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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / scsi / lpfc / lpfc_scsi.c
blob7dc4c2e6bed2bbc6ba625be3cf60a32bc83ed291
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2006 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
25 #include <scsi/scsi.h>
26 #include <scsi/scsi_device.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_tcq.h>
29 #include <scsi/scsi_transport_fc.h>
30
31 #include "lpfc_version.h"
32 #include "lpfc_hw.h"
33 #include "lpfc_sli.h"
34 #include "lpfc_disc.h"
35 #include "lpfc_scsi.h"
36 #include "lpfc.h"
37 #include "lpfc_logmsg.h"
38 #include "lpfc_crtn.h"
39
40 #define LPFC_RESET_WAIT 2
41 #define LPFC_ABORT_WAIT 2
42
43
44 static inline void
45 lpfc_block_requests(struct lpfc_hba * phba)
46 {
47 down(&phba->hba_can_block);
48 scsi_block_requests(phba->host);
49 }
50
51 static inline void
52 lpfc_unblock_requests(struct lpfc_hba * phba)
53 {
54 scsi_unblock_requests(phba->host);
55 up(&phba->hba_can_block);
56 }
57
58 /*
59 * This routine allocates a scsi buffer, which contains all the necessary
60 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
61 * contains information to build the IOCB. The DMAable region contains
62 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
63 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
64 * and the BPL BDE is setup in the IOCB.
65 */
66 static struct lpfc_scsi_buf *
67 lpfc_new_scsi_buf(struct lpfc_hba * phba)
68 {
69 struct lpfc_scsi_buf *psb;
70 struct ulp_bde64 *bpl;
71 IOCB_t *iocb;
72 dma_addr_t pdma_phys;
73 uint16_t iotag;
74
75 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
76 if (!psb)
77 return NULL;
78 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
79 psb->scsi_hba = phba;
80
81 /*
82 * Get memory from the pci pool to map the virt space to pci bus space
83 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
84 * struct fcp_rsp and the number of bde's necessary to support the
85 * sg_tablesize.
86 */
87 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
88 &psb->dma_handle);
89 if (!psb->data) {
90 kfree(psb);
91 return NULL;
92 }
93
94 /* Initialize virtual ptrs to dma_buf region. */
95 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
96
97 /* Allocate iotag for psb->cur_iocbq. */
98 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
99 if (iotag == 0) {
100 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
101 psb->data, psb->dma_handle);
102 kfree (psb);
103 return NULL;
104 }
105 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
106
107 psb->fcp_cmnd = psb->data;
108 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
109 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
110 sizeof(struct fcp_rsp);
111
112 /* Initialize local short-hand pointers. */
113 bpl = psb->fcp_bpl;
114 pdma_phys = psb->dma_handle;
115
116 /*
117 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
118 * list bdes. Initialize the first two and leave the rest for
119 * queuecommand.
120 */
121 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
122 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
123 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
124 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
125 bpl->tus.w = le32_to_cpu(bpl->tus.w);
126 bpl++;
127
128 /* Setup the physical region for the FCP RSP */
129 pdma_phys += sizeof (struct fcp_cmnd);
130 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
131 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
132 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
133 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
134 bpl->tus.w = le32_to_cpu(bpl->tus.w);
135
136 /*
137 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
138 * initialize it with all known data now.
139 */
140 pdma_phys += (sizeof (struct fcp_rsp));
141 iocb = &psb->cur_iocbq.iocb;
142 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
143 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
144 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
145 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
146 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
147 iocb->ulpBdeCount = 1;
148 iocb->ulpClass = CLASS3;
149
150 return psb;
151 }
152
153 static struct lpfc_scsi_buf*
154 lpfc_get_scsi_buf(struct lpfc_hba * phba)
155 {
156 struct lpfc_scsi_buf * lpfc_cmd = NULL;
157 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
158 unsigned long iflag = 0;
159
160 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
161 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
162 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
163 return lpfc_cmd;
164 }
165
166 static void
167 lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
168 {
169 unsigned long iflag = 0;
170 /*
171 * There are only two special cases to consider. (1) the scsi command
172 * requested scatter-gather usage or (2) the scsi command allocated
173 * a request buffer, but did not request use_sg. There is a third
174 * case, but it does not require resource deallocation.
175 */
176 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
177 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
178 psb->seg_cnt, psb->pCmd->sc_data_direction);
179 } else {
180 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
181 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
182 psb->pCmd->request_bufflen,
183 psb->pCmd->sc_data_direction);
184 }
185 }
186
187 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
188 psb->pCmd = NULL;
189 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
190 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
191 }
192
193 static int
194 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
195 {
196 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
197 struct scatterlist *sgel = NULL;
198 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
199 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
200 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
201 dma_addr_t physaddr;
202 uint32_t i, num_bde = 0;
203 int datadir = scsi_cmnd->sc_data_direction;
204 int dma_error;
205
206 /*
207 * There are three possibilities here - use scatter-gather segment, use
208 * the single mapping, or neither. Start the lpfc command prep by
209 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
210 * data bde entry.
211 */
212 bpl += 2;
213 if (scsi_cmnd->use_sg) {
214 /*
215 * The driver stores the segment count returned from pci_map_sg
216 * because this a count of dma-mappings used to map the use_sg
217 * pages. They are not guaranteed to be the same for those
218 * architectures that implement an IOMMU.
219 */
220 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
221 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
222 scsi_cmnd->use_sg, datadir);
223 if (lpfc_cmd->seg_cnt == 0)
224 return 1;
225
226 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
227 printk(KERN_ERR "%s: Too many sg segments from "
228 "dma_map_sg. Config %d, seg_cnt %d",
229 __FUNCTION__, phba->cfg_sg_seg_cnt,
230 lpfc_cmd->seg_cnt);
231 dma_unmap_sg(&phba->pcidev->dev, sgel,
232 lpfc_cmd->seg_cnt, datadir);
233 return 1;
234 }
235
236 /*
237 * The driver established a maximum scatter-gather segment count
238 * during probe that limits the number of sg elements in any
239 * single scsi command. Just run through the seg_cnt and format
240 * the bde's.
241 */
242 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
243 physaddr = sg_dma_address(sgel);
244 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
245 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
246 bpl->tus.f.bdeSize = sg_dma_len(sgel);
247 if (datadir == DMA_TO_DEVICE)
248 bpl->tus.f.bdeFlags = 0;
249 else
250 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
251 bpl->tus.w = le32_to_cpu(bpl->tus.w);
252 bpl++;
253 sgel++;
254 num_bde++;
255 }
256 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
257 physaddr = dma_map_single(&phba->pcidev->dev,
258 scsi_cmnd->request_buffer,
259 scsi_cmnd->request_bufflen,
260 datadir);
261 dma_error = dma_mapping_error(physaddr);
262 if (dma_error) {
263 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
264 "%d:0718 Unable to dma_map_single "
265 "request_buffer: x%x\n",
266 phba->brd_no, dma_error);
267 return 1;
268 }
269
270 lpfc_cmd->nonsg_phys = physaddr;
271 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
272 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
273 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
274 if (datadir == DMA_TO_DEVICE)
275 bpl->tus.f.bdeFlags = 0;
276 else
277 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
278 bpl->tus.w = le32_to_cpu(bpl->tus.w);
279 num_bde = 1;
280 bpl++;
281 }
282
283 /*
284 * Finish initializing those IOCB fields that are dependent on the
285 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
286 * reinitialized since all iocb memory resources are used many times
287 * for transmit, receive, and continuation bpl's.
288 */
289 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
290 iocb_cmd->un.fcpi64.bdl.bdeSize +=
291 (num_bde * sizeof (struct ulp_bde64));
292 iocb_cmd->ulpBdeCount = 1;
293 iocb_cmd->ulpLe = 1;
294 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
295 return 0;
296 }
297
298 static void
299 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
300 {
301 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
302 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
303 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
304 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
305 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
306 uint32_t resp_info = fcprsp->rspStatus2;
307 uint32_t scsi_status = fcprsp->rspStatus3;
308 uint32_t host_status = DID_OK;
309 uint32_t rsplen = 0;
310
311 /*
312 * If this is a task management command, there is no
313 * scsi packet associated with this lpfc_cmd. The driver
314 * consumes it.
315 */
316 if (fcpcmd->fcpCntl2) {
317 scsi_status = 0;
318 goto out;
319 }
320
321 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
322 "%d:0730 FCP command failed: RSP "
323 "Data: x%x x%x x%x x%x x%x x%x\n",
324 phba->brd_no, resp_info, scsi_status,
325 be32_to_cpu(fcprsp->rspResId),
326 be32_to_cpu(fcprsp->rspSnsLen),
327 be32_to_cpu(fcprsp->rspRspLen),
328 fcprsp->rspInfo3);
329
330 if (resp_info & RSP_LEN_VALID) {
331 rsplen = be32_to_cpu(fcprsp->rspRspLen);
332 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
333 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
334 host_status = DID_ERROR;
335 goto out;
336 }
337 }
338
339 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
340 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
341 if (snslen > SCSI_SENSE_BUFFERSIZE)
342 snslen = SCSI_SENSE_BUFFERSIZE;
343
344 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
345 }
346
347 cmnd->resid = 0;
348 if (resp_info & RESID_UNDER) {
349 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
350
351 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
352 "%d:0716 FCP Read Underrun, expected %d, "
353 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
354 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
355 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
356
357 /*
358 * The cmnd->underflow is the minimum number of bytes that must
359 * be transfered for this command. Provided a sense condition
360 * is not present, make sure the actual amount transferred is at
361 * least the underflow value or fail.
362 */
363 if (!(resp_info & SNS_LEN_VALID) &&
364 (scsi_status == SAM_STAT_GOOD) &&
365 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
366 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
367 "%d:0717 FCP command x%x residual "
368 "underrun converted to error "
369 "Data: x%x x%x x%x\n", phba->brd_no,
370 cmnd->cmnd[0], cmnd->request_bufflen,
371 cmnd->resid, cmnd->underflow);
372
373 host_status = DID_ERROR;
374 }
375 } else if (resp_info & RESID_OVER) {
376 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
377 "%d:0720 FCP command x%x residual "
378 "overrun error. Data: x%x x%x \n",
379 phba->brd_no, cmnd->cmnd[0],
380 cmnd->request_bufflen, cmnd->resid);
381 host_status = DID_ERROR;
382
383 /*
384 * Check SLI validation that all the transfer was actually done
385 * (fcpi_parm should be zero). Apply check only to reads.
386 */
387 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
388 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
389 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
390 "%d:0734 FCP Read Check Error Data: "
391 "x%x x%x x%x x%x\n", phba->brd_no,
392 be32_to_cpu(fcpcmd->fcpDl),
393 be32_to_cpu(fcprsp->rspResId),
394 fcpi_parm, cmnd->cmnd[0]);
395 host_status = DID_ERROR;
396 cmnd->resid = cmnd->request_bufflen;
397 }
398
399 out:
400 cmnd->result = ScsiResult(host_status, scsi_status);
401 }
402
403 static void
404 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
405 struct lpfc_iocbq *pIocbOut)
406 {
407 struct lpfc_scsi_buf *lpfc_cmd =
408 (struct lpfc_scsi_buf *) pIocbIn->context1;
409 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
410 struct lpfc_nodelist *pnode = rdata->pnode;
411 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
412 int result;
413 struct scsi_device *sdev, *tmp_sdev;
414 int depth = 0;
415
416 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
417 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
418
419 if (lpfc_cmd->status) {
420 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
421 (lpfc_cmd->result & IOERR_DRVR_MASK))
422 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
423 else if (lpfc_cmd->status >= IOSTAT_CNT)
424 lpfc_cmd->status = IOSTAT_DEFAULT;
425
426 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
427 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
428 "x%x result: x%x Data: x%x x%x\n",
429 phba->brd_no, cmd->cmnd[0], cmd->device->id,
430 cmd->device->lun, lpfc_cmd->status,
431 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
432 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
433
434 switch (lpfc_cmd->status) {
435 case IOSTAT_FCP_RSP_ERROR:
436 /* Call FCP RSP handler to determine result */
437 lpfc_handle_fcp_err(lpfc_cmd);
438 break;
439 case IOSTAT_NPORT_BSY:
440 case IOSTAT_FABRIC_BSY:
441 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
442 break;
443 default:
444 cmd->result = ScsiResult(DID_ERROR, 0);
445 break;
446 }
447
448 if ((pnode == NULL )
449 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
450 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
451 } else {
452 cmd->result = ScsiResult(DID_OK, 0);
453 }
454
455 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
456 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
457
458 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
459 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
460 "SNS x%x x%x Data: x%x x%x\n",
461 phba->brd_no, cmd->device->id,
462 cmd->device->lun, cmd, cmd->result,
463 *lp, *(lp + 3), cmd->retries, cmd->resid);
464 }
465
466 result = cmd->result;
467 sdev = cmd->device;
468 cmd->scsi_done(cmd);
469
470 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
471 lpfc_release_scsi_buf(phba, lpfc_cmd);
472 return;
473 }
474
475 if (!result && pnode != NULL &&
476 ((jiffies - pnode->last_ramp_up_time) >
477 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
478 ((jiffies - pnode->last_q_full_time) >
479 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
480 (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
481 shost_for_each_device(tmp_sdev, sdev->host) {
482 if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
483 if (tmp_sdev->id != sdev->id)
484 continue;
485 if (tmp_sdev->ordered_tags)
486 scsi_adjust_queue_depth(tmp_sdev,
487 MSG_ORDERED_TAG,
488 tmp_sdev->queue_depth+1);
489 else
490 scsi_adjust_queue_depth(tmp_sdev,
491 MSG_SIMPLE_TAG,
492 tmp_sdev->queue_depth+1);
493
494 pnode->last_ramp_up_time = jiffies;
495 }
496 }
497 }
498
499 /*
500 * Check for queue full. If the lun is reporting queue full, then
501 * back off the lun queue depth to prevent target overloads.
502 */
503 if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
504 pnode->last_q_full_time = jiffies;
505
506 shost_for_each_device(tmp_sdev, sdev->host) {
507 if (tmp_sdev->id != sdev->id)
508 continue;
509 depth = scsi_track_queue_full(tmp_sdev,
510 tmp_sdev->queue_depth - 1);
511 }
512 /*
513 * The queue depth cannot be lowered any more.
514 * Modify the returned error code to store
515 * the final depth value set by
516 * scsi_track_queue_full.
517 */
518 if (depth == -1)
519 depth = sdev->host->cmd_per_lun;
520
521 if (depth) {
522 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
523 "%d:0711 detected queue full - lun queue depth "
524 " adjusted to %d.\n", phba->brd_no, depth);
525 }
526 }
527
528 lpfc_release_scsi_buf(phba, lpfc_cmd);
529 }
530
531 static void
532 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
533 struct lpfc_nodelist *pnode)
534 {
535 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
536 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
537 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
538 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
539 int datadir = scsi_cmnd->sc_data_direction;
540
541 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
542 /* clear task management bits */
543 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
544
545 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
546 &lpfc_cmd->fcp_cmnd->fcp_lun);
547
548 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
549
550 if (scsi_cmnd->device->tagged_supported) {
551 switch (scsi_cmnd->tag) {
552 case HEAD_OF_QUEUE_TAG:
553 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
554 break;
555 case ORDERED_QUEUE_TAG:
556 fcp_cmnd->fcpCntl1 = ORDERED_Q;
557 break;
558 default:
559 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
560 break;
561 }
562 } else
563 fcp_cmnd->fcpCntl1 = 0;
564
565 /*
566 * There are three possibilities here - use scatter-gather segment, use
567 * the single mapping, or neither. Start the lpfc command prep by
568 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
569 * data bde entry.
570 */
571 if (scsi_cmnd->use_sg) {
572 if (datadir == DMA_TO_DEVICE) {
573 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
574 iocb_cmd->un.fcpi.fcpi_parm = 0;
575 iocb_cmd->ulpPU = 0;
576 fcp_cmnd->fcpCntl3 = WRITE_DATA;
577 phba->fc4OutputRequests++;
578 } else {
579 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
580 iocb_cmd->ulpPU = PARM_READ_CHECK;
581 iocb_cmd->un.fcpi.fcpi_parm =
582 scsi_cmnd->request_bufflen;
583 fcp_cmnd->fcpCntl3 = READ_DATA;
584 phba->fc4InputRequests++;
585 }
586 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
587 if (datadir == DMA_TO_DEVICE) {
588 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
589 iocb_cmd->un.fcpi.fcpi_parm = 0;
590 iocb_cmd->ulpPU = 0;
591 fcp_cmnd->fcpCntl3 = WRITE_DATA;
592 phba->fc4OutputRequests++;
593 } else {
594 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
595 iocb_cmd->ulpPU = PARM_READ_CHECK;
596 iocb_cmd->un.fcpi.fcpi_parm =
597 scsi_cmnd->request_bufflen;
598 fcp_cmnd->fcpCntl3 = READ_DATA;
599 phba->fc4InputRequests++;
600 }
601 } else {
602 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
603 iocb_cmd->un.fcpi.fcpi_parm = 0;
604 iocb_cmd->ulpPU = 0;
605 fcp_cmnd->fcpCntl3 = 0;
606 phba->fc4ControlRequests++;
607 }
608
609 /*
610 * Finish initializing those IOCB fields that are independent
611 * of the scsi_cmnd request_buffer
612 */
613 piocbq->iocb.ulpContext = pnode->nlp_rpi;
614 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
615 piocbq->iocb.ulpFCP2Rcvy = 1;
616
617 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
618 piocbq->context1 = lpfc_cmd;
619 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
620 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
621 }
622
623 static int
624 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
625 struct lpfc_scsi_buf *lpfc_cmd,
626 uint8_t task_mgmt_cmd)
627 {
628 struct lpfc_sli *psli;
629 struct lpfc_iocbq *piocbq;
630 IOCB_t *piocb;
631 struct fcp_cmnd *fcp_cmnd;
632 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
633 struct lpfc_nodelist *ndlp = rdata->pnode;
634
635 if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
636 return 0;
637 }
638
639 psli = &phba->sli;
640 piocbq = &(lpfc_cmd->cur_iocbq);
641 piocb = &piocbq->iocb;
642
643 fcp_cmnd = lpfc_cmd->fcp_cmnd;
644 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
645 &lpfc_cmd->fcp_cmnd->fcp_lun);
646 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
647
648 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
649
650 piocb->ulpContext = ndlp->nlp_rpi;
651 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
652 piocb->ulpFCP2Rcvy = 1;
653 }
654 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
655
656 /* ulpTimeout is only one byte */
657 if (lpfc_cmd->timeout > 0xff) {
658 /*
659 * Do not timeout the command at the firmware level.
660 * The driver will provide the timeout mechanism.
661 */
662 piocb->ulpTimeout = 0;
663 } else {
664 piocb->ulpTimeout = lpfc_cmd->timeout;
665 }
666
667 return (1);
668 }
669
670 static int
671 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
672 unsigned tgt_id, struct lpfc_rport_data *rdata)
673 {
674 struct lpfc_iocbq *iocbq;
675 struct lpfc_iocbq *iocbqrsp;
676 int ret;
677
678 lpfc_cmd->rdata = rdata;
679 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
680 if (!ret)
681 return FAILED;
682
683 lpfc_cmd->scsi_hba = phba;
684 iocbq = &lpfc_cmd->cur_iocbq;
685 iocbqrsp = lpfc_sli_get_iocbq(phba);
686
687 if (!iocbqrsp)
688 return FAILED;
689
690 /* Issue Target Reset to TGT <num> */
691 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
692 "%d:0702 Issue Target Reset to TGT %d "
693 "Data: x%x x%x\n",
694 phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
695 rdata->pnode->nlp_flag);
696
697 ret = lpfc_sli_issue_iocb_wait(phba,
698 &phba->sli.ring[phba->sli.fcp_ring],
699 iocbq, iocbqrsp, lpfc_cmd->timeout);
700 if (ret != IOCB_SUCCESS) {
701 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
702 ret = FAILED;
703 } else {
704 ret = SUCCESS;
705 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
706 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
707 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
708 (lpfc_cmd->result & IOERR_DRVR_MASK))
709 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
710 }
711
712 lpfc_sli_release_iocbq(phba, iocbqrsp);
713 return ret;
714 }
715
716 const char *
717 lpfc_info(struct Scsi_Host *host)
718 {
719 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata;
720 int len;
721 static char lpfcinfobuf[384];
722
723 memset(lpfcinfobuf,0,384);
724 if (phba && phba->pcidev){
725 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
726 len = strlen(lpfcinfobuf);
727 snprintf(lpfcinfobuf + len,
728 384-len,
729 " on PCI bus %02x device %02x irq %d",
730 phba->pcidev->bus->number,
731 phba->pcidev->devfn,
732 phba->pcidev->irq);
733 len = strlen(lpfcinfobuf);
734 if (phba->Port[0]) {
735 snprintf(lpfcinfobuf + len,
736 384-len,
737 " port %s",
738 phba->Port);
739 }
740 }
741 return lpfcinfobuf;
742 }
743
744 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
745 {
746 unsigned long poll_tmo_expires =
747 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
748
749 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
750 mod_timer(&phba->fcp_poll_timer,
751 poll_tmo_expires);
752 }
753
754 void lpfc_poll_start_timer(struct lpfc_hba * phba)
755 {
756 lpfc_poll_rearm_timer(phba);
757 }
758
759 void lpfc_poll_timeout(unsigned long ptr)
760 {
761 struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
762 unsigned long iflag;
763
764 spin_lock_irqsave(phba->host->host_lock, iflag);
765
766 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
767 lpfc_sli_poll_fcp_ring (phba);
768 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
769 lpfc_poll_rearm_timer(phba);
770 }
771
772 spin_unlock_irqrestore(phba->host->host_lock, iflag);
773 }
774
775 static int
776 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
777 {
778 struct lpfc_hba *phba =
779 (struct lpfc_hba *) cmnd->device->host->hostdata;
780 struct lpfc_sli *psli = &phba->sli;
781 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
782 struct lpfc_nodelist *ndlp = rdata->pnode;
783 struct lpfc_scsi_buf *lpfc_cmd;
784 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
785 int err;
786
787 err = fc_remote_port_chkready(rport);
788 if (err) {
789 cmnd->result = err;
790 goto out_fail_command;
791 }
792
793 /*
794 * Catch race where our node has transitioned, but the
795 * transport is still transitioning.
796 */
797 if (!ndlp) {
798 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
799 goto out_fail_command;
800 }
801 lpfc_cmd = lpfc_get_scsi_buf (phba);
802 if (lpfc_cmd == NULL) {
803 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
804 "%d:0707 driver's buffer pool is empty, "
805 "IO busied\n", phba->brd_no);
806 goto out_host_busy;
807 }
808
809 /*
810 * Store the midlayer's command structure for the completion phase
811 * and complete the command initialization.
812 */
813 lpfc_cmd->pCmd = cmnd;
814 lpfc_cmd->rdata = rdata;
815 lpfc_cmd->timeout = 0;
816 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
817 cmnd->scsi_done = done;
818
819 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
820 if (err)
821 goto out_host_busy_free_buf;
822
823 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
824
825 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
826 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
827 if (err)
828 goto out_host_busy_free_buf;
829
830 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
831 lpfc_sli_poll_fcp_ring(phba);
832 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
833 lpfc_poll_rearm_timer(phba);
834 }
835
836 return 0;
837
838 out_host_busy_free_buf:
839 lpfc_release_scsi_buf(phba, lpfc_cmd);
840 out_host_busy:
841 return SCSI_MLQUEUE_HOST_BUSY;
842
843 out_fail_command:
844 done(cmnd);
845 return 0;
846 }
847
848
849 static int
850 lpfc_abort_handler(struct scsi_cmnd *cmnd)
851 {
852 struct Scsi_Host *shost = cmnd->device->host;
853 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
854 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
855 struct lpfc_iocbq *iocb;
856 struct lpfc_iocbq *abtsiocb;
857 struct lpfc_scsi_buf *lpfc_cmd;
858 IOCB_t *cmd, *icmd;
859 unsigned int loop_count = 0;
860 int ret = SUCCESS;
861
862 lpfc_block_requests(phba);
863 spin_lock_irq(shost->host_lock);
864
865 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
866 BUG_ON(!lpfc_cmd);
867
868 /*
869 * If pCmd field of the corresponding lpfc_scsi_buf structure
870 * points to a different SCSI command, then the driver has
871 * already completed this command, but the midlayer did not
872 * see the completion before the eh fired. Just return
873 * SUCCESS.
874 */
875 iocb = &lpfc_cmd->cur_iocbq;
876 if (lpfc_cmd->pCmd != cmnd)
877 goto out;
878
879 BUG_ON(iocb->context1 != lpfc_cmd);
880
881 abtsiocb = lpfc_sli_get_iocbq(phba);
882 if (abtsiocb == NULL) {
883 ret = FAILED;
884 goto out;
885 }
886
887 /*
888 * The scsi command can not be in txq and it is in flight because the
889 * pCmd is still pointig at the SCSI command we have to abort. There
890 * is no need to search the txcmplq. Just send an abort to the FW.
891 */
892
893 cmd = &iocb->iocb;
894 icmd = &abtsiocb->iocb;
895 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
896 icmd->un.acxri.abortContextTag = cmd->ulpContext;
897 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
898
899 icmd->ulpLe = 1;
900 icmd->ulpClass = cmd->ulpClass;
901 if (phba->hba_state >= LPFC_LINK_UP)
902 icmd->ulpCommand = CMD_ABORT_XRI_CN;
903 else
904 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
905
906 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
907 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
908 lpfc_sli_release_iocbq(phba, abtsiocb);
909 ret = FAILED;
910 goto out;
911 }
912
913 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
914 lpfc_sli_poll_fcp_ring (phba);
915
916 /* Wait for abort to complete */
917 while (lpfc_cmd->pCmd == cmnd)
918 {
919 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
920 lpfc_sli_poll_fcp_ring (phba);
921
922 spin_unlock_irq(phba->host->host_lock);
923 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
924 spin_lock_irq(phba->host->host_lock);
925 if (++loop_count
926 > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
927 break;
928 }
929
930 if (lpfc_cmd->pCmd == cmnd) {
931 ret = FAILED;
932 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
933 "%d:0748 abort handler timed out waiting for "
934 "abort to complete: ret %#x, ID %d, LUN %d, "
935 "snum %#lx\n",
936 phba->brd_no, ret, cmnd->device->id,
937 cmnd->device->lun, cmnd->serial_number);
938 }
939
940 out:
941 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
942 "%d:0749 SCSI Layer I/O Abort Request "
943 "Status x%x ID %d LUN %d snum %#lx\n",
944 phba->brd_no, ret, cmnd->device->id,
945 cmnd->device->lun, cmnd->serial_number);
946
947 spin_unlock_irq(shost->host_lock);
948 lpfc_unblock_requests(phba);
949
950 return ret;
951 }
952
953 static int
954 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
955 {
956 struct Scsi_Host *shost = cmnd->device->host;
957 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
958 struct lpfc_scsi_buf *lpfc_cmd;
959 struct lpfc_iocbq *iocbq, *iocbqrsp;
960 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
961 struct lpfc_nodelist *pnode = rdata->pnode;
962 uint32_t cmd_result = 0, cmd_status = 0;
963 int ret = FAILED;
964 int cnt, loopcnt;
965
966 lpfc_block_requests(phba);
967 spin_lock_irq(shost->host_lock);
968 /*
969 * If target is not in a MAPPED state, delay the reset until
970 * target is rediscovered or nodev timeout expires.
971 */
972 while ( 1 ) {
973 if (!pnode)
974 break;
975
976 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
977 spin_unlock_irq(phba->host->host_lock);
978 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
979 spin_lock_irq(phba->host->host_lock);
980 }
981 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
982 break;
983 }
984
985 lpfc_cmd = lpfc_get_scsi_buf (phba);
986 if (lpfc_cmd == NULL)
987 goto out;
988
989 lpfc_cmd->pCmd = cmnd;
990 lpfc_cmd->timeout = 60;
991 lpfc_cmd->scsi_hba = phba;
992 lpfc_cmd->rdata = rdata;
993
994 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
995 if (!ret)
996 goto out_free_scsi_buf;
997
998 iocbq = &lpfc_cmd->cur_iocbq;
999
1000 /* get a buffer for this IOCB command response */
1001 iocbqrsp = lpfc_sli_get_iocbq(phba);
1002 if (iocbqrsp == NULL)
1003 goto out_free_scsi_buf;
1004
1005 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1006 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
1007 "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
1008 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1009
1010 ret = lpfc_sli_issue_iocb_wait(phba,
1011 &phba->sli.ring[phba->sli.fcp_ring],
1012 iocbq, iocbqrsp, lpfc_cmd->timeout);
1013 if (ret == IOCB_SUCCESS)
1014 ret = SUCCESS;
1015
1016
1017 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1018 cmd_status = iocbqrsp->iocb.ulpStatus;
1019
1020 lpfc_sli_release_iocbq(phba, iocbqrsp);
1021 lpfc_release_scsi_buf(phba, lpfc_cmd);
1022
1023 /*
1024 * All outstanding txcmplq I/Os should have been aborted by the device.
1025 * Unfortunately, some targets do not abide by this forcing the driver
1026 * to double check.
1027 */
1028 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1029 cmnd->device->id, cmnd->device->lun,
1030 LPFC_CTX_LUN);
1031 if (cnt)
1032 lpfc_sli_abort_iocb(phba,
1033 &phba->sli.ring[phba->sli.fcp_ring],
1034 cmnd->device->id, cmnd->device->lun,
1035 0, LPFC_CTX_LUN);
1036 loopcnt = 0;
1037 while(cnt) {
1038 spin_unlock_irq(phba->host->host_lock);
1039 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1040 spin_lock_irq(phba->host->host_lock);
1041
1042 if (++loopcnt
1043 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1044 break;
1045
1046 cnt = lpfc_sli_sum_iocb(phba,
1047 &phba->sli.ring[phba->sli.fcp_ring],
1048 cmnd->device->id, cmnd->device->lun,
1049 LPFC_CTX_LUN);
1050 }
1051
1052 if (cnt) {
1053 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1054 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1055 phba->brd_no, cnt);
1056 ret = FAILED;
1057 }
1058
1059 out_free_scsi_buf:
1060 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1061 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1062 "Data: x%x x%x x%x\n",
1063 phba->brd_no, cmnd->device->id,cmnd->device->lun,
1064 ret, cmd_status, cmd_result);
1065
1066 out:
1067 spin_unlock_irq(shost->host_lock);
1068 lpfc_unblock_requests(phba);
1069 return ret;
1070 }
1071
1072 static int
1073 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1074 {
1075 struct Scsi_Host *shost = cmnd->device->host;
1076 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
1077 struct lpfc_nodelist *ndlp = NULL;
1078 int match;
1079 int ret = FAILED, i, err_count = 0;
1080 int cnt, loopcnt;
1081 struct lpfc_scsi_buf * lpfc_cmd;
1082
1083 lpfc_block_requests(phba);
1084 spin_lock_irq(shost->host_lock);
1085
1086 lpfc_cmd = lpfc_get_scsi_buf(phba);
1087 if (lpfc_cmd == NULL)
1088 goto out;
1089
1090 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1091 lpfc_cmd->timeout = 60;
1092 lpfc_cmd->pCmd = cmnd;
1093 lpfc_cmd->scsi_hba = phba;
1094
1095 /*
1096 * Since the driver manages a single bus device, reset all
1097 * targets known to the driver. Should any target reset
1098 * fail, this routine returns failure to the midlayer.
1099 */
1100 for (i = 0; i < MAX_FCP_TARGET; i++) {
1101 /* Search the mapped list for this target ID */
1102 match = 0;
1103 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1104 if ((i == ndlp->nlp_sid) && ndlp->rport) {
1105 match = 1;
1106 break;
1107 }
1108 }
1109 if (!match)
1110 continue;
1111
1112 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba,
1113 i, ndlp->rport->dd_data);
1114 if (ret != SUCCESS) {
1115 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1116 "%d:0713 Bus Reset on target %d failed\n",
1117 phba->brd_no, i);
1118 err_count++;
1119 }
1120 }
1121
1122 if (err_count == 0)
1123 ret = SUCCESS;
1124
1125 lpfc_release_scsi_buf(phba, lpfc_cmd);
1126
1127 /*
1128 * All outstanding txcmplq I/Os should have been aborted by
1129 * the targets. Unfortunately, some targets do not abide by
1130 * this forcing the driver to double check.
1131 */
1132 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1133 0, 0, LPFC_CTX_HOST);
1134 if (cnt)
1135 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1136 0, 0, 0, LPFC_CTX_HOST);
1137 loopcnt = 0;
1138 while(cnt) {
1139 spin_unlock_irq(phba->host->host_lock);
1140 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1141 spin_lock_irq(phba->host->host_lock);
1142
1143 if (++loopcnt
1144 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1145 break;
1146
1147 cnt = lpfc_sli_sum_iocb(phba,
1148 &phba->sli.ring[phba->sli.fcp_ring],
1149 0, 0, LPFC_CTX_HOST);
1150 }
1151
1152 if (cnt) {
1153 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1154 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1155 phba->brd_no, cnt, i);
1156 ret = FAILED;
1157 }
1158
1159 lpfc_printf_log(phba,
1160 KERN_ERR,
1161 LOG_FCP,
1162 "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1163 phba->brd_no, ret);
1164 out:
1165 spin_unlock_irq(shost->host_lock);
1166 lpfc_unblock_requests(phba);
1167 return ret;
1168 }
1169
1170 static int
1171 lpfc_slave_alloc(struct scsi_device *sdev)
1172 {
1173 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
1174 struct lpfc_scsi_buf *scsi_buf = NULL;
1175 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1176 uint32_t total = 0, i;
1177 uint32_t num_to_alloc = 0;
1178 unsigned long flags;
1179
1180 if (!rport || fc_remote_port_chkready(rport))
1181 return -ENXIO;
1182
1183 sdev->hostdata = rport->dd_data;
1184
1185 /*
1186 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1187 * available list of scsi buffers. Don't allocate more than the
1188 * HBA limit conveyed to the midlayer via the host structure. The
1189 * formula accounts for the lun_queue_depth + error handlers + 1
1190 * extra. This list of scsi bufs exists for the lifetime of the driver.
1191 */
1192 total = phba->total_scsi_bufs;
1193 num_to_alloc = phba->cfg_lun_queue_depth + 2;
1194 if (total >= phba->cfg_hba_queue_depth) {
1195 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1196 "%d:0704 At limitation of %d preallocated "
1197 "command buffers\n", phba->brd_no, total);
1198 return 0;
1199 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1200 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1201 "%d:0705 Allocation request of %d command "
1202 "buffers will exceed max of %d. Reducing "
1203 "allocation request to %d.\n", phba->brd_no,
1204 num_to_alloc, phba->cfg_hba_queue_depth,
1205 (phba->cfg_hba_queue_depth - total));
1206 num_to_alloc = phba->cfg_hba_queue_depth - total;
1207 }
1208
1209 for (i = 0; i < num_to_alloc; i++) {
1210 scsi_buf = lpfc_new_scsi_buf(phba);
1211 if (!scsi_buf) {
1212 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1213 "%d:0706 Failed to allocate command "
1214 "buffer\n", phba->brd_no);
1215 break;
1216 }
1217
1218 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1219 phba->total_scsi_bufs++;
1220 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1221 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1222 }
1223 return 0;
1224 }
1225
1226 static int
1227 lpfc_slave_configure(struct scsi_device *sdev)
1228 {
1229 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
1230 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1231
1232 if (sdev->tagged_supported)
1233 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1234 else
1235 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1236
1237 /*
1238 * Initialize the fc transport attributes for the target
1239 * containing this scsi device. Also note that the driver's
1240 * target pointer is stored in the starget_data for the
1241 * driver's sysfs entry point functions.
1242 */
1243 rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1244
1245 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1246 lpfc_sli_poll_fcp_ring(phba);
1247 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1248 lpfc_poll_rearm_timer(phba);
1249 }
1250
1251 return 0;
1252 }
1253
1254 static void
1255 lpfc_slave_destroy(struct scsi_device *sdev)
1256 {
1257 sdev->hostdata = NULL;
1258 return;
1259 }
1260
1261 struct scsi_host_template lpfc_template = {
1262 .module = THIS_MODULE,
1263 .name = LPFC_DRIVER_NAME,
1264 .info = lpfc_info,
1265 .queuecommand = lpfc_queuecommand,
1266 .eh_abort_handler = lpfc_abort_handler,
1267 .eh_device_reset_handler= lpfc_reset_lun_handler,
1268 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1269 .slave_alloc = lpfc_slave_alloc,
1270 .slave_configure = lpfc_slave_configure,
1271 .slave_destroy = lpfc_slave_destroy,
1272 .this_id = -1,
1273 .sg_tablesize = LPFC_SG_SEG_CNT,
1274 .cmd_per_lun = LPFC_CMD_PER_LUN,
1275 .use_clustering = ENABLE_CLUSTERING,
1276 .shost_attrs = lpfc_host_attrs,
1277 .max_sectors = 0xFFFF,
1278 };
Linux with added FPC-III support