Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...
[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_hba *phba,
88                         struct scsi_device *sdev)
89 {
90         unsigned long flags;
91         atomic_inc(&phba->num_cmd_success);
92
93         if (phba->cfg_lun_queue_depth <= sdev->queue_depth)
94                 return;
95
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
103         phba->last_ramp_up_time = jiffies;
104         spin_unlock_irqrestore(&phba->hbalock, flags);
105
106         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
107         if ((phba->pport->work_port_events &
108                 WORKER_RAMP_UP_QUEUE) == 0) {
109                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
110         }
111         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
112
113         spin_lock_irqsave(&phba->hbalock, flags);
114         if (phba->work_wait)
115                 wake_up(phba->work_wait);
116         spin_unlock_irqrestore(&phba->hbalock, flags);
117 }
118
119 void
120 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
121 {
122         struct lpfc_vport *vport;
123         struct Scsi_Host  *host;
124         struct scsi_device *sdev;
125         unsigned long new_queue_depth;
126         unsigned long num_rsrc_err, num_cmd_success;
127
128         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
129         num_cmd_success = atomic_read(&phba->num_cmd_success);
130
131         spin_lock_irq(&phba->hbalock);
132         list_for_each_entry(vport, &phba->port_list, listentry) {
133                 host = lpfc_shost_from_vport(vport);
134                 if (!scsi_host_get(host))
135                         continue;
136
137                 spin_unlock_irq(&phba->hbalock);
138
139                 shost_for_each_device(sdev, host) {
140                         new_queue_depth = sdev->queue_depth * num_rsrc_err /
141                         (num_rsrc_err + num_cmd_success);
142                         if (!new_queue_depth)
143                                 new_queue_depth = sdev->queue_depth - 1;
144                         else
145                                 new_queue_depth =
146                                         sdev->queue_depth - new_queue_depth;
147
148                         if (sdev->ordered_tags)
149                                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
150                                         new_queue_depth);
151                         else
152                                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
153                                         new_queue_depth);
154                 }
155                 spin_lock_irq(&phba->hbalock);
156                 scsi_host_put(host);
157         }
158         spin_unlock_irq(&phba->hbalock);
159         atomic_set(&phba->num_rsrc_err, 0);
160         atomic_set(&phba->num_cmd_success, 0);
161 }
162
163 void
164 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
165 {
166         struct lpfc_vport *vport;
167         struct Scsi_Host  *host;
168         struct scsi_device *sdev;
169
170         spin_lock_irq(&phba->hbalock);
171         list_for_each_entry(vport, &phba->port_list, listentry) {
172                 host = lpfc_shost_from_vport(vport);
173                 if (!scsi_host_get(host))
174                         continue;
175
176                 spin_unlock_irq(&phba->hbalock);
177                 shost_for_each_device(sdev, host) {
178                         if (sdev->ordered_tags)
179                                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
180                                         sdev->queue_depth+1);
181                         else
182                                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
183                                         sdev->queue_depth+1);
184                 }
185                 spin_lock_irq(&phba->hbalock);
186                 scsi_host_put(host);
187         }
188         spin_unlock_irq(&phba->hbalock);
189         atomic_set(&phba->num_rsrc_err, 0);
190         atomic_set(&phba->num_cmd_success, 0);
191 }
192
193 /*
194  * This routine allocates a scsi buffer, which contains all the necessary
195  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
196  * contains information to build the IOCB.  The DMAable region contains
197  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
198  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
199  * and the BPL BDE is setup in the IOCB.
200  */
201 static struct lpfc_scsi_buf *
202 lpfc_new_scsi_buf(struct lpfc_vport *vport)
203 {
204         struct lpfc_hba *phba = vport->phba;
205         struct lpfc_scsi_buf *psb;
206         struct ulp_bde64 *bpl;
207         IOCB_t *iocb;
208         dma_addr_t pdma_phys;
209         uint16_t iotag;
210
211         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
212         if (!psb)
213                 return NULL;
214         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
215
216         /*
217          * Get memory from the pci pool to map the virt space to pci bus space
218          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
219          * struct fcp_rsp and the number of bde's necessary to support the
220          * sg_tablesize.
221          */
222         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
223                                                         &psb->dma_handle);
224         if (!psb->data) {
225                 kfree(psb);
226                 return NULL;
227         }
228
229         /* Initialize virtual ptrs to dma_buf region. */
230         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
231
232         /* Allocate iotag for psb->cur_iocbq. */
233         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
234         if (iotag == 0) {
235                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
236                               psb->data, psb->dma_handle);
237                 kfree (psb);
238                 return NULL;
239         }
240         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
241
242         psb->fcp_cmnd = psb->data;
243         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
244         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
245                                                         sizeof(struct fcp_rsp);
246
247         /* Initialize local short-hand pointers. */
248         bpl = psb->fcp_bpl;
249         pdma_phys = psb->dma_handle;
250
251         /*
252          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
253          * list bdes.  Initialize the first two and leave the rest for
254          * queuecommand.
255          */
256         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
257         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
258         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
259         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
260         bpl->tus.w = le32_to_cpu(bpl->tus.w);
261         bpl++;
262
263         /* Setup the physical region for the FCP RSP */
264         pdma_phys += sizeof (struct fcp_cmnd);
265         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
266         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
267         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
268         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
269         bpl->tus.w = le32_to_cpu(bpl->tus.w);
270
271         /*
272          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
273          * initialize it with all known data now.
274          */
275         pdma_phys += (sizeof (struct fcp_rsp));
276         iocb = &psb->cur_iocbq.iocb;
277         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
278         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
279         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
280         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
281         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
282         iocb->ulpBdeCount = 1;
283         iocb->ulpClass = CLASS3;
284
285         return psb;
286 }
287
288 static struct lpfc_scsi_buf*
289 lpfc_get_scsi_buf(struct lpfc_hba * phba)
290 {
291         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
292         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
293         unsigned long iflag = 0;
294
295         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
296         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
297         if (lpfc_cmd) {
298                 lpfc_cmd->seg_cnt = 0;
299                 lpfc_cmd->nonsg_phys = 0;
300         }
301         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
302         return  lpfc_cmd;
303 }
304
305 static void
306 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
307 {
308         unsigned long iflag = 0;
309
310         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
311         psb->pCmd = NULL;
312         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
313         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
314 }
315
316 static int
317 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
318 {
319         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
320         struct scatterlist *sgel = NULL;
321         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
322         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
323         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
324         dma_addr_t physaddr;
325         uint32_t i, num_bde = 0;
326         int nseg, datadir = scsi_cmnd->sc_data_direction;
327
328         /*
329          * There are three possibilities here - use scatter-gather segment, use
330          * the single mapping, or neither.  Start the lpfc command prep by
331          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
332          * data bde entry.
333          */
334         bpl += 2;
335         if (scsi_sg_count(scsi_cmnd)) {
336                 /*
337                  * The driver stores the segment count returned from pci_map_sg
338                  * because this a count of dma-mappings used to map the use_sg
339                  * pages.  They are not guaranteed to be the same for those
340                  * architectures that implement an IOMMU.
341                  */
342
343                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
344                                   scsi_sg_count(scsi_cmnd), datadir);
345                 if (unlikely(!nseg))
346                         return 1;
347
348                 lpfc_cmd->seg_cnt = nseg;
349                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
350                         printk(KERN_ERR "%s: Too many sg segments from "
351                                "dma_map_sg.  Config %d, seg_cnt %d",
352                                __FUNCTION__, phba->cfg_sg_seg_cnt,
353                                lpfc_cmd->seg_cnt);
354                         scsi_dma_unmap(scsi_cmnd);
355                         return 1;
356                 }
357
358                 /*
359                  * The driver established a maximum scatter-gather segment count
360                  * during probe that limits the number of sg elements in any
361                  * single scsi command.  Just run through the seg_cnt and format
362                  * the bde's.
363                  */
364                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, i) {
365                         physaddr = sg_dma_address(sgel);
366                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
367                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
368                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
369                         if (datadir == DMA_TO_DEVICE)
370                                 bpl->tus.f.bdeFlags = 0;
371                         else
372                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
373                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
374                         bpl++;
375                         num_bde++;
376                 }
377         }
378
379         /*
380          * Finish initializing those IOCB fields that are dependent on the
381          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
382          * reinitialized since all iocb memory resources are used many times
383          * for transmit, receive, and continuation bpl's.
384          */
385         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
386         iocb_cmd->un.fcpi64.bdl.bdeSize +=
387                 (num_bde * sizeof (struct ulp_bde64));
388         iocb_cmd->ulpBdeCount = 1;
389         iocb_cmd->ulpLe = 1;
390         fcp_cmnd->fcpDl = be32_to_cpu(scsi_bufflen(scsi_cmnd));
391         return 0;
392 }
393
394 static void
395 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
396 {
397         /*
398          * There are only two special cases to consider.  (1) the scsi command
399          * requested scatter-gather usage or (2) the scsi command allocated
400          * a request buffer, but did not request use_sg.  There is a third
401          * case, but it does not require resource deallocation.
402          */
403         if (psb->seg_cnt > 0)
404                 scsi_dma_unmap(psb->pCmd);
405 }
406
407 static void
408 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
409                     struct lpfc_iocbq *rsp_iocb)
410 {
411         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
412         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
413         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
414         struct lpfc_hba *phba = vport->phba;
415         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
416         uint32_t vpi = vport->vpi;
417         uint32_t resp_info = fcprsp->rspStatus2;
418         uint32_t scsi_status = fcprsp->rspStatus3;
419         uint32_t *lp;
420         uint32_t host_status = DID_OK;
421         uint32_t rsplen = 0;
422         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
423
424         /*
425          *  If this is a task management command, there is no
426          *  scsi packet associated with this lpfc_cmd.  The driver
427          *  consumes it.
428          */
429         if (fcpcmd->fcpCntl2) {
430                 scsi_status = 0;
431                 goto out;
432         }
433
434         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
435                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
436                 if (snslen > SCSI_SENSE_BUFFERSIZE)
437                         snslen = SCSI_SENSE_BUFFERSIZE;
438
439                 if (resp_info & RSP_LEN_VALID)
440                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
441                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
442         }
443         lp = (uint32_t *)cmnd->sense_buffer;
444
445         if (!scsi_status && (resp_info & RESID_UNDER))
446                 logit = LOG_FCP;
447
448         lpfc_printf_log(phba, KERN_WARNING, logit,
449                         "%d (%d):0730 FCP command x%x failed: x%x SNS x%x x%x "
450                         "Data: x%x x%x x%x x%x x%x\n",
451                         phba->brd_no, vpi, cmnd->cmnd[0], scsi_status,
452                         be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
453                         be32_to_cpu(fcprsp->rspResId),
454                         be32_to_cpu(fcprsp->rspSnsLen),
455                         be32_to_cpu(fcprsp->rspRspLen),
456                         fcprsp->rspInfo3);
457
458         if (resp_info & RSP_LEN_VALID) {
459                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
460                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
461                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
462                         host_status = DID_ERROR;
463                         goto out;
464                 }
465         }
466
467         scsi_set_resid(cmnd, 0);
468         if (resp_info & RESID_UNDER) {
469                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
470
471                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
472                                 "%d (%d):0716 FCP Read Underrun, expected %d, "
473                                 "residual %d Data: x%x x%x x%x\n",
474                                 phba->brd_no, vpi, be32_to_cpu(fcpcmd->fcpDl),
475                                 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
476                                 cmnd->underflow);
477
478                 /*
479                  * If there is an under run check if under run reported by
480                  * storage array is same as the under run reported by HBA.
481                  * If this is not same, there is a dropped frame.
482                  */
483                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
484                         fcpi_parm &&
485                         (scsi_get_resid(cmnd) != fcpi_parm)) {
486                         lpfc_printf_log(phba, KERN_WARNING,
487                                         LOG_FCP | LOG_FCP_ERROR,
488                                         "%d (%d):0735 FCP Read Check Error "
489                                         "and Underrun Data: x%x x%x x%x x%x\n",
490                                         phba->brd_no, vpi,
491                                         be32_to_cpu(fcpcmd->fcpDl),
492                                         scsi_get_resid(cmnd), fcpi_parm,
493                                         cmnd->cmnd[0]);
494                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
495                         host_status = DID_ERROR;
496                 }
497                 /*
498                  * The cmnd->underflow is the minimum number of bytes that must
499                  * be transfered for this command.  Provided a sense condition
500                  * is not present, make sure the actual amount transferred is at
501                  * least the underflow value or fail.
502                  */
503                 if (!(resp_info & SNS_LEN_VALID) &&
504                     (scsi_status == SAM_STAT_GOOD) &&
505                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
506                      < cmnd->underflow)) {
507                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
508                                         "%d (%d):0717 FCP command x%x residual "
509                                         "underrun converted to error "
510                                         "Data: x%x x%x x%x\n",
511                                         phba->brd_no, vpi, cmnd->cmnd[0],
512                                         scsi_bufflen(cmnd),
513                                         scsi_get_resid(cmnd), cmnd->underflow);
514                         host_status = DID_ERROR;
515                 }
516         } else if (resp_info & RESID_OVER) {
517                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
518                                 "%d (%d):0720 FCP command x%x residual "
519                                 "overrun error. Data: x%x x%x \n",
520                                 phba->brd_no, vpi, cmnd->cmnd[0],
521                                 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
522                 host_status = DID_ERROR;
523
524         /*
525          * Check SLI validation that all the transfer was actually done
526          * (fcpi_parm should be zero). Apply check only to reads.
527          */
528         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
529                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
530                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
531                                 "%d (%d):0734 FCP Read Check Error Data: "
532                                 "x%x x%x x%x x%x\n",
533                                 phba->brd_no, vpi,
534                                 be32_to_cpu(fcpcmd->fcpDl),
535                                 be32_to_cpu(fcprsp->rspResId),
536                                 fcpi_parm, cmnd->cmnd[0]);
537                 host_status = DID_ERROR;
538                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
539         }
540
541  out:
542         cmnd->result = ScsiResult(host_status, scsi_status);
543 }
544
545 static void
546 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
547                         struct lpfc_iocbq *pIocbOut)
548 {
549         struct lpfc_scsi_buf *lpfc_cmd =
550                 (struct lpfc_scsi_buf *) pIocbIn->context1;
551         struct lpfc_vport      *vport = pIocbIn->vport;
552         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
553         struct lpfc_nodelist *pnode = rdata->pnode;
554         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
555         uint32_t vpi = (lpfc_cmd->cur_iocbq.vport
556                         ? lpfc_cmd->cur_iocbq.vport->vpi
557                         : 0);
558         int result;
559         struct scsi_device *sdev, *tmp_sdev;
560         int depth = 0;
561
562         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
563         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
564
565         if (lpfc_cmd->status) {
566                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
567                     (lpfc_cmd->result & IOERR_DRVR_MASK))
568                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
569                 else if (lpfc_cmd->status >= IOSTAT_CNT)
570                         lpfc_cmd->status = IOSTAT_DEFAULT;
571
572                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
573                                 "%d (%d):0729 FCP cmd x%x failed <%d/%d> "
574                                 "status: x%x result: x%x Data: x%x x%x\n",
575                                 phba->brd_no, vpi, cmd->cmnd[0],
576                                 cmd->device ? cmd->device->id : 0xffff,
577                                 cmd->device ? cmd->device->lun : 0xffff,
578                                 lpfc_cmd->status, lpfc_cmd->result,
579                                 pIocbOut->iocb.ulpContext,
580                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
581
582                 switch (lpfc_cmd->status) {
583                 case IOSTAT_FCP_RSP_ERROR:
584                         /* Call FCP RSP handler to determine result */
585                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
586                         break;
587                 case IOSTAT_NPORT_BSY:
588                 case IOSTAT_FABRIC_BSY:
589                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
590                         break;
591                 case IOSTAT_LOCAL_REJECT:
592                         if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
593                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
594                             lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
595                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
596                         break;
597                 } /* else: fall through */
598                 default:
599                         cmd->result = ScsiResult(DID_ERROR, 0);
600                         break;
601                 }
602
603                 if ((pnode == NULL )
604                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
605                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
606         } else {
607                 cmd->result = ScsiResult(DID_OK, 0);
608         }
609
610         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
611                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
612
613                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
614                                 "%d (%d):0710 Iodone <%d/%d> cmd %p, error "
615                                 "x%x SNS x%x x%x Data: x%x x%x\n",
616                                 phba->brd_no, vpi, cmd->device->id,
617                                 cmd->device->lun, cmd, cmd->result,
618                                 *lp, *(lp + 3), cmd->retries,
619                                 scsi_get_resid(cmd));
620         }
621
622         result = cmd->result;
623         sdev = cmd->device;
624         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
625         cmd->scsi_done(cmd);
626
627         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
628                 lpfc_release_scsi_buf(phba, lpfc_cmd);
629                 return;
630         }
631
632
633         if (!result)
634                 lpfc_rampup_queue_depth(phba, sdev);
635
636         if (!result && pnode != NULL &&
637            ((jiffies - pnode->last_ramp_up_time) >
638                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
639            ((jiffies - pnode->last_q_full_time) >
640                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
641            (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
642                 shost_for_each_device(tmp_sdev, sdev->host) {
643                         if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
644                                 if (tmp_sdev->id != sdev->id)
645                                         continue;
646                                 if (tmp_sdev->ordered_tags)
647                                         scsi_adjust_queue_depth(tmp_sdev,
648                                                 MSG_ORDERED_TAG,
649                                                 tmp_sdev->queue_depth+1);
650                                 else
651                                         scsi_adjust_queue_depth(tmp_sdev,
652                                                 MSG_SIMPLE_TAG,
653                                                 tmp_sdev->queue_depth+1);
654
655                                 pnode->last_ramp_up_time = jiffies;
656                         }
657                 }
658         }
659
660         /*
661          * Check for queue full.  If the lun is reporting queue full, then
662          * back off the lun queue depth to prevent target overloads.
663          */
664         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
665                 pnode->last_q_full_time = jiffies;
666
667                 shost_for_each_device(tmp_sdev, sdev->host) {
668                         if (tmp_sdev->id != sdev->id)
669                                 continue;
670                         depth = scsi_track_queue_full(tmp_sdev,
671                                         tmp_sdev->queue_depth - 1);
672                 }
673                 /*
674                  * The queue depth cannot be lowered any more.
675                  * Modify the returned error code to store
676                  * the final depth value set by
677                  * scsi_track_queue_full.
678                  */
679                 if (depth == -1)
680                         depth = sdev->host->cmd_per_lun;
681
682                 if (depth) {
683                         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
684                                         "%d (%d):0711 detected queue full - "
685                                         "lun queue depth  adjusted to %d.\n",
686                                         phba->brd_no, vpi, depth);
687                 }
688         }
689
690         lpfc_release_scsi_buf(phba, lpfc_cmd);
691 }
692
693 static void
694 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
695                     struct lpfc_nodelist *pnode)
696 {
697         struct lpfc_hba *phba = vport->phba;
698         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
699         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
700         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
701         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
702         int datadir = scsi_cmnd->sc_data_direction;
703
704         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
705         /* clear task management bits */
706         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
707
708         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
709                         &lpfc_cmd->fcp_cmnd->fcp_lun);
710
711         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
712
713         if (scsi_cmnd->device->tagged_supported) {
714                 switch (scsi_cmnd->tag) {
715                 case HEAD_OF_QUEUE_TAG:
716                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
717                         break;
718                 case ORDERED_QUEUE_TAG:
719                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
720                         break;
721                 default:
722                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
723                         break;
724                 }
725         } else
726                 fcp_cmnd->fcpCntl1 = 0;
727
728         /*
729          * There are three possibilities here - use scatter-gather segment, use
730          * the single mapping, or neither.  Start the lpfc command prep by
731          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
732          * data bde entry.
733          */
734         if (scsi_sg_count(scsi_cmnd)) {
735                 if (datadir == DMA_TO_DEVICE) {
736                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
737                         iocb_cmd->un.fcpi.fcpi_parm = 0;
738                         iocb_cmd->ulpPU = 0;
739                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
740                         phba->fc4OutputRequests++;
741                 } else {
742                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
743                         iocb_cmd->ulpPU = PARM_READ_CHECK;
744                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
745                         fcp_cmnd->fcpCntl3 = READ_DATA;
746                         phba->fc4InputRequests++;
747                 }
748         } else {
749                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
750                 iocb_cmd->un.fcpi.fcpi_parm = 0;
751                 iocb_cmd->ulpPU = 0;
752                 fcp_cmnd->fcpCntl3 = 0;
753                 phba->fc4ControlRequests++;
754         }
755
756         /*
757          * Finish initializing those IOCB fields that are independent
758          * of the scsi_cmnd request_buffer
759          */
760         piocbq->iocb.ulpContext = pnode->nlp_rpi;
761         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
762                 piocbq->iocb.ulpFCP2Rcvy = 1;
763
764         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
765         piocbq->context1  = lpfc_cmd;
766         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
767         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
768         piocbq->vport = vport;
769 }
770
771 static int
772 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
773                              struct lpfc_scsi_buf *lpfc_cmd,
774                              unsigned int lun,
775                              uint8_t task_mgmt_cmd)
776 {
777         struct lpfc_iocbq *piocbq;
778         IOCB_t *piocb;
779         struct fcp_cmnd *fcp_cmnd;
780         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
781         struct lpfc_nodelist *ndlp = rdata->pnode;
782
783         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
784                 return 0;
785         }
786
787         piocbq = &(lpfc_cmd->cur_iocbq);
788         piocbq->vport = vport;
789
790         piocb = &piocbq->iocb;
791
792         fcp_cmnd = lpfc_cmd->fcp_cmnd;
793         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
794         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
795
796         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
797
798         piocb->ulpContext = ndlp->nlp_rpi;
799         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
800                 piocb->ulpFCP2Rcvy = 1;
801         }
802         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
803
804         /* ulpTimeout is only one byte */
805         if (lpfc_cmd->timeout > 0xff) {
806                 /*
807                  * Do not timeout the command at the firmware level.
808                  * The driver will provide the timeout mechanism.
809                  */
810                 piocb->ulpTimeout = 0;
811         } else {
812                 piocb->ulpTimeout = lpfc_cmd->timeout;
813         }
814
815         return 1;
816 }
817
818 static void
819 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
820                         struct lpfc_iocbq *cmdiocbq,
821                         struct lpfc_iocbq *rspiocbq)
822 {
823         struct lpfc_scsi_buf *lpfc_cmd =
824                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
825         if (lpfc_cmd)
826                 lpfc_release_scsi_buf(phba, lpfc_cmd);
827         return;
828 }
829
830 static int
831 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
832                     unsigned  tgt_id, unsigned int lun,
833                     struct lpfc_rport_data *rdata)
834 {
835         struct lpfc_hba   *phba = vport->phba;
836         struct lpfc_iocbq *iocbq;
837         struct lpfc_iocbq *iocbqrsp;
838         int ret;
839
840         if (!rdata->pnode)
841                 return FAILED;
842
843         lpfc_cmd->rdata = rdata;
844         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
845                                            FCP_TARGET_RESET);
846         if (!ret)
847                 return FAILED;
848
849         iocbq = &lpfc_cmd->cur_iocbq;
850         iocbqrsp = lpfc_sli_get_iocbq(phba);
851
852         if (!iocbqrsp)
853                 return FAILED;
854
855         /* Issue Target Reset to TGT <num> */
856         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
857                         "%d (%d):0702 Issue Target Reset to TGT %d "
858                         "Data: x%x x%x\n",
859                         phba->brd_no, vport->vpi, tgt_id,
860                         rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
861
862         ret = lpfc_sli_issue_iocb_wait(phba,
863                                        &phba->sli.ring[phba->sli.fcp_ring],
864                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
865         if (ret != IOCB_SUCCESS) {
866                 if (ret == IOCB_TIMEDOUT)
867                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
868                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
869         } else {
870                 ret = SUCCESS;
871                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
872                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
873                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
874                         (lpfc_cmd->result & IOERR_DRVR_MASK))
875                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
876         }
877
878         lpfc_sli_release_iocbq(phba, iocbqrsp);
879         return ret;
880 }
881
882 const char *
883 lpfc_info(struct Scsi_Host *host)
884 {
885         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
886         struct lpfc_hba   *phba = vport->phba;
887         int len;
888         static char  lpfcinfobuf[384];
889
890         memset(lpfcinfobuf,0,384);
891         if (phba && phba->pcidev){
892                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
893                 len = strlen(lpfcinfobuf);
894                 snprintf(lpfcinfobuf + len,
895                         384-len,
896                         " on PCI bus %02x device %02x irq %d",
897                         phba->pcidev->bus->number,
898                         phba->pcidev->devfn,
899                         phba->pcidev->irq);
900                 len = strlen(lpfcinfobuf);
901                 if (phba->Port[0]) {
902                         snprintf(lpfcinfobuf + len,
903                                  384-len,
904                                  " port %s",
905                                  phba->Port);
906                 }
907         }
908         return lpfcinfobuf;
909 }
910
911 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
912 {
913         unsigned long  poll_tmo_expires =
914                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
915
916         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
917                 mod_timer(&phba->fcp_poll_timer,
918                           poll_tmo_expires);
919 }
920
921 void lpfc_poll_start_timer(struct lpfc_hba * phba)
922 {
923         lpfc_poll_rearm_timer(phba);
924 }
925
926 void lpfc_poll_timeout(unsigned long ptr)
927 {
928         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
929
930         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
931                 lpfc_sli_poll_fcp_ring (phba);
932                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
933                         lpfc_poll_rearm_timer(phba);
934         }
935 }
936
937 static int
938 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
939 {
940         struct Scsi_Host  *shost = cmnd->device->host;
941         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
942         struct lpfc_hba   *phba = vport->phba;
943         struct lpfc_sli   *psli = &phba->sli;
944         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
945         struct lpfc_nodelist *ndlp = rdata->pnode;
946         struct lpfc_scsi_buf *lpfc_cmd;
947         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
948         int err;
949
950         err = fc_remote_port_chkready(rport);
951         if (err) {
952                 cmnd->result = err;
953                 goto out_fail_command;
954         }
955
956         /*
957          * Catch race where our node has transitioned, but the
958          * transport is still transitioning.
959          */
960         if (!ndlp) {
961                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
962                 goto out_fail_command;
963         }
964         lpfc_cmd = lpfc_get_scsi_buf(phba);
965         if (lpfc_cmd == NULL) {
966                 lpfc_adjust_queue_depth(phba);
967
968                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
969                                 "%d (%d):0707 driver's buffer pool is empty, "
970                                 "IO busied\n",
971                                 phba->brd_no, vport->vpi);
972                 goto out_host_busy;
973         }
974
975         /*
976          * Store the midlayer's command structure for the completion phase
977          * and complete the command initialization.
978          */
979         lpfc_cmd->pCmd  = cmnd;
980         lpfc_cmd->rdata = rdata;
981         lpfc_cmd->timeout = 0;
982         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
983         cmnd->scsi_done = done;
984
985         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
986         if (err)
987                 goto out_host_busy_free_buf;
988
989         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
990
991         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
992                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
993         if (err)
994                 goto out_host_busy_free_buf;
995
996         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
997                 lpfc_sli_poll_fcp_ring(phba);
998                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
999                         lpfc_poll_rearm_timer(phba);
1000         }
1001
1002         return 0;
1003
1004  out_host_busy_free_buf:
1005         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1006         lpfc_release_scsi_buf(phba, lpfc_cmd);
1007  out_host_busy:
1008         return SCSI_MLQUEUE_HOST_BUSY;
1009
1010  out_fail_command:
1011         done(cmnd);
1012         return 0;
1013 }
1014
1015 static void
1016 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1017 {
1018         struct Scsi_Host *shost = cmnd->device->host;
1019         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1020
1021         spin_lock_irq(shost->host_lock);
1022         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1023                 spin_unlock_irq(shost->host_lock);
1024                 msleep(1000);
1025                 spin_lock_irq(shost->host_lock);
1026         }
1027         spin_unlock_irq(shost->host_lock);
1028         return;
1029 }
1030
1031 static int
1032 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1033 {
1034         struct Scsi_Host  *shost = cmnd->device->host;
1035         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1036         struct lpfc_hba   *phba = vport->phba;
1037         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1038         struct lpfc_iocbq *iocb;
1039         struct lpfc_iocbq *abtsiocb;
1040         struct lpfc_scsi_buf *lpfc_cmd;
1041         IOCB_t *cmd, *icmd;
1042         unsigned int loop_count = 0;
1043         int ret = SUCCESS;
1044
1045         lpfc_block_error_handler(cmnd);
1046         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1047         BUG_ON(!lpfc_cmd);
1048
1049         /*
1050          * If pCmd field of the corresponding lpfc_scsi_buf structure
1051          * points to a different SCSI command, then the driver has
1052          * already completed this command, but the midlayer did not
1053          * see the completion before the eh fired.  Just return
1054          * SUCCESS.
1055          */
1056         iocb = &lpfc_cmd->cur_iocbq;
1057         if (lpfc_cmd->pCmd != cmnd)
1058                 goto out;
1059
1060         BUG_ON(iocb->context1 != lpfc_cmd);
1061
1062         abtsiocb = lpfc_sli_get_iocbq(phba);
1063         if (abtsiocb == NULL) {
1064                 ret = FAILED;
1065                 goto out;
1066         }
1067
1068         /*
1069          * The scsi command can not be in txq and it is in flight because the
1070          * pCmd is still pointig at the SCSI command we have to abort. There
1071          * is no need to search the txcmplq. Just send an abort to the FW.
1072          */
1073
1074         cmd = &iocb->iocb;
1075         icmd = &abtsiocb->iocb;
1076         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1077         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1078         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1079
1080         icmd->ulpLe = 1;
1081         icmd->ulpClass = cmd->ulpClass;
1082         if (lpfc_is_link_up(phba))
1083                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1084         else
1085                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1086
1087         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1088         abtsiocb->vport = vport;
1089         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1090                 lpfc_sli_release_iocbq(phba, abtsiocb);
1091                 ret = FAILED;
1092                 goto out;
1093         }
1094
1095         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1096                 lpfc_sli_poll_fcp_ring (phba);
1097
1098         /* Wait for abort to complete */
1099         while (lpfc_cmd->pCmd == cmnd)
1100         {
1101                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1102                         lpfc_sli_poll_fcp_ring (phba);
1103
1104                 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT * HZ);
1105                 if (++loop_count
1106                     > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
1107                         break;
1108         }
1109
1110         if (lpfc_cmd->pCmd == cmnd) {
1111                 ret = FAILED;
1112                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1113                                 "%d (%d):0748 abort handler timed out waiting "
1114                                 "for abort to complete: ret %#x, ID %d, "
1115                                 "LUN %d, snum %#lx\n",
1116                                 phba->brd_no, vport->vpi, ret,
1117                                 cmnd->device->id, cmnd->device->lun,
1118                                 cmnd->serial_number);
1119         }
1120
1121  out:
1122         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1123                         "%d (%d):0749 SCSI Layer I/O Abort Request "
1124                         "Status x%x ID %d LUN %d snum %#lx\n",
1125                         phba->brd_no, vport->vpi, ret, cmnd->device->id,
1126                         cmnd->device->lun, cmnd->serial_number);
1127
1128         return ret;
1129 }
1130
1131 static int
1132 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1133 {
1134         struct Scsi_Host  *shost = cmnd->device->host;
1135         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1136         struct lpfc_hba   *phba = vport->phba;
1137         struct lpfc_scsi_buf *lpfc_cmd;
1138         struct lpfc_iocbq *iocbq, *iocbqrsp;
1139         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1140         struct lpfc_nodelist *pnode = rdata->pnode;
1141         uint32_t cmd_result = 0, cmd_status = 0;
1142         int ret = FAILED;
1143         int iocb_status = IOCB_SUCCESS;
1144         int cnt, loopcnt;
1145
1146         lpfc_block_error_handler(cmnd);
1147         loopcnt = 0;
1148         /*
1149          * If target is not in a MAPPED state, delay the reset until
1150          * target is rediscovered or devloss timeout expires.
1151          */
1152         while (1) {
1153                 if (!pnode)
1154                         goto out;
1155
1156                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1157                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1158                         loopcnt++;
1159                         rdata = cmnd->device->hostdata;
1160                         if (!rdata ||
1161                                 (loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
1162                                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1163                                                 "%d (%d):0721 LUN Reset rport "
1164                                                 "failure: cnt x%x rdata x%p\n",
1165                                                 phba->brd_no, vport->vpi,
1166                                                 loopcnt, rdata);
1167                                 goto out;
1168                         }
1169                         pnode = rdata->pnode;
1170                         if (!pnode)
1171                                 goto out;
1172                 }
1173                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1174                         break;
1175         }
1176
1177         lpfc_cmd = lpfc_get_scsi_buf(phba);
1178         if (lpfc_cmd == NULL)
1179                 goto out;
1180
1181         lpfc_cmd->timeout = 60;
1182         lpfc_cmd->rdata = rdata;
1183
1184         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1185                                            FCP_TARGET_RESET);
1186         if (!ret)
1187                 goto out_free_scsi_buf;
1188
1189         iocbq = &lpfc_cmd->cur_iocbq;
1190
1191         /* get a buffer for this IOCB command response */
1192         iocbqrsp = lpfc_sli_get_iocbq(phba);
1193         if (iocbqrsp == NULL)
1194                 goto out_free_scsi_buf;
1195
1196         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1197                         "%d (%d):0703 Issue target reset to TGT %d LUN %d "
1198                         "rpi x%x nlp_flag x%x\n",
1199                         phba->brd_no, vport->vpi, cmnd->device->id,
1200                         cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1201
1202         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1203                                        &phba->sli.ring[phba->sli.fcp_ring],
1204                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1205
1206         if (iocb_status == IOCB_TIMEDOUT)
1207                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1208
1209         if (iocb_status == IOCB_SUCCESS)
1210                 ret = SUCCESS;
1211         else
1212                 ret = iocb_status;
1213
1214         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1215         cmd_status = iocbqrsp->iocb.ulpStatus;
1216
1217         lpfc_sli_release_iocbq(phba, iocbqrsp);
1218
1219         /*
1220          * All outstanding txcmplq I/Os should have been aborted by the device.
1221          * Unfortunately, some targets do not abide by this forcing the driver
1222          * to double check.
1223          */
1224         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1225                                 cmnd->device->id, cmnd->device->lun,
1226                                 LPFC_CTX_LUN);
1227         if (cnt)
1228                 lpfc_sli_abort_iocb(phba,
1229                                     &phba->sli.ring[phba->sli.fcp_ring],
1230                                     cmnd->device->id, cmnd->device->lun,
1231                                     0, LPFC_CTX_LUN);
1232         loopcnt = 0;
1233         while(cnt) {
1234                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1235
1236                 if (++loopcnt
1237                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1238                         break;
1239
1240                 cnt = lpfc_sli_sum_iocb(phba,
1241                                         &phba->sli.ring[phba->sli.fcp_ring],
1242                                         cmnd->device->id, cmnd->device->lun,
1243                                         LPFC_CTX_LUN);
1244         }
1245
1246         if (cnt) {
1247                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1248                                 "%d (%d):0719 device reset I/O flush failure: "
1249                                 "cnt x%x\n",
1250                                 phba->brd_no, vport->vpi, cnt);
1251                 ret = FAILED;
1252         }
1253
1254 out_free_scsi_buf:
1255         if (iocb_status != IOCB_TIMEDOUT) {
1256                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1257         }
1258         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1259                         "%d (%d):0713 SCSI layer issued device reset (%d, %d) "
1260                         "return x%x status x%x result x%x\n",
1261                         phba->brd_no, vport->vpi, cmnd->device->id,
1262                         cmnd->device->lun, ret, cmd_status, cmd_result);
1263
1264 out:
1265         return ret;
1266 }
1267
1268 static int
1269 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1270 {
1271         struct Scsi_Host  *shost = cmnd->device->host;
1272         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1273         struct lpfc_hba   *phba = vport->phba;
1274         struct lpfc_nodelist *ndlp = NULL;
1275         int match;
1276         int ret = FAILED, i, err_count = 0;
1277         int cnt, loopcnt;
1278         struct lpfc_scsi_buf * lpfc_cmd;
1279
1280         lpfc_block_error_handler(cmnd);
1281
1282         lpfc_cmd = lpfc_get_scsi_buf(phba);
1283         if (lpfc_cmd == NULL)
1284                 goto out;
1285
1286         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1287         lpfc_cmd->timeout = 60;
1288
1289         /*
1290          * Since the driver manages a single bus device, reset all
1291          * targets known to the driver.  Should any target reset
1292          * fail, this routine returns failure to the midlayer.
1293          */
1294         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1295                 /* Search for mapped node by target ID */
1296                 match = 0;
1297                 spin_lock_irq(shost->host_lock);
1298                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1299                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1300                             i == ndlp->nlp_sid &&
1301                             ndlp->rport) {
1302                                 match = 1;
1303                                 break;
1304                         }
1305                 }
1306                 spin_unlock_irq(shost->host_lock);
1307                 if (!match)
1308                         continue;
1309
1310                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1311                                           cmnd->device->lun,
1312                                           ndlp->rport->dd_data);
1313                 if (ret != SUCCESS) {
1314                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1315                                         "%d (%d):0700 Bus Reset on target %d "
1316                                         "failed\n",
1317                                         phba->brd_no, vport->vpi, i);
1318                         err_count++;
1319                         break;
1320                 }
1321         }
1322
1323         if (ret != IOCB_TIMEDOUT)
1324                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1325
1326         if (err_count == 0)
1327                 ret = SUCCESS;
1328         else
1329                 ret = FAILED;
1330
1331         /*
1332          * All outstanding txcmplq I/Os should have been aborted by
1333          * the targets.  Unfortunately, some targets do not abide by
1334          * this forcing the driver to double check.
1335          */
1336         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1337                                 0, 0, LPFC_CTX_HOST);
1338         if (cnt)
1339                 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1340                                     0, 0, 0, LPFC_CTX_HOST);
1341         loopcnt = 0;
1342         while(cnt) {
1343                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1344
1345                 if (++loopcnt
1346                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1347                         break;
1348
1349                 cnt = lpfc_sli_sum_iocb(phba,
1350                                         &phba->sli.ring[phba->sli.fcp_ring],
1351                                         0, 0, LPFC_CTX_HOST);
1352         }
1353
1354         if (cnt) {
1355                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1356                                 "%d (%d):0715 Bus Reset I/O flush failure: "
1357                                 "cnt x%x left x%x\n",
1358                                 phba->brd_no, vport->vpi, cnt, i);
1359                 ret = FAILED;
1360         }
1361
1362         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1363                         "%d (%d):0714 SCSI layer issued Bus Reset Data: x%x\n",
1364                         phba->brd_no, vport->vpi, ret);
1365 out:
1366         return ret;
1367 }
1368
1369 static int
1370 lpfc_slave_alloc(struct scsi_device *sdev)
1371 {
1372         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1373         struct lpfc_hba   *phba = vport->phba;
1374         struct lpfc_scsi_buf *scsi_buf = NULL;
1375         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1376         uint32_t total = 0, i;
1377         uint32_t num_to_alloc = 0;
1378         unsigned long flags;
1379
1380         if (!rport || fc_remote_port_chkready(rport))
1381                 return -ENXIO;
1382
1383         sdev->hostdata = rport->dd_data;
1384
1385         /*
1386          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1387          * available list of scsi buffers.  Don't allocate more than the
1388          * HBA limit conveyed to the midlayer via the host structure.  The
1389          * formula accounts for the lun_queue_depth + error handlers + 1
1390          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1391          */
1392         total = phba->total_scsi_bufs;
1393         num_to_alloc = phba->cfg_lun_queue_depth + 2;
1394
1395         /* Allow some exchanges to be available always to complete discovery */
1396         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1397                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1398                                 "%d (%d):0704 At limitation of %d "
1399                                 "preallocated command buffers\n",
1400                                 phba->brd_no, vport->vpi, total);
1401                 return 0;
1402
1403         /* Allow some exchanges to be available always to complete discovery */
1404         } else if (total + num_to_alloc >
1405                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1406                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1407                                 "%d (%d):0705 Allocation request of %d "
1408                                 "command buffers will exceed max of %d.  "
1409                                 "Reducing allocation request to %d.\n",
1410                                 phba->brd_no, vport->vpi, num_to_alloc,
1411                                 phba->cfg_hba_queue_depth,
1412                                 (phba->cfg_hba_queue_depth - total));
1413                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1414         }
1415
1416         for (i = 0; i < num_to_alloc; i++) {
1417                 scsi_buf = lpfc_new_scsi_buf(vport);
1418                 if (!scsi_buf) {
1419                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1420                                         "%d (%d):0706 Failed to allocate "
1421                                         "command buffer\n",
1422                                         phba->brd_no, vport->vpi);
1423                         break;
1424                 }
1425
1426                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1427                 phba->total_scsi_bufs++;
1428                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1429                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1430         }
1431         return 0;
1432 }
1433
1434 static int
1435 lpfc_slave_configure(struct scsi_device *sdev)
1436 {
1437         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1438         struct lpfc_hba   *phba = vport->phba;
1439         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1440
1441         if (sdev->tagged_supported)
1442                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1443         else
1444                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1445
1446         /*
1447          * Initialize the fc transport attributes for the target
1448          * containing this scsi device.  Also note that the driver's
1449          * target pointer is stored in the starget_data for the
1450          * driver's sysfs entry point functions.
1451          */
1452         rport->dev_loss_tmo = phba->cfg_devloss_tmo;
1453
1454         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1455                 lpfc_sli_poll_fcp_ring(phba);
1456                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1457                         lpfc_poll_rearm_timer(phba);
1458         }
1459
1460         return 0;
1461 }
1462
1463 static void
1464 lpfc_slave_destroy(struct scsi_device *sdev)
1465 {
1466         sdev->hostdata = NULL;
1467         return;
1468 }
1469
1470
1471 struct scsi_host_template lpfc_template = {
1472         .module                 = THIS_MODULE,
1473         .name                   = LPFC_DRIVER_NAME,
1474         .info                   = lpfc_info,
1475         .queuecommand           = lpfc_queuecommand,
1476         .eh_abort_handler       = lpfc_abort_handler,
1477         .eh_device_reset_handler= lpfc_device_reset_handler,
1478         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1479         .slave_alloc            = lpfc_slave_alloc,
1480         .slave_configure        = lpfc_slave_configure,
1481         .slave_destroy          = lpfc_slave_destroy,
1482         .scan_finished          = lpfc_scan_finished,
1483         .this_id                = -1,
1484         .sg_tablesize           = LPFC_SG_SEG_CNT,
1485         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1486         .use_clustering         = ENABLE_CLUSTERING,
1487         .shost_attrs            = lpfc_hba_attrs,
1488         .max_sectors            = 0xFFFF,
1489 };