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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / scsi / lpfc / lpfc_scsi.c
blobc0755565fae9da39f9173fbfcd5d92e85db5229e
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2007 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
8 * *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of version 2 of the GNU General *
11 * Public License as published by the Free Software Foundation. *
12 * This program is distributed in the hope that it will be useful. *
13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17 * TO BE LEGALLY INVALID. See the GNU General Public License for *
18 * more details, a copy of which can be found in the file COPYING *
19 * included with this package. *
20 *******************************************************************/
21
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_tcq.h>
30 #include <scsi/scsi_transport_fc.h>
31
32 #include "lpfc_version.h"
33 #include "lpfc_hw.h"
34 #include "lpfc_sli.h"
35 #include "lpfc_disc.h"
36 #include "lpfc_scsi.h"
37 #include "lpfc.h"
38 #include "lpfc_logmsg.h"
39 #include "lpfc_crtn.h"
40 #include "lpfc_vport.h"
41
42 #define LPFC_RESET_WAIT 2
43 #define LPFC_ABORT_WAIT 2
44
45 /*
46 * This function is called with no lock held when there is a resource
47 * error in driver or in firmware.
48 */
49 void
50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
51 {
52 unsigned long flags;
53
54 spin_lock_irqsave(&phba->hbalock, flags);
55 atomic_inc(&phba->num_rsrc_err);
56 phba->last_rsrc_error_time = jiffies;
57
58 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
59 spin_unlock_irqrestore(&phba->hbalock, flags);
60 return;
61 }
62
63 phba->last_ramp_down_time = jiffies;
64
65 spin_unlock_irqrestore(&phba->hbalock, flags);
66
67 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
68 if ((phba->pport->work_port_events &
69 WORKER_RAMP_DOWN_QUEUE) == 0) {
70 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
71 }
72 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
73
74 spin_lock_irqsave(&phba->hbalock, flags);
75 if (phba->work_wait)
76 wake_up(phba->work_wait);
77 spin_unlock_irqrestore(&phba->hbalock, flags);
78
79 return;
80 }
81
82 /*
83 * This function is called with no lock held when there is a successful
84 * SCSI command completion.
85 */
86 static inline void
87 lpfc_rampup_queue_depth(struct lpfc_vport *vport,
88 struct scsi_device *sdev)
89 {
90 unsigned long flags;
91 struct lpfc_hba *phba = vport->phba;
92 atomic_inc(&phba->num_cmd_success);
93
94 if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
95 return;
96 spin_lock_irqsave(&phba->hbalock, flags);
97 if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
98 ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
99 spin_unlock_irqrestore(&phba->hbalock, flags);
100 return;
101 }
102 phba->last_ramp_up_time = jiffies;
103 spin_unlock_irqrestore(&phba->hbalock, flags);
104
105 spin_lock_irqsave(&phba->pport->work_port_lock, flags);
106 if ((phba->pport->work_port_events &
107 WORKER_RAMP_UP_QUEUE) == 0) {
108 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
109 }
110 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
111
112 spin_lock_irqsave(&phba->hbalock, flags);
113 if (phba->work_wait)
114 wake_up(phba->work_wait);
115 spin_unlock_irqrestore(&phba->hbalock, flags);
116 }
117
118 void
119 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
120 {
121 struct lpfc_vport **vports;
122 struct Scsi_Host *shost;
123 struct scsi_device *sdev;
124 unsigned long new_queue_depth;
125 unsigned long num_rsrc_err, num_cmd_success;
126 int i;
127
128 num_rsrc_err = atomic_read(&phba->num_rsrc_err);
129 num_cmd_success = atomic_read(&phba->num_cmd_success);
130
131 vports = lpfc_create_vport_work_array(phba);
132 if (vports != NULL)
133 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
134 shost = lpfc_shost_from_vport(vports[i]);
135 shost_for_each_device(sdev, shost) {
136 new_queue_depth =
137 sdev->queue_depth * num_rsrc_err /
138 (num_rsrc_err + num_cmd_success);
139 if (!new_queue_depth)
140 new_queue_depth = sdev->queue_depth - 1;
141 else
142 new_queue_depth = sdev->queue_depth -
143 new_queue_depth;
144 if (sdev->ordered_tags)
145 scsi_adjust_queue_depth(sdev,
146 MSG_ORDERED_TAG,
147 new_queue_depth);
148 else
149 scsi_adjust_queue_depth(sdev,
150 MSG_SIMPLE_TAG,
151 new_queue_depth);
152 }
153 }
154 lpfc_destroy_vport_work_array(vports);
155 atomic_set(&phba->num_rsrc_err, 0);
156 atomic_set(&phba->num_cmd_success, 0);
157 }
158
159 void
160 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
161 {
162 struct lpfc_vport **vports;
163 struct Scsi_Host *shost;
164 struct scsi_device *sdev;
165 int i;
166
167 vports = lpfc_create_vport_work_array(phba);
168 if (vports != NULL)
169 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
170 shost = lpfc_shost_from_vport(vports[i]);
171 shost_for_each_device(sdev, shost) {
172 if (sdev->ordered_tags)
173 scsi_adjust_queue_depth(sdev,
174 MSG_ORDERED_TAG,
175 sdev->queue_depth+1);
176 else
177 scsi_adjust_queue_depth(sdev,
178 MSG_SIMPLE_TAG,
179 sdev->queue_depth+1);
180 }
181 }
182 lpfc_destroy_vport_work_array(vports);
183 atomic_set(&phba->num_rsrc_err, 0);
184 atomic_set(&phba->num_cmd_success, 0);
185 }
186
187 /*
188 * This routine allocates a scsi buffer, which contains all the necessary
189 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
190 * contains information to build the IOCB. The DMAable region contains
191 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
192 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
193 * and the BPL BDE is setup in the IOCB.
194 */
195 static struct lpfc_scsi_buf *
196 lpfc_new_scsi_buf(struct lpfc_vport *vport)
197 {
198 struct lpfc_hba *phba = vport->phba;
199 struct lpfc_scsi_buf *psb;
200 struct ulp_bde64 *bpl;
201 IOCB_t *iocb;
202 dma_addr_t pdma_phys;
203 uint16_t iotag;
204
205 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
206 if (!psb)
207 return NULL;
208
209 /*
210 * Get memory from the pci pool to map the virt space to pci bus space
211 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
212 * struct fcp_rsp and the number of bde's necessary to support the
213 * sg_tablesize.
214 */
215 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
216 &psb->dma_handle);
217 if (!psb->data) {
218 kfree(psb);
219 return NULL;
220 }
221
222 /* Initialize virtual ptrs to dma_buf region. */
223 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
224
225 /* Allocate iotag for psb->cur_iocbq. */
226 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
227 if (iotag == 0) {
228 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
229 psb->data, psb->dma_handle);
230 kfree (psb);
231 return NULL;
232 }
233 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
234
235 psb->fcp_cmnd = psb->data;
236 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
237 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
238 sizeof(struct fcp_rsp);
239
240 /* Initialize local short-hand pointers. */
241 bpl = psb->fcp_bpl;
242 pdma_phys = psb->dma_handle;
243
244 /*
245 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
246 * list bdes. Initialize the first two and leave the rest for
247 * queuecommand.
248 */
249 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
250 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
251 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
252 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
253 bpl->tus.w = le32_to_cpu(bpl->tus.w);
254 bpl++;
255
256 /* Setup the physical region for the FCP RSP */
257 pdma_phys += sizeof (struct fcp_cmnd);
258 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
259 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
260 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
261 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
262 bpl->tus.w = le32_to_cpu(bpl->tus.w);
263
264 /*
265 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
266 * initialize it with all known data now.
267 */
268 pdma_phys += (sizeof (struct fcp_rsp));
269 iocb = &psb->cur_iocbq.iocb;
270 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
271 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
272 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
273 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
274 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
275 iocb->ulpBdeCount = 1;
276 iocb->ulpClass = CLASS3;
277
278 return psb;
279 }
280
281 static struct lpfc_scsi_buf*
282 lpfc_get_scsi_buf(struct lpfc_hba * phba)
283 {
284 struct lpfc_scsi_buf * lpfc_cmd = NULL;
285 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
286 unsigned long iflag = 0;
287
288 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
289 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
290 if (lpfc_cmd) {
291 lpfc_cmd->seg_cnt = 0;
292 lpfc_cmd->nonsg_phys = 0;
293 }
294 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
295 return lpfc_cmd;
296 }
297
298 static void
299 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
300 {
301 unsigned long iflag = 0;
302
303 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
304 psb->pCmd = NULL;
305 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
306 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
307 }
308
309 static int
310 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
311 {
312 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
313 struct scatterlist *sgel = NULL;
314 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
315 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
316 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
317 dma_addr_t physaddr;
318 uint32_t i, num_bde = 0;
319 int nseg, datadir = scsi_cmnd->sc_data_direction;
320
321 /*
322 * There are three possibilities here - use scatter-gather segment, use
323 * the single mapping, or neither. Start the lpfc command prep by
324 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
325 * data bde entry.
326 */
327 bpl += 2;
328 if (scsi_sg_count(scsi_cmnd)) {
329 /*
330 * The driver stores the segment count returned from pci_map_sg
331 * because this a count of dma-mappings used to map the use_sg
332 * pages. They are not guaranteed to be the same for those
333 * architectures that implement an IOMMU.
334 */
335
336 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
337 scsi_sg_count(scsi_cmnd), datadir);
338 if (unlikely(!nseg))
339 return 1;
340
341 lpfc_cmd->seg_cnt = nseg;
342 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
343 printk(KERN_ERR "%s: Too many sg segments from "
344 "dma_map_sg. Config %d, seg_cnt %d",
345 __FUNCTION__, phba->cfg_sg_seg_cnt,
346 lpfc_cmd->seg_cnt);
347 scsi_dma_unmap(scsi_cmnd);
348 return 1;
349 }
350
351 /*
352 * The driver established a maximum scatter-gather segment count
353 * during probe that limits the number of sg elements in any
354 * single scsi command. Just run through the seg_cnt and format
355 * the bde's.
356 */
357 scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) {
358 physaddr = sg_dma_address(sgel);
359 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
360 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
361 bpl->tus.f.bdeSize = sg_dma_len(sgel);
362 if (datadir == DMA_TO_DEVICE)
363 bpl->tus.f.bdeFlags = 0;
364 else
365 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
366 bpl->tus.w = le32_to_cpu(bpl->tus.w);
367 bpl++;
368 num_bde++;
369 }
370 }
371
372 /*
373 * Finish initializing those IOCB fields that are dependent on the
374 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
375 * reinitialized since all iocb memory resources are used many times
376 * for transmit, receive, and continuation bpl's.
377 */
378 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
379 iocb_cmd->un.fcpi64.bdl.bdeSize +=
380 (num_bde * sizeof (struct ulp_bde64));
381 iocb_cmd->ulpBdeCount = 1;
382 iocb_cmd->ulpLe = 1;
383 fcp_cmnd->fcpDl = be32_to_cpu(scsi_bufflen(scsi_cmnd));
384 return 0;
385 }
386
387 static void
388 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
389 {
390 /*
391 * There are only two special cases to consider. (1) the scsi command
392 * requested scatter-gather usage or (2) the scsi command allocated
393 * a request buffer, but did not request use_sg. There is a third
394 * case, but it does not require resource deallocation.
395 */
396 if (psb->seg_cnt > 0)
397 scsi_dma_unmap(psb->pCmd);
398 }
399
400 static void
401 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
402 struct lpfc_iocbq *rsp_iocb)
403 {
404 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
405 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
406 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
407 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
408 uint32_t resp_info = fcprsp->rspStatus2;
409 uint32_t scsi_status = fcprsp->rspStatus3;
410 uint32_t *lp;
411 uint32_t host_status = DID_OK;
412 uint32_t rsplen = 0;
413 uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
414
415 /*
416 * If this is a task management command, there is no
417 * scsi packet associated with this lpfc_cmd. The driver
418 * consumes it.
419 */
420 if (fcpcmd->fcpCntl2) {
421 scsi_status = 0;
422 goto out;
423 }
424
425 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
426 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
427 if (snslen > SCSI_SENSE_BUFFERSIZE)
428 snslen = SCSI_SENSE_BUFFERSIZE;
429
430 if (resp_info & RSP_LEN_VALID)
431 rsplen = be32_to_cpu(fcprsp->rspRspLen);
432 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
433 }
434 lp = (uint32_t *)cmnd->sense_buffer;
435
436 if (!scsi_status && (resp_info & RESID_UNDER))
437 logit = LOG_FCP;
438
439 lpfc_printf_vlog(vport, KERN_WARNING, logit,
440 "0730 FCP command x%x failed: x%x SNS x%x x%x "
441 "Data: x%x x%x x%x x%x x%x\n",
442 cmnd->cmnd[0], scsi_status,
443 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
444 be32_to_cpu(fcprsp->rspResId),
445 be32_to_cpu(fcprsp->rspSnsLen),
446 be32_to_cpu(fcprsp->rspRspLen),
447 fcprsp->rspInfo3);
448
449 if (resp_info & RSP_LEN_VALID) {
450 rsplen = be32_to_cpu(fcprsp->rspRspLen);
451 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
452 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
453 host_status = DID_ERROR;
454 goto out;
455 }
456 }
457
458 scsi_set_resid(cmnd, 0);
459 if (resp_info & RESID_UNDER) {
460 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
461
462 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
463 "0716 FCP Read Underrun, expected %d, "
464 "residual %d Data: x%x x%x x%x\n",
465 be32_to_cpu(fcpcmd->fcpDl),
466 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
467 cmnd->underflow);
468
469 /*
470 * If there is an under run check if under run reported by
471 * storage array is same as the under run reported by HBA.
472 * If this is not same, there is a dropped frame.
473 */
474 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
475 fcpi_parm &&
476 (scsi_get_resid(cmnd) != fcpi_parm)) {
477 lpfc_printf_vlog(vport, KERN_WARNING,
478 LOG_FCP | LOG_FCP_ERROR,
479 "0735 FCP Read Check Error "
480 "and Underrun Data: x%x x%x x%x x%x\n",
481 be32_to_cpu(fcpcmd->fcpDl),
482 scsi_get_resid(cmnd), fcpi_parm,
483 cmnd->cmnd[0]);
484 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
485 host_status = DID_ERROR;
486 }
487 /*
488 * The cmnd->underflow is the minimum number of bytes that must
489 * be transfered for this command. Provided a sense condition
490 * is not present, make sure the actual amount transferred is at
491 * least the underflow value or fail.
492 */
493 if (!(resp_info & SNS_LEN_VALID) &&
494 (scsi_status == SAM_STAT_GOOD) &&
495 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
496 < cmnd->underflow)) {
497 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
498 "0717 FCP command x%x residual "
499 "underrun converted to error "
500 "Data: x%x x%x x%x\n",
501 cmnd->cmnd[0], scsi_bufflen(cmnd),
502 scsi_get_resid(cmnd), cmnd->underflow);
503 host_status = DID_ERROR;
504 }
505 } else if (resp_info & RESID_OVER) {
506 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
507 "0720 FCP command x%x residual overrun error. "
508 "Data: x%x x%x \n", cmnd->cmnd[0],
509 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
510 host_status = DID_ERROR;
511
512 /*
513 * Check SLI validation that all the transfer was actually done
514 * (fcpi_parm should be zero). Apply check only to reads.
515 */
516 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
517 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
518 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
519 "0734 FCP Read Check Error Data: "
520 "x%x x%x x%x x%x\n",
521 be32_to_cpu(fcpcmd->fcpDl),
522 be32_to_cpu(fcprsp->rspResId),
523 fcpi_parm, cmnd->cmnd[0]);
524 host_status = DID_ERROR;
525 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
526 }
527
528 out:
529 cmnd->result = ScsiResult(host_status, scsi_status);
530 }
531
532 static void
533 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
534 struct lpfc_iocbq *pIocbOut)
535 {
536 struct lpfc_scsi_buf *lpfc_cmd =
537 (struct lpfc_scsi_buf *) pIocbIn->context1;
538 struct lpfc_vport *vport = pIocbIn->vport;
539 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
540 struct lpfc_nodelist *pnode = rdata->pnode;
541 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
542 int result;
543 struct scsi_device *sdev, *tmp_sdev;
544 int depth = 0;
545
546 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
547 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
548
549 if (lpfc_cmd->status) {
550 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
551 (lpfc_cmd->result & IOERR_DRVR_MASK))
552 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
553 else if (lpfc_cmd->status >= IOSTAT_CNT)
554 lpfc_cmd->status = IOSTAT_DEFAULT;
555
556 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
557 "0729 FCP cmd x%x failed <%d/%d> "
558 "status: x%x result: x%x Data: x%x x%x\n",
559 cmd->cmnd[0],
560 cmd->device ? cmd->device->id : 0xffff,
561 cmd->device ? cmd->device->lun : 0xffff,
562 lpfc_cmd->status, lpfc_cmd->result,
563 pIocbOut->iocb.ulpContext,
564 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
565
566 switch (lpfc_cmd->status) {
567 case IOSTAT_FCP_RSP_ERROR:
568 /* Call FCP RSP handler to determine result */
569 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
570 break;
571 case IOSTAT_NPORT_BSY:
572 case IOSTAT_FABRIC_BSY:
573 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
574 break;
575 case IOSTAT_LOCAL_REJECT:
576 if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
577 lpfc_cmd->result == IOERR_NO_RESOURCES ||
578 lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
579 cmd->result = ScsiResult(DID_REQUEUE, 0);
580 break;
581 } /* else: fall through */
582 default:
583 cmd->result = ScsiResult(DID_ERROR, 0);
584 break;
585 }
586
587 if ((pnode == NULL )
588 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
589 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
590 } else {
591 cmd->result = ScsiResult(DID_OK, 0);
592 }
593
594 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
595 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
596
597 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
598 "0710 Iodone <%d/%d> cmd %p, error "
599 "x%x SNS x%x x%x Data: x%x x%x\n",
600 cmd->device->id, cmd->device->lun, cmd,
601 cmd->result, *lp, *(lp + 3), cmd->retries,
602 scsi_get_resid(cmd));
603 }
604
605 result = cmd->result;
606 sdev = cmd->device;
607 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
608 cmd->scsi_done(cmd);
609
610 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
611 lpfc_release_scsi_buf(phba, lpfc_cmd);
612 return;
613 }
614
615
616 if (!result)
617 lpfc_rampup_queue_depth(vport, sdev);
618
619 if (!result && pnode != NULL &&
620 ((jiffies - pnode->last_ramp_up_time) >
621 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
622 ((jiffies - pnode->last_q_full_time) >
623 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
624 (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
625 shost_for_each_device(tmp_sdev, sdev->host) {
626 if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
627 if (tmp_sdev->id != sdev->id)
628 continue;
629 if (tmp_sdev->ordered_tags)
630 scsi_adjust_queue_depth(tmp_sdev,
631 MSG_ORDERED_TAG,
632 tmp_sdev->queue_depth+1);
633 else
634 scsi_adjust_queue_depth(tmp_sdev,
635 MSG_SIMPLE_TAG,
636 tmp_sdev->queue_depth+1);
637
638 pnode->last_ramp_up_time = jiffies;
639 }
640 }
641 }
642
643 /*
644 * Check for queue full. If the lun is reporting queue full, then
645 * back off the lun queue depth to prevent target overloads.
646 */
647 if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
648 pnode->last_q_full_time = jiffies;
649
650 shost_for_each_device(tmp_sdev, sdev->host) {
651 if (tmp_sdev->id != sdev->id)
652 continue;
653 depth = scsi_track_queue_full(tmp_sdev,
654 tmp_sdev->queue_depth - 1);
655 }
656 /*
657 * The queue depth cannot be lowered any more.
658 * Modify the returned error code to store
659 * the final depth value set by
660 * scsi_track_queue_full.
661 */
662 if (depth == -1)
663 depth = sdev->host->cmd_per_lun;
664
665 if (depth) {
666 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
667 "0711 detected queue full - lun queue "
668 "depth adjusted to %d.\n", depth);
669 }
670 }
671
672 lpfc_release_scsi_buf(phba, lpfc_cmd);
673 }
674
675 static void
676 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
677 struct lpfc_nodelist *pnode)
678 {
679 struct lpfc_hba *phba = vport->phba;
680 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
681 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
682 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
683 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
684 int datadir = scsi_cmnd->sc_data_direction;
685
686 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
687 /* clear task management bits */
688 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
689
690 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
691 &lpfc_cmd->fcp_cmnd->fcp_lun);
692
693 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
694
695 if (scsi_cmnd->device->tagged_supported) {
696 switch (scsi_cmnd->tag) {
697 case HEAD_OF_QUEUE_TAG:
698 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
699 break;
700 case ORDERED_QUEUE_TAG:
701 fcp_cmnd->fcpCntl1 = ORDERED_Q;
702 break;
703 default:
704 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
705 break;
706 }
707 } else
708 fcp_cmnd->fcpCntl1 = 0;
709
710 /*
711 * There are three possibilities here - use scatter-gather segment, use
712 * the single mapping, or neither. Start the lpfc command prep by
713 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
714 * data bde entry.
715 */
716 if (scsi_sg_count(scsi_cmnd)) {
717 if (datadir == DMA_TO_DEVICE) {
718 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
719 iocb_cmd->un.fcpi.fcpi_parm = 0;
720 iocb_cmd->ulpPU = 0;
721 fcp_cmnd->fcpCntl3 = WRITE_DATA;
722 phba->fc4OutputRequests++;
723 } else {
724 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
725 iocb_cmd->ulpPU = PARM_READ_CHECK;
726 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
727 fcp_cmnd->fcpCntl3 = READ_DATA;
728 phba->fc4InputRequests++;
729 }
730 } else {
731 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
732 iocb_cmd->un.fcpi.fcpi_parm = 0;
733 iocb_cmd->ulpPU = 0;
734 fcp_cmnd->fcpCntl3 = 0;
735 phba->fc4ControlRequests++;
736 }
737
738 /*
739 * Finish initializing those IOCB fields that are independent
740 * of the scsi_cmnd request_buffer
741 */
742 piocbq->iocb.ulpContext = pnode->nlp_rpi;
743 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
744 piocbq->iocb.ulpFCP2Rcvy = 1;
745
746 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
747 piocbq->context1 = lpfc_cmd;
748 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
749 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
750 piocbq->vport = vport;
751 }
752
753 static int
754 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
755 struct lpfc_scsi_buf *lpfc_cmd,
756 unsigned int lun,
757 uint8_t task_mgmt_cmd)
758 {
759 struct lpfc_iocbq *piocbq;
760 IOCB_t *piocb;
761 struct fcp_cmnd *fcp_cmnd;
762 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
763 struct lpfc_nodelist *ndlp = rdata->pnode;
764
765 if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
766 return 0;
767 }
768
769 piocbq = &(lpfc_cmd->cur_iocbq);
770 piocbq->vport = vport;
771
772 piocb = &piocbq->iocb;
773
774 fcp_cmnd = lpfc_cmd->fcp_cmnd;
775 int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
776 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
777
778 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
779
780 piocb->ulpContext = ndlp->nlp_rpi;
781 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
782 piocb->ulpFCP2Rcvy = 1;
783 }
784 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
785
786 /* ulpTimeout is only one byte */
787 if (lpfc_cmd->timeout > 0xff) {
788 /*
789 * Do not timeout the command at the firmware level.
790 * The driver will provide the timeout mechanism.
791 */
792 piocb->ulpTimeout = 0;
793 } else {
794 piocb->ulpTimeout = lpfc_cmd->timeout;
795 }
796
797 return 1;
798 }
799
800 static void
801 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
802 struct lpfc_iocbq *cmdiocbq,
803 struct lpfc_iocbq *rspiocbq)
804 {
805 struct lpfc_scsi_buf *lpfc_cmd =
806 (struct lpfc_scsi_buf *) cmdiocbq->context1;
807 if (lpfc_cmd)
808 lpfc_release_scsi_buf(phba, lpfc_cmd);
809 return;
810 }
811
812 static int
813 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
814 unsigned tgt_id, unsigned int lun,
815 struct lpfc_rport_data *rdata)
816 {
817 struct lpfc_hba *phba = vport->phba;
818 struct lpfc_iocbq *iocbq;
819 struct lpfc_iocbq *iocbqrsp;
820 int ret;
821
822 if (!rdata->pnode)
823 return FAILED;
824
825 lpfc_cmd->rdata = rdata;
826 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
827 FCP_TARGET_RESET);
828 if (!ret)
829 return FAILED;
830
831 iocbq = &lpfc_cmd->cur_iocbq;
832 iocbqrsp = lpfc_sli_get_iocbq(phba);
833
834 if (!iocbqrsp)
835 return FAILED;
836
837 /* Issue Target Reset to TGT <num> */
838 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
839 "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
840 tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
841 ret = lpfc_sli_issue_iocb_wait(phba,
842 &phba->sli.ring[phba->sli.fcp_ring],
843 iocbq, iocbqrsp, lpfc_cmd->timeout);
844 if (ret != IOCB_SUCCESS) {
845 if (ret == IOCB_TIMEDOUT)
846 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
847 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
848 } else {
849 ret = SUCCESS;
850 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
851 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
852 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
853 (lpfc_cmd->result & IOERR_DRVR_MASK))
854 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
855 }
856
857 lpfc_sli_release_iocbq(phba, iocbqrsp);
858 return ret;
859 }
860
861 const char *
862 lpfc_info(struct Scsi_Host *host)
863 {
864 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
865 struct lpfc_hba *phba = vport->phba;
866 int len;
867 static char lpfcinfobuf[384];
868
869 memset(lpfcinfobuf,0,384);
870 if (phba && phba->pcidev){
871 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
872 len = strlen(lpfcinfobuf);
873 snprintf(lpfcinfobuf + len,
874 384-len,
875 " on PCI bus %02x device %02x irq %d",
876 phba->pcidev->bus->number,
877 phba->pcidev->devfn,
878 phba->pcidev->irq);
879 len = strlen(lpfcinfobuf);
880 if (phba->Port[0]) {
881 snprintf(lpfcinfobuf + len,
882 384-len,
883 " port %s",
884 phba->Port);
885 }
886 }
887 return lpfcinfobuf;
888 }
889
890 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
891 {
892 unsigned long poll_tmo_expires =
893 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
894
895 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
896 mod_timer(&phba->fcp_poll_timer,
897 poll_tmo_expires);
898 }
899
900 void lpfc_poll_start_timer(struct lpfc_hba * phba)
901 {
902 lpfc_poll_rearm_timer(phba);
903 }
904
905 void lpfc_poll_timeout(unsigned long ptr)
906 {
907 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
908
909 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
910 lpfc_sli_poll_fcp_ring (phba);
911 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
912 lpfc_poll_rearm_timer(phba);
913 }
914 }
915
916 static int
917 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
918 {
919 struct Scsi_Host *shost = cmnd->device->host;
920 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
921 struct lpfc_hba *phba = vport->phba;
922 struct lpfc_sli *psli = &phba->sli;
923 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
924 struct lpfc_nodelist *ndlp = rdata->pnode;
925 struct lpfc_scsi_buf *lpfc_cmd;
926 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
927 int err;
928
929 err = fc_remote_port_chkready(rport);
930 if (err) {
931 cmnd->result = err;
932 goto out_fail_command;
933 }
934
935 /*
936 * Catch race where our node has transitioned, but the
937 * transport is still transitioning.
938 */
939 if (!ndlp) {
940 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
941 goto out_fail_command;
942 }
943 lpfc_cmd = lpfc_get_scsi_buf(phba);
944 if (lpfc_cmd == NULL) {
945 lpfc_adjust_queue_depth(phba);
946
947 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
948 "0707 driver's buffer pool is empty, "
949 "IO busied\n");
950 goto out_host_busy;
951 }
952
953 /*
954 * Store the midlayer's command structure for the completion phase
955 * and complete the command initialization.
956 */
957 lpfc_cmd->pCmd = cmnd;
958 lpfc_cmd->rdata = rdata;
959 lpfc_cmd->timeout = 0;
960 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
961 cmnd->scsi_done = done;
962
963 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
964 if (err)
965 goto out_host_busy_free_buf;
966
967 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
968
969 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
970 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
971 if (err)
972 goto out_host_busy_free_buf;
973
974 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
975 lpfc_sli_poll_fcp_ring(phba);
976 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
977 lpfc_poll_rearm_timer(phba);
978 }
979
980 return 0;
981
982 out_host_busy_free_buf:
983 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
984 lpfc_release_scsi_buf(phba, lpfc_cmd);
985 out_host_busy:
986 return SCSI_MLQUEUE_HOST_BUSY;
987
988 out_fail_command:
989 done(cmnd);
990 return 0;
991 }
992
993 static void
994 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
995 {
996 struct Scsi_Host *shost = cmnd->device->host;
997 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
998
999 spin_lock_irq(shost->host_lock);
1000 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1001 spin_unlock_irq(shost->host_lock);
1002 msleep(1000);
1003 spin_lock_irq(shost->host_lock);
1004 }
1005 spin_unlock_irq(shost->host_lock);
1006 return;
1007 }
1008
1009 static int
1010 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1011 {
1012 struct Scsi_Host *shost = cmnd->device->host;
1013 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1014 struct lpfc_hba *phba = vport->phba;
1015 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1016 struct lpfc_iocbq *iocb;
1017 struct lpfc_iocbq *abtsiocb;
1018 struct lpfc_scsi_buf *lpfc_cmd;
1019 IOCB_t *cmd, *icmd;
1020 unsigned int loop_count = 0;
1021 int ret = SUCCESS;
1022
1023 lpfc_block_error_handler(cmnd);
1024 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1025 BUG_ON(!lpfc_cmd);
1026
1027 /*
1028 * If pCmd field of the corresponding lpfc_scsi_buf structure
1029 * points to a different SCSI command, then the driver has
1030 * already completed this command, but the midlayer did not
1031 * see the completion before the eh fired. Just return
1032 * SUCCESS.
1033 */
1034 iocb = &lpfc_cmd->cur_iocbq;
1035 if (lpfc_cmd->pCmd != cmnd)
1036 goto out;
1037
1038 BUG_ON(iocb->context1 != lpfc_cmd);
1039
1040 abtsiocb = lpfc_sli_get_iocbq(phba);
1041 if (abtsiocb == NULL) {
1042 ret = FAILED;
1043 goto out;
1044 }
1045
1046 /*
1047 * The scsi command can not be in txq and it is in flight because the
1048 * pCmd is still pointig at the SCSI command we have to abort. There
1049 * is no need to search the txcmplq. Just send an abort to the FW.
1050 */
1051
1052 cmd = &iocb->iocb;
1053 icmd = &abtsiocb->iocb;
1054 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1055 icmd->un.acxri.abortContextTag = cmd->ulpContext;
1056 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1057
1058 icmd->ulpLe = 1;
1059 icmd->ulpClass = cmd->ulpClass;
1060 if (lpfc_is_link_up(phba))
1061 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1062 else
1063 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1064
1065 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1066 abtsiocb->vport = vport;
1067 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1068 lpfc_sli_release_iocbq(phba, abtsiocb);
1069 ret = FAILED;
1070 goto out;
1071 }
1072
1073 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1074 lpfc_sli_poll_fcp_ring (phba);
1075
1076 /* Wait for abort to complete */
1077 while (lpfc_cmd->pCmd == cmnd)
1078 {
1079 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1080 lpfc_sli_poll_fcp_ring (phba);
1081
1082 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT * HZ);
1083 if (++loop_count
1084 > (2 * vport->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
1085 break;
1086 }
1087
1088 if (lpfc_cmd->pCmd == cmnd) {
1089 ret = FAILED;
1090 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1091 "0748 abort handler timed out waiting "
1092 "for abort to complete: ret %#x, ID %d, "
1093 "LUN %d, snum %#lx\n",
1094 ret, cmnd->device->id, cmnd->device->lun,
1095 cmnd->serial_number);
1096 }
1097
1098 out:
1099 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1100 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1101 "LUN %d snum %#lx\n", ret, cmnd->device->id,
1102 cmnd->device->lun, cmnd->serial_number);
1103 return ret;
1104 }
1105
1106 static int
1107 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1108 {
1109 struct Scsi_Host *shost = cmnd->device->host;
1110 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1111 struct lpfc_hba *phba = vport->phba;
1112 struct lpfc_scsi_buf *lpfc_cmd;
1113 struct lpfc_iocbq *iocbq, *iocbqrsp;
1114 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1115 struct lpfc_nodelist *pnode = rdata->pnode;
1116 uint32_t cmd_result = 0, cmd_status = 0;
1117 int ret = FAILED;
1118 int iocb_status = IOCB_SUCCESS;
1119 int cnt, loopcnt;
1120
1121 lpfc_block_error_handler(cmnd);
1122 loopcnt = 0;
1123 /*
1124 * If target is not in a MAPPED state, delay the reset until
1125 * target is rediscovered or devloss timeout expires.
1126 */
1127 while (1) {
1128 if (!pnode)
1129 goto out;
1130
1131 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1132 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1133 loopcnt++;
1134 rdata = cmnd->device->hostdata;
1135 if (!rdata ||
1136 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1137 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1138 "0721 LUN Reset rport "
1139 "failure: cnt x%x rdata x%p\n",
1140 loopcnt, rdata);
1141 goto out;
1142 }
1143 pnode = rdata->pnode;
1144 if (!pnode)
1145 goto out;
1146 }
1147 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1148 break;
1149 }
1150
1151 lpfc_cmd = lpfc_get_scsi_buf(phba);
1152 if (lpfc_cmd == NULL)
1153 goto out;
1154
1155 lpfc_cmd->timeout = 60;
1156 lpfc_cmd->rdata = rdata;
1157
1158 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1159 FCP_TARGET_RESET);
1160 if (!ret)
1161 goto out_free_scsi_buf;
1162
1163 iocbq = &lpfc_cmd->cur_iocbq;
1164
1165 /* get a buffer for this IOCB command response */
1166 iocbqrsp = lpfc_sli_get_iocbq(phba);
1167 if (iocbqrsp == NULL)
1168 goto out_free_scsi_buf;
1169
1170 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1171 "0703 Issue target reset to TGT %d LUN %d "
1172 "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1173 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1174 iocb_status = lpfc_sli_issue_iocb_wait(phba,
1175 &phba->sli.ring[phba->sli.fcp_ring],
1176 iocbq, iocbqrsp, lpfc_cmd->timeout);
1177
1178 if (iocb_status == IOCB_TIMEDOUT)
1179 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1180
1181 if (iocb_status == IOCB_SUCCESS)
1182 ret = SUCCESS;
1183 else
1184 ret = iocb_status;
1185
1186 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1187 cmd_status = iocbqrsp->iocb.ulpStatus;
1188
1189 lpfc_sli_release_iocbq(phba, iocbqrsp);
1190
1191 /*
1192 * All outstanding txcmplq I/Os should have been aborted by the device.
1193 * Unfortunately, some targets do not abide by this forcing the driver
1194 * to double check.
1195 */
1196 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1197 LPFC_CTX_LUN);
1198 if (cnt)
1199 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1200 cmnd->device->id, cmnd->device->lun,
1201 LPFC_CTX_LUN);
1202 loopcnt = 0;
1203 while(cnt) {
1204 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1205
1206 if (++loopcnt
1207 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1208 break;
1209
1210 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1211 cmnd->device->lun, LPFC_CTX_LUN);
1212 }
1213
1214 if (cnt) {
1215 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1216 "0719 device reset I/O flush failure: "
1217 "cnt x%x\n", cnt);
1218 ret = FAILED;
1219 }
1220
1221 out_free_scsi_buf:
1222 if (iocb_status != IOCB_TIMEDOUT) {
1223 lpfc_release_scsi_buf(phba, lpfc_cmd);
1224 }
1225 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1226 "0713 SCSI layer issued device reset (%d, %d) "
1227 "return x%x status x%x result x%x\n",
1228 cmnd->device->id, cmnd->device->lun, ret,
1229 cmd_status, cmd_result);
1230 out:
1231 return ret;
1232 }
1233
1234 static int
1235 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1236 {
1237 struct Scsi_Host *shost = cmnd->device->host;
1238 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1239 struct lpfc_hba *phba = vport->phba;
1240 struct lpfc_nodelist *ndlp = NULL;
1241 int match;
1242 int ret = FAILED, i, err_count = 0;
1243 int cnt, loopcnt;
1244 struct lpfc_scsi_buf * lpfc_cmd;
1245
1246 lpfc_block_error_handler(cmnd);
1247
1248 lpfc_cmd = lpfc_get_scsi_buf(phba);
1249 if (lpfc_cmd == NULL)
1250 goto out;
1251
1252 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1253 lpfc_cmd->timeout = 60;
1254
1255 /*
1256 * Since the driver manages a single bus device, reset all
1257 * targets known to the driver. Should any target reset
1258 * fail, this routine returns failure to the midlayer.
1259 */
1260 for (i = 0; i < LPFC_MAX_TARGET; i++) {
1261 /* Search for mapped node by target ID */
1262 match = 0;
1263 spin_lock_irq(shost->host_lock);
1264 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1265 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1266 i == ndlp->nlp_sid &&
1267 ndlp->rport) {
1268 match = 1;
1269 break;
1270 }
1271 }
1272 spin_unlock_irq(shost->host_lock);
1273 if (!match)
1274 continue;
1275
1276 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1277 cmnd->device->lun,
1278 ndlp->rport->dd_data);
1279 if (ret != SUCCESS) {
1280 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1281 "0700 Bus Reset on target %d failed\n",
1282 i);
1283 err_count++;
1284 break;
1285 }
1286 }
1287
1288 if (ret != IOCB_TIMEDOUT)
1289 lpfc_release_scsi_buf(phba, lpfc_cmd);
1290
1291 if (err_count == 0)
1292 ret = SUCCESS;
1293 else
1294 ret = FAILED;
1295
1296 /*
1297 * All outstanding txcmplq I/Os should have been aborted by
1298 * the targets. Unfortunately, some targets do not abide by
1299 * this forcing the driver to double check.
1300 */
1301 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1302 if (cnt)
1303 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1304 0, 0, LPFC_CTX_HOST);
1305 loopcnt = 0;
1306 while(cnt) {
1307 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1308
1309 if (++loopcnt
1310 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1311 break;
1312
1313 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1314 }
1315
1316 if (cnt) {
1317 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1318 "0715 Bus Reset I/O flush failure: "
1319 "cnt x%x left x%x\n", cnt, i);
1320 ret = FAILED;
1321 }
1322
1323 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1324 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1325 out:
1326 return ret;
1327 }
1328
1329 static int
1330 lpfc_slave_alloc(struct scsi_device *sdev)
1331 {
1332 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1333 struct lpfc_hba *phba = vport->phba;
1334 struct lpfc_scsi_buf *scsi_buf = NULL;
1335 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1336 uint32_t total = 0, i;
1337 uint32_t num_to_alloc = 0;
1338 unsigned long flags;
1339
1340 if (!rport || fc_remote_port_chkready(rport))
1341 return -ENXIO;
1342
1343 sdev->hostdata = rport->dd_data;
1344
1345 /*
1346 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1347 * available list of scsi buffers. Don't allocate more than the
1348 * HBA limit conveyed to the midlayer via the host structure. The
1349 * formula accounts for the lun_queue_depth + error handlers + 1
1350 * extra. This list of scsi bufs exists for the lifetime of the driver.
1351 */
1352 total = phba->total_scsi_bufs;
1353 num_to_alloc = vport->cfg_lun_queue_depth + 2;
1354
1355 /* Allow some exchanges to be available always to complete discovery */
1356 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1357 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1358 "0704 At limitation of %d preallocated "
1359 "command buffers\n", total);
1360 return 0;
1361 /* Allow some exchanges to be available always to complete discovery */
1362 } else if (total + num_to_alloc >
1363 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1364 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1365 "0705 Allocation request of %d "
1366 "command buffers will exceed max of %d. "
1367 "Reducing allocation request to %d.\n",
1368 num_to_alloc, phba->cfg_hba_queue_depth,
1369 (phba->cfg_hba_queue_depth - total));
1370 num_to_alloc = phba->cfg_hba_queue_depth - total;
1371 }
1372
1373 for (i = 0; i < num_to_alloc; i++) {
1374 scsi_buf = lpfc_new_scsi_buf(vport);
1375 if (!scsi_buf) {
1376 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1377 "0706 Failed to allocate "
1378 "command buffer\n");
1379 break;
1380 }
1381
1382 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1383 phba->total_scsi_bufs++;
1384 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1385 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1386 }
1387 return 0;
1388 }
1389
1390 static int
1391 lpfc_slave_configure(struct scsi_device *sdev)
1392 {
1393 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1394 struct lpfc_hba *phba = vport->phba;
1395 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1396
1397 if (sdev->tagged_supported)
1398 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1399 else
1400 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1401
1402 /*
1403 * Initialize the fc transport attributes for the target
1404 * containing this scsi device. Also note that the driver's
1405 * target pointer is stored in the starget_data for the
1406 * driver's sysfs entry point functions.
1407 */
1408 rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1409
1410 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1411 lpfc_sli_poll_fcp_ring(phba);
1412 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1413 lpfc_poll_rearm_timer(phba);
1414 }
1415
1416 return 0;
1417 }
1418
1419 static void
1420 lpfc_slave_destroy(struct scsi_device *sdev)
1421 {
1422 sdev->hostdata = NULL;
1423 return;
1424 }
1425
1426
1427 struct scsi_host_template lpfc_template = {
1428 .module = THIS_MODULE,
1429 .name = LPFC_DRIVER_NAME,
1430 .info = lpfc_info,
1431 .queuecommand = lpfc_queuecommand,
1432 .eh_abort_handler = lpfc_abort_handler,
1433 .eh_device_reset_handler= lpfc_device_reset_handler,
1434 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1435 .slave_alloc = lpfc_slave_alloc,
1436 .slave_configure = lpfc_slave_configure,
1437 .slave_destroy = lpfc_slave_destroy,
1438 .scan_finished = lpfc_scan_finished,
1439 .this_id = -1,
1440 .sg_tablesize = LPFC_SG_SEG_CNT,
1441 .use_sg_chaining = ENABLE_SG_CHAINING,
1442 .cmd_per_lun = LPFC_CMD_PER_LUN,
1443 .use_clustering = ENABLE_CLUSTERING,
1444 .shost_attrs = lpfc_hba_attrs,
1445 .max_sectors = 0xFFFF,
1446 };
1447
1448 struct scsi_host_template lpfc_vport_template = {
1449 .module = THIS_MODULE,
1450 .name = LPFC_DRIVER_NAME,
1451 .info = lpfc_info,
1452 .queuecommand = lpfc_queuecommand,
1453 .eh_abort_handler = lpfc_abort_handler,
1454 .eh_device_reset_handler= lpfc_device_reset_handler,
1455 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1456 .slave_alloc = lpfc_slave_alloc,
1457 .slave_configure = lpfc_slave_configure,
1458 .slave_destroy = lpfc_slave_destroy,
1459 .scan_finished = lpfc_scan_finished,
1460 .this_id = -1,
1461 .sg_tablesize = LPFC_SG_SEG_CNT,
1462 .cmd_per_lun = LPFC_CMD_PER_LUN,
1463 .use_clustering = ENABLE_CLUSTERING,
1464 .use_sg_chaining = ENABLE_SG_CHAINING,
1465 .shost_attrs = lpfc_vport_attrs,
1466 .max_sectors = 0xFFFF,
1467 };
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