?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] W1: w1_netlink: New init/fini netlink callbacks.
[linux-2.6/verdex.git] / drivers / scsi / lpfc / lpfc_scsi.c
blobb5ad1871d34b3d71e8a11a1b39127b11e323e004
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2005 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 /*
45 * This routine allocates a scsi buffer, which contains all the necessary
46 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
47 * contains information to build the IOCB. The DMAable region contains
48 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
49 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
50 * and the BPL BDE is setup in the IOCB.
51 */
52 static struct lpfc_scsi_buf *
53 lpfc_get_scsi_buf(struct lpfc_hba * phba)
54 {
55 struct lpfc_scsi_buf *psb;
56 struct ulp_bde64 *bpl;
57 IOCB_t *iocb;
58 dma_addr_t pdma_phys;
59
60 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
61 if (!psb)
62 return NULL;
63 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
64 psb->scsi_hba = phba;
65
66 /*
67 * Get memory from the pci pool to map the virt space to pci bus space
68 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
69 * struct fcp_rsp and the number of bde's necessary to support the
70 * sg_tablesize.
71 */
72 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
73 &psb->dma_handle);
74 if (!psb->data) {
75 kfree(psb);
76 return NULL;
77 }
78
79 /* Initialize virtual ptrs to dma_buf region. */
80 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
81
82 psb->fcp_cmnd = psb->data;
83 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
84 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
85 sizeof(struct fcp_rsp);
86
87 /* Initialize local short-hand pointers. */
88 bpl = psb->fcp_bpl;
89 pdma_phys = psb->dma_handle;
90
91 /*
92 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
93 * list bdes. Initialize the first two and leave the rest for
94 * queuecommand.
95 */
96 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
97 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
98 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
99 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
100 bpl->tus.w = le32_to_cpu(bpl->tus.w);
101 bpl++;
102
103 /* Setup the physical region for the FCP RSP */
104 pdma_phys += sizeof (struct fcp_cmnd);
105 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
106 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
107 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
108 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
109 bpl->tus.w = le32_to_cpu(bpl->tus.w);
110
111 /*
112 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
113 * initialize it with all known data now.
114 */
115 pdma_phys += (sizeof (struct fcp_rsp));
116 iocb = &psb->cur_iocbq.iocb;
117 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
118 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
119 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
120 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
121 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
122 iocb->ulpBdeCount = 1;
123 iocb->ulpClass = CLASS3;
124
125 return psb;
126 }
127
128 static void
129 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
130 {
131 struct lpfc_hba *phba = psb->scsi_hba;
132
133 /*
134 * There are only two special cases to consider. (1) the scsi command
135 * requested scatter-gather usage or (2) the scsi command allocated
136 * a request buffer, but did not request use_sg. There is a third
137 * case, but it does not require resource deallocation.
138 */
139 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
140 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
141 psb->seg_cnt, psb->pCmd->sc_data_direction);
142 } else {
143 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
144 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
145 psb->pCmd->request_bufflen,
146 psb->pCmd->sc_data_direction);
147 }
148 }
149
150 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
151 }
152
153 static int
154 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
155 {
156 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
157 struct scatterlist *sgel = NULL;
158 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
159 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
160 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
161 dma_addr_t physaddr;
162 uint32_t i, num_bde = 0;
163 int datadir = scsi_cmnd->sc_data_direction;
164 int dma_error;
165
166 /*
167 * There are three possibilities here - use scatter-gather segment, use
168 * the single mapping, or neither. Start the lpfc command prep by
169 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
170 * data bde entry.
171 */
172 bpl += 2;
173 if (scsi_cmnd->use_sg) {
174 /*
175 * The driver stores the segment count returned from pci_map_sg
176 * because this a count of dma-mappings used to map the use_sg
177 * pages. They are not guaranteed to be the same for those
178 * architectures that implement an IOMMU.
179 */
180 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
181 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
182 scsi_cmnd->use_sg, datadir);
183 if (lpfc_cmd->seg_cnt == 0)
184 return 1;
185
186 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
187 printk(KERN_ERR "%s: Too many sg segments from "
188 "dma_map_sg. Config %d, seg_cnt %d",
189 __FUNCTION__, phba->cfg_sg_seg_cnt,
190 lpfc_cmd->seg_cnt);
191 dma_unmap_sg(&phba->pcidev->dev, sgel,
192 lpfc_cmd->seg_cnt, datadir);
193 return 1;
194 }
195
196 /*
197 * The driver established a maximum scatter-gather segment count
198 * during probe that limits the number of sg elements in any
199 * single scsi command. Just run through the seg_cnt and format
200 * the bde's.
201 */
202 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
203 physaddr = sg_dma_address(sgel);
204 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
205 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
206 bpl->tus.f.bdeSize = sg_dma_len(sgel);
207 if (datadir == DMA_TO_DEVICE)
208 bpl->tus.f.bdeFlags = 0;
209 else
210 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
211 bpl->tus.w = le32_to_cpu(bpl->tus.w);
212 bpl++;
213 sgel++;
214 num_bde++;
215 }
216 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
217 physaddr = dma_map_single(&phba->pcidev->dev,
218 scsi_cmnd->request_buffer,
219 scsi_cmnd->request_bufflen,
220 datadir);
221 dma_error = dma_mapping_error(physaddr);
222 if (dma_error) {
223 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
224 "%d:0718 Unable to dma_map_single "
225 "request_buffer: x%x\n",
226 phba->brd_no, dma_error);
227 return 1;
228 }
229
230 lpfc_cmd->nonsg_phys = physaddr;
231 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
232 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
233 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
234 if (datadir == DMA_TO_DEVICE)
235 bpl->tus.f.bdeFlags = 0;
236 else
237 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
238 bpl->tus.w = le32_to_cpu(bpl->tus.w);
239 num_bde = 1;
240 bpl++;
241 }
242
243 /*
244 * Finish initializing those IOCB fields that are dependent on the
245 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
246 * reinitialized since all iocb memory resources are used many times
247 * for transmit, receive, and continuation bpl's.
248 */
249 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
250 iocb_cmd->un.fcpi64.bdl.bdeSize +=
251 (num_bde * sizeof (struct ulp_bde64));
252 iocb_cmd->ulpBdeCount = 1;
253 iocb_cmd->ulpLe = 1;
254 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
255 return 0;
256 }
257
258 static void
259 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
260 {
261 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
262 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
263 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
264 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
265 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
266 uint32_t resp_info = fcprsp->rspStatus2;
267 uint32_t scsi_status = fcprsp->rspStatus3;
268 uint32_t host_status = DID_OK;
269 uint32_t rsplen = 0;
270
271 /*
272 * If this is a task management command, there is no
273 * scsi packet associated with this lpfc_cmd. The driver
274 * consumes it.
275 */
276 if (fcpcmd->fcpCntl2) {
277 scsi_status = 0;
278 goto out;
279 }
280
281 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
282 "%d:0730 FCP command failed: RSP "
283 "Data: x%x x%x x%x x%x x%x x%x\n",
284 phba->brd_no, resp_info, scsi_status,
285 be32_to_cpu(fcprsp->rspResId),
286 be32_to_cpu(fcprsp->rspSnsLen),
287 be32_to_cpu(fcprsp->rspRspLen),
288 fcprsp->rspInfo3);
289
290 if (resp_info & RSP_LEN_VALID) {
291 rsplen = be32_to_cpu(fcprsp->rspRspLen);
292 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
293 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
294 host_status = DID_ERROR;
295 goto out;
296 }
297 }
298
299 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
300 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
301 if (snslen > SCSI_SENSE_BUFFERSIZE)
302 snslen = SCSI_SENSE_BUFFERSIZE;
303
304 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
305 }
306
307 cmnd->resid = 0;
308 if (resp_info & RESID_UNDER) {
309 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
310
311 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
312 "%d:0716 FCP Read Underrun, expected %d, "
313 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
314 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
315 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
316
317 /*
318 * The cmnd->underflow is the minimum number of bytes that must
319 * be transfered for this command. Provided a sense condition
320 * is not present, make sure the actual amount transferred is at
321 * least the underflow value or fail.
322 */
323 if (!(resp_info & SNS_LEN_VALID) &&
324 (scsi_status == SAM_STAT_GOOD) &&
325 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
326 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
327 "%d:0717 FCP command x%x residual "
328 "underrun converted to error "
329 "Data: x%x x%x x%x\n", phba->brd_no,
330 cmnd->cmnd[0], cmnd->request_bufflen,
331 cmnd->resid, cmnd->underflow);
332
333 host_status = DID_ERROR;
334 }
335 } else if (resp_info & RESID_OVER) {
336 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
337 "%d:0720 FCP command x%x residual "
338 "overrun error. Data: x%x x%x \n",
339 phba->brd_no, cmnd->cmnd[0],
340 cmnd->request_bufflen, cmnd->resid);
341 host_status = DID_ERROR;
342
343 /*
344 * Check SLI validation that all the transfer was actually done
345 * (fcpi_parm should be zero). Apply check only to reads.
346 */
347 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
348 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
349 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
350 "%d:0734 FCP Read Check Error Data: "
351 "x%x x%x x%x x%x\n", phba->brd_no,
352 be32_to_cpu(fcpcmd->fcpDl),
353 be32_to_cpu(fcprsp->rspResId),
354 fcpi_parm, cmnd->cmnd[0]);
355 host_status = DID_ERROR;
356 cmnd->resid = cmnd->request_bufflen;
357 }
358
359 out:
360 cmnd->result = ScsiResult(host_status, scsi_status);
361 }
362
363 static void
364 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
365 struct lpfc_iocbq *pIocbOut)
366 {
367 struct lpfc_scsi_buf *lpfc_cmd =
368 (struct lpfc_scsi_buf *) pIocbIn->context1;
369 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
370 struct lpfc_nodelist *pnode = rdata->pnode;
371 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
372 unsigned long iflag;
373
374 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
375 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
376
377 if (lpfc_cmd->status) {
378 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
379 (lpfc_cmd->result & IOERR_DRVR_MASK))
380 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
381 else if (lpfc_cmd->status >= IOSTAT_CNT)
382 lpfc_cmd->status = IOSTAT_DEFAULT;
383
384 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
385 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
386 "x%x result: x%x Data: x%x x%x\n",
387 phba->brd_no, cmd->cmnd[0], cmd->device->id,
388 cmd->device->lun, lpfc_cmd->status,
389 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
390 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
391
392 switch (lpfc_cmd->status) {
393 case IOSTAT_FCP_RSP_ERROR:
394 /* Call FCP RSP handler to determine result */
395 lpfc_handle_fcp_err(lpfc_cmd);
396 break;
397 case IOSTAT_NPORT_BSY:
398 case IOSTAT_FABRIC_BSY:
399 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
400 break;
401 default:
402 cmd->result = ScsiResult(DID_ERROR, 0);
403 break;
404 }
405
406 if (pnode) {
407 if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
408 cmd->result = ScsiResult(DID_BUS_BUSY,
409 SAM_STAT_BUSY);
410 }
411 else {
412 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
413 }
414 } else {
415 cmd->result = ScsiResult(DID_OK, 0);
416 }
417
418 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
419 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
420
421 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
422 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
423 "SNS x%x x%x Data: x%x x%x\n",
424 phba->brd_no, cmd->device->id,
425 cmd->device->lun, cmd, cmd->result,
426 *lp, *(lp + 3), cmd->retries, cmd->resid);
427 }
428
429 spin_lock_irqsave(phba->host->host_lock, iflag);
430 lpfc_free_scsi_buf(lpfc_cmd);
431 cmd->host_scribble = NULL;
432 spin_unlock_irqrestore(phba->host->host_lock, iflag);
433
434 cmd->scsi_done(cmd);
435 }
436
437 static void
438 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
439 struct lpfc_nodelist *pnode)
440 {
441 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
442 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
443 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
444 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
445 int datadir = scsi_cmnd->sc_data_direction;
446
447 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
448 /* clear task management bits */
449 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
450
451 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
452 &lpfc_cmd->fcp_cmnd->fcp_lun);
453
454 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
455
456 if (scsi_cmnd->device->tagged_supported) {
457 switch (scsi_cmnd->tag) {
458 case HEAD_OF_QUEUE_TAG:
459 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
460 break;
461 case ORDERED_QUEUE_TAG:
462 fcp_cmnd->fcpCntl1 = ORDERED_Q;
463 break;
464 default:
465 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
466 break;
467 }
468 } else
469 fcp_cmnd->fcpCntl1 = 0;
470
471 /*
472 * There are three possibilities here - use scatter-gather segment, use
473 * the single mapping, or neither. Start the lpfc command prep by
474 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
475 * data bde entry.
476 */
477 if (scsi_cmnd->use_sg) {
478 if (datadir == DMA_TO_DEVICE) {
479 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
480 iocb_cmd->un.fcpi.fcpi_parm = 0;
481 iocb_cmd->ulpPU = 0;
482 fcp_cmnd->fcpCntl3 = WRITE_DATA;
483 phba->fc4OutputRequests++;
484 } else {
485 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
486 iocb_cmd->ulpPU = PARM_READ_CHECK;
487 iocb_cmd->un.fcpi.fcpi_parm =
488 scsi_cmnd->request_bufflen;
489 fcp_cmnd->fcpCntl3 = READ_DATA;
490 phba->fc4InputRequests++;
491 }
492 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
493 if (datadir == DMA_TO_DEVICE) {
494 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
495 iocb_cmd->un.fcpi.fcpi_parm = 0;
496 iocb_cmd->ulpPU = 0;
497 fcp_cmnd->fcpCntl3 = WRITE_DATA;
498 phba->fc4OutputRequests++;
499 } else {
500 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
501 iocb_cmd->ulpPU = PARM_READ_CHECK;
502 iocb_cmd->un.fcpi.fcpi_parm =
503 scsi_cmnd->request_bufflen;
504 fcp_cmnd->fcpCntl3 = READ_DATA;
505 phba->fc4InputRequests++;
506 }
507 } else {
508 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
509 iocb_cmd->un.fcpi.fcpi_parm = 0;
510 iocb_cmd->ulpPU = 0;
511 fcp_cmnd->fcpCntl3 = 0;
512 phba->fc4ControlRequests++;
513 }
514
515 /*
516 * Finish initializing those IOCB fields that are independent
517 * of the scsi_cmnd request_buffer
518 */
519 piocbq->iocb.ulpContext = pnode->nlp_rpi;
520 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
521 piocbq->iocb.ulpFCP2Rcvy = 1;
522
523 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
524 piocbq->context1 = lpfc_cmd;
525 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
526 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
527 }
528
529 static int
530 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
531 struct lpfc_scsi_buf *lpfc_cmd,
532 uint8_t task_mgmt_cmd)
533 {
534 struct lpfc_sli *psli;
535 struct lpfc_iocbq *piocbq;
536 IOCB_t *piocb;
537 struct fcp_cmnd *fcp_cmnd;
538 struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
539 struct lpfc_rport_data *rdata = scsi_dev->hostdata;
540 struct lpfc_nodelist *ndlp = rdata->pnode;
541
542 if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
543 return 0;
544 }
545
546 psli = &phba->sli;
547 piocbq = &(lpfc_cmd->cur_iocbq);
548 piocb = &piocbq->iocb;
549
550 fcp_cmnd = lpfc_cmd->fcp_cmnd;
551 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
552 &lpfc_cmd->fcp_cmnd->fcp_lun);
553 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
554
555 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
556
557 piocb->ulpContext = ndlp->nlp_rpi;
558 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
559 piocb->ulpFCP2Rcvy = 1;
560 }
561 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
562
563 /* ulpTimeout is only one byte */
564 if (lpfc_cmd->timeout > 0xff) {
565 /*
566 * Do not timeout the command at the firmware level.
567 * The driver will provide the timeout mechanism.
568 */
569 piocb->ulpTimeout = 0;
570 } else {
571 piocb->ulpTimeout = lpfc_cmd->timeout;
572 }
573
574 lpfc_cmd->rdata = rdata;
575
576 switch (task_mgmt_cmd) {
577 case FCP_LUN_RESET:
578 /* Issue LUN Reset to TGT <num> LUN <num> */
579 lpfc_printf_log(phba,
580 KERN_INFO,
581 LOG_FCP,
582 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
583 "Data: x%x x%x\n",
584 phba->brd_no,
585 scsi_dev->id, scsi_dev->lun,
586 ndlp->nlp_rpi, ndlp->nlp_flag);
587
588 break;
589 case FCP_ABORT_TASK_SET:
590 /* Issue Abort Task Set to TGT <num> LUN <num> */
591 lpfc_printf_log(phba,
592 KERN_INFO,
593 LOG_FCP,
594 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
595 "Data: x%x x%x\n",
596 phba->brd_no,
597 scsi_dev->id, scsi_dev->lun,
598 ndlp->nlp_rpi, ndlp->nlp_flag);
599
600 break;
601 case FCP_TARGET_RESET:
602 /* Issue Target Reset to TGT <num> */
603 lpfc_printf_log(phba,
604 KERN_INFO,
605 LOG_FCP,
606 "%d:0702 Issue Target Reset to TGT %d "
607 "Data: x%x x%x\n",
608 phba->brd_no,
609 scsi_dev->id, ndlp->nlp_rpi,
610 ndlp->nlp_flag);
611 break;
612 }
613
614 return (1);
615 }
616
617 static int
618 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
619 {
620 struct lpfc_iocbq *iocbq;
621 struct lpfc_iocbq *iocbqrsp = NULL;
622 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
623 int ret;
624
625 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
626 if (!ret)
627 return FAILED;
628
629 lpfc_cmd->scsi_hba = phba;
630 iocbq = &lpfc_cmd->cur_iocbq;
631 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
632 if (!iocbqrsp)
633 return FAILED;
634 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
635
636 iocbq->iocb_flag |= LPFC_IO_POLL;
637 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
638 &phba->sli.ring[phba->sli.fcp_ring],
639 iocbq, SLI_IOCB_HIGH_PRIORITY,
640 iocbqrsp,
641 lpfc_cmd->timeout);
642 if (ret != IOCB_SUCCESS) {
643 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
644 ret = FAILED;
645 } else {
646 ret = SUCCESS;
647 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
648 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
649 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
650 (lpfc_cmd->result & IOERR_DRVR_MASK))
651 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
652 }
653
654 /*
655 * All outstanding txcmplq I/Os should have been aborted by the target.
656 * Unfortunately, some targets do not abide by this forcing the driver
657 * to double check.
658 */
659 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
660 lpfc_cmd->pCmd->device->id,
661 lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
662
663 /* Return response IOCB to free list. */
664 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
665 return ret;
666 }
667
668 static void
669 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
670 struct lpfc_iocbq *pIocbOut)
671 {
672 unsigned long iflag;
673 struct lpfc_scsi_buf *lpfc_cmd =
674 (struct lpfc_scsi_buf *) pIocbIn->context1;
675
676 spin_lock_irqsave(phba->host->host_lock, iflag);
677 lpfc_free_scsi_buf(lpfc_cmd);
678 spin_unlock_irqrestore(phba->host->host_lock, iflag);
679 }
680
681 static void
682 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
683 struct lpfc_iocbq *pIocbIn,
684 struct lpfc_iocbq *pIocbOut)
685 {
686 struct scsi_cmnd *ml_cmd =
687 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
688
689 lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
690 ml_cmd->host_scribble = NULL;
691 }
692
693 const char *
694 lpfc_info(struct Scsi_Host *host)
695 {
696 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
697 int len;
698 static char lpfcinfobuf[384];
699
700 memset(lpfcinfobuf,0,384);
701 if (phba && phba->pcidev){
702 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
703 len = strlen(lpfcinfobuf);
704 snprintf(lpfcinfobuf + len,
705 384-len,
706 " on PCI bus %02x device %02x irq %d",
707 phba->pcidev->bus->number,
708 phba->pcidev->devfn,
709 phba->pcidev->irq);
710 len = strlen(lpfcinfobuf);
711 if (phba->Port[0]) {
712 snprintf(lpfcinfobuf + len,
713 384-len,
714 " port %s",
715 phba->Port);
716 }
717 }
718 return lpfcinfobuf;
719 }
720
721 static int
722 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
723 {
724 struct lpfc_hba *phba =
725 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
726 struct lpfc_sli *psli = &phba->sli;
727 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
728 struct lpfc_nodelist *ndlp = rdata->pnode;
729 struct lpfc_scsi_buf *lpfc_cmd = NULL;
730 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
731 int err = 0;
732
733 /*
734 * The target pointer is guaranteed not to be NULL because the driver
735 * only clears the device->hostdata field in lpfc_slave_destroy. This
736 * approach guarantees no further IO calls on this target.
737 */
738 if (!ndlp) {
739 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
740 goto out_fail_command;
741 }
742
743 /*
744 * A Fibre Channel target is present and functioning only when the node
745 * state is MAPPED. Any other state is a failure.
746 */
747 if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
748 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
749 (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
750 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
751 goto out_fail_command;
752 }
753 else if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
754 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
755 goto out_fail_command;
756 }
757 /*
758 * The device is most likely recovered and the driver
759 * needs a bit more time to finish. Ask the midlayer
760 * to retry.
761 */
762 goto out_host_busy;
763 }
764
765 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
766 if (lpfc_cmd == NULL) {
767 printk(KERN_WARNING "%s: No buffer available - list empty, "
768 "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
769 goto out_host_busy;
770 }
771
772 /*
773 * Store the midlayer's command structure for the completion phase
774 * and complete the command initialization.
775 */
776 lpfc_cmd->pCmd = cmnd;
777 lpfc_cmd->rdata = rdata;
778 lpfc_cmd->timeout = 0;
779 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
780 cmnd->scsi_done = done;
781
782 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
783 if (err)
784 goto out_host_busy_free_buf;
785
786 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
787
788 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
789 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
790 if (err)
791 goto out_host_busy_free_buf;
792 return 0;
793
794 out_host_busy_free_buf:
795 lpfc_free_scsi_buf(lpfc_cmd);
796 cmnd->host_scribble = NULL;
797 out_host_busy:
798 return SCSI_MLQUEUE_HOST_BUSY;
799
800 out_fail_command:
801 done(cmnd);
802 return 0;
803 }
804
805 static int
806 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
807 {
808 struct lpfc_hba *phba =
809 (struct lpfc_hba *)cmnd->device->host->hostdata[0];
810 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
811 struct lpfc_iocbq *iocb, *next_iocb;
812 struct lpfc_iocbq *abtsiocb = NULL;
813 struct lpfc_scsi_buf *lpfc_cmd;
814 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
815 IOCB_t *cmd, *icmd;
816 unsigned long snum;
817 unsigned int id, lun;
818 unsigned int loop_count = 0;
819 int ret = IOCB_SUCCESS;
820
821 /*
822 * If the host_scribble data area is NULL, then the driver has already
823 * completed this command, but the midlayer did not see the completion
824 * before the eh fired. Just return SUCCESS.
825 */
826 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
827 if (!lpfc_cmd)
828 return SUCCESS;
829
830 /* save these now since lpfc_cmd can be freed */
831 id = lpfc_cmd->pCmd->device->id;
832 lun = lpfc_cmd->pCmd->device->lun;
833 snum = lpfc_cmd->pCmd->serial_number;
834
835 list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
836 cmd = &iocb->iocb;
837 if (iocb->context1 != lpfc_cmd)
838 continue;
839
840 list_del_init(&iocb->list);
841 pring->txq_cnt--;
842 if (!iocb->iocb_cmpl) {
843 list_add_tail(&iocb->list, lpfc_iocb_list);
844 }
845 else {
846 cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
847 cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
848 lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
849 }
850
851 goto out;
852 }
853
854 list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
855 if (abtsiocb == NULL)
856 return FAILED;
857
858 memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
859
860 /*
861 * The scsi command was not in the txq. Check the txcmplq and if it is
862 * found, send an abort to the FW.
863 */
864 list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
865 if (iocb->context1 != lpfc_cmd)
866 continue;
867
868 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
869 cmd = &iocb->iocb;
870 icmd = &abtsiocb->iocb;
871 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
872 icmd->un.acxri.abortContextTag = cmd->ulpContext;
873 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
874
875 icmd->ulpLe = 1;
876 icmd->ulpClass = cmd->ulpClass;
877 if (phba->hba_state >= LPFC_LINK_UP)
878 icmd->ulpCommand = CMD_ABORT_XRI_CN;
879 else
880 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
881
882 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
883 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
884 IOCB_ERROR) {
885 list_add_tail(&abtsiocb->list, lpfc_iocb_list);
886 ret = IOCB_ERROR;
887 break;
888 }
889
890 /* Wait for abort to complete */
891 while (cmnd->host_scribble)
892 {
893 spin_unlock_irq(phba->host->host_lock);
894 set_current_state(TASK_UNINTERRUPTIBLE);
895 schedule_timeout(LPFC_ABORT_WAIT*HZ);
896 spin_lock_irq(phba->host->host_lock);
897 if (++loop_count
898 > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
899 break;
900 }
901
902 if(cmnd->host_scribble) {
903 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
904 "%d:0748 abort handler timed "
905 "out waiting for abort to "
906 "complete. Data: "
907 "x%x x%x x%x x%lx\n",
908 phba->brd_no, ret, id, lun, snum);
909 cmnd->host_scribble = NULL;
910 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
911 ret = IOCB_ERROR;
912 }
913
914 break;
915 }
916
917 out:
918 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
919 "%d:0749 SCSI layer issued abort device "
920 "Data: x%x x%x x%x x%lx\n",
921 phba->brd_no, ret, id, lun, snum);
922
923 return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
924 }
925
926 static int
927 lpfc_abort_handler(struct scsi_cmnd *cmnd)
928 {
929 int rc;
930 spin_lock_irq(cmnd->device->host->host_lock);
931 rc = __lpfc_abort_handler(cmnd);
932 spin_unlock_irq(cmnd->device->host->host_lock);
933 return rc;
934 }
935
936 static int
937 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
938 {
939 struct Scsi_Host *shost = cmnd->device->host;
940 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
941 struct lpfc_sli *psli = &phba->sli;
942 struct lpfc_scsi_buf *lpfc_cmd = NULL;
943 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
944 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
945 struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
946 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
947 struct lpfc_nodelist *pnode = rdata->pnode;
948 int ret = FAILED;
949 int cnt, loopcnt;
950
951 /*
952 * If target is not in a MAPPED state, delay the reset until
953 * target is rediscovered or nodev timeout expires.
954 */
955 while ( 1 ) {
956 if (!pnode)
957 break;
958
959 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
960 spin_unlock_irq(phba->host->host_lock);
961 set_current_state(TASK_UNINTERRUPTIBLE);
962 schedule_timeout( HZ/2);
963 spin_lock_irq(phba->host->host_lock);
964 }
965 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
966 break;
967 }
968
969 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
970 if (lpfc_cmd == NULL)
971 goto out;
972
973 lpfc_cmd->pCmd = cmnd;
974 lpfc_cmd->timeout = 60;
975 lpfc_cmd->scsi_hba = phba;
976
977 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
978 if (!ret)
979 goto out_free_scsi_buf;
980
981 iocbq = &lpfc_cmd->cur_iocbq;
982
983 /* get a buffer for this IOCB command response */
984 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
985 if (iocbqrsp == NULL)
986 goto out_free_scsi_buf;
987
988 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
989
990 iocbq->iocb_flag |= LPFC_IO_POLL;
991 iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
992
993 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
994 &phba->sli.ring[psli->fcp_ring],
995 iocbq, 0, iocbqrsp, 60);
996 if (ret == IOCB_SUCCESS)
997 ret = SUCCESS;
998
999 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
1000 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1001 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
1002 if (lpfc_cmd->result & IOERR_DRVR_MASK)
1003 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1004
1005 /*
1006 * All outstanding txcmplq I/Os should have been aborted by the target.
1007 * Unfortunately, some targets do not abide by this forcing the driver
1008 * to double check.
1009 */
1010 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1011 cmnd->device->id, cmnd->device->lun, 0,
1012 LPFC_CTX_LUN);
1013
1014 loopcnt = 0;
1015 while((cnt = lpfc_sli_sum_iocb(phba,
1016 &phba->sli.ring[phba->sli.fcp_ring],
1017 cmnd->device->id, cmnd->device->lun,
1018 LPFC_CTX_LUN))) {
1019 spin_unlock_irq(phba->host->host_lock);
1020 set_current_state(TASK_UNINTERRUPTIBLE);
1021 schedule_timeout(LPFC_RESET_WAIT*HZ);
1022 spin_lock_irq(phba->host->host_lock);
1023
1024 if (++loopcnt
1025 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1026 break;
1027 }
1028
1029 if (cnt) {
1030 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1031 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1032 phba->brd_no, cnt);
1033 }
1034
1035 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1036
1037 out_free_scsi_buf:
1038 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1039 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1040 "Data: x%x x%x x%x\n",
1041 phba->brd_no, lpfc_cmd->pCmd->device->id,
1042 lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1043 lpfc_cmd->result);
1044 lpfc_free_scsi_buf(lpfc_cmd);
1045 out:
1046 return ret;
1047 }
1048
1049 static int
1050 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1051 {
1052 int rc;
1053 spin_lock_irq(cmnd->device->host->host_lock);
1054 rc = __lpfc_reset_lun_handler(cmnd);
1055 spin_unlock_irq(cmnd->device->host->host_lock);
1056 return rc;
1057 }
1058
1059 /*
1060 * Note: midlayer calls this function with the host_lock held
1061 */
1062 static int
1063 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1064 {
1065 struct Scsi_Host *shost = cmnd->device->host;
1066 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1067 struct lpfc_nodelist *ndlp = NULL;
1068 int match;
1069 int ret = FAILED, i, err_count = 0;
1070 int cnt, loopcnt;
1071 unsigned int midlayer_id = 0;
1072 struct lpfc_scsi_buf * lpfc_cmd = NULL;
1073 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1074
1075 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1076 if (lpfc_cmd == NULL)
1077 goto out;
1078
1079 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1080 lpfc_cmd->timeout = 60;
1081 lpfc_cmd->pCmd = cmnd;
1082 lpfc_cmd->scsi_hba = phba;
1083
1084 /*
1085 * Since the driver manages a single bus device, reset all
1086 * targets known to the driver. Should any target reset
1087 * fail, this routine returns failure to the midlayer.
1088 */
1089 midlayer_id = cmnd->device->id;
1090 for (i = 0; i < MAX_FCP_TARGET; i++) {
1091 /* Search the mapped list for this target ID */
1092 match = 0;
1093 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1094 if ((i == ndlp->nlp_sid) && ndlp->rport) {
1095 match = 1;
1096 break;
1097 }
1098 }
1099 if (!match)
1100 continue;
1101
1102 lpfc_cmd->pCmd->device->id = i;
1103 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1104 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1105 if (ret != SUCCESS) {
1106 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1107 "%d:0713 Bus Reset on target %d failed\n",
1108 phba->brd_no, i);
1109 err_count++;
1110 }
1111 }
1112
1113 cmnd->device->id = midlayer_id;
1114 loopcnt = 0;
1115 while((cnt = lpfc_sli_sum_iocb(phba,
1116 &phba->sli.ring[phba->sli.fcp_ring],
1117 0, 0, LPFC_CTX_HOST))) {
1118 spin_unlock_irq(phba->host->host_lock);
1119 set_current_state(TASK_UNINTERRUPTIBLE);
1120 schedule_timeout(LPFC_RESET_WAIT*HZ);
1121 spin_lock_irq(phba->host->host_lock);
1122
1123 if (++loopcnt
1124 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1125 break;
1126 }
1127
1128 if (cnt) {
1129 /* flush all outstanding commands on the host */
1130 i = lpfc_sli_abort_iocb(phba,
1131 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1132 LPFC_CTX_HOST);
1133
1134 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1135 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1136 phba->brd_no, cnt, i);
1137 }
1138
1139 if (!err_count)
1140 ret = SUCCESS;
1141
1142 lpfc_free_scsi_buf(lpfc_cmd);
1143 lpfc_printf_log(phba,
1144 KERN_ERR,
1145 LOG_FCP,
1146 "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1147 phba->brd_no, ret);
1148 out:
1149 return ret;
1150 }
1151
1152 static int
1153 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1154 {
1155 int rc;
1156 spin_lock_irq(cmnd->device->host->host_lock);
1157 rc = __lpfc_reset_bus_handler(cmnd);
1158 spin_unlock_irq(cmnd->device->host->host_lock);
1159 return rc;
1160 }
1161
1162 static int
1163 lpfc_slave_alloc(struct scsi_device *sdev)
1164 {
1165 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1166 struct lpfc_nodelist *ndlp = NULL;
1167 int match = 0;
1168 struct lpfc_scsi_buf *scsi_buf = NULL;
1169 uint32_t total = 0, i;
1170 uint32_t num_to_alloc = 0;
1171 unsigned long flags;
1172 struct list_head *listp;
1173 struct list_head *node_list[6];
1174
1175 /*
1176 * Store the target pointer in the scsi_device hostdata pointer provided
1177 * the driver has already discovered the target id.
1178 */
1179
1180 /* Search the nlp lists other than unmap_list for this target ID */
1181 node_list[0] = &phba->fc_npr_list;
1182 node_list[1] = &phba->fc_nlpmap_list;
1183 node_list[2] = &phba->fc_prli_list;
1184 node_list[3] = &phba->fc_reglogin_list;
1185 node_list[4] = &phba->fc_adisc_list;
1186 node_list[5] = &phba->fc_plogi_list;
1187
1188 for (i = 0; i < 6 && !match; i++) {
1189 listp = node_list[i];
1190 if (list_empty(listp))
1191 continue;
1192 list_for_each_entry(ndlp, listp, nlp_listp) {
1193 if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1194 match = 1;
1195 break;
1196 }
1197 }
1198 }
1199
1200 if (!match)
1201 return -ENXIO;
1202
1203 sdev->hostdata = ndlp->rport->dd_data;
1204
1205 /*
1206 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1207 * available list of scsi buffers. Don't allocate more than the
1208 * HBA limit conveyed to the midlayer via the host structure. Note
1209 * that this list of scsi bufs exists for the lifetime of the driver.
1210 */
1211 total = phba->total_scsi_bufs;
1212 num_to_alloc = LPFC_CMD_PER_LUN;
1213 if (total >= phba->cfg_hba_queue_depth) {
1214 printk(KERN_WARNING "%s, At config limitation of "
1215 "%d allocated scsi_bufs\n", __FUNCTION__, total);
1216 return 0;
1217 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1218 num_to_alloc = phba->cfg_hba_queue_depth - total;
1219 }
1220
1221 for (i = 0; i < num_to_alloc; i++) {
1222 scsi_buf = lpfc_get_scsi_buf(phba);
1223 if (!scsi_buf) {
1224 printk(KERN_ERR "%s, failed to allocate "
1225 "scsi_buf\n", __FUNCTION__);
1226 break;
1227 }
1228
1229 spin_lock_irqsave(phba->host->host_lock, flags);
1230 phba->total_scsi_bufs++;
1231 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1232 spin_unlock_irqrestore(phba->host->host_lock, flags);
1233 }
1234 return 0;
1235 }
1236
1237 static int
1238 lpfc_slave_configure(struct scsi_device *sdev)
1239 {
1240 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1241 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1242
1243 if (sdev->tagged_supported)
1244 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1245 else
1246 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1247
1248 /*
1249 * Initialize the fc transport attributes for the target
1250 * containing this scsi device. Also note that the driver's
1251 * target pointer is stored in the starget_data for the
1252 * driver's sysfs entry point functions.
1253 */
1254 rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1255
1256 return 0;
1257 }
1258
1259 static void
1260 lpfc_slave_destroy(struct scsi_device *sdev)
1261 {
1262 sdev->hostdata = NULL;
1263 return;
1264 }
1265
1266 struct scsi_host_template lpfc_template = {
1267 .module = THIS_MODULE,
1268 .name = LPFC_DRIVER_NAME,
1269 .info = lpfc_info,
1270 .queuecommand = lpfc_queuecommand,
1271 .eh_abort_handler = lpfc_abort_handler,
1272 .eh_device_reset_handler= lpfc_reset_lun_handler,
1273 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1274 .slave_alloc = lpfc_slave_alloc,
1275 .slave_configure = lpfc_slave_configure,
1276 .slave_destroy = lpfc_slave_destroy,
1277 .this_id = -1,
1278 .sg_tablesize = LPFC_SG_SEG_CNT,
1279 .cmd_per_lun = LPFC_CMD_PER_LUN,
1280 .use_clustering = ENABLE_CLUSTERING,
1281 .shost_attrs = lpfc_host_attrs,
1282 .max_sectors = 0xFFFF,
1283 };
Verdex Pro support