projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] lpfc 8.3.27: Fix queue allocation failure recovery
[deliverable/linux.git] / drivers / scsi / lpfc / lpfc_scsi.c
CommitLineData
dea3101e 1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
c44ce173 3 * Fibre Channel Host Bus Adapters. *
792581de 4 * Copyright (C) 2004-2011 Emulex. All rights reserved. *
c44ce173 5 * EMULEX and SLI are trademarks of Emulex. *
dea3101e 6 * www.emulex.com *
c44ce173 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
dea3101e 8 * *
9 * This program is free software; you can redistribute it and/or *
c44ce173
JSEC		 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. *
dea3101e 20 *******************************************************************/
dea3101e 21#include <linux/pci.h>
5a0e3ad6 22#include <linux/slab.h>
dea3101e 23#include <linux/interrupt.h>
a90f5684 24#include <linux/delay.h>
e2a0a9d6 25#include <asm/unaligned.h>
dea3101e 26
27#include <scsi/scsi.h>
28#include <scsi/scsi_device.h>
e2a0a9d6 29#include <scsi/scsi_eh.h>
dea3101e 30#include <scsi/scsi_host.h>
31#include <scsi/scsi_tcq.h>
32#include <scsi/scsi_transport_fc.h>
33
34#include "lpfc_version.h"
da0436e9 35#include "lpfc_hw4.h"
dea3101e 36#include "lpfc_hw.h"
37#include "lpfc_sli.h"
da0436e9 38#include "lpfc_sli4.h"
ea2151b4 39#include "lpfc_nl.h"
dea3101e 40#include "lpfc_disc.h"
41#include "lpfc_scsi.h"
42#include "lpfc.h"
43#include "lpfc_logmsg.h"
44#include "lpfc_crtn.h"
92d7f7b0 45#include "lpfc_vport.h"
dea3101e 46
47#define LPFC_RESET_WAIT 2
48#define LPFC_ABORT_WAIT 2
49
e2a0a9d6
JS		 50int _dump_buf_done;
51
52static char *dif_op_str[] = {
53 "SCSI_PROT_NORMAL",
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",
e2a0a9d6 60};
da0436e9
JS		 61static void
62lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
1c6f4ef5
JS		 63static void
64lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
e2a0a9d6
JS		 65
66static void
6a9c52cf 67lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
e2a0a9d6
JS		 68{
69 void *src, *dst;
70 struct scatterlist *sgde = scsi_sglist(cmnd);
71
72 if (!_dump_buf_data) {
6a9c52cf
JS		 73 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
74 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
e2a0a9d6
JS		 75 __func__);
76 return;
77 }
78
79
80 if (!sgde) {
6a9c52cf
JS		 81 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
82 "9051 BLKGRD: ERROR: data scatterlist is null\n");
e2a0a9d6
JS		 83 return;
84 }
85
86 dst = (void *) _dump_buf_data;
87 while (sgde) {
88 src = sg_virt(sgde);
89 memcpy(dst, src, sgde->length);
90 dst += sgde->length;
91 sgde = sg_next(sgde);
92 }
93}
94
95static void
6a9c52cf 96lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
e2a0a9d6
JS		 97{
98 void *src, *dst;
99 struct scatterlist *sgde = scsi_prot_sglist(cmnd);
100
101 if (!_dump_buf_dif) {
6a9c52cf
JS		 102 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
103 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
e2a0a9d6
JS		 104 __func__);
105 return;
106 }
107
108 if (!sgde) {
6a9c52cf
JS		 109 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
110 "9053 BLKGRD: ERROR: prot scatterlist is null\n");
e2a0a9d6
JS		 111 return;
112 }
113
114 dst = _dump_buf_dif;
115 while (sgde) {
116 src = sg_virt(sgde);
117 memcpy(dst, src, sgde->length);
118 dst += sgde->length;
119 sgde = sg_next(sgde);
120 }
121}
122
f1126688
JS		 123/**
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.
127 *
128 * This function is called from the lpfc_prep_task_mgmt_cmd function to
129 * set the last bit in the response sge entry.
130 **/
131static void
132lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
133 struct lpfc_scsi_buf *lpfc_cmd)
134{
135 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
136 if (sgl) {
137 sgl += 1;
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);
141 }
142}
143
ea2151b4 144/**
3621a710 145 * lpfc_update_stats - Update statistical data for the command completion
ea2151b4
JS		 146 * @phba: Pointer to HBA object.
147 * @lpfc_cmd: lpfc scsi command object pointer.
148 *
149 * This function is called when there is a command completion and this
150 * function updates the statistical data for the command completion.
151 **/
152static void
153lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
154{
155 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
156 struct lpfc_nodelist *pnode = rdata->pnode;
157 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
158 unsigned long flags;
159 struct Scsi_Host *shost = cmd->device->host;
160 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
161 unsigned long latency;
162 int i;
163
164 if (cmd->result)
165 return;
166
9f1e1b50
JS		 167 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
168
ea2151b4
JS		 169 spin_lock_irqsave(shost->host_lock, flags);
170 if (!vport->stat_data_enabled ||
171 vport->stat_data_blocked ||
5989b8d4 172 !pnode ||
ea2151b4
JS		 173 !pnode->lat_data ||
174 (phba->bucket_type == LPFC_NO_BUCKET)) {
175 spin_unlock_irqrestore(shost->host_lock, flags);
176 return;
177 }
ea2151b4
JS		 178
179 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
180 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
181 phba->bucket_step;
9f1e1b50
JS		 182 /* check array subscript bounds */
183 if (i < 0)
184 i = 0;
185 else if (i >= LPFC_MAX_BUCKET_COUNT)
186 i = LPFC_MAX_BUCKET_COUNT - 1;
ea2151b4
JS		 187 } else {
188 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
189 if (latency <= (phba->bucket_base +
190 ((1<<i)*phba->bucket_step)))
191 break;
192 }
193
194 pnode->lat_data[i].cmd_count++;
195 spin_unlock_irqrestore(shost->host_lock, flags);
196}
197
ea2151b4 198/**
3621a710 199 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
ea2151b4
JS		 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.
206 *
207 * This function sends an event to the mgmt application indicating
208 * there is a change in the scsi device queue depth.
209 **/
210static void
211lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
212 struct lpfc_vport *vport,
213 struct lpfc_nodelist *ndlp,
214 uint32_t lun,
215 uint32_t old_val,
216 uint32_t new_val)
217{
218 struct lpfc_fast_path_event *fast_path_evt;
219 unsigned long flags;
220
221 fast_path_evt = lpfc_alloc_fast_evt(phba);
222 if (!fast_path_evt)
223 return;
224
225 fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
226 FC_REG_SCSI_EVENT;
227 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
228 LPFC_EVENT_VARQUEDEPTH;
229
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));
237 }
238
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;
242
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);
248
249 return;
250}
251
5ffc266e
JS		 252/**
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.
257 *
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.
261 **/
262int
263lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
264{
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;
269
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;
274 if (rdata)
275 lpfc_send_sdev_queuedepth_change_event(phba, vport,
276 rdata->pnode, sdev->lun,
277 old_queue_depth,
278 new_queue_depth);
279 return sdev->queue_depth;
280}
281
9bad7671 282/**
3621a710 283 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
9bad7671
JS		 284 * @phba: The Hba for which this call is being executed.
285 *
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.
290 *
291 * This routine should be called with no lock held.
292 **/
92d7f7b0 293void
eaf15d5b 294lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
92d7f7b0
JS		 295{
296 unsigned long flags;
5e9d9b82 297 uint32_t evt_posted;
92d7f7b0
JS		 298
299 spin_lock_irqsave(&phba->hbalock, flags);
300 atomic_inc(&phba->num_rsrc_err);
301 phba->last_rsrc_error_time = jiffies;
302
303 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
304 spin_unlock_irqrestore(&phba->hbalock, flags);
305 return;
306 }
307
308 phba->last_ramp_down_time = jiffies;
309
310 spin_unlock_irqrestore(&phba->hbalock, flags);
311
312 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
5e9d9b82
JS		 313 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
314 if (!evt_posted)
92d7f7b0 315 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
92d7f7b0
JS		 316 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
317
5e9d9b82
JS		 318 if (!evt_posted)
319 lpfc_worker_wake_up(phba);
92d7f7b0
JS		 320 return;
321}
322
9bad7671 323/**
3621a710 324 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
9bad7671
JS		 325 * @phba: The Hba for which this call is being executed.
326 *
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.
331 *
332 * This routine should be called with no lock held.
333 **/
92d7f7b0 334static inline void
3de2a653 335lpfc_rampup_queue_depth(struct lpfc_vport *vport,
a257bf90 336 uint32_t queue_depth)
92d7f7b0
JS		 337{
338 unsigned long flags;
3de2a653 339 struct lpfc_hba *phba = vport->phba;
5e9d9b82 340 uint32_t evt_posted;
92d7f7b0
JS		 341 atomic_inc(&phba->num_cmd_success);
342
a257bf90 343 if (vport->cfg_lun_queue_depth <= queue_depth)
92d7f7b0 344 return;
92d7f7b0 345 spin_lock_irqsave(&phba->hbalock, flags);
5ffc266e
JS		 346 if (time_before(jiffies,
347 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
348 time_before(jiffies,
349 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
92d7f7b0
JS		 350 spin_unlock_irqrestore(&phba->hbalock, flags);
351 return;
352 }
92d7f7b0
JS		 353 phba->last_ramp_up_time = jiffies;
354 spin_unlock_irqrestore(&phba->hbalock, flags);
355
356 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
5e9d9b82
JS		 357 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
358 if (!evt_posted)
92d7f7b0 359 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
92d7f7b0
JS		 360 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
361
5e9d9b82
JS		 362 if (!evt_posted)
363 lpfc_worker_wake_up(phba);
364 return;
92d7f7b0
JS		 365}
366
9bad7671 367/**
3621a710 368 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
9bad7671
JS		 369 * @phba: The Hba for which this call is being executed.
370 *
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.
374 **/
92d7f7b0
JS		 375void
376lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
377{
549e55cd
JS		 378 struct lpfc_vport **vports;
379 struct Scsi_Host *shost;
92d7f7b0 380 struct scsi_device *sdev;
5ffc266e 381 unsigned long new_queue_depth;
92d7f7b0 382 unsigned long num_rsrc_err, num_cmd_success;
549e55cd 383 int i;
92d7f7b0
JS		 384
385 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
386 num_cmd_success = atomic_read(&phba->num_cmd_success);
387
549e55cd
JS		 388 vports = lpfc_create_vport_work_array(phba);
389 if (vports != NULL)
21e9a0a5 390 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
549e55cd
JS		 391 shost = lpfc_shost_from_vport(vports[i]);
392 shost_for_each_device(sdev, shost) {
92d7f7b0 393 new_queue_depth =
549e55cd
JS		 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;
398 else
399 new_queue_depth = sdev->queue_depth -
400 new_queue_depth;
5ffc266e
JS		 401 lpfc_change_queue_depth(sdev, new_queue_depth,
402 SCSI_QDEPTH_DEFAULT);
549e55cd 403 }
92d7f7b0 404 }
09372820 405 lpfc_destroy_vport_work_array(phba, vports);
92d7f7b0
JS		 406 atomic_set(&phba->num_rsrc_err, 0);
407 atomic_set(&phba->num_cmd_success, 0);
408}
409
9bad7671 410/**
3621a710 411 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
9bad7671
JS		 412 * @phba: The Hba for which this call is being executed.
413 *
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.
418 **/
92d7f7b0
JS		 419void
420lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
421{
549e55cd
JS		 422 struct lpfc_vport **vports;
423 struct Scsi_Host *shost;
92d7f7b0 424 struct scsi_device *sdev;
549e55cd
JS		 425 int i;
426
427 vports = lpfc_create_vport_work_array(phba);
428 if (vports != NULL)
21e9a0a5 429 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
549e55cd
JS		 430 shost = lpfc_shost_from_vport(vports[i]);
431 shost_for_each_device(sdev, shost) {
97eab634
JS		 432 if (vports[i]->cfg_lun_queue_depth <=
433 sdev->queue_depth)
434 continue;
5ffc266e
JS		 435 lpfc_change_queue_depth(sdev,
436 sdev->queue_depth+1,
437 SCSI_QDEPTH_RAMP_UP);
549e55cd 438 }
92d7f7b0 439 }
09372820 440 lpfc_destroy_vport_work_array(phba, vports);
92d7f7b0
JS		 441 atomic_set(&phba->num_rsrc_err, 0);
442 atomic_set(&phba->num_cmd_success, 0);
443}
444
a8e497d5 445/**
3621a710 446 * lpfc_scsi_dev_block - set all scsi hosts to block state
a8e497d5
JS		 447 * @phba: Pointer to HBA context object.
448 *
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.
452 **/
453void
454lpfc_scsi_dev_block(struct lpfc_hba *phba)
455{
456 struct lpfc_vport **vports;
457 struct Scsi_Host *shost;
458 struct scsi_device *sdev;
459 struct fc_rport *rport;
460 int i;
461
462 vports = lpfc_create_vport_work_array(phba);
463 if (vports != NULL)
21e9a0a5 464 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
a8e497d5
JS		 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);
469 }
470 }
471 lpfc_destroy_vport_work_array(phba, vports);
472}
473
9bad7671 474/**
3772a991 475 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
9bad7671 476 * @vport: The virtual port for which this call being executed.
3772a991 477 * @num_to_allocate: The requested number of buffers to allocate.
9bad7671 478 *
3772a991
JS		 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.
9bad7671
JS		 485 *
486 * Return codes:
3772a991
JS		 487 * int - number of scsi buffers that were allocated.
488 * 0 = failure, less than num_to_alloc is a partial failure.
9bad7671 489 **/
3772a991
JS		 490static int
491lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
dea3101e 492{
2e0fef85 493 struct lpfc_hba *phba = vport->phba;
dea3101e 494 struct lpfc_scsi_buf *psb;
495 struct ulp_bde64 *bpl;
496 IOCB_t *iocb;
34b02dcd
JS		 497 dma_addr_t pdma_phys_fcp_cmd;
498 dma_addr_t pdma_phys_fcp_rsp;
499 dma_addr_t pdma_phys_bpl;
604a3e30 500 uint16_t iotag;
3772a991 501 int bcnt;
dea3101e 502
3772a991
JS		 503 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
504 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
505 if (!psb)
506 break;
dea3101e 507
3772a991
JS		 508 /*
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.
513 */
514 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
515 GFP_KERNEL, &psb->dma_handle);
516 if (!psb->data) {
517 kfree(psb);
518 break;
519 }
520
521 /* Initialize virtual ptrs to dma_buf region. */
522 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
523
524 /* Allocate iotag for psb->cur_iocbq. */
525 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
526 if (iotag == 0) {
527 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
528 psb->data, psb->dma_handle);
529 kfree(psb);
530 break;
531 }
532 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
533
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) +
34b02dcd 537 sizeof(struct fcp_rsp);
dea3101e 538
3772a991
JS		 539 /* Initialize local short-hand pointers. */
540 bpl = psb->fcp_bpl;
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);
545
546 /*
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.
550 */
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);
556
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);
563
564 /*
565 * Since the IOCB for the FCP I/O is built into this
566 * lpfc_scsi_buf, initialize it with all known data now.
567 */
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,
576 unsli3.fcp_ext.icd);
577 iocb->un.fcpi64.bdl.addrHigh = 0;
578 iocb->ulpBdeCount = 0;
579 iocb->ulpLe = 0;
25985edc 580 /* fill in response BDE */
3772a991
JS		 581 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
582 BUFF_TYPE_BDE_64;
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);
589 } else {
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;
598 iocb->ulpLe = 1;
599 }
600 iocb->ulpClass = CLASS3;
601 psb->status = IOSTAT_SUCCESS;
da0436e9 602 /* Put it back into the SCSI buffer list */
eee8877e 603 psb->cur_iocbq.context1 = psb;
1c6f4ef5 604 lpfc_release_scsi_buf_s3(phba, psb);
dea3101e 605
34b02dcd 606 }
dea3101e 607
3772a991 608 return bcnt;
dea3101e 609}
610
1151e3ec
JS		 611/**
612 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
613 * @vport: pointer to lpfc vport data structure.
614 *
615 * This routine is invoked by the vport cleanup for deletions and the cleanup
616 * for an ndlp on removal.
617 **/
618void
619lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
620{
621 struct lpfc_hba *phba = vport->phba;
622 struct lpfc_scsi_buf *psb, *next_psb;
623 unsigned long iflag = 0;
624
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)
631 psb->rdata = NULL;
632 }
633 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
634 spin_unlock_irqrestore(&phba->hbalock, iflag);
635}
636
da0436e9
JS		 637/**
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.
641 *
642 * This routine is invoked by the worker thread to process a SLI4 fast-path
643 * FCP aborted xri.
644 **/
645void
646lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
647 struct sli4_wcqe_xri_aborted *axri)
648{
649 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
19ca7609 650 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
da0436e9
JS		 651 struct lpfc_scsi_buf *psb, *next_psb;
652 unsigned long iflag = 0;
0f65ff68
JS		 653 struct lpfc_iocbq *iocbq;
654 int i;
19ca7609
JS		 655 struct lpfc_nodelist *ndlp;
656 int rrq_empty = 0;
589a52d6 657 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
da0436e9 658
0f65ff68
JS		 659 spin_lock_irqsave(&phba->hbalock, iflag);
660 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
da0436e9
JS		 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);
341af102 665 psb->exch_busy = 0;
da0436e9 666 psb->status = IOSTAT_SUCCESS;
0f65ff68
JS		 667 spin_unlock(
668 &phba->sli4_hba.abts_scsi_buf_list_lock);
1151e3ec
JS		 669 if (psb->rdata && psb->rdata->pnode)
670 ndlp = psb->rdata->pnode;
671 else
672 ndlp = NULL;
673
19ca7609 674 rrq_empty = list_empty(&phba->active_rrq_list);
0f65ff68 675 spin_unlock_irqrestore(&phba->hbalock, iflag);
19ca7609
JS		 676 if (ndlp)
677 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1);
da0436e9 678 lpfc_release_scsi_buf_s4(phba, psb);
19ca7609
JS		 679 if (rrq_empty)
680 lpfc_worker_wake_up(phba);
da0436e9
JS		 681 return;
682 }
683 }
0f65ff68
JS		 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];
687
688 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
689 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
690 continue;
691 if (iocbq->sli4_xritag != xri)
692 continue;
693 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
694 psb->exch_busy = 0;
695 spin_unlock_irqrestore(&phba->hbalock, iflag);
589a52d6
JS		 696 if (pring->txq_cnt)
697 lpfc_worker_wake_up(phba);
0f65ff68
JS		 698 return;
699
700 }
701 spin_unlock_irqrestore(&phba->hbalock, iflag);
da0436e9
JS		 702}
703
704/**
705 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
706 * @phba: pointer to lpfc hba data structure.
707 *
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.
713 *
714 * Returns: 0 = success, non-zero failure.
715 **/
716int
717lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
718{
719 struct lpfc_scsi_buf *psb;
720 int index, status, bcnt = 0, rcnt = 0, rc = 0;
721 LIST_HEAD(sblist);
722
723 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
724 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
725 if (psb) {
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) {
731 bcnt = rcnt;
732 rcnt = 0;
733 }
734 } else
735 /* A hole present in the XRI array, need to skip */
736 bcnt = rcnt;
737
738 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
739 /* End of XRI array for SCSI buffer, complete */
740 bcnt = rcnt;
741
742 /* Continue until collect up to a nembed page worth of sgls */
743 if (bcnt == 0)
744 continue;
745 /* Now, post the SCSI buffer list sgls as a block */
6d368e53
JS		 746 if (!phba->sli4_hba.extents_in_use)
747 status = lpfc_sli4_post_scsi_sgl_block(phba,
748 &sblist,
749 bcnt);
750 else
751 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
752 &sblist,
753 bcnt);
da0436e9
JS		 754 /* Reset SCSI buffer count for next round of posting */
755 bcnt = 0;
756 while (!list_empty(&sblist)) {
757 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
758 list);
759 if (status) {
760 /* Put this back on the abort scsi list */
341af102 761 psb->exch_busy = 1;
da0436e9 762 rc++;
341af102
JS		 763 } else {
764 psb->exch_busy = 0;
da0436e9 765 psb->status = IOSTAT_SUCCESS;
341af102 766 }
da0436e9
JS		 767 /* Put it back into the SCSI buffer list */
768 lpfc_release_scsi_buf_s4(phba, psb);
769 }
770 }
771 return rc;
772}
773
774/**
775 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
776 * @vport: The virtual port for which this call being executed.
777 * @num_to_allocate: The requested number of buffers to allocate.
778 *
779 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
780 * the scsi buffer contains all the necessary information needed to initiate
781 * a SCSI I/O.
782 *
783 * Return codes:
784 * int - number of scsi buffers that were allocated.
785 * 0 = failure, less than num_to_alloc is a partial failure.
786 **/
787static int
788lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
789{
790 struct lpfc_hba *phba = vport->phba;
791 struct lpfc_scsi_buf *psb;
792 struct sli4_sge *sgl;
793 IOCB_t *iocb;
794 dma_addr_t pdma_phys_fcp_cmd;
795 dma_addr_t pdma_phys_fcp_rsp;
796 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
6d368e53 797 uint16_t iotag, last_xritag = NO_XRI, lxri = 0;
da0436e9
JS		 798 int status = 0, index;
799 int bcnt;
800 int non_sequential_xri = 0;
da0436e9
JS		 801 LIST_HEAD(sblist);
802
803 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
804 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
805 if (!psb)
806 break;
807
808 /*
809 * Get memory from the pci pool to map the virt space to pci bus
810 * space for an I/O. The DMA buffer includes space for the
811 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
812 * necessary to support the sg_tablesize.
813 */
814 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
815 GFP_KERNEL, &psb->dma_handle);
816 if (!psb->data) {
817 kfree(psb);
818 break;
819 }
820
821 /* Initialize virtual ptrs to dma_buf region. */
822 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
823
824 /* Allocate iotag for psb->cur_iocbq. */
825 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
826 if (iotag == 0) {
b92938b4
JS		 827 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
828 psb->data, psb->dma_handle);
da0436e9
JS		 829 kfree(psb);
830 break;
831 }
832
6d368e53
JS		 833 lxri = lpfc_sli4_next_xritag(phba);
834 if (lxri == NO_XRI) {
da0436e9
JS		 835 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
836 psb->data, psb->dma_handle);
837 kfree(psb);
838 break;
839 }
6d368e53
JS		 840 psb->cur_iocbq.sli4_lxritag = lxri;
841 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
da0436e9
JS		 842 if (last_xritag != NO_XRI
843 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
844 non_sequential_xri = 1;
845 } else
846 list_add_tail(&psb->list, &sblist);
847 last_xritag = psb->cur_iocbq.sli4_xritag;
848
849 index = phba->sli4_hba.scsi_xri_cnt++;
850 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
851
852 psb->fcp_bpl = psb->data;
853 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
854 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
855 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
856 sizeof(struct fcp_cmnd));
857
858 /* Initialize local short-hand pointers. */
859 sgl = (struct sli4_sge *)psb->fcp_bpl;
860 pdma_phys_bpl = psb->dma_handle;
861 pdma_phys_fcp_cmd =
862 (psb->dma_handle + phba->cfg_sg_dma_buf_size)
863 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
864 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
865
866 /*
867 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
868 * are sg list bdes. Initialize the first two and leave the
869 * rest for queuecommand.
870 */
871 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
872 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
0558056c 873 sgl->word2 = le32_to_cpu(sgl->word2);
da0436e9
JS		 874 bf_set(lpfc_sli4_sge_last, sgl, 0);
875 sgl->word2 = cpu_to_le32(sgl->word2);
28baac74 876 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
da0436e9
JS		 877 sgl++;
878
879 /* Setup the physical region for the FCP RSP */
880 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
881 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
0558056c 882 sgl->word2 = le32_to_cpu(sgl->word2);
da0436e9
JS		 883 bf_set(lpfc_sli4_sge_last, sgl, 1);
884 sgl->word2 = cpu_to_le32(sgl->word2);
28baac74 885 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
da0436e9
JS		 886
887 /*
888 * Since the IOCB for the FCP I/O is built into this
889 * lpfc_scsi_buf, initialize it with all known data now.
890 */
891 iocb = &psb->cur_iocbq.iocb;
892 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
893 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
894 /* setting the BLP size to 2 * sizeof BDE may not be correct.
895 * We are setting the bpl to point to out sgl. An sgl's
896 * entries are 16 bytes, a bpl entries are 12 bytes.
897 */
898 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
899 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
900 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
901 iocb->ulpBdeCount = 1;
902 iocb->ulpLe = 1;
903 iocb->ulpClass = CLASS3;
eee8877e 904 psb->cur_iocbq.context1 = psb;
da0436e9
JS		 905 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
906 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
907 else
908 pdma_phys_bpl1 = 0;
909 psb->dma_phys_bpl = pdma_phys_bpl;
910 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
911 if (non_sequential_xri) {
912 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
913 pdma_phys_bpl1,
914 psb->cur_iocbq.sli4_xritag);
915 if (status) {
916 /* Put this back on the abort scsi list */
341af102 917 psb->exch_busy = 1;
341af102
JS		 918 } else {
919 psb->exch_busy = 0;
da0436e9 920 psb->status = IOSTAT_SUCCESS;
341af102 921 }
da0436e9
JS		 922 /* Put it back into the SCSI buffer list */
923 lpfc_release_scsi_buf_s4(phba, psb);
924 break;
925 }
926 }
927 if (bcnt) {
6d368e53
JS		 928 if (!phba->sli4_hba.extents_in_use)
929 status = lpfc_sli4_post_scsi_sgl_block(phba,
930 &sblist,
931 bcnt);
932 else
933 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
934 &sblist,
935 bcnt);
936
937 if (status) {
938 lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
939 "3021 SCSI SGL post error %d\n",
940 status);
941 bcnt = 0;
942 }
da0436e9
JS		 943 /* Reset SCSI buffer count for next round of posting */
944 while (!list_empty(&sblist)) {
945 list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
946 list);
947 if (status) {
948 /* Put this back on the abort scsi list */
341af102 949 psb->exch_busy = 1;
341af102
JS		 950 } else {
951 psb->exch_busy = 0;
da0436e9 952 psb->status = IOSTAT_SUCCESS;
341af102 953 }
da0436e9
JS		 954 /* Put it back into the SCSI buffer list */
955 lpfc_release_scsi_buf_s4(phba, psb);
956 }
957 }
958
d7c47992 959 return bcnt + non_sequential_xri;
da0436e9
JS		 960}
961
9bad7671 962/**
3772a991
JS		 963 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
964 * @vport: The virtual port for which this call being executed.
965 * @num_to_allocate: The requested number of buffers to allocate.
966 *
967 * This routine wraps the actual SCSI buffer allocator function pointer from
968 * the lpfc_hba struct.
969 *
970 * Return codes:
971 * int - number of scsi buffers that were allocated.
972 * 0 = failure, less than num_to_alloc is a partial failure.
973 **/
974static inline int
975lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
976{
977 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
978}
979
980/**
19ca7609 981 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
3772a991 982 * @phba: The HBA for which this call is being executed.
9bad7671
JS		 983 *
984 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
985 * and returns to caller.
986 *
987 * Return codes:
988 * NULL - Error
989 * Pointer to lpfc_scsi_buf - Success
990 **/
455c53ec 991static struct lpfc_scsi_buf*
19ca7609 992lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
dea3101e 993{
0bd4ca25
JSEC		 994 struct lpfc_scsi_buf * lpfc_cmd = NULL;
995 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
875fbdfe 996 unsigned long iflag = 0;
0bd4ca25 997
875fbdfe 998 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
0bd4ca25 999 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1dcb58e5
JS		 1000 if (lpfc_cmd) {
1001 lpfc_cmd->seg_cnt = 0;
1002 lpfc_cmd->nonsg_phys = 0;
e2a0a9d6 1003 lpfc_cmd->prot_seg_cnt = 0;
1dcb58e5 1004 }
875fbdfe 1005 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
0bd4ca25
JSEC		 1006 return lpfc_cmd;
1007}
19ca7609
JS		 1008/**
1009 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1010 * @phba: The HBA for which this call is being executed.
1011 *
1012 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1013 * and returns to caller.
1014 *
1015 * Return codes:
1016 * NULL - Error
1017 * Pointer to lpfc_scsi_buf - Success
1018 **/
1019static struct lpfc_scsi_buf*
1020lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1021{
1151e3ec 1022 struct lpfc_scsi_buf *lpfc_cmd ;
19ca7609
JS		 1023 unsigned long iflag = 0;
1024 int found = 0;
1025
1026 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1151e3ec
JS		 1027 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,
1028 list) {
19ca7609 1029 if (lpfc_test_rrq_active(phba, ndlp,
1151e3ec
JS		 1030 lpfc_cmd->cur_iocbq.sli4_xritag))
1031 continue;
1032 list_del(&lpfc_cmd->list);
19ca7609
JS		 1033 found = 1;
1034 lpfc_cmd->seg_cnt = 0;
1035 lpfc_cmd->nonsg_phys = 0;
1036 lpfc_cmd->prot_seg_cnt = 0;
1151e3ec 1037 break;
19ca7609 1038 }
1151e3ec
JS		 1039 spin_unlock_irqrestore(&phba->scsi_buf_list_lock,
1040 iflag);
1041 if (!found)
1042 return NULL;
1043 else
1044 return lpfc_cmd;
19ca7609
JS		 1045}
1046/**
1047 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1048 * @phba: The HBA for which this call is being executed.
1049 *
1050 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1051 * and returns to caller.
1052 *
1053 * Return codes:
1054 * NULL - Error
1055 * Pointer to lpfc_scsi_buf - Success
1056 **/
1057static struct lpfc_scsi_buf*
1058lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1059{
1060 return phba->lpfc_get_scsi_buf(phba, ndlp);
1061}
dea3101e 1062
9bad7671 1063/**
3772a991 1064 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
9bad7671
JS		 1065 * @phba: The Hba for which this call is being executed.
1066 * @psb: The scsi buffer which is being released.
1067 *
1068 * This routine releases @psb scsi buffer by adding it to tail of @phba
1069 * lpfc_scsi_buf_list list.
1070 **/
0bd4ca25 1071static void
3772a991 1072lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
0bd4ca25 1073{
875fbdfe 1074 unsigned long iflag = 0;
dea3101e 1075
875fbdfe 1076 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
0bd4ca25 1077 psb->pCmd = NULL;
dea3101e 1078 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
875fbdfe 1079 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
dea3101e 1080}
1081
da0436e9
JS		 1082/**
1083 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1084 * @phba: The Hba for which this call is being executed.
1085 * @psb: The scsi buffer which is being released.
1086 *
1087 * This routine releases @psb scsi buffer by adding it to tail of @phba
1088 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1089 * and cannot be reused for at least RA_TOV amount of time if it was
1090 * aborted.
1091 **/
1092static void
1093lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1094{
1095 unsigned long iflag = 0;
1096
341af102 1097 if (psb->exch_busy) {
da0436e9
JS		 1098 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1099 iflag);
1100 psb->pCmd = NULL;
1101 list_add_tail(&psb->list,
1102 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1103 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1104 iflag);
1105 } else {
1106
1107 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1108 psb->pCmd = NULL;
1109 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1110 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1111 }
1112}
1113
9bad7671 1114/**
3772a991
JS		 1115 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1116 * @phba: The Hba for which this call is being executed.
1117 * @psb: The scsi buffer which is being released.
1118 *
1119 * This routine releases @psb scsi buffer by adding it to tail of @phba
1120 * lpfc_scsi_buf_list list.
1121 **/
1122static void
1123lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1124{
1125
1126 phba->lpfc_release_scsi_buf(phba, psb);
1127}
1128
1129/**
1130 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
9bad7671
JS		 1131 * @phba: The Hba for which this call is being executed.
1132 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1133 *
1134 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3772a991
JS		 1135 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1136 * through sg elements and format the bdea. This routine also initializes all
1137 * IOCB fields which are dependent on scsi command request buffer.
9bad7671
JS		 1138 *
1139 * Return codes:
1140 * 1 - Error
1141 * 0 - Success
1142 **/
dea3101e 1143static int
3772a991 1144lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
dea3101e 1145{
1146 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1147 struct scatterlist *sgel = NULL;
1148 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1149 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
0f65ff68 1150 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
dea3101e 1151 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
34b02dcd 1152 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
dea3101e 1153 dma_addr_t physaddr;
34b02dcd 1154 uint32_t num_bde = 0;
a0b4f78f 1155 int nseg, datadir = scsi_cmnd->sc_data_direction;
dea3101e 1156
1157 /*
1158 * There are three possibilities here - use scatter-gather segment, use
1159 * the single mapping, or neither. Start the lpfc command prep by
1160 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1161 * data bde entry.
1162 */
1163 bpl += 2;
c59fd9eb 1164 if (scsi_sg_count(scsi_cmnd)) {
dea3101e 1165 /*
1166 * The driver stores the segment count returned from pci_map_sg
1167 * because this a count of dma-mappings used to map the use_sg
1168 * pages. They are not guaranteed to be the same for those
1169 * architectures that implement an IOMMU.
1170 */
dea3101e 1171
c59fd9eb
FT		 1172 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1173 scsi_sg_count(scsi_cmnd), datadir);
1174 if (unlikely(!nseg))
1175 return 1;
1176
a0b4f78f 1177 lpfc_cmd->seg_cnt = nseg;
dea3101e 1178 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
6a9c52cf
JS		 1179 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1180 "9064 BLKGRD: %s: Too many sg segments from "
e2a0a9d6 1181 "dma_map_sg. Config %d, seg_cnt %d\n",
cadbd4a5 1182 __func__, phba->cfg_sg_seg_cnt,
dea3101e 1183 lpfc_cmd->seg_cnt);
a0b4f78f 1184 scsi_dma_unmap(scsi_cmnd);
dea3101e 1185 return 1;
1186 }
1187
1188 /*
1189 * The driver established a maximum scatter-gather segment count
1190 * during probe that limits the number of sg elements in any
1191 * single scsi command. Just run through the seg_cnt and format
1192 * the bde's.
34b02dcd
JS		 1193 * When using SLI-3 the driver will try to fit all the BDEs into
1194 * the IOCB. If it can't then the BDEs get added to a BPL as it
1195 * does for SLI-2 mode.
dea3101e 1196 */
34b02dcd 1197 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
dea3101e 1198 physaddr = sg_dma_address(sgel);
34b02dcd 1199 if (phba->sli_rev == 3 &&
e2a0a9d6 1200 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
0f65ff68 1201 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
34b02dcd
JS		 1202 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1203 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1204 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1205 data_bde->addrLow = putPaddrLow(physaddr);
1206 data_bde->addrHigh = putPaddrHigh(physaddr);
1207 data_bde++;
1208 } else {
1209 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1210 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1211 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1212 bpl->addrLow =
1213 le32_to_cpu(putPaddrLow(physaddr));
1214 bpl->addrHigh =
1215 le32_to_cpu(putPaddrHigh(physaddr));
1216 bpl++;
1217 }
dea3101e 1218 }
c59fd9eb 1219 }
dea3101e 1220
1221 /*
1222 * Finish initializing those IOCB fields that are dependent on the
34b02dcd
JS		 1223 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1224 * explicitly reinitialized and for SLI-3 the extended bde count is
1225 * explicitly reinitialized since all iocb memory resources are reused.
dea3101e 1226 */
e2a0a9d6 1227 if (phba->sli_rev == 3 &&
0f65ff68
JS		 1228 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1229 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
34b02dcd
JS		 1230 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1231 /*
1232 * The extended IOCB format can only fit 3 BDE or a BPL.
1233 * This I/O has more than 3 BDE so the 1st data bde will
1234 * be a BPL that is filled in here.
1235 */
1236 physaddr = lpfc_cmd->dma_handle;
1237 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1238 data_bde->tus.f.bdeSize = (num_bde *
1239 sizeof(struct ulp_bde64));
1240 physaddr += (sizeof(struct fcp_cmnd) +
1241 sizeof(struct fcp_rsp) +
1242 (2 * sizeof(struct ulp_bde64)));
1243 data_bde->addrHigh = putPaddrHigh(physaddr);
1244 data_bde->addrLow = putPaddrLow(physaddr);
25985edc 1245 /* ebde count includes the response bde and data bpl */
34b02dcd
JS		 1246 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1247 } else {
25985edc 1248 /* ebde count includes the response bde and data bdes */
34b02dcd
JS		 1249 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1250 }
1251 } else {
1252 iocb_cmd->un.fcpi64.bdl.bdeSize =
1253 ((num_bde + 2) * sizeof(struct ulp_bde64));
0f65ff68 1254 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
34b02dcd 1255 }
09372820 1256 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
e2a0a9d6
JS		 1257
1258 /*
1259 * Due to difference in data length between DIF/non-DIF paths,
1260 * we need to set word 4 of IOCB here
1261 */
a257bf90 1262 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
e2a0a9d6
JS		 1263 return 0;
1264}
1265
1266/*
6c8eea54
JS		 1267 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1268 * @sc: The SCSI command to examine
1269 * @txopt: (out) BlockGuard operation for transmitted data
1270 * @rxopt: (out) BlockGuard operation for received data
1271 *
1272 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1273 *
e2a0a9d6
JS		 1274 */
1275static int
6c8eea54
JS		 1276lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1277 uint8_t *txop, uint8_t *rxop)
e2a0a9d6
JS		 1278{
1279 uint8_t guard_type = scsi_host_get_guard(sc->device->host);
6c8eea54 1280 uint8_t ret = 0;
e2a0a9d6
JS		 1281
1282 if (guard_type == SHOST_DIX_GUARD_IP) {
1283 switch (scsi_get_prot_op(sc)) {
1284 case SCSI_PROT_READ_INSERT:
1285 case SCSI_PROT_WRITE_STRIP:
6c8eea54
JS		 1286 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1287 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
e2a0a9d6
JS		 1288 break;
1289
1290 case SCSI_PROT_READ_STRIP:
1291 case SCSI_PROT_WRITE_INSERT:
6c8eea54
JS		 1292 *txop = BG_OP_IN_NODIF_OUT_CRC;
1293 *rxop = BG_OP_IN_CRC_OUT_NODIF;
e2a0a9d6
JS		 1294 break;
1295
c6af4042
MP		 1296 case SCSI_PROT_READ_PASS:
1297 case SCSI_PROT_WRITE_PASS:
6c8eea54
JS		 1298 *txop = BG_OP_IN_CSUM_OUT_CRC;
1299 *rxop = BG_OP_IN_CRC_OUT_CSUM;
e2a0a9d6
JS		 1300 break;
1301
e2a0a9d6
JS		 1302 case SCSI_PROT_NORMAL:
1303 default:
6a9c52cf 1304 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
7c56b9fd
JS		 1305 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1306 scsi_get_prot_op(sc));
6c8eea54 1307 ret = 1;
e2a0a9d6
JS		 1308 break;
1309
1310 }
7c56b9fd 1311 } else {
e2a0a9d6
JS		 1312 switch (scsi_get_prot_op(sc)) {
1313 case SCSI_PROT_READ_STRIP:
1314 case SCSI_PROT_WRITE_INSERT:
6c8eea54
JS		 1315 *txop = BG_OP_IN_NODIF_OUT_CRC;
1316 *rxop = BG_OP_IN_CRC_OUT_NODIF;
e2a0a9d6
JS		 1317 break;
1318
1319 case SCSI_PROT_READ_PASS:
1320 case SCSI_PROT_WRITE_PASS:
6c8eea54
JS		 1321 *txop = BG_OP_IN_CRC_OUT_CRC;
1322 *rxop = BG_OP_IN_CRC_OUT_CRC;
e2a0a9d6
JS		 1323 break;
1324
e2a0a9d6
JS		 1325 case SCSI_PROT_READ_INSERT:
1326 case SCSI_PROT_WRITE_STRIP:
7c56b9fd
JS		 1327 *txop = BG_OP_IN_CRC_OUT_NODIF;
1328 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1329 break;
1330
e2a0a9d6
JS		 1331 case SCSI_PROT_NORMAL:
1332 default:
6a9c52cf 1333 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
7c56b9fd
JS		 1334 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1335 scsi_get_prot_op(sc));
6c8eea54 1336 ret = 1;
e2a0a9d6
JS		 1337 break;
1338 }
e2a0a9d6
JS		 1339 }
1340
6c8eea54 1341 return ret;
e2a0a9d6
JS		 1342}
1343
1344struct scsi_dif_tuple {
1345 __be16 guard_tag; /* Checksum */
1346 __be16 app_tag; /* Opaque storage */
1347 __be32 ref_tag; /* Target LBA or indirect LBA */
1348};
1349
1350static inline unsigned
1351lpfc_cmd_blksize(struct scsi_cmnd *sc)
1352{
1353 return sc->device->sector_size;
1354}
1355
e2a0a9d6
JS		 1356/*
1357 * This function sets up buffer list for protection groups of
1358 * type LPFC_PG_TYPE_NO_DIF
1359 *
1360 * This is usually used when the HBA is instructed to generate
1361 * DIFs and insert them into data stream (or strip DIF from
1362 * incoming data stream)
1363 *
1364 * The buffer list consists of just one protection group described
1365 * below:
1366 * +-------------------------+
6c8eea54
JS		 1367 * start of prot group --> | PDE_5 |
1368 * +-------------------------+
1369 * | PDE_6 |
e2a0a9d6
JS		 1370 * +-------------------------+
1371 * | Data BDE |
1372 * +-------------------------+
1373 * |more Data BDE's ... (opt)|
1374 * +-------------------------+
1375 *
1376 * @sc: pointer to scsi command we're working on
1377 * @bpl: pointer to buffer list for protection groups
1378 * @datacnt: number of segments of data that have been dma mapped
1379 *
1380 * Note: Data s/g buffers have been dma mapped
1381 */
1382static int
1383lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1384 struct ulp_bde64 *bpl, int datasegcnt)
1385{
1386 struct scatterlist *sgde = NULL; /* s/g data entry */
6c8eea54
JS		 1387 struct lpfc_pde5 *pde5 = NULL;
1388 struct lpfc_pde6 *pde6 = NULL;
e2a0a9d6 1389 dma_addr_t physaddr;
6c8eea54 1390 int i = 0, num_bde = 0, status;
e2a0a9d6 1391 int datadir = sc->sc_data_direction;
e2a0a9d6 1392 uint32_t reftag;
7c56b9fd 1393 unsigned blksize;
6c8eea54 1394 uint8_t txop, rxop;
e2a0a9d6 1395
6c8eea54
JS		 1396 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1397 if (status)
e2a0a9d6
JS		 1398 goto out;
1399
6c8eea54 1400 /* extract some info from the scsi command for pde*/
e2a0a9d6 1401 blksize = lpfc_cmd_blksize(sc);
7c56b9fd 1402 reftag = scsi_get_lba(sc) & 0xffffffff;
e2a0a9d6 1403
6c8eea54
JS		 1404 /* setup PDE5 with what we have */
1405 pde5 = (struct lpfc_pde5 *) bpl;
1406 memset(pde5, 0, sizeof(struct lpfc_pde5));
1407 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
6c8eea54 1408
bc73905a 1409 /* Endianness conversion if necessary for PDE5 */
589a52d6 1410 pde5->word0 = cpu_to_le32(pde5->word0);
7c56b9fd 1411 pde5->reftag = cpu_to_le32(reftag);
589a52d6 1412
6c8eea54
JS		 1413 /* advance bpl and increment bde count */
1414 num_bde++;
1415 bpl++;
1416 pde6 = (struct lpfc_pde6 *) bpl;
1417
1418 /* setup PDE6 with the rest of the info */
1419 memset(pde6, 0, sizeof(struct lpfc_pde6));
1420 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1421 bf_set(pde6_optx, pde6, txop);
1422 bf_set(pde6_oprx, pde6, rxop);
1423 if (datadir == DMA_FROM_DEVICE) {
1424 bf_set(pde6_ce, pde6, 1);
1425 bf_set(pde6_re, pde6, 1);
6c8eea54
JS		 1426 }
1427 bf_set(pde6_ai, pde6, 1);
7c56b9fd
JS		 1428 bf_set(pde6_ae, pde6, 0);
1429 bf_set(pde6_apptagval, pde6, 0);
e2a0a9d6 1430
bc73905a 1431 /* Endianness conversion if necessary for PDE6 */
589a52d6
JS		 1432 pde6->word0 = cpu_to_le32(pde6->word0);
1433 pde6->word1 = cpu_to_le32(pde6->word1);
1434 pde6->word2 = cpu_to_le32(pde6->word2);
1435
6c8eea54 1436 /* advance bpl and increment bde count */
e2a0a9d6
JS		 1437 num_bde++;
1438 bpl++;
1439
1440 /* assumption: caller has already run dma_map_sg on command data */
1441 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1442 physaddr = sg_dma_address(sgde);
1443 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1444 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1445 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1446 if (datadir == DMA_TO_DEVICE)
1447 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1448 else
1449 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1450 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1451 bpl++;
1452 num_bde++;
1453 }
1454
1455out:
1456 return num_bde;
1457}
1458
1459/*
1460 * This function sets up buffer list for protection groups of
1461 * type LPFC_PG_TYPE_DIF_BUF
1462 *
1463 * This is usually used when DIFs are in their own buffers,
1464 * separate from the data. The HBA can then by instructed
1465 * to place the DIFs in the outgoing stream. For read operations,
1466 * The HBA could extract the DIFs and place it in DIF buffers.
1467 *
1468 * The buffer list for this type consists of one or more of the
1469 * protection groups described below:
1470 * +-------------------------+
6c8eea54 1471 * start of first prot group --> | PDE_5 |
e2a0a9d6 1472 * +-------------------------+
6c8eea54
JS		 1473 * | PDE_6 |
1474 * +-------------------------+
1475 * | PDE_7 (Prot BDE) |
e2a0a9d6
JS		 1476 * +-------------------------+
1477 * | Data BDE |
1478 * +-------------------------+
1479 * |more Data BDE's ... (opt)|
1480 * +-------------------------+
6c8eea54 1481 * start of new prot group --> | PDE_5 |
e2a0a9d6
JS		 1482 * +-------------------------+
1483 * | ... |
1484 * +-------------------------+
1485 *
1486 * @sc: pointer to scsi command we're working on
1487 * @bpl: pointer to buffer list for protection groups
1488 * @datacnt: number of segments of data that have been dma mapped
1489 * @protcnt: number of segment of protection data that have been dma mapped
1490 *
1491 * Note: It is assumed that both data and protection s/g buffers have been
1492 * mapped for DMA
1493 */
1494static int
1495lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1496 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1497{
1498 struct scatterlist *sgde = NULL; /* s/g data entry */
1499 struct scatterlist *sgpe = NULL; /* s/g prot entry */
6c8eea54
JS		 1500 struct lpfc_pde5 *pde5 = NULL;
1501 struct lpfc_pde6 *pde6 = NULL;
7f86059a 1502 struct lpfc_pde7 *pde7 = NULL;
e2a0a9d6
JS		 1503 dma_addr_t dataphysaddr, protphysaddr;
1504 unsigned short curr_data = 0, curr_prot = 0;
7f86059a
JS		 1505 unsigned int split_offset;
1506 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
e2a0a9d6
JS		 1507 unsigned int protgrp_blks, protgrp_bytes;
1508 unsigned int remainder, subtotal;
6c8eea54 1509 int status;
e2a0a9d6
JS		 1510 int datadir = sc->sc_data_direction;
1511 unsigned char pgdone = 0, alldone = 0;
1512 unsigned blksize;
1513 uint32_t reftag;
6c8eea54 1514 uint8_t txop, rxop;
e2a0a9d6
JS		 1515 int num_bde = 0;
1516
1517 sgpe = scsi_prot_sglist(sc);
1518 sgde = scsi_sglist(sc);
1519
1520 if (!sgpe || !sgde) {
1521 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1522 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1523 sgpe, sgde);
1524 return 0;
1525 }
1526
6c8eea54
JS		 1527 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1528 if (status)
e2a0a9d6
JS		 1529 goto out;
1530
6c8eea54 1531 /* extract some info from the scsi command */
e2a0a9d6 1532 blksize = lpfc_cmd_blksize(sc);
7c56b9fd 1533 reftag = scsi_get_lba(sc) & 0xffffffff;
e2a0a9d6
JS		 1534
1535 split_offset = 0;
1536 do {
6c8eea54
JS		 1537 /* setup PDE5 with what we have */
1538 pde5 = (struct lpfc_pde5 *) bpl;
1539 memset(pde5, 0, sizeof(struct lpfc_pde5));
1540 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
e2a0a9d6 1541
bc73905a 1542 /* Endianness conversion if necessary for PDE5 */
589a52d6 1543 pde5->word0 = cpu_to_le32(pde5->word0);
7c56b9fd 1544 pde5->reftag = cpu_to_le32(reftag);
589a52d6 1545
6c8eea54
JS		 1546 /* advance bpl and increment bde count */
1547 num_bde++;
1548 bpl++;
1549 pde6 = (struct lpfc_pde6 *) bpl;
1550
1551 /* setup PDE6 with the rest of the info */
1552 memset(pde6, 0, sizeof(struct lpfc_pde6));
1553 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1554 bf_set(pde6_optx, pde6, txop);
1555 bf_set(pde6_oprx, pde6, rxop);
1556 bf_set(pde6_ce, pde6, 1);
1557 bf_set(pde6_re, pde6, 1);
6c8eea54 1558 bf_set(pde6_ai, pde6, 1);
7c56b9fd
JS		 1559 bf_set(pde6_ae, pde6, 0);
1560 bf_set(pde6_apptagval, pde6, 0);
6c8eea54 1561
bc73905a 1562 /* Endianness conversion if necessary for PDE6 */
589a52d6
JS		 1563 pde6->word0 = cpu_to_le32(pde6->word0);
1564 pde6->word1 = cpu_to_le32(pde6->word1);
1565 pde6->word2 = cpu_to_le32(pde6->word2);
1566
6c8eea54 1567 /* advance bpl and increment bde count */
e2a0a9d6
JS		 1568 num_bde++;
1569 bpl++;
1570
1571 /* setup the first BDE that points to protection buffer */
7f86059a
JS		 1572 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1573 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
e2a0a9d6 1574
e2a0a9d6
JS		 1575 /* must be integer multiple of the DIF block length */
1576 BUG_ON(protgroup_len % 8);
1577
7f86059a
JS		 1578 pde7 = (struct lpfc_pde7 *) bpl;
1579 memset(pde7, 0, sizeof(struct lpfc_pde7));
1580 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1581
7c56b9fd
JS		 1582 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
1583 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
7f86059a 1584
e2a0a9d6
JS		 1585 protgrp_blks = protgroup_len / 8;
1586 protgrp_bytes = protgrp_blks * blksize;
1587
7f86059a
JS		 1588 /* check if this pde is crossing the 4K boundary; if so split */
1589 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1590 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1591 protgroup_offset += protgroup_remainder;
1592 protgrp_blks = protgroup_remainder / 8;
7c56b9fd 1593 protgrp_bytes = protgrp_blks * blksize;
7f86059a
JS		 1594 } else {
1595 protgroup_offset = 0;
1596 curr_prot++;
1597 }
e2a0a9d6 1598
e2a0a9d6
JS		 1599 num_bde++;
1600
1601 /* setup BDE's for data blocks associated with DIF data */
1602 pgdone = 0;
1603 subtotal = 0; /* total bytes processed for current prot grp */
1604 while (!pgdone) {
1605 if (!sgde) {
6a9c52cf
JS		 1606 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1607 "9065 BLKGRD:%s Invalid data segment\n",
e2a0a9d6
JS		 1608 __func__);
1609 return 0;
1610 }
1611 bpl++;
1612 dataphysaddr = sg_dma_address(sgde) + split_offset;
1613 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1614 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1615
1616 remainder = sg_dma_len(sgde) - split_offset;
1617
1618 if ((subtotal + remainder) <= protgrp_bytes) {
1619 /* we can use this whole buffer */
1620 bpl->tus.f.bdeSize = remainder;
1621 split_offset = 0;
1622
1623 if ((subtotal + remainder) == protgrp_bytes)
1624 pgdone = 1;
1625 } else {
1626 /* must split this buffer with next prot grp */
1627 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1628 split_offset += bpl->tus.f.bdeSize;
1629 }
1630
1631 subtotal += bpl->tus.f.bdeSize;
1632
1633 if (datadir == DMA_TO_DEVICE)
1634 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1635 else
1636 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1637 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1638
1639 num_bde++;
1640 curr_data++;
1641
1642 if (split_offset)
1643 break;
1644
1645 /* Move to the next s/g segment if possible */
1646 sgde = sg_next(sgde);
6c8eea54 1647
e2a0a9d6
JS		 1648 }
1649
7f86059a
JS		 1650 if (protgroup_offset) {
1651 /* update the reference tag */
1652 reftag += protgrp_blks;
1653 bpl++;
1654 continue;
1655 }
1656
e2a0a9d6
JS		 1657 /* are we done ? */
1658 if (curr_prot == protcnt) {
1659 alldone = 1;
1660 } else if (curr_prot < protcnt) {
1661 /* advance to next prot buffer */
1662 sgpe = sg_next(sgpe);
1663 bpl++;
1664
1665 /* update the reference tag */
1666 reftag += protgrp_blks;
1667 } else {
1668 /* if we're here, we have a bug */
6a9c52cf
JS		 1669 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1670 "9054 BLKGRD: bug in %s\n", __func__);
e2a0a9d6
JS		 1671 }
1672
1673 } while (!alldone);
1674
1675out:
1676
e2a0a9d6
JS		 1677 return num_bde;
1678}
7f86059a 1679
e2a0a9d6
JS		 1680/*
1681 * Given a SCSI command that supports DIF, determine composition of protection
1682 * groups involved in setting up buffer lists
1683 *
1684 * Returns:
1685 * for DIF (for both read and write)
1686 * */
1687static int
1688lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1689{
1690 int ret = LPFC_PG_TYPE_INVALID;
1691 unsigned char op = scsi_get_prot_op(sc);
1692
1693 switch (op) {
1694 case SCSI_PROT_READ_STRIP:
1695 case SCSI_PROT_WRITE_INSERT:
1696 ret = LPFC_PG_TYPE_NO_DIF;
1697 break;
1698 case SCSI_PROT_READ_INSERT:
1699 case SCSI_PROT_WRITE_STRIP:
1700 case SCSI_PROT_READ_PASS:
1701 case SCSI_PROT_WRITE_PASS:
e2a0a9d6
JS		 1702 ret = LPFC_PG_TYPE_DIF_BUF;
1703 break;
1704 default:
1705 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1706 "9021 Unsupported protection op:%d\n", op);
1707 break;
1708 }
1709
1710 return ret;
1711}
1712
1713/*
1714 * This is the protection/DIF aware version of
1715 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1716 * two functions eventually, but for now, it's here
1717 */
1718static int
1719lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1720 struct lpfc_scsi_buf *lpfc_cmd)
1721{
1722 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1723 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1724 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1725 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1726 uint32_t num_bde = 0;
1727 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1728 int prot_group_type = 0;
1729 int diflen, fcpdl;
1730 unsigned blksize;
1731
1732 /*
1733 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1734 * fcp_rsp regions to the first data bde entry
1735 */
1736 bpl += 2;
1737 if (scsi_sg_count(scsi_cmnd)) {
1738 /*
1739 * The driver stores the segment count returned from pci_map_sg
1740 * because this a count of dma-mappings used to map the use_sg
1741 * pages. They are not guaranteed to be the same for those
1742 * architectures that implement an IOMMU.
1743 */
1744 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1745 scsi_sglist(scsi_cmnd),
1746 scsi_sg_count(scsi_cmnd), datadir);
1747 if (unlikely(!datasegcnt))
1748 return 1;
1749
1750 lpfc_cmd->seg_cnt = datasegcnt;
1751 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
6a9c52cf
JS		 1752 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1753 "9067 BLKGRD: %s: Too many sg segments"
1754 " from dma_map_sg. Config %d, seg_cnt"
1755 " %d\n",
e2a0a9d6
JS		 1756 __func__, phba->cfg_sg_seg_cnt,
1757 lpfc_cmd->seg_cnt);
1758 scsi_dma_unmap(scsi_cmnd);
1759 return 1;
1760 }
1761
1762 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1763
1764 switch (prot_group_type) {
1765 case LPFC_PG_TYPE_NO_DIF:
1766 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1767 datasegcnt);
c9404c9c 1768 /* we should have 2 or more entries in buffer list */
e2a0a9d6
JS		 1769 if (num_bde < 2)
1770 goto err;
1771 break;
1772 case LPFC_PG_TYPE_DIF_BUF:{
1773 /*
1774 * This type indicates that protection buffers are
1775 * passed to the driver, so that needs to be prepared
1776 * for DMA
1777 */
1778 protsegcnt = dma_map_sg(&phba->pcidev->dev,
1779 scsi_prot_sglist(scsi_cmnd),
1780 scsi_prot_sg_count(scsi_cmnd), datadir);
1781 if (unlikely(!protsegcnt)) {
1782 scsi_dma_unmap(scsi_cmnd);
1783 return 1;
1784 }
1785
1786 lpfc_cmd->prot_seg_cnt = protsegcnt;
1787 if (lpfc_cmd->prot_seg_cnt
1788 > phba->cfg_prot_sg_seg_cnt) {
6a9c52cf
JS		 1789 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1790 "9068 BLKGRD: %s: Too many prot sg "
1791 "segments from dma_map_sg. Config %d,"
e2a0a9d6
JS		 1792 "prot_seg_cnt %d\n", __func__,
1793 phba->cfg_prot_sg_seg_cnt,
1794 lpfc_cmd->prot_seg_cnt);
1795 dma_unmap_sg(&phba->pcidev->dev,
1796 scsi_prot_sglist(scsi_cmnd),
1797 scsi_prot_sg_count(scsi_cmnd),
1798 datadir);
1799 scsi_dma_unmap(scsi_cmnd);
1800 return 1;
1801 }
1802
1803 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1804 datasegcnt, protsegcnt);
c9404c9c 1805 /* we should have 3 or more entries in buffer list */
e2a0a9d6
JS		 1806 if (num_bde < 3)
1807 goto err;
1808 break;
1809 }
1810 case LPFC_PG_TYPE_INVALID:
1811 default:
1812 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1813 "9022 Unexpected protection group %i\n",
1814 prot_group_type);
1815 return 1;
1816 }
1817 }
1818
1819 /*
1820 * Finish initializing those IOCB fields that are dependent on the
1821 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
1822 * reinitialized since all iocb memory resources are used many times
1823 * for transmit, receive, and continuation bpl's.
1824 */
1825 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1826 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1827 iocb_cmd->ulpBdeCount = 1;
1828 iocb_cmd->ulpLe = 1;
1829
1830 fcpdl = scsi_bufflen(scsi_cmnd);
1831
1832 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1833 /*
1834 * We are in DIF Type 1 mode
1835 * Every data block has a 8 byte DIF (trailer)
1836 * attached to it. Must ajust FCP data length
1837 */
1838 blksize = lpfc_cmd_blksize(scsi_cmnd);
1839 diflen = (fcpdl / blksize) * 8;
1840 fcpdl += diflen;
1841 }
1842 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1843
1844 /*
1845 * Due to difference in data length between DIF/non-DIF paths,
1846 * we need to set word 4 of IOCB here
1847 */
1848 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1849
dea3101e 1850 return 0;
e2a0a9d6
JS		 1851err:
1852 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1853 "9023 Could not setup all needed BDE's"
1854 "prot_group_type=%d, num_bde=%d\n",
1855 prot_group_type, num_bde);
1856 return 1;
1857}
1858
1859/*
1860 * This function checks for BlockGuard errors detected by
1861 * the HBA. In case of errors, the ASC/ASCQ fields in the
1862 * sense buffer will be set accordingly, paired with
1863 * ILLEGAL_REQUEST to signal to the kernel that the HBA
1864 * detected corruption.
1865 *
1866 * Returns:
1867 * 0 - No error found
1868 * 1 - BlockGuard error found
1869 * -1 - Internal error (bad profile, ...etc)
1870 */
1871static int
1872lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1873 struct lpfc_iocbq *pIocbOut)
1874{
1875 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1876 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1877 int ret = 0;
1878 uint32_t bghm = bgf->bghm;
1879 uint32_t bgstat = bgf->bgstat;
1880 uint64_t failing_sector = 0;
1881
6a9c52cf
JS		 1882 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1883 " 0x%x lba 0x%llx blk cnt 0x%x "
e2a0a9d6 1884 "bgstat=0x%x bghm=0x%x\n",
87b5c328 1885 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
83096ebf 1886 blk_rq_sectors(cmd->request), bgstat, bghm);
e2a0a9d6
JS		 1887
1888 spin_lock(&_dump_buf_lock);
1889 if (!_dump_buf_done) {
6a9c52cf
JS		 1890 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
1891 " Data for %u blocks to debugfs\n",
e2a0a9d6 1892 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
6a9c52cf 1893 lpfc_debug_save_data(phba, cmd);
e2a0a9d6
JS		 1894
1895 /* If we have a prot sgl, save the DIF buffer */
1896 if (lpfc_prot_group_type(phba, cmd) ==
1897 LPFC_PG_TYPE_DIF_BUF) {
6a9c52cf
JS		 1898 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1899 "Saving DIF for %u blocks to debugfs\n",
1900 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1901 lpfc_debug_save_dif(phba, cmd);
e2a0a9d6
JS		 1902 }
1903
1904 _dump_buf_done = 1;
1905 }
1906 spin_unlock(&_dump_buf_lock);
1907
1908 if (lpfc_bgs_get_invalid_prof(bgstat)) {
1909 cmd->result = ScsiResult(DID_ERROR, 0);
6a9c52cf
JS		 1910 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1911 " BlockGuard profile. bgstat:0x%x\n",
1912 bgstat);
e2a0a9d6
JS		 1913 ret = (-1);
1914 goto out;
1915 }
1916
1917 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1918 cmd->result = ScsiResult(DID_ERROR, 0);
6a9c52cf
JS		 1919 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1920 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
e2a0a9d6
JS		 1921 bgstat);
1922 ret = (-1);
1923 goto out;
1924 }
1925
1926 if (lpfc_bgs_get_guard_err(bgstat)) {
1927 ret = 1;
1928
1929 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1930 0x10, 0x1);
1c9fbafc 1931 cmd->result = DRIVER_SENSE << 24
e2a0a9d6
JS		 1932 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1933 phba->bg_guard_err_cnt++;
6a9c52cf
JS		 1934 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1935 "9055 BLKGRD: guard_tag error\n");
e2a0a9d6
JS		 1936 }
1937
1938 if (lpfc_bgs_get_reftag_err(bgstat)) {
1939 ret = 1;
1940
1941 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1942 0x10, 0x3);
1c9fbafc 1943 cmd->result = DRIVER_SENSE << 24
e2a0a9d6
JS		 1944 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1945
1946 phba->bg_reftag_err_cnt++;
6a9c52cf
JS		 1947 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1948 "9056 BLKGRD: ref_tag error\n");
e2a0a9d6
JS		 1949 }
1950
1951 if (lpfc_bgs_get_apptag_err(bgstat)) {
1952 ret = 1;
1953
1954 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1955 0x10, 0x2);
1c9fbafc 1956 cmd->result = DRIVER_SENSE << 24
e2a0a9d6
JS		 1957 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1958
1959 phba->bg_apptag_err_cnt++;
6a9c52cf
JS		 1960 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1961 "9061 BLKGRD: app_tag error\n");
e2a0a9d6
JS		 1962 }
1963
1964 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1965 /*
1966 * setup sense data descriptor 0 per SPC-4 as an information
7c56b9fd
JS		 1967 * field, and put the failing LBA in it.
1968 * This code assumes there was also a guard/app/ref tag error
1969 * indication.
e2a0a9d6 1970 */
7c56b9fd
JS		 1971 cmd->sense_buffer[7] = 0xc; /* Additional sense length */
1972 cmd->sense_buffer[8] = 0; /* Information descriptor type */
1973 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
1974 cmd->sense_buffer[10] = 0x80; /* Validity bit */
2344b5b6 1975 bghm /= cmd->device->sector_size;
e2a0a9d6
JS		 1976
1977 failing_sector = scsi_get_lba(cmd);
1978 failing_sector += bghm;
1979
7c56b9fd
JS		 1980 /* Descriptor Information */
1981 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
e2a0a9d6
JS		 1982 }
1983
1984 if (!ret) {
1985 /* No error was reported - problem in FW? */
1986 cmd->result = ScsiResult(DID_ERROR, 0);
6a9c52cf
JS		 1987 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1988 "9057 BLKGRD: no errors reported!\n");
e2a0a9d6
JS		 1989 }
1990
1991out:
1992 return ret;
dea3101e 1993}
1994
da0436e9
JS		 1995/**
1996 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
1997 * @phba: The Hba for which this call is being executed.
1998 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1999 *
2000 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
2001 * field of @lpfc_cmd for device with SLI-4 interface spec.
2002 *
2003 * Return codes:
6c8eea54
JS		 2004 * 1 - Error
2005 * 0 - Success
da0436e9
JS		 2006 **/
2007static int
2008lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2009{
2010 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2011 struct scatterlist *sgel = NULL;
2012 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2013 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
fedd3b7b 2014 struct sli4_sge *first_data_sgl;
da0436e9
JS		 2015 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2016 dma_addr_t physaddr;
2017 uint32_t num_bde = 0;
2018 uint32_t dma_len;
2019 uint32_t dma_offset = 0;
2020 int nseg;
fedd3b7b 2021 struct ulp_bde64 *bde;
da0436e9
JS		 2022
2023 /*
2024 * There are three possibilities here - use scatter-gather segment, use
2025 * the single mapping, or neither. Start the lpfc command prep by
2026 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2027 * data bde entry.
2028 */
2029 if (scsi_sg_count(scsi_cmnd)) {
2030 /*
2031 * The driver stores the segment count returned from pci_map_sg
2032 * because this a count of dma-mappings used to map the use_sg
2033 * pages. They are not guaranteed to be the same for those
2034 * architectures that implement an IOMMU.
2035 */
2036
2037 nseg = scsi_dma_map(scsi_cmnd);
2038 if (unlikely(!nseg))
2039 return 1;
2040 sgl += 1;
2041 /* clear the last flag in the fcp_rsp map entry */
2042 sgl->word2 = le32_to_cpu(sgl->word2);
2043 bf_set(lpfc_sli4_sge_last, sgl, 0);
2044 sgl->word2 = cpu_to_le32(sgl->word2);
2045 sgl += 1;
fedd3b7b 2046 first_data_sgl = sgl;
da0436e9
JS		 2047 lpfc_cmd->seg_cnt = nseg;
2048 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
6a9c52cf
JS		 2049 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
2050 " %s: Too many sg segments from "
2051 "dma_map_sg. Config %d, seg_cnt %d\n",
2052 __func__, phba->cfg_sg_seg_cnt,
da0436e9
JS		 2053 lpfc_cmd->seg_cnt);
2054 scsi_dma_unmap(scsi_cmnd);
2055 return 1;
2056 }
2057
2058 /*
2059 * The driver established a maximum scatter-gather segment count
2060 * during probe that limits the number of sg elements in any
2061 * single scsi command. Just run through the seg_cnt and format
2062 * the sge's.
2063 * When using SLI-3 the driver will try to fit all the BDEs into
2064 * the IOCB. If it can't then the BDEs get added to a BPL as it
2065 * does for SLI-2 mode.
2066 */
2067 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
2068 physaddr = sg_dma_address(sgel);
2069 dma_len = sg_dma_len(sgel);
da0436e9
JS		 2070 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2071 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
0558056c 2072 sgl->word2 = le32_to_cpu(sgl->word2);
da0436e9
JS		 2073 if ((num_bde + 1) == nseg)
2074 bf_set(lpfc_sli4_sge_last, sgl, 1);
2075 else
2076 bf_set(lpfc_sli4_sge_last, sgl, 0);
2077 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2078 sgl->word2 = cpu_to_le32(sgl->word2);
28baac74 2079 sgl->sge_len = cpu_to_le32(dma_len);
da0436e9
JS		 2080 dma_offset += dma_len;
2081 sgl++;
2082 }
fedd3b7b
JS		 2083 /* setup the performance hint (first data BDE) if enabled */
2084 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
2085 bde = (struct ulp_bde64 *)
2086 &(iocb_cmd->unsli3.sli3Words[5]);
2087 bde->addrLow = first_data_sgl->addr_lo;
2088 bde->addrHigh = first_data_sgl->addr_hi;
2089 bde->tus.f.bdeSize =
2090 le32_to_cpu(first_data_sgl->sge_len);
2091 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2092 bde->tus.w = cpu_to_le32(bde->tus.w);
2093 }
da0436e9
JS		 2094 } else {
2095 sgl += 1;
2096 /* clear the last flag in the fcp_rsp map entry */
2097 sgl->word2 = le32_to_cpu(sgl->word2);
2098 bf_set(lpfc_sli4_sge_last, sgl, 1);
2099 sgl->word2 = cpu_to_le32(sgl->word2);
2100 }
2101
2102 /*
2103 * Finish initializing those IOCB fields that are dependent on the
2104 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
2105 * explicitly reinitialized.
2106 * all iocb memory resources are reused.
2107 */
2108 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
2109
2110 /*
2111 * Due to difference in data length between DIF/non-DIF paths,
2112 * we need to set word 4 of IOCB here
2113 */
2114 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
2115 return 0;
2116}
2117
3772a991
JS		 2118/**
2119 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2120 * @phba: The Hba for which this call is being executed.
2121 * @lpfc_cmd: The scsi buffer which is going to be mapped.
2122 *
2123 * This routine wraps the actual DMA mapping function pointer from the
2124 * lpfc_hba struct.
2125 *
2126 * Return codes:
6c8eea54
JS		 2127 * 1 - Error
2128 * 0 - Success
3772a991
JS		 2129 **/
2130static inline int
2131lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2132{
2133 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2134}
2135
ea2151b4 2136/**
3621a710 2137 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
ea2151b4
JS		 2138 * @phba: Pointer to hba context object.
2139 * @vport: Pointer to vport object.
2140 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2141 * @rsp_iocb: Pointer to response iocb object which reported error.
2142 *
2143 * This function posts an event when there is a SCSI command reporting
2144 * error from the scsi device.
2145 **/
2146static void
2147lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2148 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2149 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2150 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2151 uint32_t resp_info = fcprsp->rspStatus2;
2152 uint32_t scsi_status = fcprsp->rspStatus3;
2153 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2154 struct lpfc_fast_path_event *fast_path_evt = NULL;
2155 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2156 unsigned long flags;
2157
5989b8d4
JS		 2158 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2159 return;
2160
ea2151b4
JS		 2161 /* If there is queuefull or busy condition send a scsi event */
2162 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2163 (cmnd->result == SAM_STAT_BUSY)) {
2164 fast_path_evt = lpfc_alloc_fast_evt(phba);
2165 if (!fast_path_evt)
2166 return;
2167 fast_path_evt->un.scsi_evt.event_type =
2168 FC_REG_SCSI_EVENT;
2169 fast_path_evt->un.scsi_evt.subcategory =
2170 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2171 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2172 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2173 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2174 &pnode->nlp_portname, sizeof(struct lpfc_name));
2175 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2176 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2177 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2178 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2179 fast_path_evt = lpfc_alloc_fast_evt(phba);
2180 if (!fast_path_evt)
2181 return;
2182 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2183 FC_REG_SCSI_EVENT;
2184 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2185 LPFC_EVENT_CHECK_COND;
2186 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2187 cmnd->device->lun;
2188 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2189 &pnode->nlp_portname, sizeof(struct lpfc_name));
2190 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2191 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2192 fast_path_evt->un.check_cond_evt.sense_key =
2193 cmnd->sense_buffer[2] & 0xf;
2194 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2195 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2196 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2197 fcpi_parm &&
2198 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2199 ((scsi_status == SAM_STAT_GOOD) &&
2200 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2201 /*
2202 * If status is good or resid does not match with fcp_param and
2203 * there is valid fcpi_parm, then there is a read_check error
2204 */
2205 fast_path_evt = lpfc_alloc_fast_evt(phba);
2206 if (!fast_path_evt)
2207 return;
2208 fast_path_evt->un.read_check_error.header.event_type =
2209 FC_REG_FABRIC_EVENT;
2210 fast_path_evt->un.read_check_error.header.subcategory =
2211 LPFC_EVENT_FCPRDCHKERR;
2212 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2213 &pnode->nlp_portname, sizeof(struct lpfc_name));
2214 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2215 &pnode->nlp_nodename, sizeof(struct lpfc_name));
2216 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2217 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2218 fast_path_evt->un.read_check_error.fcpiparam =
2219 fcpi_parm;
2220 } else
2221 return;
2222
2223 fast_path_evt->vport = vport;
2224 spin_lock_irqsave(&phba->hbalock, flags);
2225 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2226 spin_unlock_irqrestore(&phba->hbalock, flags);
2227 lpfc_worker_wake_up(phba);
2228 return;
2229}
9bad7671
JS		 2230
2231/**
f1126688 2232 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3772a991 2233 * @phba: The HBA for which this call is being executed.
9bad7671
JS		 2234 * @psb: The scsi buffer which is going to be un-mapped.
2235 *
2236 * This routine does DMA un-mapping of scatter gather list of scsi command
3772a991 2237 * field of @lpfc_cmd for device with SLI-3 interface spec.
9bad7671 2238 **/
bcf4dbfa 2239static void
f1126688 2240lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
bcf4dbfa
JS		 2241{
2242 /*
2243 * There are only two special cases to consider. (1) the scsi command
2244 * requested scatter-gather usage or (2) the scsi command allocated
2245 * a request buffer, but did not request use_sg. There is a third
2246 * case, but it does not require resource deallocation.
2247 */
a0b4f78f
FT		 2248 if (psb->seg_cnt > 0)
2249 scsi_dma_unmap(psb->pCmd);
e2a0a9d6
JS		 2250 if (psb->prot_seg_cnt > 0)
2251 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2252 scsi_prot_sg_count(psb->pCmd),
2253 psb->pCmd->sc_data_direction);
bcf4dbfa
JS		 2254}
2255
9bad7671 2256/**
3621a710 2257 * lpfc_handler_fcp_err - FCP response handler
9bad7671
JS		 2258 * @vport: The virtual port for which this call is being executed.
2259 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2260 * @rsp_iocb: The response IOCB which contains FCP error.
2261 *
2262 * This routine is called to process response IOCB with status field
2263 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2264 * based upon SCSI and FCP error.
2265 **/
dea3101e 2266static void
2e0fef85
JS		 2267lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2268 struct lpfc_iocbq *rsp_iocb)
dea3101e 2269{
2270 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2271 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2272 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
7054a606 2273 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
dea3101e 2274 uint32_t resp_info = fcprsp->rspStatus2;
2275 uint32_t scsi_status = fcprsp->rspStatus3;
c7743956 2276 uint32_t *lp;
dea3101e 2277 uint32_t host_status = DID_OK;
2278 uint32_t rsplen = 0;
c7743956 2279 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
dea3101e 2280
ea2151b4 2281
dea3101e 2282 /*
2283 * If this is a task management command, there is no
2284 * scsi packet associated with this lpfc_cmd. The driver
2285 * consumes it.
2286 */
2287 if (fcpcmd->fcpCntl2) {
2288 scsi_status = 0;
2289 goto out;
2290 }
2291
6a9c52cf
JS		 2292 if (resp_info & RSP_LEN_VALID) {
2293 rsplen = be32_to_cpu(fcprsp->rspRspLen);
e40a02c1 2294 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
6a9c52cf
JS		 2295 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2296 "2719 Invalid response length: "
2297 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2298 cmnd->device->id,
2299 cmnd->device->lun, cmnd->cmnd[0],
2300 rsplen);
2301 host_status = DID_ERROR;
2302 goto out;
2303 }
e40a02c1
JS		 2304 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2305 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2306 "2757 Protocol failure detected during "
2307 "processing of FCP I/O op: "
2308 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2309 cmnd->device->id,
2310 cmnd->device->lun, cmnd->cmnd[0],
2311 fcprsp->rspInfo3);
2312 host_status = DID_ERROR;
2313 goto out;
2314 }
6a9c52cf
JS		 2315 }
2316
c7743956
JS		 2317 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2318 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2319 if (snslen > SCSI_SENSE_BUFFERSIZE)
2320 snslen = SCSI_SENSE_BUFFERSIZE;
2321
2322 if (resp_info & RSP_LEN_VALID)
2323 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2324 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2325 }
2326 lp = (uint32_t *)cmnd->sense_buffer;
2327
73d91e50
JS		 2328 if (!scsi_status && (resp_info & RESID_UNDER) &&
2329 vport->cfg_log_verbose & LOG_FCP_UNDER)
2330 logit = LOG_FCP_UNDER;
c7743956 2331
e8b62011 2332 lpfc_printf_vlog(vport, KERN_WARNING, logit,
e2a0a9d6 2333 "9024 FCP command x%x failed: x%x SNS x%x x%x "
e8b62011
JS		 2334 "Data: x%x x%x x%x x%x x%x\n",
2335 cmnd->cmnd[0], scsi_status,
2336 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2337 be32_to_cpu(fcprsp->rspResId),
2338 be32_to_cpu(fcprsp->rspSnsLen),
2339 be32_to_cpu(fcprsp->rspRspLen),
2340 fcprsp->rspInfo3);
dea3101e 2341
a0b4f78f 2342 scsi_set_resid(cmnd, 0);
dea3101e 2343 if (resp_info & RESID_UNDER) {
a0b4f78f 2344 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
dea3101e 2345
73d91e50 2346 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
e2a0a9d6 2347 "9025 FCP Read Underrun, expected %d, "
e8b62011
JS		 2348 "residual %d Data: x%x x%x x%x\n",
2349 be32_to_cpu(fcpcmd->fcpDl),
2350 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2351 cmnd->underflow);
dea3101e 2352
7054a606
JS		 2353 /*
2354 * If there is an under run check if under run reported by
2355 * storage array is same as the under run reported by HBA.
2356 * If this is not same, there is a dropped frame.
2357 */
2358 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2359 fcpi_parm &&
a0b4f78f 2360 (scsi_get_resid(cmnd) != fcpi_parm)) {
e8b62011
JS		 2361 lpfc_printf_vlog(vport, KERN_WARNING,
2362 LOG_FCP | LOG_FCP_ERROR,
e2a0a9d6 2363 "9026 FCP Read Check Error "
e8b62011
JS		 2364 "and Underrun Data: x%x x%x x%x x%x\n",
2365 be32_to_cpu(fcpcmd->fcpDl),
2366 scsi_get_resid(cmnd), fcpi_parm,
2367 cmnd->cmnd[0]);
a0b4f78f 2368 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
7054a606
JS		 2369 host_status = DID_ERROR;
2370 }
dea3101e 2371 /*
2372 * The cmnd->underflow is the minimum number of bytes that must
25985edc 2373 * be transferred for this command. Provided a sense condition
dea3101e 2374 * is not present, make sure the actual amount transferred is at
2375 * least the underflow value or fail.
2376 */
2377 if (!(resp_info & SNS_LEN_VALID) &&
2378 (scsi_status == SAM_STAT_GOOD) &&
a0b4f78f
FT		 2379 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2380 < cmnd->underflow)) {
e8b62011 2381 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
e2a0a9d6 2382 "9027 FCP command x%x residual "
e8b62011
JS		 2383 "underrun converted to error "
2384 "Data: x%x x%x x%x\n",
66dbfbe6 2385 cmnd->cmnd[0], scsi_bufflen(cmnd),
e8b62011 2386 scsi_get_resid(cmnd), cmnd->underflow);
dea3101e 2387 host_status = DID_ERROR;
2388 }
2389 } else if (resp_info & RESID_OVER) {
e8b62011 2390 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
e2a0a9d6 2391 "9028 FCP command x%x residual overrun error. "
e4e74273 2392 "Data: x%x x%x\n", cmnd->cmnd[0],
e8b62011 2393 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
dea3101e 2394 host_status = DID_ERROR;
2395
2396 /*
2397 * Check SLI validation that all the transfer was actually done
2398 * (fcpi_parm should be zero). Apply check only to reads.
2399 */
eee8877e 2400 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
e8b62011 2401 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
e2a0a9d6 2402 "9029 FCP Read Check Error Data: "
eee8877e 2403 "x%x x%x x%x x%x x%x\n",
e8b62011
JS		 2404 be32_to_cpu(fcpcmd->fcpDl),
2405 be32_to_cpu(fcprsp->rspResId),
eee8877e
JS		 2406 fcpi_parm, cmnd->cmnd[0], scsi_status);
2407 switch (scsi_status) {
2408 case SAM_STAT_GOOD:
2409 case SAM_STAT_CHECK_CONDITION:
2410 /* Fabric dropped a data frame. Fail any successful
2411 * command in which we detected dropped frames.
2412 * A status of good or some check conditions could
2413 * be considered a successful command.
2414 */
2415 host_status = DID_ERROR;
2416 break;
2417 }
a0b4f78f 2418 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
dea3101e 2419 }
2420
2421 out:
2422 cmnd->result = ScsiResult(host_status, scsi_status);
ea2151b4 2423 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
dea3101e 2424}
2425
9bad7671 2426/**
3621a710 2427 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
9bad7671
JS		 2428 * @phba: The Hba for which this call is being executed.
2429 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3772a991 2430 * @pIocbOut: The response IOCBQ for the scsi cmnd.
9bad7671
JS		 2431 *
2432 * This routine assigns scsi command result by looking into response IOCB
2433 * status field appropriately. This routine handles QUEUE FULL condition as
2434 * well by ramping down device queue depth.
2435 **/
dea3101e 2436static void
2437lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2438 struct lpfc_iocbq *pIocbOut)
2439{
2440 struct lpfc_scsi_buf *lpfc_cmd =
2441 (struct lpfc_scsi_buf *) pIocbIn->context1;
2e0fef85 2442 struct lpfc_vport *vport = pIocbIn->vport;
dea3101e 2443 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2444 struct lpfc_nodelist *pnode = rdata->pnode;
75baf696 2445 struct scsi_cmnd *cmd;
445cf4f4 2446 int result;
a257bf90 2447 struct scsi_device *tmp_sdev;
5ffc266e 2448 int depth;
fa61a54e 2449 unsigned long flags;
ea2151b4 2450 struct lpfc_fast_path_event *fast_path_evt;
75baf696 2451 struct Scsi_Host *shost;
a257bf90 2452 uint32_t queue_depth, scsi_id;
73d91e50 2453 uint32_t logit = LOG_FCP;
dea3101e 2454
75baf696
JS		 2455 /* Sanity check on return of outstanding command */
2456 if (!(lpfc_cmd->pCmd))
2457 return;
2458 cmd = lpfc_cmd->pCmd;
2459 shost = cmd->device->host;
2460
dea3101e 2461 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2462 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
341af102
JS		 2463 /* pick up SLI4 exhange busy status from HBA */
2464 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2465
109f6ed0
JS		 2466 if (pnode && NLP_CHK_NODE_ACT(pnode))
2467 atomic_dec(&pnode->cmd_pending);
dea3101e 2468
2469 if (lpfc_cmd->status) {
2470 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2471 (lpfc_cmd->result & IOERR_DRVR_MASK))
2472 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2473 else if (lpfc_cmd->status >= IOSTAT_CNT)
2474 lpfc_cmd->status = IOSTAT_DEFAULT;
73d91e50
JS		 2475 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR
2476 && !lpfc_cmd->fcp_rsp->rspStatus3
2477 && (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER)
2478 && !(phba->cfg_log_verbose & LOG_FCP_UNDER))
2479 logit = 0;
2480 else
2481 logit = LOG_FCP | LOG_FCP_UNDER;
2482 lpfc_printf_vlog(vport, KERN_WARNING, logit,
2483 "9030 FCP cmd x%x failed <%d/%d> "
2484 "status: x%x result: x%x Data: x%x x%x\n",
2485 cmd->cmnd[0],
2486 cmd->device ? cmd->device->id : 0xffff,
2487 cmd->device ? cmd->device->lun : 0xffff,
2488 lpfc_cmd->status, lpfc_cmd->result,
2489 pIocbOut->iocb.ulpContext,
2490 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
dea3101e 2491
2492 switch (lpfc_cmd->status) {
2493 case IOSTAT_FCP_RSP_ERROR:
2494 /* Call FCP RSP handler to determine result */
2e0fef85 2495 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
dea3101e 2496 break;
2497 case IOSTAT_NPORT_BSY:
2498 case IOSTAT_FABRIC_BSY:
0f1f53a7 2499 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
ea2151b4
JS		 2500 fast_path_evt = lpfc_alloc_fast_evt(phba);
2501 if (!fast_path_evt)
2502 break;
2503 fast_path_evt->un.fabric_evt.event_type =
2504 FC_REG_FABRIC_EVENT;
2505 fast_path_evt->un.fabric_evt.subcategory =
2506 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2507 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2508 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2509 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2510 &pnode->nlp_portname,
2511 sizeof(struct lpfc_name));
2512 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2513 &pnode->nlp_nodename,
2514 sizeof(struct lpfc_name));
2515 }
2516 fast_path_evt->vport = vport;
2517 fast_path_evt->work_evt.evt =
2518 LPFC_EVT_FASTPATH_MGMT_EVT;
2519 spin_lock_irqsave(&phba->hbalock, flags);
2520 list_add_tail(&fast_path_evt->work_evt.evt_listp,
2521 &phba->work_list);
2522 spin_unlock_irqrestore(&phba->hbalock, flags);
2523 lpfc_worker_wake_up(phba);
dea3101e 2524 break;
92d7f7b0 2525 case IOSTAT_LOCAL_REJECT:
1151e3ec 2526 case IOSTAT_REMOTE_STOP:
ab56dc2e
JS		 2527 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
2528 lpfc_cmd->result ==
2529 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
2530 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
2531 lpfc_cmd->result ==
2532 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
2533 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
2534 break;
2535 }
d7c255b2 2536 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
92d7f7b0 2537 lpfc_cmd->result == IOERR_NO_RESOURCES ||
b92938b4
JS		 2538 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2539 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
92d7f7b0 2540 cmd->result = ScsiResult(DID_REQUEUE, 0);
58da1ffb 2541 break;
e2a0a9d6 2542 }
e2a0a9d6
JS		 2543 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2544 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2545 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2546 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2547 /*
2548 * This is a response for a BG enabled
2549 * cmd. Parse BG error
2550 */
2551 lpfc_parse_bg_err(phba, lpfc_cmd,
2552 pIocbOut);
2553 break;
2554 } else {
2555 lpfc_printf_vlog(vport, KERN_WARNING,
2556 LOG_BG,
2557 "9031 non-zero BGSTAT "
6a9c52cf 2558 "on unprotected cmd\n");
e2a0a9d6
JS		 2559 }
2560 }
1151e3ec
JS		 2561 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
2562 && (phba->sli_rev == LPFC_SLI_REV4)
2563 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
2564 /* This IO was aborted by the target, we don't
2565 * know the rxid and because we did not send the
2566 * ABTS we cannot generate and RRQ.
2567 */
2568 lpfc_set_rrq_active(phba, pnode,
2569 lpfc_cmd->cur_iocbq.sli4_xritag,
2570 0, 0);
2571 }
e2a0a9d6 2572 /* else: fall through */
dea3101e 2573 default:
2574 cmd->result = ScsiResult(DID_ERROR, 0);
2575 break;
2576 }
2577
58da1ffb 2578 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
19a7b4ae 2579 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
0f1f53a7
JS		 2580 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2581 SAM_STAT_BUSY);
ab56dc2e 2582 } else
dea3101e 2583 cmd->result = ScsiResult(DID_OK, 0);
dea3101e 2584
2585 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2586 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2587
e8b62011
JS		 2588 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2589 "0710 Iodone <%d/%d> cmd %p, error "
2590 "x%x SNS x%x x%x Data: x%x x%x\n",
2591 cmd->device->id, cmd->device->lun, cmd,
2592 cmd->result, *lp, *(lp + 3), cmd->retries,
2593 scsi_get_resid(cmd));
dea3101e 2594 }
2595
ea2151b4 2596 lpfc_update_stats(phba, lpfc_cmd);
445cf4f4 2597 result = cmd->result;
977b5a0a
JS		 2598 if (vport->cfg_max_scsicmpl_time &&
2599 time_after(jiffies, lpfc_cmd->start_time +
2600 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
a257bf90 2601 spin_lock_irqsave(shost->host_lock, flags);
109f6ed0
JS		 2602 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2603 if (pnode->cmd_qdepth >
2604 atomic_read(&pnode->cmd_pending) &&
2605 (atomic_read(&pnode->cmd_pending) >
2606 LPFC_MIN_TGT_QDEPTH) &&
2607 ((cmd->cmnd[0] == READ_10) ||
2608 (cmd->cmnd[0] == WRITE_10)))
2609 pnode->cmd_qdepth =
2610 atomic_read(&pnode->cmd_pending);
2611
2612 pnode->last_change_time = jiffies;
2613 }
a257bf90 2614 spin_unlock_irqrestore(shost->host_lock, flags);
109f6ed0 2615 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
7dc517df 2616 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
977b5a0a 2617 time_after(jiffies, pnode->last_change_time +
109f6ed0 2618 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
a257bf90 2619 spin_lock_irqsave(shost->host_lock, flags);
7dc517df
JS		 2620 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2621 / 100;
2622 depth = depth ? depth : 1;
2623 pnode->cmd_qdepth += depth;
2624 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2625 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
109f6ed0 2626 pnode->last_change_time = jiffies;
a257bf90 2627 spin_unlock_irqrestore(shost->host_lock, flags);
109f6ed0 2628 }
977b5a0a
JS		 2629 }
2630
1dcb58e5 2631 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
a257bf90
JS		 2632
2633 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2634 queue_depth = cmd->device->queue_depth;
2635 scsi_id = cmd->device->id;
0bd4ca25
JSEC		 2636 cmd->scsi_done(cmd);
2637
b808608b 2638 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
fa61a54e
JS		 2639 /*
2640 * If there is a thread waiting for command completion
2641 * wake up the thread.
2642 */
a257bf90 2643 spin_lock_irqsave(shost->host_lock, flags);
495a714c 2644 lpfc_cmd->pCmd = NULL;
fa61a54e
JS		 2645 if (lpfc_cmd->waitq)
2646 wake_up(lpfc_cmd->waitq);
a257bf90 2647 spin_unlock_irqrestore(shost->host_lock, flags);
b808608b
JW		 2648 lpfc_release_scsi_buf(phba, lpfc_cmd);
2649 return;
2650 }
2651
92d7f7b0 2652 if (!result)
a257bf90 2653 lpfc_rampup_queue_depth(vport, queue_depth);
92d7f7b0 2654
445cf4f4
JSEC		 2655 /*
2656 * Check for queue full. If the lun is reporting queue full, then
2657 * back off the lun queue depth to prevent target overloads.
2658 */
58da1ffb
JS		 2659 if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2660 NLP_CHK_NODE_ACT(pnode)) {
a257bf90
JS		 2661 shost_for_each_device(tmp_sdev, shost) {
2662 if (tmp_sdev->id != scsi_id)
445cf4f4
JSEC		 2663 continue;
2664 depth = scsi_track_queue_full(tmp_sdev,
5ffc266e
JS		 2665 tmp_sdev->queue_depth-1);
2666 if (depth <= 0)
2667 continue;
e8b62011
JS		 2668 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2669 "0711 detected queue full - lun queue "
2670 "depth adjusted to %d.\n", depth);
ea2151b4 2671 lpfc_send_sdev_queuedepth_change_event(phba, vport,
5ffc266e
JS		 2672 pnode,
2673 tmp_sdev->lun,
2674 depth+1, depth);
445cf4f4
JSEC		 2675 }
2676 }
2677
fa61a54e
JS		 2678 /*
2679 * If there is a thread waiting for command completion
2680 * wake up the thread.
2681 */
a257bf90 2682 spin_lock_irqsave(shost->host_lock, flags);
495a714c 2683 lpfc_cmd->pCmd = NULL;
fa61a54e
JS		 2684 if (lpfc_cmd->waitq)
2685 wake_up(lpfc_cmd->waitq);
a257bf90 2686 spin_unlock_irqrestore(shost->host_lock, flags);
fa61a54e 2687
0bd4ca25 2688 lpfc_release_scsi_buf(phba, lpfc_cmd);
dea3101e 2689}
2690
34b02dcd 2691/**
3621a710 2692 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
34b02dcd
JS		 2693 * @data: A pointer to the immediate command data portion of the IOCB.
2694 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2695 *
2696 * The routine copies the entire FCP command from @fcp_cmnd to @data while
2697 * byte swapping the data to big endian format for transmission on the wire.
2698 **/
2699static void
2700lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2701{
2702 int i, j;
2703 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2704 i += sizeof(uint32_t), j++) {
2705 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2706 }
2707}
2708
9bad7671 2709/**
f1126688 2710 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
9bad7671
JS		 2711 * @vport: The virtual port for which this call is being executed.
2712 * @lpfc_cmd: The scsi command which needs to send.
2713 * @pnode: Pointer to lpfc_nodelist.
2714 *
2715 * This routine initializes fcp_cmnd and iocb data structure from scsi command
3772a991 2716 * to transfer for device with SLI3 interface spec.
9bad7671 2717 **/
dea3101e 2718static void
f1126688 2719lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2e0fef85 2720 struct lpfc_nodelist *pnode)
dea3101e 2721{
2e0fef85 2722 struct lpfc_hba *phba = vport->phba;
dea3101e 2723 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2724 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2725 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2726 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2727 int datadir = scsi_cmnd->sc_data_direction;
7e2b19fb 2728 char tag[2];
dea3101e 2729
58da1ffb
JS		 2730 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2731 return;
2732
dea3101e 2733 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
69859dc4
JSEC		 2734 /* clear task management bits */
2735 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
dea3101e 2736
91886523
JSEC		 2737 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2738 &lpfc_cmd->fcp_cmnd->fcp_lun);
dea3101e 2739
2740 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2741
7e2b19fb
JS		 2742 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2743 switch (tag[0]) {
dea3101e 2744 case HEAD_OF_QUEUE_TAG:
2745 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2746 break;
2747 case ORDERED_QUEUE_TAG:
2748 fcp_cmnd->fcpCntl1 = ORDERED_Q;
2749 break;
2750 default:
2751 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2752 break;
2753 }
2754 } else
2755 fcp_cmnd->fcpCntl1 = 0;
2756
2757 /*
2758 * There are three possibilities here - use scatter-gather segment, use
2759 * the single mapping, or neither. Start the lpfc command prep by
2760 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2761 * data bde entry.
2762 */
a0b4f78f 2763 if (scsi_sg_count(scsi_cmnd)) {
dea3101e 2764 if (datadir == DMA_TO_DEVICE) {
2765 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
3772a991
JS		 2766 if (phba->sli_rev < LPFC_SLI_REV4) {
2767 iocb_cmd->un.fcpi.fcpi_parm = 0;
2768 iocb_cmd->ulpPU = 0;
2769 } else
2770 iocb_cmd->ulpPU = PARM_READ_CHECK;
dea3101e 2771 fcp_cmnd->fcpCntl3 = WRITE_DATA;
2772 phba->fc4OutputRequests++;
2773 } else {
2774 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2775 iocb_cmd->ulpPU = PARM_READ_CHECK;
dea3101e 2776 fcp_cmnd->fcpCntl3 = READ_DATA;
2777 phba->fc4InputRequests++;
2778 }
2779 } else {
2780 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2781 iocb_cmd->un.fcpi.fcpi_parm = 0;
2782 iocb_cmd->ulpPU = 0;
2783 fcp_cmnd->fcpCntl3 = 0;
2784 phba->fc4ControlRequests++;
2785 }
e2a0a9d6
JS		 2786 if (phba->sli_rev == 3 &&
2787 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
34b02dcd 2788 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
dea3101e 2789 /*
2790 * Finish initializing those IOCB fields that are independent
2791 * of the scsi_cmnd request_buffer
2792 */
2793 piocbq->iocb.ulpContext = pnode->nlp_rpi;
6d368e53
JS		 2794 if (phba->sli_rev == LPFC_SLI_REV4)
2795 piocbq->iocb.ulpContext =
2796 phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
dea3101e 2797 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2798 piocbq->iocb.ulpFCP2Rcvy = 1;
09372820
JS		 2799 else
2800 piocbq->iocb.ulpFCP2Rcvy = 0;
dea3101e 2801
2802 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2803 piocbq->context1 = lpfc_cmd;
2804 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2805 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2e0fef85 2806 piocbq->vport = vport;
dea3101e 2807}
2808
da0436e9 2809/**
6d368e53 2810 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
9bad7671
JS		 2811 * @vport: The virtual port for which this call is being executed.
2812 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2813 * @lun: Logical unit number.
2814 * @task_mgmt_cmd: SCSI task management command.
2815 *
3772a991
JS		 2816 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2817 * for device with SLI-3 interface spec.
9bad7671
JS		 2818 *
2819 * Return codes:
2820 * 0 - Error
2821 * 1 - Success
2822 **/
dea3101e 2823static int
f1126688 2824lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
dea3101e 2825 struct lpfc_scsi_buf *lpfc_cmd,
420b630d 2826 unsigned int lun,
dea3101e 2827 uint8_t task_mgmt_cmd)
2828{
dea3101e 2829 struct lpfc_iocbq *piocbq;
2830 IOCB_t *piocb;
2831 struct fcp_cmnd *fcp_cmnd;
0b18ac42 2832 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
dea3101e 2833 struct lpfc_nodelist *ndlp = rdata->pnode;
2834
58da1ffb
JS		 2835 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2836 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
dea3101e 2837 return 0;
dea3101e 2838
dea3101e 2839 piocbq = &(lpfc_cmd->cur_iocbq);
2e0fef85
JS		 2840 piocbq->vport = vport;
2841
dea3101e 2842 piocb = &piocbq->iocb;
2843
2844 fcp_cmnd = lpfc_cmd->fcp_cmnd;
34b02dcd
JS		 2845 /* Clear out any old data in the FCP command area */
2846 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2847 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
dea3101e 2848 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
e2a0a9d6
JS		 2849 if (vport->phba->sli_rev == 3 &&
2850 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
34b02dcd 2851 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
dea3101e 2852 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
dea3101e 2853 piocb->ulpContext = ndlp->nlp_rpi;
6d368e53
JS		 2854 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
2855 piocb->ulpContext =
2856 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
2857 }
dea3101e 2858 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2859 piocb->ulpFCP2Rcvy = 1;
2860 }
2861 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2862
2863 /* ulpTimeout is only one byte */
2864 if (lpfc_cmd->timeout > 0xff) {
2865 /*
2866 * Do not timeout the command at the firmware level.
2867 * The driver will provide the timeout mechanism.
2868 */
2869 piocb->ulpTimeout = 0;
f1126688 2870 } else
dea3101e 2871 piocb->ulpTimeout = lpfc_cmd->timeout;
da0436e9 2872
f1126688
JS		 2873 if (vport->phba->sli_rev == LPFC_SLI_REV4)
2874 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
3772a991 2875
f1126688 2876 return 1;
3772a991
JS		 2877}
2878
2879/**
25985edc 2880 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
3772a991
JS		 2881 * @phba: The hba struct for which this call is being executed.
2882 * @dev_grp: The HBA PCI-Device group number.
2883 *
2884 * This routine sets up the SCSI interface API function jump table in @phba
2885 * struct.
2886 * Returns: 0 - success, -ENODEV - failure.
2887 **/
2888int
2889lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2890{
2891
f1126688
JS		 2892 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2893 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
f1126688 2894
3772a991
JS		 2895 switch (dev_grp) {
2896 case LPFC_PCI_DEV_LP:
2897 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2898 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
3772a991 2899 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
19ca7609 2900 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
3772a991 2901 break;
da0436e9
JS		 2902 case LPFC_PCI_DEV_OC:
2903 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2904 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
da0436e9 2905 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
19ca7609 2906 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
da0436e9 2907 break;
3772a991
JS		 2908 default:
2909 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2910 "1418 Invalid HBA PCI-device group: 0x%x\n",
2911 dev_grp);
2912 return -ENODEV;
2913 break;
2914 }
3772a991 2915 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
84d1b006 2916 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
3772a991
JS		 2917 return 0;
2918}
2919
9bad7671 2920/**
3621a710 2921 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
9bad7671
JS		 2922 * @phba: The Hba for which this call is being executed.
2923 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2924 * @rspiocbq: Pointer to lpfc_iocbq data structure.
2925 *
2926 * This routine is IOCB completion routine for device reset and target reset
2927 * routine. This routine release scsi buffer associated with lpfc_cmd.
2928 **/
7054a606
JS		 2929static void
2930lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2931 struct lpfc_iocbq *cmdiocbq,
2932 struct lpfc_iocbq *rspiocbq)
2933{
2934 struct lpfc_scsi_buf *lpfc_cmd =
2935 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2936 if (lpfc_cmd)
2937 lpfc_release_scsi_buf(phba, lpfc_cmd);
2938 return;
2939}
2940
9bad7671 2941/**
3621a710 2942 * lpfc_info - Info entry point of scsi_host_template data structure
9bad7671
JS		 2943 * @host: The scsi host for which this call is being executed.
2944 *
2945 * This routine provides module information about hba.
2946 *
2947 * Reutrn code:
2948 * Pointer to char - Success.
2949 **/
dea3101e 2950const char *
2951lpfc_info(struct Scsi_Host *host)
2952{
2e0fef85
JS		 2953 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2954 struct lpfc_hba *phba = vport->phba;
dea3101e 2955 int len;
2956 static char lpfcinfobuf[384];
2957
2958 memset(lpfcinfobuf,0,384);
2959 if (phba && phba->pcidev){
2960 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2961 len = strlen(lpfcinfobuf);
2962 snprintf(lpfcinfobuf + len,
2963 384-len,
2964 " on PCI bus %02x device %02x irq %d",
2965 phba->pcidev->bus->number,
2966 phba->pcidev->devfn,
2967 phba->pcidev->irq);
2968 len = strlen(lpfcinfobuf);
2969 if (phba->Port[0]) {
2970 snprintf(lpfcinfobuf + len,
2971 384-len,
2972 " port %s",
2973 phba->Port);
2974 }
65467b6b
JS		 2975 len = strlen(lpfcinfobuf);
2976 if (phba->sli4_hba.link_state.logical_speed) {
2977 snprintf(lpfcinfobuf + len,
2978 384-len,
2979 " Logical Link Speed: %d Mbps",
2980 phba->sli4_hba.link_state.logical_speed * 10);
2981 }
dea3101e 2982 }
2983 return lpfcinfobuf;
2984}
2985
9bad7671 2986/**
3621a710 2987 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
9bad7671
JS		 2988 * @phba: The Hba for which this call is being executed.
2989 *
2990 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
2991 * The default value of cfg_poll_tmo is 10 milliseconds.
2992 **/
875fbdfe
JSEC		 2993static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2994{
2995 unsigned long poll_tmo_expires =
2996 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2997
2998 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2999 mod_timer(&phba->fcp_poll_timer,
3000 poll_tmo_expires);
3001}
3002
9bad7671 3003/**
3621a710 3004 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
9bad7671
JS		 3005 * @phba: The Hba for which this call is being executed.
3006 *
3007 * This routine starts the fcp_poll_timer of @phba.
3008 **/
875fbdfe
JSEC		 3009void lpfc_poll_start_timer(struct lpfc_hba * phba)
3010{
3011 lpfc_poll_rearm_timer(phba);
3012}
3013
9bad7671 3014/**
3621a710 3015 * lpfc_poll_timeout - Restart polling timer
9bad7671
JS		 3016 * @ptr: Map to lpfc_hba data structure pointer.
3017 *
3018 * This routine restarts fcp_poll timer, when FCP ring polling is enable
3019 * and FCP Ring interrupt is disable.
3020 **/
3021
875fbdfe
JSEC		 3022void lpfc_poll_timeout(unsigned long ptr)
3023{
2e0fef85 3024 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
875fbdfe
JSEC		 3025
3026 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
45ed1190
JS		 3027 lpfc_sli_handle_fast_ring_event(phba,
3028 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3029
875fbdfe
JSEC		 3030 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3031 lpfc_poll_rearm_timer(phba);
3032 }
875fbdfe
JSEC		 3033}
3034
9bad7671 3035/**
3621a710 3036 * lpfc_queuecommand - scsi_host_template queuecommand entry point
9bad7671
JS		 3037 * @cmnd: Pointer to scsi_cmnd data structure.
3038 * @done: Pointer to done routine.
3039 *
3040 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
3041 * This routine prepares an IOCB from scsi command and provides to firmware.
3042 * The @done callback is invoked after driver finished processing the command.
3043 *
3044 * Return value :
3045 * 0 - Success
3046 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
3047 **/
dea3101e 3048static int
f281233d 3049lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
dea3101e 3050{
2e0fef85
JS		 3051 struct Scsi_Host *shost = cmnd->device->host;
3052 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3053 struct lpfc_hba *phba = vport->phba;
dea3101e 3054 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1c6f4ef5 3055 struct lpfc_nodelist *ndlp;
0bd4ca25 3056 struct lpfc_scsi_buf *lpfc_cmd;
19a7b4ae 3057 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
19a7b4ae 3058 int err;
dea3101e 3059
19a7b4ae
JSEC		 3060 err = fc_remote_port_chkready(rport);
3061 if (err) {
3062 cmnd->result = err;
dea3101e 3063 goto out_fail_command;
3064 }
1c6f4ef5 3065 ndlp = rdata->pnode;
dea3101e 3066
bf08611b
JS		 3067 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
3068 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) ||
3069 (phba->sli_rev == LPFC_SLI_REV4))) {
e2a0a9d6 3070
6a9c52cf
JS		 3071 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
3072 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
3073 " op:%02x str=%s without registering for"
3074 " BlockGuard - Rejecting command\n",
e2a0a9d6
JS		 3075 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3076 dif_op_str[scsi_get_prot_op(cmnd)]);
3077 goto out_fail_command;
3078 }
3079
dea3101e 3080 /*
19a7b4ae
JSEC		 3081 * Catch race where our node has transitioned, but the
3082 * transport is still transitioning.
dea3101e 3083 */
b522d7d4 3084 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
f55ca84d 3085 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
b522d7d4
JS		 3086 goto out_fail_command;
3087 }
7dc517df 3088 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
3496343d 3089 goto out_tgt_busy;
a93ce024 3090
19ca7609 3091 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
dea3101e 3092 if (lpfc_cmd == NULL) {
eaf15d5b 3093 lpfc_rampdown_queue_depth(phba);
92d7f7b0 3094
e8b62011
JS		 3095 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3096 "0707 driver's buffer pool is empty, "
3097 "IO busied\n");
dea3101e 3098 goto out_host_busy;
3099 }
3100
3101 /*
3102 * Store the midlayer's command structure for the completion phase
3103 * and complete the command initialization.
3104 */
3105 lpfc_cmd->pCmd = cmnd;
3106 lpfc_cmd->rdata = rdata;
3107 lpfc_cmd->timeout = 0;
977b5a0a 3108 lpfc_cmd->start_time = jiffies;
dea3101e 3109 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
3110 cmnd->scsi_done = done;
3111
e2a0a9d6 3112 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
6a9c52cf
JS		 3113 if (vport->phba->cfg_enable_bg) {
3114 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6
JS		 3115 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
3116 "str=%s\n",
3117 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3118 dif_op_str[scsi_get_prot_op(cmnd)]);
6a9c52cf 3119 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6 3120 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
e4e74273 3121 "%02x %02x %02x %02x %02x\n",
e2a0a9d6
JS		 3122 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
3123 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
3124 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
3125 cmnd->cmnd[9]);
6a9c52cf
JS		 3126 if (cmnd->cmnd[0] == READ_10)
3127 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6 3128 "9035 BLKGRD: READ @ sector %llu, "
83096ebf
TH		 3129 "count %u\n",
3130 (unsigned long long)scsi_get_lba(cmnd),
3131 blk_rq_sectors(cmnd->request));
6a9c52cf
JS		 3132 else if (cmnd->cmnd[0] == WRITE_10)
3133 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6 3134 "9036 BLKGRD: WRITE @ sector %llu, "
83096ebf 3135 "count %u cmd=%p\n",
87b5c328 3136 (unsigned long long)scsi_get_lba(cmnd),
83096ebf 3137 blk_rq_sectors(cmnd->request),
e2a0a9d6 3138 cmnd);
6a9c52cf 3139 }
e2a0a9d6
JS		 3140
3141 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3142 } else {
6a9c52cf 3143 if (vport->phba->cfg_enable_bg) {
e2a0a9d6 3144 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
6a9c52cf
JS		 3145 "9038 BLKGRD: rcvd unprotected cmd:"
3146 "%02x op:%02x str=%s\n",
3147 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3148 dif_op_str[scsi_get_prot_op(cmnd)]);
3149 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3150 "9039 BLKGRD: CDB: %02x %02x %02x "
3151 "%02x %02x %02x %02x %02x %02x %02x\n",
3152 cmnd->cmnd[0], cmnd->cmnd[1],
3153 cmnd->cmnd[2], cmnd->cmnd[3],
3154 cmnd->cmnd[4], cmnd->cmnd[5],
3155 cmnd->cmnd[6], cmnd->cmnd[7],
3156 cmnd->cmnd[8], cmnd->cmnd[9]);
3157 if (cmnd->cmnd[0] == READ_10)
3158 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3159 "9040 dbg: READ @ sector %llu, "
3160 "count %u\n",
3161 (unsigned long long)scsi_get_lba(cmnd),
83096ebf 3162 blk_rq_sectors(cmnd->request));
6a9c52cf
JS		 3163 else if (cmnd->cmnd[0] == WRITE_10)
3164 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6 3165 "9041 dbg: WRITE @ sector %llu, "
83096ebf 3166 "count %u cmd=%p\n",
87b5c328 3167 (unsigned long long)scsi_get_lba(cmnd),
83096ebf 3168 blk_rq_sectors(cmnd->request), cmnd);
6a9c52cf
JS		 3169 else
3170 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
e2a0a9d6 3171 "9042 dbg: parser not implemented\n");
6a9c52cf 3172 }
e2a0a9d6
JS		 3173 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3174 }
3175
dea3101e 3176 if (err)
3177 goto out_host_busy_free_buf;
3178
2e0fef85 3179 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
dea3101e 3180
977b5a0a 3181 atomic_inc(&ndlp->cmd_pending);
3772a991 3182 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
92d7f7b0 3183 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
eaf15d5b
JS		 3184 if (err) {
3185 atomic_dec(&ndlp->cmd_pending);
dea3101e 3186 goto out_host_busy_free_buf;
eaf15d5b 3187 }
875fbdfe 3188 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
45ed1190
JS		 3189 spin_unlock(shost->host_lock);
3190 lpfc_sli_handle_fast_ring_event(phba,
3191 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3192
3193 spin_lock(shost->host_lock);
875fbdfe
JSEC		 3194 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3195 lpfc_poll_rearm_timer(phba);
3196 }
3197
dea3101e 3198 return 0;
3199
3200 out_host_busy_free_buf:
bcf4dbfa 3201 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
0bd4ca25 3202 lpfc_release_scsi_buf(phba, lpfc_cmd);
dea3101e 3203 out_host_busy:
3204 return SCSI_MLQUEUE_HOST_BUSY;
3205
3496343d
MC		 3206 out_tgt_busy:
3207 return SCSI_MLQUEUE_TARGET_BUSY;
3208
dea3101e 3209 out_fail_command:
3210 done(cmnd);
3211 return 0;
3212}
3213
f281233d
JG		 3214static DEF_SCSI_QCMD(lpfc_queuecommand)
3215
9bad7671 3216/**
3621a710 3217 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
9bad7671
JS		 3218 * @cmnd: Pointer to scsi_cmnd data structure.
3219 *
3220 * This routine aborts @cmnd pending in base driver.
3221 *
3222 * Return code :
3223 * 0x2003 - Error
3224 * 0x2002 - Success
3225 **/
dea3101e 3226static int
63c59c3b 3227lpfc_abort_handler(struct scsi_cmnd *cmnd)
dea3101e 3228{
2e0fef85
JS		 3229 struct Scsi_Host *shost = cmnd->device->host;
3230 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3231 struct lpfc_hba *phba = vport->phba;
0bd4ca25
JSEC		 3232 struct lpfc_iocbq *iocb;
3233 struct lpfc_iocbq *abtsiocb;
dea3101e 3234 struct lpfc_scsi_buf *lpfc_cmd;
dea3101e 3235 IOCB_t *cmd, *icmd;
0bd4ca25 3236 int ret = SUCCESS;
fa61a54e 3237 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
dea3101e 3238
589a52d6
JS		 3239 ret = fc_block_scsi_eh(cmnd);
3240 if (ret)
3241 return ret;
0bd4ca25 3242 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
eee8877e
JS		 3243 if (!lpfc_cmd) {
3244 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3245 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
5cd049a5
CH		 3246 "x%x ID %d LUN %d\n",
3247 ret, cmnd->device->id, cmnd->device->lun);
eee8877e
JS		 3248 return SUCCESS;
3249 }
dea3101e 3250
0bd4ca25
JSEC		 3251 /*
3252 * If pCmd field of the corresponding lpfc_scsi_buf structure
3253 * points to a different SCSI command, then the driver has
3254 * already completed this command, but the midlayer did not
3255 * see the completion before the eh fired. Just return
3256 * SUCCESS.
3257 */
3258 iocb = &lpfc_cmd->cur_iocbq;
3259 if (lpfc_cmd->pCmd != cmnd)
3260 goto out;
dea3101e 3261
0bd4ca25 3262 BUG_ON(iocb->context1 != lpfc_cmd);
dea3101e 3263
0bd4ca25
JSEC		 3264 abtsiocb = lpfc_sli_get_iocbq(phba);
3265 if (abtsiocb == NULL) {
3266 ret = FAILED;
dea3101e 3267 goto out;
3268 }
3269
dea3101e 3270 /*
0bd4ca25
JSEC		 3271 * The scsi command can not be in txq and it is in flight because the
3272 * pCmd is still pointig at the SCSI command we have to abort. There
3273 * is no need to search the txcmplq. Just send an abort to the FW.
dea3101e 3274 */
dea3101e 3275
0bd4ca25
JSEC		 3276 cmd = &iocb->iocb;
3277 icmd = &abtsiocb->iocb;
3278 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3279 icmd->un.acxri.abortContextTag = cmd->ulpContext;
3772a991
JS		 3280 if (phba->sli_rev == LPFC_SLI_REV4)
3281 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3282 else
3283 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
dea3101e 3284
0bd4ca25
JSEC		 3285 icmd->ulpLe = 1;
3286 icmd->ulpClass = cmd->ulpClass;
5ffc266e
JS		 3287
3288 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3289 abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
341af102 3290 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
5ffc266e 3291
2e0fef85 3292 if (lpfc_is_link_up(phba))
0bd4ca25
JSEC		 3293 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3294 else
3295 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
dea3101e 3296
0bd4ca25 3297 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
2e0fef85 3298 abtsiocb->vport = vport;
3772a991
JS		 3299 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3300 IOCB_ERROR) {
0bd4ca25
JSEC		 3301 lpfc_sli_release_iocbq(phba, abtsiocb);
3302 ret = FAILED;
3303 goto out;
3304 }
dea3101e 3305
875fbdfe 3306 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
45ed1190
JS		 3307 lpfc_sli_handle_fast_ring_event(phba,
3308 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
875fbdfe 3309
fa61a54e 3310 lpfc_cmd->waitq = &waitq;
0bd4ca25 3311 /* Wait for abort to complete */
fa61a54e
JS		 3312 wait_event_timeout(waitq,
3313 (lpfc_cmd->pCmd != cmnd),
3314 (2*vport->cfg_devloss_tmo*HZ));
875fbdfe 3315
fa61a54e
JS		 3316 spin_lock_irq(shost->host_lock);
3317 lpfc_cmd->waitq = NULL;
3318 spin_unlock_irq(shost->host_lock);
dea3101e 3319
0bd4ca25
JSEC		 3320 if (lpfc_cmd->pCmd == cmnd) {
3321 ret = FAILED;
e8b62011
JS		 3322 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3323 "0748 abort handler timed out waiting "
3324 "for abort to complete: ret %#x, ID %d, "
5cd049a5
CH		 3325 "LUN %d\n",
3326 ret, cmnd->device->id, cmnd->device->lun);
dea3101e 3327 }
3328
3329 out:
e8b62011
JS		 3330 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3331 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
5cd049a5
CH		 3332 "LUN %d\n", ret, cmnd->device->id,
3333 cmnd->device->lun);
63c59c3b 3334 return ret;
8fa728a2
JG		 3335}
3336
bbb9d180
JS		 3337static char *
3338lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3339{
3340 switch (task_mgmt_cmd) {
3341 case FCP_ABORT_TASK_SET:
3342 return "ABORT_TASK_SET";
3343 case FCP_CLEAR_TASK_SET:
3344 return "FCP_CLEAR_TASK_SET";
3345 case FCP_BUS_RESET:
3346 return "FCP_BUS_RESET";
3347 case FCP_LUN_RESET:
3348 return "FCP_LUN_RESET";
3349 case FCP_TARGET_RESET:
3350 return "FCP_TARGET_RESET";
3351 case FCP_CLEAR_ACA:
3352 return "FCP_CLEAR_ACA";
3353 case FCP_TERMINATE_TASK:
3354 return "FCP_TERMINATE_TASK";
3355 default:
3356 return "unknown";
3357 }
3358}
3359
9bad7671 3360/**
bbb9d180
JS		 3361 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3362 * @vport: The virtual port for which this call is being executed.
3363 * @rdata: Pointer to remote port local data
3364 * @tgt_id: Target ID of remote device.
3365 * @lun_id: Lun number for the TMF
3366 * @task_mgmt_cmd: type of TMF to send
9bad7671 3367 *
bbb9d180
JS		 3368 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3369 * a remote port.
9bad7671 3370 *
bbb9d180
JS		 3371 * Return Code:
3372 * 0x2003 - Error
3373 * 0x2002 - Success.
9bad7671 3374 **/
dea3101e 3375static int
bbb9d180
JS		 3376lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3377 unsigned tgt_id, unsigned int lun_id,
3378 uint8_t task_mgmt_cmd)
dea3101e 3379{
2e0fef85 3380 struct lpfc_hba *phba = vport->phba;
0bd4ca25 3381 struct lpfc_scsi_buf *lpfc_cmd;
bbb9d180
JS		 3382 struct lpfc_iocbq *iocbq;
3383 struct lpfc_iocbq *iocbqrsp;
5989b8d4 3384 struct lpfc_nodelist *pnode = rdata->pnode;
bbb9d180 3385 int ret;
915caaaf 3386 int status;
dea3101e 3387
5989b8d4 3388 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
915caaaf 3389 return FAILED;
bbb9d180 3390
19ca7609 3391 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
dea3101e 3392 if (lpfc_cmd == NULL)
915caaaf 3393 return FAILED;
dea3101e 3394 lpfc_cmd->timeout = 60;
0b18ac42 3395 lpfc_cmd->rdata = rdata;
dea3101e 3396
bbb9d180
JS		 3397 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3398 task_mgmt_cmd);
915caaaf
JS		 3399 if (!status) {
3400 lpfc_release_scsi_buf(phba, lpfc_cmd);
3401 return FAILED;
3402 }
dea3101e 3403
bbb9d180 3404 iocbq = &lpfc_cmd->cur_iocbq;
0bd4ca25 3405 iocbqrsp = lpfc_sli_get_iocbq(phba);
915caaaf
JS		 3406 if (iocbqrsp == NULL) {
3407 lpfc_release_scsi_buf(phba, lpfc_cmd);
3408 return FAILED;
3409 }
bbb9d180 3410
e8b62011 3411 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
bbb9d180 3412 "0702 Issue %s to TGT %d LUN %d "
6d368e53 3413 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
bbb9d180 3414 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
6d368e53
JS		 3415 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
3416 iocbq->iocb_flag);
bbb9d180 3417
3772a991 3418 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
915caaaf 3419 iocbq, iocbqrsp, lpfc_cmd->timeout);
bbb9d180
JS		 3420 if (status != IOCB_SUCCESS) {
3421 if (status == IOCB_TIMEDOUT) {
3422 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3423 ret = TIMEOUT_ERROR;
3424 } else
915caaaf 3425 ret = FAILED;
bbb9d180
JS		 3426 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3427 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
6d368e53
JS		 3428 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
3429 "iocb_flag x%x\n",
bbb9d180
JS		 3430 lpfc_taskmgmt_name(task_mgmt_cmd),
3431 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
6d368e53
JS		 3432 iocbqrsp->iocb.un.ulpWord[4],
3433 iocbq->iocb_flag);
2a9bf3d0
JS		 3434 } else if (status == IOCB_BUSY)
3435 ret = FAILED;
3436 else
bbb9d180
JS		 3437 ret = SUCCESS;
3438
6175c02a 3439 lpfc_sli_release_iocbq(phba, iocbqrsp);
bbb9d180
JS		 3440
3441 if (ret != TIMEOUT_ERROR)
3442 lpfc_release_scsi_buf(phba, lpfc_cmd);
3443
3444 return ret;
3445}
3446
3447/**
3448 * lpfc_chk_tgt_mapped -
3449 * @vport: The virtual port to check on
3450 * @cmnd: Pointer to scsi_cmnd data structure.
3451 *
3452 * This routine delays until the scsi target (aka rport) for the
3453 * command exists (is present and logged in) or we declare it non-existent.
3454 *
3455 * Return code :
3456 * 0x2003 - Error
3457 * 0x2002 - Success
3458 **/
3459static int
3460lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3461{
3462 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1c6f4ef5 3463 struct lpfc_nodelist *pnode;
bbb9d180
JS		 3464 unsigned long later;
3465
1c6f4ef5
JS		 3466 if (!rdata) {
3467 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3468 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3469 return FAILED;
3470 }
3471 pnode = rdata->pnode;
bbb9d180
JS		 3472 /*
3473 * If target is not in a MAPPED state, delay until
3474 * target is rediscovered or devloss timeout expires.
3475 */
3476 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3477 while (time_after(later, jiffies)) {
3478 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3479 return FAILED;
3480 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3481 return SUCCESS;
3482 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3483 rdata = cmnd->device->hostdata;
3484 if (!rdata)
3485 return FAILED;
3486 pnode = rdata->pnode;
3487 }
3488 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3489 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3490 return FAILED;
3491 return SUCCESS;
3492}
3493
3494/**
3495 * lpfc_reset_flush_io_context -
3496 * @vport: The virtual port (scsi_host) for the flush context
3497 * @tgt_id: If aborting by Target contect - specifies the target id
3498 * @lun_id: If aborting by Lun context - specifies the lun id
3499 * @context: specifies the context level to flush at.
3500 *
3501 * After a reset condition via TMF, we need to flush orphaned i/o
3502 * contexts from the adapter. This routine aborts any contexts
3503 * outstanding, then waits for their completions. The wait is
3504 * bounded by devloss_tmo though.
3505 *
3506 * Return code :
3507 * 0x2003 - Error
3508 * 0x2002 - Success
3509 **/
3510static int
3511lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3512 uint64_t lun_id, lpfc_ctx_cmd context)
3513{
3514 struct lpfc_hba *phba = vport->phba;
3515 unsigned long later;
3516 int cnt;
3517
3518 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
6175c02a 3519 if (cnt)
51ef4c26 3520 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
bbb9d180 3521 tgt_id, lun_id, context);
915caaaf
JS		 3522 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3523 while (time_after(later, jiffies) && cnt) {
3524 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
bbb9d180 3525 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
dea3101e 3526 }
dea3101e 3527 if (cnt) {
e8b62011 3528 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
bbb9d180
JS		 3529 "0724 I/O flush failure for context %s : cnt x%x\n",
3530 ((context == LPFC_CTX_LUN) ? "LUN" :
3531 ((context == LPFC_CTX_TGT) ? "TGT" :
3532 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3533 cnt);
3534 return FAILED;
dea3101e 3535 }
bbb9d180
JS		 3536 return SUCCESS;
3537}
3538
3539/**
3540 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3541 * @cmnd: Pointer to scsi_cmnd data structure.
3542 *
3543 * This routine does a device reset by sending a LUN_RESET task management
3544 * command.
3545 *
3546 * Return code :
3547 * 0x2003 - Error
3548 * 0x2002 - Success
3549 **/
3550static int
3551lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3552{
3553 struct Scsi_Host *shost = cmnd->device->host;
3554 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3555 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1c6f4ef5 3556 struct lpfc_nodelist *pnode;
bbb9d180
JS		 3557 unsigned tgt_id = cmnd->device->id;
3558 unsigned int lun_id = cmnd->device->lun;
3559 struct lpfc_scsi_event_header scsi_event;
3560 int status;
3561
1c6f4ef5
JS		 3562 if (!rdata) {
3563 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3564 "0798 Device Reset rport failure: rdata x%p\n", rdata);
3565 return FAILED;
3566 }
3567 pnode = rdata->pnode;
589a52d6
JS		 3568 status = fc_block_scsi_eh(cmnd);
3569 if (status)
3570 return status;
bbb9d180
JS		 3571
3572 status = lpfc_chk_tgt_mapped(vport, cmnd);
3573 if (status == FAILED) {
3574 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3575 "0721 Device Reset rport failure: rdata x%p\n", rdata);
3576 return FAILED;
3577 }
3578
3579 scsi_event.event_type = FC_REG_SCSI_EVENT;
3580 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3581 scsi_event.lun = lun_id;
3582 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3583 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3584
3585 fc_host_post_vendor_event(shost, fc_get_event_number(),
3586 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3587
3588 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3589 FCP_LUN_RESET);
3590
3591 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3592 "0713 SCSI layer issued Device Reset (%d, %d) "
3593 "return x%x\n", tgt_id, lun_id, status);
3594
3595 /*
3596 * We have to clean up i/o as : they may be orphaned by the TMF;
3597 * or if the TMF failed, they may be in an indeterminate state.
3598 * So, continue on.
3599 * We will report success if all the i/o aborts successfully.
3600 */
3601 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3602 LPFC_CTX_LUN);
3603 return status;
3604}
3605
3606/**
3607 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3608 * @cmnd: Pointer to scsi_cmnd data structure.
3609 *
3610 * This routine does a target reset by sending a TARGET_RESET task management
3611 * command.
3612 *
3613 * Return code :
3614 * 0x2003 - Error
3615 * 0x2002 - Success
3616 **/
3617static int
3618lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3619{
3620 struct Scsi_Host *shost = cmnd->device->host;
3621 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3622 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1c6f4ef5 3623 struct lpfc_nodelist *pnode;
bbb9d180
JS		 3624 unsigned tgt_id = cmnd->device->id;
3625 unsigned int lun_id = cmnd->device->lun;
3626 struct lpfc_scsi_event_header scsi_event;
3627 int status;
3628
1c6f4ef5
JS		 3629 if (!rdata) {
3630 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3631 "0799 Target Reset rport failure: rdata x%p\n", rdata);
3632 return FAILED;
3633 }
3634 pnode = rdata->pnode;
589a52d6
JS		 3635 status = fc_block_scsi_eh(cmnd);
3636 if (status)
3637 return status;
bbb9d180
JS		 3638
3639 status = lpfc_chk_tgt_mapped(vport, cmnd);
3640 if (status == FAILED) {
3641 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3642 "0722 Target Reset rport failure: rdata x%p\n", rdata);
3643 return FAILED;
3644 }
3645
3646 scsi_event.event_type = FC_REG_SCSI_EVENT;
3647 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3648 scsi_event.lun = 0;
3649 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3650 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3651
3652 fc_host_post_vendor_event(shost, fc_get_event_number(),
3653 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3654
3655 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3656 FCP_TARGET_RESET);
3657
3658 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3659 "0723 SCSI layer issued Target Reset (%d, %d) "
3660 "return x%x\n", tgt_id, lun_id, status);
3661
3662 /*
3663 * We have to clean up i/o as : they may be orphaned by the TMF;
3664 * or if the TMF failed, they may be in an indeterminate state.
3665 * So, continue on.
3666 * We will report success if all the i/o aborts successfully.
3667 */
3668 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3669 LPFC_CTX_TGT);
3670 return status;
dea3101e 3671}
3672
9bad7671 3673/**
3621a710 3674 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
9bad7671
JS		 3675 * @cmnd: Pointer to scsi_cmnd data structure.
3676 *
bbb9d180
JS		 3677 * This routine does target reset to all targets on @cmnd->device->host.
3678 * This emulates Parallel SCSI Bus Reset Semantics.
9bad7671 3679 *
bbb9d180
JS		 3680 * Return code :
3681 * 0x2003 - Error
3682 * 0x2002 - Success
9bad7671 3683 **/
94d0e7b8 3684static int
7054a606 3685lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
dea3101e 3686{
2e0fef85
JS		 3687 struct Scsi_Host *shost = cmnd->device->host;
3688 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
dea3101e 3689 struct lpfc_nodelist *ndlp = NULL;
ea2151b4 3690 struct lpfc_scsi_event_header scsi_event;
bbb9d180
JS		 3691 int match;
3692 int ret = SUCCESS, status, i;
ea2151b4
JS		 3693
3694 scsi_event.event_type = FC_REG_SCSI_EVENT;
3695 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3696 scsi_event.lun = 0;
3697 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3698 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3699
bbb9d180
JS		 3700 fc_host_post_vendor_event(shost, fc_get_event_number(),
3701 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
dea3101e 3702
bf08611b
JS		 3703 status = fc_block_scsi_eh(cmnd);
3704 if (status)
3705 return status;
bbb9d180 3706
dea3101e 3707 /*
3708 * Since the driver manages a single bus device, reset all
3709 * targets known to the driver. Should any target reset
3710 * fail, this routine returns failure to the midlayer.
3711 */
e17da18e 3712 for (i = 0; i < LPFC_MAX_TARGET; i++) {
685f0bf7 3713 /* Search for mapped node by target ID */
dea3101e 3714 match = 0;
2e0fef85
JS		 3715 spin_lock_irq(shost->host_lock);
3716 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
e47c9093
JS		 3717 if (!NLP_CHK_NODE_ACT(ndlp))
3718 continue;
685f0bf7 3719 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
915caaaf 3720 ndlp->nlp_sid == i &&
685f0bf7 3721 ndlp->rport) {
dea3101e 3722 match = 1;
3723 break;
3724 }
3725 }
2e0fef85 3726 spin_unlock_irq(shost->host_lock);
dea3101e 3727 if (!match)
3728 continue;
bbb9d180
JS		 3729
3730 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3731 i, 0, FCP_TARGET_RESET);
3732
3733 if (status != SUCCESS) {
e8b62011
JS		 3734 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3735 "0700 Bus Reset on target %d failed\n",
3736 i);
915caaaf 3737 ret = FAILED;
dea3101e 3738 }
3739 }
6175c02a 3740 /*
bbb9d180
JS		 3741 * We have to clean up i/o as : they may be orphaned by the TMFs
3742 * above; or if any of the TMFs failed, they may be in an
3743 * indeterminate state.
3744 * We will report success if all the i/o aborts successfully.
6175c02a 3745 */
bbb9d180
JS		 3746
3747 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3748 if (status != SUCCESS)
0bd4ca25 3749 ret = FAILED;
bbb9d180 3750
e8b62011
JS		 3751 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3752 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
dea3101e 3753 return ret;
3754}
3755
9bad7671 3756/**
3621a710 3757 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
9bad7671
JS		 3758 * @sdev: Pointer to scsi_device.
3759 *
3760 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
3761 * globally available list of scsi buffers. This routine also makes sure scsi
3762 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3763 * of scsi buffer exists for the lifetime of the driver.
3764 *
3765 * Return codes:
3766 * non-0 - Error
3767 * 0 - Success
3768 **/
dea3101e 3769static int
3770lpfc_slave_alloc(struct scsi_device *sdev)
3771{
2e0fef85
JS		 3772 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3773 struct lpfc_hba *phba = vport->phba;
19a7b4ae 3774 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3772a991 3775 uint32_t total = 0;
dea3101e 3776 uint32_t num_to_alloc = 0;
3772a991 3777 int num_allocated = 0;
d7c47992 3778 uint32_t sdev_cnt;
dea3101e 3779
19a7b4ae 3780 if (!rport || fc_remote_port_chkready(rport))
dea3101e 3781 return -ENXIO;
3782
19a7b4ae 3783 sdev->hostdata = rport->dd_data;
d7c47992 3784 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
dea3101e 3785
3786 /*
3787 * Populate the cmds_per_lun count scsi_bufs into this host's globally
3788 * available list of scsi buffers. Don't allocate more than the
a784efbf
JSEC		 3789 * HBA limit conveyed to the midlayer via the host structure. The
3790 * formula accounts for the lun_queue_depth + error handlers + 1
3791 * extra. This list of scsi bufs exists for the lifetime of the driver.
dea3101e 3792 */
3793 total = phba->total_scsi_bufs;
3de2a653 3794 num_to_alloc = vport->cfg_lun_queue_depth + 2;
92d7f7b0 3795
d7c47992
JS		 3796 /* If allocated buffers are enough do nothing */
3797 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3798 return 0;
3799
92d7f7b0
JS		 3800 /* Allow some exchanges to be available always to complete discovery */
3801 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
e8b62011
JS		 3802 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3803 "0704 At limitation of %d preallocated "
3804 "command buffers\n", total);
dea3101e 3805 return 0;
92d7f7b0
JS		 3806 /* Allow some exchanges to be available always to complete discovery */
3807 } else if (total + num_to_alloc >
3808 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
e8b62011
JS		 3809 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3810 "0705 Allocation request of %d "
3811 "command buffers will exceed max of %d. "
3812 "Reducing allocation request to %d.\n",
3813 num_to_alloc, phba->cfg_hba_queue_depth,
3814 (phba->cfg_hba_queue_depth - total));
dea3101e 3815 num_to_alloc = phba->cfg_hba_queue_depth - total;
3816 }
3772a991
JS		 3817 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3818 if (num_to_alloc != num_allocated) {
3819 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3820 "0708 Allocation request of %d "
3821 "command buffers did not succeed. "
3822 "Allocated %d buffers.\n",
3823 num_to_alloc, num_allocated);
dea3101e 3824 }
1c6f4ef5
JS		 3825 if (num_allocated > 0)
3826 phba->total_scsi_bufs += num_allocated;
dea3101e 3827 return 0;
3828}
3829
9bad7671 3830/**
3621a710 3831 * lpfc_slave_configure - scsi_host_template slave_configure entry point
9bad7671
JS		 3832 * @sdev: Pointer to scsi_device.
3833 *
3834 * This routine configures following items
3835 * - Tag command queuing support for @sdev if supported.
9bad7671
JS		 3836 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3837 *
3838 * Return codes:
3839 * 0 - Success
3840 **/
dea3101e 3841static int
3842lpfc_slave_configure(struct scsi_device *sdev)
3843{
2e0fef85
JS		 3844 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3845 struct lpfc_hba *phba = vport->phba;
dea3101e 3846
3847 if (sdev->tagged_supported)
3de2a653 3848 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
dea3101e 3849 else
3de2a653 3850 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
dea3101e 3851
875fbdfe 3852 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
45ed1190
JS		 3853 lpfc_sli_handle_fast_ring_event(phba,
3854 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
875fbdfe
JSEC		 3855 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3856 lpfc_poll_rearm_timer(phba);
3857 }
3858
dea3101e 3859 return 0;
3860}
3861
9bad7671 3862/**
3621a710 3863 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
9bad7671
JS		 3864 * @sdev: Pointer to scsi_device.
3865 *
3866 * This routine sets @sdev hostatdata filed to null.
3867 **/
dea3101e 3868static void
3869lpfc_slave_destroy(struct scsi_device *sdev)
3870{
d7c47992
JS		 3871 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3872 struct lpfc_hba *phba = vport->phba;
3873 atomic_dec(&phba->sdev_cnt);
dea3101e 3874 sdev->hostdata = NULL;
3875 return;
3876}
3877
92d7f7b0 3878
dea3101e 3879struct scsi_host_template lpfc_template = {
3880 .module = THIS_MODULE,
3881 .name = LPFC_DRIVER_NAME,
3882 .info = lpfc_info,
3883 .queuecommand = lpfc_queuecommand,
3884 .eh_abort_handler = lpfc_abort_handler,
bbb9d180
JS		 3885 .eh_device_reset_handler = lpfc_device_reset_handler,
3886 .eh_target_reset_handler = lpfc_target_reset_handler,
7054a606 3887 .eh_bus_reset_handler = lpfc_bus_reset_handler,
dea3101e 3888 .slave_alloc = lpfc_slave_alloc,
3889 .slave_configure = lpfc_slave_configure,
3890 .slave_destroy = lpfc_slave_destroy,
47a8617c 3891 .scan_finished = lpfc_scan_finished,
dea3101e 3892 .this_id = -1,
83108bd3 3893 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
dea3101e 3894 .cmd_per_lun = LPFC_CMD_PER_LUN,
3895 .use_clustering = ENABLE_CLUSTERING,
2e0fef85 3896 .shost_attrs = lpfc_hba_attrs,
564b2960 3897 .max_sectors = 0xFFFF,
f1c3b0fc 3898 .vendor_id = LPFC_NL_VENDOR_ID,
5ffc266e 3899 .change_queue_depth = lpfc_change_queue_depth,
dea3101e 3900};
3de2a653
JS		 3901
3902struct scsi_host_template lpfc_vport_template = {
3903 .module = THIS_MODULE,
3904 .name = LPFC_DRIVER_NAME,
3905 .info = lpfc_info,
3906 .queuecommand = lpfc_queuecommand,
3907 .eh_abort_handler = lpfc_abort_handler,
bbb9d180
JS		 3908 .eh_device_reset_handler = lpfc_device_reset_handler,
3909 .eh_target_reset_handler = lpfc_target_reset_handler,
3de2a653
JS		 3910 .eh_bus_reset_handler = lpfc_bus_reset_handler,
3911 .slave_alloc = lpfc_slave_alloc,
3912 .slave_configure = lpfc_slave_configure,
3913 .slave_destroy = lpfc_slave_destroy,
3914 .scan_finished = lpfc_scan_finished,
3915 .this_id = -1,
83108bd3 3916 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
3de2a653
JS		 3917 .cmd_per_lun = LPFC_CMD_PER_LUN,
3918 .use_clustering = ENABLE_CLUSTERING,
3919 .shost_attrs = lpfc_vport_attrs,
3920 .max_sectors = 0xFFFF,
5ffc266e 3921 .change_queue_depth = lpfc_change_queue_depth,
3de2a653 3922};
Linux kernel - Deliverables
This page took 0.925083 seconds and 5 git commands to generate.