err.no Git - linux-2.6/blob - 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) 2004-2008 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 || !NLP_CHK_NODE_ACT(pnode)
 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 && NLP_CHK_NODE_ACT(pnode) &&
 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 &&
 658             NLP_CHK_NODE_ACT(pnode)) {
 659                 pnode->last_q_full_time = jiffies;
 660
 661                 shost_for_each_device(tmp_sdev, sdev->host) {
 662                         if (tmp_sdev->id != sdev->id)
 663                                 continue;
 664                         depth = scsi_track_queue_full(tmp_sdev,
 665                                         tmp_sdev->queue_depth - 1);
 666                 }
 667                 /*
 668                  * The queue depth cannot be lowered any more.
 669                  * Modify the returned error code to store
 670                  * the final depth value set by
 671                  * scsi_track_queue_full.
 672                  */
 673                 if (depth == -1)
 674                         depth = sdev->host->cmd_per_lun;
 675
 676                 if (depth) {
 677                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 678                                          "0711 detected queue full - lun queue "
 679                                          "depth adjusted to %d.\n", depth);
 680                 }
 681         }
 682
 683         /*
 684          * If there is a thread waiting for command completion
 685          * wake up the thread.
 686          */
 687         spin_lock_irqsave(sdev->host->host_lock, flags);
 688         lpfc_cmd->pCmd = NULL;
 689         if (lpfc_cmd->waitq)
 690                 wake_up(lpfc_cmd->waitq);
 691         spin_unlock_irqrestore(sdev->host->host_lock, flags);
 692
 693         lpfc_release_scsi_buf(phba, lpfc_cmd);
 694 }
 695
 696 static void
 697 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 698                     struct lpfc_nodelist *pnode)
 699 {
 700         struct lpfc_hba *phba = vport->phba;
 701         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 702         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 703         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 704         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 705         int datadir = scsi_cmnd->sc_data_direction;
 706         char tag[2];
 707
 708         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
 709                 return;
 710
 711         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 712         /* clear task management bits */
 713         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 714
 715         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 716                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 717
 718         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 719
 720         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
 721                 switch (tag[0]) {
 722                 case HEAD_OF_QUEUE_TAG:
 723                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 724                         break;
 725                 case ORDERED_QUEUE_TAG:
 726                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 727                         break;
 728                 default:
 729                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 730                         break;
 731                 }
 732         } else
 733                 fcp_cmnd->fcpCntl1 = 0;
 734
 735         /*
 736          * There are three possibilities here - use scatter-gather segment, use
 737          * the single mapping, or neither.  Start the lpfc command prep by
 738          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 739          * data bde entry.
 740          */
 741         if (scsi_sg_count(scsi_cmnd)) {
 742                 if (datadir == DMA_TO_DEVICE) {
 743                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 744                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 745                         iocb_cmd->ulpPU = 0;
 746                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 747                         phba->fc4OutputRequests++;
 748                 } else {
 749                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 750                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 751                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 752                         fcp_cmnd->fcpCntl3 = READ_DATA;
 753                         phba->fc4InputRequests++;
 754                 }
 755         } else {
 756                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 757                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 758                 iocb_cmd->ulpPU = 0;
 759                 fcp_cmnd->fcpCntl3 = 0;
 760                 phba->fc4ControlRequests++;
 761         }
 762
 763         /*
 764          * Finish initializing those IOCB fields that are independent
 765          * of the scsi_cmnd request_buffer
 766          */
 767         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 768         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 769                 piocbq->iocb.ulpFCP2Rcvy = 1;
 770         else
 771                 piocbq->iocb.ulpFCP2Rcvy = 0;
 772
 773         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 774         piocbq->context1  = lpfc_cmd;
 775         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 776         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 777         piocbq->vport = vport;
 778 }
 779
 780 static int
 781 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
 782                              struct lpfc_scsi_buf *lpfc_cmd,
 783                              unsigned int lun,
 784                              uint8_t task_mgmt_cmd)
 785 {
 786         struct lpfc_iocbq *piocbq;
 787         IOCB_t *piocb;
 788         struct fcp_cmnd *fcp_cmnd;
 789         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 790         struct lpfc_nodelist *ndlp = rdata->pnode;
 791
 792         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
 793             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
 794                 return 0;
 795
 796         piocbq = &(lpfc_cmd->cur_iocbq);
 797         piocbq->vport = vport;
 798
 799         piocb = &piocbq->iocb;
 800
 801         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 802         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 803         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 804
 805         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 806
 807         piocb->ulpContext = ndlp->nlp_rpi;
 808         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 809                 piocb->ulpFCP2Rcvy = 1;
 810         }
 811         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 812
 813         /* ulpTimeout is only one byte */
 814         if (lpfc_cmd->timeout > 0xff) {
 815                 /*
 816                  * Do not timeout the command at the firmware level.
 817                  * The driver will provide the timeout mechanism.
 818                  */
 819                 piocb->ulpTimeout = 0;
 820         } else {
 821                 piocb->ulpTimeout = lpfc_cmd->timeout;
 822         }
 823
 824         return 1;
 825 }
 826
 827 static void
 828 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 829                         struct lpfc_iocbq *cmdiocbq,
 830                         struct lpfc_iocbq *rspiocbq)
 831 {
 832         struct lpfc_scsi_buf *lpfc_cmd =
 833                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
 834         if (lpfc_cmd)
 835                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 836         return;
 837 }
 838
 839 static int
 840 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 841                     unsigned  tgt_id, unsigned int lun,
 842                     struct lpfc_rport_data *rdata)
 843 {
 844         struct lpfc_hba   *phba = vport->phba;
 845         struct lpfc_iocbq *iocbq;
 846         struct lpfc_iocbq *iocbqrsp;
 847         int ret;
 848
 849         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
 850                 return FAILED;
 851
 852         lpfc_cmd->rdata = rdata;
 853         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 854                                            FCP_TARGET_RESET);
 855         if (!ret)
 856                 return FAILED;
 857
 858         iocbq = &lpfc_cmd->cur_iocbq;
 859         iocbqrsp = lpfc_sli_get_iocbq(phba);
 860
 861         if (!iocbqrsp)
 862                 return FAILED;
 863
 864         /* Issue Target Reset to TGT <num> */
 865         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 866                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
 867                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 868         ret = lpfc_sli_issue_iocb_wait(phba,
 869                                        &phba->sli.ring[phba->sli.fcp_ring],
 870                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 871         if (ret != IOCB_SUCCESS) {
 872                 if (ret == IOCB_TIMEDOUT)
 873                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
 874                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 875         } else {
 876                 ret = SUCCESS;
 877                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 878                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 879                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 880                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 881                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 882         }
 883
 884         lpfc_sli_release_iocbq(phba, iocbqrsp);
 885         return ret;
 886 }
 887
 888 const char *
 889 lpfc_info(struct Scsi_Host *host)
 890 {
 891         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
 892         struct lpfc_hba   *phba = vport->phba;
 893         int len;
 894         static char  lpfcinfobuf[384];
 895
 896         memset(lpfcinfobuf,0,384);
 897         if (phba && phba->pcidev){
 898                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 899                 len = strlen(lpfcinfobuf);
 900                 snprintf(lpfcinfobuf + len,
 901                         384-len,
 902                         " on PCI bus %02x device %02x irq %d",
 903                         phba->pcidev->bus->number,
 904                         phba->pcidev->devfn,
 905                         phba->pcidev->irq);
 906                 len = strlen(lpfcinfobuf);
 907                 if (phba->Port[0]) {
 908                         snprintf(lpfcinfobuf + len,
 909                                  384-len,
 910                                  " port %s",
 911                                  phba->Port);
 912                 }
 913         }
 914         return lpfcinfobuf;
 915 }
 916
 917 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 918 {
 919         unsigned long  poll_tmo_expires =
 920                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 921
 922         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 923                 mod_timer(&phba->fcp_poll_timer,
 924                           poll_tmo_expires);
 925 }
 926
 927 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 928 {
 929         lpfc_poll_rearm_timer(phba);
 930 }
 931
 932 void lpfc_poll_timeout(unsigned long ptr)
 933 {
 934         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
 935
 936         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 937                 lpfc_sli_poll_fcp_ring (phba);
 938                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 939                         lpfc_poll_rearm_timer(phba);
 940         }
 941 }
 942
 943 static int
 944 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 945 {
 946         struct Scsi_Host  *shost = cmnd->device->host;
 947         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 948         struct lpfc_hba   *phba = vport->phba;
 949         struct lpfc_sli   *psli = &phba->sli;
 950         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 951         struct lpfc_nodelist *ndlp = rdata->pnode;
 952         struct lpfc_scsi_buf *lpfc_cmd;
 953         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 954         int err;
 955
 956         err = fc_remote_port_chkready(rport);
 957         if (err) {
 958                 cmnd->result = err;
 959                 goto out_fail_command;
 960         }
 961
 962         /*
 963          * Catch race where our node has transitioned, but the
 964          * transport is still transitioning.
 965          */
 966         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 967                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 968                 goto out_fail_command;
 969         }
 970         lpfc_cmd = lpfc_get_scsi_buf(phba);
 971         if (lpfc_cmd == NULL) {
 972                 lpfc_adjust_queue_depth(phba);
 973
 974                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 975                                  "0707 driver's buffer pool is empty, "
 976                                  "IO busied\n");
 977                 goto out_host_busy;
 978         }
 979
 980         /*
 981          * Store the midlayer's command structure for the completion phase
 982          * and complete the command initialization.
 983          */
 984         lpfc_cmd->pCmd  = cmnd;
 985         lpfc_cmd->rdata = rdata;
 986         lpfc_cmd->timeout = 0;
 987         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 988         cmnd->scsi_done = done;
 989
 990         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 991         if (err)
 992                 goto out_host_busy_free_buf;
 993
 994         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
 995
 996         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 997                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 998         if (err)
 999                 goto out_host_busy_free_buf;
1000
1001         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1002                 lpfc_sli_poll_fcp_ring(phba);
1003                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1004                         lpfc_poll_rearm_timer(phba);
1005         }
1006
1007         return 0;
1008
1009  out_host_busy_free_buf:
1010         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1011         lpfc_release_scsi_buf(phba, lpfc_cmd);
1012  out_host_busy:
1013         return SCSI_MLQUEUE_HOST_BUSY;
1014
1015  out_fail_command:
1016         done(cmnd);
1017         return 0;
1018 }
1019
1020 static void
1021 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1022 {
1023         struct Scsi_Host *shost = cmnd->device->host;
1024         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1025
1026         spin_lock_irq(shost->host_lock);
1027         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1028                 spin_unlock_irq(shost->host_lock);
1029                 msleep(1000);
1030                 spin_lock_irq(shost->host_lock);
1031         }
1032         spin_unlock_irq(shost->host_lock);
1033         return;
1034 }
1035
1036 static int
1037 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1038 {
1039         struct Scsi_Host  *shost = cmnd->device->host;
1040         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1041         struct lpfc_hba   *phba = vport->phba;
1042         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1043         struct lpfc_iocbq *iocb;
1044         struct lpfc_iocbq *abtsiocb;
1045         struct lpfc_scsi_buf *lpfc_cmd;
1046         IOCB_t *cmd, *icmd;
1047         int ret = SUCCESS;
1048         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1049
1050         lpfc_block_error_handler(cmnd);
1051         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1052         BUG_ON(!lpfc_cmd);
1053
1054         /*
1055          * If pCmd field of the corresponding lpfc_scsi_buf structure
1056          * points to a different SCSI command, then the driver has
1057          * already completed this command, but the midlayer did not
1058          * see the completion before the eh fired.  Just return
1059          * SUCCESS.
1060          */
1061         iocb = &lpfc_cmd->cur_iocbq;
1062         if (lpfc_cmd->pCmd != cmnd)
1063                 goto out;
1064
1065         BUG_ON(iocb->context1 != lpfc_cmd);
1066
1067         abtsiocb = lpfc_sli_get_iocbq(phba);
1068         if (abtsiocb == NULL) {
1069                 ret = FAILED;
1070                 goto out;
1071         }
1072
1073         /*
1074          * The scsi command can not be in txq and it is in flight because the
1075          * pCmd is still pointig at the SCSI command we have to abort. There
1076          * is no need to search the txcmplq. Just send an abort to the FW.
1077          */
1078
1079         cmd = &iocb->iocb;
1080         icmd = &abtsiocb->iocb;
1081         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1082         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1083         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1084
1085         icmd->ulpLe = 1;
1086         icmd->ulpClass = cmd->ulpClass;
1087         if (lpfc_is_link_up(phba))
1088                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1089         else
1090                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1091
1092         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1093         abtsiocb->vport = vport;
1094         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1095                 lpfc_sli_release_iocbq(phba, abtsiocb);
1096                 ret = FAILED;
1097                 goto out;
1098         }
1099
1100         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1101                 lpfc_sli_poll_fcp_ring (phba);
1102
1103         lpfc_cmd->waitq = &waitq;
1104         /* Wait for abort to complete */
1105         wait_event_timeout(waitq,
1106                           (lpfc_cmd->pCmd != cmnd),
1107                            (2*vport->cfg_devloss_tmo*HZ));
1108
1109         spin_lock_irq(shost->host_lock);
1110         lpfc_cmd->waitq = NULL;
1111         spin_unlock_irq(shost->host_lock);
1112
1113         if (lpfc_cmd->pCmd == cmnd) {
1114                 ret = FAILED;
1115                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1116                                  "0748 abort handler timed out waiting "
1117                                  "for abort to complete: ret %#x, ID %d, "
1118                                  "LUN %d, snum %#lx\n",
1119                                  ret, cmnd->device->id, cmnd->device->lun,
1120                                  cmnd->serial_number);
1121         }
1122
1123  out:
1124         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1125                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1126                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1127                          cmnd->device->lun, cmnd->serial_number);
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 || !NLP_CHK_NODE_ACT(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 > ((vport->cfg_devloss_tmo * 2) + 1))){
1162                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1163                                                  "0721 LUN Reset rport "
1164                                                  "failure: cnt x%x rdata x%p\n",
1165                                                  loopcnt, rdata);
1166                                 goto out;
1167                         }
1168                         pnode = rdata->pnode;
1169                         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1170                                 goto out;
1171                 }
1172                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1173                         break;
1174         }
1175
1176         lpfc_cmd = lpfc_get_scsi_buf(phba);
1177         if (lpfc_cmd == NULL)
1178                 goto out;
1179
1180         lpfc_cmd->timeout = 60;
1181         lpfc_cmd->rdata = rdata;
1182
1183         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1184                                            FCP_TARGET_RESET);
1185         if (!ret)
1186                 goto out_free_scsi_buf;
1187
1188         iocbq = &lpfc_cmd->cur_iocbq;
1189
1190         /* get a buffer for this IOCB command response */
1191         iocbqrsp = lpfc_sli_get_iocbq(phba);
1192         if (iocbqrsp == NULL)
1193                 goto out_free_scsi_buf;
1194
1195         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1196                          "0703 Issue target reset to TGT %d LUN %d "
1197                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1198                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1199         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1200                                        &phba->sli.ring[phba->sli.fcp_ring],
1201                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1202
1203         if (iocb_status == IOCB_TIMEDOUT)
1204                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1205
1206         if (iocb_status == IOCB_SUCCESS)
1207                 ret = SUCCESS;
1208         else
1209                 ret = iocb_status;
1210
1211         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1212         cmd_status = iocbqrsp->iocb.ulpStatus;
1213
1214         lpfc_sli_release_iocbq(phba, iocbqrsp);
1215
1216         /*
1217          * All outstanding txcmplq I/Os should have been aborted by the device.
1218          * Unfortunately, some targets do not abide by this forcing the driver
1219          * to double check.
1220          */
1221         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1222                                 LPFC_CTX_LUN);
1223         if (cnt)
1224                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1225                                     cmnd->device->id, cmnd->device->lun,
1226                                     LPFC_CTX_LUN);
1227         loopcnt = 0;
1228         while(cnt) {
1229                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1230
1231                 if (++loopcnt
1232                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1233                         break;
1234
1235                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1236                                         cmnd->device->lun, LPFC_CTX_LUN);
1237         }
1238
1239         if (cnt) {
1240                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1241                                  "0719 device reset I/O flush failure: "
1242                                  "cnt x%x\n", cnt);
1243                 ret = FAILED;
1244         }
1245
1246 out_free_scsi_buf:
1247         if (iocb_status != IOCB_TIMEDOUT) {
1248                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1249         }
1250         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1251                          "0713 SCSI layer issued device reset (%d, %d) "
1252                          "return x%x status x%x result x%x\n",
1253                          cmnd->device->id, cmnd->device->lun, ret,
1254                          cmd_status, cmd_result);
1255 out:
1256         return ret;
1257 }
1258
1259 static int
1260 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1261 {
1262         struct Scsi_Host  *shost = cmnd->device->host;
1263         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1264         struct lpfc_hba   *phba = vport->phba;
1265         struct lpfc_nodelist *ndlp = NULL;
1266         int match;
1267         int ret = FAILED, i, err_count = 0;
1268         int cnt, loopcnt;
1269         struct lpfc_scsi_buf * lpfc_cmd;
1270
1271         lpfc_block_error_handler(cmnd);
1272
1273         lpfc_cmd = lpfc_get_scsi_buf(phba);
1274         if (lpfc_cmd == NULL)
1275                 goto out;
1276
1277         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1278         lpfc_cmd->timeout = 60;
1279
1280         /*
1281          * Since the driver manages a single bus device, reset all
1282          * targets known to the driver.  Should any target reset
1283          * fail, this routine returns failure to the midlayer.
1284          */
1285         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1286                 /* Search for mapped node by target ID */
1287                 match = 0;
1288                 spin_lock_irq(shost->host_lock);
1289                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1290                         if (!NLP_CHK_NODE_ACT(ndlp))
1291                                 continue;
1292                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1293                             i == ndlp->nlp_sid &&
1294                             ndlp->rport) {
1295                                 match = 1;
1296                                 break;
1297                         }
1298                 }
1299                 spin_unlock_irq(shost->host_lock);
1300                 if (!match)
1301                         continue;
1302
1303                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1304                                           cmnd->device->lun,
1305                                           ndlp->rport->dd_data);
1306                 if (ret != SUCCESS) {
1307                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1308                                          "0700 Bus Reset on target %d failed\n",
1309                                          i);
1310                         err_count++;
1311                         break;
1312                 }
1313         }
1314
1315         if (ret != IOCB_TIMEDOUT)
1316                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1317
1318         if (err_count == 0)
1319                 ret = SUCCESS;
1320         else
1321                 ret = FAILED;
1322
1323         /*
1324          * All outstanding txcmplq I/Os should have been aborted by
1325          * the targets.  Unfortunately, some targets do not abide by
1326          * this forcing the driver to double check.
1327          */
1328         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1329         if (cnt)
1330                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1331                                     0, 0, LPFC_CTX_HOST);
1332         loopcnt = 0;
1333         while(cnt) {
1334                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1335
1336                 if (++loopcnt
1337                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1338                         break;
1339
1340                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1341         }
1342
1343         if (cnt) {
1344                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1345                                  "0715 Bus Reset I/O flush failure: "
1346                                  "cnt x%x left x%x\n", cnt, i);
1347                 ret = FAILED;
1348         }
1349
1350         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1351                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1352 out:
1353         return ret;
1354 }
1355
1356 static int
1357 lpfc_slave_alloc(struct scsi_device *sdev)
1358 {
1359         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1360         struct lpfc_hba   *phba = vport->phba;
1361         struct lpfc_scsi_buf *scsi_buf = NULL;
1362         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1363         uint32_t total = 0, i;
1364         uint32_t num_to_alloc = 0;
1365         unsigned long flags;
1366
1367         if (!rport || fc_remote_port_chkready(rport))
1368                 return -ENXIO;
1369
1370         sdev->hostdata = rport->dd_data;
1371
1372         /*
1373          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1374          * available list of scsi buffers.  Don't allocate more than the
1375          * HBA limit conveyed to the midlayer via the host structure.  The
1376          * formula accounts for the lun_queue_depth + error handlers + 1
1377          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1378          */
1379         total = phba->total_scsi_bufs;
1380         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1381
1382         /* Allow some exchanges to be available always to complete discovery */
1383         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1384                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1385                                  "0704 At limitation of %d preallocated "
1386                                  "command buffers\n", total);
1387                 return 0;
1388         /* Allow some exchanges to be available always to complete discovery */
1389         } else if (total + num_to_alloc >
1390                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1391                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1392                                  "0705 Allocation request of %d "
1393                                  "command buffers will exceed max of %d.  "
1394                                  "Reducing allocation request to %d.\n",
1395                                  num_to_alloc, phba->cfg_hba_queue_depth,
1396                                  (phba->cfg_hba_queue_depth - total));
1397                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1398         }
1399
1400         for (i = 0; i < num_to_alloc; i++) {
1401                 scsi_buf = lpfc_new_scsi_buf(vport);
1402                 if (!scsi_buf) {
1403                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1404                                          "0706 Failed to allocate "
1405                                          "command buffer\n");
1406                         break;
1407                 }
1408
1409                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1410                 phba->total_scsi_bufs++;
1411                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1412                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1413         }
1414         return 0;
1415 }
1416
1417 static int
1418 lpfc_slave_configure(struct scsi_device *sdev)
1419 {
1420         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1421         struct lpfc_hba   *phba = vport->phba;
1422         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1423
1424         if (sdev->tagged_supported)
1425                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1426         else
1427                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1428
1429         /*
1430          * Initialize the fc transport attributes for the target
1431          * containing this scsi device.  Also note that the driver's
1432          * target pointer is stored in the starget_data for the
1433          * driver's sysfs entry point functions.
1434          */
1435         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1436
1437         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1438                 lpfc_sli_poll_fcp_ring(phba);
1439                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1440                         lpfc_poll_rearm_timer(phba);
1441         }
1442
1443         return 0;
1444 }
1445
1446 static void
1447 lpfc_slave_destroy(struct scsi_device *sdev)
1448 {
1449         sdev->hostdata = NULL;
1450         return;
1451 }
1452
1453
1454 struct scsi_host_template lpfc_template = {
1455         .module                 = THIS_MODULE,
1456         .name                   = LPFC_DRIVER_NAME,
1457         .info                   = lpfc_info,
1458         .queuecommand           = lpfc_queuecommand,
1459         .eh_abort_handler       = lpfc_abort_handler,
1460         .eh_device_reset_handler= lpfc_device_reset_handler,
1461         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1462         .slave_alloc            = lpfc_slave_alloc,
1463         .slave_configure        = lpfc_slave_configure,
1464         .slave_destroy          = lpfc_slave_destroy,
1465         .scan_finished          = lpfc_scan_finished,
1466         .this_id                = -1,
1467         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1468         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1469         .use_clustering         = ENABLE_CLUSTERING,
1470         .shost_attrs            = lpfc_hba_attrs,
1471         .max_sectors            = 0xFFFF,
1472 };
1473
1474 struct scsi_host_template lpfc_vport_template = {
1475         .module                 = THIS_MODULE,
1476         .name                   = LPFC_DRIVER_NAME,
1477         .info                   = lpfc_info,
1478         .queuecommand           = lpfc_queuecommand,
1479         .eh_abort_handler       = lpfc_abort_handler,
1480         .eh_device_reset_handler= lpfc_device_reset_handler,
1481         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1482         .slave_alloc            = lpfc_slave_alloc,
1483         .slave_configure        = lpfc_slave_configure,
1484         .slave_destroy          = lpfc_slave_destroy,
1485         .scan_finished          = lpfc_scan_finished,
1486         .this_id                = -1,
1487         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1488         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1489         .use_clustering         = ENABLE_CLUSTERING,
1490         .shost_attrs            = lpfc_vport_attrs,
1491         .max_sectors            = 0xFFFF,
1492 };