Merge branch 'linux-2.6'
[linux-2.6] / drivers / scsi / lpfc / lpfc_scsi.c
1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2004-2007 Emulex.  All rights reserved.           *
5  * EMULEX and SLI are trademarks of Emulex.                        *
6  * www.emulex.com                                                  *
7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
8  *                                                                 *
9  * This program is free software; you can redistribute it and/or   *
10  * modify it under the terms of version 2 of the GNU General       *
11  * Public License as published by the Free Software Foundation.    *
12  * This program is distributed in the hope that it will be useful. *
13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
18  * more details, a copy of which can be found in the file COPYING  *
19  * included with this package.                                     *
20  *******************************************************************/
21
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_tcq.h>
30 #include <scsi/scsi_transport_fc.h>
31
32 #include "lpfc_version.h"
33 #include "lpfc_hw.h"
34 #include "lpfc_sli.h"
35 #include "lpfc_disc.h"
36 #include "lpfc_scsi.h"
37 #include "lpfc.h"
38 #include "lpfc_logmsg.h"
39 #include "lpfc_crtn.h"
40 #include "lpfc_vport.h"
41
42 #define LPFC_RESET_WAIT  2
43 #define LPFC_ABORT_WAIT  2
44
45 /*
46  * This function is called with no lock held when there is a resource
47  * error in driver or in firmware.
48  */
49 void
50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
51 {
52         unsigned long flags;
53
54         spin_lock_irqsave(&phba->hbalock, flags);
55         atomic_inc(&phba->num_rsrc_err);
56         phba->last_rsrc_error_time = jiffies;
57
58         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
59                 spin_unlock_irqrestore(&phba->hbalock, flags);
60                 return;
61         }
62
63         phba->last_ramp_down_time = jiffies;
64
65         spin_unlock_irqrestore(&phba->hbalock, flags);
66
67         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
68         if ((phba->pport->work_port_events &
69                 WORKER_RAMP_DOWN_QUEUE) == 0) {
70                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
71         }
72         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
73
74         spin_lock_irqsave(&phba->hbalock, flags);
75         if (phba->work_wait)
76                 wake_up(phba->work_wait);
77         spin_unlock_irqrestore(&phba->hbalock, flags);
78
79         return;
80 }
81
82 /*
83  * This function is called with no lock held when there is a successful
84  * SCSI command completion.
85  */
86 static inline void
87 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
88                         struct scsi_device *sdev)
89 {
90         unsigned long flags;
91         struct lpfc_hba *phba = vport->phba;
92         atomic_inc(&phba->num_cmd_success);
93
94         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
95                 return;
96         spin_lock_irqsave(&phba->hbalock, flags);
97         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
98          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
99                 spin_unlock_irqrestore(&phba->hbalock, flags);
100                 return;
101         }
102         phba->last_ramp_up_time = jiffies;
103         spin_unlock_irqrestore(&phba->hbalock, flags);
104
105         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
106         if ((phba->pport->work_port_events &
107                 WORKER_RAMP_UP_QUEUE) == 0) {
108                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
109         }
110         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
111
112         spin_lock_irqsave(&phba->hbalock, flags);
113         if (phba->work_wait)
114                 wake_up(phba->work_wait);
115         spin_unlock_irqrestore(&phba->hbalock, flags);
116 }
117
118 void
119 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
120 {
121         struct lpfc_vport **vports;
122         struct Scsi_Host  *shost;
123         struct scsi_device *sdev;
124         unsigned long new_queue_depth;
125         unsigned long num_rsrc_err, num_cmd_success;
126         int i;
127
128         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
129         num_cmd_success = atomic_read(&phba->num_cmd_success);
130
131         vports = lpfc_create_vport_work_array(phba);
132         if (vports != NULL)
133                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
134                         shost = lpfc_shost_from_vport(vports[i]);
135                         shost_for_each_device(sdev, shost) {
136                                 new_queue_depth =
137                                         sdev->queue_depth * num_rsrc_err /
138                                         (num_rsrc_err + num_cmd_success);
139                                 if (!new_queue_depth)
140                                         new_queue_depth = sdev->queue_depth - 1;
141                                 else
142                                         new_queue_depth = sdev->queue_depth -
143                                                                 new_queue_depth;
144                                 if (sdev->ordered_tags)
145                                         scsi_adjust_queue_depth(sdev,
146                                                         MSG_ORDERED_TAG,
147                                                         new_queue_depth);
148                                 else
149                                         scsi_adjust_queue_depth(sdev,
150                                                         MSG_SIMPLE_TAG,
151                                                         new_queue_depth);
152                         }
153                 }
154         lpfc_destroy_vport_work_array(phba, vports);
155         atomic_set(&phba->num_rsrc_err, 0);
156         atomic_set(&phba->num_cmd_success, 0);
157 }
158
159 void
160 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
161 {
162         struct lpfc_vport **vports;
163         struct Scsi_Host  *shost;
164         struct scsi_device *sdev;
165         int i;
166
167         vports = lpfc_create_vport_work_array(phba);
168         if (vports != NULL)
169                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
170                         shost = lpfc_shost_from_vport(vports[i]);
171                         shost_for_each_device(sdev, shost) {
172                                 if (sdev->ordered_tags)
173                                         scsi_adjust_queue_depth(sdev,
174                                                         MSG_ORDERED_TAG,
175                                                         sdev->queue_depth+1);
176                                 else
177                                         scsi_adjust_queue_depth(sdev,
178                                                         MSG_SIMPLE_TAG,
179                                                         sdev->queue_depth+1);
180                         }
181                 }
182         lpfc_destroy_vport_work_array(phba, vports);
183         atomic_set(&phba->num_rsrc_err, 0);
184         atomic_set(&phba->num_cmd_success, 0);
185 }
186
187 /*
188  * This routine allocates a scsi buffer, which contains all the necessary
189  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
190  * contains information to build the IOCB.  The DMAable region contains
191  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
192  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
193  * and the BPL BDE is setup in the IOCB.
194  */
195 static struct lpfc_scsi_buf *
196 lpfc_new_scsi_buf(struct lpfc_vport *vport)
197 {
198         struct lpfc_hba *phba = vport->phba;
199         struct lpfc_scsi_buf *psb;
200         struct ulp_bde64 *bpl;
201         IOCB_t *iocb;
202         dma_addr_t pdma_phys;
203         uint16_t iotag;
204
205         psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
206         if (!psb)
207                 return NULL;
208
209         /*
210          * Get memory from the pci pool to map the virt space to pci bus space
211          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
212          * struct fcp_rsp and the number of bde's necessary to support the
213          * sg_tablesize.
214          */
215         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
216                                                         &psb->dma_handle);
217         if (!psb->data) {
218                 kfree(psb);
219                 return NULL;
220         }
221
222         /* Initialize virtual ptrs to dma_buf region. */
223         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
224
225         /* Allocate iotag for psb->cur_iocbq. */
226         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
227         if (iotag == 0) {
228                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
229                               psb->data, psb->dma_handle);
230                 kfree (psb);
231                 return NULL;
232         }
233         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
234
235         psb->fcp_cmnd = psb->data;
236         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
237         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
238                                                         sizeof(struct fcp_rsp);
239
240         /* Initialize local short-hand pointers. */
241         bpl = psb->fcp_bpl;
242         pdma_phys = psb->dma_handle;
243
244         /*
245          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
246          * list bdes.  Initialize the first two and leave the rest for
247          * queuecommand.
248          */
249         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
250         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
251         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
252         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
253         bpl->tus.w = le32_to_cpu(bpl->tus.w);
254         bpl++;
255
256         /* Setup the physical region for the FCP RSP */
257         pdma_phys += sizeof (struct fcp_cmnd);
258         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
259         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
260         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
261         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
262         bpl->tus.w = le32_to_cpu(bpl->tus.w);
263
264         /*
265          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
266          * initialize it with all known data now.
267          */
268         pdma_phys += (sizeof (struct fcp_rsp));
269         iocb = &psb->cur_iocbq.iocb;
270         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
271         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
272         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
273         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
274         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
275         iocb->ulpBdeCount = 1;
276         iocb->ulpClass = CLASS3;
277
278         return psb;
279 }
280
281 static struct lpfc_scsi_buf*
282 lpfc_get_scsi_buf(struct lpfc_hba * phba)
283 {
284         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
285         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
286         unsigned long iflag = 0;
287
288         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
289         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
290         if (lpfc_cmd) {
291                 lpfc_cmd->seg_cnt = 0;
292                 lpfc_cmd->nonsg_phys = 0;
293         }
294         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
295         return  lpfc_cmd;
296 }
297
298 static void
299 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
300 {
301         unsigned long iflag = 0;
302
303         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
304         psb->pCmd = NULL;
305         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
306         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
307 }
308
309 static int
310 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
311 {
312         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
313         struct scatterlist *sgel = NULL;
314         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
315         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
316         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
317         dma_addr_t physaddr;
318         uint32_t i, num_bde = 0;
319         int nseg, datadir = scsi_cmnd->sc_data_direction;
320
321         /*
322          * There are three possibilities here - use scatter-gather segment, use
323          * the single mapping, or neither.  Start the lpfc command prep by
324          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
325          * data bde entry.
326          */
327         bpl += 2;
328         if (scsi_sg_count(scsi_cmnd)) {
329                 /*
330                  * The driver stores the segment count returned from pci_map_sg
331                  * because this a count of dma-mappings used to map the use_sg
332                  * pages.  They are not guaranteed to be the same for those
333                  * architectures that implement an IOMMU.
334                  */
335
336                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
337                                   scsi_sg_count(scsi_cmnd), datadir);
338                 if (unlikely(!nseg))
339                         return 1;
340
341                 lpfc_cmd->seg_cnt = nseg;
342                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
343                         printk(KERN_ERR "%s: Too many sg segments from "
344                                "dma_map_sg.  Config %d, seg_cnt %d",
345                                __FUNCTION__, phba->cfg_sg_seg_cnt,
346                                lpfc_cmd->seg_cnt);
347                         scsi_dma_unmap(scsi_cmnd);
348                         return 1;
349                 }
350
351                 /*
352                  * The driver established a maximum scatter-gather segment count
353                  * during probe that limits the number of sg elements in any
354                  * single scsi command.  Just run through the seg_cnt and format
355                  * the bde's.
356                  */
357                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) {
358                         physaddr = sg_dma_address(sgel);
359                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
360                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
361                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
362                         if (datadir == DMA_TO_DEVICE)
363                                 bpl->tus.f.bdeFlags = 0;
364                         else
365                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
366                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
367                         bpl++;
368                         num_bde++;
369                 }
370         }
371
372         /*
373          * Finish initializing those IOCB fields that are dependent on the
374          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
375          * reinitialized since all iocb memory resources are used many times
376          * for transmit, receive, and continuation bpl's.
377          */
378         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
379         iocb_cmd->un.fcpi64.bdl.bdeSize +=
380                 (num_bde * sizeof (struct ulp_bde64));
381         iocb_cmd->ulpBdeCount = 1;
382         iocb_cmd->ulpLe = 1;
383         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
384         return 0;
385 }
386
387 static void
388 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
389 {
390         /*
391          * There are only two special cases to consider.  (1) the scsi command
392          * requested scatter-gather usage or (2) the scsi command allocated
393          * a request buffer, but did not request use_sg.  There is a third
394          * case, but it does not require resource deallocation.
395          */
396         if (psb->seg_cnt > 0)
397                 scsi_dma_unmap(psb->pCmd);
398 }
399
400 static void
401 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
402                     struct lpfc_iocbq *rsp_iocb)
403 {
404         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
405         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
406         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
407         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
408         uint32_t resp_info = fcprsp->rspStatus2;
409         uint32_t scsi_status = fcprsp->rspStatus3;
410         uint32_t *lp;
411         uint32_t host_status = DID_OK;
412         uint32_t rsplen = 0;
413         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
414
415         /*
416          *  If this is a task management command, there is no
417          *  scsi packet associated with this lpfc_cmd.  The driver
418          *  consumes it.
419          */
420         if (fcpcmd->fcpCntl2) {
421                 scsi_status = 0;
422                 goto out;
423         }
424
425         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
426                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
427                 if (snslen > SCSI_SENSE_BUFFERSIZE)
428                         snslen = SCSI_SENSE_BUFFERSIZE;
429
430                 if (resp_info & RSP_LEN_VALID)
431                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
432                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
433         }
434         lp = (uint32_t *)cmnd->sense_buffer;
435
436         if (!scsi_status && (resp_info & RESID_UNDER))
437                 logit = LOG_FCP;
438
439         lpfc_printf_vlog(vport, KERN_WARNING, logit,
440                          "0730 FCP command x%x failed: x%x SNS x%x x%x "
441                          "Data: x%x x%x x%x x%x x%x\n",
442                          cmnd->cmnd[0], scsi_status,
443                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
444                          be32_to_cpu(fcprsp->rspResId),
445                          be32_to_cpu(fcprsp->rspSnsLen),
446                          be32_to_cpu(fcprsp->rspRspLen),
447                          fcprsp->rspInfo3);
448
449         if (resp_info & RSP_LEN_VALID) {
450                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
451                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
452                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
453                         host_status = DID_ERROR;
454                         goto out;
455                 }
456         }
457
458         scsi_set_resid(cmnd, 0);
459         if (resp_info & RESID_UNDER) {
460                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
461
462                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
463                                  "0716 FCP Read Underrun, expected %d, "
464                                  "residual %d Data: x%x x%x x%x\n",
465                                  be32_to_cpu(fcpcmd->fcpDl),
466                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
467                                  cmnd->underflow);
468
469                 /*
470                  * If there is an under run check if under run reported by
471                  * storage array is same as the under run reported by HBA.
472                  * If this is not same, there is a dropped frame.
473                  */
474                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
475                         fcpi_parm &&
476                         (scsi_get_resid(cmnd) != fcpi_parm)) {
477                         lpfc_printf_vlog(vport, KERN_WARNING,
478                                          LOG_FCP | LOG_FCP_ERROR,
479                                          "0735 FCP Read Check Error "
480                                          "and Underrun Data: x%x x%x x%x x%x\n",
481                                          be32_to_cpu(fcpcmd->fcpDl),
482                                          scsi_get_resid(cmnd), fcpi_parm,
483                                          cmnd->cmnd[0]);
484                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
485                         host_status = DID_ERROR;
486                 }
487                 /*
488                  * The cmnd->underflow is the minimum number of bytes that must
489                  * be transfered for this command.  Provided a sense condition
490                  * is not present, make sure the actual amount transferred is at
491                  * least the underflow value or fail.
492                  */
493                 if (!(resp_info & SNS_LEN_VALID) &&
494                     (scsi_status == SAM_STAT_GOOD) &&
495                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
496                      < cmnd->underflow)) {
497                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
498                                          "0717 FCP command x%x residual "
499                                          "underrun converted to error "
500                                          "Data: x%x x%x x%x\n",
501                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
502                                          scsi_get_resid(cmnd), cmnd->underflow);
503                         host_status = DID_ERROR;
504                 }
505         } else if (resp_info & RESID_OVER) {
506                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
507                                  "0720 FCP command x%x residual overrun error. "
508                                  "Data: x%x x%x \n", cmnd->cmnd[0],
509                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
510                 host_status = DID_ERROR;
511
512         /*
513          * Check SLI validation that all the transfer was actually done
514          * (fcpi_parm should be zero). Apply check only to reads.
515          */
516         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
517                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
518                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
519                                  "0734 FCP Read Check Error Data: "
520                                  "x%x x%x x%x x%x\n",
521                                  be32_to_cpu(fcpcmd->fcpDl),
522                                  be32_to_cpu(fcprsp->rspResId),
523                                  fcpi_parm, cmnd->cmnd[0]);
524                 host_status = DID_ERROR;
525                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
526         }
527
528  out:
529         cmnd->result = ScsiResult(host_status, scsi_status);
530 }
531
532 static void
533 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
534                         struct lpfc_iocbq *pIocbOut)
535 {
536         struct lpfc_scsi_buf *lpfc_cmd =
537                 (struct lpfc_scsi_buf *) pIocbIn->context1;
538         struct lpfc_vport      *vport = pIocbIn->vport;
539         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
540         struct lpfc_nodelist *pnode = rdata->pnode;
541         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
542         int result;
543         struct scsi_device *sdev, *tmp_sdev;
544         int depth = 0;
545         unsigned long flags;
546
547         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
548         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
549
550         if (lpfc_cmd->status) {
551                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
552                     (lpfc_cmd->result & IOERR_DRVR_MASK))
553                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
554                 else if (lpfc_cmd->status >= IOSTAT_CNT)
555                         lpfc_cmd->status = IOSTAT_DEFAULT;
556
557                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
558                                  "0729 FCP cmd x%x failed <%d/%d> "
559                                  "status: x%x result: x%x Data: x%x x%x\n",
560                                  cmd->cmnd[0],
561                                  cmd->device ? cmd->device->id : 0xffff,
562                                  cmd->device ? cmd->device->lun : 0xffff,
563                                  lpfc_cmd->status, lpfc_cmd->result,
564                                  pIocbOut->iocb.ulpContext,
565                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
566
567                 switch (lpfc_cmd->status) {
568                 case IOSTAT_FCP_RSP_ERROR:
569                         /* Call FCP RSP handler to determine result */
570                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
571                         break;
572                 case IOSTAT_NPORT_BSY:
573                 case IOSTAT_FABRIC_BSY:
574                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
575                         break;
576                 case IOSTAT_LOCAL_REJECT:
577                         if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
578                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
579                             lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
580                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
581                         break;
582                 } /* else: fall through */
583                 default:
584                         cmd->result = ScsiResult(DID_ERROR, 0);
585                         break;
586                 }
587
588                 if ((pnode == NULL )
589                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
590                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
591         } else {
592                 cmd->result = ScsiResult(DID_OK, 0);
593         }
594
595         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
596                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
597
598                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
599                                  "0710 Iodone <%d/%d> cmd %p, error "
600                                  "x%x SNS x%x x%x Data: x%x x%x\n",
601                                  cmd->device->id, cmd->device->lun, cmd,
602                                  cmd->result, *lp, *(lp + 3), cmd->retries,
603                                  scsi_get_resid(cmd));
604         }
605
606         result = cmd->result;
607         sdev = cmd->device;
608         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
609         cmd->scsi_done(cmd);
610
611         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
612                 /*
613                  * If there is a thread waiting for command completion
614                  * wake up the thread.
615                  */
616                 spin_lock_irqsave(sdev->host->host_lock, flags);
617                 lpfc_cmd->pCmd = NULL;
618                 if (lpfc_cmd->waitq)
619                         wake_up(lpfc_cmd->waitq);
620                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
621                 lpfc_release_scsi_buf(phba, lpfc_cmd);
622                 return;
623         }
624
625
626         if (!result)
627                 lpfc_rampup_queue_depth(vport, sdev);
628
629         if (!result && pnode != NULL &&
630            ((jiffies - pnode->last_ramp_up_time) >
631                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
632            ((jiffies - pnode->last_q_full_time) >
633                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
634            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
635                 shost_for_each_device(tmp_sdev, sdev->host) {
636                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
637                                 if (tmp_sdev->id != sdev->id)
638                                         continue;
639                                 if (tmp_sdev->ordered_tags)
640                                         scsi_adjust_queue_depth(tmp_sdev,
641                                                 MSG_ORDERED_TAG,
642                                                 tmp_sdev->queue_depth+1);
643                                 else
644                                         scsi_adjust_queue_depth(tmp_sdev,
645                                                 MSG_SIMPLE_TAG,
646                                                 tmp_sdev->queue_depth+1);
647
648                                 pnode->last_ramp_up_time = jiffies;
649                         }
650                 }
651         }
652
653         /*
654          * Check for queue full.  If the lun is reporting queue full, then
655          * back off the lun queue depth to prevent target overloads.
656          */
657         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
658                 pnode->last_q_full_time = jiffies;
659
660                 shost_for_each_device(tmp_sdev, sdev->host) {
661                         if (tmp_sdev->id != sdev->id)
662                                 continue;
663                         depth = scsi_track_queue_full(tmp_sdev,
664                                         tmp_sdev->queue_depth - 1);
665                 }
666                 /*
667                  * The queue depth cannot be lowered any more.
668                  * Modify the returned error code to store
669                  * the final depth value set by
670                  * scsi_track_queue_full.
671                  */
672                 if (depth == -1)
673                         depth = sdev->host->cmd_per_lun;
674
675                 if (depth) {
676                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
677                                          "0711 detected queue full - lun queue "
678                                          "depth adjusted to %d.\n", depth);
679                 }
680         }
681
682         /*
683          * If there is a thread waiting for command completion
684          * wake up the thread.
685          */
686         spin_lock_irqsave(sdev->host->host_lock, flags);
687         lpfc_cmd->pCmd = NULL;
688         if (lpfc_cmd->waitq)
689                 wake_up(lpfc_cmd->waitq);
690         spin_unlock_irqrestore(sdev->host->host_lock, flags);
691
692         lpfc_release_scsi_buf(phba, lpfc_cmd);
693 }
694
695 static void
696 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
697                     struct lpfc_nodelist *pnode)
698 {
699         struct lpfc_hba *phba = vport->phba;
700         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
701         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
702         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
703         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
704         int datadir = scsi_cmnd->sc_data_direction;
705         char tag[2];
706
707         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
708         /* clear task management bits */
709         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
710
711         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
712                         &lpfc_cmd->fcp_cmnd->fcp_lun);
713
714         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
715
716         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
717                 switch (tag[0]) {
718                 case HEAD_OF_QUEUE_TAG:
719                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
720                         break;
721                 case ORDERED_QUEUE_TAG:
722                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
723                         break;
724                 default:
725                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
726                         break;
727                 }
728         } else
729                 fcp_cmnd->fcpCntl1 = 0;
730
731         /*
732          * There are three possibilities here - use scatter-gather segment, use
733          * the single mapping, or neither.  Start the lpfc command prep by
734          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
735          * data bde entry.
736          */
737         if (scsi_sg_count(scsi_cmnd)) {
738                 if (datadir == DMA_TO_DEVICE) {
739                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
740                         iocb_cmd->un.fcpi.fcpi_parm = 0;
741                         iocb_cmd->ulpPU = 0;
742                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
743                         phba->fc4OutputRequests++;
744                 } else {
745                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
746                         iocb_cmd->ulpPU = PARM_READ_CHECK;
747                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
748                         fcp_cmnd->fcpCntl3 = READ_DATA;
749                         phba->fc4InputRequests++;
750                 }
751         } else {
752                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
753                 iocb_cmd->un.fcpi.fcpi_parm = 0;
754                 iocb_cmd->ulpPU = 0;
755                 fcp_cmnd->fcpCntl3 = 0;
756                 phba->fc4ControlRequests++;
757         }
758
759         /*
760          * Finish initializing those IOCB fields that are independent
761          * of the scsi_cmnd request_buffer
762          */
763         piocbq->iocb.ulpContext = pnode->nlp_rpi;
764         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
765                 piocbq->iocb.ulpFCP2Rcvy = 1;
766         else
767                 piocbq->iocb.ulpFCP2Rcvy = 0;
768
769         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
770         piocbq->context1  = lpfc_cmd;
771         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
772         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
773         piocbq->vport = vport;
774 }
775
776 static int
777 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
778                              struct lpfc_scsi_buf *lpfc_cmd,
779                              unsigned int lun,
780                              uint8_t task_mgmt_cmd)
781 {
782         struct lpfc_iocbq *piocbq;
783         IOCB_t *piocb;
784         struct fcp_cmnd *fcp_cmnd;
785         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
786         struct lpfc_nodelist *ndlp = rdata->pnode;
787
788         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
789                 return 0;
790         }
791
792         piocbq = &(lpfc_cmd->cur_iocbq);
793         piocbq->vport = vport;
794
795         piocb = &piocbq->iocb;
796
797         fcp_cmnd = lpfc_cmd->fcp_cmnd;
798         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
799         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
800
801         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
802
803         piocb->ulpContext = ndlp->nlp_rpi;
804         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
805                 piocb->ulpFCP2Rcvy = 1;
806         }
807         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
808
809         /* ulpTimeout is only one byte */
810         if (lpfc_cmd->timeout > 0xff) {
811                 /*
812                  * Do not timeout the command at the firmware level.
813                  * The driver will provide the timeout mechanism.
814                  */
815                 piocb->ulpTimeout = 0;
816         } else {
817                 piocb->ulpTimeout = lpfc_cmd->timeout;
818         }
819
820         return 1;
821 }
822
823 static void
824 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
825                         struct lpfc_iocbq *cmdiocbq,
826                         struct lpfc_iocbq *rspiocbq)
827 {
828         struct lpfc_scsi_buf *lpfc_cmd =
829                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
830         if (lpfc_cmd)
831                 lpfc_release_scsi_buf(phba, lpfc_cmd);
832         return;
833 }
834
835 static int
836 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
837                     unsigned  tgt_id, unsigned int lun,
838                     struct lpfc_rport_data *rdata)
839 {
840         struct lpfc_hba   *phba = vport->phba;
841         struct lpfc_iocbq *iocbq;
842         struct lpfc_iocbq *iocbqrsp;
843         int ret;
844
845         if (!rdata->pnode)
846                 return FAILED;
847
848         lpfc_cmd->rdata = rdata;
849         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
850                                            FCP_TARGET_RESET);
851         if (!ret)
852                 return FAILED;
853
854         iocbq = &lpfc_cmd->cur_iocbq;
855         iocbqrsp = lpfc_sli_get_iocbq(phba);
856
857         if (!iocbqrsp)
858                 return FAILED;
859
860         /* Issue Target Reset to TGT <num> */
861         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
862                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
863                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
864         ret = lpfc_sli_issue_iocb_wait(phba,
865                                        &phba->sli.ring[phba->sli.fcp_ring],
866                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
867         if (ret != IOCB_SUCCESS) {
868                 if (ret == IOCB_TIMEDOUT)
869                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
870                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
871         } else {
872                 ret = SUCCESS;
873                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
874                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
875                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
876                         (lpfc_cmd->result & IOERR_DRVR_MASK))
877                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
878         }
879
880         lpfc_sli_release_iocbq(phba, iocbqrsp);
881         return ret;
882 }
883
884 const char *
885 lpfc_info(struct Scsi_Host *host)
886 {
887         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
888         struct lpfc_hba   *phba = vport->phba;
889         int len;
890         static char  lpfcinfobuf[384];
891
892         memset(lpfcinfobuf,0,384);
893         if (phba && phba->pcidev){
894                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
895                 len = strlen(lpfcinfobuf);
896                 snprintf(lpfcinfobuf + len,
897                         384-len,
898                         " on PCI bus %02x device %02x irq %d",
899                         phba->pcidev->bus->number,
900                         phba->pcidev->devfn,
901                         phba->pcidev->irq);
902                 len = strlen(lpfcinfobuf);
903                 if (phba->Port[0]) {
904                         snprintf(lpfcinfobuf + len,
905                                  384-len,
906                                  " port %s",
907                                  phba->Port);
908                 }
909         }
910         return lpfcinfobuf;
911 }
912
913 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
914 {
915         unsigned long  poll_tmo_expires =
916                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
917
918         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
919                 mod_timer(&phba->fcp_poll_timer,
920                           poll_tmo_expires);
921 }
922
923 void lpfc_poll_start_timer(struct lpfc_hba * phba)
924 {
925         lpfc_poll_rearm_timer(phba);
926 }
927
928 void lpfc_poll_timeout(unsigned long ptr)
929 {
930         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
931
932         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
933                 lpfc_sli_poll_fcp_ring (phba);
934                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
935                         lpfc_poll_rearm_timer(phba);
936         }
937 }
938
939 static int
940 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
941 {
942         struct Scsi_Host  *shost = cmnd->device->host;
943         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
944         struct lpfc_hba   *phba = vport->phba;
945         struct lpfc_sli   *psli = &phba->sli;
946         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
947         struct lpfc_nodelist *ndlp = rdata->pnode;
948         struct lpfc_scsi_buf *lpfc_cmd;
949         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
950         int err;
951
952         err = fc_remote_port_chkready(rport);
953         if (err) {
954                 cmnd->result = err;
955                 goto out_fail_command;
956         }
957
958         /*
959          * Catch race where our node has transitioned, but the
960          * transport is still transitioning.
961          */
962         if (!ndlp) {
963                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
964                 goto out_fail_command;
965         }
966         lpfc_cmd = lpfc_get_scsi_buf(phba);
967         if (lpfc_cmd == NULL) {
968                 lpfc_adjust_queue_depth(phba);
969
970                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
971                                  "0707 driver's buffer pool is empty, "
972                                  "IO busied\n");
973                 goto out_host_busy;
974         }
975
976         /*
977          * Store the midlayer's command structure for the completion phase
978          * and complete the command initialization.
979          */
980         lpfc_cmd->pCmd  = cmnd;
981         lpfc_cmd->rdata = rdata;
982         lpfc_cmd->timeout = 0;
983         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
984         cmnd->scsi_done = done;
985
986         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
987         if (err)
988                 goto out_host_busy_free_buf;
989
990         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
991
992         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
993                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
994         if (err)
995                 goto out_host_busy_free_buf;
996
997         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
998                 lpfc_sli_poll_fcp_ring(phba);
999                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1000                         lpfc_poll_rearm_timer(phba);
1001         }
1002
1003         return 0;
1004
1005  out_host_busy_free_buf:
1006         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1007         lpfc_release_scsi_buf(phba, lpfc_cmd);
1008  out_host_busy:
1009         return SCSI_MLQUEUE_HOST_BUSY;
1010
1011  out_fail_command:
1012         done(cmnd);
1013         return 0;
1014 }
1015
1016 static void
1017 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1018 {
1019         struct Scsi_Host *shost = cmnd->device->host;
1020         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1021
1022         spin_lock_irq(shost->host_lock);
1023         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1024                 spin_unlock_irq(shost->host_lock);
1025                 msleep(1000);
1026                 spin_lock_irq(shost->host_lock);
1027         }
1028         spin_unlock_irq(shost->host_lock);
1029         return;
1030 }
1031
1032 static int
1033 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1034 {
1035         struct Scsi_Host  *shost = cmnd->device->host;
1036         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1037         struct lpfc_hba   *phba = vport->phba;
1038         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1039         struct lpfc_iocbq *iocb;
1040         struct lpfc_iocbq *abtsiocb;
1041         struct lpfc_scsi_buf *lpfc_cmd;
1042         IOCB_t *cmd, *icmd;
1043         int ret = SUCCESS;
1044         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1045
1046         lpfc_block_error_handler(cmnd);
1047         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1048         BUG_ON(!lpfc_cmd);
1049
1050         /*
1051          * If pCmd field of the corresponding lpfc_scsi_buf structure
1052          * points to a different SCSI command, then the driver has
1053          * already completed this command, but the midlayer did not
1054          * see the completion before the eh fired.  Just return
1055          * SUCCESS.
1056          */
1057         iocb = &lpfc_cmd->cur_iocbq;
1058         if (lpfc_cmd->pCmd != cmnd)
1059                 goto out;
1060
1061         BUG_ON(iocb->context1 != lpfc_cmd);
1062
1063         abtsiocb = lpfc_sli_get_iocbq(phba);
1064         if (abtsiocb == NULL) {
1065                 ret = FAILED;
1066                 goto out;
1067         }
1068
1069         /*
1070          * The scsi command can not be in txq and it is in flight because the
1071          * pCmd is still pointig at the SCSI command we have to abort. There
1072          * is no need to search the txcmplq. Just send an abort to the FW.
1073          */
1074
1075         cmd = &iocb->iocb;
1076         icmd = &abtsiocb->iocb;
1077         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1078         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1079         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1080
1081         icmd->ulpLe = 1;
1082         icmd->ulpClass = cmd->ulpClass;
1083         if (lpfc_is_link_up(phba))
1084                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1085         else
1086                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1087
1088         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1089         abtsiocb->vport = vport;
1090         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1091                 lpfc_sli_release_iocbq(phba, abtsiocb);
1092                 ret = FAILED;
1093                 goto out;
1094         }
1095
1096         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1097                 lpfc_sli_poll_fcp_ring (phba);
1098
1099         lpfc_cmd->waitq = &waitq;
1100         /* Wait for abort to complete */
1101         wait_event_timeout(waitq,
1102                           (lpfc_cmd->pCmd != cmnd),
1103                            (2*vport->cfg_devloss_tmo*HZ));
1104
1105         spin_lock_irq(shost->host_lock);
1106         lpfc_cmd->waitq = NULL;
1107         spin_unlock_irq(shost->host_lock);
1108
1109         if (lpfc_cmd->pCmd == cmnd) {
1110                 ret = FAILED;
1111                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1112                                  "0748 abort handler timed out waiting "
1113                                  "for abort to complete: ret %#x, ID %d, "
1114                                  "LUN %d, snum %#lx\n",
1115                                  ret, cmnd->device->id, cmnd->device->lun,
1116                                  cmnd->serial_number);
1117         }
1118
1119  out:
1120         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1121                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1122                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1123                          cmnd->device->lun, cmnd->serial_number);
1124         return ret;
1125 }
1126
1127 static int
1128 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1129 {
1130         struct Scsi_Host  *shost = cmnd->device->host;
1131         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1132         struct lpfc_hba   *phba = vport->phba;
1133         struct lpfc_scsi_buf *lpfc_cmd;
1134         struct lpfc_iocbq *iocbq, *iocbqrsp;
1135         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1136         struct lpfc_nodelist *pnode = rdata->pnode;
1137         uint32_t cmd_result = 0, cmd_status = 0;
1138         int ret = FAILED;
1139         int iocb_status = IOCB_SUCCESS;
1140         int cnt, loopcnt;
1141
1142         lpfc_block_error_handler(cmnd);
1143         loopcnt = 0;
1144         /*
1145          * If target is not in a MAPPED state, delay the reset until
1146          * target is rediscovered or devloss timeout expires.
1147          */
1148         while (1) {
1149                 if (!pnode)
1150                         goto out;
1151
1152                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1153                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1154                         loopcnt++;
1155                         rdata = cmnd->device->hostdata;
1156                         if (!rdata ||
1157                                 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1158                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1159                                                  "0721 LUN Reset rport "
1160                                                  "failure: cnt x%x rdata x%p\n",
1161                                                  loopcnt, rdata);
1162                                 goto out;
1163                         }
1164                         pnode = rdata->pnode;
1165                         if (!pnode)
1166                                 goto out;
1167                 }
1168                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1169                         break;
1170         }
1171
1172         lpfc_cmd = lpfc_get_scsi_buf(phba);
1173         if (lpfc_cmd == NULL)
1174                 goto out;
1175
1176         lpfc_cmd->timeout = 60;
1177         lpfc_cmd->rdata = rdata;
1178
1179         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1180                                            FCP_TARGET_RESET);
1181         if (!ret)
1182                 goto out_free_scsi_buf;
1183
1184         iocbq = &lpfc_cmd->cur_iocbq;
1185
1186         /* get a buffer for this IOCB command response */
1187         iocbqrsp = lpfc_sli_get_iocbq(phba);
1188         if (iocbqrsp == NULL)
1189                 goto out_free_scsi_buf;
1190
1191         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1192                          "0703 Issue target reset to TGT %d LUN %d "
1193                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1194                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1195         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1196                                        &phba->sli.ring[phba->sli.fcp_ring],
1197                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1198
1199         if (iocb_status == IOCB_TIMEDOUT)
1200                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1201
1202         if (iocb_status == IOCB_SUCCESS)
1203                 ret = SUCCESS;
1204         else
1205                 ret = iocb_status;
1206
1207         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1208         cmd_status = iocbqrsp->iocb.ulpStatus;
1209
1210         lpfc_sli_release_iocbq(phba, iocbqrsp);
1211
1212         /*
1213          * All outstanding txcmplq I/Os should have been aborted by the device.
1214          * Unfortunately, some targets do not abide by this forcing the driver
1215          * to double check.
1216          */
1217         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1218                                 LPFC_CTX_LUN);
1219         if (cnt)
1220                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1221                                     cmnd->device->id, cmnd->device->lun,
1222                                     LPFC_CTX_LUN);
1223         loopcnt = 0;
1224         while(cnt) {
1225                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1226
1227                 if (++loopcnt
1228                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1229                         break;
1230
1231                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1232                                         cmnd->device->lun, LPFC_CTX_LUN);
1233         }
1234
1235         if (cnt) {
1236                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1237                                  "0719 device reset I/O flush failure: "
1238                                  "cnt x%x\n", cnt);
1239                 ret = FAILED;
1240         }
1241
1242 out_free_scsi_buf:
1243         if (iocb_status != IOCB_TIMEDOUT) {
1244                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1245         }
1246         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1247                          "0713 SCSI layer issued device reset (%d, %d) "
1248                          "return x%x status x%x result x%x\n",
1249                          cmnd->device->id, cmnd->device->lun, ret,
1250                          cmd_status, cmd_result);
1251 out:
1252         return ret;
1253 }
1254
1255 static int
1256 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1257 {
1258         struct Scsi_Host  *shost = cmnd->device->host;
1259         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1260         struct lpfc_hba   *phba = vport->phba;
1261         struct lpfc_nodelist *ndlp = NULL;
1262         int match;
1263         int ret = FAILED, i, err_count = 0;
1264         int cnt, loopcnt;
1265         struct lpfc_scsi_buf * lpfc_cmd;
1266
1267         lpfc_block_error_handler(cmnd);
1268
1269         lpfc_cmd = lpfc_get_scsi_buf(phba);
1270         if (lpfc_cmd == NULL)
1271                 goto out;
1272
1273         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1274         lpfc_cmd->timeout = 60;
1275
1276         /*
1277          * Since the driver manages a single bus device, reset all
1278          * targets known to the driver.  Should any target reset
1279          * fail, this routine returns failure to the midlayer.
1280          */
1281         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1282                 /* Search for mapped node by target ID */
1283                 match = 0;
1284                 spin_lock_irq(shost->host_lock);
1285                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1286                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1287                             i == ndlp->nlp_sid &&
1288                             ndlp->rport) {
1289                                 match = 1;
1290                                 break;
1291                         }
1292                 }
1293                 spin_unlock_irq(shost->host_lock);
1294                 if (!match)
1295                         continue;
1296
1297                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1298                                           cmnd->device->lun,
1299                                           ndlp->rport->dd_data);
1300                 if (ret != SUCCESS) {
1301                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1302                                          "0700 Bus Reset on target %d failed\n",
1303                                          i);
1304                         err_count++;
1305                         break;
1306                 }
1307         }
1308
1309         if (ret != IOCB_TIMEDOUT)
1310                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1311
1312         if (err_count == 0)
1313                 ret = SUCCESS;
1314         else
1315                 ret = FAILED;
1316
1317         /*
1318          * All outstanding txcmplq I/Os should have been aborted by
1319          * the targets.  Unfortunately, some targets do not abide by
1320          * this forcing the driver to double check.
1321          */
1322         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1323         if (cnt)
1324                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1325                                     0, 0, LPFC_CTX_HOST);
1326         loopcnt = 0;
1327         while(cnt) {
1328                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1329
1330                 if (++loopcnt
1331                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1332                         break;
1333
1334                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1335         }
1336
1337         if (cnt) {
1338                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1339                                  "0715 Bus Reset I/O flush failure: "
1340                                  "cnt x%x left x%x\n", cnt, i);
1341                 ret = FAILED;
1342         }
1343
1344         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1345                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1346 out:
1347         return ret;
1348 }
1349
1350 static int
1351 lpfc_slave_alloc(struct scsi_device *sdev)
1352 {
1353         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1354         struct lpfc_hba   *phba = vport->phba;
1355         struct lpfc_scsi_buf *scsi_buf = NULL;
1356         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1357         uint32_t total = 0, i;
1358         uint32_t num_to_alloc = 0;
1359         unsigned long flags;
1360
1361         if (!rport || fc_remote_port_chkready(rport))
1362                 return -ENXIO;
1363
1364         sdev->hostdata = rport->dd_data;
1365
1366         /*
1367          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1368          * available list of scsi buffers.  Don't allocate more than the
1369          * HBA limit conveyed to the midlayer via the host structure.  The
1370          * formula accounts for the lun_queue_depth + error handlers + 1
1371          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1372          */
1373         total = phba->total_scsi_bufs;
1374         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1375
1376         /* Allow some exchanges to be available always to complete discovery */
1377         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1378                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1379                                  "0704 At limitation of %d preallocated "
1380                                  "command buffers\n", total);
1381                 return 0;
1382         /* Allow some exchanges to be available always to complete discovery */
1383         } else if (total + num_to_alloc >
1384                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1385                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1386                                  "0705 Allocation request of %d "
1387                                  "command buffers will exceed max of %d.  "
1388                                  "Reducing allocation request to %d.\n",
1389                                  num_to_alloc, phba->cfg_hba_queue_depth,
1390                                  (phba->cfg_hba_queue_depth - total));
1391                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1392         }
1393
1394         for (i = 0; i < num_to_alloc; i++) {
1395                 scsi_buf = lpfc_new_scsi_buf(vport);
1396                 if (!scsi_buf) {
1397                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1398                                          "0706 Failed to allocate "
1399                                          "command buffer\n");
1400                         break;
1401                 }
1402
1403                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1404                 phba->total_scsi_bufs++;
1405                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1406                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1407         }
1408         return 0;
1409 }
1410
1411 static int
1412 lpfc_slave_configure(struct scsi_device *sdev)
1413 {
1414         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1415         struct lpfc_hba   *phba = vport->phba;
1416         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1417
1418         if (sdev->tagged_supported)
1419                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1420         else
1421                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1422
1423         /*
1424          * Initialize the fc transport attributes for the target
1425          * containing this scsi device.  Also note that the driver's
1426          * target pointer is stored in the starget_data for the
1427          * driver's sysfs entry point functions.
1428          */
1429         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1430
1431         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1432                 lpfc_sli_poll_fcp_ring(phba);
1433                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1434                         lpfc_poll_rearm_timer(phba);
1435         }
1436
1437         return 0;
1438 }
1439
1440 static void
1441 lpfc_slave_destroy(struct scsi_device *sdev)
1442 {
1443         sdev->hostdata = NULL;
1444         return;
1445 }
1446
1447
1448 struct scsi_host_template lpfc_template = {
1449         .module                 = THIS_MODULE,
1450         .name                   = LPFC_DRIVER_NAME,
1451         .info                   = lpfc_info,
1452         .queuecommand           = lpfc_queuecommand,
1453         .eh_abort_handler       = lpfc_abort_handler,
1454         .eh_device_reset_handler= lpfc_device_reset_handler,
1455         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1456         .slave_alloc            = lpfc_slave_alloc,
1457         .slave_configure        = lpfc_slave_configure,
1458         .slave_destroy          = lpfc_slave_destroy,
1459         .scan_finished          = lpfc_scan_finished,
1460         .this_id                = -1,
1461         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1462         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1463         .use_clustering         = ENABLE_CLUSTERING,
1464         .shost_attrs            = lpfc_hba_attrs,
1465         .max_sectors            = 0xFFFF,
1466 };
1467
1468 struct scsi_host_template lpfc_vport_template = {
1469         .module                 = THIS_MODULE,
1470         .name                   = LPFC_DRIVER_NAME,
1471         .info                   = lpfc_info,
1472         .queuecommand           = lpfc_queuecommand,
1473         .eh_abort_handler       = lpfc_abort_handler,
1474         .eh_device_reset_handler= lpfc_device_reset_handler,
1475         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1476         .slave_alloc            = lpfc_slave_alloc,
1477         .slave_configure        = lpfc_slave_configure,
1478         .slave_destroy          = lpfc_slave_destroy,
1479         .scan_finished          = lpfc_scan_finished,
1480         .this_id                = -1,
1481         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1482         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1483         .use_clustering         = ENABLE_CLUSTERING,
1484         .shost_attrs            = lpfc_vport_attrs,
1485         .max_sectors            = 0xFFFF,
1486 };