projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] lpfc 8.1.7: Use mod_timer instead of add_timer in lpfc_els_timeout_handler
[linux-2.6-block.git] / drivers / scsi / lpfc / lpfc_scsi.c
CommitLineData
dea3101e 1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
c44ce173 3 * Fibre Channel Host Bus Adapters. *
0c6ac8ef 4 * Copyright (C) 2004-2006 Emulex. All rights reserved. *
c44ce173 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
dea3101e 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 */
52static struct lpfc_scsi_buf *
0bd4ca25 53lpfc_new_scsi_buf(struct lpfc_hba * phba)
dea3101e 54{
55 struct lpfc_scsi_buf *psb;
56 struct ulp_bde64 *bpl;
57 IOCB_t *iocb;
58 dma_addr_t pdma_phys;
604a3e30 59 uint16_t iotag;
dea3101e 60
61 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
62 if (!psb)
63 return NULL;
64 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
65 psb->scsi_hba = phba;
66
67 /*
68 * Get memory from the pci pool to map the virt space to pci bus space
69 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
70 * struct fcp_rsp and the number of bde's necessary to support the
71 * sg_tablesize.
72 */
73 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
74 &psb->dma_handle);
75 if (!psb->data) {
76 kfree(psb);
77 return NULL;
78 }
79
80 /* Initialize virtual ptrs to dma_buf region. */
81 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
82
604a3e30
JB		 83 /* Allocate iotag for psb->cur_iocbq. */
84 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
85 if (iotag == 0) {
86 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
87 psb->data, psb->dma_handle);
88 kfree (psb);
89 return NULL;
90 }
0bd4ca25 91 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
604a3e30 92
dea3101e 93 psb->fcp_cmnd = psb->data;
94 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
95 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
96 sizeof(struct fcp_rsp);
97
98 /* Initialize local short-hand pointers. */
99 bpl = psb->fcp_bpl;
100 pdma_phys = psb->dma_handle;
101
102 /*
103 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
104 * list bdes. Initialize the first two and leave the rest for
105 * queuecommand.
106 */
107 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
108 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
109 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
110 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
111 bpl->tus.w = le32_to_cpu(bpl->tus.w);
112 bpl++;
113
114 /* Setup the physical region for the FCP RSP */
115 pdma_phys += sizeof (struct fcp_cmnd);
116 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
117 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
118 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
119 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
120 bpl->tus.w = le32_to_cpu(bpl->tus.w);
121
122 /*
123 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
124 * initialize it with all known data now.
125 */
126 pdma_phys += (sizeof (struct fcp_rsp));
127 iocb = &psb->cur_iocbq.iocb;
128 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
129 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
130 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
131 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
132 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
133 iocb->ulpBdeCount = 1;
134 iocb->ulpClass = CLASS3;
135
136 return psb;
137}
138
455c53ec 139static struct lpfc_scsi_buf*
875fbdfe 140lpfc_get_scsi_buf(struct lpfc_hba * phba)
dea3101e 141{
0bd4ca25
JSEC		 142 struct lpfc_scsi_buf * lpfc_cmd = NULL;
143 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
875fbdfe 144 unsigned long iflag = 0;
0bd4ca25 145
875fbdfe 146 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
0bd4ca25 147 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
875fbdfe 148 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
0bd4ca25
JSEC		 149 return lpfc_cmd;
150}
dea3101e 151
0bd4ca25
JSEC		 152static void
153lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
154{
875fbdfe 155 unsigned long iflag = 0;
dea3101e 156 /*
157 * There are only two special cases to consider. (1) the scsi command
158 * requested scatter-gather usage or (2) the scsi command allocated
159 * a request buffer, but did not request use_sg. There is a third
160 * case, but it does not require resource deallocation.
161 */
162 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
163 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
164 psb->seg_cnt, psb->pCmd->sc_data_direction);
165 } else {
166 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
167 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
168 psb->pCmd->request_bufflen,
169 psb->pCmd->sc_data_direction);
170 }
171 }
172
875fbdfe 173 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
0bd4ca25 174 psb->pCmd = NULL;
dea3101e 175 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
875fbdfe 176 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
dea3101e 177}
178
179static int
180lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
181{
182 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
183 struct scatterlist *sgel = NULL;
184 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
185 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
186 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
187 dma_addr_t physaddr;
188 uint32_t i, num_bde = 0;
189 int datadir = scsi_cmnd->sc_data_direction;
190 int dma_error;
191
192 /*
193 * There are three possibilities here - use scatter-gather segment, use
194 * the single mapping, or neither. Start the lpfc command prep by
195 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
196 * data bde entry.
197 */
198 bpl += 2;
199 if (scsi_cmnd->use_sg) {
200 /*
201 * The driver stores the segment count returned from pci_map_sg
202 * because this a count of dma-mappings used to map the use_sg
203 * pages. They are not guaranteed to be the same for those
204 * architectures that implement an IOMMU.
205 */
206 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
207 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
208 scsi_cmnd->use_sg, datadir);
209 if (lpfc_cmd->seg_cnt == 0)
210 return 1;
211
212 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
213 printk(KERN_ERR "%s: Too many sg segments from "
214 "dma_map_sg. Config %d, seg_cnt %d",
215 __FUNCTION__, phba->cfg_sg_seg_cnt,
216 lpfc_cmd->seg_cnt);
217 dma_unmap_sg(&phba->pcidev->dev, sgel,
218 lpfc_cmd->seg_cnt, datadir);
219 return 1;
220 }
221
222 /*
223 * The driver established a maximum scatter-gather segment count
224 * during probe that limits the number of sg elements in any
225 * single scsi command. Just run through the seg_cnt and format
226 * the bde's.
227 */
228 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
229 physaddr = sg_dma_address(sgel);
230 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
231 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
232 bpl->tus.f.bdeSize = sg_dma_len(sgel);
233 if (datadir == DMA_TO_DEVICE)
234 bpl->tus.f.bdeFlags = 0;
235 else
236 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
237 bpl->tus.w = le32_to_cpu(bpl->tus.w);
238 bpl++;
239 sgel++;
240 num_bde++;
241 }
242 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
243 physaddr = dma_map_single(&phba->pcidev->dev,
244 scsi_cmnd->request_buffer,
245 scsi_cmnd->request_bufflen,
246 datadir);
247 dma_error = dma_mapping_error(physaddr);
248 if (dma_error) {
249 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
250 "%d:0718 Unable to dma_map_single "
251 "request_buffer: x%x\n",
252 phba->brd_no, dma_error);
253 return 1;
254 }
255
256 lpfc_cmd->nonsg_phys = physaddr;
257 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
258 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
259 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
260 if (datadir == DMA_TO_DEVICE)
261 bpl->tus.f.bdeFlags = 0;
483f05f0
JSEC		 262 else
263 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
dea3101e 264 bpl->tus.w = le32_to_cpu(bpl->tus.w);
265 num_bde = 1;
266 bpl++;
267 }
268
269 /*
270 * Finish initializing those IOCB fields that are dependent on the
483f05f0
JSEC		 271 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
272 * reinitialized since all iocb memory resources are used many times
273 * for transmit, receive, and continuation bpl's.
dea3101e 274 */
483f05f0 275 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
dea3101e 276 iocb_cmd->un.fcpi64.bdl.bdeSize +=
277 (num_bde * sizeof (struct ulp_bde64));
278 iocb_cmd->ulpBdeCount = 1;
279 iocb_cmd->ulpLe = 1;
280 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
281 return 0;
282}
283
284static void
285lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
286{
287 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
288 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
289 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
290 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
291 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
292 uint32_t resp_info = fcprsp->rspStatus2;
293 uint32_t scsi_status = fcprsp->rspStatus3;
294 uint32_t host_status = DID_OK;
295 uint32_t rsplen = 0;
296
297 /*
298 * If this is a task management command, there is no
299 * scsi packet associated with this lpfc_cmd. The driver
300 * consumes it.
301 */
302 if (fcpcmd->fcpCntl2) {
303 scsi_status = 0;
304 goto out;
305 }
306
307 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
308 "%d:0730 FCP command failed: RSP "
309 "Data: x%x x%x x%x x%x x%x x%x\n",
310 phba->brd_no, resp_info, scsi_status,
311 be32_to_cpu(fcprsp->rspResId),
312 be32_to_cpu(fcprsp->rspSnsLen),
313 be32_to_cpu(fcprsp->rspRspLen),
314 fcprsp->rspInfo3);
315
316 if (resp_info & RSP_LEN_VALID) {
317 rsplen = be32_to_cpu(fcprsp->rspRspLen);
318 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
319 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
320 host_status = DID_ERROR;
321 goto out;
322 }
323 }
324
325 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
326 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
327 if (snslen > SCSI_SENSE_BUFFERSIZE)
328 snslen = SCSI_SENSE_BUFFERSIZE;
329
330 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
331 }
332
333 cmnd->resid = 0;
334 if (resp_info & RESID_UNDER) {
335 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
336
337 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
338 "%d:0716 FCP Read Underrun, expected %d, "
339 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
340 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
341 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
342
343 /*
344 * The cmnd->underflow is the minimum number of bytes that must
345 * be transfered for this command. Provided a sense condition
346 * is not present, make sure the actual amount transferred is at
347 * least the underflow value or fail.
348 */
349 if (!(resp_info & SNS_LEN_VALID) &&
350 (scsi_status == SAM_STAT_GOOD) &&
351 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
352 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
353 "%d:0717 FCP command x%x residual "
354 "underrun converted to error "
355 "Data: x%x x%x x%x\n", phba->brd_no,
356 cmnd->cmnd[0], cmnd->request_bufflen,
357 cmnd->resid, cmnd->underflow);
358
359 host_status = DID_ERROR;
360 }
361 } else if (resp_info & RESID_OVER) {
362 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
363 "%d:0720 FCP command x%x residual "
364 "overrun error. Data: x%x x%x \n",
365 phba->brd_no, cmnd->cmnd[0],
366 cmnd->request_bufflen, cmnd->resid);
367 host_status = DID_ERROR;
368
369 /*
370 * Check SLI validation that all the transfer was actually done
371 * (fcpi_parm should be zero). Apply check only to reads.
372 */
373 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
374 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
375 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
376 "%d:0734 FCP Read Check Error Data: "
377 "x%x x%x x%x x%x\n", phba->brd_no,
378 be32_to_cpu(fcpcmd->fcpDl),
379 be32_to_cpu(fcprsp->rspResId),
380 fcpi_parm, cmnd->cmnd[0]);
381 host_status = DID_ERROR;
382 cmnd->resid = cmnd->request_bufflen;
383 }
384
385 out:
386 cmnd->result = ScsiResult(host_status, scsi_status);
387}
388
389static void
390lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
391 struct lpfc_iocbq *pIocbOut)
392{
393 struct lpfc_scsi_buf *lpfc_cmd =
394 (struct lpfc_scsi_buf *) pIocbIn->context1;
395 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
396 struct lpfc_nodelist *pnode = rdata->pnode;
397 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
445cf4f4
JSEC		 398 int result;
399 struct scsi_device *sdev, *tmp_sdev;
400 int depth = 0;
dea3101e 401
402 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
403 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
404
405 if (lpfc_cmd->status) {
406 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
407 (lpfc_cmd->result & IOERR_DRVR_MASK))
408 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
409 else if (lpfc_cmd->status >= IOSTAT_CNT)
410 lpfc_cmd->status = IOSTAT_DEFAULT;
411
412 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
413 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
414 "x%x result: x%x Data: x%x x%x\n",
415 phba->brd_no, cmd->cmnd[0], cmd->device->id,
416 cmd->device->lun, lpfc_cmd->status,
417 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
418 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
419
420 switch (lpfc_cmd->status) {
421 case IOSTAT_FCP_RSP_ERROR:
422 /* Call FCP RSP handler to determine result */
423 lpfc_handle_fcp_err(lpfc_cmd);
424 break;
425 case IOSTAT_NPORT_BSY:
426 case IOSTAT_FABRIC_BSY:
427 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
428 break;
429 default:
430 cmd->result = ScsiResult(DID_ERROR, 0);
431 break;
432 }
433
19a7b4ae
JSEC		 434 if ((pnode == NULL )
435 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
436 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
dea3101e 437 } else {
438 cmd->result = ScsiResult(DID_OK, 0);
439 }
440
441 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
442 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
443
444 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
445 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
446 "SNS x%x x%x Data: x%x x%x\n",
447 phba->brd_no, cmd->device->id,
448 cmd->device->lun, cmd, cmd->result,
449 *lp, *(lp + 3), cmd->retries, cmd->resid);
450 }
451
445cf4f4
JSEC		 452 result = cmd->result;
453 sdev = cmd->device;
0bd4ca25
JSEC		 454 cmd->scsi_done(cmd);
455
b808608b
JW		 456 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
457 lpfc_release_scsi_buf(phba, lpfc_cmd);
458 return;
459 }
460
0c6ac8ef 461 if (!result && pnode != NULL &&
445cf4f4
JSEC		 462 ((jiffies - pnode->last_ramp_up_time) >
463 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
464 ((jiffies - pnode->last_q_full_time) >
465 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
466 (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
467 shost_for_each_device(tmp_sdev, sdev->host) {
468 if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
469 if (tmp_sdev->id != sdev->id)
470 continue;
471 if (tmp_sdev->ordered_tags)
472 scsi_adjust_queue_depth(tmp_sdev,
473 MSG_ORDERED_TAG,
474 tmp_sdev->queue_depth+1);
475 else
476 scsi_adjust_queue_depth(tmp_sdev,
477 MSG_SIMPLE_TAG,
478 tmp_sdev->queue_depth+1);
479
480 pnode->last_ramp_up_time = jiffies;
481 }
482 }
483 }
484
485 /*
486 * Check for queue full. If the lun is reporting queue full, then
487 * back off the lun queue depth to prevent target overloads.
488 */
0c6ac8ef 489 if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
445cf4f4
JSEC		 490 pnode->last_q_full_time = jiffies;
491
492 shost_for_each_device(tmp_sdev, sdev->host) {
493 if (tmp_sdev->id != sdev->id)
494 continue;
495 depth = scsi_track_queue_full(tmp_sdev,
496 tmp_sdev->queue_depth - 1);
497 }
498 /*
499 * The queue depth cannot be lowered any more.
500 * Modify the returned error code to store
501 * the final depth value set by
502 * scsi_track_queue_full.
503 */
504 if (depth == -1)
505 depth = sdev->host->cmd_per_lun;
506
507 if (depth) {
508 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
509 "%d:0711 detected queue full - lun queue depth "
510 " adjusted to %d.\n", phba->brd_no, depth);
511 }
512 }
513
0bd4ca25 514 lpfc_release_scsi_buf(phba, lpfc_cmd);
dea3101e 515}
516
517static void
518lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
519 struct lpfc_nodelist *pnode)
520{
521 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
522 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
523 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
524 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
525 int datadir = scsi_cmnd->sc_data_direction;
526
527 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
69859dc4
JSEC		 528 /* clear task management bits */
529 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
dea3101e 530
91886523
JSEC		 531 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
532 &lpfc_cmd->fcp_cmnd->fcp_lun);
dea3101e 533
534 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
535
536 if (scsi_cmnd->device->tagged_supported) {
537 switch (scsi_cmnd->tag) {
538 case HEAD_OF_QUEUE_TAG:
539 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
540 break;
541 case ORDERED_QUEUE_TAG:
542 fcp_cmnd->fcpCntl1 = ORDERED_Q;
543 break;
544 default:
545 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
546 break;
547 }
548 } else
549 fcp_cmnd->fcpCntl1 = 0;
550
551 /*
552 * There are three possibilities here - use scatter-gather segment, use
553 * the single mapping, or neither. Start the lpfc command prep by
554 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
555 * data bde entry.
556 */
557 if (scsi_cmnd->use_sg) {
558 if (datadir == DMA_TO_DEVICE) {
559 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
560 iocb_cmd->un.fcpi.fcpi_parm = 0;
561 iocb_cmd->ulpPU = 0;
562 fcp_cmnd->fcpCntl3 = WRITE_DATA;
563 phba->fc4OutputRequests++;
564 } else {
565 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
566 iocb_cmd->ulpPU = PARM_READ_CHECK;
567 iocb_cmd->un.fcpi.fcpi_parm =
568 scsi_cmnd->request_bufflen;
569 fcp_cmnd->fcpCntl3 = READ_DATA;
570 phba->fc4InputRequests++;
571 }
572 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
573 if (datadir == DMA_TO_DEVICE) {
574 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
575 iocb_cmd->un.fcpi.fcpi_parm = 0;
576 iocb_cmd->ulpPU = 0;
577 fcp_cmnd->fcpCntl3 = WRITE_DATA;
578 phba->fc4OutputRequests++;
579 } else {
580 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
581 iocb_cmd->ulpPU = PARM_READ_CHECK;
582 iocb_cmd->un.fcpi.fcpi_parm =
583 scsi_cmnd->request_bufflen;
584 fcp_cmnd->fcpCntl3 = READ_DATA;
585 phba->fc4InputRequests++;
586 }
587 } else {
588 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
589 iocb_cmd->un.fcpi.fcpi_parm = 0;
590 iocb_cmd->ulpPU = 0;
591 fcp_cmnd->fcpCntl3 = 0;
592 phba->fc4ControlRequests++;
593 }
594
595 /*
596 * Finish initializing those IOCB fields that are independent
597 * of the scsi_cmnd request_buffer
598 */
599 piocbq->iocb.ulpContext = pnode->nlp_rpi;
600 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
601 piocbq->iocb.ulpFCP2Rcvy = 1;
602
603 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
604 piocbq->context1 = lpfc_cmd;
605 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
606 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
607}
608
609static int
610lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
611 struct lpfc_scsi_buf *lpfc_cmd,
612 uint8_t task_mgmt_cmd)
613{
614 struct lpfc_sli *psli;
615 struct lpfc_iocbq *piocbq;
616 IOCB_t *piocb;
617 struct fcp_cmnd *fcp_cmnd;
0b18ac42 618 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
dea3101e 619 struct lpfc_nodelist *ndlp = rdata->pnode;
620
19a7b4ae 621 if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
dea3101e 622 return 0;
623 }
624
625 psli = &phba->sli;
626 piocbq = &(lpfc_cmd->cur_iocbq);
627 piocb = &piocbq->iocb;
628
629 fcp_cmnd = lpfc_cmd->fcp_cmnd;
91886523
JSEC		 630 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
631 &lpfc_cmd->fcp_cmnd->fcp_lun);
dea3101e 632 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
633
634 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
635
636 piocb->ulpContext = ndlp->nlp_rpi;
637 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
638 piocb->ulpFCP2Rcvy = 1;
639 }
640 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
641
642 /* ulpTimeout is only one byte */
643 if (lpfc_cmd->timeout > 0xff) {
644 /*
645 * Do not timeout the command at the firmware level.
646 * The driver will provide the timeout mechanism.
647 */
648 piocb->ulpTimeout = 0;
649 } else {
650 piocb->ulpTimeout = lpfc_cmd->timeout;
651 }
652
dea3101e 653 return (1);
654}
655
656static int
0b18ac42
JS		 657lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
658 unsigned tgt_id, struct lpfc_rport_data *rdata)
dea3101e 659{
660 struct lpfc_iocbq *iocbq;
0bd4ca25 661 struct lpfc_iocbq *iocbqrsp;
dea3101e 662 int ret;
663
0b18ac42 664 lpfc_cmd->rdata = rdata;
dea3101e 665 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
666 if (!ret)
667 return FAILED;
668
669 lpfc_cmd->scsi_hba = phba;
670 iocbq = &lpfc_cmd->cur_iocbq;
0bd4ca25
JSEC		 671 iocbqrsp = lpfc_sli_get_iocbq(phba);
672
dea3101e 673 if (!iocbqrsp)
674 return FAILED;
dea3101e 675
0b18ac42
JS		 676 /* Issue Target Reset to TGT <num> */
677 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
678 "%d:0702 Issue Target Reset to TGT %d "
679 "Data: x%x x%x\n",
680 phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
681 rdata->pnode->nlp_flag);
682
68876920
JSEC		 683 ret = lpfc_sli_issue_iocb_wait(phba,
684 &phba->sli.ring[phba->sli.fcp_ring],
685 iocbq, iocbqrsp, lpfc_cmd->timeout);
dea3101e 686 if (ret != IOCB_SUCCESS) {
687 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
688 ret = FAILED;
689 } else {
690 ret = SUCCESS;
691 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
692 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
693 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
694 (lpfc_cmd->result & IOERR_DRVR_MASK))
695 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
696 }
697
604a3e30 698 lpfc_sli_release_iocbq(phba, iocbqrsp);
dea3101e 699 return ret;
700}
701
dea3101e 702const char *
703lpfc_info(struct Scsi_Host *host)
704{
7f0b5b19 705 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata;
dea3101e 706 int len;
707 static char lpfcinfobuf[384];
708
709 memset(lpfcinfobuf,0,384);
710 if (phba && phba->pcidev){
711 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
712 len = strlen(lpfcinfobuf);
713 snprintf(lpfcinfobuf + len,
714 384-len,
715 " on PCI bus %02x device %02x irq %d",
716 phba->pcidev->bus->number,
717 phba->pcidev->devfn,
718 phba->pcidev->irq);
719 len = strlen(lpfcinfobuf);
720 if (phba->Port[0]) {
721 snprintf(lpfcinfobuf + len,
722 384-len,
723 " port %s",
724 phba->Port);
725 }
726 }
727 return lpfcinfobuf;
728}
729
875fbdfe
JSEC		 730static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
731{
732 unsigned long poll_tmo_expires =
733 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
734
735 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
736 mod_timer(&phba->fcp_poll_timer,
737 poll_tmo_expires);
738}
739
740void lpfc_poll_start_timer(struct lpfc_hba * phba)
741{
742 lpfc_poll_rearm_timer(phba);
743}
744
745void lpfc_poll_timeout(unsigned long ptr)
746{
747 struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
748 unsigned long iflag;
749
750 spin_lock_irqsave(phba->host->host_lock, iflag);
751
752 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
753 lpfc_sli_poll_fcp_ring (phba);
754 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
755 lpfc_poll_rearm_timer(phba);
756 }
757
758 spin_unlock_irqrestore(phba->host->host_lock, iflag);
759}
760
dea3101e 761static int
762lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
763{
764 struct lpfc_hba *phba =
7f0b5b19 765 (struct lpfc_hba *) cmnd->device->host->hostdata;
dea3101e 766 struct lpfc_sli *psli = &phba->sli;
767 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
768 struct lpfc_nodelist *ndlp = rdata->pnode;
0bd4ca25 769 struct lpfc_scsi_buf *lpfc_cmd;
19a7b4ae 770 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
19a7b4ae 771 int err;
dea3101e 772
19a7b4ae
JSEC		 773 err = fc_remote_port_chkready(rport);
774 if (err) {
775 cmnd->result = err;
dea3101e 776 goto out_fail_command;
777 }
778
779 /*
19a7b4ae
JSEC		 780 * Catch race where our node has transitioned, but the
781 * transport is still transitioning.
dea3101e 782 */
19a7b4ae
JSEC		 783 if (!ndlp) {
784 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
785 goto out_fail_command;
dea3101e 786 }
875fbdfe 787 lpfc_cmd = lpfc_get_scsi_buf (phba);
dea3101e 788 if (lpfc_cmd == NULL) {
1de933f3
JSEC		 789 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
790 "%d:0707 driver's buffer pool is empty, "
791 "IO busied\n", phba->brd_no);
dea3101e 792 goto out_host_busy;
793 }
794
795 /*
796 * Store the midlayer's command structure for the completion phase
797 * and complete the command initialization.
798 */
799 lpfc_cmd->pCmd = cmnd;
800 lpfc_cmd->rdata = rdata;
801 lpfc_cmd->timeout = 0;
802 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
803 cmnd->scsi_done = done;
804
805 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
806 if (err)
807 goto out_host_busy_free_buf;
808
809 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
810
811 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
812 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
813 if (err)
814 goto out_host_busy_free_buf;
875fbdfe
JSEC		 815
816 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
817 lpfc_sli_poll_fcp_ring(phba);
818 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
819 lpfc_poll_rearm_timer(phba);
820 }
821
dea3101e 822 return 0;
823
824 out_host_busy_free_buf:
0bd4ca25 825 lpfc_release_scsi_buf(phba, lpfc_cmd);
dea3101e 826 out_host_busy:
827 return SCSI_MLQUEUE_HOST_BUSY;
828
829 out_fail_command:
830 done(cmnd);
831 return 0;
832}
833
63c59c3b 834
dea3101e 835static int
63c59c3b 836lpfc_abort_handler(struct scsi_cmnd *cmnd)
dea3101e 837{
63c59c3b 838 struct Scsi_Host *shost = cmnd->device->host;
7f0b5b19 839 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
dea3101e 840 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
0bd4ca25
JSEC		 841 struct lpfc_iocbq *iocb;
842 struct lpfc_iocbq *abtsiocb;
dea3101e 843 struct lpfc_scsi_buf *lpfc_cmd;
dea3101e 844 IOCB_t *cmd, *icmd;
dea3101e 845 unsigned int loop_count = 0;
0bd4ca25 846 int ret = SUCCESS;
dea3101e 847
63c59c3b 848 spin_lock_irq(shost->host_lock);
dea3101e 849
0bd4ca25
JSEC		 850 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
851 BUG_ON(!lpfc_cmd);
dea3101e 852
0bd4ca25
JSEC		 853 /*
854 * If pCmd field of the corresponding lpfc_scsi_buf structure
855 * points to a different SCSI command, then the driver has
856 * already completed this command, but the midlayer did not
857 * see the completion before the eh fired. Just return
858 * SUCCESS.
859 */
860 iocb = &lpfc_cmd->cur_iocbq;
861 if (lpfc_cmd->pCmd != cmnd)
862 goto out;
dea3101e 863
0bd4ca25 864 BUG_ON(iocb->context1 != lpfc_cmd);
dea3101e 865
0bd4ca25
JSEC		 866 abtsiocb = lpfc_sli_get_iocbq(phba);
867 if (abtsiocb == NULL) {
868 ret = FAILED;
dea3101e 869 goto out;
870 }
871
dea3101e 872 /*
0bd4ca25
JSEC		 873 * The scsi command can not be in txq and it is in flight because the
874 * pCmd is still pointig at the SCSI command we have to abort. There
875 * is no need to search the txcmplq. Just send an abort to the FW.
dea3101e 876 */
dea3101e 877
0bd4ca25
JSEC		 878 cmd = &iocb->iocb;
879 icmd = &abtsiocb->iocb;
880 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
881 icmd->un.acxri.abortContextTag = cmd->ulpContext;
882 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
dea3101e 883
0bd4ca25
JSEC		 884 icmd->ulpLe = 1;
885 icmd->ulpClass = cmd->ulpClass;
886 if (phba->hba_state >= LPFC_LINK_UP)
887 icmd->ulpCommand = CMD_ABORT_XRI_CN;
888 else
889 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
dea3101e 890
0bd4ca25
JSEC		 891 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
892 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
893 lpfc_sli_release_iocbq(phba, abtsiocb);
894 ret = FAILED;
895 goto out;
896 }
dea3101e 897
875fbdfe
JSEC		 898 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
899 lpfc_sli_poll_fcp_ring (phba);
900
0bd4ca25
JSEC		 901 /* Wait for abort to complete */
902 while (lpfc_cmd->pCmd == cmnd)
903 {
875fbdfe
JSEC		 904 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
905 lpfc_sli_poll_fcp_ring (phba);
906
0bd4ca25 907 spin_unlock_irq(phba->host->host_lock);
a9a3047d 908 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
0bd4ca25
JSEC		 909 spin_lock_irq(phba->host->host_lock);
910 if (++loop_count
911 > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
912 break;
913 }
dea3101e 914
0bd4ca25
JSEC		 915 if (lpfc_cmd->pCmd == cmnd) {
916 ret = FAILED;
917 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
918 "%d:0748 abort handler timed out waiting for "
919 "abort to complete: ret %#x, ID %d, LUN %d, "
920 "snum %#lx\n",
921 phba->brd_no, ret, cmnd->device->id,
922 cmnd->device->lun, cmnd->serial_number);
dea3101e 923 }
924
925 out:
926 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1de933f3
JSEC		 927 "%d:0749 SCSI Layer I/O Abort Request "
928 "Status x%x ID %d LUN %d snum %#lx\n",
0bd4ca25
JSEC		 929 phba->brd_no, ret, cmnd->device->id,
930 cmnd->device->lun, cmnd->serial_number);
dea3101e 931
63c59c3b 932 spin_unlock_irq(shost->host_lock);
dea3101e 933
63c59c3b 934 return ret;
8fa728a2
JG		 935}
936
dea3101e 937static int
63c59c3b 938lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
dea3101e 939{
940 struct Scsi_Host *shost = cmnd->device->host;
7f0b5b19 941 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
0bd4ca25
JSEC		 942 struct lpfc_scsi_buf *lpfc_cmd;
943 struct lpfc_iocbq *iocbq, *iocbqrsp;
dea3101e 944 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
945 struct lpfc_nodelist *pnode = rdata->pnode;
6175c02a 946 uint32_t cmd_result = 0, cmd_status = 0;
dea3101e 947 int ret = FAILED;
948 int cnt, loopcnt;
949
63c59c3b 950 spin_lock_irq(shost->host_lock);
dea3101e 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);
a9a3047d 961 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
dea3101e 962 spin_lock_irq(phba->host->host_lock);
963 }
964 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
965 break;
966 }
967
875fbdfe 968 lpfc_cmd = lpfc_get_scsi_buf (phba);
dea3101e 969 if (lpfc_cmd == NULL)
970 goto out;
971
972 lpfc_cmd->pCmd = cmnd;
973 lpfc_cmd->timeout = 60;
974 lpfc_cmd->scsi_hba = phba;
0b18ac42 975 lpfc_cmd->rdata = rdata;
dea3101e 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 */
0bd4ca25 984 iocbqrsp = lpfc_sli_get_iocbq(phba);
dea3101e 985 if (iocbqrsp == NULL)
986 goto out_free_scsi_buf;
987
0b18ac42
JS		 988 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
989 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
990 "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
991 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
992
68876920
JSEC		 993 ret = lpfc_sli_issue_iocb_wait(phba,
994 &phba->sli.ring[phba->sli.fcp_ring],
995 iocbq, iocbqrsp, lpfc_cmd->timeout);
dea3101e 996 if (ret == IOCB_SUCCESS)
997 ret = SUCCESS;
998
6175c02a
JSEC		 999
1000 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1001 cmd_status = iocbqrsp->iocb.ulpStatus;
1002
1003 lpfc_sli_release_iocbq(phba, iocbqrsp);
1004 lpfc_release_scsi_buf(phba, lpfc_cmd);
dea3101e 1005
1006 /*
6175c02a 1007 * All outstanding txcmplq I/Os should have been aborted by the device.
dea3101e 1008 * Unfortunately, some targets do not abide by this forcing the driver
1009 * to double check.
1010 */
6175c02a
JSEC		 1011 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1012 cmnd->device->id, cmnd->device->lun,
1013 LPFC_CTX_LUN);
1014 if (cnt)
1015 lpfc_sli_abort_iocb(phba,
1016 &phba->sli.ring[phba->sli.fcp_ring],
1017 cmnd->device->id, cmnd->device->lun,
1018 0, LPFC_CTX_LUN);
dea3101e 1019 loopcnt = 0;
6175c02a 1020 while(cnt) {
dea3101e 1021 spin_unlock_irq(phba->host->host_lock);
a9a3047d 1022 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
dea3101e 1023 spin_lock_irq(phba->host->host_lock);
1024
1025 if (++loopcnt
1026 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1027 break;
6175c02a
JSEC		 1028
1029 cnt = lpfc_sli_sum_iocb(phba,
1030 &phba->sli.ring[phba->sli.fcp_ring],
1031 cmnd->device->id, cmnd->device->lun,
1032 LPFC_CTX_LUN);
dea3101e 1033 }
1034
1035 if (cnt) {
0bd4ca25 1036 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
dea3101e 1037 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1038 phba->brd_no, cnt);
0bd4ca25 1039 ret = FAILED;
dea3101e 1040 }
1041
dea3101e 1042out_free_scsi_buf:
1043 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1044 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1045 "Data: x%x x%x x%x\n",
6175c02a
JSEC		 1046 phba->brd_no, cmnd->device->id,cmnd->device->lun,
1047 ret, cmd_status, cmd_result);
1048
dea3101e 1049out:
63c59c3b 1050 spin_unlock_irq(shost->host_lock);
dea3101e 1051 return ret;
1052}
1053
94d0e7b8 1054static int
63c59c3b 1055lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
dea3101e 1056{
1057 struct Scsi_Host *shost = cmnd->device->host;
7f0b5b19 1058 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
dea3101e 1059 struct lpfc_nodelist *ndlp = NULL;
1060 int match;
1061 int ret = FAILED, i, err_count = 0;
1062 int cnt, loopcnt;
0bd4ca25 1063 struct lpfc_scsi_buf * lpfc_cmd;
dea3101e 1064
63c59c3b
JSEC		 1065 spin_lock_irq(shost->host_lock);
1066
875fbdfe 1067 lpfc_cmd = lpfc_get_scsi_buf(phba);
dea3101e 1068 if (lpfc_cmd == NULL)
1069 goto out;
1070
1071 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1072 lpfc_cmd->timeout = 60;
1073 lpfc_cmd->pCmd = cmnd;
1074 lpfc_cmd->scsi_hba = phba;
1075
1076 /*
1077 * Since the driver manages a single bus device, reset all
1078 * targets known to the driver. Should any target reset
1079 * fail, this routine returns failure to the midlayer.
1080 */
dea3101e 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
0b18ac42
JS		 1093 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba,
1094 i, ndlp->rport->dd_data);
dea3101e 1095 if (ret != SUCCESS) {
6175c02a 1096 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
dea3101e 1097 "%d:0713 Bus Reset on target %d failed\n",
1098 phba->brd_no, i);
1099 err_count++;
1100 }
1101 }
1102
6175c02a
JSEC		 1103 if (err_count == 0)
1104 ret = SUCCESS;
1105
1106 lpfc_release_scsi_buf(phba, lpfc_cmd);
1107
1108 /*
1109 * All outstanding txcmplq I/Os should have been aborted by
1110 * the targets. Unfortunately, some targets do not abide by
1111 * this forcing the driver to double check.
1112 */
6175c02a
JSEC		 1113 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1114 0, 0, LPFC_CTX_HOST);
1115 if (cnt)
1116 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1117 0, 0, 0, LPFC_CTX_HOST);
dea3101e 1118 loopcnt = 0;
6175c02a 1119 while(cnt) {
dea3101e 1120 spin_unlock_irq(phba->host->host_lock);
a9a3047d 1121 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
dea3101e 1122 spin_lock_irq(phba->host->host_lock);
1123
1124 if (++loopcnt
1125 > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1126 break;
6175c02a
JSEC		 1127
1128 cnt = lpfc_sli_sum_iocb(phba,
1129 &phba->sli.ring[phba->sli.fcp_ring],
1130 0, 0, LPFC_CTX_HOST);
dea3101e 1131 }
1132
1133 if (cnt) {
6175c02a 1134 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
dea3101e 1135 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1136 phba->brd_no, cnt, i);
0bd4ca25 1137 ret = FAILED;
6175c02a 1138 }
dea3101e 1139
dea3101e 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:
63c59c3b 1146 spin_unlock_irq(shost->host_lock);
dea3101e 1147 return ret;
1148}
1149
1150static int
1151lpfc_slave_alloc(struct scsi_device *sdev)
1152{
7f0b5b19 1153 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
dea3101e 1154 struct lpfc_scsi_buf *scsi_buf = NULL;
19a7b4ae 1155 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
dea3101e 1156 uint32_t total = 0, i;
1157 uint32_t num_to_alloc = 0;
1158 unsigned long flags;
dea3101e 1159
19a7b4ae 1160 if (!rport || fc_remote_port_chkready(rport))
dea3101e 1161 return -ENXIO;
1162
19a7b4ae 1163 sdev->hostdata = rport->dd_data;
dea3101e 1164
1165 /*
1166 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1167 * available list of scsi buffers. Don't allocate more than the
a784efbf
JSEC		 1168 * HBA limit conveyed to the midlayer via the host structure. The
1169 * formula accounts for the lun_queue_depth + error handlers + 1
1170 * extra. This list of scsi bufs exists for the lifetime of the driver.
dea3101e 1171 */
1172 total = phba->total_scsi_bufs;
a784efbf 1173 num_to_alloc = phba->cfg_lun_queue_depth + 2;
dea3101e 1174 if (total >= phba->cfg_hba_queue_depth) {
a784efbf
JSEC		 1175 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1176 "%d:0704 At limitation of %d preallocated "
1177 "command buffers\n", phba->brd_no, total);
dea3101e 1178 return 0;
1179 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
a784efbf
JSEC		 1180 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1181 "%d:0705 Allocation request of %d command "
1182 "buffers will exceed max of %d. Reducing "
1183 "allocation request to %d.\n", phba->brd_no,
1184 num_to_alloc, phba->cfg_hba_queue_depth,
1185 (phba->cfg_hba_queue_depth - total));
dea3101e 1186 num_to_alloc = phba->cfg_hba_queue_depth - total;
1187 }
1188
1189 for (i = 0; i < num_to_alloc; i++) {
0bd4ca25 1190 scsi_buf = lpfc_new_scsi_buf(phba);
dea3101e 1191 if (!scsi_buf) {
a784efbf
JSEC		 1192 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1193 "%d:0706 Failed to allocate command "
1194 "buffer\n", phba->brd_no);
dea3101e 1195 break;
1196 }
1197
875fbdfe 1198 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
dea3101e 1199 phba->total_scsi_bufs++;
1200 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
875fbdfe 1201 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
dea3101e 1202 }
1203 return 0;
1204}
1205
1206static int
1207lpfc_slave_configure(struct scsi_device *sdev)
1208{
7f0b5b19 1209 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
dea3101e 1210 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1211
1212 if (sdev->tagged_supported)
1213 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1214 else
1215 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1216
1217 /*
1218 * Initialize the fc transport attributes for the target
1219 * containing this scsi device. Also note that the driver's
1220 * target pointer is stored in the starget_data for the
1221 * driver's sysfs entry point functions.
1222 */
1223 rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1224
875fbdfe
JSEC		 1225 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1226 lpfc_sli_poll_fcp_ring(phba);
1227 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1228 lpfc_poll_rearm_timer(phba);
1229 }
1230
dea3101e 1231 return 0;
1232}
1233
1234static void
1235lpfc_slave_destroy(struct scsi_device *sdev)
1236{
1237 sdev->hostdata = NULL;
1238 return;
1239}
1240
1241struct scsi_host_template lpfc_template = {
1242 .module = THIS_MODULE,
1243 .name = LPFC_DRIVER_NAME,
1244 .info = lpfc_info,
1245 .queuecommand = lpfc_queuecommand,
1246 .eh_abort_handler = lpfc_abort_handler,
1247 .eh_device_reset_handler= lpfc_reset_lun_handler,
1248 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1249 .slave_alloc = lpfc_slave_alloc,
1250 .slave_configure = lpfc_slave_configure,
1251 .slave_destroy = lpfc_slave_destroy,
1252 .this_id = -1,
1253 .sg_tablesize = LPFC_SG_SEG_CNT,
1254 .cmd_per_lun = LPFC_CMD_PER_LUN,
1255 .use_clustering = ENABLE_CLUSTERING,
1256 .shost_attrs = lpfc_host_attrs,
564b2960 1257 .max_sectors = 0xFFFF,
dea3101e 1258};
Linux 6.x block layer and io_uring tree(s)