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[SCSI] lpfc driver 8.0.30 : fix lip/cablepull panic
[linux-2.6-block.git] / drivers / scsi / lpfc / lpfc_scsi.c
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dea3101e 1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
c44ce173
JSEC		 3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2005 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
dea3101e 6 * www.emulex.com *
c44ce173 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
dea3101e 8 * *
9 * This program is free software; you can redistribute it and/or *
c44ce173
JSEC		 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. *
dea3101e 20 *******************************************************************/
21
dea3101e 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
43static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
44{
45 fcmd->fcpLunLsl = 0;
46 fcmd->fcpLunMsl = swab16((uint16_t)lun);
47}
48
49/*
50 * This routine allocates a scsi buffer, which contains all the necessary
51 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
52 * contains information to build the IOCB. The DMAable region contains
53 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
54 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
55 * and the BPL BDE is setup in the IOCB.
56 */
57static struct lpfc_scsi_buf *
58lpfc_get_scsi_buf(struct lpfc_hba * phba)
59{
60 struct lpfc_scsi_buf *psb;
61 struct ulp_bde64 *bpl;
62 IOCB_t *iocb;
63 dma_addr_t pdma_phys;
64
65 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
66 if (!psb)
67 return NULL;
68 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
69 psb->scsi_hba = phba;
70
71 /*
72 * Get memory from the pci pool to map the virt space to pci bus space
73 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
74 * struct fcp_rsp and the number of bde's necessary to support the
75 * sg_tablesize.
76 */
77 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
78 &psb->dma_handle);
79 if (!psb->data) {
80 kfree(psb);
81 return NULL;
82 }
83
84 /* Initialize virtual ptrs to dma_buf region. */
85 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
86
87 psb->fcp_cmnd = psb->data;
88 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
89 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
90 sizeof(struct fcp_rsp);
91
92 /* Initialize local short-hand pointers. */
93 bpl = psb->fcp_bpl;
94 pdma_phys = psb->dma_handle;
95
96 /*
97 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
98 * list bdes. Initialize the first two and leave the rest for
99 * queuecommand.
100 */
101 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
102 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
103 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
104 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
105 bpl->tus.w = le32_to_cpu(bpl->tus.w);
106 bpl++;
107
108 /* Setup the physical region for the FCP RSP */
109 pdma_phys += sizeof (struct fcp_cmnd);
110 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
111 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
112 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
113 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
114 bpl->tus.w = le32_to_cpu(bpl->tus.w);
115
116 /*
117 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
118 * initialize it with all known data now.
119 */
120 pdma_phys += (sizeof (struct fcp_rsp));
121 iocb = &psb->cur_iocbq.iocb;
122 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
123 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
124 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
125 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
126 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
127 iocb->ulpBdeCount = 1;
128 iocb->ulpClass = CLASS3;
129
130 return psb;
131}
132
133static void
134lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
135{
136 struct lpfc_hba *phba = psb->scsi_hba;
137
138 /*
139 * There are only two special cases to consider. (1) the scsi command
140 * requested scatter-gather usage or (2) the scsi command allocated
141 * a request buffer, but did not request use_sg. There is a third
142 * case, but it does not require resource deallocation.
143 */
144 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
145 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
146 psb->seg_cnt, psb->pCmd->sc_data_direction);
147 } else {
148 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
149 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
150 psb->pCmd->request_bufflen,
151 psb->pCmd->sc_data_direction);
152 }
153 }
154
155 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
156}
157
158static int
159lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
160{
161 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
162 struct scatterlist *sgel = NULL;
163 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
164 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
165 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
166 dma_addr_t physaddr;
167 uint32_t i, num_bde = 0;
168 int datadir = scsi_cmnd->sc_data_direction;
169 int dma_error;
170
171 /*
172 * There are three possibilities here - use scatter-gather segment, use
173 * the single mapping, or neither. Start the lpfc command prep by
174 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
175 * data bde entry.
176 */
177 bpl += 2;
178 if (scsi_cmnd->use_sg) {
179 /*
180 * The driver stores the segment count returned from pci_map_sg
181 * because this a count of dma-mappings used to map the use_sg
182 * pages. They are not guaranteed to be the same for those
183 * architectures that implement an IOMMU.
184 */
185 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
186 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
187 scsi_cmnd->use_sg, datadir);
188 if (lpfc_cmd->seg_cnt == 0)
189 return 1;
190
191 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
192 printk(KERN_ERR "%s: Too many sg segments from "
193 "dma_map_sg. Config %d, seg_cnt %d",
194 __FUNCTION__, phba->cfg_sg_seg_cnt,
195 lpfc_cmd->seg_cnt);
196 dma_unmap_sg(&phba->pcidev->dev, sgel,
197 lpfc_cmd->seg_cnt, datadir);
198 return 1;
199 }
200
201 /*
202 * The driver established a maximum scatter-gather segment count
203 * during probe that limits the number of sg elements in any
204 * single scsi command. Just run through the seg_cnt and format
205 * the bde's.
206 */
207 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
208 physaddr = sg_dma_address(sgel);
209 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
210 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
211 bpl->tus.f.bdeSize = sg_dma_len(sgel);
212 if (datadir == DMA_TO_DEVICE)
213 bpl->tus.f.bdeFlags = 0;
214 else
215 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
216 bpl->tus.w = le32_to_cpu(bpl->tus.w);
217 bpl++;
218 sgel++;
219 num_bde++;
220 }
221 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
222 physaddr = dma_map_single(&phba->pcidev->dev,
223 scsi_cmnd->request_buffer,
224 scsi_cmnd->request_bufflen,
225 datadir);
226 dma_error = dma_mapping_error(physaddr);
227 if (dma_error) {
228 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
229 "%d:0718 Unable to dma_map_single "
230 "request_buffer: x%x\n",
231 phba->brd_no, dma_error);
232 return 1;
233 }
234
235 lpfc_cmd->nonsg_phys = physaddr;
236 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
237 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
238 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
239 if (datadir == DMA_TO_DEVICE)
240 bpl->tus.f.bdeFlags = 0;
483f05f0
JSEC		 241 else
242 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
dea3101e 243 bpl->tus.w = le32_to_cpu(bpl->tus.w);
244 num_bde = 1;
245 bpl++;
246 }
247
248 /*
249 * Finish initializing those IOCB fields that are dependent on the
483f05f0
JSEC		 250 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
251 * reinitialized since all iocb memory resources are used many times
252 * for transmit, receive, and continuation bpl's.
dea3101e 253 */
483f05f0 254 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
dea3101e 255 iocb_cmd->un.fcpi64.bdl.bdeSize +=
256 (num_bde * sizeof (struct ulp_bde64));
257 iocb_cmd->ulpBdeCount = 1;
258 iocb_cmd->ulpLe = 1;
259 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
260 return 0;
261}
262
263static void
264lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
265{
266 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
267 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
268 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
269 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
270 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
271 uint32_t resp_info = fcprsp->rspStatus2;
272 uint32_t scsi_status = fcprsp->rspStatus3;
273 uint32_t host_status = DID_OK;
274 uint32_t rsplen = 0;
275
276 /*
277 * If this is a task management command, there is no
278 * scsi packet associated with this lpfc_cmd. The driver
279 * consumes it.
280 */
281 if (fcpcmd->fcpCntl2) {
282 scsi_status = 0;
283 goto out;
284 }
285
286 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
287 "%d:0730 FCP command failed: RSP "
288 "Data: x%x x%x x%x x%x x%x x%x\n",
289 phba->brd_no, resp_info, scsi_status,
290 be32_to_cpu(fcprsp->rspResId),
291 be32_to_cpu(fcprsp->rspSnsLen),
292 be32_to_cpu(fcprsp->rspRspLen),
293 fcprsp->rspInfo3);
294
295 if (resp_info & RSP_LEN_VALID) {
296 rsplen = be32_to_cpu(fcprsp->rspRspLen);
297 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
298 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
299 host_status = DID_ERROR;
300 goto out;
301 }
302 }
303
304 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
305 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
306 if (snslen > SCSI_SENSE_BUFFERSIZE)
307 snslen = SCSI_SENSE_BUFFERSIZE;
308
309 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
310 }
311
312 cmnd->resid = 0;
313 if (resp_info & RESID_UNDER) {
314 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
315
316 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
317 "%d:0716 FCP Read Underrun, expected %d, "
318 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
319 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
320 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
321
322 /*
323 * The cmnd->underflow is the minimum number of bytes that must
324 * be transfered for this command. Provided a sense condition
325 * is not present, make sure the actual amount transferred is at
326 * least the underflow value or fail.
327 */
328 if (!(resp_info & SNS_LEN_VALID) &&
329 (scsi_status == SAM_STAT_GOOD) &&
330 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
331 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
332 "%d:0717 FCP command x%x residual "
333 "underrun converted to error "
334 "Data: x%x x%x x%x\n", phba->brd_no,
335 cmnd->cmnd[0], cmnd->request_bufflen,
336 cmnd->resid, cmnd->underflow);
337
338 host_status = DID_ERROR;
339 }
340 } else if (resp_info & RESID_OVER) {
341 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
342 "%d:0720 FCP command x%x residual "
343 "overrun error. Data: x%x x%x \n",
344 phba->brd_no, cmnd->cmnd[0],
345 cmnd->request_bufflen, cmnd->resid);
346 host_status = DID_ERROR;
347
348 /*
349 * Check SLI validation that all the transfer was actually done
350 * (fcpi_parm should be zero). Apply check only to reads.
351 */
352 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
353 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
354 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
355 "%d:0734 FCP Read Check Error Data: "
356 "x%x x%x x%x x%x\n", phba->brd_no,
357 be32_to_cpu(fcpcmd->fcpDl),
358 be32_to_cpu(fcprsp->rspResId),
359 fcpi_parm, cmnd->cmnd[0]);
360 host_status = DID_ERROR;
361 cmnd->resid = cmnd->request_bufflen;
362 }
363
364 out:
365 cmnd->result = ScsiResult(host_status, scsi_status);
366}
367
368static void
369lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
370 struct lpfc_iocbq *pIocbOut)
371{
372 struct lpfc_scsi_buf *lpfc_cmd =
373 (struct lpfc_scsi_buf *) pIocbIn->context1;
374 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
375 struct lpfc_nodelist *pnode = rdata->pnode;
376 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
377 unsigned long iflag;
378
379 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
380 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
381
382 if (lpfc_cmd->status) {
383 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
384 (lpfc_cmd->result & IOERR_DRVR_MASK))
385 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
386 else if (lpfc_cmd->status >= IOSTAT_CNT)
387 lpfc_cmd->status = IOSTAT_DEFAULT;
388
389 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
390 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
391 "x%x result: x%x Data: x%x x%x\n",
392 phba->brd_no, cmd->cmnd[0], cmd->device->id,
393 cmd->device->lun, lpfc_cmd->status,
394 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
395 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
396
397 switch (lpfc_cmd->status) {
398 case IOSTAT_FCP_RSP_ERROR:
399 /* Call FCP RSP handler to determine result */
400 lpfc_handle_fcp_err(lpfc_cmd);
401 break;
402 case IOSTAT_NPORT_BSY:
403 case IOSTAT_FABRIC_BSY:
404 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
405 break;
406 default:
407 cmd->result = ScsiResult(DID_ERROR, 0);
408 break;
409 }
410
411 if (pnode) {
412 if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
413 cmd->result = ScsiResult(DID_BUS_BUSY,
414 SAM_STAT_BUSY);
415 }
416 else {
417 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
418 }
419 } else {
420 cmd->result = ScsiResult(DID_OK, 0);
421 }
422
423 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
424 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
425
426 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
427 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
428 "SNS x%x x%x Data: x%x x%x\n",
429 phba->brd_no, cmd->device->id,
430 cmd->device->lun, cmd, cmd->result,
431 *lp, *(lp + 3), cmd->retries, cmd->resid);
432 }
433
434 spin_lock_irqsave(phba->host->host_lock, iflag);
435 lpfc_free_scsi_buf(lpfc_cmd);
436 cmd->host_scribble = NULL;
437 spin_unlock_irqrestore(phba->host->host_lock, iflag);
438
439 cmd->scsi_done(cmd);
440}
441
442static void
443lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
444 struct lpfc_nodelist *pnode)
445{
446 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
447 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
448 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
449 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
450 int datadir = scsi_cmnd->sc_data_direction;
451
452 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
453
454 lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
455
456 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
457
458 if (scsi_cmnd->device->tagged_supported) {
459 switch (scsi_cmnd->tag) {
460 case HEAD_OF_QUEUE_TAG:
461 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
462 break;
463 case ORDERED_QUEUE_TAG:
464 fcp_cmnd->fcpCntl1 = ORDERED_Q;
465 break;
466 default:
467 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
468 break;
469 }
470 } else
471 fcp_cmnd->fcpCntl1 = 0;
472
473 /*
474 * There are three possibilities here - use scatter-gather segment, use
475 * the single mapping, or neither. Start the lpfc command prep by
476 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
477 * data bde entry.
478 */
479 if (scsi_cmnd->use_sg) {
480 if (datadir == DMA_TO_DEVICE) {
481 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
482 iocb_cmd->un.fcpi.fcpi_parm = 0;
483 iocb_cmd->ulpPU = 0;
484 fcp_cmnd->fcpCntl3 = WRITE_DATA;
485 phba->fc4OutputRequests++;
486 } else {
487 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
488 iocb_cmd->ulpPU = PARM_READ_CHECK;
489 iocb_cmd->un.fcpi.fcpi_parm =
490 scsi_cmnd->request_bufflen;
491 fcp_cmnd->fcpCntl3 = READ_DATA;
492 phba->fc4InputRequests++;
493 }
494 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
495 if (datadir == DMA_TO_DEVICE) {
496 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
497 iocb_cmd->un.fcpi.fcpi_parm = 0;
498 iocb_cmd->ulpPU = 0;
499 fcp_cmnd->fcpCntl3 = WRITE_DATA;
500 phba->fc4OutputRequests++;
501 } else {
502 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
503 iocb_cmd->ulpPU = PARM_READ_CHECK;
504 iocb_cmd->un.fcpi.fcpi_parm =
505 scsi_cmnd->request_bufflen;
506 fcp_cmnd->fcpCntl3 = READ_DATA;
507 phba->fc4InputRequests++;
508 }
509 } else {
510 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
511 iocb_cmd->un.fcpi.fcpi_parm = 0;
512 iocb_cmd->ulpPU = 0;
513 fcp_cmnd->fcpCntl3 = 0;
514 phba->fc4ControlRequests++;
515 }
516
517 /*
518 * Finish initializing those IOCB fields that are independent
519 * of the scsi_cmnd request_buffer
520 */
521 piocbq->iocb.ulpContext = pnode->nlp_rpi;
522 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
523 piocbq->iocb.ulpFCP2Rcvy = 1;
524
525 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
526 piocbq->context1 = lpfc_cmd;
527 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
528 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
529}
530
531static int
532lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
533 struct lpfc_scsi_buf *lpfc_cmd,
534 uint8_t task_mgmt_cmd)
535{
536 struct lpfc_sli *psli;
537 struct lpfc_iocbq *piocbq;
538 IOCB_t *piocb;
539 struct fcp_cmnd *fcp_cmnd;
540 struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
541 struct lpfc_rport_data *rdata = scsi_dev->hostdata;
542 struct lpfc_nodelist *ndlp = rdata->pnode;
543
544 if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
545 return 0;
546 }
547
548 psli = &phba->sli;
549 piocbq = &(lpfc_cmd->cur_iocbq);
550 piocb = &piocbq->iocb;
551
552 fcp_cmnd = lpfc_cmd->fcp_cmnd;
553 lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
554 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
555
556 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
557
558 piocb->ulpContext = ndlp->nlp_rpi;
559 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
560 piocb->ulpFCP2Rcvy = 1;
561 }
562 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
563
564 /* ulpTimeout is only one byte */
565 if (lpfc_cmd->timeout > 0xff) {
566 /*
567 * Do not timeout the command at the firmware level.
568 * The driver will provide the timeout mechanism.
569 */
570 piocb->ulpTimeout = 0;
571 } else {
572 piocb->ulpTimeout = lpfc_cmd->timeout;
573 }
574
575 lpfc_cmd->rdata = rdata;
576
577 switch (task_mgmt_cmd) {
578 case FCP_LUN_RESET:
579 /* Issue LUN Reset to TGT <num> LUN <num> */
580 lpfc_printf_log(phba,
581 KERN_INFO,
582 LOG_FCP,
583 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
584 "Data: x%x x%x\n",
585 phba->brd_no,
586 scsi_dev->id, scsi_dev->lun,
587 ndlp->nlp_rpi, ndlp->nlp_flag);
588
589 break;
590 case FCP_ABORT_TASK_SET:
591 /* Issue Abort Task Set to TGT <num> LUN <num> */
592 lpfc_printf_log(phba,
593 KERN_INFO,
594 LOG_FCP,
595 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
596 "Data: x%x x%x\n",
597 phba->brd_no,
598 scsi_dev->id, scsi_dev->lun,
599 ndlp->nlp_rpi, ndlp->nlp_flag);
600
601 break;
602 case FCP_TARGET_RESET:
603 /* Issue Target Reset to TGT <num> */
604 lpfc_printf_log(phba,
605 KERN_INFO,
606 LOG_FCP,
607 "%d:0702 Issue Target Reset to TGT %d "
608 "Data: x%x x%x\n",
609 phba->brd_no,
610 scsi_dev->id, ndlp->nlp_rpi,
611 ndlp->nlp_flag);
612 break;
613 }
614
615 return (1);
616}
617
618static int
619lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
620{
621 struct lpfc_iocbq *iocbq;
622 struct lpfc_iocbq *iocbqrsp = NULL;
623 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
624 int ret;
625
626 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
627 if (!ret)
628 return FAILED;
629
630 lpfc_cmd->scsi_hba = phba;
631 iocbq = &lpfc_cmd->cur_iocbq;
632 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
633 if (!iocbqrsp)
634 return FAILED;
635 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
636
637 iocbq->iocb_flag |= LPFC_IO_POLL;
638 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
639 &phba->sli.ring[phba->sli.fcp_ring],
640 iocbq, SLI_IOCB_HIGH_PRIORITY,
641 iocbqrsp,
642 lpfc_cmd->timeout);
643 if (ret != IOCB_SUCCESS) {
644 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
645 ret = FAILED;
646 } else {
647 ret = SUCCESS;
648 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
649 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
650 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
651 (lpfc_cmd->result & IOERR_DRVR_MASK))
652 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
653 }
654
655 /*
656 * All outstanding txcmplq I/Os should have been aborted by the target.
657 * Unfortunately, some targets do not abide by this forcing the driver
658 * to double check.
659 */
660 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
661 lpfc_cmd->pCmd->device->id,
662 lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
663
664 /* Return response IOCB to free list. */
665 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
666 return ret;
667}
668
669static void
670lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
671 struct lpfc_iocbq *pIocbOut)
672{
673 unsigned long iflag;
674 struct lpfc_scsi_buf *lpfc_cmd =
675 (struct lpfc_scsi_buf *) pIocbIn->context1;
676
677 spin_lock_irqsave(phba->host->host_lock, iflag);
678 lpfc_free_scsi_buf(lpfc_cmd);
679 spin_unlock_irqrestore(phba->host->host_lock, iflag);
680}
681
682static void
683lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
684 struct lpfc_iocbq *pIocbIn,
685 struct lpfc_iocbq *pIocbOut)
686{
687 struct scsi_cmnd *ml_cmd =
688 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
689
690 lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
691 ml_cmd->host_scribble = NULL;
692}
693
694const char *
695lpfc_info(struct Scsi_Host *host)
696{
697 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
698 int len;
699 static char lpfcinfobuf[384];
700
701 memset(lpfcinfobuf,0,384);
702 if (phba && phba->pcidev){
703 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
704 len = strlen(lpfcinfobuf);
705 snprintf(lpfcinfobuf + len,
706 384-len,
707 " on PCI bus %02x device %02x irq %d",
708 phba->pcidev->bus->number,
709 phba->pcidev->devfn,
710 phba->pcidev->irq);
711 len = strlen(lpfcinfobuf);
712 if (phba->Port[0]) {
713 snprintf(lpfcinfobuf + len,
714 384-len,
715 " port %s",
716 phba->Port);
717 }
718 }
719 return lpfcinfobuf;
720}
721
722static int
723lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
724{
725 struct lpfc_hba *phba =
726 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
727 struct lpfc_sli *psli = &phba->sli;
728 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
729 struct lpfc_nodelist *ndlp = rdata->pnode;
730 struct lpfc_scsi_buf *lpfc_cmd = NULL;
731 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
732 int err = 0;
733
734 /*
735 * The target pointer is guaranteed not to be NULL because the driver
736 * only clears the device->hostdata field in lpfc_slave_destroy. This
737 * approach guarantees no further IO calls on this target.
738 */
739 if (!ndlp) {
740 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
741 goto out_fail_command;
742 }
743
744 /*
745 * A Fibre Channel target is present and functioning only when the node
746 * state is MAPPED. Any other state is a failure.
747 */
748 if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
749 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
750 (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
751 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
752 goto out_fail_command;
753 }
754 /*
755 * The device is most likely recovered and the driver
756 * needs a bit more time to finish. Ask the midlayer
757 * to retry.
758 */
759 goto out_host_busy;
760 }
761
762 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
763 if (lpfc_cmd == NULL) {
764 printk(KERN_WARNING "%s: No buffer available - list empty, "
765 "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
766 goto out_host_busy;
767 }
768
769 /*
770 * Store the midlayer's command structure for the completion phase
771 * and complete the command initialization.
772 */
773 lpfc_cmd->pCmd = cmnd;
774 lpfc_cmd->rdata = rdata;
775 lpfc_cmd->timeout = 0;
776 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
777 cmnd->scsi_done = done;
778
779 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
780 if (err)
781 goto out_host_busy_free_buf;
782
783 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
784
785 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
786 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
787 if (err)
788 goto out_host_busy_free_buf;
789 return 0;
790
791 out_host_busy_free_buf:
792 lpfc_free_scsi_buf(lpfc_cmd);
793 cmnd->host_scribble = NULL;
794 out_host_busy:
795 return SCSI_MLQUEUE_HOST_BUSY;
796
797 out_fail_command:
798 done(cmnd);
799 return 0;
800}
801
802static int
8fa728a2 803__lpfc_abort_handler(struct scsi_cmnd *cmnd)
dea3101e 804{
805 struct lpfc_hba *phba =
806 (struct lpfc_hba *)cmnd->device->host->hostdata[0];
807 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
808 struct lpfc_iocbq *iocb, *next_iocb;
809 struct lpfc_iocbq *abtsiocb = NULL;
810 struct lpfc_scsi_buf *lpfc_cmd;
811 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
812 IOCB_t *cmd, *icmd;
813 unsigned long snum;
814 unsigned int id, lun;
815 unsigned int loop_count = 0;
816 int ret = IOCB_SUCCESS;
817
818 /*
819 * If the host_scribble data area is NULL, then the driver has already
820 * completed this command, but the midlayer did not see the completion
821 * before the eh fired. Just return SUCCESS.
822 */
823 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
824 if (!lpfc_cmd)
825 return SUCCESS;
826
827 /* save these now since lpfc_cmd can be freed */
828 id = lpfc_cmd->pCmd->device->id;
829 lun = lpfc_cmd->pCmd->device->lun;
830 snum = lpfc_cmd->pCmd->serial_number;
831
832 list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
833 cmd = &iocb->iocb;
834 if (iocb->context1 != lpfc_cmd)
835 continue;
836
837 list_del_init(&iocb->list);
838 pring->txq_cnt--;
839 if (!iocb->iocb_cmpl) {
840 list_add_tail(&iocb->list, lpfc_iocb_list);
841 }
842 else {
843 cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
844 cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
845 lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
846 }
847
848 goto out;
849 }
850
851 list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
852 if (abtsiocb == NULL)
853 return FAILED;
854
855 memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
856
857 /*
858 * The scsi command was not in the txq. Check the txcmplq and if it is
859 * found, send an abort to the FW.
860 */
861 list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
862 if (iocb->context1 != lpfc_cmd)
863 continue;
864
865 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
866 cmd = &iocb->iocb;
867 icmd = &abtsiocb->iocb;
868 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
869 icmd->un.acxri.abortContextTag = cmd->ulpContext;
870 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
871
872 icmd->ulpLe = 1;
873 icmd->ulpClass = cmd->ulpClass;
874 if (phba->hba_state >= LPFC_LINK_UP)
875 icmd->ulpCommand = CMD_ABORT_XRI_CN;
876 else
877 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
878
5eb95af0 879 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
dea3101e 880 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
881 IOCB_ERROR) {
882 list_add_tail(&abtsiocb->list, lpfc_iocb_list);
883 ret = IOCB_ERROR;
884 break;
885 }
886
887 /* Wait for abort to complete */
888 while (cmnd->host_scribble)
889 {
890 spin_unlock_irq(phba->host->host_lock);
891 set_current_state(TASK_UNINTERRUPTIBLE);
892 schedule_timeout(LPFC_ABORT_WAIT*HZ);
893 spin_lock_irq(phba->host->host_lock);
894 if (++loop_count
895 > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
896 break;
897 }
898
899 if(cmnd->host_scribble) {
900 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
901 "%d:0748 abort handler timed "
902 "out waiting for abort to "
903 "complete. Data: "
904 "x%x x%x x%x x%lx\n",
905 phba->brd_no, ret, id, lun, snum);
906 cmnd->host_scribble = NULL;
907 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
908 ret = IOCB_ERROR;
909 }
910
911 break;
912 }
913
914 out:
915 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
916 "%d:0749 SCSI layer issued abort device "
917 "Data: x%x x%x x%x x%lx\n",
918 phba->brd_no, ret, id, lun, snum);
919
920 return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
921}
922
8fa728a2
JG		 923static int
924lpfc_abort_handler(struct scsi_cmnd *cmnd)
925{
926 int rc;
927 spin_lock_irq(cmnd->device->host->host_lock);
928 rc = __lpfc_abort_handler(cmnd);
929 spin_unlock_irq(cmnd->device->host->host_lock);
930 return rc;
931}
932
dea3101e 933static int
94d0e7b8 934__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
dea3101e 935{
936 struct Scsi_Host *shost = cmnd->device->host;
937 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
938 struct lpfc_sli *psli = &phba->sli;
939 struct lpfc_scsi_buf *lpfc_cmd = NULL;
940 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
941 struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
942 struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
943 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
944 struct lpfc_nodelist *pnode = rdata->pnode;
945 int ret = FAILED;
946 int cnt, loopcnt;
947
948 /*
949 * If target is not in a MAPPED state, delay the reset until
950 * target is rediscovered or nodev timeout expires.
951 */
952 while ( 1 ) {
953 if (!pnode)
954 break;
955
956 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
957 spin_unlock_irq(phba->host->host_lock);
958 set_current_state(TASK_UNINTERRUPTIBLE);
959 schedule_timeout( HZ/2);
960 spin_lock_irq(phba->host->host_lock);
961 }
962 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
963 break;
964 }
965
966 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
967 if (lpfc_cmd == NULL)
968 goto out;
969
970 lpfc_cmd->pCmd = cmnd;
971 lpfc_cmd->timeout = 60;
972 lpfc_cmd->scsi_hba = phba;
973
974 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
975 if (!ret)
976 goto out_free_scsi_buf;
977
978 iocbq = &lpfc_cmd->cur_iocbq;
979
980 /* get a buffer for this IOCB command response */
981 list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
982 if (iocbqrsp == NULL)
983 goto out_free_scsi_buf;
984
985 memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
986
987 iocbq->iocb_flag |= LPFC_IO_POLL;
988 iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
989
990 ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
991 &phba->sli.ring[psli->fcp_ring],
992 iocbq, 0, iocbqrsp, 60);
993 if (ret == IOCB_SUCCESS)
994 ret = SUCCESS;
995
996 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
997 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
998 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
999 if (lpfc_cmd->result & IOERR_DRVR_MASK)
1000 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1001
1002 /*
1003 * All outstanding txcmplq I/Os should have been aborted by the target.
1004 * Unfortunately, some targets do not abide by this forcing the driver
1005 * to double check.
1006 */
1007 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1008 cmnd->device->id, cmnd->device->lun, 0,
1009 LPFC_CTX_LUN);
1010
1011 loopcnt = 0;
1012 while((cnt = lpfc_sli_sum_iocb(phba,
1013 &phba->sli.ring[phba->sli.fcp_ring],
1014 cmnd->device->id, cmnd->device->lun,
1015 LPFC_CTX_LUN))) {
1016 spin_unlock_irq(phba->host->host_lock);
1017 set_current_state(TASK_UNINTERRUPTIBLE);
1018 schedule_timeout(LPFC_RESET_WAIT*HZ);
1019 spin_lock_irq(phba->host->host_lock);
1020
1021 if (++loopcnt
1022 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1023 break;
1024 }
1025
1026 if (cnt) {
1027 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1028 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1029 phba->brd_no, cnt);
1030 }
1031
1032 list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1033
1034out_free_scsi_buf:
1035 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1036 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1037 "Data: x%x x%x x%x\n",
1038 phba->brd_no, lpfc_cmd->pCmd->device->id,
1039 lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1040 lpfc_cmd->result);
1041 lpfc_free_scsi_buf(lpfc_cmd);
1042out:
1043 return ret;
1044}
1045
94d0e7b8
JG		 1046static int
1047lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1048{
1049 int rc;
1050 spin_lock_irq(cmnd->device->host->host_lock);
1051 rc = __lpfc_reset_lun_handler(cmnd);
1052 spin_unlock_irq(cmnd->device->host->host_lock);
1053 return rc;
1054}
1055
dea3101e 1056/*
1057 * Note: midlayer calls this function with the host_lock held
1058 */
1059static int
68b3aa7c 1060__lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
dea3101e 1061{
1062 struct Scsi_Host *shost = cmnd->device->host;
1063 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1064 struct lpfc_nodelist *ndlp = NULL;
1065 int match;
1066 int ret = FAILED, i, err_count = 0;
1067 int cnt, loopcnt;
1068 unsigned int midlayer_id = 0;
1069 struct lpfc_scsi_buf * lpfc_cmd = NULL;
1070 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1071
1072 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1073 if (lpfc_cmd == NULL)
1074 goto out;
1075
1076 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1077 lpfc_cmd->timeout = 60;
1078 lpfc_cmd->pCmd = cmnd;
1079 lpfc_cmd->scsi_hba = phba;
1080
1081 /*
1082 * Since the driver manages a single bus device, reset all
1083 * targets known to the driver. Should any target reset
1084 * fail, this routine returns failure to the midlayer.
1085 */
1086 midlayer_id = cmnd->device->id;
1087 for (i = 0; i < MAX_FCP_TARGET; i++) {
1088 /* Search the mapped list for this target ID */
1089 match = 0;
1090 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1091 if ((i == ndlp->nlp_sid) && ndlp->rport) {
1092 match = 1;
1093 break;
1094 }
1095 }
1096 if (!match)
1097 continue;
1098
1099 lpfc_cmd->pCmd->device->id = i;
1100 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1101 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1102 if (ret != SUCCESS) {
1103 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1104 "%d:0713 Bus Reset on target %d failed\n",
1105 phba->brd_no, i);
1106 err_count++;
1107 }
1108 }
1109
1110 cmnd->device->id = midlayer_id;
1111 loopcnt = 0;
1112 while((cnt = lpfc_sli_sum_iocb(phba,
1113 &phba->sli.ring[phba->sli.fcp_ring],
1114 0, 0, LPFC_CTX_HOST))) {
1115 spin_unlock_irq(phba->host->host_lock);
1116 set_current_state(TASK_UNINTERRUPTIBLE);
1117 schedule_timeout(LPFC_RESET_WAIT*HZ);
1118 spin_lock_irq(phba->host->host_lock);
1119
1120 if (++loopcnt
1121 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1122 break;
1123 }
1124
1125 if (cnt) {
1126 /* flush all outstanding commands on the host */
1127 i = lpfc_sli_abort_iocb(phba,
1128 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1129 LPFC_CTX_HOST);
1130
1131 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1132 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1133 phba->brd_no, cnt, i);
1134 }
1135
1136 if (!err_count)
1137 ret = SUCCESS;
1138
1139 lpfc_free_scsi_buf(lpfc_cmd);
1140 lpfc_printf_log(phba,
1141 KERN_ERR,
1142 LOG_FCP,
1143 "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1144 phba->brd_no, ret);
1145out:
1146 return ret;
1147}
1148
68b3aa7c
JG		 1149static int
1150lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1151{
1152 int rc;
1153 spin_lock_irq(cmnd->device->host->host_lock);
1154 rc = __lpfc_reset_bus_handler(cmnd);
1155 spin_unlock_irq(cmnd->device->host->host_lock);
1156 return rc;
1157}
1158
dea3101e 1159static int
1160lpfc_slave_alloc(struct scsi_device *sdev)
1161{
1162 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1163 struct lpfc_nodelist *ndlp = NULL;
1164 int match = 0;
1165 struct lpfc_scsi_buf *scsi_buf = NULL;
1166 uint32_t total = 0, i;
1167 uint32_t num_to_alloc = 0;
1168 unsigned long flags;
1169 struct list_head *listp;
1170 struct list_head *node_list[6];
1171
1172 /*
1173 * Store the target pointer in the scsi_device hostdata pointer provided
1174 * the driver has already discovered the target id.
1175 */
1176
1177 /* Search the nlp lists other than unmap_list for this target ID */
1178 node_list[0] = &phba->fc_npr_list;
1179 node_list[1] = &phba->fc_nlpmap_list;
1180 node_list[2] = &phba->fc_prli_list;
1181 node_list[3] = &phba->fc_reglogin_list;
1182 node_list[4] = &phba->fc_adisc_list;
1183 node_list[5] = &phba->fc_plogi_list;
1184
1185 for (i = 0; i < 6 && !match; i++) {
1186 listp = node_list[i];
1187 if (list_empty(listp))
1188 continue;
1189 list_for_each_entry(ndlp, listp, nlp_listp) {
1190 if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1191 match = 1;
1192 break;
1193 }
1194 }
1195 }
1196
1197 if (!match)
1198 return -ENXIO;
1199
1200 sdev->hostdata = ndlp->rport->dd_data;
1201
1202 /*
1203 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1204 * available list of scsi buffers. Don't allocate more than the
1205 * HBA limit conveyed to the midlayer via the host structure. Note
1206 * that this list of scsi bufs exists for the lifetime of the driver.
1207 */
1208 total = phba->total_scsi_bufs;
1209 num_to_alloc = LPFC_CMD_PER_LUN;
1210 if (total >= phba->cfg_hba_queue_depth) {
1211 printk(KERN_WARNING "%s, At config limitation of "
1212 "%d allocated scsi_bufs\n", __FUNCTION__, total);
1213 return 0;
1214 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1215 num_to_alloc = phba->cfg_hba_queue_depth - total;
1216 }
1217
1218 for (i = 0; i < num_to_alloc; i++) {
1219 scsi_buf = lpfc_get_scsi_buf(phba);
1220 if (!scsi_buf) {
1221 printk(KERN_ERR "%s, failed to allocate "
1222 "scsi_buf\n", __FUNCTION__);
1223 break;
1224 }
1225
1226 spin_lock_irqsave(phba->host->host_lock, flags);
1227 phba->total_scsi_bufs++;
1228 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1229 spin_unlock_irqrestore(phba->host->host_lock, flags);
1230 }
1231 return 0;
1232}
1233
1234static int
1235lpfc_slave_configure(struct scsi_device *sdev)
1236{
1237 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1238 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1239
1240 if (sdev->tagged_supported)
1241 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1242 else
1243 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1244
1245 /*
1246 * Initialize the fc transport attributes for the target
1247 * containing this scsi device. Also note that the driver's
1248 * target pointer is stored in the starget_data for the
1249 * driver's sysfs entry point functions.
1250 */
1251 rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1252
1253 return 0;
1254}
1255
1256static void
1257lpfc_slave_destroy(struct scsi_device *sdev)
1258{
1259 sdev->hostdata = NULL;
1260 return;
1261}
1262
1263struct scsi_host_template lpfc_template = {
1264 .module = THIS_MODULE,
1265 .name = LPFC_DRIVER_NAME,
1266 .info = lpfc_info,
1267 .queuecommand = lpfc_queuecommand,
1268 .eh_abort_handler = lpfc_abort_handler,
1269 .eh_device_reset_handler= lpfc_reset_lun_handler,
1270 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1271 .slave_alloc = lpfc_slave_alloc,
1272 .slave_configure = lpfc_slave_configure,
1273 .slave_destroy = lpfc_slave_destroy,
1274 .this_id = -1,
1275 .sg_tablesize = LPFC_SG_SEG_CNT,
1276 .cmd_per_lun = LPFC_CMD_PER_LUN,
1277 .use_clustering = ENABLE_CLUSTERING,
1278 .shost_attrs = lpfc_host_attrs,
564b2960 1279 .max_sectors = 0xFFFF,
dea3101e 1280};
Linux 6.x block layer and io_uring tree(s)