1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2011 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 ||
174 (phba->bucket_type == LPFC_NO_BUCKET)) {
175 spin_unlock_irqrestore(shost->host_lock, flags);
179 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
180 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
182 /* check array subscript bounds */
185 else if (i >= LPFC_MAX_BUCKET_COUNT)
186 i = LPFC_MAX_BUCKET_COUNT - 1;
188 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
189 if (latency <= (phba->bucket_base +
190 ((1<<i)*phba->bucket_step)))
194 pnode->lat_data[i].cmd_count++;
195 spin_unlock_irqrestore(shost->host_lock, flags);
199 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
200 * @phba: Pointer to HBA context object.
201 * @vport: Pointer to vport object.
202 * @ndlp: Pointer to FC node associated with the target.
203 * @lun: Lun number of the scsi device.
204 * @old_val: Old value of the queue depth.
205 * @new_val: New value of the queue depth.
207 * This function sends an event to the mgmt application indicating
208 * there is a change in the scsi device queue depth.
211 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
212 struct lpfc_vport *vport,
213 struct lpfc_nodelist *ndlp,
218 struct lpfc_fast_path_event *fast_path_evt;
221 fast_path_evt = lpfc_alloc_fast_evt(phba);
225 fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
227 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
228 LPFC_EVENT_VARQUEDEPTH;
230 /* Report all luns with change in queue depth */
231 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
232 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
233 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
234 &ndlp->nlp_portname, sizeof(struct lpfc_name));
235 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
236 &ndlp->nlp_nodename, sizeof(struct lpfc_name));
239 fast_path_evt->un.queue_depth_evt.oldval = old_val;
240 fast_path_evt->un.queue_depth_evt.newval = new_val;
241 fast_path_evt->vport = vport;
243 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
244 spin_lock_irqsave(&phba->hbalock, flags);
245 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
246 spin_unlock_irqrestore(&phba->hbalock, flags);
247 lpfc_worker_wake_up(phba);
253 * lpfc_change_queue_depth - Alter scsi device queue depth
254 * @sdev: Pointer the scsi device on which to change the queue depth.
255 * @qdepth: New queue depth to set the sdev to.
256 * @reason: The reason for the queue depth change.
258 * This function is called by the midlayer and the LLD to alter the queue
259 * depth for a scsi device. This function sets the queue depth to the new
260 * value and sends an event out to log the queue depth change.
263 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
265 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
266 struct lpfc_hba *phba = vport->phba;
267 struct lpfc_rport_data *rdata;
268 unsigned long new_queue_depth, old_queue_depth;
270 old_queue_depth = sdev->queue_depth;
271 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
272 new_queue_depth = sdev->queue_depth;
273 rdata = sdev->hostdata;
275 lpfc_send_sdev_queuedepth_change_event(phba, vport,
276 rdata->pnode, sdev->lun,
279 return sdev->queue_depth;
283 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
284 * @phba: The Hba for which this call is being executed.
286 * This routine is called when there is resource error in driver or firmware.
287 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
288 * posts at most 1 event each second. This routine wakes up worker thread of
289 * @phba to process WORKER_RAM_DOWN_EVENT event.
291 * This routine should be called with no lock held.
294 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
299 spin_lock_irqsave(&phba->hbalock, flags);
300 atomic_inc(&phba->num_rsrc_err);
301 phba->last_rsrc_error_time = jiffies;
303 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
304 spin_unlock_irqrestore(&phba->hbalock, flags);
308 phba->last_ramp_down_time = jiffies;
310 spin_unlock_irqrestore(&phba->hbalock, flags);
312 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
313 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
315 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
316 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
319 lpfc_worker_wake_up(phba);
324 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
325 * @phba: The Hba for which this call is being executed.
327 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
328 * post at most 1 event every 5 minute after last_ramp_up_time or
329 * last_rsrc_error_time. This routine wakes up worker thread of @phba
330 * to process WORKER_RAM_DOWN_EVENT event.
332 * This routine should be called with no lock held.
335 lpfc_rampup_queue_depth(struct lpfc_vport *vport,
336 uint32_t queue_depth)
339 struct lpfc_hba *phba = vport->phba;
341 atomic_inc(&phba->num_cmd_success);
343 if (vport->cfg_lun_queue_depth <= queue_depth)
345 spin_lock_irqsave(&phba->hbalock, flags);
346 if (time_before(jiffies,
347 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
349 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
350 spin_unlock_irqrestore(&phba->hbalock, flags);
353 phba->last_ramp_up_time = jiffies;
354 spin_unlock_irqrestore(&phba->hbalock, flags);
356 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
357 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
359 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
360 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
363 lpfc_worker_wake_up(phba);
368 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
369 * @phba: The Hba for which this call is being executed.
371 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
372 * thread.This routine reduces queue depth for all scsi device on each vport
373 * associated with @phba.
376 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
378 struct lpfc_vport **vports;
379 struct Scsi_Host *shost;
380 struct scsi_device *sdev;
381 unsigned long new_queue_depth;
382 unsigned long num_rsrc_err, num_cmd_success;
385 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
386 num_cmd_success = atomic_read(&phba->num_cmd_success);
388 vports = lpfc_create_vport_work_array(phba);
390 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
391 shost = lpfc_shost_from_vport(vports[i]);
392 shost_for_each_device(sdev, shost) {
394 sdev->queue_depth * num_rsrc_err /
395 (num_rsrc_err + num_cmd_success);
396 if (!new_queue_depth)
397 new_queue_depth = sdev->queue_depth - 1;
399 new_queue_depth = sdev->queue_depth -
401 lpfc_change_queue_depth(sdev, new_queue_depth,
402 SCSI_QDEPTH_DEFAULT);
405 lpfc_destroy_vport_work_array(phba, vports);
406 atomic_set(&phba->num_rsrc_err, 0);
407 atomic_set(&phba->num_cmd_success, 0);
411 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
412 * @phba: The Hba for which this call is being executed.
414 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker
415 * thread.This routine increases queue depth for all scsi device on each vport
416 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
417 * num_cmd_success to zero.
420 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
422 struct lpfc_vport **vports;
423 struct Scsi_Host *shost;
424 struct scsi_device *sdev;
427 vports = lpfc_create_vport_work_array(phba);
429 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
430 shost = lpfc_shost_from_vport(vports[i]);
431 shost_for_each_device(sdev, shost) {
432 if (vports[i]->cfg_lun_queue_depth <=
435 lpfc_change_queue_depth(sdev,
437 SCSI_QDEPTH_RAMP_UP);
440 lpfc_destroy_vport_work_array(phba, vports);
441 atomic_set(&phba->num_rsrc_err, 0);
442 atomic_set(&phba->num_cmd_success, 0);
446 * lpfc_scsi_dev_block - set all scsi hosts to block state
447 * @phba: Pointer to HBA context object.
449 * This function walks vport list and set each SCSI host to block state
450 * by invoking fc_remote_port_delete() routine. This function is invoked
451 * with EEH when device's PCI slot has been permanently disabled.
454 lpfc_scsi_dev_block(struct lpfc_hba *phba)
456 struct lpfc_vport **vports;
457 struct Scsi_Host *shost;
458 struct scsi_device *sdev;
459 struct fc_rport *rport;
462 vports = lpfc_create_vport_work_array(phba);
464 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
465 shost = lpfc_shost_from_vport(vports[i]);
466 shost_for_each_device(sdev, shost) {
467 rport = starget_to_rport(scsi_target(sdev));
468 fc_remote_port_delete(rport);
471 lpfc_destroy_vport_work_array(phba, vports);
475 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
476 * @vport: The virtual port for which this call being executed.
477 * @num_to_allocate: The requested number of buffers to allocate.
479 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
480 * the scsi buffer contains all the necessary information needed to initiate
481 * a SCSI I/O. The non-DMAable buffer region contains information to build
482 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
483 * and the initial BPL. In addition to allocating memory, the FCP CMND and
484 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
487 * int - number of scsi buffers that were allocated.
488 * 0 = failure, less than num_to_alloc is a partial failure.
491 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
493 struct lpfc_hba *phba = vport->phba;
494 struct lpfc_scsi_buf *psb;
495 struct ulp_bde64 *bpl;
497 dma_addr_t pdma_phys_fcp_cmd;
498 dma_addr_t pdma_phys_fcp_rsp;
499 dma_addr_t pdma_phys_bpl;
503 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
504 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
509 * Get memory from the pci pool to map the virt space to pci
510 * bus space for an I/O. The DMA buffer includes space for the
511 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
512 * necessary to support the sg_tablesize.
514 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
515 GFP_KERNEL, &psb->dma_handle);
521 /* Initialize virtual ptrs to dma_buf region. */
522 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
524 /* Allocate iotag for psb->cur_iocbq. */
525 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
527 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
528 psb->data, psb->dma_handle);
532 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
534 psb->fcp_cmnd = psb->data;
535 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
536 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
537 sizeof(struct fcp_rsp);
539 /* Initialize local short-hand pointers. */
541 pdma_phys_fcp_cmd = psb->dma_handle;
542 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
543 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
544 sizeof(struct fcp_rsp);
547 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
548 * are sg list bdes. Initialize the first two and leave the
549 * rest for queuecommand.
551 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
552 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
553 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
554 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
555 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
557 /* Setup the physical region for the FCP RSP */
558 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
559 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
560 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
561 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
562 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
565 * Since the IOCB for the FCP I/O is built into this
566 * lpfc_scsi_buf, initialize it with all known data now.
568 iocb = &psb->cur_iocbq.iocb;
569 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
570 if ((phba->sli_rev == 3) &&
571 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
572 /* fill in immediate fcp command BDE */
573 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
574 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
575 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
577 iocb->un.fcpi64.bdl.addrHigh = 0;
578 iocb->ulpBdeCount = 0;
580 /* fill in response BDE */
581 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
583 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
584 sizeof(struct fcp_rsp);
585 iocb->unsli3.fcp_ext.rbde.addrLow =
586 putPaddrLow(pdma_phys_fcp_rsp);
587 iocb->unsli3.fcp_ext.rbde.addrHigh =
588 putPaddrHigh(pdma_phys_fcp_rsp);
590 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
591 iocb->un.fcpi64.bdl.bdeSize =
592 (2 * sizeof(struct ulp_bde64));
593 iocb->un.fcpi64.bdl.addrLow =
594 putPaddrLow(pdma_phys_bpl);
595 iocb->un.fcpi64.bdl.addrHigh =
596 putPaddrHigh(pdma_phys_bpl);
597 iocb->ulpBdeCount = 1;
600 iocb->ulpClass = CLASS3;
601 psb->status = IOSTAT_SUCCESS;
602 /* Put it back into the SCSI buffer list */
603 psb->cur_iocbq.context1 = psb;
604 lpfc_release_scsi_buf_s3(phba, psb);
612 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
613 * @vport: pointer to lpfc vport data structure.
615 * This routine is invoked by the vport cleanup for deletions and the cleanup
616 * for an ndlp on removal.
619 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
621 struct lpfc_hba *phba = vport->phba;
622 struct lpfc_scsi_buf *psb, *next_psb;
623 unsigned long iflag = 0;
625 spin_lock_irqsave(&phba->hbalock, iflag);
626 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
627 list_for_each_entry_safe(psb, next_psb,
628 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
629 if (psb->rdata && psb->rdata->pnode
630 && psb->rdata->pnode->vport == vport)
633 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
634 spin_unlock_irqrestore(&phba->hbalock, iflag);
638 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
639 * @phba: pointer to lpfc hba data structure.
640 * @axri: pointer to the fcp xri abort wcqe structure.
642 * This routine is invoked by the worker thread to process a SLI4 fast-path
646 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
647 struct sli4_wcqe_xri_aborted *axri)
649 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
650 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
651 struct lpfc_scsi_buf *psb, *next_psb;
652 unsigned long iflag = 0;
653 struct lpfc_iocbq *iocbq;
655 struct lpfc_nodelist *ndlp;
657 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
659 spin_lock_irqsave(&phba->hbalock, iflag);
660 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
661 list_for_each_entry_safe(psb, next_psb,
662 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
663 if (psb->cur_iocbq.sli4_xritag == xri) {
664 list_del(&psb->list);
666 psb->status = IOSTAT_SUCCESS;
668 &phba->sli4_hba.abts_scsi_buf_list_lock);
669 if (psb->rdata && psb->rdata->pnode)
670 ndlp = psb->rdata->pnode;
674 rrq_empty = list_empty(&phba->active_rrq_list);
675 spin_unlock_irqrestore(&phba->hbalock, iflag);
677 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1);
678 lpfc_release_scsi_buf_s4(phba, psb);
680 lpfc_worker_wake_up(phba);
684 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
685 for (i = 1; i <= phba->sli.last_iotag; i++) {
686 iocbq = phba->sli.iocbq_lookup[i];
688 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
689 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
691 if (iocbq->sli4_xritag != xri)
693 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
695 spin_unlock_irqrestore(&phba->hbalock, iflag);
697 lpfc_worker_wake_up(phba);
701 spin_unlock_irqrestore(&phba->hbalock, iflag);
705 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
706 * @phba: pointer to lpfc hba data structure.
708 * This routine walks the list of scsi buffers that have been allocated and
709 * repost them to the HBA by using SGL block post. This is needed after a
710 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
711 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
712 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
714 * Returns: 0 = success, non-zero failure.
717 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
719 struct lpfc_scsi_buf *psb;
720 int index, status, bcnt = 0, rcnt = 0, rc = 0;
723 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
724 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
726 /* Remove from SCSI buffer list */
727 list_del(&psb->list);
728 /* Add it to a local SCSI buffer list */
729 list_add_tail(&psb->list, &sblist);
730 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
735 /* A hole present in the XRI array, need to skip */
738 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
739 /* End of XRI array for SCSI buffer, complete */
742 /* Continue until collect up to a nembed page worth of sgls */
745 /* Now, post the SCSI buffer list sgls as a block */
746 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
747 /* Reset SCSI buffer count for next round of posting */
749 while (!list_empty(&sblist)) {
750 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
753 /* Put this back on the abort scsi list */
758 psb->status = IOSTAT_SUCCESS;
760 /* Put it back into the SCSI buffer list */
761 lpfc_release_scsi_buf_s4(phba, psb);
768 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
769 * @vport: The virtual port for which this call being executed.
770 * @num_to_allocate: The requested number of buffers to allocate.
772 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
773 * the scsi buffer contains all the necessary information needed to initiate
777 * int - number of scsi buffers that were allocated.
778 * 0 = failure, less than num_to_alloc is a partial failure.
781 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
783 struct lpfc_hba *phba = vport->phba;
784 struct lpfc_scsi_buf *psb;
785 struct sli4_sge *sgl;
787 dma_addr_t pdma_phys_fcp_cmd;
788 dma_addr_t pdma_phys_fcp_rsp;
789 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
790 uint16_t iotag, last_xritag = NO_XRI;
791 int status = 0, index;
793 int non_sequential_xri = 0;
796 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
797 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
802 * Get memory from the pci pool to map the virt space to pci bus
803 * space for an I/O. The DMA buffer includes space for the
804 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
805 * necessary to support the sg_tablesize.
807 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
808 GFP_KERNEL, &psb->dma_handle);
814 /* Initialize virtual ptrs to dma_buf region. */
815 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
817 /* Allocate iotag for psb->cur_iocbq. */
818 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
820 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
821 psb->data, psb->dma_handle);
826 psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
827 if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
828 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
829 psb->data, psb->dma_handle);
833 if (last_xritag != NO_XRI
834 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
835 non_sequential_xri = 1;
837 list_add_tail(&psb->list, &sblist);
838 last_xritag = psb->cur_iocbq.sli4_xritag;
840 index = phba->sli4_hba.scsi_xri_cnt++;
841 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
843 psb->fcp_bpl = psb->data;
844 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
845 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
846 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
847 sizeof(struct fcp_cmnd));
849 /* Initialize local short-hand pointers. */
850 sgl = (struct sli4_sge *)psb->fcp_bpl;
851 pdma_phys_bpl = psb->dma_handle;
853 (psb->dma_handle + phba->cfg_sg_dma_buf_size)
854 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
855 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
858 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
859 * are sg list bdes. Initialize the first two and leave the
860 * rest for queuecommand.
862 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
863 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
864 sgl->word2 = le32_to_cpu(sgl->word2);
865 bf_set(lpfc_sli4_sge_last, sgl, 0);
866 sgl->word2 = cpu_to_le32(sgl->word2);
867 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
870 /* Setup the physical region for the FCP RSP */
871 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
872 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
873 sgl->word2 = le32_to_cpu(sgl->word2);
874 bf_set(lpfc_sli4_sge_last, sgl, 1);
875 sgl->word2 = cpu_to_le32(sgl->word2);
876 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
879 * Since the IOCB for the FCP I/O is built into this
880 * lpfc_scsi_buf, initialize it with all known data now.
882 iocb = &psb->cur_iocbq.iocb;
883 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
884 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
885 /* setting the BLP size to 2 * sizeof BDE may not be correct.
886 * We are setting the bpl to point to out sgl. An sgl's
887 * entries are 16 bytes, a bpl entries are 12 bytes.
889 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
890 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
891 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
892 iocb->ulpBdeCount = 1;
894 iocb->ulpClass = CLASS3;
895 psb->cur_iocbq.context1 = psb;
896 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
897 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
900 psb->dma_phys_bpl = pdma_phys_bpl;
901 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
902 if (non_sequential_xri) {
903 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
905 psb->cur_iocbq.sli4_xritag);
907 /* Put this back on the abort scsi list */
911 psb->status = IOSTAT_SUCCESS;
913 /* Put it back into the SCSI buffer list */
914 lpfc_release_scsi_buf_s4(phba, psb);
919 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
920 /* Reset SCSI buffer count for next round of posting */
921 while (!list_empty(&sblist)) {
922 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
925 /* Put this back on the abort scsi list */
929 psb->status = IOSTAT_SUCCESS;
931 /* Put it back into the SCSI buffer list */
932 lpfc_release_scsi_buf_s4(phba, psb);
936 return bcnt + non_sequential_xri;
940 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
941 * @vport: The virtual port for which this call being executed.
942 * @num_to_allocate: The requested number of buffers to allocate.
944 * This routine wraps the actual SCSI buffer allocator function pointer from
945 * the lpfc_hba struct.
948 * int - number of scsi buffers that were allocated.
949 * 0 = failure, less than num_to_alloc is a partial failure.
952 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
954 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
958 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
959 * @phba: The HBA for which this call is being executed.
961 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
962 * and returns to caller.
966 * Pointer to lpfc_scsi_buf - Success
968 static struct lpfc_scsi_buf*
969 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
971 struct lpfc_scsi_buf * lpfc_cmd = NULL;
972 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
973 unsigned long iflag = 0;
975 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
976 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
978 lpfc_cmd->seg_cnt = 0;
979 lpfc_cmd->nonsg_phys = 0;
980 lpfc_cmd->prot_seg_cnt = 0;
982 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
986 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
987 * @phba: The HBA for which this call is being executed.
989 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
990 * and returns to caller.
994 * Pointer to lpfc_scsi_buf - Success
996 static struct lpfc_scsi_buf*
997 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
999 struct lpfc_scsi_buf *lpfc_cmd ;
1000 unsigned long iflag = 0;
1003 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1004 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,
1006 if (lpfc_test_rrq_active(phba, ndlp,
1007 lpfc_cmd->cur_iocbq.sli4_xritag))
1009 list_del(&lpfc_cmd->list);
1011 lpfc_cmd->seg_cnt = 0;
1012 lpfc_cmd->nonsg_phys = 0;
1013 lpfc_cmd->prot_seg_cnt = 0;
1016 spin_unlock_irqrestore(&phba->scsi_buf_list_lock,
1024 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1025 * @phba: The HBA for which this call is being executed.
1027 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1028 * and returns to caller.
1032 * Pointer to lpfc_scsi_buf - Success
1034 static struct lpfc_scsi_buf*
1035 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1037 return phba->lpfc_get_scsi_buf(phba, ndlp);
1041 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1042 * @phba: The Hba for which this call is being executed.
1043 * @psb: The scsi buffer which is being released.
1045 * This routine releases @psb scsi buffer by adding it to tail of @phba
1046 * lpfc_scsi_buf_list list.
1049 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1051 unsigned long iflag = 0;
1053 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1055 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1056 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1060 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1061 * @phba: The Hba for which this call is being executed.
1062 * @psb: The scsi buffer which is being released.
1064 * This routine releases @psb scsi buffer by adding it to tail of @phba
1065 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1066 * and cannot be reused for at least RA_TOV amount of time if it was
1070 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1072 unsigned long iflag = 0;
1074 if (psb->exch_busy) {
1075 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1078 list_add_tail(&psb->list,
1079 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1080 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1084 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1086 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1087 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1092 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1093 * @phba: The Hba for which this call is being executed.
1094 * @psb: The scsi buffer which is being released.
1096 * This routine releases @psb scsi buffer by adding it to tail of @phba
1097 * lpfc_scsi_buf_list list.
1100 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1103 phba->lpfc_release_scsi_buf(phba, psb);
1107 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1108 * @phba: The Hba for which this call is being executed.
1109 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1111 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1112 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1113 * through sg elements and format the bdea. This routine also initializes all
1114 * IOCB fields which are dependent on scsi command request buffer.
1121 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1123 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1124 struct scatterlist *sgel = NULL;
1125 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1126 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1127 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1128 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1129 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1130 dma_addr_t physaddr;
1131 uint32_t num_bde = 0;
1132 int nseg, datadir = scsi_cmnd->sc_data_direction;
1135 * There are three possibilities here - use scatter-gather segment, use
1136 * the single mapping, or neither. Start the lpfc command prep by
1137 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1141 if (scsi_sg_count(scsi_cmnd)) {
1143 * The driver stores the segment count returned from pci_map_sg
1144 * because this a count of dma-mappings used to map the use_sg
1145 * pages. They are not guaranteed to be the same for those
1146 * architectures that implement an IOMMU.
1149 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1150 scsi_sg_count(scsi_cmnd), datadir);
1151 if (unlikely(!nseg))
1154 lpfc_cmd->seg_cnt = nseg;
1155 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1156 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1157 "9064 BLKGRD: %s: Too many sg segments from "
1158 "dma_map_sg. Config %d, seg_cnt %d\n",
1159 __func__, phba->cfg_sg_seg_cnt,
1161 scsi_dma_unmap(scsi_cmnd);
1166 * The driver established a maximum scatter-gather segment count
1167 * during probe that limits the number of sg elements in any
1168 * single scsi command. Just run through the seg_cnt and format
1170 * When using SLI-3 the driver will try to fit all the BDEs into
1171 * the IOCB. If it can't then the BDEs get added to a BPL as it
1172 * does for SLI-2 mode.
1174 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1175 physaddr = sg_dma_address(sgel);
1176 if (phba->sli_rev == 3 &&
1177 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1178 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1179 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1180 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1181 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1182 data_bde->addrLow = putPaddrLow(physaddr);
1183 data_bde->addrHigh = putPaddrHigh(physaddr);
1186 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1187 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1188 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1190 le32_to_cpu(putPaddrLow(physaddr));
1192 le32_to_cpu(putPaddrHigh(physaddr));
1199 * Finish initializing those IOCB fields that are dependent on the
1200 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1201 * explicitly reinitialized and for SLI-3 the extended bde count is
1202 * explicitly reinitialized since all iocb memory resources are reused.
1204 if (phba->sli_rev == 3 &&
1205 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1206 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1207 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1209 * The extended IOCB format can only fit 3 BDE or a BPL.
1210 * This I/O has more than 3 BDE so the 1st data bde will
1211 * be a BPL that is filled in here.
1213 physaddr = lpfc_cmd->dma_handle;
1214 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1215 data_bde->tus.f.bdeSize = (num_bde *
1216 sizeof(struct ulp_bde64));
1217 physaddr += (sizeof(struct fcp_cmnd) +
1218 sizeof(struct fcp_rsp) +
1219 (2 * sizeof(struct ulp_bde64)));
1220 data_bde->addrHigh = putPaddrHigh(physaddr);
1221 data_bde->addrLow = putPaddrLow(physaddr);
1222 /* ebde count includes the response bde and data bpl */
1223 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1225 /* ebde count includes the response bde and data bdes */
1226 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1229 iocb_cmd->un.fcpi64.bdl.bdeSize =
1230 ((num_bde + 2) * sizeof(struct ulp_bde64));
1231 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1233 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1236 * Due to difference in data length between DIF/non-DIF paths,
1237 * we need to set word 4 of IOCB here
1239 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1244 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1245 * @sc: The SCSI command to examine
1246 * @txopt: (out) BlockGuard operation for transmitted data
1247 * @rxopt: (out) BlockGuard operation for received data
1249 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1253 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1254 uint8_t *txop, uint8_t *rxop)
1256 uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1259 if (guard_type == SHOST_DIX_GUARD_IP) {
1260 switch (scsi_get_prot_op(sc)) {
1261 case SCSI_PROT_READ_INSERT:
1262 case SCSI_PROT_WRITE_STRIP:
1263 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1264 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1267 case SCSI_PROT_READ_STRIP:
1268 case SCSI_PROT_WRITE_INSERT:
1269 *txop = BG_OP_IN_NODIF_OUT_CRC;
1270 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1273 case SCSI_PROT_READ_PASS:
1274 case SCSI_PROT_WRITE_PASS:
1275 *txop = BG_OP_IN_CSUM_OUT_CRC;
1276 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1279 case SCSI_PROT_NORMAL:
1281 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1282 "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1283 scsi_get_prot_op(sc), guard_type);
1288 } else if (guard_type == SHOST_DIX_GUARD_CRC) {
1289 switch (scsi_get_prot_op(sc)) {
1290 case SCSI_PROT_READ_STRIP:
1291 case SCSI_PROT_WRITE_INSERT:
1292 *txop = BG_OP_IN_NODIF_OUT_CRC;
1293 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1296 case SCSI_PROT_READ_PASS:
1297 case SCSI_PROT_WRITE_PASS:
1298 *txop = BG_OP_IN_CRC_OUT_CRC;
1299 *rxop = BG_OP_IN_CRC_OUT_CRC;
1302 case SCSI_PROT_READ_INSERT:
1303 case SCSI_PROT_WRITE_STRIP:
1304 case SCSI_PROT_NORMAL:
1306 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1307 "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1308 scsi_get_prot_op(sc), guard_type);
1313 /* unsupported format */
1320 struct scsi_dif_tuple {
1321 __be16 guard_tag; /* Checksum */
1322 __be16 app_tag; /* Opaque storage */
1323 __be32 ref_tag; /* Target LBA or indirect LBA */
1326 static inline unsigned
1327 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1329 return sc->device->sector_size;
1333 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
1334 * @sc: in: SCSI command
1335 * @apptagmask: out: app tag mask
1336 * @apptagval: out: app tag value
1337 * @reftag: out: ref tag (reference tag)
1340 * Extract DIF parameters from the command if possible. Otherwise,
1341 * use default parameters.
1345 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
1346 uint16_t *apptagval, uint32_t *reftag)
1348 struct scsi_dif_tuple *spt;
1349 unsigned char op = scsi_get_prot_op(sc);
1350 unsigned int protcnt = scsi_prot_sg_count(sc);
1353 if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1354 op == SCSI_PROT_WRITE_PASS)) {
1357 spt = page_address(sg_page(scsi_prot_sglist(sc))) +
1358 scsi_prot_sglist(sc)[0].offset;
1361 *reftag = cpu_to_be32(spt->ref_tag);
1364 /* SBC defines ref tag to be lower 32bits of LBA */
1365 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
1372 * This function sets up buffer list for protection groups of
1373 * type LPFC_PG_TYPE_NO_DIF
1375 * This is usually used when the HBA is instructed to generate
1376 * DIFs and insert them into data stream (or strip DIF from
1377 * incoming data stream)
1379 * The buffer list consists of just one protection group described
1381 * +-------------------------+
1382 * start of prot group --> | PDE_5 |
1383 * +-------------------------+
1385 * +-------------------------+
1387 * +-------------------------+
1388 * |more Data BDE's ... (opt)|
1389 * +-------------------------+
1391 * @sc: pointer to scsi command we're working on
1392 * @bpl: pointer to buffer list for protection groups
1393 * @datacnt: number of segments of data that have been dma mapped
1395 * Note: Data s/g buffers have been dma mapped
1398 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1399 struct ulp_bde64 *bpl, int datasegcnt)
1401 struct scatterlist *sgde = NULL; /* s/g data entry */
1402 struct lpfc_pde5 *pde5 = NULL;
1403 struct lpfc_pde6 *pde6 = NULL;
1404 dma_addr_t physaddr;
1405 int i = 0, num_bde = 0, status;
1406 int datadir = sc->sc_data_direction;
1409 uint16_t apptagmask, apptagval;
1412 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1416 /* extract some info from the scsi command for pde*/
1417 blksize = lpfc_cmd_blksize(sc);
1418 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1420 /* setup PDE5 with what we have */
1421 pde5 = (struct lpfc_pde5 *) bpl;
1422 memset(pde5, 0, sizeof(struct lpfc_pde5));
1423 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1424 pde5->reftag = reftag;
1426 /* Endianness conversion if necessary for PDE5 */
1427 pde5->word0 = cpu_to_le32(pde5->word0);
1428 pde5->reftag = cpu_to_le32(pde5->reftag);
1430 /* advance bpl and increment bde count */
1433 pde6 = (struct lpfc_pde6 *) bpl;
1435 /* setup PDE6 with the rest of the info */
1436 memset(pde6, 0, sizeof(struct lpfc_pde6));
1437 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1438 bf_set(pde6_optx, pde6, txop);
1439 bf_set(pde6_oprx, pde6, rxop);
1440 if (datadir == DMA_FROM_DEVICE) {
1441 bf_set(pde6_ce, pde6, 1);
1442 bf_set(pde6_re, pde6, 1);
1443 bf_set(pde6_ae, pde6, 1);
1445 bf_set(pde6_ai, pde6, 1);
1446 bf_set(pde6_apptagval, pde6, apptagval);
1448 /* Endianness conversion if necessary for PDE6 */
1449 pde6->word0 = cpu_to_le32(pde6->word0);
1450 pde6->word1 = cpu_to_le32(pde6->word1);
1451 pde6->word2 = cpu_to_le32(pde6->word2);
1453 /* advance bpl and increment bde count */
1457 /* assumption: caller has already run dma_map_sg on command data */
1458 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1459 physaddr = sg_dma_address(sgde);
1460 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1461 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1462 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1463 if (datadir == DMA_TO_DEVICE)
1464 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1466 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1467 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1477 * This function sets up buffer list for protection groups of
1478 * type LPFC_PG_TYPE_DIF_BUF
1480 * This is usually used when DIFs are in their own buffers,
1481 * separate from the data. The HBA can then by instructed
1482 * to place the DIFs in the outgoing stream. For read operations,
1483 * The HBA could extract the DIFs and place it in DIF buffers.
1485 * The buffer list for this type consists of one or more of the
1486 * protection groups described below:
1487 * +-------------------------+
1488 * start of first prot group --> | PDE_5 |
1489 * +-------------------------+
1491 * +-------------------------+
1492 * | PDE_7 (Prot BDE) |
1493 * +-------------------------+
1495 * +-------------------------+
1496 * |more Data BDE's ... (opt)|
1497 * +-------------------------+
1498 * start of new prot group --> | PDE_5 |
1499 * +-------------------------+
1501 * +-------------------------+
1503 * @sc: pointer to scsi command we're working on
1504 * @bpl: pointer to buffer list for protection groups
1505 * @datacnt: number of segments of data that have been dma mapped
1506 * @protcnt: number of segment of protection data that have been dma mapped
1508 * Note: It is assumed that both data and protection s/g buffers have been
1512 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1513 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1515 struct scatterlist *sgde = NULL; /* s/g data entry */
1516 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1517 struct lpfc_pde5 *pde5 = NULL;
1518 struct lpfc_pde6 *pde6 = NULL;
1519 struct lpfc_pde7 *pde7 = NULL;
1520 dma_addr_t dataphysaddr, protphysaddr;
1521 unsigned short curr_data = 0, curr_prot = 0;
1522 unsigned int split_offset;
1523 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1524 unsigned int protgrp_blks, protgrp_bytes;
1525 unsigned int remainder, subtotal;
1527 int datadir = sc->sc_data_direction;
1528 unsigned char pgdone = 0, alldone = 0;
1531 uint16_t apptagmask, apptagval;
1535 sgpe = scsi_prot_sglist(sc);
1536 sgde = scsi_sglist(sc);
1538 if (!sgpe || !sgde) {
1539 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1540 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1545 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1549 /* extract some info from the scsi command */
1550 blksize = lpfc_cmd_blksize(sc);
1551 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1555 /* setup PDE5 with what we have */
1556 pde5 = (struct lpfc_pde5 *) bpl;
1557 memset(pde5, 0, sizeof(struct lpfc_pde5));
1558 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1559 pde5->reftag = reftag;
1561 /* Endianness conversion if necessary for PDE5 */
1562 pde5->word0 = cpu_to_le32(pde5->word0);
1563 pde5->reftag = cpu_to_le32(pde5->reftag);
1565 /* advance bpl and increment bde count */
1568 pde6 = (struct lpfc_pde6 *) bpl;
1570 /* setup PDE6 with the rest of the info */
1571 memset(pde6, 0, sizeof(struct lpfc_pde6));
1572 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1573 bf_set(pde6_optx, pde6, txop);
1574 bf_set(pde6_oprx, pde6, rxop);
1575 bf_set(pde6_ce, pde6, 1);
1576 bf_set(pde6_re, pde6, 1);
1577 bf_set(pde6_ae, pde6, 1);
1578 bf_set(pde6_ai, pde6, 1);
1579 bf_set(pde6_apptagval, pde6, apptagval);
1581 /* Endianness conversion if necessary for PDE6 */
1582 pde6->word0 = cpu_to_le32(pde6->word0);
1583 pde6->word1 = cpu_to_le32(pde6->word1);
1584 pde6->word2 = cpu_to_le32(pde6->word2);
1586 /* advance bpl and increment bde count */
1590 /* setup the first BDE that points to protection buffer */
1591 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1592 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1594 /* must be integer multiple of the DIF block length */
1595 BUG_ON(protgroup_len % 8);
1597 pde7 = (struct lpfc_pde7 *) bpl;
1598 memset(pde7, 0, sizeof(struct lpfc_pde7));
1599 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1601 pde7->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1602 pde7->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1604 protgrp_blks = protgroup_len / 8;
1605 protgrp_bytes = protgrp_blks * blksize;
1607 /* check if this pde is crossing the 4K boundary; if so split */
1608 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1609 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1610 protgroup_offset += protgroup_remainder;
1611 protgrp_blks = protgroup_remainder / 8;
1612 protgrp_bytes = protgroup_remainder * blksize;
1614 protgroup_offset = 0;
1620 /* setup BDE's for data blocks associated with DIF data */
1622 subtotal = 0; /* total bytes processed for current prot grp */
1625 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1626 "9065 BLKGRD:%s Invalid data segment\n",
1631 dataphysaddr = sg_dma_address(sgde) + split_offset;
1632 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1633 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1635 remainder = sg_dma_len(sgde) - split_offset;
1637 if ((subtotal + remainder) <= protgrp_bytes) {
1638 /* we can use this whole buffer */
1639 bpl->tus.f.bdeSize = remainder;
1642 if ((subtotal + remainder) == protgrp_bytes)
1645 /* must split this buffer with next prot grp */
1646 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1647 split_offset += bpl->tus.f.bdeSize;
1650 subtotal += bpl->tus.f.bdeSize;
1652 if (datadir == DMA_TO_DEVICE)
1653 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1655 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1656 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1664 /* Move to the next s/g segment if possible */
1665 sgde = sg_next(sgde);
1669 if (protgroup_offset) {
1670 /* update the reference tag */
1671 reftag += protgrp_blks;
1677 if (curr_prot == protcnt) {
1679 } else if (curr_prot < protcnt) {
1680 /* advance to next prot buffer */
1681 sgpe = sg_next(sgpe);
1684 /* update the reference tag */
1685 reftag += protgrp_blks;
1687 /* if we're here, we have a bug */
1688 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1689 "9054 BLKGRD: bug in %s\n", __func__);
1700 * Given a SCSI command that supports DIF, determine composition of protection
1701 * groups involved in setting up buffer lists
1704 * for DIF (for both read and write)
1707 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1709 int ret = LPFC_PG_TYPE_INVALID;
1710 unsigned char op = scsi_get_prot_op(sc);
1713 case SCSI_PROT_READ_STRIP:
1714 case SCSI_PROT_WRITE_INSERT:
1715 ret = LPFC_PG_TYPE_NO_DIF;
1717 case SCSI_PROT_READ_INSERT:
1718 case SCSI_PROT_WRITE_STRIP:
1719 case SCSI_PROT_READ_PASS:
1720 case SCSI_PROT_WRITE_PASS:
1721 ret = LPFC_PG_TYPE_DIF_BUF;
1724 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1725 "9021 Unsupported protection op:%d\n", op);
1733 * This is the protection/DIF aware version of
1734 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1735 * two functions eventually, but for now, it's here
1738 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1739 struct lpfc_scsi_buf *lpfc_cmd)
1741 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1742 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1743 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1744 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1745 uint32_t num_bde = 0;
1746 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1747 int prot_group_type = 0;
1752 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1753 * fcp_rsp regions to the first data bde entry
1756 if (scsi_sg_count(scsi_cmnd)) {
1758 * The driver stores the segment count returned from pci_map_sg
1759 * because this a count of dma-mappings used to map the use_sg
1760 * pages. They are not guaranteed to be the same for those
1761 * architectures that implement an IOMMU.
1763 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1764 scsi_sglist(scsi_cmnd),
1765 scsi_sg_count(scsi_cmnd), datadir);
1766 if (unlikely(!datasegcnt))
1769 lpfc_cmd->seg_cnt = datasegcnt;
1770 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1771 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1772 "9067 BLKGRD: %s: Too many sg segments"
1773 " from dma_map_sg. Config %d, seg_cnt"
1775 __func__, phba->cfg_sg_seg_cnt,
1777 scsi_dma_unmap(scsi_cmnd);
1781 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1783 switch (prot_group_type) {
1784 case LPFC_PG_TYPE_NO_DIF:
1785 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1787 /* we should have 2 or more entries in buffer list */
1791 case LPFC_PG_TYPE_DIF_BUF:{
1793 * This type indicates that protection buffers are
1794 * passed to the driver, so that needs to be prepared
1797 protsegcnt = dma_map_sg(&phba->pcidev->dev,
1798 scsi_prot_sglist(scsi_cmnd),
1799 scsi_prot_sg_count(scsi_cmnd), datadir);
1800 if (unlikely(!protsegcnt)) {
1801 scsi_dma_unmap(scsi_cmnd);
1805 lpfc_cmd->prot_seg_cnt = protsegcnt;
1806 if (lpfc_cmd->prot_seg_cnt
1807 > phba->cfg_prot_sg_seg_cnt) {
1808 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1809 "9068 BLKGRD: %s: Too many prot sg "
1810 "segments from dma_map_sg. Config %d,"
1811 "prot_seg_cnt %d\n", __func__,
1812 phba->cfg_prot_sg_seg_cnt,
1813 lpfc_cmd->prot_seg_cnt);
1814 dma_unmap_sg(&phba->pcidev->dev,
1815 scsi_prot_sglist(scsi_cmnd),
1816 scsi_prot_sg_count(scsi_cmnd),
1818 scsi_dma_unmap(scsi_cmnd);
1822 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1823 datasegcnt, protsegcnt);
1824 /* we should have 3 or more entries in buffer list */
1829 case LPFC_PG_TYPE_INVALID:
1831 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1832 "9022 Unexpected protection group %i\n",
1839 * Finish initializing those IOCB fields that are dependent on the
1840 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
1841 * reinitialized since all iocb memory resources are used many times
1842 * for transmit, receive, and continuation bpl's.
1844 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1845 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1846 iocb_cmd->ulpBdeCount = 1;
1847 iocb_cmd->ulpLe = 1;
1849 fcpdl = scsi_bufflen(scsi_cmnd);
1851 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1853 * We are in DIF Type 1 mode
1854 * Every data block has a 8 byte DIF (trailer)
1855 * attached to it. Must ajust FCP data length
1857 blksize = lpfc_cmd_blksize(scsi_cmnd);
1858 diflen = (fcpdl / blksize) * 8;
1861 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1864 * Due to difference in data length between DIF/non-DIF paths,
1865 * we need to set word 4 of IOCB here
1867 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1871 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1872 "9023 Could not setup all needed BDE's"
1873 "prot_group_type=%d, num_bde=%d\n",
1874 prot_group_type, num_bde);
1879 * This function checks for BlockGuard errors detected by
1880 * the HBA. In case of errors, the ASC/ASCQ fields in the
1881 * sense buffer will be set accordingly, paired with
1882 * ILLEGAL_REQUEST to signal to the kernel that the HBA
1883 * detected corruption.
1886 * 0 - No error found
1887 * 1 - BlockGuard error found
1888 * -1 - Internal error (bad profile, ...etc)
1891 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1892 struct lpfc_iocbq *pIocbOut)
1894 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1895 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1897 uint32_t bghm = bgf->bghm;
1898 uint32_t bgstat = bgf->bgstat;
1899 uint64_t failing_sector = 0;
1901 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1902 " 0x%x lba 0x%llx blk cnt 0x%x "
1903 "bgstat=0x%x bghm=0x%x\n",
1904 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1905 blk_rq_sectors(cmd->request), bgstat, bghm);
1907 spin_lock(&_dump_buf_lock);
1908 if (!_dump_buf_done) {
1909 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
1910 " Data for %u blocks to debugfs\n",
1911 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1912 lpfc_debug_save_data(phba, cmd);
1914 /* If we have a prot sgl, save the DIF buffer */
1915 if (lpfc_prot_group_type(phba, cmd) ==
1916 LPFC_PG_TYPE_DIF_BUF) {
1917 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1918 "Saving DIF for %u blocks to debugfs\n",
1919 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1920 lpfc_debug_save_dif(phba, cmd);
1925 spin_unlock(&_dump_buf_lock);
1927 if (lpfc_bgs_get_invalid_prof(bgstat)) {
1928 cmd->result = ScsiResult(DID_ERROR, 0);
1929 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1930 " BlockGuard profile. bgstat:0x%x\n",
1936 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1937 cmd->result = ScsiResult(DID_ERROR, 0);
1938 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1939 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1945 if (lpfc_bgs_get_guard_err(bgstat)) {
1948 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1950 cmd->result = DRIVER_SENSE << 24
1951 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1952 phba->bg_guard_err_cnt++;
1953 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1954 "9055 BLKGRD: guard_tag error\n");
1957 if (lpfc_bgs_get_reftag_err(bgstat)) {
1960 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1962 cmd->result = DRIVER_SENSE << 24
1963 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1965 phba->bg_reftag_err_cnt++;
1966 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1967 "9056 BLKGRD: ref_tag error\n");
1970 if (lpfc_bgs_get_apptag_err(bgstat)) {
1973 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1975 cmd->result = DRIVER_SENSE << 24
1976 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1978 phba->bg_apptag_err_cnt++;
1979 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1980 "9061 BLKGRD: app_tag error\n");
1983 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1985 * setup sense data descriptor 0 per SPC-4 as an information
1986 * field, and put the failing LBA in it
1988 cmd->sense_buffer[8] = 0; /* Information */
1989 cmd->sense_buffer[9] = 0xa; /* Add. length */
1990 bghm /= cmd->device->sector_size;
1992 failing_sector = scsi_get_lba(cmd);
1993 failing_sector += bghm;
1995 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
1999 /* No error was reported - problem in FW? */
2000 cmd->result = ScsiResult(DID_ERROR, 0);
2001 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2002 "9057 BLKGRD: no errors reported!\n");
2010 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
2011 * @phba: The Hba for which this call is being executed.
2012 * @lpfc_cmd: The scsi buffer which is going to be mapped.
2014 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
2015 * field of @lpfc_cmd for device with SLI-4 interface spec.
2022 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2024 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2025 struct scatterlist *sgel = NULL;
2026 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2027 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
2028 struct sli4_sge *first_data_sgl;
2029 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2030 dma_addr_t physaddr;
2031 uint32_t num_bde = 0;
2033 uint32_t dma_offset = 0;
2035 struct ulp_bde64 *bde;
2038 * There are three possibilities here - use scatter-gather segment, use
2039 * the single mapping, or neither. Start the lpfc command prep by
2040 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2043 if (scsi_sg_count(scsi_cmnd)) {
2045 * The driver stores the segment count returned from pci_map_sg
2046 * because this a count of dma-mappings used to map the use_sg
2047 * pages. They are not guaranteed to be the same for those
2048 * architectures that implement an IOMMU.
2051 nseg = scsi_dma_map(scsi_cmnd);
2052 if (unlikely(!nseg))
2055 /* clear the last flag in the fcp_rsp map entry */
2056 sgl->word2 = le32_to_cpu(sgl->word2);
2057 bf_set(lpfc_sli4_sge_last, sgl, 0);
2058 sgl->word2 = cpu_to_le32(sgl->word2);
2060 first_data_sgl = sgl;
2061 lpfc_cmd->seg_cnt = nseg;
2062 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2063 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
2064 " %s: Too many sg segments from "
2065 "dma_map_sg. Config %d, seg_cnt %d\n",
2066 __func__, phba->cfg_sg_seg_cnt,
2068 scsi_dma_unmap(scsi_cmnd);
2073 * The driver established a maximum scatter-gather segment count
2074 * during probe that limits the number of sg elements in any
2075 * single scsi command. Just run through the seg_cnt and format
2077 * When using SLI-3 the driver will try to fit all the BDEs into
2078 * the IOCB. If it can't then the BDEs get added to a BPL as it
2079 * does for SLI-2 mode.
2081 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
2082 physaddr = sg_dma_address(sgel);
2083 dma_len = sg_dma_len(sgel);
2084 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2085 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2086 sgl->word2 = le32_to_cpu(sgl->word2);
2087 if ((num_bde + 1) == nseg)
2088 bf_set(lpfc_sli4_sge_last, sgl, 1);
2090 bf_set(lpfc_sli4_sge_last, sgl, 0);
2091 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2092 sgl->word2 = cpu_to_le32(sgl->word2);
2093 sgl->sge_len = cpu_to_le32(dma_len);
2094 dma_offset += dma_len;
2097 /* setup the performance hint (first data BDE) if enabled */
2098 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
2099 bde = (struct ulp_bde64 *)
2100 &(iocb_cmd->unsli3.sli3Words[5]);
2101 bde->addrLow = first_data_sgl->addr_lo;
2102 bde->addrHigh = first_data_sgl->addr_hi;
2103 bde->tus.f.bdeSize =
2104 le32_to_cpu(first_data_sgl->sge_len);
2105 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2106 bde->tus.w = cpu_to_le32(bde->tus.w);
2110 /* clear the last flag in the fcp_rsp map entry */
2111 sgl->word2 = le32_to_cpu(sgl->word2);
2112 bf_set(lpfc_sli4_sge_last, sgl, 1);
2113 sgl->word2 = cpu_to_le32(sgl->word2);
2117 * Finish initializing those IOCB fields that are dependent on the
2118 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
2119 * explicitly reinitialized.
2120 * all iocb memory resources are reused.
2122 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
2125 * Due to difference in data length between DIF/non-DIF paths,
2126 * we need to set word 4 of IOCB here
2128 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
2133 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2134 * @phba: The Hba for which this call is being executed.
2135 * @lpfc_cmd: The scsi buffer which is going to be mapped.
2137 * This routine wraps the actual DMA mapping function pointer from the
2145 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2147 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2151 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2152 * @phba: Pointer to hba context object.
2153 * @vport: Pointer to vport object.
2154 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2155 * @rsp_iocb: Pointer to response iocb object which reported error.
2157 * This function posts an event when there is a SCSI command reporting
2158 * error from the scsi device.
2161 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2162 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2163 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2164 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2165 uint32_t resp_info = fcprsp->rspStatus2;
2166 uint32_t scsi_status = fcprsp->rspStatus3;
2167 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2168 struct lpfc_fast_path_event *fast_path_evt = NULL;
2169 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2170 unsigned long flags;
2172 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2175 /* If there is queuefull or busy condition send a scsi event */
2176 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2177 (cmnd->result == SAM_STAT_BUSY)) {
2178 fast_path_evt = lpfc_alloc_fast_evt(phba);
2181 fast_path_evt->un.scsi_evt.event_type =
2183 fast_path_evt->un.scsi_evt.subcategory =
2184 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2185 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2186 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2187 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2188 &pnode->nlp_portname, sizeof(struct lpfc_name));
2189 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2190 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2191 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2192 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2193 fast_path_evt = lpfc_alloc_fast_evt(phba);
2196 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2198 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2199 LPFC_EVENT_CHECK_COND;
2200 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2202 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2203 &pnode->nlp_portname, sizeof(struct lpfc_name));
2204 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2205 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2206 fast_path_evt->un.check_cond_evt.sense_key =
2207 cmnd->sense_buffer[2] & 0xf;
2208 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2209 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2210 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2212 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2213 ((scsi_status == SAM_STAT_GOOD) &&
2214 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2216 * If status is good or resid does not match with fcp_param and
2217 * there is valid fcpi_parm, then there is a read_check error
2219 fast_path_evt = lpfc_alloc_fast_evt(phba);
2222 fast_path_evt->un.read_check_error.header.event_type =
2223 FC_REG_FABRIC_EVENT;
2224 fast_path_evt->un.read_check_error.header.subcategory =
2225 LPFC_EVENT_FCPRDCHKERR;
2226 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2227 &pnode->nlp_portname, sizeof(struct lpfc_name));
2228 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2229 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2230 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2231 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2232 fast_path_evt->un.read_check_error.fcpiparam =
2237 fast_path_evt->vport = vport;
2238 spin_lock_irqsave(&phba->hbalock, flags);
2239 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2240 spin_unlock_irqrestore(&phba->hbalock, flags);
2241 lpfc_worker_wake_up(phba);
2246 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2247 * @phba: The HBA for which this call is being executed.
2248 * @psb: The scsi buffer which is going to be un-mapped.
2250 * This routine does DMA un-mapping of scatter gather list of scsi command
2251 * field of @lpfc_cmd for device with SLI-3 interface spec.
2254 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2257 * There are only two special cases to consider. (1) the scsi command
2258 * requested scatter-gather usage or (2) the scsi command allocated
2259 * a request buffer, but did not request use_sg. There is a third
2260 * case, but it does not require resource deallocation.
2262 if (psb->seg_cnt > 0)
2263 scsi_dma_unmap(psb->pCmd);
2264 if (psb->prot_seg_cnt > 0)
2265 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2266 scsi_prot_sg_count(psb->pCmd),
2267 psb->pCmd->sc_data_direction);
2271 * lpfc_handler_fcp_err - FCP response handler
2272 * @vport: The virtual port for which this call is being executed.
2273 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2274 * @rsp_iocb: The response IOCB which contains FCP error.
2276 * This routine is called to process response IOCB with status field
2277 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2278 * based upon SCSI and FCP error.
2281 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2282 struct lpfc_iocbq *rsp_iocb)
2284 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2285 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2286 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2287 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2288 uint32_t resp_info = fcprsp->rspStatus2;
2289 uint32_t scsi_status = fcprsp->rspStatus3;
2291 uint32_t host_status = DID_OK;
2292 uint32_t rsplen = 0;
2293 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2297 * If this is a task management command, there is no
2298 * scsi packet associated with this lpfc_cmd. The driver
2301 if (fcpcmd->fcpCntl2) {
2306 if (resp_info & RSP_LEN_VALID) {
2307 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2308 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2309 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2310 "2719 Invalid response length: "
2311 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2313 cmnd->device->lun, cmnd->cmnd[0],
2315 host_status = DID_ERROR;
2318 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2319 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2320 "2757 Protocol failure detected during "
2321 "processing of FCP I/O op: "
2322 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2324 cmnd->device->lun, cmnd->cmnd[0],
2326 host_status = DID_ERROR;
2331 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2332 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2333 if (snslen > SCSI_SENSE_BUFFERSIZE)
2334 snslen = SCSI_SENSE_BUFFERSIZE;
2336 if (resp_info & RSP_LEN_VALID)
2337 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2338 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2340 lp = (uint32_t *)cmnd->sense_buffer;
2342 if (!scsi_status && (resp_info & RESID_UNDER))
2345 lpfc_printf_vlog(vport, KERN_WARNING, logit,
2346 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2347 "Data: x%x x%x x%x x%x x%x\n",
2348 cmnd->cmnd[0], scsi_status,
2349 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2350 be32_to_cpu(fcprsp->rspResId),
2351 be32_to_cpu(fcprsp->rspSnsLen),
2352 be32_to_cpu(fcprsp->rspRspLen),
2355 scsi_set_resid(cmnd, 0);
2356 if (resp_info & RESID_UNDER) {
2357 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2359 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2360 "9025 FCP Read Underrun, expected %d, "
2361 "residual %d Data: x%x x%x x%x\n",
2362 be32_to_cpu(fcpcmd->fcpDl),
2363 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2367 * If there is an under run check if under run reported by
2368 * storage array is same as the under run reported by HBA.
2369 * If this is not same, there is a dropped frame.
2371 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2373 (scsi_get_resid(cmnd) != fcpi_parm)) {
2374 lpfc_printf_vlog(vport, KERN_WARNING,
2375 LOG_FCP | LOG_FCP_ERROR,
2376 "9026 FCP Read Check Error "
2377 "and Underrun Data: x%x x%x x%x x%x\n",
2378 be32_to_cpu(fcpcmd->fcpDl),
2379 scsi_get_resid(cmnd), fcpi_parm,
2381 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2382 host_status = DID_ERROR;
2385 * The cmnd->underflow is the minimum number of bytes that must
2386 * be transferred for this command. Provided a sense condition
2387 * is not present, make sure the actual amount transferred is at
2388 * least the underflow value or fail.
2390 if (!(resp_info & SNS_LEN_VALID) &&
2391 (scsi_status == SAM_STAT_GOOD) &&
2392 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2393 < cmnd->underflow)) {
2394 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2395 "9027 FCP command x%x residual "
2396 "underrun converted to error "
2397 "Data: x%x x%x x%x\n",
2398 cmnd->cmnd[0], scsi_bufflen(cmnd),
2399 scsi_get_resid(cmnd), cmnd->underflow);
2400 host_status = DID_ERROR;
2402 } else if (resp_info & RESID_OVER) {
2403 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2404 "9028 FCP command x%x residual overrun error. "
2405 "Data: x%x x%x\n", cmnd->cmnd[0],
2406 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2407 host_status = DID_ERROR;
2410 * Check SLI validation that all the transfer was actually done
2411 * (fcpi_parm should be zero). Apply check only to reads.
2413 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2414 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2415 "9029 FCP Read Check Error Data: "
2416 "x%x x%x x%x x%x x%x\n",
2417 be32_to_cpu(fcpcmd->fcpDl),
2418 be32_to_cpu(fcprsp->rspResId),
2419 fcpi_parm, cmnd->cmnd[0], scsi_status);
2420 switch (scsi_status) {
2422 case SAM_STAT_CHECK_CONDITION:
2423 /* Fabric dropped a data frame. Fail any successful
2424 * command in which we detected dropped frames.
2425 * A status of good or some check conditions could
2426 * be considered a successful command.
2428 host_status = DID_ERROR;
2431 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2435 cmnd->result = ScsiResult(host_status, scsi_status);
2436 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2440 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2441 * @phba: The Hba for which this call is being executed.
2442 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2443 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2445 * This routine assigns scsi command result by looking into response IOCB
2446 * status field appropriately. This routine handles QUEUE FULL condition as
2447 * well by ramping down device queue depth.
2450 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2451 struct lpfc_iocbq *pIocbOut)
2453 struct lpfc_scsi_buf *lpfc_cmd =
2454 (struct lpfc_scsi_buf *) pIocbIn->context1;
2455 struct lpfc_vport *vport = pIocbIn->vport;
2456 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2457 struct lpfc_nodelist *pnode = rdata->pnode;
2458 struct scsi_cmnd *cmd;
2460 struct scsi_device *tmp_sdev;
2462 unsigned long flags;
2463 struct lpfc_fast_path_event *fast_path_evt;
2464 struct Scsi_Host *shost;
2465 uint32_t queue_depth, scsi_id;
2467 /* Sanity check on return of outstanding command */
2468 if (!(lpfc_cmd->pCmd))
2470 cmd = lpfc_cmd->pCmd;
2471 shost = cmd->device->host;
2473 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2474 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2475 /* pick up SLI4 exhange busy status from HBA */
2476 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2478 if (pnode && NLP_CHK_NODE_ACT(pnode))
2479 atomic_dec(&pnode->cmd_pending);
2481 if (lpfc_cmd->status) {
2482 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2483 (lpfc_cmd->result & IOERR_DRVR_MASK))
2484 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2485 else if (lpfc_cmd->status >= IOSTAT_CNT)
2486 lpfc_cmd->status = IOSTAT_DEFAULT;
2488 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2489 "9030 FCP cmd x%x failed <%d/%d> "
2490 "status: x%x result: x%x Data: x%x x%x\n",
2492 cmd->device ? cmd->device->id : 0xffff,
2493 cmd->device ? cmd->device->lun : 0xffff,
2494 lpfc_cmd->status, lpfc_cmd->result,
2495 pIocbOut->iocb.ulpContext,
2496 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2498 switch (lpfc_cmd->status) {
2499 case IOSTAT_FCP_RSP_ERROR:
2500 /* Call FCP RSP handler to determine result */
2501 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2503 case IOSTAT_NPORT_BSY:
2504 case IOSTAT_FABRIC_BSY:
2505 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2506 fast_path_evt = lpfc_alloc_fast_evt(phba);
2509 fast_path_evt->un.fabric_evt.event_type =
2510 FC_REG_FABRIC_EVENT;
2511 fast_path_evt->un.fabric_evt.subcategory =
2512 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2513 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2514 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2515 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2516 &pnode->nlp_portname,
2517 sizeof(struct lpfc_name));
2518 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2519 &pnode->nlp_nodename,
2520 sizeof(struct lpfc_name));
2522 fast_path_evt->vport = vport;
2523 fast_path_evt->work_evt.evt =
2524 LPFC_EVT_FASTPATH_MGMT_EVT;
2525 spin_lock_irqsave(&phba->hbalock, flags);
2526 list_add_tail(&fast_path_evt->work_evt.evt_listp,
2528 spin_unlock_irqrestore(&phba->hbalock, flags);
2529 lpfc_worker_wake_up(phba);
2531 case IOSTAT_LOCAL_REJECT:
2532 case IOSTAT_REMOTE_STOP:
2533 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
2535 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
2536 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
2538 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
2539 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
2542 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2543 lpfc_cmd->result == IOERR_NO_RESOURCES ||
2544 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2545 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2546 cmd->result = ScsiResult(DID_REQUEUE, 0);
2549 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2550 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2551 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2552 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2554 * This is a response for a BG enabled
2555 * cmd. Parse BG error
2557 lpfc_parse_bg_err(phba, lpfc_cmd,
2561 lpfc_printf_vlog(vport, KERN_WARNING,
2563 "9031 non-zero BGSTAT "
2564 "on unprotected cmd\n");
2567 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
2568 && (phba->sli_rev == LPFC_SLI_REV4)
2569 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
2570 /* This IO was aborted by the target, we don't
2571 * know the rxid and because we did not send the
2572 * ABTS we cannot generate and RRQ.
2574 lpfc_set_rrq_active(phba, pnode,
2575 lpfc_cmd->cur_iocbq.sli4_xritag,
2578 /* else: fall through */
2580 cmd->result = ScsiResult(DID_ERROR, 0);
2584 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2585 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2586 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2589 cmd->result = ScsiResult(DID_OK, 0);
2591 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2592 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2594 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2595 "0710 Iodone <%d/%d> cmd %p, error "
2596 "x%x SNS x%x x%x Data: x%x x%x\n",
2597 cmd->device->id, cmd->device->lun, cmd,
2598 cmd->result, *lp, *(lp + 3), cmd->retries,
2599 scsi_get_resid(cmd));
2602 lpfc_update_stats(phba, lpfc_cmd);
2603 result = cmd->result;
2604 if (vport->cfg_max_scsicmpl_time &&
2605 time_after(jiffies, lpfc_cmd->start_time +
2606 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2607 spin_lock_irqsave(shost->host_lock, flags);
2608 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2609 if (pnode->cmd_qdepth >
2610 atomic_read(&pnode->cmd_pending) &&
2611 (atomic_read(&pnode->cmd_pending) >
2612 LPFC_MIN_TGT_QDEPTH) &&
2613 ((cmd->cmnd[0] == READ_10) ||
2614 (cmd->cmnd[0] == WRITE_10)))
2616 atomic_read(&pnode->cmd_pending);
2618 pnode->last_change_time = jiffies;
2620 spin_unlock_irqrestore(shost->host_lock, flags);
2621 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2622 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2623 time_after(jiffies, pnode->last_change_time +
2624 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2625 spin_lock_irqsave(shost->host_lock, flags);
2626 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2628 depth = depth ? depth : 1;
2629 pnode->cmd_qdepth += depth;
2630 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2631 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2632 pnode->last_change_time = jiffies;
2633 spin_unlock_irqrestore(shost->host_lock, flags);
2637 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2639 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2640 queue_depth = cmd->device->queue_depth;
2641 scsi_id = cmd->device->id;
2642 cmd->scsi_done(cmd);
2644 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2646 * If there is a thread waiting for command completion
2647 * wake up the thread.
2649 spin_lock_irqsave(shost->host_lock, flags);
2650 lpfc_cmd->pCmd = NULL;
2651 if (lpfc_cmd->waitq)
2652 wake_up(lpfc_cmd->waitq);
2653 spin_unlock_irqrestore(shost->host_lock, flags);
2654 lpfc_release_scsi_buf(phba, lpfc_cmd);
2659 lpfc_rampup_queue_depth(vport, queue_depth);
2662 * Check for queue full. If the lun is reporting queue full, then
2663 * back off the lun queue depth to prevent target overloads.
2665 if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2666 NLP_CHK_NODE_ACT(pnode)) {
2667 shost_for_each_device(tmp_sdev, shost) {
2668 if (tmp_sdev->id != scsi_id)
2670 depth = scsi_track_queue_full(tmp_sdev,
2671 tmp_sdev->queue_depth-1);
2674 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2675 "0711 detected queue full - lun queue "
2676 "depth adjusted to %d.\n", depth);
2677 lpfc_send_sdev_queuedepth_change_event(phba, vport,
2685 * If there is a thread waiting for command completion
2686 * wake up the thread.
2688 spin_lock_irqsave(shost->host_lock, flags);
2689 lpfc_cmd->pCmd = NULL;
2690 if (lpfc_cmd->waitq)
2691 wake_up(lpfc_cmd->waitq);
2692 spin_unlock_irqrestore(shost->host_lock, flags);
2694 lpfc_release_scsi_buf(phba, lpfc_cmd);
2698 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2699 * @data: A pointer to the immediate command data portion of the IOCB.
2700 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2702 * The routine copies the entire FCP command from @fcp_cmnd to @data while
2703 * byte swapping the data to big endian format for transmission on the wire.
2706 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2709 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2710 i += sizeof(uint32_t), j++) {
2711 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2716 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2717 * @vport: The virtual port for which this call is being executed.
2718 * @lpfc_cmd: The scsi command which needs to send.
2719 * @pnode: Pointer to lpfc_nodelist.
2721 * This routine initializes fcp_cmnd and iocb data structure from scsi command
2722 * to transfer for device with SLI3 interface spec.
2725 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2726 struct lpfc_nodelist *pnode)
2728 struct lpfc_hba *phba = vport->phba;
2729 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2730 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2731 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2732 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2733 int datadir = scsi_cmnd->sc_data_direction;
2736 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2739 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2740 /* clear task management bits */
2741 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2743 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2744 &lpfc_cmd->fcp_cmnd->fcp_lun);
2746 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2748 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2750 case HEAD_OF_QUEUE_TAG:
2751 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2753 case ORDERED_QUEUE_TAG:
2754 fcp_cmnd->fcpCntl1 = ORDERED_Q;
2757 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2761 fcp_cmnd->fcpCntl1 = 0;
2764 * There are three possibilities here - use scatter-gather segment, use
2765 * the single mapping, or neither. Start the lpfc command prep by
2766 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2769 if (scsi_sg_count(scsi_cmnd)) {
2770 if (datadir == DMA_TO_DEVICE) {
2771 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2772 if (phba->sli_rev < LPFC_SLI_REV4) {
2773 iocb_cmd->un.fcpi.fcpi_parm = 0;
2774 iocb_cmd->ulpPU = 0;
2776 iocb_cmd->ulpPU = PARM_READ_CHECK;
2777 fcp_cmnd->fcpCntl3 = WRITE_DATA;
2778 phba->fc4OutputRequests++;
2780 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2781 iocb_cmd->ulpPU = PARM_READ_CHECK;
2782 fcp_cmnd->fcpCntl3 = READ_DATA;
2783 phba->fc4InputRequests++;
2786 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2787 iocb_cmd->un.fcpi.fcpi_parm = 0;
2788 iocb_cmd->ulpPU = 0;
2789 fcp_cmnd->fcpCntl3 = 0;
2790 phba->fc4ControlRequests++;
2792 if (phba->sli_rev == 3 &&
2793 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2794 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2796 * Finish initializing those IOCB fields that are independent
2797 * of the scsi_cmnd request_buffer
2799 piocbq->iocb.ulpContext = pnode->nlp_rpi;
2800 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2801 piocbq->iocb.ulpFCP2Rcvy = 1;
2803 piocbq->iocb.ulpFCP2Rcvy = 0;
2805 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2806 piocbq->context1 = lpfc_cmd;
2807 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2808 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2809 piocbq->vport = vport;
2813 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2814 * @vport: The virtual port for which this call is being executed.
2815 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2816 * @lun: Logical unit number.
2817 * @task_mgmt_cmd: SCSI task management command.
2819 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2820 * for device with SLI-3 interface spec.
2827 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2828 struct lpfc_scsi_buf *lpfc_cmd,
2830 uint8_t task_mgmt_cmd)
2832 struct lpfc_iocbq *piocbq;
2834 struct fcp_cmnd *fcp_cmnd;
2835 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2836 struct lpfc_nodelist *ndlp = rdata->pnode;
2838 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2839 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2842 piocbq = &(lpfc_cmd->cur_iocbq);
2843 piocbq->vport = vport;
2845 piocb = &piocbq->iocb;
2847 fcp_cmnd = lpfc_cmd->fcp_cmnd;
2848 /* Clear out any old data in the FCP command area */
2849 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2850 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2851 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2852 if (vport->phba->sli_rev == 3 &&
2853 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2854 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2855 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2856 piocb->ulpContext = ndlp->nlp_rpi;
2857 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2858 piocb->ulpFCP2Rcvy = 1;
2860 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2862 /* ulpTimeout is only one byte */
2863 if (lpfc_cmd->timeout > 0xff) {
2865 * Do not timeout the command at the firmware level.
2866 * The driver will provide the timeout mechanism.
2868 piocb->ulpTimeout = 0;
2870 piocb->ulpTimeout = lpfc_cmd->timeout;
2872 if (vport->phba->sli_rev == LPFC_SLI_REV4)
2873 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2879 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
2880 * @phba: The hba struct for which this call is being executed.
2881 * @dev_grp: The HBA PCI-Device group number.
2883 * This routine sets up the SCSI interface API function jump table in @phba
2885 * Returns: 0 - success, -ENODEV - failure.
2888 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2891 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2892 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2895 case LPFC_PCI_DEV_LP:
2896 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2897 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2898 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2899 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
2901 case LPFC_PCI_DEV_OC:
2902 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2903 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2904 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2905 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
2908 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2909 "1418 Invalid HBA PCI-device group: 0x%x\n",
2914 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2915 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2920 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2921 * @phba: The Hba for which this call is being executed.
2922 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2923 * @rspiocbq: Pointer to lpfc_iocbq data structure.
2925 * This routine is IOCB completion routine for device reset and target reset
2926 * routine. This routine release scsi buffer associated with lpfc_cmd.
2929 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2930 struct lpfc_iocbq *cmdiocbq,
2931 struct lpfc_iocbq *rspiocbq)
2933 struct lpfc_scsi_buf *lpfc_cmd =
2934 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2936 lpfc_release_scsi_buf(phba, lpfc_cmd);
2941 * lpfc_info - Info entry point of scsi_host_template data structure
2942 * @host: The scsi host for which this call is being executed.
2944 * This routine provides module information about hba.
2947 * Pointer to char - Success.
2950 lpfc_info(struct Scsi_Host *host)
2952 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2953 struct lpfc_hba *phba = vport->phba;
2955 static char lpfcinfobuf[384];
2957 memset(lpfcinfobuf,0,384);
2958 if (phba && phba->pcidev){
2959 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2960 len = strlen(lpfcinfobuf);
2961 snprintf(lpfcinfobuf + len,
2963 " on PCI bus %02x device %02x irq %d",
2964 phba->pcidev->bus->number,
2965 phba->pcidev->devfn,
2967 len = strlen(lpfcinfobuf);
2968 if (phba->Port[0]) {
2969 snprintf(lpfcinfobuf + len,
2974 len = strlen(lpfcinfobuf);
2975 if (phba->sli4_hba.link_state.logical_speed) {
2976 snprintf(lpfcinfobuf + len,
2978 " Logical Link Speed: %d Mbps",
2979 phba->sli4_hba.link_state.logical_speed * 10);
2986 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2987 * @phba: The Hba for which this call is being executed.
2989 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
2990 * The default value of cfg_poll_tmo is 10 milliseconds.
2992 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2994 unsigned long poll_tmo_expires =
2995 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2997 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2998 mod_timer(&phba->fcp_poll_timer,
3003 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
3004 * @phba: The Hba for which this call is being executed.
3006 * This routine starts the fcp_poll_timer of @phba.
3008 void lpfc_poll_start_timer(struct lpfc_hba * phba)
3010 lpfc_poll_rearm_timer(phba);
3014 * lpfc_poll_timeout - Restart polling timer
3015 * @ptr: Map to lpfc_hba data structure pointer.
3017 * This routine restarts fcp_poll timer, when FCP ring polling is enable
3018 * and FCP Ring interrupt is disable.
3021 void lpfc_poll_timeout(unsigned long ptr)
3023 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
3025 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3026 lpfc_sli_handle_fast_ring_event(phba,
3027 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3029 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3030 lpfc_poll_rearm_timer(phba);
3035 * lpfc_queuecommand - scsi_host_template queuecommand entry point
3036 * @cmnd: Pointer to scsi_cmnd data structure.
3037 * @done: Pointer to done routine.
3039 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
3040 * This routine prepares an IOCB from scsi command and provides to firmware.
3041 * The @done callback is invoked after driver finished processing the command.
3045 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
3048 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
3050 struct Scsi_Host *shost = cmnd->device->host;
3051 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3052 struct lpfc_hba *phba = vport->phba;
3053 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3054 struct lpfc_nodelist *ndlp;
3055 struct lpfc_scsi_buf *lpfc_cmd;
3056 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3059 err = fc_remote_port_chkready(rport);
3062 goto out_fail_command;
3064 ndlp = rdata->pnode;
3066 if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
3067 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3069 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
3070 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
3071 " op:%02x str=%s without registering for"
3072 " BlockGuard - Rejecting command\n",
3073 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3074 dif_op_str[scsi_get_prot_op(cmnd)]);
3075 goto out_fail_command;
3079 * Catch race where our node has transitioned, but the
3080 * transport is still transitioning.
3082 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
3083 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
3084 goto out_fail_command;
3086 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
3089 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
3090 if (lpfc_cmd == NULL) {
3091 lpfc_rampdown_queue_depth(phba);
3093 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3094 "0707 driver's buffer pool is empty, "
3100 * Store the midlayer's command structure for the completion phase
3101 * and complete the command initialization.
3103 lpfc_cmd->pCmd = cmnd;
3104 lpfc_cmd->rdata = rdata;
3105 lpfc_cmd->timeout = 0;
3106 lpfc_cmd->start_time = jiffies;
3107 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
3108 cmnd->scsi_done = done;
3110 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3111 if (vport->phba->cfg_enable_bg) {
3112 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3113 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
3115 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3116 dif_op_str[scsi_get_prot_op(cmnd)]);
3117 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3118 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
3119 "%02x %02x %02x %02x %02x\n",
3120 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
3121 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
3122 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
3124 if (cmnd->cmnd[0] == READ_10)
3125 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3126 "9035 BLKGRD: READ @ sector %llu, "
3128 (unsigned long long)scsi_get_lba(cmnd),
3129 blk_rq_sectors(cmnd->request));
3130 else if (cmnd->cmnd[0] == WRITE_10)
3131 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3132 "9036 BLKGRD: WRITE @ sector %llu, "
3133 "count %u cmd=%p\n",
3134 (unsigned long long)scsi_get_lba(cmnd),
3135 blk_rq_sectors(cmnd->request),
3139 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3141 if (vport->phba->cfg_enable_bg) {
3142 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3143 "9038 BLKGRD: rcvd unprotected cmd:"
3144 "%02x op:%02x str=%s\n",
3145 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3146 dif_op_str[scsi_get_prot_op(cmnd)]);
3147 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3148 "9039 BLKGRD: CDB: %02x %02x %02x "
3149 "%02x %02x %02x %02x %02x %02x %02x\n",
3150 cmnd->cmnd[0], cmnd->cmnd[1],
3151 cmnd->cmnd[2], cmnd->cmnd[3],
3152 cmnd->cmnd[4], cmnd->cmnd[5],
3153 cmnd->cmnd[6], cmnd->cmnd[7],
3154 cmnd->cmnd[8], cmnd->cmnd[9]);
3155 if (cmnd->cmnd[0] == READ_10)
3156 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3157 "9040 dbg: READ @ sector %llu, "
3159 (unsigned long long)scsi_get_lba(cmnd),
3160 blk_rq_sectors(cmnd->request));
3161 else if (cmnd->cmnd[0] == WRITE_10)
3162 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3163 "9041 dbg: WRITE @ sector %llu, "
3164 "count %u cmd=%p\n",
3165 (unsigned long long)scsi_get_lba(cmnd),
3166 blk_rq_sectors(cmnd->request), cmnd);
3168 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3169 "9042 dbg: parser not implemented\n");
3171 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3175 goto out_host_busy_free_buf;
3177 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
3179 atomic_inc(&ndlp->cmd_pending);
3180 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3181 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3183 atomic_dec(&ndlp->cmd_pending);
3184 goto out_host_busy_free_buf;
3186 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3187 spin_unlock(shost->host_lock);
3188 lpfc_sli_handle_fast_ring_event(phba,
3189 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3191 spin_lock(shost->host_lock);
3192 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3193 lpfc_poll_rearm_timer(phba);
3198 out_host_busy_free_buf:
3199 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3200 lpfc_release_scsi_buf(phba, lpfc_cmd);
3202 return SCSI_MLQUEUE_HOST_BUSY;
3205 return SCSI_MLQUEUE_TARGET_BUSY;
3212 static DEF_SCSI_QCMD(lpfc_queuecommand)
3215 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3216 * @cmnd: Pointer to scsi_cmnd data structure.
3218 * This routine aborts @cmnd pending in base driver.
3225 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3227 struct Scsi_Host *shost = cmnd->device->host;
3228 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3229 struct lpfc_hba *phba = vport->phba;
3230 struct lpfc_iocbq *iocb;
3231 struct lpfc_iocbq *abtsiocb;
3232 struct lpfc_scsi_buf *lpfc_cmd;
3235 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3237 ret = fc_block_scsi_eh(cmnd);
3240 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3242 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3243 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
3244 "x%x ID %d LUN %d\n",
3245 ret, cmnd->device->id, cmnd->device->lun);
3250 * If pCmd field of the corresponding lpfc_scsi_buf structure
3251 * points to a different SCSI command, then the driver has
3252 * already completed this command, but the midlayer did not
3253 * see the completion before the eh fired. Just return
3256 iocb = &lpfc_cmd->cur_iocbq;
3257 if (lpfc_cmd->pCmd != cmnd)
3260 BUG_ON(iocb->context1 != lpfc_cmd);
3262 abtsiocb = lpfc_sli_get_iocbq(phba);
3263 if (abtsiocb == NULL) {
3269 * The scsi command can not be in txq and it is in flight because the
3270 * pCmd is still pointig at the SCSI command we have to abort. There
3271 * is no need to search the txcmplq. Just send an abort to the FW.
3275 icmd = &abtsiocb->iocb;
3276 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3277 icmd->un.acxri.abortContextTag = cmd->ulpContext;
3278 if (phba->sli_rev == LPFC_SLI_REV4)
3279 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3281 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3284 icmd->ulpClass = cmd->ulpClass;
3286 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3287 abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3288 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3290 if (lpfc_is_link_up(phba))
3291 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3293 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3295 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3296 abtsiocb->vport = vport;
3297 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3299 lpfc_sli_release_iocbq(phba, abtsiocb);
3304 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3305 lpfc_sli_handle_fast_ring_event(phba,
3306 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3308 lpfc_cmd->waitq = &waitq;
3309 /* Wait for abort to complete */
3310 wait_event_timeout(waitq,
3311 (lpfc_cmd->pCmd != cmnd),
3312 (2*vport->cfg_devloss_tmo*HZ));
3314 spin_lock_irq(shost->host_lock);
3315 lpfc_cmd->waitq = NULL;
3316 spin_unlock_irq(shost->host_lock);
3318 if (lpfc_cmd->pCmd == cmnd) {
3320 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3321 "0748 abort handler timed out waiting "
3322 "for abort to complete: ret %#x, ID %d, "
3324 ret, cmnd->device->id, cmnd->device->lun);
3328 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3329 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3330 "LUN %d\n", ret, cmnd->device->id,
3336 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3338 switch (task_mgmt_cmd) {
3339 case FCP_ABORT_TASK_SET:
3340 return "ABORT_TASK_SET";
3341 case FCP_CLEAR_TASK_SET:
3342 return "FCP_CLEAR_TASK_SET";
3344 return "FCP_BUS_RESET";
3346 return "FCP_LUN_RESET";
3347 case FCP_TARGET_RESET:
3348 return "FCP_TARGET_RESET";
3350 return "FCP_CLEAR_ACA";
3351 case FCP_TERMINATE_TASK:
3352 return "FCP_TERMINATE_TASK";
3359 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3360 * @vport: The virtual port for which this call is being executed.
3361 * @rdata: Pointer to remote port local data
3362 * @tgt_id: Target ID of remote device.
3363 * @lun_id: Lun number for the TMF
3364 * @task_mgmt_cmd: type of TMF to send
3366 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3374 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3375 unsigned tgt_id, unsigned int lun_id,
3376 uint8_t task_mgmt_cmd)
3378 struct lpfc_hba *phba = vport->phba;
3379 struct lpfc_scsi_buf *lpfc_cmd;
3380 struct lpfc_iocbq *iocbq;
3381 struct lpfc_iocbq *iocbqrsp;
3382 struct lpfc_nodelist *pnode = rdata->pnode;
3386 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3389 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
3390 if (lpfc_cmd == NULL)
3392 lpfc_cmd->timeout = 60;
3393 lpfc_cmd->rdata = rdata;
3395 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3398 lpfc_release_scsi_buf(phba, lpfc_cmd);
3402 iocbq = &lpfc_cmd->cur_iocbq;
3403 iocbqrsp = lpfc_sli_get_iocbq(phba);
3404 if (iocbqrsp == NULL) {
3405 lpfc_release_scsi_buf(phba, lpfc_cmd);
3409 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3410 "0702 Issue %s to TGT %d LUN %d "
3411 "rpi x%x nlp_flag x%x\n",
3412 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3413 pnode->nlp_rpi, pnode->nlp_flag);
3415 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3416 iocbq, iocbqrsp, lpfc_cmd->timeout);
3417 if (status != IOCB_SUCCESS) {
3418 if (status == IOCB_TIMEDOUT) {
3419 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3420 ret = TIMEOUT_ERROR;
3423 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3424 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3425 "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
3426 lpfc_taskmgmt_name(task_mgmt_cmd),
3427 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3428 iocbqrsp->iocb.un.ulpWord[4]);
3429 } else if (status == IOCB_BUSY)
3434 lpfc_sli_release_iocbq(phba, iocbqrsp);
3436 if (ret != TIMEOUT_ERROR)
3437 lpfc_release_scsi_buf(phba, lpfc_cmd);
3443 * lpfc_chk_tgt_mapped -
3444 * @vport: The virtual port to check on
3445 * @cmnd: Pointer to scsi_cmnd data structure.
3447 * This routine delays until the scsi target (aka rport) for the
3448 * command exists (is present and logged in) or we declare it non-existent.
3455 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3457 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3458 struct lpfc_nodelist *pnode;
3459 unsigned long later;
3462 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3463 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3466 pnode = rdata->pnode;
3468 * If target is not in a MAPPED state, delay until
3469 * target is rediscovered or devloss timeout expires.
3471 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3472 while (time_after(later, jiffies)) {
3473 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3475 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3477 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3478 rdata = cmnd->device->hostdata;
3481 pnode = rdata->pnode;
3483 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3484 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3490 * lpfc_reset_flush_io_context -
3491 * @vport: The virtual port (scsi_host) for the flush context
3492 * @tgt_id: If aborting by Target contect - specifies the target id
3493 * @lun_id: If aborting by Lun context - specifies the lun id
3494 * @context: specifies the context level to flush at.
3496 * After a reset condition via TMF, we need to flush orphaned i/o
3497 * contexts from the adapter. This routine aborts any contexts
3498 * outstanding, then waits for their completions. The wait is
3499 * bounded by devloss_tmo though.
3506 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3507 uint64_t lun_id, lpfc_ctx_cmd context)
3509 struct lpfc_hba *phba = vport->phba;
3510 unsigned long later;
3513 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3515 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3516 tgt_id, lun_id, context);
3517 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3518 while (time_after(later, jiffies) && cnt) {
3519 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3520 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3523 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3524 "0724 I/O flush failure for context %s : cnt x%x\n",
3525 ((context == LPFC_CTX_LUN) ? "LUN" :
3526 ((context == LPFC_CTX_TGT) ? "TGT" :
3527 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3535 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3536 * @cmnd: Pointer to scsi_cmnd data structure.
3538 * This routine does a device reset by sending a LUN_RESET task management
3546 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3548 struct Scsi_Host *shost = cmnd->device->host;
3549 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3550 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3551 struct lpfc_nodelist *pnode;
3552 unsigned tgt_id = cmnd->device->id;
3553 unsigned int lun_id = cmnd->device->lun;
3554 struct lpfc_scsi_event_header scsi_event;
3558 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3559 "0798 Device Reset rport failure: rdata x%p\n", rdata);
3562 pnode = rdata->pnode;
3563 status = fc_block_scsi_eh(cmnd);
3567 status = lpfc_chk_tgt_mapped(vport, cmnd);
3568 if (status == FAILED) {
3569 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3570 "0721 Device Reset rport failure: rdata x%p\n", rdata);
3574 scsi_event.event_type = FC_REG_SCSI_EVENT;
3575 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3576 scsi_event.lun = lun_id;
3577 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3578 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3580 fc_host_post_vendor_event(shost, fc_get_event_number(),
3581 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3583 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3586 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3587 "0713 SCSI layer issued Device Reset (%d, %d) "
3588 "return x%x\n", tgt_id, lun_id, status);
3591 * We have to clean up i/o as : they may be orphaned by the TMF;
3592 * or if the TMF failed, they may be in an indeterminate state.
3594 * We will report success if all the i/o aborts successfully.
3596 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3602 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3603 * @cmnd: Pointer to scsi_cmnd data structure.
3605 * This routine does a target reset by sending a TARGET_RESET task management
3613 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3615 struct Scsi_Host *shost = cmnd->device->host;
3616 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3617 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3618 struct lpfc_nodelist *pnode;
3619 unsigned tgt_id = cmnd->device->id;
3620 unsigned int lun_id = cmnd->device->lun;
3621 struct lpfc_scsi_event_header scsi_event;
3625 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3626 "0799 Target Reset rport failure: rdata x%p\n", rdata);
3629 pnode = rdata->pnode;
3630 status = fc_block_scsi_eh(cmnd);
3634 status = lpfc_chk_tgt_mapped(vport, cmnd);
3635 if (status == FAILED) {
3636 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3637 "0722 Target Reset rport failure: rdata x%p\n", rdata);
3641 scsi_event.event_type = FC_REG_SCSI_EVENT;
3642 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3644 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3645 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3647 fc_host_post_vendor_event(shost, fc_get_event_number(),
3648 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3650 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3653 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3654 "0723 SCSI layer issued Target Reset (%d, %d) "
3655 "return x%x\n", tgt_id, lun_id, status);
3658 * We have to clean up i/o as : they may be orphaned by the TMF;
3659 * or if the TMF failed, they may be in an indeterminate state.
3661 * We will report success if all the i/o aborts successfully.
3663 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3669 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3670 * @cmnd: Pointer to scsi_cmnd data structure.
3672 * This routine does target reset to all targets on @cmnd->device->host.
3673 * This emulates Parallel SCSI Bus Reset Semantics.
3680 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3682 struct Scsi_Host *shost = cmnd->device->host;
3683 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3684 struct lpfc_nodelist *ndlp = NULL;
3685 struct lpfc_scsi_event_header scsi_event;
3687 int ret = SUCCESS, status, i;
3689 scsi_event.event_type = FC_REG_SCSI_EVENT;
3690 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3692 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3693 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3695 fc_host_post_vendor_event(shost, fc_get_event_number(),
3696 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3698 ret = fc_block_scsi_eh(cmnd);
3703 * Since the driver manages a single bus device, reset all
3704 * targets known to the driver. Should any target reset
3705 * fail, this routine returns failure to the midlayer.
3707 for (i = 0; i < LPFC_MAX_TARGET; i++) {
3708 /* Search for mapped node by target ID */
3710 spin_lock_irq(shost->host_lock);
3711 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3712 if (!NLP_CHK_NODE_ACT(ndlp))
3714 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3715 ndlp->nlp_sid == i &&
3721 spin_unlock_irq(shost->host_lock);
3725 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3726 i, 0, FCP_TARGET_RESET);
3728 if (status != SUCCESS) {
3729 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3730 "0700 Bus Reset on target %d failed\n",
3736 * We have to clean up i/o as : they may be orphaned by the TMFs
3737 * above; or if any of the TMFs failed, they may be in an
3738 * indeterminate state.
3739 * We will report success if all the i/o aborts successfully.
3742 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3743 if (status != SUCCESS)
3746 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3747 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3752 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3753 * @sdev: Pointer to scsi_device.
3755 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
3756 * globally available list of scsi buffers. This routine also makes sure scsi
3757 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3758 * of scsi buffer exists for the lifetime of the driver.
3765 lpfc_slave_alloc(struct scsi_device *sdev)
3767 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3768 struct lpfc_hba *phba = vport->phba;
3769 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3771 uint32_t num_to_alloc = 0;
3772 int num_allocated = 0;
3775 if (!rport || fc_remote_port_chkready(rport))
3778 sdev->hostdata = rport->dd_data;
3779 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
3782 * Populate the cmds_per_lun count scsi_bufs into this host's globally
3783 * available list of scsi buffers. Don't allocate more than the
3784 * HBA limit conveyed to the midlayer via the host structure. The
3785 * formula accounts for the lun_queue_depth + error handlers + 1
3786 * extra. This list of scsi bufs exists for the lifetime of the driver.
3788 total = phba->total_scsi_bufs;
3789 num_to_alloc = vport->cfg_lun_queue_depth + 2;
3791 /* If allocated buffers are enough do nothing */
3792 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3795 /* Allow some exchanges to be available always to complete discovery */
3796 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3797 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3798 "0704 At limitation of %d preallocated "
3799 "command buffers\n", total);
3801 /* Allow some exchanges to be available always to complete discovery */
3802 } else if (total + num_to_alloc >
3803 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3804 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3805 "0705 Allocation request of %d "
3806 "command buffers will exceed max of %d. "
3807 "Reducing allocation request to %d.\n",
3808 num_to_alloc, phba->cfg_hba_queue_depth,
3809 (phba->cfg_hba_queue_depth - total));
3810 num_to_alloc = phba->cfg_hba_queue_depth - total;
3812 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3813 if (num_to_alloc != num_allocated) {
3814 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3815 "0708 Allocation request of %d "
3816 "command buffers did not succeed. "
3817 "Allocated %d buffers.\n",
3818 num_to_alloc, num_allocated);
3820 if (num_allocated > 0)
3821 phba->total_scsi_bufs += num_allocated;
3826 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3827 * @sdev: Pointer to scsi_device.
3829 * This routine configures following items
3830 * - Tag command queuing support for @sdev if supported.
3831 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3837 lpfc_slave_configure(struct scsi_device *sdev)
3839 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3840 struct lpfc_hba *phba = vport->phba;
3842 if (sdev->tagged_supported)
3843 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3845 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3847 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3848 lpfc_sli_handle_fast_ring_event(phba,
3849 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3850 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3851 lpfc_poll_rearm_timer(phba);
3858 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3859 * @sdev: Pointer to scsi_device.
3861 * This routine sets @sdev hostatdata filed to null.
3864 lpfc_slave_destroy(struct scsi_device *sdev)
3866 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3867 struct lpfc_hba *phba = vport->phba;
3868 atomic_dec(&phba->sdev_cnt);
3869 sdev->hostdata = NULL;
3874 struct scsi_host_template lpfc_template = {
3875 .module = THIS_MODULE,
3876 .name = LPFC_DRIVER_NAME,
3878 .queuecommand = lpfc_queuecommand,
3879 .eh_abort_handler = lpfc_abort_handler,
3880 .eh_device_reset_handler = lpfc_device_reset_handler,
3881 .eh_target_reset_handler = lpfc_target_reset_handler,
3882 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3883 .slave_alloc = lpfc_slave_alloc,
3884 .slave_configure = lpfc_slave_configure,
3885 .slave_destroy = lpfc_slave_destroy,
3886 .scan_finished = lpfc_scan_finished,
3888 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3889 .cmd_per_lun = LPFC_CMD_PER_LUN,
3890 .use_clustering = ENABLE_CLUSTERING,
3891 .shost_attrs = lpfc_hba_attrs,
3892 .max_sectors = 0xFFFF,
3893 .vendor_id = LPFC_NL_VENDOR_ID,
3894 .change_queue_depth = lpfc_change_queue_depth,
3897 struct scsi_host_template lpfc_vport_template = {
3898 .module = THIS_MODULE,
3899 .name = LPFC_DRIVER_NAME,
3901 .queuecommand = lpfc_queuecommand,
3902 .eh_abort_handler = lpfc_abort_handler,
3903 .eh_device_reset_handler = lpfc_device_reset_handler,
3904 .eh_target_reset_handler = lpfc_target_reset_handler,
3905 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3906 .slave_alloc = lpfc_slave_alloc,
3907 .slave_configure = lpfc_slave_configure,
3908 .slave_destroy = lpfc_slave_destroy,
3909 .scan_finished = lpfc_scan_finished,
3911 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3912 .cmd_per_lun = LPFC_CMD_PER_LUN,
3913 .use_clustering = ENABLE_CLUSTERING,
3914 .shost_attrs = lpfc_vport_attrs,
3915 .max_sectors = 0xFFFF,
3916 .change_queue_depth = lpfc_change_queue_depth,