projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] lpfc: Remove $Id$ keyword strings.
[deliverable/linux.git] / drivers / scsi / lpfc / lpfc_scsi.c
CommitLineData
dea3101e 1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Enterprise Fibre Channel Host Bus Adapters. *
4 * Refer to the README file included with this package for *
5 * driver version and adapter support. *
6 * Copyright (C) 2004 Emulex Corporation. *
7 * www.emulex.com *
8 * *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of the GNU General Public License *
11 * as published by the Free Software Foundation; either version 2 *
12 * of the License, or (at your option) any later version. *
13 * *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17 * GNU General Public License for more details, a copy of which *
18 * can be found in the file COPYING included with this package. *
19 *******************************************************************/
20
dea3101e 21#include <linux/pci.h>
22#include <linux/interrupt.h>
23
24#include <scsi/scsi.h>
25#include <scsi/scsi_device.h>
26#include <scsi/scsi_host.h>
27#include <scsi/scsi_tcq.h>
28#include <scsi/scsi_transport_fc.h>
29
30#include "lpfc_version.h"
31#include "lpfc_hw.h"
32#include "lpfc_sli.h"
33#include "lpfc_disc.h"
34#include "lpfc_scsi.h"
35#include "lpfc.h"
36#include "lpfc_logmsg.h"
37#include "lpfc_crtn.h"
38
39#define LPFC_RESET_WAIT 2
40#define LPFC_ABORT_WAIT 2
41
42static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
43{
44 fcmd->fcpLunLsl = 0;
45 fcmd->fcpLunMsl = swab16((uint16_t)lun);
46}
47
48/*
49 * This routine allocates a scsi buffer, which contains all the necessary
50 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
51 * contains information to build the IOCB. The DMAable region contains
52 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
53 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
54 * and the BPL BDE is setup in the IOCB.
55 */
56static struct lpfc_scsi_buf *
57lpfc_get_scsi_buf(struct lpfc_hba * phba)
58{
59 struct lpfc_scsi_buf *psb;
60 struct ulp_bde64 *bpl;
61 IOCB_t *iocb;
62 dma_addr_t pdma_phys;
63
64 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
65 if (!psb)
66 return NULL;
67 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
68 psb->scsi_hba = phba;
69
70 /*
71 * Get memory from the pci pool to map the virt space to pci bus space
72 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
73 * struct fcp_rsp and the number of bde's necessary to support the
74 * sg_tablesize.
75 */
76 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
77 &psb->dma_handle);
78 if (!psb->data) {
79 kfree(psb);
80 return NULL;
81 }
82
83 /* Initialize virtual ptrs to dma_buf region. */
84 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
85
86 psb->fcp_cmnd = psb->data;
87 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
88 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
89 sizeof(struct fcp_rsp);
90
91 /* Initialize local short-hand pointers. */
92 bpl = psb->fcp_bpl;
93 pdma_phys = psb->dma_handle;
94
95 /*
96 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
97 * list bdes. Initialize the first two and leave the rest for
98 * queuecommand.
99 */
100 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
101 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
102 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
103 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
104 bpl->tus.w = le32_to_cpu(bpl->tus.w);
105 bpl++;
106
107 /* Setup the physical region for the FCP RSP */
108 pdma_phys += sizeof (struct fcp_cmnd);
109 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
110 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
111 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
112 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
113 bpl->tus.w = le32_to_cpu(bpl->tus.w);
114
115 /*
116 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
117 * initialize it with all known data now.
118 */
119 pdma_phys += (sizeof (struct fcp_rsp));
120 iocb = &psb->cur_iocbq.iocb;
121 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
122 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
123 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
124 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
125 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
126 iocb->ulpBdeCount = 1;
127 iocb->ulpClass = CLASS3;
128
129 return psb;
130}
131
132static void
133lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
134{
135 struct lpfc_hba *phba = psb->scsi_hba;
136
137 /*
138 * There are only two special cases to consider. (1) the scsi command
139 * requested scatter-gather usage or (2) the scsi command allocated
140 * a request buffer, but did not request use_sg. There is a third
141 * case, but it does not require resource deallocation.
142 */
143 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
144 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
145 psb->seg_cnt, psb->pCmd->sc_data_direction);
146 } else {
147 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
148 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
149 psb->pCmd->request_bufflen,
150 psb->pCmd->sc_data_direction);
151 }
152 }
153
154 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
155}
156
157static int
158lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
159{
160 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
161 struct scatterlist *sgel = NULL;
162 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
163 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
164 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
165 dma_addr_t physaddr;
166 uint32_t i, num_bde = 0;
167 int datadir = scsi_cmnd->sc_data_direction;
168 int dma_error;
169
170 /*
171 * There are three possibilities here - use scatter-gather segment, use
172 * the single mapping, or neither. Start the lpfc command prep by
173 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
174 * data bde entry.
175 */
176 bpl += 2;
177 if (scsi_cmnd->use_sg) {
178 /*
179 * The driver stores the segment count returned from pci_map_sg
180 * because this a count of dma-mappings used to map the use_sg
181 * pages. They are not guaranteed to be the same for those
182 * architectures that implement an IOMMU.
183 */
184 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
185 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
186 scsi_cmnd->use_sg, datadir);
187 if (lpfc_cmd->seg_cnt == 0)
188 return 1;
189
190 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
191 printk(KERN_ERR "%s: Too many sg segments from "
192 "dma_map_sg. Config %d, seg_cnt %d",
193 __FUNCTION__, phba->cfg_sg_seg_cnt,
194 lpfc_cmd->seg_cnt);
195 dma_unmap_sg(&phba->pcidev->dev, sgel,
196 lpfc_cmd->seg_cnt, datadir);
197 return 1;
198 }
199
200 /*
201 * The driver established a maximum scatter-gather segment count
202 * during probe that limits the number of sg elements in any
203 * single scsi command. Just run through the seg_cnt and format
204 * the bde's.
205 */
206 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
207 physaddr = sg_dma_address(sgel);
208 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
209 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
210 bpl->tus.f.bdeSize = sg_dma_len(sgel);
211 if (datadir == DMA_TO_DEVICE)
212 bpl->tus.f.bdeFlags = 0;
213 else
214 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
215 bpl->tus.w = le32_to_cpu(bpl->tus.w);
216 bpl++;
217 sgel++;
218 num_bde++;
219 }
220 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
221 physaddr = dma_map_single(&phba->pcidev->dev,
222 scsi_cmnd->request_buffer,
223 scsi_cmnd->request_bufflen,
224 datadir);
225 dma_error = dma_mapping_error(physaddr);
226 if (dma_error) {
227 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
228 "%d:0718 Unable to dma_map_single "
229 "request_buffer: x%x\n",
230 phba->brd_no, dma_error);
231 return 1;
232 }
233
234 lpfc_cmd->nonsg_phys = physaddr;
235 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
236 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
237 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
238 if (datadir == DMA_TO_DEVICE)
239 bpl->tus.f.bdeFlags = 0;
240 bpl->tus.w = le32_to_cpu(bpl->tus.w);
241 num_bde = 1;
242 bpl++;
243 }
244
245 /*
246 * Finish initializing those IOCB fields that are dependent on the
247 * scsi_cmnd request_buffer
248 */
249 iocb_cmd->un.fcpi64.bdl.bdeSize +=
250 (num_bde * sizeof (struct ulp_bde64));
251 iocb_cmd->ulpBdeCount = 1;
252 iocb_cmd->ulpLe = 1;
253 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
254 return 0;
255}
256
257static void
258lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
259{
260 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
261 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
262 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
263 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
264 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
265 uint32_t resp_info = fcprsp->rspStatus2;
266 uint32_t scsi_status = fcprsp->rspStatus3;
267 uint32_t host_status = DID_OK;
268 uint32_t rsplen = 0;
269
270 /*
271 * If this is a task management command, there is no
272 * scsi packet associated with this lpfc_cmd. The driver
273 * consumes it.
274 */
275 if (fcpcmd->fcpCntl2) {
276 scsi_status = 0;
277 goto out;
278 }
279
280 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
281 "%d:0730 FCP command failed: RSP "
282 "Data: x%x x%x x%x x%x x%x x%x\n",
283 phba->brd_no, resp_info, scsi_status,
284 be32_to_cpu(fcprsp->rspResId),
285 be32_to_cpu(fcprsp->rspSnsLen),
286 be32_to_cpu(fcprsp->rspRspLen),
287 fcprsp->rspInfo3);
288
289 if (resp_info & RSP_LEN_VALID) {
290 rsplen = be32_to_cpu(fcprsp->rspRspLen);
291 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
292 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
293 host_status = DID_ERROR;
294 goto out;
295 }
296 }
297
298 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
299 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
300 if (snslen > SCSI_SENSE_BUFFERSIZE)
301 snslen = SCSI_SENSE_BUFFERSIZE;
302
303 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
304 }
305
306 cmnd->resid = 0;
307 if (resp_info & RESID_UNDER) {
308 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
309
310 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
311 "%d:0716 FCP Read Underrun, expected %d, "
312 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
313 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
314 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
315
316 /*
317 * The cmnd->underflow is the minimum number of bytes that must
318 * be transfered for this command. Provided a sense condition
319 * is not present, make sure the actual amount transferred is at
320 * least the underflow value or fail.
321 */
322 if (!(resp_info & SNS_LEN_VALID) &&
323 (scsi_status == SAM_STAT_GOOD) &&
324 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
325 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
326 "%d:0717 FCP command x%x residual "
327 "underrun converted to error "
328 "Data: x%x x%x x%x\n", phba->brd_no,
329 cmnd->cmnd[0], cmnd->request_bufflen,
330 cmnd->resid, cmnd->underflow);
331
332 host_status = DID_ERROR;
333 }
334 } else if (resp_info & RESID_OVER) {
335 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
336 "%d:0720 FCP command x%x residual "
337 "overrun error. Data: x%x x%x \n",
338 phba->brd_no, cmnd->cmnd[0],
339 cmnd->request_bufflen, cmnd->resid);
340 host_status = DID_ERROR;
341
342 /*
343 * Check SLI validation that all the transfer was actually done
344 * (fcpi_parm should be zero). Apply check only to reads.
345 */
346 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
347 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
348 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
349 "%d:0734 FCP Read Check Error Data: "
350 "x%x x%x x%x x%x\n", phba->brd_no,
351 be32_to_cpu(fcpcmd->fcpDl),
352 be32_to_cpu(fcprsp->rspResId),
353 fcpi_parm, cmnd->cmnd[0]);
354 host_status = DID_ERROR;
355 cmnd->resid = cmnd->request_bufflen;
356 }
357
358 out:
359 cmnd->result = ScsiResult(host_status, scsi_status);
360}
361
362static void
363lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
364 struct lpfc_iocbq *pIocbOut)
365{
366 struct lpfc_scsi_buf *lpfc_cmd =
367 (struct lpfc_scsi_buf *) pIocbIn->context1;
368 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
369 struct lpfc_nodelist *pnode = rdata->pnode;
370 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
371 unsigned long iflag;
372
373 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
374 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
375
376 if (lpfc_cmd->status) {
377 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
378 (lpfc_cmd->result & IOERR_DRVR_MASK))
379 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
380 else if (lpfc_cmd->status >= IOSTAT_CNT)
381 lpfc_cmd->status = IOSTAT_DEFAULT;
382
383 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
384 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
385 "x%x result: x%x Data: x%x x%x\n",
386 phba->brd_no, cmd->cmnd[0], cmd->device->id,
387 cmd->device->lun, lpfc_cmd->status,
388 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
389 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
390
391 switch (lpfc_cmd->status) {
392 case IOSTAT_FCP_RSP_ERROR:
393 /* Call FCP RSP handler to determine result */
394 lpfc_handle_fcp_err(lpfc_cmd);
395 break;
396 case IOSTAT_NPORT_BSY:
397 case IOSTAT_FABRIC_BSY:
398 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
399 break;
400 default:
401 cmd->result = ScsiResult(DID_ERROR, 0);
402 break;
403 }
404
405 if (pnode) {
406 if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
407 cmd->result = ScsiResult(DID_BUS_BUSY,
408 SAM_STAT_BUSY);
409 }
410 else {
411 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
412 }
413 } else {
414 cmd->result = ScsiResult(DID_OK, 0);
415 }
416
417 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
418 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
419
420 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
421 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
422 "SNS x%x x%x Data: x%x x%x\n",
423 phba->brd_no, cmd->device->id,
424 cmd->device->lun, cmd, cmd->result,
425 *lp, *(lp + 3), cmd->retries, cmd->resid);
426 }
427
428 spin_lock_irqsave(phba->host->host_lock, iflag);
429 lpfc_free_scsi_buf(lpfc_cmd);
430 cmd->host_scribble = NULL;
431 spin_unlock_irqrestore(phba->host->host_lock, iflag);
432
433 cmd->scsi_done(cmd);
434}
435
436static void
437lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
438 struct lpfc_nodelist *pnode)
439{
440 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
441 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
442 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
443 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
444 int datadir = scsi_cmnd->sc_data_direction;
445
446 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
447
448 lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
449
450 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
451
452 if (scsi_cmnd->device->tagged_supported) {
453 switch (scsi_cmnd->tag) {
454 case HEAD_OF_QUEUE_TAG:
455 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
456 break;
457 case ORDERED_QUEUE_TAG:
458 fcp_cmnd->fcpCntl1 = ORDERED_Q;
459 break;
460 default:
461 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
462 break;
463 }
464 } else
465 fcp_cmnd->fcpCntl1 = 0;
466
467 /*
468 * There are three possibilities here - use scatter-gather segment, use
469 * the single mapping, or neither. Start the lpfc command prep by
470 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
471 * data bde entry.
472 */
473 if (scsi_cmnd->use_sg) {
474 if (datadir == DMA_TO_DEVICE) {
475 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
476 iocb_cmd->un.fcpi.fcpi_parm = 0;
477 iocb_cmd->ulpPU = 0;
478 fcp_cmnd->fcpCntl3 = WRITE_DATA;
479 phba->fc4OutputRequests++;
480 } else {
481 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
482 iocb_cmd->ulpPU = PARM_READ_CHECK;
483 iocb_cmd->un.fcpi.fcpi_parm =
484 scsi_cmnd->request_bufflen;
485 fcp_cmnd->fcpCntl3 = READ_DATA;
486 phba->fc4InputRequests++;
487 }
488 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
489 if (datadir == DMA_TO_DEVICE) {
490 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
491 iocb_cmd->un.fcpi.fcpi_parm = 0;
492 iocb_cmd->ulpPU = 0;
493 fcp_cmnd->fcpCntl3 = WRITE_DATA;
494 phba->fc4OutputRequests++;
495 } else {
496 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
497 iocb_cmd->ulpPU = PARM_READ_CHECK;
498 iocb_cmd->un.fcpi.fcpi_parm =
499 scsi_cmnd->request_bufflen;
500 fcp_cmnd->fcpCntl3 = READ_DATA;
501 phba->fc4InputRequests++;
502 }
503 } else {
504 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
505 iocb_cmd->un.fcpi.fcpi_parm = 0;
506 iocb_cmd->ulpPU = 0;
507 fcp_cmnd->fcpCntl3 = 0;
508 phba->fc4ControlRequests++;
509 }
510
511 /*
512 * Finish initializing those IOCB fields that are independent
513 * of the scsi_cmnd request_buffer
514 */
515 piocbq->iocb.ulpContext = pnode->nlp_rpi;
516 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
517 piocbq->iocb.ulpFCP2Rcvy = 1;
518
519 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
520 piocbq->context1 = lpfc_cmd;
521 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
522 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
523}
524
525static int
526lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
527 struct lpfc_scsi_buf *lpfc_cmd,
528 uint8_t task_mgmt_cmd)
529{
530 struct lpfc_sli *psli;
531 struct lpfc_iocbq *piocbq;
532 IOCB_t *piocb;
533 struct fcp_cmnd *fcp_cmnd;
534 struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
535 struct lpfc_rport_data *rdata = scsi_dev->hostdata;
536 struct lpfc_nodelist *ndlp = rdata->pnode;
537
538 if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
539 return 0;
540 }
541
542 psli = &phba->sli;
543 piocbq = &(lpfc_cmd->cur_iocbq);
544 piocb = &piocbq->iocb;
545
546 fcp_cmnd = lpfc_cmd->fcp_cmnd;
547 lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
548 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
549
550 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
551
552 piocb->ulpContext = ndlp->nlp_rpi;
553 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
554 piocb->ulpFCP2Rcvy = 1;
555 }
556 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
557
558 /* ulpTimeout is only one byte */
559 if (lpfc_cmd->timeout > 0xff) {
560 /*
561 * Do not timeout the command at the firmware level.
562 * The driver will provide the timeout mechanism.
563 */
564 piocb->ulpTimeout = 0;
565 } else {
566 piocb->ulpTimeout = lpfc_cmd->timeout;
567 }
568
569 lpfc_cmd->rdata = rdata;
570
571 switch (task_mgmt_cmd) {
572 case FCP_LUN_RESET:
573 /* Issue LUN Reset to TGT <num> LUN <num> */
574 lpfc_printf_log(phba,
575 KERN_INFO,
576 LOG_FCP,
577 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
578 "Data: x%x x%x\n",
579 phba->brd_no,
580 scsi_dev->id, scsi_dev->lun,
581 ndlp->nlp_rpi, ndlp->nlp_flag);
582
583 break;
584 case FCP_ABORT_TASK_SET:
585 /* Issue Abort Task Set to TGT <num> LUN <num> */
586 lpfc_printf_log(phba,
587 KERN_INFO,
588 LOG_FCP,
589 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
590 "Data: x%x x%x\n",
591 phba->brd_no,
592 scsi_dev->id, scsi_dev->lun,
593 ndlp->nlp_rpi, ndlp->nlp_flag);
594
595 break;
596 case FCP_TARGET_RESET:
597 /* Issue Target Reset to TGT <num> */
598 lpfc_printf_log(phba,
599 KERN_INFO,
600 LOG_FCP,
601 "%d:0702 Issue Target Reset to TGT %d "
602 "Data: x%x x%x\n",
603 phba->brd_no,
604 scsi_dev->id, ndlp->nlp_rpi,
605 ndlp->nlp_flag);
606 break;
607 }
608
609 return (1);
610}
611
612static int
613lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
614{
615 struct lpfc_iocbq *iocbq;
616 struct lpfc_iocbq *iocbqrsp = NULL;
617 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
618 int ret;
619
620 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
621 if (!ret)
622 return FAILED;
623
624 lpfc_cmd->scsi_hba = phba;
625 iocbq = &lpfc_cmd->cur_iocbq;
626 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
627 if (!iocbqrsp)
628 return FAILED;
629 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
630
631 iocbq->iocb_flag |= LPFC_IO_POLL;
632 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
633 &phba->sli.ring[phba->sli.fcp_ring],
634 iocbq, SLI_IOCB_HIGH_PRIORITY,
635 iocbqrsp,
636 lpfc_cmd->timeout);
637 if (ret != IOCB_SUCCESS) {
638 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
639 ret = FAILED;
640 } else {
641 ret = SUCCESS;
642 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
643 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
644 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
645 (lpfc_cmd->result & IOERR_DRVR_MASK))
646 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
647 }
648
649 /*
650 * All outstanding txcmplq I/Os should have been aborted by the target.
651 * Unfortunately, some targets do not abide by this forcing the driver
652 * to double check.
653 */
654 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
655 lpfc_cmd->pCmd->device->id,
656 lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
657
658 /* Return response IOCB to free list. */
659 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
660 return ret;
661}
662
663static void
664lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
665 struct lpfc_iocbq *pIocbOut)
666{
667 unsigned long iflag;
668 struct lpfc_scsi_buf *lpfc_cmd =
669 (struct lpfc_scsi_buf *) pIocbIn->context1;
670
671 spin_lock_irqsave(phba->host->host_lock, iflag);
672 lpfc_free_scsi_buf(lpfc_cmd);
673 spin_unlock_irqrestore(phba->host->host_lock, iflag);
674}
675
676static void
677lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
678 struct lpfc_iocbq *pIocbIn,
679 struct lpfc_iocbq *pIocbOut)
680{
681 struct scsi_cmnd *ml_cmd =
682 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
683
684 lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
685 ml_cmd->host_scribble = NULL;
686}
687
688const char *
689lpfc_info(struct Scsi_Host *host)
690{
691 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
692 int len;
693 static char lpfcinfobuf[384];
694
695 memset(lpfcinfobuf,0,384);
696 if (phba && phba->pcidev){
697 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
698 len = strlen(lpfcinfobuf);
699 snprintf(lpfcinfobuf + len,
700 384-len,
701 " on PCI bus %02x device %02x irq %d",
702 phba->pcidev->bus->number,
703 phba->pcidev->devfn,
704 phba->pcidev->irq);
705 len = strlen(lpfcinfobuf);
706 if (phba->Port[0]) {
707 snprintf(lpfcinfobuf + len,
708 384-len,
709 " port %s",
710 phba->Port);
711 }
712 }
713 return lpfcinfobuf;
714}
715
716static int
717lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
718{
719 struct lpfc_hba *phba =
720 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
721 struct lpfc_sli *psli = &phba->sli;
722 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
723 struct lpfc_nodelist *ndlp = rdata->pnode;
724 struct lpfc_scsi_buf *lpfc_cmd = NULL;
725 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
726 int err = 0;
727
728 /*
729 * The target pointer is guaranteed not to be NULL because the driver
730 * only clears the device->hostdata field in lpfc_slave_destroy. This
731 * approach guarantees no further IO calls on this target.
732 */
733 if (!ndlp) {
734 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
735 goto out_fail_command;
736 }
737
738 /*
739 * A Fibre Channel target is present and functioning only when the node
740 * state is MAPPED. Any other state is a failure.
741 */
742 if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
743 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
744 (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
745 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
746 goto out_fail_command;
747 }
748 /*
749 * The device is most likely recovered and the driver
750 * needs a bit more time to finish. Ask the midlayer
751 * to retry.
752 */
753 goto out_host_busy;
754 }
755
756 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
757 if (lpfc_cmd == NULL) {
758 printk(KERN_WARNING "%s: No buffer available - list empty, "
759 "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
760 goto out_host_busy;
761 }
762
763 /*
764 * Store the midlayer's command structure for the completion phase
765 * and complete the command initialization.
766 */
767 lpfc_cmd->pCmd = cmnd;
768 lpfc_cmd->rdata = rdata;
769 lpfc_cmd->timeout = 0;
770 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
771 cmnd->scsi_done = done;
772
773 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
774 if (err)
775 goto out_host_busy_free_buf;
776
777 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
778
779 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
780 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
781 if (err)
782 goto out_host_busy_free_buf;
783 return 0;
784
785 out_host_busy_free_buf:
786 lpfc_free_scsi_buf(lpfc_cmd);
787 cmnd->host_scribble = NULL;
788 out_host_busy:
789 return SCSI_MLQUEUE_HOST_BUSY;
790
791 out_fail_command:
792 done(cmnd);
793 return 0;
794}
795
796static int
8fa728a2 797__lpfc_abort_handler(struct scsi_cmnd *cmnd)
dea3101e 798{
799 struct lpfc_hba *phba =
800 (struct lpfc_hba *)cmnd->device->host->hostdata[0];
801 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
802 struct lpfc_iocbq *iocb, *next_iocb;
803 struct lpfc_iocbq *abtsiocb = NULL;
804 struct lpfc_scsi_buf *lpfc_cmd;
805 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
806 IOCB_t *cmd, *icmd;
807 unsigned long snum;
808 unsigned int id, lun;
809 unsigned int loop_count = 0;
810 int ret = IOCB_SUCCESS;
811
812 /*
813 * If the host_scribble data area is NULL, then the driver has already
814 * completed this command, but the midlayer did not see the completion
815 * before the eh fired. Just return SUCCESS.
816 */
817 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
818 if (!lpfc_cmd)
819 return SUCCESS;
820
821 /* save these now since lpfc_cmd can be freed */
822 id = lpfc_cmd->pCmd->device->id;
823 lun = lpfc_cmd->pCmd->device->lun;
824 snum = lpfc_cmd->pCmd->serial_number;
825
826 list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
827 cmd = &iocb->iocb;
828 if (iocb->context1 != lpfc_cmd)
829 continue;
830
831 list_del_init(&iocb->list);
832 pring->txq_cnt--;
833 if (!iocb->iocb_cmpl) {
834 list_add_tail(&iocb->list, lpfc_iocb_list);
835 }
836 else {
837 cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
838 cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
839 lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
840 }
841
842 goto out;
843 }
844
845 list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
846 if (abtsiocb == NULL)
847 return FAILED;
848
849 memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
850
851 /*
852 * The scsi command was not in the txq. Check the txcmplq and if it is
853 * found, send an abort to the FW.
854 */
855 list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
856 if (iocb->context1 != lpfc_cmd)
857 continue;
858
859 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
860 cmd = &iocb->iocb;
861 icmd = &abtsiocb->iocb;
862 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
863 icmd->un.acxri.abortContextTag = cmd->ulpContext;
864 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
865
866 icmd->ulpLe = 1;
867 icmd->ulpClass = cmd->ulpClass;
868 if (phba->hba_state >= LPFC_LINK_UP)
869 icmd->ulpCommand = CMD_ABORT_XRI_CN;
870 else
871 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
872
5eb95af0 873 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
dea3101e 874 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
875 IOCB_ERROR) {
876 list_add_tail(&abtsiocb->list, lpfc_iocb_list);
877 ret = IOCB_ERROR;
878 break;
879 }
880
881 /* Wait for abort to complete */
882 while (cmnd->host_scribble)
883 {
884 spin_unlock_irq(phba->host->host_lock);
885 set_current_state(TASK_UNINTERRUPTIBLE);
886 schedule_timeout(LPFC_ABORT_WAIT*HZ);
887 spin_lock_irq(phba->host->host_lock);
888 if (++loop_count
889 > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
890 break;
891 }
892
893 if(cmnd->host_scribble) {
894 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
895 "%d:0748 abort handler timed "
896 "out waiting for abort to "
897 "complete. Data: "
898 "x%x x%x x%x x%lx\n",
899 phba->brd_no, ret, id, lun, snum);
900 cmnd->host_scribble = NULL;
901 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
902 ret = IOCB_ERROR;
903 }
904
905 break;
906 }
907
908 out:
909 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
910 "%d:0749 SCSI layer issued abort device "
911 "Data: x%x x%x x%x x%lx\n",
912 phba->brd_no, ret, id, lun, snum);
913
914 return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
915}
916
8fa728a2
JG		 917static int
918lpfc_abort_handler(struct scsi_cmnd *cmnd)
919{
920 int rc;
921 spin_lock_irq(cmnd->device->host->host_lock);
922 rc = __lpfc_abort_handler(cmnd);
923 spin_unlock_irq(cmnd->device->host->host_lock);
924 return rc;
925}
926
dea3101e 927static int
94d0e7b8 928__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
dea3101e 929{
930 struct Scsi_Host *shost = cmnd->device->host;
931 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
932 struct lpfc_sli *psli = &phba->sli;
933 struct lpfc_scsi_buf *lpfc_cmd = NULL;
934 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
935 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
936 struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
937 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
938 struct lpfc_nodelist *pnode = rdata->pnode;
939 int ret = FAILED;
940 int cnt, loopcnt;
941
942 /*
943 * If target is not in a MAPPED state, delay the reset until
944 * target is rediscovered or nodev timeout expires.
945 */
946 while ( 1 ) {
947 if (!pnode)
948 break;
949
950 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
951 spin_unlock_irq(phba->host->host_lock);
952 set_current_state(TASK_UNINTERRUPTIBLE);
953 schedule_timeout( HZ/2);
954 spin_lock_irq(phba->host->host_lock);
955 }
956 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
957 break;
958 }
959
960 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
961 if (lpfc_cmd == NULL)
962 goto out;
963
964 lpfc_cmd->pCmd = cmnd;
965 lpfc_cmd->timeout = 60;
966 lpfc_cmd->scsi_hba = phba;
967
968 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
969 if (!ret)
970 goto out_free_scsi_buf;
971
972 iocbq = &lpfc_cmd->cur_iocbq;
973
974 /* get a buffer for this IOCB command response */
975 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
976 if (iocbqrsp == NULL)
977 goto out_free_scsi_buf;
978
979 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
980
981 iocbq->iocb_flag |= LPFC_IO_POLL;
982 iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
983
984 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
985 &phba->sli.ring[psli->fcp_ring],
986 iocbq, 0, iocbqrsp, 60);
987 if (ret == IOCB_SUCCESS)
988 ret = SUCCESS;
989
990 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
991 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
992 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
993 if (lpfc_cmd->result & IOERR_DRVR_MASK)
994 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
995
996 /*
997 * All outstanding txcmplq I/Os should have been aborted by the target.
998 * Unfortunately, some targets do not abide by this forcing the driver
999 * to double check.
1000 */
1001 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1002 cmnd->device->id, cmnd->device->lun, 0,
1003 LPFC_CTX_LUN);
1004
1005 loopcnt = 0;
1006 while((cnt = lpfc_sli_sum_iocb(phba,
1007 &phba->sli.ring[phba->sli.fcp_ring],
1008 cmnd->device->id, cmnd->device->lun,
1009 LPFC_CTX_LUN))) {
1010 spin_unlock_irq(phba->host->host_lock);
1011 set_current_state(TASK_UNINTERRUPTIBLE);
1012 schedule_timeout(LPFC_RESET_WAIT*HZ);
1013 spin_lock_irq(phba->host->host_lock);
1014
1015 if (++loopcnt
1016 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1017 break;
1018 }
1019
1020 if (cnt) {
1021 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1022 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1023 phba->brd_no, cnt);
1024 }
1025
1026 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1027
1028out_free_scsi_buf:
1029 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1030 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1031 "Data: x%x x%x x%x\n",
1032 phba->brd_no, lpfc_cmd->pCmd->device->id,
1033 lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1034 lpfc_cmd->result);
1035 lpfc_free_scsi_buf(lpfc_cmd);
1036out:
1037 return ret;
1038}
1039
94d0e7b8
JG		 1040static int
1041lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1042{
1043 int rc;
1044 spin_lock_irq(cmnd->device->host->host_lock);
1045 rc = __lpfc_reset_lun_handler(cmnd);
1046 spin_unlock_irq(cmnd->device->host->host_lock);
1047 return rc;
1048}
1049
dea3101e 1050/*
1051 * Note: midlayer calls this function with the host_lock held
1052 */
1053static int
68b3aa7c 1054__lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
dea3101e 1055{
1056 struct Scsi_Host *shost = cmnd->device->host;
1057 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1058 struct lpfc_nodelist *ndlp = NULL;
1059 int match;
1060 int ret = FAILED, i, err_count = 0;
1061 int cnt, loopcnt;
1062 unsigned int midlayer_id = 0;
1063 struct lpfc_scsi_buf * lpfc_cmd = NULL;
1064 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1065
1066 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1067 if (lpfc_cmd == NULL)
1068 goto out;
1069
1070 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1071 lpfc_cmd->timeout = 60;
1072 lpfc_cmd->pCmd = cmnd;
1073 lpfc_cmd->scsi_hba = phba;
1074
1075 /*
1076 * Since the driver manages a single bus device, reset all
1077 * targets known to the driver. Should any target reset
1078 * fail, this routine returns failure to the midlayer.
1079 */
1080 midlayer_id = cmnd->device->id;
1081 for (i = 0; i < MAX_FCP_TARGET; i++) {
1082 /* Search the mapped list for this target ID */
1083 match = 0;
1084 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1085 if ((i == ndlp->nlp_sid) && ndlp->rport) {
1086 match = 1;
1087 break;
1088 }
1089 }
1090 if (!match)
1091 continue;
1092
1093 lpfc_cmd->pCmd->device->id = i;
1094 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1095 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1096 if (ret != SUCCESS) {
1097 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1098 "%d:0713 Bus Reset on target %d failed\n",
1099 phba->brd_no, i);
1100 err_count++;
1101 }
1102 }
1103
1104 cmnd->device->id = midlayer_id;
1105 loopcnt = 0;
1106 while((cnt = lpfc_sli_sum_iocb(phba,
1107 &phba->sli.ring[phba->sli.fcp_ring],
1108 0, 0, LPFC_CTX_HOST))) {
1109 spin_unlock_irq(phba->host->host_lock);
1110 set_current_state(TASK_UNINTERRUPTIBLE);
1111 schedule_timeout(LPFC_RESET_WAIT*HZ);
1112 spin_lock_irq(phba->host->host_lock);
1113
1114 if (++loopcnt
1115 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1116 break;
1117 }
1118
1119 if (cnt) {
1120 /* flush all outstanding commands on the host */
1121 i = lpfc_sli_abort_iocb(phba,
1122 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1123 LPFC_CTX_HOST);
1124
1125 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1126 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1127 phba->brd_no, cnt, i);
1128 }
1129
1130 if (!err_count)
1131 ret = SUCCESS;
1132
1133 lpfc_free_scsi_buf(lpfc_cmd);
1134 lpfc_printf_log(phba,
1135 KERN_ERR,
1136 LOG_FCP,
1137 "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1138 phba->brd_no, ret);
1139out:
1140 return ret;
1141}
1142
68b3aa7c
JG		 1143static int
1144lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1145{
1146 int rc;
1147 spin_lock_irq(cmnd->device->host->host_lock);
1148 rc = __lpfc_reset_bus_handler(cmnd);
1149 spin_unlock_irq(cmnd->device->host->host_lock);
1150 return rc;
1151}
1152
dea3101e 1153static int
1154lpfc_slave_alloc(struct scsi_device *sdev)
1155{
1156 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1157 struct lpfc_nodelist *ndlp = NULL;
1158 int match = 0;
1159 struct lpfc_scsi_buf *scsi_buf = NULL;
1160 uint32_t total = 0, i;
1161 uint32_t num_to_alloc = 0;
1162 unsigned long flags;
1163 struct list_head *listp;
1164 struct list_head *node_list[6];
1165
1166 /*
1167 * Store the target pointer in the scsi_device hostdata pointer provided
1168 * the driver has already discovered the target id.
1169 */
1170
1171 /* Search the nlp lists other than unmap_list for this target ID */
1172 node_list[0] = &phba->fc_npr_list;
1173 node_list[1] = &phba->fc_nlpmap_list;
1174 node_list[2] = &phba->fc_prli_list;
1175 node_list[3] = &phba->fc_reglogin_list;
1176 node_list[4] = &phba->fc_adisc_list;
1177 node_list[5] = &phba->fc_plogi_list;
1178
1179 for (i = 0; i < 6 && !match; i++) {
1180 listp = node_list[i];
1181 if (list_empty(listp))
1182 continue;
1183 list_for_each_entry(ndlp, listp, nlp_listp) {
1184 if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1185 match = 1;
1186 break;
1187 }
1188 }
1189 }
1190
1191 if (!match)
1192 return -ENXIO;
1193
1194 sdev->hostdata = ndlp->rport->dd_data;
1195
1196 /*
1197 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1198 * available list of scsi buffers. Don't allocate more than the
1199 * HBA limit conveyed to the midlayer via the host structure. Note
1200 * that this list of scsi bufs exists for the lifetime of the driver.
1201 */
1202 total = phba->total_scsi_bufs;
1203 num_to_alloc = LPFC_CMD_PER_LUN;
1204 if (total >= phba->cfg_hba_queue_depth) {
1205 printk(KERN_WARNING "%s, At config limitation of "
1206 "%d allocated scsi_bufs\n", __FUNCTION__, total);
1207 return 0;
1208 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1209 num_to_alloc = phba->cfg_hba_queue_depth - total;
1210 }
1211
1212 for (i = 0; i < num_to_alloc; i++) {
1213 scsi_buf = lpfc_get_scsi_buf(phba);
1214 if (!scsi_buf) {
1215 printk(KERN_ERR "%s, failed to allocate "
1216 "scsi_buf\n", __FUNCTION__);
1217 break;
1218 }
1219
1220 spin_lock_irqsave(phba->host->host_lock, flags);
1221 phba->total_scsi_bufs++;
1222 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1223 spin_unlock_irqrestore(phba->host->host_lock, flags);
1224 }
1225 return 0;
1226}
1227
1228static int
1229lpfc_slave_configure(struct scsi_device *sdev)
1230{
1231 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1232 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1233
1234 if (sdev->tagged_supported)
1235 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1236 else
1237 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1238
1239 /*
1240 * Initialize the fc transport attributes for the target
1241 * containing this scsi device. Also note that the driver's
1242 * target pointer is stored in the starget_data for the
1243 * driver's sysfs entry point functions.
1244 */
1245 rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1246
1247 return 0;
1248}
1249
1250static void
1251lpfc_slave_destroy(struct scsi_device *sdev)
1252{
1253 sdev->hostdata = NULL;
1254 return;
1255}
1256
1257struct scsi_host_template lpfc_template = {
1258 .module = THIS_MODULE,
1259 .name = LPFC_DRIVER_NAME,
1260 .info = lpfc_info,
1261 .queuecommand = lpfc_queuecommand,
1262 .eh_abort_handler = lpfc_abort_handler,
1263 .eh_device_reset_handler= lpfc_reset_lun_handler,
1264 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1265 .slave_alloc = lpfc_slave_alloc,
1266 .slave_configure = lpfc_slave_configure,
1267 .slave_destroy = lpfc_slave_destroy,
1268 .this_id = -1,
1269 .sg_tablesize = LPFC_SG_SEG_CNT,
1270 .cmd_per_lun = LPFC_CMD_PER_LUN,
1271 .use_clustering = ENABLE_CLUSTERING,
1272 .shost_attrs = lpfc_host_attrs,
564b2960 1273 .max_sectors = 0xFFFF,
dea3101e 1274};
Linux kernel - Deliverables
This page took 0.153186 seconds and 5 git commands to generate.