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mic: vop: Fix use-after-free on remove
[linux/fpc-iii.git] / drivers / scsi / lpfc / lpfc_scsi.c
blobb4f1a840b3b4d70af69219ae27349120e02219f4
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2016 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
10 * *
11 * This program is free software; you can redistribute it and/or *
12 * modify it under the terms of version 2 of the GNU General *
13 * Public License as published by the Free Software Foundation. *
14 * This program is distributed in the hope that it will be useful. *
15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19 * TO BE LEGALLY INVALID. See the GNU General Public License for *
20 * more details, a copy of which can be found in the file COPYING *
21 * included with this package. *
22 *******************************************************************/
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/export.h>
27 #include <linux/delay.h>
28 #include <asm/unaligned.h>
29 #include <linux/t10-pi.h>
30 #include <linux/crc-t10dif.h>
31 #include <net/checksum.h>
32
33 #include <scsi/scsi.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/scsi_eh.h>
36 #include <scsi/scsi_host.h>
37 #include <scsi/scsi_tcq.h>
38 #include <scsi/scsi_transport_fc.h>
39
40 #include "lpfc_version.h"
41 #include "lpfc_hw4.h"
42 #include "lpfc_hw.h"
43 #include "lpfc_sli.h"
44 #include "lpfc_sli4.h"
45 #include "lpfc_nl.h"
46 #include "lpfc_disc.h"
47 #include "lpfc.h"
48 #include "lpfc_scsi.h"
49 #include "lpfc_logmsg.h"
50 #include "lpfc_crtn.h"
51 #include "lpfc_vport.h"
52
53 #define LPFC_RESET_WAIT 2
54 #define LPFC_ABORT_WAIT 2
55
56 int _dump_buf_done = 1;
57
58 static char *dif_op_str[] = {
59 "PROT_NORMAL",
60 "PROT_READ_INSERT",
61 "PROT_WRITE_STRIP",
62 "PROT_READ_STRIP",
63 "PROT_WRITE_INSERT",
64 "PROT_READ_PASS",
65 "PROT_WRITE_PASS",
66 };
67
68 struct scsi_dif_tuple {
69 __be16 guard_tag; /* Checksum */
70 __be16 app_tag; /* Opaque storage */
71 __be32 ref_tag; /* Target LBA or indirect LBA */
72 };
73
74 static struct lpfc_rport_data *
75 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
76 {
77 struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
78
79 if (vport->phba->cfg_fof)
80 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
81 else
82 return (struct lpfc_rport_data *)sdev->hostdata;
83 }
84
85 static void
86 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
87 static void
88 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
89 static int
90 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
91
92 static void
93 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
94 {
95 void *src, *dst;
96 struct scatterlist *sgde = scsi_sglist(cmnd);
97
98 if (!_dump_buf_data) {
99 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
100 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
101 __func__);
102 return;
103 }
104
105
106 if (!sgde) {
107 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
108 "9051 BLKGRD: ERROR: data scatterlist is null\n");
109 return;
110 }
111
112 dst = (void *) _dump_buf_data;
113 while (sgde) {
114 src = sg_virt(sgde);
115 memcpy(dst, src, sgde->length);
116 dst += sgde->length;
117 sgde = sg_next(sgde);
118 }
119 }
120
121 static void
122 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
123 {
124 void *src, *dst;
125 struct scatterlist *sgde = scsi_prot_sglist(cmnd);
126
127 if (!_dump_buf_dif) {
128 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
129 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
130 __func__);
131 return;
132 }
133
134 if (!sgde) {
135 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
136 "9053 BLKGRD: ERROR: prot scatterlist is null\n");
137 return;
138 }
139
140 dst = _dump_buf_dif;
141 while (sgde) {
142 src = sg_virt(sgde);
143 memcpy(dst, src, sgde->length);
144 dst += sgde->length;
145 sgde = sg_next(sgde);
146 }
147 }
148
149 static inline unsigned
150 lpfc_cmd_blksize(struct scsi_cmnd *sc)
151 {
152 return sc->device->sector_size;
153 }
154
155 #define LPFC_CHECK_PROTECT_GUARD 1
156 #define LPFC_CHECK_PROTECT_REF 2
157 static inline unsigned
158 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
159 {
160 return 1;
161 }
162
163 static inline unsigned
164 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
165 {
166 if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
167 return 0;
168 if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
169 return 1;
170 return 0;
171 }
172
173 /**
174 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
175 * @phba: Pointer to HBA object.
176 * @lpfc_cmd: lpfc scsi command object pointer.
177 *
178 * This function is called from the lpfc_prep_task_mgmt_cmd function to
179 * set the last bit in the response sge entry.
180 **/
181 static void
182 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
183 struct lpfc_scsi_buf *lpfc_cmd)
184 {
185 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
186 if (sgl) {
187 sgl += 1;
188 sgl->word2 = le32_to_cpu(sgl->word2);
189 bf_set(lpfc_sli4_sge_last, sgl, 1);
190 sgl->word2 = cpu_to_le32(sgl->word2);
191 }
192 }
193
194 /**
195 * lpfc_update_stats - Update statistical data for the command completion
196 * @phba: Pointer to HBA object.
197 * @lpfc_cmd: lpfc scsi command object pointer.
198 *
199 * This function is called when there is a command completion and this
200 * function updates the statistical data for the command completion.
201 **/
202 static void
203 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
204 {
205 struct lpfc_rport_data *rdata;
206 struct lpfc_nodelist *pnode;
207 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
208 unsigned long flags;
209 struct Scsi_Host *shost = cmd->device->host;
210 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
211 unsigned long latency;
212 int i;
213
214 if (!vport->stat_data_enabled ||
215 vport->stat_data_blocked ||
216 (cmd->result))
217 return;
218
219 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
220 rdata = lpfc_cmd->rdata;
221 pnode = rdata->pnode;
222
223 spin_lock_irqsave(shost->host_lock, flags);
224 if (!pnode ||
225 !pnode->lat_data ||
226 (phba->bucket_type == LPFC_NO_BUCKET)) {
227 spin_unlock_irqrestore(shost->host_lock, flags);
228 return;
229 }
230
231 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
232 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
233 phba->bucket_step;
234 /* check array subscript bounds */
235 if (i < 0)
236 i = 0;
237 else if (i >= LPFC_MAX_BUCKET_COUNT)
238 i = LPFC_MAX_BUCKET_COUNT - 1;
239 } else {
240 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
241 if (latency <= (phba->bucket_base +
242 ((1<<i)*phba->bucket_step)))
243 break;
244 }
245
246 pnode->lat_data[i].cmd_count++;
247 spin_unlock_irqrestore(shost->host_lock, flags);
248 }
249
250 /**
251 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
252 * @phba: The Hba for which this call is being executed.
253 *
254 * This routine is called when there is resource error in driver or firmware.
255 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
256 * posts at most 1 event each second. This routine wakes up worker thread of
257 * @phba to process WORKER_RAM_DOWN_EVENT event.
258 *
259 * This routine should be called with no lock held.
260 **/
261 void
262 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
263 {
264 unsigned long flags;
265 uint32_t evt_posted;
266 unsigned long expires;
267
268 spin_lock_irqsave(&phba->hbalock, flags);
269 atomic_inc(&phba->num_rsrc_err);
270 phba->last_rsrc_error_time = jiffies;
271
272 expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
273 if (time_after(expires, jiffies)) {
274 spin_unlock_irqrestore(&phba->hbalock, flags);
275 return;
276 }
277
278 phba->last_ramp_down_time = jiffies;
279
280 spin_unlock_irqrestore(&phba->hbalock, flags);
281
282 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
283 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
284 if (!evt_posted)
285 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
286 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
287
288 if (!evt_posted)
289 lpfc_worker_wake_up(phba);
290 return;
291 }
292
293 /**
294 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
295 * @phba: The Hba for which this call is being executed.
296 *
297 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
298 * thread.This routine reduces queue depth for all scsi device on each vport
299 * associated with @phba.
300 **/
301 void
302 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
303 {
304 struct lpfc_vport **vports;
305 struct Scsi_Host *shost;
306 struct scsi_device *sdev;
307 unsigned long new_queue_depth;
308 unsigned long num_rsrc_err, num_cmd_success;
309 int i;
310
311 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
312 num_cmd_success = atomic_read(&phba->num_cmd_success);
313
314 /*
315 * The error and success command counters are global per
316 * driver instance. If another handler has already
317 * operated on this error event, just exit.
318 */
319 if (num_rsrc_err == 0)
320 return;
321
322 vports = lpfc_create_vport_work_array(phba);
323 if (vports != NULL)
324 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
325 shost = lpfc_shost_from_vport(vports[i]);
326 shost_for_each_device(sdev, shost) {
327 new_queue_depth =
328 sdev->queue_depth * num_rsrc_err /
329 (num_rsrc_err + num_cmd_success);
330 if (!new_queue_depth)
331 new_queue_depth = sdev->queue_depth - 1;
332 else
333 new_queue_depth = sdev->queue_depth -
334 new_queue_depth;
335 scsi_change_queue_depth(sdev, new_queue_depth);
336 }
337 }
338 lpfc_destroy_vport_work_array(phba, vports);
339 atomic_set(&phba->num_rsrc_err, 0);
340 atomic_set(&phba->num_cmd_success, 0);
341 }
342
343 /**
344 * lpfc_scsi_dev_block - set all scsi hosts to block state
345 * @phba: Pointer to HBA context object.
346 *
347 * This function walks vport list and set each SCSI host to block state
348 * by invoking fc_remote_port_delete() routine. This function is invoked
349 * with EEH when device's PCI slot has been permanently disabled.
350 **/
351 void
352 lpfc_scsi_dev_block(struct lpfc_hba *phba)
353 {
354 struct lpfc_vport **vports;
355 struct Scsi_Host *shost;
356 struct scsi_device *sdev;
357 struct fc_rport *rport;
358 int i;
359
360 vports = lpfc_create_vport_work_array(phba);
361 if (vports != NULL)
362 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
363 shost = lpfc_shost_from_vport(vports[i]);
364 shost_for_each_device(sdev, shost) {
365 rport = starget_to_rport(scsi_target(sdev));
366 fc_remote_port_delete(rport);
367 }
368 }
369 lpfc_destroy_vport_work_array(phba, vports);
370 }
371
372 /**
373 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
374 * @vport: The virtual port for which this call being executed.
375 * @num_to_allocate: The requested number of buffers to allocate.
376 *
377 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
378 * the scsi buffer contains all the necessary information needed to initiate
379 * a SCSI I/O. The non-DMAable buffer region contains information to build
380 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
381 * and the initial BPL. In addition to allocating memory, the FCP CMND and
382 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
383 *
384 * Return codes:
385 * int - number of scsi buffers that were allocated.
386 * 0 = failure, less than num_to_alloc is a partial failure.
387 **/
388 static int
389 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
390 {
391 struct lpfc_hba *phba = vport->phba;
392 struct lpfc_scsi_buf *psb;
393 struct ulp_bde64 *bpl;
394 IOCB_t *iocb;
395 dma_addr_t pdma_phys_fcp_cmd;
396 dma_addr_t pdma_phys_fcp_rsp;
397 dma_addr_t pdma_phys_bpl;
398 uint16_t iotag;
399 int bcnt, bpl_size;
400
401 bpl_size = phba->cfg_sg_dma_buf_size -
402 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
403
404 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
405 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
406 num_to_alloc, phba->cfg_sg_dma_buf_size,
407 (int)sizeof(struct fcp_cmnd),
408 (int)sizeof(struct fcp_rsp), bpl_size);
409
410 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
411 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
412 if (!psb)
413 break;
414
415 /*
416 * Get memory from the pci pool to map the virt space to pci
417 * bus space for an I/O. The DMA buffer includes space for the
418 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
419 * necessary to support the sg_tablesize.
420 */
421 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
422 GFP_KERNEL, &psb->dma_handle);
423 if (!psb->data) {
424 kfree(psb);
425 break;
426 }
427
428
429 /* Allocate iotag for psb->cur_iocbq. */
430 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
431 if (iotag == 0) {
432 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
433 psb->data, psb->dma_handle);
434 kfree(psb);
435 break;
436 }
437 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
438
439 psb->fcp_cmnd = psb->data;
440 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
441 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
442 sizeof(struct fcp_rsp);
443
444 /* Initialize local short-hand pointers. */
445 bpl = psb->fcp_bpl;
446 pdma_phys_fcp_cmd = psb->dma_handle;
447 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
448 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
449 sizeof(struct fcp_rsp);
450
451 /*
452 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
453 * are sg list bdes. Initialize the first two and leave the
454 * rest for queuecommand.
455 */
456 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
457 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
458 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
459 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
460 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
461
462 /* Setup the physical region for the FCP RSP */
463 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
464 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
465 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
466 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
467 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
468
469 /*
470 * Since the IOCB for the FCP I/O is built into this
471 * lpfc_scsi_buf, initialize it with all known data now.
472 */
473 iocb = &psb->cur_iocbq.iocb;
474 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
475 if ((phba->sli_rev == 3) &&
476 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
477 /* fill in immediate fcp command BDE */
478 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
479 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
480 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
481 unsli3.fcp_ext.icd);
482 iocb->un.fcpi64.bdl.addrHigh = 0;
483 iocb->ulpBdeCount = 0;
484 iocb->ulpLe = 0;
485 /* fill in response BDE */
486 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
487 BUFF_TYPE_BDE_64;
488 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
489 sizeof(struct fcp_rsp);
490 iocb->unsli3.fcp_ext.rbde.addrLow =
491 putPaddrLow(pdma_phys_fcp_rsp);
492 iocb->unsli3.fcp_ext.rbde.addrHigh =
493 putPaddrHigh(pdma_phys_fcp_rsp);
494 } else {
495 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
496 iocb->un.fcpi64.bdl.bdeSize =
497 (2 * sizeof(struct ulp_bde64));
498 iocb->un.fcpi64.bdl.addrLow =
499 putPaddrLow(pdma_phys_bpl);
500 iocb->un.fcpi64.bdl.addrHigh =
501 putPaddrHigh(pdma_phys_bpl);
502 iocb->ulpBdeCount = 1;
503 iocb->ulpLe = 1;
504 }
505 iocb->ulpClass = CLASS3;
506 psb->status = IOSTAT_SUCCESS;
507 /* Put it back into the SCSI buffer list */
508 psb->cur_iocbq.context1 = psb;
509 lpfc_release_scsi_buf_s3(phba, psb);
510
511 }
512
513 return bcnt;
514 }
515
516 /**
517 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
518 * @vport: pointer to lpfc vport data structure.
519 *
520 * This routine is invoked by the vport cleanup for deletions and the cleanup
521 * for an ndlp on removal.
522 **/
523 void
524 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
525 {
526 struct lpfc_hba *phba = vport->phba;
527 struct lpfc_scsi_buf *psb, *next_psb;
528 unsigned long iflag = 0;
529
530 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
531 return;
532 spin_lock_irqsave(&phba->hbalock, iflag);
533 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
534 list_for_each_entry_safe(psb, next_psb,
535 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
536 if (psb->rdata && psb->rdata->pnode
537 && psb->rdata->pnode->vport == vport)
538 psb->rdata = NULL;
539 }
540 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
541 spin_unlock_irqrestore(&phba->hbalock, iflag);
542 }
543
544 /**
545 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
546 * @phba: pointer to lpfc hba data structure.
547 * @axri: pointer to the fcp xri abort wcqe structure.
548 *
549 * This routine is invoked by the worker thread to process a SLI4 fast-path
550 * FCP aborted xri.
551 **/
552 void
553 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
554 struct sli4_wcqe_xri_aborted *axri)
555 {
556 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
557 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
558 struct lpfc_scsi_buf *psb, *next_psb;
559 unsigned long iflag = 0;
560 struct lpfc_iocbq *iocbq;
561 int i;
562 struct lpfc_nodelist *ndlp;
563 int rrq_empty = 0;
564 struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
565
566 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
567 return;
568 spin_lock_irqsave(&phba->hbalock, iflag);
569 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
570 list_for_each_entry_safe(psb, next_psb,
571 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
572 if (psb->cur_iocbq.sli4_xritag == xri) {
573 list_del(&psb->list);
574 psb->exch_busy = 0;
575 psb->status = IOSTAT_SUCCESS;
576 spin_unlock(
577 &phba->sli4_hba.abts_scsi_buf_list_lock);
578 if (psb->rdata && psb->rdata->pnode)
579 ndlp = psb->rdata->pnode;
580 else
581 ndlp = NULL;
582
583 rrq_empty = list_empty(&phba->active_rrq_list);
584 spin_unlock_irqrestore(&phba->hbalock, iflag);
585 if (ndlp) {
586 lpfc_set_rrq_active(phba, ndlp,
587 psb->cur_iocbq.sli4_lxritag, rxid, 1);
588 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
589 }
590 lpfc_release_scsi_buf_s4(phba, psb);
591 if (rrq_empty)
592 lpfc_worker_wake_up(phba);
593 return;
594 }
595 }
596 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
597 for (i = 1; i <= phba->sli.last_iotag; i++) {
598 iocbq = phba->sli.iocbq_lookup[i];
599
600 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
601 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
602 continue;
603 if (iocbq->sli4_xritag != xri)
604 continue;
605 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
606 psb->exch_busy = 0;
607 spin_unlock_irqrestore(&phba->hbalock, iflag);
608 if (!list_empty(&pring->txq))
609 lpfc_worker_wake_up(phba);
610 return;
611
612 }
613 spin_unlock_irqrestore(&phba->hbalock, iflag);
614 }
615
616 /**
617 * lpfc_sli4_post_scsi_sgl_list - Post blocks of scsi buffer sgls from a list
618 * @phba: pointer to lpfc hba data structure.
619 * @post_sblist: pointer to the scsi buffer list.
620 *
621 * This routine walks a list of scsi buffers that was passed in. It attempts
622 * to construct blocks of scsi buffer sgls which contains contiguous xris and
623 * uses the non-embedded SGL block post mailbox commands to post to the port.
624 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
625 * embedded SGL post mailbox command for posting. The @post_sblist passed in
626 * must be local list, thus no lock is needed when manipulate the list.
627 *
628 * Returns: 0 = failure, non-zero number of successfully posted buffers.
629 **/
630 static int
631 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
632 struct list_head *post_sblist, int sb_count)
633 {
634 struct lpfc_scsi_buf *psb, *psb_next;
635 int status, sgl_size;
636 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
637 dma_addr_t pdma_phys_bpl1;
638 int last_xritag = NO_XRI;
639 LIST_HEAD(prep_sblist);
640 LIST_HEAD(blck_sblist);
641 LIST_HEAD(scsi_sblist);
642
643 /* sanity check */
644 if (sb_count <= 0)
645 return -EINVAL;
646
647 sgl_size = phba->cfg_sg_dma_buf_size -
648 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
649
650 list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
651 list_del_init(&psb->list);
652 block_cnt++;
653 if ((last_xritag != NO_XRI) &&
654 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
655 /* a hole in xri block, form a sgl posting block */
656 list_splice_init(&prep_sblist, &blck_sblist);
657 post_cnt = block_cnt - 1;
658 /* prepare list for next posting block */
659 list_add_tail(&psb->list, &prep_sblist);
660 block_cnt = 1;
661 } else {
662 /* prepare list for next posting block */
663 list_add_tail(&psb->list, &prep_sblist);
664 /* enough sgls for non-embed sgl mbox command */
665 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
666 list_splice_init(&prep_sblist, &blck_sblist);
667 post_cnt = block_cnt;
668 block_cnt = 0;
669 }
670 }
671 num_posting++;
672 last_xritag = psb->cur_iocbq.sli4_xritag;
673
674 /* end of repost sgl list condition for SCSI buffers */
675 if (num_posting == sb_count) {
676 if (post_cnt == 0) {
677 /* last sgl posting block */
678 list_splice_init(&prep_sblist, &blck_sblist);
679 post_cnt = block_cnt;
680 } else if (block_cnt == 1) {
681 /* last single sgl with non-contiguous xri */
682 if (sgl_size > SGL_PAGE_SIZE)
683 pdma_phys_bpl1 = psb->dma_phys_bpl +
684 SGL_PAGE_SIZE;
685 else
686 pdma_phys_bpl1 = 0;
687 status = lpfc_sli4_post_sgl(phba,
688 psb->dma_phys_bpl,
689 pdma_phys_bpl1,
690 psb->cur_iocbq.sli4_xritag);
691 if (status) {
692 /* failure, put on abort scsi list */
693 psb->exch_busy = 1;
694 } else {
695 /* success, put on SCSI buffer list */
696 psb->exch_busy = 0;
697 psb->status = IOSTAT_SUCCESS;
698 num_posted++;
699 }
700 /* success, put on SCSI buffer sgl list */
701 list_add_tail(&psb->list, &scsi_sblist);
702 }
703 }
704
705 /* continue until a nembed page worth of sgls */
706 if (post_cnt == 0)
707 continue;
708
709 /* post block of SCSI buffer list sgls */
710 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
711 post_cnt);
712
713 /* don't reset xirtag due to hole in xri block */
714 if (block_cnt == 0)
715 last_xritag = NO_XRI;
716
717 /* reset SCSI buffer post count for next round of posting */
718 post_cnt = 0;
719
720 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
721 while (!list_empty(&blck_sblist)) {
722 list_remove_head(&blck_sblist, psb,
723 struct lpfc_scsi_buf, list);
724 if (status) {
725 /* failure, put on abort scsi list */
726 psb->exch_busy = 1;
727 } else {
728 /* success, put on SCSI buffer list */
729 psb->exch_busy = 0;
730 psb->status = IOSTAT_SUCCESS;
731 num_posted++;
732 }
733 list_add_tail(&psb->list, &scsi_sblist);
734 }
735 }
736 /* Push SCSI buffers with sgl posted to the availble list */
737 while (!list_empty(&scsi_sblist)) {
738 list_remove_head(&scsi_sblist, psb,
739 struct lpfc_scsi_buf, list);
740 lpfc_release_scsi_buf_s4(phba, psb);
741 }
742 return num_posted;
743 }
744
745 /**
746 * lpfc_sli4_repost_scsi_sgl_list - Repost all the allocated scsi buffer sgls
747 * @phba: pointer to lpfc hba data structure.
748 *
749 * This routine walks the list of scsi buffers that have been allocated and
750 * repost them to the port by using SGL block post. This is needed after a
751 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
752 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
753 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
754 *
755 * Returns: 0 = success, non-zero failure.
756 **/
757 int
758 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
759 {
760 LIST_HEAD(post_sblist);
761 int num_posted, rc = 0;
762
763 /* get all SCSI buffers need to repost to a local list */
764 spin_lock_irq(&phba->scsi_buf_list_get_lock);
765 spin_lock(&phba->scsi_buf_list_put_lock);
766 list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
767 list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
768 spin_unlock(&phba->scsi_buf_list_put_lock);
769 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
770
771 /* post the list of scsi buffer sgls to port if available */
772 if (!list_empty(&post_sblist)) {
773 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
774 phba->sli4_hba.scsi_xri_cnt);
775 /* failed to post any scsi buffer, return error */
776 if (num_posted == 0)
777 rc = -EIO;
778 }
779 return rc;
780 }
781
782 /**
783 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
784 * @vport: The virtual port for which this call being executed.
785 * @num_to_allocate: The requested number of buffers to allocate.
786 *
787 * This routine allocates scsi buffers for device with SLI-4 interface spec,
788 * the scsi buffer contains all the necessary information needed to initiate
789 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
790 * them on a list, it post them to the port by using SGL block post.
791 *
792 * Return codes:
793 * int - number of scsi buffers that were allocated and posted.
794 * 0 = failure, less than num_to_alloc is a partial failure.
795 **/
796 static int
797 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
798 {
799 struct lpfc_hba *phba = vport->phba;
800 struct lpfc_scsi_buf *psb;
801 struct sli4_sge *sgl;
802 IOCB_t *iocb;
803 dma_addr_t pdma_phys_fcp_cmd;
804 dma_addr_t pdma_phys_fcp_rsp;
805 dma_addr_t pdma_phys_bpl;
806 uint16_t iotag, lxri = 0;
807 int bcnt, num_posted, sgl_size;
808 LIST_HEAD(prep_sblist);
809 LIST_HEAD(post_sblist);
810 LIST_HEAD(scsi_sblist);
811
812 sgl_size = phba->cfg_sg_dma_buf_size -
813 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
814
815 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
816 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
817 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
818 (int)sizeof(struct fcp_cmnd),
819 (int)sizeof(struct fcp_rsp));
820
821 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
822 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
823 if (!psb)
824 break;
825 /*
826 * Get memory from the pci pool to map the virt space to
827 * pci bus space for an I/O. The DMA buffer includes space
828 * for the struct fcp_cmnd, struct fcp_rsp and the number
829 * of bde's necessary to support the sg_tablesize.
830 */
831 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
832 GFP_KERNEL, &psb->dma_handle);
833 if (!psb->data) {
834 kfree(psb);
835 break;
836 }
837
838 /*
839 * 4K Page alignment is CRITICAL to BlockGuard, double check
840 * to be sure.
841 */
842 if ((phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
843 (((unsigned long)(psb->data) &
844 (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
845 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
846 "3369 Memory alignment error "
847 "addr=%lx\n",
848 (unsigned long)psb->data);
849 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
850 psb->data, psb->dma_handle);
851 kfree(psb);
852 break;
853 }
854
855
856 lxri = lpfc_sli4_next_xritag(phba);
857 if (lxri == NO_XRI) {
858 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
859 psb->data, psb->dma_handle);
860 kfree(psb);
861 break;
862 }
863
864 /* Allocate iotag for psb->cur_iocbq. */
865 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
866 if (iotag == 0) {
867 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
868 psb->data, psb->dma_handle);
869 kfree(psb);
870 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
871 "3368 Failed to allocate IOTAG for"
872 " XRI:0x%x\n", lxri);
873 lpfc_sli4_free_xri(phba, lxri);
874 break;
875 }
876 psb->cur_iocbq.sli4_lxritag = lxri;
877 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
878 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
879 psb->fcp_bpl = psb->data;
880 psb->fcp_cmnd = (psb->data + sgl_size);
881 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
882 sizeof(struct fcp_cmnd));
883
884 /* Initialize local short-hand pointers. */
885 sgl = (struct sli4_sge *)psb->fcp_bpl;
886 pdma_phys_bpl = psb->dma_handle;
887 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
888 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
889
890 /*
891 * The first two bdes are the FCP_CMD and FCP_RSP.
892 * The balance are sg list bdes. Initialize the
893 * first two and leave the rest for queuecommand.
894 */
895 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
896 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
897 sgl->word2 = le32_to_cpu(sgl->word2);
898 bf_set(lpfc_sli4_sge_last, sgl, 0);
899 sgl->word2 = cpu_to_le32(sgl->word2);
900 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
901 sgl++;
902
903 /* Setup the physical region for the FCP RSP */
904 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
905 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
906 sgl->word2 = le32_to_cpu(sgl->word2);
907 bf_set(lpfc_sli4_sge_last, sgl, 1);
908 sgl->word2 = cpu_to_le32(sgl->word2);
909 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
910
911 /*
912 * Since the IOCB for the FCP I/O is built into this
913 * lpfc_scsi_buf, initialize it with all known data now.
914 */
915 iocb = &psb->cur_iocbq.iocb;
916 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
917 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
918 /* setting the BLP size to 2 * sizeof BDE may not be correct.
919 * We are setting the bpl to point to out sgl. An sgl's
920 * entries are 16 bytes, a bpl entries are 12 bytes.
921 */
922 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
923 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
924 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
925 iocb->ulpBdeCount = 1;
926 iocb->ulpLe = 1;
927 iocb->ulpClass = CLASS3;
928 psb->cur_iocbq.context1 = psb;
929 psb->dma_phys_bpl = pdma_phys_bpl;
930
931 /* add the scsi buffer to a post list */
932 list_add_tail(&psb->list, &post_sblist);
933 spin_lock_irq(&phba->scsi_buf_list_get_lock);
934 phba->sli4_hba.scsi_xri_cnt++;
935 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
936 }
937 lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP,
938 "3021 Allocate %d out of %d requested new SCSI "
939 "buffers\n", bcnt, num_to_alloc);
940
941 /* post the list of scsi buffer sgls to port if available */
942 if (!list_empty(&post_sblist))
943 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
944 &post_sblist, bcnt);
945 else
946 num_posted = 0;
947
948 return num_posted;
949 }
950
951 /**
952 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
953 * @vport: The virtual port for which this call being executed.
954 * @num_to_allocate: The requested number of buffers to allocate.
955 *
956 * This routine wraps the actual SCSI buffer allocator function pointer from
957 * the lpfc_hba struct.
958 *
959 * Return codes:
960 * int - number of scsi buffers that were allocated.
961 * 0 = failure, less than num_to_alloc is a partial failure.
962 **/
963 static inline int
964 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
965 {
966 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
967 }
968
969 /**
970 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
971 * @phba: The HBA for which this call is being executed.
972 *
973 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
974 * and returns to caller.
975 *
976 * Return codes:
977 * NULL - Error
978 * Pointer to lpfc_scsi_buf - Success
979 **/
980 static struct lpfc_scsi_buf*
981 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
982 {
983 struct lpfc_scsi_buf * lpfc_cmd = NULL;
984 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
985 unsigned long iflag = 0;
986
987 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
988 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
989 list);
990 if (!lpfc_cmd) {
991 spin_lock(&phba->scsi_buf_list_put_lock);
992 list_splice(&phba->lpfc_scsi_buf_list_put,
993 &phba->lpfc_scsi_buf_list_get);
994 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
995 list_remove_head(scsi_buf_list_get, lpfc_cmd,
996 struct lpfc_scsi_buf, list);
997 spin_unlock(&phba->scsi_buf_list_put_lock);
998 }
999 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1000
1001 if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
1002 atomic_inc(&ndlp->cmd_pending);
1003 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
1004 }
1005 return lpfc_cmd;
1006 }
1007 /**
1008 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1009 * @phba: The HBA for which this call is being executed.
1010 *
1011 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1012 * and returns to caller.
1013 *
1014 * Return codes:
1015 * NULL - Error
1016 * Pointer to lpfc_scsi_buf - Success
1017 **/
1018 static struct lpfc_scsi_buf*
1019 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1020 {
1021 struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1022 unsigned long iflag = 0;
1023 int found = 0;
1024
1025 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1026 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1027 &phba->lpfc_scsi_buf_list_get, list) {
1028 if (lpfc_test_rrq_active(phba, ndlp,
1029 lpfc_cmd->cur_iocbq.sli4_lxritag))
1030 continue;
1031 list_del_init(&lpfc_cmd->list);
1032 found = 1;
1033 break;
1034 }
1035 if (!found) {
1036 spin_lock(&phba->scsi_buf_list_put_lock);
1037 list_splice(&phba->lpfc_scsi_buf_list_put,
1038 &phba->lpfc_scsi_buf_list_get);
1039 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1040 spin_unlock(&phba->scsi_buf_list_put_lock);
1041 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1042 &phba->lpfc_scsi_buf_list_get, list) {
1043 if (lpfc_test_rrq_active(
1044 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1045 continue;
1046 list_del_init(&lpfc_cmd->list);
1047 found = 1;
1048 break;
1049 }
1050 }
1051 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1052 if (!found)
1053 return NULL;
1054
1055 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1056 atomic_inc(&ndlp->cmd_pending);
1057 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
1058 }
1059 return lpfc_cmd;
1060 }
1061 /**
1062 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1063 * @phba: The HBA for which this call is being executed.
1064 *
1065 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1066 * and returns to caller.
1067 *
1068 * Return codes:
1069 * NULL - Error
1070 * Pointer to lpfc_scsi_buf - Success
1071 **/
1072 static struct lpfc_scsi_buf*
1073 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1074 {
1075 return phba->lpfc_get_scsi_buf(phba, ndlp);
1076 }
1077
1078 /**
1079 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1080 * @phba: The Hba for which this call is being executed.
1081 * @psb: The scsi buffer which is being released.
1082 *
1083 * This routine releases @psb scsi buffer by adding it to tail of @phba
1084 * lpfc_scsi_buf_list list.
1085 **/
1086 static void
1087 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1088 {
1089 unsigned long iflag = 0;
1090
1091 psb->seg_cnt = 0;
1092 psb->nonsg_phys = 0;
1093 psb->prot_seg_cnt = 0;
1094
1095 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1096 psb->pCmd = NULL;
1097 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1098 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1099 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1100 }
1101
1102 /**
1103 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1104 * @phba: The Hba for which this call is being executed.
1105 * @psb: The scsi buffer which is being released.
1106 *
1107 * This routine releases @psb scsi buffer by adding it to tail of @phba
1108 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1109 * and cannot be reused for at least RA_TOV amount of time if it was
1110 * aborted.
1111 **/
1112 static void
1113 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1114 {
1115 unsigned long iflag = 0;
1116
1117 psb->seg_cnt = 0;
1118 psb->nonsg_phys = 0;
1119 psb->prot_seg_cnt = 0;
1120
1121 if (psb->exch_busy) {
1122 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1123 iflag);
1124 psb->pCmd = NULL;
1125 list_add_tail(&psb->list,
1126 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1127 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1128 iflag);
1129 } else {
1130 psb->pCmd = NULL;
1131 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1132 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1133 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1134 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1135 }
1136 }
1137
1138 /**
1139 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1140 * @phba: The Hba for which this call is being executed.
1141 * @psb: The scsi buffer which is being released.
1142 *
1143 * This routine releases @psb scsi buffer by adding it to tail of @phba
1144 * lpfc_scsi_buf_list list.
1145 **/
1146 static void
1147 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1148 {
1149 if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
1150 atomic_dec(&psb->ndlp->cmd_pending);
1151
1152 psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
1153 phba->lpfc_release_scsi_buf(phba, psb);
1154 }
1155
1156 /**
1157 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1158 * @phba: The Hba for which this call is being executed.
1159 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1160 *
1161 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1162 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1163 * through sg elements and format the bde. This routine also initializes all
1164 * IOCB fields which are dependent on scsi command request buffer.
1165 *
1166 * Return codes:
1167 * 1 - Error
1168 * 0 - Success
1169 **/
1170 static int
1171 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1172 {
1173 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1174 struct scatterlist *sgel = NULL;
1175 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1176 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1177 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1178 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1179 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1180 dma_addr_t physaddr;
1181 uint32_t num_bde = 0;
1182 int nseg, datadir = scsi_cmnd->sc_data_direction;
1183
1184 /*
1185 * There are three possibilities here - use scatter-gather segment, use
1186 * the single mapping, or neither. Start the lpfc command prep by
1187 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1188 * data bde entry.
1189 */
1190 bpl += 2;
1191 if (scsi_sg_count(scsi_cmnd)) {
1192 /*
1193 * The driver stores the segment count returned from pci_map_sg
1194 * because this a count of dma-mappings used to map the use_sg
1195 * pages. They are not guaranteed to be the same for those
1196 * architectures that implement an IOMMU.
1197 */
1198
1199 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1200 scsi_sg_count(scsi_cmnd), datadir);
1201 if (unlikely(!nseg))
1202 return 1;
1203
1204 lpfc_cmd->seg_cnt = nseg;
1205 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1206 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1207 "9064 BLKGRD: %s: Too many sg segments from "
1208 "dma_map_sg. Config %d, seg_cnt %d\n",
1209 __func__, phba->cfg_sg_seg_cnt,
1210 lpfc_cmd->seg_cnt);
1211 lpfc_cmd->seg_cnt = 0;
1212 scsi_dma_unmap(scsi_cmnd);
1213 return 1;
1214 }
1215
1216 /*
1217 * The driver established a maximum scatter-gather segment count
1218 * during probe that limits the number of sg elements in any
1219 * single scsi command. Just run through the seg_cnt and format
1220 * the bde's.
1221 * When using SLI-3 the driver will try to fit all the BDEs into
1222 * the IOCB. If it can't then the BDEs get added to a BPL as it
1223 * does for SLI-2 mode.
1224 */
1225 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1226 physaddr = sg_dma_address(sgel);
1227 if (phba->sli_rev == 3 &&
1228 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1229 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1230 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1231 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1232 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1233 data_bde->addrLow = putPaddrLow(physaddr);
1234 data_bde->addrHigh = putPaddrHigh(physaddr);
1235 data_bde++;
1236 } else {
1237 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1238 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1239 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1240 bpl->addrLow =
1241 le32_to_cpu(putPaddrLow(physaddr));
1242 bpl->addrHigh =
1243 le32_to_cpu(putPaddrHigh(physaddr));
1244 bpl++;
1245 }
1246 }
1247 }
1248
1249 /*
1250 * Finish initializing those IOCB fields that are dependent on the
1251 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1252 * explicitly reinitialized and for SLI-3 the extended bde count is
1253 * explicitly reinitialized since all iocb memory resources are reused.
1254 */
1255 if (phba->sli_rev == 3 &&
1256 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1257 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1258 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1259 /*
1260 * The extended IOCB format can only fit 3 BDE or a BPL.
1261 * This I/O has more than 3 BDE so the 1st data bde will
1262 * be a BPL that is filled in here.
1263 */
1264 physaddr = lpfc_cmd->dma_handle;
1265 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1266 data_bde->tus.f.bdeSize = (num_bde *
1267 sizeof(struct ulp_bde64));
1268 physaddr += (sizeof(struct fcp_cmnd) +
1269 sizeof(struct fcp_rsp) +
1270 (2 * sizeof(struct ulp_bde64)));
1271 data_bde->addrHigh = putPaddrHigh(physaddr);
1272 data_bde->addrLow = putPaddrLow(physaddr);
1273 /* ebde count includes the response bde and data bpl */
1274 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1275 } else {
1276 /* ebde count includes the response bde and data bdes */
1277 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1278 }
1279 } else {
1280 iocb_cmd->un.fcpi64.bdl.bdeSize =
1281 ((num_bde + 2) * sizeof(struct ulp_bde64));
1282 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1283 }
1284 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1285
1286 /*
1287 * Due to difference in data length between DIF/non-DIF paths,
1288 * we need to set word 4 of IOCB here
1289 */
1290 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1291 return 0;
1292 }
1293
1294 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1295
1296 /* Return BG_ERR_INIT if error injection is detected by Initiator */
1297 #define BG_ERR_INIT 0x1
1298 /* Return BG_ERR_TGT if error injection is detected by Target */
1299 #define BG_ERR_TGT 0x2
1300 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1301 #define BG_ERR_SWAP 0x10
1302 /**
1303 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
1304 * error injection
1305 **/
1306 #define BG_ERR_CHECK 0x20
1307
1308 /**
1309 * lpfc_bg_err_inject - Determine if we should inject an error
1310 * @phba: The Hba for which this call is being executed.
1311 * @sc: The SCSI command to examine
1312 * @reftag: (out) BlockGuard reference tag for transmitted data
1313 * @apptag: (out) BlockGuard application tag for transmitted data
1314 * @new_guard (in) Value to replace CRC with if needed
1315 *
1316 * Returns BG_ERR_* bit mask or 0 if request ignored
1317 **/
1318 static int
1319 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1320 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1321 {
1322 struct scatterlist *sgpe; /* s/g prot entry */
1323 struct lpfc_scsi_buf *lpfc_cmd = NULL;
1324 struct scsi_dif_tuple *src = NULL;
1325 struct lpfc_nodelist *ndlp;
1326 struct lpfc_rport_data *rdata;
1327 uint32_t op = scsi_get_prot_op(sc);
1328 uint32_t blksize;
1329 uint32_t numblks;
1330 sector_t lba;
1331 int rc = 0;
1332 int blockoff = 0;
1333
1334 if (op == SCSI_PROT_NORMAL)
1335 return 0;
1336
1337 sgpe = scsi_prot_sglist(sc);
1338 lba = scsi_get_lba(sc);
1339
1340 /* First check if we need to match the LBA */
1341 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1342 blksize = lpfc_cmd_blksize(sc);
1343 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1344
1345 /* Make sure we have the right LBA if one is specified */
1346 if ((phba->lpfc_injerr_lba < lba) ||
1347 (phba->lpfc_injerr_lba >= (lba + numblks)))
1348 return 0;
1349 if (sgpe) {
1350 blockoff = phba->lpfc_injerr_lba - lba;
1351 numblks = sg_dma_len(sgpe) /
1352 sizeof(struct scsi_dif_tuple);
1353 if (numblks < blockoff)
1354 blockoff = numblks;
1355 }
1356 }
1357
1358 /* Next check if we need to match the remote NPortID or WWPN */
1359 rdata = lpfc_rport_data_from_scsi_device(sc->device);
1360 if (rdata && rdata->pnode) {
1361 ndlp = rdata->pnode;
1362
1363 /* Make sure we have the right NPortID if one is specified */
1364 if (phba->lpfc_injerr_nportid &&
1365 (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1366 return 0;
1367
1368 /*
1369 * Make sure we have the right WWPN if one is specified.
1370 * wwn[0] should be a non-zero NAA in a good WWPN.
1371 */
1372 if (phba->lpfc_injerr_wwpn.u.wwn[0] &&
1373 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1374 sizeof(struct lpfc_name)) != 0))
1375 return 0;
1376 }
1377
1378 /* Setup a ptr to the protection data if the SCSI host provides it */
1379 if (sgpe) {
1380 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1381 src += blockoff;
1382 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1383 }
1384
1385 /* Should we change the Reference Tag */
1386 if (reftag) {
1387 if (phba->lpfc_injerr_wref_cnt) {
1388 switch (op) {
1389 case SCSI_PROT_WRITE_PASS:
1390 if (src) {
1391 /*
1392 * For WRITE_PASS, force the error
1393 * to be sent on the wire. It should
1394 * be detected by the Target.
1395 * If blockoff != 0 error will be
1396 * inserted in middle of the IO.
1397 */
1398
1399 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1400 "9076 BLKGRD: Injecting reftag error: "
1401 "write lba x%lx + x%x oldrefTag x%x\n",
1402 (unsigned long)lba, blockoff,
1403 be32_to_cpu(src->ref_tag));
1404
1405 /*
1406 * Save the old ref_tag so we can
1407 * restore it on completion.
1408 */
1409 if (lpfc_cmd) {
1410 lpfc_cmd->prot_data_type =
1411 LPFC_INJERR_REFTAG;
1412 lpfc_cmd->prot_data_segment =
1413 src;
1414 lpfc_cmd->prot_data =
1415 src->ref_tag;
1416 }
1417 src->ref_tag = cpu_to_be32(0xDEADBEEF);
1418 phba->lpfc_injerr_wref_cnt--;
1419 if (phba->lpfc_injerr_wref_cnt == 0) {
1420 phba->lpfc_injerr_nportid = 0;
1421 phba->lpfc_injerr_lba =
1422 LPFC_INJERR_LBA_OFF;
1423 memset(&phba->lpfc_injerr_wwpn,
1424 0, sizeof(struct lpfc_name));
1425 }
1426 rc = BG_ERR_TGT | BG_ERR_CHECK;
1427
1428 break;
1429 }
1430 /* Drop thru */
1431 case SCSI_PROT_WRITE_INSERT:
1432 /*
1433 * For WRITE_INSERT, force the error
1434 * to be sent on the wire. It should be
1435 * detected by the Target.
1436 */
1437 /* DEADBEEF will be the reftag on the wire */
1438 *reftag = 0xDEADBEEF;
1439 phba->lpfc_injerr_wref_cnt--;
1440 if (phba->lpfc_injerr_wref_cnt == 0) {
1441 phba->lpfc_injerr_nportid = 0;
1442 phba->lpfc_injerr_lba =
1443 LPFC_INJERR_LBA_OFF;
1444 memset(&phba->lpfc_injerr_wwpn,
1445 0, sizeof(struct lpfc_name));
1446 }
1447 rc = BG_ERR_TGT | BG_ERR_CHECK;
1448
1449 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1450 "9078 BLKGRD: Injecting reftag error: "
1451 "write lba x%lx\n", (unsigned long)lba);
1452 break;
1453 case SCSI_PROT_WRITE_STRIP:
1454 /*
1455 * For WRITE_STRIP and WRITE_PASS,
1456 * force the error on data
1457 * being copied from SLI-Host to SLI-Port.
1458 */
1459 *reftag = 0xDEADBEEF;
1460 phba->lpfc_injerr_wref_cnt--;
1461 if (phba->lpfc_injerr_wref_cnt == 0) {
1462 phba->lpfc_injerr_nportid = 0;
1463 phba->lpfc_injerr_lba =
1464 LPFC_INJERR_LBA_OFF;
1465 memset(&phba->lpfc_injerr_wwpn,
1466 0, sizeof(struct lpfc_name));
1467 }
1468 rc = BG_ERR_INIT;
1469
1470 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1471 "9077 BLKGRD: Injecting reftag error: "
1472 "write lba x%lx\n", (unsigned long)lba);
1473 break;
1474 }
1475 }
1476 if (phba->lpfc_injerr_rref_cnt) {
1477 switch (op) {
1478 case SCSI_PROT_READ_INSERT:
1479 case SCSI_PROT_READ_STRIP:
1480 case SCSI_PROT_READ_PASS:
1481 /*
1482 * For READ_STRIP and READ_PASS, force the
1483 * error on data being read off the wire. It
1484 * should force an IO error to the driver.
1485 */
1486 *reftag = 0xDEADBEEF;
1487 phba->lpfc_injerr_rref_cnt--;
1488 if (phba->lpfc_injerr_rref_cnt == 0) {
1489 phba->lpfc_injerr_nportid = 0;
1490 phba->lpfc_injerr_lba =
1491 LPFC_INJERR_LBA_OFF;
1492 memset(&phba->lpfc_injerr_wwpn,
1493 0, sizeof(struct lpfc_name));
1494 }
1495 rc = BG_ERR_INIT;
1496
1497 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1498 "9079 BLKGRD: Injecting reftag error: "
1499 "read lba x%lx\n", (unsigned long)lba);
1500 break;
1501 }
1502 }
1503 }
1504
1505 /* Should we change the Application Tag */
1506 if (apptag) {
1507 if (phba->lpfc_injerr_wapp_cnt) {
1508 switch (op) {
1509 case SCSI_PROT_WRITE_PASS:
1510 if (src) {
1511 /*
1512 * For WRITE_PASS, force the error
1513 * to be sent on the wire. It should
1514 * be detected by the Target.
1515 * If blockoff != 0 error will be
1516 * inserted in middle of the IO.
1517 */
1518
1519 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1520 "9080 BLKGRD: Injecting apptag error: "
1521 "write lba x%lx + x%x oldappTag x%x\n",
1522 (unsigned long)lba, blockoff,
1523 be16_to_cpu(src->app_tag));
1524
1525 /*
1526 * Save the old app_tag so we can
1527 * restore it on completion.
1528 */
1529 if (lpfc_cmd) {
1530 lpfc_cmd->prot_data_type =
1531 LPFC_INJERR_APPTAG;
1532 lpfc_cmd->prot_data_segment =
1533 src;
1534 lpfc_cmd->prot_data =
1535 src->app_tag;
1536 }
1537 src->app_tag = cpu_to_be16(0xDEAD);
1538 phba->lpfc_injerr_wapp_cnt--;
1539 if (phba->lpfc_injerr_wapp_cnt == 0) {
1540 phba->lpfc_injerr_nportid = 0;
1541 phba->lpfc_injerr_lba =
1542 LPFC_INJERR_LBA_OFF;
1543 memset(&phba->lpfc_injerr_wwpn,
1544 0, sizeof(struct lpfc_name));
1545 }
1546 rc = BG_ERR_TGT | BG_ERR_CHECK;
1547 break;
1548 }
1549 /* Drop thru */
1550 case SCSI_PROT_WRITE_INSERT:
1551 /*
1552 * For WRITE_INSERT, force the
1553 * error to be sent on the wire. It should be
1554 * detected by the Target.
1555 */
1556 /* DEAD will be the apptag on the wire */
1557 *apptag = 0xDEAD;
1558 phba->lpfc_injerr_wapp_cnt--;
1559 if (phba->lpfc_injerr_wapp_cnt == 0) {
1560 phba->lpfc_injerr_nportid = 0;
1561 phba->lpfc_injerr_lba =
1562 LPFC_INJERR_LBA_OFF;
1563 memset(&phba->lpfc_injerr_wwpn,
1564 0, sizeof(struct lpfc_name));
1565 }
1566 rc = BG_ERR_TGT | BG_ERR_CHECK;
1567
1568 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1569 "0813 BLKGRD: Injecting apptag error: "
1570 "write lba x%lx\n", (unsigned long)lba);
1571 break;
1572 case SCSI_PROT_WRITE_STRIP:
1573 /*
1574 * For WRITE_STRIP and WRITE_PASS,
1575 * force the error on data
1576 * being copied from SLI-Host to SLI-Port.
1577 */
1578 *apptag = 0xDEAD;
1579 phba->lpfc_injerr_wapp_cnt--;
1580 if (phba->lpfc_injerr_wapp_cnt == 0) {
1581 phba->lpfc_injerr_nportid = 0;
1582 phba->lpfc_injerr_lba =
1583 LPFC_INJERR_LBA_OFF;
1584 memset(&phba->lpfc_injerr_wwpn,
1585 0, sizeof(struct lpfc_name));
1586 }
1587 rc = BG_ERR_INIT;
1588
1589 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1590 "0812 BLKGRD: Injecting apptag error: "
1591 "write lba x%lx\n", (unsigned long)lba);
1592 break;
1593 }
1594 }
1595 if (phba->lpfc_injerr_rapp_cnt) {
1596 switch (op) {
1597 case SCSI_PROT_READ_INSERT:
1598 case SCSI_PROT_READ_STRIP:
1599 case SCSI_PROT_READ_PASS:
1600 /*
1601 * For READ_STRIP and READ_PASS, force the
1602 * error on data being read off the wire. It
1603 * should force an IO error to the driver.
1604 */
1605 *apptag = 0xDEAD;
1606 phba->lpfc_injerr_rapp_cnt--;
1607 if (phba->lpfc_injerr_rapp_cnt == 0) {
1608 phba->lpfc_injerr_nportid = 0;
1609 phba->lpfc_injerr_lba =
1610 LPFC_INJERR_LBA_OFF;
1611 memset(&phba->lpfc_injerr_wwpn,
1612 0, sizeof(struct lpfc_name));
1613 }
1614 rc = BG_ERR_INIT;
1615
1616 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1617 "0814 BLKGRD: Injecting apptag error: "
1618 "read lba x%lx\n", (unsigned long)lba);
1619 break;
1620 }
1621 }
1622 }
1623
1624
1625 /* Should we change the Guard Tag */
1626 if (new_guard) {
1627 if (phba->lpfc_injerr_wgrd_cnt) {
1628 switch (op) {
1629 case SCSI_PROT_WRITE_PASS:
1630 rc = BG_ERR_CHECK;
1631 /* Drop thru */
1632
1633 case SCSI_PROT_WRITE_INSERT:
1634 /*
1635 * For WRITE_INSERT, force the
1636 * error to be sent on the wire. It should be
1637 * detected by the Target.
1638 */
1639 phba->lpfc_injerr_wgrd_cnt--;
1640 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1641 phba->lpfc_injerr_nportid = 0;
1642 phba->lpfc_injerr_lba =
1643 LPFC_INJERR_LBA_OFF;
1644 memset(&phba->lpfc_injerr_wwpn,
1645 0, sizeof(struct lpfc_name));
1646 }
1647
1648 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1649 /* Signals the caller to swap CRC->CSUM */
1650
1651 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1652 "0817 BLKGRD: Injecting guard error: "
1653 "write lba x%lx\n", (unsigned long)lba);
1654 break;
1655 case SCSI_PROT_WRITE_STRIP:
1656 /*
1657 * For WRITE_STRIP and WRITE_PASS,
1658 * force the error on data
1659 * being copied from SLI-Host to SLI-Port.
1660 */
1661 phba->lpfc_injerr_wgrd_cnt--;
1662 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1663 phba->lpfc_injerr_nportid = 0;
1664 phba->lpfc_injerr_lba =
1665 LPFC_INJERR_LBA_OFF;
1666 memset(&phba->lpfc_injerr_wwpn,
1667 0, sizeof(struct lpfc_name));
1668 }
1669
1670 rc = BG_ERR_INIT | BG_ERR_SWAP;
1671 /* Signals the caller to swap CRC->CSUM */
1672
1673 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1674 "0816 BLKGRD: Injecting guard error: "
1675 "write lba x%lx\n", (unsigned long)lba);
1676 break;
1677 }
1678 }
1679 if (phba->lpfc_injerr_rgrd_cnt) {
1680 switch (op) {
1681 case SCSI_PROT_READ_INSERT:
1682 case SCSI_PROT_READ_STRIP:
1683 case SCSI_PROT_READ_PASS:
1684 /*
1685 * For READ_STRIP and READ_PASS, force the
1686 * error on data being read off the wire. It
1687 * should force an IO error to the driver.
1688 */
1689 phba->lpfc_injerr_rgrd_cnt--;
1690 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1691 phba->lpfc_injerr_nportid = 0;
1692 phba->lpfc_injerr_lba =
1693 LPFC_INJERR_LBA_OFF;
1694 memset(&phba->lpfc_injerr_wwpn,
1695 0, sizeof(struct lpfc_name));
1696 }
1697
1698 rc = BG_ERR_INIT | BG_ERR_SWAP;
1699 /* Signals the caller to swap CRC->CSUM */
1700
1701 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1702 "0818 BLKGRD: Injecting guard error: "
1703 "read lba x%lx\n", (unsigned long)lba);
1704 }
1705 }
1706 }
1707
1708 return rc;
1709 }
1710 #endif
1711
1712 /**
1713 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1714 * the specified SCSI command.
1715 * @phba: The Hba for which this call is being executed.
1716 * @sc: The SCSI command to examine
1717 * @txopt: (out) BlockGuard operation for transmitted data
1718 * @rxopt: (out) BlockGuard operation for received data
1719 *
1720 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1721 *
1722 **/
1723 static int
1724 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1725 uint8_t *txop, uint8_t *rxop)
1726 {
1727 uint8_t ret = 0;
1728
1729 if (lpfc_cmd_guard_csum(sc)) {
1730 switch (scsi_get_prot_op(sc)) {
1731 case SCSI_PROT_READ_INSERT:
1732 case SCSI_PROT_WRITE_STRIP:
1733 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1734 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1735 break;
1736
1737 case SCSI_PROT_READ_STRIP:
1738 case SCSI_PROT_WRITE_INSERT:
1739 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1740 *txop = BG_OP_IN_NODIF_OUT_CRC;
1741 break;
1742
1743 case SCSI_PROT_READ_PASS:
1744 case SCSI_PROT_WRITE_PASS:
1745 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1746 *txop = BG_OP_IN_CSUM_OUT_CRC;
1747 break;
1748
1749 case SCSI_PROT_NORMAL:
1750 default:
1751 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1752 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1753 scsi_get_prot_op(sc));
1754 ret = 1;
1755 break;
1756
1757 }
1758 } else {
1759 switch (scsi_get_prot_op(sc)) {
1760 case SCSI_PROT_READ_STRIP:
1761 case SCSI_PROT_WRITE_INSERT:
1762 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1763 *txop = BG_OP_IN_NODIF_OUT_CRC;
1764 break;
1765
1766 case SCSI_PROT_READ_PASS:
1767 case SCSI_PROT_WRITE_PASS:
1768 *rxop = BG_OP_IN_CRC_OUT_CRC;
1769 *txop = BG_OP_IN_CRC_OUT_CRC;
1770 break;
1771
1772 case SCSI_PROT_READ_INSERT:
1773 case SCSI_PROT_WRITE_STRIP:
1774 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1775 *txop = BG_OP_IN_CRC_OUT_NODIF;
1776 break;
1777
1778 case SCSI_PROT_NORMAL:
1779 default:
1780 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1781 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1782 scsi_get_prot_op(sc));
1783 ret = 1;
1784 break;
1785 }
1786 }
1787
1788 return ret;
1789 }
1790
1791 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1792 /**
1793 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1794 * the specified SCSI command in order to force a guard tag error.
1795 * @phba: The Hba for which this call is being executed.
1796 * @sc: The SCSI command to examine
1797 * @txopt: (out) BlockGuard operation for transmitted data
1798 * @rxopt: (out) BlockGuard operation for received data
1799 *
1800 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1801 *
1802 **/
1803 static int
1804 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1805 uint8_t *txop, uint8_t *rxop)
1806 {
1807 uint8_t ret = 0;
1808
1809 if (lpfc_cmd_guard_csum(sc)) {
1810 switch (scsi_get_prot_op(sc)) {
1811 case SCSI_PROT_READ_INSERT:
1812 case SCSI_PROT_WRITE_STRIP:
1813 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1814 *txop = BG_OP_IN_CRC_OUT_NODIF;
1815 break;
1816
1817 case SCSI_PROT_READ_STRIP:
1818 case SCSI_PROT_WRITE_INSERT:
1819 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1820 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1821 break;
1822
1823 case SCSI_PROT_READ_PASS:
1824 case SCSI_PROT_WRITE_PASS:
1825 *rxop = BG_OP_IN_CSUM_OUT_CRC;
1826 *txop = BG_OP_IN_CRC_OUT_CSUM;
1827 break;
1828
1829 case SCSI_PROT_NORMAL:
1830 default:
1831 break;
1832
1833 }
1834 } else {
1835 switch (scsi_get_prot_op(sc)) {
1836 case SCSI_PROT_READ_STRIP:
1837 case SCSI_PROT_WRITE_INSERT:
1838 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1839 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1840 break;
1841
1842 case SCSI_PROT_READ_PASS:
1843 case SCSI_PROT_WRITE_PASS:
1844 *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1845 *txop = BG_OP_IN_CSUM_OUT_CSUM;
1846 break;
1847
1848 case SCSI_PROT_READ_INSERT:
1849 case SCSI_PROT_WRITE_STRIP:
1850 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1851 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1852 break;
1853
1854 case SCSI_PROT_NORMAL:
1855 default:
1856 break;
1857 }
1858 }
1859
1860 return ret;
1861 }
1862 #endif
1863
1864 /**
1865 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1866 * @phba: The Hba for which this call is being executed.
1867 * @sc: pointer to scsi command we're working on
1868 * @bpl: pointer to buffer list for protection groups
1869 * @datacnt: number of segments of data that have been dma mapped
1870 *
1871 * This function sets up BPL buffer list for protection groups of
1872 * type LPFC_PG_TYPE_NO_DIF
1873 *
1874 * This is usually used when the HBA is instructed to generate
1875 * DIFs and insert them into data stream (or strip DIF from
1876 * incoming data stream)
1877 *
1878 * The buffer list consists of just one protection group described
1879 * below:
1880 * +-------------------------+
1881 * start of prot group --> | PDE_5 |
1882 * +-------------------------+
1883 * | PDE_6 |
1884 * +-------------------------+
1885 * | Data BDE |
1886 * +-------------------------+
1887 * |more Data BDE's ... (opt)|
1888 * +-------------------------+
1889 *
1890 *
1891 * Note: Data s/g buffers have been dma mapped
1892 *
1893 * Returns the number of BDEs added to the BPL.
1894 **/
1895 static int
1896 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1897 struct ulp_bde64 *bpl, int datasegcnt)
1898 {
1899 struct scatterlist *sgde = NULL; /* s/g data entry */
1900 struct lpfc_pde5 *pde5 = NULL;
1901 struct lpfc_pde6 *pde6 = NULL;
1902 dma_addr_t physaddr;
1903 int i = 0, num_bde = 0, status;
1904 int datadir = sc->sc_data_direction;
1905 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1906 uint32_t rc;
1907 #endif
1908 uint32_t checking = 1;
1909 uint32_t reftag;
1910 uint8_t txop, rxop;
1911
1912 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1913 if (status)
1914 goto out;
1915
1916 /* extract some info from the scsi command for pde*/
1917 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1918
1919 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1920 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1921 if (rc) {
1922 if (rc & BG_ERR_SWAP)
1923 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1924 if (rc & BG_ERR_CHECK)
1925 checking = 0;
1926 }
1927 #endif
1928
1929 /* setup PDE5 with what we have */
1930 pde5 = (struct lpfc_pde5 *) bpl;
1931 memset(pde5, 0, sizeof(struct lpfc_pde5));
1932 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1933
1934 /* Endianness conversion if necessary for PDE5 */
1935 pde5->word0 = cpu_to_le32(pde5->word0);
1936 pde5->reftag = cpu_to_le32(reftag);
1937
1938 /* advance bpl and increment bde count */
1939 num_bde++;
1940 bpl++;
1941 pde6 = (struct lpfc_pde6 *) bpl;
1942
1943 /* setup PDE6 with the rest of the info */
1944 memset(pde6, 0, sizeof(struct lpfc_pde6));
1945 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1946 bf_set(pde6_optx, pde6, txop);
1947 bf_set(pde6_oprx, pde6, rxop);
1948
1949 /*
1950 * We only need to check the data on READs, for WRITEs
1951 * protection data is automatically generated, not checked.
1952 */
1953 if (datadir == DMA_FROM_DEVICE) {
1954 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1955 bf_set(pde6_ce, pde6, checking);
1956 else
1957 bf_set(pde6_ce, pde6, 0);
1958
1959 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1960 bf_set(pde6_re, pde6, checking);
1961 else
1962 bf_set(pde6_re, pde6, 0);
1963 }
1964 bf_set(pde6_ai, pde6, 1);
1965 bf_set(pde6_ae, pde6, 0);
1966 bf_set(pde6_apptagval, pde6, 0);
1967
1968 /* Endianness conversion if necessary for PDE6 */
1969 pde6->word0 = cpu_to_le32(pde6->word0);
1970 pde6->word1 = cpu_to_le32(pde6->word1);
1971 pde6->word2 = cpu_to_le32(pde6->word2);
1972
1973 /* advance bpl and increment bde count */
1974 num_bde++;
1975 bpl++;
1976
1977 /* assumption: caller has already run dma_map_sg on command data */
1978 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1979 physaddr = sg_dma_address(sgde);
1980 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1981 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1982 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1983 if (datadir == DMA_TO_DEVICE)
1984 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1985 else
1986 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1987 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1988 bpl++;
1989 num_bde++;
1990 }
1991
1992 out:
1993 return num_bde;
1994 }
1995
1996 /**
1997 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1998 * @phba: The Hba for which this call is being executed.
1999 * @sc: pointer to scsi command we're working on
2000 * @bpl: pointer to buffer list for protection groups
2001 * @datacnt: number of segments of data that have been dma mapped
2002 * @protcnt: number of segment of protection data that have been dma mapped
2003 *
2004 * This function sets up BPL buffer list for protection groups of
2005 * type LPFC_PG_TYPE_DIF
2006 *
2007 * This is usually used when DIFs are in their own buffers,
2008 * separate from the data. The HBA can then by instructed
2009 * to place the DIFs in the outgoing stream. For read operations,
2010 * The HBA could extract the DIFs and place it in DIF buffers.
2011 *
2012 * The buffer list for this type consists of one or more of the
2013 * protection groups described below:
2014 * +-------------------------+
2015 * start of first prot group --> | PDE_5 |
2016 * +-------------------------+
2017 * | PDE_6 |
2018 * +-------------------------+
2019 * | PDE_7 (Prot BDE) |
2020 * +-------------------------+
2021 * | Data BDE |
2022 * +-------------------------+
2023 * |more Data BDE's ... (opt)|
2024 * +-------------------------+
2025 * start of new prot group --> | PDE_5 |
2026 * +-------------------------+
2027 * | ... |
2028 * +-------------------------+
2029 *
2030 * Note: It is assumed that both data and protection s/g buffers have been
2031 * mapped for DMA
2032 *
2033 * Returns the number of BDEs added to the BPL.
2034 **/
2035 static int
2036 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2037 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2038 {
2039 struct scatterlist *sgde = NULL; /* s/g data entry */
2040 struct scatterlist *sgpe = NULL; /* s/g prot entry */
2041 struct lpfc_pde5 *pde5 = NULL;
2042 struct lpfc_pde6 *pde6 = NULL;
2043 struct lpfc_pde7 *pde7 = NULL;
2044 dma_addr_t dataphysaddr, protphysaddr;
2045 unsigned short curr_data = 0, curr_prot = 0;
2046 unsigned int split_offset;
2047 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2048 unsigned int protgrp_blks, protgrp_bytes;
2049 unsigned int remainder, subtotal;
2050 int status;
2051 int datadir = sc->sc_data_direction;
2052 unsigned char pgdone = 0, alldone = 0;
2053 unsigned blksize;
2054 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2055 uint32_t rc;
2056 #endif
2057 uint32_t checking = 1;
2058 uint32_t reftag;
2059 uint8_t txop, rxop;
2060 int num_bde = 0;
2061
2062 sgpe = scsi_prot_sglist(sc);
2063 sgde = scsi_sglist(sc);
2064
2065 if (!sgpe || !sgde) {
2066 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2067 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2068 sgpe, sgde);
2069 return 0;
2070 }
2071
2072 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2073 if (status)
2074 goto out;
2075
2076 /* extract some info from the scsi command */
2077 blksize = lpfc_cmd_blksize(sc);
2078 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2079
2080 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2081 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2082 if (rc) {
2083 if (rc & BG_ERR_SWAP)
2084 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2085 if (rc & BG_ERR_CHECK)
2086 checking = 0;
2087 }
2088 #endif
2089
2090 split_offset = 0;
2091 do {
2092 /* Check to see if we ran out of space */
2093 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2094 return num_bde + 3;
2095
2096 /* setup PDE5 with what we have */
2097 pde5 = (struct lpfc_pde5 *) bpl;
2098 memset(pde5, 0, sizeof(struct lpfc_pde5));
2099 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2100
2101 /* Endianness conversion if necessary for PDE5 */
2102 pde5->word0 = cpu_to_le32(pde5->word0);
2103 pde5->reftag = cpu_to_le32(reftag);
2104
2105 /* advance bpl and increment bde count */
2106 num_bde++;
2107 bpl++;
2108 pde6 = (struct lpfc_pde6 *) bpl;
2109
2110 /* setup PDE6 with the rest of the info */
2111 memset(pde6, 0, sizeof(struct lpfc_pde6));
2112 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2113 bf_set(pde6_optx, pde6, txop);
2114 bf_set(pde6_oprx, pde6, rxop);
2115
2116 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2117 bf_set(pde6_ce, pde6, checking);
2118 else
2119 bf_set(pde6_ce, pde6, 0);
2120
2121 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2122 bf_set(pde6_re, pde6, checking);
2123 else
2124 bf_set(pde6_re, pde6, 0);
2125
2126 bf_set(pde6_ai, pde6, 1);
2127 bf_set(pde6_ae, pde6, 0);
2128 bf_set(pde6_apptagval, pde6, 0);
2129
2130 /* Endianness conversion if necessary for PDE6 */
2131 pde6->word0 = cpu_to_le32(pde6->word0);
2132 pde6->word1 = cpu_to_le32(pde6->word1);
2133 pde6->word2 = cpu_to_le32(pde6->word2);
2134
2135 /* advance bpl and increment bde count */
2136 num_bde++;
2137 bpl++;
2138
2139 /* setup the first BDE that points to protection buffer */
2140 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2141 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2142
2143 /* must be integer multiple of the DIF block length */
2144 BUG_ON(protgroup_len % 8);
2145
2146 pde7 = (struct lpfc_pde7 *) bpl;
2147 memset(pde7, 0, sizeof(struct lpfc_pde7));
2148 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2149
2150 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2151 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2152
2153 protgrp_blks = protgroup_len / 8;
2154 protgrp_bytes = protgrp_blks * blksize;
2155
2156 /* check if this pde is crossing the 4K boundary; if so split */
2157 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2158 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2159 protgroup_offset += protgroup_remainder;
2160 protgrp_blks = protgroup_remainder / 8;
2161 protgrp_bytes = protgrp_blks * blksize;
2162 } else {
2163 protgroup_offset = 0;
2164 curr_prot++;
2165 }
2166
2167 num_bde++;
2168
2169 /* setup BDE's for data blocks associated with DIF data */
2170 pgdone = 0;
2171 subtotal = 0; /* total bytes processed for current prot grp */
2172 while (!pgdone) {
2173 /* Check to see if we ran out of space */
2174 if (num_bde >= phba->cfg_total_seg_cnt)
2175 return num_bde + 1;
2176
2177 if (!sgde) {
2178 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2179 "9065 BLKGRD:%s Invalid data segment\n",
2180 __func__);
2181 return 0;
2182 }
2183 bpl++;
2184 dataphysaddr = sg_dma_address(sgde) + split_offset;
2185 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2186 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2187
2188 remainder = sg_dma_len(sgde) - split_offset;
2189
2190 if ((subtotal + remainder) <= protgrp_bytes) {
2191 /* we can use this whole buffer */
2192 bpl->tus.f.bdeSize = remainder;
2193 split_offset = 0;
2194
2195 if ((subtotal + remainder) == protgrp_bytes)
2196 pgdone = 1;
2197 } else {
2198 /* must split this buffer with next prot grp */
2199 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2200 split_offset += bpl->tus.f.bdeSize;
2201 }
2202
2203 subtotal += bpl->tus.f.bdeSize;
2204
2205 if (datadir == DMA_TO_DEVICE)
2206 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2207 else
2208 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2209 bpl->tus.w = le32_to_cpu(bpl->tus.w);
2210
2211 num_bde++;
2212 curr_data++;
2213
2214 if (split_offset)
2215 break;
2216
2217 /* Move to the next s/g segment if possible */
2218 sgde = sg_next(sgde);
2219
2220 }
2221
2222 if (protgroup_offset) {
2223 /* update the reference tag */
2224 reftag += protgrp_blks;
2225 bpl++;
2226 continue;
2227 }
2228
2229 /* are we done ? */
2230 if (curr_prot == protcnt) {
2231 alldone = 1;
2232 } else if (curr_prot < protcnt) {
2233 /* advance to next prot buffer */
2234 sgpe = sg_next(sgpe);
2235 bpl++;
2236
2237 /* update the reference tag */
2238 reftag += protgrp_blks;
2239 } else {
2240 /* if we're here, we have a bug */
2241 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2242 "9054 BLKGRD: bug in %s\n", __func__);
2243 }
2244
2245 } while (!alldone);
2246 out:
2247
2248 return num_bde;
2249 }
2250
2251 /**
2252 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2253 * @phba: The Hba for which this call is being executed.
2254 * @sc: pointer to scsi command we're working on
2255 * @sgl: pointer to buffer list for protection groups
2256 * @datacnt: number of segments of data that have been dma mapped
2257 *
2258 * This function sets up SGL buffer list for protection groups of
2259 * type LPFC_PG_TYPE_NO_DIF
2260 *
2261 * This is usually used when the HBA is instructed to generate
2262 * DIFs and insert them into data stream (or strip DIF from
2263 * incoming data stream)
2264 *
2265 * The buffer list consists of just one protection group described
2266 * below:
2267 * +-------------------------+
2268 * start of prot group --> | DI_SEED |
2269 * +-------------------------+
2270 * | Data SGE |
2271 * +-------------------------+
2272 * |more Data SGE's ... (opt)|
2273 * +-------------------------+
2274 *
2275 *
2276 * Note: Data s/g buffers have been dma mapped
2277 *
2278 * Returns the number of SGEs added to the SGL.
2279 **/
2280 static int
2281 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2282 struct sli4_sge *sgl, int datasegcnt)
2283 {
2284 struct scatterlist *sgde = NULL; /* s/g data entry */
2285 struct sli4_sge_diseed *diseed = NULL;
2286 dma_addr_t physaddr;
2287 int i = 0, num_sge = 0, status;
2288 uint32_t reftag;
2289 uint8_t txop, rxop;
2290 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2291 uint32_t rc;
2292 #endif
2293 uint32_t checking = 1;
2294 uint32_t dma_len;
2295 uint32_t dma_offset = 0;
2296
2297 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2298 if (status)
2299 goto out;
2300
2301 /* extract some info from the scsi command for pde*/
2302 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2303
2304 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2305 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2306 if (rc) {
2307 if (rc & BG_ERR_SWAP)
2308 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2309 if (rc & BG_ERR_CHECK)
2310 checking = 0;
2311 }
2312 #endif
2313
2314 /* setup DISEED with what we have */
2315 diseed = (struct sli4_sge_diseed *) sgl;
2316 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2317 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2318
2319 /* Endianness conversion if necessary */
2320 diseed->ref_tag = cpu_to_le32(reftag);
2321 diseed->ref_tag_tran = diseed->ref_tag;
2322
2323 /*
2324 * We only need to check the data on READs, for WRITEs
2325 * protection data is automatically generated, not checked.
2326 */
2327 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2328 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2329 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2330 else
2331 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2332
2333 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2334 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2335 else
2336 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2337 }
2338
2339 /* setup DISEED with the rest of the info */
2340 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2341 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2342
2343 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2344 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2345
2346 /* Endianness conversion if necessary for DISEED */
2347 diseed->word2 = cpu_to_le32(diseed->word2);
2348 diseed->word3 = cpu_to_le32(diseed->word3);
2349
2350 /* advance bpl and increment sge count */
2351 num_sge++;
2352 sgl++;
2353
2354 /* assumption: caller has already run dma_map_sg on command data */
2355 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2356 physaddr = sg_dma_address(sgde);
2357 dma_len = sg_dma_len(sgde);
2358 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2359 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2360 if ((i + 1) == datasegcnt)
2361 bf_set(lpfc_sli4_sge_last, sgl, 1);
2362 else
2363 bf_set(lpfc_sli4_sge_last, sgl, 0);
2364 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2365 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2366
2367 sgl->sge_len = cpu_to_le32(dma_len);
2368 dma_offset += dma_len;
2369
2370 sgl++;
2371 num_sge++;
2372 }
2373
2374 out:
2375 return num_sge;
2376 }
2377
2378 /**
2379 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2380 * @phba: The Hba for which this call is being executed.
2381 * @sc: pointer to scsi command we're working on
2382 * @sgl: pointer to buffer list for protection groups
2383 * @datacnt: number of segments of data that have been dma mapped
2384 * @protcnt: number of segment of protection data that have been dma mapped
2385 *
2386 * This function sets up SGL buffer list for protection groups of
2387 * type LPFC_PG_TYPE_DIF
2388 *
2389 * This is usually used when DIFs are in their own buffers,
2390 * separate from the data. The HBA can then by instructed
2391 * to place the DIFs in the outgoing stream. For read operations,
2392 * The HBA could extract the DIFs and place it in DIF buffers.
2393 *
2394 * The buffer list for this type consists of one or more of the
2395 * protection groups described below:
2396 * +-------------------------+
2397 * start of first prot group --> | DISEED |
2398 * +-------------------------+
2399 * | DIF (Prot SGE) |
2400 * +-------------------------+
2401 * | Data SGE |
2402 * +-------------------------+
2403 * |more Data SGE's ... (opt)|
2404 * +-------------------------+
2405 * start of new prot group --> | DISEED |
2406 * +-------------------------+
2407 * | ... |
2408 * +-------------------------+
2409 *
2410 * Note: It is assumed that both data and protection s/g buffers have been
2411 * mapped for DMA
2412 *
2413 * Returns the number of SGEs added to the SGL.
2414 **/
2415 static int
2416 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2417 struct sli4_sge *sgl, int datacnt, int protcnt)
2418 {
2419 struct scatterlist *sgde = NULL; /* s/g data entry */
2420 struct scatterlist *sgpe = NULL; /* s/g prot entry */
2421 struct sli4_sge_diseed *diseed = NULL;
2422 dma_addr_t dataphysaddr, protphysaddr;
2423 unsigned short curr_data = 0, curr_prot = 0;
2424 unsigned int split_offset;
2425 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2426 unsigned int protgrp_blks, protgrp_bytes;
2427 unsigned int remainder, subtotal;
2428 int status;
2429 unsigned char pgdone = 0, alldone = 0;
2430 unsigned blksize;
2431 uint32_t reftag;
2432 uint8_t txop, rxop;
2433 uint32_t dma_len;
2434 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2435 uint32_t rc;
2436 #endif
2437 uint32_t checking = 1;
2438 uint32_t dma_offset = 0;
2439 int num_sge = 0;
2440
2441 sgpe = scsi_prot_sglist(sc);
2442 sgde = scsi_sglist(sc);
2443
2444 if (!sgpe || !sgde) {
2445 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2446 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2447 sgpe, sgde);
2448 return 0;
2449 }
2450
2451 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2452 if (status)
2453 goto out;
2454
2455 /* extract some info from the scsi command */
2456 blksize = lpfc_cmd_blksize(sc);
2457 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2458
2459 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2460 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2461 if (rc) {
2462 if (rc & BG_ERR_SWAP)
2463 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2464 if (rc & BG_ERR_CHECK)
2465 checking = 0;
2466 }
2467 #endif
2468
2469 split_offset = 0;
2470 do {
2471 /* Check to see if we ran out of space */
2472 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2473 return num_sge + 3;
2474
2475 /* setup DISEED with what we have */
2476 diseed = (struct sli4_sge_diseed *) sgl;
2477 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2478 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2479
2480 /* Endianness conversion if necessary */
2481 diseed->ref_tag = cpu_to_le32(reftag);
2482 diseed->ref_tag_tran = diseed->ref_tag;
2483
2484 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2485 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2486
2487 } else {
2488 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2489 /*
2490 * When in this mode, the hardware will replace
2491 * the guard tag from the host with a
2492 * newly generated good CRC for the wire.
2493 * Switch to raw mode here to avoid this
2494 * behavior. What the host sends gets put on the wire.
2495 */
2496 if (txop == BG_OP_IN_CRC_OUT_CRC) {
2497 txop = BG_OP_RAW_MODE;
2498 rxop = BG_OP_RAW_MODE;
2499 }
2500 }
2501
2502
2503 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2504 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2505 else
2506 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2507
2508 /* setup DISEED with the rest of the info */
2509 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2510 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2511
2512 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2513 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2514
2515 /* Endianness conversion if necessary for DISEED */
2516 diseed->word2 = cpu_to_le32(diseed->word2);
2517 diseed->word3 = cpu_to_le32(diseed->word3);
2518
2519 /* advance sgl and increment bde count */
2520 num_sge++;
2521 sgl++;
2522
2523 /* setup the first BDE that points to protection buffer */
2524 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2525 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2526
2527 /* must be integer multiple of the DIF block length */
2528 BUG_ON(protgroup_len % 8);
2529
2530 /* Now setup DIF SGE */
2531 sgl->word2 = 0;
2532 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2533 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2534 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2535 sgl->word2 = cpu_to_le32(sgl->word2);
2536
2537 protgrp_blks = protgroup_len / 8;
2538 protgrp_bytes = protgrp_blks * blksize;
2539
2540 /* check if DIF SGE is crossing the 4K boundary; if so split */
2541 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2542 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2543 protgroup_offset += protgroup_remainder;
2544 protgrp_blks = protgroup_remainder / 8;
2545 protgrp_bytes = protgrp_blks * blksize;
2546 } else {
2547 protgroup_offset = 0;
2548 curr_prot++;
2549 }
2550
2551 num_sge++;
2552
2553 /* setup SGE's for data blocks associated with DIF data */
2554 pgdone = 0;
2555 subtotal = 0; /* total bytes processed for current prot grp */
2556 while (!pgdone) {
2557 /* Check to see if we ran out of space */
2558 if (num_sge >= phba->cfg_total_seg_cnt)
2559 return num_sge + 1;
2560
2561 if (!sgde) {
2562 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2563 "9086 BLKGRD:%s Invalid data segment\n",
2564 __func__);
2565 return 0;
2566 }
2567 sgl++;
2568 dataphysaddr = sg_dma_address(sgde) + split_offset;
2569
2570 remainder = sg_dma_len(sgde) - split_offset;
2571
2572 if ((subtotal + remainder) <= protgrp_bytes) {
2573 /* we can use this whole buffer */
2574 dma_len = remainder;
2575 split_offset = 0;
2576
2577 if ((subtotal + remainder) == protgrp_bytes)
2578 pgdone = 1;
2579 } else {
2580 /* must split this buffer with next prot grp */
2581 dma_len = protgrp_bytes - subtotal;
2582 split_offset += dma_len;
2583 }
2584
2585 subtotal += dma_len;
2586
2587 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2588 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2589 bf_set(lpfc_sli4_sge_last, sgl, 0);
2590 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2591 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2592
2593 sgl->sge_len = cpu_to_le32(dma_len);
2594 dma_offset += dma_len;
2595
2596 num_sge++;
2597 curr_data++;
2598
2599 if (split_offset)
2600 break;
2601
2602 /* Move to the next s/g segment if possible */
2603 sgde = sg_next(sgde);
2604 }
2605
2606 if (protgroup_offset) {
2607 /* update the reference tag */
2608 reftag += protgrp_blks;
2609 sgl++;
2610 continue;
2611 }
2612
2613 /* are we done ? */
2614 if (curr_prot == protcnt) {
2615 bf_set(lpfc_sli4_sge_last, sgl, 1);
2616 alldone = 1;
2617 } else if (curr_prot < protcnt) {
2618 /* advance to next prot buffer */
2619 sgpe = sg_next(sgpe);
2620 sgl++;
2621
2622 /* update the reference tag */
2623 reftag += protgrp_blks;
2624 } else {
2625 /* if we're here, we have a bug */
2626 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2627 "9085 BLKGRD: bug in %s\n", __func__);
2628 }
2629
2630 } while (!alldone);
2631
2632 out:
2633
2634 return num_sge;
2635 }
2636
2637 /**
2638 * lpfc_prot_group_type - Get prtotection group type of SCSI command
2639 * @phba: The Hba for which this call is being executed.
2640 * @sc: pointer to scsi command we're working on
2641 *
2642 * Given a SCSI command that supports DIF, determine composition of protection
2643 * groups involved in setting up buffer lists
2644 *
2645 * Returns: Protection group type (with or without DIF)
2646 *
2647 **/
2648 static int
2649 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2650 {
2651 int ret = LPFC_PG_TYPE_INVALID;
2652 unsigned char op = scsi_get_prot_op(sc);
2653
2654 switch (op) {
2655 case SCSI_PROT_READ_STRIP:
2656 case SCSI_PROT_WRITE_INSERT:
2657 ret = LPFC_PG_TYPE_NO_DIF;
2658 break;
2659 case SCSI_PROT_READ_INSERT:
2660 case SCSI_PROT_WRITE_STRIP:
2661 case SCSI_PROT_READ_PASS:
2662 case SCSI_PROT_WRITE_PASS:
2663 ret = LPFC_PG_TYPE_DIF_BUF;
2664 break;
2665 default:
2666 if (phba)
2667 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2668 "9021 Unsupported protection op:%d\n",
2669 op);
2670 break;
2671 }
2672 return ret;
2673 }
2674
2675 /**
2676 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2677 * @phba: The Hba for which this call is being executed.
2678 * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2679 *
2680 * Adjust the data length to account for how much data
2681 * is actually on the wire.
2682 *
2683 * returns the adjusted data length
2684 **/
2685 static int
2686 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2687 struct lpfc_scsi_buf *lpfc_cmd)
2688 {
2689 struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2690 int fcpdl;
2691
2692 fcpdl = scsi_bufflen(sc);
2693
2694 /* Check if there is protection data on the wire */
2695 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2696 /* Read check for protection data */
2697 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT)
2698 return fcpdl;
2699
2700 } else {
2701 /* Write check for protection data */
2702 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP)
2703 return fcpdl;
2704 }
2705
2706 /*
2707 * If we are in DIF Type 1 mode every data block has a 8 byte
2708 * DIF (trailer) attached to it. Must ajust FCP data length
2709 * to account for the protection data.
2710 */
2711 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2712
2713 return fcpdl;
2714 }
2715
2716 /**
2717 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2718 * @phba: The Hba for which this call is being executed.
2719 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2720 *
2721 * This is the protection/DIF aware version of
2722 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2723 * two functions eventually, but for now, it's here
2724 **/
2725 static int
2726 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2727 struct lpfc_scsi_buf *lpfc_cmd)
2728 {
2729 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2730 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2731 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2732 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2733 uint32_t num_bde = 0;
2734 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2735 int prot_group_type = 0;
2736 int fcpdl;
2737 struct lpfc_vport *vport = phba->pport;
2738
2739 /*
2740 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2741 * fcp_rsp regions to the first data bde entry
2742 */
2743 bpl += 2;
2744 if (scsi_sg_count(scsi_cmnd)) {
2745 /*
2746 * The driver stores the segment count returned from pci_map_sg
2747 * because this a count of dma-mappings used to map the use_sg
2748 * pages. They are not guaranteed to be the same for those
2749 * architectures that implement an IOMMU.
2750 */
2751 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2752 scsi_sglist(scsi_cmnd),
2753 scsi_sg_count(scsi_cmnd), datadir);
2754 if (unlikely(!datasegcnt))
2755 return 1;
2756
2757 lpfc_cmd->seg_cnt = datasegcnt;
2758
2759 /* First check if data segment count from SCSI Layer is good */
2760 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2761 goto err;
2762
2763 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2764
2765 switch (prot_group_type) {
2766 case LPFC_PG_TYPE_NO_DIF:
2767
2768 /* Here we need to add a PDE5 and PDE6 to the count */
2769 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2770 goto err;
2771
2772 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2773 datasegcnt);
2774 /* we should have 2 or more entries in buffer list */
2775 if (num_bde < 2)
2776 goto err;
2777 break;
2778
2779 case LPFC_PG_TYPE_DIF_BUF:
2780 /*
2781 * This type indicates that protection buffers are
2782 * passed to the driver, so that needs to be prepared
2783 * for DMA
2784 */
2785 protsegcnt = dma_map_sg(&phba->pcidev->dev,
2786 scsi_prot_sglist(scsi_cmnd),
2787 scsi_prot_sg_count(scsi_cmnd), datadir);
2788 if (unlikely(!protsegcnt)) {
2789 scsi_dma_unmap(scsi_cmnd);
2790 return 1;
2791 }
2792
2793 lpfc_cmd->prot_seg_cnt = protsegcnt;
2794
2795 /*
2796 * There is a minimun of 4 BPLs used for every
2797 * protection data segment.
2798 */
2799 if ((lpfc_cmd->prot_seg_cnt * 4) >
2800 (phba->cfg_total_seg_cnt - 2))
2801 goto err;
2802
2803 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2804 datasegcnt, protsegcnt);
2805 /* we should have 3 or more entries in buffer list */
2806 if ((num_bde < 3) ||
2807 (num_bde > phba->cfg_total_seg_cnt))
2808 goto err;
2809 break;
2810
2811 case LPFC_PG_TYPE_INVALID:
2812 default:
2813 scsi_dma_unmap(scsi_cmnd);
2814 lpfc_cmd->seg_cnt = 0;
2815
2816 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2817 "9022 Unexpected protection group %i\n",
2818 prot_group_type);
2819 return 1;
2820 }
2821 }
2822
2823 /*
2824 * Finish initializing those IOCB fields that are dependent on the
2825 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
2826 * reinitialized since all iocb memory resources are used many times
2827 * for transmit, receive, and continuation bpl's.
2828 */
2829 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2830 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2831 iocb_cmd->ulpBdeCount = 1;
2832 iocb_cmd->ulpLe = 1;
2833
2834 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2835 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2836
2837 /*
2838 * Due to difference in data length between DIF/non-DIF paths,
2839 * we need to set word 4 of IOCB here
2840 */
2841 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2842
2843 /*
2844 * For First burst, we may need to adjust the initial transfer
2845 * length for DIF
2846 */
2847 if (iocb_cmd->un.fcpi.fcpi_XRdy &&
2848 (fcpdl < vport->cfg_first_burst_size))
2849 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
2850
2851 return 0;
2852 err:
2853 if (lpfc_cmd->seg_cnt)
2854 scsi_dma_unmap(scsi_cmnd);
2855 if (lpfc_cmd->prot_seg_cnt)
2856 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2857 scsi_prot_sg_count(scsi_cmnd),
2858 scsi_cmnd->sc_data_direction);
2859
2860 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2861 "9023 Cannot setup S/G List for HBA"
2862 "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2863 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2864 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2865 prot_group_type, num_bde);
2866
2867 lpfc_cmd->seg_cnt = 0;
2868 lpfc_cmd->prot_seg_cnt = 0;
2869 return 1;
2870 }
2871
2872 /*
2873 * This function calcuates the T10 DIF guard tag
2874 * on the specified data using a CRC algorithmn
2875 * using crc_t10dif.
2876 */
2877 static uint16_t
2878 lpfc_bg_crc(uint8_t *data, int count)
2879 {
2880 uint16_t crc = 0;
2881 uint16_t x;
2882
2883 crc = crc_t10dif(data, count);
2884 x = cpu_to_be16(crc);
2885 return x;
2886 }
2887
2888 /*
2889 * This function calcuates the T10 DIF guard tag
2890 * on the specified data using a CSUM algorithmn
2891 * using ip_compute_csum.
2892 */
2893 static uint16_t
2894 lpfc_bg_csum(uint8_t *data, int count)
2895 {
2896 uint16_t ret;
2897
2898 ret = ip_compute_csum(data, count);
2899 return ret;
2900 }
2901
2902 /*
2903 * This function examines the protection data to try to determine
2904 * what type of T10-DIF error occurred.
2905 */
2906 static void
2907 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2908 {
2909 struct scatterlist *sgpe; /* s/g prot entry */
2910 struct scatterlist *sgde; /* s/g data entry */
2911 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2912 struct scsi_dif_tuple *src = NULL;
2913 uint8_t *data_src = NULL;
2914 uint16_t guard_tag;
2915 uint16_t start_app_tag, app_tag;
2916 uint32_t start_ref_tag, ref_tag;
2917 int prot, protsegcnt;
2918 int err_type, len, data_len;
2919 int chk_ref, chk_app, chk_guard;
2920 uint16_t sum;
2921 unsigned blksize;
2922
2923 err_type = BGS_GUARD_ERR_MASK;
2924 sum = 0;
2925 guard_tag = 0;
2926
2927 /* First check to see if there is protection data to examine */
2928 prot = scsi_get_prot_op(cmd);
2929 if ((prot == SCSI_PROT_READ_STRIP) ||
2930 (prot == SCSI_PROT_WRITE_INSERT) ||
2931 (prot == SCSI_PROT_NORMAL))
2932 goto out;
2933
2934 /* Currently the driver just supports ref_tag and guard_tag checking */
2935 chk_ref = 1;
2936 chk_app = 0;
2937 chk_guard = 0;
2938
2939 /* Setup a ptr to the protection data provided by the SCSI host */
2940 sgpe = scsi_prot_sglist(cmd);
2941 protsegcnt = lpfc_cmd->prot_seg_cnt;
2942
2943 if (sgpe && protsegcnt) {
2944
2945 /*
2946 * We will only try to verify guard tag if the segment
2947 * data length is a multiple of the blksize.
2948 */
2949 sgde = scsi_sglist(cmd);
2950 blksize = lpfc_cmd_blksize(cmd);
2951 data_src = (uint8_t *)sg_virt(sgde);
2952 data_len = sgde->length;
2953 if ((data_len & (blksize - 1)) == 0)
2954 chk_guard = 1;
2955
2956 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2957 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2958 start_app_tag = src->app_tag;
2959 len = sgpe->length;
2960 while (src && protsegcnt) {
2961 while (len) {
2962
2963 /*
2964 * First check to see if a protection data
2965 * check is valid
2966 */
2967 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2968 (src->app_tag == T10_PI_APP_ESCAPE)) {
2969 start_ref_tag++;
2970 goto skipit;
2971 }
2972
2973 /* First Guard Tag checking */
2974 if (chk_guard) {
2975 guard_tag = src->guard_tag;
2976 if (lpfc_cmd_guard_csum(cmd))
2977 sum = lpfc_bg_csum(data_src,
2978 blksize);
2979 else
2980 sum = lpfc_bg_crc(data_src,
2981 blksize);
2982 if ((guard_tag != sum)) {
2983 err_type = BGS_GUARD_ERR_MASK;
2984 goto out;
2985 }
2986 }
2987
2988 /* Reference Tag checking */
2989 ref_tag = be32_to_cpu(src->ref_tag);
2990 if (chk_ref && (ref_tag != start_ref_tag)) {
2991 err_type = BGS_REFTAG_ERR_MASK;
2992 goto out;
2993 }
2994 start_ref_tag++;
2995
2996 /* App Tag checking */
2997 app_tag = src->app_tag;
2998 if (chk_app && (app_tag != start_app_tag)) {
2999 err_type = BGS_APPTAG_ERR_MASK;
3000 goto out;
3001 }
3002 skipit:
3003 len -= sizeof(struct scsi_dif_tuple);
3004 if (len < 0)
3005 len = 0;
3006 src++;
3007
3008 data_src += blksize;
3009 data_len -= blksize;
3010
3011 /*
3012 * Are we at the end of the Data segment?
3013 * The data segment is only used for Guard
3014 * tag checking.
3015 */
3016 if (chk_guard && (data_len == 0)) {
3017 chk_guard = 0;
3018 sgde = sg_next(sgde);
3019 if (!sgde)
3020 goto out;
3021
3022 data_src = (uint8_t *)sg_virt(sgde);
3023 data_len = sgde->length;
3024 if ((data_len & (blksize - 1)) == 0)
3025 chk_guard = 1;
3026 }
3027 }
3028
3029 /* Goto the next Protection data segment */
3030 sgpe = sg_next(sgpe);
3031 if (sgpe) {
3032 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3033 len = sgpe->length;
3034 } else {
3035 src = NULL;
3036 }
3037 protsegcnt--;
3038 }
3039 }
3040 out:
3041 if (err_type == BGS_GUARD_ERR_MASK) {
3042 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3043 0x10, 0x1);
3044 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3045 SAM_STAT_CHECK_CONDITION;
3046 phba->bg_guard_err_cnt++;
3047 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3048 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3049 (unsigned long)scsi_get_lba(cmd),
3050 sum, guard_tag);
3051
3052 } else if (err_type == BGS_REFTAG_ERR_MASK) {
3053 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3054 0x10, 0x3);
3055 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3056 SAM_STAT_CHECK_CONDITION;
3057
3058 phba->bg_reftag_err_cnt++;
3059 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3060 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3061 (unsigned long)scsi_get_lba(cmd),
3062 ref_tag, start_ref_tag);
3063
3064 } else if (err_type == BGS_APPTAG_ERR_MASK) {
3065 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3066 0x10, 0x2);
3067 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3068 SAM_STAT_CHECK_CONDITION;
3069
3070 phba->bg_apptag_err_cnt++;
3071 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3072 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3073 (unsigned long)scsi_get_lba(cmd),
3074 app_tag, start_app_tag);
3075 }
3076 }
3077
3078
3079 /*
3080 * This function checks for BlockGuard errors detected by
3081 * the HBA. In case of errors, the ASC/ASCQ fields in the
3082 * sense buffer will be set accordingly, paired with
3083 * ILLEGAL_REQUEST to signal to the kernel that the HBA
3084 * detected corruption.
3085 *
3086 * Returns:
3087 * 0 - No error found
3088 * 1 - BlockGuard error found
3089 * -1 - Internal error (bad profile, ...etc)
3090 */
3091 static int
3092 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3093 struct lpfc_iocbq *pIocbOut)
3094 {
3095 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3096 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3097 int ret = 0;
3098 uint32_t bghm = bgf->bghm;
3099 uint32_t bgstat = bgf->bgstat;
3100 uint64_t failing_sector = 0;
3101
3102 spin_lock(&_dump_buf_lock);
3103 if (!_dump_buf_done) {
3104 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
3105 " Data for %u blocks to debugfs\n",
3106 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3107 lpfc_debug_save_data(phba, cmd);
3108
3109 /* If we have a prot sgl, save the DIF buffer */
3110 if (lpfc_prot_group_type(phba, cmd) ==
3111 LPFC_PG_TYPE_DIF_BUF) {
3112 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3113 "Saving DIF for %u blocks to debugfs\n",
3114 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3115 lpfc_debug_save_dif(phba, cmd);
3116 }
3117
3118 _dump_buf_done = 1;
3119 }
3120 spin_unlock(&_dump_buf_lock);
3121
3122 if (lpfc_bgs_get_invalid_prof(bgstat)) {
3123 cmd->result = DID_ERROR << 16;
3124 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3125 "9072 BLKGRD: Invalid BG Profile in cmd"
3126 " 0x%x lba 0x%llx blk cnt 0x%x "
3127 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3128 (unsigned long long)scsi_get_lba(cmd),
3129 blk_rq_sectors(cmd->request), bgstat, bghm);
3130 ret = (-1);
3131 goto out;
3132 }
3133
3134 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3135 cmd->result = DID_ERROR << 16;
3136 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3137 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3138 " 0x%x lba 0x%llx blk cnt 0x%x "
3139 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3140 (unsigned long long)scsi_get_lba(cmd),
3141 blk_rq_sectors(cmd->request), bgstat, bghm);
3142 ret = (-1);
3143 goto out;
3144 }
3145
3146 if (lpfc_bgs_get_guard_err(bgstat)) {
3147 ret = 1;
3148
3149 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3150 0x10, 0x1);
3151 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3152 SAM_STAT_CHECK_CONDITION;
3153 phba->bg_guard_err_cnt++;
3154 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3155 "9055 BLKGRD: Guard Tag error in cmd"
3156 " 0x%x lba 0x%llx blk cnt 0x%x "
3157 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3158 (unsigned long long)scsi_get_lba(cmd),
3159 blk_rq_sectors(cmd->request), bgstat, bghm);
3160 }
3161
3162 if (lpfc_bgs_get_reftag_err(bgstat)) {
3163 ret = 1;
3164
3165 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3166 0x10, 0x3);
3167 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3168 SAM_STAT_CHECK_CONDITION;
3169
3170 phba->bg_reftag_err_cnt++;
3171 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3172 "9056 BLKGRD: Ref Tag error in cmd"
3173 " 0x%x lba 0x%llx blk cnt 0x%x "
3174 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3175 (unsigned long long)scsi_get_lba(cmd),
3176 blk_rq_sectors(cmd->request), bgstat, bghm);
3177 }
3178
3179 if (lpfc_bgs_get_apptag_err(bgstat)) {
3180 ret = 1;
3181
3182 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3183 0x10, 0x2);
3184 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3185 SAM_STAT_CHECK_CONDITION;
3186
3187 phba->bg_apptag_err_cnt++;
3188 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3189 "9061 BLKGRD: App Tag error in cmd"
3190 " 0x%x lba 0x%llx blk cnt 0x%x "
3191 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3192 (unsigned long long)scsi_get_lba(cmd),
3193 blk_rq_sectors(cmd->request), bgstat, bghm);
3194 }
3195
3196 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3197 /*
3198 * setup sense data descriptor 0 per SPC-4 as an information
3199 * field, and put the failing LBA in it.
3200 * This code assumes there was also a guard/app/ref tag error
3201 * indication.
3202 */
3203 cmd->sense_buffer[7] = 0xc; /* Additional sense length */
3204 cmd->sense_buffer[8] = 0; /* Information descriptor type */
3205 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
3206 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3207
3208 /* bghm is a "on the wire" FC frame based count */
3209 switch (scsi_get_prot_op(cmd)) {
3210 case SCSI_PROT_READ_INSERT:
3211 case SCSI_PROT_WRITE_STRIP:
3212 bghm /= cmd->device->sector_size;
3213 break;
3214 case SCSI_PROT_READ_STRIP:
3215 case SCSI_PROT_WRITE_INSERT:
3216 case SCSI_PROT_READ_PASS:
3217 case SCSI_PROT_WRITE_PASS:
3218 bghm /= (cmd->device->sector_size +
3219 sizeof(struct scsi_dif_tuple));
3220 break;
3221 }
3222
3223 failing_sector = scsi_get_lba(cmd);
3224 failing_sector += bghm;
3225
3226 /* Descriptor Information */
3227 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3228 }
3229
3230 if (!ret) {
3231 /* No error was reported - problem in FW? */
3232 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3233 "9057 BLKGRD: Unknown error in cmd"
3234 " 0x%x lba 0x%llx blk cnt 0x%x "
3235 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3236 (unsigned long long)scsi_get_lba(cmd),
3237 blk_rq_sectors(cmd->request), bgstat, bghm);
3238
3239 /* Calcuate what type of error it was */
3240 lpfc_calc_bg_err(phba, lpfc_cmd);
3241 }
3242 out:
3243 return ret;
3244 }
3245
3246 /**
3247 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3248 * @phba: The Hba for which this call is being executed.
3249 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3250 *
3251 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3252 * field of @lpfc_cmd for device with SLI-4 interface spec.
3253 *
3254 * Return codes:
3255 * 1 - Error
3256 * 0 - Success
3257 **/
3258 static int
3259 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3260 {
3261 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3262 struct scatterlist *sgel = NULL;
3263 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3264 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3265 struct sli4_sge *first_data_sgl;
3266 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3267 dma_addr_t physaddr;
3268 uint32_t num_bde = 0;
3269 uint32_t dma_len;
3270 uint32_t dma_offset = 0;
3271 int nseg;
3272 struct ulp_bde64 *bde;
3273
3274 /*
3275 * There are three possibilities here - use scatter-gather segment, use
3276 * the single mapping, or neither. Start the lpfc command prep by
3277 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3278 * data bde entry.
3279 */
3280 if (scsi_sg_count(scsi_cmnd)) {
3281 /*
3282 * The driver stores the segment count returned from pci_map_sg
3283 * because this a count of dma-mappings used to map the use_sg
3284 * pages. They are not guaranteed to be the same for those
3285 * architectures that implement an IOMMU.
3286 */
3287
3288 nseg = scsi_dma_map(scsi_cmnd);
3289 if (unlikely(nseg <= 0))
3290 return 1;
3291 sgl += 1;
3292 /* clear the last flag in the fcp_rsp map entry */
3293 sgl->word2 = le32_to_cpu(sgl->word2);
3294 bf_set(lpfc_sli4_sge_last, sgl, 0);
3295 sgl->word2 = cpu_to_le32(sgl->word2);
3296 sgl += 1;
3297 first_data_sgl = sgl;
3298 lpfc_cmd->seg_cnt = nseg;
3299 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3300 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3301 " %s: Too many sg segments from "
3302 "dma_map_sg. Config %d, seg_cnt %d\n",
3303 __func__, phba->cfg_sg_seg_cnt,
3304 lpfc_cmd->seg_cnt);
3305 lpfc_cmd->seg_cnt = 0;
3306 scsi_dma_unmap(scsi_cmnd);
3307 return 1;
3308 }
3309
3310 /*
3311 * The driver established a maximum scatter-gather segment count
3312 * during probe that limits the number of sg elements in any
3313 * single scsi command. Just run through the seg_cnt and format
3314 * the sge's.
3315 * When using SLI-3 the driver will try to fit all the BDEs into
3316 * the IOCB. If it can't then the BDEs get added to a BPL as it
3317 * does for SLI-2 mode.
3318 */
3319 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3320 physaddr = sg_dma_address(sgel);
3321 dma_len = sg_dma_len(sgel);
3322 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3323 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3324 sgl->word2 = le32_to_cpu(sgl->word2);
3325 if ((num_bde + 1) == nseg)
3326 bf_set(lpfc_sli4_sge_last, sgl, 1);
3327 else
3328 bf_set(lpfc_sli4_sge_last, sgl, 0);
3329 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3330 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3331 sgl->word2 = cpu_to_le32(sgl->word2);
3332 sgl->sge_len = cpu_to_le32(dma_len);
3333 dma_offset += dma_len;
3334 sgl++;
3335 }
3336 /*
3337 * Setup the first Payload BDE. For FCoE we just key off
3338 * Performance Hints, for FC we use lpfc_enable_pbde.
3339 * We populate words 13-15 of IOCB/WQE.
3340 */
3341 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3342 phba->cfg_enable_pbde) {
3343 bde = (struct ulp_bde64 *)
3344 &(iocb_cmd->unsli3.sli3Words[5]);
3345 bde->addrLow = first_data_sgl->addr_lo;
3346 bde->addrHigh = first_data_sgl->addr_hi;
3347 bde->tus.f.bdeSize =
3348 le32_to_cpu(first_data_sgl->sge_len);
3349 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3350 bde->tus.w = cpu_to_le32(bde->tus.w);
3351 }
3352 } else {
3353 sgl += 1;
3354 /* clear the last flag in the fcp_rsp map entry */
3355 sgl->word2 = le32_to_cpu(sgl->word2);
3356 bf_set(lpfc_sli4_sge_last, sgl, 1);
3357 sgl->word2 = cpu_to_le32(sgl->word2);
3358
3359 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3360 phba->cfg_enable_pbde) {
3361 bde = (struct ulp_bde64 *)
3362 &(iocb_cmd->unsli3.sli3Words[5]);
3363 memset(bde, 0, (sizeof(uint32_t) * 3));
3364 }
3365 }
3366
3367 /*
3368 * Finish initializing those IOCB fields that are dependent on the
3369 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
3370 * explicitly reinitialized.
3371 * all iocb memory resources are reused.
3372 */
3373 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3374
3375 /*
3376 * Due to difference in data length between DIF/non-DIF paths,
3377 * we need to set word 4 of IOCB here
3378 */
3379 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3380
3381 /*
3382 * If the OAS driver feature is enabled and the lun is enabled for
3383 * OAS, set the oas iocb related flags.
3384 */
3385 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3386 scsi_cmnd->device->hostdata)->oas_enabled) {
3387 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3388 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3389 scsi_cmnd->device->hostdata)->priority;
3390 }
3391 return 0;
3392 }
3393
3394 /**
3395 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3396 * @phba: The Hba for which this call is being executed.
3397 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3398 *
3399 * This is the protection/DIF aware version of
3400 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3401 * two functions eventually, but for now, it's here
3402 **/
3403 static int
3404 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3405 struct lpfc_scsi_buf *lpfc_cmd)
3406 {
3407 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3408 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3409 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3410 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3411 uint32_t num_sge = 0;
3412 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3413 int prot_group_type = 0;
3414 int fcpdl;
3415 struct lpfc_vport *vport = phba->pport;
3416
3417 /*
3418 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3419 * fcp_rsp regions to the first data sge entry
3420 */
3421 if (scsi_sg_count(scsi_cmnd)) {
3422 /*
3423 * The driver stores the segment count returned from pci_map_sg
3424 * because this a count of dma-mappings used to map the use_sg
3425 * pages. They are not guaranteed to be the same for those
3426 * architectures that implement an IOMMU.
3427 */
3428 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3429 scsi_sglist(scsi_cmnd),
3430 scsi_sg_count(scsi_cmnd), datadir);
3431 if (unlikely(!datasegcnt))
3432 return 1;
3433
3434 sgl += 1;
3435 /* clear the last flag in the fcp_rsp map entry */
3436 sgl->word2 = le32_to_cpu(sgl->word2);
3437 bf_set(lpfc_sli4_sge_last, sgl, 0);
3438 sgl->word2 = cpu_to_le32(sgl->word2);
3439
3440 sgl += 1;
3441 lpfc_cmd->seg_cnt = datasegcnt;
3442
3443 /* First check if data segment count from SCSI Layer is good */
3444 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3445 goto err;
3446
3447 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3448
3449 switch (prot_group_type) {
3450 case LPFC_PG_TYPE_NO_DIF:
3451 /* Here we need to add a DISEED to the count */
3452 if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3453 goto err;
3454
3455 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3456 datasegcnt);
3457
3458 /* we should have 2 or more entries in buffer list */
3459 if (num_sge < 2)
3460 goto err;
3461 break;
3462
3463 case LPFC_PG_TYPE_DIF_BUF:
3464 /*
3465 * This type indicates that protection buffers are
3466 * passed to the driver, so that needs to be prepared
3467 * for DMA
3468 */
3469 protsegcnt = dma_map_sg(&phba->pcidev->dev,
3470 scsi_prot_sglist(scsi_cmnd),
3471 scsi_prot_sg_count(scsi_cmnd), datadir);
3472 if (unlikely(!protsegcnt)) {
3473 scsi_dma_unmap(scsi_cmnd);
3474 return 1;
3475 }
3476
3477 lpfc_cmd->prot_seg_cnt = protsegcnt;
3478 /*
3479 * There is a minimun of 3 SGEs used for every
3480 * protection data segment.
3481 */
3482 if ((lpfc_cmd->prot_seg_cnt * 3) >
3483 (phba->cfg_total_seg_cnt - 2))
3484 goto err;
3485
3486 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3487 datasegcnt, protsegcnt);
3488
3489 /* we should have 3 or more entries in buffer list */
3490 if ((num_sge < 3) ||
3491 (num_sge > phba->cfg_total_seg_cnt))
3492 goto err;
3493 break;
3494
3495 case LPFC_PG_TYPE_INVALID:
3496 default:
3497 scsi_dma_unmap(scsi_cmnd);
3498 lpfc_cmd->seg_cnt = 0;
3499
3500 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3501 "9083 Unexpected protection group %i\n",
3502 prot_group_type);
3503 return 1;
3504 }
3505 }
3506
3507 switch (scsi_get_prot_op(scsi_cmnd)) {
3508 case SCSI_PROT_WRITE_STRIP:
3509 case SCSI_PROT_READ_STRIP:
3510 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3511 break;
3512 case SCSI_PROT_WRITE_INSERT:
3513 case SCSI_PROT_READ_INSERT:
3514 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3515 break;
3516 case SCSI_PROT_WRITE_PASS:
3517 case SCSI_PROT_READ_PASS:
3518 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3519 break;
3520 }
3521
3522 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3523 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3524
3525 /*
3526 * Due to difference in data length between DIF/non-DIF paths,
3527 * we need to set word 4 of IOCB here
3528 */
3529 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3530
3531 /*
3532 * For First burst, we may need to adjust the initial transfer
3533 * length for DIF
3534 */
3535 if (iocb_cmd->un.fcpi.fcpi_XRdy &&
3536 (fcpdl < vport->cfg_first_burst_size))
3537 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
3538
3539 /*
3540 * If the OAS driver feature is enabled and the lun is enabled for
3541 * OAS, set the oas iocb related flags.
3542 */
3543 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3544 scsi_cmnd->device->hostdata)->oas_enabled)
3545 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3546
3547 return 0;
3548 err:
3549 if (lpfc_cmd->seg_cnt)
3550 scsi_dma_unmap(scsi_cmnd);
3551 if (lpfc_cmd->prot_seg_cnt)
3552 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3553 scsi_prot_sg_count(scsi_cmnd),
3554 scsi_cmnd->sc_data_direction);
3555
3556 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3557 "9084 Cannot setup S/G List for HBA"
3558 "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3559 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3560 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3561 prot_group_type, num_sge);
3562
3563 lpfc_cmd->seg_cnt = 0;
3564 lpfc_cmd->prot_seg_cnt = 0;
3565 return 1;
3566 }
3567
3568 /**
3569 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3570 * @phba: The Hba for which this call is being executed.
3571 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3572 *
3573 * This routine wraps the actual DMA mapping function pointer from the
3574 * lpfc_hba struct.
3575 *
3576 * Return codes:
3577 * 1 - Error
3578 * 0 - Success
3579 **/
3580 static inline int
3581 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3582 {
3583 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3584 }
3585
3586 /**
3587 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3588 * using BlockGuard.
3589 * @phba: The Hba for which this call is being executed.
3590 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3591 *
3592 * This routine wraps the actual DMA mapping function pointer from the
3593 * lpfc_hba struct.
3594 *
3595 * Return codes:
3596 * 1 - Error
3597 * 0 - Success
3598 **/
3599 static inline int
3600 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3601 {
3602 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3603 }
3604
3605 /**
3606 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3607 * @phba: Pointer to hba context object.
3608 * @vport: Pointer to vport object.
3609 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3610 * @rsp_iocb: Pointer to response iocb object which reported error.
3611 *
3612 * This function posts an event when there is a SCSI command reporting
3613 * error from the scsi device.
3614 **/
3615 static void
3616 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3617 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3618 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3619 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3620 uint32_t resp_info = fcprsp->rspStatus2;
3621 uint32_t scsi_status = fcprsp->rspStatus3;
3622 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3623 struct lpfc_fast_path_event *fast_path_evt = NULL;
3624 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3625 unsigned long flags;
3626
3627 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3628 return;
3629
3630 /* If there is queuefull or busy condition send a scsi event */
3631 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3632 (cmnd->result == SAM_STAT_BUSY)) {
3633 fast_path_evt = lpfc_alloc_fast_evt(phba);
3634 if (!fast_path_evt)
3635 return;
3636 fast_path_evt->un.scsi_evt.event_type =
3637 FC_REG_SCSI_EVENT;
3638 fast_path_evt->un.scsi_evt.subcategory =
3639 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3640 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3641 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3642 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3643 &pnode->nlp_portname, sizeof(struct lpfc_name));
3644 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3645 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3646 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3647 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3648 fast_path_evt = lpfc_alloc_fast_evt(phba);
3649 if (!fast_path_evt)
3650 return;
3651 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3652 FC_REG_SCSI_EVENT;
3653 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3654 LPFC_EVENT_CHECK_COND;
3655 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3656 cmnd->device->lun;
3657 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3658 &pnode->nlp_portname, sizeof(struct lpfc_name));
3659 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3660 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3661 fast_path_evt->un.check_cond_evt.sense_key =
3662 cmnd->sense_buffer[2] & 0xf;
3663 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3664 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3665 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3666 fcpi_parm &&
3667 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3668 ((scsi_status == SAM_STAT_GOOD) &&
3669 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3670 /*
3671 * If status is good or resid does not match with fcp_param and
3672 * there is valid fcpi_parm, then there is a read_check error
3673 */
3674 fast_path_evt = lpfc_alloc_fast_evt(phba);
3675 if (!fast_path_evt)
3676 return;
3677 fast_path_evt->un.read_check_error.header.event_type =
3678 FC_REG_FABRIC_EVENT;
3679 fast_path_evt->un.read_check_error.header.subcategory =
3680 LPFC_EVENT_FCPRDCHKERR;
3681 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3682 &pnode->nlp_portname, sizeof(struct lpfc_name));
3683 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3684 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3685 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3686 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3687 fast_path_evt->un.read_check_error.fcpiparam =
3688 fcpi_parm;
3689 } else
3690 return;
3691
3692 fast_path_evt->vport = vport;
3693 spin_lock_irqsave(&phba->hbalock, flags);
3694 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3695 spin_unlock_irqrestore(&phba->hbalock, flags);
3696 lpfc_worker_wake_up(phba);
3697 return;
3698 }
3699
3700 /**
3701 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3702 * @phba: The HBA for which this call is being executed.
3703 * @psb: The scsi buffer which is going to be un-mapped.
3704 *
3705 * This routine does DMA un-mapping of scatter gather list of scsi command
3706 * field of @lpfc_cmd for device with SLI-3 interface spec.
3707 **/
3708 static void
3709 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3710 {
3711 /*
3712 * There are only two special cases to consider. (1) the scsi command
3713 * requested scatter-gather usage or (2) the scsi command allocated
3714 * a request buffer, but did not request use_sg. There is a third
3715 * case, but it does not require resource deallocation.
3716 */
3717 if (psb->seg_cnt > 0)
3718 scsi_dma_unmap(psb->pCmd);
3719 if (psb->prot_seg_cnt > 0)
3720 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3721 scsi_prot_sg_count(psb->pCmd),
3722 psb->pCmd->sc_data_direction);
3723 }
3724
3725 /**
3726 * lpfc_handler_fcp_err - FCP response handler
3727 * @vport: The virtual port for which this call is being executed.
3728 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3729 * @rsp_iocb: The response IOCB which contains FCP error.
3730 *
3731 * This routine is called to process response IOCB with status field
3732 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3733 * based upon SCSI and FCP error.
3734 **/
3735 static void
3736 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3737 struct lpfc_iocbq *rsp_iocb)
3738 {
3739 struct lpfc_hba *phba = vport->phba;
3740 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3741 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3742 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3743 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3744 uint32_t resp_info = fcprsp->rspStatus2;
3745 uint32_t scsi_status = fcprsp->rspStatus3;
3746 uint32_t *lp;
3747 uint32_t host_status = DID_OK;
3748 uint32_t rsplen = 0;
3749 uint32_t fcpDl;
3750 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3751
3752
3753 /*
3754 * If this is a task management command, there is no
3755 * scsi packet associated with this lpfc_cmd. The driver
3756 * consumes it.
3757 */
3758 if (fcpcmd->fcpCntl2) {
3759 scsi_status = 0;
3760 goto out;
3761 }
3762
3763 if (resp_info & RSP_LEN_VALID) {
3764 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3765 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3766 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3767 "2719 Invalid response length: "
3768 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3769 cmnd->device->id,
3770 cmnd->device->lun, cmnd->cmnd[0],
3771 rsplen);
3772 host_status = DID_ERROR;
3773 goto out;
3774 }
3775 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3776 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3777 "2757 Protocol failure detected during "
3778 "processing of FCP I/O op: "
3779 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3780 cmnd->device->id,
3781 cmnd->device->lun, cmnd->cmnd[0],
3782 fcprsp->rspInfo3);
3783 host_status = DID_ERROR;
3784 goto out;
3785 }
3786 }
3787
3788 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3789 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3790 if (snslen > SCSI_SENSE_BUFFERSIZE)
3791 snslen = SCSI_SENSE_BUFFERSIZE;
3792
3793 if (resp_info & RSP_LEN_VALID)
3794 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3795 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3796 }
3797 lp = (uint32_t *)cmnd->sense_buffer;
3798
3799 /* special handling for under run conditions */
3800 if (!scsi_status && (resp_info & RESID_UNDER)) {
3801 /* don't log under runs if fcp set... */
3802 if (vport->cfg_log_verbose & LOG_FCP)
3803 logit = LOG_FCP_ERROR;
3804 /* unless operator says so */
3805 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3806 logit = LOG_FCP_UNDER;
3807 }
3808
3809 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3810 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3811 "Data: x%x x%x x%x x%x x%x\n",
3812 cmnd->cmnd[0], scsi_status,
3813 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3814 be32_to_cpu(fcprsp->rspResId),
3815 be32_to_cpu(fcprsp->rspSnsLen),
3816 be32_to_cpu(fcprsp->rspRspLen),
3817 fcprsp->rspInfo3);
3818
3819 scsi_set_resid(cmnd, 0);
3820 fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3821 if (resp_info & RESID_UNDER) {
3822 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3823
3824 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3825 "9025 FCP Underrun, expected %d, "
3826 "residual %d Data: x%x x%x x%x\n",
3827 fcpDl,
3828 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3829 cmnd->underflow);
3830
3831 /*
3832 * If there is an under run, check if under run reported by
3833 * storage array is same as the under run reported by HBA.
3834 * If this is not same, there is a dropped frame.
3835 */
3836 if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3837 lpfc_printf_vlog(vport, KERN_WARNING,
3838 LOG_FCP | LOG_FCP_ERROR,
3839 "9026 FCP Read Check Error "
3840 "and Underrun Data: x%x x%x x%x x%x\n",
3841 fcpDl,
3842 scsi_get_resid(cmnd), fcpi_parm,
3843 cmnd->cmnd[0]);
3844 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3845 host_status = DID_ERROR;
3846 }
3847 /*
3848 * The cmnd->underflow is the minimum number of bytes that must
3849 * be transferred for this command. Provided a sense condition
3850 * is not present, make sure the actual amount transferred is at
3851 * least the underflow value or fail.
3852 */
3853 if (!(resp_info & SNS_LEN_VALID) &&
3854 (scsi_status == SAM_STAT_GOOD) &&
3855 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3856 < cmnd->underflow)) {
3857 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3858 "9027 FCP command x%x residual "
3859 "underrun converted to error "
3860 "Data: x%x x%x x%x\n",
3861 cmnd->cmnd[0], scsi_bufflen(cmnd),
3862 scsi_get_resid(cmnd), cmnd->underflow);
3863 host_status = DID_ERROR;
3864 }
3865 } else if (resp_info & RESID_OVER) {
3866 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3867 "9028 FCP command x%x residual overrun error. "
3868 "Data: x%x x%x\n", cmnd->cmnd[0],
3869 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3870 host_status = DID_ERROR;
3871
3872 /*
3873 * Check SLI validation that all the transfer was actually done
3874 * (fcpi_parm should be zero). Apply check only to reads.
3875 */
3876 } else if (fcpi_parm) {
3877 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3878 "9029 FCP %s Check Error xri x%x Data: "
3879 "x%x x%x x%x x%x x%x\n",
3880 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
3881 "Read" : "Write"),
3882 ((phba->sli_rev == LPFC_SLI_REV4) ?
3883 lpfc_cmd->cur_iocbq.sli4_xritag :
3884 rsp_iocb->iocb.ulpContext),
3885 fcpDl, be32_to_cpu(fcprsp->rspResId),
3886 fcpi_parm, cmnd->cmnd[0], scsi_status);
3887
3888 /* There is some issue with the LPe12000 that causes it
3889 * to miscalculate the fcpi_parm and falsely trip this
3890 * recovery logic. Detect this case and don't error when true.
3891 */
3892 if (fcpi_parm > fcpDl)
3893 goto out;
3894
3895 switch (scsi_status) {
3896 case SAM_STAT_GOOD:
3897 case SAM_STAT_CHECK_CONDITION:
3898 /* Fabric dropped a data frame. Fail any successful
3899 * command in which we detected dropped frames.
3900 * A status of good or some check conditions could
3901 * be considered a successful command.
3902 */
3903 host_status = DID_ERROR;
3904 break;
3905 }
3906 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3907 }
3908
3909 out:
3910 cmnd->result = host_status << 16 | scsi_status;
3911 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3912 }
3913
3914 /**
3915 * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
3916 * @phba: Pointer to HBA context object.
3917 *
3918 * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
3919 * distribution. This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
3920 * held.
3921 * If scsi-mq is enabled, get the default block layer mapping of software queues
3922 * to hardware queues. This information is saved in request tag.
3923 *
3924 * Return: index into SLI4 fast-path FCP queue index.
3925 **/
3926 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
3927 struct lpfc_scsi_buf *lpfc_cmd)
3928 {
3929 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3930 struct lpfc_vector_map_info *cpup;
3931 int chann, cpu;
3932 uint32_t tag;
3933 uint16_t hwq;
3934
3935 if (cmnd) {
3936 tag = blk_mq_unique_tag(cmnd->request);
3937 hwq = blk_mq_unique_tag_to_hwq(tag);
3938
3939 return hwq;
3940 }
3941
3942 if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
3943 && phba->cfg_fcp_io_channel > 1) {
3944 cpu = smp_processor_id();
3945 if (cpu < phba->sli4_hba.num_present_cpu) {
3946 cpup = phba->sli4_hba.cpu_map;
3947 cpup += cpu;
3948 return cpup->channel_id;
3949 }
3950 }
3951 chann = atomic_add_return(1, &phba->fcp_qidx);
3952 chann = chann % phba->cfg_fcp_io_channel;
3953 return chann;
3954 }
3955
3956
3957 /**
3958 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3959 * @phba: The Hba for which this call is being executed.
3960 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3961 * @pIocbOut: The response IOCBQ for the scsi cmnd.
3962 *
3963 * This routine assigns scsi command result by looking into response IOCB
3964 * status field appropriately. This routine handles QUEUE FULL condition as
3965 * well by ramping down device queue depth.
3966 **/
3967 static void
3968 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3969 struct lpfc_iocbq *pIocbOut)
3970 {
3971 struct lpfc_scsi_buf *lpfc_cmd =
3972 (struct lpfc_scsi_buf *) pIocbIn->context1;
3973 struct lpfc_vport *vport = pIocbIn->vport;
3974 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3975 struct lpfc_nodelist *pnode = rdata->pnode;
3976 struct scsi_cmnd *cmd;
3977 unsigned long flags;
3978 struct lpfc_fast_path_event *fast_path_evt;
3979 struct Scsi_Host *shost;
3980 uint32_t logit = LOG_FCP;
3981
3982 atomic_inc(&phba->fc4ScsiIoCmpls);
3983
3984 /* Sanity check on return of outstanding command */
3985 cmd = lpfc_cmd->pCmd;
3986 if (!cmd)
3987 return;
3988 shost = cmd->device->host;
3989
3990 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3991 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3992 /* pick up SLI4 exhange busy status from HBA */
3993 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3994
3995 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3996 if (lpfc_cmd->prot_data_type) {
3997 struct scsi_dif_tuple *src = NULL;
3998
3999 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4000 /*
4001 * Used to restore any changes to protection
4002 * data for error injection.
4003 */
4004 switch (lpfc_cmd->prot_data_type) {
4005 case LPFC_INJERR_REFTAG:
4006 src->ref_tag =
4007 lpfc_cmd->prot_data;
4008 break;
4009 case LPFC_INJERR_APPTAG:
4010 src->app_tag =
4011 (uint16_t)lpfc_cmd->prot_data;
4012 break;
4013 case LPFC_INJERR_GUARD:
4014 src->guard_tag =
4015 (uint16_t)lpfc_cmd->prot_data;
4016 break;
4017 default:
4018 break;
4019 }
4020
4021 lpfc_cmd->prot_data = 0;
4022 lpfc_cmd->prot_data_type = 0;
4023 lpfc_cmd->prot_data_segment = NULL;
4024 }
4025 #endif
4026
4027 if (lpfc_cmd->status) {
4028 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4029 (lpfc_cmd->result & IOERR_DRVR_MASK))
4030 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4031 else if (lpfc_cmd->status >= IOSTAT_CNT)
4032 lpfc_cmd->status = IOSTAT_DEFAULT;
4033 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4034 !lpfc_cmd->fcp_rsp->rspStatus3 &&
4035 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4036 !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4037 logit = 0;
4038 else
4039 logit = LOG_FCP | LOG_FCP_UNDER;
4040 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4041 "9030 FCP cmd x%x failed <%d/%lld> "
4042 "status: x%x result: x%x "
4043 "sid: x%x did: x%x oxid: x%x "
4044 "Data: x%x x%x\n",
4045 cmd->cmnd[0],
4046 cmd->device ? cmd->device->id : 0xffff,
4047 cmd->device ? cmd->device->lun : 0xffff,
4048 lpfc_cmd->status, lpfc_cmd->result,
4049 vport->fc_myDID,
4050 (pnode) ? pnode->nlp_DID : 0,
4051 phba->sli_rev == LPFC_SLI_REV4 ?
4052 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4053 pIocbOut->iocb.ulpContext,
4054 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4055
4056 switch (lpfc_cmd->status) {
4057 case IOSTAT_FCP_RSP_ERROR:
4058 /* Call FCP RSP handler to determine result */
4059 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4060 break;
4061 case IOSTAT_NPORT_BSY:
4062 case IOSTAT_FABRIC_BSY:
4063 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4064 fast_path_evt = lpfc_alloc_fast_evt(phba);
4065 if (!fast_path_evt)
4066 break;
4067 fast_path_evt->un.fabric_evt.event_type =
4068 FC_REG_FABRIC_EVENT;
4069 fast_path_evt->un.fabric_evt.subcategory =
4070 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4071 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4072 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4073 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4074 &pnode->nlp_portname,
4075 sizeof(struct lpfc_name));
4076 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4077 &pnode->nlp_nodename,
4078 sizeof(struct lpfc_name));
4079 }
4080 fast_path_evt->vport = vport;
4081 fast_path_evt->work_evt.evt =
4082 LPFC_EVT_FASTPATH_MGMT_EVT;
4083 spin_lock_irqsave(&phba->hbalock, flags);
4084 list_add_tail(&fast_path_evt->work_evt.evt_listp,
4085 &phba->work_list);
4086 spin_unlock_irqrestore(&phba->hbalock, flags);
4087 lpfc_worker_wake_up(phba);
4088 break;
4089 case IOSTAT_LOCAL_REJECT:
4090 case IOSTAT_REMOTE_STOP:
4091 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4092 lpfc_cmd->result ==
4093 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4094 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4095 lpfc_cmd->result ==
4096 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4097 cmd->result = DID_NO_CONNECT << 16;
4098 break;
4099 }
4100 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4101 lpfc_cmd->result == IOERR_NO_RESOURCES ||
4102 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4103 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4104 cmd->result = DID_REQUEUE << 16;
4105 break;
4106 }
4107 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4108 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4109 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4110 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4111 /*
4112 * This is a response for a BG enabled
4113 * cmd. Parse BG error
4114 */
4115 lpfc_parse_bg_err(phba, lpfc_cmd,
4116 pIocbOut);
4117 break;
4118 } else {
4119 lpfc_printf_vlog(vport, KERN_WARNING,
4120 LOG_BG,
4121 "9031 non-zero BGSTAT "
4122 "on unprotected cmd\n");
4123 }
4124 }
4125 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4126 && (phba->sli_rev == LPFC_SLI_REV4)
4127 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4128 /* This IO was aborted by the target, we don't
4129 * know the rxid and because we did not send the
4130 * ABTS we cannot generate and RRQ.
4131 */
4132 lpfc_set_rrq_active(phba, pnode,
4133 lpfc_cmd->cur_iocbq.sli4_lxritag,
4134 0, 0);
4135 }
4136 /* else: fall through */
4137 default:
4138 cmd->result = DID_ERROR << 16;
4139 break;
4140 }
4141
4142 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4143 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4144 cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
4145 SAM_STAT_BUSY;
4146 } else
4147 cmd->result = DID_OK << 16;
4148
4149 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4150 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4151
4152 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4153 "0710 Iodone <%d/%llu> cmd %p, error "
4154 "x%x SNS x%x x%x Data: x%x x%x\n",
4155 cmd->device->id, cmd->device->lun, cmd,
4156 cmd->result, *lp, *(lp + 3), cmd->retries,
4157 scsi_get_resid(cmd));
4158 }
4159
4160 lpfc_update_stats(phba, lpfc_cmd);
4161 if (vport->cfg_max_scsicmpl_time &&
4162 time_after(jiffies, lpfc_cmd->start_time +
4163 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4164 spin_lock_irqsave(shost->host_lock, flags);
4165 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4166 if (pnode->cmd_qdepth >
4167 atomic_read(&pnode->cmd_pending) &&
4168 (atomic_read(&pnode->cmd_pending) >
4169 LPFC_MIN_TGT_QDEPTH) &&
4170 ((cmd->cmnd[0] == READ_10) ||
4171 (cmd->cmnd[0] == WRITE_10)))
4172 pnode->cmd_qdepth =
4173 atomic_read(&pnode->cmd_pending);
4174
4175 pnode->last_change_time = jiffies;
4176 }
4177 spin_unlock_irqrestore(shost->host_lock, flags);
4178 }
4179 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4180
4181 /* If pCmd was set to NULL from abort path, do not call scsi_done */
4182 if (xchg(&lpfc_cmd->pCmd, NULL) == NULL) {
4183 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4184 "5688 FCP cmd already NULL, sid: 0x%06x, "
4185 "did: 0x%06x, oxid: 0x%04x\n",
4186 vport->fc_myDID,
4187 (pnode) ? pnode->nlp_DID : 0,
4188 phba->sli_rev == LPFC_SLI_REV4 ?
4189 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff);
4190 return;
4191 }
4192
4193 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4194 cmd->scsi_done(cmd);
4195
4196 /*
4197 * If there is a thread waiting for command completion
4198 * wake up the thread.
4199 */
4200 spin_lock_irqsave(shost->host_lock, flags);
4201 if (lpfc_cmd->waitq)
4202 wake_up(lpfc_cmd->waitq);
4203 spin_unlock_irqrestore(shost->host_lock, flags);
4204
4205 lpfc_release_scsi_buf(phba, lpfc_cmd);
4206 }
4207
4208 /**
4209 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4210 * @data: A pointer to the immediate command data portion of the IOCB.
4211 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4212 *
4213 * The routine copies the entire FCP command from @fcp_cmnd to @data while
4214 * byte swapping the data to big endian format for transmission on the wire.
4215 **/
4216 static void
4217 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4218 {
4219 int i, j;
4220 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4221 i += sizeof(uint32_t), j++) {
4222 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4223 }
4224 }
4225
4226 /**
4227 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4228 * @vport: The virtual port for which this call is being executed.
4229 * @lpfc_cmd: The scsi command which needs to send.
4230 * @pnode: Pointer to lpfc_nodelist.
4231 *
4232 * This routine initializes fcp_cmnd and iocb data structure from scsi command
4233 * to transfer for device with SLI3 interface spec.
4234 **/
4235 static void
4236 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4237 struct lpfc_nodelist *pnode)
4238 {
4239 struct lpfc_hba *phba = vport->phba;
4240 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4241 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4242 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4243 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4244 int datadir = scsi_cmnd->sc_data_direction;
4245 uint8_t *ptr;
4246 bool sli4;
4247 uint32_t fcpdl;
4248
4249 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4250 return;
4251
4252 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4253 /* clear task management bits */
4254 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4255
4256 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4257 &lpfc_cmd->fcp_cmnd->fcp_lun);
4258
4259 ptr = &fcp_cmnd->fcpCdb[0];
4260 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4261 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4262 ptr += scsi_cmnd->cmd_len;
4263 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4264 }
4265
4266 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4267
4268 sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4269 piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4270
4271 /*
4272 * There are three possibilities here - use scatter-gather segment, use
4273 * the single mapping, or neither. Start the lpfc command prep by
4274 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4275 * data bde entry.
4276 */
4277 if (scsi_sg_count(scsi_cmnd)) {
4278 if (datadir == DMA_TO_DEVICE) {
4279 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4280 iocb_cmd->ulpPU = PARM_READ_CHECK;
4281 if (vport->cfg_first_burst_size &&
4282 (pnode->nlp_flag & NLP_FIRSTBURST)) {
4283 fcpdl = scsi_bufflen(scsi_cmnd);
4284 if (fcpdl < vport->cfg_first_burst_size)
4285 piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4286 else
4287 piocbq->iocb.un.fcpi.fcpi_XRdy =
4288 vport->cfg_first_burst_size;
4289 }
4290 fcp_cmnd->fcpCntl3 = WRITE_DATA;
4291 atomic_inc(&phba->fc4ScsiOutputRequests);
4292 } else {
4293 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4294 iocb_cmd->ulpPU = PARM_READ_CHECK;
4295 fcp_cmnd->fcpCntl3 = READ_DATA;
4296 atomic_inc(&phba->fc4ScsiInputRequests);
4297 }
4298 } else {
4299 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4300 iocb_cmd->un.fcpi.fcpi_parm = 0;
4301 iocb_cmd->ulpPU = 0;
4302 fcp_cmnd->fcpCntl3 = 0;
4303 atomic_inc(&phba->fc4ScsiControlRequests);
4304 }
4305 if (phba->sli_rev == 3 &&
4306 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4307 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4308 /*
4309 * Finish initializing those IOCB fields that are independent
4310 * of the scsi_cmnd request_buffer
4311 */
4312 piocbq->iocb.ulpContext = pnode->nlp_rpi;
4313 if (sli4)
4314 piocbq->iocb.ulpContext =
4315 phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4316 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4317 piocbq->iocb.ulpFCP2Rcvy = 1;
4318 else
4319 piocbq->iocb.ulpFCP2Rcvy = 0;
4320
4321 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4322 piocbq->context1 = lpfc_cmd;
4323 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4324 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4325 piocbq->vport = vport;
4326 }
4327
4328 /**
4329 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4330 * @vport: The virtual port for which this call is being executed.
4331 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4332 * @lun: Logical unit number.
4333 * @task_mgmt_cmd: SCSI task management command.
4334 *
4335 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4336 * for device with SLI-3 interface spec.
4337 *
4338 * Return codes:
4339 * 0 - Error
4340 * 1 - Success
4341 **/
4342 static int
4343 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4344 struct lpfc_scsi_buf *lpfc_cmd,
4345 uint64_t lun,
4346 uint8_t task_mgmt_cmd)
4347 {
4348 struct lpfc_iocbq *piocbq;
4349 IOCB_t *piocb;
4350 struct fcp_cmnd *fcp_cmnd;
4351 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4352 struct lpfc_nodelist *ndlp = rdata->pnode;
4353
4354 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4355 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4356 return 0;
4357
4358 piocbq = &(lpfc_cmd->cur_iocbq);
4359 piocbq->vport = vport;
4360
4361 piocb = &piocbq->iocb;
4362
4363 fcp_cmnd = lpfc_cmd->fcp_cmnd;
4364 /* Clear out any old data in the FCP command area */
4365 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4366 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4367 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4368 if (vport->phba->sli_rev == 3 &&
4369 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4370 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4371 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4372 piocb->ulpContext = ndlp->nlp_rpi;
4373 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4374 piocb->ulpContext =
4375 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4376 }
4377 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4378 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4379 piocb->ulpPU = 0;
4380 piocb->un.fcpi.fcpi_parm = 0;
4381
4382 /* ulpTimeout is only one byte */
4383 if (lpfc_cmd->timeout > 0xff) {
4384 /*
4385 * Do not timeout the command at the firmware level.
4386 * The driver will provide the timeout mechanism.
4387 */
4388 piocb->ulpTimeout = 0;
4389 } else
4390 piocb->ulpTimeout = lpfc_cmd->timeout;
4391
4392 if (vport->phba->sli_rev == LPFC_SLI_REV4)
4393 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4394
4395 return 1;
4396 }
4397
4398 /**
4399 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4400 * @phba: The hba struct for which this call is being executed.
4401 * @dev_grp: The HBA PCI-Device group number.
4402 *
4403 * This routine sets up the SCSI interface API function jump table in @phba
4404 * struct.
4405 * Returns: 0 - success, -ENODEV - failure.
4406 **/
4407 int
4408 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4409 {
4410
4411 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4412 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4413
4414 switch (dev_grp) {
4415 case LPFC_PCI_DEV_LP:
4416 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4417 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4418 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4419 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4420 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4421 break;
4422 case LPFC_PCI_DEV_OC:
4423 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4424 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4425 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4426 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4427 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4428 break;
4429 default:
4430 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4431 "1418 Invalid HBA PCI-device group: 0x%x\n",
4432 dev_grp);
4433 return -ENODEV;
4434 break;
4435 }
4436 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4437 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4438 return 0;
4439 }
4440
4441 /**
4442 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4443 * @phba: The Hba for which this call is being executed.
4444 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4445 * @rspiocbq: Pointer to lpfc_iocbq data structure.
4446 *
4447 * This routine is IOCB completion routine for device reset and target reset
4448 * routine. This routine release scsi buffer associated with lpfc_cmd.
4449 **/
4450 static void
4451 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4452 struct lpfc_iocbq *cmdiocbq,
4453 struct lpfc_iocbq *rspiocbq)
4454 {
4455 struct lpfc_scsi_buf *lpfc_cmd =
4456 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4457 if (lpfc_cmd)
4458 lpfc_release_scsi_buf(phba, lpfc_cmd);
4459 return;
4460 }
4461
4462 /**
4463 * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
4464 * if issuing a pci_bus_reset is possibly unsafe
4465 * @phba: lpfc_hba pointer.
4466 *
4467 * Description:
4468 * Walks the bus_list to ensure only PCI devices with Emulex
4469 * vendor id, device ids that support hot reset, and only one occurrence
4470 * of function 0.
4471 *
4472 * Returns:
4473 * -EBADSLT, detected invalid device
4474 * 0, successful
4475 */
4476 int
4477 lpfc_check_pci_resettable(const struct lpfc_hba *phba)
4478 {
4479 const struct pci_dev *pdev = phba->pcidev;
4480 struct pci_dev *ptr = NULL;
4481 u8 counter = 0;
4482
4483 /* Walk the list of devices on the pci_dev's bus */
4484 list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
4485 /* Check for Emulex Vendor ID */
4486 if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
4487 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4488 "8346 Non-Emulex vendor found: "
4489 "0x%04x\n", ptr->vendor);
4490 return -EBADSLT;
4491 }
4492
4493 /* Check for valid Emulex Device ID */
4494 switch (ptr->device) {
4495 case PCI_DEVICE_ID_LANCER_FC:
4496 case PCI_DEVICE_ID_LANCER_G6_FC:
4497 case PCI_DEVICE_ID_LANCER_G7_FC:
4498 break;
4499 default:
4500 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4501 "8347 Invalid device found: "
4502 "0x%04x\n", ptr->device);
4503 return -EBADSLT;
4504 }
4505
4506 /* Check for only one function 0 ID to ensure only one HBA on
4507 * secondary bus
4508 */
4509 if (ptr->devfn == 0) {
4510 if (++counter > 1) {
4511 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4512 "8348 More than one device on "
4513 "secondary bus found\n");
4514 return -EBADSLT;
4515 }
4516 }
4517 }
4518
4519 return 0;
4520 }
4521
4522 /**
4523 * lpfc_info - Info entry point of scsi_host_template data structure
4524 * @host: The scsi host for which this call is being executed.
4525 *
4526 * This routine provides module information about hba.
4527 *
4528 * Reutrn code:
4529 * Pointer to char - Success.
4530 **/
4531 const char *
4532 lpfc_info(struct Scsi_Host *host)
4533 {
4534 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4535 struct lpfc_hba *phba = vport->phba;
4536 int link_speed = 0;
4537 static char lpfcinfobuf[384];
4538 char tmp[384] = {0};
4539
4540 memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
4541 if (phba && phba->pcidev){
4542 /* Model Description */
4543 scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
4544 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4545 sizeof(lpfcinfobuf))
4546 goto buffer_done;
4547
4548 /* PCI Info */
4549 scnprintf(tmp, sizeof(tmp),
4550 " on PCI bus %02x device %02x irq %d",
4551 phba->pcidev->bus->number, phba->pcidev->devfn,
4552 phba->pcidev->irq);
4553 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4554 sizeof(lpfcinfobuf))
4555 goto buffer_done;
4556
4557 /* Port Number */
4558 if (phba->Port[0]) {
4559 scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
4560 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4561 sizeof(lpfcinfobuf))
4562 goto buffer_done;
4563 }
4564
4565 /* Link Speed */
4566 link_speed = lpfc_sli_port_speed_get(phba);
4567 if (link_speed != 0) {
4568 scnprintf(tmp, sizeof(tmp),
4569 " Logical Link Speed: %d Mbps", link_speed);
4570 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4571 sizeof(lpfcinfobuf))
4572 goto buffer_done;
4573 }
4574
4575 /* PCI resettable */
4576 if (!lpfc_check_pci_resettable(phba)) {
4577 scnprintf(tmp, sizeof(tmp), " PCI resettable");
4578 strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
4579 }
4580 }
4581
4582 buffer_done:
4583 return lpfcinfobuf;
4584 }
4585
4586 /**
4587 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4588 * @phba: The Hba for which this call is being executed.
4589 *
4590 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
4591 * The default value of cfg_poll_tmo is 10 milliseconds.
4592 **/
4593 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4594 {
4595 unsigned long poll_tmo_expires =
4596 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4597
4598 if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4599 mod_timer(&phba->fcp_poll_timer,
4600 poll_tmo_expires);
4601 }
4602
4603 /**
4604 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4605 * @phba: The Hba for which this call is being executed.
4606 *
4607 * This routine starts the fcp_poll_timer of @phba.
4608 **/
4609 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4610 {
4611 lpfc_poll_rearm_timer(phba);
4612 }
4613
4614 /**
4615 * lpfc_poll_timeout - Restart polling timer
4616 * @ptr: Map to lpfc_hba data structure pointer.
4617 *
4618 * This routine restarts fcp_poll timer, when FCP ring polling is enable
4619 * and FCP Ring interrupt is disable.
4620 **/
4621
4622 void lpfc_poll_timeout(struct timer_list *t)
4623 {
4624 struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4625
4626 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4627 lpfc_sli_handle_fast_ring_event(phba,
4628 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4629
4630 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4631 lpfc_poll_rearm_timer(phba);
4632 }
4633 }
4634
4635 /**
4636 * lpfc_queuecommand - scsi_host_template queuecommand entry point
4637 * @cmnd: Pointer to scsi_cmnd data structure.
4638 * @done: Pointer to done routine.
4639 *
4640 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4641 * This routine prepares an IOCB from scsi command and provides to firmware.
4642 * The @done callback is invoked after driver finished processing the command.
4643 *
4644 * Return value :
4645 * 0 - Success
4646 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4647 **/
4648 static int
4649 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4650 {
4651 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4652 struct lpfc_hba *phba = vport->phba;
4653 struct lpfc_rport_data *rdata;
4654 struct lpfc_nodelist *ndlp;
4655 struct lpfc_scsi_buf *lpfc_cmd;
4656 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4657 int err;
4658
4659 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4660
4661 /* sanity check on references */
4662 if (unlikely(!rdata) || unlikely(!rport))
4663 goto out_fail_command;
4664
4665 err = fc_remote_port_chkready(rport);
4666 if (err) {
4667 cmnd->result = err;
4668 goto out_fail_command;
4669 }
4670 ndlp = rdata->pnode;
4671
4672 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4673 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4674
4675 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4676 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4677 " op:%02x str=%s without registering for"
4678 " BlockGuard - Rejecting command\n",
4679 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4680 dif_op_str[scsi_get_prot_op(cmnd)]);
4681 goto out_fail_command;
4682 }
4683
4684 /*
4685 * Catch race where our node has transitioned, but the
4686 * transport is still transitioning.
4687 */
4688 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4689 goto out_tgt_busy;
4690 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
4691 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
4692 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4693 "3377 Target Queue Full, scsi Id:%d "
4694 "Qdepth:%d Pending command:%d"
4695 " WWNN:%02x:%02x:%02x:%02x:"
4696 "%02x:%02x:%02x:%02x, "
4697 " WWPN:%02x:%02x:%02x:%02x:"
4698 "%02x:%02x:%02x:%02x",
4699 ndlp->nlp_sid, ndlp->cmd_qdepth,
4700 atomic_read(&ndlp->cmd_pending),
4701 ndlp->nlp_nodename.u.wwn[0],
4702 ndlp->nlp_nodename.u.wwn[1],
4703 ndlp->nlp_nodename.u.wwn[2],
4704 ndlp->nlp_nodename.u.wwn[3],
4705 ndlp->nlp_nodename.u.wwn[4],
4706 ndlp->nlp_nodename.u.wwn[5],
4707 ndlp->nlp_nodename.u.wwn[6],
4708 ndlp->nlp_nodename.u.wwn[7],
4709 ndlp->nlp_portname.u.wwn[0],
4710 ndlp->nlp_portname.u.wwn[1],
4711 ndlp->nlp_portname.u.wwn[2],
4712 ndlp->nlp_portname.u.wwn[3],
4713 ndlp->nlp_portname.u.wwn[4],
4714 ndlp->nlp_portname.u.wwn[5],
4715 ndlp->nlp_portname.u.wwn[6],
4716 ndlp->nlp_portname.u.wwn[7]);
4717 goto out_tgt_busy;
4718 }
4719 }
4720
4721 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4722 if (lpfc_cmd == NULL) {
4723 lpfc_rampdown_queue_depth(phba);
4724
4725 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4726 "0707 driver's buffer pool is empty, "
4727 "IO busied\n");
4728 goto out_host_busy;
4729 }
4730
4731 /*
4732 * Store the midlayer's command structure for the completion phase
4733 * and complete the command initialization.
4734 */
4735 lpfc_cmd->pCmd = cmnd;
4736 lpfc_cmd->rdata = rdata;
4737 lpfc_cmd->ndlp = ndlp;
4738 lpfc_cmd->timeout = 0;
4739 lpfc_cmd->start_time = jiffies;
4740 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4741
4742 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4743 if (vport->phba->cfg_enable_bg) {
4744 lpfc_printf_vlog(vport,
4745 KERN_INFO, LOG_SCSI_CMD,
4746 "9033 BLKGRD: rcvd %s cmd:x%x "
4747 "sector x%llx cnt %u pt %x\n",
4748 dif_op_str[scsi_get_prot_op(cmnd)],
4749 cmnd->cmnd[0],
4750 (unsigned long long)scsi_get_lba(cmnd),
4751 blk_rq_sectors(cmnd->request),
4752 (cmnd->cmnd[1]>>5));
4753 }
4754 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4755 } else {
4756 if (vport->phba->cfg_enable_bg) {
4757 lpfc_printf_vlog(vport,
4758 KERN_INFO, LOG_SCSI_CMD,
4759 "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4760 "x%x sector x%llx cnt %u pt %x\n",
4761 cmnd->cmnd[0],
4762 (unsigned long long)scsi_get_lba(cmnd),
4763 blk_rq_sectors(cmnd->request),
4764 (cmnd->cmnd[1]>>5));
4765 }
4766 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4767 }
4768
4769 if (err)
4770 goto out_host_busy_free_buf;
4771
4772 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4773
4774 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4775 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4776 if (err) {
4777 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4778 "3376 FCP could not issue IOCB err %x"
4779 "FCP cmd x%x <%d/%llu> "
4780 "sid: x%x did: x%x oxid: x%x "
4781 "Data: x%x x%x x%x x%x\n",
4782 err, cmnd->cmnd[0],
4783 cmnd->device ? cmnd->device->id : 0xffff,
4784 cmnd->device ? cmnd->device->lun : (u64) -1,
4785 vport->fc_myDID, ndlp->nlp_DID,
4786 phba->sli_rev == LPFC_SLI_REV4 ?
4787 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4788 lpfc_cmd->cur_iocbq.iocb.ulpContext,
4789 lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4790 lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4791 (uint32_t)
4792 (cmnd->request->timeout / 1000));
4793
4794 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
4795 case WRITE_DATA:
4796 atomic_dec(&phba->fc4ScsiOutputRequests);
4797 break;
4798 case READ_DATA:
4799 atomic_dec(&phba->fc4ScsiInputRequests);
4800 break;
4801 default:
4802 atomic_dec(&phba->fc4ScsiControlRequests);
4803 }
4804 goto out_host_busy_free_buf;
4805 }
4806 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4807 lpfc_sli_handle_fast_ring_event(phba,
4808 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4809
4810 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4811 lpfc_poll_rearm_timer(phba);
4812 }
4813
4814 return 0;
4815
4816 out_host_busy_free_buf:
4817 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4818 lpfc_release_scsi_buf(phba, lpfc_cmd);
4819 out_host_busy:
4820 return SCSI_MLQUEUE_HOST_BUSY;
4821
4822 out_tgt_busy:
4823 return SCSI_MLQUEUE_TARGET_BUSY;
4824
4825 out_fail_command:
4826 cmnd->scsi_done(cmnd);
4827 return 0;
4828 }
4829
4830
4831 /**
4832 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4833 * @cmnd: Pointer to scsi_cmnd data structure.
4834 *
4835 * This routine aborts @cmnd pending in base driver.
4836 *
4837 * Return code :
4838 * 0x2003 - Error
4839 * 0x2002 - Success
4840 **/
4841 static int
4842 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4843 {
4844 struct Scsi_Host *shost = cmnd->device->host;
4845 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4846 struct lpfc_hba *phba = vport->phba;
4847 struct lpfc_iocbq *iocb;
4848 struct lpfc_iocbq *abtsiocb;
4849 struct lpfc_scsi_buf *lpfc_cmd;
4850 IOCB_t *cmd, *icmd;
4851 int ret = SUCCESS, status = 0;
4852 struct lpfc_sli_ring *pring_s4 = NULL;
4853 int ret_val;
4854 unsigned long flags;
4855 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4856
4857 status = fc_block_scsi_eh(cmnd);
4858 if (status != 0 && status != SUCCESS)
4859 return status;
4860
4861 spin_lock_irqsave(&phba->hbalock, flags);
4862 /* driver queued commands are in process of being flushed */
4863 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4864 spin_unlock_irqrestore(&phba->hbalock, flags);
4865 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4866 "3168 SCSI Layer abort requested I/O has been "
4867 "flushed by LLD.\n");
4868 return FAILED;
4869 }
4870
4871 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4872 if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4873 spin_unlock_irqrestore(&phba->hbalock, flags);
4874 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4875 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4876 "x%x ID %d LUN %llu\n",
4877 SUCCESS, cmnd->device->id, cmnd->device->lun);
4878 return SUCCESS;
4879 }
4880
4881 iocb = &lpfc_cmd->cur_iocbq;
4882 if (phba->sli_rev == LPFC_SLI_REV4) {
4883 if (!(phba->cfg_fof) ||
4884 (!(iocb->iocb_flag & LPFC_IO_FOF))) {
4885 pring_s4 =
4886 phba->sli4_hba.fcp_wq[iocb->hba_wqidx]->pring;
4887 } else {
4888 iocb->hba_wqidx = 0;
4889 pring_s4 = phba->sli4_hba.oas_wq->pring;
4890 }
4891 if (!pring_s4) {
4892 ret = FAILED;
4893 goto out_unlock;
4894 }
4895 spin_lock(&pring_s4->ring_lock);
4896 }
4897 /* the command is in process of being cancelled */
4898 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4899 if (phba->sli_rev == LPFC_SLI_REV4)
4900 spin_unlock(&pring_s4->ring_lock);
4901 spin_unlock_irqrestore(&phba->hbalock, flags);
4902 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4903 "3169 SCSI Layer abort requested I/O has been "
4904 "cancelled by LLD.\n");
4905 return FAILED;
4906 }
4907 /*
4908 * If pCmd field of the corresponding lpfc_scsi_buf structure
4909 * points to a different SCSI command, then the driver has
4910 * already completed this command, but the midlayer did not
4911 * see the completion before the eh fired. Just return SUCCESS.
4912 */
4913 if (lpfc_cmd->pCmd != cmnd) {
4914 if (phba->sli_rev == LPFC_SLI_REV4)
4915 spin_unlock(&pring_s4->ring_lock);
4916 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4917 "3170 SCSI Layer abort requested I/O has been "
4918 "completed by LLD.\n");
4919 goto out_unlock;
4920 }
4921
4922 BUG_ON(iocb->context1 != lpfc_cmd);
4923
4924 /* abort issued in recovery is still in progress */
4925 if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4926 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4927 "3389 SCSI Layer I/O Abort Request is pending\n");
4928 if (phba->sli_rev == LPFC_SLI_REV4)
4929 spin_unlock(&pring_s4->ring_lock);
4930 spin_unlock_irqrestore(&phba->hbalock, flags);
4931 goto wait_for_cmpl;
4932 }
4933
4934 abtsiocb = __lpfc_sli_get_iocbq(phba);
4935 if (abtsiocb == NULL) {
4936 ret = FAILED;
4937 if (phba->sli_rev == LPFC_SLI_REV4)
4938 spin_unlock(&pring_s4->ring_lock);
4939 goto out_unlock;
4940 }
4941
4942 /* Indicate the IO is being aborted by the driver. */
4943 iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4944
4945 /*
4946 * The scsi command can not be in txq and it is in flight because the
4947 * pCmd is still pointig at the SCSI command we have to abort. There
4948 * is no need to search the txcmplq. Just send an abort to the FW.
4949 */
4950
4951 cmd = &iocb->iocb;
4952 icmd = &abtsiocb->iocb;
4953 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4954 icmd->un.acxri.abortContextTag = cmd->ulpContext;
4955 if (phba->sli_rev == LPFC_SLI_REV4)
4956 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4957 else
4958 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4959
4960 icmd->ulpLe = 1;
4961 icmd->ulpClass = cmd->ulpClass;
4962
4963 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4964 abtsiocb->hba_wqidx = iocb->hba_wqidx;
4965 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4966 if (iocb->iocb_flag & LPFC_IO_FOF)
4967 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4968
4969 if (lpfc_is_link_up(phba))
4970 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4971 else
4972 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4973
4974 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4975 abtsiocb->vport = vport;
4976 lpfc_cmd->waitq = &waitq;
4977 if (phba->sli_rev == LPFC_SLI_REV4) {
4978 /* Note: both hbalock and ring_lock must be set here */
4979 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4980 abtsiocb, 0);
4981 spin_unlock(&pring_s4->ring_lock);
4982 } else {
4983 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4984 abtsiocb, 0);
4985 }
4986 /* no longer need the lock after this point */
4987 spin_unlock_irqrestore(&phba->hbalock, flags);
4988
4989
4990 if (ret_val == IOCB_ERROR) {
4991 if (phba->sli_rev == LPFC_SLI_REV4)
4992 spin_lock_irqsave(&pring_s4->ring_lock, flags);
4993 else
4994 spin_lock_irqsave(&phba->hbalock, flags);
4995 /* Indicate the IO is not being aborted by the driver. */
4996 iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
4997 lpfc_cmd->waitq = NULL;
4998 if (phba->sli_rev == LPFC_SLI_REV4)
4999 spin_unlock_irqrestore(&pring_s4->ring_lock, flags);
5000 else
5001 spin_unlock_irqrestore(&phba->hbalock, flags);
5002 lpfc_sli_release_iocbq(phba, abtsiocb);
5003 ret = FAILED;
5004 goto out;
5005 }
5006
5007 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5008 lpfc_sli_handle_fast_ring_event(phba,
5009 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5010
5011 wait_for_cmpl:
5012 /* Wait for abort to complete */
5013 wait_event_timeout(waitq,
5014 (lpfc_cmd->pCmd != cmnd),
5015 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
5016
5017 spin_lock_irqsave(shost->host_lock, flags);
5018 lpfc_cmd->waitq = NULL;
5019 spin_unlock_irqrestore(shost->host_lock, flags);
5020
5021 if (lpfc_cmd->pCmd == cmnd) {
5022 ret = FAILED;
5023 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5024 "0748 abort handler timed out waiting "
5025 "for aborting I/O (xri:x%x) to complete: "
5026 "ret %#x, ID %d, LUN %llu\n",
5027 iocb->sli4_xritag, ret,
5028 cmnd->device->id, cmnd->device->lun);
5029 }
5030 goto out;
5031
5032 out_unlock:
5033 spin_unlock_irqrestore(&phba->hbalock, flags);
5034 out:
5035 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5036 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
5037 "LUN %llu\n", ret, cmnd->device->id,
5038 cmnd->device->lun);
5039 return ret;
5040 }
5041
5042 static char *
5043 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
5044 {
5045 switch (task_mgmt_cmd) {
5046 case FCP_ABORT_TASK_SET:
5047 return "ABORT_TASK_SET";
5048 case FCP_CLEAR_TASK_SET:
5049 return "FCP_CLEAR_TASK_SET";
5050 case FCP_BUS_RESET:
5051 return "FCP_BUS_RESET";
5052 case FCP_LUN_RESET:
5053 return "FCP_LUN_RESET";
5054 case FCP_TARGET_RESET:
5055 return "FCP_TARGET_RESET";
5056 case FCP_CLEAR_ACA:
5057 return "FCP_CLEAR_ACA";
5058 case FCP_TERMINATE_TASK:
5059 return "FCP_TERMINATE_TASK";
5060 default:
5061 return "unknown";
5062 }
5063 }
5064
5065
5066 /**
5067 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
5068 * @vport: The virtual port for which this call is being executed.
5069 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
5070 *
5071 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
5072 *
5073 * Return code :
5074 * 0x2003 - Error
5075 * 0x2002 - Success
5076 **/
5077 static int
5078 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
5079 {
5080 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
5081 uint32_t rsp_info;
5082 uint32_t rsp_len;
5083 uint8_t rsp_info_code;
5084 int ret = FAILED;
5085
5086
5087 if (fcprsp == NULL)
5088 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5089 "0703 fcp_rsp is missing\n");
5090 else {
5091 rsp_info = fcprsp->rspStatus2;
5092 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
5093 rsp_info_code = fcprsp->rspInfo3;
5094
5095
5096 lpfc_printf_vlog(vport, KERN_INFO,
5097 LOG_FCP,
5098 "0706 fcp_rsp valid 0x%x,"
5099 " rsp len=%d code 0x%x\n",
5100 rsp_info,
5101 rsp_len, rsp_info_code);
5102
5103 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
5104 switch (rsp_info_code) {
5105 case RSP_NO_FAILURE:
5106 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5107 "0715 Task Mgmt No Failure\n");
5108 ret = SUCCESS;
5109 break;
5110 case RSP_TM_NOT_SUPPORTED: /* TM rejected */
5111 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5112 "0716 Task Mgmt Target "
5113 "reject\n");
5114 break;
5115 case RSP_TM_NOT_COMPLETED: /* TM failed */
5116 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5117 "0717 Task Mgmt Target "
5118 "failed TM\n");
5119 break;
5120 case RSP_TM_INVALID_LU: /* TM to invalid LU! */
5121 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5122 "0718 Task Mgmt to invalid "
5123 "LUN\n");
5124 break;
5125 }
5126 }
5127 }
5128 return ret;
5129 }
5130
5131
5132 /**
5133 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5134 * @vport: The virtual port for which this call is being executed.
5135 * @rdata: Pointer to remote port local data
5136 * @tgt_id: Target ID of remote device.
5137 * @lun_id: Lun number for the TMF
5138 * @task_mgmt_cmd: type of TMF to send
5139 *
5140 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5141 * a remote port.
5142 *
5143 * Return Code:
5144 * 0x2003 - Error
5145 * 0x2002 - Success.
5146 **/
5147 static int
5148 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
5149 unsigned int tgt_id, uint64_t lun_id,
5150 uint8_t task_mgmt_cmd)
5151 {
5152 struct lpfc_hba *phba = vport->phba;
5153 struct lpfc_scsi_buf *lpfc_cmd;
5154 struct lpfc_iocbq *iocbq;
5155 struct lpfc_iocbq *iocbqrsp;
5156 struct lpfc_rport_data *rdata;
5157 struct lpfc_nodelist *pnode;
5158 int ret;
5159 int status;
5160
5161 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5162 if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5163 return FAILED;
5164 pnode = rdata->pnode;
5165
5166 lpfc_cmd = lpfc_get_scsi_buf(phba, pnode);
5167 if (lpfc_cmd == NULL)
5168 return FAILED;
5169 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5170 lpfc_cmd->rdata = rdata;
5171 lpfc_cmd->pCmd = cmnd;
5172 lpfc_cmd->ndlp = pnode;
5173
5174 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5175 task_mgmt_cmd);
5176 if (!status) {
5177 lpfc_release_scsi_buf(phba, lpfc_cmd);
5178 return FAILED;
5179 }
5180
5181 iocbq = &lpfc_cmd->cur_iocbq;
5182 iocbqrsp = lpfc_sli_get_iocbq(phba);
5183 if (iocbqrsp == NULL) {
5184 lpfc_release_scsi_buf(phba, lpfc_cmd);
5185 return FAILED;
5186 }
5187 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5188
5189 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5190 "0702 Issue %s to TGT %d LUN %llu "
5191 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5192 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5193 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5194 iocbq->iocb_flag);
5195
5196 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5197 iocbq, iocbqrsp, lpfc_cmd->timeout);
5198 if ((status != IOCB_SUCCESS) ||
5199 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5200 if (status != IOCB_SUCCESS ||
5201 iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5202 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5203 "0727 TMF %s to TGT %d LUN %llu "
5204 "failed (%d, %d) iocb_flag x%x\n",
5205 lpfc_taskmgmt_name(task_mgmt_cmd),
5206 tgt_id, lun_id,
5207 iocbqrsp->iocb.ulpStatus,
5208 iocbqrsp->iocb.un.ulpWord[4],
5209 iocbq->iocb_flag);
5210 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5211 if (status == IOCB_SUCCESS) {
5212 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5213 /* Something in the FCP_RSP was invalid.
5214 * Check conditions */
5215 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5216 else
5217 ret = FAILED;
5218 } else if (status == IOCB_TIMEDOUT) {
5219 ret = TIMEOUT_ERROR;
5220 } else {
5221 ret = FAILED;
5222 }
5223 } else
5224 ret = SUCCESS;
5225
5226 lpfc_sli_release_iocbq(phba, iocbqrsp);
5227
5228 if (ret != TIMEOUT_ERROR)
5229 lpfc_release_scsi_buf(phba, lpfc_cmd);
5230
5231 return ret;
5232 }
5233
5234 /**
5235 * lpfc_chk_tgt_mapped -
5236 * @vport: The virtual port to check on
5237 * @cmnd: Pointer to scsi_cmnd data structure.
5238 *
5239 * This routine delays until the scsi target (aka rport) for the
5240 * command exists (is present and logged in) or we declare it non-existent.
5241 *
5242 * Return code :
5243 * 0x2003 - Error
5244 * 0x2002 - Success
5245 **/
5246 static int
5247 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5248 {
5249 struct lpfc_rport_data *rdata;
5250 struct lpfc_nodelist *pnode;
5251 unsigned long later;
5252
5253 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5254 if (!rdata) {
5255 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5256 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5257 return FAILED;
5258 }
5259 pnode = rdata->pnode;
5260 /*
5261 * If target is not in a MAPPED state, delay until
5262 * target is rediscovered or devloss timeout expires.
5263 */
5264 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5265 while (time_after(later, jiffies)) {
5266 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5267 return FAILED;
5268 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5269 return SUCCESS;
5270 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5271 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5272 if (!rdata)
5273 return FAILED;
5274 pnode = rdata->pnode;
5275 }
5276 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5277 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5278 return FAILED;
5279 return SUCCESS;
5280 }
5281
5282 /**
5283 * lpfc_reset_flush_io_context -
5284 * @vport: The virtual port (scsi_host) for the flush context
5285 * @tgt_id: If aborting by Target contect - specifies the target id
5286 * @lun_id: If aborting by Lun context - specifies the lun id
5287 * @context: specifies the context level to flush at.
5288 *
5289 * After a reset condition via TMF, we need to flush orphaned i/o
5290 * contexts from the adapter. This routine aborts any contexts
5291 * outstanding, then waits for their completions. The wait is
5292 * bounded by devloss_tmo though.
5293 *
5294 * Return code :
5295 * 0x2003 - Error
5296 * 0x2002 - Success
5297 **/
5298 static int
5299 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5300 uint64_t lun_id, lpfc_ctx_cmd context)
5301 {
5302 struct lpfc_hba *phba = vport->phba;
5303 unsigned long later;
5304 int cnt;
5305
5306 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5307 if (cnt)
5308 lpfc_sli_abort_taskmgmt(vport,
5309 &phba->sli.sli3_ring[LPFC_FCP_RING],
5310 tgt_id, lun_id, context);
5311 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5312 while (time_after(later, jiffies) && cnt) {
5313 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5314 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5315 }
5316 if (cnt) {
5317 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5318 "0724 I/O flush failure for context %s : cnt x%x\n",
5319 ((context == LPFC_CTX_LUN) ? "LUN" :
5320 ((context == LPFC_CTX_TGT) ? "TGT" :
5321 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5322 cnt);
5323 return FAILED;
5324 }
5325 return SUCCESS;
5326 }
5327
5328 /**
5329 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5330 * @cmnd: Pointer to scsi_cmnd data structure.
5331 *
5332 * This routine does a device reset by sending a LUN_RESET task management
5333 * command.
5334 *
5335 * Return code :
5336 * 0x2003 - Error
5337 * 0x2002 - Success
5338 **/
5339 static int
5340 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5341 {
5342 struct Scsi_Host *shost = cmnd->device->host;
5343 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5344 struct lpfc_rport_data *rdata;
5345 struct lpfc_nodelist *pnode;
5346 unsigned tgt_id = cmnd->device->id;
5347 uint64_t lun_id = cmnd->device->lun;
5348 struct lpfc_scsi_event_header scsi_event;
5349 int status;
5350
5351 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5352 if (!rdata || !rdata->pnode) {
5353 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5354 "0798 Device Reset rport failure: rdata x%p\n",
5355 rdata);
5356 return FAILED;
5357 }
5358 pnode = rdata->pnode;
5359 status = fc_block_scsi_eh(cmnd);
5360 if (status != 0 && status != SUCCESS)
5361 return status;
5362
5363 status = lpfc_chk_tgt_mapped(vport, cmnd);
5364 if (status == FAILED) {
5365 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5366 "0721 Device Reset rport failure: rdata x%p\n", rdata);
5367 return FAILED;
5368 }
5369
5370 scsi_event.event_type = FC_REG_SCSI_EVENT;
5371 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5372 scsi_event.lun = lun_id;
5373 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5374 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5375
5376 fc_host_post_vendor_event(shost, fc_get_event_number(),
5377 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5378
5379 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5380 FCP_LUN_RESET);
5381
5382 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5383 "0713 SCSI layer issued Device Reset (%d, %llu) "
5384 "return x%x\n", tgt_id, lun_id, status);
5385
5386 /*
5387 * We have to clean up i/o as : they may be orphaned by the TMF;
5388 * or if the TMF failed, they may be in an indeterminate state.
5389 * So, continue on.
5390 * We will report success if all the i/o aborts successfully.
5391 */
5392 if (status == SUCCESS)
5393 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5394 LPFC_CTX_LUN);
5395
5396 return status;
5397 }
5398
5399 /**
5400 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5401 * @cmnd: Pointer to scsi_cmnd data structure.
5402 *
5403 * This routine does a target reset by sending a TARGET_RESET task management
5404 * command.
5405 *
5406 * Return code :
5407 * 0x2003 - Error
5408 * 0x2002 - Success
5409 **/
5410 static int
5411 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5412 {
5413 struct Scsi_Host *shost = cmnd->device->host;
5414 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5415 struct lpfc_rport_data *rdata;
5416 struct lpfc_nodelist *pnode;
5417 unsigned tgt_id = cmnd->device->id;
5418 uint64_t lun_id = cmnd->device->lun;
5419 struct lpfc_scsi_event_header scsi_event;
5420 int status;
5421
5422 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5423 if (!rdata) {
5424 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5425 "0799 Target Reset rport failure: rdata x%p\n", rdata);
5426 return FAILED;
5427 }
5428 pnode = rdata->pnode;
5429 status = fc_block_scsi_eh(cmnd);
5430 if (status != 0 && status != SUCCESS)
5431 return status;
5432
5433 status = lpfc_chk_tgt_mapped(vport, cmnd);
5434 if (status == FAILED) {
5435 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5436 "0722 Target Reset rport failure: rdata x%p\n", rdata);
5437 if (pnode) {
5438 spin_lock_irq(shost->host_lock);
5439 pnode->nlp_flag &= ~NLP_NPR_ADISC;
5440 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5441 spin_unlock_irq(shost->host_lock);
5442 }
5443 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5444 LPFC_CTX_TGT);
5445 return FAST_IO_FAIL;
5446 }
5447
5448 scsi_event.event_type = FC_REG_SCSI_EVENT;
5449 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5450 scsi_event.lun = 0;
5451 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5452 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5453
5454 fc_host_post_vendor_event(shost, fc_get_event_number(),
5455 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5456
5457 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5458 FCP_TARGET_RESET);
5459
5460 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5461 "0723 SCSI layer issued Target Reset (%d, %llu) "
5462 "return x%x\n", tgt_id, lun_id, status);
5463
5464 /*
5465 * We have to clean up i/o as : they may be orphaned by the TMF;
5466 * or if the TMF failed, they may be in an indeterminate state.
5467 * So, continue on.
5468 * We will report success if all the i/o aborts successfully.
5469 */
5470 if (status == SUCCESS)
5471 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5472 LPFC_CTX_TGT);
5473 return status;
5474 }
5475
5476 /**
5477 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5478 * @cmnd: Pointer to scsi_cmnd data structure.
5479 *
5480 * This routine does target reset to all targets on @cmnd->device->host.
5481 * This emulates Parallel SCSI Bus Reset Semantics.
5482 *
5483 * Return code :
5484 * 0x2003 - Error
5485 * 0x2002 - Success
5486 **/
5487 static int
5488 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5489 {
5490 struct Scsi_Host *shost = cmnd->device->host;
5491 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5492 struct lpfc_nodelist *ndlp = NULL;
5493 struct lpfc_scsi_event_header scsi_event;
5494 int match;
5495 int ret = SUCCESS, status, i;
5496
5497 scsi_event.event_type = FC_REG_SCSI_EVENT;
5498 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5499 scsi_event.lun = 0;
5500 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5501 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5502
5503 fc_host_post_vendor_event(shost, fc_get_event_number(),
5504 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5505
5506 status = fc_block_scsi_eh(cmnd);
5507 if (status != 0 && status != SUCCESS)
5508 return status;
5509
5510 /*
5511 * Since the driver manages a single bus device, reset all
5512 * targets known to the driver. Should any target reset
5513 * fail, this routine returns failure to the midlayer.
5514 */
5515 for (i = 0; i < LPFC_MAX_TARGET; i++) {
5516 /* Search for mapped node by target ID */
5517 match = 0;
5518 spin_lock_irq(shost->host_lock);
5519 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5520 if (!NLP_CHK_NODE_ACT(ndlp))
5521 continue;
5522 if (vport->phba->cfg_fcp2_no_tgt_reset &&
5523 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5524 continue;
5525 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5526 ndlp->nlp_sid == i &&
5527 ndlp->rport &&
5528 ndlp->nlp_type & NLP_FCP_TARGET) {
5529 match = 1;
5530 break;
5531 }
5532 }
5533 spin_unlock_irq(shost->host_lock);
5534 if (!match)
5535 continue;
5536
5537 status = lpfc_send_taskmgmt(vport, cmnd,
5538 i, 0, FCP_TARGET_RESET);
5539
5540 if (status != SUCCESS) {
5541 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5542 "0700 Bus Reset on target %d failed\n",
5543 i);
5544 ret = FAILED;
5545 }
5546 }
5547 /*
5548 * We have to clean up i/o as : they may be orphaned by the TMFs
5549 * above; or if any of the TMFs failed, they may be in an
5550 * indeterminate state.
5551 * We will report success if all the i/o aborts successfully.
5552 */
5553
5554 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5555 if (status != SUCCESS)
5556 ret = FAILED;
5557
5558 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5559 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5560 return ret;
5561 }
5562
5563 /**
5564 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5565 * @cmnd: Pointer to scsi_cmnd data structure.
5566 *
5567 * This routine does host reset to the adaptor port. It brings the HBA
5568 * offline, performs a board restart, and then brings the board back online.
5569 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5570 * reject all outstanding SCSI commands to the host and error returned
5571 * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5572 * of error handling, it will only return error if resetting of the adapter
5573 * is not successful; in all other cases, will return success.
5574 *
5575 * Return code :
5576 * 0x2003 - Error
5577 * 0x2002 - Success
5578 **/
5579 static int
5580 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5581 {
5582 struct Scsi_Host *shost = cmnd->device->host;
5583 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5584 struct lpfc_hba *phba = vport->phba;
5585 int rc, ret = SUCCESS;
5586
5587 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5588 "3172 SCSI layer issued Host Reset Data:\n");
5589
5590 lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5591 lpfc_offline(phba);
5592 rc = lpfc_sli_brdrestart(phba);
5593 if (rc)
5594 ret = FAILED;
5595 rc = lpfc_online(phba);
5596 if (rc)
5597 ret = FAILED;
5598 lpfc_unblock_mgmt_io(phba);
5599
5600 if (ret == FAILED) {
5601 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5602 "3323 Failed host reset, bring it offline\n");
5603 lpfc_sli4_offline_eratt(phba);
5604 }
5605 return ret;
5606 }
5607
5608 /**
5609 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5610 * @sdev: Pointer to scsi_device.
5611 *
5612 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
5613 * globally available list of scsi buffers. This routine also makes sure scsi
5614 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5615 * of scsi buffer exists for the lifetime of the driver.
5616 *
5617 * Return codes:
5618 * non-0 - Error
5619 * 0 - Success
5620 **/
5621 static int
5622 lpfc_slave_alloc(struct scsi_device *sdev)
5623 {
5624 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5625 struct lpfc_hba *phba = vport->phba;
5626 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5627 uint32_t total = 0;
5628 uint32_t num_to_alloc = 0;
5629 int num_allocated = 0;
5630 uint32_t sdev_cnt;
5631 struct lpfc_device_data *device_data;
5632 unsigned long flags;
5633 struct lpfc_name target_wwpn;
5634
5635 if (!rport || fc_remote_port_chkready(rport))
5636 return -ENXIO;
5637
5638 if (phba->cfg_fof) {
5639
5640 /*
5641 * Check to see if the device data structure for the lun
5642 * exists. If not, create one.
5643 */
5644
5645 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5646 spin_lock_irqsave(&phba->devicelock, flags);
5647 device_data = __lpfc_get_device_data(phba,
5648 &phba->luns,
5649 &vport->fc_portname,
5650 &target_wwpn,
5651 sdev->lun);
5652 if (!device_data) {
5653 spin_unlock_irqrestore(&phba->devicelock, flags);
5654 device_data = lpfc_create_device_data(phba,
5655 &vport->fc_portname,
5656 &target_wwpn,
5657 sdev->lun,
5658 phba->cfg_XLanePriority,
5659 true);
5660 if (!device_data)
5661 return -ENOMEM;
5662 spin_lock_irqsave(&phba->devicelock, flags);
5663 list_add_tail(&device_data->listentry, &phba->luns);
5664 }
5665 device_data->rport_data = rport->dd_data;
5666 device_data->available = true;
5667 spin_unlock_irqrestore(&phba->devicelock, flags);
5668 sdev->hostdata = device_data;
5669 } else {
5670 sdev->hostdata = rport->dd_data;
5671 }
5672 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5673
5674 /*
5675 * Populate the cmds_per_lun count scsi_bufs into this host's globally
5676 * available list of scsi buffers. Don't allocate more than the
5677 * HBA limit conveyed to the midlayer via the host structure. The
5678 * formula accounts for the lun_queue_depth + error handlers + 1
5679 * extra. This list of scsi bufs exists for the lifetime of the driver.
5680 */
5681 total = phba->total_scsi_bufs;
5682 num_to_alloc = vport->cfg_lun_queue_depth + 2;
5683
5684 /* If allocated buffers are enough do nothing */
5685 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5686 return 0;
5687
5688 /* Allow some exchanges to be available always to complete discovery */
5689 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5690 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5691 "0704 At limitation of %d preallocated "
5692 "command buffers\n", total);
5693 return 0;
5694 /* Allow some exchanges to be available always to complete discovery */
5695 } else if (total + num_to_alloc >
5696 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5697 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5698 "0705 Allocation request of %d "
5699 "command buffers will exceed max of %d. "
5700 "Reducing allocation request to %d.\n",
5701 num_to_alloc, phba->cfg_hba_queue_depth,
5702 (phba->cfg_hba_queue_depth - total));
5703 num_to_alloc = phba->cfg_hba_queue_depth - total;
5704 }
5705 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5706 if (num_to_alloc != num_allocated) {
5707 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5708 "0708 Allocation request of %d "
5709 "command buffers did not succeed. "
5710 "Allocated %d buffers.\n",
5711 num_to_alloc, num_allocated);
5712 }
5713 if (num_allocated > 0)
5714 phba->total_scsi_bufs += num_allocated;
5715 return 0;
5716 }
5717
5718 /**
5719 * lpfc_slave_configure - scsi_host_template slave_configure entry point
5720 * @sdev: Pointer to scsi_device.
5721 *
5722 * This routine configures following items
5723 * - Tag command queuing support for @sdev if supported.
5724 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5725 *
5726 * Return codes:
5727 * 0 - Success
5728 **/
5729 static int
5730 lpfc_slave_configure(struct scsi_device *sdev)
5731 {
5732 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5733 struct lpfc_hba *phba = vport->phba;
5734
5735 scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5736
5737 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5738 lpfc_sli_handle_fast_ring_event(phba,
5739 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5740 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5741 lpfc_poll_rearm_timer(phba);
5742 }
5743
5744 return 0;
5745 }
5746
5747 /**
5748 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5749 * @sdev: Pointer to scsi_device.
5750 *
5751 * This routine sets @sdev hostatdata filed to null.
5752 **/
5753 static void
5754 lpfc_slave_destroy(struct scsi_device *sdev)
5755 {
5756 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5757 struct lpfc_hba *phba = vport->phba;
5758 unsigned long flags;
5759 struct lpfc_device_data *device_data = sdev->hostdata;
5760
5761 atomic_dec(&phba->sdev_cnt);
5762 if ((phba->cfg_fof) && (device_data)) {
5763 spin_lock_irqsave(&phba->devicelock, flags);
5764 device_data->available = false;
5765 if (!device_data->oas_enabled)
5766 lpfc_delete_device_data(phba, device_data);
5767 spin_unlock_irqrestore(&phba->devicelock, flags);
5768 }
5769 sdev->hostdata = NULL;
5770 return;
5771 }
5772
5773 /**
5774 * lpfc_create_device_data - creates and initializes device data structure for OAS
5775 * @pha: Pointer to host bus adapter structure.
5776 * @vport_wwpn: Pointer to vport's wwpn information
5777 * @target_wwpn: Pointer to target's wwpn information
5778 * @lun: Lun on target
5779 * @atomic_create: Flag to indicate if memory should be allocated using the
5780 * GFP_ATOMIC flag or not.
5781 *
5782 * This routine creates a device data structure which will contain identifying
5783 * information for the device (host wwpn, target wwpn, lun), state of OAS,
5784 * whether or not the corresponding lun is available by the system,
5785 * and pointer to the rport data.
5786 *
5787 * Return codes:
5788 * NULL - Error
5789 * Pointer to lpfc_device_data - Success
5790 **/
5791 struct lpfc_device_data*
5792 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5793 struct lpfc_name *target_wwpn, uint64_t lun,
5794 uint32_t pri, bool atomic_create)
5795 {
5796
5797 struct lpfc_device_data *lun_info;
5798 int memory_flags;
5799
5800 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5801 !(phba->cfg_fof))
5802 return NULL;
5803
5804 /* Attempt to create the device data to contain lun info */
5805
5806 if (atomic_create)
5807 memory_flags = GFP_ATOMIC;
5808 else
5809 memory_flags = GFP_KERNEL;
5810 lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5811 if (!lun_info)
5812 return NULL;
5813 INIT_LIST_HEAD(&lun_info->listentry);
5814 lun_info->rport_data = NULL;
5815 memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5816 sizeof(struct lpfc_name));
5817 memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5818 sizeof(struct lpfc_name));
5819 lun_info->device_id.lun = lun;
5820 lun_info->oas_enabled = false;
5821 lun_info->priority = pri;
5822 lun_info->available = false;
5823 return lun_info;
5824 }
5825
5826 /**
5827 * lpfc_delete_device_data - frees a device data structure for OAS
5828 * @pha: Pointer to host bus adapter structure.
5829 * @lun_info: Pointer to device data structure to free.
5830 *
5831 * This routine frees the previously allocated device data structure passed.
5832 *
5833 **/
5834 void
5835 lpfc_delete_device_data(struct lpfc_hba *phba,
5836 struct lpfc_device_data *lun_info)
5837 {
5838
5839 if (unlikely(!phba) || !lun_info ||
5840 !(phba->cfg_fof))
5841 return;
5842
5843 if (!list_empty(&lun_info->listentry))
5844 list_del(&lun_info->listentry);
5845 mempool_free(lun_info, phba->device_data_mem_pool);
5846 return;
5847 }
5848
5849 /**
5850 * __lpfc_get_device_data - returns the device data for the specified lun
5851 * @pha: Pointer to host bus adapter structure.
5852 * @list: Point to list to search.
5853 * @vport_wwpn: Pointer to vport's wwpn information
5854 * @target_wwpn: Pointer to target's wwpn information
5855 * @lun: Lun on target
5856 *
5857 * This routine searches the list passed for the specified lun's device data.
5858 * This function does not hold locks, it is the responsibility of the caller
5859 * to ensure the proper lock is held before calling the function.
5860 *
5861 * Return codes:
5862 * NULL - Error
5863 * Pointer to lpfc_device_data - Success
5864 **/
5865 struct lpfc_device_data*
5866 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5867 struct lpfc_name *vport_wwpn,
5868 struct lpfc_name *target_wwpn, uint64_t lun)
5869 {
5870
5871 struct lpfc_device_data *lun_info;
5872
5873 if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5874 !phba->cfg_fof)
5875 return NULL;
5876
5877 /* Check to see if the lun is already enabled for OAS. */
5878
5879 list_for_each_entry(lun_info, list, listentry) {
5880 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5881 sizeof(struct lpfc_name)) == 0) &&
5882 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5883 sizeof(struct lpfc_name)) == 0) &&
5884 (lun_info->device_id.lun == lun))
5885 return lun_info;
5886 }
5887
5888 return NULL;
5889 }
5890
5891 /**
5892 * lpfc_find_next_oas_lun - searches for the next oas lun
5893 * @pha: Pointer to host bus adapter structure.
5894 * @vport_wwpn: Pointer to vport's wwpn information
5895 * @target_wwpn: Pointer to target's wwpn information
5896 * @starting_lun: Pointer to the lun to start searching for
5897 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5898 * @found_target_wwpn: Pointer to the found lun's target wwpn information
5899 * @found_lun: Pointer to the found lun.
5900 * @found_lun_status: Pointer to status of the found lun.
5901 *
5902 * This routine searches the luns list for the specified lun
5903 * or the first lun for the vport/target. If the vport wwpn contains
5904 * a zero value then a specific vport is not specified. In this case
5905 * any vport which contains the lun will be considered a match. If the
5906 * target wwpn contains a zero value then a specific target is not specified.
5907 * In this case any target which contains the lun will be considered a
5908 * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status
5909 * are returned. The function will also return the next lun if available.
5910 * If the next lun is not found, starting_lun parameter will be set to
5911 * NO_MORE_OAS_LUN.
5912 *
5913 * Return codes:
5914 * non-0 - Error
5915 * 0 - Success
5916 **/
5917 bool
5918 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5919 struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5920 struct lpfc_name *found_vport_wwpn,
5921 struct lpfc_name *found_target_wwpn,
5922 uint64_t *found_lun,
5923 uint32_t *found_lun_status,
5924 uint32_t *found_lun_pri)
5925 {
5926
5927 unsigned long flags;
5928 struct lpfc_device_data *lun_info;
5929 struct lpfc_device_id *device_id;
5930 uint64_t lun;
5931 bool found = false;
5932
5933 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5934 !starting_lun || !found_vport_wwpn ||
5935 !found_target_wwpn || !found_lun || !found_lun_status ||
5936 (*starting_lun == NO_MORE_OAS_LUN) ||
5937 !phba->cfg_fof)
5938 return false;
5939
5940 lun = *starting_lun;
5941 *found_lun = NO_MORE_OAS_LUN;
5942 *starting_lun = NO_MORE_OAS_LUN;
5943
5944 /* Search for lun or the lun closet in value */
5945
5946 spin_lock_irqsave(&phba->devicelock, flags);
5947 list_for_each_entry(lun_info, &phba->luns, listentry) {
5948 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5949 (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5950 sizeof(struct lpfc_name)) == 0)) &&
5951 ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5952 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5953 sizeof(struct lpfc_name)) == 0)) &&
5954 (lun_info->oas_enabled)) {
5955 device_id = &lun_info->device_id;
5956 if ((!found) &&
5957 ((lun == FIND_FIRST_OAS_LUN) ||
5958 (device_id->lun == lun))) {
5959 *found_lun = device_id->lun;
5960 memcpy(found_vport_wwpn,
5961 &device_id->vport_wwpn,
5962 sizeof(struct lpfc_name));
5963 memcpy(found_target_wwpn,
5964 &device_id->target_wwpn,
5965 sizeof(struct lpfc_name));
5966 if (lun_info->available)
5967 *found_lun_status =
5968 OAS_LUN_STATUS_EXISTS;
5969 else
5970 *found_lun_status = 0;
5971 *found_lun_pri = lun_info->priority;
5972 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5973 memset(vport_wwpn, 0x0,
5974 sizeof(struct lpfc_name));
5975 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5976 memset(target_wwpn, 0x0,
5977 sizeof(struct lpfc_name));
5978 found = true;
5979 } else if (found) {
5980 *starting_lun = device_id->lun;
5981 memcpy(vport_wwpn, &device_id->vport_wwpn,
5982 sizeof(struct lpfc_name));
5983 memcpy(target_wwpn, &device_id->target_wwpn,
5984 sizeof(struct lpfc_name));
5985 break;
5986 }
5987 }
5988 }
5989 spin_unlock_irqrestore(&phba->devicelock, flags);
5990 return found;
5991 }
5992
5993 /**
5994 * lpfc_enable_oas_lun - enables a lun for OAS operations
5995 * @pha: Pointer to host bus adapter structure.
5996 * @vport_wwpn: Pointer to vport's wwpn information
5997 * @target_wwpn: Pointer to target's wwpn information
5998 * @lun: Lun
5999 *
6000 * This routine enables a lun for oas operations. The routines does so by
6001 * doing the following :
6002 *
6003 * 1) Checks to see if the device data for the lun has been created.
6004 * 2) If found, sets the OAS enabled flag if not set and returns.
6005 * 3) Otherwise, creates a device data structure.
6006 * 4) If successfully created, indicates the device data is for an OAS lun,
6007 * indicates the lun is not available and add to the list of luns.
6008 *
6009 * Return codes:
6010 * false - Error
6011 * true - Success
6012 **/
6013 bool
6014 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
6015 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
6016 {
6017
6018 struct lpfc_device_data *lun_info;
6019 unsigned long flags;
6020
6021 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
6022 !phba->cfg_fof)
6023 return false;
6024
6025 spin_lock_irqsave(&phba->devicelock, flags);
6026
6027 /* Check to see if the device data for the lun has been created */
6028 lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
6029 target_wwpn, lun);
6030 if (lun_info) {
6031 if (!lun_info->oas_enabled)
6032 lun_info->oas_enabled = true;
6033 lun_info->priority = pri;
6034 spin_unlock_irqrestore(&phba->devicelock, flags);
6035 return true;
6036 }
6037
6038 /* Create an lun info structure and add to list of luns */
6039 lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
6040 pri, false);
6041 if (lun_info) {
6042 lun_info->oas_enabled = true;
6043 lun_info->priority = pri;
6044 lun_info->available = false;
6045 list_add_tail(&lun_info->listentry, &phba->luns);
6046 spin_unlock_irqrestore(&phba->devicelock, flags);
6047 return true;
6048 }
6049 spin_unlock_irqrestore(&phba->devicelock, flags);
6050 return false;
6051 }
6052
6053 /**
6054 * lpfc_disable_oas_lun - disables a lun for OAS operations
6055 * @pha: Pointer to host bus adapter structure.
6056 * @vport_wwpn: Pointer to vport's wwpn information
6057 * @target_wwpn: Pointer to target's wwpn information
6058 * @lun: Lun
6059 *
6060 * This routine disables a lun for oas operations. The routines does so by
6061 * doing the following :
6062 *
6063 * 1) Checks to see if the device data for the lun is created.
6064 * 2) If present, clears the flag indicating this lun is for OAS.
6065 * 3) If the lun is not available by the system, the device data is
6066 * freed.
6067 *
6068 * Return codes:
6069 * false - Error
6070 * true - Success
6071 **/
6072 bool
6073 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
6074 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
6075 {
6076
6077 struct lpfc_device_data *lun_info;
6078 unsigned long flags;
6079
6080 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
6081 !phba->cfg_fof)
6082 return false;
6083
6084 spin_lock_irqsave(&phba->devicelock, flags);
6085
6086 /* Check to see if the lun is available. */
6087 lun_info = __lpfc_get_device_data(phba,
6088 &phba->luns, vport_wwpn,
6089 target_wwpn, lun);
6090 if (lun_info) {
6091 lun_info->oas_enabled = false;
6092 lun_info->priority = pri;
6093 if (!lun_info->available)
6094 lpfc_delete_device_data(phba, lun_info);
6095 spin_unlock_irqrestore(&phba->devicelock, flags);
6096 return true;
6097 }
6098
6099 spin_unlock_irqrestore(&phba->devicelock, flags);
6100 return false;
6101 }
6102
6103 static int
6104 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
6105 {
6106 return SCSI_MLQUEUE_HOST_BUSY;
6107 }
6108
6109 static int
6110 lpfc_no_handler(struct scsi_cmnd *cmnd)
6111 {
6112 return FAILED;
6113 }
6114
6115 static int
6116 lpfc_no_slave(struct scsi_device *sdev)
6117 {
6118 return -ENODEV;
6119 }
6120
6121 struct scsi_host_template lpfc_template_nvme = {
6122 .module = THIS_MODULE,
6123 .name = LPFC_DRIVER_NAME,
6124 .proc_name = LPFC_DRIVER_NAME,
6125 .info = lpfc_info,
6126 .queuecommand = lpfc_no_command,
6127 .eh_abort_handler = lpfc_no_handler,
6128 .eh_device_reset_handler = lpfc_no_handler,
6129 .eh_target_reset_handler = lpfc_no_handler,
6130 .eh_bus_reset_handler = lpfc_no_handler,
6131 .eh_host_reset_handler = lpfc_no_handler,
6132 .slave_alloc = lpfc_no_slave,
6133 .slave_configure = lpfc_no_slave,
6134 .scan_finished = lpfc_scan_finished,
6135 .this_id = -1,
6136 .sg_tablesize = 1,
6137 .cmd_per_lun = 1,
6138 .shost_attrs = lpfc_hba_attrs,
6139 .max_sectors = 0xFFFF,
6140 .vendor_id = LPFC_NL_VENDOR_ID,
6141 .track_queue_depth = 0,
6142 };
6143
6144 struct scsi_host_template lpfc_template_no_hr = {
6145 .module = THIS_MODULE,
6146 .name = LPFC_DRIVER_NAME,
6147 .proc_name = LPFC_DRIVER_NAME,
6148 .info = lpfc_info,
6149 .queuecommand = lpfc_queuecommand,
6150 .eh_timed_out = fc_eh_timed_out,
6151 .eh_abort_handler = lpfc_abort_handler,
6152 .eh_device_reset_handler = lpfc_device_reset_handler,
6153 .eh_target_reset_handler = lpfc_target_reset_handler,
6154 .eh_bus_reset_handler = lpfc_bus_reset_handler,
6155 .slave_alloc = lpfc_slave_alloc,
6156 .slave_configure = lpfc_slave_configure,
6157 .slave_destroy = lpfc_slave_destroy,
6158 .scan_finished = lpfc_scan_finished,
6159 .this_id = -1,
6160 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
6161 .cmd_per_lun = LPFC_CMD_PER_LUN,
6162 .shost_attrs = lpfc_hba_attrs,
6163 .max_sectors = 0xFFFF,
6164 .vendor_id = LPFC_NL_VENDOR_ID,
6165 .change_queue_depth = scsi_change_queue_depth,
6166 .track_queue_depth = 1,
6167 };
6168
6169 struct scsi_host_template lpfc_template = {
6170 .module = THIS_MODULE,
6171 .name = LPFC_DRIVER_NAME,
6172 .proc_name = LPFC_DRIVER_NAME,
6173 .info = lpfc_info,
6174 .queuecommand = lpfc_queuecommand,
6175 .eh_timed_out = fc_eh_timed_out,
6176 .eh_abort_handler = lpfc_abort_handler,
6177 .eh_device_reset_handler = lpfc_device_reset_handler,
6178 .eh_target_reset_handler = lpfc_target_reset_handler,
6179 .eh_bus_reset_handler = lpfc_bus_reset_handler,
6180 .eh_host_reset_handler = lpfc_host_reset_handler,
6181 .slave_alloc = lpfc_slave_alloc,
6182 .slave_configure = lpfc_slave_configure,
6183 .slave_destroy = lpfc_slave_destroy,
6184 .scan_finished = lpfc_scan_finished,
6185 .this_id = -1,
6186 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
6187 .cmd_per_lun = LPFC_CMD_PER_LUN,
6188 .shost_attrs = lpfc_hba_attrs,
6189 .max_sectors = 0xFFFF,
6190 .vendor_id = LPFC_NL_VENDOR_ID,
6191 .change_queue_depth = scsi_change_queue_depth,
6192 .track_queue_depth = 1,
6193 };
6194
6195 struct scsi_host_template lpfc_vport_template = {
6196 .module = THIS_MODULE,
6197 .name = LPFC_DRIVER_NAME,
6198 .proc_name = LPFC_DRIVER_NAME,
6199 .info = lpfc_info,
6200 .queuecommand = lpfc_queuecommand,
6201 .eh_timed_out = fc_eh_timed_out,
6202 .eh_abort_handler = lpfc_abort_handler,
6203 .eh_device_reset_handler = lpfc_device_reset_handler,
6204 .eh_target_reset_handler = lpfc_target_reset_handler,
6205 .slave_alloc = lpfc_slave_alloc,
6206 .slave_configure = lpfc_slave_configure,
6207 .slave_destroy = lpfc_slave_destroy,
6208 .scan_finished = lpfc_scan_finished,
6209 .this_id = -1,
6210 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
6211 .cmd_per_lun = LPFC_CMD_PER_LUN,
6212 .shost_attrs = lpfc_vport_attrs,
6213 .max_sectors = 0xFFFF,
6214 .change_queue_depth = scsi_change_queue_depth,
6215 .track_queue_depth = 1,
6216 };
Linux with added FPC-III support