
1246 uint16_t *apptagval, uint32_t *reftag)
1248 struct scsi_dif_tuple *spt;
1249 unsigned char op = scsi_get_prot_op(sc);
1250 unsigned int protcnt = scsi_prot_sg_count(sc);
1253 if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1254 op == SCSI_PROT_WRITE_PASS)) {
1257 spt = page_address(sg_page(scsi_prot_sglist(sc))) +
1258 scsi_prot_sglist(sc)[0].offset;
1261 *reftag = cpu_to_be32(spt->ref_tag);
1264 /* SBC defines ref tag to be lower 32bits of LBA */
1265 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
1272 * This function sets up buffer list for protection groups of
1273 * type LPFC_PG_TYPE_NO_DIF
1275 * This is usually used when the HBA is instructed to generate
1276 * DIFs and insert them into data stream (or strip DIF from
1277 * incoming data stream)
1279 * The buffer list consists of just one protection group described
1281 * +-------------------------+
1282 * start of prot group --> | PDE_5 |
1283 * +-------------------------+
1285 * +-------------------------+
1287 * +-------------------------+
1288 * |more Data BDE's ... (opt)|
1289 * +-------------------------+
1291 * @sc: pointer to scsi command we're working on
1292 * @bpl: pointer to buffer list for protection groups
1293 * @datacnt: number of segments of data that have been dma mapped
1295 * Note: Data s/g buffers have been dma mapped
1298 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1299 struct ulp_bde64 *bpl, int datasegcnt)
1301 struct scatterlist *sgde = NULL; /* s/g data entry */
1302 struct lpfc_pde5 *pde5 = NULL;
1303 struct lpfc_pde6 *pde6 = NULL;
1304 dma_addr_t physaddr;
1305 int i = 0, num_bde = 0, status;
1306 int datadir = sc->sc_data_direction;
1309 uint16_t apptagmask, apptagval;
1312 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1316 /* extract some info from the scsi command for pde*/
1317 blksize = lpfc_cmd_blksize(sc);
1318 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1320 /* setup PDE5 with what we have */
1321 pde5 = (struct lpfc_pde5 *) bpl;
1322 memset(pde5, 0, sizeof(struct lpfc_pde5));
1323 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1324 pde5->reftag = reftag;
1326 /* advance bpl and increment bde count */
1329 pde6 = (struct lpfc_pde6 *) bpl;
1331 /* setup PDE6 with the rest of the info */
1332 memset(pde6, 0, sizeof(struct lpfc_pde6));
1333 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1334 bf_set(pde6_optx, pde6, txop);
1335 bf_set(pde6_oprx, pde6, rxop);
1336 if (datadir == DMA_FROM_DEVICE) {
1337 bf_set(pde6_ce, pde6, 1);
1338 bf_set(pde6_re, pde6, 1);
1339 bf_set(pde6_ae, pde6, 1);
1341 bf_set(pde6_ai, pde6, 1);
1342 bf_set(pde6_apptagval, pde6, apptagval);
1344 /* advance bpl and increment bde count */
1348 /* assumption: caller has already run dma_map_sg on command data */
1349 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1350 physaddr = sg_dma_address(sgde);
1351 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1352 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1353 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1354 if (datadir == DMA_TO_DEVICE)
1355 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1357 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1358 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1368 * This function sets up buffer list for protection groups of
1369 * type LPFC_PG_TYPE_DIF_BUF
1371 * This is usually used when DIFs are in their own buffers,
1372 * separate from the data. The HBA can then by instructed
1373 * to place the DIFs in the outgoing stream. For read operations,
1374 * The HBA could extract the DIFs and place it in DIF buffers.
1376 * The buffer list for this type consists of one or more of the
1377 * protection groups described below:
1378 * +-------------------------+
1379 * start of first prot group --> | PDE_5 |
1380 * +-------------------------+
1382 * +-------------------------+
1383 * | PDE_7 (Prot BDE) |
1384 * +-------------------------+
1386 * +-------------------------+
1387 * |more Data BDE's ... (opt)|
1388 * +-------------------------+
1389 * start of new prot group --> | PDE_5 |
1390 * +-------------------------+
1392 * +-------------------------+
1394 * @sc: pointer to scsi command we're working on
1395 * @bpl: pointer to buffer list for protection groups
1396 * @datacnt: number of segments of data that have been dma mapped
1397 * @protcnt: number of segment of protection data that have been dma mapped
1399 * Note: It is assumed that both data and protection s/g buffers have been
1403 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1404 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1406 struct scatterlist *sgde = NULL; /* s/g data entry */
1407 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1408 struct lpfc_pde5 *pde5 = NULL;
1409 struct lpfc_pde6 *pde6 = NULL;
1410 struct ulp_bde64 *prot_bde = NULL;
1411 dma_addr_t dataphysaddr, protphysaddr;
1412 unsigned short curr_data = 0, curr_prot = 0;
1413 unsigned int split_offset, protgroup_len;
1414 unsigned int protgrp_blks, protgrp_bytes;
1415 unsigned int remainder, subtotal;
1417 int datadir = sc->sc_data_direction;
1418 unsigned char pgdone = 0, alldone = 0;
1421 uint16_t apptagmask, apptagval;
1425 sgpe = scsi_prot_sglist(sc);
1426 sgde = scsi_sglist(sc);
1428 if (!sgpe || !sgde) {
1429 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1430 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1435 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1439 /* extract some info from the scsi command */
1440 blksize = lpfc_cmd_blksize(sc);
1441 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1445 /* setup PDE5 with what we have */
1446 pde5 = (struct lpfc_pde5 *) bpl;
1447 memset(pde5, 0, sizeof(struct lpfc_pde5));
1448 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1449 pde5->reftag = reftag;
1451 /* advance bpl and increment bde count */
1454 pde6 = (struct lpfc_pde6 *) bpl;
1456 /* setup PDE6 with the rest of the info */
1457 memset(pde6, 0, sizeof(struct lpfc_pde6));
1458 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1459 bf_set(pde6_optx, pde6, txop);
1460 bf_set(pde6_oprx, pde6, rxop);
1461 bf_set(pde6_ce, pde6, 1);
1462 bf_set(pde6_re, pde6, 1);
1463 bf_set(pde6_ae, pde6, 1);
1464 bf_set(pde6_ai, pde6, 1);
1465 bf_set(pde6_apptagval, pde6, apptagval);
1467 /* advance bpl and increment bde count */
1471 /* setup the first BDE that points to protection buffer */
1472 prot_bde = (struct ulp_bde64 *) bpl;
1473 protphysaddr = sg_dma_address(sgpe);
1474 prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1475 prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1476 protgroup_len = sg_dma_len(sgpe);
1479 /* must be integer multiple of the DIF block length */
1480 BUG_ON(protgroup_len % 8);
1482 protgrp_blks = protgroup_len / 8;
1483 protgrp_bytes = protgrp_blks * blksize;
1485 prot_bde->tus.f.bdeSize = protgroup_len;
1486 prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
1487 prot_bde->tus.w = le32_to_cpu(bpl->tus.w);
1492 /* setup BDE's for data blocks associated with DIF data */
1494 subtotal = 0; /* total bytes processed for current prot grp */
1497 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1498 "9065 BLKGRD:%s Invalid data segment\n",
1503 dataphysaddr = sg_dma_address(sgde) + split_offset;
1504 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1505 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1507 remainder = sg_dma_len(sgde) - split_offset;
1509 if ((subtotal + remainder) <= protgrp_bytes) {
1510 /* we can use this whole buffer */
1511 bpl->tus.f.bdeSize = remainder;
1514 if ((subtotal + remainder) == protgrp_bytes)
1517 /* must split this buffer with next prot grp */
1518 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1519 split_offset += bpl->tus.f.bdeSize;
1522 subtotal += bpl->tus.f.bdeSize;
1524 if (datadir == DMA_TO_DEVICE)
1525 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1527 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1528 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1536 /* Move to the next s/g segment if possible */
1537 sgde = sg_next(sgde);
1542 if (curr_prot == protcnt) {
1544 } else if (curr_prot < protcnt) {
1545 /* advance to next prot buffer */
1546 sgpe = sg_next(sgpe);
1549 /* update the reference tag */
1550 reftag += protgrp_blks;
1552 /* if we're here, we have a bug */
1553 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1554 "9054 BLKGRD: bug in %s\n", __func__);
1564 * Given a SCSI command that supports DIF, determine composition of protection
1565 * groups involved in setting up buffer lists
1568 * for DIF (for both read and write)
1571 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1573 int ret = LPFC_PG_TYPE_INVALID;
1574 unsigned char op = scsi_get_prot_op(sc);
1577 case SCSI_PROT_READ_STRIP:
1578 case SCSI_PROT_WRITE_INSERT:
1579 ret = LPFC_PG_TYPE_NO_DIF;
1581 case SCSI_PROT_READ_INSERT:
1582 case SCSI_PROT_WRITE_STRIP:
1583 case SCSI_PROT_READ_PASS:
1584 case SCSI_PROT_WRITE_PASS:
1585 ret = LPFC_PG_TYPE_DIF_BUF;
1588 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1589 "9021 Unsupported protection op:%d\n", op);
1597 * This is the protection/DIF aware version of
1598 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1599 * two functions eventually, but for now, it's here
1602 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1603 struct lpfc_scsi_buf *lpfc_cmd)
1605 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1606 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1607 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1608 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1609 uint32_t num_bde = 0;
1610 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1611 int prot_group_type = 0;
1616 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1617 * fcp_rsp regions to the first data bde entry
1620 if (scsi_sg_count(scsi_cmnd)) {
1622 * The driver stores the segment count returned from pci_map_sg
1623 * because this a count of dma-mappings used to map the use_sg
1624 * pages. They are not guaranteed to be the same for those
1625 * architectures that implement an IOMMU.
1627 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1628 scsi_sglist(scsi_cmnd),
1629 scsi_sg_count(scsi_cmnd), datadir);
1630 if (unlikely(!datasegcnt))
1633 lpfc_cmd->seg_cnt = datasegcnt;
1634 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1635 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1636 "9067 BLKGRD: %s: Too many sg segments"
1637 " from dma_map_sg. Config %d, seg_cnt"
1639 __func__, phba->cfg_sg_seg_cnt,
1641 scsi_dma_unmap(scsi_cmnd);
1645 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1647 switch (prot_group_type) {
1648 case LPFC_PG_TYPE_NO_DIF:
1649 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1651 /* we should have 2 or more entries in buffer list */
1655 case LPFC_PG_TYPE_DIF_BUF:{
1657 * This type indicates that protection buffers are
1658 * passed to the driver, so that needs to be prepared
1661 protsegcnt = dma_map_sg(&phba->pcidev->dev,
1662 scsi_prot_sglist(scsi_cmnd),
1663 scsi_prot_sg_count(scsi_cmnd), datadir);
1664 if (unlikely(!protsegcnt)) {
1665 scsi_dma_unmap(scsi_cmnd);
1669 lpfc_cmd->prot_seg_cnt = protsegcnt;
1670 if (lpfc_cmd->prot_seg_cnt
1671 > phba->cfg_prot_sg_seg_cnt) {
1672 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1673 "9068 BLKGRD: %s: Too many prot sg "
1674 "segments from dma_map_sg. Config %d,"
1675 "prot_seg_cnt %d\n", __func__,
1676 phba->cfg_prot_sg_seg_cnt,
1677 lpfc_cmd->prot_seg_cnt);
1678 dma_unmap_sg(&phba->pcidev->dev,
1679 scsi_prot_sglist(scsi_cmnd),
1680 scsi_prot_sg_count(scsi_cmnd),
1682 scsi_dma_unmap(scsi_cmnd);
1686 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1687 datasegcnt, protsegcnt);
1688 /* we should have 3 or more entries in buffer list */
1693 case LPFC_PG_TYPE_INVALID:
1695 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1696 "9022 Unexpected protection group %i\n",
1703 * Finish initializing those IOCB fields that are dependent on the
1704 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
1705 * reinitialized since all iocb memory resources are used many times
1706 * for transmit, receive, and continuation bpl's.
1708 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1709 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1710 iocb_cmd->ulpBdeCount = 1;
1711 iocb_cmd->ulpLe = 1;
1713 fcpdl = scsi_bufflen(scsi_cmnd);
1715 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1717 * We are in DIF Type 1 mode
1718 * Every data block has a 8 byte DIF (trailer)
1719 * attached to it. Must ajust FCP data length
1721 blksize = lpfc_cmd_blksize(scsi_cmnd);
1722 diflen = (fcpdl / blksize) * 8;
1725 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1728 * Due to difference in data length between DIF/non-DIF paths,
1729 * we need to set word 4 of IOCB here
1731 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1735 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1736 "9023 Could not setup all needed BDE's"
1737 "prot_group_type=%d, num_bde=%d\n",
1738 prot_group_type, num_bde);
1743 * This function checks for BlockGuard errors detected by
1744 * the HBA. In case of errors, the ASC/ASCQ fields in the
1745 * sense buffer will be set accordingly, paired with
1746 * ILLEGAL_REQUEST to signal to the kernel that the HBA
1747 * detected corruption.
1750 * 0 - No error found
1751 * 1 - BlockGuard error found
1752 * -1 - Internal error (bad profile, ...etc)
1755 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1756 struct lpfc_iocbq *pIocbOut)
1758 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1759 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1761 uint32_t bghm = bgf->bghm;
1762 uint32_t bgstat = bgf->bgstat;
1763 uint64_t failing_sector = 0;
1765 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1766 " 0x%x lba 0x%llx blk cnt 0x%x "
1767 "bgstat=0x%x bghm=0x%x\n",
1768 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1769 blk_rq_sectors(cmd->request), bgstat, bghm);
1771 spin_lock(&_dump_buf_lock);
1772 if (!_dump_buf_done) {
1773 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
1774 " Data for %u blocks to debugfs\n",
1775 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1776 lpfc_debug_save_data(phba, cmd);
1778 /* If we have a prot sgl, save the DIF buffer */
1779 if (lpfc_prot_group_type(phba, cmd) ==
1780 LPFC_PG_TYPE_DIF_BUF) {
1781 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1782 "Saving DIF for %u blocks to debugfs\n",
1783 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1784 lpfc_debug_save_dif(phba, cmd);
1789 spin_unlock(&_dump_buf_lock);
1791 if (lpfc_bgs_get_invalid_prof(bgstat)) {
1792 cmd->result = ScsiResult(DID_ERROR, 0);
1793 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1794 " BlockGuard profile. bgstat:0x%x\n",
1800 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1801 cmd->result = ScsiResult(DID_ERROR, 0);
1802 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1803 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1809 if (lpfc_bgs_get_guard_err(bgstat)) {
1812 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1814 cmd->result = DRIVER_SENSE << 24
1815 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1816 phba->bg_guard_err_cnt++;
1817 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1818 "9055 BLKGRD: guard_tag error\n");
1821 if (lpfc_bgs_get_reftag_err(bgstat)) {
1824 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1826 cmd->result = DRIVER_SENSE << 24
1827 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1829 phba->bg_reftag_err_cnt++;
1830 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1831 "9056 BLKGRD: ref_tag error\n");
1834 if (lpfc_bgs_get_apptag_err(bgstat)) {
1837 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1839 cmd->result = DRIVER_SENSE << 24
1840 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1842 phba->bg_apptag_err_cnt++;
1843 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1844 "9061 BLKGRD: app_tag error\n");
1847 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1849 * setup sense data descriptor 0 per SPC-4 as an information
1850 * field, and put the failing LBA in it
1852 cmd->sense_buffer[8] = 0; /* Information */
1853 cmd->sense_buffer[9] = 0xa; /* Add. length */
1854 bghm /= cmd->device->sector_size;
1856 failing_sector = scsi_get_lba(cmd);
1857 failing_sector += bghm;
1859 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
1863 /* No error was reported - problem in FW? */
1864 cmd->result = ScsiResult(DID_ERROR, 0);
1865 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1866 "9057 BLKGRD: no errors reported!\n");
1874 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
1875 * @phba: The Hba for which this call is being executed.
1876 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1878 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1879 * field of @lpfc_cmd for device with SLI-4 interface spec.
1886 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1888 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1889 struct scatterlist *sgel = NULL;
1890 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1891 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
1892 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1893 dma_addr_t physaddr;
1894 uint32_t num_bde = 0;
1896 uint32_t dma_offset = 0;
1900 * There are three possibilities here - use scatter-gather segment, use
1901 * the single mapping, or neither. Start the lpfc command prep by
1902 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1905 if (scsi_sg_count(scsi_cmnd)) {
1907 * The driver stores the segment count returned from pci_map_sg
1908 * because this a count of dma-mappings used to map the use_sg
1909 * pages. They are not guaranteed to be the same for those
1910 * architectures that implement an IOMMU.
1913 nseg = scsi_dma_map(scsi_cmnd);
1914 if (unlikely(!nseg))
1917 /* clear the last flag in the fcp_rsp map entry */
1918 sgl->word2 = le32_to_cpu(sgl->word2);
1919 bf_set(lpfc_sli4_sge_last, sgl, 0);
1920 sgl->word2 = cpu_to_le32(sgl->word2);
1923 lpfc_cmd->seg_cnt = nseg;
1924 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1925 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
1926 " %s: Too many sg segments from "
1927 "dma_map_sg. Config %d, seg_cnt %d\n",
1928 __func__, phba->cfg_sg_seg_cnt,
1930 scsi_dma_unmap(scsi_cmnd);
1935 * The driver established a maximum scatter-gather segment count
1936 * during probe that limits the number of sg elements in any
1937 * single scsi command. Just run through the seg_cnt and format
1939 * When using SLI-3 the driver will try to fit all the BDEs into
1940 * the IOCB. If it can't then the BDEs get added to a BPL as it
1941 * does for SLI-2 mode.
1943 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1944 physaddr = sg_dma_address(sgel);
1945 dma_len = sg_dma_len(sgel);
1946 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1947 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1948 if ((num_bde + 1) == nseg)
1949 bf_set(lpfc_sli4_sge_last, sgl, 1);
1951 bf_set(lpfc_sli4_sge_last, sgl, 0);
1952 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1953 sgl->word2 = cpu_to_le32(sgl->word2);
1954 sgl->sge_len = cpu_to_le32(dma_len);
1955 dma_offset += dma_len;
1960 /* clear the last flag in the fcp_rsp map entry */
1961 sgl->word2 = le32_to_cpu(sgl->word2);
1962 bf_set(lpfc_sli4_sge_last, sgl, 1);
1963 sgl->word2 = cpu_to_le32(sgl->word2);
1967 * Finish initializing those IOCB fields that are dependent on the
1968 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1969 * explicitly reinitialized.
1970 * all iocb memory resources are reused.
1972 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1975 * Due to difference in data length between DIF/non-DIF paths,
1976 * we need to set word 4 of IOCB here
1978 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1983 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
1984 * @phba: The Hba for which this call is being executed.
1985 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1987 * This routine wraps the actual DMA mapping function pointer from the
1995 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1997 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2001 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2002 * @phba: Pointer to hba context object.
2003 * @vport: Pointer to vport object.
2004 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2005 * @rsp_iocb: Pointer to response iocb object which reported error.
2007 * This function posts an event when there is a SCSI command reporting
2008 * error from the scsi device.
2011 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2012 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2013 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2014 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2015 uint32_t resp_info = fcprsp->rspStatus2;
2016 uint32_t scsi_status = fcprsp->rspStatus3;
2017 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2018 struct lpfc_fast_path_event *fast_path_evt = NULL;
2019 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2020 unsigned long flags;
2022 /* If there is queuefull or busy condition send a scsi event */
2023 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2024 (cmnd->result == SAM_STAT_BUSY)) {
2025 fast_path_evt = lpfc_alloc_fast_evt(phba);
2028 fast_path_evt->un.scsi_evt.event_type =
2030 fast_path_evt->un.scsi_evt.subcategory =
2031 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2032 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2033 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2034 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2035 &pnode->nlp_portname, sizeof(struct lpfc_name));
2036 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2037 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2038 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2039 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2040 fast_path_evt = lpfc_alloc_fast_evt(phba);
2043 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2045 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2046 LPFC_EVENT_CHECK_COND;
2047 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2049 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2050 &pnode->nlp_portname, sizeof(struct lpfc_name));
2051 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2052 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2053 fast_path_evt->un.check_cond_evt.sense_key =
2054 cmnd->sense_buffer[2] & 0xf;
2055 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2056 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2057 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2059 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2060 ((scsi_status == SAM_STAT_GOOD) &&
2061 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2063 * If status is good or resid does not match with fcp_param and
2064 * there is valid fcpi_parm, then there is a read_check error
2066 fast_path_evt = lpfc_alloc_fast_evt(phba);
2069 fast_path_evt->un.read_check_error.header.event_type =
2070 FC_REG_FABRIC_EVENT;
2071 fast_path_evt->un.read_check_error.header.subcategory =
2072 LPFC_EVENT_FCPRDCHKERR;
2073 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2074 &pnode->nlp_portname, sizeof(struct lpfc_name));
2075 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2076 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2077 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2078 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2079 fast_path_evt->un.read_check_error.fcpiparam =
2084 fast_path_evt->vport = vport;
2085 spin_lock_irqsave(&phba->hbalock, flags);
2086 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2087 spin_unlock_irqrestore(&phba->hbalock, flags);
2088 lpfc_worker_wake_up(phba);
2093 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2094 * @phba: The HBA for which this call is being executed.
2095 * @psb: The scsi buffer which is going to be un-mapped.
2097 * This routine does DMA un-mapping of scatter gather list of scsi command
2098 * field of @lpfc_cmd for device with SLI-3 interface spec.
2101 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2104 * There are only two special cases to consider. (1) the scsi command
2105 * requested scatter-gather usage or (2) the scsi command allocated
2106 * a request buffer, but did not request use_sg. There is a third
2107 * case, but it does not require resource deallocation.
2109 if (psb->seg_cnt > 0)
2110 scsi_dma_unmap(psb->pCmd);
2111 if (psb->prot_seg_cnt > 0)
2112 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2113 scsi_prot_sg_count(psb->pCmd),
2114 psb->pCmd->sc_data_direction);
2118 * lpfc_handler_fcp_err - FCP response handler
2119 * @vport: The virtual port for which this call is being executed.
2120 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2121 * @rsp_iocb: The response IOCB which contains FCP error.
2123 * This routine is called to process response IOCB with status field
2124 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2125 * based upon SCSI and FCP error.
2128 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2129 struct lpfc_iocbq *rsp_iocb)
2131 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2132 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2133 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2134 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2135 uint32_t resp_info = fcprsp->rspStatus2;
2136 uint32_t scsi_status = fcprsp->rspStatus3;
2138 uint32_t host_status = DID_OK;
2139 uint32_t rsplen = 0;
2140 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2144 * If this is a task management command, there is no
2145 * scsi packet associated with this lpfc_cmd. The driver
2148 if (fcpcmd->fcpCntl2) {
2153 if (resp_info & RSP_LEN_VALID) {
2154 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2155 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2156 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2157 "2719 Invalid response length: "
2158 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2160 cmnd->device->lun, cmnd->cmnd[0],
2162 host_status = DID_ERROR;
2165 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2166 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2167 "2757 Protocol failure detected during "
2168 "processing of FCP I/O op: "
2169 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2171 cmnd->device->lun, cmnd->cmnd[0],
2173 host_status = DID_ERROR;
2178 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2179 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2180 if (snslen > SCSI_SENSE_BUFFERSIZE)
2181 snslen = SCSI_SENSE_BUFFERSIZE;
2183 if (resp_info & RSP_LEN_VALID)
2184 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2185 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2187 lp = (uint32_t *)cmnd->sense_buffer;
2189 if (!scsi_status && (resp_info & RESID_UNDER))
2192 lpfc_printf_vlog(vport, KERN_WARNING, logit,
2193 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2194 "Data: x%x x%x x%x x%x x%x\n",
2195 cmnd->cmnd[0], scsi_status,
2196 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2197 be32_to_cpu(fcprsp->rspResId),
2198 be32_to_cpu(fcprsp->rspSnsLen),
2199 be32_to_cpu(fcprsp->rspRspLen),
2202 scsi_set_resid(cmnd, 0);
2203 if (resp_info & RESID_UNDER) {
2204 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2206 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2207 "9025 FCP Read Underrun, expected %d, "
2208 "residual %d Data: x%x x%x x%x\n",
2209 be32_to_cpu(fcpcmd->fcpDl),
2210 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2214 * If there is an under run check if under run reported by
2215 * storage array is same as the under run reported by HBA.
2216 * If this is not same, there is a dropped frame.
2218 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2220 (scsi_get_resid(cmnd) != fcpi_parm)) {
2221 lpfc_printf_vlog(vport, KERN_WARNING,
2222 LOG_FCP | LOG_FCP_ERROR,
2223 "9026 FCP Read Check Error "
2224 "and Underrun Data: x%x x%x x%x x%x\n",
2225 be32_to_cpu(fcpcmd->fcpDl),
2226 scsi_get_resid(cmnd), fcpi_parm,
2228 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2229 host_status = DID_ERROR;
2232 * The cmnd->underflow is the minimum number of bytes that must
2233 * be transfered for this command. Provided a sense condition
2234 * is not present, make sure the actual amount transferred is at
2235 * least the underflow value or fail.
2237 if (!(resp_info & SNS_LEN_VALID) &&
2238 (scsi_status == SAM_STAT_GOOD) &&
2239 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2240 < cmnd->underflow)) {
2241 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2242 "9027 FCP command x%x residual "
2243 "underrun converted to error "
2244 "Data: x%x x%x x%x\n",
2245 cmnd->cmnd[0], scsi_bufflen(cmnd),
2246 scsi_get_resid(cmnd), cmnd->underflow);
2247 host_status = DID_ERROR;
2249 } else if (resp_info & RESID_OVER) {
2250 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2251 "9028 FCP command x%x residual overrun error. "
2252 "Data: x%x x%x\n", cmnd->cmnd[0],
2253 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2254 host_status = DID_ERROR;
2257 * Check SLI validation that all the transfer was actually done
2258 * (fcpi_parm should be zero). Apply check only to reads.
2260 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
2261 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2262 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2263 "9029 FCP Read Check Error Data: "
2264 "x%x x%x x%x x%x\n",
2265 be32_to_cpu(fcpcmd->fcpDl),
2266 be32_to_cpu(fcprsp->rspResId),
2267 fcpi_parm, cmnd->cmnd[0]);
2268 host_status = DID_ERROR;
2269 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2273 cmnd->result = ScsiResult(host_status, scsi_status);
2274 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2278 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2279 * @phba: The Hba for which this call is being executed.
2280 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2281 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2283 * This routine assigns scsi command result by looking into response IOCB
2284 * status field appropriately. This routine handles QUEUE FULL condition as
2285 * well by ramping down device queue depth.
2288 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2289 struct lpfc_iocbq *pIocbOut)
2291 struct lpfc_scsi_buf *lpfc_cmd =
2292 (struct lpfc_scsi_buf *) pIocbIn->context1;
2293 struct lpfc_vport *vport = pIocbIn->vport;
2294 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2295 struct lpfc_nodelist *pnode = rdata->pnode;
2296 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2298 struct scsi_device *tmp_sdev;
2300 unsigned long flags;
2301 struct lpfc_fast_path_event *fast_path_evt;
2302 struct Scsi_Host *shost = cmd->device->host;
2303 uint32_t queue_depth, scsi_id;
2305 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2306 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2307 /* pick up SLI4 exhange busy status from HBA */
2308 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2310 if (pnode && NLP_CHK_NODE_ACT(pnode))
2311 atomic_dec(&pnode->cmd_pending);
2313 if (lpfc_cmd->status) {
2314 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2315 (lpfc_cmd->result & IOERR_DRVR_MASK))
2316 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2317 else if (lpfc_cmd->status >= IOSTAT_CNT)
2318 lpfc_cmd->status = IOSTAT_DEFAULT;
2320 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2321 "9030 FCP cmd x%x failed <%d/%d> "
2322 "status: x%x result: x%x Data: x%x x%x\n",
2324 cmd->device ? cmd->device->id : 0xffff,
2325 cmd->device ? cmd->device->lun : 0xffff,
2326 lpfc_cmd->status, lpfc_cmd->result,
2327 pIocbOut->iocb.ulpContext,
2328 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2330 switch (lpfc_cmd->status) {
2331 case IOSTAT_FCP_RSP_ERROR:
2332 /* Call FCP RSP handler to determine result */
2333 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2335 case IOSTAT_NPORT_BSY:
2336 case IOSTAT_FABRIC_BSY:
2337 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2338 fast_path_evt = lpfc_alloc_fast_evt(phba);
2341 fast_path_evt->un.fabric_evt.event_type =
2342 FC_REG_FABRIC_EVENT;
2343 fast_path_evt->un.fabric_evt.subcategory =
2344 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2345 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2346 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2347 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2348 &pnode->nlp_portname,
2349 sizeof(struct lpfc_name));
2350 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2351 &pnode->nlp_nodename,
2352 sizeof(struct lpfc_name));
2354 fast_path_evt->vport = vport;
2355 fast_path_evt->work_evt.evt =
2356 LPFC_EVT_FASTPATH_MGMT_EVT;
2357 spin_lock_irqsave(&phba->hbalock, flags);
2358 list_add_tail(&fast_path_evt->work_evt.evt_listp,
2360 spin_unlock_irqrestore(&phba->hbalock, flags);
2361 lpfc_worker_wake_up(phba);
2363 case IOSTAT_LOCAL_REJECT:
2364 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2365 lpfc_cmd->result == IOERR_NO_RESOURCES ||
2366 lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
2367 cmd->result = ScsiResult(DID_REQUEUE, 0);
2371 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2372 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2373 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2374 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2376 * This is a response for a BG enabled
2377 * cmd. Parse BG error
2379 lpfc_parse_bg_err(phba, lpfc_cmd,
2383 lpfc_printf_vlog(vport, KERN_WARNING,
2385 "9031 non-zero BGSTAT "
2386 "on unprotected cmd\n");
2390 /* else: fall through */
2392 cmd->result = ScsiResult(DID_ERROR, 0);
2396 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2397 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2398 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2401 cmd->result = ScsiResult(DID_OK, 0);
2404 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2405 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2407 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2408 "0710 Iodone <%d/%d> cmd %p, error "
2409 "x%x SNS x%x x%x Data: x%x x%x\n",
2410 cmd->device->id, cmd->device->lun, cmd,
2411 cmd->result, *lp, *(lp + 3), cmd->retries,
2412 scsi_get_resid(cmd));
2415 lpfc_update_stats(phba, lpfc_cmd);
2416 result = cmd->result;
2417 if (vport->cfg_max_scsicmpl_time &&
2418 time_after(jiffies, lpfc_cmd->start_time +
2419 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2420 spin_lock_irqsave(shost->host_lock, flags);
2421 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2422 if (pnode->cmd_qdepth >
2423 atomic_read(&pnode->cmd_pending) &&
2424 (atomic_read(&pnode->cmd_pending) >
2425 LPFC_MIN_TGT_QDEPTH) &&
2426 ((cmd->cmnd[0] == READ_10) ||
2427 (cmd->cmnd[0] == WRITE_10)))
2429 atomic_read(&pnode->cmd_pending);
2431 pnode->last_change_time = jiffies;
2433 spin_unlock_irqrestore(shost->host_lock, flags);
2434 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2435 if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
2436 time_after(jiffies, pnode->last_change_time +
2437 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2438 spin_lock_irqsave(shost->host_lock, flags);
2439 pnode->cmd_qdepth += pnode->cmd_qdepth *
2440 LPFC_TGTQ_RAMPUP_PCENT / 100;
2441 if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
2442 pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
2443 pnode->last_change_time = jiffies;
2444 spin_unlock_irqrestore(shost->host_lock, flags);
2448 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2450 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2451 queue_depth = cmd->device->queue_depth;
2452 scsi_id = cmd->device->id;
2453 cmd->scsi_done(cmd);
2455 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2457 * If there is a thread waiting for command completion
2458 * wake up the thread.
2460 spin_lock_irqsave(shost->host_lock, flags);
2461 lpfc_cmd->pCmd = NULL;
2462 if (lpfc_cmd->waitq)
2463 wake_up(lpfc_cmd->waitq);
2464 spin_unlock_irqrestore(shost->host_lock, flags);
2465 lpfc_release_scsi_buf(phba, lpfc_cmd);
2470 lpfc_rampup_queue_depth(vport, queue_depth);
2473 * Check for queue full. If the lun is reporting queue full, then
2474 * back off the lun queue depth to prevent target overloads.
2476 if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2477 NLP_CHK_NODE_ACT(pnode)) {
2478 shost_for_each_device(tmp_sdev, shost) {
2479 if (tmp_sdev->id != scsi_id)
2481 depth = scsi_track_queue_full(tmp_sdev,
2482 tmp_sdev->queue_depth-1);
2485 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2486 "0711 detected queue full - lun queue "
2487 "depth adjusted to %d.\n", depth);
2488 lpfc_send_sdev_queuedepth_change_event(phba, vport,
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);
2505 lpfc_release_scsi_buf(phba, lpfc_cmd);
2509 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2510 * @data: A pointer to the immediate command data portion of the IOCB.
2511 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2513 * The routine copies the entire FCP command from @fcp_cmnd to @data while
2514 * byte swapping the data to big endian format for transmission on the wire.
2517 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2520 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2521 i += sizeof(uint32_t), j++) {
2522 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2527 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2528 * @vport: The virtual port for which this call is being executed.
2529 * @lpfc_cmd: The scsi command which needs to send.
2530 * @pnode: Pointer to lpfc_nodelist.
2532 * This routine initializes fcp_cmnd and iocb data structure from scsi command
2533 * to transfer for device with SLI3 interface spec.
2536 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2537 struct lpfc_nodelist *pnode)
2539 struct lpfc_hba *phba = vport->phba;
2540 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2541 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2542 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2543 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2544 int datadir = scsi_cmnd->sc_data_direction;
2547 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2550 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2551 /* clear task management bits */
2552 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2554 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2555 &lpfc_cmd->fcp_cmnd->fcp_lun);
2557 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2559 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2561 case HEAD_OF_QUEUE_TAG:
2562 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2564 case ORDERED_QUEUE_TAG:
2565 fcp_cmnd->fcpCntl1 = ORDERED_Q;
2568 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2572 fcp_cmnd->fcpCntl1 = 0;
2575 * There are three possibilities here - use scatter-gather segment, use
2576 * the single mapping, or neither. Start the lpfc command prep by
2577 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2580 if (scsi_sg_count(scsi_cmnd)) {
2581 if (datadir == DMA_TO_DEVICE) {
2582 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2583 if (phba->sli_rev < LPFC_SLI_REV4) {
2584 iocb_cmd->un.fcpi.fcpi_parm = 0;
2585 iocb_cmd->ulpPU = 0;
2587 iocb_cmd->ulpPU = PARM_READ_CHECK;
2588 fcp_cmnd->fcpCntl3 = WRITE_DATA;
2589 phba->fc4OutputRequests++;
2591 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2592 iocb_cmd->ulpPU = PARM_READ_CHECK;
2593 fcp_cmnd->fcpCntl3 = READ_DATA;
2594 phba->fc4InputRequests++;
2597 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2598 iocb_cmd->un.fcpi.fcpi_parm = 0;
2599 iocb_cmd->ulpPU = 0;
2600 fcp_cmnd->fcpCntl3 = 0;
2601 phba->fc4ControlRequests++;
2603 if (phba->sli_rev == 3 &&
2604 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2605 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2607 * Finish initializing those IOCB fields that are independent
2608 * of the scsi_cmnd request_buffer
2610 piocbq->iocb.ulpContext = pnode->nlp_rpi;
2611 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2612 piocbq->iocb.ulpFCP2Rcvy = 1;
2614 piocbq->iocb.ulpFCP2Rcvy = 0;
2616 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2617 piocbq->context1 = lpfc_cmd;
2618 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2619 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2620 piocbq->vport = vport;
2624 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2625 * @vport: The virtual port for which this call is being executed.
2626 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2627 * @lun: Logical unit number.
2628 * @task_mgmt_cmd: SCSI task management command.
2630 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2631 * for device with SLI-3 interface spec.
2638 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2639 struct lpfc_scsi_buf *lpfc_cmd,
2641 uint8_t task_mgmt_cmd)
2643 struct lpfc_iocbq *piocbq;
2645 struct fcp_cmnd *fcp_cmnd;
2646 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2647 struct lpfc_nodelist *ndlp = rdata->pnode;
2649 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2650 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2653 piocbq = &(lpfc_cmd->cur_iocbq);
2654 piocbq->vport = vport;
2656 piocb = &piocbq->iocb;
2658 fcp_cmnd = lpfc_cmd->fcp_cmnd;
2659 /* Clear out any old data in the FCP command area */
2660 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2661 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2662 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2663 if (vport->phba->sli_rev == 3 &&
2664 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2665 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2666 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2667 piocb->ulpContext = ndlp->nlp_rpi;
2668 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2669 piocb->ulpFCP2Rcvy = 1;
2671 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2673 /* ulpTimeout is only one byte */
2674 if (lpfc_cmd->timeout > 0xff) {
2676 * Do not timeout the command at the firmware level.
2677 * The driver will provide the timeout mechanism.
2679 piocb->ulpTimeout = 0;
2681 piocb->ulpTimeout = lpfc_cmd->timeout;
2683 if (vport->phba->sli_rev == LPFC_SLI_REV4)
2684 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2690 * lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
2691 * @phba: The hba struct for which this call is being executed.
2692 * @dev_grp: The HBA PCI-Device group number.
2694 * This routine sets up the SCSI interface API function jump table in @phba
2696 * Returns: 0 - success, -ENODEV - failure.
2699 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2702 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2703 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2704 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2707 case LPFC_PCI_DEV_LP:
2708 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2709 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2710 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2712 case LPFC_PCI_DEV_OC:
2713 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2714 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2715 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2718 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2719 "1418 Invalid HBA PCI-device group: 0x%x\n",
2724 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2725 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2726 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2731 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2732 * @phba: The Hba for which this call is being executed.
2733 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2734 * @rspiocbq: Pointer to lpfc_iocbq data structure.
2736 * This routine is IOCB completion routine for device reset and target reset
2737 * routine. This routine release scsi buffer associated with lpfc_cmd.
2740 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2741 struct lpfc_iocbq *cmdiocbq,
2742 struct lpfc_iocbq *rspiocbq)
2744 struct lpfc_scsi_buf *lpfc_cmd =
2745 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2747 lpfc_release_scsi_buf(phba, lpfc_cmd);
2752 * lpfc_info - Info entry point of scsi_host_template data structure
2753 * @host: The scsi host for which this call is being executed.
2755 * This routine provides module information about hba.
2758 * Pointer to char - Success.
2761 lpfc_info(struct Scsi_Host *host)
2763 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2764 struct lpfc_hba *phba = vport->phba;
2766 static char lpfcinfobuf[384];
2768 memset(lpfcinfobuf,0,384);
2769 if (phba && phba->pcidev){
2770 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2771 len = strlen(lpfcinfobuf);
2772 snprintf(lpfcinfobuf + len,
2774 " on PCI bus %02x device %02x irq %d",
2775 phba->pcidev->bus->number,
2776 phba->pcidev->devfn,
2778 len = strlen(lpfcinfobuf);
2779 if (phba->Port[0]) {
2780 snprintf(lpfcinfobuf + len,
2785 len = strlen(lpfcinfobuf);
2786 if (phba->sli4_hba.link_state.logical_speed) {
2787 snprintf(lpfcinfobuf + len,
2789 " Logical Link Speed: %d Mbps",
2790 phba->sli4_hba.link_state.logical_speed * 10);
2797 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2798 * @phba: The Hba for which this call is being executed.
2800 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
2801 * The default value of cfg_poll_tmo is 10 milliseconds.
2803 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2805 unsigned long poll_tmo_expires =
2806 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2808 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2809 mod_timer(&phba->fcp_poll_timer,
2814 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2815 * @phba: The Hba for which this call is being executed.
2817 * This routine starts the fcp_poll_timer of @phba.
2819 void lpfc_poll_start_timer(struct lpfc_hba * phba)
2821 lpfc_poll_rearm_timer(phba);
2825 * lpfc_poll_timeout - Restart polling timer
2826 * @ptr: Map to lpfc_hba data structure pointer.
2828 * This routine restarts fcp_poll timer, when FCP ring polling is enable
2829 * and FCP Ring interrupt is disable.
2832 void lpfc_poll_timeout(unsigned long ptr)
2834 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2836 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2837 lpfc_sli_handle_fast_ring_event(phba,
2838 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
2840 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
2841 lpfc_poll_rearm_timer(phba);
2846 * lpfc_queuecommand - scsi_host_template queuecommand entry point
2847 * @cmnd: Pointer to scsi_cmnd data structure.
2848 * @done: Pointer to done routine.
2850 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
2851 * This routine prepares an IOCB from scsi command and provides to firmware.
2852 * The @done callback is invoked after driver finished processing the command.
2856 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
2859 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
2861 struct Scsi_Host *shost = cmnd->device->host;
2862 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
2863 struct lpfc_hba *phba = vport->phba;
2864 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
2865 struct lpfc_nodelist *ndlp;
2866 struct lpfc_scsi_buf *lpfc_cmd;
2867 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
2870 err = fc_remote_port_chkready(rport);
2873 goto out_fail_command;
2875 ndlp = rdata->pnode;
2877 if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
2878 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2880 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2881 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
2882 " op:%02x str=%s without registering for"
2883 " BlockGuard - Rejecting command\n",
2884 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2885 dif_op_str[scsi_get_prot_op(cmnd)]);
2886 goto out_fail_command;
2890 * Catch race where our node has transitioned, but the
2891 * transport is still transitioning.
2893 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
2894 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2895 goto out_fail_command;
2897 if (vport->cfg_max_scsicmpl_time &&
2898 (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth))
2901 lpfc_cmd = lpfc_get_scsi_buf(phba);
2902 if (lpfc_cmd == NULL) {
2903 lpfc_rampdown_queue_depth(phba);
2905 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2906 "0707 driver's buffer pool is empty, "
2912 * Store the midlayer's command structure for the completion phase
2913 * and complete the command initialization.
2915 lpfc_cmd->pCmd = cmnd;
2916 lpfc_cmd->rdata = rdata;
2917 lpfc_cmd->timeout = 0;
2918 lpfc_cmd->start_time = jiffies;
2919 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
2920 cmnd->scsi_done = done;
2922 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2923 if (vport->phba->cfg_enable_bg) {
2924 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2925 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
2927 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2928 dif_op_str[scsi_get_prot_op(cmnd)]);
2929 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2930 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
2931 "%02x %02x %02x %02x %02x\n",
2932 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
2933 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
2934 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
2936 if (cmnd->cmnd[0] == READ_10)
2937 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2938 "9035 BLKGRD: READ @ sector %llu, "
2940 (unsigned long long)scsi_get_lba(cmnd),
2941 blk_rq_sectors(cmnd->request));
2942 else if (cmnd->cmnd[0] == WRITE_10)
2943 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2944 "9036 BLKGRD: WRITE @ sector %llu, "
2945 "count %u cmd=%p\n",
2946 (unsigned long long)scsi_get_lba(cmnd),
2947 blk_rq_sectors(cmnd->request),
2951 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
2953 if (vport->phba->cfg_enable_bg) {
2954 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2955 "9038 BLKGRD: rcvd unprotected cmd:"
2956 "%02x op:%02x str=%s\n",
2957 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2958 dif_op_str[scsi_get_prot_op(cmnd)]);
2959 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2960 "9039 BLKGRD: CDB: %02x %02x %02x "
2961 "%02x %02x %02x %02x %02x %02x %02x\n",
2962 cmnd->cmnd[0], cmnd->cmnd[1],
2963 cmnd->cmnd[2], cmnd->cmnd[3],
2964 cmnd->cmnd[4], cmnd->cmnd[5],
2965 cmnd->cmnd[6], cmnd->cmnd[7],
2966 cmnd->cmnd[8], cmnd->cmnd[9]);
2967 if (cmnd->cmnd[0] == READ_10)
2968 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2969 "9040 dbg: READ @ sector %llu, "
2971 (unsigned long long)scsi_get_lba(cmnd),
2972 blk_rq_sectors(cmnd->request));
2973 else if (cmnd->cmnd[0] == WRITE_10)
2974 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2975 "9041 dbg: WRITE @ sector %llu, "
2976 "count %u cmd=%p\n",
2977 (unsigned long long)scsi_get_lba(cmnd),
2978 blk_rq_sectors(cmnd->request), cmnd);
2980 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2981 "9042 dbg: parser not implemented\n");
2983 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2987 goto out_host_busy_free_buf;
2989 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
2991 atomic_inc(&ndlp->cmd_pending);
2992 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
2993 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
2995 atomic_dec(&ndlp->cmd_pending);
2996 goto out_host_busy_free_buf;
2998 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2999 spin_unlock(shost->host_lock);
3000 lpfc_sli_handle_fast_ring_event(phba,
3001 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3003 spin_lock(shost->host_lock);
3004 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3005 lpfc_poll_rearm_timer(phba);
3010 out_host_busy_free_buf:
3011 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3012 lpfc_release_scsi_buf(phba, lpfc_cmd);
3014 return SCSI_MLQUEUE_HOST_BUSY;
3022 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3023 * @cmnd: Pointer to scsi_cmnd data structure.
3025 * This routine aborts @cmnd pending in base driver.
3032 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3034 struct Scsi_Host *shost = cmnd->device->host;
3035 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3036 struct lpfc_hba *phba = vport->phba;
3037 struct lpfc_iocbq *iocb;
3038 struct lpfc_iocbq *abtsiocb;
3039 struct lpfc_scsi_buf *lpfc_cmd;
3042 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3044 fc_block_scsi_eh(cmnd);
3045 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3049 * If pCmd field of the corresponding lpfc_scsi_buf structure
3050 * points to a different SCSI command, then the driver has
3051 * already completed this command, but the midlayer did not
3052 * see the completion before the eh fired. Just return
3055 iocb = &lpfc_cmd->cur_iocbq;
3056 if (lpfc_cmd->pCmd != cmnd)
3059 BUG_ON(iocb->context1 != lpfc_cmd);
3061 abtsiocb = lpfc_sli_get_iocbq(phba);
3062 if (abtsiocb == NULL) {
3068 * The scsi command can not be in txq and it is in flight because the
3069 * pCmd is still pointig at the SCSI command we have to abort. There
3070 * is no need to search the txcmplq. Just send an abort to the FW.
3074 icmd = &abtsiocb->iocb;
3075 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3076 icmd->un.acxri.abortContextTag = cmd->ulpContext;
3077 if (phba->sli_rev == LPFC_SLI_REV4)
3078 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3080 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3083 icmd->ulpClass = cmd->ulpClass;
3085 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3086 abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3087 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3089 if (lpfc_is_link_up(phba))
3090 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3092 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3094 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3095 abtsiocb->vport = vport;
3096 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3098 lpfc_sli_release_iocbq(phba, abtsiocb);
3103 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3104 lpfc_sli_handle_fast_ring_event(phba,
3105 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3107 lpfc_cmd->waitq = &waitq;
3108 /* Wait for abort to complete */
3109 wait_event_timeout(waitq,
3110 (lpfc_cmd->pCmd != cmnd),
3111 (2*vport->cfg_devloss_tmo*HZ));
3113 spin_lock_irq(shost->host_lock);
3114 lpfc_cmd->waitq = NULL;
3115 spin_unlock_irq(shost->host_lock);
3117 if (lpfc_cmd->pCmd == cmnd) {
3119 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3120 "0748 abort handler timed out waiting "
3121 "for abort to complete: ret %#x, ID %d, "
3122 "LUN %d, snum %#lx\n",
3123 ret, cmnd->device->id, cmnd->device->lun,
3124 cmnd->serial_number);
3128 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3129 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3130 "LUN %d snum %#lx\n", ret, cmnd->device->id,
3131 cmnd->device->lun, cmnd->serial_number);
3136 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3138 switch (task_mgmt_cmd) {
3139 case FCP_ABORT_TASK_SET:
3140 return "ABORT_TASK_SET";
3141 case FCP_CLEAR_TASK_SET:
3142 return "FCP_CLEAR_TASK_SET";
3144 return "FCP_BUS_RESET";
3146 return "FCP_LUN_RESET";
3147 case FCP_TARGET_RESET:
3148 return "FCP_TARGET_RESET";
3150 return "FCP_CLEAR_ACA";
3151 case FCP_TERMINATE_TASK:
3152 return "FCP_TERMINATE_TASK";
3159 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3160 * @vport: The virtual port for which this call is being executed.
3161 * @rdata: Pointer to remote port local data
3162 * @tgt_id: Target ID of remote device.
3163 * @lun_id: Lun number for the TMF
3164 * @task_mgmt_cmd: type of TMF to send
3166 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3174 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3175 unsigned tgt_id, unsigned int lun_id,
3176 uint8_t task_mgmt_cmd)
3178 struct lpfc_hba *phba = vport->phba;
3179 struct lpfc_scsi_buf *lpfc_cmd;
3180 struct lpfc_iocbq *iocbq;
3181 struct lpfc_iocbq *iocbqrsp;
3185 if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
3188 lpfc_cmd = lpfc_get_scsi_buf(phba);
3189 if (lpfc_cmd == NULL)
3191 lpfc_cmd->timeout = 60;
3192 lpfc_cmd->rdata = rdata;
3194 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3197 lpfc_release_scsi_buf(phba, lpfc_cmd);
3201 iocbq = &lpfc_cmd->cur_iocbq;
3202 iocbqrsp = lpfc_sli_get_iocbq(phba);
3203 if (iocbqrsp == NULL) {
3204 lpfc_release_scsi_buf(phba, lpfc_cmd);
3208 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3209 "0702 Issue %s to TGT %d LUN %d "
3210 "rpi x%x nlp_flag x%x\n",
3211 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3212 rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
3214 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3215 iocbq, iocbqrsp, lpfc_cmd->timeout);
3216 if (status != IOCB_SUCCESS) {
3217 if (status == IOCB_TIMEDOUT) {
3218 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3219 ret = TIMEOUT_ERROR;
3222 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3223 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3224 "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
3225 lpfc_taskmgmt_name(task_mgmt_cmd),
3226 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3227 iocbqrsp->iocb.un.ulpWord[4]);
3231 lpfc_sli_release_iocbq(phba, iocbqrsp);
3233 if (ret != TIMEOUT_ERROR)
3234 lpfc_release_scsi_buf(phba, lpfc_cmd);
3240 * lpfc_chk_tgt_mapped -
3241 * @vport: The virtual port to check on
3242 * @cmnd: Pointer to scsi_cmnd data structure.
3244 * This routine delays until the scsi target (aka rport) for the
3245 * command exists (is present and logged in) or we declare it non-existent.
3252 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3254 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3255 struct lpfc_nodelist *pnode;
3256 unsigned long later;
3259 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3260 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3263 pnode = rdata->pnode;
3265 * If target is not in a MAPPED state, delay until
3266 * target is rediscovered or devloss timeout expires.
3268 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3269 while (time_after(later, jiffies)) {
3270 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3272 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3274 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3275 rdata = cmnd->device->hostdata;
3278 pnode = rdata->pnode;
3280 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3281 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3287 * lpfc_reset_flush_io_context -
3288 * @vport: The virtual port (scsi_host) for the flush context
3289 * @tgt_id: If aborting by Target contect - specifies the target id
3290 * @lun_id: If aborting by Lun context - specifies the lun id
3291 * @context: specifies the context level to flush at.
3293 * After a reset condition via TMF, we need to flush orphaned i/o
3294 * contexts from the adapter. This routine aborts any contexts
3295 * outstanding, then waits for their completions. The wait is
3296 * bounded by devloss_tmo though.
3303 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3304 uint64_t lun_id, lpfc_ctx_cmd context)
3306 struct lpfc_hba *phba = vport->phba;
3307 unsigned long later;
3310 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3312 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3313 tgt_id, lun_id, context);
3314 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3315 while (time_after(later, jiffies) && cnt) {
3316 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3317 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3320 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3321 "0724 I/O flush failure for context %s : cnt x%x\n",
3322 ((context == LPFC_CTX_LUN) ? "LUN" :
3323 ((context == LPFC_CTX_TGT) ? "TGT" :
3324 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3332 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3333 * @cmnd: Pointer to scsi_cmnd data structure.
3335 * This routine does a device reset by sending a LUN_RESET task management
3343 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3345 struct Scsi_Host *shost = cmnd->device->host;
3346 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3347 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3348 struct lpfc_nodelist *pnode;
3349 unsigned tgt_id = cmnd->device->id;
3350 unsigned int lun_id = cmnd->device->lun;
3351 struct lpfc_scsi_event_header scsi_event;
3355 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3356 "0798 Device Reset rport failure: rdata x%p\n", rdata);
3359 pnode = rdata->pnode;
3360 fc_block_scsi_eh(cmnd);
3362 status = lpfc_chk_tgt_mapped(vport, cmnd);
3363 if (status == FAILED) {
3364 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3365 "0721 Device Reset rport failure: rdata x%p\n", rdata);
3369 scsi_event.event_type = FC_REG_SCSI_EVENT;
3370 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3371 scsi_event.lun = lun_id;
3372 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3373 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3375 fc_host_post_vendor_event(shost, fc_get_event_number(),
3376 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3378 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3381 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3382 "0713 SCSI layer issued Device Reset (%d, %d) "
3383 "return x%x\n", tgt_id, lun_id, status);
3386 * We have to clean up i/o as : they may be orphaned by the TMF;
3387 * or if the TMF failed, they may be in an indeterminate state.
3389 * We will report success if all the i/o aborts successfully.
3391 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3397 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3398 * @cmnd: Pointer to scsi_cmnd data structure.
3400 * This routine does a target reset by sending a TARGET_RESET task management
3408 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3410 struct Scsi_Host *shost = cmnd->device->host;
3411 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3412 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3413 struct lpfc_nodelist *pnode;
3414 unsigned tgt_id = cmnd->device->id;
3415 unsigned int lun_id = cmnd->device->lun;
3416 struct lpfc_scsi_event_header scsi_event;
3420 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3421 "0799 Target Reset rport failure: rdata x%p\n", rdata);
3424 pnode = rdata->pnode;
3425 fc_block_scsi_eh(cmnd);
3427 status = lpfc_chk_tgt_mapped(vport, cmnd);
3428 if (status == FAILED) {
3429 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3430 "0722 Target Reset rport failure: rdata x%p\n", rdata);
3434 scsi_event.event_type = FC_REG_SCSI_EVENT;
3435 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3437 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3438 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3440 fc_host_post_vendor_event(shost, fc_get_event_number(),
3441 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3443 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3446 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3447 "0723 SCSI layer issued Target Reset (%d, %d) "
3448 "return x%x\n", tgt_id, lun_id, status);
3451 * We have to clean up i/o as : they may be orphaned by the TMF;
3452 * or if the TMF failed, they may be in an indeterminate state.
3454 * We will report success if all the i/o aborts successfully.
3456 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3462 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3463 * @cmnd: Pointer to scsi_cmnd data structure.
3465 * This routine does target reset to all targets on @cmnd->device->host.
3466 * This emulates Parallel SCSI Bus Reset Semantics.
3473 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3475 struct Scsi_Host *shost = cmnd->device->host;
3476 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3477 struct lpfc_nodelist *ndlp = NULL;
3478 struct lpfc_scsi_event_header scsi_event;
3480 int ret = SUCCESS, status, i;
3482 scsi_event.event_type = FC_REG_SCSI_EVENT;
3483 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3485 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3486 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3488 fc_host_post_vendor_event(shost, fc_get_event_number(),
3489 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3491 fc_block_scsi_eh(cmnd);
3494 * Since the driver manages a single bus device, reset all
3495 * targets known to the driver. Should any target reset
3496 * fail, this routine returns failure to the midlayer.
3498 for (i = 0; i < LPFC_MAX_TARGET; i++) {
3499 /* Search for mapped node by target ID */
3501 spin_lock_irq(shost->host_lock);
3502 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3503 if (!NLP_CHK_NODE_ACT(ndlp))
3505 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3506 ndlp->nlp_sid == i &&
3512 spin_unlock_irq(shost->host_lock);
3516 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3517 i, 0, FCP_TARGET_RESET);
3519 if (status != SUCCESS) {
3520 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3521 "0700 Bus Reset on target %d failed\n",
3527 * We have to clean up i/o as : they may be orphaned by the TMFs
3528 * above; or if any of the TMFs failed, they may be in an
3529 * indeterminate state.
3530 * We will report success if all the i/o aborts successfully.
3533 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3534 if (status != SUCCESS)
3537 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3538 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3543 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3544 * @sdev: Pointer to scsi_device.
3546 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
3547 * globally available list of scsi buffers. This routine also makes sure scsi
3548 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3549 * of scsi buffer exists for the lifetime of the driver.
3556 lpfc_slave_alloc(struct scsi_device *sdev)
3558 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3559 struct lpfc_hba *phba = vport->phba;
3560 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3562 uint32_t num_to_alloc = 0;
3563 int num_allocated = 0;
3565 if (!rport || fc_remote_port_chkready(rport))
3568 sdev->hostdata = rport->dd_data;
3571 * Populate the cmds_per_lun count scsi_bufs into this host's globally
3572 * available list of scsi buffers. Don't allocate more than the
3573 * HBA limit conveyed to the midlayer via the host structure. The
3574 * formula accounts for the lun_queue_depth + error handlers + 1
3575 * extra. This list of scsi bufs exists for the lifetime of the driver.
3577 total = phba->total_scsi_bufs;
3578 num_to_alloc = vport->cfg_lun_queue_depth + 2;
3580 /* Allow some exchanges to be available always to complete discovery */
3581 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3582 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3583 "0704 At limitation of %d preallocated "
3584 "command buffers\n", total);
3586 /* Allow some exchanges to be available always to complete discovery */
3587 } else if (total + num_to_alloc >
3588 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3589 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3590 "0705 Allocation request of %d "
3591 "command buffers will exceed max of %d. "
3592 "Reducing allocation request to %d.\n",
3593 num_to_alloc, phba->cfg_hba_queue_depth,
3594 (phba->cfg_hba_queue_depth - total));
3595 num_to_alloc = phba->cfg_hba_queue_depth - total;
3597 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3598 if (num_to_alloc != num_allocated) {
3599 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3600 "0708 Allocation request of %d "
3601 "command buffers did not succeed. "
3602 "Allocated %d buffers.\n",
3603 num_to_alloc, num_allocated);
3605 if (num_allocated > 0)
3606 phba->total_scsi_bufs += num_allocated;
3611 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3612 * @sdev: Pointer to scsi_device.
3614 * This routine configures following items
3615 * - Tag command queuing support for @sdev if supported.
3616 * - Dev loss time out value of fc_rport.
3617 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3623 lpfc_slave_configure(struct scsi_device *sdev)
3625 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3626 struct lpfc_hba *phba = vport->phba;
3627 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
3629 if (sdev->tagged_supported)
3630 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3632 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3635 * Initialize the fc transport attributes for the target
3636 * containing this scsi device. Also note that the driver's
3637 * target pointer is stored in the starget_data for the
3638 * driver's sysfs entry point functions.
3640 rport->dev_loss_tmo = vport->cfg_devloss_tmo;
3642 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3643 lpfc_sli_handle_fast_ring_event(phba,
3644 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3645 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3646 lpfc_poll_rearm_timer(phba);
3653 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3654 * @sdev: Pointer to scsi_device.
3656 * This routine sets @sdev hostatdata filed to null.
3659 lpfc_slave_destroy(struct scsi_device *sdev)
3661 sdev->hostdata = NULL;
3666 struct scsi_host_template lpfc_template = {
3667 .module = THIS_MODULE,
3668 .name = LPFC_DRIVER_NAME,
3670 .queuecommand = lpfc_queuecommand,
3671 .eh_abort_handler = lpfc_abort_handler,
3672 .eh_device_reset_handler = lpfc_device_reset_handler,
3673 .eh_target_reset_handler = lpfc_target_reset_handler,
3674 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3675 .slave_alloc = lpfc_slave_alloc,
3676 .slave_configure = lpfc_slave_configure,
3677 .slave_destroy = lpfc_slave_destroy,
3678 .scan_finished = lpfc_scan_finished,
3680 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3681 .cmd_per_lun = LPFC_CMD_PER_LUN,
3682 .use_clustering = ENABLE_CLUSTERING,
3683 .shost_attrs = lpfc_hba_attrs,
3684 .max_sectors = 0xFFFF,
3685 .vendor_id = LPFC_NL_VENDOR_ID,
3686 .change_queue_depth = lpfc_change_queue_depth,
3689 struct scsi_host_template lpfc_vport_template = {
3690 .module = THIS_MODULE,
3691 .name = LPFC_DRIVER_NAME,
3693 .queuecommand = lpfc_queuecommand,
3694 .eh_abort_handler = lpfc_abort_handler,
3695 .eh_device_reset_handler = lpfc_device_reset_handler,
3696 .eh_target_reset_handler = lpfc_target_reset_handler,
3697 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3698 .slave_alloc = lpfc_slave_alloc,
3699 .slave_configure = lpfc_slave_configure,
3700 .slave_destroy = lpfc_slave_destroy,
3701 .scan_finished = lpfc_scan_finished,
3703 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3704 .cmd_per_lun = LPFC_CMD_PER_LUN,
3705 .use_clustering = ENABLE_CLUSTERING,
3706 .shost_attrs = lpfc_vport_attrs,
3707 .max_sectors = 0xFFFF,
3708 .change_queue_depth = lpfc_change_queue_depth,