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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 | |
8fa728a2 | 801 | __lpfc_abort_handler(struct scsi_cmnd *cmnd) |
dea3101e | 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 | ||
8fa728a2 JG |
920 | static int |
921 | lpfc_abort_handler(struct scsi_cmnd *cmnd) | |
922 | { | |
923 | int rc; | |
924 | spin_lock_irq(cmnd->device->host->host_lock); | |
925 | rc = __lpfc_abort_handler(cmnd); | |
926 | spin_unlock_irq(cmnd->device->host->host_lock); | |
927 | return rc; | |
928 | } | |
929 | ||
dea3101e | 930 | static int |
94d0e7b8 | 931 | __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) |
dea3101e | 932 | { |
933 | struct Scsi_Host *shost = cmnd->device->host; | |
934 | struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; | |
935 | struct lpfc_sli *psli = &phba->sli; | |
936 | struct lpfc_scsi_buf *lpfc_cmd = NULL; | |
937 | struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; | |
938 | struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list; | |
939 | struct lpfc_iocbq *iocbq, *iocbqrsp = NULL; | |
940 | struct lpfc_rport_data *rdata = cmnd->device->hostdata; | |
941 | struct lpfc_nodelist *pnode = rdata->pnode; | |
942 | int ret = FAILED; | |
943 | int cnt, loopcnt; | |
944 | ||
945 | /* | |
946 | * If target is not in a MAPPED state, delay the reset until | |
947 | * target is rediscovered or nodev timeout expires. | |
948 | */ | |
949 | while ( 1 ) { | |
950 | if (!pnode) | |
951 | break; | |
952 | ||
953 | if (pnode->nlp_state != NLP_STE_MAPPED_NODE) { | |
954 | spin_unlock_irq(phba->host->host_lock); | |
955 | set_current_state(TASK_UNINTERRUPTIBLE); | |
956 | schedule_timeout( HZ/2); | |
957 | spin_lock_irq(phba->host->host_lock); | |
958 | } | |
959 | if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE)) | |
960 | break; | |
961 | } | |
962 | ||
963 | list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); | |
964 | if (lpfc_cmd == NULL) | |
965 | goto out; | |
966 | ||
967 | lpfc_cmd->pCmd = cmnd; | |
968 | lpfc_cmd->timeout = 60; | |
969 | lpfc_cmd->scsi_hba = phba; | |
970 | ||
971 | ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET); | |
972 | if (!ret) | |
973 | goto out_free_scsi_buf; | |
974 | ||
975 | iocbq = &lpfc_cmd->cur_iocbq; | |
976 | ||
977 | /* get a buffer for this IOCB command response */ | |
978 | list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list); | |
979 | if (iocbqrsp == NULL) | |
980 | goto out_free_scsi_buf; | |
981 | ||
982 | memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq)); | |
983 | ||
984 | iocbq->iocb_flag |= LPFC_IO_POLL; | |
985 | iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority; | |
986 | ||
987 | ret = lpfc_sli_issue_iocb_wait_high_priority(phba, | |
988 | &phba->sli.ring[psli->fcp_ring], | |
989 | iocbq, 0, iocbqrsp, 60); | |
990 | if (ret == IOCB_SUCCESS) | |
991 | ret = SUCCESS; | |
992 | ||
993 | lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; | |
994 | lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; | |
995 | if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT) | |
996 | if (lpfc_cmd->result & IOERR_DRVR_MASK) | |
997 | lpfc_cmd->status = IOSTAT_DRIVER_REJECT; | |
998 | ||
999 | /* | |
1000 | * All outstanding txcmplq I/Os should have been aborted by the target. | |
1001 | * Unfortunately, some targets do not abide by this forcing the driver | |
1002 | * to double check. | |
1003 | */ | |
1004 | lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], | |
1005 | cmnd->device->id, cmnd->device->lun, 0, | |
1006 | LPFC_CTX_LUN); | |
1007 | ||
1008 | loopcnt = 0; | |
1009 | while((cnt = lpfc_sli_sum_iocb(phba, | |
1010 | &phba->sli.ring[phba->sli.fcp_ring], | |
1011 | cmnd->device->id, cmnd->device->lun, | |
1012 | LPFC_CTX_LUN))) { | |
1013 | spin_unlock_irq(phba->host->host_lock); | |
1014 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1015 | schedule_timeout(LPFC_RESET_WAIT*HZ); | |
1016 | spin_lock_irq(phba->host->host_lock); | |
1017 | ||
1018 | if (++loopcnt | |
1019 | > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) | |
1020 | break; | |
1021 | } | |
1022 | ||
1023 | if (cnt) { | |
1024 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, | |
1025 | "%d:0719 LUN Reset I/O flush failure: cnt x%x\n", | |
1026 | phba->brd_no, cnt); | |
1027 | } | |
1028 | ||
1029 | list_add_tail(&iocbqrsp->list, lpfc_iocb_list); | |
1030 | ||
1031 | out_free_scsi_buf: | |
1032 | lpfc_printf_log(phba, KERN_ERR, LOG_FCP, | |
1033 | "%d:0713 SCSI layer issued LUN reset (%d, %d) " | |
1034 | "Data: x%x x%x x%x\n", | |
1035 | phba->brd_no, lpfc_cmd->pCmd->device->id, | |
1036 | lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status, | |
1037 | lpfc_cmd->result); | |
1038 | lpfc_free_scsi_buf(lpfc_cmd); | |
1039 | out: | |
1040 | return ret; | |
1041 | } | |
1042 | ||
94d0e7b8 JG |
1043 | static int |
1044 | lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) | |
1045 | { | |
1046 | int rc; | |
1047 | spin_lock_irq(cmnd->device->host->host_lock); | |
1048 | rc = __lpfc_reset_lun_handler(cmnd); | |
1049 | spin_unlock_irq(cmnd->device->host->host_lock); | |
1050 | return rc; | |
1051 | } | |
1052 | ||
dea3101e | 1053 | /* |
1054 | * Note: midlayer calls this function with the host_lock held | |
1055 | */ | |
1056 | static int | |
68b3aa7c | 1057 | __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) |
dea3101e | 1058 | { |
1059 | struct Scsi_Host *shost = cmnd->device->host; | |
1060 | struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; | |
1061 | struct lpfc_nodelist *ndlp = NULL; | |
1062 | int match; | |
1063 | int ret = FAILED, i, err_count = 0; | |
1064 | int cnt, loopcnt; | |
1065 | unsigned int midlayer_id = 0; | |
1066 | struct lpfc_scsi_buf * lpfc_cmd = NULL; | |
1067 | struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; | |
1068 | ||
1069 | list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); | |
1070 | if (lpfc_cmd == NULL) | |
1071 | goto out; | |
1072 | ||
1073 | /* The lpfc_cmd storage is reused. Set all loop invariants. */ | |
1074 | lpfc_cmd->timeout = 60; | |
1075 | lpfc_cmd->pCmd = cmnd; | |
1076 | lpfc_cmd->scsi_hba = phba; | |
1077 | ||
1078 | /* | |
1079 | * Since the driver manages a single bus device, reset all | |
1080 | * targets known to the driver. Should any target reset | |
1081 | * fail, this routine returns failure to the midlayer. | |
1082 | */ | |
1083 | midlayer_id = cmnd->device->id; | |
1084 | for (i = 0; i < MAX_FCP_TARGET; i++) { | |
1085 | /* Search the mapped list for this target ID */ | |
1086 | match = 0; | |
1087 | list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) { | |
1088 | if ((i == ndlp->nlp_sid) && ndlp->rport) { | |
1089 | match = 1; | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | if (!match) | |
1094 | continue; | |
1095 | ||
1096 | lpfc_cmd->pCmd->device->id = i; | |
1097 | lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data; | |
1098 | ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba); | |
1099 | if (ret != SUCCESS) { | |
1100 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, | |
1101 | "%d:0713 Bus Reset on target %d failed\n", | |
1102 | phba->brd_no, i); | |
1103 | err_count++; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | cmnd->device->id = midlayer_id; | |
1108 | loopcnt = 0; | |
1109 | while((cnt = lpfc_sli_sum_iocb(phba, | |
1110 | &phba->sli.ring[phba->sli.fcp_ring], | |
1111 | 0, 0, LPFC_CTX_HOST))) { | |
1112 | spin_unlock_irq(phba->host->host_lock); | |
1113 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1114 | schedule_timeout(LPFC_RESET_WAIT*HZ); | |
1115 | spin_lock_irq(phba->host->host_lock); | |
1116 | ||
1117 | if (++loopcnt | |
1118 | > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) | |
1119 | break; | |
1120 | } | |
1121 | ||
1122 | if (cnt) { | |
1123 | /* flush all outstanding commands on the host */ | |
1124 | i = lpfc_sli_abort_iocb(phba, | |
1125 | &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0, | |
1126 | LPFC_CTX_HOST); | |
1127 | ||
1128 | lpfc_printf_log(phba, KERN_INFO, LOG_FCP, | |
1129 | "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n", | |
1130 | phba->brd_no, cnt, i); | |
1131 | } | |
1132 | ||
1133 | if (!err_count) | |
1134 | ret = SUCCESS; | |
1135 | ||
1136 | lpfc_free_scsi_buf(lpfc_cmd); | |
1137 | lpfc_printf_log(phba, | |
1138 | KERN_ERR, | |
1139 | LOG_FCP, | |
1140 | "%d:0714 SCSI layer issued Bus Reset Data: x%x\n", | |
1141 | phba->brd_no, ret); | |
1142 | out: | |
1143 | return ret; | |
1144 | } | |
1145 | ||
68b3aa7c JG |
1146 | static int |
1147 | lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) | |
1148 | { | |
1149 | int rc; | |
1150 | spin_lock_irq(cmnd->device->host->host_lock); | |
1151 | rc = __lpfc_reset_bus_handler(cmnd); | |
1152 | spin_unlock_irq(cmnd->device->host->host_lock); | |
1153 | return rc; | |
1154 | } | |
1155 | ||
dea3101e | 1156 | static int |
1157 | lpfc_slave_alloc(struct scsi_device *sdev) | |
1158 | { | |
1159 | struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0]; | |
1160 | struct lpfc_nodelist *ndlp = NULL; | |
1161 | int match = 0; | |
1162 | struct lpfc_scsi_buf *scsi_buf = NULL; | |
1163 | uint32_t total = 0, i; | |
1164 | uint32_t num_to_alloc = 0; | |
1165 | unsigned long flags; | |
1166 | struct list_head *listp; | |
1167 | struct list_head *node_list[6]; | |
1168 | ||
1169 | /* | |
1170 | * Store the target pointer in the scsi_device hostdata pointer provided | |
1171 | * the driver has already discovered the target id. | |
1172 | */ | |
1173 | ||
1174 | /* Search the nlp lists other than unmap_list for this target ID */ | |
1175 | node_list[0] = &phba->fc_npr_list; | |
1176 | node_list[1] = &phba->fc_nlpmap_list; | |
1177 | node_list[2] = &phba->fc_prli_list; | |
1178 | node_list[3] = &phba->fc_reglogin_list; | |
1179 | node_list[4] = &phba->fc_adisc_list; | |
1180 | node_list[5] = &phba->fc_plogi_list; | |
1181 | ||
1182 | for (i = 0; i < 6 && !match; i++) { | |
1183 | listp = node_list[i]; | |
1184 | if (list_empty(listp)) | |
1185 | continue; | |
1186 | list_for_each_entry(ndlp, listp, nlp_listp) { | |
1187 | if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) { | |
1188 | match = 1; | |
1189 | break; | |
1190 | } | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | if (!match) | |
1195 | return -ENXIO; | |
1196 | ||
1197 | sdev->hostdata = ndlp->rport->dd_data; | |
1198 | ||
1199 | /* | |
1200 | * Populate the cmds_per_lun count scsi_bufs into this host's globally | |
1201 | * available list of scsi buffers. Don't allocate more than the | |
1202 | * HBA limit conveyed to the midlayer via the host structure. Note | |
1203 | * that this list of scsi bufs exists for the lifetime of the driver. | |
1204 | */ | |
1205 | total = phba->total_scsi_bufs; | |
1206 | num_to_alloc = LPFC_CMD_PER_LUN; | |
1207 | if (total >= phba->cfg_hba_queue_depth) { | |
1208 | printk(KERN_WARNING "%s, At config limitation of " | |
1209 | "%d allocated scsi_bufs\n", __FUNCTION__, total); | |
1210 | return 0; | |
1211 | } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) { | |
1212 | num_to_alloc = phba->cfg_hba_queue_depth - total; | |
1213 | } | |
1214 | ||
1215 | for (i = 0; i < num_to_alloc; i++) { | |
1216 | scsi_buf = lpfc_get_scsi_buf(phba); | |
1217 | if (!scsi_buf) { | |
1218 | printk(KERN_ERR "%s, failed to allocate " | |
1219 | "scsi_buf\n", __FUNCTION__); | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | spin_lock_irqsave(phba->host->host_lock, flags); | |
1224 | phba->total_scsi_bufs++; | |
1225 | list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); | |
1226 | spin_unlock_irqrestore(phba->host->host_lock, flags); | |
1227 | } | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | static int | |
1232 | lpfc_slave_configure(struct scsi_device *sdev) | |
1233 | { | |
1234 | struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0]; | |
1235 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); | |
1236 | ||
1237 | if (sdev->tagged_supported) | |
1238 | scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth); | |
1239 | else | |
1240 | scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth); | |
1241 | ||
1242 | /* | |
1243 | * Initialize the fc transport attributes for the target | |
1244 | * containing this scsi device. Also note that the driver's | |
1245 | * target pointer is stored in the starget_data for the | |
1246 | * driver's sysfs entry point functions. | |
1247 | */ | |
1248 | rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5; | |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | static void | |
1254 | lpfc_slave_destroy(struct scsi_device *sdev) | |
1255 | { | |
1256 | sdev->hostdata = NULL; | |
1257 | return; | |
1258 | } | |
1259 | ||
1260 | struct scsi_host_template lpfc_template = { | |
1261 | .module = THIS_MODULE, | |
1262 | .name = LPFC_DRIVER_NAME, | |
1263 | .info = lpfc_info, | |
1264 | .queuecommand = lpfc_queuecommand, | |
1265 | .eh_abort_handler = lpfc_abort_handler, | |
1266 | .eh_device_reset_handler= lpfc_reset_lun_handler, | |
1267 | .eh_bus_reset_handler = lpfc_reset_bus_handler, | |
1268 | .slave_alloc = lpfc_slave_alloc, | |
1269 | .slave_configure = lpfc_slave_configure, | |
1270 | .slave_destroy = lpfc_slave_destroy, | |
1271 | .this_id = -1, | |
1272 | .sg_tablesize = LPFC_SG_SEG_CNT, | |
1273 | .cmd_per_lun = LPFC_CMD_PER_LUN, | |
1274 | .use_clustering = ENABLE_CLUSTERING, | |
1275 | .shost_attrs = lpfc_host_attrs, | |
1276 | }; |