1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2016 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
10 * *
11 * This program is free software; you can redistribute it and/or *
12 * modify it under the terms of version 2 of the GNU General *
13 * Public License as published by the Free Software Foundation. *
14 * This program is distributed in the hope that it will be useful. *
15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19 * TO BE LEGALLY INVALID. See the GNU General Public License for *
20 * more details, a copy of which can be found in the file COPYING *
21 * included with this package. *
22 *******************************************************************/
23 #include <linux/pci.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/export.h>
27 #include <linux/delay.h>
28 #include <asm/unaligned.h>
29 #include <linux/t10-pi.h>
30 #include <linux/crc-t10dif.h>
31 #include <linux/blk-cgroup.h>
32 #include <net/checksum.h>
33
34 #include <scsi/scsi.h>
35 #include <scsi/scsi_device.h>
36 #include <scsi/scsi_eh.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <scsi/scsi_transport_fc.h>
40
41 #include "lpfc_version.h"
42 #include "lpfc_hw4.h"
43 #include "lpfc_hw.h"
44 #include "lpfc_sli.h"
45 #include "lpfc_sli4.h"
46 #include "lpfc_nl.h"
47 #include "lpfc_disc.h"
48 #include "lpfc.h"
49 #include "lpfc_scsi.h"
50 #include "lpfc_logmsg.h"
51 #include "lpfc_crtn.h"
52 #include "lpfc_vport.h"
53
54 #define LPFC_RESET_WAIT 2
55 #define LPFC_ABORT_WAIT 2
56
57 static char *dif_op_str[] = {
58 "PROT_NORMAL",
59 "PROT_READ_INSERT",
60 "PROT_WRITE_STRIP",
61 "PROT_READ_STRIP",
62 "PROT_WRITE_INSERT",
63 "PROT_READ_PASS",
64 "PROT_WRITE_PASS",
65 };
66
67 struct scsi_dif_tuple {
68 __be16 guard_tag; /* Checksum */
69 __be16 app_tag; /* Opaque storage */
70 __be32 ref_tag; /* Target LBA or indirect LBA */
71 };
72
73 static struct lpfc_rport_data *
lpfc_rport_data_from_scsi_device(struct scsi_device * sdev)74 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
75 {
76 struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
77
78 if (vport->phba->cfg_fof)
79 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
80 else
81 return (struct lpfc_rport_data *)sdev->hostdata;
82 }
83
84 static void
85 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
86 static void
87 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
88 static int
89 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
90 static void
91 lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
92 struct lpfc_vmid *vmp);
93 static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
94 *cmd, struct lpfc_vmid *vmp,
95 union lpfc_vmid_io_tag *tag);
96 static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
97 struct lpfc_vmid *vmid);
98
99 /**
100 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
101 * @phba: Pointer to HBA object.
102 * @lpfc_cmd: lpfc scsi command object pointer.
103 *
104 * This function is called from the lpfc_prep_task_mgmt_cmd function to
105 * set the last bit in the response sge entry.
106 **/
107 static void
lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)108 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
109 struct lpfc_io_buf *lpfc_cmd)
110 {
111 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
112 if (sgl) {
113 sgl += 1;
114 sgl->word2 = le32_to_cpu(sgl->word2);
115 bf_set(lpfc_sli4_sge_last, sgl, 1);
116 sgl->word2 = cpu_to_le32(sgl->word2);
117 }
118 }
119
120 /**
121 * lpfc_update_stats - Update statistical data for the command completion
122 * @vport: The virtual port on which this call is executing.
123 * @lpfc_cmd: lpfc scsi command object pointer.
124 *
125 * This function is called when there is a command completion and this
126 * function updates the statistical data for the command completion.
127 **/
128 static void
lpfc_update_stats(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd)129 lpfc_update_stats(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
130 {
131 struct lpfc_hba *phba = vport->phba;
132 struct lpfc_rport_data *rdata;
133 struct lpfc_nodelist *pnode;
134 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
135 unsigned long flags;
136 struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
137 unsigned long latency;
138 int i;
139
140 if (!vport->stat_data_enabled ||
141 vport->stat_data_blocked ||
142 (cmd->result))
143 return;
144
145 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
146 rdata = lpfc_cmd->rdata;
147 pnode = rdata->pnode;
148
149 spin_lock_irqsave(shost->host_lock, flags);
150 if (!pnode ||
151 !pnode->lat_data ||
152 (phba->bucket_type == LPFC_NO_BUCKET)) {
153 spin_unlock_irqrestore(shost->host_lock, flags);
154 return;
155 }
156
157 if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
158 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
159 phba->bucket_step;
160 /* check array subscript bounds */
161 if (i < 0)
162 i = 0;
163 else if (i >= LPFC_MAX_BUCKET_COUNT)
164 i = LPFC_MAX_BUCKET_COUNT - 1;
165 } else {
166 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
167 if (latency <= (phba->bucket_base +
168 ((1<<i)*phba->bucket_step)))
169 break;
170 }
171
172 pnode->lat_data[i].cmd_count++;
173 spin_unlock_irqrestore(shost->host_lock, flags);
174 }
175
176 /**
177 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
178 * @phba: The Hba for which this call is being executed.
179 *
180 * This routine is called when there is resource error in driver or firmware.
181 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
182 * posts at most 1 event each second. This routine wakes up worker thread of
183 * @phba to process WORKER_RAM_DOWN_EVENT event.
184 *
185 * This routine should be called with no lock held.
186 **/
187 void
lpfc_rampdown_queue_depth(struct lpfc_hba * phba)188 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
189 {
190 unsigned long flags;
191 uint32_t evt_posted;
192 unsigned long expires;
193
194 spin_lock_irqsave(&phba->hbalock, flags);
195 atomic_inc(&phba->num_rsrc_err);
196 phba->last_rsrc_error_time = jiffies;
197
198 expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
199 if (time_after(expires, jiffies)) {
200 spin_unlock_irqrestore(&phba->hbalock, flags);
201 return;
202 }
203
204 phba->last_ramp_down_time = jiffies;
205
206 spin_unlock_irqrestore(&phba->hbalock, flags);
207
208 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
209 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
210 if (!evt_posted)
211 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
212 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
213
214 if (!evt_posted)
215 lpfc_worker_wake_up(phba);
216 return;
217 }
218
219 /**
220 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
221 * @phba: The Hba for which this call is being executed.
222 *
223 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
224 * thread.This routine reduces queue depth for all scsi device on each vport
225 * associated with @phba.
226 **/
227 void
lpfc_ramp_down_queue_handler(struct lpfc_hba * phba)228 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
229 {
230 struct lpfc_vport **vports;
231 struct Scsi_Host *shost;
232 struct scsi_device *sdev;
233 unsigned long new_queue_depth;
234 unsigned long num_rsrc_err, num_cmd_success;
235 int i;
236
237 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
238 num_cmd_success = atomic_read(&phba->num_cmd_success);
239
240 /*
241 * The error and success command counters are global per
242 * driver instance. If another handler has already
243 * operated on this error event, just exit.
244 */
245 if (num_rsrc_err == 0)
246 return;
247
248 vports = lpfc_create_vport_work_array(phba);
249 if (vports != NULL)
250 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
251 shost = lpfc_shost_from_vport(vports[i]);
252 shost_for_each_device(sdev, shost) {
253 new_queue_depth =
254 sdev->queue_depth * num_rsrc_err /
255 (num_rsrc_err + num_cmd_success);
256 if (!new_queue_depth)
257 new_queue_depth = sdev->queue_depth - 1;
258 else
259 new_queue_depth = sdev->queue_depth -
260 new_queue_depth;
261 scsi_change_queue_depth(sdev, new_queue_depth);
262 }
263 }
264 lpfc_destroy_vport_work_array(phba, vports);
265 atomic_set(&phba->num_rsrc_err, 0);
266 atomic_set(&phba->num_cmd_success, 0);
267 }
268
269 /**
270 * lpfc_scsi_dev_block - set all scsi hosts to block state
271 * @phba: Pointer to HBA context object.
272 *
273 * This function walks vport list and set each SCSI host to block state
274 * by invoking fc_remote_port_delete() routine. This function is invoked
275 * with EEH when device's PCI slot has been permanently disabled.
276 **/
277 void
lpfc_scsi_dev_block(struct lpfc_hba * phba)278 lpfc_scsi_dev_block(struct lpfc_hba *phba)
279 {
280 struct lpfc_vport **vports;
281 struct Scsi_Host *shost;
282 struct scsi_device *sdev;
283 struct fc_rport *rport;
284 int i;
285
286 vports = lpfc_create_vport_work_array(phba);
287 if (vports != NULL)
288 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
289 shost = lpfc_shost_from_vport(vports[i]);
290 shost_for_each_device(sdev, shost) {
291 rport = starget_to_rport(scsi_target(sdev));
292 fc_remote_port_delete(rport);
293 }
294 }
295 lpfc_destroy_vport_work_array(phba, vports);
296 }
297
298 /**
299 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
300 * @vport: The virtual port for which this call being executed.
301 * @num_to_alloc: The requested number of buffers to allocate.
302 *
303 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
304 * the scsi buffer contains all the necessary information needed to initiate
305 * a SCSI I/O. The non-DMAable buffer region contains information to build
306 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
307 * and the initial BPL. In addition to allocating memory, the FCP CMND and
308 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
309 *
310 * Return codes:
311 * int - number of scsi buffers that were allocated.
312 * 0 = failure, less than num_to_alloc is a partial failure.
313 **/
314 static int
lpfc_new_scsi_buf_s3(struct lpfc_vport * vport,int num_to_alloc)315 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
316 {
317 struct lpfc_hba *phba = vport->phba;
318 struct lpfc_io_buf *psb;
319 struct ulp_bde64 *bpl;
320 IOCB_t *iocb;
321 dma_addr_t pdma_phys_fcp_cmd;
322 dma_addr_t pdma_phys_fcp_rsp;
323 dma_addr_t pdma_phys_sgl;
324 uint16_t iotag;
325 int bcnt, bpl_size;
326
327 bpl_size = phba->cfg_sg_dma_buf_size -
328 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
329
330 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
331 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
332 num_to_alloc, phba->cfg_sg_dma_buf_size,
333 (int)sizeof(struct fcp_cmnd),
334 (int)sizeof(struct fcp_rsp), bpl_size);
335
336 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
337 psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL);
338 if (!psb)
339 break;
340
341 /*
342 * Get memory from the pci pool to map the virt space to pci
343 * bus space for an I/O. The DMA buffer includes space for the
344 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
345 * necessary to support the sg_tablesize.
346 */
347 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
348 GFP_KERNEL, &psb->dma_handle);
349 if (!psb->data) {
350 kfree(psb);
351 break;
352 }
353
354
355 /* Allocate iotag for psb->cur_iocbq. */
356 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
357 if (iotag == 0) {
358 dma_pool_free(phba->lpfc_sg_dma_buf_pool,
359 psb->data, psb->dma_handle);
360 kfree(psb);
361 break;
362 }
363 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
364
365 psb->fcp_cmnd = psb->data;
366 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
367 psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) +
368 sizeof(struct fcp_rsp);
369
370 /* Initialize local short-hand pointers. */
371 bpl = (struct ulp_bde64 *)psb->dma_sgl;
372 pdma_phys_fcp_cmd = psb->dma_handle;
373 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
374 pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) +
375 sizeof(struct fcp_rsp);
376
377 /*
378 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
379 * are sg list bdes. Initialize the first two and leave the
380 * rest for queuecommand.
381 */
382 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
383 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
384 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
385 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
386 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
387
388 /* Setup the physical region for the FCP RSP */
389 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
390 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
391 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
392 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
393 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
394
395 /*
396 * Since the IOCB for the FCP I/O is built into this
397 * lpfc_scsi_buf, initialize it with all known data now.
398 */
399 iocb = &psb->cur_iocbq.iocb;
400 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
401 if ((phba->sli_rev == 3) &&
402 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
403 /* fill in immediate fcp command BDE */
404 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
405 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
406 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
407 unsli3.fcp_ext.icd);
408 iocb->un.fcpi64.bdl.addrHigh = 0;
409 iocb->ulpBdeCount = 0;
410 iocb->ulpLe = 0;
411 /* fill in response BDE */
412 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
413 BUFF_TYPE_BDE_64;
414 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
415 sizeof(struct fcp_rsp);
416 iocb->unsli3.fcp_ext.rbde.addrLow =
417 putPaddrLow(pdma_phys_fcp_rsp);
418 iocb->unsli3.fcp_ext.rbde.addrHigh =
419 putPaddrHigh(pdma_phys_fcp_rsp);
420 } else {
421 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
422 iocb->un.fcpi64.bdl.bdeSize =
423 (2 * sizeof(struct ulp_bde64));
424 iocb->un.fcpi64.bdl.addrLow =
425 putPaddrLow(pdma_phys_sgl);
426 iocb->un.fcpi64.bdl.addrHigh =
427 putPaddrHigh(pdma_phys_sgl);
428 iocb->ulpBdeCount = 1;
429 iocb->ulpLe = 1;
430 }
431 iocb->ulpClass = CLASS3;
432 psb->status = IOSTAT_SUCCESS;
433 /* Put it back into the SCSI buffer list */
434 psb->cur_iocbq.context1 = psb;
435 spin_lock_init(&psb->buf_lock);
436 lpfc_release_scsi_buf_s3(phba, psb);
437
438 }
439
440 return bcnt;
441 }
442
443 /**
444 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
445 * @vport: pointer to lpfc vport data structure.
446 *
447 * This routine is invoked by the vport cleanup for deletions and the cleanup
448 * for an ndlp on removal.
449 **/
450 void
lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport * vport)451 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
452 {
453 struct lpfc_hba *phba = vport->phba;
454 struct lpfc_io_buf *psb, *next_psb;
455 struct lpfc_sli4_hdw_queue *qp;
456 unsigned long iflag = 0;
457 int idx;
458
459 if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
460 return;
461
462 spin_lock_irqsave(&phba->hbalock, iflag);
463 for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
464 qp = &phba->sli4_hba.hdwq[idx];
465
466 spin_lock(&qp->abts_io_buf_list_lock);
467 list_for_each_entry_safe(psb, next_psb,
468 &qp->lpfc_abts_io_buf_list, list) {
469 if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME)
470 continue;
471
472 if (psb->rdata && psb->rdata->pnode &&
473 psb->rdata->pnode->vport == vport)
474 psb->rdata = NULL;
475 }
476 spin_unlock(&qp->abts_io_buf_list_lock);
477 }
478 spin_unlock_irqrestore(&phba->hbalock, iflag);
479 }
480
481 /**
482 * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort
483 * @phba: pointer to lpfc hba data structure.
484 * @axri: pointer to the fcp xri abort wcqe structure.
485 * @idx: index into hdwq
486 *
487 * This routine is invoked by the worker thread to process a SLI4 fast-path
488 * FCP or NVME aborted xri.
489 **/
490 void
lpfc_sli4_io_xri_aborted(struct lpfc_hba * phba,struct sli4_wcqe_xri_aborted * axri,int idx)491 lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba,
492 struct sli4_wcqe_xri_aborted *axri, int idx)
493 {
494 u16 xri = 0;
495 u16 rxid = 0;
496 struct lpfc_io_buf *psb, *next_psb;
497 struct lpfc_sli4_hdw_queue *qp;
498 unsigned long iflag = 0;
499 struct lpfc_iocbq *iocbq;
500 int i;
501 struct lpfc_nodelist *ndlp;
502 int rrq_empty = 0;
503 struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
504 struct scsi_cmnd *cmd;
505 int offline = 0;
506
507 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
508 return;
509 offline = pci_channel_offline(phba->pcidev);
510 if (!offline) {
511 xri = bf_get(lpfc_wcqe_xa_xri, axri);
512 rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
513 }
514 qp = &phba->sli4_hba.hdwq[idx];
515 spin_lock_irqsave(&phba->hbalock, iflag);
516 spin_lock(&qp->abts_io_buf_list_lock);
517 list_for_each_entry_safe(psb, next_psb,
518 &qp->lpfc_abts_io_buf_list, list) {
519 if (offline)
520 xri = psb->cur_iocbq.sli4_xritag;
521 if (psb->cur_iocbq.sli4_xritag == xri) {
522 list_del_init(&psb->list);
523 psb->flags &= ~LPFC_SBUF_XBUSY;
524 psb->status = IOSTAT_SUCCESS;
525 if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME) {
526 qp->abts_nvme_io_bufs--;
527 spin_unlock(&qp->abts_io_buf_list_lock);
528 spin_unlock_irqrestore(&phba->hbalock, iflag);
529 if (!offline) {
530 lpfc_sli4_nvme_xri_aborted(phba, axri,
531 psb);
532 return;
533 }
534 lpfc_sli4_nvme_pci_offline_aborted(phba, psb);
535 spin_lock_irqsave(&phba->hbalock, iflag);
536 spin_lock(&qp->abts_io_buf_list_lock);
537 continue;
538 }
539 qp->abts_scsi_io_bufs--;
540 spin_unlock(&qp->abts_io_buf_list_lock);
541
542 if (psb->rdata && psb->rdata->pnode)
543 ndlp = psb->rdata->pnode;
544 else
545 ndlp = NULL;
546
547 rrq_empty = list_empty(&phba->active_rrq_list);
548 spin_unlock_irqrestore(&phba->hbalock, iflag);
549 if (ndlp && !offline) {
550 lpfc_set_rrq_active(phba, ndlp,
551 psb->cur_iocbq.sli4_lxritag, rxid, 1);
552 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
553 }
554
555 if (phba->cfg_fcp_wait_abts_rsp || offline) {
556 spin_lock_irqsave(&psb->buf_lock, iflag);
557 cmd = psb->pCmd;
558 psb->pCmd = NULL;
559 spin_unlock_irqrestore(&psb->buf_lock, iflag);
560
561 /* The sdev is not guaranteed to be valid post
562 * scsi_done upcall.
563 */
564 if (cmd)
565 cmd->scsi_done(cmd);
566
567 /*
568 * We expect there is an abort thread waiting
569 * for command completion wake up the thread.
570 */
571 spin_lock_irqsave(&psb->buf_lock, iflag);
572 psb->cur_iocbq.iocb_flag &=
573 ~LPFC_DRIVER_ABORTED;
574 if (psb->waitq)
575 wake_up(psb->waitq);
576 spin_unlock_irqrestore(&psb->buf_lock, iflag);
577 }
578
579 lpfc_release_scsi_buf_s4(phba, psb);
580 if (rrq_empty)
581 lpfc_worker_wake_up(phba);
582 if (!offline)
583 return;
584 spin_lock_irqsave(&phba->hbalock, iflag);
585 spin_lock(&qp->abts_io_buf_list_lock);
586 continue;
587 }
588 }
589 spin_unlock(&qp->abts_io_buf_list_lock);
590 if (!offline) {
591 for (i = 1; i <= phba->sli.last_iotag; i++) {
592 iocbq = phba->sli.iocbq_lookup[i];
593
594 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
595 (iocbq->iocb_flag & LPFC_IO_LIBDFC))
596 continue;
597 if (iocbq->sli4_xritag != xri)
598 continue;
599 psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq);
600 psb->flags &= ~LPFC_SBUF_XBUSY;
601 spin_unlock_irqrestore(&phba->hbalock, iflag);
602 if (!list_empty(&pring->txq))
603 lpfc_worker_wake_up(phba);
604 return;
605 }
606 }
607 spin_unlock_irqrestore(&phba->hbalock, iflag);
608 }
609
610 /**
611 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
612 * @phba: The HBA for which this call is being executed.
613 * @ndlp: pointer to a node-list data structure.
614 * @cmnd: Pointer to scsi_cmnd data structure.
615 *
616 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
617 * and returns to caller.
618 *
619 * Return codes:
620 * NULL - Error
621 * Pointer to lpfc_scsi_buf - Success
622 **/
623 static struct lpfc_io_buf *
lpfc_get_scsi_buf_s3(struct lpfc_hba * phba,struct lpfc_nodelist * ndlp,struct scsi_cmnd * cmnd)624 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
625 struct scsi_cmnd *cmnd)
626 {
627 struct lpfc_io_buf *lpfc_cmd = NULL;
628 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
629 unsigned long iflag = 0;
630
631 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
632 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf,
633 list);
634 if (!lpfc_cmd) {
635 spin_lock(&phba->scsi_buf_list_put_lock);
636 list_splice(&phba->lpfc_scsi_buf_list_put,
637 &phba->lpfc_scsi_buf_list_get);
638 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
639 list_remove_head(scsi_buf_list_get, lpfc_cmd,
640 struct lpfc_io_buf, list);
641 spin_unlock(&phba->scsi_buf_list_put_lock);
642 }
643 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
644
645 if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
646 atomic_inc(&ndlp->cmd_pending);
647 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
648 }
649 return lpfc_cmd;
650 }
651 /**
652 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA
653 * @phba: The HBA for which this call is being executed.
654 * @ndlp: pointer to a node-list data structure.
655 * @cmnd: Pointer to scsi_cmnd data structure.
656 *
657 * This routine removes a scsi buffer from head of @hdwq io_buf_list
658 * and returns to caller.
659 *
660 * Return codes:
661 * NULL - Error
662 * Pointer to lpfc_scsi_buf - Success
663 **/
664 static struct lpfc_io_buf *
lpfc_get_scsi_buf_s4(struct lpfc_hba * phba,struct lpfc_nodelist * ndlp,struct scsi_cmnd * cmnd)665 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
666 struct scsi_cmnd *cmnd)
667 {
668 struct lpfc_io_buf *lpfc_cmd;
669 struct lpfc_sli4_hdw_queue *qp;
670 struct sli4_sge *sgl;
671 dma_addr_t pdma_phys_fcp_rsp;
672 dma_addr_t pdma_phys_fcp_cmd;
673 uint32_t cpu, idx;
674 int tag;
675 struct fcp_cmd_rsp_buf *tmp = NULL;
676
677 cpu = raw_smp_processor_id();
678 if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
679 tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
680 idx = blk_mq_unique_tag_to_hwq(tag);
681 } else {
682 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
683 }
684
685 lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx,
686 !phba->cfg_xri_rebalancing);
687 if (!lpfc_cmd) {
688 qp = &phba->sli4_hba.hdwq[idx];
689 qp->empty_io_bufs++;
690 return NULL;
691 }
692
693 /* Setup key fields in buffer that may have been changed
694 * if other protocols used this buffer.
695 */
696 lpfc_cmd->cur_iocbq.iocb_flag = LPFC_IO_FCP;
697 lpfc_cmd->prot_seg_cnt = 0;
698 lpfc_cmd->seg_cnt = 0;
699 lpfc_cmd->timeout = 0;
700 lpfc_cmd->flags = 0;
701 lpfc_cmd->start_time = jiffies;
702 lpfc_cmd->waitq = NULL;
703 lpfc_cmd->cpu = cpu;
704 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
705 lpfc_cmd->prot_data_type = 0;
706 #endif
707 tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
708 if (!tmp) {
709 lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq);
710 return NULL;
711 }
712
713 lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
714 lpfc_cmd->fcp_rsp = tmp->fcp_rsp;
715
716 /*
717 * The first two SGEs are the FCP_CMD and FCP_RSP.
718 * The balance are sg list bdes. Initialize the
719 * first two and leave the rest for queuecommand.
720 */
721 sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
722 pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle;
723 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
724 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
725 sgl->word2 = le32_to_cpu(sgl->word2);
726 bf_set(lpfc_sli4_sge_last, sgl, 0);
727 sgl->word2 = cpu_to_le32(sgl->word2);
728 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
729 sgl++;
730
731 /* Setup the physical region for the FCP RSP */
732 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
733 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
734 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
735 sgl->word2 = le32_to_cpu(sgl->word2);
736 bf_set(lpfc_sli4_sge_last, sgl, 1);
737 sgl->word2 = cpu_to_le32(sgl->word2);
738 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
739
740 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
741 atomic_inc(&ndlp->cmd_pending);
742 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
743 }
744 return lpfc_cmd;
745 }
746 /**
747 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
748 * @phba: The HBA for which this call is being executed.
749 * @ndlp: pointer to a node-list data structure.
750 * @cmnd: Pointer to scsi_cmnd data structure.
751 *
752 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
753 * and returns to caller.
754 *
755 * Return codes:
756 * NULL - Error
757 * Pointer to lpfc_scsi_buf - Success
758 **/
759 static struct lpfc_io_buf*
lpfc_get_scsi_buf(struct lpfc_hba * phba,struct lpfc_nodelist * ndlp,struct scsi_cmnd * cmnd)760 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
761 struct scsi_cmnd *cmnd)
762 {
763 return phba->lpfc_get_scsi_buf(phba, ndlp, cmnd);
764 }
765
766 /**
767 * lpfc_release_scsi_buf_s3 - Return a scsi buffer back to hba scsi buf list
768 * @phba: The Hba for which this call is being executed.
769 * @psb: The scsi buffer which is being released.
770 *
771 * This routine releases @psb scsi buffer by adding it to tail of @phba
772 * lpfc_scsi_buf_list list.
773 **/
774 static void
lpfc_release_scsi_buf_s3(struct lpfc_hba * phba,struct lpfc_io_buf * psb)775 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
776 {
777 unsigned long iflag = 0;
778
779 psb->seg_cnt = 0;
780 psb->prot_seg_cnt = 0;
781
782 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
783 psb->pCmd = NULL;
784 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
785 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
786 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
787 }
788
789 /**
790 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
791 * @phba: The Hba for which this call is being executed.
792 * @psb: The scsi buffer which is being released.
793 *
794 * This routine releases @psb scsi buffer by adding it to tail of @hdwq
795 * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer
796 * and cannot be reused for at least RA_TOV amount of time if it was
797 * aborted.
798 **/
799 static void
lpfc_release_scsi_buf_s4(struct lpfc_hba * phba,struct lpfc_io_buf * psb)800 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
801 {
802 struct lpfc_sli4_hdw_queue *qp;
803 unsigned long iflag = 0;
804
805 psb->seg_cnt = 0;
806 psb->prot_seg_cnt = 0;
807
808 qp = psb->hdwq;
809 if (psb->flags & LPFC_SBUF_XBUSY) {
810 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
811 if (!phba->cfg_fcp_wait_abts_rsp)
812 psb->pCmd = NULL;
813 list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list);
814 qp->abts_scsi_io_bufs++;
815 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
816 } else {
817 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp);
818 }
819 }
820
821 /**
822 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
823 * @phba: The Hba for which this call is being executed.
824 * @psb: The scsi buffer which is being released.
825 *
826 * This routine releases @psb scsi buffer by adding it to tail of @phba
827 * lpfc_scsi_buf_list list.
828 **/
829 static void
lpfc_release_scsi_buf(struct lpfc_hba * phba,struct lpfc_io_buf * psb)830 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
831 {
832 if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
833 atomic_dec(&psb->ndlp->cmd_pending);
834
835 psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
836 phba->lpfc_release_scsi_buf(phba, psb);
837 }
838
839 /**
840 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
841 * @data: A pointer to the immediate command data portion of the IOCB.
842 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
843 *
844 * The routine copies the entire FCP command from @fcp_cmnd to @data while
845 * byte swapping the data to big endian format for transmission on the wire.
846 **/
847 static void
lpfc_fcpcmd_to_iocb(u8 * data,struct fcp_cmnd * fcp_cmnd)848 lpfc_fcpcmd_to_iocb(u8 *data, struct fcp_cmnd *fcp_cmnd)
849 {
850 int i, j;
851
852 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
853 i += sizeof(uint32_t), j++) {
854 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
855 }
856 }
857
858 /**
859 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
860 * @phba: The Hba for which this call is being executed.
861 * @lpfc_cmd: The scsi buffer which is going to be mapped.
862 *
863 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
864 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
865 * through sg elements and format the bde. This routine also initializes all
866 * IOCB fields which are dependent on scsi command request buffer.
867 *
868 * Return codes:
869 * 1 - Error
870 * 0 - Success
871 **/
872 static int
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)873 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
874 {
875 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
876 struct scatterlist *sgel = NULL;
877 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
878 struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
879 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
880 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
881 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
882 dma_addr_t physaddr;
883 uint32_t num_bde = 0;
884 int nseg, datadir = scsi_cmnd->sc_data_direction;
885
886 /*
887 * There are three possibilities here - use scatter-gather segment, use
888 * the single mapping, or neither. Start the lpfc command prep by
889 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
890 * data bde entry.
891 */
892 bpl += 2;
893 if (scsi_sg_count(scsi_cmnd)) {
894 /*
895 * The driver stores the segment count returned from pci_map_sg
896 * because this a count of dma-mappings used to map the use_sg
897 * pages. They are not guaranteed to be the same for those
898 * architectures that implement an IOMMU.
899 */
900
901 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
902 scsi_sg_count(scsi_cmnd), datadir);
903 if (unlikely(!nseg))
904 return 1;
905
906 lpfc_cmd->seg_cnt = nseg;
907 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
908 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
909 "9064 BLKGRD: %s: Too many sg segments"
910 " from dma_map_sg. Config %d, seg_cnt"
911 " %d\n", __func__, phba->cfg_sg_seg_cnt,
912 lpfc_cmd->seg_cnt);
913 WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
914 lpfc_cmd->seg_cnt = 0;
915 scsi_dma_unmap(scsi_cmnd);
916 return 2;
917 }
918
919 /*
920 * The driver established a maximum scatter-gather segment count
921 * during probe that limits the number of sg elements in any
922 * single scsi command. Just run through the seg_cnt and format
923 * the bde's.
924 * When using SLI-3 the driver will try to fit all the BDEs into
925 * the IOCB. If it can't then the BDEs get added to a BPL as it
926 * does for SLI-2 mode.
927 */
928 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
929 physaddr = sg_dma_address(sgel);
930 if (phba->sli_rev == 3 &&
931 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
932 !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
933 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
934 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
935 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
936 data_bde->addrLow = putPaddrLow(physaddr);
937 data_bde->addrHigh = putPaddrHigh(physaddr);
938 data_bde++;
939 } else {
940 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
941 bpl->tus.f.bdeSize = sg_dma_len(sgel);
942 bpl->tus.w = le32_to_cpu(bpl->tus.w);
943 bpl->addrLow =
944 le32_to_cpu(putPaddrLow(physaddr));
945 bpl->addrHigh =
946 le32_to_cpu(putPaddrHigh(physaddr));
947 bpl++;
948 }
949 }
950 }
951
952 /*
953 * Finish initializing those IOCB fields that are dependent on the
954 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
955 * explicitly reinitialized and for SLI-3 the extended bde count is
956 * explicitly reinitialized since all iocb memory resources are reused.
957 */
958 if (phba->sli_rev == 3 &&
959 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
960 !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
961 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
962 /*
963 * The extended IOCB format can only fit 3 BDE or a BPL.
964 * This I/O has more than 3 BDE so the 1st data bde will
965 * be a BPL that is filled in here.
966 */
967 physaddr = lpfc_cmd->dma_handle;
968 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
969 data_bde->tus.f.bdeSize = (num_bde *
970 sizeof(struct ulp_bde64));
971 physaddr += (sizeof(struct fcp_cmnd) +
972 sizeof(struct fcp_rsp) +
973 (2 * sizeof(struct ulp_bde64)));
974 data_bde->addrHigh = putPaddrHigh(physaddr);
975 data_bde->addrLow = putPaddrLow(physaddr);
976 /* ebde count includes the response bde and data bpl */
977 iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
978 } else {
979 /* ebde count includes the response bde and data bdes */
980 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
981 }
982 } else {
983 iocb_cmd->un.fcpi64.bdl.bdeSize =
984 ((num_bde + 2) * sizeof(struct ulp_bde64));
985 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
986 }
987 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
988
989 /*
990 * Due to difference in data length between DIF/non-DIF paths,
991 * we need to set word 4 of IOCB here
992 */
993 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
994 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
995 return 0;
996 }
997
998 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
999
1000 /* Return BG_ERR_INIT if error injection is detected by Initiator */
1001 #define BG_ERR_INIT 0x1
1002 /* Return BG_ERR_TGT if error injection is detected by Target */
1003 #define BG_ERR_TGT 0x2
1004 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1005 #define BG_ERR_SWAP 0x10
1006 /*
1007 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
1008 * error injection
1009 */
1010 #define BG_ERR_CHECK 0x20
1011
1012 /**
1013 * lpfc_bg_err_inject - Determine if we should inject an error
1014 * @phba: The Hba for which this call is being executed.
1015 * @sc: The SCSI command to examine
1016 * @reftag: (out) BlockGuard reference tag for transmitted data
1017 * @apptag: (out) BlockGuard application tag for transmitted data
1018 * @new_guard: (in) Value to replace CRC with if needed
1019 *
1020 * Returns BG_ERR_* bit mask or 0 if request ignored
1021 **/
1022 static int
lpfc_bg_err_inject(struct lpfc_hba * phba,struct scsi_cmnd * sc,uint32_t * reftag,uint16_t * apptag,uint32_t new_guard)1023 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1024 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1025 {
1026 struct scatterlist *sgpe; /* s/g prot entry */
1027 struct lpfc_io_buf *lpfc_cmd = NULL;
1028 struct scsi_dif_tuple *src = NULL;
1029 struct lpfc_nodelist *ndlp;
1030 struct lpfc_rport_data *rdata;
1031 uint32_t op = scsi_get_prot_op(sc);
1032 uint32_t blksize;
1033 uint32_t numblks;
1034 u32 lba;
1035 int rc = 0;
1036 int blockoff = 0;
1037
1038 if (op == SCSI_PROT_NORMAL)
1039 return 0;
1040
1041 sgpe = scsi_prot_sglist(sc);
1042 lba = scsi_prot_ref_tag(sc);
1043
1044 /* First check if we need to match the LBA */
1045 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1046 blksize = scsi_prot_interval(sc);
1047 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1048
1049 /* Make sure we have the right LBA if one is specified */
1050 if (phba->lpfc_injerr_lba < (u64)lba ||
1051 (phba->lpfc_injerr_lba >= (u64)(lba + numblks)))
1052 return 0;
1053 if (sgpe) {
1054 blockoff = phba->lpfc_injerr_lba - (u64)lba;
1055 numblks = sg_dma_len(sgpe) /
1056 sizeof(struct scsi_dif_tuple);
1057 if (numblks < blockoff)
1058 blockoff = numblks;
1059 }
1060 }
1061
1062 /* Next check if we need to match the remote NPortID or WWPN */
1063 rdata = lpfc_rport_data_from_scsi_device(sc->device);
1064 if (rdata && rdata->pnode) {
1065 ndlp = rdata->pnode;
1066
1067 /* Make sure we have the right NPortID if one is specified */
1068 if (phba->lpfc_injerr_nportid &&
1069 (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1070 return 0;
1071
1072 /*
1073 * Make sure we have the right WWPN if one is specified.
1074 * wwn[0] should be a non-zero NAA in a good WWPN.
1075 */
1076 if (phba->lpfc_injerr_wwpn.u.wwn[0] &&
1077 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1078 sizeof(struct lpfc_name)) != 0))
1079 return 0;
1080 }
1081
1082 /* Setup a ptr to the protection data if the SCSI host provides it */
1083 if (sgpe) {
1084 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1085 src += blockoff;
1086 lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble;
1087 }
1088
1089 /* Should we change the Reference Tag */
1090 if (reftag) {
1091 if (phba->lpfc_injerr_wref_cnt) {
1092 switch (op) {
1093 case SCSI_PROT_WRITE_PASS:
1094 if (src) {
1095 /*
1096 * For WRITE_PASS, force the error
1097 * to be sent on the wire. It should
1098 * be detected by the Target.
1099 * If blockoff != 0 error will be
1100 * inserted in middle of the IO.
1101 */
1102
1103 lpfc_printf_log(phba, KERN_ERR,
1104 LOG_TRACE_EVENT,
1105 "9076 BLKGRD: Injecting reftag error: "
1106 "write lba x%lx + x%x oldrefTag x%x\n",
1107 (unsigned long)lba, blockoff,
1108 be32_to_cpu(src->ref_tag));
1109
1110 /*
1111 * Save the old ref_tag so we can
1112 * restore it on completion.
1113 */
1114 if (lpfc_cmd) {
1115 lpfc_cmd->prot_data_type =
1116 LPFC_INJERR_REFTAG;
1117 lpfc_cmd->prot_data_segment =
1118 src;
1119 lpfc_cmd->prot_data =
1120 src->ref_tag;
1121 }
1122 src->ref_tag = cpu_to_be32(0xDEADBEEF);
1123 phba->lpfc_injerr_wref_cnt--;
1124 if (phba->lpfc_injerr_wref_cnt == 0) {
1125 phba->lpfc_injerr_nportid = 0;
1126 phba->lpfc_injerr_lba =
1127 LPFC_INJERR_LBA_OFF;
1128 memset(&phba->lpfc_injerr_wwpn,
1129 0, sizeof(struct lpfc_name));
1130 }
1131 rc = BG_ERR_TGT | BG_ERR_CHECK;
1132
1133 break;
1134 }
1135 fallthrough;
1136 case SCSI_PROT_WRITE_INSERT:
1137 /*
1138 * For WRITE_INSERT, force the error
1139 * to be sent on the wire. It should be
1140 * detected by the Target.
1141 */
1142 /* DEADBEEF will be the reftag on the wire */
1143 *reftag = 0xDEADBEEF;
1144 phba->lpfc_injerr_wref_cnt--;
1145 if (phba->lpfc_injerr_wref_cnt == 0) {
1146 phba->lpfc_injerr_nportid = 0;
1147 phba->lpfc_injerr_lba =
1148 LPFC_INJERR_LBA_OFF;
1149 memset(&phba->lpfc_injerr_wwpn,
1150 0, sizeof(struct lpfc_name));
1151 }
1152 rc = BG_ERR_TGT | BG_ERR_CHECK;
1153
1154 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1155 "9078 BLKGRD: Injecting reftag error: "
1156 "write lba x%lx\n", (unsigned long)lba);
1157 break;
1158 case SCSI_PROT_WRITE_STRIP:
1159 /*
1160 * For WRITE_STRIP and WRITE_PASS,
1161 * force the error on data
1162 * being copied from SLI-Host to SLI-Port.
1163 */
1164 *reftag = 0xDEADBEEF;
1165 phba->lpfc_injerr_wref_cnt--;
1166 if (phba->lpfc_injerr_wref_cnt == 0) {
1167 phba->lpfc_injerr_nportid = 0;
1168 phba->lpfc_injerr_lba =
1169 LPFC_INJERR_LBA_OFF;
1170 memset(&phba->lpfc_injerr_wwpn,
1171 0, sizeof(struct lpfc_name));
1172 }
1173 rc = BG_ERR_INIT;
1174
1175 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1176 "9077 BLKGRD: Injecting reftag error: "
1177 "write lba x%lx\n", (unsigned long)lba);
1178 break;
1179 }
1180 }
1181 if (phba->lpfc_injerr_rref_cnt) {
1182 switch (op) {
1183 case SCSI_PROT_READ_INSERT:
1184 case SCSI_PROT_READ_STRIP:
1185 case SCSI_PROT_READ_PASS:
1186 /*
1187 * For READ_STRIP and READ_PASS, force the
1188 * error on data being read off the wire. It
1189 * should force an IO error to the driver.
1190 */
1191 *reftag = 0xDEADBEEF;
1192 phba->lpfc_injerr_rref_cnt--;
1193 if (phba->lpfc_injerr_rref_cnt == 0) {
1194 phba->lpfc_injerr_nportid = 0;
1195 phba->lpfc_injerr_lba =
1196 LPFC_INJERR_LBA_OFF;
1197 memset(&phba->lpfc_injerr_wwpn,
1198 0, sizeof(struct lpfc_name));
1199 }
1200 rc = BG_ERR_INIT;
1201
1202 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1203 "9079 BLKGRD: Injecting reftag error: "
1204 "read lba x%lx\n", (unsigned long)lba);
1205 break;
1206 }
1207 }
1208 }
1209
1210 /* Should we change the Application Tag */
1211 if (apptag) {
1212 if (phba->lpfc_injerr_wapp_cnt) {
1213 switch (op) {
1214 case SCSI_PROT_WRITE_PASS:
1215 if (src) {
1216 /*
1217 * For WRITE_PASS, force the error
1218 * to be sent on the wire. It should
1219 * be detected by the Target.
1220 * If blockoff != 0 error will be
1221 * inserted in middle of the IO.
1222 */
1223
1224 lpfc_printf_log(phba, KERN_ERR,
1225 LOG_TRACE_EVENT,
1226 "9080 BLKGRD: Injecting apptag error: "
1227 "write lba x%lx + x%x oldappTag x%x\n",
1228 (unsigned long)lba, blockoff,
1229 be16_to_cpu(src->app_tag));
1230
1231 /*
1232 * Save the old app_tag so we can
1233 * restore it on completion.
1234 */
1235 if (lpfc_cmd) {
1236 lpfc_cmd->prot_data_type =
1237 LPFC_INJERR_APPTAG;
1238 lpfc_cmd->prot_data_segment =
1239 src;
1240 lpfc_cmd->prot_data =
1241 src->app_tag;
1242 }
1243 src->app_tag = cpu_to_be16(0xDEAD);
1244 phba->lpfc_injerr_wapp_cnt--;
1245 if (phba->lpfc_injerr_wapp_cnt == 0) {
1246 phba->lpfc_injerr_nportid = 0;
1247 phba->lpfc_injerr_lba =
1248 LPFC_INJERR_LBA_OFF;
1249 memset(&phba->lpfc_injerr_wwpn,
1250 0, sizeof(struct lpfc_name));
1251 }
1252 rc = BG_ERR_TGT | BG_ERR_CHECK;
1253 break;
1254 }
1255 fallthrough;
1256 case SCSI_PROT_WRITE_INSERT:
1257 /*
1258 * For WRITE_INSERT, force the
1259 * error to be sent on the wire. It should be
1260 * detected by the Target.
1261 */
1262 /* DEAD will be the apptag on the wire */
1263 *apptag = 0xDEAD;
1264 phba->lpfc_injerr_wapp_cnt--;
1265 if (phba->lpfc_injerr_wapp_cnt == 0) {
1266 phba->lpfc_injerr_nportid = 0;
1267 phba->lpfc_injerr_lba =
1268 LPFC_INJERR_LBA_OFF;
1269 memset(&phba->lpfc_injerr_wwpn,
1270 0, sizeof(struct lpfc_name));
1271 }
1272 rc = BG_ERR_TGT | BG_ERR_CHECK;
1273
1274 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1275 "0813 BLKGRD: Injecting apptag error: "
1276 "write lba x%lx\n", (unsigned long)lba);
1277 break;
1278 case SCSI_PROT_WRITE_STRIP:
1279 /*
1280 * For WRITE_STRIP and WRITE_PASS,
1281 * force the error on data
1282 * being copied from SLI-Host to SLI-Port.
1283 */
1284 *apptag = 0xDEAD;
1285 phba->lpfc_injerr_wapp_cnt--;
1286 if (phba->lpfc_injerr_wapp_cnt == 0) {
1287 phba->lpfc_injerr_nportid = 0;
1288 phba->lpfc_injerr_lba =
1289 LPFC_INJERR_LBA_OFF;
1290 memset(&phba->lpfc_injerr_wwpn,
1291 0, sizeof(struct lpfc_name));
1292 }
1293 rc = BG_ERR_INIT;
1294
1295 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1296 "0812 BLKGRD: Injecting apptag error: "
1297 "write lba x%lx\n", (unsigned long)lba);
1298 break;
1299 }
1300 }
1301 if (phba->lpfc_injerr_rapp_cnt) {
1302 switch (op) {
1303 case SCSI_PROT_READ_INSERT:
1304 case SCSI_PROT_READ_STRIP:
1305 case SCSI_PROT_READ_PASS:
1306 /*
1307 * For READ_STRIP and READ_PASS, force the
1308 * error on data being read off the wire. It
1309 * should force an IO error to the driver.
1310 */
1311 *apptag = 0xDEAD;
1312 phba->lpfc_injerr_rapp_cnt--;
1313 if (phba->lpfc_injerr_rapp_cnt == 0) {
1314 phba->lpfc_injerr_nportid = 0;
1315 phba->lpfc_injerr_lba =
1316 LPFC_INJERR_LBA_OFF;
1317 memset(&phba->lpfc_injerr_wwpn,
1318 0, sizeof(struct lpfc_name));
1319 }
1320 rc = BG_ERR_INIT;
1321
1322 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1323 "0814 BLKGRD: Injecting apptag error: "
1324 "read lba x%lx\n", (unsigned long)lba);
1325 break;
1326 }
1327 }
1328 }
1329
1330
1331 /* Should we change the Guard Tag */
1332 if (new_guard) {
1333 if (phba->lpfc_injerr_wgrd_cnt) {
1334 switch (op) {
1335 case SCSI_PROT_WRITE_PASS:
1336 rc = BG_ERR_CHECK;
1337 fallthrough;
1338
1339 case SCSI_PROT_WRITE_INSERT:
1340 /*
1341 * For WRITE_INSERT, force the
1342 * error to be sent on the wire. It should be
1343 * detected by the Target.
1344 */
1345 phba->lpfc_injerr_wgrd_cnt--;
1346 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1347 phba->lpfc_injerr_nportid = 0;
1348 phba->lpfc_injerr_lba =
1349 LPFC_INJERR_LBA_OFF;
1350 memset(&phba->lpfc_injerr_wwpn,
1351 0, sizeof(struct lpfc_name));
1352 }
1353
1354 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1355 /* Signals the caller to swap CRC->CSUM */
1356
1357 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1358 "0817 BLKGRD: Injecting guard error: "
1359 "write lba x%lx\n", (unsigned long)lba);
1360 break;
1361 case SCSI_PROT_WRITE_STRIP:
1362 /*
1363 * For WRITE_STRIP and WRITE_PASS,
1364 * force the error on data
1365 * being copied from SLI-Host to SLI-Port.
1366 */
1367 phba->lpfc_injerr_wgrd_cnt--;
1368 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1369 phba->lpfc_injerr_nportid = 0;
1370 phba->lpfc_injerr_lba =
1371 LPFC_INJERR_LBA_OFF;
1372 memset(&phba->lpfc_injerr_wwpn,
1373 0, sizeof(struct lpfc_name));
1374 }
1375
1376 rc = BG_ERR_INIT | BG_ERR_SWAP;
1377 /* Signals the caller to swap CRC->CSUM */
1378
1379 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1380 "0816 BLKGRD: Injecting guard error: "
1381 "write lba x%lx\n", (unsigned long)lba);
1382 break;
1383 }
1384 }
1385 if (phba->lpfc_injerr_rgrd_cnt) {
1386 switch (op) {
1387 case SCSI_PROT_READ_INSERT:
1388 case SCSI_PROT_READ_STRIP:
1389 case SCSI_PROT_READ_PASS:
1390 /*
1391 * For READ_STRIP and READ_PASS, force the
1392 * error on data being read off the wire. It
1393 * should force an IO error to the driver.
1394 */
1395 phba->lpfc_injerr_rgrd_cnt--;
1396 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1397 phba->lpfc_injerr_nportid = 0;
1398 phba->lpfc_injerr_lba =
1399 LPFC_INJERR_LBA_OFF;
1400 memset(&phba->lpfc_injerr_wwpn,
1401 0, sizeof(struct lpfc_name));
1402 }
1403
1404 rc = BG_ERR_INIT | BG_ERR_SWAP;
1405 /* Signals the caller to swap CRC->CSUM */
1406
1407 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1408 "0818 BLKGRD: Injecting guard error: "
1409 "read lba x%lx\n", (unsigned long)lba);
1410 }
1411 }
1412 }
1413
1414 return rc;
1415 }
1416 #endif
1417
1418 /**
1419 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1420 * the specified SCSI command.
1421 * @phba: The Hba for which this call is being executed.
1422 * @sc: The SCSI command to examine
1423 * @txop: (out) BlockGuard operation for transmitted data
1424 * @rxop: (out) BlockGuard operation for received data
1425 *
1426 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1427 *
1428 **/
1429 static int
lpfc_sc_to_bg_opcodes(struct lpfc_hba * phba,struct scsi_cmnd * sc,uint8_t * txop,uint8_t * rxop)1430 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1431 uint8_t *txop, uint8_t *rxop)
1432 {
1433 uint8_t ret = 0;
1434
1435 if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) {
1436 switch (scsi_get_prot_op(sc)) {
1437 case SCSI_PROT_READ_INSERT:
1438 case SCSI_PROT_WRITE_STRIP:
1439 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1440 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1441 break;
1442
1443 case SCSI_PROT_READ_STRIP:
1444 case SCSI_PROT_WRITE_INSERT:
1445 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1446 *txop = BG_OP_IN_NODIF_OUT_CRC;
1447 break;
1448
1449 case SCSI_PROT_READ_PASS:
1450 case SCSI_PROT_WRITE_PASS:
1451 *rxop = BG_OP_IN_CRC_OUT_CSUM;
1452 *txop = BG_OP_IN_CSUM_OUT_CRC;
1453 break;
1454
1455 case SCSI_PROT_NORMAL:
1456 default:
1457 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1458 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1459 scsi_get_prot_op(sc));
1460 ret = 1;
1461 break;
1462
1463 }
1464 } else {
1465 switch (scsi_get_prot_op(sc)) {
1466 case SCSI_PROT_READ_STRIP:
1467 case SCSI_PROT_WRITE_INSERT:
1468 *rxop = BG_OP_IN_CRC_OUT_NODIF;
1469 *txop = BG_OP_IN_NODIF_OUT_CRC;
1470 break;
1471
1472 case SCSI_PROT_READ_PASS:
1473 case SCSI_PROT_WRITE_PASS:
1474 *rxop = BG_OP_IN_CRC_OUT_CRC;
1475 *txop = BG_OP_IN_CRC_OUT_CRC;
1476 break;
1477
1478 case SCSI_PROT_READ_INSERT:
1479 case SCSI_PROT_WRITE_STRIP:
1480 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1481 *txop = BG_OP_IN_CRC_OUT_NODIF;
1482 break;
1483
1484 case SCSI_PROT_NORMAL:
1485 default:
1486 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1487 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1488 scsi_get_prot_op(sc));
1489 ret = 1;
1490 break;
1491 }
1492 }
1493
1494 return ret;
1495 }
1496
1497 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1498 /**
1499 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1500 * the specified SCSI command in order to force a guard tag error.
1501 * @phba: The Hba for which this call is being executed.
1502 * @sc: The SCSI command to examine
1503 * @txop: (out) BlockGuard operation for transmitted data
1504 * @rxop: (out) BlockGuard operation for received data
1505 *
1506 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1507 *
1508 **/
1509 static int
lpfc_bg_err_opcodes(struct lpfc_hba * phba,struct scsi_cmnd * sc,uint8_t * txop,uint8_t * rxop)1510 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1511 uint8_t *txop, uint8_t *rxop)
1512 {
1513
1514 if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) {
1515 switch (scsi_get_prot_op(sc)) {
1516 case SCSI_PROT_READ_INSERT:
1517 case SCSI_PROT_WRITE_STRIP:
1518 *rxop = BG_OP_IN_NODIF_OUT_CRC;
1519 *txop = BG_OP_IN_CRC_OUT_NODIF;
1520 break;
1521
1522 case SCSI_PROT_READ_STRIP:
1523 case SCSI_PROT_WRITE_INSERT:
1524 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1525 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1526 break;
1527
1528 case SCSI_PROT_READ_PASS:
1529 case SCSI_PROT_WRITE_PASS:
1530 *rxop = BG_OP_IN_CSUM_OUT_CRC;
1531 *txop = BG_OP_IN_CRC_OUT_CSUM;
1532 break;
1533
1534 case SCSI_PROT_NORMAL:
1535 default:
1536 break;
1537
1538 }
1539 } else {
1540 switch (scsi_get_prot_op(sc)) {
1541 case SCSI_PROT_READ_STRIP:
1542 case SCSI_PROT_WRITE_INSERT:
1543 *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1544 *txop = BG_OP_IN_NODIF_OUT_CSUM;
1545 break;
1546
1547 case SCSI_PROT_READ_PASS:
1548 case SCSI_PROT_WRITE_PASS:
1549 *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1550 *txop = BG_OP_IN_CSUM_OUT_CSUM;
1551 break;
1552
1553 case SCSI_PROT_READ_INSERT:
1554 case SCSI_PROT_WRITE_STRIP:
1555 *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1556 *txop = BG_OP_IN_CSUM_OUT_NODIF;
1557 break;
1558
1559 case SCSI_PROT_NORMAL:
1560 default:
1561 break;
1562 }
1563 }
1564
1565 return 0;
1566 }
1567 #endif
1568
1569 /**
1570 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1571 * @phba: The Hba for which this call is being executed.
1572 * @sc: pointer to scsi command we're working on
1573 * @bpl: pointer to buffer list for protection groups
1574 * @datasegcnt: number of segments of data that have been dma mapped
1575 *
1576 * This function sets up BPL buffer list for protection groups of
1577 * type LPFC_PG_TYPE_NO_DIF
1578 *
1579 * This is usually used when the HBA is instructed to generate
1580 * DIFs and insert them into data stream (or strip DIF from
1581 * incoming data stream)
1582 *
1583 * The buffer list consists of just one protection group described
1584 * below:
1585 * +-------------------------+
1586 * start of prot group --> | PDE_5 |
1587 * +-------------------------+
1588 * | PDE_6 |
1589 * +-------------------------+
1590 * | Data BDE |
1591 * +-------------------------+
1592 * |more Data BDE's ... (opt)|
1593 * +-------------------------+
1594 *
1595 *
1596 * Note: Data s/g buffers have been dma mapped
1597 *
1598 * Returns the number of BDEs added to the BPL.
1599 **/
1600 static int
lpfc_bg_setup_bpl(struct lpfc_hba * phba,struct scsi_cmnd * sc,struct ulp_bde64 * bpl,int datasegcnt)1601 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1602 struct ulp_bde64 *bpl, int datasegcnt)
1603 {
1604 struct scatterlist *sgde = NULL; /* s/g data entry */
1605 struct lpfc_pde5 *pde5 = NULL;
1606 struct lpfc_pde6 *pde6 = NULL;
1607 dma_addr_t physaddr;
1608 int i = 0, num_bde = 0, status;
1609 int datadir = sc->sc_data_direction;
1610 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1611 uint32_t rc;
1612 #endif
1613 uint32_t checking = 1;
1614 uint32_t reftag;
1615 uint8_t txop, rxop;
1616
1617 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1618 if (status)
1619 goto out;
1620
1621 /* extract some info from the scsi command for pde*/
1622 reftag = scsi_prot_ref_tag(sc);
1623
1624 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1625 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1626 if (rc) {
1627 if (rc & BG_ERR_SWAP)
1628 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1629 if (rc & BG_ERR_CHECK)
1630 checking = 0;
1631 }
1632 #endif
1633
1634 /* setup PDE5 with what we have */
1635 pde5 = (struct lpfc_pde5 *) bpl;
1636 memset(pde5, 0, sizeof(struct lpfc_pde5));
1637 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1638
1639 /* Endianness conversion if necessary for PDE5 */
1640 pde5->word0 = cpu_to_le32(pde5->word0);
1641 pde5->reftag = cpu_to_le32(reftag);
1642
1643 /* advance bpl and increment bde count */
1644 num_bde++;
1645 bpl++;
1646 pde6 = (struct lpfc_pde6 *) bpl;
1647
1648 /* setup PDE6 with the rest of the info */
1649 memset(pde6, 0, sizeof(struct lpfc_pde6));
1650 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1651 bf_set(pde6_optx, pde6, txop);
1652 bf_set(pde6_oprx, pde6, rxop);
1653
1654 /*
1655 * We only need to check the data on READs, for WRITEs
1656 * protection data is automatically generated, not checked.
1657 */
1658 if (datadir == DMA_FROM_DEVICE) {
1659 if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
1660 bf_set(pde6_ce, pde6, checking);
1661 else
1662 bf_set(pde6_ce, pde6, 0);
1663
1664 if (sc->prot_flags & SCSI_PROT_REF_CHECK)
1665 bf_set(pde6_re, pde6, checking);
1666 else
1667 bf_set(pde6_re, pde6, 0);
1668 }
1669 bf_set(pde6_ai, pde6, 1);
1670 bf_set(pde6_ae, pde6, 0);
1671 bf_set(pde6_apptagval, pde6, 0);
1672
1673 /* Endianness conversion if necessary for PDE6 */
1674 pde6->word0 = cpu_to_le32(pde6->word0);
1675 pde6->word1 = cpu_to_le32(pde6->word1);
1676 pde6->word2 = cpu_to_le32(pde6->word2);
1677
1678 /* advance bpl and increment bde count */
1679 num_bde++;
1680 bpl++;
1681
1682 /* assumption: caller has already run dma_map_sg on command data */
1683 scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1684 physaddr = sg_dma_address(sgde);
1685 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1686 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1687 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1688 if (datadir == DMA_TO_DEVICE)
1689 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1690 else
1691 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1692 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1693 bpl++;
1694 num_bde++;
1695 }
1696
1697 out:
1698 return num_bde;
1699 }
1700
1701 /**
1702 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1703 * @phba: The Hba for which this call is being executed.
1704 * @sc: pointer to scsi command we're working on
1705 * @bpl: pointer to buffer list for protection groups
1706 * @datacnt: number of segments of data that have been dma mapped
1707 * @protcnt: number of segment of protection data that have been dma mapped
1708 *
1709 * This function sets up BPL buffer list for protection groups of
1710 * type LPFC_PG_TYPE_DIF
1711 *
1712 * This is usually used when DIFs are in their own buffers,
1713 * separate from the data. The HBA can then by instructed
1714 * to place the DIFs in the outgoing stream. For read operations,
1715 * The HBA could extract the DIFs and place it in DIF buffers.
1716 *
1717 * The buffer list for this type consists of one or more of the
1718 * protection groups described below:
1719 * +-------------------------+
1720 * start of first prot group --> | PDE_5 |
1721 * +-------------------------+
1722 * | PDE_6 |
1723 * +-------------------------+
1724 * | PDE_7 (Prot BDE) |
1725 * +-------------------------+
1726 * | Data BDE |
1727 * +-------------------------+
1728 * |more Data BDE's ... (opt)|
1729 * +-------------------------+
1730 * start of new prot group --> | PDE_5 |
1731 * +-------------------------+
1732 * | ... |
1733 * +-------------------------+
1734 *
1735 * Note: It is assumed that both data and protection s/g buffers have been
1736 * mapped for DMA
1737 *
1738 * Returns the number of BDEs added to the BPL.
1739 **/
1740 static int
lpfc_bg_setup_bpl_prot(struct lpfc_hba * phba,struct scsi_cmnd * sc,struct ulp_bde64 * bpl,int datacnt,int protcnt)1741 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1742 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1743 {
1744 struct scatterlist *sgde = NULL; /* s/g data entry */
1745 struct scatterlist *sgpe = NULL; /* s/g prot entry */
1746 struct lpfc_pde5 *pde5 = NULL;
1747 struct lpfc_pde6 *pde6 = NULL;
1748 struct lpfc_pde7 *pde7 = NULL;
1749 dma_addr_t dataphysaddr, protphysaddr;
1750 unsigned short curr_data = 0, curr_prot = 0;
1751 unsigned int split_offset;
1752 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1753 unsigned int protgrp_blks, protgrp_bytes;
1754 unsigned int remainder, subtotal;
1755 int status;
1756 int datadir = sc->sc_data_direction;
1757 unsigned char pgdone = 0, alldone = 0;
1758 unsigned blksize;
1759 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1760 uint32_t rc;
1761 #endif
1762 uint32_t checking = 1;
1763 uint32_t reftag;
1764 uint8_t txop, rxop;
1765 int num_bde = 0;
1766
1767 sgpe = scsi_prot_sglist(sc);
1768 sgde = scsi_sglist(sc);
1769
1770 if (!sgpe || !sgde) {
1771 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1772 "9020 Invalid s/g entry: data=x%px prot=x%px\n",
1773 sgpe, sgde);
1774 return 0;
1775 }
1776
1777 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1778 if (status)
1779 goto out;
1780
1781 /* extract some info from the scsi command */
1782 blksize = scsi_prot_interval(sc);
1783 reftag = scsi_prot_ref_tag(sc);
1784
1785 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1786 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1787 if (rc) {
1788 if (rc & BG_ERR_SWAP)
1789 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1790 if (rc & BG_ERR_CHECK)
1791 checking = 0;
1792 }
1793 #endif
1794
1795 split_offset = 0;
1796 do {
1797 /* Check to see if we ran out of space */
1798 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
1799 return num_bde + 3;
1800
1801 /* setup PDE5 with what we have */
1802 pde5 = (struct lpfc_pde5 *) bpl;
1803 memset(pde5, 0, sizeof(struct lpfc_pde5));
1804 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1805
1806 /* Endianness conversion if necessary for PDE5 */
1807 pde5->word0 = cpu_to_le32(pde5->word0);
1808 pde5->reftag = cpu_to_le32(reftag);
1809
1810 /* advance bpl and increment bde count */
1811 num_bde++;
1812 bpl++;
1813 pde6 = (struct lpfc_pde6 *) bpl;
1814
1815 /* setup PDE6 with the rest of the info */
1816 memset(pde6, 0, sizeof(struct lpfc_pde6));
1817 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1818 bf_set(pde6_optx, pde6, txop);
1819 bf_set(pde6_oprx, pde6, rxop);
1820
1821 if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
1822 bf_set(pde6_ce, pde6, checking);
1823 else
1824 bf_set(pde6_ce, pde6, 0);
1825
1826 if (sc->prot_flags & SCSI_PROT_REF_CHECK)
1827 bf_set(pde6_re, pde6, checking);
1828 else
1829 bf_set(pde6_re, pde6, 0);
1830
1831 bf_set(pde6_ai, pde6, 1);
1832 bf_set(pde6_ae, pde6, 0);
1833 bf_set(pde6_apptagval, pde6, 0);
1834
1835 /* Endianness conversion if necessary for PDE6 */
1836 pde6->word0 = cpu_to_le32(pde6->word0);
1837 pde6->word1 = cpu_to_le32(pde6->word1);
1838 pde6->word2 = cpu_to_le32(pde6->word2);
1839
1840 /* advance bpl and increment bde count */
1841 num_bde++;
1842 bpl++;
1843
1844 /* setup the first BDE that points to protection buffer */
1845 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1846 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1847
1848 /* must be integer multiple of the DIF block length */
1849 BUG_ON(protgroup_len % 8);
1850
1851 pde7 = (struct lpfc_pde7 *) bpl;
1852 memset(pde7, 0, sizeof(struct lpfc_pde7));
1853 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1854
1855 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
1856 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
1857
1858 protgrp_blks = protgroup_len / 8;
1859 protgrp_bytes = protgrp_blks * blksize;
1860
1861 /* check if this pde is crossing the 4K boundary; if so split */
1862 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1863 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1864 protgroup_offset += protgroup_remainder;
1865 protgrp_blks = protgroup_remainder / 8;
1866 protgrp_bytes = protgrp_blks * blksize;
1867 } else {
1868 protgroup_offset = 0;
1869 curr_prot++;
1870 }
1871
1872 num_bde++;
1873
1874 /* setup BDE's for data blocks associated with DIF data */
1875 pgdone = 0;
1876 subtotal = 0; /* total bytes processed for current prot grp */
1877 while (!pgdone) {
1878 /* Check to see if we ran out of space */
1879 if (num_bde >= phba->cfg_total_seg_cnt)
1880 return num_bde + 1;
1881
1882 if (!sgde) {
1883 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1884 "9065 BLKGRD:%s Invalid data segment\n",
1885 __func__);
1886 return 0;
1887 }
1888 bpl++;
1889 dataphysaddr = sg_dma_address(sgde) + split_offset;
1890 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1891 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1892
1893 remainder = sg_dma_len(sgde) - split_offset;
1894
1895 if ((subtotal + remainder) <= protgrp_bytes) {
1896 /* we can use this whole buffer */
1897 bpl->tus.f.bdeSize = remainder;
1898 split_offset = 0;
1899
1900 if ((subtotal + remainder) == protgrp_bytes)
1901 pgdone = 1;
1902 } else {
1903 /* must split this buffer with next prot grp */
1904 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1905 split_offset += bpl->tus.f.bdeSize;
1906 }
1907
1908 subtotal += bpl->tus.f.bdeSize;
1909
1910 if (datadir == DMA_TO_DEVICE)
1911 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1912 else
1913 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1914 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1915
1916 num_bde++;
1917 curr_data++;
1918
1919 if (split_offset)
1920 break;
1921
1922 /* Move to the next s/g segment if possible */
1923 sgde = sg_next(sgde);
1924
1925 }
1926
1927 if (protgroup_offset) {
1928 /* update the reference tag */
1929 reftag += protgrp_blks;
1930 bpl++;
1931 continue;
1932 }
1933
1934 /* are we done ? */
1935 if (curr_prot == protcnt) {
1936 alldone = 1;
1937 } else if (curr_prot < protcnt) {
1938 /* advance to next prot buffer */
1939 sgpe = sg_next(sgpe);
1940 bpl++;
1941
1942 /* update the reference tag */
1943 reftag += protgrp_blks;
1944 } else {
1945 /* if we're here, we have a bug */
1946 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1947 "9054 BLKGRD: bug in %s\n", __func__);
1948 }
1949
1950 } while (!alldone);
1951 out:
1952
1953 return num_bde;
1954 }
1955
1956 /**
1957 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
1958 * @phba: The Hba for which this call is being executed.
1959 * @sc: pointer to scsi command we're working on
1960 * @sgl: pointer to buffer list for protection groups
1961 * @datasegcnt: number of segments of data that have been dma mapped
1962 * @lpfc_cmd: lpfc scsi command object pointer.
1963 *
1964 * This function sets up SGL buffer list for protection groups of
1965 * type LPFC_PG_TYPE_NO_DIF
1966 *
1967 * This is usually used when the HBA is instructed to generate
1968 * DIFs and insert them into data stream (or strip DIF from
1969 * incoming data stream)
1970 *
1971 * The buffer list consists of just one protection group described
1972 * below:
1973 * +-------------------------+
1974 * start of prot group --> | DI_SEED |
1975 * +-------------------------+
1976 * | Data SGE |
1977 * +-------------------------+
1978 * |more Data SGE's ... (opt)|
1979 * +-------------------------+
1980 *
1981 *
1982 * Note: Data s/g buffers have been dma mapped
1983 *
1984 * Returns the number of SGEs added to the SGL.
1985 **/
1986 static int
lpfc_bg_setup_sgl(struct lpfc_hba * phba,struct scsi_cmnd * sc,struct sli4_sge * sgl,int datasegcnt,struct lpfc_io_buf * lpfc_cmd)1987 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1988 struct sli4_sge *sgl, int datasegcnt,
1989 struct lpfc_io_buf *lpfc_cmd)
1990 {
1991 struct scatterlist *sgde = NULL; /* s/g data entry */
1992 struct sli4_sge_diseed *diseed = NULL;
1993 dma_addr_t physaddr;
1994 int i = 0, num_sge = 0, status;
1995 uint32_t reftag;
1996 uint8_t txop, rxop;
1997 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1998 uint32_t rc;
1999 #endif
2000 uint32_t checking = 1;
2001 uint32_t dma_len;
2002 uint32_t dma_offset = 0;
2003 struct sli4_hybrid_sgl *sgl_xtra = NULL;
2004 int j;
2005 bool lsp_just_set = false;
2006
2007 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2008 if (status)
2009 goto out;
2010
2011 /* extract some info from the scsi command for pde*/
2012 reftag = scsi_prot_ref_tag(sc);
2013
2014 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2015 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2016 if (rc) {
2017 if (rc & BG_ERR_SWAP)
2018 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2019 if (rc & BG_ERR_CHECK)
2020 checking = 0;
2021 }
2022 #endif
2023
2024 /* setup DISEED with what we have */
2025 diseed = (struct sli4_sge_diseed *) sgl;
2026 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2027 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2028
2029 /* Endianness conversion if necessary */
2030 diseed->ref_tag = cpu_to_le32(reftag);
2031 diseed->ref_tag_tran = diseed->ref_tag;
2032
2033 /*
2034 * We only need to check the data on READs, for WRITEs
2035 * protection data is automatically generated, not checked.
2036 */
2037 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2038 if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
2039 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2040 else
2041 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2042
2043 if (sc->prot_flags & SCSI_PROT_REF_CHECK)
2044 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2045 else
2046 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2047 }
2048
2049 /* setup DISEED with the rest of the info */
2050 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2051 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2052
2053 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2054 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2055
2056 /* Endianness conversion if necessary for DISEED */
2057 diseed->word2 = cpu_to_le32(diseed->word2);
2058 diseed->word3 = cpu_to_le32(diseed->word3);
2059
2060 /* advance bpl and increment sge count */
2061 num_sge++;
2062 sgl++;
2063
2064 /* assumption: caller has already run dma_map_sg on command data */
2065 sgde = scsi_sglist(sc);
2066 j = 3;
2067 for (i = 0; i < datasegcnt; i++) {
2068 /* clear it */
2069 sgl->word2 = 0;
2070
2071 /* do we need to expand the segment */
2072 if (!lsp_just_set && !((j + 1) % phba->border_sge_num) &&
2073 ((datasegcnt - 1) != i)) {
2074 /* set LSP type */
2075 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2076
2077 sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2078
2079 if (unlikely(!sgl_xtra)) {
2080 lpfc_cmd->seg_cnt = 0;
2081 return 0;
2082 }
2083 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2084 sgl_xtra->dma_phys_sgl));
2085 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2086 sgl_xtra->dma_phys_sgl));
2087
2088 } else {
2089 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2090 }
2091
2092 if (!(bf_get(lpfc_sli4_sge_type, sgl) & LPFC_SGE_TYPE_LSP)) {
2093 if ((datasegcnt - 1) == i)
2094 bf_set(lpfc_sli4_sge_last, sgl, 1);
2095 physaddr = sg_dma_address(sgde);
2096 dma_len = sg_dma_len(sgde);
2097 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2098 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2099
2100 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2101 sgl->word2 = cpu_to_le32(sgl->word2);
2102 sgl->sge_len = cpu_to_le32(dma_len);
2103
2104 dma_offset += dma_len;
2105 sgde = sg_next(sgde);
2106
2107 sgl++;
2108 num_sge++;
2109 lsp_just_set = false;
2110
2111 } else {
2112 sgl->word2 = cpu_to_le32(sgl->word2);
2113 sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2114
2115 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2116 i = i - 1;
2117
2118 lsp_just_set = true;
2119 }
2120
2121 j++;
2122
2123 }
2124
2125 out:
2126 return num_sge;
2127 }
2128
2129 /**
2130 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2131 * @phba: The Hba for which this call is being executed.
2132 * @sc: pointer to scsi command we're working on
2133 * @sgl: pointer to buffer list for protection groups
2134 * @datacnt: number of segments of data that have been dma mapped
2135 * @protcnt: number of segment of protection data that have been dma mapped
2136 * @lpfc_cmd: lpfc scsi command object pointer.
2137 *
2138 * This function sets up SGL buffer list for protection groups of
2139 * type LPFC_PG_TYPE_DIF
2140 *
2141 * This is usually used when DIFs are in their own buffers,
2142 * separate from the data. The HBA can then by instructed
2143 * to place the DIFs in the outgoing stream. For read operations,
2144 * The HBA could extract the DIFs and place it in DIF buffers.
2145 *
2146 * The buffer list for this type consists of one or more of the
2147 * protection groups described below:
2148 * +-------------------------+
2149 * start of first prot group --> | DISEED |
2150 * +-------------------------+
2151 * | DIF (Prot SGE) |
2152 * +-------------------------+
2153 * | Data SGE |
2154 * +-------------------------+
2155 * |more Data SGE's ... (opt)|
2156 * +-------------------------+
2157 * start of new prot group --> | DISEED |
2158 * +-------------------------+
2159 * | ... |
2160 * +-------------------------+
2161 *
2162 * Note: It is assumed that both data and protection s/g buffers have been
2163 * mapped for DMA
2164 *
2165 * Returns the number of SGEs added to the SGL.
2166 **/
2167 static int
lpfc_bg_setup_sgl_prot(struct lpfc_hba * phba,struct scsi_cmnd * sc,struct sli4_sge * sgl,int datacnt,int protcnt,struct lpfc_io_buf * lpfc_cmd)2168 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2169 struct sli4_sge *sgl, int datacnt, int protcnt,
2170 struct lpfc_io_buf *lpfc_cmd)
2171 {
2172 struct scatterlist *sgde = NULL; /* s/g data entry */
2173 struct scatterlist *sgpe = NULL; /* s/g prot entry */
2174 struct sli4_sge_diseed *diseed = NULL;
2175 dma_addr_t dataphysaddr, protphysaddr;
2176 unsigned short curr_data = 0, curr_prot = 0;
2177 unsigned int split_offset;
2178 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2179 unsigned int protgrp_blks, protgrp_bytes;
2180 unsigned int remainder, subtotal;
2181 int status;
2182 unsigned char pgdone = 0, alldone = 0;
2183 unsigned blksize;
2184 uint32_t reftag;
2185 uint8_t txop, rxop;
2186 uint32_t dma_len;
2187 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2188 uint32_t rc;
2189 #endif
2190 uint32_t checking = 1;
2191 uint32_t dma_offset = 0;
2192 int num_sge = 0, j = 2;
2193 struct sli4_hybrid_sgl *sgl_xtra = NULL;
2194
2195 sgpe = scsi_prot_sglist(sc);
2196 sgde = scsi_sglist(sc);
2197
2198 if (!sgpe || !sgde) {
2199 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2200 "9082 Invalid s/g entry: data=x%px prot=x%px\n",
2201 sgpe, sgde);
2202 return 0;
2203 }
2204
2205 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2206 if (status)
2207 goto out;
2208
2209 /* extract some info from the scsi command */
2210 blksize = scsi_prot_interval(sc);
2211 reftag = scsi_prot_ref_tag(sc);
2212
2213 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2214 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2215 if (rc) {
2216 if (rc & BG_ERR_SWAP)
2217 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2218 if (rc & BG_ERR_CHECK)
2219 checking = 0;
2220 }
2221 #endif
2222
2223 split_offset = 0;
2224 do {
2225 /* Check to see if we ran out of space */
2226 if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) &&
2227 !(phba->cfg_xpsgl))
2228 return num_sge + 3;
2229
2230 /* DISEED and DIF have to be together */
2231 if (!((j + 1) % phba->border_sge_num) ||
2232 !((j + 2) % phba->border_sge_num) ||
2233 !((j + 3) % phba->border_sge_num)) {
2234 sgl->word2 = 0;
2235
2236 /* set LSP type */
2237 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2238
2239 sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2240
2241 if (unlikely(!sgl_xtra)) {
2242 goto out;
2243 } else {
2244 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2245 sgl_xtra->dma_phys_sgl));
2246 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2247 sgl_xtra->dma_phys_sgl));
2248 }
2249
2250 sgl->word2 = cpu_to_le32(sgl->word2);
2251 sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2252
2253 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2254 j = 0;
2255 }
2256
2257 /* setup DISEED with what we have */
2258 diseed = (struct sli4_sge_diseed *) sgl;
2259 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2260 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2261
2262 /* Endianness conversion if necessary */
2263 diseed->ref_tag = cpu_to_le32(reftag);
2264 diseed->ref_tag_tran = diseed->ref_tag;
2265
2266 if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) {
2267 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2268 } else {
2269 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2270 /*
2271 * When in this mode, the hardware will replace
2272 * the guard tag from the host with a
2273 * newly generated good CRC for the wire.
2274 * Switch to raw mode here to avoid this
2275 * behavior. What the host sends gets put on the wire.
2276 */
2277 if (txop == BG_OP_IN_CRC_OUT_CRC) {
2278 txop = BG_OP_RAW_MODE;
2279 rxop = BG_OP_RAW_MODE;
2280 }
2281 }
2282
2283
2284 if (sc->prot_flags & SCSI_PROT_REF_CHECK)
2285 bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2286 else
2287 bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2288
2289 /* setup DISEED with the rest of the info */
2290 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2291 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2292
2293 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2294 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2295
2296 /* Endianness conversion if necessary for DISEED */
2297 diseed->word2 = cpu_to_le32(diseed->word2);
2298 diseed->word3 = cpu_to_le32(diseed->word3);
2299
2300 /* advance sgl and increment bde count */
2301 num_sge++;
2302
2303 sgl++;
2304 j++;
2305
2306 /* setup the first BDE that points to protection buffer */
2307 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2308 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2309
2310 /* must be integer multiple of the DIF block length */
2311 BUG_ON(protgroup_len % 8);
2312
2313 /* Now setup DIF SGE */
2314 sgl->word2 = 0;
2315 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2316 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2317 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2318 sgl->word2 = cpu_to_le32(sgl->word2);
2319 sgl->sge_len = 0;
2320
2321 protgrp_blks = protgroup_len / 8;
2322 protgrp_bytes = protgrp_blks * blksize;
2323
2324 /* check if DIF SGE is crossing the 4K boundary; if so split */
2325 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2326 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2327 protgroup_offset += protgroup_remainder;
2328 protgrp_blks = protgroup_remainder / 8;
2329 protgrp_bytes = protgrp_blks * blksize;
2330 } else {
2331 protgroup_offset = 0;
2332 curr_prot++;
2333 }
2334
2335 num_sge++;
2336
2337 /* setup SGE's for data blocks associated with DIF data */
2338 pgdone = 0;
2339 subtotal = 0; /* total bytes processed for current prot grp */
2340
2341 sgl++;
2342 j++;
2343
2344 while (!pgdone) {
2345 /* Check to see if we ran out of space */
2346 if ((num_sge >= phba->cfg_total_seg_cnt) &&
2347 !phba->cfg_xpsgl)
2348 return num_sge + 1;
2349
2350 if (!sgde) {
2351 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2352 "9086 BLKGRD:%s Invalid data segment\n",
2353 __func__);
2354 return 0;
2355 }
2356
2357 if (!((j + 1) % phba->border_sge_num)) {
2358 sgl->word2 = 0;
2359
2360 /* set LSP type */
2361 bf_set(lpfc_sli4_sge_type, sgl,
2362 LPFC_SGE_TYPE_LSP);
2363
2364 sgl_xtra = lpfc_get_sgl_per_hdwq(phba,
2365 lpfc_cmd);
2366
2367 if (unlikely(!sgl_xtra)) {
2368 goto out;
2369 } else {
2370 sgl->addr_lo = cpu_to_le32(
2371 putPaddrLow(sgl_xtra->dma_phys_sgl));
2372 sgl->addr_hi = cpu_to_le32(
2373 putPaddrHigh(sgl_xtra->dma_phys_sgl));
2374 }
2375
2376 sgl->word2 = cpu_to_le32(sgl->word2);
2377 sgl->sge_len = cpu_to_le32(
2378 phba->cfg_sg_dma_buf_size);
2379
2380 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2381 } else {
2382 dataphysaddr = sg_dma_address(sgde) +
2383 split_offset;
2384
2385 remainder = sg_dma_len(sgde) - split_offset;
2386
2387 if ((subtotal + remainder) <= protgrp_bytes) {
2388 /* we can use this whole buffer */
2389 dma_len = remainder;
2390 split_offset = 0;
2391
2392 if ((subtotal + remainder) ==
2393 protgrp_bytes)
2394 pgdone = 1;
2395 } else {
2396 /* must split this buffer with next
2397 * prot grp
2398 */
2399 dma_len = protgrp_bytes - subtotal;
2400 split_offset += dma_len;
2401 }
2402
2403 subtotal += dma_len;
2404
2405 sgl->word2 = 0;
2406 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2407 dataphysaddr));
2408 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2409 dataphysaddr));
2410 bf_set(lpfc_sli4_sge_last, sgl, 0);
2411 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2412 bf_set(lpfc_sli4_sge_type, sgl,
2413 LPFC_SGE_TYPE_DATA);
2414
2415 sgl->sge_len = cpu_to_le32(dma_len);
2416 dma_offset += dma_len;
2417
2418 num_sge++;
2419 curr_data++;
2420
2421 if (split_offset) {
2422 sgl++;
2423 j++;
2424 break;
2425 }
2426
2427 /* Move to the next s/g segment if possible */
2428 sgde = sg_next(sgde);
2429
2430 sgl++;
2431 }
2432
2433 j++;
2434 }
2435
2436 if (protgroup_offset) {
2437 /* update the reference tag */
2438 reftag += protgrp_blks;
2439 continue;
2440 }
2441
2442 /* are we done ? */
2443 if (curr_prot == protcnt) {
2444 /* mark the last SGL */
2445 sgl--;
2446 bf_set(lpfc_sli4_sge_last, sgl, 1);
2447 alldone = 1;
2448 } else if (curr_prot < protcnt) {
2449 /* advance to next prot buffer */
2450 sgpe = sg_next(sgpe);
2451
2452 /* update the reference tag */
2453 reftag += protgrp_blks;
2454 } else {
2455 /* if we're here, we have a bug */
2456 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2457 "9085 BLKGRD: bug in %s\n", __func__);
2458 }
2459
2460 } while (!alldone);
2461
2462 out:
2463
2464 return num_sge;
2465 }
2466
2467 /**
2468 * lpfc_prot_group_type - Get prtotection group type of SCSI command
2469 * @phba: The Hba for which this call is being executed.
2470 * @sc: pointer to scsi command we're working on
2471 *
2472 * Given a SCSI command that supports DIF, determine composition of protection
2473 * groups involved in setting up buffer lists
2474 *
2475 * Returns: Protection group type (with or without DIF)
2476 *
2477 **/
2478 static int
lpfc_prot_group_type(struct lpfc_hba * phba,struct scsi_cmnd * sc)2479 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2480 {
2481 int ret = LPFC_PG_TYPE_INVALID;
2482 unsigned char op = scsi_get_prot_op(sc);
2483
2484 switch (op) {
2485 case SCSI_PROT_READ_STRIP:
2486 case SCSI_PROT_WRITE_INSERT:
2487 ret = LPFC_PG_TYPE_NO_DIF;
2488 break;
2489 case SCSI_PROT_READ_INSERT:
2490 case SCSI_PROT_WRITE_STRIP:
2491 case SCSI_PROT_READ_PASS:
2492 case SCSI_PROT_WRITE_PASS:
2493 ret = LPFC_PG_TYPE_DIF_BUF;
2494 break;
2495 default:
2496 if (phba)
2497 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2498 "9021 Unsupported protection op:%d\n",
2499 op);
2500 break;
2501 }
2502 return ret;
2503 }
2504
2505 /**
2506 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2507 * @phba: The Hba for which this call is being executed.
2508 * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2509 *
2510 * Adjust the data length to account for how much data
2511 * is actually on the wire.
2512 *
2513 * returns the adjusted data length
2514 **/
2515 static int
lpfc_bg_scsi_adjust_dl(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)2516 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2517 struct lpfc_io_buf *lpfc_cmd)
2518 {
2519 struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2520 int fcpdl;
2521
2522 fcpdl = scsi_bufflen(sc);
2523
2524 /* Check if there is protection data on the wire */
2525 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2526 /* Read check for protection data */
2527 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT)
2528 return fcpdl;
2529
2530 } else {
2531 /* Write check for protection data */
2532 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP)
2533 return fcpdl;
2534 }
2535
2536 /*
2537 * If we are in DIF Type 1 mode every data block has a 8 byte
2538 * DIF (trailer) attached to it. Must ajust FCP data length
2539 * to account for the protection data.
2540 */
2541 fcpdl += (fcpdl / scsi_prot_interval(sc)) * 8;
2542
2543 return fcpdl;
2544 }
2545
2546 /**
2547 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2548 * @phba: The Hba for which this call is being executed.
2549 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2550 *
2551 * This is the protection/DIF aware version of
2552 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2553 * two functions eventually, but for now, it's here.
2554 * RETURNS 0 - SUCCESS,
2555 * 1 - Failed DMA map, retry.
2556 * 2 - Invalid scsi cmd or prot-type. Do not rety.
2557 **/
2558 static int
lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)2559 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2560 struct lpfc_io_buf *lpfc_cmd)
2561 {
2562 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2563 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2564 struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
2565 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2566 uint32_t num_bde = 0;
2567 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2568 int prot_group_type = 0;
2569 int fcpdl;
2570 int ret = 1;
2571 struct lpfc_vport *vport = phba->pport;
2572
2573 /*
2574 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2575 * fcp_rsp regions to the first data bde entry
2576 */
2577 bpl += 2;
2578 if (scsi_sg_count(scsi_cmnd)) {
2579 /*
2580 * The driver stores the segment count returned from pci_map_sg
2581 * because this a count of dma-mappings used to map the use_sg
2582 * pages. They are not guaranteed to be the same for those
2583 * architectures that implement an IOMMU.
2584 */
2585 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2586 scsi_sglist(scsi_cmnd),
2587 scsi_sg_count(scsi_cmnd), datadir);
2588 if (unlikely(!datasegcnt))
2589 return 1;
2590
2591 lpfc_cmd->seg_cnt = datasegcnt;
2592
2593 /* First check if data segment count from SCSI Layer is good */
2594 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2595 WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
2596 ret = 2;
2597 goto err;
2598 }
2599
2600 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2601
2602 switch (prot_group_type) {
2603 case LPFC_PG_TYPE_NO_DIF:
2604
2605 /* Here we need to add a PDE5 and PDE6 to the count */
2606 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) {
2607 ret = 2;
2608 goto err;
2609 }
2610
2611 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2612 datasegcnt);
2613 /* we should have 2 or more entries in buffer list */
2614 if (num_bde < 2) {
2615 ret = 2;
2616 goto err;
2617 }
2618 break;
2619
2620 case LPFC_PG_TYPE_DIF_BUF:
2621 /*
2622 * This type indicates that protection buffers are
2623 * passed to the driver, so that needs to be prepared
2624 * for DMA
2625 */
2626 protsegcnt = dma_map_sg(&phba->pcidev->dev,
2627 scsi_prot_sglist(scsi_cmnd),
2628 scsi_prot_sg_count(scsi_cmnd), datadir);
2629 if (unlikely(!protsegcnt)) {
2630 scsi_dma_unmap(scsi_cmnd);
2631 return 1;
2632 }
2633
2634 lpfc_cmd->prot_seg_cnt = protsegcnt;
2635
2636 /*
2637 * There is a minimun of 4 BPLs used for every
2638 * protection data segment.
2639 */
2640 if ((lpfc_cmd->prot_seg_cnt * 4) >
2641 (phba->cfg_total_seg_cnt - 2)) {
2642 ret = 2;
2643 goto err;
2644 }
2645
2646 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2647 datasegcnt, protsegcnt);
2648 /* we should have 3 or more entries in buffer list */
2649 if ((num_bde < 3) ||
2650 (num_bde > phba->cfg_total_seg_cnt)) {
2651 ret = 2;
2652 goto err;
2653 }
2654 break;
2655
2656 case LPFC_PG_TYPE_INVALID:
2657 default:
2658 scsi_dma_unmap(scsi_cmnd);
2659 lpfc_cmd->seg_cnt = 0;
2660
2661 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2662 "9022 Unexpected protection group %i\n",
2663 prot_group_type);
2664 return 2;
2665 }
2666 }
2667
2668 /*
2669 * Finish initializing those IOCB fields that are dependent on the
2670 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
2671 * reinitialized since all iocb memory resources are used many times
2672 * for transmit, receive, and continuation bpl's.
2673 */
2674 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2675 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2676 iocb_cmd->ulpBdeCount = 1;
2677 iocb_cmd->ulpLe = 1;
2678
2679 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2680 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2681
2682 /*
2683 * Due to difference in data length between DIF/non-DIF paths,
2684 * we need to set word 4 of IOCB here
2685 */
2686 iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2687
2688 /*
2689 * For First burst, we may need to adjust the initial transfer
2690 * length for DIF
2691 */
2692 if (iocb_cmd->un.fcpi.fcpi_XRdy &&
2693 (fcpdl < vport->cfg_first_burst_size))
2694 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
2695
2696 return 0;
2697 err:
2698 if (lpfc_cmd->seg_cnt)
2699 scsi_dma_unmap(scsi_cmnd);
2700 if (lpfc_cmd->prot_seg_cnt)
2701 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2702 scsi_prot_sg_count(scsi_cmnd),
2703 scsi_cmnd->sc_data_direction);
2704
2705 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2706 "9023 Cannot setup S/G List for HBA"
2707 "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2708 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2709 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2710 prot_group_type, num_bde);
2711
2712 lpfc_cmd->seg_cnt = 0;
2713 lpfc_cmd->prot_seg_cnt = 0;
2714 return ret;
2715 }
2716
2717 /*
2718 * This function calcuates the T10 DIF guard tag
2719 * on the specified data using a CRC algorithmn
2720 * using crc_t10dif.
2721 */
2722 static uint16_t
lpfc_bg_crc(uint8_t * data,int count)2723 lpfc_bg_crc(uint8_t *data, int count)
2724 {
2725 uint16_t crc = 0;
2726 uint16_t x;
2727
2728 crc = crc_t10dif(data, count);
2729 x = cpu_to_be16(crc);
2730 return x;
2731 }
2732
2733 /*
2734 * This function calcuates the T10 DIF guard tag
2735 * on the specified data using a CSUM algorithmn
2736 * using ip_compute_csum.
2737 */
2738 static uint16_t
lpfc_bg_csum(uint8_t * data,int count)2739 lpfc_bg_csum(uint8_t *data, int count)
2740 {
2741 uint16_t ret;
2742
2743 ret = ip_compute_csum(data, count);
2744 return ret;
2745 }
2746
2747 /*
2748 * This function examines the protection data to try to determine
2749 * what type of T10-DIF error occurred.
2750 */
2751 static void
lpfc_calc_bg_err(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)2752 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
2753 {
2754 struct scatterlist *sgpe; /* s/g prot entry */
2755 struct scatterlist *sgde; /* s/g data entry */
2756 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2757 struct scsi_dif_tuple *src = NULL;
2758 uint8_t *data_src = NULL;
2759 uint16_t guard_tag;
2760 uint16_t start_app_tag, app_tag;
2761 uint32_t start_ref_tag, ref_tag;
2762 int prot, protsegcnt;
2763 int err_type, len, data_len;
2764 int chk_ref, chk_app, chk_guard;
2765 uint16_t sum;
2766 unsigned blksize;
2767
2768 err_type = BGS_GUARD_ERR_MASK;
2769 sum = 0;
2770 guard_tag = 0;
2771
2772 /* First check to see if there is protection data to examine */
2773 prot = scsi_get_prot_op(cmd);
2774 if ((prot == SCSI_PROT_READ_STRIP) ||
2775 (prot == SCSI_PROT_WRITE_INSERT) ||
2776 (prot == SCSI_PROT_NORMAL))
2777 goto out;
2778
2779 /* Currently the driver just supports ref_tag and guard_tag checking */
2780 chk_ref = 1;
2781 chk_app = 0;
2782 chk_guard = 0;
2783
2784 /* Setup a ptr to the protection data provided by the SCSI host */
2785 sgpe = scsi_prot_sglist(cmd);
2786 protsegcnt = lpfc_cmd->prot_seg_cnt;
2787
2788 if (sgpe && protsegcnt) {
2789
2790 /*
2791 * We will only try to verify guard tag if the segment
2792 * data length is a multiple of the blksize.
2793 */
2794 sgde = scsi_sglist(cmd);
2795 blksize = scsi_prot_interval(cmd);
2796 data_src = (uint8_t *)sg_virt(sgde);
2797 data_len = sgde->length;
2798 if ((data_len & (blksize - 1)) == 0)
2799 chk_guard = 1;
2800
2801 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2802 start_ref_tag = scsi_prot_ref_tag(cmd);
2803 start_app_tag = src->app_tag;
2804 len = sgpe->length;
2805 while (src && protsegcnt) {
2806 while (len) {
2807
2808 /*
2809 * First check to see if a protection data
2810 * check is valid
2811 */
2812 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2813 (src->app_tag == T10_PI_APP_ESCAPE)) {
2814 start_ref_tag++;
2815 goto skipit;
2816 }
2817
2818 /* First Guard Tag checking */
2819 if (chk_guard) {
2820 guard_tag = src->guard_tag;
2821 if (cmd->prot_flags
2822 & SCSI_PROT_IP_CHECKSUM)
2823 sum = lpfc_bg_csum(data_src,
2824 blksize);
2825 else
2826 sum = lpfc_bg_crc(data_src,
2827 blksize);
2828 if ((guard_tag != sum)) {
2829 err_type = BGS_GUARD_ERR_MASK;
2830 goto out;
2831 }
2832 }
2833
2834 /* Reference Tag checking */
2835 ref_tag = be32_to_cpu(src->ref_tag);
2836 if (chk_ref && (ref_tag != start_ref_tag)) {
2837 err_type = BGS_REFTAG_ERR_MASK;
2838 goto out;
2839 }
2840 start_ref_tag++;
2841
2842 /* App Tag checking */
2843 app_tag = src->app_tag;
2844 if (chk_app && (app_tag != start_app_tag)) {
2845 err_type = BGS_APPTAG_ERR_MASK;
2846 goto out;
2847 }
2848 skipit:
2849 len -= sizeof(struct scsi_dif_tuple);
2850 if (len < 0)
2851 len = 0;
2852 src++;
2853
2854 data_src += blksize;
2855 data_len -= blksize;
2856
2857 /*
2858 * Are we at the end of the Data segment?
2859 * The data segment is only used for Guard
2860 * tag checking.
2861 */
2862 if (chk_guard && (data_len == 0)) {
2863 chk_guard = 0;
2864 sgde = sg_next(sgde);
2865 if (!sgde)
2866 goto out;
2867
2868 data_src = (uint8_t *)sg_virt(sgde);
2869 data_len = sgde->length;
2870 if ((data_len & (blksize - 1)) == 0)
2871 chk_guard = 1;
2872 }
2873 }
2874
2875 /* Goto the next Protection data segment */
2876 sgpe = sg_next(sgpe);
2877 if (sgpe) {
2878 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2879 len = sgpe->length;
2880 } else {
2881 src = NULL;
2882 }
2883 protsegcnt--;
2884 }
2885 }
2886 out:
2887 if (err_type == BGS_GUARD_ERR_MASK) {
2888 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1);
2889 set_host_byte(cmd, DID_ABORT);
2890 phba->bg_guard_err_cnt++;
2891 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2892 "9069 BLKGRD: reftag %x grd_tag err %x != %x\n",
2893 scsi_prot_ref_tag(cmd),
2894 sum, guard_tag);
2895
2896 } else if (err_type == BGS_REFTAG_ERR_MASK) {
2897 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3);
2898 set_host_byte(cmd, DID_ABORT);
2899
2900 phba->bg_reftag_err_cnt++;
2901 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2902 "9066 BLKGRD: reftag %x ref_tag err %x != %x\n",
2903 scsi_prot_ref_tag(cmd),
2904 ref_tag, start_ref_tag);
2905
2906 } else if (err_type == BGS_APPTAG_ERR_MASK) {
2907 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2);
2908 set_host_byte(cmd, DID_ABORT);
2909
2910 phba->bg_apptag_err_cnt++;
2911 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2912 "9041 BLKGRD: reftag %x app_tag err %x != %x\n",
2913 scsi_prot_ref_tag(cmd),
2914 app_tag, start_app_tag);
2915 }
2916 }
2917
2918 /*
2919 * This function checks for BlockGuard errors detected by
2920 * the HBA. In case of errors, the ASC/ASCQ fields in the
2921 * sense buffer will be set accordingly, paired with
2922 * ILLEGAL_REQUEST to signal to the kernel that the HBA
2923 * detected corruption.
2924 *
2925 * Returns:
2926 * 0 - No error found
2927 * 1 - BlockGuard error found
2928 * -1 - Internal error (bad profile, ...etc)
2929 */
2930 static int
lpfc_sli4_parse_bg_err(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd,struct lpfc_wcqe_complete * wcqe)2931 lpfc_sli4_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
2932 struct lpfc_wcqe_complete *wcqe)
2933 {
2934 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2935 int ret = 0;
2936 u32 status = bf_get(lpfc_wcqe_c_status, wcqe);
2937 u32 bghm = 0;
2938 u32 bgstat = 0;
2939 u64 failing_sector = 0;
2940
2941 if (status == CQE_STATUS_DI_ERROR) {
2942 if (bf_get(lpfc_wcqe_c_bg_ge, wcqe)) /* Guard Check failed */
2943 bgstat |= BGS_GUARD_ERR_MASK;
2944 if (bf_get(lpfc_wcqe_c_bg_ae, wcqe)) /* AppTag Check failed */
2945 bgstat |= BGS_APPTAG_ERR_MASK;
2946 if (bf_get(lpfc_wcqe_c_bg_re, wcqe)) /* RefTag Check failed */
2947 bgstat |= BGS_REFTAG_ERR_MASK;
2948
2949 /* Check to see if there was any good data before the error */
2950 if (bf_get(lpfc_wcqe_c_bg_tdpv, wcqe)) {
2951 bgstat |= BGS_HI_WATER_MARK_PRESENT_MASK;
2952 bghm = wcqe->total_data_placed;
2953 }
2954
2955 /*
2956 * Set ALL the error bits to indicate we don't know what
2957 * type of error it is.
2958 */
2959 if (!bgstat)
2960 bgstat |= (BGS_REFTAG_ERR_MASK | BGS_APPTAG_ERR_MASK |
2961 BGS_GUARD_ERR_MASK);
2962 }
2963
2964 if (lpfc_bgs_get_guard_err(bgstat)) {
2965 ret = 1;
2966
2967 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1);
2968 set_host_byte(cmd, DID_ABORT);
2969 phba->bg_guard_err_cnt++;
2970 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2971 "9059 BLKGRD: Guard Tag error in cmd"
2972 " 0x%x lba 0x%llx blk cnt 0x%x "
2973 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2974 (unsigned long long)scsi_get_lba(cmd),
2975 scsi_logical_block_count(cmd), bgstat, bghm);
2976 }
2977
2978 if (lpfc_bgs_get_reftag_err(bgstat)) {
2979 ret = 1;
2980
2981 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3);
2982 set_host_byte(cmd, DID_ABORT);
2983
2984 phba->bg_reftag_err_cnt++;
2985 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2986 "9060 BLKGRD: Ref Tag error in cmd"
2987 " 0x%x lba 0x%llx blk cnt 0x%x "
2988 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2989 (unsigned long long)scsi_get_lba(cmd),
2990 scsi_logical_block_count(cmd), bgstat, bghm);
2991 }
2992
2993 if (lpfc_bgs_get_apptag_err(bgstat)) {
2994 ret = 1;
2995
2996 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2);
2997 set_host_byte(cmd, DID_ABORT);
2998
2999 phba->bg_apptag_err_cnt++;
3000 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3001 "9062 BLKGRD: App Tag error in cmd"
3002 " 0x%x lba 0x%llx blk cnt 0x%x "
3003 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3004 (unsigned long long)scsi_get_lba(cmd),
3005 scsi_logical_block_count(cmd), bgstat, bghm);
3006 }
3007
3008 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3009 /*
3010 * setup sense data descriptor 0 per SPC-4 as an information
3011 * field, and put the failing LBA in it.
3012 * This code assumes there was also a guard/app/ref tag error
3013 * indication.
3014 */
3015 cmd->sense_buffer[7] = 0xc; /* Additional sense length */
3016 cmd->sense_buffer[8] = 0; /* Information descriptor type */
3017 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
3018 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3019
3020 /* bghm is a "on the wire" FC frame based count */
3021 switch (scsi_get_prot_op(cmd)) {
3022 case SCSI_PROT_READ_INSERT:
3023 case SCSI_PROT_WRITE_STRIP:
3024 bghm /= cmd->device->sector_size;
3025 break;
3026 case SCSI_PROT_READ_STRIP:
3027 case SCSI_PROT_WRITE_INSERT:
3028 case SCSI_PROT_READ_PASS:
3029 case SCSI_PROT_WRITE_PASS:
3030 bghm /= (cmd->device->sector_size +
3031 sizeof(struct scsi_dif_tuple));
3032 break;
3033 }
3034
3035 failing_sector = scsi_get_lba(cmd);
3036 failing_sector += bghm;
3037
3038 /* Descriptor Information */
3039 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3040 }
3041
3042 if (!ret) {
3043 /* No error was reported - problem in FW? */
3044 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3045 "9068 BLKGRD: Unknown error in cmd"
3046 " 0x%x lba 0x%llx blk cnt 0x%x "
3047 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3048 (unsigned long long)scsi_get_lba(cmd),
3049 scsi_logical_block_count(cmd), bgstat, bghm);
3050
3051 /* Calculate what type of error it was */
3052 lpfc_calc_bg_err(phba, lpfc_cmd);
3053 }
3054 return ret;
3055 }
3056
3057 /*
3058 * This function checks for BlockGuard errors detected by
3059 * the HBA. In case of errors, the ASC/ASCQ fields in the
3060 * sense buffer will be set accordingly, paired with
3061 * ILLEGAL_REQUEST to signal to the kernel that the HBA
3062 * detected corruption.
3063 *
3064 * Returns:
3065 * 0 - No error found
3066 * 1 - BlockGuard error found
3067 * -1 - Internal error (bad profile, ...etc)
3068 */
3069 static int
lpfc_parse_bg_err(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd,struct lpfc_iocbq * pIocbOut)3070 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
3071 struct lpfc_iocbq *pIocbOut)
3072 {
3073 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3074 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3075 int ret = 0;
3076 uint32_t bghm = bgf->bghm;
3077 uint32_t bgstat = bgf->bgstat;
3078 uint64_t failing_sector = 0;
3079
3080 if (lpfc_bgs_get_invalid_prof(bgstat)) {
3081 cmd->result = DID_ERROR << 16;
3082 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3083 "9072 BLKGRD: Invalid BG Profile in cmd "
3084 "0x%x reftag 0x%x blk cnt 0x%x "
3085 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3086 scsi_prot_ref_tag(cmd),
3087 scsi_logical_block_count(cmd), bgstat, bghm);
3088 ret = (-1);
3089 goto out;
3090 }
3091
3092 if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3093 cmd->result = DID_ERROR << 16;
3094 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3095 "9073 BLKGRD: Invalid BG PDIF Block in cmd "
3096 "0x%x reftag 0x%x blk cnt 0x%x "
3097 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3098 scsi_prot_ref_tag(cmd),
3099 scsi_logical_block_count(cmd), bgstat, bghm);
3100 ret = (-1);
3101 goto out;
3102 }
3103
3104 if (lpfc_bgs_get_guard_err(bgstat)) {
3105 ret = 1;
3106
3107 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1);
3108 set_host_byte(cmd, DID_ABORT);
3109 phba->bg_guard_err_cnt++;
3110 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3111 "9055 BLKGRD: Guard Tag error in cmd "
3112 "0x%x reftag 0x%x blk cnt 0x%x "
3113 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3114 scsi_prot_ref_tag(cmd),
3115 scsi_logical_block_count(cmd), bgstat, bghm);
3116 }
3117
3118 if (lpfc_bgs_get_reftag_err(bgstat)) {
3119 ret = 1;
3120
3121 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3);
3122 set_host_byte(cmd, DID_ABORT);
3123
3124 phba->bg_reftag_err_cnt++;
3125 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3126 "9056 BLKGRD: Ref Tag error in cmd "
3127 "0x%x reftag 0x%x blk cnt 0x%x "
3128 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3129 scsi_prot_ref_tag(cmd),
3130 scsi_logical_block_count(cmd), bgstat, bghm);
3131 }
3132
3133 if (lpfc_bgs_get_apptag_err(bgstat)) {
3134 ret = 1;
3135
3136 scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2);
3137 set_host_byte(cmd, DID_ABORT);
3138
3139 phba->bg_apptag_err_cnt++;
3140 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3141 "9061 BLKGRD: App Tag error in cmd "
3142 "0x%x reftag 0x%x blk cnt 0x%x "
3143 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3144 scsi_prot_ref_tag(cmd),
3145 scsi_logical_block_count(cmd), bgstat, bghm);
3146 }
3147
3148 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3149 /*
3150 * setup sense data descriptor 0 per SPC-4 as an information
3151 * field, and put the failing LBA in it.
3152 * This code assumes there was also a guard/app/ref tag error
3153 * indication.
3154 */
3155 cmd->sense_buffer[7] = 0xc; /* Additional sense length */
3156 cmd->sense_buffer[8] = 0; /* Information descriptor type */
3157 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */
3158 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3159
3160 /* bghm is a "on the wire" FC frame based count */
3161 switch (scsi_get_prot_op(cmd)) {
3162 case SCSI_PROT_READ_INSERT:
3163 case SCSI_PROT_WRITE_STRIP:
3164 bghm /= cmd->device->sector_size;
3165 break;
3166 case SCSI_PROT_READ_STRIP:
3167 case SCSI_PROT_WRITE_INSERT:
3168 case SCSI_PROT_READ_PASS:
3169 case SCSI_PROT_WRITE_PASS:
3170 bghm /= (cmd->device->sector_size +
3171 sizeof(struct scsi_dif_tuple));
3172 break;
3173 }
3174
3175 failing_sector = scsi_get_lba(cmd);
3176 failing_sector += bghm;
3177
3178 /* Descriptor Information */
3179 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3180 }
3181
3182 if (!ret) {
3183 /* No error was reported - problem in FW? */
3184 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3185 "9057 BLKGRD: Unknown error in cmd "
3186 "0x%x reftag 0x%x blk cnt 0x%x "
3187 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3188 scsi_prot_ref_tag(cmd),
3189 scsi_logical_block_count(cmd), bgstat, bghm);
3190
3191 /* Calculate what type of error it was */
3192 lpfc_calc_bg_err(phba, lpfc_cmd);
3193 }
3194 out:
3195 return ret;
3196 }
3197
3198 /**
3199 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3200 * @phba: The Hba for which this call is being executed.
3201 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3202 *
3203 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3204 * field of @lpfc_cmd for device with SLI-4 interface spec.
3205 *
3206 * Return codes:
3207 * 2 - Error - Do not retry
3208 * 1 - Error - Retry
3209 * 0 - Success
3210 **/
3211 static int
lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)3212 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3213 {
3214 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3215 struct scatterlist *sgel = NULL;
3216 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3217 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
3218 struct sli4_sge *first_data_sgl;
3219 struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
3220 struct lpfc_vport *vport = phba->pport;
3221 union lpfc_wqe128 *wqe = &pwqeq->wqe;
3222 dma_addr_t physaddr;
3223 uint32_t num_bde = 0;
3224 uint32_t dma_len;
3225 uint32_t dma_offset = 0;
3226 int nseg, i, j;
3227 struct ulp_bde64 *bde;
3228 bool lsp_just_set = false;
3229 struct sli4_hybrid_sgl *sgl_xtra = NULL;
3230
3231 /*
3232 * There are three possibilities here - use scatter-gather segment, use
3233 * the single mapping, or neither. Start the lpfc command prep by
3234 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3235 * data bde entry.
3236 */
3237 if (scsi_sg_count(scsi_cmnd)) {
3238 /*
3239 * The driver stores the segment count returned from pci_map_sg
3240 * because this a count of dma-mappings used to map the use_sg
3241 * pages. They are not guaranteed to be the same for those
3242 * architectures that implement an IOMMU.
3243 */
3244
3245 nseg = scsi_dma_map(scsi_cmnd);
3246 if (unlikely(nseg <= 0))
3247 return 1;
3248 sgl += 1;
3249 /* clear the last flag in the fcp_rsp map entry */
3250 sgl->word2 = le32_to_cpu(sgl->word2);
3251 bf_set(lpfc_sli4_sge_last, sgl, 0);
3252 sgl->word2 = cpu_to_le32(sgl->word2);
3253 sgl += 1;
3254 first_data_sgl = sgl;
3255 lpfc_cmd->seg_cnt = nseg;
3256 if (!phba->cfg_xpsgl &&
3257 lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3258 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3259 "9074 BLKGRD:"
3260 " %s: Too many sg segments from "
3261 "dma_map_sg. Config %d, seg_cnt %d\n",
3262 __func__, phba->cfg_sg_seg_cnt,
3263 lpfc_cmd->seg_cnt);
3264 WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3265 lpfc_cmd->seg_cnt = 0;
3266 scsi_dma_unmap(scsi_cmnd);
3267 return 2;
3268 }
3269
3270 /*
3271 * The driver established a maximum scatter-gather segment count
3272 * during probe that limits the number of sg elements in any
3273 * single scsi command. Just run through the seg_cnt and format
3274 * the sge's.
3275 * When using SLI-3 the driver will try to fit all the BDEs into
3276 * the IOCB. If it can't then the BDEs get added to a BPL as it
3277 * does for SLI-2 mode.
3278 */
3279
3280 /* for tracking segment boundaries */
3281 sgel = scsi_sglist(scsi_cmnd);
3282 j = 2;
3283 for (i = 0; i < nseg; i++) {
3284 sgl->word2 = 0;
3285 if ((num_bde + 1) == nseg) {
3286 bf_set(lpfc_sli4_sge_last, sgl, 1);
3287 bf_set(lpfc_sli4_sge_type, sgl,
3288 LPFC_SGE_TYPE_DATA);
3289 } else {
3290 bf_set(lpfc_sli4_sge_last, sgl, 0);
3291
3292 /* do we need to expand the segment */
3293 if (!lsp_just_set &&
3294 !((j + 1) % phba->border_sge_num) &&
3295 ((nseg - 1) != i)) {
3296 /* set LSP type */
3297 bf_set(lpfc_sli4_sge_type, sgl,
3298 LPFC_SGE_TYPE_LSP);
3299
3300 sgl_xtra = lpfc_get_sgl_per_hdwq(
3301 phba, lpfc_cmd);
3302
3303 if (unlikely(!sgl_xtra)) {
3304 lpfc_cmd->seg_cnt = 0;
3305 scsi_dma_unmap(scsi_cmnd);
3306 return 1;
3307 }
3308 sgl->addr_lo = cpu_to_le32(putPaddrLow(
3309 sgl_xtra->dma_phys_sgl));
3310 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3311 sgl_xtra->dma_phys_sgl));
3312
3313 } else {
3314 bf_set(lpfc_sli4_sge_type, sgl,
3315 LPFC_SGE_TYPE_DATA);
3316 }
3317 }
3318
3319 if (!(bf_get(lpfc_sli4_sge_type, sgl) &
3320 LPFC_SGE_TYPE_LSP)) {
3321 if ((nseg - 1) == i)
3322 bf_set(lpfc_sli4_sge_last, sgl, 1);
3323
3324 physaddr = sg_dma_address(sgel);
3325 dma_len = sg_dma_len(sgel);
3326 sgl->addr_lo = cpu_to_le32(putPaddrLow(
3327 physaddr));
3328 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3329 physaddr));
3330
3331 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3332 sgl->word2 = cpu_to_le32(sgl->word2);
3333 sgl->sge_len = cpu_to_le32(dma_len);
3334
3335 dma_offset += dma_len;
3336 sgel = sg_next(sgel);
3337
3338 sgl++;
3339 lsp_just_set = false;
3340
3341 } else {
3342 sgl->word2 = cpu_to_le32(sgl->word2);
3343 sgl->sge_len = cpu_to_le32(
3344 phba->cfg_sg_dma_buf_size);
3345
3346 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
3347 i = i - 1;
3348
3349 lsp_just_set = true;
3350 }
3351
3352 j++;
3353 }
3354 /*
3355 * Setup the first Payload BDE. For FCoE we just key off
3356 * Performance Hints, for FC we use lpfc_enable_pbde.
3357 * We populate words 13-15 of IOCB/WQE.
3358 */
3359 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3360 phba->cfg_enable_pbde) {
3361 bde = (struct ulp_bde64 *)
3362 &wqe->words[13];
3363 bde->addrLow = first_data_sgl->addr_lo;
3364 bde->addrHigh = first_data_sgl->addr_hi;
3365 bde->tus.f.bdeSize =
3366 le32_to_cpu(first_data_sgl->sge_len);
3367 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3368 bde->tus.w = cpu_to_le32(bde->tus.w);
3369
3370 } else {
3371 memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
3372 }
3373 } else {
3374 sgl += 1;
3375 /* clear the last flag in the fcp_rsp map entry */
3376 sgl->word2 = le32_to_cpu(sgl->word2);
3377 bf_set(lpfc_sli4_sge_last, sgl, 1);
3378 sgl->word2 = cpu_to_le32(sgl->word2);
3379
3380 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3381 phba->cfg_enable_pbde) {
3382 bde = (struct ulp_bde64 *)
3383 &wqe->words[13];
3384 memset(bde, 0, (sizeof(uint32_t) * 3));
3385 }
3386 }
3387
3388 /* Word 11 */
3389 if (phba->cfg_enable_pbde)
3390 bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);
3391
3392 /*
3393 * Finish initializing those IOCB fields that are dependent on the
3394 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
3395 * explicitly reinitialized.
3396 * all iocb memory resources are reused.
3397 */
3398 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3399 /* Set first-burst provided it was successfully negotiated */
3400 if (!(phba->hba_flag & HBA_FCOE_MODE) &&
3401 vport->cfg_first_burst_size &&
3402 scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
3403 u32 init_len, total_len;
3404
3405 total_len = be32_to_cpu(fcp_cmnd->fcpDl);
3406 init_len = min(total_len, vport->cfg_first_burst_size);
3407
3408 /* Word 4 & 5 */
3409 wqe->fcp_iwrite.initial_xfer_len = init_len;
3410 wqe->fcp_iwrite.total_xfer_len = total_len;
3411 } else {
3412 /* Word 4 */
3413 wqe->fcp_iwrite.total_xfer_len =
3414 be32_to_cpu(fcp_cmnd->fcpDl);
3415 }
3416
3417 /*
3418 * If the OAS driver feature is enabled and the lun is enabled for
3419 * OAS, set the oas iocb related flags.
3420 */
3421 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3422 scsi_cmnd->device->hostdata)->oas_enabled) {
3423 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3424 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3425 scsi_cmnd->device->hostdata)->priority;
3426
3427 /* Word 10 */
3428 bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
3429 bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);
3430
3431 if (lpfc_cmd->cur_iocbq.priority)
3432 bf_set(wqe_ccp, &wqe->generic.wqe_com,
3433 (lpfc_cmd->cur_iocbq.priority << 1));
3434 else
3435 bf_set(wqe_ccp, &wqe->generic.wqe_com,
3436 (phba->cfg_XLanePriority << 1));
3437 }
3438
3439 return 0;
3440 }
3441
3442 /**
3443 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3444 * @phba: The Hba for which this call is being executed.
3445 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3446 *
3447 * This is the protection/DIF aware version of
3448 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3449 * two functions eventually, but for now, it's here
3450 * Return codes:
3451 * 2 - Error - Do not retry
3452 * 1 - Error - Retry
3453 * 0 - Success
3454 **/
3455 static int
lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)3456 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3457 struct lpfc_io_buf *lpfc_cmd)
3458 {
3459 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3460 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3461 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl);
3462 struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
3463 union lpfc_wqe128 *wqe = &pwqeq->wqe;
3464 uint32_t num_sge = 0;
3465 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3466 int prot_group_type = 0;
3467 int fcpdl;
3468 int ret = 1;
3469 struct lpfc_vport *vport = phba->pport;
3470
3471 /*
3472 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3473 * fcp_rsp regions to the first data sge entry
3474 */
3475 if (scsi_sg_count(scsi_cmnd)) {
3476 /*
3477 * The driver stores the segment count returned from pci_map_sg
3478 * because this a count of dma-mappings used to map the use_sg
3479 * pages. They are not guaranteed to be the same for those
3480 * architectures that implement an IOMMU.
3481 */
3482 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3483 scsi_sglist(scsi_cmnd),
3484 scsi_sg_count(scsi_cmnd), datadir);
3485 if (unlikely(!datasegcnt))
3486 return 1;
3487
3488 sgl += 1;
3489 /* clear the last flag in the fcp_rsp map entry */
3490 sgl->word2 = le32_to_cpu(sgl->word2);
3491 bf_set(lpfc_sli4_sge_last, sgl, 0);
3492 sgl->word2 = cpu_to_le32(sgl->word2);
3493
3494 sgl += 1;
3495 lpfc_cmd->seg_cnt = datasegcnt;
3496
3497 /* First check if data segment count from SCSI Layer is good */
3498 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt &&
3499 !phba->cfg_xpsgl) {
3500 WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3501 ret = 2;
3502 goto err;
3503 }
3504
3505 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3506
3507 switch (prot_group_type) {
3508 case LPFC_PG_TYPE_NO_DIF:
3509 /* Here we need to add a DISEED to the count */
3510 if (((lpfc_cmd->seg_cnt + 1) >
3511 phba->cfg_total_seg_cnt) &&
3512 !phba->cfg_xpsgl) {
3513 ret = 2;
3514 goto err;
3515 }
3516
3517 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3518 datasegcnt, lpfc_cmd);
3519
3520 /* we should have 2 or more entries in buffer list */
3521 if (num_sge < 2) {
3522 ret = 2;
3523 goto err;
3524 }
3525 break;
3526
3527 case LPFC_PG_TYPE_DIF_BUF:
3528 /*
3529 * This type indicates that protection buffers are
3530 * passed to the driver, so that needs to be prepared
3531 * for DMA
3532 */
3533 protsegcnt = dma_map_sg(&phba->pcidev->dev,
3534 scsi_prot_sglist(scsi_cmnd),
3535 scsi_prot_sg_count(scsi_cmnd), datadir);
3536 if (unlikely(!protsegcnt)) {
3537 scsi_dma_unmap(scsi_cmnd);
3538 return 1;
3539 }
3540
3541 lpfc_cmd->prot_seg_cnt = protsegcnt;
3542 /*
3543 * There is a minimun of 3 SGEs used for every
3544 * protection data segment.
3545 */
3546 if (((lpfc_cmd->prot_seg_cnt * 3) >
3547 (phba->cfg_total_seg_cnt - 2)) &&
3548 !phba->cfg_xpsgl) {
3549 ret = 2;
3550 goto err;
3551 }
3552
3553 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3554 datasegcnt, protsegcnt, lpfc_cmd);
3555
3556 /* we should have 3 or more entries in buffer list */
3557 if (num_sge < 3 ||
3558 (num_sge > phba->cfg_total_seg_cnt &&
3559 !phba->cfg_xpsgl)) {
3560 ret = 2;
3561 goto err;
3562 }
3563 break;
3564
3565 case LPFC_PG_TYPE_INVALID:
3566 default:
3567 scsi_dma_unmap(scsi_cmnd);
3568 lpfc_cmd->seg_cnt = 0;
3569
3570 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3571 "9083 Unexpected protection group %i\n",
3572 prot_group_type);
3573 return 2;
3574 }
3575 }
3576
3577 switch (scsi_get_prot_op(scsi_cmnd)) {
3578 case SCSI_PROT_WRITE_STRIP:
3579 case SCSI_PROT_READ_STRIP:
3580 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3581 break;
3582 case SCSI_PROT_WRITE_INSERT:
3583 case SCSI_PROT_READ_INSERT:
3584 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3585 break;
3586 case SCSI_PROT_WRITE_PASS:
3587 case SCSI_PROT_READ_PASS:
3588 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3589 break;
3590 }
3591
3592 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3593 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3594
3595 /* Set first-burst provided it was successfully negotiated */
3596 if (!(phba->hba_flag & HBA_FCOE_MODE) &&
3597 vport->cfg_first_burst_size &&
3598 scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
3599 u32 init_len, total_len;
3600
3601 total_len = be32_to_cpu(fcp_cmnd->fcpDl);
3602 init_len = min(total_len, vport->cfg_first_burst_size);
3603
3604 /* Word 4 & 5 */
3605 wqe->fcp_iwrite.initial_xfer_len = init_len;
3606 wqe->fcp_iwrite.total_xfer_len = total_len;
3607 } else {
3608 /* Word 4 */
3609 wqe->fcp_iwrite.total_xfer_len =
3610 be32_to_cpu(fcp_cmnd->fcpDl);
3611 }
3612
3613 /*
3614 * If the OAS driver feature is enabled and the lun is enabled for
3615 * OAS, set the oas iocb related flags.
3616 */
3617 if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3618 scsi_cmnd->device->hostdata)->oas_enabled) {
3619 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3620
3621 /* Word 10 */
3622 bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
3623 bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);
3624 bf_set(wqe_ccp, &wqe->generic.wqe_com,
3625 (phba->cfg_XLanePriority << 1));
3626 }
3627
3628 /* Word 7. DIF Flags */
3629 if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_PASS)
3630 bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU);
3631 else if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_STRIP)
3632 bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_STRIP);
3633 else if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_INSERT)
3634 bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_INSERT);
3635
3636 lpfc_cmd->cur_iocbq.iocb_flag &= ~(LPFC_IO_DIF_PASS |
3637 LPFC_IO_DIF_STRIP | LPFC_IO_DIF_INSERT);
3638
3639 return 0;
3640 err:
3641 if (lpfc_cmd->seg_cnt)
3642 scsi_dma_unmap(scsi_cmnd);
3643 if (lpfc_cmd->prot_seg_cnt)
3644 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3645 scsi_prot_sg_count(scsi_cmnd),
3646 scsi_cmnd->sc_data_direction);
3647
3648 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3649 "9084 Cannot setup S/G List for HBA "
3650 "IO segs %d/%d SGL %d SCSI %d: %d %d %d\n",
3651 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3652 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3653 prot_group_type, num_sge, ret);
3654
3655 lpfc_cmd->seg_cnt = 0;
3656 lpfc_cmd->prot_seg_cnt = 0;
3657 return ret;
3658 }
3659
3660 /**
3661 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3662 * @phba: The Hba for which this call is being executed.
3663 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3664 *
3665 * This routine wraps the actual DMA mapping function pointer from the
3666 * lpfc_hba struct.
3667 *
3668 * Return codes:
3669 * 1 - Error
3670 * 0 - Success
3671 **/
3672 static inline int
lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)3673 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3674 {
3675 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3676 }
3677
3678 /**
3679 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3680 * using BlockGuard.
3681 * @phba: The Hba for which this call is being executed.
3682 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3683 *
3684 * This routine wraps the actual DMA mapping function pointer from the
3685 * lpfc_hba struct.
3686 *
3687 * Return codes:
3688 * 1 - Error
3689 * 0 - Success
3690 **/
3691 static inline int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba * phba,struct lpfc_io_buf * lpfc_cmd)3692 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3693 {
3694 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3695 }
3696
3697 /**
3698 * lpfc_scsi_prep_cmnd_buf - Wrapper function for IOCB/WQE mapping of scsi
3699 * buffer
3700 * @vport: Pointer to vport object.
3701 * @lpfc_cmd: The scsi buffer which is going to be mapped.
3702 * @tmo: Timeout value for IO
3703 *
3704 * This routine initializes IOCB/WQE data structure from scsi command
3705 *
3706 * Return codes:
3707 * 1 - Error
3708 * 0 - Success
3709 **/
3710 static inline int
lpfc_scsi_prep_cmnd_buf(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint8_t tmo)3711 lpfc_scsi_prep_cmnd_buf(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
3712 uint8_t tmo)
3713 {
3714 return vport->phba->lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, tmo);
3715 }
3716
3717 /**
3718 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3719 * @phba: Pointer to hba context object.
3720 * @vport: Pointer to vport object.
3721 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3722 * @fcpi_parm: FCP Initiator parameter.
3723 *
3724 * This function posts an event when there is a SCSI command reporting
3725 * error from the scsi device.
3726 **/
3727 static void
lpfc_send_scsi_error_event(struct lpfc_hba * phba,struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint32_t fcpi_parm)3728 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3729 struct lpfc_io_buf *lpfc_cmd, uint32_t fcpi_parm) {
3730 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3731 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3732 uint32_t resp_info = fcprsp->rspStatus2;
3733 uint32_t scsi_status = fcprsp->rspStatus3;
3734 struct lpfc_fast_path_event *fast_path_evt = NULL;
3735 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3736 unsigned long flags;
3737
3738 if (!pnode)
3739 return;
3740
3741 /* If there is queuefull or busy condition send a scsi event */
3742 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3743 (cmnd->result == SAM_STAT_BUSY)) {
3744 fast_path_evt = lpfc_alloc_fast_evt(phba);
3745 if (!fast_path_evt)
3746 return;
3747 fast_path_evt->un.scsi_evt.event_type =
3748 FC_REG_SCSI_EVENT;
3749 fast_path_evt->un.scsi_evt.subcategory =
3750 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3751 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3752 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3753 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3754 &pnode->nlp_portname, sizeof(struct lpfc_name));
3755 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3756 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3757 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3758 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3759 fast_path_evt = lpfc_alloc_fast_evt(phba);
3760 if (!fast_path_evt)
3761 return;
3762 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3763 FC_REG_SCSI_EVENT;
3764 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3765 LPFC_EVENT_CHECK_COND;
3766 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3767 cmnd->device->lun;
3768 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3769 &pnode->nlp_portname, sizeof(struct lpfc_name));
3770 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3771 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3772 fast_path_evt->un.check_cond_evt.sense_key =
3773 cmnd->sense_buffer[2] & 0xf;
3774 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3775 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3776 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3777 fcpi_parm &&
3778 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3779 ((scsi_status == SAM_STAT_GOOD) &&
3780 !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3781 /*
3782 * If status is good or resid does not match with fcp_param and
3783 * there is valid fcpi_parm, then there is a read_check error
3784 */
3785 fast_path_evt = lpfc_alloc_fast_evt(phba);
3786 if (!fast_path_evt)
3787 return;
3788 fast_path_evt->un.read_check_error.header.event_type =
3789 FC_REG_FABRIC_EVENT;
3790 fast_path_evt->un.read_check_error.header.subcategory =
3791 LPFC_EVENT_FCPRDCHKERR;
3792 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3793 &pnode->nlp_portname, sizeof(struct lpfc_name));
3794 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3795 &pnode->nlp_nodename, sizeof(struct lpfc_name));
3796 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3797 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3798 fast_path_evt->un.read_check_error.fcpiparam =
3799 fcpi_parm;
3800 } else
3801 return;
3802
3803 fast_path_evt->vport = vport;
3804 spin_lock_irqsave(&phba->hbalock, flags);
3805 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3806 spin_unlock_irqrestore(&phba->hbalock, flags);
3807 lpfc_worker_wake_up(phba);
3808 return;
3809 }
3810
3811 /**
3812 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3813 * @phba: The HBA for which this call is being executed.
3814 * @psb: The scsi buffer which is going to be un-mapped.
3815 *
3816 * This routine does DMA un-mapping of scatter gather list of scsi command
3817 * field of @lpfc_cmd for device with SLI-3 interface spec.
3818 **/
3819 static void
lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba,struct lpfc_io_buf * psb)3820 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
3821 {
3822 /*
3823 * There are only two special cases to consider. (1) the scsi command
3824 * requested scatter-gather usage or (2) the scsi command allocated
3825 * a request buffer, but did not request use_sg. There is a third
3826 * case, but it does not require resource deallocation.
3827 */
3828 if (psb->seg_cnt > 0)
3829 scsi_dma_unmap(psb->pCmd);
3830 if (psb->prot_seg_cnt > 0)
3831 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3832 scsi_prot_sg_count(psb->pCmd),
3833 psb->pCmd->sc_data_direction);
3834 }
3835
3836 /**
3837 * lpfc_unblock_requests - allow further commands to be queued.
3838 * @phba: pointer to phba object
3839 *
3840 * For single vport, just call scsi_unblock_requests on physical port.
3841 * For multiple vports, send scsi_unblock_requests for all the vports.
3842 */
3843 void
lpfc_unblock_requests(struct lpfc_hba * phba)3844 lpfc_unblock_requests(struct lpfc_hba *phba)
3845 {
3846 struct lpfc_vport **vports;
3847 struct Scsi_Host *shost;
3848 int i;
3849
3850 if (phba->sli_rev == LPFC_SLI_REV4 &&
3851 !phba->sli4_hba.max_cfg_param.vpi_used) {
3852 shost = lpfc_shost_from_vport(phba->pport);
3853 scsi_unblock_requests(shost);
3854 return;
3855 }
3856
3857 vports = lpfc_create_vport_work_array(phba);
3858 if (vports != NULL)
3859 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
3860 shost = lpfc_shost_from_vport(vports[i]);
3861 scsi_unblock_requests(shost);
3862 }
3863 lpfc_destroy_vport_work_array(phba, vports);
3864 }
3865
3866 /**
3867 * lpfc_block_requests - prevent further commands from being queued.
3868 * @phba: pointer to phba object
3869 *
3870 * For single vport, just call scsi_block_requests on physical port.
3871 * For multiple vports, send scsi_block_requests for all the vports.
3872 */
3873 void
lpfc_block_requests(struct lpfc_hba * phba)3874 lpfc_block_requests(struct lpfc_hba *phba)
3875 {
3876 struct lpfc_vport **vports;
3877 struct Scsi_Host *shost;
3878 int i;
3879
3880 if (atomic_read(&phba->cmf_stop_io))
3881 return;
3882
3883 if (phba->sli_rev == LPFC_SLI_REV4 &&
3884 !phba->sli4_hba.max_cfg_param.vpi_used) {
3885 shost = lpfc_shost_from_vport(phba->pport);
3886 scsi_block_requests(shost);
3887 return;
3888 }
3889
3890 vports = lpfc_create_vport_work_array(phba);
3891 if (vports != NULL)
3892 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
3893 shost = lpfc_shost_from_vport(vports[i]);
3894 scsi_block_requests(shost);
3895 }
3896 lpfc_destroy_vport_work_array(phba, vports);
3897 }
3898
3899 /**
3900 * lpfc_update_cmf_cmpl - Adjust CMF counters for IO completion
3901 * @phba: The HBA for which this call is being executed.
3902 * @time: The latency of the IO that completed (in ns)
3903 * @size: The size of the IO that completed
3904 * @shost: SCSI host the IO completed on (NULL for a NVME IO)
3905 *
3906 * The routine adjusts the various Burst and Bandwidth counters used in
3907 * Congestion management and E2E. If time is set to LPFC_CGN_NOT_SENT,
3908 * that means the IO was never issued to the HBA, so this routine is
3909 * just being called to cleanup the counter from a previous
3910 * lpfc_update_cmf_cmd call.
3911 */
3912 int
lpfc_update_cmf_cmpl(struct lpfc_hba * phba,uint64_t time,uint32_t size,struct Scsi_Host * shost)3913 lpfc_update_cmf_cmpl(struct lpfc_hba *phba,
3914 uint64_t time, uint32_t size, struct Scsi_Host *shost)
3915 {
3916 struct lpfc_cgn_stat *cgs;
3917
3918 if (time != LPFC_CGN_NOT_SENT) {
3919 /* lat is ns coming in, save latency in us */
3920 if (time < 1000)
3921 time = 1;
3922 else
3923 time = div_u64(time + 500, 1000); /* round it */
3924
3925 cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id());
3926 atomic64_add(size, &cgs->rcv_bytes);
3927 atomic64_add(time, &cgs->rx_latency);
3928 atomic_inc(&cgs->rx_io_cnt);
3929 }
3930 return 0;
3931 }
3932
3933 /**
3934 * lpfc_update_cmf_cmd - Adjust CMF counters for IO submission
3935 * @phba: The HBA for which this call is being executed.
3936 * @size: The size of the IO that will be issued
3937 *
3938 * The routine adjusts the various Burst and Bandwidth counters used in
3939 * Congestion management and E2E.
3940 */
3941 int
lpfc_update_cmf_cmd(struct lpfc_hba * phba,uint32_t size)3942 lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size)
3943 {
3944 uint64_t total;
3945 struct lpfc_cgn_stat *cgs;
3946 int cpu;
3947
3948 /* At this point we are either LPFC_CFG_MANAGED or LPFC_CFG_MONITOR */
3949 if (phba->cmf_active_mode == LPFC_CFG_MANAGED) {
3950 total = 0;
3951 for_each_present_cpu(cpu) {
3952 cgs = per_cpu_ptr(phba->cmf_stat, cpu);
3953 total += atomic64_read(&cgs->total_bytes);
3954 }
3955 if (total >= phba->cmf_max_bytes_per_interval) {
3956 if (!atomic_xchg(&phba->cmf_bw_wait, 1)) {
3957 lpfc_block_requests(phba);
3958 phba->cmf_last_ts =
3959 lpfc_calc_cmf_latency(phba);
3960 }
3961 atomic_inc(&phba->cmf_busy);
3962 return -EBUSY;
3963 }
3964 if (size > atomic_read(&phba->rx_max_read_cnt))
3965 atomic_set(&phba->rx_max_read_cnt, size);
3966 }
3967
3968 cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id());
3969 atomic64_add(size, &cgs->total_bytes);
3970 return 0;
3971 }
3972
3973 /**
3974 * lpfc_handle_fcp_err - FCP response handler
3975 * @vport: The virtual port for which this call is being executed.
3976 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
3977 * @fcpi_parm: FCP Initiator parameter.
3978 *
3979 * This routine is called to process response IOCB with status field
3980 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3981 * based upon SCSI and FCP error.
3982 **/
3983 static void
lpfc_handle_fcp_err(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint32_t fcpi_parm)3984 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
3985 uint32_t fcpi_parm)
3986 {
3987 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3988 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3989 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3990 uint32_t resp_info = fcprsp->rspStatus2;
3991 uint32_t scsi_status = fcprsp->rspStatus3;
3992 uint32_t *lp;
3993 uint32_t host_status = DID_OK;
3994 uint32_t rsplen = 0;
3995 uint32_t fcpDl;
3996 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3997
3998
3999 /*
4000 * If this is a task management command, there is no
4001 * scsi packet associated with this lpfc_cmd. The driver
4002 * consumes it.
4003 */
4004 if (fcpcmd->fcpCntl2) {
4005 scsi_status = 0;
4006 goto out;
4007 }
4008
4009 if (resp_info & RSP_LEN_VALID) {
4010 rsplen = be32_to_cpu(fcprsp->rspRspLen);
4011 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
4012 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4013 "2719 Invalid response length: "
4014 "tgt x%x lun x%llx cmnd x%x rsplen "
4015 "x%x\n", cmnd->device->id,
4016 cmnd->device->lun, cmnd->cmnd[0],
4017 rsplen);
4018 host_status = DID_ERROR;
4019 goto out;
4020 }
4021 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
4022 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4023 "2757 Protocol failure detected during "
4024 "processing of FCP I/O op: "
4025 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
4026 cmnd->device->id,
4027 cmnd->device->lun, cmnd->cmnd[0],
4028 fcprsp->rspInfo3);
4029 host_status = DID_ERROR;
4030 goto out;
4031 }
4032 }
4033
4034 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
4035 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
4036 if (snslen > SCSI_SENSE_BUFFERSIZE)
4037 snslen = SCSI_SENSE_BUFFERSIZE;
4038
4039 if (resp_info & RSP_LEN_VALID)
4040 rsplen = be32_to_cpu(fcprsp->rspRspLen);
4041 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
4042 }
4043 lp = (uint32_t *)cmnd->sense_buffer;
4044
4045 /* special handling for under run conditions */
4046 if (!scsi_status && (resp_info & RESID_UNDER)) {
4047 /* don't log under runs if fcp set... */
4048 if (vport->cfg_log_verbose & LOG_FCP)
4049 logit = LOG_FCP_ERROR;
4050 /* unless operator says so */
4051 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
4052 logit = LOG_FCP_UNDER;
4053 }
4054
4055 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4056 "9024 FCP command x%x failed: x%x SNS x%x x%x "
4057 "Data: x%x x%x x%x x%x x%x\n",
4058 cmnd->cmnd[0], scsi_status,
4059 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
4060 be32_to_cpu(fcprsp->rspResId),
4061 be32_to_cpu(fcprsp->rspSnsLen),
4062 be32_to_cpu(fcprsp->rspRspLen),
4063 fcprsp->rspInfo3);
4064
4065 scsi_set_resid(cmnd, 0);
4066 fcpDl = be32_to_cpu(fcpcmd->fcpDl);
4067 if (resp_info & RESID_UNDER) {
4068 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
4069
4070 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
4071 "9025 FCP Underrun, expected %d, "
4072 "residual %d Data: x%x x%x x%x\n",
4073 fcpDl,
4074 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
4075 cmnd->underflow);
4076
4077 /*
4078 * If there is an under run, check if under run reported by
4079 * storage array is same as the under run reported by HBA.
4080 * If this is not same, there is a dropped frame.
4081 */
4082 if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
4083 lpfc_printf_vlog(vport, KERN_WARNING,
4084 LOG_FCP | LOG_FCP_ERROR,
4085 "9026 FCP Read Check Error "
4086 "and Underrun Data: x%x x%x x%x x%x\n",
4087 fcpDl,
4088 scsi_get_resid(cmnd), fcpi_parm,
4089 cmnd->cmnd[0]);
4090 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
4091 host_status = DID_ERROR;
4092 }
4093 /*
4094 * The cmnd->underflow is the minimum number of bytes that must
4095 * be transferred for this command. Provided a sense condition
4096 * is not present, make sure the actual amount transferred is at
4097 * least the underflow value or fail.
4098 */
4099 if (!(resp_info & SNS_LEN_VALID) &&
4100 (scsi_status == SAM_STAT_GOOD) &&
4101 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
4102 < cmnd->underflow)) {
4103 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4104 "9027 FCP command x%x residual "
4105 "underrun converted to error "
4106 "Data: x%x x%x x%x\n",
4107 cmnd->cmnd[0], scsi_bufflen(cmnd),
4108 scsi_get_resid(cmnd), cmnd->underflow);
4109 host_status = DID_ERROR;
4110 }
4111 } else if (resp_info & RESID_OVER) {
4112 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4113 "9028 FCP command x%x residual overrun error. "
4114 "Data: x%x x%x\n", cmnd->cmnd[0],
4115 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
4116 host_status = DID_ERROR;
4117
4118 /*
4119 * Check SLI validation that all the transfer was actually done
4120 * (fcpi_parm should be zero). Apply check only to reads.
4121 */
4122 } else if (fcpi_parm) {
4123 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
4124 "9029 FCP %s Check Error Data: "
4125 "x%x x%x x%x x%x x%x\n",
4126 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
4127 "Read" : "Write"),
4128 fcpDl, be32_to_cpu(fcprsp->rspResId),
4129 fcpi_parm, cmnd->cmnd[0], scsi_status);
4130
4131 /* There is some issue with the LPe12000 that causes it
4132 * to miscalculate the fcpi_parm and falsely trip this
4133 * recovery logic. Detect this case and don't error when true.
4134 */
4135 if (fcpi_parm > fcpDl)
4136 goto out;
4137
4138 switch (scsi_status) {
4139 case SAM_STAT_GOOD:
4140 case SAM_STAT_CHECK_CONDITION:
4141 /* Fabric dropped a data frame. Fail any successful
4142 * command in which we detected dropped frames.
4143 * A status of good or some check conditions could
4144 * be considered a successful command.
4145 */
4146 host_status = DID_ERROR;
4147 break;
4148 }
4149 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
4150 }
4151
4152 out:
4153 cmnd->result = host_status << 16 | scsi_status;
4154 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, fcpi_parm);
4155 }
4156
4157 /**
4158 * lpfc_fcp_io_cmd_wqe_cmpl - Complete a FCP IO
4159 * @phba: The hba for which this call is being executed.
4160 * @pwqeIn: The command WQE for the scsi cmnd.
4161 * @wcqe: Pointer to driver response CQE object.
4162 *
4163 * This routine assigns scsi command result by looking into response WQE
4164 * status field appropriately. This routine handles QUEUE FULL condition as
4165 * well by ramping down device queue depth.
4166 **/
4167 static void
lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba * phba,struct lpfc_iocbq * pwqeIn,struct lpfc_wcqe_complete * wcqe)4168 lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
4169 struct lpfc_wcqe_complete *wcqe)
4170 {
4171 struct lpfc_io_buf *lpfc_cmd =
4172 (struct lpfc_io_buf *)pwqeIn->context1;
4173 struct lpfc_vport *vport = pwqeIn->vport;
4174 struct lpfc_rport_data *rdata;
4175 struct lpfc_nodelist *ndlp;
4176 struct scsi_cmnd *cmd;
4177 unsigned long flags;
4178 struct lpfc_fast_path_event *fast_path_evt;
4179 struct Scsi_Host *shost;
4180 u32 logit = LOG_FCP;
4181 u32 status, idx;
4182 unsigned long iflags = 0;
4183 u32 lat;
4184 u8 wait_xb_clr = 0;
4185
4186 /* Sanity check on return of outstanding command */
4187 if (!lpfc_cmd) {
4188 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4189 "9032 Null lpfc_cmd pointer. No "
4190 "release, skip completion\n");
4191 return;
4192 }
4193
4194 rdata = lpfc_cmd->rdata;
4195 ndlp = rdata->pnode;
4196
4197 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
4198 /* TOREMOVE - currently this flag is checked during
4199 * the release of lpfc_iocbq. Remove once we move
4200 * to lpfc_wqe_job construct.
4201 *
4202 * This needs to be done outside buf_lock
4203 */
4204 spin_lock_irqsave(&phba->hbalock, iflags);
4205 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_EXCHANGE_BUSY;
4206 spin_unlock_irqrestore(&phba->hbalock, iflags);
4207 }
4208
4209 /* Guard against abort handler being called at same time */
4210 spin_lock(&lpfc_cmd->buf_lock);
4211
4212 /* Sanity check on return of outstanding command */
4213 cmd = lpfc_cmd->pCmd;
4214 if (!cmd) {
4215 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4216 "9042 I/O completion: Not an active IO\n");
4217 spin_unlock(&lpfc_cmd->buf_lock);
4218 lpfc_release_scsi_buf(phba, lpfc_cmd);
4219 return;
4220 }
4221 idx = lpfc_cmd->cur_iocbq.hba_wqidx;
4222 if (phba->sli4_hba.hdwq)
4223 phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
4224
4225 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4226 if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
4227 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
4228 #endif
4229 shost = cmd->device->host;
4230
4231 status = bf_get(lpfc_wcqe_c_status, wcqe);
4232 lpfc_cmd->status = (status & LPFC_IOCB_STATUS_MASK);
4233 lpfc_cmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
4234
4235 lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
4236 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
4237 lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
4238 if (phba->cfg_fcp_wait_abts_rsp)
4239 wait_xb_clr = 1;
4240 }
4241
4242 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4243 if (lpfc_cmd->prot_data_type) {
4244 struct scsi_dif_tuple *src = NULL;
4245
4246 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4247 /*
4248 * Used to restore any changes to protection
4249 * data for error injection.
4250 */
4251 switch (lpfc_cmd->prot_data_type) {
4252 case LPFC_INJERR_REFTAG:
4253 src->ref_tag =
4254 lpfc_cmd->prot_data;
4255 break;
4256 case LPFC_INJERR_APPTAG:
4257 src->app_tag =
4258 (uint16_t)lpfc_cmd->prot_data;
4259 break;
4260 case LPFC_INJERR_GUARD:
4261 src->guard_tag =
4262 (uint16_t)lpfc_cmd->prot_data;
4263 break;
4264 default:
4265 break;
4266 }
4267
4268 lpfc_cmd->prot_data = 0;
4269 lpfc_cmd->prot_data_type = 0;
4270 lpfc_cmd->prot_data_segment = NULL;
4271 }
4272 #endif
4273 if (unlikely(lpfc_cmd->status)) {
4274 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4275 (lpfc_cmd->result & IOERR_DRVR_MASK))
4276 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4277 else if (lpfc_cmd->status >= IOSTAT_CNT)
4278 lpfc_cmd->status = IOSTAT_DEFAULT;
4279 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4280 !lpfc_cmd->fcp_rsp->rspStatus3 &&
4281 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4282 !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4283 logit = 0;
4284 else
4285 logit = LOG_FCP | LOG_FCP_UNDER;
4286 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4287 "9034 FCP cmd x%x failed <%d/%lld> "
4288 "status: x%x result: x%x "
4289 "sid: x%x did: x%x oxid: x%x "
4290 "Data: x%x x%x x%x\n",
4291 cmd->cmnd[0],
4292 cmd->device ? cmd->device->id : 0xffff,
4293 cmd->device ? cmd->device->lun : 0xffff,
4294 lpfc_cmd->status, lpfc_cmd->result,
4295 vport->fc_myDID,
4296 (ndlp) ? ndlp->nlp_DID : 0,
4297 lpfc_cmd->cur_iocbq.sli4_xritag,
4298 wcqe->parameter, wcqe->total_data_placed,
4299 lpfc_cmd->cur_iocbq.iotag);
4300 }
4301
4302 switch (lpfc_cmd->status) {
4303 case IOSTAT_SUCCESS:
4304 cmd->result = DID_OK << 16;
4305 break;
4306 case IOSTAT_FCP_RSP_ERROR:
4307 lpfc_handle_fcp_err(vport, lpfc_cmd,
4308 pwqeIn->wqe.fcp_iread.total_xfer_len -
4309 wcqe->total_data_placed);
4310 break;
4311 case IOSTAT_NPORT_BSY:
4312 case IOSTAT_FABRIC_BSY:
4313 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4314 fast_path_evt = lpfc_alloc_fast_evt(phba);
4315 if (!fast_path_evt)
4316 break;
4317 fast_path_evt->un.fabric_evt.event_type =
4318 FC_REG_FABRIC_EVENT;
4319 fast_path_evt->un.fabric_evt.subcategory =
4320 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4321 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4322 if (ndlp) {
4323 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4324 &ndlp->nlp_portname,
4325 sizeof(struct lpfc_name));
4326 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4327 &ndlp->nlp_nodename,
4328 sizeof(struct lpfc_name));
4329 }
4330 fast_path_evt->vport = vport;
4331 fast_path_evt->work_evt.evt =
4332 LPFC_EVT_FASTPATH_MGMT_EVT;
4333 spin_lock_irqsave(&phba->hbalock, flags);
4334 list_add_tail(&fast_path_evt->work_evt.evt_listp,
4335 &phba->work_list);
4336 spin_unlock_irqrestore(&phba->hbalock, flags);
4337 lpfc_worker_wake_up(phba);
4338 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4339 "9035 Fabric/Node busy FCP cmd x%x failed"
4340 " <%d/%lld> "
4341 "status: x%x result: x%x "
4342 "sid: x%x did: x%x oxid: x%x "
4343 "Data: x%x x%x x%x\n",
4344 cmd->cmnd[0],
4345 cmd->device ? cmd->device->id : 0xffff,
4346 cmd->device ? cmd->device->lun : 0xffff,
4347 lpfc_cmd->status, lpfc_cmd->result,
4348 vport->fc_myDID,
4349 (ndlp) ? ndlp->nlp_DID : 0,
4350 lpfc_cmd->cur_iocbq.sli4_xritag,
4351 wcqe->parameter,
4352 wcqe->total_data_placed,
4353 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4354 break;
4355 case IOSTAT_REMOTE_STOP:
4356 if (ndlp) {
4357 /* This I/O was aborted by the target, we don't
4358 * know the rxid and because we did not send the
4359 * ABTS we cannot generate and RRQ.
4360 */
4361 lpfc_set_rrq_active(phba, ndlp,
4362 lpfc_cmd->cur_iocbq.sli4_lxritag,
4363 0, 0);
4364 }
4365 fallthrough;
4366 case IOSTAT_LOCAL_REJECT:
4367 if (lpfc_cmd->result & IOERR_DRVR_MASK)
4368 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4369 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4370 lpfc_cmd->result ==
4371 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4372 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4373 lpfc_cmd->result ==
4374 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4375 cmd->result = DID_NO_CONNECT << 16;
4376 break;
4377 }
4378 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4379 lpfc_cmd->result == IOERR_NO_RESOURCES ||
4380 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4381 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4382 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4383 break;
4384 }
4385 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4386 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4387 status == CQE_STATUS_DI_ERROR) {
4388 if (scsi_get_prot_op(cmd) !=
4389 SCSI_PROT_NORMAL) {
4390 /*
4391 * This is a response for a BG enabled
4392 * cmd. Parse BG error
4393 */
4394 lpfc_sli4_parse_bg_err(phba, lpfc_cmd,
4395 wcqe);
4396 break;
4397 }
4398 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
4399 "9040 non-zero BGSTAT on unprotected cmd\n");
4400 }
4401 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4402 "9036 Local Reject FCP cmd x%x failed"
4403 " <%d/%lld> "
4404 "status: x%x result: x%x "
4405 "sid: x%x did: x%x oxid: x%x "
4406 "Data: x%x x%x x%x\n",
4407 cmd->cmnd[0],
4408 cmd->device ? cmd->device->id : 0xffff,
4409 cmd->device ? cmd->device->lun : 0xffff,
4410 lpfc_cmd->status, lpfc_cmd->result,
4411 vport->fc_myDID,
4412 (ndlp) ? ndlp->nlp_DID : 0,
4413 lpfc_cmd->cur_iocbq.sli4_xritag,
4414 wcqe->parameter,
4415 wcqe->total_data_placed,
4416 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4417 fallthrough;
4418 default:
4419 if (lpfc_cmd->status >= IOSTAT_CNT)
4420 lpfc_cmd->status = IOSTAT_DEFAULT;
4421 cmd->result = DID_ERROR << 16;
4422 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
4423 "9037 FCP Completion Error: xri %x "
4424 "status x%x result x%x [x%x] "
4425 "placed x%x\n",
4426 lpfc_cmd->cur_iocbq.sli4_xritag,
4427 lpfc_cmd->status, lpfc_cmd->result,
4428 wcqe->parameter,
4429 wcqe->total_data_placed);
4430 }
4431 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4432 u32 *lp = (u32 *)cmd->sense_buffer;
4433
4434 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4435 "9039 Iodone <%d/%llu> cmd x%px, error "
4436 "x%x SNS x%x x%x Data: x%x x%x\n",
4437 cmd->device->id, cmd->device->lun, cmd,
4438 cmd->result, *lp, *(lp + 3), cmd->retries,
4439 scsi_get_resid(cmd));
4440 }
4441
4442 lpfc_update_stats(vport, lpfc_cmd);
4443
4444 if (vport->cfg_max_scsicmpl_time &&
4445 time_after(jiffies, lpfc_cmd->start_time +
4446 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4447 spin_lock_irqsave(shost->host_lock, flags);
4448 if (ndlp) {
4449 if (ndlp->cmd_qdepth >
4450 atomic_read(&ndlp->cmd_pending) &&
4451 (atomic_read(&ndlp->cmd_pending) >
4452 LPFC_MIN_TGT_QDEPTH) &&
4453 (cmd->cmnd[0] == READ_10 ||
4454 cmd->cmnd[0] == WRITE_10))
4455 ndlp->cmd_qdepth =
4456 atomic_read(&ndlp->cmd_pending);
4457
4458 ndlp->last_change_time = jiffies;
4459 }
4460 spin_unlock_irqrestore(shost->host_lock, flags);
4461 }
4462 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4463
4464 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4465 if (lpfc_cmd->ts_cmd_start) {
4466 lpfc_cmd->ts_isr_cmpl = lpfc_cmd->cur_iocbq.isr_timestamp;
4467 lpfc_cmd->ts_data_io = ktime_get_ns();
4468 phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
4469 lpfc_io_ktime(phba, lpfc_cmd);
4470 }
4471 #endif
4472 if (likely(!wait_xb_clr))
4473 lpfc_cmd->pCmd = NULL;
4474 spin_unlock(&lpfc_cmd->buf_lock);
4475
4476 /* Check if IO qualified for CMF */
4477 if (phba->cmf_active_mode != LPFC_CFG_OFF &&
4478 cmd->sc_data_direction == DMA_FROM_DEVICE &&
4479 (scsi_sg_count(cmd))) {
4480 /* Used when calculating average latency */
4481 lat = ktime_get_ns() - lpfc_cmd->rx_cmd_start;
4482 lpfc_update_cmf_cmpl(phba, lat, scsi_bufflen(cmd), shost);
4483 }
4484
4485 if (wait_xb_clr)
4486 goto out;
4487
4488 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4489 cmd->scsi_done(cmd);
4490
4491 /*
4492 * If there is an abort thread waiting for command completion
4493 * wake up the thread.
4494 */
4495 spin_lock(&lpfc_cmd->buf_lock);
4496 lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
4497 if (lpfc_cmd->waitq)
4498 wake_up(lpfc_cmd->waitq);
4499 spin_unlock(&lpfc_cmd->buf_lock);
4500 out:
4501 lpfc_release_scsi_buf(phba, lpfc_cmd);
4502 }
4503
4504 /**
4505 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
4506 * @phba: The Hba for which this call is being executed.
4507 * @pIocbIn: The command IOCBQ for the scsi cmnd.
4508 * @pIocbOut: The response IOCBQ for the scsi cmnd.
4509 *
4510 * This routine assigns scsi command result by looking into response IOCB
4511 * status field appropriately. This routine handles QUEUE FULL condition as
4512 * well by ramping down device queue depth.
4513 **/
4514 static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba * phba,struct lpfc_iocbq * pIocbIn,struct lpfc_iocbq * pIocbOut)4515 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
4516 struct lpfc_iocbq *pIocbOut)
4517 {
4518 struct lpfc_io_buf *lpfc_cmd =
4519 (struct lpfc_io_buf *) pIocbIn->context1;
4520 struct lpfc_vport *vport = pIocbIn->vport;
4521 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4522 struct lpfc_nodelist *pnode = rdata->pnode;
4523 struct scsi_cmnd *cmd;
4524 unsigned long flags;
4525 struct lpfc_fast_path_event *fast_path_evt;
4526 struct Scsi_Host *shost;
4527 int idx;
4528 uint32_t logit = LOG_FCP;
4529
4530 /* Guard against abort handler being called at same time */
4531 spin_lock(&lpfc_cmd->buf_lock);
4532
4533 /* Sanity check on return of outstanding command */
4534 cmd = lpfc_cmd->pCmd;
4535 if (!cmd || !phba) {
4536 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4537 "2621 IO completion: Not an active IO\n");
4538 spin_unlock(&lpfc_cmd->buf_lock);
4539 return;
4540 }
4541
4542 idx = lpfc_cmd->cur_iocbq.hba_wqidx;
4543 if (phba->sli4_hba.hdwq)
4544 phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
4545
4546 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4547 if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
4548 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
4549 #endif
4550 shost = cmd->device->host;
4551
4552 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
4553 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
4554 /* pick up SLI4 exchange busy status from HBA */
4555 lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
4556 if (pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY)
4557 lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
4558
4559 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4560 if (lpfc_cmd->prot_data_type) {
4561 struct scsi_dif_tuple *src = NULL;
4562
4563 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4564 /*
4565 * Used to restore any changes to protection
4566 * data for error injection.
4567 */
4568 switch (lpfc_cmd->prot_data_type) {
4569 case LPFC_INJERR_REFTAG:
4570 src->ref_tag =
4571 lpfc_cmd->prot_data;
4572 break;
4573 case LPFC_INJERR_APPTAG:
4574 src->app_tag =
4575 (uint16_t)lpfc_cmd->prot_data;
4576 break;
4577 case LPFC_INJERR_GUARD:
4578 src->guard_tag =
4579 (uint16_t)lpfc_cmd->prot_data;
4580 break;
4581 default:
4582 break;
4583 }
4584
4585 lpfc_cmd->prot_data = 0;
4586 lpfc_cmd->prot_data_type = 0;
4587 lpfc_cmd->prot_data_segment = NULL;
4588 }
4589 #endif
4590
4591 if (unlikely(lpfc_cmd->status)) {
4592 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4593 (lpfc_cmd->result & IOERR_DRVR_MASK))
4594 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4595 else if (lpfc_cmd->status >= IOSTAT_CNT)
4596 lpfc_cmd->status = IOSTAT_DEFAULT;
4597 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4598 !lpfc_cmd->fcp_rsp->rspStatus3 &&
4599 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4600 !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4601 logit = 0;
4602 else
4603 logit = LOG_FCP | LOG_FCP_UNDER;
4604 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4605 "9030 FCP cmd x%x failed <%d/%lld> "
4606 "status: x%x result: x%x "
4607 "sid: x%x did: x%x oxid: x%x "
4608 "Data: x%x x%x\n",
4609 cmd->cmnd[0],
4610 cmd->device ? cmd->device->id : 0xffff,
4611 cmd->device ? cmd->device->lun : 0xffff,
4612 lpfc_cmd->status, lpfc_cmd->result,
4613 vport->fc_myDID,
4614 (pnode) ? pnode->nlp_DID : 0,
4615 phba->sli_rev == LPFC_SLI_REV4 ?
4616 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4617 pIocbOut->iocb.ulpContext,
4618 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4619
4620 switch (lpfc_cmd->status) {
4621 case IOSTAT_FCP_RSP_ERROR:
4622 /* Call FCP RSP handler to determine result */
4623 lpfc_handle_fcp_err(vport, lpfc_cmd,
4624 pIocbOut->iocb.un.fcpi.fcpi_parm);
4625 break;
4626 case IOSTAT_NPORT_BSY:
4627 case IOSTAT_FABRIC_BSY:
4628 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4629 fast_path_evt = lpfc_alloc_fast_evt(phba);
4630 if (!fast_path_evt)
4631 break;
4632 fast_path_evt->un.fabric_evt.event_type =
4633 FC_REG_FABRIC_EVENT;
4634 fast_path_evt->un.fabric_evt.subcategory =
4635 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4636 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4637 if (pnode) {
4638 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4639 &pnode->nlp_portname,
4640 sizeof(struct lpfc_name));
4641 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4642 &pnode->nlp_nodename,
4643 sizeof(struct lpfc_name));
4644 }
4645 fast_path_evt->vport = vport;
4646 fast_path_evt->work_evt.evt =
4647 LPFC_EVT_FASTPATH_MGMT_EVT;
4648 spin_lock_irqsave(&phba->hbalock, flags);
4649 list_add_tail(&fast_path_evt->work_evt.evt_listp,
4650 &phba->work_list);
4651 spin_unlock_irqrestore(&phba->hbalock, flags);
4652 lpfc_worker_wake_up(phba);
4653 break;
4654 case IOSTAT_LOCAL_REJECT:
4655 case IOSTAT_REMOTE_STOP:
4656 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4657 lpfc_cmd->result ==
4658 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4659 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4660 lpfc_cmd->result ==
4661 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4662 cmd->result = DID_NO_CONNECT << 16;
4663 break;
4664 }
4665 if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4666 lpfc_cmd->result == IOERR_NO_RESOURCES ||
4667 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4668 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4669 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4670 break;
4671 }
4672 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4673 lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4674 pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4675 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4676 /*
4677 * This is a response for a BG enabled
4678 * cmd. Parse BG error
4679 */
4680 lpfc_parse_bg_err(phba, lpfc_cmd,
4681 pIocbOut);
4682 break;
4683 } else {
4684 lpfc_printf_vlog(vport, KERN_WARNING,
4685 LOG_BG,
4686 "9031 non-zero BGSTAT "
4687 "on unprotected cmd\n");
4688 }
4689 }
4690 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4691 && (phba->sli_rev == LPFC_SLI_REV4)
4692 && pnode) {
4693 /* This IO was aborted by the target, we don't
4694 * know the rxid and because we did not send the
4695 * ABTS we cannot generate and RRQ.
4696 */
4697 lpfc_set_rrq_active(phba, pnode,
4698 lpfc_cmd->cur_iocbq.sli4_lxritag,
4699 0, 0);
4700 }
4701 fallthrough;
4702 default:
4703 cmd->result = DID_ERROR << 16;
4704 break;
4705 }
4706
4707 if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4708 cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
4709 SAM_STAT_BUSY;
4710 } else
4711 cmd->result = DID_OK << 16;
4712
4713 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4714 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4715
4716 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4717 "0710 Iodone <%d/%llu> cmd x%px, error "
4718 "x%x SNS x%x x%x Data: x%x x%x\n",
4719 cmd->device->id, cmd->device->lun, cmd,
4720 cmd->result, *lp, *(lp + 3), cmd->retries,
4721 scsi_get_resid(cmd));
4722 }
4723
4724 lpfc_update_stats(vport, lpfc_cmd);
4725 if (vport->cfg_max_scsicmpl_time &&
4726 time_after(jiffies, lpfc_cmd->start_time +
4727 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4728 spin_lock_irqsave(shost->host_lock, flags);
4729 if (pnode) {
4730 if (pnode->cmd_qdepth >
4731 atomic_read(&pnode->cmd_pending) &&
4732 (atomic_read(&pnode->cmd_pending) >
4733 LPFC_MIN_TGT_QDEPTH) &&
4734 ((cmd->cmnd[0] == READ_10) ||
4735 (cmd->cmnd[0] == WRITE_10)))
4736 pnode->cmd_qdepth =
4737 atomic_read(&pnode->cmd_pending);
4738
4739 pnode->last_change_time = jiffies;
4740 }
4741 spin_unlock_irqrestore(shost->host_lock, flags);
4742 }
4743 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4744
4745 lpfc_cmd->pCmd = NULL;
4746 spin_unlock(&lpfc_cmd->buf_lock);
4747
4748 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4749 if (lpfc_cmd->ts_cmd_start) {
4750 lpfc_cmd->ts_isr_cmpl = pIocbIn->isr_timestamp;
4751 lpfc_cmd->ts_data_io = ktime_get_ns();
4752 phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
4753 lpfc_io_ktime(phba, lpfc_cmd);
4754 }
4755 #endif
4756
4757 /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4758 cmd->scsi_done(cmd);
4759
4760 /*
4761 * If there is an abort thread waiting for command completion
4762 * wake up the thread.
4763 */
4764 spin_lock(&lpfc_cmd->buf_lock);
4765 lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
4766 if (lpfc_cmd->waitq)
4767 wake_up(lpfc_cmd->waitq);
4768 spin_unlock(&lpfc_cmd->buf_lock);
4769
4770 lpfc_release_scsi_buf(phba, lpfc_cmd);
4771 }
4772
4773 /**
4774 * lpfc_scsi_prep_cmnd_buf_s3 - SLI-3 IOCB init for the IO
4775 * @vport: Pointer to vport object.
4776 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
4777 * @tmo: timeout value for the IO
4778 *
4779 * Based on the data-direction of the command, initialize IOCB
4780 * in the I/O buffer. Fill in the IOCB fields which are independent
4781 * of the scsi buffer
4782 *
4783 * RETURNS 0 - SUCCESS,
4784 **/
lpfc_scsi_prep_cmnd_buf_s3(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint8_t tmo)4785 static int lpfc_scsi_prep_cmnd_buf_s3(struct lpfc_vport *vport,
4786 struct lpfc_io_buf *lpfc_cmd,
4787 uint8_t tmo)
4788 {
4789 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4790 struct lpfc_iocbq *piocbq = &lpfc_cmd->cur_iocbq;
4791 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4792 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4793 struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
4794 int datadir = scsi_cmnd->sc_data_direction;
4795 u32 fcpdl;
4796
4797 piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4798
4799 /*
4800 * There are three possibilities here - use scatter-gather segment, use
4801 * the single mapping, or neither. Start the lpfc command prep by
4802 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4803 * data bde entry.
4804 */
4805 if (scsi_sg_count(scsi_cmnd)) {
4806 if (datadir == DMA_TO_DEVICE) {
4807 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4808 iocb_cmd->ulpPU = PARM_READ_CHECK;
4809 if (vport->cfg_first_burst_size &&
4810 (pnode->nlp_flag & NLP_FIRSTBURST)) {
4811 u32 xrdy_len;
4812
4813 fcpdl = scsi_bufflen(scsi_cmnd);
4814 xrdy_len = min(fcpdl,
4815 vport->cfg_first_burst_size);
4816 piocbq->iocb.un.fcpi.fcpi_XRdy = xrdy_len;
4817 }
4818 fcp_cmnd->fcpCntl3 = WRITE_DATA;
4819 } else {
4820 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4821 iocb_cmd->ulpPU = PARM_READ_CHECK;
4822 fcp_cmnd->fcpCntl3 = READ_DATA;
4823 }
4824 } else {
4825 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4826 iocb_cmd->un.fcpi.fcpi_parm = 0;
4827 iocb_cmd->ulpPU = 0;
4828 fcp_cmnd->fcpCntl3 = 0;
4829 }
4830
4831 /*
4832 * Finish initializing those IOCB fields that are independent
4833 * of the scsi_cmnd request_buffer
4834 */
4835 piocbq->iocb.ulpContext = pnode->nlp_rpi;
4836 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4837 piocbq->iocb.ulpFCP2Rcvy = 1;
4838 else
4839 piocbq->iocb.ulpFCP2Rcvy = 0;
4840
4841 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4842 piocbq->context1 = lpfc_cmd;
4843 if (!piocbq->iocb_cmpl)
4844 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4845 piocbq->iocb.ulpTimeout = tmo;
4846 piocbq->vport = vport;
4847 return 0;
4848 }
4849
4850 /**
4851 * lpfc_scsi_prep_cmnd_buf_s4 - SLI-4 WQE init for the IO
4852 * @vport: Pointer to vport object.
4853 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
4854 * @tmo: timeout value for the IO
4855 *
4856 * Based on the data-direction of the command copy WQE template
4857 * to I/O buffer WQE. Fill in the WQE fields which are independent
4858 * of the scsi buffer
4859 *
4860 * RETURNS 0 - SUCCESS,
4861 **/
lpfc_scsi_prep_cmnd_buf_s4(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint8_t tmo)4862 static int lpfc_scsi_prep_cmnd_buf_s4(struct lpfc_vport *vport,
4863 struct lpfc_io_buf *lpfc_cmd,
4864 uint8_t tmo)
4865 {
4866 struct lpfc_hba *phba = vport->phba;
4867 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4868 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4869 struct lpfc_sli4_hdw_queue *hdwq = NULL;
4870 struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
4871 struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
4872 union lpfc_wqe128 *wqe = &pwqeq->wqe;
4873 u16 idx = lpfc_cmd->hdwq_no;
4874 int datadir = scsi_cmnd->sc_data_direction;
4875
4876 hdwq = &phba->sli4_hba.hdwq[idx];
4877
4878 /* Initialize 64 bytes only */
4879 memset(wqe, 0, sizeof(union lpfc_wqe128));
4880
4881 /*
4882 * There are three possibilities here - use scatter-gather segment, use
4883 * the single mapping, or neither.
4884 */
4885 if (scsi_sg_count(scsi_cmnd)) {
4886 if (datadir == DMA_TO_DEVICE) {
4887 /* From the iwrite template, initialize words 7 - 11 */
4888 memcpy(&wqe->words[7],
4889 &lpfc_iwrite_cmd_template.words[7],
4890 sizeof(uint32_t) * 5);
4891
4892 fcp_cmnd->fcpCntl3 = WRITE_DATA;
4893 if (hdwq)
4894 hdwq->scsi_cstat.output_requests++;
4895 } else {
4896 /* From the iread template, initialize words 7 - 11 */
4897 memcpy(&wqe->words[7],
4898 &lpfc_iread_cmd_template.words[7],
4899 sizeof(uint32_t) * 5);
4900
4901 /* Word 7 */
4902 bf_set(wqe_tmo, &wqe->fcp_iread.wqe_com, tmo);
4903
4904 fcp_cmnd->fcpCntl3 = READ_DATA;
4905 if (hdwq)
4906 hdwq->scsi_cstat.input_requests++;
4907
4908 /* For a CMF Managed port, iod must be zero'ed */
4909 if (phba->cmf_active_mode == LPFC_CFG_MANAGED)
4910 bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
4911 LPFC_WQE_IOD_NONE);
4912 }
4913 } else {
4914 /* From the icmnd template, initialize words 4 - 11 */
4915 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
4916 sizeof(uint32_t) * 8);
4917
4918 /* Word 7 */
4919 bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, tmo);
4920
4921 fcp_cmnd->fcpCntl3 = 0;
4922 if (hdwq)
4923 hdwq->scsi_cstat.control_requests++;
4924 }
4925
4926 /*
4927 * Finish initializing those WQE fields that are independent
4928 * of the request_buffer
4929 */
4930
4931 /* Word 3 */
4932 bf_set(payload_offset_len, &wqe->fcp_icmd,
4933 sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
4934
4935 /* Word 6 */
4936 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
4937 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
4938 bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
4939
4940 /* Word 7*/
4941 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4942 bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
4943
4944 bf_set(wqe_class, &wqe->generic.wqe_com,
4945 (pnode->nlp_fcp_info & 0x0f));
4946
4947 /* Word 8 */
4948 wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
4949
4950 /* Word 9 */
4951 bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
4952
4953 pwqeq->vport = vport;
4954 pwqeq->vport = vport;
4955 pwqeq->context1 = lpfc_cmd;
4956 pwqeq->hba_wqidx = lpfc_cmd->hdwq_no;
4957 pwqeq->wqe_cmpl = lpfc_fcp_io_cmd_wqe_cmpl;
4958
4959 return 0;
4960 }
4961
4962 /**
4963 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4964 * @vport: The virtual port for which this call is being executed.
4965 * @lpfc_cmd: The scsi command which needs to send.
4966 * @pnode: Pointer to lpfc_nodelist.
4967 *
4968 * This routine initializes fcp_cmnd and iocb data structure from scsi command
4969 * to transfer for device with SLI3 interface spec.
4970 **/
4971 static int
lpfc_scsi_prep_cmnd(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,struct lpfc_nodelist * pnode)4972 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
4973 struct lpfc_nodelist *pnode)
4974 {
4975 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4976 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4977 u8 *ptr;
4978
4979 if (!pnode)
4980 return 0;
4981
4982 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4983 /* clear task management bits */
4984 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4985
4986 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4987 &lpfc_cmd->fcp_cmnd->fcp_lun);
4988
4989 ptr = &fcp_cmnd->fcpCdb[0];
4990 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4991 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4992 ptr += scsi_cmnd->cmd_len;
4993 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4994 }
4995
4996 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4997
4998 lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, lpfc_cmd->timeout);
4999
5000 return 0;
5001 }
5002
5003 /**
5004 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
5005 * @vport: The virtual port for which this call is being executed.
5006 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
5007 * @lun: Logical unit number.
5008 * @task_mgmt_cmd: SCSI task management command.
5009 *
5010 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
5011 * for device with SLI-3 interface spec.
5012 *
5013 * Return codes:
5014 * 0 - Error
5015 * 1 - Success
5016 **/
5017 static int
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd,uint64_t lun,uint8_t task_mgmt_cmd)5018 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
5019 struct lpfc_io_buf *lpfc_cmd,
5020 uint64_t lun,
5021 uint8_t task_mgmt_cmd)
5022 {
5023 struct lpfc_iocbq *piocbq;
5024 IOCB_t *piocb;
5025 struct fcp_cmnd *fcp_cmnd;
5026 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
5027 struct lpfc_nodelist *ndlp = rdata->pnode;
5028
5029 if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE)
5030 return 0;
5031
5032 piocbq = &(lpfc_cmd->cur_iocbq);
5033 piocbq->vport = vport;
5034
5035 piocb = &piocbq->iocb;
5036
5037 fcp_cmnd = lpfc_cmd->fcp_cmnd;
5038 /* Clear out any old data in the FCP command area */
5039 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
5040 int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
5041 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
5042 if (vport->phba->sli_rev == 3 &&
5043 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
5044 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
5045 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
5046 piocb->ulpContext = ndlp->nlp_rpi;
5047 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
5048 piocb->ulpContext =
5049 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
5050 }
5051 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
5052 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
5053 piocb->ulpPU = 0;
5054 piocb->un.fcpi.fcpi_parm = 0;
5055
5056 /* ulpTimeout is only one byte */
5057 if (lpfc_cmd->timeout > 0xff) {
5058 /*
5059 * Do not timeout the command at the firmware level.
5060 * The driver will provide the timeout mechanism.
5061 */
5062 piocb->ulpTimeout = 0;
5063 } else
5064 piocb->ulpTimeout = lpfc_cmd->timeout;
5065
5066 if (vport->phba->sli_rev == LPFC_SLI_REV4)
5067 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
5068
5069 return 1;
5070 }
5071
5072 /**
5073 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
5074 * @phba: The hba struct for which this call is being executed.
5075 * @dev_grp: The HBA PCI-Device group number.
5076 *
5077 * This routine sets up the SCSI interface API function jump table in @phba
5078 * struct.
5079 * Returns: 0 - success, -ENODEV - failure.
5080 **/
5081 int
lpfc_scsi_api_table_setup(struct lpfc_hba * phba,uint8_t dev_grp)5082 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
5083 {
5084
5085 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
5086
5087 switch (dev_grp) {
5088 case LPFC_PCI_DEV_LP:
5089 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
5090 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
5091 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
5092 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
5093 phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s3;
5094 break;
5095 case LPFC_PCI_DEV_OC:
5096 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
5097 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
5098 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
5099 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
5100 phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s4;
5101 break;
5102 default:
5103 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5104 "1418 Invalid HBA PCI-device group: 0x%x\n",
5105 dev_grp);
5106 return -ENODEV;
5107 }
5108 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
5109 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
5110 return 0;
5111 }
5112
5113 /**
5114 * lpfc_tskmgmt_def_cmpl - IOCB completion routine for task management command
5115 * @phba: The Hba for which this call is being executed.
5116 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
5117 * @rspiocbq: Pointer to lpfc_iocbq data structure.
5118 *
5119 * This routine is IOCB completion routine for device reset and target reset
5120 * routine. This routine release scsi buffer associated with lpfc_cmd.
5121 **/
5122 static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba * phba,struct lpfc_iocbq * cmdiocbq,struct lpfc_iocbq * rspiocbq)5123 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
5124 struct lpfc_iocbq *cmdiocbq,
5125 struct lpfc_iocbq *rspiocbq)
5126 {
5127 struct lpfc_io_buf *lpfc_cmd =
5128 (struct lpfc_io_buf *) cmdiocbq->context1;
5129 if (lpfc_cmd)
5130 lpfc_release_scsi_buf(phba, lpfc_cmd);
5131 return;
5132 }
5133
5134 /**
5135 * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
5136 * if issuing a pci_bus_reset is possibly unsafe
5137 * @phba: lpfc_hba pointer.
5138 *
5139 * Description:
5140 * Walks the bus_list to ensure only PCI devices with Emulex
5141 * vendor id, device ids that support hot reset, and only one occurrence
5142 * of function 0.
5143 *
5144 * Returns:
5145 * -EBADSLT, detected invalid device
5146 * 0, successful
5147 */
5148 int
lpfc_check_pci_resettable(struct lpfc_hba * phba)5149 lpfc_check_pci_resettable(struct lpfc_hba *phba)
5150 {
5151 const struct pci_dev *pdev = phba->pcidev;
5152 struct pci_dev *ptr = NULL;
5153 u8 counter = 0;
5154
5155 /* Walk the list of devices on the pci_dev's bus */
5156 list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
5157 /* Check for Emulex Vendor ID */
5158 if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
5159 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
5160 "8346 Non-Emulex vendor found: "
5161 "0x%04x\n", ptr->vendor);
5162 return -EBADSLT;
5163 }
5164
5165 /* Check for valid Emulex Device ID */
5166 if (phba->sli_rev != LPFC_SLI_REV4 ||
5167 phba->hba_flag & HBA_FCOE_MODE) {
5168 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
5169 "8347 Incapable PCI reset device: "
5170 "0x%04x\n", ptr->device);
5171 return -EBADSLT;
5172 }
5173
5174 /* Check for only one function 0 ID to ensure only one HBA on
5175 * secondary bus
5176 */
5177 if (ptr->devfn == 0) {
5178 if (++counter > 1) {
5179 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
5180 "8348 More than one device on "
5181 "secondary bus found\n");
5182 return -EBADSLT;
5183 }
5184 }
5185 }
5186
5187 return 0;
5188 }
5189
5190 /**
5191 * lpfc_info - Info entry point of scsi_host_template data structure
5192 * @host: The scsi host for which this call is being executed.
5193 *
5194 * This routine provides module information about hba.
5195 *
5196 * Reutrn code:
5197 * Pointer to char - Success.
5198 **/
5199 const char *
lpfc_info(struct Scsi_Host * host)5200 lpfc_info(struct Scsi_Host *host)
5201 {
5202 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
5203 struct lpfc_hba *phba = vport->phba;
5204 int link_speed = 0;
5205 static char lpfcinfobuf[384];
5206 char tmp[384] = {0};
5207
5208 memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
5209 if (phba && phba->pcidev){
5210 /* Model Description */
5211 scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
5212 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
5213 sizeof(lpfcinfobuf))
5214 goto buffer_done;
5215
5216 /* PCI Info */
5217 scnprintf(tmp, sizeof(tmp),
5218 " on PCI bus %02x device %02x irq %d",
5219 phba->pcidev->bus->number, phba->pcidev->devfn,
5220 phba->pcidev->irq);
5221 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
5222 sizeof(lpfcinfobuf))
5223 goto buffer_done;
5224
5225 /* Port Number */
5226 if (phba->Port[0]) {
5227 scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
5228 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
5229 sizeof(lpfcinfobuf))
5230 goto buffer_done;
5231 }
5232
5233 /* Link Speed */
5234 link_speed = lpfc_sli_port_speed_get(phba);
5235 if (link_speed != 0) {
5236 scnprintf(tmp, sizeof(tmp),
5237 " Logical Link Speed: %d Mbps", link_speed);
5238 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
5239 sizeof(lpfcinfobuf))
5240 goto buffer_done;
5241 }
5242
5243 /* PCI resettable */
5244 if (!lpfc_check_pci_resettable(phba)) {
5245 scnprintf(tmp, sizeof(tmp), " PCI resettable");
5246 strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
5247 }
5248 }
5249
5250 buffer_done:
5251 return lpfcinfobuf;
5252 }
5253
5254 /**
5255 * lpfc_poll_rearm_timer - Routine to modify fcp_poll timer of hba
5256 * @phba: The Hba for which this call is being executed.
5257 *
5258 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
5259 * The default value of cfg_poll_tmo is 10 milliseconds.
5260 **/
lpfc_poll_rearm_timer(struct lpfc_hba * phba)5261 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
5262 {
5263 unsigned long poll_tmo_expires =
5264 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
5265
5266 if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
5267 mod_timer(&phba->fcp_poll_timer,
5268 poll_tmo_expires);
5269 }
5270
5271 /**
5272 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
5273 * @phba: The Hba for which this call is being executed.
5274 *
5275 * This routine starts the fcp_poll_timer of @phba.
5276 **/
lpfc_poll_start_timer(struct lpfc_hba * phba)5277 void lpfc_poll_start_timer(struct lpfc_hba * phba)
5278 {
5279 lpfc_poll_rearm_timer(phba);
5280 }
5281
5282 /**
5283 * lpfc_poll_timeout - Restart polling timer
5284 * @t: Timer construct where lpfc_hba data structure pointer is obtained.
5285 *
5286 * This routine restarts fcp_poll timer, when FCP ring polling is enable
5287 * and FCP Ring interrupt is disable.
5288 **/
lpfc_poll_timeout(struct timer_list * t)5289 void lpfc_poll_timeout(struct timer_list *t)
5290 {
5291 struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
5292
5293 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5294 lpfc_sli_handle_fast_ring_event(phba,
5295 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5296
5297 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5298 lpfc_poll_rearm_timer(phba);
5299 }
5300 }
5301
5302 /*
5303 * lpfc_get_vmid_from_hashtable - search the UUID in the hash table
5304 * @vport: The virtual port for which this call is being executed.
5305 * @hash: calculated hash value
5306 * @buf: uuid associated with the VE
5307 * Return the VMID entry associated with the UUID
5308 * Make sure to acquire the appropriate lock before invoking this routine.
5309 */
lpfc_get_vmid_from_hashtable(struct lpfc_vport * vport,u32 hash,u8 * buf)5310 struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
5311 u32 hash, u8 *buf)
5312 {
5313 struct lpfc_vmid *vmp;
5314
5315 hash_for_each_possible(vport->hash_table, vmp, hnode, hash) {
5316 if (memcmp(&vmp->host_vmid[0], buf, 16) == 0)
5317 return vmp;
5318 }
5319 return NULL;
5320 }
5321
5322 /*
5323 * lpfc_put_vmid_in_hashtable - put the VMID in the hash table
5324 * @vport: The virtual port for which this call is being executed.
5325 * @hash - calculated hash value
5326 * @vmp: Pointer to a VMID entry representing a VM sending I/O
5327 *
5328 * This routine will insert the newly acquired VMID entity in the hash table.
5329 * Make sure to acquire the appropriate lock before invoking this routine.
5330 */
5331 static void
lpfc_put_vmid_in_hashtable(struct lpfc_vport * vport,u32 hash,struct lpfc_vmid * vmp)5332 lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
5333 struct lpfc_vmid *vmp)
5334 {
5335 hash_add(vport->hash_table, &vmp->hnode, hash);
5336 }
5337
5338 /*
5339 * lpfc_vmid_hash_fn - create a hash value of the UUID
5340 * @vmid: uuid associated with the VE
5341 * @len: length of the VMID string
5342 * Returns the calculated hash value
5343 */
lpfc_vmid_hash_fn(const char * vmid,int len)5344 int lpfc_vmid_hash_fn(const char *vmid, int len)
5345 {
5346 int c;
5347 int hash = 0;
5348
5349 if (len == 0)
5350 return 0;
5351 while (len--) {
5352 c = *vmid++;
5353 if (c >= 'A' && c <= 'Z')
5354 c += 'a' - 'A';
5355
5356 hash = (hash + (c << LPFC_VMID_HASH_SHIFT) +
5357 (c >> LPFC_VMID_HASH_SHIFT)) * 19;
5358 }
5359
5360 return hash & LPFC_VMID_HASH_MASK;
5361 }
5362
5363 /*
5364 * lpfc_vmid_update_entry - update the vmid entry in the hash table
5365 * @vport: The virtual port for which this call is being executed.
5366 * @cmd: address of scsi cmd descriptor
5367 * @vmp: Pointer to a VMID entry representing a VM sending I/O
5368 * @tag: VMID tag
5369 */
lpfc_vmid_update_entry(struct lpfc_vport * vport,struct scsi_cmnd * cmd,struct lpfc_vmid * vmp,union lpfc_vmid_io_tag * tag)5370 static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
5371 *cmd, struct lpfc_vmid *vmp,
5372 union lpfc_vmid_io_tag *tag)
5373 {
5374 u64 *lta;
5375
5376 if (vport->vmid_priority_tagging)
5377 tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid;
5378 else
5379 tag->app_id = vmp->un.app_id;
5380
5381 if (cmd->sc_data_direction == DMA_TO_DEVICE)
5382 vmp->io_wr_cnt++;
5383 else
5384 vmp->io_rd_cnt++;
5385
5386 /* update the last access timestamp in the table */
5387 lta = per_cpu_ptr(vmp->last_io_time, raw_smp_processor_id());
5388 *lta = jiffies;
5389 }
5390
lpfc_vmid_assign_cs_ctl(struct lpfc_vport * vport,struct lpfc_vmid * vmid)5391 static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
5392 struct lpfc_vmid *vmid)
5393 {
5394 u32 hash;
5395 struct lpfc_vmid *pvmid;
5396
5397 if (vport->port_type == LPFC_PHYSICAL_PORT) {
5398 vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
5399 } else {
5400 hash = lpfc_vmid_hash_fn(vmid->host_vmid, vmid->vmid_len);
5401 pvmid =
5402 lpfc_get_vmid_from_hashtable(vport->phba->pport, hash,
5403 vmid->host_vmid);
5404 if (pvmid)
5405 vmid->un.cs_ctl_vmid = pvmid->un.cs_ctl_vmid;
5406 else
5407 vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
5408 }
5409 }
5410
5411 /*
5412 * lpfc_vmid_get_appid - get the VMID associated with the UUID
5413 * @vport: The virtual port for which this call is being executed.
5414 * @uuid: UUID associated with the VE
5415 * @cmd: address of scsi_cmd descriptor
5416 * @tag: VMID tag
5417 * Returns status of the function
5418 */
lpfc_vmid_get_appid(struct lpfc_vport * vport,char * uuid,struct scsi_cmnd * cmd,union lpfc_vmid_io_tag * tag)5419 static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
5420 scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag)
5421 {
5422 struct lpfc_vmid *vmp = NULL;
5423 int hash, len, rc, i;
5424
5425 /* check if QFPA is complete */
5426 if (lpfc_vmid_is_type_priority_tag(vport) && !(vport->vmid_flag &
5427 LPFC_VMID_QFPA_CMPL)) {
5428 vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
5429 return -EAGAIN;
5430 }
5431
5432 /* search if the UUID has already been mapped to the VMID */
5433 len = strlen(uuid);
5434 hash = lpfc_vmid_hash_fn(uuid, len);
5435
5436 /* search for the VMID in the table */
5437 read_lock(&vport->vmid_lock);
5438 vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
5439
5440 /* if found, check if its already registered */
5441 if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
5442 read_unlock(&vport->vmid_lock);
5443 lpfc_vmid_update_entry(vport, cmd, vmp, tag);
5444 rc = 0;
5445 } else if (vmp && (vmp->flag & LPFC_VMID_REQ_REGISTER ||
5446 vmp->flag & LPFC_VMID_DE_REGISTER)) {
5447 /* else if register or dereg request has already been sent */
5448 /* Hence VMID tag will not be added for this I/O */
5449 read_unlock(&vport->vmid_lock);
5450 rc = -EBUSY;
5451 } else {
5452 /* The VMID was not found in the hashtable. At this point, */
5453 /* drop the read lock first before proceeding further */
5454 read_unlock(&vport->vmid_lock);
5455 /* start the process to obtain one as per the */
5456 /* type of the VMID indicated */
5457 write_lock(&vport->vmid_lock);
5458 vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
5459
5460 /* while the read lock was released, in case the entry was */
5461 /* added by other context or is in process of being added */
5462 if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
5463 lpfc_vmid_update_entry(vport, cmd, vmp, tag);
5464 write_unlock(&vport->vmid_lock);
5465 return 0;
5466 } else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) {
5467 write_unlock(&vport->vmid_lock);
5468 return -EBUSY;
5469 }
5470
5471 /* else search and allocate a free slot in the hash table */
5472 if (vport->cur_vmid_cnt < vport->max_vmid) {
5473 for (i = 0; i < vport->max_vmid; i++) {
5474 vmp = vport->vmid + i;
5475 if (vmp->flag == LPFC_VMID_SLOT_FREE)
5476 break;
5477 }
5478 if (i == vport->max_vmid)
5479 vmp = NULL;
5480 } else {
5481 vmp = NULL;
5482 }
5483
5484 if (!vmp) {
5485 write_unlock(&vport->vmid_lock);
5486 return -ENOMEM;
5487 }
5488
5489 /* Add the vmid and register */
5490 lpfc_put_vmid_in_hashtable(vport, hash, vmp);
5491 vmp->vmid_len = len;
5492 memcpy(vmp->host_vmid, uuid, vmp->vmid_len);
5493 vmp->io_rd_cnt = 0;
5494 vmp->io_wr_cnt = 0;
5495 vmp->flag = LPFC_VMID_SLOT_USED;
5496
5497 vmp->delete_inactive =
5498 vport->vmid_inactivity_timeout ? 1 : 0;
5499
5500 /* if type priority tag, get next available VMID */
5501 if (lpfc_vmid_is_type_priority_tag(vport))
5502 lpfc_vmid_assign_cs_ctl(vport, vmp);
5503
5504 /* allocate the per cpu variable for holding */
5505 /* the last access time stamp only if VMID is enabled */
5506 if (!vmp->last_io_time)
5507 vmp->last_io_time = __alloc_percpu(sizeof(u64),
5508 __alignof__(struct
5509 lpfc_vmid));
5510 if (!vmp->last_io_time) {
5511 hash_del(&vmp->hnode);
5512 vmp->flag = LPFC_VMID_SLOT_FREE;
5513 write_unlock(&vport->vmid_lock);
5514 return -EIO;
5515 }
5516
5517 write_unlock(&vport->vmid_lock);
5518
5519 /* complete transaction with switch */
5520 if (lpfc_vmid_is_type_priority_tag(vport))
5521 rc = lpfc_vmid_uvem(vport, vmp, true);
5522 else
5523 rc = lpfc_vmid_cmd(vport, SLI_CTAS_RAPP_IDENT, vmp);
5524 if (!rc) {
5525 write_lock(&vport->vmid_lock);
5526 vport->cur_vmid_cnt++;
5527 vmp->flag |= LPFC_VMID_REQ_REGISTER;
5528 write_unlock(&vport->vmid_lock);
5529 } else {
5530 write_lock(&vport->vmid_lock);
5531 hash_del(&vmp->hnode);
5532 vmp->flag = LPFC_VMID_SLOT_FREE;
5533 free_percpu(vmp->last_io_time);
5534 write_unlock(&vport->vmid_lock);
5535 return -EIO;
5536 }
5537
5538 /* finally, enable the idle timer once */
5539 if (!(vport->phba->pport->vmid_flag & LPFC_VMID_TIMER_ENBLD)) {
5540 mod_timer(&vport->phba->inactive_vmid_poll,
5541 jiffies +
5542 msecs_to_jiffies(1000 * LPFC_VMID_TIMER));
5543 vport->phba->pport->vmid_flag |= LPFC_VMID_TIMER_ENBLD;
5544 }
5545 }
5546 return rc;
5547 }
5548
5549 /*
5550 * lpfc_is_command_vm_io - get the UUID from blk cgroup
5551 * @cmd: Pointer to scsi_cmnd data structure
5552 * Returns UUID if present, otherwise NULL
5553 */
lpfc_is_command_vm_io(struct scsi_cmnd * cmd)5554 static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd)
5555 {
5556 struct bio *bio = scsi_cmd_to_rq(cmd)->bio;
5557
5558 return bio ? blkcg_get_fc_appid(bio) : NULL;
5559 }
5560
5561 /**
5562 * lpfc_queuecommand - scsi_host_template queuecommand entry point
5563 * @shost: kernel scsi host pointer.
5564 * @cmnd: Pointer to scsi_cmnd data structure.
5565 *
5566 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
5567 * This routine prepares an IOCB from scsi command and provides to firmware.
5568 * The @done callback is invoked after driver finished processing the command.
5569 *
5570 * Return value :
5571 * 0 - Success
5572 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
5573 **/
5574 static int
lpfc_queuecommand(struct Scsi_Host * shost,struct scsi_cmnd * cmnd)5575 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
5576 {
5577 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5578 struct lpfc_hba *phba = vport->phba;
5579 struct lpfc_rport_data *rdata;
5580 struct lpfc_nodelist *ndlp;
5581 struct lpfc_io_buf *lpfc_cmd;
5582 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
5583 int err, idx;
5584 u8 *uuid = NULL;
5585 uint64_t start;
5586
5587 start = ktime_get_ns();
5588 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5589
5590 /* sanity check on references */
5591 if (unlikely(!rdata) || unlikely(!rport))
5592 goto out_fail_command;
5593
5594 err = fc_remote_port_chkready(rport);
5595 if (err) {
5596 cmnd->result = err;
5597 goto out_fail_command;
5598 }
5599 ndlp = rdata->pnode;
5600
5601 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
5602 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
5603
5604 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5605 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
5606 " op:%02x str=%s without registering for"
5607 " BlockGuard - Rejecting command\n",
5608 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
5609 dif_op_str[scsi_get_prot_op(cmnd)]);
5610 goto out_fail_command;
5611 }
5612
5613 /*
5614 * Catch race where our node has transitioned, but the
5615 * transport is still transitioning.
5616 */
5617 if (!ndlp)
5618 goto out_tgt_busy1;
5619
5620 /* Check if IO qualifies for CMF */
5621 if (phba->cmf_active_mode != LPFC_CFG_OFF &&
5622 cmnd->sc_data_direction == DMA_FROM_DEVICE &&
5623 (scsi_sg_count(cmnd))) {
5624 /* Latency start time saved in rx_cmd_start later in routine */
5625 err = lpfc_update_cmf_cmd(phba, scsi_bufflen(cmnd));
5626 if (err)
5627 goto out_tgt_busy1;
5628 }
5629
5630 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
5631 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
5632 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
5633 "3377 Target Queue Full, scsi Id:%d "
5634 "Qdepth:%d Pending command:%d"
5635 " WWNN:%02x:%02x:%02x:%02x:"
5636 "%02x:%02x:%02x:%02x, "
5637 " WWPN:%02x:%02x:%02x:%02x:"
5638 "%02x:%02x:%02x:%02x",
5639 ndlp->nlp_sid, ndlp->cmd_qdepth,
5640 atomic_read(&ndlp->cmd_pending),
5641 ndlp->nlp_nodename.u.wwn[0],
5642 ndlp->nlp_nodename.u.wwn[1],
5643 ndlp->nlp_nodename.u.wwn[2],
5644 ndlp->nlp_nodename.u.wwn[3],
5645 ndlp->nlp_nodename.u.wwn[4],
5646 ndlp->nlp_nodename.u.wwn[5],
5647 ndlp->nlp_nodename.u.wwn[6],
5648 ndlp->nlp_nodename.u.wwn[7],
5649 ndlp->nlp_portname.u.wwn[0],
5650 ndlp->nlp_portname.u.wwn[1],
5651 ndlp->nlp_portname.u.wwn[2],
5652 ndlp->nlp_portname.u.wwn[3],
5653 ndlp->nlp_portname.u.wwn[4],
5654 ndlp->nlp_portname.u.wwn[5],
5655 ndlp->nlp_portname.u.wwn[6],
5656 ndlp->nlp_portname.u.wwn[7]);
5657 goto out_tgt_busy2;
5658 }
5659 }
5660
5661 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd);
5662 if (lpfc_cmd == NULL) {
5663 lpfc_rampdown_queue_depth(phba);
5664
5665 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
5666 "0707 driver's buffer pool is empty, "
5667 "IO busied\n");
5668 goto out_host_busy;
5669 }
5670 lpfc_cmd->rx_cmd_start = start;
5671
5672 /*
5673 * Store the midlayer's command structure for the completion phase
5674 * and complete the command initialization.
5675 */
5676 lpfc_cmd->pCmd = cmnd;
5677 lpfc_cmd->rdata = rdata;
5678 lpfc_cmd->ndlp = ndlp;
5679 lpfc_cmd->cur_iocbq.iocb_cmpl = NULL;
5680 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
5681
5682 err = lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
5683 if (err)
5684 goto out_host_busy_release_buf;
5685
5686 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
5687 if (vport->phba->cfg_enable_bg) {
5688 lpfc_printf_vlog(vport,
5689 KERN_INFO, LOG_SCSI_CMD,
5690 "9033 BLKGRD: rcvd %s cmd:x%x "
5691 "reftag x%x cnt %u pt %x\n",
5692 dif_op_str[scsi_get_prot_op(cmnd)],
5693 cmnd->cmnd[0],
5694 scsi_prot_ref_tag(cmnd),
5695 scsi_logical_block_count(cmnd),
5696 (cmnd->cmnd[1]>>5));
5697 }
5698 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
5699 } else {
5700 if (vport->phba->cfg_enable_bg) {
5701 lpfc_printf_vlog(vport,
5702 KERN_INFO, LOG_SCSI_CMD,
5703 "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
5704 "x%x reftag x%x cnt %u pt %x\n",
5705 cmnd->cmnd[0],
5706 scsi_prot_ref_tag(cmnd),
5707 scsi_logical_block_count(cmnd),
5708 (cmnd->cmnd[1]>>5));
5709 }
5710 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
5711 }
5712
5713 if (unlikely(err)) {
5714 if (err == 2) {
5715 cmnd->result = DID_ERROR << 16;
5716 goto out_fail_command_release_buf;
5717 }
5718 goto out_host_busy_free_buf;
5719 }
5720
5721
5722 /* check the necessary and sufficient condition to support VMID */
5723 if (lpfc_is_vmid_enabled(phba) &&
5724 (ndlp->vmid_support ||
5725 phba->pport->vmid_priority_tagging ==
5726 LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
5727 /* is the I/O generated by a VM, get the associated virtual */
5728 /* entity id */
5729 uuid = lpfc_is_command_vm_io(cmnd);
5730
5731 if (uuid) {
5732 err = lpfc_vmid_get_appid(vport, uuid, cmnd,
5733 (union lpfc_vmid_io_tag *)
5734 &lpfc_cmd->cur_iocbq.vmid_tag);
5735 if (!err)
5736 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_VMID;
5737 }
5738 }
5739
5740 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
5741 if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
5742 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
5743 #endif
5744 /* Issue I/O to adapter */
5745 err = lpfc_sli_issue_fcp_io(phba, LPFC_FCP_RING,
5746 &lpfc_cmd->cur_iocbq,
5747 SLI_IOCB_RET_IOCB);
5748 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
5749 if (start) {
5750 lpfc_cmd->ts_cmd_start = start;
5751 lpfc_cmd->ts_last_cmd = phba->ktime_last_cmd;
5752 lpfc_cmd->ts_cmd_wqput = ktime_get_ns();
5753 } else {
5754 lpfc_cmd->ts_cmd_start = 0;
5755 }
5756 #endif
5757 if (err) {
5758 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5759 "3376 FCP could not issue IOCB err %x "
5760 "FCP cmd x%x <%d/%llu> "
5761 "sid: x%x did: x%x oxid: x%x "
5762 "Data: x%x x%x x%x x%x\n",
5763 err, cmnd->cmnd[0],
5764 cmnd->device ? cmnd->device->id : 0xffff,
5765 cmnd->device ? cmnd->device->lun : (u64)-1,
5766 vport->fc_myDID, ndlp->nlp_DID,
5767 phba->sli_rev == LPFC_SLI_REV4 ?
5768 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
5769 phba->sli_rev == LPFC_SLI_REV4 ?
5770 phba->sli4_hba.rpi_ids[ndlp->nlp_rpi] :
5771 lpfc_cmd->cur_iocbq.iocb.ulpContext,
5772 lpfc_cmd->cur_iocbq.iotag,
5773 phba->sli_rev == LPFC_SLI_REV4 ?
5774 bf_get(wqe_tmo,
5775 &lpfc_cmd->cur_iocbq.wqe.generic.wqe_com) :
5776 lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
5777 (uint32_t)(scsi_cmd_to_rq(cmnd)->timeout / 1000));
5778
5779 goto out_host_busy_free_buf;
5780 }
5781
5782 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5783 lpfc_sli_handle_fast_ring_event(phba,
5784 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5785
5786 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5787 lpfc_poll_rearm_timer(phba);
5788 }
5789
5790 if (phba->cfg_xri_rebalancing)
5791 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no);
5792
5793 return 0;
5794
5795 out_host_busy_free_buf:
5796 idx = lpfc_cmd->hdwq_no;
5797 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
5798 if (phba->sli4_hba.hdwq) {
5799 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
5800 case WRITE_DATA:
5801 phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--;
5802 break;
5803 case READ_DATA:
5804 phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--;
5805 break;
5806 default:
5807 phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--;
5808 }
5809 }
5810 out_host_busy_release_buf:
5811 lpfc_release_scsi_buf(phba, lpfc_cmd);
5812 out_host_busy:
5813 lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
5814 shost);
5815 return SCSI_MLQUEUE_HOST_BUSY;
5816
5817 out_tgt_busy2:
5818 lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
5819 shost);
5820 out_tgt_busy1:
5821 return SCSI_MLQUEUE_TARGET_BUSY;
5822
5823 out_fail_command_release_buf:
5824 lpfc_release_scsi_buf(phba, lpfc_cmd);
5825 lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
5826 shost);
5827
5828 out_fail_command:
5829 cmnd->scsi_done(cmnd);
5830 return 0;
5831 }
5832
5833 /*
5834 * lpfc_vmid_vport_cleanup - cleans up the resources associated with a vport
5835 * @vport: The virtual port for which this call is being executed.
5836 */
lpfc_vmid_vport_cleanup(struct lpfc_vport * vport)5837 void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport)
5838 {
5839 u32 bucket;
5840 struct lpfc_vmid *cur;
5841
5842 if (vport->port_type == LPFC_PHYSICAL_PORT)
5843 del_timer_sync(&vport->phba->inactive_vmid_poll);
5844
5845 kfree(vport->qfpa_res);
5846 kfree(vport->vmid_priority.vmid_range);
5847 kfree(vport->vmid);
5848
5849 if (!hash_empty(vport->hash_table))
5850 hash_for_each(vport->hash_table, bucket, cur, hnode)
5851 hash_del(&cur->hnode);
5852
5853 vport->qfpa_res = NULL;
5854 vport->vmid_priority.vmid_range = NULL;
5855 vport->vmid = NULL;
5856 vport->cur_vmid_cnt = 0;
5857 }
5858
5859 /**
5860 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
5861 * @cmnd: Pointer to scsi_cmnd data structure.
5862 *
5863 * This routine aborts @cmnd pending in base driver.
5864 *
5865 * Return code :
5866 * 0x2003 - Error
5867 * 0x2002 - Success
5868 **/
5869 static int
lpfc_abort_handler(struct scsi_cmnd * cmnd)5870 lpfc_abort_handler(struct scsi_cmnd *cmnd)
5871 {
5872 struct Scsi_Host *shost = cmnd->device->host;
5873 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5874 struct lpfc_hba *phba = vport->phba;
5875 struct lpfc_iocbq *iocb;
5876 struct lpfc_io_buf *lpfc_cmd;
5877 int ret = SUCCESS, status = 0;
5878 struct lpfc_sli_ring *pring_s4 = NULL;
5879 struct lpfc_sli_ring *pring = NULL;
5880 int ret_val;
5881 unsigned long flags;
5882 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
5883
5884 status = fc_block_scsi_eh(cmnd);
5885 if (status != 0 && status != SUCCESS)
5886 return status;
5887
5888 lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble;
5889 if (!lpfc_cmd)
5890 return ret;
5891
5892 /* Guard against IO completion being called at same time */
5893 spin_lock_irqsave(&lpfc_cmd->buf_lock, flags);
5894
5895 spin_lock(&phba->hbalock);
5896 /* driver queued commands are in process of being flushed */
5897 if (phba->hba_flag & HBA_IOQ_FLUSH) {
5898 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5899 "3168 SCSI Layer abort requested I/O has been "
5900 "flushed by LLD.\n");
5901 ret = FAILED;
5902 goto out_unlock_hba;
5903 }
5904
5905 if (!lpfc_cmd->pCmd) {
5906 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5907 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
5908 "x%x ID %d LUN %llu\n",
5909 SUCCESS, cmnd->device->id, cmnd->device->lun);
5910 goto out_unlock_hba;
5911 }
5912
5913 iocb = &lpfc_cmd->cur_iocbq;
5914 if (phba->sli_rev == LPFC_SLI_REV4) {
5915 pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
5916 if (!pring_s4) {
5917 ret = FAILED;
5918 goto out_unlock_hba;
5919 }
5920 spin_lock(&pring_s4->ring_lock);
5921 }
5922 /* the command is in process of being cancelled */
5923 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
5924 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5925 "3169 SCSI Layer abort requested I/O has been "
5926 "cancelled by LLD.\n");
5927 ret = FAILED;
5928 goto out_unlock_ring;
5929 }
5930 /*
5931 * If pCmd field of the corresponding lpfc_io_buf structure
5932 * points to a different SCSI command, then the driver has
5933 * already completed this command, but the midlayer did not
5934 * see the completion before the eh fired. Just return SUCCESS.
5935 */
5936 if (lpfc_cmd->pCmd != cmnd) {
5937 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5938 "3170 SCSI Layer abort requested I/O has been "
5939 "completed by LLD.\n");
5940 goto out_unlock_ring;
5941 }
5942
5943 BUG_ON(iocb->context1 != lpfc_cmd);
5944
5945 /* abort issued in recovery is still in progress */
5946 if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
5947 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5948 "3389 SCSI Layer I/O Abort Request is pending\n");
5949 if (phba->sli_rev == LPFC_SLI_REV4)
5950 spin_unlock(&pring_s4->ring_lock);
5951 spin_unlock(&phba->hbalock);
5952 spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
5953 goto wait_for_cmpl;
5954 }
5955
5956 lpfc_cmd->waitq = &waitq;
5957 if (phba->sli_rev == LPFC_SLI_REV4) {
5958 spin_unlock(&pring_s4->ring_lock);
5959 ret_val = lpfc_sli4_issue_abort_iotag(phba, iocb,
5960 lpfc_sli4_abort_fcp_cmpl);
5961 } else {
5962 pring = &phba->sli.sli3_ring[LPFC_FCP_RING];
5963 ret_val = lpfc_sli_issue_abort_iotag(phba, pring, iocb,
5964 lpfc_sli_abort_fcp_cmpl);
5965 }
5966
5967 /* Make sure HBA is alive */
5968 lpfc_issue_hb_tmo(phba);
5969
5970 if (ret_val != IOCB_SUCCESS) {
5971 /* Indicate the IO is not being aborted by the driver. */
5972 lpfc_cmd->waitq = NULL;
5973 ret = FAILED;
5974 goto out_unlock_hba;
5975 }
5976
5977 /* no longer need the lock after this point */
5978 spin_unlock(&phba->hbalock);
5979 spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
5980
5981 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5982 lpfc_sli_handle_fast_ring_event(phba,
5983 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5984
5985 wait_for_cmpl:
5986 /*
5987 * iocb_flag is set to LPFC_DRIVER_ABORTED before we wait
5988 * for abort to complete.
5989 */
5990 wait_event_timeout(waitq,
5991 (lpfc_cmd->pCmd != cmnd),
5992 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
5993
5994 spin_lock(&lpfc_cmd->buf_lock);
5995
5996 if (lpfc_cmd->pCmd == cmnd) {
5997 ret = FAILED;
5998 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5999 "0748 abort handler timed out waiting "
6000 "for aborting I/O (xri:x%x) to complete: "
6001 "ret %#x, ID %d, LUN %llu\n",
6002 iocb->sli4_xritag, ret,
6003 cmnd->device->id, cmnd->device->lun);
6004 }
6005
6006 lpfc_cmd->waitq = NULL;
6007
6008 spin_unlock(&lpfc_cmd->buf_lock);
6009 goto out;
6010
6011 out_unlock_ring:
6012 if (phba->sli_rev == LPFC_SLI_REV4)
6013 spin_unlock(&pring_s4->ring_lock);
6014 out_unlock_hba:
6015 spin_unlock(&phba->hbalock);
6016 spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
6017 out:
6018 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
6019 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
6020 "LUN %llu\n", ret, cmnd->device->id,
6021 cmnd->device->lun);
6022 return ret;
6023 }
6024
6025 static char *
lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)6026 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
6027 {
6028 switch (task_mgmt_cmd) {
6029 case FCP_ABORT_TASK_SET:
6030 return "ABORT_TASK_SET";
6031 case FCP_CLEAR_TASK_SET:
6032 return "FCP_CLEAR_TASK_SET";
6033 case FCP_BUS_RESET:
6034 return "FCP_BUS_RESET";
6035 case FCP_LUN_RESET:
6036 return "FCP_LUN_RESET";
6037 case FCP_TARGET_RESET:
6038 return "FCP_TARGET_RESET";
6039 case FCP_CLEAR_ACA:
6040 return "FCP_CLEAR_ACA";
6041 case FCP_TERMINATE_TASK:
6042 return "FCP_TERMINATE_TASK";
6043 default:
6044 return "unknown";
6045 }
6046 }
6047
6048
6049 /**
6050 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
6051 * @vport: The virtual port for which this call is being executed.
6052 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
6053 *
6054 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
6055 *
6056 * Return code :
6057 * 0x2003 - Error
6058 * 0x2002 - Success
6059 **/
6060 static int
lpfc_check_fcp_rsp(struct lpfc_vport * vport,struct lpfc_io_buf * lpfc_cmd)6061 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
6062 {
6063 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
6064 uint32_t rsp_info;
6065 uint32_t rsp_len;
6066 uint8_t rsp_info_code;
6067 int ret = FAILED;
6068
6069
6070 if (fcprsp == NULL)
6071 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6072 "0703 fcp_rsp is missing\n");
6073 else {
6074 rsp_info = fcprsp->rspStatus2;
6075 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
6076 rsp_info_code = fcprsp->rspInfo3;
6077
6078
6079 lpfc_printf_vlog(vport, KERN_INFO,
6080 LOG_FCP,
6081 "0706 fcp_rsp valid 0x%x,"
6082 " rsp len=%d code 0x%x\n",
6083 rsp_info,
6084 rsp_len, rsp_info_code);
6085
6086 /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN
6087 * field specifies the number of valid bytes of FCP_RSP_INFO.
6088 * The FCP_RSP_LEN field shall be set to 0x04 or 0x08
6089 */
6090 if ((fcprsp->rspStatus2 & RSP_LEN_VALID) &&
6091 ((rsp_len == 8) || (rsp_len == 4))) {
6092 switch (rsp_info_code) {
6093 case RSP_NO_FAILURE:
6094 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6095 "0715 Task Mgmt No Failure\n");
6096 ret = SUCCESS;
6097 break;
6098 case RSP_TM_NOT_SUPPORTED: /* TM rejected */
6099 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6100 "0716 Task Mgmt Target "
6101 "reject\n");
6102 break;
6103 case RSP_TM_NOT_COMPLETED: /* TM failed */
6104 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6105 "0717 Task Mgmt Target "
6106 "failed TM\n");
6107 break;
6108 case RSP_TM_INVALID_LU: /* TM to invalid LU! */
6109 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6110 "0718 Task Mgmt to invalid "
6111 "LUN\n");
6112 break;
6113 }
6114 }
6115 }
6116 return ret;
6117 }
6118
6119
6120 /**
6121 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
6122 * @vport: The virtual port for which this call is being executed.
6123 * @cmnd: Pointer to scsi_cmnd data structure.
6124 * @tgt_id: Target ID of remote device.
6125 * @lun_id: Lun number for the TMF
6126 * @task_mgmt_cmd: type of TMF to send
6127 *
6128 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
6129 * a remote port.
6130 *
6131 * Return Code:
6132 * 0x2003 - Error
6133 * 0x2002 - Success.
6134 **/
6135 static int
lpfc_send_taskmgmt(struct lpfc_vport * vport,struct scsi_cmnd * cmnd,unsigned int tgt_id,uint64_t lun_id,uint8_t task_mgmt_cmd)6136 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
6137 unsigned int tgt_id, uint64_t lun_id,
6138 uint8_t task_mgmt_cmd)
6139 {
6140 struct lpfc_hba *phba = vport->phba;
6141 struct lpfc_io_buf *lpfc_cmd;
6142 struct lpfc_iocbq *iocbq;
6143 struct lpfc_iocbq *iocbqrsp;
6144 struct lpfc_rport_data *rdata;
6145 struct lpfc_nodelist *pnode;
6146 int ret;
6147 int status;
6148
6149 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
6150 if (!rdata || !rdata->pnode)
6151 return FAILED;
6152 pnode = rdata->pnode;
6153
6154 lpfc_cmd = lpfc_get_scsi_buf(phba, pnode, NULL);
6155 if (lpfc_cmd == NULL)
6156 return FAILED;
6157 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
6158 lpfc_cmd->rdata = rdata;
6159 lpfc_cmd->pCmd = cmnd;
6160 lpfc_cmd->ndlp = pnode;
6161
6162 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
6163 task_mgmt_cmd);
6164 if (!status) {
6165 lpfc_release_scsi_buf(phba, lpfc_cmd);
6166 return FAILED;
6167 }
6168
6169 iocbq = &lpfc_cmd->cur_iocbq;
6170 iocbqrsp = lpfc_sli_get_iocbq(phba);
6171 if (iocbqrsp == NULL) {
6172 lpfc_release_scsi_buf(phba, lpfc_cmd);
6173 return FAILED;
6174 }
6175 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
6176
6177 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6178 "0702 Issue %s to TGT %d LUN %llu "
6179 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
6180 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
6181 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
6182 iocbq->iocb_flag);
6183
6184 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
6185 iocbq, iocbqrsp, lpfc_cmd->timeout);
6186 if ((status != IOCB_SUCCESS) ||
6187 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
6188 if (status != IOCB_SUCCESS ||
6189 iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
6190 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6191 "0727 TMF %s to TGT %d LUN %llu "
6192 "failed (%d, %d) iocb_flag x%x\n",
6193 lpfc_taskmgmt_name(task_mgmt_cmd),
6194 tgt_id, lun_id,
6195 iocbqrsp->iocb.ulpStatus,
6196 iocbqrsp->iocb.un.ulpWord[4],
6197 iocbq->iocb_flag);
6198 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
6199 if (status == IOCB_SUCCESS) {
6200 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
6201 /* Something in the FCP_RSP was invalid.
6202 * Check conditions */
6203 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
6204 else
6205 ret = FAILED;
6206 } else if (status == IOCB_TIMEDOUT) {
6207 ret = TIMEOUT_ERROR;
6208 } else {
6209 ret = FAILED;
6210 }
6211 } else
6212 ret = SUCCESS;
6213
6214 lpfc_sli_release_iocbq(phba, iocbqrsp);
6215
6216 if (ret != TIMEOUT_ERROR)
6217 lpfc_release_scsi_buf(phba, lpfc_cmd);
6218
6219 return ret;
6220 }
6221
6222 /**
6223 * lpfc_chk_tgt_mapped -
6224 * @vport: The virtual port to check on
6225 * @cmnd: Pointer to scsi_cmnd data structure.
6226 *
6227 * This routine delays until the scsi target (aka rport) for the
6228 * command exists (is present and logged in) or we declare it non-existent.
6229 *
6230 * Return code :
6231 * 0x2003 - Error
6232 * 0x2002 - Success
6233 **/
6234 static int
lpfc_chk_tgt_mapped(struct lpfc_vport * vport,struct scsi_cmnd * cmnd)6235 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
6236 {
6237 struct lpfc_rport_data *rdata;
6238 struct lpfc_nodelist *pnode;
6239 unsigned long later;
6240
6241 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
6242 if (!rdata) {
6243 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
6244 "0797 Tgt Map rport failure: rdata x%px\n", rdata);
6245 return FAILED;
6246 }
6247 pnode = rdata->pnode;
6248 /*
6249 * If target is not in a MAPPED state, delay until
6250 * target is rediscovered or devloss timeout expires.
6251 */
6252 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
6253 while (time_after(later, jiffies)) {
6254 if (!pnode)
6255 return FAILED;
6256 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
6257 return SUCCESS;
6258 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
6259 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
6260 if (!rdata)
6261 return FAILED;
6262 pnode = rdata->pnode;
6263 }
6264 if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
6265 return FAILED;
6266 return SUCCESS;
6267 }
6268
6269 /**
6270 * lpfc_reset_flush_io_context -
6271 * @vport: The virtual port (scsi_host) for the flush context
6272 * @tgt_id: If aborting by Target contect - specifies the target id
6273 * @lun_id: If aborting by Lun context - specifies the lun id
6274 * @context: specifies the context level to flush at.
6275 *
6276 * After a reset condition via TMF, we need to flush orphaned i/o
6277 * contexts from the adapter. This routine aborts any contexts
6278 * outstanding, then waits for their completions. The wait is
6279 * bounded by devloss_tmo though.
6280 *
6281 * Return code :
6282 * 0x2003 - Error
6283 * 0x2002 - Success
6284 **/
6285 static int
lpfc_reset_flush_io_context(struct lpfc_vport * vport,uint16_t tgt_id,uint64_t lun_id,lpfc_ctx_cmd context)6286 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
6287 uint64_t lun_id, lpfc_ctx_cmd context)
6288 {
6289 struct lpfc_hba *phba = vport->phba;
6290 unsigned long later;
6291 int cnt;
6292
6293 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
6294 if (cnt)
6295 lpfc_sli_abort_taskmgmt(vport,
6296 &phba->sli.sli3_ring[LPFC_FCP_RING],
6297 tgt_id, lun_id, context);
6298 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
6299 while (time_after(later, jiffies) && cnt) {
6300 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
6301 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
6302 }
6303 if (cnt) {
6304 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6305 "0724 I/O flush failure for context %s : cnt x%x\n",
6306 ((context == LPFC_CTX_LUN) ? "LUN" :
6307 ((context == LPFC_CTX_TGT) ? "TGT" :
6308 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
6309 cnt);
6310 return FAILED;
6311 }
6312 return SUCCESS;
6313 }
6314
6315 /**
6316 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
6317 * @cmnd: Pointer to scsi_cmnd data structure.
6318 *
6319 * This routine does a device reset by sending a LUN_RESET task management
6320 * command.
6321 *
6322 * Return code :
6323 * 0x2003 - Error
6324 * 0x2002 - Success
6325 **/
6326 static int
lpfc_device_reset_handler(struct scsi_cmnd * cmnd)6327 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
6328 {
6329 struct Scsi_Host *shost = cmnd->device->host;
6330 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
6331 struct lpfc_rport_data *rdata;
6332 struct lpfc_nodelist *pnode;
6333 unsigned tgt_id = cmnd->device->id;
6334 uint64_t lun_id = cmnd->device->lun;
6335 struct lpfc_scsi_event_header scsi_event;
6336 int status;
6337 u32 logit = LOG_FCP;
6338
6339 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
6340 if (!rdata || !rdata->pnode) {
6341 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6342 "0798 Device Reset rdata failure: rdata x%px\n",
6343 rdata);
6344 return FAILED;
6345 }
6346 pnode = rdata->pnode;
6347 status = fc_block_scsi_eh(cmnd);
6348 if (status != 0 && status != SUCCESS)
6349 return status;
6350
6351 status = lpfc_chk_tgt_mapped(vport, cmnd);
6352 if (status == FAILED) {
6353 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6354 "0721 Device Reset rport failure: rdata x%px\n", rdata);
6355 return FAILED;
6356 }
6357
6358 scsi_event.event_type = FC_REG_SCSI_EVENT;
6359 scsi_event.subcategory = LPFC_EVENT_LUNRESET;
6360 scsi_event.lun = lun_id;
6361 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
6362 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
6363
6364 fc_host_post_vendor_event(shost, fc_get_event_number(),
6365 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
6366
6367 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
6368 FCP_LUN_RESET);
6369 if (status != SUCCESS)
6370 logit = LOG_TRACE_EVENT;
6371
6372 lpfc_printf_vlog(vport, KERN_ERR, logit,
6373 "0713 SCSI layer issued Device Reset (%d, %llu) "
6374 "return x%x\n", tgt_id, lun_id, status);
6375
6376 /*
6377 * We have to clean up i/o as : they may be orphaned by the TMF;
6378 * or if the TMF failed, they may be in an indeterminate state.
6379 * So, continue on.
6380 * We will report success if all the i/o aborts successfully.
6381 */
6382 if (status == SUCCESS)
6383 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
6384 LPFC_CTX_LUN);
6385
6386 return status;
6387 }
6388
6389 /**
6390 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
6391 * @cmnd: Pointer to scsi_cmnd data structure.
6392 *
6393 * This routine does a target reset by sending a TARGET_RESET task management
6394 * command.
6395 *
6396 * Return code :
6397 * 0x2003 - Error
6398 * 0x2002 - Success
6399 **/
6400 static int
lpfc_target_reset_handler(struct scsi_cmnd * cmnd)6401 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
6402 {
6403 struct Scsi_Host *shost = cmnd->device->host;
6404 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
6405 struct lpfc_rport_data *rdata;
6406 struct lpfc_nodelist *pnode;
6407 unsigned tgt_id = cmnd->device->id;
6408 uint64_t lun_id = cmnd->device->lun;
6409 struct lpfc_scsi_event_header scsi_event;
6410 int status;
6411 u32 logit = LOG_FCP;
6412 u32 dev_loss_tmo = vport->cfg_devloss_tmo;
6413 unsigned long flags;
6414 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
6415
6416 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
6417 if (!rdata || !rdata->pnode) {
6418 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6419 "0799 Target Reset rdata failure: rdata x%px\n",
6420 rdata);
6421 return FAILED;
6422 }
6423 pnode = rdata->pnode;
6424 status = fc_block_scsi_eh(cmnd);
6425 if (status != 0 && status != SUCCESS)
6426 return status;
6427
6428 status = lpfc_chk_tgt_mapped(vport, cmnd);
6429 if (status == FAILED) {
6430 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6431 "0722 Target Reset rport failure: rdata x%px\n", rdata);
6432 if (pnode) {
6433 spin_lock_irqsave(&pnode->lock, flags);
6434 pnode->nlp_flag &= ~NLP_NPR_ADISC;
6435 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
6436 spin_unlock_irqrestore(&pnode->lock, flags);
6437 }
6438 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
6439 LPFC_CTX_TGT);
6440 return FAST_IO_FAIL;
6441 }
6442
6443 scsi_event.event_type = FC_REG_SCSI_EVENT;
6444 scsi_event.subcategory = LPFC_EVENT_TGTRESET;
6445 scsi_event.lun = 0;
6446 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
6447 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
6448
6449 fc_host_post_vendor_event(shost, fc_get_event_number(),
6450 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
6451
6452 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
6453 FCP_TARGET_RESET);
6454 if (status != SUCCESS) {
6455 logit = LOG_TRACE_EVENT;
6456
6457 /* Issue LOGO, if no LOGO is outstanding */
6458 spin_lock_irqsave(&pnode->lock, flags);
6459 if (!(pnode->save_flags & NLP_WAIT_FOR_LOGO) &&
6460 !pnode->logo_waitq) {
6461 pnode->logo_waitq = &waitq;
6462 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
6463 pnode->nlp_flag |= NLP_ISSUE_LOGO;
6464 pnode->save_flags |= NLP_WAIT_FOR_LOGO;
6465 spin_unlock_irqrestore(&pnode->lock, flags);
6466 lpfc_unreg_rpi(vport, pnode);
6467 wait_event_timeout(waitq,
6468 (!(pnode->save_flags &
6469 NLP_WAIT_FOR_LOGO)),
6470 msecs_to_jiffies(dev_loss_tmo *
6471 1000));
6472
6473 if (pnode->save_flags & NLP_WAIT_FOR_LOGO) {
6474 lpfc_printf_vlog(vport, KERN_ERR, logit,
6475 "0725 SCSI layer TGTRST "
6476 "failed & LOGO TMO (%d, %llu) "
6477 "return x%x\n",
6478 tgt_id, lun_id, status);
6479 spin_lock_irqsave(&pnode->lock, flags);
6480 pnode->save_flags &= ~NLP_WAIT_FOR_LOGO;
6481 } else {
6482 spin_lock_irqsave(&pnode->lock, flags);
6483 }
6484 pnode->logo_waitq = NULL;
6485 spin_unlock_irqrestore(&pnode->lock, flags);
6486 status = SUCCESS;
6487
6488 } else {
6489 spin_unlock_irqrestore(&pnode->lock, flags);
6490 status = FAILED;
6491 }
6492 }
6493
6494 lpfc_printf_vlog(vport, KERN_ERR, logit,
6495 "0723 SCSI layer issued Target Reset (%d, %llu) "
6496 "return x%x\n", tgt_id, lun_id, status);
6497
6498 /*
6499 * We have to clean up i/o as : they may be orphaned by the TMF;
6500 * or if the TMF failed, they may be in an indeterminate state.
6501 * So, continue on.
6502 * We will report success if all the i/o aborts successfully.
6503 */
6504 if (status == SUCCESS)
6505 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
6506 LPFC_CTX_TGT);
6507 return status;
6508 }
6509
6510 /**
6511 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
6512 * @cmnd: Pointer to scsi_cmnd data structure.
6513 *
6514 * This routine does target reset to all targets on @cmnd->device->host.
6515 * This emulates Parallel SCSI Bus Reset Semantics.
6516 *
6517 * Return code :
6518 * 0x2003 - Error
6519 * 0x2002 - Success
6520 **/
6521 static int
lpfc_bus_reset_handler(struct scsi_cmnd * cmnd)6522 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
6523 {
6524 struct Scsi_Host *shost = cmnd->device->host;
6525 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
6526 struct lpfc_nodelist *ndlp = NULL;
6527 struct lpfc_scsi_event_header scsi_event;
6528 int match;
6529 int ret = SUCCESS, status, i;
6530 u32 logit = LOG_FCP;
6531
6532 scsi_event.event_type = FC_REG_SCSI_EVENT;
6533 scsi_event.subcategory = LPFC_EVENT_BUSRESET;
6534 scsi_event.lun = 0;
6535 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
6536 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
6537
6538 fc_host_post_vendor_event(shost, fc_get_event_number(),
6539 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
6540
6541 status = fc_block_scsi_eh(cmnd);
6542 if (status != 0 && status != SUCCESS)
6543 return status;
6544
6545 /*
6546 * Since the driver manages a single bus device, reset all
6547 * targets known to the driver. Should any target reset
6548 * fail, this routine returns failure to the midlayer.
6549 */
6550 for (i = 0; i < LPFC_MAX_TARGET; i++) {
6551 /* Search for mapped node by target ID */
6552 match = 0;
6553 spin_lock_irq(shost->host_lock);
6554 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
6555
6556 if (vport->phba->cfg_fcp2_no_tgt_reset &&
6557 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
6558 continue;
6559 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
6560 ndlp->nlp_sid == i &&
6561 ndlp->rport &&
6562 ndlp->nlp_type & NLP_FCP_TARGET) {
6563 match = 1;
6564 break;
6565 }
6566 }
6567 spin_unlock_irq(shost->host_lock);
6568 if (!match)
6569 continue;
6570
6571 status = lpfc_send_taskmgmt(vport, cmnd,
6572 i, 0, FCP_TARGET_RESET);
6573
6574 if (status != SUCCESS) {
6575 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6576 "0700 Bus Reset on target %d failed\n",
6577 i);
6578 ret = FAILED;
6579 }
6580 }
6581 /*
6582 * We have to clean up i/o as : they may be orphaned by the TMFs
6583 * above; or if any of the TMFs failed, they may be in an
6584 * indeterminate state.
6585 * We will report success if all the i/o aborts successfully.
6586 */
6587
6588 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
6589 if (status != SUCCESS)
6590 ret = FAILED;
6591 if (ret == FAILED)
6592 logit = LOG_TRACE_EVENT;
6593
6594 lpfc_printf_vlog(vport, KERN_ERR, logit,
6595 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
6596 return ret;
6597 }
6598
6599 /**
6600 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
6601 * @cmnd: Pointer to scsi_cmnd data structure.
6602 *
6603 * This routine does host reset to the adaptor port. It brings the HBA
6604 * offline, performs a board restart, and then brings the board back online.
6605 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
6606 * reject all outstanding SCSI commands to the host and error returned
6607 * back to SCSI mid-level. As this will be SCSI mid-level's last resort
6608 * of error handling, it will only return error if resetting of the adapter
6609 * is not successful; in all other cases, will return success.
6610 *
6611 * Return code :
6612 * 0x2003 - Error
6613 * 0x2002 - Success
6614 **/
6615 static int
lpfc_host_reset_handler(struct scsi_cmnd * cmnd)6616 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
6617 {
6618 struct Scsi_Host *shost = cmnd->device->host;
6619 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
6620 struct lpfc_hba *phba = vport->phba;
6621 int rc, ret = SUCCESS;
6622
6623 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
6624 "3172 SCSI layer issued Host Reset Data:\n");
6625
6626 lpfc_offline_prep(phba, LPFC_MBX_WAIT);
6627 lpfc_offline(phba);
6628 rc = lpfc_sli_brdrestart(phba);
6629 if (rc)
6630 goto error;
6631
6632 /* Wait for successful restart of adapter */
6633 if (phba->sli_rev < LPFC_SLI_REV4) {
6634 rc = lpfc_sli_chipset_init(phba);
6635 if (rc)
6636 goto error;
6637 }
6638
6639 rc = lpfc_online(phba);
6640 if (rc)
6641 goto error;
6642
6643 lpfc_unblock_mgmt_io(phba);
6644
6645 return ret;
6646 error:
6647 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6648 "3323 Failed host reset\n");
6649 lpfc_unblock_mgmt_io(phba);
6650 return FAILED;
6651 }
6652
6653 /**
6654 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
6655 * @sdev: Pointer to scsi_device.
6656 *
6657 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
6658 * globally available list of scsi buffers. This routine also makes sure scsi
6659 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
6660 * of scsi buffer exists for the lifetime of the driver.
6661 *
6662 * Return codes:
6663 * non-0 - Error
6664 * 0 - Success
6665 **/
6666 static int
lpfc_slave_alloc(struct scsi_device * sdev)6667 lpfc_slave_alloc(struct scsi_device *sdev)
6668 {
6669 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
6670 struct lpfc_hba *phba = vport->phba;
6671 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
6672 uint32_t total = 0;
6673 uint32_t num_to_alloc = 0;
6674 int num_allocated = 0;
6675 uint32_t sdev_cnt;
6676 struct lpfc_device_data *device_data;
6677 unsigned long flags;
6678 struct lpfc_name target_wwpn;
6679
6680 if (!rport || fc_remote_port_chkready(rport))
6681 return -ENXIO;
6682
6683 if (phba->cfg_fof) {
6684
6685 /*
6686 * Check to see if the device data structure for the lun
6687 * exists. If not, create one.
6688 */
6689
6690 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
6691 spin_lock_irqsave(&phba->devicelock, flags);
6692 device_data = __lpfc_get_device_data(phba,
6693 &phba->luns,
6694 &vport->fc_portname,
6695 &target_wwpn,
6696 sdev->lun);
6697 if (!device_data) {
6698 spin_unlock_irqrestore(&phba->devicelock, flags);
6699 device_data = lpfc_create_device_data(phba,
6700 &vport->fc_portname,
6701 &target_wwpn,
6702 sdev->lun,
6703 phba->cfg_XLanePriority,
6704 true);
6705 if (!device_data)
6706 return -ENOMEM;
6707 spin_lock_irqsave(&phba->devicelock, flags);
6708 list_add_tail(&device_data->listentry, &phba->luns);
6709 }
6710 device_data->rport_data = rport->dd_data;
6711 device_data->available = true;
6712 spin_unlock_irqrestore(&phba->devicelock, flags);
6713 sdev->hostdata = device_data;
6714 } else {
6715 sdev->hostdata = rport->dd_data;
6716 }
6717 sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
6718
6719 /* For SLI4, all IO buffers are pre-allocated */
6720 if (phba->sli_rev == LPFC_SLI_REV4)
6721 return 0;
6722
6723 /* This code path is now ONLY for SLI3 adapters */
6724
6725 /*
6726 * Populate the cmds_per_lun count scsi_bufs into this host's globally
6727 * available list of scsi buffers. Don't allocate more than the
6728 * HBA limit conveyed to the midlayer via the host structure. The
6729 * formula accounts for the lun_queue_depth + error handlers + 1
6730 * extra. This list of scsi bufs exists for the lifetime of the driver.
6731 */
6732 total = phba->total_scsi_bufs;
6733 num_to_alloc = vport->cfg_lun_queue_depth + 2;
6734
6735 /* If allocated buffers are enough do nothing */
6736 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
6737 return 0;
6738
6739 /* Allow some exchanges to be available always to complete discovery */
6740 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
6741 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
6742 "0704 At limitation of %d preallocated "
6743 "command buffers\n", total);
6744 return 0;
6745 /* Allow some exchanges to be available always to complete discovery */
6746 } else if (total + num_to_alloc >
6747 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
6748 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
6749 "0705 Allocation request of %d "
6750 "command buffers will exceed max of %d. "
6751 "Reducing allocation request to %d.\n",
6752 num_to_alloc, phba->cfg_hba_queue_depth,
6753 (phba->cfg_hba_queue_depth - total));
6754 num_to_alloc = phba->cfg_hba_queue_depth - total;
6755 }
6756 num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc);
6757 if (num_to_alloc != num_allocated) {
6758 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6759 "0708 Allocation request of %d "
6760 "command buffers did not succeed. "
6761 "Allocated %d buffers.\n",
6762 num_to_alloc, num_allocated);
6763 }
6764 if (num_allocated > 0)
6765 phba->total_scsi_bufs += num_allocated;
6766 return 0;
6767 }
6768
6769 /**
6770 * lpfc_slave_configure - scsi_host_template slave_configure entry point
6771 * @sdev: Pointer to scsi_device.
6772 *
6773 * This routine configures following items
6774 * - Tag command queuing support for @sdev if supported.
6775 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
6776 *
6777 * Return codes:
6778 * 0 - Success
6779 **/
6780 static int
lpfc_slave_configure(struct scsi_device * sdev)6781 lpfc_slave_configure(struct scsi_device *sdev)
6782 {
6783 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
6784 struct lpfc_hba *phba = vport->phba;
6785
6786 scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
6787
6788 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
6789 lpfc_sli_handle_fast_ring_event(phba,
6790 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
6791 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
6792 lpfc_poll_rearm_timer(phba);
6793 }
6794
6795 return 0;
6796 }
6797
6798 /**
6799 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
6800 * @sdev: Pointer to scsi_device.
6801 *
6802 * This routine sets @sdev hostatdata filed to null.
6803 **/
6804 static void
lpfc_slave_destroy(struct scsi_device * sdev)6805 lpfc_slave_destroy(struct scsi_device *sdev)
6806 {
6807 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
6808 struct lpfc_hba *phba = vport->phba;
6809 unsigned long flags;
6810 struct lpfc_device_data *device_data = sdev->hostdata;
6811
6812 atomic_dec(&phba->sdev_cnt);
6813 if ((phba->cfg_fof) && (device_data)) {
6814 spin_lock_irqsave(&phba->devicelock, flags);
6815 device_data->available = false;
6816 if (!device_data->oas_enabled)
6817 lpfc_delete_device_data(phba, device_data);
6818 spin_unlock_irqrestore(&phba->devicelock, flags);
6819 }
6820 sdev->hostdata = NULL;
6821 return;
6822 }
6823
6824 /**
6825 * lpfc_create_device_data - creates and initializes device data structure for OAS
6826 * @phba: Pointer to host bus adapter structure.
6827 * @vport_wwpn: Pointer to vport's wwpn information
6828 * @target_wwpn: Pointer to target's wwpn information
6829 * @lun: Lun on target
6830 * @pri: Priority
6831 * @atomic_create: Flag to indicate if memory should be allocated using the
6832 * GFP_ATOMIC flag or not.
6833 *
6834 * This routine creates a device data structure which will contain identifying
6835 * information for the device (host wwpn, target wwpn, lun), state of OAS,
6836 * whether or not the corresponding lun is available by the system,
6837 * and pointer to the rport data.
6838 *
6839 * Return codes:
6840 * NULL - Error
6841 * Pointer to lpfc_device_data - Success
6842 **/
6843 struct lpfc_device_data*
lpfc_create_device_data(struct lpfc_hba * phba,struct lpfc_name * vport_wwpn,struct lpfc_name * target_wwpn,uint64_t lun,uint32_t pri,bool atomic_create)6844 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
6845 struct lpfc_name *target_wwpn, uint64_t lun,
6846 uint32_t pri, bool atomic_create)
6847 {
6848
6849 struct lpfc_device_data *lun_info;
6850 int memory_flags;
6851
6852 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
6853 !(phba->cfg_fof))
6854 return NULL;
6855
6856 /* Attempt to create the device data to contain lun info */
6857
6858 if (atomic_create)
6859 memory_flags = GFP_ATOMIC;
6860 else
6861 memory_flags = GFP_KERNEL;
6862 lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
6863 if (!lun_info)
6864 return NULL;
6865 INIT_LIST_HEAD(&lun_info->listentry);
6866 lun_info->rport_data = NULL;
6867 memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
6868 sizeof(struct lpfc_name));
6869 memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
6870 sizeof(struct lpfc_name));
6871 lun_info->device_id.lun = lun;
6872 lun_info->oas_enabled = false;
6873 lun_info->priority = pri;
6874 lun_info->available = false;
6875 return lun_info;
6876 }
6877
6878 /**
6879 * lpfc_delete_device_data - frees a device data structure for OAS
6880 * @phba: Pointer to host bus adapter structure.
6881 * @lun_info: Pointer to device data structure to free.
6882 *
6883 * This routine frees the previously allocated device data structure passed.
6884 *
6885 **/
6886 void
lpfc_delete_device_data(struct lpfc_hba * phba,struct lpfc_device_data * lun_info)6887 lpfc_delete_device_data(struct lpfc_hba *phba,
6888 struct lpfc_device_data *lun_info)
6889 {
6890
6891 if (unlikely(!phba) || !lun_info ||
6892 !(phba->cfg_fof))
6893 return;
6894
6895 if (!list_empty(&lun_info->listentry))
6896 list_del(&lun_info->listentry);
6897 mempool_free(lun_info, phba->device_data_mem_pool);
6898 return;
6899 }
6900
6901 /**
6902 * __lpfc_get_device_data - returns the device data for the specified lun
6903 * @phba: Pointer to host bus adapter structure.
6904 * @list: Point to list to search.
6905 * @vport_wwpn: Pointer to vport's wwpn information
6906 * @target_wwpn: Pointer to target's wwpn information
6907 * @lun: Lun on target
6908 *
6909 * This routine searches the list passed for the specified lun's device data.
6910 * This function does not hold locks, it is the responsibility of the caller
6911 * to ensure the proper lock is held before calling the function.
6912 *
6913 * Return codes:
6914 * NULL - Error
6915 * Pointer to lpfc_device_data - Success
6916 **/
6917 struct lpfc_device_data*
__lpfc_get_device_data(struct lpfc_hba * phba,struct list_head * list,struct lpfc_name * vport_wwpn,struct lpfc_name * target_wwpn,uint64_t lun)6918 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
6919 struct lpfc_name *vport_wwpn,
6920 struct lpfc_name *target_wwpn, uint64_t lun)
6921 {
6922
6923 struct lpfc_device_data *lun_info;
6924
6925 if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
6926 !phba->cfg_fof)
6927 return NULL;
6928
6929 /* Check to see if the lun is already enabled for OAS. */
6930
6931 list_for_each_entry(lun_info, list, listentry) {
6932 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
6933 sizeof(struct lpfc_name)) == 0) &&
6934 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
6935 sizeof(struct lpfc_name)) == 0) &&
6936 (lun_info->device_id.lun == lun))
6937 return lun_info;
6938 }
6939
6940 return NULL;
6941 }
6942
6943 /**
6944 * lpfc_find_next_oas_lun - searches for the next oas lun
6945 * @phba: Pointer to host bus adapter structure.
6946 * @vport_wwpn: Pointer to vport's wwpn information
6947 * @target_wwpn: Pointer to target's wwpn information
6948 * @starting_lun: Pointer to the lun to start searching for
6949 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
6950 * @found_target_wwpn: Pointer to the found lun's target wwpn information
6951 * @found_lun: Pointer to the found lun.
6952 * @found_lun_status: Pointer to status of the found lun.
6953 * @found_lun_pri: Pointer to priority of the found lun.
6954 *
6955 * This routine searches the luns list for the specified lun
6956 * or the first lun for the vport/target. If the vport wwpn contains
6957 * a zero value then a specific vport is not specified. In this case
6958 * any vport which contains the lun will be considered a match. If the
6959 * target wwpn contains a zero value then a specific target is not specified.
6960 * In this case any target which contains the lun will be considered a
6961 * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status
6962 * are returned. The function will also return the next lun if available.
6963 * If the next lun is not found, starting_lun parameter will be set to
6964 * NO_MORE_OAS_LUN.
6965 *
6966 * Return codes:
6967 * non-0 - Error
6968 * 0 - Success
6969 **/
6970 bool
lpfc_find_next_oas_lun(struct lpfc_hba * phba,struct lpfc_name * vport_wwpn,struct lpfc_name * target_wwpn,uint64_t * starting_lun,struct lpfc_name * found_vport_wwpn,struct lpfc_name * found_target_wwpn,uint64_t * found_lun,uint32_t * found_lun_status,uint32_t * found_lun_pri)6971 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
6972 struct lpfc_name *target_wwpn, uint64_t *starting_lun,
6973 struct lpfc_name *found_vport_wwpn,
6974 struct lpfc_name *found_target_wwpn,
6975 uint64_t *found_lun,
6976 uint32_t *found_lun_status,
6977 uint32_t *found_lun_pri)
6978 {
6979
6980 unsigned long flags;
6981 struct lpfc_device_data *lun_info;
6982 struct lpfc_device_id *device_id;
6983 uint64_t lun;
6984 bool found = false;
6985
6986 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
6987 !starting_lun || !found_vport_wwpn ||
6988 !found_target_wwpn || !found_lun || !found_lun_status ||
6989 (*starting_lun == NO_MORE_OAS_LUN) ||
6990 !phba->cfg_fof)
6991 return false;
6992
6993 lun = *starting_lun;
6994 *found_lun = NO_MORE_OAS_LUN;
6995 *starting_lun = NO_MORE_OAS_LUN;
6996
6997 /* Search for lun or the lun closet in value */
6998
6999 spin_lock_irqsave(&phba->devicelock, flags);
7000 list_for_each_entry(lun_info, &phba->luns, listentry) {
7001 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
7002 (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
7003 sizeof(struct lpfc_name)) == 0)) &&
7004 ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
7005 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
7006 sizeof(struct lpfc_name)) == 0)) &&
7007 (lun_info->oas_enabled)) {
7008 device_id = &lun_info->device_id;
7009 if ((!found) &&
7010 ((lun == FIND_FIRST_OAS_LUN) ||
7011 (device_id->lun == lun))) {
7012 *found_lun = device_id->lun;
7013 memcpy(found_vport_wwpn,
7014 &device_id->vport_wwpn,
7015 sizeof(struct lpfc_name));
7016 memcpy(found_target_wwpn,
7017 &device_id->target_wwpn,
7018 sizeof(struct lpfc_name));
7019 if (lun_info->available)
7020 *found_lun_status =
7021 OAS_LUN_STATUS_EXISTS;
7022 else
7023 *found_lun_status = 0;
7024 *found_lun_pri = lun_info->priority;
7025 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
7026 memset(vport_wwpn, 0x0,
7027 sizeof(struct lpfc_name));
7028 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
7029 memset(target_wwpn, 0x0,
7030 sizeof(struct lpfc_name));
7031 found = true;
7032 } else if (found) {
7033 *starting_lun = device_id->lun;
7034 memcpy(vport_wwpn, &device_id->vport_wwpn,
7035 sizeof(struct lpfc_name));
7036 memcpy(target_wwpn, &device_id->target_wwpn,
7037 sizeof(struct lpfc_name));
7038 break;
7039 }
7040 }
7041 }
7042 spin_unlock_irqrestore(&phba->devicelock, flags);
7043 return found;
7044 }
7045
7046 /**
7047 * lpfc_enable_oas_lun - enables a lun for OAS operations
7048 * @phba: Pointer to host bus adapter structure.
7049 * @vport_wwpn: Pointer to vport's wwpn information
7050 * @target_wwpn: Pointer to target's wwpn information
7051 * @lun: Lun
7052 * @pri: Priority
7053 *
7054 * This routine enables a lun for oas operations. The routines does so by
7055 * doing the following :
7056 *
7057 * 1) Checks to see if the device data for the lun has been created.
7058 * 2) If found, sets the OAS enabled flag if not set and returns.
7059 * 3) Otherwise, creates a device data structure.
7060 * 4) If successfully created, indicates the device data is for an OAS lun,
7061 * indicates the lun is not available and add to the list of luns.
7062 *
7063 * Return codes:
7064 * false - Error
7065 * true - Success
7066 **/
7067 bool
lpfc_enable_oas_lun(struct lpfc_hba * phba,struct lpfc_name * vport_wwpn,struct lpfc_name * target_wwpn,uint64_t lun,uint8_t pri)7068 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
7069 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
7070 {
7071
7072 struct lpfc_device_data *lun_info;
7073 unsigned long flags;
7074
7075 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
7076 !phba->cfg_fof)
7077 return false;
7078
7079 spin_lock_irqsave(&phba->devicelock, flags);
7080
7081 /* Check to see if the device data for the lun has been created */
7082 lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
7083 target_wwpn, lun);
7084 if (lun_info) {
7085 if (!lun_info->oas_enabled)
7086 lun_info->oas_enabled = true;
7087 lun_info->priority = pri;
7088 spin_unlock_irqrestore(&phba->devicelock, flags);
7089 return true;
7090 }
7091
7092 /* Create an lun info structure and add to list of luns */
7093 lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
7094 pri, true);
7095 if (lun_info) {
7096 lun_info->oas_enabled = true;
7097 lun_info->priority = pri;
7098 lun_info->available = false;
7099 list_add_tail(&lun_info->listentry, &phba->luns);
7100 spin_unlock_irqrestore(&phba->devicelock, flags);
7101 return true;
7102 }
7103 spin_unlock_irqrestore(&phba->devicelock, flags);
7104 return false;
7105 }
7106
7107 /**
7108 * lpfc_disable_oas_lun - disables a lun for OAS operations
7109 * @phba: Pointer to host bus adapter structure.
7110 * @vport_wwpn: Pointer to vport's wwpn information
7111 * @target_wwpn: Pointer to target's wwpn information
7112 * @lun: Lun
7113 * @pri: Priority
7114 *
7115 * This routine disables a lun for oas operations. The routines does so by
7116 * doing the following :
7117 *
7118 * 1) Checks to see if the device data for the lun is created.
7119 * 2) If present, clears the flag indicating this lun is for OAS.
7120 * 3) If the lun is not available by the system, the device data is
7121 * freed.
7122 *
7123 * Return codes:
7124 * false - Error
7125 * true - Success
7126 **/
7127 bool
lpfc_disable_oas_lun(struct lpfc_hba * phba,struct lpfc_name * vport_wwpn,struct lpfc_name * target_wwpn,uint64_t lun,uint8_t pri)7128 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
7129 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
7130 {
7131
7132 struct lpfc_device_data *lun_info;
7133 unsigned long flags;
7134
7135 if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
7136 !phba->cfg_fof)
7137 return false;
7138
7139 spin_lock_irqsave(&phba->devicelock, flags);
7140
7141 /* Check to see if the lun is available. */
7142 lun_info = __lpfc_get_device_data(phba,
7143 &phba->luns, vport_wwpn,
7144 target_wwpn, lun);
7145 if (lun_info) {
7146 lun_info->oas_enabled = false;
7147 lun_info->priority = pri;
7148 if (!lun_info->available)
7149 lpfc_delete_device_data(phba, lun_info);
7150 spin_unlock_irqrestore(&phba->devicelock, flags);
7151 return true;
7152 }
7153
7154 spin_unlock_irqrestore(&phba->devicelock, flags);
7155 return false;
7156 }
7157
7158 static int
lpfc_no_command(struct Scsi_Host * shost,struct scsi_cmnd * cmnd)7159 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
7160 {
7161 return SCSI_MLQUEUE_HOST_BUSY;
7162 }
7163
7164 static int
lpfc_no_handler(struct scsi_cmnd * cmnd)7165 lpfc_no_handler(struct scsi_cmnd *cmnd)
7166 {
7167 return FAILED;
7168 }
7169
7170 static int
lpfc_no_slave(struct scsi_device * sdev)7171 lpfc_no_slave(struct scsi_device *sdev)
7172 {
7173 return -ENODEV;
7174 }
7175
7176 struct scsi_host_template lpfc_template_nvme = {
7177 .module = THIS_MODULE,
7178 .name = LPFC_DRIVER_NAME,
7179 .proc_name = LPFC_DRIVER_NAME,
7180 .info = lpfc_info,
7181 .queuecommand = lpfc_no_command,
7182 .eh_abort_handler = lpfc_no_handler,
7183 .eh_device_reset_handler = lpfc_no_handler,
7184 .eh_target_reset_handler = lpfc_no_handler,
7185 .eh_bus_reset_handler = lpfc_no_handler,
7186 .eh_host_reset_handler = lpfc_no_handler,
7187 .slave_alloc = lpfc_no_slave,
7188 .slave_configure = lpfc_no_slave,
7189 .scan_finished = lpfc_scan_finished,
7190 .this_id = -1,
7191 .sg_tablesize = 1,
7192 .cmd_per_lun = 1,
7193 .shost_attrs = lpfc_hba_attrs,
7194 .max_sectors = 0xFFFFFFFF,
7195 .vendor_id = LPFC_NL_VENDOR_ID,
7196 .track_queue_depth = 0,
7197 };
7198
7199 struct scsi_host_template lpfc_template = {
7200 .module = THIS_MODULE,
7201 .name = LPFC_DRIVER_NAME,
7202 .proc_name = LPFC_DRIVER_NAME,
7203 .info = lpfc_info,
7204 .queuecommand = lpfc_queuecommand,
7205 .eh_timed_out = fc_eh_timed_out,
7206 .eh_should_retry_cmd = fc_eh_should_retry_cmd,
7207 .eh_abort_handler = lpfc_abort_handler,
7208 .eh_device_reset_handler = lpfc_device_reset_handler,
7209 .eh_target_reset_handler = lpfc_target_reset_handler,
7210 .eh_bus_reset_handler = lpfc_bus_reset_handler,
7211 .eh_host_reset_handler = lpfc_host_reset_handler,
7212 .slave_alloc = lpfc_slave_alloc,
7213 .slave_configure = lpfc_slave_configure,
7214 .slave_destroy = lpfc_slave_destroy,
7215 .scan_finished = lpfc_scan_finished,
7216 .this_id = -1,
7217 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
7218 .cmd_per_lun = LPFC_CMD_PER_LUN,
7219 .shost_attrs = lpfc_hba_attrs,
7220 .max_sectors = 0xFFFFFFFF,
7221 .vendor_id = LPFC_NL_VENDOR_ID,
7222 .change_queue_depth = scsi_change_queue_depth,
7223 .track_queue_depth = 1,
7224 };
7225