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Linux 4.16.11
[linux/fpc-iii.git] / drivers / scsi / lpfc / lpfc_scsi.c
blobc0cdaef4db24f1f124709d9ff3b0e9fcbcfbf361
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Limited 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 = lpfc_cmd->rdata;
206 struct lpfc_nodelist *pnode = rdata->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 (cmd->result)
215 return;
216
217 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
218
219 spin_lock_irqsave(shost->host_lock, flags);
220 if (!vport->stat_data_enabled ||
221 vport->stat_data_blocked ||
222 !pnode ||
223 !pnode->lat_data ||
224 (phba->bucket_type == LPFC_NO_BUCKET)) {
225 spin_unlock_irqrestore(shost->host_lock, flags);
226 return;
227 }
228
229 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
230 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
231 phba->bucket_step;
232 /* check array subscript bounds */
233 if (i < 0)
234 i = 0;
235 else if (i >= LPFC_MAX_BUCKET_COUNT)
236 i = LPFC_MAX_BUCKET_COUNT - 1;
237 } else {
238 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
239 if (latency <= (phba->bucket_base +
240 ((1<<i)*phba->bucket_step)))
241 break;
242 }
243
244 pnode->lat_data[i].cmd_count++;
245 spin_unlock_irqrestore(shost->host_lock, flags);
246 }
247
248 /**
249 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
250 * @phba: The Hba for which this call is being executed.
251 *
252 * This routine is called when there is resource error in driver or firmware.
253 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
254 * posts at most 1 event each second. This routine wakes up worker thread of
255 * @phba to process WORKER_RAM_DOWN_EVENT event.
256 *
257 * This routine should be called with no lock held.
258 **/
259 void
260 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
261 {
262 unsigned long flags;
263 uint32_t evt_posted;
264 unsigned long expires;
265
266 spin_lock_irqsave(&phba->hbalock, flags);
267 atomic_inc(&phba->num_rsrc_err);
268 phba->last_rsrc_error_time = jiffies;
269
270 expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
271 if (time_after(expires, jiffies)) {
272 spin_unlock_irqrestore(&phba->hbalock, flags);
273 return;
274 }
275
276 phba->last_ramp_down_time = jiffies;
277
278 spin_unlock_irqrestore(&phba->hbalock, flags);
279
280 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
281 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
282 if (!evt_posted)
283 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
284 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
285
286 if (!evt_posted)
287 lpfc_worker_wake_up(phba);
288 return;
289 }
290
291 /**
292 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
293 * @phba: The Hba for which this call is being executed.
294 *
295 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
296 * thread.This routine reduces queue depth for all scsi device on each vport
297 * associated with @phba.
298 **/
299 void
300 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
301 {
302 struct lpfc_vport **vports;
303 struct Scsi_Host *shost;
304 struct scsi_device *sdev;
305 unsigned long new_queue_depth;
306 unsigned long num_rsrc_err, num_cmd_success;
307 int i;
308
309 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
310 num_cmd_success = atomic_read(&phba->num_cmd_success);
311
312 /*
313 * The error and success command counters are global per
314 * driver instance. If another handler has already
315 * operated on this error event, just exit.
316 */
317 if (num_rsrc_err == 0)
318 return;
319
320 vports = lpfc_create_vport_work_array(phba);
321 if (vports != NULL)
322 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
323 shost = lpfc_shost_from_vport(vports[i]);
324 shost_for_each_device(sdev, shost) {
325 new_queue_depth =
326 sdev->queue_depth * num_rsrc_err /
327 (num_rsrc_err + num_cmd_success);
328 if (!new_queue_depth)
329 new_queue_depth = sdev->queue_depth - 1;
330 else
331 new_queue_depth = sdev->queue_depth -
332 new_queue_depth;
333 scsi_change_queue_depth(sdev, new_queue_depth);
334 }
335 }
336 lpfc_destroy_vport_work_array(phba, vports);
337 atomic_set(&phba->num_rsrc_err, 0);
338 atomic_set(&phba->num_cmd_success, 0);
339 }
340
341 /**
342 * lpfc_scsi_dev_block - set all scsi hosts to block state
343 * @phba: Pointer to HBA context object.
344 *
345 * This function walks vport list and set each SCSI host to block state
346 * by invoking fc_remote_port_delete() routine. This function is invoked
347 * with EEH when device's PCI slot has been permanently disabled.
348 **/
349 void
350 lpfc_scsi_dev_block(struct lpfc_hba *phba)
351 {
352 struct lpfc_vport **vports;
353 struct Scsi_Host *shost;
354 struct scsi_device *sdev;
355 struct fc_rport *rport;
356 int i;
357
358 vports = lpfc_create_vport_work_array(phba);
359 if (vports != NULL)
360 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
361 shost = lpfc_shost_from_vport(vports[i]);
362 shost_for_each_device(sdev, shost) {
363 rport = starget_to_rport(scsi_target(sdev));
364 fc_remote_port_delete(rport);
365 }
366 }
367 lpfc_destroy_vport_work_array(phba, vports);
368 }
369
370 /**
371 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
372 * @vport: The virtual port for which this call being executed.
373 * @num_to_allocate: The requested number of buffers to allocate.
374 *
375 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
376 * the scsi buffer contains all the necessary information needed to initiate
377 * a SCSI I/O. The non-DMAable buffer region contains information to build
378 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
379 * and the initial BPL. In addition to allocating memory, the FCP CMND and
380 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
381 *
382 * Return codes:
383 * int - number of scsi buffers that were allocated.
384 * 0 = failure, less than num_to_alloc is a partial failure.
385 **/
386 static int
387 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
388 {
389 struct lpfc_hba *phba = vport->phba;
390 struct lpfc_scsi_buf *psb;
391 struct ulp_bde64 *bpl;
392 IOCB_t *iocb;
393 dma_addr_t pdma_phys_fcp_cmd;
394 dma_addr_t pdma_phys_fcp_rsp;
395 dma_addr_t pdma_phys_bpl;
396 uint16_t iotag;
397 int bcnt, bpl_size;
398
399 bpl_size = phba->cfg_sg_dma_buf_size -
400 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
401
402 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
403 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
404 num_to_alloc, phba->cfg_sg_dma_buf_size,
405 (int)sizeof(struct fcp_cmnd),
406 (int)sizeof(struct fcp_rsp), bpl_size);
407
408 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
409 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
410 if (!psb)
411 break;
412
413 /*
414 * Get memory from the pci pool to map the virt space to pci
415 * bus space for an I/O. The DMA buffer includes space for the
416 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
417 * necessary to support the sg_tablesize.
418 */
419 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
420 GFP_KERNEL, &psb->dma_handle);
421 if (!psb->data) {
422 kfree(psb);
423 break;
424 }
425
426
427 /* Allocate iotag for psb->cur_iocbq. */
428 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
429 if (iotag == 0) {
430 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
431 psb->data, psb->dma_handle);
432 kfree(psb);
433 break;
434 }
435 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
436
437 psb->fcp_cmnd = psb->data;
438 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
439 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
440 sizeof(struct fcp_rsp);
441
442 /* Initialize local short-hand pointers. */
443 bpl = psb->fcp_bpl;
444 pdma_phys_fcp_cmd = psb->dma_handle;
445 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
446 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
447 sizeof(struct fcp_rsp);
448
449 /*
450 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
451 * are sg list bdes. Initialize the first two and leave the
452 * rest for queuecommand.
453 */
454 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
455 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
456 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
457 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
458 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
459
460 /* Setup the physical region for the FCP RSP */
461 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
462 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
463 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
464 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
465 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
466
467 /*
468 * Since the IOCB for the FCP I/O is built into this
469 * lpfc_scsi_buf, initialize it with all known data now.
470 */
471 iocb = &psb->cur_iocbq.iocb;
472 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
473 if ((phba->sli_rev == 3) &&
474 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
475 /* fill in immediate fcp command BDE */
476 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
477 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
478 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
479 unsli3.fcp_ext.icd);
480 iocb->un.fcpi64.bdl.addrHigh = 0;
481 iocb->ulpBdeCount = 0;
482 iocb->ulpLe = 0;
483 /* fill in response BDE */
484 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
485 BUFF_TYPE_BDE_64;
486 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
487 sizeof(struct fcp_rsp);
488 iocb->unsli3.fcp_ext.rbde.addrLow =
489 putPaddrLow(pdma_phys_fcp_rsp);
490 iocb->unsli3.fcp_ext.rbde.addrHigh =
491 putPaddrHigh(pdma_phys_fcp_rsp);
492 } else {
493 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
494 iocb->un.fcpi64.bdl.bdeSize =
495 (2 * sizeof(struct ulp_bde64));
496 iocb->un.fcpi64.bdl.addrLow =
497 putPaddrLow(pdma_phys_bpl);
498 iocb->un.fcpi64.bdl.addrHigh =
499 putPaddrHigh(pdma_phys_bpl);
500 iocb->ulpBdeCount = 1;
501 iocb->ulpLe = 1;
502 }
503 iocb->ulpClass = CLASS3;
504 psb->status = IOSTAT_SUCCESS;
505 /* Put it back into the SCSI buffer list */
506 psb->cur_iocbq.context1 = psb;
507 lpfc_release_scsi_buf_s3(phba, psb);
508
509 }
510
511 return bcnt;
512 }
513
514 /**
515 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
516 * @vport: pointer to lpfc vport data structure.
517 *
518 * This routine is invoked by the vport cleanup for deletions and the cleanup
519 * for an ndlp on removal.
520 **/
521 void
522 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
523 {
524 struct lpfc_hba *phba = vport->phba;
525 struct lpfc_scsi_buf *psb, *next_psb;
526 unsigned long iflag = 0;
527
528 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
529 return;
530 spin_lock_irqsave(&phba->hbalock, iflag);
531 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
532 list_for_each_entry_safe(psb, next_psb,
533 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
534 if (psb->rdata && psb->rdata->pnode
535 && psb->rdata->pnode->vport == vport)
536 psb->rdata = NULL;
537 }
538 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
539 spin_unlock_irqrestore(&phba->hbalock, iflag);
540 }
541
542 /**
543 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
544 * @phba: pointer to lpfc hba data structure.
545 * @axri: pointer to the fcp xri abort wcqe structure.
546 *
547 * This routine is invoked by the worker thread to process a SLI4 fast-path
548 * FCP aborted xri.
549 **/
550 void
551 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
552 struct sli4_wcqe_xri_aborted *axri)
553 {
554 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
555 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
556 struct lpfc_scsi_buf *psb, *next_psb;
557 unsigned long iflag = 0;
558 struct lpfc_iocbq *iocbq;
559 int i;
560 struct lpfc_nodelist *ndlp;
561 int rrq_empty = 0;
562 struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
563
564 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
565 return;
566 spin_lock_irqsave(&phba->hbalock, iflag);
567 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
568 list_for_each_entry_safe(psb, next_psb,
569 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
570 if (psb->cur_iocbq.sli4_xritag == xri) {
571 list_del(&psb->list);
572 psb->exch_busy = 0;
573 psb->status = IOSTAT_SUCCESS;
574 spin_unlock(
575 &phba->sli4_hba.abts_scsi_buf_list_lock);
576 if (psb->rdata && psb->rdata->pnode)
577 ndlp = psb->rdata->pnode;
578 else
579 ndlp = NULL;
580
581 rrq_empty = list_empty(&phba->active_rrq_list);
582 spin_unlock_irqrestore(&phba->hbalock, iflag);
583 if (ndlp) {
584 lpfc_set_rrq_active(phba, ndlp,
585 psb->cur_iocbq.sli4_lxritag, rxid, 1);
586 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
587 }
588 lpfc_release_scsi_buf_s4(phba, psb);
589 if (rrq_empty)
590 lpfc_worker_wake_up(phba);
591 return;
592 }
593 }
594 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
595 for (i = 1; i <= phba->sli.last_iotag; i++) {
596 iocbq = phba->sli.iocbq_lookup[i];
597
598 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
599 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
600 continue;
601 if (iocbq->sli4_xritag != xri)
602 continue;
603 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
604 psb->exch_busy = 0;
605 spin_unlock_irqrestore(&phba->hbalock, iflag);
606 if (!list_empty(&pring->txq))
607 lpfc_worker_wake_up(phba);
608 return;
609
610 }
611 spin_unlock_irqrestore(&phba->hbalock, iflag);
612 }
613
614 /**
615 * lpfc_sli4_post_scsi_sgl_list - Post blocks of scsi buffer sgls from a list
616 * @phba: pointer to lpfc hba data structure.
617 * @post_sblist: pointer to the scsi buffer list.
618 *
619 * This routine walks a list of scsi buffers that was passed in. It attempts
620 * to construct blocks of scsi buffer sgls which contains contiguous xris and
621 * uses the non-embedded SGL block post mailbox commands to post to the port.
622 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
623 * embedded SGL post mailbox command for posting. The @post_sblist passed in
624 * must be local list, thus no lock is needed when manipulate the list.
625 *
626 * Returns: 0 = failure, non-zero number of successfully posted buffers.
627 **/
628 static int
629 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
630 struct list_head *post_sblist, int sb_count)
631 {
632 struct lpfc_scsi_buf *psb, *psb_next;
633 int status, sgl_size;
634 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
635 dma_addr_t pdma_phys_bpl1;
636 int last_xritag = NO_XRI;
637 LIST_HEAD(prep_sblist);
638 LIST_HEAD(blck_sblist);
639 LIST_HEAD(scsi_sblist);
640
641 /* sanity check */
642 if (sb_count <= 0)
643 return -EINVAL;
644
645 sgl_size = phba->cfg_sg_dma_buf_size -
646 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
647
648 list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
649 list_del_init(&psb->list);
650 block_cnt++;
651 if ((last_xritag != NO_XRI) &&
652 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
653 /* a hole in xri block, form a sgl posting block */
654 list_splice_init(&prep_sblist, &blck_sblist);
655 post_cnt = block_cnt - 1;
656 /* prepare list for next posting block */
657 list_add_tail(&psb->list, &prep_sblist);
658 block_cnt = 1;
659 } else {
660 /* prepare list for next posting block */
661 list_add_tail(&psb->list, &prep_sblist);
662 /* enough sgls for non-embed sgl mbox command */
663 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
664 list_splice_init(&prep_sblist, &blck_sblist);
665 post_cnt = block_cnt;
666 block_cnt = 0;
667 }
668 }
669 num_posting++;
670 last_xritag = psb->cur_iocbq.sli4_xritag;
671
672 /* end of repost sgl list condition for SCSI buffers */
673 if (num_posting == sb_count) {
674 if (post_cnt == 0) {
675 /* last sgl posting block */
676 list_splice_init(&prep_sblist, &blck_sblist);
677 post_cnt = block_cnt;
678 } else if (block_cnt == 1) {
679 /* last single sgl with non-contiguous xri */
680 if (sgl_size > SGL_PAGE_SIZE)
681 pdma_phys_bpl1 = psb->dma_phys_bpl +
682 SGL_PAGE_SIZE;
683 else
684 pdma_phys_bpl1 = 0;
685 status = lpfc_sli4_post_sgl(phba,
686 psb->dma_phys_bpl,
687 pdma_phys_bpl1,
688 psb->cur_iocbq.sli4_xritag);
689 if (status) {
690 /* failure, put on abort scsi list */
691 psb->exch_busy = 1;
692 } else {
693 /* success, put on SCSI buffer list */
694 psb->exch_busy = 0;
695 psb->status = IOSTAT_SUCCESS;
696 num_posted++;
697 }
698 /* success, put on SCSI buffer sgl list */
699 list_add_tail(&psb->list, &scsi_sblist);
700 }
701 }
702
703 /* continue until a nembed page worth of sgls */
704 if (post_cnt == 0)
705 continue;
706
707 /* post block of SCSI buffer list sgls */
708 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
709 post_cnt);
710
711 /* don't reset xirtag due to hole in xri block */
712 if (block_cnt == 0)
713 last_xritag = NO_XRI;
714
715 /* reset SCSI buffer post count for next round of posting */
716 post_cnt = 0;
717
718 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
719 while (!list_empty(&blck_sblist)) {
720 list_remove_head(&blck_sblist, psb,
721 struct lpfc_scsi_buf, list);
722 if (status) {
723 /* failure, put on abort scsi list */
724 psb->exch_busy = 1;
725 } else {
726 /* success, put on SCSI buffer list */
727 psb->exch_busy = 0;
728 psb->status = IOSTAT_SUCCESS;
729 num_posted++;
730 }
731 list_add_tail(&psb->list, &scsi_sblist);
732 }
733 }
734 /* Push SCSI buffers with sgl posted to the availble list */
735 while (!list_empty(&scsi_sblist)) {
736 list_remove_head(&scsi_sblist, psb,
737 struct lpfc_scsi_buf, list);
738 lpfc_release_scsi_buf_s4(phba, psb);
739 }
740 return num_posted;
741 }
742
743 /**
744 * lpfc_sli4_repost_scsi_sgl_list - Repost all the allocated scsi buffer sgls
745 * @phba: pointer to lpfc hba data structure.
746 *
747 * This routine walks the list of scsi buffers that have been allocated and
748 * repost them to the port by using SGL block post. This is needed after a
749 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
750 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
751 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
752 *
753 * Returns: 0 = success, non-zero failure.
754 **/
755 int
756 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
757 {
758 LIST_HEAD(post_sblist);
759 int num_posted, rc = 0;
760
761 /* get all SCSI buffers need to repost to a local list */
762 spin_lock_irq(&phba->scsi_buf_list_get_lock);
763 spin_lock(&phba->scsi_buf_list_put_lock);
764 list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
765 list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
766 spin_unlock(&phba->scsi_buf_list_put_lock);
767 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
768
769 /* post the list of scsi buffer sgls to port if available */
770 if (!list_empty(&post_sblist)) {
771 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
772 phba->sli4_hba.scsi_xri_cnt);
773 /* failed to post any scsi buffer, return error */
774 if (num_posted == 0)
775 rc = -EIO;
776 }
777 return rc;
778 }
779
780 /**
781 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
782 * @vport: The virtual port for which this call being executed.
783 * @num_to_allocate: The requested number of buffers to allocate.
784 *
785 * This routine allocates scsi buffers for device with SLI-4 interface spec,
786 * the scsi buffer contains all the necessary information needed to initiate
787 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
788 * them on a list, it post them to the port by using SGL block post.
789 *
790 * Return codes:
791 * int - number of scsi buffers that were allocated and posted.
792 * 0 = failure, less than num_to_alloc is a partial failure.
793 **/
794 static int
795 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
796 {
797 struct lpfc_hba *phba = vport->phba;
798 struct lpfc_scsi_buf *psb;
799 struct sli4_sge *sgl;
800 IOCB_t *iocb;
801 dma_addr_t pdma_phys_fcp_cmd;
802 dma_addr_t pdma_phys_fcp_rsp;
803 dma_addr_t pdma_phys_bpl;
804 uint16_t iotag, lxri = 0;
805 int bcnt, num_posted, sgl_size;
806 LIST_HEAD(prep_sblist);
807 LIST_HEAD(post_sblist);
808 LIST_HEAD(scsi_sblist);
809
810 sgl_size = phba->cfg_sg_dma_buf_size -
811 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
812
813 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
814 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
815 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
816 (int)sizeof(struct fcp_cmnd),
817 (int)sizeof(struct fcp_rsp));
818
819 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
820 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
821 if (!psb)
822 break;
823 /*
824 * Get memory from the pci pool to map the virt space to
825 * pci bus space for an I/O. The DMA buffer includes space
826 * for the struct fcp_cmnd, struct fcp_rsp and the number
827 * of bde's necessary to support the sg_tablesize.
828 */
829 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
830 GFP_KERNEL, &psb->dma_handle);
831 if (!psb->data) {
832 kfree(psb);
833 break;
834 }
835
836 /*
837 * 4K Page alignment is CRITICAL to BlockGuard, double check
838 * to be sure.
839 */
840 if (phba->cfg_enable_bg && (((unsigned long)(psb->data) &
841 (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
842 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
843 psb->data, psb->dma_handle);
844 kfree(psb);
845 break;
846 }
847
848
849 lxri = lpfc_sli4_next_xritag(phba);
850 if (lxri == NO_XRI) {
851 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
852 psb->data, psb->dma_handle);
853 kfree(psb);
854 break;
855 }
856
857 /* Allocate iotag for psb->cur_iocbq. */
858 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
859 if (iotag == 0) {
860 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
861 psb->data, psb->dma_handle);
862 kfree(psb);
863 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
864 "3368 Failed to allocate IOTAG for"
865 " XRI:0x%x\n", lxri);
866 lpfc_sli4_free_xri(phba, lxri);
867 break;
868 }
869 psb->cur_iocbq.sli4_lxritag = lxri;
870 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
871 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
872 psb->fcp_bpl = psb->data;
873 psb->fcp_cmnd = (psb->data + sgl_size);
874 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
875 sizeof(struct fcp_cmnd));
876
877 /* Initialize local short-hand pointers. */
878 sgl = (struct sli4_sge *)psb->fcp_bpl;
879 pdma_phys_bpl = psb->dma_handle;
880 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
881 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
882
883 /*
884 * The first two bdes are the FCP_CMD and FCP_RSP.
885 * The balance are sg list bdes. Initialize the
886 * first two and leave the rest for queuecommand.
887 */
888 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
889 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
890 sgl->word2 = le32_to_cpu(sgl->word2);
891 bf_set(lpfc_sli4_sge_last, sgl, 0);
892 sgl->word2 = cpu_to_le32(sgl->word2);
893 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
894 sgl++;
895
896 /* Setup the physical region for the FCP RSP */
897 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
898 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
899 sgl->word2 = le32_to_cpu(sgl->word2);
900 bf_set(lpfc_sli4_sge_last, sgl, 1);
901 sgl->word2 = cpu_to_le32(sgl->word2);
902 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
903
904 /*
905 * Since the IOCB for the FCP I/O is built into this
906 * lpfc_scsi_buf, initialize it with all known data now.
907 */
908 iocb = &psb->cur_iocbq.iocb;
909 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
910 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
911 /* setting the BLP size to 2 * sizeof BDE may not be correct.
912 * We are setting the bpl to point to out sgl. An sgl's
913 * entries are 16 bytes, a bpl entries are 12 bytes.
914 */
915 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
916 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
917 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
918 iocb->ulpBdeCount = 1;
919 iocb->ulpLe = 1;
920 iocb->ulpClass = CLASS3;
921 psb->cur_iocbq.context1 = psb;
922 psb->dma_phys_bpl = pdma_phys_bpl;
923
924 /* add the scsi buffer to a post list */
925 list_add_tail(&psb->list, &post_sblist);
926 spin_lock_irq(&phba->scsi_buf_list_get_lock);
927 phba->sli4_hba.scsi_xri_cnt++;
928 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
929 }
930 lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP,
931 "3021 Allocate %d out of %d requested new SCSI "
932 "buffers\n", bcnt, num_to_alloc);
933
934 /* post the list of scsi buffer sgls to port if available */
935 if (!list_empty(&post_sblist))
936 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
937 &post_sblist, bcnt);
938 else
939 num_posted = 0;
940
941 return num_posted;
942 }
943
944 /**
945 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
946 * @vport: The virtual port for which this call being executed.
947 * @num_to_allocate: The requested number of buffers to allocate.
948 *
949 * This routine wraps the actual SCSI buffer allocator function pointer from
950 * the lpfc_hba struct.
951 *
952 * Return codes:
953 * int - number of scsi buffers that were allocated.
954 * 0 = failure, less than num_to_alloc is a partial failure.
955 **/
956 static inline int
957 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
958 {
959 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
960 }
961
962 /**
963 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
964 * @phba: The HBA for which this call is being executed.
965 *
966 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
967 * and returns to caller.
968 *
969 * Return codes:
970 * NULL - Error
971 * Pointer to lpfc_scsi_buf - Success
972 **/
973 static struct lpfc_scsi_buf*
974 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
975 {
976 struct lpfc_scsi_buf * lpfc_cmd = NULL;
977 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
978 unsigned long iflag = 0;
979
980 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
981 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
982 list);
983 if (!lpfc_cmd) {
984 spin_lock(&phba->scsi_buf_list_put_lock);
985 list_splice(&phba->lpfc_scsi_buf_list_put,
986 &phba->lpfc_scsi_buf_list_get);
987 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
988 list_remove_head(scsi_buf_list_get, lpfc_cmd,
989 struct lpfc_scsi_buf, list);
990 spin_unlock(&phba->scsi_buf_list_put_lock);
991 }
992 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
993 return lpfc_cmd;
994 }
995 /**
996 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
997 * @phba: The HBA for which this call is being executed.
998 *
999 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1000 * and returns to caller.
1001 *
1002 * Return codes:
1003 * NULL - Error
1004 * Pointer to lpfc_scsi_buf - Success
1005 **/
1006 static struct lpfc_scsi_buf*
1007 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1008 {
1009 struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1010 unsigned long iflag = 0;
1011 int found = 0;
1012
1013 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1014 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1015 &phba->lpfc_scsi_buf_list_get, list) {
1016 if (lpfc_test_rrq_active(phba, ndlp,
1017 lpfc_cmd->cur_iocbq.sli4_lxritag))
1018 continue;
1019 list_del(&lpfc_cmd->list);
1020 found = 1;
1021 break;
1022 }
1023 if (!found) {
1024 spin_lock(&phba->scsi_buf_list_put_lock);
1025 list_splice(&phba->lpfc_scsi_buf_list_put,
1026 &phba->lpfc_scsi_buf_list_get);
1027 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1028 spin_unlock(&phba->scsi_buf_list_put_lock);
1029 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1030 &phba->lpfc_scsi_buf_list_get, list) {
1031 if (lpfc_test_rrq_active(
1032 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1033 continue;
1034 list_del(&lpfc_cmd->list);
1035 found = 1;
1036 break;
1037 }
1038 }
1039 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1040 if (!found)
1041 return NULL;
1042 return lpfc_cmd;
1043 }
1044 /**
1045 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1046 * @phba: The HBA for which this call is being executed.
1047 *
1048 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1049 * and returns to caller.
1050 *
1051 * Return codes:
1052 * NULL - Error
1053 * Pointer to lpfc_scsi_buf - Success
1054 **/
1055 static struct lpfc_scsi_buf*
1056 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1057 {
1058 return phba->lpfc_get_scsi_buf(phba, ndlp);
1059 }
1060
1061 /**
1062 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1063 * @phba: The Hba for which this call is being executed.
1064 * @psb: The scsi buffer which is being released.
1065 *
1066 * This routine releases @psb scsi buffer by adding it to tail of @phba
1067 * lpfc_scsi_buf_list list.
1068 **/
1069 static void
1070 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1071 {
1072 unsigned long iflag = 0;
1073
1074 psb->seg_cnt = 0;
1075 psb->nonsg_phys = 0;
1076 psb->prot_seg_cnt = 0;
1077
1078 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1079 psb->pCmd = NULL;
1080 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1081 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1082 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1083 }
1084
1085 /**
1086 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1087 * @phba: The Hba for which this call is being executed.
1088 * @psb: The scsi buffer which is being released.
1089 *
1090 * This routine releases @psb scsi buffer by adding it to tail of @phba
1091 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1092 * and cannot be reused for at least RA_TOV amount of time if it was
1093 * aborted.
1094 **/
1095 static void
1096 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1097 {
1098 unsigned long iflag = 0;
1099
1100 psb->seg_cnt = 0;
1101 psb->nonsg_phys = 0;
1102 psb->prot_seg_cnt = 0;
1103
1104 if (psb->exch_busy) {
1105 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1106 iflag);
1107 psb->pCmd = NULL;
1108 list_add_tail(&psb->list,
1109 &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1110 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1111 iflag);
1112 } else {
1113 psb->pCmd = NULL;
1114 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1115 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1116 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1117 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1118 }
1119 }
1120
1121 /**
1122 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1123 * @phba: The Hba for which this call is being executed.
1124 * @psb: The scsi buffer which is being released.
1125 *
1126 * This routine releases @psb scsi buffer by adding it to tail of @phba
1127 * lpfc_scsi_buf_list list.
1128 **/
1129 static void
1130 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1131 {
1132
1133 phba->lpfc_release_scsi_buf(phba, psb);
1134 }
1135
1136 /**
1137 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1138 * @phba: The Hba for which this call is being executed.
1139 * @lpfc_cmd: The scsi buffer which is going to be mapped.
1140 *
1141 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1142 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1143 * through sg elements and format the bde. This routine also initializes all
1144 * IOCB fields which are dependent on scsi command request buffer.
1145 *
1146 * Return codes:
1147 * 1 - Error
1148 * 0 - Success
1149 **/
1150 static int
1151 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1152 {
1153 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1154 struct scatterlist *sgel = NULL;
1155 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1156 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1157 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1158 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1159 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1160 dma_addr_t physaddr;
1161 uint32_t num_bde = 0;
1162 int nseg, datadir = scsi_cmnd->sc_data_direction;
1163
1164 /*
1165 * There are three possibilities here - use scatter-gather segment, use
1166 * the single mapping, or neither. Start the lpfc command prep by
1167 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1168 * data bde entry.
1169 */
1170 bpl += 2;
1171 if (scsi_sg_count(scsi_cmnd)) {
1172 /*
1173 * The driver stores the segment count returned from pci_map_sg
1174 * because this a count of dma-mappings used to map the use_sg
1175 * pages. They are not guaranteed to be the same for those
1176 * architectures that implement an IOMMU.
1177 */
1178
1179 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1180 scsi_sg_count(scsi_cmnd), datadir);
1181 if (unlikely(!nseg))
1182 return 1;
1183
1184 lpfc_cmd->seg_cnt = nseg;
1185 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1186 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1187 "9064 BLKGRD: %s: Too many sg segments from "
1188 "dma_map_sg. Config %d, seg_cnt %d\n",
1189 __func__, phba->cfg_sg_seg_cnt,
1190 lpfc_cmd->seg_cnt);
1191 lpfc_cmd->seg_cnt = 0;
1192 scsi_dma_unmap(scsi_cmnd);
1193 return 1;
1194 }
1195
1196 /*
1197 * The driver established a maximum scatter-gather segment count
1198 * during probe that limits the number of sg elements in any
1199 * single scsi command. Just run through the seg_cnt and format
1200 * the bde's.
1201 * When using SLI-3 the driver will try to fit all the BDEs into
1202 * the IOCB. If it can't then the BDEs get added to a BPL as it
1203 * does for SLI-2 mode.
1204 */
1205 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1206 physaddr = sg_dma_address(sgel);
1207 if (phba->sli_rev == 3 &&
1208 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1209 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1210 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1211 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1212 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1213 data_bde->addrLow = putPaddrLow(physaddr);
1214 data_bde->addrHigh = putPaddrHigh(physaddr);
1215 data_bde++;
1216 } else {
1217 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1218 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1219 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1220 bpl->addrLow =
1221 le32_to_cpu(putPaddrLow(physaddr));
1222 bpl->addrHigh =
1223 le32_to_cpu(putPaddrHigh(physaddr));
1224 bpl++;
1225 }
1226 }
1227 }
1228
1229 /*
1230 * Finish initializing those IOCB fields that are dependent on the
1231 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
1232 * explicitly reinitialized and for SLI-3 the extended bde count is
1233 * explicitly reinitialized since all iocb memory resources are reused.
1234 */
1235 if (phba->sli_rev == 3 &&
1236 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1237 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1238 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1239 /*
1240 * The extended IOCB format can only fit 3 BDE or a BPL.
1241 * This I/O has more than 3 BDE so the 1st data bde will
1242 * be a BPL that is filled in here.
1243 */
1244 physaddr = lpfc_cmd->dma_handle;
1245 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1246 data_bde->tus.f.bdeSize = (num_bde *
1247 sizeof(struct ulp_bde64));
1248 physaddr += (sizeof(struct fcp_cmnd) +
1249 sizeof(struct fcp_rsp) +
1250 (2 * sizeof(struct ulp_bde64)));
1251 data_bde->addrHigh = putPaddrHigh(physaddr);
1252 data_bde->addrLow = putPaddrLow(physaddr);
1253 /* ebde count includes the response bde and data bpl */
1254 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1255 } else {
1256 /* ebde count includes the response bde and data bdes */
1257 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1258 }
1259 } else {
1260 iocb_cmd->un.fcpi64.bdl.bdeSize =
1261 ((num_bde + 2) * sizeof(struct ulp_bde64));
1262 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1263 }
1264 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1265
1266 /*
1267 * Due to difference in data length between DIF/non-DIF paths,
1268 * we need to set word 4 of IOCB here
1269 */
1270 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1271 return 0;
1272 }
1273
1274 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1275
1276 /* Return BG_ERR_INIT if error injection is detected by Initiator */
1277 #define BG_ERR_INIT 0x1
1278 /* Return BG_ERR_TGT if error injection is detected by Target */
1279 #define BG_ERR_TGT 0x2
1280 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1281 #define BG_ERR_SWAP 0x10
1282 /**
1283 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
1284 * error injection
1285 **/
1286 #define BG_ERR_CHECK 0x20
1287
1288 /**
1289 * lpfc_bg_err_inject - Determine if we should inject an error
1290 * @phba: The Hba for which this call is being executed.
1291 * @sc: The SCSI command to examine
1292 * @reftag: (out) BlockGuard reference tag for transmitted data
1293 * @apptag: (out) BlockGuard application tag for transmitted data
1294 * @new_guard (in) Value to replace CRC with if needed
1295 *
1296 * Returns BG_ERR_* bit mask or 0 if request ignored
1297 **/
1298 static int
1299 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1300 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1301 {
1302 struct scatterlist *sgpe; /* s/g prot entry */
1303 struct lpfc_scsi_buf *lpfc_cmd = NULL;
1304 struct scsi_dif_tuple *src = NULL;
1305 struct lpfc_nodelist *ndlp;
1306 struct lpfc_rport_data *rdata;
1307 uint32_t op = scsi_get_prot_op(sc);
1308 uint32_t blksize;
1309 uint32_t numblks;
1310 sector_t lba;
1311 int rc = 0;
1312 int blockoff = 0;
1313
1314 if (op == SCSI_PROT_NORMAL)
1315 return 0;
1316
1317 sgpe = scsi_prot_sglist(sc);
1318 lba = scsi_get_lba(sc);
1319
1320 /* First check if we need to match the LBA */
1321 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1322 blksize = lpfc_cmd_blksize(sc);
1323 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1324
1325 /* Make sure we have the right LBA if one is specified */
1326 if ((phba->lpfc_injerr_lba < lba) ||
1327 (phba->lpfc_injerr_lba >= (lba + numblks)))
1328 return 0;
1329 if (sgpe) {
1330 blockoff = phba->lpfc_injerr_lba - lba;
1331 numblks = sg_dma_len(sgpe) /
1332 sizeof(struct scsi_dif_tuple);
1333 if (numblks < blockoff)
1334 blockoff = numblks;
1335 }
1336 }
1337
1338 /* Next check if we need to match the remote NPortID or WWPN */
1339 rdata = lpfc_rport_data_from_scsi_device(sc->device);
1340 if (rdata && rdata->pnode) {
1341 ndlp = rdata->pnode;
1342
1343 /* Make sure we have the right NPortID if one is specified */
1344 if (phba->lpfc_injerr_nportid &&
1345 (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1346 return 0;
1347
1348 /*
1349 * Make sure we have the right WWPN if one is specified.
1350 * wwn[0] should be a non-zero NAA in a good WWPN.
1351 */
1352 if (phba->lpfc_injerr_wwpn.u.wwn[0] &&
1353 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1354 sizeof(struct lpfc_name)) != 0))
1355 return 0;
1356 }
1357
1358 /* Setup a ptr to the protection data if the SCSI host provides it */
1359 if (sgpe) {
1360 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1361 src += blockoff;
1362 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1363 }
1364
1365 /* Should we change the Reference Tag */
1366 if (reftag) {
1367 if (phba->lpfc_injerr_wref_cnt) {
1368 switch (op) {
1369 case SCSI_PROT_WRITE_PASS:
1370 if (src) {
1371 /*
1372 * For WRITE_PASS, force the error
1373 * to be sent on the wire. It should
1374 * be detected by the Target.
1375 * If blockoff != 0 error will be
1376 * inserted in middle of the IO.
1377 */
1378
1379 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1380 "9076 BLKGRD: Injecting reftag error: "
1381 "write lba x%lx + x%x oldrefTag x%x\n",
1382 (unsigned long)lba, blockoff,
1383 be32_to_cpu(src->ref_tag));
1384
1385 /*
1386 * Save the old ref_tag so we can
1387 * restore it on completion.
1388 */
1389 if (lpfc_cmd) {
1390 lpfc_cmd->prot_data_type =
1391 LPFC_INJERR_REFTAG;
1392 lpfc_cmd->prot_data_segment =
1393 src;
1394 lpfc_cmd->prot_data =
1395 src->ref_tag;
1396 }
1397 src->ref_tag = cpu_to_be32(0xDEADBEEF);
1398 phba->lpfc_injerr_wref_cnt--;
1399 if (phba->lpfc_injerr_wref_cnt == 0) {
1400 phba->lpfc_injerr_nportid = 0;
1401 phba->lpfc_injerr_lba =
1402 LPFC_INJERR_LBA_OFF;
1403 memset(&phba->lpfc_injerr_wwpn,
1404 0, sizeof(struct lpfc_name));
1405 }
1406 rc = BG_ERR_TGT | BG_ERR_CHECK;
1407
1408 break;
1409 }
1410 /* Drop thru */
1411 case SCSI_PROT_WRITE_INSERT:
1412 /*
1413 * For WRITE_INSERT, force the error
1414 * to be sent on the wire. It should be
1415 * detected by the Target.
1416 */
1417 /* DEADBEEF will be the reftag on the wire */
1418 *reftag = 0xDEADBEEF;
1419 phba->lpfc_injerr_wref_cnt--;
1420 if (phba->lpfc_injerr_wref_cnt == 0) {
1421 phba->lpfc_injerr_nportid = 0;
1422 phba->lpfc_injerr_lba =
1423 LPFC_INJERR_LBA_OFF;
1424 memset(&phba->lpfc_injerr_wwpn,
1425 0, sizeof(struct lpfc_name));
1426 }
1427 rc = BG_ERR_TGT | BG_ERR_CHECK;
1428
1429 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1430 "9078 BLKGRD: Injecting reftag error: "
1431 "write lba x%lx\n", (unsigned long)lba);
1432 break;
1433 case SCSI_PROT_WRITE_STRIP:
1434 /*
1435 * For WRITE_STRIP and WRITE_PASS,
1436 * force the error on data
1437 * being copied from SLI-Host to SLI-Port.
1438 */
1439 *reftag = 0xDEADBEEF;
1440 phba->lpfc_injerr_wref_cnt--;
1441 if (phba->lpfc_injerr_wref_cnt == 0) {
1442 phba->lpfc_injerr_nportid = 0;
1443 phba->lpfc_injerr_lba =
1444 LPFC_INJERR_LBA_OFF;
1445 memset(&phba->lpfc_injerr_wwpn,
1446 0, sizeof(struct lpfc_name));
1447 }
1448 rc = BG_ERR_INIT;
1449
1450 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1451 "9077 BLKGRD: Injecting reftag error: "
1452 "write lba x%lx\n", (unsigned long)lba);
1453 break;
1454 }
1455 }
1456 if (phba->lpfc_injerr_rref_cnt) {
1457 switch (op) {
1458 case SCSI_PROT_READ_INSERT:
1459 case SCSI_PROT_READ_STRIP:
1460 case SCSI_PROT_READ_PASS:
1461 /*
1462 * For READ_STRIP and READ_PASS, force the
1463 * error on data being read off the wire. It
1464 * should force an IO error to the driver.
1465 */
1466 *reftag = 0xDEADBEEF;
1467 phba->lpfc_injerr_rref_cnt--;
1468 if (phba->lpfc_injerr_rref_cnt == 0) {
1469 phba->lpfc_injerr_nportid = 0;
1470 phba->lpfc_injerr_lba =
1471 LPFC_INJERR_LBA_OFF;
1472 memset(&phba->lpfc_injerr_wwpn,
1473 0, sizeof(struct lpfc_name));
1474 }
1475 rc = BG_ERR_INIT;
1476
1477 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1478 "9079 BLKGRD: Injecting reftag error: "
1479 "read lba x%lx\n", (unsigned long)lba);
1480 break;
1481 }
1482 }
1483 }
1484
1485 /* Should we change the Application Tag */
1486 if (apptag) {
1487 if (phba->lpfc_injerr_wapp_cnt) {
1488 switch (op) {
1489 case SCSI_PROT_WRITE_PASS:
1490 if (src) {
1491 /*
1492 * For WRITE_PASS, force the error
1493 * to be sent on the wire. It should
1494 * be detected by the Target.
1495 * If blockoff != 0 error will be
1496 * inserted in middle of the IO.
1497 */
1498
1499 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1500 "9080 BLKGRD: Injecting apptag error: "
1501 "write lba x%lx + x%x oldappTag x%x\n",
1502 (unsigned long)lba, blockoff,
1503 be16_to_cpu(src->app_tag));
1504
1505 /*
1506 * Save the old app_tag so we can
1507 * restore it on completion.
1508 */
1509 if (lpfc_cmd) {
1510 lpfc_cmd->prot_data_type =
1511 LPFC_INJERR_APPTAG;
1512 lpfc_cmd->prot_data_segment =
1513 src;
1514 lpfc_cmd->prot_data =
1515 src->app_tag;
1516 }
1517 src->app_tag = cpu_to_be16(0xDEAD);
1518 phba->lpfc_injerr_wapp_cnt--;
1519 if (phba->lpfc_injerr_wapp_cnt == 0) {
1520 phba->lpfc_injerr_nportid = 0;
1521 phba->lpfc_injerr_lba =
1522 LPFC_INJERR_LBA_OFF;
1523 memset(&phba->lpfc_injerr_wwpn,
1524 0, sizeof(struct lpfc_name));
1525 }
1526 rc = BG_ERR_TGT | BG_ERR_CHECK;
1527 break;
1528 }
1529 /* Drop thru */
1530 case SCSI_PROT_WRITE_INSERT:
1531 /*
1532 * For WRITE_INSERT, force the
1533 * error to be sent on the wire. It should be
1534 * detected by the Target.
1535 */
1536 /* DEAD will be the apptag on the wire */
1537 *apptag = 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
1548 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1549 "0813 BLKGRD: Injecting apptag error: "
1550 "write lba x%lx\n", (unsigned long)lba);
1551 break;
1552 case SCSI_PROT_WRITE_STRIP:
1553 /*
1554 * For WRITE_STRIP and WRITE_PASS,
1555 * force the error on data
1556 * being copied from SLI-Host to SLI-Port.
1557 */
1558 *apptag = 0xDEAD;
1559 phba->lpfc_injerr_wapp_cnt--;
1560 if (phba->lpfc_injerr_wapp_cnt == 0) {
1561 phba->lpfc_injerr_nportid = 0;
1562 phba->lpfc_injerr_lba =
1563 LPFC_INJERR_LBA_OFF;
1564 memset(&phba->lpfc_injerr_wwpn,
1565 0, sizeof(struct lpfc_name));
1566 }
1567 rc = BG_ERR_INIT;
1568
1569 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1570 "0812 BLKGRD: Injecting apptag error: "
1571 "write lba x%lx\n", (unsigned long)lba);
1572 break;
1573 }
1574 }
1575 if (phba->lpfc_injerr_rapp_cnt) {
1576 switch (op) {
1577 case SCSI_PROT_READ_INSERT:
1578 case SCSI_PROT_READ_STRIP:
1579 case SCSI_PROT_READ_PASS:
1580 /*
1581 * For READ_STRIP and READ_PASS, force the
1582 * error on data being read off the wire. It
1583 * should force an IO error to the driver.
1584 */
1585 *apptag = 0xDEAD;
1586 phba->lpfc_injerr_rapp_cnt--;
1587 if (phba->lpfc_injerr_rapp_cnt == 0) {
1588 phba->lpfc_injerr_nportid = 0;
1589 phba->lpfc_injerr_lba =
1590 LPFC_INJERR_LBA_OFF;
1591 memset(&phba->lpfc_injerr_wwpn,
1592 0, sizeof(struct lpfc_name));
1593 }
1594 rc = BG_ERR_INIT;
1595
1596 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1597 "0814 BLKGRD: Injecting apptag error: "
1598 "read lba x%lx\n", (unsigned long)lba);
1599 break;
1600 }
1601 }
1602 }
1603
1604
1605 /* Should we change the Guard Tag */
1606 if (new_guard) {
1607 if (phba->lpfc_injerr_wgrd_cnt) {
1608 switch (op) {
1609 case SCSI_PROT_WRITE_PASS:
1610 rc = BG_ERR_CHECK;
1611 /* Drop thru */
1612
1613 case SCSI_PROT_WRITE_INSERT:
1614 /*
1615 * For WRITE_INSERT, force the
1616 * error to be sent on the wire. It should be
1617 * detected by the Target.
1618 */
1619 phba->lpfc_injerr_wgrd_cnt--;
1620 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1621 phba->lpfc_injerr_nportid = 0;
1622 phba->lpfc_injerr_lba =
1623 LPFC_INJERR_LBA_OFF;
1624 memset(&phba->lpfc_injerr_wwpn,
1625 0, sizeof(struct lpfc_name));
1626 }
1627
1628 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1629 /* Signals the caller to swap CRC->CSUM */
1630
1631 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1632 "0817 BLKGRD: Injecting guard error: "
1633 "write lba x%lx\n", (unsigned long)lba);
1634 break;
1635 case SCSI_PROT_WRITE_STRIP:
1636 /*
1637 * For WRITE_STRIP and WRITE_PASS,
1638 * force the error on data
1639 * being copied from SLI-Host to SLI-Port.
1640 */
1641 phba->lpfc_injerr_wgrd_cnt--;
1642 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1643 phba->lpfc_injerr_nportid = 0;
1644 phba->lpfc_injerr_lba =
1645 LPFC_INJERR_LBA_OFF;
1646 memset(&phba->lpfc_injerr_wwpn,
1647 0, sizeof(struct lpfc_name));
1648 }
1649
1650 rc = BG_ERR_INIT | BG_ERR_SWAP;
1651 /* Signals the caller to swap CRC->CSUM */
1652
1653 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1654 "0816 BLKGRD: Injecting guard error: "
1655 "write lba x%lx\n", (unsigned long)lba);
1656 break;
1657 }
1658 }
1659 if (phba->lpfc_injerr_rgrd_cnt) {
1660 switch (op) {
1661 case SCSI_PROT_READ_INSERT:
1662 case SCSI_PROT_READ_STRIP:
1663 case SCSI_PROT_READ_PASS:
1664 /*
1665 * For READ_STRIP and READ_PASS, force the
1666 * error on data being read off the wire. It
1667 * should force an IO error to the driver.
1668 */
1669 phba->lpfc_injerr_rgrd_cnt--;
1670 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1671 phba->lpfc_injerr_nportid = 0;
1672 phba->lpfc_injerr_lba =
1673 LPFC_INJERR_LBA_OFF;
1674 memset(&phba->lpfc_injerr_wwpn,
1675 0, sizeof(struct lpfc_name));
1676 }
1677
1678 rc = BG_ERR_INIT | BG_ERR_SWAP;
1679 /* Signals the caller to swap CRC->CSUM */
1680
1681 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1682 "0818 BLKGRD: Injecting guard error: "
1683 "read lba x%lx\n", (unsigned long)lba);
1684 }
1685 }
1686 }
1687
1688 return rc;
1689 }
1690 #endif
1691
1692 /**
1693 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1694 * the specified SCSI command.
1695 * @phba: The Hba for which this call is being executed.
1696 * @sc: The SCSI command to examine
1697 * @txopt: (out) BlockGuard operation for transmitted data
1698 * @rxopt: (out) BlockGuard operation for received data
1699 *
1700 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1701 *
1702 **/
1703 static int
1704 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1705 uint8_t *txop, uint8_t *rxop)
1706 {
1707 uint8_t ret = 0;
1708
1709 if (lpfc_cmd_guard_csum(sc)) {
1710 switch (scsi_get_prot_op(sc)) {
1711 case SCSI_PROT_READ_INSERT:
1712 case SCSI_PROT_WRITE_STRIP:
1713 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1714 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1715 break;
1716
1717 case SCSI_PROT_READ_STRIP:
1718 case SCSI_PROT_WRITE_INSERT:
1719 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1720 *txop = BG_OP_IN_NODIF_OUT_CRC;
1721 break;
1722
1723 case SCSI_PROT_READ_PASS:
1724 case SCSI_PROT_WRITE_PASS:
1725 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1726 *txop = BG_OP_IN_CSUM_OUT_CRC;
1727 break;
1728
1729 case SCSI_PROT_NORMAL:
1730 default:
1731 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1732 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1733 scsi_get_prot_op(sc));
1734 ret = 1;
1735 break;
1736
1737 }
1738 } else {
1739 switch (scsi_get_prot_op(sc)) {
1740 case SCSI_PROT_READ_STRIP:
1741 case SCSI_PROT_WRITE_INSERT:
1742 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1743 *txop = BG_OP_IN_NODIF_OUT_CRC;
1744 break;
1745
1746 case SCSI_PROT_READ_PASS:
1747 case SCSI_PROT_WRITE_PASS:
1748 *rxop = BG_OP_IN_CRC_OUT_CRC;
1749 *txop = BG_OP_IN_CRC_OUT_CRC;
1750 break;
1751
1752 case SCSI_PROT_READ_INSERT:
1753 case SCSI_PROT_WRITE_STRIP:
1754 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1755 *txop = BG_OP_IN_CRC_OUT_NODIF;
1756 break;
1757
1758 case SCSI_PROT_NORMAL:
1759 default:
1760 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1761 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1762 scsi_get_prot_op(sc));
1763 ret = 1;
1764 break;
1765 }
1766 }
1767
1768 return ret;
1769 }
1770
1771 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1772 /**
1773 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1774 * the specified SCSI command in order to force a guard tag error.
1775 * @phba: The Hba for which this call is being executed.
1776 * @sc: The SCSI command to examine
1777 * @txopt: (out) BlockGuard operation for transmitted data
1778 * @rxopt: (out) BlockGuard operation for received data
1779 *
1780 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1781 *
1782 **/
1783 static int
1784 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1785 uint8_t *txop, uint8_t *rxop)
1786 {
1787 uint8_t ret = 0;
1788
1789 if (lpfc_cmd_guard_csum(sc)) {
1790 switch (scsi_get_prot_op(sc)) {
1791 case SCSI_PROT_READ_INSERT:
1792 case SCSI_PROT_WRITE_STRIP:
1793 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1794 *txop = BG_OP_IN_CRC_OUT_NODIF;
1795 break;
1796
1797 case SCSI_PROT_READ_STRIP:
1798 case SCSI_PROT_WRITE_INSERT:
1799 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1800 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1801 break;
1802
1803 case SCSI_PROT_READ_PASS:
1804 case SCSI_PROT_WRITE_PASS:
1805 *rxop = BG_OP_IN_CSUM_OUT_CRC;
1806 *txop = BG_OP_IN_CRC_OUT_CSUM;
1807 break;
1808
1809 case SCSI_PROT_NORMAL:
1810 default:
1811 break;
1812
1813 }
1814 } else {
1815 switch (scsi_get_prot_op(sc)) {
1816 case SCSI_PROT_READ_STRIP:
1817 case SCSI_PROT_WRITE_INSERT:
1818 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1819 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1820 break;
1821
1822 case SCSI_PROT_READ_PASS:
1823 case SCSI_PROT_WRITE_PASS:
1824 *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1825 *txop = BG_OP_IN_CSUM_OUT_CSUM;
1826 break;
1827
1828 case SCSI_PROT_READ_INSERT:
1829 case SCSI_PROT_WRITE_STRIP:
1830 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1831 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1832 break;
1833
1834 case SCSI_PROT_NORMAL:
1835 default:
1836 break;
1837 }
1838 }
1839
1840 return ret;
1841 }
1842 #endif
1843
1844 /**
1845 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1846 * @phba: The Hba for which this call is being executed.
1847 * @sc: pointer to scsi command we're working on
1848 * @bpl: pointer to buffer list for protection groups
1849 * @datacnt: number of segments of data that have been dma mapped
1850 *
1851 * This function sets up BPL buffer list for protection groups of
1852 * type LPFC_PG_TYPE_NO_DIF
1853 *
1854 * This is usually used when the HBA is instructed to generate
1855 * DIFs and insert them into data stream (or strip DIF from
1856 * incoming data stream)
1857 *
1858 * The buffer list consists of just one protection group described
1859 * below:
1860 * +-------------------------+
1861 * start of prot group --> | PDE_5 |
1862 * +-------------------------+
1863 * | PDE_6 |
1864 * +-------------------------+
1865 * | Data BDE |
1866 * +-------------------------+
1867 * |more Data BDE's ... (opt)|
1868 * +-------------------------+
1869 *
1870 *
1871 * Note: Data s/g buffers have been dma mapped
1872 *
1873 * Returns the number of BDEs added to the BPL.
1874 **/
1875 static int
1876 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1877 struct ulp_bde64 *bpl, int datasegcnt)
1878 {
1879 struct scatterlist *sgde = NULL; /* s/g data entry */
1880 struct lpfc_pde5 *pde5 = NULL;
1881 struct lpfc_pde6 *pde6 = NULL;
1882 dma_addr_t physaddr;
1883 int i = 0, num_bde = 0, status;
1884 int datadir = sc->sc_data_direction;
1885 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1886 uint32_t rc;
1887 #endif
1888 uint32_t checking = 1;
1889 uint32_t reftag;
1890 uint8_t txop, rxop;
1891
1892 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1893 if (status)
1894 goto out;
1895
1896 /* extract some info from the scsi command for pde*/
1897 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1898
1899 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1900 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1901 if (rc) {
1902 if (rc & BG_ERR_SWAP)
1903 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1904 if (rc & BG_ERR_CHECK)
1905 checking = 0;
1906 }
1907 #endif
1908
1909 /* setup PDE5 with what we have */
1910 pde5 = (struct lpfc_pde5 *) bpl;
1911 memset(pde5, 0, sizeof(struct lpfc_pde5));
1912 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1913
1914 /* Endianness conversion if necessary for PDE5 */
1915 pde5->word0 = cpu_to_le32(pde5->word0);
1916 pde5->reftag = cpu_to_le32(reftag);
1917
1918 /* advance bpl and increment bde count */
1919 num_bde++;
1920 bpl++;
1921 pde6 = (struct lpfc_pde6 *) bpl;
1922
1923 /* setup PDE6 with the rest of the info */
1924 memset(pde6, 0, sizeof(struct lpfc_pde6));
1925 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1926 bf_set(pde6_optx, pde6, txop);
1927 bf_set(pde6_oprx, pde6, rxop);
1928
1929 /*
1930 * We only need to check the data on READs, for WRITEs
1931 * protection data is automatically generated, not checked.
1932 */
1933 if (datadir == DMA_FROM_DEVICE) {
1934 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1935 bf_set(pde6_ce, pde6, checking);
1936 else
1937 bf_set(pde6_ce, pde6, 0);
1938
1939 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1940 bf_set(pde6_re, pde6, checking);
1941 else
1942 bf_set(pde6_re, pde6, 0);
1943 }
1944 bf_set(pde6_ai, pde6, 1);
1945 bf_set(pde6_ae, pde6, 0);
1946 bf_set(pde6_apptagval, pde6, 0);
1947
1948 /* Endianness conversion if necessary for PDE6 */
1949 pde6->word0 = cpu_to_le32(pde6->word0);
1950 pde6->word1 = cpu_to_le32(pde6->word1);
1951 pde6->word2 = cpu_to_le32(pde6->word2);
1952
1953 /* advance bpl and increment bde count */
1954 num_bde++;
1955 bpl++;
1956
1957 /* assumption: caller has already run dma_map_sg on command data */
1958 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1959 physaddr = sg_dma_address(sgde);
1960 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1961 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1962 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1963 if (datadir == DMA_TO_DEVICE)
1964 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1965 else
1966 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1967 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1968 bpl++;
1969 num_bde++;
1970 }
1971
1972 out:
1973 return num_bde;
1974 }
1975
1976 /**
1977 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1978 * @phba: The Hba for which this call is being executed.
1979 * @sc: pointer to scsi command we're working on
1980 * @bpl: pointer to buffer list for protection groups
1981 * @datacnt: number of segments of data that have been dma mapped
1982 * @protcnt: number of segment of protection data that have been dma mapped
1983 *
1984 * This function sets up BPL buffer list for protection groups of
1985 * type LPFC_PG_TYPE_DIF
1986 *
1987 * This is usually used when DIFs are in their own buffers,
1988 * separate from the data. The HBA can then by instructed
1989 * to place the DIFs in the outgoing stream. For read operations,
1990 * The HBA could extract the DIFs and place it in DIF buffers.
1991 *
1992 * The buffer list for this type consists of one or more of the
1993 * protection groups described below:
1994 * +-------------------------+
1995 * start of first prot group --> | PDE_5 |
1996 * +-------------------------+
1997 * | PDE_6 |
1998 * +-------------------------+
1999 * | PDE_7 (Prot BDE) |
2000 * +-------------------------+
2001 * | Data BDE |
2002 * +-------------------------+
2003 * |more Data BDE's ... (opt)|
2004 * +-------------------------+
2005 * start of new prot group --> | PDE_5 |
2006 * +-------------------------+
2007 * | ... |
2008 * +-------------------------+
2009 *
2010 * Note: It is assumed that both data and protection s/g buffers have been
2011 * mapped for DMA
2012 *
2013 * Returns the number of BDEs added to the BPL.
2014 **/
2015 static int
2016 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2017 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2018 {
2019 struct scatterlist *sgde = NULL; /* s/g data entry */
2020 struct scatterlist *sgpe = NULL; /* s/g prot entry */
2021 struct lpfc_pde5 *pde5 = NULL;
2022 struct lpfc_pde6 *pde6 = NULL;
2023 struct lpfc_pde7 *pde7 = NULL;
2024 dma_addr_t dataphysaddr, protphysaddr;
2025 unsigned short curr_data = 0, curr_prot = 0;
2026 unsigned int split_offset;
2027 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2028 unsigned int protgrp_blks, protgrp_bytes;
2029 unsigned int remainder, subtotal;
2030 int status;
2031 int datadir = sc->sc_data_direction;
2032 unsigned char pgdone = 0, alldone = 0;
2033 unsigned blksize;
2034 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2035 uint32_t rc;
2036 #endif
2037 uint32_t checking = 1;
2038 uint32_t reftag;
2039 uint8_t txop, rxop;
2040 int num_bde = 0;
2041
2042 sgpe = scsi_prot_sglist(sc);
2043 sgde = scsi_sglist(sc);
2044
2045 if (!sgpe || !sgde) {
2046 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2047 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2048 sgpe, sgde);
2049 return 0;
2050 }
2051
2052 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2053 if (status)
2054 goto out;
2055
2056 /* extract some info from the scsi command */
2057 blksize = lpfc_cmd_blksize(sc);
2058 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2059
2060 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2061 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2062 if (rc) {
2063 if (rc & BG_ERR_SWAP)
2064 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2065 if (rc & BG_ERR_CHECK)
2066 checking = 0;
2067 }
2068 #endif
2069
2070 split_offset = 0;
2071 do {
2072 /* Check to see if we ran out of space */
2073 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2074 return num_bde + 3;
2075
2076 /* setup PDE5 with what we have */
2077 pde5 = (struct lpfc_pde5 *) bpl;
2078 memset(pde5, 0, sizeof(struct lpfc_pde5));
2079 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2080
2081 /* Endianness conversion if necessary for PDE5 */
2082 pde5->word0 = cpu_to_le32(pde5->word0);
2083 pde5->reftag = cpu_to_le32(reftag);
2084
2085 /* advance bpl and increment bde count */
2086 num_bde++;
2087 bpl++;
2088 pde6 = (struct lpfc_pde6 *) bpl;
2089
2090 /* setup PDE6 with the rest of the info */
2091 memset(pde6, 0, sizeof(struct lpfc_pde6));
2092 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2093 bf_set(pde6_optx, pde6, txop);
2094 bf_set(pde6_oprx, pde6, rxop);
2095
2096 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2097 bf_set(pde6_ce, pde6, checking);
2098 else
2099 bf_set(pde6_ce, pde6, 0);
2100
2101 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2102 bf_set(pde6_re, pde6, checking);
2103 else
2104 bf_set(pde6_re, pde6, 0);
2105
2106 bf_set(pde6_ai, pde6, 1);
2107 bf_set(pde6_ae, pde6, 0);
2108 bf_set(pde6_apptagval, pde6, 0);
2109
2110 /* Endianness conversion if necessary for PDE6 */
2111 pde6->word0 = cpu_to_le32(pde6->word0);
2112 pde6->word1 = cpu_to_le32(pde6->word1);
2113 pde6->word2 = cpu_to_le32(pde6->word2);
2114
2115 /* advance bpl and increment bde count */
2116 num_bde++;
2117 bpl++;
2118
2119 /* setup the first BDE that points to protection buffer */
2120 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2121 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2122
2123 /* must be integer multiple of the DIF block length */
2124 BUG_ON(protgroup_len % 8);
2125
2126 pde7 = (struct lpfc_pde7 *) bpl;
2127 memset(pde7, 0, sizeof(struct lpfc_pde7));
2128 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2129
2130 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2131 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2132
2133 protgrp_blks = protgroup_len / 8;
2134 protgrp_bytes = protgrp_blks * blksize;
2135
2136 /* check if this pde is crossing the 4K boundary; if so split */
2137 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2138 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2139 protgroup_offset += protgroup_remainder;
2140 protgrp_blks = protgroup_remainder / 8;
2141 protgrp_bytes = protgrp_blks * blksize;
2142 } else {
2143 protgroup_offset = 0;
2144 curr_prot++;
2145 }
2146
2147 num_bde++;
2148
2149 /* setup BDE's for data blocks associated with DIF data */
2150 pgdone = 0;
2151 subtotal = 0; /* total bytes processed for current prot grp */
2152 while (!pgdone) {
2153 /* Check to see if we ran out of space */
2154 if (num_bde >= phba->cfg_total_seg_cnt)
2155 return num_bde + 1;
2156
2157 if (!sgde) {
2158 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2159 "9065 BLKGRD:%s Invalid data segment\n",
2160 __func__);
2161 return 0;
2162 }
2163 bpl++;
2164 dataphysaddr = sg_dma_address(sgde) + split_offset;
2165 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2166 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2167
2168 remainder = sg_dma_len(sgde) - split_offset;
2169
2170 if ((subtotal + remainder) <= protgrp_bytes) {
2171 /* we can use this whole buffer */
2172 bpl->tus.f.bdeSize = remainder;
2173 split_offset = 0;
2174
2175 if ((subtotal + remainder) == protgrp_bytes)
2176 pgdone = 1;
2177 } else {
2178 /* must split this buffer with next prot grp */
2179 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2180 split_offset += bpl->tus.f.bdeSize;
2181 }
2182
2183 subtotal += bpl->tus.f.bdeSize;
2184
2185 if (datadir == DMA_TO_DEVICE)
2186 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2187 else
2188 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2189 bpl->tus.w = le32_to_cpu(bpl->tus.w);
2190
2191 num_bde++;
2192 curr_data++;
2193
2194 if (split_offset)
2195 break;
2196
2197 /* Move to the next s/g segment if possible */
2198 sgde = sg_next(sgde);
2199
2200 }
2201
2202 if (protgroup_offset) {
2203 /* update the reference tag */
2204 reftag += protgrp_blks;
2205 bpl++;
2206 continue;
2207 }
2208
2209 /* are we done ? */
2210 if (curr_prot == protcnt) {
2211 alldone = 1;
2212 } else if (curr_prot < protcnt) {
2213 /* advance to next prot buffer */
2214 sgpe = sg_next(sgpe);
2215 bpl++;
2216
2217 /* update the reference tag */
2218 reftag += protgrp_blks;
2219 } else {
2220 /* if we're here, we have a bug */
2221 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2222 "9054 BLKGRD: bug in %s\n", __func__);
2223 }
2224
2225 } while (!alldone);
2226 out:
2227
2228 return num_bde;
2229 }
2230
2231 /**
2232 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2233 * @phba: The Hba for which this call is being executed.
2234 * @sc: pointer to scsi command we're working on
2235 * @sgl: pointer to buffer list for protection groups
2236 * @datacnt: number of segments of data that have been dma mapped
2237 *
2238 * This function sets up SGL buffer list for protection groups of
2239 * type LPFC_PG_TYPE_NO_DIF
2240 *
2241 * This is usually used when the HBA is instructed to generate
2242 * DIFs and insert them into data stream (or strip DIF from
2243 * incoming data stream)
2244 *
2245 * The buffer list consists of just one protection group described
2246 * below:
2247 * +-------------------------+
2248 * start of prot group --> | DI_SEED |
2249 * +-------------------------+
2250 * | Data SGE |
2251 * +-------------------------+
2252 * |more Data SGE's ... (opt)|
2253 * +-------------------------+
2254 *
2255 *
2256 * Note: Data s/g buffers have been dma mapped
2257 *
2258 * Returns the number of SGEs added to the SGL.
2259 **/
2260 static int
2261 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2262 struct sli4_sge *sgl, int datasegcnt)
2263 {
2264 struct scatterlist *sgde = NULL; /* s/g data entry */
2265 struct sli4_sge_diseed *diseed = NULL;
2266 dma_addr_t physaddr;
2267 int i = 0, num_sge = 0, status;
2268 uint32_t reftag;
2269 uint8_t txop, rxop;
2270 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2271 uint32_t rc;
2272 #endif
2273 uint32_t checking = 1;
2274 uint32_t dma_len;
2275 uint32_t dma_offset = 0;
2276
2277 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2278 if (status)
2279 goto out;
2280
2281 /* extract some info from the scsi command for pde*/
2282 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2283
2284 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2285 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2286 if (rc) {
2287 if (rc & BG_ERR_SWAP)
2288 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2289 if (rc & BG_ERR_CHECK)
2290 checking = 0;
2291 }
2292 #endif
2293
2294 /* setup DISEED with what we have */
2295 diseed = (struct sli4_sge_diseed *) sgl;
2296 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2297 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2298
2299 /* Endianness conversion if necessary */
2300 diseed->ref_tag = cpu_to_le32(reftag);
2301 diseed->ref_tag_tran = diseed->ref_tag;
2302
2303 /*
2304 * We only need to check the data on READs, for WRITEs
2305 * protection data is automatically generated, not checked.
2306 */
2307 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2308 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2309 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2310 else
2311 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2312
2313 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2314 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2315 else
2316 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2317 }
2318
2319 /* setup DISEED with the rest of the info */
2320 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2321 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2322
2323 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2324 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2325
2326 /* Endianness conversion if necessary for DISEED */
2327 diseed->word2 = cpu_to_le32(diseed->word2);
2328 diseed->word3 = cpu_to_le32(diseed->word3);
2329
2330 /* advance bpl and increment sge count */
2331 num_sge++;
2332 sgl++;
2333
2334 /* assumption: caller has already run dma_map_sg on command data */
2335 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2336 physaddr = sg_dma_address(sgde);
2337 dma_len = sg_dma_len(sgde);
2338 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2339 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2340 if ((i + 1) == datasegcnt)
2341 bf_set(lpfc_sli4_sge_last, sgl, 1);
2342 else
2343 bf_set(lpfc_sli4_sge_last, sgl, 0);
2344 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2345 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2346
2347 sgl->sge_len = cpu_to_le32(dma_len);
2348 dma_offset += dma_len;
2349
2350 sgl++;
2351 num_sge++;
2352 }
2353
2354 out:
2355 return num_sge;
2356 }
2357
2358 /**
2359 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2360 * @phba: The Hba for which this call is being executed.
2361 * @sc: pointer to scsi command we're working on
2362 * @sgl: pointer to buffer list for protection groups
2363 * @datacnt: number of segments of data that have been dma mapped
2364 * @protcnt: number of segment of protection data that have been dma mapped
2365 *
2366 * This function sets up SGL buffer list for protection groups of
2367 * type LPFC_PG_TYPE_DIF
2368 *
2369 * This is usually used when DIFs are in their own buffers,
2370 * separate from the data. The HBA can then by instructed
2371 * to place the DIFs in the outgoing stream. For read operations,
2372 * The HBA could extract the DIFs and place it in DIF buffers.
2373 *
2374 * The buffer list for this type consists of one or more of the
2375 * protection groups described below:
2376 * +-------------------------+
2377 * start of first prot group --> | DISEED |
2378 * +-------------------------+
2379 * | DIF (Prot SGE) |
2380 * +-------------------------+
2381 * | Data SGE |
2382 * +-------------------------+
2383 * |more Data SGE's ... (opt)|
2384 * +-------------------------+
2385 * start of new prot group --> | DISEED |
2386 * +-------------------------+
2387 * | ... |
2388 * +-------------------------+
2389 *
2390 * Note: It is assumed that both data and protection s/g buffers have been
2391 * mapped for DMA
2392 *
2393 * Returns the number of SGEs added to the SGL.
2394 **/
2395 static int
2396 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2397 struct sli4_sge *sgl, int datacnt, int protcnt)
2398 {
2399 struct scatterlist *sgde = NULL; /* s/g data entry */
2400 struct scatterlist *sgpe = NULL; /* s/g prot entry */
2401 struct sli4_sge_diseed *diseed = NULL;
2402 dma_addr_t dataphysaddr, protphysaddr;
2403 unsigned short curr_data = 0, curr_prot = 0;
2404 unsigned int split_offset;
2405 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2406 unsigned int protgrp_blks, protgrp_bytes;
2407 unsigned int remainder, subtotal;
2408 int status;
2409 unsigned char pgdone = 0, alldone = 0;
2410 unsigned blksize;
2411 uint32_t reftag;
2412 uint8_t txop, rxop;
2413 uint32_t dma_len;
2414 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2415 uint32_t rc;
2416 #endif
2417 uint32_t checking = 1;
2418 uint32_t dma_offset = 0;
2419 int num_sge = 0;
2420
2421 sgpe = scsi_prot_sglist(sc);
2422 sgde = scsi_sglist(sc);
2423
2424 if (!sgpe || !sgde) {
2425 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2426 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2427 sgpe, sgde);
2428 return 0;
2429 }
2430
2431 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2432 if (status)
2433 goto out;
2434
2435 /* extract some info from the scsi command */
2436 blksize = lpfc_cmd_blksize(sc);
2437 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2438
2439 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2440 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2441 if (rc) {
2442 if (rc & BG_ERR_SWAP)
2443 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2444 if (rc & BG_ERR_CHECK)
2445 checking = 0;
2446 }
2447 #endif
2448
2449 split_offset = 0;
2450 do {
2451 /* Check to see if we ran out of space */
2452 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2453 return num_sge + 3;
2454
2455 /* setup DISEED with what we have */
2456 diseed = (struct sli4_sge_diseed *) sgl;
2457 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2458 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2459
2460 /* Endianness conversion if necessary */
2461 diseed->ref_tag = cpu_to_le32(reftag);
2462 diseed->ref_tag_tran = diseed->ref_tag;
2463
2464 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2465 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2466
2467 } else {
2468 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2469 /*
2470 * When in this mode, the hardware will replace
2471 * the guard tag from the host with a
2472 * newly generated good CRC for the wire.
2473 * Switch to raw mode here to avoid this
2474 * behavior. What the host sends gets put on the wire.
2475 */
2476 if (txop == BG_OP_IN_CRC_OUT_CRC) {
2477 txop = BG_OP_RAW_MODE;
2478 rxop = BG_OP_RAW_MODE;
2479 }
2480 }
2481
2482
2483 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2484 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2485 else
2486 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2487
2488 /* setup DISEED with the rest of the info */
2489 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2490 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2491
2492 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2493 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2494
2495 /* Endianness conversion if necessary for DISEED */
2496 diseed->word2 = cpu_to_le32(diseed->word2);
2497 diseed->word3 = cpu_to_le32(diseed->word3);
2498
2499 /* advance sgl and increment bde count */
2500 num_sge++;
2501 sgl++;
2502
2503 /* setup the first BDE that points to protection buffer */
2504 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2505 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2506
2507 /* must be integer multiple of the DIF block length */
2508 BUG_ON(protgroup_len % 8);
2509
2510 /* Now setup DIF SGE */
2511 sgl->word2 = 0;
2512 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2513 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2514 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2515 sgl->word2 = cpu_to_le32(sgl->word2);
2516
2517 protgrp_blks = protgroup_len / 8;
2518 protgrp_bytes = protgrp_blks * blksize;
2519
2520 /* check if DIF SGE is crossing the 4K boundary; if so split */
2521 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2522 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2523 protgroup_offset += protgroup_remainder;
2524 protgrp_blks = protgroup_remainder / 8;
2525 protgrp_bytes = protgrp_blks * blksize;
2526 } else {
2527 protgroup_offset = 0;
2528 curr_prot++;
2529 }
2530
2531 num_sge++;
2532
2533 /* setup SGE's for data blocks associated with DIF data */
2534 pgdone = 0;
2535 subtotal = 0; /* total bytes processed for current prot grp */
2536 while (!pgdone) {
2537 /* Check to see if we ran out of space */
2538 if (num_sge >= phba->cfg_total_seg_cnt)
2539 return num_sge + 1;
2540
2541 if (!sgde) {
2542 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2543 "9086 BLKGRD:%s Invalid data segment\n",
2544 __func__);
2545 return 0;
2546 }
2547 sgl++;
2548 dataphysaddr = sg_dma_address(sgde) + split_offset;
2549
2550 remainder = sg_dma_len(sgde) - split_offset;
2551
2552 if ((subtotal + remainder) <= protgrp_bytes) {
2553 /* we can use this whole buffer */
2554 dma_len = remainder;
2555 split_offset = 0;
2556
2557 if ((subtotal + remainder) == protgrp_bytes)
2558 pgdone = 1;
2559 } else {
2560 /* must split this buffer with next prot grp */
2561 dma_len = protgrp_bytes - subtotal;
2562 split_offset += dma_len;
2563 }
2564
2565 subtotal += dma_len;
2566
2567 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2568 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2569 bf_set(lpfc_sli4_sge_last, sgl, 0);
2570 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2571 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2572
2573 sgl->sge_len = cpu_to_le32(dma_len);
2574 dma_offset += dma_len;
2575
2576 num_sge++;
2577 curr_data++;
2578
2579 if (split_offset)
2580 break;
2581
2582 /* Move to the next s/g segment if possible */
2583 sgde = sg_next(sgde);
2584 }
2585
2586 if (protgroup_offset) {
2587 /* update the reference tag */
2588 reftag += protgrp_blks;
2589 sgl++;
2590 continue;
2591 }
2592
2593 /* are we done ? */
2594 if (curr_prot == protcnt) {
2595 bf_set(lpfc_sli4_sge_last, sgl, 1);
2596 alldone = 1;
2597 } else if (curr_prot < protcnt) {
2598 /* advance to next prot buffer */
2599 sgpe = sg_next(sgpe);
2600 sgl++;
2601
2602 /* update the reference tag */
2603 reftag += protgrp_blks;
2604 } else {
2605 /* if we're here, we have a bug */
2606 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2607 "9085 BLKGRD: bug in %s\n", __func__);
2608 }
2609
2610 } while (!alldone);
2611
2612 out:
2613
2614 return num_sge;
2615 }
2616
2617 /**
2618 * lpfc_prot_group_type - Get prtotection group type of SCSI command
2619 * @phba: The Hba for which this call is being executed.
2620 * @sc: pointer to scsi command we're working on
2621 *
2622 * Given a SCSI command that supports DIF, determine composition of protection
2623 * groups involved in setting up buffer lists
2624 *
2625 * Returns: Protection group type (with or without DIF)
2626 *
2627 **/
2628 static int
2629 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2630 {
2631 int ret = LPFC_PG_TYPE_INVALID;
2632 unsigned char op = scsi_get_prot_op(sc);
2633
2634 switch (op) {
2635 case SCSI_PROT_READ_STRIP:
2636 case SCSI_PROT_WRITE_INSERT:
2637 ret = LPFC_PG_TYPE_NO_DIF;
2638 break;
2639 case SCSI_PROT_READ_INSERT:
2640 case SCSI_PROT_WRITE_STRIP:
2641 case SCSI_PROT_READ_PASS:
2642 case SCSI_PROT_WRITE_PASS:
2643 ret = LPFC_PG_TYPE_DIF_BUF;
2644 break;
2645 default:
2646 if (phba)
2647 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2648 "9021 Unsupported protection op:%d\n",
2649 op);
2650 break;
2651 }
2652 return ret;
2653 }
2654
2655 /**
2656 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2657 * @phba: The Hba for which this call is being executed.
2658 * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2659 *
2660 * Adjust the data length to account for how much data
2661 * is actually on the wire.
2662 *
2663 * returns the adjusted data length
2664 **/
2665 static int
2666 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2667 struct lpfc_scsi_buf *lpfc_cmd)
2668 {
2669 struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2670 int fcpdl;
2671
2672 fcpdl = scsi_bufflen(sc);
2673
2674 /* Check if there is protection data on the wire */
2675 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2676 /* Read check for protection data */
2677 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT)
2678 return fcpdl;
2679
2680 } else {
2681 /* Write check for protection data */
2682 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP)
2683 return fcpdl;
2684 }
2685
2686 /*
2687 * If we are in DIF Type 1 mode every data block has a 8 byte
2688 * DIF (trailer) attached to it. Must ajust FCP data length
2689 * to account for the protection data.
2690 */
2691 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2692
2693 return fcpdl;
2694 }
2695
2696 /**
2697 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2698 * @phba: The Hba for which this call is being executed.
2699 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2700 *
2701 * This is the protection/DIF aware version of
2702 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2703 * two functions eventually, but for now, it's here
2704 **/
2705 static int
2706 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2707 struct lpfc_scsi_buf *lpfc_cmd)
2708 {
2709 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2710 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2711 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2712 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2713 uint32_t num_bde = 0;
2714 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2715 int prot_group_type = 0;
2716 int fcpdl;
2717
2718 /*
2719 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2720 * fcp_rsp regions to the first data bde entry
2721 */
2722 bpl += 2;
2723 if (scsi_sg_count(scsi_cmnd)) {
2724 /*
2725 * The driver stores the segment count returned from pci_map_sg
2726 * because this a count of dma-mappings used to map the use_sg
2727 * pages. They are not guaranteed to be the same for those
2728 * architectures that implement an IOMMU.
2729 */
2730 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2731 scsi_sglist(scsi_cmnd),
2732 scsi_sg_count(scsi_cmnd), datadir);
2733 if (unlikely(!datasegcnt))
2734 return 1;
2735
2736 lpfc_cmd->seg_cnt = datasegcnt;
2737
2738 /* First check if data segment count from SCSI Layer is good */
2739 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2740 goto err;
2741
2742 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2743
2744 switch (prot_group_type) {
2745 case LPFC_PG_TYPE_NO_DIF:
2746
2747 /* Here we need to add a PDE5 and PDE6 to the count */
2748 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2749 goto err;
2750
2751 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2752 datasegcnt);
2753 /* we should have 2 or more entries in buffer list */
2754 if (num_bde < 2)
2755 goto err;
2756 break;
2757
2758 case LPFC_PG_TYPE_DIF_BUF:
2759 /*
2760 * This type indicates that protection buffers are
2761 * passed to the driver, so that needs to be prepared
2762 * for DMA
2763 */
2764 protsegcnt = dma_map_sg(&phba->pcidev->dev,
2765 scsi_prot_sglist(scsi_cmnd),
2766 scsi_prot_sg_count(scsi_cmnd), datadir);
2767 if (unlikely(!protsegcnt)) {
2768 scsi_dma_unmap(scsi_cmnd);
2769 return 1;
2770 }
2771
2772 lpfc_cmd->prot_seg_cnt = protsegcnt;
2773
2774 /*
2775 * There is a minimun of 4 BPLs used for every
2776 * protection data segment.
2777 */
2778 if ((lpfc_cmd->prot_seg_cnt * 4) >
2779 (phba->cfg_total_seg_cnt - 2))
2780 goto err;
2781
2782 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2783 datasegcnt, protsegcnt);
2784 /* we should have 3 or more entries in buffer list */
2785 if ((num_bde < 3) ||
2786 (num_bde > phba->cfg_total_seg_cnt))
2787 goto err;
2788 break;
2789
2790 case LPFC_PG_TYPE_INVALID:
2791 default:
2792 scsi_dma_unmap(scsi_cmnd);
2793 lpfc_cmd->seg_cnt = 0;
2794
2795 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2796 "9022 Unexpected protection group %i\n",
2797 prot_group_type);
2798 return 1;
2799 }
2800 }
2801
2802 /*
2803 * Finish initializing those IOCB fields that are dependent on the
2804 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
2805 * reinitialized since all iocb memory resources are used many times
2806 * for transmit, receive, and continuation bpl's.
2807 */
2808 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2809 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2810 iocb_cmd->ulpBdeCount = 1;
2811 iocb_cmd->ulpLe = 1;
2812
2813 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2814 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2815
2816 /*
2817 * Due to difference in data length between DIF/non-DIF paths,
2818 * we need to set word 4 of IOCB here
2819 */
2820 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2821
2822 return 0;
2823 err:
2824 if (lpfc_cmd->seg_cnt)
2825 scsi_dma_unmap(scsi_cmnd);
2826 if (lpfc_cmd->prot_seg_cnt)
2827 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2828 scsi_prot_sg_count(scsi_cmnd),
2829 scsi_cmnd->sc_data_direction);
2830
2831 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2832 "9023 Cannot setup S/G List for HBA"
2833 "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2834 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2835 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2836 prot_group_type, num_bde);
2837
2838 lpfc_cmd->seg_cnt = 0;
2839 lpfc_cmd->prot_seg_cnt = 0;
2840 return 1;
2841 }
2842
2843 /*
2844 * This function calcuates the T10 DIF guard tag
2845 * on the specified data using a CRC algorithmn
2846 * using crc_t10dif.
2847 */
2848 static uint16_t
2849 lpfc_bg_crc(uint8_t *data, int count)
2850 {
2851 uint16_t crc = 0;
2852 uint16_t x;
2853
2854 crc = crc_t10dif(data, count);
2855 x = cpu_to_be16(crc);
2856 return x;
2857 }
2858
2859 /*
2860 * This function calcuates the T10 DIF guard tag
2861 * on the specified data using a CSUM algorithmn
2862 * using ip_compute_csum.
2863 */
2864 static uint16_t
2865 lpfc_bg_csum(uint8_t *data, int count)
2866 {
2867 uint16_t ret;
2868
2869 ret = ip_compute_csum(data, count);
2870 return ret;
2871 }
2872
2873 /*
2874 * This function examines the protection data to try to determine
2875 * what type of T10-DIF error occurred.
2876 */
2877 static void
2878 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2879 {
2880 struct scatterlist *sgpe; /* s/g prot entry */
2881 struct scatterlist *sgde; /* s/g data entry */
2882 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2883 struct scsi_dif_tuple *src = NULL;
2884 uint8_t *data_src = NULL;
2885 uint16_t guard_tag;
2886 uint16_t start_app_tag, app_tag;
2887 uint32_t start_ref_tag, ref_tag;
2888 int prot, protsegcnt;
2889 int err_type, len, data_len;
2890 int chk_ref, chk_app, chk_guard;
2891 uint16_t sum;
2892 unsigned blksize;
2893
2894 err_type = BGS_GUARD_ERR_MASK;
2895 sum = 0;
2896 guard_tag = 0;
2897
2898 /* First check to see if there is protection data to examine */
2899 prot = scsi_get_prot_op(cmd);
2900 if ((prot == SCSI_PROT_READ_STRIP) ||
2901 (prot == SCSI_PROT_WRITE_INSERT) ||
2902 (prot == SCSI_PROT_NORMAL))
2903 goto out;
2904
2905 /* Currently the driver just supports ref_tag and guard_tag checking */
2906 chk_ref = 1;
2907 chk_app = 0;
2908 chk_guard = 0;
2909
2910 /* Setup a ptr to the protection data provided by the SCSI host */
2911 sgpe = scsi_prot_sglist(cmd);
2912 protsegcnt = lpfc_cmd->prot_seg_cnt;
2913
2914 if (sgpe && protsegcnt) {
2915
2916 /*
2917 * We will only try to verify guard tag if the segment
2918 * data length is a multiple of the blksize.
2919 */
2920 sgde = scsi_sglist(cmd);
2921 blksize = lpfc_cmd_blksize(cmd);
2922 data_src = (uint8_t *)sg_virt(sgde);
2923 data_len = sgde->length;
2924 if ((data_len & (blksize - 1)) == 0)
2925 chk_guard = 1;
2926
2927 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2928 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2929 start_app_tag = src->app_tag;
2930 len = sgpe->length;
2931 while (src && protsegcnt) {
2932 while (len) {
2933
2934 /*
2935 * First check to see if a protection data
2936 * check is valid
2937 */
2938 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2939 (src->app_tag == T10_PI_APP_ESCAPE)) {
2940 start_ref_tag++;
2941 goto skipit;
2942 }
2943
2944 /* First Guard Tag checking */
2945 if (chk_guard) {
2946 guard_tag = src->guard_tag;
2947 if (lpfc_cmd_guard_csum(cmd))
2948 sum = lpfc_bg_csum(data_src,
2949 blksize);
2950 else
2951 sum = lpfc_bg_crc(data_src,
2952 blksize);
2953 if ((guard_tag != sum)) {
2954 err_type = BGS_GUARD_ERR_MASK;
2955 goto out;
2956 }
2957 }
2958
2959 /* Reference Tag checking */
2960 ref_tag = be32_to_cpu(src->ref_tag);
2961 if (chk_ref && (ref_tag != start_ref_tag)) {
2962 err_type = BGS_REFTAG_ERR_MASK;
2963 goto out;
2964 }
2965 start_ref_tag++;
2966
2967 /* App Tag checking */
2968 app_tag = src->app_tag;
2969 if (chk_app && (app_tag != start_app_tag)) {
2970 err_type = BGS_APPTAG_ERR_MASK;
2971 goto out;
2972 }
2973 skipit:
2974 len -= sizeof(struct scsi_dif_tuple);
2975 if (len < 0)
2976 len = 0;
2977 src++;
2978
2979 data_src += blksize;
2980 data_len -= blksize;
2981
2982 /*
2983 * Are we at the end of the Data segment?
2984 * The data segment is only used for Guard
2985 * tag checking.
2986 */
2987 if (chk_guard && (data_len == 0)) {
2988 chk_guard = 0;
2989 sgde = sg_next(sgde);
2990 if (!sgde)
2991 goto out;
2992
2993 data_src = (uint8_t *)sg_virt(sgde);
2994 data_len = sgde->length;
2995 if ((data_len & (blksize - 1)) == 0)
2996 chk_guard = 1;
2997 }
2998 }
2999
3000 /* Goto the next Protection data segment */
3001 sgpe = sg_next(sgpe);
3002 if (sgpe) {
3003 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3004 len = sgpe->length;
3005 } else {
3006 src = NULL;
3007 }
3008 protsegcnt--;
3009 }
3010 }
3011 out:
3012 if (err_type == BGS_GUARD_ERR_MASK) {
3013 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3014 0x10, 0x1);
3015 cmd->result = DRIVER_SENSE << 24
3016 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3017 phba->bg_guard_err_cnt++;
3018 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3019 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3020 (unsigned long)scsi_get_lba(cmd),
3021 sum, guard_tag);
3022
3023 } else if (err_type == BGS_REFTAG_ERR_MASK) {
3024 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3025 0x10, 0x3);
3026 cmd->result = DRIVER_SENSE << 24
3027 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3028
3029 phba->bg_reftag_err_cnt++;
3030 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3031 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3032 (unsigned long)scsi_get_lba(cmd),
3033 ref_tag, start_ref_tag);
3034
3035 } else if (err_type == BGS_APPTAG_ERR_MASK) {
3036 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3037 0x10, 0x2);
3038 cmd->result = DRIVER_SENSE << 24
3039 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3040
3041 phba->bg_apptag_err_cnt++;
3042 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3043 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3044 (unsigned long)scsi_get_lba(cmd),
3045 app_tag, start_app_tag);
3046 }
3047 }
3048
3049
3050 /*
3051 * This function checks for BlockGuard errors detected by
3052 * the HBA. In case of errors, the ASC/ASCQ fields in the
3053 * sense buffer will be set accordingly, paired with
3054 * ILLEGAL_REQUEST to signal to the kernel that the HBA
3055 * detected corruption.
3056 *
3057 * Returns:
3058 * 0 - No error found
3059 * 1 - BlockGuard error found
3060 * -1 - Internal error (bad profile, ...etc)
3061 */
3062 static int
3063 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3064 struct lpfc_iocbq *pIocbOut)
3065 {
3066 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3067 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3068 int ret = 0;
3069 uint32_t bghm = bgf->bghm;
3070 uint32_t bgstat = bgf->bgstat;
3071 uint64_t failing_sector = 0;
3072
3073 spin_lock(&_dump_buf_lock);
3074 if (!_dump_buf_done) {
3075 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
3076 " Data for %u blocks to debugfs\n",
3077 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3078 lpfc_debug_save_data(phba, cmd);
3079
3080 /* If we have a prot sgl, save the DIF buffer */
3081 if (lpfc_prot_group_type(phba, cmd) ==
3082 LPFC_PG_TYPE_DIF_BUF) {
3083 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3084 "Saving DIF for %u blocks to debugfs\n",
3085 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3086 lpfc_debug_save_dif(phba, cmd);
3087 }
3088
3089 _dump_buf_done = 1;
3090 }
3091 spin_unlock(&_dump_buf_lock);
3092
3093 if (lpfc_bgs_get_invalid_prof(bgstat)) {
3094 cmd->result = ScsiResult(DID_ERROR, 0);
3095 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3096 "9072 BLKGRD: Invalid BG Profile in cmd"
3097 " 0x%x lba 0x%llx blk cnt 0x%x "
3098 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3099 (unsigned long long)scsi_get_lba(cmd),
3100 blk_rq_sectors(cmd->request), bgstat, bghm);
3101 ret = (-1);
3102 goto out;
3103 }
3104
3105 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3106 cmd->result = ScsiResult(DID_ERROR, 0);
3107 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3108 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3109 " 0x%x lba 0x%llx blk cnt 0x%x "
3110 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3111 (unsigned long long)scsi_get_lba(cmd),
3112 blk_rq_sectors(cmd->request), bgstat, bghm);
3113 ret = (-1);
3114 goto out;
3115 }
3116
3117 if (lpfc_bgs_get_guard_err(bgstat)) {
3118 ret = 1;
3119
3120 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3121 0x10, 0x1);
3122 cmd->result = DRIVER_SENSE << 24
3123 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3124 phba->bg_guard_err_cnt++;
3125 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3126 "9055 BLKGRD: Guard Tag error in cmd"
3127 " 0x%x lba 0x%llx blk cnt 0x%x "
3128 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3129 (unsigned long long)scsi_get_lba(cmd),
3130 blk_rq_sectors(cmd->request), bgstat, bghm);
3131 }
3132
3133 if (lpfc_bgs_get_reftag_err(bgstat)) {
3134 ret = 1;
3135
3136 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3137 0x10, 0x3);
3138 cmd->result = DRIVER_SENSE << 24
3139 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3140
3141 phba->bg_reftag_err_cnt++;
3142 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3143 "9056 BLKGRD: Ref Tag error in cmd"
3144 " 0x%x lba 0x%llx blk cnt 0x%x "
3145 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3146 (unsigned long long)scsi_get_lba(cmd),
3147 blk_rq_sectors(cmd->request), bgstat, bghm);
3148 }
3149
3150 if (lpfc_bgs_get_apptag_err(bgstat)) {
3151 ret = 1;
3152
3153 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3154 0x10, 0x2);
3155 cmd->result = DRIVER_SENSE << 24
3156 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3157
3158 phba->bg_apptag_err_cnt++;
3159 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3160 "9061 BLKGRD: App Tag error in cmd"
3161 " 0x%x lba 0x%llx blk cnt 0x%x "
3162 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3163 (unsigned long long)scsi_get_lba(cmd),
3164 blk_rq_sectors(cmd->request), bgstat, bghm);
3165 }
3166
3167 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3168 /*
3169 * setup sense data descriptor 0 per SPC-4 as an information
3170 * field, and put the failing LBA in it.
3171 * This code assumes there was also a guard/app/ref tag error
3172 * indication.
3173 */
3174 cmd->sense_buffer[7] = 0xc; /* Additional sense length */
3175 cmd->sense_buffer[8] = 0; /* Information descriptor type */
3176 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
3177 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3178
3179 /* bghm is a "on the wire" FC frame based count */
3180 switch (scsi_get_prot_op(cmd)) {
3181 case SCSI_PROT_READ_INSERT:
3182 case SCSI_PROT_WRITE_STRIP:
3183 bghm /= cmd->device->sector_size;
3184 break;
3185 case SCSI_PROT_READ_STRIP:
3186 case SCSI_PROT_WRITE_INSERT:
3187 case SCSI_PROT_READ_PASS:
3188 case SCSI_PROT_WRITE_PASS:
3189 bghm /= (cmd->device->sector_size +
3190 sizeof(struct scsi_dif_tuple));
3191 break;
3192 }
3193
3194 failing_sector = scsi_get_lba(cmd);
3195 failing_sector += bghm;
3196
3197 /* Descriptor Information */
3198 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3199 }
3200
3201 if (!ret) {
3202 /* No error was reported - problem in FW? */
3203 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3204 "9057 BLKGRD: Unknown error in cmd"
3205 " 0x%x lba 0x%llx blk cnt 0x%x "
3206 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3207 (unsigned long long)scsi_get_lba(cmd),
3208 blk_rq_sectors(cmd->request), bgstat, bghm);
3209
3210 /* Calcuate what type of error it was */
3211 lpfc_calc_bg_err(phba, lpfc_cmd);
3212 }
3213 out:
3214 return ret;
3215 }
3216
3217 /**
3218 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3219 * @phba: The Hba for which this call is being executed.
3220 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3221 *
3222 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3223 * field of @lpfc_cmd for device with SLI-4 interface spec.
3224 *
3225 * Return codes:
3226 * 1 - Error
3227 * 0 - Success
3228 **/
3229 static int
3230 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3231 {
3232 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3233 struct scatterlist *sgel = NULL;
3234 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3235 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3236 struct sli4_sge *first_data_sgl;
3237 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3238 dma_addr_t physaddr;
3239 uint32_t num_bde = 0;
3240 uint32_t dma_len;
3241 uint32_t dma_offset = 0;
3242 int nseg;
3243 struct ulp_bde64 *bde;
3244
3245 /*
3246 * There are three possibilities here - use scatter-gather segment, use
3247 * the single mapping, or neither. Start the lpfc command prep by
3248 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3249 * data bde entry.
3250 */
3251 if (scsi_sg_count(scsi_cmnd)) {
3252 /*
3253 * The driver stores the segment count returned from pci_map_sg
3254 * because this a count of dma-mappings used to map the use_sg
3255 * pages. They are not guaranteed to be the same for those
3256 * architectures that implement an IOMMU.
3257 */
3258
3259 nseg = scsi_dma_map(scsi_cmnd);
3260 if (unlikely(nseg <= 0))
3261 return 1;
3262 sgl += 1;
3263 /* clear the last flag in the fcp_rsp map entry */
3264 sgl->word2 = le32_to_cpu(sgl->word2);
3265 bf_set(lpfc_sli4_sge_last, sgl, 0);
3266 sgl->word2 = cpu_to_le32(sgl->word2);
3267 sgl += 1;
3268 first_data_sgl = sgl;
3269 lpfc_cmd->seg_cnt = nseg;
3270 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3271 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3272 " %s: Too many sg segments from "
3273 "dma_map_sg. Config %d, seg_cnt %d\n",
3274 __func__, phba->cfg_sg_seg_cnt,
3275 lpfc_cmd->seg_cnt);
3276 lpfc_cmd->seg_cnt = 0;
3277 scsi_dma_unmap(scsi_cmnd);
3278 return 1;
3279 }
3280
3281 /*
3282 * The driver established a maximum scatter-gather segment count
3283 * during probe that limits the number of sg elements in any
3284 * single scsi command. Just run through the seg_cnt and format
3285 * the sge's.
3286 * When using SLI-3 the driver will try to fit all the BDEs into
3287 * the IOCB. If it can't then the BDEs get added to a BPL as it
3288 * does for SLI-2 mode.
3289 */
3290 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3291 physaddr = sg_dma_address(sgel);
3292 dma_len = sg_dma_len(sgel);
3293 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3294 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3295 sgl->word2 = le32_to_cpu(sgl->word2);
3296 if ((num_bde + 1) == nseg)
3297 bf_set(lpfc_sli4_sge_last, sgl, 1);
3298 else
3299 bf_set(lpfc_sli4_sge_last, sgl, 0);
3300 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3301 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3302 sgl->word2 = cpu_to_le32(sgl->word2);
3303 sgl->sge_len = cpu_to_le32(dma_len);
3304 dma_offset += dma_len;
3305 sgl++;
3306 }
3307 /* setup the performance hint (first data BDE) if enabled */
3308 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3309 bde = (struct ulp_bde64 *)
3310 &(iocb_cmd->unsli3.sli3Words[5]);
3311 bde->addrLow = first_data_sgl->addr_lo;
3312 bde->addrHigh = first_data_sgl->addr_hi;
3313 bde->tus.f.bdeSize =
3314 le32_to_cpu(first_data_sgl->sge_len);
3315 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3316 bde->tus.w = cpu_to_le32(bde->tus.w);
3317 }
3318 } else {
3319 sgl += 1;
3320 /* clear the last flag in the fcp_rsp map entry */
3321 sgl->word2 = le32_to_cpu(sgl->word2);
3322 bf_set(lpfc_sli4_sge_last, sgl, 1);
3323 sgl->word2 = cpu_to_le32(sgl->word2);
3324 }
3325
3326 /*
3327 * Finish initializing those IOCB fields that are dependent on the
3328 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
3329 * explicitly reinitialized.
3330 * all iocb memory resources are reused.
3331 */
3332 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3333
3334 /*
3335 * Due to difference in data length between DIF/non-DIF paths,
3336 * we need to set word 4 of IOCB here
3337 */
3338 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3339
3340 /*
3341 * If the OAS driver feature is enabled and the lun is enabled for
3342 * OAS, set the oas iocb related flags.
3343 */
3344 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3345 scsi_cmnd->device->hostdata)->oas_enabled) {
3346 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3347 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3348 scsi_cmnd->device->hostdata)->priority;
3349 }
3350 return 0;
3351 }
3352
3353 /**
3354 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3355 * @phba: The Hba for which this call is being executed.
3356 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3357 *
3358 * This is the protection/DIF aware version of
3359 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3360 * two functions eventually, but for now, it's here
3361 **/
3362 static int
3363 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3364 struct lpfc_scsi_buf *lpfc_cmd)
3365 {
3366 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3367 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3368 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3369 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3370 uint32_t num_sge = 0;
3371 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3372 int prot_group_type = 0;
3373 int fcpdl;
3374
3375 /*
3376 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3377 * fcp_rsp regions to the first data sge entry
3378 */
3379 if (scsi_sg_count(scsi_cmnd)) {
3380 /*
3381 * The driver stores the segment count returned from pci_map_sg
3382 * because this a count of dma-mappings used to map the use_sg
3383 * pages. They are not guaranteed to be the same for those
3384 * architectures that implement an IOMMU.
3385 */
3386 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3387 scsi_sglist(scsi_cmnd),
3388 scsi_sg_count(scsi_cmnd), datadir);
3389 if (unlikely(!datasegcnt))
3390 return 1;
3391
3392 sgl += 1;
3393 /* clear the last flag in the fcp_rsp map entry */
3394 sgl->word2 = le32_to_cpu(sgl->word2);
3395 bf_set(lpfc_sli4_sge_last, sgl, 0);
3396 sgl->word2 = cpu_to_le32(sgl->word2);
3397
3398 sgl += 1;
3399 lpfc_cmd->seg_cnt = datasegcnt;
3400
3401 /* First check if data segment count from SCSI Layer is good */
3402 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3403 goto err;
3404
3405 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3406
3407 switch (prot_group_type) {
3408 case LPFC_PG_TYPE_NO_DIF:
3409 /* Here we need to add a DISEED to the count */
3410 if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3411 goto err;
3412
3413 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3414 datasegcnt);
3415
3416 /* we should have 2 or more entries in buffer list */
3417 if (num_sge < 2)
3418 goto err;
3419 break;
3420
3421 case LPFC_PG_TYPE_DIF_BUF:
3422 /*
3423 * This type indicates that protection buffers are
3424 * passed to the driver, so that needs to be prepared
3425 * for DMA
3426 */
3427 protsegcnt = dma_map_sg(&phba->pcidev->dev,
3428 scsi_prot_sglist(scsi_cmnd),
3429 scsi_prot_sg_count(scsi_cmnd), datadir);
3430 if (unlikely(!protsegcnt)) {
3431 scsi_dma_unmap(scsi_cmnd);
3432 return 1;
3433 }
3434
3435 lpfc_cmd->prot_seg_cnt = protsegcnt;
3436 /*
3437 * There is a minimun of 3 SGEs used for every
3438 * protection data segment.
3439 */
3440 if ((lpfc_cmd->prot_seg_cnt * 3) >
3441 (phba->cfg_total_seg_cnt - 2))
3442 goto err;
3443
3444 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3445 datasegcnt, protsegcnt);
3446
3447 /* we should have 3 or more entries in buffer list */
3448 if ((num_sge < 3) ||
3449 (num_sge > phba->cfg_total_seg_cnt))
3450 goto err;
3451 break;
3452
3453 case LPFC_PG_TYPE_INVALID:
3454 default:
3455 scsi_dma_unmap(scsi_cmnd);
3456 lpfc_cmd->seg_cnt = 0;
3457
3458 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3459 "9083 Unexpected protection group %i\n",
3460 prot_group_type);
3461 return 1;
3462 }
3463 }
3464
3465 switch (scsi_get_prot_op(scsi_cmnd)) {
3466 case SCSI_PROT_WRITE_STRIP:
3467 case SCSI_PROT_READ_STRIP:
3468 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3469 break;
3470 case SCSI_PROT_WRITE_INSERT:
3471 case SCSI_PROT_READ_INSERT:
3472 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3473 break;
3474 case SCSI_PROT_WRITE_PASS:
3475 case SCSI_PROT_READ_PASS:
3476 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3477 break;
3478 }
3479
3480 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3481 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3482
3483 /*
3484 * Due to difference in data length between DIF/non-DIF paths,
3485 * we need to set word 4 of IOCB here
3486 */
3487 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3488
3489 /*
3490 * If the OAS driver feature is enabled and the lun is enabled for
3491 * OAS, set the oas iocb related flags.
3492 */
3493 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3494 scsi_cmnd->device->hostdata)->oas_enabled)
3495 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3496
3497 return 0;
3498 err:
3499 if (lpfc_cmd->seg_cnt)
3500 scsi_dma_unmap(scsi_cmnd);
3501 if (lpfc_cmd->prot_seg_cnt)
3502 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3503 scsi_prot_sg_count(scsi_cmnd),
3504 scsi_cmnd->sc_data_direction);
3505
3506 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3507 "9084 Cannot setup S/G List for HBA"
3508 "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3509 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3510 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3511 prot_group_type, num_sge);
3512
3513 lpfc_cmd->seg_cnt = 0;
3514 lpfc_cmd->prot_seg_cnt = 0;
3515 return 1;
3516 }
3517
3518 /**
3519 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3520 * @phba: The Hba for which this call is being executed.
3521 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3522 *
3523 * This routine wraps the actual DMA mapping function pointer from the
3524 * lpfc_hba struct.
3525 *
3526 * Return codes:
3527 * 1 - Error
3528 * 0 - Success
3529 **/
3530 static inline int
3531 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3532 {
3533 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3534 }
3535
3536 /**
3537 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3538 * using BlockGuard.
3539 * @phba: The Hba for which this call is being executed.
3540 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3541 *
3542 * This routine wraps the actual DMA mapping function pointer from the
3543 * lpfc_hba struct.
3544 *
3545 * Return codes:
3546 * 1 - Error
3547 * 0 - Success
3548 **/
3549 static inline int
3550 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3551 {
3552 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3553 }
3554
3555 /**
3556 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3557 * @phba: Pointer to hba context object.
3558 * @vport: Pointer to vport object.
3559 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3560 * @rsp_iocb: Pointer to response iocb object which reported error.
3561 *
3562 * This function posts an event when there is a SCSI command reporting
3563 * error from the scsi device.
3564 **/
3565 static void
3566 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3567 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3568 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3569 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3570 uint32_t resp_info = fcprsp->rspStatus2;
3571 uint32_t scsi_status = fcprsp->rspStatus3;
3572 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3573 struct lpfc_fast_path_event *fast_path_evt = NULL;
3574 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3575 unsigned long flags;
3576
3577 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3578 return;
3579
3580 /* If there is queuefull or busy condition send a scsi event */
3581 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3582 (cmnd->result == SAM_STAT_BUSY)) {
3583 fast_path_evt = lpfc_alloc_fast_evt(phba);
3584 if (!fast_path_evt)
3585 return;
3586 fast_path_evt->un.scsi_evt.event_type =
3587 FC_REG_SCSI_EVENT;
3588 fast_path_evt->un.scsi_evt.subcategory =
3589 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3590 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3591 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3592 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3593 &pnode->nlp_portname, sizeof(struct lpfc_name));
3594 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3595 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3596 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3597 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3598 fast_path_evt = lpfc_alloc_fast_evt(phba);
3599 if (!fast_path_evt)
3600 return;
3601 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3602 FC_REG_SCSI_EVENT;
3603 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3604 LPFC_EVENT_CHECK_COND;
3605 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3606 cmnd->device->lun;
3607 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3608 &pnode->nlp_portname, sizeof(struct lpfc_name));
3609 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3610 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3611 fast_path_evt->un.check_cond_evt.sense_key =
3612 cmnd->sense_buffer[2] & 0xf;
3613 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3614 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3615 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3616 fcpi_parm &&
3617 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3618 ((scsi_status == SAM_STAT_GOOD) &&
3619 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3620 /*
3621 * If status is good or resid does not match with fcp_param and
3622 * there is valid fcpi_parm, then there is a read_check error
3623 */
3624 fast_path_evt = lpfc_alloc_fast_evt(phba);
3625 if (!fast_path_evt)
3626 return;
3627 fast_path_evt->un.read_check_error.header.event_type =
3628 FC_REG_FABRIC_EVENT;
3629 fast_path_evt->un.read_check_error.header.subcategory =
3630 LPFC_EVENT_FCPRDCHKERR;
3631 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3632 &pnode->nlp_portname, sizeof(struct lpfc_name));
3633 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3634 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3635 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3636 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3637 fast_path_evt->un.read_check_error.fcpiparam =
3638 fcpi_parm;
3639 } else
3640 return;
3641
3642 fast_path_evt->vport = vport;
3643 spin_lock_irqsave(&phba->hbalock, flags);
3644 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3645 spin_unlock_irqrestore(&phba->hbalock, flags);
3646 lpfc_worker_wake_up(phba);
3647 return;
3648 }
3649
3650 /**
3651 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3652 * @phba: The HBA for which this call is being executed.
3653 * @psb: The scsi buffer which is going to be un-mapped.
3654 *
3655 * This routine does DMA un-mapping of scatter gather list of scsi command
3656 * field of @lpfc_cmd for device with SLI-3 interface spec.
3657 **/
3658 static void
3659 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3660 {
3661 /*
3662 * There are only two special cases to consider. (1) the scsi command
3663 * requested scatter-gather usage or (2) the scsi command allocated
3664 * a request buffer, but did not request use_sg. There is a third
3665 * case, but it does not require resource deallocation.
3666 */
3667 if (psb->seg_cnt > 0)
3668 scsi_dma_unmap(psb->pCmd);
3669 if (psb->prot_seg_cnt > 0)
3670 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3671 scsi_prot_sg_count(psb->pCmd),
3672 psb->pCmd->sc_data_direction);
3673 }
3674
3675 /**
3676 * lpfc_handler_fcp_err - FCP response handler
3677 * @vport: The virtual port for which this call is being executed.
3678 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3679 * @rsp_iocb: The response IOCB which contains FCP error.
3680 *
3681 * This routine is called to process response IOCB with status field
3682 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3683 * based upon SCSI and FCP error.
3684 **/
3685 static void
3686 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3687 struct lpfc_iocbq *rsp_iocb)
3688 {
3689 struct lpfc_hba *phba = vport->phba;
3690 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3691 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3692 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3693 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3694 uint32_t resp_info = fcprsp->rspStatus2;
3695 uint32_t scsi_status = fcprsp->rspStatus3;
3696 uint32_t *lp;
3697 uint32_t host_status = DID_OK;
3698 uint32_t rsplen = 0;
3699 uint32_t fcpDl;
3700 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3701
3702
3703 /*
3704 * If this is a task management command, there is no
3705 * scsi packet associated with this lpfc_cmd. The driver
3706 * consumes it.
3707 */
3708 if (fcpcmd->fcpCntl2) {
3709 scsi_status = 0;
3710 goto out;
3711 }
3712
3713 if (resp_info & RSP_LEN_VALID) {
3714 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3715 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3716 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3717 "2719 Invalid response length: "
3718 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3719 cmnd->device->id,
3720 cmnd->device->lun, cmnd->cmnd[0],
3721 rsplen);
3722 host_status = DID_ERROR;
3723 goto out;
3724 }
3725 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3726 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3727 "2757 Protocol failure detected during "
3728 "processing of FCP I/O op: "
3729 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3730 cmnd->device->id,
3731 cmnd->device->lun, cmnd->cmnd[0],
3732 fcprsp->rspInfo3);
3733 host_status = DID_ERROR;
3734 goto out;
3735 }
3736 }
3737
3738 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3739 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3740 if (snslen > SCSI_SENSE_BUFFERSIZE)
3741 snslen = SCSI_SENSE_BUFFERSIZE;
3742
3743 if (resp_info & RSP_LEN_VALID)
3744 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3745 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3746 }
3747 lp = (uint32_t *)cmnd->sense_buffer;
3748
3749 /* special handling for under run conditions */
3750 if (!scsi_status && (resp_info & RESID_UNDER)) {
3751 /* don't log under runs if fcp set... */
3752 if (vport->cfg_log_verbose & LOG_FCP)
3753 logit = LOG_FCP_ERROR;
3754 /* unless operator says so */
3755 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3756 logit = LOG_FCP_UNDER;
3757 }
3758
3759 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3760 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3761 "Data: x%x x%x x%x x%x x%x\n",
3762 cmnd->cmnd[0], scsi_status,
3763 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3764 be32_to_cpu(fcprsp->rspResId),
3765 be32_to_cpu(fcprsp->rspSnsLen),
3766 be32_to_cpu(fcprsp->rspRspLen),
3767 fcprsp->rspInfo3);
3768
3769 scsi_set_resid(cmnd, 0);
3770 fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3771 if (resp_info & RESID_UNDER) {
3772 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3773
3774 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3775 "9025 FCP Read Underrun, expected %d, "
3776 "residual %d Data: x%x x%x x%x\n",
3777 fcpDl,
3778 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3779 cmnd->underflow);
3780
3781 /*
3782 * If there is an under run check if under run reported by
3783 * storage array is same as the under run reported by HBA.
3784 * If this is not same, there is a dropped frame.
3785 */
3786 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3787 fcpi_parm &&
3788 (scsi_get_resid(cmnd) != fcpi_parm)) {
3789 lpfc_printf_vlog(vport, KERN_WARNING,
3790 LOG_FCP | LOG_FCP_ERROR,
3791 "9026 FCP Read Check Error "
3792 "and Underrun Data: x%x x%x x%x x%x\n",
3793 fcpDl,
3794 scsi_get_resid(cmnd), fcpi_parm,
3795 cmnd->cmnd[0]);
3796 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3797 host_status = DID_ERROR;
3798 }
3799 /*
3800 * The cmnd->underflow is the minimum number of bytes that must
3801 * be transferred for this command. Provided a sense condition
3802 * is not present, make sure the actual amount transferred is at
3803 * least the underflow value or fail.
3804 */
3805 if (!(resp_info & SNS_LEN_VALID) &&
3806 (scsi_status == SAM_STAT_GOOD) &&
3807 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3808 < cmnd->underflow)) {
3809 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3810 "9027 FCP command x%x residual "
3811 "underrun converted to error "
3812 "Data: x%x x%x x%x\n",
3813 cmnd->cmnd[0], scsi_bufflen(cmnd),
3814 scsi_get_resid(cmnd), cmnd->underflow);
3815 host_status = DID_ERROR;
3816 }
3817 } else if (resp_info & RESID_OVER) {
3818 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3819 "9028 FCP command x%x residual overrun error. "
3820 "Data: x%x x%x\n", cmnd->cmnd[0],
3821 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3822 host_status = DID_ERROR;
3823
3824 /*
3825 * Check SLI validation that all the transfer was actually done
3826 * (fcpi_parm should be zero). Apply check only to reads.
3827 */
3828 } else if (fcpi_parm) {
3829 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3830 "9029 FCP %s Check Error xri x%x Data: "
3831 "x%x x%x x%x x%x x%x\n",
3832 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
3833 "Read" : "Write"),
3834 ((phba->sli_rev == LPFC_SLI_REV4) ?
3835 lpfc_cmd->cur_iocbq.sli4_xritag :
3836 rsp_iocb->iocb.ulpContext),
3837 fcpDl, be32_to_cpu(fcprsp->rspResId),
3838 fcpi_parm, cmnd->cmnd[0], scsi_status);
3839
3840 /* There is some issue with the LPe12000 that causes it
3841 * to miscalculate the fcpi_parm and falsely trip this
3842 * recovery logic. Detect this case and don't error when true.
3843 */
3844 if (fcpi_parm > fcpDl)
3845 goto out;
3846
3847 switch (scsi_status) {
3848 case SAM_STAT_GOOD:
3849 case SAM_STAT_CHECK_CONDITION:
3850 /* Fabric dropped a data frame. Fail any successful
3851 * command in which we detected dropped frames.
3852 * A status of good or some check conditions could
3853 * be considered a successful command.
3854 */
3855 host_status = DID_ERROR;
3856 break;
3857 }
3858 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3859 }
3860
3861 out:
3862 cmnd->result = ScsiResult(host_status, scsi_status);
3863 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3864 }
3865
3866 /**
3867 * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
3868 * @phba: Pointer to HBA context object.
3869 *
3870 * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
3871 * distribution. This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
3872 * held.
3873 * If scsi-mq is enabled, get the default block layer mapping of software queues
3874 * to hardware queues. This information is saved in request tag.
3875 *
3876 * Return: index into SLI4 fast-path FCP queue index.
3877 **/
3878 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
3879 struct lpfc_scsi_buf *lpfc_cmd)
3880 {
3881 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3882 struct lpfc_vector_map_info *cpup;
3883 int chann, cpu;
3884 uint32_t tag;
3885 uint16_t hwq;
3886
3887 if (cmnd && shost_use_blk_mq(cmnd->device->host)) {
3888 tag = blk_mq_unique_tag(cmnd->request);
3889 hwq = blk_mq_unique_tag_to_hwq(tag);
3890
3891 return hwq;
3892 }
3893
3894 if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
3895 && phba->cfg_fcp_io_channel > 1) {
3896 cpu = smp_processor_id();
3897 if (cpu < phba->sli4_hba.num_present_cpu) {
3898 cpup = phba->sli4_hba.cpu_map;
3899 cpup += cpu;
3900 return cpup->channel_id;
3901 }
3902 }
3903 chann = atomic_add_return(1, &phba->fcp_qidx);
3904 chann = chann % phba->cfg_fcp_io_channel;
3905 return chann;
3906 }
3907
3908
3909 /**
3910 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3911 * @phba: The Hba for which this call is being executed.
3912 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3913 * @pIocbOut: The response IOCBQ for the scsi cmnd.
3914 *
3915 * This routine assigns scsi command result by looking into response IOCB
3916 * status field appropriately. This routine handles QUEUE FULL condition as
3917 * well by ramping down device queue depth.
3918 **/
3919 static void
3920 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3921 struct lpfc_iocbq *pIocbOut)
3922 {
3923 struct lpfc_scsi_buf *lpfc_cmd =
3924 (struct lpfc_scsi_buf *) pIocbIn->context1;
3925 struct lpfc_vport *vport = pIocbIn->vport;
3926 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3927 struct lpfc_nodelist *pnode = rdata->pnode;
3928 struct scsi_cmnd *cmd;
3929 int depth;
3930 unsigned long flags;
3931 struct lpfc_fast_path_event *fast_path_evt;
3932 struct Scsi_Host *shost;
3933 uint32_t logit = LOG_FCP;
3934
3935 atomic_inc(&phba->fc4ScsiIoCmpls);
3936
3937 /* Sanity check on return of outstanding command */
3938 cmd = lpfc_cmd->pCmd;
3939 if (!cmd)
3940 return;
3941 shost = cmd->device->host;
3942
3943 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3944 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3945 /* pick up SLI4 exhange busy status from HBA */
3946 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3947
3948 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3949 if (lpfc_cmd->prot_data_type) {
3950 struct scsi_dif_tuple *src = NULL;
3951
3952 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3953 /*
3954 * Used to restore any changes to protection
3955 * data for error injection.
3956 */
3957 switch (lpfc_cmd->prot_data_type) {
3958 case LPFC_INJERR_REFTAG:
3959 src->ref_tag =
3960 lpfc_cmd->prot_data;
3961 break;
3962 case LPFC_INJERR_APPTAG:
3963 src->app_tag =
3964 (uint16_t)lpfc_cmd->prot_data;
3965 break;
3966 case LPFC_INJERR_GUARD:
3967 src->guard_tag =
3968 (uint16_t)lpfc_cmd->prot_data;
3969 break;
3970 default:
3971 break;
3972 }
3973
3974 lpfc_cmd->prot_data = 0;
3975 lpfc_cmd->prot_data_type = 0;
3976 lpfc_cmd->prot_data_segment = NULL;
3977 }
3978 #endif
3979
3980 if (pnode && NLP_CHK_NODE_ACT(pnode))
3981 atomic_dec(&pnode->cmd_pending);
3982
3983 if (lpfc_cmd->status) {
3984 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3985 (lpfc_cmd->result & IOERR_DRVR_MASK))
3986 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3987 else if (lpfc_cmd->status >= IOSTAT_CNT)
3988 lpfc_cmd->status = IOSTAT_DEFAULT;
3989 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3990 !lpfc_cmd->fcp_rsp->rspStatus3 &&
3991 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3992 !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3993 logit = 0;
3994 else
3995 logit = LOG_FCP | LOG_FCP_UNDER;
3996 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3997 "9030 FCP cmd x%x failed <%d/%lld> "
3998 "status: x%x result: x%x "
3999 "sid: x%x did: x%x oxid: x%x "
4000 "Data: x%x x%x\n",
4001 cmd->cmnd[0],
4002 cmd->device ? cmd->device->id : 0xffff,
4003 cmd->device ? cmd->device->lun : 0xffff,
4004 lpfc_cmd->status, lpfc_cmd->result,
4005 vport->fc_myDID,
4006 (pnode) ? pnode->nlp_DID : 0,
4007 phba->sli_rev == LPFC_SLI_REV4 ?
4008 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4009 pIocbOut->iocb.ulpContext,
4010 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4011
4012 switch (lpfc_cmd->status) {
4013 case IOSTAT_FCP_RSP_ERROR:
4014 /* Call FCP RSP handler to determine result */
4015 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4016 break;
4017 case IOSTAT_NPORT_BSY:
4018 case IOSTAT_FABRIC_BSY:
4019 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4020 fast_path_evt = lpfc_alloc_fast_evt(phba);
4021 if (!fast_path_evt)
4022 break;
4023 fast_path_evt->un.fabric_evt.event_type =
4024 FC_REG_FABRIC_EVENT;
4025 fast_path_evt->un.fabric_evt.subcategory =
4026 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4027 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4028 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4029 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4030 &pnode->nlp_portname,
4031 sizeof(struct lpfc_name));
4032 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4033 &pnode->nlp_nodename,
4034 sizeof(struct lpfc_name));
4035 }
4036 fast_path_evt->vport = vport;
4037 fast_path_evt->work_evt.evt =
4038 LPFC_EVT_FASTPATH_MGMT_EVT;
4039 spin_lock_irqsave(&phba->hbalock, flags);
4040 list_add_tail(&fast_path_evt->work_evt.evt_listp,
4041 &phba->work_list);
4042 spin_unlock_irqrestore(&phba->hbalock, flags);
4043 lpfc_worker_wake_up(phba);
4044 break;
4045 case IOSTAT_LOCAL_REJECT:
4046 case IOSTAT_REMOTE_STOP:
4047 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4048 lpfc_cmd->result ==
4049 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4050 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4051 lpfc_cmd->result ==
4052 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4053 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4054 break;
4055 }
4056 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4057 lpfc_cmd->result == IOERR_NO_RESOURCES ||
4058 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4059 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4060 cmd->result = ScsiResult(DID_REQUEUE, 0);
4061 break;
4062 }
4063 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4064 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4065 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4066 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4067 /*
4068 * This is a response for a BG enabled
4069 * cmd. Parse BG error
4070 */
4071 lpfc_parse_bg_err(phba, lpfc_cmd,
4072 pIocbOut);
4073 break;
4074 } else {
4075 lpfc_printf_vlog(vport, KERN_WARNING,
4076 LOG_BG,
4077 "9031 non-zero BGSTAT "
4078 "on unprotected cmd\n");
4079 }
4080 }
4081 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4082 && (phba->sli_rev == LPFC_SLI_REV4)
4083 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4084 /* This IO was aborted by the target, we don't
4085 * know the rxid and because we did not send the
4086 * ABTS we cannot generate and RRQ.
4087 */
4088 lpfc_set_rrq_active(phba, pnode,
4089 lpfc_cmd->cur_iocbq.sli4_lxritag,
4090 0, 0);
4091 }
4092 /* else: fall through */
4093 default:
4094 cmd->result = ScsiResult(DID_ERROR, 0);
4095 break;
4096 }
4097
4098 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4099 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4100 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4101 SAM_STAT_BUSY);
4102 } else
4103 cmd->result = ScsiResult(DID_OK, 0);
4104
4105 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4106 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4107
4108 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4109 "0710 Iodone <%d/%llu> cmd %p, error "
4110 "x%x SNS x%x x%x Data: x%x x%x\n",
4111 cmd->device->id, cmd->device->lun, cmd,
4112 cmd->result, *lp, *(lp + 3), cmd->retries,
4113 scsi_get_resid(cmd));
4114 }
4115
4116 lpfc_update_stats(phba, lpfc_cmd);
4117 if (vport->cfg_max_scsicmpl_time &&
4118 time_after(jiffies, lpfc_cmd->start_time +
4119 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4120 spin_lock_irqsave(shost->host_lock, flags);
4121 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4122 if (pnode->cmd_qdepth >
4123 atomic_read(&pnode->cmd_pending) &&
4124 (atomic_read(&pnode->cmd_pending) >
4125 LPFC_MIN_TGT_QDEPTH) &&
4126 ((cmd->cmnd[0] == READ_10) ||
4127 (cmd->cmnd[0] == WRITE_10)))
4128 pnode->cmd_qdepth =
4129 atomic_read(&pnode->cmd_pending);
4130
4131 pnode->last_change_time = jiffies;
4132 }
4133 spin_unlock_irqrestore(shost->host_lock, flags);
4134 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4135 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4136 time_after(jiffies, pnode->last_change_time +
4137 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4138 spin_lock_irqsave(shost->host_lock, flags);
4139 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4140 / 100;
4141 depth = depth ? depth : 1;
4142 pnode->cmd_qdepth += depth;
4143 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4144 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4145 pnode->last_change_time = jiffies;
4146 spin_unlock_irqrestore(shost->host_lock, flags);
4147 }
4148 }
4149
4150 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4151
4152 spin_lock_irqsave(&phba->hbalock, flags);
4153 lpfc_cmd->pCmd = NULL;
4154 spin_unlock_irqrestore(&phba->hbalock, flags);
4155
4156 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4157 cmd->scsi_done(cmd);
4158
4159 /*
4160 * If there is a thread waiting for command completion
4161 * wake up the thread.
4162 */
4163 spin_lock_irqsave(shost->host_lock, flags);
4164 if (lpfc_cmd->waitq)
4165 wake_up(lpfc_cmd->waitq);
4166 spin_unlock_irqrestore(shost->host_lock, flags);
4167
4168 lpfc_release_scsi_buf(phba, lpfc_cmd);
4169 }
4170
4171 /**
4172 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4173 * @data: A pointer to the immediate command data portion of the IOCB.
4174 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4175 *
4176 * The routine copies the entire FCP command from @fcp_cmnd to @data while
4177 * byte swapping the data to big endian format for transmission on the wire.
4178 **/
4179 static void
4180 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4181 {
4182 int i, j;
4183 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4184 i += sizeof(uint32_t), j++) {
4185 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4186 }
4187 }
4188
4189 /**
4190 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4191 * @vport: The virtual port for which this call is being executed.
4192 * @lpfc_cmd: The scsi command which needs to send.
4193 * @pnode: Pointer to lpfc_nodelist.
4194 *
4195 * This routine initializes fcp_cmnd and iocb data structure from scsi command
4196 * to transfer for device with SLI3 interface spec.
4197 **/
4198 static void
4199 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4200 struct lpfc_nodelist *pnode)
4201 {
4202 struct lpfc_hba *phba = vport->phba;
4203 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4204 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4205 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4206 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4207 int datadir = scsi_cmnd->sc_data_direction;
4208 uint8_t *ptr;
4209 bool sli4;
4210 uint32_t fcpdl;
4211
4212 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4213 return;
4214
4215 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4216 /* clear task management bits */
4217 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4218
4219 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4220 &lpfc_cmd->fcp_cmnd->fcp_lun);
4221
4222 ptr = &fcp_cmnd->fcpCdb[0];
4223 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4224 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4225 ptr += scsi_cmnd->cmd_len;
4226 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4227 }
4228
4229 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4230
4231 sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4232 piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4233
4234 /*
4235 * There are three possibilities here - use scatter-gather segment, use
4236 * the single mapping, or neither. Start the lpfc command prep by
4237 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4238 * data bde entry.
4239 */
4240 if (scsi_sg_count(scsi_cmnd)) {
4241 if (datadir == DMA_TO_DEVICE) {
4242 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4243 iocb_cmd->ulpPU = PARM_READ_CHECK;
4244 if (vport->cfg_first_burst_size &&
4245 (pnode->nlp_flag & NLP_FIRSTBURST)) {
4246 fcpdl = scsi_bufflen(scsi_cmnd);
4247 if (fcpdl < vport->cfg_first_burst_size)
4248 piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4249 else
4250 piocbq->iocb.un.fcpi.fcpi_XRdy =
4251 vport->cfg_first_burst_size;
4252 }
4253 fcp_cmnd->fcpCntl3 = WRITE_DATA;
4254 atomic_inc(&phba->fc4ScsiOutputRequests);
4255 } else {
4256 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4257 iocb_cmd->ulpPU = PARM_READ_CHECK;
4258 fcp_cmnd->fcpCntl3 = READ_DATA;
4259 atomic_inc(&phba->fc4ScsiInputRequests);
4260 }
4261 } else {
4262 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4263 iocb_cmd->un.fcpi.fcpi_parm = 0;
4264 iocb_cmd->ulpPU = 0;
4265 fcp_cmnd->fcpCntl3 = 0;
4266 atomic_inc(&phba->fc4ScsiControlRequests);
4267 }
4268 if (phba->sli_rev == 3 &&
4269 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4270 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4271 /*
4272 * Finish initializing those IOCB fields that are independent
4273 * of the scsi_cmnd request_buffer
4274 */
4275 piocbq->iocb.ulpContext = pnode->nlp_rpi;
4276 if (sli4)
4277 piocbq->iocb.ulpContext =
4278 phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4279 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4280 piocbq->iocb.ulpFCP2Rcvy = 1;
4281 else
4282 piocbq->iocb.ulpFCP2Rcvy = 0;
4283
4284 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4285 piocbq->context1 = lpfc_cmd;
4286 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4287 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4288 piocbq->vport = vport;
4289 }
4290
4291 /**
4292 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4293 * @vport: The virtual port for which this call is being executed.
4294 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4295 * @lun: Logical unit number.
4296 * @task_mgmt_cmd: SCSI task management command.
4297 *
4298 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4299 * for device with SLI-3 interface spec.
4300 *
4301 * Return codes:
4302 * 0 - Error
4303 * 1 - Success
4304 **/
4305 static int
4306 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4307 struct lpfc_scsi_buf *lpfc_cmd,
4308 uint64_t lun,
4309 uint8_t task_mgmt_cmd)
4310 {
4311 struct lpfc_iocbq *piocbq;
4312 IOCB_t *piocb;
4313 struct fcp_cmnd *fcp_cmnd;
4314 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4315 struct lpfc_nodelist *ndlp = rdata->pnode;
4316
4317 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4318 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4319 return 0;
4320
4321 piocbq = &(lpfc_cmd->cur_iocbq);
4322 piocbq->vport = vport;
4323
4324 piocb = &piocbq->iocb;
4325
4326 fcp_cmnd = lpfc_cmd->fcp_cmnd;
4327 /* Clear out any old data in the FCP command area */
4328 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4329 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4330 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4331 if (vport->phba->sli_rev == 3 &&
4332 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4333 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4334 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4335 piocb->ulpContext = ndlp->nlp_rpi;
4336 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4337 piocb->ulpContext =
4338 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4339 }
4340 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4341 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4342 piocb->ulpPU = 0;
4343 piocb->un.fcpi.fcpi_parm = 0;
4344
4345 /* ulpTimeout is only one byte */
4346 if (lpfc_cmd->timeout > 0xff) {
4347 /*
4348 * Do not timeout the command at the firmware level.
4349 * The driver will provide the timeout mechanism.
4350 */
4351 piocb->ulpTimeout = 0;
4352 } else
4353 piocb->ulpTimeout = lpfc_cmd->timeout;
4354
4355 if (vport->phba->sli_rev == LPFC_SLI_REV4)
4356 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4357
4358 return 1;
4359 }
4360
4361 /**
4362 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4363 * @phba: The hba struct for which this call is being executed.
4364 * @dev_grp: The HBA PCI-Device group number.
4365 *
4366 * This routine sets up the SCSI interface API function jump table in @phba
4367 * struct.
4368 * Returns: 0 - success, -ENODEV - failure.
4369 **/
4370 int
4371 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4372 {
4373
4374 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4375 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4376
4377 switch (dev_grp) {
4378 case LPFC_PCI_DEV_LP:
4379 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4380 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4381 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4382 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4383 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4384 break;
4385 case LPFC_PCI_DEV_OC:
4386 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4387 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4388 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4389 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4390 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4391 break;
4392 default:
4393 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4394 "1418 Invalid HBA PCI-device group: 0x%x\n",
4395 dev_grp);
4396 return -ENODEV;
4397 break;
4398 }
4399 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4400 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4401 return 0;
4402 }
4403
4404 /**
4405 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4406 * @phba: The Hba for which this call is being executed.
4407 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4408 * @rspiocbq: Pointer to lpfc_iocbq data structure.
4409 *
4410 * This routine is IOCB completion routine for device reset and target reset
4411 * routine. This routine release scsi buffer associated with lpfc_cmd.
4412 **/
4413 static void
4414 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4415 struct lpfc_iocbq *cmdiocbq,
4416 struct lpfc_iocbq *rspiocbq)
4417 {
4418 struct lpfc_scsi_buf *lpfc_cmd =
4419 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4420 if (lpfc_cmd)
4421 lpfc_release_scsi_buf(phba, lpfc_cmd);
4422 return;
4423 }
4424
4425 /**
4426 * lpfc_info - Info entry point of scsi_host_template data structure
4427 * @host: The scsi host for which this call is being executed.
4428 *
4429 * This routine provides module information about hba.
4430 *
4431 * Reutrn code:
4432 * Pointer to char - Success.
4433 **/
4434 const char *
4435 lpfc_info(struct Scsi_Host *host)
4436 {
4437 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4438 struct lpfc_hba *phba = vport->phba;
4439 int len, link_speed = 0;
4440 static char lpfcinfobuf[384];
4441
4442 memset(lpfcinfobuf,0,384);
4443 if (phba && phba->pcidev){
4444 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4445 len = strlen(lpfcinfobuf);
4446 snprintf(lpfcinfobuf + len,
4447 384-len,
4448 " on PCI bus %02x device %02x irq %d",
4449 phba->pcidev->bus->number,
4450 phba->pcidev->devfn,
4451 phba->pcidev->irq);
4452 len = strlen(lpfcinfobuf);
4453 if (phba->Port[0]) {
4454 snprintf(lpfcinfobuf + len,
4455 384-len,
4456 " port %s",
4457 phba->Port);
4458 }
4459 len = strlen(lpfcinfobuf);
4460 link_speed = lpfc_sli_port_speed_get(phba);
4461 if (link_speed != 0)
4462 snprintf(lpfcinfobuf + len, 384-len,
4463 " Logical Link Speed: %d Mbps", link_speed);
4464 }
4465 return lpfcinfobuf;
4466 }
4467
4468 /**
4469 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4470 * @phba: The Hba for which this call is being executed.
4471 *
4472 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
4473 * The default value of cfg_poll_tmo is 10 milliseconds.
4474 **/
4475 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4476 {
4477 unsigned long poll_tmo_expires =
4478 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4479
4480 if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4481 mod_timer(&phba->fcp_poll_timer,
4482 poll_tmo_expires);
4483 }
4484
4485 /**
4486 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4487 * @phba: The Hba for which this call is being executed.
4488 *
4489 * This routine starts the fcp_poll_timer of @phba.
4490 **/
4491 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4492 {
4493 lpfc_poll_rearm_timer(phba);
4494 }
4495
4496 /**
4497 * lpfc_poll_timeout - Restart polling timer
4498 * @ptr: Map to lpfc_hba data structure pointer.
4499 *
4500 * This routine restarts fcp_poll timer, when FCP ring polling is enable
4501 * and FCP Ring interrupt is disable.
4502 **/
4503
4504 void lpfc_poll_timeout(struct timer_list *t)
4505 {
4506 struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4507
4508 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4509 lpfc_sli_handle_fast_ring_event(phba,
4510 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4511
4512 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4513 lpfc_poll_rearm_timer(phba);
4514 }
4515 }
4516
4517 /**
4518 * lpfc_queuecommand - scsi_host_template queuecommand entry point
4519 * @cmnd: Pointer to scsi_cmnd data structure.
4520 * @done: Pointer to done routine.
4521 *
4522 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4523 * This routine prepares an IOCB from scsi command and provides to firmware.
4524 * The @done callback is invoked after driver finished processing the command.
4525 *
4526 * Return value :
4527 * 0 - Success
4528 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4529 **/
4530 static int
4531 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4532 {
4533 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4534 struct lpfc_hba *phba = vport->phba;
4535 struct lpfc_rport_data *rdata;
4536 struct lpfc_nodelist *ndlp;
4537 struct lpfc_scsi_buf *lpfc_cmd;
4538 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4539 int err;
4540
4541 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4542 err = fc_remote_port_chkready(rport);
4543 if (err) {
4544 cmnd->result = err;
4545 goto out_fail_command;
4546 }
4547 ndlp = rdata->pnode;
4548
4549 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4550 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4551
4552 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4553 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4554 " op:%02x str=%s without registering for"
4555 " BlockGuard - Rejecting command\n",
4556 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4557 dif_op_str[scsi_get_prot_op(cmnd)]);
4558 goto out_fail_command;
4559 }
4560
4561 /*
4562 * Catch race where our node has transitioned, but the
4563 * transport is still transitioning.
4564 */
4565 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4566 goto out_tgt_busy;
4567 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4568 goto out_tgt_busy;
4569
4570 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4571 if (lpfc_cmd == NULL) {
4572 lpfc_rampdown_queue_depth(phba);
4573
4574 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4575 "0707 driver's buffer pool is empty, "
4576 "IO busied\n");
4577 goto out_host_busy;
4578 }
4579
4580 /*
4581 * Store the midlayer's command structure for the completion phase
4582 * and complete the command initialization.
4583 */
4584 lpfc_cmd->pCmd = cmnd;
4585 lpfc_cmd->rdata = rdata;
4586 lpfc_cmd->timeout = 0;
4587 lpfc_cmd->start_time = jiffies;
4588 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4589
4590 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4591 if (vport->phba->cfg_enable_bg) {
4592 lpfc_printf_vlog(vport,
4593 KERN_INFO, LOG_SCSI_CMD,
4594 "9033 BLKGRD: rcvd %s cmd:x%x "
4595 "sector x%llx cnt %u pt %x\n",
4596 dif_op_str[scsi_get_prot_op(cmnd)],
4597 cmnd->cmnd[0],
4598 (unsigned long long)scsi_get_lba(cmnd),
4599 blk_rq_sectors(cmnd->request),
4600 (cmnd->cmnd[1]>>5));
4601 }
4602 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4603 } else {
4604 if (vport->phba->cfg_enable_bg) {
4605 lpfc_printf_vlog(vport,
4606 KERN_INFO, LOG_SCSI_CMD,
4607 "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4608 "x%x sector x%llx cnt %u pt %x\n",
4609 cmnd->cmnd[0],
4610 (unsigned long long)scsi_get_lba(cmnd),
4611 blk_rq_sectors(cmnd->request),
4612 (cmnd->cmnd[1]>>5));
4613 }
4614 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4615 }
4616
4617 if (err)
4618 goto out_host_busy_free_buf;
4619
4620 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4621
4622 atomic_inc(&ndlp->cmd_pending);
4623 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4624 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4625 if (err) {
4626 atomic_dec(&ndlp->cmd_pending);
4627 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4628 "3376 FCP could not issue IOCB err %x"
4629 "FCP cmd x%x <%d/%llu> "
4630 "sid: x%x did: x%x oxid: x%x "
4631 "Data: x%x x%x x%x x%x\n",
4632 err, cmnd->cmnd[0],
4633 cmnd->device ? cmnd->device->id : 0xffff,
4634 cmnd->device ? cmnd->device->lun : (u64) -1,
4635 vport->fc_myDID, ndlp->nlp_DID,
4636 phba->sli_rev == LPFC_SLI_REV4 ?
4637 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4638 lpfc_cmd->cur_iocbq.iocb.ulpContext,
4639 lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4640 lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4641 (uint32_t)
4642 (cmnd->request->timeout / 1000));
4643
4644 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
4645 case WRITE_DATA:
4646 atomic_dec(&phba->fc4ScsiOutputRequests);
4647 break;
4648 case READ_DATA:
4649 atomic_dec(&phba->fc4ScsiInputRequests);
4650 break;
4651 default:
4652 atomic_dec(&phba->fc4ScsiControlRequests);
4653 }
4654 goto out_host_busy_free_buf;
4655 }
4656 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4657 lpfc_sli_handle_fast_ring_event(phba,
4658 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4659
4660 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4661 lpfc_poll_rearm_timer(phba);
4662 }
4663
4664 return 0;
4665
4666 out_host_busy_free_buf:
4667 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4668 lpfc_release_scsi_buf(phba, lpfc_cmd);
4669 out_host_busy:
4670 return SCSI_MLQUEUE_HOST_BUSY;
4671
4672 out_tgt_busy:
4673 return SCSI_MLQUEUE_TARGET_BUSY;
4674
4675 out_fail_command:
4676 cmnd->scsi_done(cmnd);
4677 return 0;
4678 }
4679
4680
4681 /**
4682 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4683 * @cmnd: Pointer to scsi_cmnd data structure.
4684 *
4685 * This routine aborts @cmnd pending in base driver.
4686 *
4687 * Return code :
4688 * 0x2003 - Error
4689 * 0x2002 - Success
4690 **/
4691 static int
4692 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4693 {
4694 struct Scsi_Host *shost = cmnd->device->host;
4695 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4696 struct lpfc_hba *phba = vport->phba;
4697 struct lpfc_iocbq *iocb;
4698 struct lpfc_iocbq *abtsiocb;
4699 struct lpfc_scsi_buf *lpfc_cmd;
4700 IOCB_t *cmd, *icmd;
4701 int ret = SUCCESS, status = 0;
4702 struct lpfc_sli_ring *pring_s4;
4703 int ret_val;
4704 unsigned long flags, iflags;
4705 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4706
4707 status = fc_block_scsi_eh(cmnd);
4708 if (status != 0 && status != SUCCESS)
4709 return status;
4710
4711 spin_lock_irqsave(&phba->hbalock, flags);
4712 /* driver queued commands are in process of being flushed */
4713 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4714 spin_unlock_irqrestore(&phba->hbalock, flags);
4715 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4716 "3168 SCSI Layer abort requested I/O has been "
4717 "flushed by LLD.\n");
4718 return FAILED;
4719 }
4720
4721 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4722 if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4723 spin_unlock_irqrestore(&phba->hbalock, flags);
4724 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4725 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4726 "x%x ID %d LUN %llu\n",
4727 SUCCESS, cmnd->device->id, cmnd->device->lun);
4728 return SUCCESS;
4729 }
4730
4731 iocb = &lpfc_cmd->cur_iocbq;
4732 /* the command is in process of being cancelled */
4733 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4734 spin_unlock_irqrestore(&phba->hbalock, flags);
4735 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4736 "3169 SCSI Layer abort requested I/O has been "
4737 "cancelled by LLD.\n");
4738 return FAILED;
4739 }
4740 /*
4741 * If pCmd field of the corresponding lpfc_scsi_buf structure
4742 * points to a different SCSI command, then the driver has
4743 * already completed this command, but the midlayer did not
4744 * see the completion before the eh fired. Just return SUCCESS.
4745 */
4746 if (lpfc_cmd->pCmd != cmnd) {
4747 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4748 "3170 SCSI Layer abort requested I/O has been "
4749 "completed by LLD.\n");
4750 goto out_unlock;
4751 }
4752
4753 BUG_ON(iocb->context1 != lpfc_cmd);
4754
4755 /* abort issued in recovery is still in progress */
4756 if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4757 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4758 "3389 SCSI Layer I/O Abort Request is pending\n");
4759 spin_unlock_irqrestore(&phba->hbalock, flags);
4760 goto wait_for_cmpl;
4761 }
4762
4763 abtsiocb = __lpfc_sli_get_iocbq(phba);
4764 if (abtsiocb == NULL) {
4765 ret = FAILED;
4766 goto out_unlock;
4767 }
4768
4769 /* Indicate the IO is being aborted by the driver. */
4770 iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4771
4772 /*
4773 * The scsi command can not be in txq and it is in flight because the
4774 * pCmd is still pointig at the SCSI command we have to abort. There
4775 * is no need to search the txcmplq. Just send an abort to the FW.
4776 */
4777
4778 cmd = &iocb->iocb;
4779 icmd = &abtsiocb->iocb;
4780 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4781 icmd->un.acxri.abortContextTag = cmd->ulpContext;
4782 if (phba->sli_rev == LPFC_SLI_REV4)
4783 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4784 else
4785 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4786
4787 icmd->ulpLe = 1;
4788 icmd->ulpClass = cmd->ulpClass;
4789
4790 /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4791 abtsiocb->hba_wqidx = iocb->hba_wqidx;
4792 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4793 if (iocb->iocb_flag & LPFC_IO_FOF)
4794 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4795
4796 if (lpfc_is_link_up(phba))
4797 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4798 else
4799 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4800
4801 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4802 abtsiocb->vport = vport;
4803 if (phba->sli_rev == LPFC_SLI_REV4) {
4804 pring_s4 = lpfc_sli4_calc_ring(phba, iocb);
4805 if (pring_s4 == NULL) {
4806 ret = FAILED;
4807 goto out_unlock;
4808 }
4809 /* Note: both hbalock and ring_lock must be set here */
4810 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4811 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4812 abtsiocb, 0);
4813 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4814 } else {
4815 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4816 abtsiocb, 0);
4817 }
4818 /* no longer need the lock after this point */
4819 spin_unlock_irqrestore(&phba->hbalock, flags);
4820
4821
4822 if (ret_val == IOCB_ERROR) {
4823 lpfc_sli_release_iocbq(phba, abtsiocb);
4824 ret = FAILED;
4825 goto out;
4826 }
4827
4828 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4829 lpfc_sli_handle_fast_ring_event(phba,
4830 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4831
4832 wait_for_cmpl:
4833 lpfc_cmd->waitq = &waitq;
4834 /* Wait for abort to complete */
4835 wait_event_timeout(waitq,
4836 (lpfc_cmd->pCmd != cmnd),
4837 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4838
4839 spin_lock_irqsave(shost->host_lock, flags);
4840 lpfc_cmd->waitq = NULL;
4841 spin_unlock_irqrestore(shost->host_lock, flags);
4842
4843 if (lpfc_cmd->pCmd == cmnd) {
4844 ret = FAILED;
4845 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4846 "0748 abort handler timed out waiting "
4847 "for aborting I/O (xri:x%x) to complete: "
4848 "ret %#x, ID %d, LUN %llu\n",
4849 iocb->sli4_xritag, ret,
4850 cmnd->device->id, cmnd->device->lun);
4851 }
4852 goto out;
4853
4854 out_unlock:
4855 spin_unlock_irqrestore(&phba->hbalock, flags);
4856 out:
4857 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4858 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4859 "LUN %llu\n", ret, cmnd->device->id,
4860 cmnd->device->lun);
4861 return ret;
4862 }
4863
4864 static char *
4865 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4866 {
4867 switch (task_mgmt_cmd) {
4868 case FCP_ABORT_TASK_SET:
4869 return "ABORT_TASK_SET";
4870 case FCP_CLEAR_TASK_SET:
4871 return "FCP_CLEAR_TASK_SET";
4872 case FCP_BUS_RESET:
4873 return "FCP_BUS_RESET";
4874 case FCP_LUN_RESET:
4875 return "FCP_LUN_RESET";
4876 case FCP_TARGET_RESET:
4877 return "FCP_TARGET_RESET";
4878 case FCP_CLEAR_ACA:
4879 return "FCP_CLEAR_ACA";
4880 case FCP_TERMINATE_TASK:
4881 return "FCP_TERMINATE_TASK";
4882 default:
4883 return "unknown";
4884 }
4885 }
4886
4887
4888 /**
4889 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4890 * @vport: The virtual port for which this call is being executed.
4891 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4892 *
4893 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4894 *
4895 * Return code :
4896 * 0x2003 - Error
4897 * 0x2002 - Success
4898 **/
4899 static int
4900 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4901 {
4902 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4903 uint32_t rsp_info;
4904 uint32_t rsp_len;
4905 uint8_t rsp_info_code;
4906 int ret = FAILED;
4907
4908
4909 if (fcprsp == NULL)
4910 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4911 "0703 fcp_rsp is missing\n");
4912 else {
4913 rsp_info = fcprsp->rspStatus2;
4914 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4915 rsp_info_code = fcprsp->rspInfo3;
4916
4917
4918 lpfc_printf_vlog(vport, KERN_INFO,
4919 LOG_FCP,
4920 "0706 fcp_rsp valid 0x%x,"
4921 " rsp len=%d code 0x%x\n",
4922 rsp_info,
4923 rsp_len, rsp_info_code);
4924
4925 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
4926 switch (rsp_info_code) {
4927 case RSP_NO_FAILURE:
4928 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4929 "0715 Task Mgmt No Failure\n");
4930 ret = SUCCESS;
4931 break;
4932 case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4933 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4934 "0716 Task Mgmt Target "
4935 "reject\n");
4936 break;
4937 case RSP_TM_NOT_COMPLETED: /* TM failed */
4938 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4939 "0717 Task Mgmt Target "
4940 "failed TM\n");
4941 break;
4942 case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4943 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4944 "0718 Task Mgmt to invalid "
4945 "LUN\n");
4946 break;
4947 }
4948 }
4949 }
4950 return ret;
4951 }
4952
4953
4954 /**
4955 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
4956 * @vport: The virtual port for which this call is being executed.
4957 * @rdata: Pointer to remote port local data
4958 * @tgt_id: Target ID of remote device.
4959 * @lun_id: Lun number for the TMF
4960 * @task_mgmt_cmd: type of TMF to send
4961 *
4962 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
4963 * a remote port.
4964 *
4965 * Return Code:
4966 * 0x2003 - Error
4967 * 0x2002 - Success.
4968 **/
4969 static int
4970 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
4971 unsigned int tgt_id, uint64_t lun_id,
4972 uint8_t task_mgmt_cmd)
4973 {
4974 struct lpfc_hba *phba = vport->phba;
4975 struct lpfc_scsi_buf *lpfc_cmd;
4976 struct lpfc_iocbq *iocbq;
4977 struct lpfc_iocbq *iocbqrsp;
4978 struct lpfc_rport_data *rdata;
4979 struct lpfc_nodelist *pnode;
4980 int ret;
4981 int status;
4982
4983 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4984 if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
4985 return FAILED;
4986 pnode = rdata->pnode;
4987
4988 lpfc_cmd = lpfc_get_scsi_buf(phba, pnode);
4989 if (lpfc_cmd == NULL)
4990 return FAILED;
4991 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
4992 lpfc_cmd->rdata = rdata;
4993 lpfc_cmd->pCmd = cmnd;
4994
4995 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
4996 task_mgmt_cmd);
4997 if (!status) {
4998 lpfc_release_scsi_buf(phba, lpfc_cmd);
4999 return FAILED;
5000 }
5001
5002 iocbq = &lpfc_cmd->cur_iocbq;
5003 iocbqrsp = lpfc_sli_get_iocbq(phba);
5004 if (iocbqrsp == NULL) {
5005 lpfc_release_scsi_buf(phba, lpfc_cmd);
5006 return FAILED;
5007 }
5008 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5009
5010 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5011 "0702 Issue %s to TGT %d LUN %llu "
5012 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5013 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5014 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5015 iocbq->iocb_flag);
5016
5017 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5018 iocbq, iocbqrsp, lpfc_cmd->timeout);
5019 if ((status != IOCB_SUCCESS) ||
5020 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5021 if (status != IOCB_SUCCESS ||
5022 iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5023 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5024 "0727 TMF %s to TGT %d LUN %llu "
5025 "failed (%d, %d) iocb_flag x%x\n",
5026 lpfc_taskmgmt_name(task_mgmt_cmd),
5027 tgt_id, lun_id,
5028 iocbqrsp->iocb.ulpStatus,
5029 iocbqrsp->iocb.un.ulpWord[4],
5030 iocbq->iocb_flag);
5031 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5032 if (status == IOCB_SUCCESS) {
5033 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5034 /* Something in the FCP_RSP was invalid.
5035 * Check conditions */
5036 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5037 else
5038 ret = FAILED;
5039 } else if (status == IOCB_TIMEDOUT) {
5040 ret = TIMEOUT_ERROR;
5041 } else {
5042 ret = FAILED;
5043 }
5044 } else
5045 ret = SUCCESS;
5046
5047 lpfc_sli_release_iocbq(phba, iocbqrsp);
5048
5049 if (ret != TIMEOUT_ERROR)
5050 lpfc_release_scsi_buf(phba, lpfc_cmd);
5051
5052 return ret;
5053 }
5054
5055 /**
5056 * lpfc_chk_tgt_mapped -
5057 * @vport: The virtual port to check on
5058 * @cmnd: Pointer to scsi_cmnd data structure.
5059 *
5060 * This routine delays until the scsi target (aka rport) for the
5061 * command exists (is present and logged in) or we declare it non-existent.
5062 *
5063 * Return code :
5064 * 0x2003 - Error
5065 * 0x2002 - Success
5066 **/
5067 static int
5068 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5069 {
5070 struct lpfc_rport_data *rdata;
5071 struct lpfc_nodelist *pnode;
5072 unsigned long later;
5073
5074 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5075 if (!rdata) {
5076 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5077 "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5078 return FAILED;
5079 }
5080 pnode = rdata->pnode;
5081 /*
5082 * If target is not in a MAPPED state, delay until
5083 * target is rediscovered or devloss timeout expires.
5084 */
5085 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5086 while (time_after(later, jiffies)) {
5087 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5088 return FAILED;
5089 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5090 return SUCCESS;
5091 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5092 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5093 if (!rdata)
5094 return FAILED;
5095 pnode = rdata->pnode;
5096 }
5097 if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5098 (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5099 return FAILED;
5100 return SUCCESS;
5101 }
5102
5103 /**
5104 * lpfc_reset_flush_io_context -
5105 * @vport: The virtual port (scsi_host) for the flush context
5106 * @tgt_id: If aborting by Target contect - specifies the target id
5107 * @lun_id: If aborting by Lun context - specifies the lun id
5108 * @context: specifies the context level to flush at.
5109 *
5110 * After a reset condition via TMF, we need to flush orphaned i/o
5111 * contexts from the adapter. This routine aborts any contexts
5112 * outstanding, then waits for their completions. The wait is
5113 * bounded by devloss_tmo though.
5114 *
5115 * Return code :
5116 * 0x2003 - Error
5117 * 0x2002 - Success
5118 **/
5119 static int
5120 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5121 uint64_t lun_id, lpfc_ctx_cmd context)
5122 {
5123 struct lpfc_hba *phba = vport->phba;
5124 unsigned long later;
5125 int cnt;
5126
5127 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5128 if (cnt)
5129 lpfc_sli_abort_taskmgmt(vport,
5130 &phba->sli.sli3_ring[LPFC_FCP_RING],
5131 tgt_id, lun_id, context);
5132 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5133 while (time_after(later, jiffies) && cnt) {
5134 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5135 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5136 }
5137 if (cnt) {
5138 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5139 "0724 I/O flush failure for context %s : cnt x%x\n",
5140 ((context == LPFC_CTX_LUN) ? "LUN" :
5141 ((context == LPFC_CTX_TGT) ? "TGT" :
5142 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5143 cnt);
5144 return FAILED;
5145 }
5146 return SUCCESS;
5147 }
5148
5149 /**
5150 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5151 * @cmnd: Pointer to scsi_cmnd data structure.
5152 *
5153 * This routine does a device reset by sending a LUN_RESET task management
5154 * command.
5155 *
5156 * Return code :
5157 * 0x2003 - Error
5158 * 0x2002 - Success
5159 **/
5160 static int
5161 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5162 {
5163 struct Scsi_Host *shost = cmnd->device->host;
5164 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5165 struct lpfc_rport_data *rdata;
5166 struct lpfc_nodelist *pnode;
5167 unsigned tgt_id = cmnd->device->id;
5168 uint64_t lun_id = cmnd->device->lun;
5169 struct lpfc_scsi_event_header scsi_event;
5170 int status;
5171
5172 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5173 if (!rdata || !rdata->pnode) {
5174 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5175 "0798 Device Reset rport failure: rdata x%p\n",
5176 rdata);
5177 return FAILED;
5178 }
5179 pnode = rdata->pnode;
5180 status = fc_block_scsi_eh(cmnd);
5181 if (status != 0 && status != SUCCESS)
5182 return status;
5183
5184 status = lpfc_chk_tgt_mapped(vport, cmnd);
5185 if (status == FAILED) {
5186 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5187 "0721 Device Reset rport failure: rdata x%p\n", rdata);
5188 return FAILED;
5189 }
5190
5191 scsi_event.event_type = FC_REG_SCSI_EVENT;
5192 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5193 scsi_event.lun = lun_id;
5194 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5195 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5196
5197 fc_host_post_vendor_event(shost, fc_get_event_number(),
5198 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5199
5200 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5201 FCP_LUN_RESET);
5202
5203 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5204 "0713 SCSI layer issued Device Reset (%d, %llu) "
5205 "return x%x\n", tgt_id, lun_id, status);
5206
5207 /*
5208 * We have to clean up i/o as : they may be orphaned by the TMF;
5209 * or if the TMF failed, they may be in an indeterminate state.
5210 * So, continue on.
5211 * We will report success if all the i/o aborts successfully.
5212 */
5213 if (status == SUCCESS)
5214 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5215 LPFC_CTX_LUN);
5216
5217 return status;
5218 }
5219
5220 /**
5221 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5222 * @cmnd: Pointer to scsi_cmnd data structure.
5223 *
5224 * This routine does a target reset by sending a TARGET_RESET task management
5225 * command.
5226 *
5227 * Return code :
5228 * 0x2003 - Error
5229 * 0x2002 - Success
5230 **/
5231 static int
5232 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5233 {
5234 struct Scsi_Host *shost = cmnd->device->host;
5235 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5236 struct lpfc_rport_data *rdata;
5237 struct lpfc_nodelist *pnode;
5238 unsigned tgt_id = cmnd->device->id;
5239 uint64_t lun_id = cmnd->device->lun;
5240 struct lpfc_scsi_event_header scsi_event;
5241 int status;
5242
5243 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5244 if (!rdata) {
5245 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5246 "0799 Target Reset rport failure: rdata x%p\n", rdata);
5247 return FAILED;
5248 }
5249 pnode = rdata->pnode;
5250 status = fc_block_scsi_eh(cmnd);
5251 if (status != 0 && status != SUCCESS)
5252 return status;
5253
5254 status = lpfc_chk_tgt_mapped(vport, cmnd);
5255 if (status == FAILED) {
5256 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5257 "0722 Target Reset rport failure: rdata x%p\n", rdata);
5258 if (pnode) {
5259 spin_lock_irq(shost->host_lock);
5260 pnode->nlp_flag &= ~NLP_NPR_ADISC;
5261 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5262 spin_unlock_irq(shost->host_lock);
5263 }
5264 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5265 LPFC_CTX_TGT);
5266 return FAST_IO_FAIL;
5267 }
5268
5269 scsi_event.event_type = FC_REG_SCSI_EVENT;
5270 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5271 scsi_event.lun = 0;
5272 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5273 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5274
5275 fc_host_post_vendor_event(shost, fc_get_event_number(),
5276 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5277
5278 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5279 FCP_TARGET_RESET);
5280
5281 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5282 "0723 SCSI layer issued Target Reset (%d, %llu) "
5283 "return x%x\n", tgt_id, lun_id, status);
5284
5285 /*
5286 * We have to clean up i/o as : they may be orphaned by the TMF;
5287 * or if the TMF failed, they may be in an indeterminate state.
5288 * So, continue on.
5289 * We will report success if all the i/o aborts successfully.
5290 */
5291 if (status == SUCCESS)
5292 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5293 LPFC_CTX_TGT);
5294 return status;
5295 }
5296
5297 /**
5298 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5299 * @cmnd: Pointer to scsi_cmnd data structure.
5300 *
5301 * This routine does target reset to all targets on @cmnd->device->host.
5302 * This emulates Parallel SCSI Bus Reset Semantics.
5303 *
5304 * Return code :
5305 * 0x2003 - Error
5306 * 0x2002 - Success
5307 **/
5308 static int
5309 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5310 {
5311 struct Scsi_Host *shost = cmnd->device->host;
5312 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5313 struct lpfc_nodelist *ndlp = NULL;
5314 struct lpfc_scsi_event_header scsi_event;
5315 int match;
5316 int ret = SUCCESS, status, i;
5317
5318 scsi_event.event_type = FC_REG_SCSI_EVENT;
5319 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5320 scsi_event.lun = 0;
5321 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5322 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5323
5324 fc_host_post_vendor_event(shost, fc_get_event_number(),
5325 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5326
5327 status = fc_block_scsi_eh(cmnd);
5328 if (status != 0 && status != SUCCESS)
5329 return status;
5330
5331 /*
5332 * Since the driver manages a single bus device, reset all
5333 * targets known to the driver. Should any target reset
5334 * fail, this routine returns failure to the midlayer.
5335 */
5336 for (i = 0; i < LPFC_MAX_TARGET; i++) {
5337 /* Search for mapped node by target ID */
5338 match = 0;
5339 spin_lock_irq(shost->host_lock);
5340 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5341 if (!NLP_CHK_NODE_ACT(ndlp))
5342 continue;
5343 if (vport->phba->cfg_fcp2_no_tgt_reset &&
5344 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5345 continue;
5346 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5347 ndlp->nlp_sid == i &&
5348 ndlp->rport &&
5349 ndlp->nlp_type & NLP_FCP_TARGET) {
5350 match = 1;
5351 break;
5352 }
5353 }
5354 spin_unlock_irq(shost->host_lock);
5355 if (!match)
5356 continue;
5357
5358 status = lpfc_send_taskmgmt(vport, cmnd,
5359 i, 0, FCP_TARGET_RESET);
5360
5361 if (status != SUCCESS) {
5362 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5363 "0700 Bus Reset on target %d failed\n",
5364 i);
5365 ret = FAILED;
5366 }
5367 }
5368 /*
5369 * We have to clean up i/o as : they may be orphaned by the TMFs
5370 * above; or if any of the TMFs failed, they may be in an
5371 * indeterminate state.
5372 * We will report success if all the i/o aborts successfully.
5373 */
5374
5375 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5376 if (status != SUCCESS)
5377 ret = FAILED;
5378
5379 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5380 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5381 return ret;
5382 }
5383
5384 /**
5385 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5386 * @cmnd: Pointer to scsi_cmnd data structure.
5387 *
5388 * This routine does host reset to the adaptor port. It brings the HBA
5389 * offline, performs a board restart, and then brings the board back online.
5390 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5391 * reject all outstanding SCSI commands to the host and error returned
5392 * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5393 * of error handling, it will only return error if resetting of the adapter
5394 * is not successful; in all other cases, will return success.
5395 *
5396 * Return code :
5397 * 0x2003 - Error
5398 * 0x2002 - Success
5399 **/
5400 static int
5401 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5402 {
5403 struct Scsi_Host *shost = cmnd->device->host;
5404 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5405 struct lpfc_hba *phba = vport->phba;
5406 int rc, ret = SUCCESS;
5407
5408 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5409 "3172 SCSI layer issued Host Reset Data:\n");
5410
5411 lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5412 lpfc_offline(phba);
5413 rc = lpfc_sli_brdrestart(phba);
5414 if (rc)
5415 ret = FAILED;
5416 rc = lpfc_online(phba);
5417 if (rc)
5418 ret = FAILED;
5419 lpfc_unblock_mgmt_io(phba);
5420
5421 if (ret == FAILED) {
5422 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5423 "3323 Failed host reset, bring it offline\n");
5424 lpfc_sli4_offline_eratt(phba);
5425 }
5426 return ret;
5427 }
5428
5429 /**
5430 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5431 * @sdev: Pointer to scsi_device.
5432 *
5433 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
5434 * globally available list of scsi buffers. This routine also makes sure scsi
5435 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5436 * of scsi buffer exists for the lifetime of the driver.
5437 *
5438 * Return codes:
5439 * non-0 - Error
5440 * 0 - Success
5441 **/
5442 static int
5443 lpfc_slave_alloc(struct scsi_device *sdev)
5444 {
5445 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5446 struct lpfc_hba *phba = vport->phba;
5447 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5448 uint32_t total = 0;
5449 uint32_t num_to_alloc = 0;
5450 int num_allocated = 0;
5451 uint32_t sdev_cnt;
5452 struct lpfc_device_data *device_data;
5453 unsigned long flags;
5454 struct lpfc_name target_wwpn;
5455
5456 if (!rport || fc_remote_port_chkready(rport))
5457 return -ENXIO;
5458
5459 if (phba->cfg_fof) {
5460
5461 /*
5462 * Check to see if the device data structure for the lun
5463 * exists. If not, create one.
5464 */
5465
5466 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5467 spin_lock_irqsave(&phba->devicelock, flags);
5468 device_data = __lpfc_get_device_data(phba,
5469 &phba->luns,
5470 &vport->fc_portname,
5471 &target_wwpn,
5472 sdev->lun);
5473 if (!device_data) {
5474 spin_unlock_irqrestore(&phba->devicelock, flags);
5475 device_data = lpfc_create_device_data(phba,
5476 &vport->fc_portname,
5477 &target_wwpn,
5478 sdev->lun,
5479 phba->cfg_XLanePriority,
5480 true);
5481 if (!device_data)
5482 return -ENOMEM;
5483 spin_lock_irqsave(&phba->devicelock, flags);
5484 list_add_tail(&device_data->listentry, &phba->luns);
5485 }
5486 device_data->rport_data = rport->dd_data;
5487 device_data->available = true;
5488 spin_unlock_irqrestore(&phba->devicelock, flags);
5489 sdev->hostdata = device_data;
5490 } else {
5491 sdev->hostdata = rport->dd_data;
5492 }
5493 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5494
5495 /*
5496 * Populate the cmds_per_lun count scsi_bufs into this host's globally
5497 * available list of scsi buffers. Don't allocate more than the
5498 * HBA limit conveyed to the midlayer via the host structure. The
5499 * formula accounts for the lun_queue_depth + error handlers + 1
5500 * extra. This list of scsi bufs exists for the lifetime of the driver.
5501 */
5502 total = phba->total_scsi_bufs;
5503 num_to_alloc = vport->cfg_lun_queue_depth + 2;
5504
5505 /* If allocated buffers are enough do nothing */
5506 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5507 return 0;
5508
5509 /* Allow some exchanges to be available always to complete discovery */
5510 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5511 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5512 "0704 At limitation of %d preallocated "
5513 "command buffers\n", total);
5514 return 0;
5515 /* Allow some exchanges to be available always to complete discovery */
5516 } else if (total + num_to_alloc >
5517 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5518 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5519 "0705 Allocation request of %d "
5520 "command buffers will exceed max of %d. "
5521 "Reducing allocation request to %d.\n",
5522 num_to_alloc, phba->cfg_hba_queue_depth,
5523 (phba->cfg_hba_queue_depth - total));
5524 num_to_alloc = phba->cfg_hba_queue_depth - total;
5525 }
5526 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5527 if (num_to_alloc != num_allocated) {
5528 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5529 "0708 Allocation request of %d "
5530 "command buffers did not succeed. "
5531 "Allocated %d buffers.\n",
5532 num_to_alloc, num_allocated);
5533 }
5534 if (num_allocated > 0)
5535 phba->total_scsi_bufs += num_allocated;
5536 return 0;
5537 }
5538
5539 /**
5540 * lpfc_slave_configure - scsi_host_template slave_configure entry point
5541 * @sdev: Pointer to scsi_device.
5542 *
5543 * This routine configures following items
5544 * - Tag command queuing support for @sdev if supported.
5545 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5546 *
5547 * Return codes:
5548 * 0 - Success
5549 **/
5550 static int
5551 lpfc_slave_configure(struct scsi_device *sdev)
5552 {
5553 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5554 struct lpfc_hba *phba = vport->phba;
5555
5556 scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5557
5558 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5559 lpfc_sli_handle_fast_ring_event(phba,
5560 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5561 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5562 lpfc_poll_rearm_timer(phba);
5563 }
5564
5565 return 0;
5566 }
5567
5568 /**
5569 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5570 * @sdev: Pointer to scsi_device.
5571 *
5572 * This routine sets @sdev hostatdata filed to null.
5573 **/
5574 static void
5575 lpfc_slave_destroy(struct scsi_device *sdev)
5576 {
5577 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5578 struct lpfc_hba *phba = vport->phba;
5579 unsigned long flags;
5580 struct lpfc_device_data *device_data = sdev->hostdata;
5581
5582 atomic_dec(&phba->sdev_cnt);
5583 if ((phba->cfg_fof) && (device_data)) {
5584 spin_lock_irqsave(&phba->devicelock, flags);
5585 device_data->available = false;
5586 if (!device_data->oas_enabled)
5587 lpfc_delete_device_data(phba, device_data);
5588 spin_unlock_irqrestore(&phba->devicelock, flags);
5589 }
5590 sdev->hostdata = NULL;
5591 return;
5592 }
5593
5594 /**
5595 * lpfc_create_device_data - creates and initializes device data structure for OAS
5596 * @pha: Pointer to host bus adapter structure.
5597 * @vport_wwpn: Pointer to vport's wwpn information
5598 * @target_wwpn: Pointer to target's wwpn information
5599 * @lun: Lun on target
5600 * @atomic_create: Flag to indicate if memory should be allocated using the
5601 * GFP_ATOMIC flag or not.
5602 *
5603 * This routine creates a device data structure which will contain identifying
5604 * information for the device (host wwpn, target wwpn, lun), state of OAS,
5605 * whether or not the corresponding lun is available by the system,
5606 * and pointer to the rport data.
5607 *
5608 * Return codes:
5609 * NULL - Error
5610 * Pointer to lpfc_device_data - Success
5611 **/
5612 struct lpfc_device_data*
5613 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5614 struct lpfc_name *target_wwpn, uint64_t lun,
5615 uint32_t pri, bool atomic_create)
5616 {
5617
5618 struct lpfc_device_data *lun_info;
5619 int memory_flags;
5620
5621 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5622 !(phba->cfg_fof))
5623 return NULL;
5624
5625 /* Attempt to create the device data to contain lun info */
5626
5627 if (atomic_create)
5628 memory_flags = GFP_ATOMIC;
5629 else
5630 memory_flags = GFP_KERNEL;
5631 lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5632 if (!lun_info)
5633 return NULL;
5634 INIT_LIST_HEAD(&lun_info->listentry);
5635 lun_info->rport_data = NULL;
5636 memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5637 sizeof(struct lpfc_name));
5638 memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5639 sizeof(struct lpfc_name));
5640 lun_info->device_id.lun = lun;
5641 lun_info->oas_enabled = false;
5642 lun_info->priority = pri;
5643 lun_info->available = false;
5644 return lun_info;
5645 }
5646
5647 /**
5648 * lpfc_delete_device_data - frees a device data structure for OAS
5649 * @pha: Pointer to host bus adapter structure.
5650 * @lun_info: Pointer to device data structure to free.
5651 *
5652 * This routine frees the previously allocated device data structure passed.
5653 *
5654 **/
5655 void
5656 lpfc_delete_device_data(struct lpfc_hba *phba,
5657 struct lpfc_device_data *lun_info)
5658 {
5659
5660 if (unlikely(!phba) || !lun_info ||
5661 !(phba->cfg_fof))
5662 return;
5663
5664 if (!list_empty(&lun_info->listentry))
5665 list_del(&lun_info->listentry);
5666 mempool_free(lun_info, phba->device_data_mem_pool);
5667 return;
5668 }
5669
5670 /**
5671 * __lpfc_get_device_data - returns the device data for the specified lun
5672 * @pha: Pointer to host bus adapter structure.
5673 * @list: Point to list to search.
5674 * @vport_wwpn: Pointer to vport's wwpn information
5675 * @target_wwpn: Pointer to target's wwpn information
5676 * @lun: Lun on target
5677 *
5678 * This routine searches the list passed for the specified lun's device data.
5679 * This function does not hold locks, it is the responsibility of the caller
5680 * to ensure the proper lock is held before calling the function.
5681 *
5682 * Return codes:
5683 * NULL - Error
5684 * Pointer to lpfc_device_data - Success
5685 **/
5686 struct lpfc_device_data*
5687 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5688 struct lpfc_name *vport_wwpn,
5689 struct lpfc_name *target_wwpn, uint64_t lun)
5690 {
5691
5692 struct lpfc_device_data *lun_info;
5693
5694 if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5695 !phba->cfg_fof)
5696 return NULL;
5697
5698 /* Check to see if the lun is already enabled for OAS. */
5699
5700 list_for_each_entry(lun_info, list, listentry) {
5701 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5702 sizeof(struct lpfc_name)) == 0) &&
5703 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5704 sizeof(struct lpfc_name)) == 0) &&
5705 (lun_info->device_id.lun == lun))
5706 return lun_info;
5707 }
5708
5709 return NULL;
5710 }
5711
5712 /**
5713 * lpfc_find_next_oas_lun - searches for the next oas lun
5714 * @pha: Pointer to host bus adapter structure.
5715 * @vport_wwpn: Pointer to vport's wwpn information
5716 * @target_wwpn: Pointer to target's wwpn information
5717 * @starting_lun: Pointer to the lun to start searching for
5718 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5719 * @found_target_wwpn: Pointer to the found lun's target wwpn information
5720 * @found_lun: Pointer to the found lun.
5721 * @found_lun_status: Pointer to status of the found lun.
5722 *
5723 * This routine searches the luns list for the specified lun
5724 * or the first lun for the vport/target. If the vport wwpn contains
5725 * a zero value then a specific vport is not specified. In this case
5726 * any vport which contains the lun will be considered a match. If the
5727 * target wwpn contains a zero value then a specific target is not specified.
5728 * In this case any target which contains the lun will be considered a
5729 * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status
5730 * are returned. The function will also return the next lun if available.
5731 * If the next lun is not found, starting_lun parameter will be set to
5732 * NO_MORE_OAS_LUN.
5733 *
5734 * Return codes:
5735 * non-0 - Error
5736 * 0 - Success
5737 **/
5738 bool
5739 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5740 struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5741 struct lpfc_name *found_vport_wwpn,
5742 struct lpfc_name *found_target_wwpn,
5743 uint64_t *found_lun,
5744 uint32_t *found_lun_status,
5745 uint32_t *found_lun_pri)
5746 {
5747
5748 unsigned long flags;
5749 struct lpfc_device_data *lun_info;
5750 struct lpfc_device_id *device_id;
5751 uint64_t lun;
5752 bool found = false;
5753
5754 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5755 !starting_lun || !found_vport_wwpn ||
5756 !found_target_wwpn || !found_lun || !found_lun_status ||
5757 (*starting_lun == NO_MORE_OAS_LUN) ||
5758 !phba->cfg_fof)
5759 return false;
5760
5761 lun = *starting_lun;
5762 *found_lun = NO_MORE_OAS_LUN;
5763 *starting_lun = NO_MORE_OAS_LUN;
5764
5765 /* Search for lun or the lun closet in value */
5766
5767 spin_lock_irqsave(&phba->devicelock, flags);
5768 list_for_each_entry(lun_info, &phba->luns, listentry) {
5769 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5770 (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5771 sizeof(struct lpfc_name)) == 0)) &&
5772 ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5773 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5774 sizeof(struct lpfc_name)) == 0)) &&
5775 (lun_info->oas_enabled)) {
5776 device_id = &lun_info->device_id;
5777 if ((!found) &&
5778 ((lun == FIND_FIRST_OAS_LUN) ||
5779 (device_id->lun == lun))) {
5780 *found_lun = device_id->lun;
5781 memcpy(found_vport_wwpn,
5782 &device_id->vport_wwpn,
5783 sizeof(struct lpfc_name));
5784 memcpy(found_target_wwpn,
5785 &device_id->target_wwpn,
5786 sizeof(struct lpfc_name));
5787 if (lun_info->available)
5788 *found_lun_status =
5789 OAS_LUN_STATUS_EXISTS;
5790 else
5791 *found_lun_status = 0;
5792 *found_lun_pri = lun_info->priority;
5793 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5794 memset(vport_wwpn, 0x0,
5795 sizeof(struct lpfc_name));
5796 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5797 memset(target_wwpn, 0x0,
5798 sizeof(struct lpfc_name));
5799 found = true;
5800 } else if (found) {
5801 *starting_lun = device_id->lun;
5802 memcpy(vport_wwpn, &device_id->vport_wwpn,
5803 sizeof(struct lpfc_name));
5804 memcpy(target_wwpn, &device_id->target_wwpn,
5805 sizeof(struct lpfc_name));
5806 break;
5807 }
5808 }
5809 }
5810 spin_unlock_irqrestore(&phba->devicelock, flags);
5811 return found;
5812 }
5813
5814 /**
5815 * lpfc_enable_oas_lun - enables a lun for OAS operations
5816 * @pha: Pointer to host bus adapter structure.
5817 * @vport_wwpn: Pointer to vport's wwpn information
5818 * @target_wwpn: Pointer to target's wwpn information
5819 * @lun: Lun
5820 *
5821 * This routine enables a lun for oas operations. The routines does so by
5822 * doing the following :
5823 *
5824 * 1) Checks to see if the device data for the lun has been created.
5825 * 2) If found, sets the OAS enabled flag if not set and returns.
5826 * 3) Otherwise, creates a device data structure.
5827 * 4) If successfully created, indicates the device data is for an OAS lun,
5828 * indicates the lun is not available and add to the list of luns.
5829 *
5830 * Return codes:
5831 * false - Error
5832 * true - Success
5833 **/
5834 bool
5835 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5836 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5837 {
5838
5839 struct lpfc_device_data *lun_info;
5840 unsigned long flags;
5841
5842 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5843 !phba->cfg_fof)
5844 return false;
5845
5846 spin_lock_irqsave(&phba->devicelock, flags);
5847
5848 /* Check to see if the device data for the lun has been created */
5849 lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5850 target_wwpn, lun);
5851 if (lun_info) {
5852 if (!lun_info->oas_enabled)
5853 lun_info->oas_enabled = true;
5854 lun_info->priority = pri;
5855 spin_unlock_irqrestore(&phba->devicelock, flags);
5856 return true;
5857 }
5858
5859 /* Create an lun info structure and add to list of luns */
5860 lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5861 pri, false);
5862 if (lun_info) {
5863 lun_info->oas_enabled = true;
5864 lun_info->priority = pri;
5865 lun_info->available = false;
5866 list_add_tail(&lun_info->listentry, &phba->luns);
5867 spin_unlock_irqrestore(&phba->devicelock, flags);
5868 return true;
5869 }
5870 spin_unlock_irqrestore(&phba->devicelock, flags);
5871 return false;
5872 }
5873
5874 /**
5875 * lpfc_disable_oas_lun - disables a lun for OAS operations
5876 * @pha: Pointer to host bus adapter structure.
5877 * @vport_wwpn: Pointer to vport's wwpn information
5878 * @target_wwpn: Pointer to target's wwpn information
5879 * @lun: Lun
5880 *
5881 * This routine disables a lun for oas operations. The routines does so by
5882 * doing the following :
5883 *
5884 * 1) Checks to see if the device data for the lun is created.
5885 * 2) If present, clears the flag indicating this lun is for OAS.
5886 * 3) If the lun is not available by the system, the device data is
5887 * freed.
5888 *
5889 * Return codes:
5890 * false - Error
5891 * true - Success
5892 **/
5893 bool
5894 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5895 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5896 {
5897
5898 struct lpfc_device_data *lun_info;
5899 unsigned long flags;
5900
5901 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5902 !phba->cfg_fof)
5903 return false;
5904
5905 spin_lock_irqsave(&phba->devicelock, flags);
5906
5907 /* Check to see if the lun is available. */
5908 lun_info = __lpfc_get_device_data(phba,
5909 &phba->luns, vport_wwpn,
5910 target_wwpn, lun);
5911 if (lun_info) {
5912 lun_info->oas_enabled = false;
5913 lun_info->priority = pri;
5914 if (!lun_info->available)
5915 lpfc_delete_device_data(phba, lun_info);
5916 spin_unlock_irqrestore(&phba->devicelock, flags);
5917 return true;
5918 }
5919
5920 spin_unlock_irqrestore(&phba->devicelock, flags);
5921 return false;
5922 }
5923
5924 static int
5925 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
5926 {
5927 return SCSI_MLQUEUE_HOST_BUSY;
5928 }
5929
5930 static int
5931 lpfc_no_handler(struct scsi_cmnd *cmnd)
5932 {
5933 return FAILED;
5934 }
5935
5936 static int
5937 lpfc_no_slave(struct scsi_device *sdev)
5938 {
5939 return -ENODEV;
5940 }
5941
5942 struct scsi_host_template lpfc_template_nvme = {
5943 .module = THIS_MODULE,
5944 .name = LPFC_DRIVER_NAME,
5945 .proc_name = LPFC_DRIVER_NAME,
5946 .info = lpfc_info,
5947 .queuecommand = lpfc_no_command,
5948 .eh_abort_handler = lpfc_no_handler,
5949 .eh_device_reset_handler = lpfc_no_handler,
5950 .eh_target_reset_handler = lpfc_no_handler,
5951 .eh_bus_reset_handler = lpfc_no_handler,
5952 .eh_host_reset_handler = lpfc_no_handler,
5953 .slave_alloc = lpfc_no_slave,
5954 .slave_configure = lpfc_no_slave,
5955 .scan_finished = lpfc_scan_finished,
5956 .this_id = -1,
5957 .sg_tablesize = 1,
5958 .cmd_per_lun = 1,
5959 .use_clustering = ENABLE_CLUSTERING,
5960 .shost_attrs = lpfc_hba_attrs,
5961 .max_sectors = 0xFFFF,
5962 .vendor_id = LPFC_NL_VENDOR_ID,
5963 .track_queue_depth = 0,
5964 };
5965
5966 struct scsi_host_template lpfc_template_no_hr = {
5967 .module = THIS_MODULE,
5968 .name = LPFC_DRIVER_NAME,
5969 .proc_name = LPFC_DRIVER_NAME,
5970 .info = lpfc_info,
5971 .queuecommand = lpfc_queuecommand,
5972 .eh_timed_out = fc_eh_timed_out,
5973 .eh_abort_handler = lpfc_abort_handler,
5974 .eh_device_reset_handler = lpfc_device_reset_handler,
5975 .eh_target_reset_handler = lpfc_target_reset_handler,
5976 .eh_bus_reset_handler = lpfc_bus_reset_handler,
5977 .slave_alloc = lpfc_slave_alloc,
5978 .slave_configure = lpfc_slave_configure,
5979 .slave_destroy = lpfc_slave_destroy,
5980 .scan_finished = lpfc_scan_finished,
5981 .this_id = -1,
5982 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
5983 .cmd_per_lun = LPFC_CMD_PER_LUN,
5984 .use_clustering = ENABLE_CLUSTERING,
5985 .shost_attrs = lpfc_hba_attrs,
5986 .max_sectors = 0xFFFF,
5987 .vendor_id = LPFC_NL_VENDOR_ID,
5988 .change_queue_depth = scsi_change_queue_depth,
5989 .track_queue_depth = 1,
5990 };
5991
5992 struct scsi_host_template lpfc_template = {
5993 .module = THIS_MODULE,
5994 .name = LPFC_DRIVER_NAME,
5995 .proc_name = LPFC_DRIVER_NAME,
5996 .info = lpfc_info,
5997 .queuecommand = lpfc_queuecommand,
5998 .eh_timed_out = fc_eh_timed_out,
5999 .eh_abort_handler = lpfc_abort_handler,
6000 .eh_device_reset_handler = lpfc_device_reset_handler,
6001 .eh_target_reset_handler = lpfc_target_reset_handler,
6002 .eh_bus_reset_handler = lpfc_bus_reset_handler,
6003 .eh_host_reset_handler = lpfc_host_reset_handler,
6004 .slave_alloc = lpfc_slave_alloc,
6005 .slave_configure = lpfc_slave_configure,
6006 .slave_destroy = lpfc_slave_destroy,
6007 .scan_finished = lpfc_scan_finished,
6008 .this_id = -1,
6009 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
6010 .cmd_per_lun = LPFC_CMD_PER_LUN,
6011 .use_clustering = ENABLE_CLUSTERING,
6012 .shost_attrs = lpfc_hba_attrs,
6013 .max_sectors = 0xFFFF,
6014 .vendor_id = LPFC_NL_VENDOR_ID,
6015 .change_queue_depth = scsi_change_queue_depth,
6016 .track_queue_depth = 1,
6017 };
6018
6019 struct scsi_host_template lpfc_vport_template = {
6020 .module = THIS_MODULE,
6021 .name = LPFC_DRIVER_NAME,
6022 .proc_name = LPFC_DRIVER_NAME,
6023 .info = lpfc_info,
6024 .queuecommand = lpfc_queuecommand,
6025 .eh_timed_out = fc_eh_timed_out,
6026 .eh_abort_handler = lpfc_abort_handler,
6027 .eh_device_reset_handler = lpfc_device_reset_handler,
6028 .eh_target_reset_handler = lpfc_target_reset_handler,
6029 .slave_alloc = lpfc_slave_alloc,
6030 .slave_configure = lpfc_slave_configure,
6031 .slave_destroy = lpfc_slave_destroy,
6032 .scan_finished = lpfc_scan_finished,
6033 .this_id = -1,
6034 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
6035 .cmd_per_lun = LPFC_CMD_PER_LUN,
6036 .use_clustering = ENABLE_CLUSTERING,
6037 .shost_attrs = lpfc_vport_attrs,
6038 .max_sectors = 0xFFFF,
6039 .change_queue_depth = scsi_change_queue_depth,
6040 .track_queue_depth = 1,
6041 };
Linux with added FPC-III support