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[SCSI] lpfc 8.2.6 : Multiple discovery fixes
[linux-2.6/libata-dev.git] / drivers / scsi / lpfc / lpfc_scsi.c
blob6df8bc003a88eb73630662f64ffcb9240569d78d
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2008 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 <= phba->max_vpi && 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(phba, 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 <= phba->max_vpi && 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(phba, 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 = cpu_to_be32(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 unsigned long flags;
546
547 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
548 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
549
550 if (lpfc_cmd->status) {
551 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
552 (lpfc_cmd->result & IOERR_DRVR_MASK))
553 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
554 else if (lpfc_cmd->status >= IOSTAT_CNT)
555 lpfc_cmd->status = IOSTAT_DEFAULT;
556
557 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
558 "0729 FCP cmd x%x failed <%d/%d> "
559 "status: x%x result: x%x Data: x%x x%x\n",
560 cmd->cmnd[0],
561 cmd->device ? cmd->device->id : 0xffff,
562 cmd->device ? cmd->device->lun : 0xffff,
563 lpfc_cmd->status, lpfc_cmd->result,
564 pIocbOut->iocb.ulpContext,
565 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
566
567 switch (lpfc_cmd->status) {
568 case IOSTAT_FCP_RSP_ERROR:
569 /* Call FCP RSP handler to determine result */
570 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
571 break;
572 case IOSTAT_NPORT_BSY:
573 case IOSTAT_FABRIC_BSY:
574 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
575 break;
576 case IOSTAT_LOCAL_REJECT:
577 if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
578 lpfc_cmd->result == IOERR_NO_RESOURCES ||
579 lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
580 cmd->result = ScsiResult(DID_REQUEUE, 0);
581 break;
582 } /* else: fall through */
583 default:
584 cmd->result = ScsiResult(DID_ERROR, 0);
585 break;
586 }
587
588 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
589 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
590 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
591 } else {
592 cmd->result = ScsiResult(DID_OK, 0);
593 }
594
595 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
596 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
597
598 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
599 "0710 Iodone <%d/%d> cmd %p, error "
600 "x%x SNS x%x x%x Data: x%x x%x\n",
601 cmd->device->id, cmd->device->lun, cmd,
602 cmd->result, *lp, *(lp + 3), cmd->retries,
603 scsi_get_resid(cmd));
604 }
605
606 result = cmd->result;
607 sdev = cmd->device;
608 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
609 cmd->scsi_done(cmd);
610
611 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
612 /*
613 * If there is a thread waiting for command completion
614 * wake up the thread.
615 */
616 spin_lock_irqsave(sdev->host->host_lock, flags);
617 lpfc_cmd->pCmd = NULL;
618 if (lpfc_cmd->waitq)
619 wake_up(lpfc_cmd->waitq);
620 spin_unlock_irqrestore(sdev->host->host_lock, flags);
621 lpfc_release_scsi_buf(phba, lpfc_cmd);
622 return;
623 }
624
625
626 if (!result)
627 lpfc_rampup_queue_depth(vport, sdev);
628
629 if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
630 ((jiffies - pnode->last_ramp_up_time) >
631 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
632 ((jiffies - pnode->last_q_full_time) >
633 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
634 (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
635 shost_for_each_device(tmp_sdev, sdev->host) {
636 if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
637 if (tmp_sdev->id != sdev->id)
638 continue;
639 if (tmp_sdev->ordered_tags)
640 scsi_adjust_queue_depth(tmp_sdev,
641 MSG_ORDERED_TAG,
642 tmp_sdev->queue_depth+1);
643 else
644 scsi_adjust_queue_depth(tmp_sdev,
645 MSG_SIMPLE_TAG,
646 tmp_sdev->queue_depth+1);
647
648 pnode->last_ramp_up_time = jiffies;
649 }
650 }
651 }
652
653 /*
654 * Check for queue full. If the lun is reporting queue full, then
655 * back off the lun queue depth to prevent target overloads.
656 */
657 if (result == SAM_STAT_TASK_SET_FULL && pnode &&
658 NLP_CHK_NODE_ACT(pnode)) {
659 pnode->last_q_full_time = jiffies;
660
661 shost_for_each_device(tmp_sdev, sdev->host) {
662 if (tmp_sdev->id != sdev->id)
663 continue;
664 depth = scsi_track_queue_full(tmp_sdev,
665 tmp_sdev->queue_depth - 1);
666 }
667 /*
668 * The queue depth cannot be lowered any more.
669 * Modify the returned error code to store
670 * the final depth value set by
671 * scsi_track_queue_full.
672 */
673 if (depth == -1)
674 depth = sdev->host->cmd_per_lun;
675
676 if (depth) {
677 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
678 "0711 detected queue full - lun queue "
679 "depth adjusted to %d.\n", depth);
680 }
681 }
682
683 /*
684 * If there is a thread waiting for command completion
685 * wake up the thread.
686 */
687 spin_lock_irqsave(sdev->host->host_lock, flags);
688 lpfc_cmd->pCmd = NULL;
689 if (lpfc_cmd->waitq)
690 wake_up(lpfc_cmd->waitq);
691 spin_unlock_irqrestore(sdev->host->host_lock, flags);
692
693 lpfc_release_scsi_buf(phba, lpfc_cmd);
694 }
695
696 static void
697 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
698 struct lpfc_nodelist *pnode)
699 {
700 struct lpfc_hba *phba = vport->phba;
701 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
702 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
703 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
704 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
705 int datadir = scsi_cmnd->sc_data_direction;
706 char tag[2];
707
708 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
709 return;
710
711 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
712 /* clear task management bits */
713 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
714
715 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
716 &lpfc_cmd->fcp_cmnd->fcp_lun);
717
718 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
719
720 if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
721 switch (tag[0]) {
722 case HEAD_OF_QUEUE_TAG:
723 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
724 break;
725 case ORDERED_QUEUE_TAG:
726 fcp_cmnd->fcpCntl1 = ORDERED_Q;
727 break;
728 default:
729 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
730 break;
731 }
732 } else
733 fcp_cmnd->fcpCntl1 = 0;
734
735 /*
736 * There are three possibilities here - use scatter-gather segment, use
737 * the single mapping, or neither. Start the lpfc command prep by
738 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
739 * data bde entry.
740 */
741 if (scsi_sg_count(scsi_cmnd)) {
742 if (datadir == DMA_TO_DEVICE) {
743 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
744 iocb_cmd->un.fcpi.fcpi_parm = 0;
745 iocb_cmd->ulpPU = 0;
746 fcp_cmnd->fcpCntl3 = WRITE_DATA;
747 phba->fc4OutputRequests++;
748 } else {
749 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
750 iocb_cmd->ulpPU = PARM_READ_CHECK;
751 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
752 fcp_cmnd->fcpCntl3 = READ_DATA;
753 phba->fc4InputRequests++;
754 }
755 } else {
756 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
757 iocb_cmd->un.fcpi.fcpi_parm = 0;
758 iocb_cmd->ulpPU = 0;
759 fcp_cmnd->fcpCntl3 = 0;
760 phba->fc4ControlRequests++;
761 }
762
763 /*
764 * Finish initializing those IOCB fields that are independent
765 * of the scsi_cmnd request_buffer
766 */
767 piocbq->iocb.ulpContext = pnode->nlp_rpi;
768 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
769 piocbq->iocb.ulpFCP2Rcvy = 1;
770 else
771 piocbq->iocb.ulpFCP2Rcvy = 0;
772
773 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
774 piocbq->context1 = lpfc_cmd;
775 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
776 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
777 piocbq->vport = vport;
778 }
779
780 static int
781 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
782 struct lpfc_scsi_buf *lpfc_cmd,
783 unsigned int lun,
784 uint8_t task_mgmt_cmd)
785 {
786 struct lpfc_iocbq *piocbq;
787 IOCB_t *piocb;
788 struct fcp_cmnd *fcp_cmnd;
789 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
790 struct lpfc_nodelist *ndlp = rdata->pnode;
791
792 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
793 ndlp->nlp_state != NLP_STE_MAPPED_NODE)
794 return 0;
795
796 piocbq = &(lpfc_cmd->cur_iocbq);
797 piocbq->vport = vport;
798
799 piocb = &piocbq->iocb;
800
801 fcp_cmnd = lpfc_cmd->fcp_cmnd;
802 int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
803 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
804
805 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
806
807 piocb->ulpContext = ndlp->nlp_rpi;
808 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
809 piocb->ulpFCP2Rcvy = 1;
810 }
811 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
812
813 /* ulpTimeout is only one byte */
814 if (lpfc_cmd->timeout > 0xff) {
815 /*
816 * Do not timeout the command at the firmware level.
817 * The driver will provide the timeout mechanism.
818 */
819 piocb->ulpTimeout = 0;
820 } else {
821 piocb->ulpTimeout = lpfc_cmd->timeout;
822 }
823
824 return 1;
825 }
826
827 static void
828 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
829 struct lpfc_iocbq *cmdiocbq,
830 struct lpfc_iocbq *rspiocbq)
831 {
832 struct lpfc_scsi_buf *lpfc_cmd =
833 (struct lpfc_scsi_buf *) cmdiocbq->context1;
834 if (lpfc_cmd)
835 lpfc_release_scsi_buf(phba, lpfc_cmd);
836 return;
837 }
838
839 static int
840 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
841 unsigned tgt_id, unsigned int lun,
842 struct lpfc_rport_data *rdata)
843 {
844 struct lpfc_hba *phba = vport->phba;
845 struct lpfc_iocbq *iocbq;
846 struct lpfc_iocbq *iocbqrsp;
847 int ret;
848
849 if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
850 return FAILED;
851
852 lpfc_cmd->rdata = rdata;
853 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
854 FCP_TARGET_RESET);
855 if (!ret)
856 return FAILED;
857
858 iocbq = &lpfc_cmd->cur_iocbq;
859 iocbqrsp = lpfc_sli_get_iocbq(phba);
860
861 if (!iocbqrsp)
862 return FAILED;
863
864 /* Issue Target Reset to TGT <num> */
865 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
866 "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
867 tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
868 ret = lpfc_sli_issue_iocb_wait(phba,
869 &phba->sli.ring[phba->sli.fcp_ring],
870 iocbq, iocbqrsp, lpfc_cmd->timeout);
871 if (ret != IOCB_SUCCESS) {
872 if (ret == IOCB_TIMEDOUT)
873 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
874 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
875 } else {
876 ret = SUCCESS;
877 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
878 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
879 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
880 (lpfc_cmd->result & IOERR_DRVR_MASK))
881 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
882 }
883
884 lpfc_sli_release_iocbq(phba, iocbqrsp);
885 return ret;
886 }
887
888 const char *
889 lpfc_info(struct Scsi_Host *host)
890 {
891 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
892 struct lpfc_hba *phba = vport->phba;
893 int len;
894 static char lpfcinfobuf[384];
895
896 memset(lpfcinfobuf,0,384);
897 if (phba && phba->pcidev){
898 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
899 len = strlen(lpfcinfobuf);
900 snprintf(lpfcinfobuf + len,
901 384-len,
902 " on PCI bus %02x device %02x irq %d",
903 phba->pcidev->bus->number,
904 phba->pcidev->devfn,
905 phba->pcidev->irq);
906 len = strlen(lpfcinfobuf);
907 if (phba->Port[0]) {
908 snprintf(lpfcinfobuf + len,
909 384-len,
910 " port %s",
911 phba->Port);
912 }
913 }
914 return lpfcinfobuf;
915 }
916
917 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
918 {
919 unsigned long poll_tmo_expires =
920 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
921
922 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
923 mod_timer(&phba->fcp_poll_timer,
924 poll_tmo_expires);
925 }
926
927 void lpfc_poll_start_timer(struct lpfc_hba * phba)
928 {
929 lpfc_poll_rearm_timer(phba);
930 }
931
932 void lpfc_poll_timeout(unsigned long ptr)
933 {
934 struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
935
936 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
937 lpfc_sli_poll_fcp_ring (phba);
938 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
939 lpfc_poll_rearm_timer(phba);
940 }
941 }
942
943 static int
944 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
945 {
946 struct Scsi_Host *shost = cmnd->device->host;
947 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
948 struct lpfc_hba *phba = vport->phba;
949 struct lpfc_sli *psli = &phba->sli;
950 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
951 struct lpfc_nodelist *ndlp = rdata->pnode;
952 struct lpfc_scsi_buf *lpfc_cmd;
953 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
954 int err;
955
956 err = fc_remote_port_chkready(rport);
957 if (err) {
958 cmnd->result = err;
959 goto out_fail_command;
960 }
961
962 /*
963 * Catch race where our node has transitioned, but the
964 * transport is still transitioning.
965 */
966 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
967 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
968 goto out_fail_command;
969 }
970 lpfc_cmd = lpfc_get_scsi_buf(phba);
971 if (lpfc_cmd == NULL) {
972 lpfc_adjust_queue_depth(phba);
973
974 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
975 "0707 driver's buffer pool is empty, "
976 "IO busied\n");
977 goto out_host_busy;
978 }
979
980 /*
981 * Store the midlayer's command structure for the completion phase
982 * and complete the command initialization.
983 */
984 lpfc_cmd->pCmd = cmnd;
985 lpfc_cmd->rdata = rdata;
986 lpfc_cmd->timeout = 0;
987 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
988 cmnd->scsi_done = done;
989
990 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
991 if (err)
992 goto out_host_busy_free_buf;
993
994 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
995
996 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
997 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
998 if (err)
999 goto out_host_busy_free_buf;
1000
1001 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1002 lpfc_sli_poll_fcp_ring(phba);
1003 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1004 lpfc_poll_rearm_timer(phba);
1005 }
1006
1007 return 0;
1008
1009 out_host_busy_free_buf:
1010 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1011 lpfc_release_scsi_buf(phba, lpfc_cmd);
1012 out_host_busy:
1013 return SCSI_MLQUEUE_HOST_BUSY;
1014
1015 out_fail_command:
1016 done(cmnd);
1017 return 0;
1018 }
1019
1020 static void
1021 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1022 {
1023 struct Scsi_Host *shost = cmnd->device->host;
1024 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1025
1026 spin_lock_irq(shost->host_lock);
1027 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1028 spin_unlock_irq(shost->host_lock);
1029 msleep(1000);
1030 spin_lock_irq(shost->host_lock);
1031 }
1032 spin_unlock_irq(shost->host_lock);
1033 return;
1034 }
1035
1036 static int
1037 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1038 {
1039 struct Scsi_Host *shost = cmnd->device->host;
1040 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1041 struct lpfc_hba *phba = vport->phba;
1042 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1043 struct lpfc_iocbq *iocb;
1044 struct lpfc_iocbq *abtsiocb;
1045 struct lpfc_scsi_buf *lpfc_cmd;
1046 IOCB_t *cmd, *icmd;
1047 int ret = SUCCESS;
1048 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1049
1050 lpfc_block_error_handler(cmnd);
1051 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1052 BUG_ON(!lpfc_cmd);
1053
1054 /*
1055 * If pCmd field of the corresponding lpfc_scsi_buf structure
1056 * points to a different SCSI command, then the driver has
1057 * already completed this command, but the midlayer did not
1058 * see the completion before the eh fired. Just return
1059 * SUCCESS.
1060 */
1061 iocb = &lpfc_cmd->cur_iocbq;
1062 if (lpfc_cmd->pCmd != cmnd)
1063 goto out;
1064
1065 BUG_ON(iocb->context1 != lpfc_cmd);
1066
1067 abtsiocb = lpfc_sli_get_iocbq(phba);
1068 if (abtsiocb == NULL) {
1069 ret = FAILED;
1070 goto out;
1071 }
1072
1073 /*
1074 * The scsi command can not be in txq and it is in flight because the
1075 * pCmd is still pointig at the SCSI command we have to abort. There
1076 * is no need to search the txcmplq. Just send an abort to the FW.
1077 */
1078
1079 cmd = &iocb->iocb;
1080 icmd = &abtsiocb->iocb;
1081 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1082 icmd->un.acxri.abortContextTag = cmd->ulpContext;
1083 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1084
1085 icmd->ulpLe = 1;
1086 icmd->ulpClass = cmd->ulpClass;
1087 if (lpfc_is_link_up(phba))
1088 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1089 else
1090 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1091
1092 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1093 abtsiocb->vport = vport;
1094 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1095 lpfc_sli_release_iocbq(phba, abtsiocb);
1096 ret = FAILED;
1097 goto out;
1098 }
1099
1100 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1101 lpfc_sli_poll_fcp_ring (phba);
1102
1103 lpfc_cmd->waitq = &waitq;
1104 /* Wait for abort to complete */
1105 wait_event_timeout(waitq,
1106 (lpfc_cmd->pCmd != cmnd),
1107 (2*vport->cfg_devloss_tmo*HZ));
1108
1109 spin_lock_irq(shost->host_lock);
1110 lpfc_cmd->waitq = NULL;
1111 spin_unlock_irq(shost->host_lock);
1112
1113 if (lpfc_cmd->pCmd == cmnd) {
1114 ret = FAILED;
1115 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1116 "0748 abort handler timed out waiting "
1117 "for abort to complete: ret %#x, ID %d, "
1118 "LUN %d, snum %#lx\n",
1119 ret, cmnd->device->id, cmnd->device->lun,
1120 cmnd->serial_number);
1121 }
1122
1123 out:
1124 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1125 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1126 "LUN %d snum %#lx\n", ret, cmnd->device->id,
1127 cmnd->device->lun, cmnd->serial_number);
1128 return ret;
1129 }
1130
1131 static int
1132 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1133 {
1134 struct Scsi_Host *shost = cmnd->device->host;
1135 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1136 struct lpfc_hba *phba = vport->phba;
1137 struct lpfc_scsi_buf *lpfc_cmd;
1138 struct lpfc_iocbq *iocbq, *iocbqrsp;
1139 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1140 struct lpfc_nodelist *pnode = rdata->pnode;
1141 uint32_t cmd_result = 0, cmd_status = 0;
1142 int ret = FAILED;
1143 int iocb_status = IOCB_SUCCESS;
1144 int cnt, loopcnt;
1145
1146 lpfc_block_error_handler(cmnd);
1147 loopcnt = 0;
1148 /*
1149 * If target is not in a MAPPED state, delay the reset until
1150 * target is rediscovered or devloss timeout expires.
1151 */
1152 while (1) {
1153 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1154 goto out;
1155
1156 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1157 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1158 loopcnt++;
1159 rdata = cmnd->device->hostdata;
1160 if (!rdata ||
1161 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1162 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1163 "0721 LUN Reset rport "
1164 "failure: cnt x%x rdata x%p\n",
1165 loopcnt, rdata);
1166 goto out;
1167 }
1168 pnode = rdata->pnode;
1169 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1170 goto out;
1171 }
1172 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1173 break;
1174 }
1175
1176 lpfc_cmd = lpfc_get_scsi_buf(phba);
1177 if (lpfc_cmd == NULL)
1178 goto out;
1179
1180 lpfc_cmd->timeout = 60;
1181 lpfc_cmd->rdata = rdata;
1182
1183 ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1184 FCP_TARGET_RESET);
1185 if (!ret)
1186 goto out_free_scsi_buf;
1187
1188 iocbq = &lpfc_cmd->cur_iocbq;
1189
1190 /* get a buffer for this IOCB command response */
1191 iocbqrsp = lpfc_sli_get_iocbq(phba);
1192 if (iocbqrsp == NULL)
1193 goto out_free_scsi_buf;
1194
1195 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1196 "0703 Issue target reset to TGT %d LUN %d "
1197 "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1198 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1199 iocb_status = lpfc_sli_issue_iocb_wait(phba,
1200 &phba->sli.ring[phba->sli.fcp_ring],
1201 iocbq, iocbqrsp, lpfc_cmd->timeout);
1202
1203 if (iocb_status == IOCB_TIMEDOUT)
1204 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1205
1206 if (iocb_status == IOCB_SUCCESS)
1207 ret = SUCCESS;
1208 else
1209 ret = iocb_status;
1210
1211 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1212 cmd_status = iocbqrsp->iocb.ulpStatus;
1213
1214 lpfc_sli_release_iocbq(phba, iocbqrsp);
1215
1216 /*
1217 * All outstanding txcmplq I/Os should have been aborted by the device.
1218 * Unfortunately, some targets do not abide by this forcing the driver
1219 * to double check.
1220 */
1221 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1222 LPFC_CTX_LUN);
1223 if (cnt)
1224 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1225 cmnd->device->id, cmnd->device->lun,
1226 LPFC_CTX_LUN);
1227 loopcnt = 0;
1228 while(cnt) {
1229 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1230
1231 if (++loopcnt
1232 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1233 break;
1234
1235 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1236 cmnd->device->lun, LPFC_CTX_LUN);
1237 }
1238
1239 if (cnt) {
1240 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1241 "0719 device reset I/O flush failure: "
1242 "cnt x%x\n", cnt);
1243 ret = FAILED;
1244 }
1245
1246 out_free_scsi_buf:
1247 if (iocb_status != IOCB_TIMEDOUT) {
1248 lpfc_release_scsi_buf(phba, lpfc_cmd);
1249 }
1250 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1251 "0713 SCSI layer issued device reset (%d, %d) "
1252 "return x%x status x%x result x%x\n",
1253 cmnd->device->id, cmnd->device->lun, ret,
1254 cmd_status, cmd_result);
1255 out:
1256 return ret;
1257 }
1258
1259 static int
1260 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1261 {
1262 struct Scsi_Host *shost = cmnd->device->host;
1263 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1264 struct lpfc_hba *phba = vport->phba;
1265 struct lpfc_nodelist *ndlp = NULL;
1266 int match;
1267 int ret = FAILED, i, err_count = 0;
1268 int cnt, loopcnt;
1269 struct lpfc_scsi_buf * lpfc_cmd;
1270
1271 lpfc_block_error_handler(cmnd);
1272
1273 lpfc_cmd = lpfc_get_scsi_buf(phba);
1274 if (lpfc_cmd == NULL)
1275 goto out;
1276
1277 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1278 lpfc_cmd->timeout = 60;
1279
1280 /*
1281 * Since the driver manages a single bus device, reset all
1282 * targets known to the driver. Should any target reset
1283 * fail, this routine returns failure to the midlayer.
1284 */
1285 for (i = 0; i < LPFC_MAX_TARGET; i++) {
1286 /* Search for mapped node by target ID */
1287 match = 0;
1288 spin_lock_irq(shost->host_lock);
1289 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1290 if (!NLP_CHK_NODE_ACT(ndlp))
1291 continue;
1292 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1293 i == ndlp->nlp_sid &&
1294 ndlp->rport) {
1295 match = 1;
1296 break;
1297 }
1298 }
1299 spin_unlock_irq(shost->host_lock);
1300 if (!match)
1301 continue;
1302
1303 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1304 cmnd->device->lun,
1305 ndlp->rport->dd_data);
1306 if (ret != SUCCESS) {
1307 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1308 "0700 Bus Reset on target %d failed\n",
1309 i);
1310 err_count++;
1311 break;
1312 }
1313 }
1314
1315 if (ret != IOCB_TIMEDOUT)
1316 lpfc_release_scsi_buf(phba, lpfc_cmd);
1317
1318 if (err_count == 0)
1319 ret = SUCCESS;
1320 else
1321 ret = FAILED;
1322
1323 /*
1324 * All outstanding txcmplq I/Os should have been aborted by
1325 * the targets. Unfortunately, some targets do not abide by
1326 * this forcing the driver to double check.
1327 */
1328 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1329 if (cnt)
1330 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1331 0, 0, LPFC_CTX_HOST);
1332 loopcnt = 0;
1333 while(cnt) {
1334 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1335
1336 if (++loopcnt
1337 > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1338 break;
1339
1340 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1341 }
1342
1343 if (cnt) {
1344 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1345 "0715 Bus Reset I/O flush failure: "
1346 "cnt x%x left x%x\n", cnt, i);
1347 ret = FAILED;
1348 }
1349
1350 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1351 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1352 out:
1353 return ret;
1354 }
1355
1356 static int
1357 lpfc_slave_alloc(struct scsi_device *sdev)
1358 {
1359 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1360 struct lpfc_hba *phba = vport->phba;
1361 struct lpfc_scsi_buf *scsi_buf = NULL;
1362 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1363 uint32_t total = 0, i;
1364 uint32_t num_to_alloc = 0;
1365 unsigned long flags;
1366
1367 if (!rport || fc_remote_port_chkready(rport))
1368 return -ENXIO;
1369
1370 sdev->hostdata = rport->dd_data;
1371
1372 /*
1373 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1374 * available list of scsi buffers. Don't allocate more than the
1375 * HBA limit conveyed to the midlayer via the host structure. The
1376 * formula accounts for the lun_queue_depth + error handlers + 1
1377 * extra. This list of scsi bufs exists for the lifetime of the driver.
1378 */
1379 total = phba->total_scsi_bufs;
1380 num_to_alloc = vport->cfg_lun_queue_depth + 2;
1381
1382 /* Allow some exchanges to be available always to complete discovery */
1383 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1384 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1385 "0704 At limitation of %d preallocated "
1386 "command buffers\n", total);
1387 return 0;
1388 /* Allow some exchanges to be available always to complete discovery */
1389 } else if (total + num_to_alloc >
1390 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1391 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1392 "0705 Allocation request of %d "
1393 "command buffers will exceed max of %d. "
1394 "Reducing allocation request to %d.\n",
1395 num_to_alloc, phba->cfg_hba_queue_depth,
1396 (phba->cfg_hba_queue_depth - total));
1397 num_to_alloc = phba->cfg_hba_queue_depth - total;
1398 }
1399
1400 for (i = 0; i < num_to_alloc; i++) {
1401 scsi_buf = lpfc_new_scsi_buf(vport);
1402 if (!scsi_buf) {
1403 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1404 "0706 Failed to allocate "
1405 "command buffer\n");
1406 break;
1407 }
1408
1409 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1410 phba->total_scsi_bufs++;
1411 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1412 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1413 }
1414 return 0;
1415 }
1416
1417 static int
1418 lpfc_slave_configure(struct scsi_device *sdev)
1419 {
1420 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1421 struct lpfc_hba *phba = vport->phba;
1422 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1423
1424 if (sdev->tagged_supported)
1425 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1426 else
1427 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1428
1429 /*
1430 * Initialize the fc transport attributes for the target
1431 * containing this scsi device. Also note that the driver's
1432 * target pointer is stored in the starget_data for the
1433 * driver's sysfs entry point functions.
1434 */
1435 rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1436
1437 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1438 lpfc_sli_poll_fcp_ring(phba);
1439 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1440 lpfc_poll_rearm_timer(phba);
1441 }
1442
1443 return 0;
1444 }
1445
1446 static void
1447 lpfc_slave_destroy(struct scsi_device *sdev)
1448 {
1449 sdev->hostdata = NULL;
1450 return;
1451 }
1452
1453
1454 struct scsi_host_template lpfc_template = {
1455 .module = THIS_MODULE,
1456 .name = LPFC_DRIVER_NAME,
1457 .info = lpfc_info,
1458 .queuecommand = lpfc_queuecommand,
1459 .eh_abort_handler = lpfc_abort_handler,
1460 .eh_device_reset_handler= lpfc_device_reset_handler,
1461 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1462 .slave_alloc = lpfc_slave_alloc,
1463 .slave_configure = lpfc_slave_configure,
1464 .slave_destroy = lpfc_slave_destroy,
1465 .scan_finished = lpfc_scan_finished,
1466 .this_id = -1,
1467 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
1468 .cmd_per_lun = LPFC_CMD_PER_LUN,
1469 .use_clustering = ENABLE_CLUSTERING,
1470 .shost_attrs = lpfc_hba_attrs,
1471 .max_sectors = 0xFFFF,
1472 };
1473
1474 struct scsi_host_template lpfc_vport_template = {
1475 .module = THIS_MODULE,
1476 .name = LPFC_DRIVER_NAME,
1477 .info = lpfc_info,
1478 .queuecommand = lpfc_queuecommand,
1479 .eh_abort_handler = lpfc_abort_handler,
1480 .eh_device_reset_handler= lpfc_device_reset_handler,
1481 .eh_bus_reset_handler = lpfc_bus_reset_handler,
1482 .slave_alloc = lpfc_slave_alloc,
1483 .slave_configure = lpfc_slave_configure,
1484 .slave_destroy = lpfc_slave_destroy,
1485 .scan_finished = lpfc_scan_finished,
1486 .this_id = -1,
1487 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
1488 .cmd_per_lun = LPFC_CMD_PER_LUN,
1489 .use_clustering = ENABLE_CLUSTERING,
1490 .shost_attrs = lpfc_vport_attrs,
1491 .max_sectors = 0xFFFF,
1492 };
Linux 2.6 libata-dev (mirror)