dea3101e |
1 | /******************************************************************* |
2 | * This file is part of the Emulex Linux Device Driver for * |
3 | * Enterprise Fibre Channel Host Bus Adapters. * |
4 | * Refer to the README file included with this package for * |
5 | * driver version and adapter support. * |
6 | * Copyright (C) 2004 Emulex Corporation. * |
7 | * www.emulex.com * |
8 | * * |
9 | * This program is free software; you can redistribute it and/or * |
10 | * modify it under the terms of the GNU General Public License * |
11 | * as published by the Free Software Foundation; either version 2 * |
12 | * of the License, or (at your option) any later version. * |
13 | * * |
14 | * This program is distributed in the hope that it will be useful, * |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
17 | * GNU General Public License for more details, a copy of which * |
18 | * can be found in the file COPYING included with this package. * |
19 | *******************************************************************/ |
20 | |
21 | /* |
22 | * $Id: lpfc_scsi.c 1.37 2005/04/13 14:27:09EDT sf_support Exp $ |
23 | */ |
24 | |
25 | #include <linux/pci.h> |
26 | #include <linux/interrupt.h> |
27 | |
28 | #include <scsi/scsi.h> |
29 | #include <scsi/scsi_device.h> |
30 | #include <scsi/scsi_host.h> |
31 | #include <scsi/scsi_tcq.h> |
32 | #include <scsi/scsi_transport_fc.h> |
33 | |
34 | #include "lpfc_version.h" |
35 | #include "lpfc_hw.h" |
36 | #include "lpfc_sli.h" |
37 | #include "lpfc_disc.h" |
38 | #include "lpfc_scsi.h" |
39 | #include "lpfc.h" |
40 | #include "lpfc_logmsg.h" |
41 | #include "lpfc_crtn.h" |
42 | |
43 | #define LPFC_RESET_WAIT 2 |
44 | #define LPFC_ABORT_WAIT 2 |
45 | |
46 | static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun) |
47 | { |
48 | fcmd->fcpLunLsl = 0; |
49 | fcmd->fcpLunMsl = swab16((uint16_t)lun); |
50 | } |
51 | |
52 | /* |
53 | * This routine allocates a scsi buffer, which contains all the necessary |
54 | * information needed to initiate a SCSI I/O. The non-DMAable buffer region |
55 | * contains information to build the IOCB. The DMAable region contains |
56 | * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to |
57 | * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL |
58 | * and the BPL BDE is setup in the IOCB. |
59 | */ |
60 | static struct lpfc_scsi_buf * |
61 | lpfc_get_scsi_buf(struct lpfc_hba * phba) |
62 | { |
63 | struct lpfc_scsi_buf *psb; |
64 | struct ulp_bde64 *bpl; |
65 | IOCB_t *iocb; |
66 | dma_addr_t pdma_phys; |
67 | |
68 | psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); |
69 | if (!psb) |
70 | return NULL; |
71 | memset(psb, 0, sizeof (struct lpfc_scsi_buf)); |
72 | psb->scsi_hba = phba; |
73 | |
74 | /* |
75 | * Get memory from the pci pool to map the virt space to pci bus space |
76 | * for an I/O. The DMA buffer includes space for the struct fcp_cmnd, |
77 | * struct fcp_rsp and the number of bde's necessary to support the |
78 | * sg_tablesize. |
79 | */ |
80 | psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL, |
81 | &psb->dma_handle); |
82 | if (!psb->data) { |
83 | kfree(psb); |
84 | return NULL; |
85 | } |
86 | |
87 | /* Initialize virtual ptrs to dma_buf region. */ |
88 | memset(psb->data, 0, phba->cfg_sg_dma_buf_size); |
89 | |
90 | psb->fcp_cmnd = psb->data; |
91 | psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); |
92 | psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + |
93 | sizeof(struct fcp_rsp); |
94 | |
95 | /* Initialize local short-hand pointers. */ |
96 | bpl = psb->fcp_bpl; |
97 | pdma_phys = psb->dma_handle; |
98 | |
99 | /* |
100 | * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg |
101 | * list bdes. Initialize the first two and leave the rest for |
102 | * queuecommand. |
103 | */ |
104 | bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys)); |
105 | bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys)); |
106 | bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd); |
107 | bpl->tus.f.bdeFlags = BUFF_USE_CMND; |
108 | bpl->tus.w = le32_to_cpu(bpl->tus.w); |
109 | bpl++; |
110 | |
111 | /* Setup the physical region for the FCP RSP */ |
112 | pdma_phys += sizeof (struct fcp_cmnd); |
113 | bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys)); |
114 | bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys)); |
115 | bpl->tus.f.bdeSize = sizeof (struct fcp_rsp); |
116 | bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV); |
117 | bpl->tus.w = le32_to_cpu(bpl->tus.w); |
118 | |
119 | /* |
120 | * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf, |
121 | * initialize it with all known data now. |
122 | */ |
123 | pdma_phys += (sizeof (struct fcp_rsp)); |
124 | iocb = &psb->cur_iocbq.iocb; |
125 | iocb->un.fcpi64.bdl.ulpIoTag32 = 0; |
126 | iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys); |
127 | iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys); |
128 | iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64)); |
129 | iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL; |
130 | iocb->ulpBdeCount = 1; |
131 | iocb->ulpClass = CLASS3; |
132 | |
133 | return psb; |
134 | } |
135 | |
136 | static void |
137 | lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb) |
138 | { |
139 | struct lpfc_hba *phba = psb->scsi_hba; |
140 | |
141 | /* |
142 | * There are only two special cases to consider. (1) the scsi command |
143 | * requested scatter-gather usage or (2) the scsi command allocated |
144 | * a request buffer, but did not request use_sg. There is a third |
145 | * case, but it does not require resource deallocation. |
146 | */ |
147 | if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) { |
148 | dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer, |
149 | psb->seg_cnt, psb->pCmd->sc_data_direction); |
150 | } else { |
151 | if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) { |
152 | dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys, |
153 | psb->pCmd->request_bufflen, |
154 | psb->pCmd->sc_data_direction); |
155 | } |
156 | } |
157 | |
158 | list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); |
159 | } |
160 | |
161 | static int |
162 | lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd) |
163 | { |
164 | struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
165 | struct scatterlist *sgel = NULL; |
166 | struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
167 | struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; |
168 | IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
169 | dma_addr_t physaddr; |
170 | uint32_t i, num_bde = 0; |
171 | int datadir = scsi_cmnd->sc_data_direction; |
172 | int dma_error; |
173 | |
174 | /* |
175 | * There are three possibilities here - use scatter-gather segment, use |
176 | * the single mapping, or neither. Start the lpfc command prep by |
177 | * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first |
178 | * data bde entry. |
179 | */ |
180 | bpl += 2; |
181 | if (scsi_cmnd->use_sg) { |
182 | /* |
183 | * The driver stores the segment count returned from pci_map_sg |
184 | * because this a count of dma-mappings used to map the use_sg |
185 | * pages. They are not guaranteed to be the same for those |
186 | * architectures that implement an IOMMU. |
187 | */ |
188 | sgel = (struct scatterlist *)scsi_cmnd->request_buffer; |
189 | lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel, |
190 | scsi_cmnd->use_sg, datadir); |
191 | if (lpfc_cmd->seg_cnt == 0) |
192 | return 1; |
193 | |
194 | if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { |
195 | printk(KERN_ERR "%s: Too many sg segments from " |
196 | "dma_map_sg. Config %d, seg_cnt %d", |
197 | __FUNCTION__, phba->cfg_sg_seg_cnt, |
198 | lpfc_cmd->seg_cnt); |
199 | dma_unmap_sg(&phba->pcidev->dev, sgel, |
200 | lpfc_cmd->seg_cnt, datadir); |
201 | return 1; |
202 | } |
203 | |
204 | /* |
205 | * The driver established a maximum scatter-gather segment count |
206 | * during probe that limits the number of sg elements in any |
207 | * single scsi command. Just run through the seg_cnt and format |
208 | * the bde's. |
209 | */ |
210 | for (i = 0; i < lpfc_cmd->seg_cnt; i++) { |
211 | physaddr = sg_dma_address(sgel); |
212 | bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); |
213 | bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); |
214 | bpl->tus.f.bdeSize = sg_dma_len(sgel); |
215 | if (datadir == DMA_TO_DEVICE) |
216 | bpl->tus.f.bdeFlags = 0; |
217 | else |
218 | bpl->tus.f.bdeFlags = BUFF_USE_RCV; |
219 | bpl->tus.w = le32_to_cpu(bpl->tus.w); |
220 | bpl++; |
221 | sgel++; |
222 | num_bde++; |
223 | } |
224 | } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { |
225 | physaddr = dma_map_single(&phba->pcidev->dev, |
226 | scsi_cmnd->request_buffer, |
227 | scsi_cmnd->request_bufflen, |
228 | datadir); |
229 | dma_error = dma_mapping_error(physaddr); |
230 | if (dma_error) { |
231 | lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
232 | "%d:0718 Unable to dma_map_single " |
233 | "request_buffer: x%x\n", |
234 | phba->brd_no, dma_error); |
235 | return 1; |
236 | } |
237 | |
238 | lpfc_cmd->nonsg_phys = physaddr; |
239 | bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); |
240 | bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); |
241 | bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen; |
242 | if (datadir == DMA_TO_DEVICE) |
243 | bpl->tus.f.bdeFlags = 0; |
244 | bpl->tus.w = le32_to_cpu(bpl->tus.w); |
245 | num_bde = 1; |
246 | bpl++; |
247 | } |
248 | |
249 | /* |
250 | * Finish initializing those IOCB fields that are dependent on the |
251 | * scsi_cmnd request_buffer |
252 | */ |
253 | iocb_cmd->un.fcpi64.bdl.bdeSize += |
254 | (num_bde * sizeof (struct ulp_bde64)); |
255 | iocb_cmd->ulpBdeCount = 1; |
256 | iocb_cmd->ulpLe = 1; |
257 | fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen); |
258 | return 0; |
259 | } |
260 | |
261 | static void |
262 | lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd) |
263 | { |
264 | struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; |
265 | struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; |
266 | struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; |
267 | struct lpfc_hba *phba = lpfc_cmd->scsi_hba; |
268 | uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm; |
269 | uint32_t resp_info = fcprsp->rspStatus2; |
270 | uint32_t scsi_status = fcprsp->rspStatus3; |
271 | uint32_t host_status = DID_OK; |
272 | uint32_t rsplen = 0; |
273 | |
274 | /* |
275 | * If this is a task management command, there is no |
276 | * scsi packet associated with this lpfc_cmd. The driver |
277 | * consumes it. |
278 | */ |
279 | if (fcpcmd->fcpCntl2) { |
280 | scsi_status = 0; |
281 | goto out; |
282 | } |
283 | |
284 | lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
285 | "%d:0730 FCP command failed: RSP " |
286 | "Data: x%x x%x x%x x%x x%x x%x\n", |
287 | phba->brd_no, resp_info, scsi_status, |
288 | be32_to_cpu(fcprsp->rspResId), |
289 | be32_to_cpu(fcprsp->rspSnsLen), |
290 | be32_to_cpu(fcprsp->rspRspLen), |
291 | fcprsp->rspInfo3); |
292 | |
293 | if (resp_info & RSP_LEN_VALID) { |
294 | rsplen = be32_to_cpu(fcprsp->rspRspLen); |
295 | if ((rsplen != 0 && rsplen != 4 && rsplen != 8) || |
296 | (fcprsp->rspInfo3 != RSP_NO_FAILURE)) { |
297 | host_status = DID_ERROR; |
298 | goto out; |
299 | } |
300 | } |
301 | |
302 | if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { |
303 | uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); |
304 | if (snslen > SCSI_SENSE_BUFFERSIZE) |
305 | snslen = SCSI_SENSE_BUFFERSIZE; |
306 | |
307 | memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); |
308 | } |
309 | |
310 | cmnd->resid = 0; |
311 | if (resp_info & RESID_UNDER) { |
312 | cmnd->resid = be32_to_cpu(fcprsp->rspResId); |
313 | |
314 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
315 | "%d:0716 FCP Read Underrun, expected %d, " |
316 | "residual %d Data: x%x x%x x%x\n", phba->brd_no, |
317 | be32_to_cpu(fcpcmd->fcpDl), cmnd->resid, |
318 | fcpi_parm, cmnd->cmnd[0], cmnd->underflow); |
319 | |
320 | /* |
321 | * The cmnd->underflow is the minimum number of bytes that must |
322 | * be transfered for this command. Provided a sense condition |
323 | * is not present, make sure the actual amount transferred is at |
324 | * least the underflow value or fail. |
325 | */ |
326 | if (!(resp_info & SNS_LEN_VALID) && |
327 | (scsi_status == SAM_STAT_GOOD) && |
328 | (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) { |
329 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
330 | "%d:0717 FCP command x%x residual " |
331 | "underrun converted to error " |
332 | "Data: x%x x%x x%x\n", phba->brd_no, |
333 | cmnd->cmnd[0], cmnd->request_bufflen, |
334 | cmnd->resid, cmnd->underflow); |
335 | |
336 | host_status = DID_ERROR; |
337 | } |
338 | } else if (resp_info & RESID_OVER) { |
339 | lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
340 | "%d:0720 FCP command x%x residual " |
341 | "overrun error. Data: x%x x%x \n", |
342 | phba->brd_no, cmnd->cmnd[0], |
343 | cmnd->request_bufflen, cmnd->resid); |
344 | host_status = DID_ERROR; |
345 | |
346 | /* |
347 | * Check SLI validation that all the transfer was actually done |
348 | * (fcpi_parm should be zero). Apply check only to reads. |
349 | */ |
350 | } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm && |
351 | (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { |
352 | lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
353 | "%d:0734 FCP Read Check Error Data: " |
354 | "x%x x%x x%x x%x\n", phba->brd_no, |
355 | be32_to_cpu(fcpcmd->fcpDl), |
356 | be32_to_cpu(fcprsp->rspResId), |
357 | fcpi_parm, cmnd->cmnd[0]); |
358 | host_status = DID_ERROR; |
359 | cmnd->resid = cmnd->request_bufflen; |
360 | } |
361 | |
362 | out: |
363 | cmnd->result = ScsiResult(host_status, scsi_status); |
364 | } |
365 | |
366 | static void |
367 | lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, |
368 | struct lpfc_iocbq *pIocbOut) |
369 | { |
370 | struct lpfc_scsi_buf *lpfc_cmd = |
371 | (struct lpfc_scsi_buf *) pIocbIn->context1; |
372 | struct lpfc_rport_data *rdata = lpfc_cmd->rdata; |
373 | struct lpfc_nodelist *pnode = rdata->pnode; |
374 | struct scsi_cmnd *cmd = lpfc_cmd->pCmd; |
375 | unsigned long iflag; |
376 | |
377 | lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; |
378 | lpfc_cmd->status = pIocbOut->iocb.ulpStatus; |
379 | |
380 | if (lpfc_cmd->status) { |
381 | if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && |
382 | (lpfc_cmd->result & IOERR_DRVR_MASK)) |
383 | lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
384 | else if (lpfc_cmd->status >= IOSTAT_CNT) |
385 | lpfc_cmd->status = IOSTAT_DEFAULT; |
386 | |
387 | lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
388 | "%d:0729 FCP cmd x%x failed <%d/%d> status: " |
389 | "x%x result: x%x Data: x%x x%x\n", |
390 | phba->brd_no, cmd->cmnd[0], cmd->device->id, |
391 | cmd->device->lun, lpfc_cmd->status, |
392 | lpfc_cmd->result, pIocbOut->iocb.ulpContext, |
393 | lpfc_cmd->cur_iocbq.iocb.ulpIoTag); |
394 | |
395 | switch (lpfc_cmd->status) { |
396 | case IOSTAT_FCP_RSP_ERROR: |
397 | /* Call FCP RSP handler to determine result */ |
398 | lpfc_handle_fcp_err(lpfc_cmd); |
399 | break; |
400 | case IOSTAT_NPORT_BSY: |
401 | case IOSTAT_FABRIC_BSY: |
402 | cmd->result = ScsiResult(DID_BUS_BUSY, 0); |
403 | break; |
404 | default: |
405 | cmd->result = ScsiResult(DID_ERROR, 0); |
406 | break; |
407 | } |
408 | |
409 | if (pnode) { |
410 | if (pnode->nlp_state != NLP_STE_MAPPED_NODE) |
411 | cmd->result = ScsiResult(DID_BUS_BUSY, |
412 | SAM_STAT_BUSY); |
413 | } |
414 | else { |
415 | cmd->result = ScsiResult(DID_NO_CONNECT, 0); |
416 | } |
417 | } else { |
418 | cmd->result = ScsiResult(DID_OK, 0); |
419 | } |
420 | |
421 | if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { |
422 | uint32_t *lp = (uint32_t *)cmd->sense_buffer; |
423 | |
424 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
425 | "%d:0710 Iodone <%d/%d> cmd %p, error x%x " |
426 | "SNS x%x x%x Data: x%x x%x\n", |
427 | phba->brd_no, cmd->device->id, |
428 | cmd->device->lun, cmd, cmd->result, |
429 | *lp, *(lp + 3), cmd->retries, cmd->resid); |
430 | } |
431 | |
432 | spin_lock_irqsave(phba->host->host_lock, iflag); |
433 | lpfc_free_scsi_buf(lpfc_cmd); |
434 | cmd->host_scribble = NULL; |
435 | spin_unlock_irqrestore(phba->host->host_lock, iflag); |
436 | |
437 | cmd->scsi_done(cmd); |
438 | } |
439 | |
440 | static void |
441 | lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd, |
442 | struct lpfc_nodelist *pnode) |
443 | { |
444 | struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
445 | struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
446 | IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
447 | struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); |
448 | int datadir = scsi_cmnd->sc_data_direction; |
449 | |
450 | lpfc_cmd->fcp_rsp->rspSnsLen = 0; |
451 | |
452 | lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 | lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun); |
552 | fcp_cmnd->fcpCntl2 = task_mgmt_cmd; |
553 | |
554 | piocb->ulpCommand = CMD_FCP_ICMND64_CR; |
555 | |
556 | piocb->ulpContext = ndlp->nlp_rpi; |
557 | if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { |
558 | piocb->ulpFCP2Rcvy = 1; |
559 | } |
560 | piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); |
561 | |
562 | /* ulpTimeout is only one byte */ |
563 | if (lpfc_cmd->timeout > 0xff) { |
564 | /* |
565 | * Do not timeout the command at the firmware level. |
566 | * The driver will provide the timeout mechanism. |
567 | */ |
568 | piocb->ulpTimeout = 0; |
569 | } else { |
570 | piocb->ulpTimeout = lpfc_cmd->timeout; |
571 | } |
572 | |
573 | lpfc_cmd->rdata = rdata; |
574 | |
575 | switch (task_mgmt_cmd) { |
576 | case FCP_LUN_RESET: |
577 | /* Issue LUN Reset to TGT <num> LUN <num> */ |
578 | lpfc_printf_log(phba, |
579 | KERN_INFO, |
580 | LOG_FCP, |
581 | "%d:0703 Issue LUN Reset to TGT %d LUN %d " |
582 | "Data: x%x x%x\n", |
583 | phba->brd_no, |
584 | scsi_dev->id, scsi_dev->lun, |
585 | ndlp->nlp_rpi, ndlp->nlp_flag); |
586 | |
587 | break; |
588 | case FCP_ABORT_TASK_SET: |
589 | /* Issue Abort Task Set to TGT <num> LUN <num> */ |
590 | lpfc_printf_log(phba, |
591 | KERN_INFO, |
592 | LOG_FCP, |
593 | "%d:0701 Issue Abort Task Set to TGT %d LUN %d " |
594 | "Data: x%x x%x\n", |
595 | phba->brd_no, |
596 | scsi_dev->id, scsi_dev->lun, |
597 | ndlp->nlp_rpi, ndlp->nlp_flag); |
598 | |
599 | break; |
600 | case FCP_TARGET_RESET: |
601 | /* Issue Target Reset to TGT <num> */ |
602 | lpfc_printf_log(phba, |
603 | KERN_INFO, |
604 | LOG_FCP, |
605 | "%d:0702 Issue Target Reset to TGT %d " |
606 | "Data: x%x x%x\n", |
607 | phba->brd_no, |
608 | scsi_dev->id, ndlp->nlp_rpi, |
609 | ndlp->nlp_flag); |
610 | break; |
611 | } |
612 | |
613 | return (1); |
614 | } |
615 | |
616 | static int |
617 | lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba) |
618 | { |
619 | struct lpfc_iocbq *iocbq; |
620 | struct lpfc_iocbq *iocbqrsp = NULL; |
621 | struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list; |
622 | int ret; |
623 | |
624 | ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET); |
625 | if (!ret) |
626 | return FAILED; |
627 | |
628 | lpfc_cmd->scsi_hba = phba; |
629 | iocbq = &lpfc_cmd->cur_iocbq; |
630 | list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list); |
631 | if (!iocbqrsp) |
632 | return FAILED; |
633 | memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq)); |
634 | |
635 | iocbq->iocb_flag |= LPFC_IO_POLL; |
636 | ret = lpfc_sli_issue_iocb_wait_high_priority(phba, |
637 | &phba->sli.ring[phba->sli.fcp_ring], |
638 | iocbq, SLI_IOCB_HIGH_PRIORITY, |
639 | iocbqrsp, |
640 | lpfc_cmd->timeout); |
641 | if (ret != IOCB_SUCCESS) { |
642 | lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
643 | ret = FAILED; |
644 | } else { |
645 | ret = SUCCESS; |
646 | lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; |
647 | lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; |
648 | if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && |
649 | (lpfc_cmd->result & IOERR_DRVR_MASK)) |
650 | lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
651 | } |
652 | |
653 | /* |
654 | * All outstanding txcmplq I/Os should have been aborted by the target. |
655 | * Unfortunately, some targets do not abide by this forcing the driver |
656 | * to double check. |
657 | */ |
658 | lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], |
659 | lpfc_cmd->pCmd->device->id, |
660 | lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT); |
661 | |
662 | /* Return response IOCB to free list. */ |
663 | list_add_tail(&iocbqrsp->list, lpfc_iocb_list); |
664 | return ret; |
665 | } |
666 | |
667 | static void |
668 | lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, |
669 | struct lpfc_iocbq *pIocbOut) |
670 | { |
671 | unsigned long iflag; |
672 | struct lpfc_scsi_buf *lpfc_cmd = |
673 | (struct lpfc_scsi_buf *) pIocbIn->context1; |
674 | |
675 | spin_lock_irqsave(phba->host->host_lock, iflag); |
676 | lpfc_free_scsi_buf(lpfc_cmd); |
677 | spin_unlock_irqrestore(phba->host->host_lock, iflag); |
678 | } |
679 | |
680 | static void |
681 | lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba, |
682 | struct lpfc_iocbq *pIocbIn, |
683 | struct lpfc_iocbq *pIocbOut) |
684 | { |
685 | struct scsi_cmnd *ml_cmd = |
686 | ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd; |
687 | |
688 | lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut); |
689 | ml_cmd->host_scribble = NULL; |
690 | } |
691 | |
692 | const char * |
693 | lpfc_info(struct Scsi_Host *host) |
694 | { |
695 | struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0]; |
696 | int len; |
697 | static char lpfcinfobuf[384]; |
698 | |
699 | memset(lpfcinfobuf,0,384); |
700 | if (phba && phba->pcidev){ |
701 | strncpy(lpfcinfobuf, phba->ModelDesc, 256); |
702 | len = strlen(lpfcinfobuf); |
703 | snprintf(lpfcinfobuf + len, |
704 | 384-len, |
705 | " on PCI bus %02x device %02x irq %d", |
706 | phba->pcidev->bus->number, |
707 | phba->pcidev->devfn, |
708 | phba->pcidev->irq); |
709 | len = strlen(lpfcinfobuf); |
710 | if (phba->Port[0]) { |
711 | snprintf(lpfcinfobuf + len, |
712 | 384-len, |
713 | " port %s", |
714 | phba->Port); |
715 | } |
716 | } |
717 | return lpfcinfobuf; |
718 | } |
719 | |
720 | static int |
721 | lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) |
722 | { |
723 | struct lpfc_hba *phba = |
724 | (struct lpfc_hba *) cmnd->device->host->hostdata[0]; |
725 | struct lpfc_sli *psli = &phba->sli; |
726 | struct lpfc_rport_data *rdata = cmnd->device->hostdata; |
727 | struct lpfc_nodelist *ndlp = rdata->pnode; |
728 | struct lpfc_scsi_buf *lpfc_cmd = NULL; |
729 | struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; |
730 | int err = 0; |
731 | |
732 | /* |
733 | * The target pointer is guaranteed not to be NULL because the driver |
734 | * only clears the device->hostdata field in lpfc_slave_destroy. This |
735 | * approach guarantees no further IO calls on this target. |
736 | */ |
737 | if (!ndlp) { |
738 | cmnd->result = ScsiResult(DID_NO_CONNECT, 0); |
739 | goto out_fail_command; |
740 | } |
741 | |
742 | /* |
743 | * A Fibre Channel target is present and functioning only when the node |
744 | * state is MAPPED. Any other state is a failure. |
745 | */ |
746 | if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) { |
747 | if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) || |
748 | (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) { |
749 | cmnd->result = ScsiResult(DID_NO_CONNECT, 0); |
750 | goto out_fail_command; |
751 | } |
752 | /* |
753 | * The device is most likely recovered and the driver |
754 | * needs a bit more time to finish. Ask the midlayer |
755 | * to retry. |
756 | */ |
757 | goto out_host_busy; |
758 | } |
759 | |
760 | list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); |
761 | if (lpfc_cmd == NULL) { |
762 | printk(KERN_WARNING "%s: No buffer available - list empty, " |
763 | "total count %d\n", __FUNCTION__, phba->total_scsi_bufs); |
764 | goto out_host_busy; |
765 | } |
766 | |
767 | /* |
768 | * Store the midlayer's command structure for the completion phase |
769 | * and complete the command initialization. |
770 | */ |
771 | lpfc_cmd->pCmd = cmnd; |
772 | lpfc_cmd->rdata = rdata; |
773 | lpfc_cmd->timeout = 0; |
774 | cmnd->host_scribble = (unsigned char *)lpfc_cmd; |
775 | cmnd->scsi_done = done; |
776 | |
777 | err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); |
778 | if (err) |
779 | goto out_host_busy_free_buf; |
780 | |
781 | lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp); |
782 | |
783 | err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring], |
784 | &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); |
785 | if (err) |
786 | goto out_host_busy_free_buf; |
787 | return 0; |
788 | |
789 | out_host_busy_free_buf: |
790 | lpfc_free_scsi_buf(lpfc_cmd); |
791 | cmnd->host_scribble = NULL; |
792 | out_host_busy: |
793 | return SCSI_MLQUEUE_HOST_BUSY; |
794 | |
795 | out_fail_command: |
796 | done(cmnd); |
797 | return 0; |
798 | } |
799 | |
800 | static int |
801 | lpfc_abort_handler(struct scsi_cmnd *cmnd) |
802 | { |
803 | struct lpfc_hba *phba = |
804 | (struct lpfc_hba *)cmnd->device->host->hostdata[0]; |
805 | struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring]; |
806 | struct lpfc_iocbq *iocb, *next_iocb; |
807 | struct lpfc_iocbq *abtsiocb = NULL; |
808 | struct lpfc_scsi_buf *lpfc_cmd; |
809 | struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list; |
810 | IOCB_t *cmd, *icmd; |
811 | unsigned long snum; |
812 | unsigned int id, lun; |
813 | unsigned int loop_count = 0; |
814 | int ret = IOCB_SUCCESS; |
815 | |
816 | /* |
817 | * If the host_scribble data area is NULL, then the driver has already |
818 | * completed this command, but the midlayer did not see the completion |
819 | * before the eh fired. Just return SUCCESS. |
820 | */ |
821 | lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; |
822 | if (!lpfc_cmd) |
823 | return SUCCESS; |
824 | |
825 | /* save these now since lpfc_cmd can be freed */ |
826 | id = lpfc_cmd->pCmd->device->id; |
827 | lun = lpfc_cmd->pCmd->device->lun; |
828 | snum = lpfc_cmd->pCmd->serial_number; |
829 | |
830 | list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) { |
831 | cmd = &iocb->iocb; |
832 | if (iocb->context1 != lpfc_cmd) |
833 | continue; |
834 | |
835 | list_del_init(&iocb->list); |
836 | pring->txq_cnt--; |
837 | if (!iocb->iocb_cmpl) { |
838 | list_add_tail(&iocb->list, lpfc_iocb_list); |
839 | } |
840 | else { |
841 | cmd->ulpStatus = IOSTAT_LOCAL_REJECT; |
842 | cmd->un.ulpWord[4] = IOERR_SLI_ABORTED; |
843 | lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb); |
844 | } |
845 | |
846 | goto out; |
847 | } |
848 | |
849 | list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list); |
850 | if (abtsiocb == NULL) |
851 | return FAILED; |
852 | |
853 | memset(abtsiocb, 0, sizeof (struct lpfc_iocbq)); |
854 | |
855 | /* |
856 | * The scsi command was not in the txq. Check the txcmplq and if it is |
857 | * found, send an abort to the FW. |
858 | */ |
859 | list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) { |
860 | if (iocb->context1 != lpfc_cmd) |
861 | continue; |
862 | |
863 | iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted; |
864 | cmd = &iocb->iocb; |
865 | icmd = &abtsiocb->iocb; |
866 | icmd->un.acxri.abortType = ABORT_TYPE_ABTS; |
867 | icmd->un.acxri.abortContextTag = cmd->ulpContext; |
868 | icmd->un.acxri.abortIoTag = cmd->ulpIoTag; |
869 | |
870 | icmd->ulpLe = 1; |
871 | icmd->ulpClass = cmd->ulpClass; |
872 | if (phba->hba_state >= LPFC_LINK_UP) |
873 | icmd->ulpCommand = CMD_ABORT_XRI_CN; |
874 | else |
875 | icmd->ulpCommand = CMD_CLOSE_XRI_CN; |
876 | |
877 | if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == |
878 | IOCB_ERROR) { |
879 | list_add_tail(&abtsiocb->list, lpfc_iocb_list); |
880 | ret = IOCB_ERROR; |
881 | break; |
882 | } |
883 | |
884 | /* Wait for abort to complete */ |
885 | while (cmnd->host_scribble) |
886 | { |
887 | spin_unlock_irq(phba->host->host_lock); |
888 | set_current_state(TASK_UNINTERRUPTIBLE); |
889 | schedule_timeout(LPFC_ABORT_WAIT*HZ); |
890 | spin_lock_irq(phba->host->host_lock); |
891 | if (++loop_count |
892 | > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT) |
893 | break; |
894 | } |
895 | |
896 | if(cmnd->host_scribble) { |
897 | lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
898 | "%d:0748 abort handler timed " |
899 | "out waiting for abort to " |
900 | "complete. Data: " |
901 | "x%x x%x x%x x%lx\n", |
902 | phba->brd_no, ret, id, lun, snum); |
903 | cmnd->host_scribble = NULL; |
904 | iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup; |
905 | ret = IOCB_ERROR; |
906 | } |
907 | |
908 | break; |
909 | } |
910 | |
911 | out: |
912 | lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
913 | "%d:0749 SCSI layer issued abort device " |
914 | "Data: x%x x%x x%x x%lx\n", |
915 | phba->brd_no, ret, id, lun, snum); |
916 | |
917 | return ret == IOCB_SUCCESS ? SUCCESS : FAILED; |
918 | } |
919 | |
920 | static int |
921 | lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) |
922 | { |
923 | struct Scsi_Host *shost = cmnd->device->host; |
924 | struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; |
925 | struct lpfc_sli *psli = &phba->sli; |
926 | struct lpfc_scsi_buf *lpfc_cmd = NULL; |
927 | struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; |
928 | struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list; |
929 | struct lpfc_iocbq *iocbq, *iocbqrsp = NULL; |
930 | struct lpfc_rport_data *rdata = cmnd->device->hostdata; |
931 | struct lpfc_nodelist *pnode = rdata->pnode; |
932 | int ret = FAILED; |
933 | int cnt, loopcnt; |
934 | |
935 | /* |
936 | * If target is not in a MAPPED state, delay the reset until |
937 | * target is rediscovered or nodev timeout expires. |
938 | */ |
939 | while ( 1 ) { |
940 | if (!pnode) |
941 | break; |
942 | |
943 | if (pnode->nlp_state != NLP_STE_MAPPED_NODE) { |
944 | spin_unlock_irq(phba->host->host_lock); |
945 | set_current_state(TASK_UNINTERRUPTIBLE); |
946 | schedule_timeout( HZ/2); |
947 | spin_lock_irq(phba->host->host_lock); |
948 | } |
949 | if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE)) |
950 | break; |
951 | } |
952 | |
953 | list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); |
954 | if (lpfc_cmd == NULL) |
955 | goto out; |
956 | |
957 | lpfc_cmd->pCmd = cmnd; |
958 | lpfc_cmd->timeout = 60; |
959 | lpfc_cmd->scsi_hba = phba; |
960 | |
961 | ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET); |
962 | if (!ret) |
963 | goto out_free_scsi_buf; |
964 | |
965 | iocbq = &lpfc_cmd->cur_iocbq; |
966 | |
967 | /* get a buffer for this IOCB command response */ |
968 | list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list); |
969 | if (iocbqrsp == NULL) |
970 | goto out_free_scsi_buf; |
971 | |
972 | memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq)); |
973 | |
974 | iocbq->iocb_flag |= LPFC_IO_POLL; |
975 | iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority; |
976 | |
977 | ret = lpfc_sli_issue_iocb_wait_high_priority(phba, |
978 | &phba->sli.ring[psli->fcp_ring], |
979 | iocbq, 0, iocbqrsp, 60); |
980 | if (ret == IOCB_SUCCESS) |
981 | ret = SUCCESS; |
982 | |
983 | lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; |
984 | lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; |
985 | if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT) |
986 | if (lpfc_cmd->result & IOERR_DRVR_MASK) |
987 | lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
988 | |
989 | /* |
990 | * All outstanding txcmplq I/Os should have been aborted by the target. |
991 | * Unfortunately, some targets do not abide by this forcing the driver |
992 | * to double check. |
993 | */ |
994 | lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], |
995 | cmnd->device->id, cmnd->device->lun, 0, |
996 | LPFC_CTX_LUN); |
997 | |
998 | loopcnt = 0; |
999 | while((cnt = lpfc_sli_sum_iocb(phba, |
1000 | &phba->sli.ring[phba->sli.fcp_ring], |
1001 | cmnd->device->id, cmnd->device->lun, |
1002 | LPFC_CTX_LUN))) { |
1003 | spin_unlock_irq(phba->host->host_lock); |
1004 | set_current_state(TASK_UNINTERRUPTIBLE); |
1005 | schedule_timeout(LPFC_RESET_WAIT*HZ); |
1006 | spin_lock_irq(phba->host->host_lock); |
1007 | |
1008 | if (++loopcnt |
1009 | > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) |
1010 | break; |
1011 | } |
1012 | |
1013 | if (cnt) { |
1014 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
1015 | "%d:0719 LUN Reset I/O flush failure: cnt x%x\n", |
1016 | phba->brd_no, cnt); |
1017 | } |
1018 | |
1019 | list_add_tail(&iocbqrsp->list, lpfc_iocb_list); |
1020 | |
1021 | out_free_scsi_buf: |
1022 | lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
1023 | "%d:0713 SCSI layer issued LUN reset (%d, %d) " |
1024 | "Data: x%x x%x x%x\n", |
1025 | phba->brd_no, lpfc_cmd->pCmd->device->id, |
1026 | lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status, |
1027 | lpfc_cmd->result); |
1028 | lpfc_free_scsi_buf(lpfc_cmd); |
1029 | out: |
1030 | return ret; |
1031 | } |
1032 | |
1033 | /* |
1034 | * Note: midlayer calls this function with the host_lock held |
1035 | */ |
1036 | static int |
1037 | lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) |
1038 | { |
1039 | struct Scsi_Host *shost = cmnd->device->host; |
1040 | struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; |
1041 | struct lpfc_nodelist *ndlp = NULL; |
1042 | int match; |
1043 | int ret = FAILED, i, err_count = 0; |
1044 | int cnt, loopcnt; |
1045 | unsigned int midlayer_id = 0; |
1046 | struct lpfc_scsi_buf * lpfc_cmd = NULL; |
1047 | struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; |
1048 | |
1049 | list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); |
1050 | if (lpfc_cmd == NULL) |
1051 | goto out; |
1052 | |
1053 | /* The lpfc_cmd storage is reused. Set all loop invariants. */ |
1054 | lpfc_cmd->timeout = 60; |
1055 | lpfc_cmd->pCmd = cmnd; |
1056 | lpfc_cmd->scsi_hba = phba; |
1057 | |
1058 | /* |
1059 | * Since the driver manages a single bus device, reset all |
1060 | * targets known to the driver. Should any target reset |
1061 | * fail, this routine returns failure to the midlayer. |
1062 | */ |
1063 | midlayer_id = cmnd->device->id; |
1064 | for (i = 0; i < MAX_FCP_TARGET; i++) { |
1065 | /* Search the mapped list for this target ID */ |
1066 | match = 0; |
1067 | list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) { |
1068 | if ((i == ndlp->nlp_sid) && ndlp->rport) { |
1069 | match = 1; |
1070 | break; |
1071 | } |
1072 | } |
1073 | if (!match) |
1074 | continue; |
1075 | |
1076 | lpfc_cmd->pCmd->device->id = i; |
1077 | lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data; |
1078 | ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba); |
1079 | if (ret != SUCCESS) { |
1080 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
1081 | "%d:0713 Bus Reset on target %d failed\n", |
1082 | phba->brd_no, i); |
1083 | err_count++; |
1084 | } |
1085 | } |
1086 | |
1087 | cmnd->device->id = midlayer_id; |
1088 | loopcnt = 0; |
1089 | while((cnt = lpfc_sli_sum_iocb(phba, |
1090 | &phba->sli.ring[phba->sli.fcp_ring], |
1091 | 0, 0, LPFC_CTX_HOST))) { |
1092 | spin_unlock_irq(phba->host->host_lock); |
1093 | set_current_state(TASK_UNINTERRUPTIBLE); |
1094 | schedule_timeout(LPFC_RESET_WAIT*HZ); |
1095 | spin_lock_irq(phba->host->host_lock); |
1096 | |
1097 | if (++loopcnt |
1098 | > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) |
1099 | break; |
1100 | } |
1101 | |
1102 | if (cnt) { |
1103 | /* flush all outstanding commands on the host */ |
1104 | i = lpfc_sli_abort_iocb(phba, |
1105 | &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0, |
1106 | LPFC_CTX_HOST); |
1107 | |
1108 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
1109 | "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n", |
1110 | phba->brd_no, cnt, i); |
1111 | } |
1112 | |
1113 | if (!err_count) |
1114 | ret = SUCCESS; |
1115 | |
1116 | lpfc_free_scsi_buf(lpfc_cmd); |
1117 | lpfc_printf_log(phba, |
1118 | KERN_ERR, |
1119 | LOG_FCP, |
1120 | "%d:0714 SCSI layer issued Bus Reset Data: x%x\n", |
1121 | phba->brd_no, ret); |
1122 | out: |
1123 | return ret; |
1124 | } |
1125 | |
1126 | static int |
1127 | lpfc_slave_alloc(struct scsi_device *sdev) |
1128 | { |
1129 | struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0]; |
1130 | struct lpfc_nodelist *ndlp = NULL; |
1131 | int match = 0; |
1132 | struct lpfc_scsi_buf *scsi_buf = NULL; |
1133 | uint32_t total = 0, i; |
1134 | uint32_t num_to_alloc = 0; |
1135 | unsigned long flags; |
1136 | struct list_head *listp; |
1137 | struct list_head *node_list[6]; |
1138 | |
1139 | /* |
1140 | * Store the target pointer in the scsi_device hostdata pointer provided |
1141 | * the driver has already discovered the target id. |
1142 | */ |
1143 | |
1144 | /* Search the nlp lists other than unmap_list for this target ID */ |
1145 | node_list[0] = &phba->fc_npr_list; |
1146 | node_list[1] = &phba->fc_nlpmap_list; |
1147 | node_list[2] = &phba->fc_prli_list; |
1148 | node_list[3] = &phba->fc_reglogin_list; |
1149 | node_list[4] = &phba->fc_adisc_list; |
1150 | node_list[5] = &phba->fc_plogi_list; |
1151 | |
1152 | for (i = 0; i < 6 && !match; i++) { |
1153 | listp = node_list[i]; |
1154 | if (list_empty(listp)) |
1155 | continue; |
1156 | list_for_each_entry(ndlp, listp, nlp_listp) { |
1157 | if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) { |
1158 | match = 1; |
1159 | break; |
1160 | } |
1161 | } |
1162 | } |
1163 | |
1164 | if (!match) |
1165 | return -ENXIO; |
1166 | |
1167 | sdev->hostdata = ndlp->rport->dd_data; |
1168 | |
1169 | /* |
1170 | * Populate the cmds_per_lun count scsi_bufs into this host's globally |
1171 | * available list of scsi buffers. Don't allocate more than the |
1172 | * HBA limit conveyed to the midlayer via the host structure. Note |
1173 | * that this list of scsi bufs exists for the lifetime of the driver. |
1174 | */ |
1175 | total = phba->total_scsi_bufs; |
1176 | num_to_alloc = LPFC_CMD_PER_LUN; |
1177 | if (total >= phba->cfg_hba_queue_depth) { |
1178 | printk(KERN_WARNING "%s, At config limitation of " |
1179 | "%d allocated scsi_bufs\n", __FUNCTION__, total); |
1180 | return 0; |
1181 | } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) { |
1182 | num_to_alloc = phba->cfg_hba_queue_depth - total; |
1183 | } |
1184 | |
1185 | for (i = 0; i < num_to_alloc; i++) { |
1186 | scsi_buf = lpfc_get_scsi_buf(phba); |
1187 | if (!scsi_buf) { |
1188 | printk(KERN_ERR "%s, failed to allocate " |
1189 | "scsi_buf\n", __FUNCTION__); |
1190 | break; |
1191 | } |
1192 | |
1193 | spin_lock_irqsave(phba->host->host_lock, flags); |
1194 | phba->total_scsi_bufs++; |
1195 | list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); |
1196 | spin_unlock_irqrestore(phba->host->host_lock, flags); |
1197 | } |
1198 | return 0; |
1199 | } |
1200 | |
1201 | static int |
1202 | lpfc_slave_configure(struct scsi_device *sdev) |
1203 | { |
1204 | struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0]; |
1205 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
1206 | |
1207 | if (sdev->tagged_supported) |
1208 | scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth); |
1209 | else |
1210 | scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth); |
1211 | |
1212 | /* |
1213 | * Initialize the fc transport attributes for the target |
1214 | * containing this scsi device. Also note that the driver's |
1215 | * target pointer is stored in the starget_data for the |
1216 | * driver's sysfs entry point functions. |
1217 | */ |
1218 | rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5; |
1219 | |
1220 | return 0; |
1221 | } |
1222 | |
1223 | static void |
1224 | lpfc_slave_destroy(struct scsi_device *sdev) |
1225 | { |
1226 | sdev->hostdata = NULL; |
1227 | return; |
1228 | } |
1229 | |
1230 | struct scsi_host_template lpfc_template = { |
1231 | .module = THIS_MODULE, |
1232 | .name = LPFC_DRIVER_NAME, |
1233 | .info = lpfc_info, |
1234 | .queuecommand = lpfc_queuecommand, |
1235 | .eh_abort_handler = lpfc_abort_handler, |
1236 | .eh_device_reset_handler= lpfc_reset_lun_handler, |
1237 | .eh_bus_reset_handler = lpfc_reset_bus_handler, |
1238 | .slave_alloc = lpfc_slave_alloc, |
1239 | .slave_configure = lpfc_slave_configure, |
1240 | .slave_destroy = lpfc_slave_destroy, |
1241 | .this_id = -1, |
1242 | .sg_tablesize = LPFC_SG_SEG_CNT, |
1243 | .cmd_per_lun = LPFC_CMD_PER_LUN, |
1244 | .use_clustering = ENABLE_CLUSTERING, |
1245 | .shost_attrs = lpfc_host_attrs, |
1246 | }; |