drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2007 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/delay.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_version.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_disc.h"
  36 #include "lpfc_scsi.h"
  37 #include "lpfc.h"
  38 #include "lpfc_logmsg.h"
  39 #include "lpfc_crtn.h"
  40 #include "lpfc_vport.h"
  41
  42 #define LPFC_RESET_WAIT  2
  43 #define LPFC_ABORT_WAIT  2
  44
  45 /*
  46  * This function is called with no lock held when there is a resource
  47  * error in driver or in firmware.
  48  */
  49 void
  50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
  51 {
  52         unsigned long flags;
  53
  54         spin_lock_irqsave(&phba->hbalock, flags);
  55         atomic_inc(&phba->num_rsrc_err);
  56         phba->last_rsrc_error_time = jiffies;
  57
  58         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
  59                 spin_unlock_irqrestore(&phba->hbalock, flags);
  60                 return;
  61         }
  62
  63         phba->last_ramp_down_time = jiffies;
  64
  65         spin_unlock_irqrestore(&phba->hbalock, flags);
  66
  67         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
  68         if ((phba->pport->work_port_events &
  69                 WORKER_RAMP_DOWN_QUEUE) == 0) {
  70                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
  71         }
  72         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
  73
  74         spin_lock_irqsave(&phba->hbalock, flags);
  75         if (phba->work_wait)
  76                 wake_up(phba->work_wait);
  77         spin_unlock_irqrestore(&phba->hbalock, flags);
  78
  79         return;
  80 }
  81
  82 /*
  83  * This function is called with no lock held when there is a successful
  84  * SCSI command completion.
  85  */
  86 static inline void
  87 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
  88                         struct scsi_device *sdev)
  89 {
  90         unsigned long flags;
  91         struct lpfc_hba *phba = vport->phba;
  92         atomic_inc(&phba->num_cmd_success);
  93
  94         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
  95                 return;
  96         spin_lock_irqsave(&phba->hbalock, flags);
  97         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
  98          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
  99                 spin_unlock_irqrestore(&phba->hbalock, flags);
 100                 return;
 101         }
 102         phba->last_ramp_up_time = jiffies;
 103         spin_unlock_irqrestore(&phba->hbalock, flags);
 104
 105         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 106         if ((phba->pport->work_port_events &
 107                 WORKER_RAMP_UP_QUEUE) == 0) {
 108                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 109         }
 110         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 111
 112         spin_lock_irqsave(&phba->hbalock, flags);
 113         if (phba->work_wait)
 114                 wake_up(phba->work_wait);
 115         spin_unlock_irqrestore(&phba->hbalock, flags);
 116 }
 117
 118 void
 119 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 120 {
 121         struct lpfc_vport **vports;
 122         struct Scsi_Host  *shost;
 123         struct scsi_device *sdev;
 124         unsigned long new_queue_depth;
 125         unsigned long num_rsrc_err, num_cmd_success;
 126         int i;
 127
 128         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 129         num_cmd_success = atomic_read(&phba->num_cmd_success);
 130
 131         vports = lpfc_create_vport_work_array(phba);
 132         if (vports != NULL)
 133                 for(i = 0; i < LPFC_MAX_VPORTS && 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(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 < LPFC_MAX_VPORTS && 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(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 = be32_to_cpu(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
 546         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 547         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 548
 549         if (lpfc_cmd->status) {
 550                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 551                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 552                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 553                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 554                         lpfc_cmd->status = IOSTAT_DEFAULT;
 555
 556                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 557                                  "0729 FCP cmd x%x failed <%d/%d> "
 558                                  "status: x%x result: x%x Data: x%x x%x\n",
 559                                  cmd->cmnd[0],
 560                                  cmd->device ? cmd->device->id : 0xffff,
 561                                  cmd->device ? cmd->device->lun : 0xffff,
 562                                  lpfc_cmd->status, lpfc_cmd->result,
 563                                  pIocbOut->iocb.ulpContext,
 564                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 565
 566                 switch (lpfc_cmd->status) {
 567                 case IOSTAT_FCP_RSP_ERROR:
 568                         /* Call FCP RSP handler to determine result */
 569                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 570                         break;
 571                 case IOSTAT_NPORT_BSY:
 572                 case IOSTAT_FABRIC_BSY:
 573                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 574                         break;
 575                 case IOSTAT_LOCAL_REJECT:
 576                         if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
 577                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
 578                             lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
 579                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
 580                         break;
 581                 } /* else: fall through */
 582                 default:
 583                         cmd->result = ScsiResult(DID_ERROR, 0);
 584                         break;
 585                 }
 586
 587                 if ((pnode == NULL )
 588                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 589                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 590         } else {
 591                 cmd->result = ScsiResult(DID_OK, 0);
 592         }
 593
 594         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 595                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 596
 597                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 598                                  "0710 Iodone <%d/%d> cmd %p, error "
 599                                  "x%x SNS x%x x%x Data: x%x x%x\n",
 600                                  cmd->device->id, cmd->device->lun, cmd,
 601                                  cmd->result, *lp, *(lp + 3), cmd->retries,
 602                                  scsi_get_resid(cmd));
 603         }
 604
 605         result = cmd->result;
 606         sdev = cmd->device;
 607         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 608         cmd->scsi_done(cmd);
 609
 610         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 611                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 612                 return;
 613         }
 614
 615
 616         if (!result)
 617                 lpfc_rampup_queue_depth(vport, sdev);
 618
 619         if (!result && pnode != NULL &&
 620            ((jiffies - pnode->last_ramp_up_time) >
 621                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 622            ((jiffies - pnode->last_q_full_time) >
 623                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 624            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
 625                 shost_for_each_device(tmp_sdev, sdev->host) {
 626                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
 627                                 if (tmp_sdev->id != sdev->id)
 628                                         continue;
 629                                 if (tmp_sdev->ordered_tags)
 630                                         scsi_adjust_queue_depth(tmp_sdev,
 631                                                 MSG_ORDERED_TAG,
 632                                                 tmp_sdev->queue_depth+1);
 633                                 else
 634                                         scsi_adjust_queue_depth(tmp_sdev,
 635                                                 MSG_SIMPLE_TAG,
 636                                                 tmp_sdev->queue_depth+1);
 637
 638                                 pnode->last_ramp_up_time = jiffies;
 639                         }
 640                 }
 641         }
 642
 643         /*
 644          * Check for queue full.  If the lun is reporting queue full, then
 645          * back off the lun queue depth to prevent target overloads.
 646          */
 647         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
 648                 pnode->last_q_full_time = jiffies;
 649
 650                 shost_for_each_device(tmp_sdev, sdev->host) {
 651                         if (tmp_sdev->id != sdev->id)
 652                                 continue;
 653                         depth = scsi_track_queue_full(tmp_sdev,
 654                                         tmp_sdev->queue_depth - 1);
 655                 }
 656                 /*
 657                  * The queue depth cannot be lowered any more.
 658                  * Modify the returned error code to store
 659                  * the final depth value set by
 660                  * scsi_track_queue_full.
 661                  */
 662                 if (depth == -1)
 663                         depth = sdev->host->cmd_per_lun;
 664
 665                 if (depth) {
 666                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 667                                          "0711 detected queue full - lun queue "
 668                                          "depth adjusted to %d.\n", depth);
 669                 }
 670         }
 671
 672         lpfc_release_scsi_buf(phba, lpfc_cmd);
 673 }
 674
 675 static void
 676 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 677                     struct lpfc_nodelist *pnode)
 678 {
 679         struct lpfc_hba *phba = vport->phba;
 680         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 681         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 682         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 683         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 684         int datadir = scsi_cmnd->sc_data_direction;
 685
 686         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 687         /* clear task management bits */
 688         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 689
 690         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 691                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 692
 693         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 694
 695         if (scsi_cmnd->device->tagged_supported) {
 696                 switch (scsi_cmnd->tag) {
 697                 case HEAD_OF_QUEUE_TAG:
 698                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 699                         break;
 700                 case ORDERED_QUEUE_TAG:
 701                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 702                         break;
 703                 default:
 704                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 705                         break;
 706                 }
 707         } else
 708                 fcp_cmnd->fcpCntl1 = 0;
 709
 710         /*
 711          * There are three possibilities here - use scatter-gather segment, use
 712          * the single mapping, or neither.  Start the lpfc command prep by
 713          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 714          * data bde entry.
 715          */
 716         if (scsi_sg_count(scsi_cmnd)) {
 717                 if (datadir == DMA_TO_DEVICE) {
 718                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 719                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 720                         iocb_cmd->ulpPU = 0;
 721                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 722                         phba->fc4OutputRequests++;
 723                 } else {
 724                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 725                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 726                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 727                         fcp_cmnd->fcpCntl3 = READ_DATA;
 728                         phba->fc4InputRequests++;
 729                 }
 730         } else {
 731                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 732                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 733                 iocb_cmd->ulpPU = 0;
 734                 fcp_cmnd->fcpCntl3 = 0;
 735                 phba->fc4ControlRequests++;
 736         }
 737
 738         /*
 739          * Finish initializing those IOCB fields that are independent
 740          * of the scsi_cmnd request_buffer
 741          */
 742         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 743         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 744                 piocbq->iocb.ulpFCP2Rcvy = 1;
 745
 746         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 747         piocbq->context1  = lpfc_cmd;
 748         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 749         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 750         piocbq->vport = vport;
 751 }
 752
 753 static int
 754 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
 755                              struct lpfc_scsi_buf *lpfc_cmd,
 756                              unsigned int lun,
 757                              uint8_t task_mgmt_cmd)
 758 {
 759         struct lpfc_iocbq *piocbq;
 760         IOCB_t *piocb;
 761         struct fcp_cmnd *fcp_cmnd;
 762         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 763         struct lpfc_nodelist *ndlp = rdata->pnode;
 764
 765         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 766                 return 0;
 767         }
 768
 769         piocbq = &(lpfc_cmd->cur_iocbq);
 770         piocbq->vport = vport;
 771
 772         piocb = &piocbq->iocb;
 773
 774         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 775         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 776         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 777
 778         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 779
 780         piocb->ulpContext = ndlp->nlp_rpi;
 781         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 782                 piocb->ulpFCP2Rcvy = 1;
 783         }
 784         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 785
 786         /* ulpTimeout is only one byte */
 787         if (lpfc_cmd->timeout > 0xff) {
 788                 /*
 789                  * Do not timeout the command at the firmware level.
 790                  * The driver will provide the timeout mechanism.
 791                  */
 792                 piocb->ulpTimeout = 0;
 793         } else {
 794                 piocb->ulpTimeout = lpfc_cmd->timeout;
 795         }
 796
 797         return 1;
 798 }
 799
 800 static void
 801 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 802                         struct lpfc_iocbq *cmdiocbq,
 803                         struct lpfc_iocbq *rspiocbq)
 804 {
 805         struct lpfc_scsi_buf *lpfc_cmd =
 806                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
 807         if (lpfc_cmd)
 808                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 809         return;
 810 }
 811
 812 static int
 813 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 814                     unsigned  tgt_id, unsigned int lun,
 815                     struct lpfc_rport_data *rdata)
 816 {
 817         struct lpfc_hba   *phba = vport->phba;
 818         struct lpfc_iocbq *iocbq;
 819         struct lpfc_iocbq *iocbqrsp;
 820         int ret;
 821
 822         if (!rdata->pnode)
 823                 return FAILED;
 824
 825         lpfc_cmd->rdata = rdata;
 826         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 827                                            FCP_TARGET_RESET);
 828         if (!ret)
 829                 return FAILED;
 830
 831         iocbq = &lpfc_cmd->cur_iocbq;
 832         iocbqrsp = lpfc_sli_get_iocbq(phba);
 833
 834         if (!iocbqrsp)
 835                 return FAILED;
 836
 837         /* Issue Target Reset to TGT <num> */
 838         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 839                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
 840                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 841         ret = lpfc_sli_issue_iocb_wait(phba,
 842                                        &phba->sli.ring[phba->sli.fcp_ring],
 843                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 844         if (ret != IOCB_SUCCESS) {
 845                 if (ret == IOCB_TIMEDOUT)
 846                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
 847                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 848         } else {
 849                 ret = SUCCESS;
 850                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 851                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 852                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 853                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 854                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 855         }
 856
 857         lpfc_sli_release_iocbq(phba, iocbqrsp);
 858         return ret;
 859 }
 860
 861 const char *
 862 lpfc_info(struct Scsi_Host *host)
 863 {
 864         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
 865         struct lpfc_hba   *phba = vport->phba;
 866         int len;
 867         static char  lpfcinfobuf[384];
 868
 869         memset(lpfcinfobuf,0,384);
 870         if (phba && phba->pcidev){
 871                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 872                 len = strlen(lpfcinfobuf);
 873                 snprintf(lpfcinfobuf + len,
 874                         384-len,
 875                         " on PCI bus %02x device %02x irq %d",
 876                         phba->pcidev->bus->number,
 877                         phba->pcidev->devfn,
 878                         phba->pcidev->irq);
 879                 len = strlen(lpfcinfobuf);
 880                 if (phba->Port[0]) {
 881                         snprintf(lpfcinfobuf + len,
 882                                  384-len,
 883                                  " port %s",
 884                                  phba->Port);
 885                 }
 886         }
 887         return lpfcinfobuf;
 888 }
 889
 890 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 891 {
 892         unsigned long  poll_tmo_expires =
 893                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 894
 895         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 896                 mod_timer(&phba->fcp_poll_timer,
 897                           poll_tmo_expires);
 898 }
 899
 900 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 901 {
 902         lpfc_poll_rearm_timer(phba);
 903 }
 904
 905 void lpfc_poll_timeout(unsigned long ptr)
 906 {
 907         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
 908
 909         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 910                 lpfc_sli_poll_fcp_ring (phba);
 911                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 912                         lpfc_poll_rearm_timer(phba);
 913         }
 914 }
 915
 916 static int
 917 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 918 {
 919         struct Scsi_Host  *shost = cmnd->device->host;
 920         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 921         struct lpfc_hba   *phba = vport->phba;
 922         struct lpfc_sli   *psli = &phba->sli;
 923         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 924         struct lpfc_nodelist *ndlp = rdata->pnode;
 925         struct lpfc_scsi_buf *lpfc_cmd;
 926         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 927         int err;
 928
 929         err = fc_remote_port_chkready(rport);
 930         if (err) {
 931                 cmnd->result = err;
 932                 goto out_fail_command;
 933         }
 934
 935         /*
 936          * Catch race where our node has transitioned, but the
 937          * transport is still transitioning.
 938          */
 939         if (!ndlp) {
 940                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 941                 goto out_fail_command;
 942         }
 943         lpfc_cmd = lpfc_get_scsi_buf(phba);
 944         if (lpfc_cmd == NULL) {
 945                 lpfc_adjust_queue_depth(phba);
 946
 947                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 948                                  "0707 driver's buffer pool is empty, "
 949                                  "IO busied\n");
 950                 goto out_host_busy;
 951         }
 952
 953         /*
 954          * Store the midlayer's command structure for the completion phase
 955          * and complete the command initialization.
 956          */
 957         lpfc_cmd->pCmd  = cmnd;
 958         lpfc_cmd->rdata = rdata;
 959         lpfc_cmd->timeout = 0;
 960         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 961         cmnd->scsi_done = done;
 962
 963         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 964         if (err)
 965                 goto out_host_busy_free_buf;
 966
 967         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
 968
 969         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 970                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 971         if (err)
 972                 goto out_host_busy_free_buf;
 973
 974         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 975                 lpfc_sli_poll_fcp_ring(phba);
 976                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 977                         lpfc_poll_rearm_timer(phba);
 978         }
 979
 980         return 0;
 981
 982  out_host_busy_free_buf:
 983         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 984         lpfc_release_scsi_buf(phba, lpfc_cmd);
 985  out_host_busy:
 986         return SCSI_MLQUEUE_HOST_BUSY;
 987
 988  out_fail_command:
 989         done(cmnd);
 990         return 0;
 991 }
 992
 993 static void
 994 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
 995 {
 996         struct Scsi_Host *shost = cmnd->device->host;
 997         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 998
 999         spin_lock_irq(shost->host_lock);
1000         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1001                 spin_unlock_irq(shost->host_lock);
1002                 msleep(1000);
1003                 spin_lock_irq(shost->host_lock);
1004         }
1005         spin_unlock_irq(shost->host_lock);
1006         return;
1007 }
1008
1009 static int
1010 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1011 {
1012         struct Scsi_Host  *shost = cmnd->device->host;
1013         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1014         struct lpfc_hba   *phba = vport->phba;
1015         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1016         struct lpfc_iocbq *iocb;
1017         struct lpfc_iocbq *abtsiocb;
1018         struct lpfc_scsi_buf *lpfc_cmd;
1019         IOCB_t *cmd, *icmd;
1020         unsigned int loop_count = 0;
1021         int ret = SUCCESS;
1022
1023         lpfc_block_error_handler(cmnd);
1024         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1025         BUG_ON(!lpfc_cmd);
1026
1027         /*
1028          * If pCmd field of the corresponding lpfc_scsi_buf structure
1029          * points to a different SCSI command, then the driver has
1030          * already completed this command, but the midlayer did not
1031          * see the completion before the eh fired.  Just return
1032          * SUCCESS.
1033          */
1034         iocb = &lpfc_cmd->cur_iocbq;
1035         if (lpfc_cmd->pCmd != cmnd)
1036                 goto out;
1037
1038         BUG_ON(iocb->context1 != lpfc_cmd);
1039
1040         abtsiocb = lpfc_sli_get_iocbq(phba);
1041         if (abtsiocb == NULL) {
1042                 ret = FAILED;
1043                 goto out;
1044         }
1045
1046         /*
1047          * The scsi command can not be in txq and it is in flight because the
1048          * pCmd is still pointig at the SCSI command we have to abort. There
1049          * is no need to search the txcmplq. Just send an abort to the FW.
1050          */
1051
1052         cmd = &iocb->iocb;
1053         icmd = &abtsiocb->iocb;
1054         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1055         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1056         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1057
1058         icmd->ulpLe = 1;
1059         icmd->ulpClass = cmd->ulpClass;
1060         if (lpfc_is_link_up(phba))
1061                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1062         else
1063                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1064
1065         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1066         abtsiocb->vport = vport;
1067         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1068                 lpfc_sli_release_iocbq(phba, abtsiocb);
1069                 ret = FAILED;
1070                 goto out;
1071         }
1072
1073         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1074                 lpfc_sli_poll_fcp_ring (phba);
1075
1076         /* Wait for abort to complete */
1077         while (lpfc_cmd->pCmd == cmnd)
1078         {
1079                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1080                         lpfc_sli_poll_fcp_ring (phba);
1081
1082                 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT * HZ);
1083                 if (++loop_count
1084                     > (2 * vport->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
1085                         break;
1086         }
1087
1088         if (lpfc_cmd->pCmd == cmnd) {
1089                 ret = FAILED;
1090                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1091                                  "0748 abort handler timed out waiting "
1092                                  "for abort to complete: ret %#x, ID %d, "
1093                                  "LUN %d, snum %#lx\n",
1094                                  ret, cmnd->device->id, cmnd->device->lun,
1095                                  cmnd->serial_number);
1096         }
1097
1098  out:
1099         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1100                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1101                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1102                          cmnd->device->lun, cmnd->serial_number);
1103         return ret;
1104 }
1105
1106 static int
1107 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1108 {
1109         struct Scsi_Host  *shost = cmnd->device->host;
1110         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1111         struct lpfc_hba   *phba = vport->phba;
1112         struct lpfc_scsi_buf *lpfc_cmd;
1113         struct lpfc_iocbq *iocbq, *iocbqrsp;
1114         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1115         struct lpfc_nodelist *pnode = rdata->pnode;
1116         uint32_t cmd_result = 0, cmd_status = 0;
1117         int ret = FAILED;
1118         int iocb_status = IOCB_SUCCESS;
1119         int cnt, loopcnt;
1120
1121         lpfc_block_error_handler(cmnd);
1122         loopcnt = 0;
1123         /*
1124          * If target is not in a MAPPED state, delay the reset until
1125          * target is rediscovered or devloss timeout expires.
1126          */
1127         while (1) {
1128                 if (!pnode)
1129                         goto out;
1130
1131                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1132                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1133                         loopcnt++;
1134                         rdata = cmnd->device->hostdata;
1135                         if (!rdata ||
1136                                 (loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
1137                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1138                                                  "0721 LUN Reset rport "
1139                                                  "failure: cnt x%x rdata x%p\n",
1140                                                  loopcnt, rdata);
1141                                 goto out;
1142                         }
1143                         pnode = rdata->pnode;
1144                         if (!pnode)
1145                                 goto out;
1146                 }
1147                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1148                         break;
1149         }
1150
1151         lpfc_cmd = lpfc_get_scsi_buf(phba);
1152         if (lpfc_cmd == NULL)
1153                 goto out;
1154
1155         lpfc_cmd->timeout = 60;
1156         lpfc_cmd->rdata = rdata;
1157
1158         ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
1159                                            FCP_TARGET_RESET);
1160         if (!ret)
1161                 goto out_free_scsi_buf;
1162
1163         iocbq = &lpfc_cmd->cur_iocbq;
1164
1165         /* get a buffer for this IOCB command response */
1166         iocbqrsp = lpfc_sli_get_iocbq(phba);
1167         if (iocbqrsp == NULL)
1168                 goto out_free_scsi_buf;
1169
1170         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1171                          "0703 Issue target reset to TGT %d LUN %d "
1172                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1173                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1174         iocb_status = lpfc_sli_issue_iocb_wait(phba,
1175                                        &phba->sli.ring[phba->sli.fcp_ring],
1176                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1177
1178         if (iocb_status == IOCB_TIMEDOUT)
1179                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1180
1181         if (iocb_status == IOCB_SUCCESS)
1182                 ret = SUCCESS;
1183         else
1184                 ret = iocb_status;
1185
1186         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1187         cmd_status = iocbqrsp->iocb.ulpStatus;
1188
1189         lpfc_sli_release_iocbq(phba, iocbqrsp);
1190
1191         /*
1192          * All outstanding txcmplq I/Os should have been aborted by the device.
1193          * Unfortunately, some targets do not abide by this forcing the driver
1194          * to double check.
1195          */
1196         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1197                                 LPFC_CTX_LUN);
1198         if (cnt)
1199                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1200                                     cmnd->device->id, cmnd->device->lun,
1201                                     LPFC_CTX_LUN);
1202         loopcnt = 0;
1203         while(cnt) {
1204                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1205
1206                 if (++loopcnt
1207                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1208                         break;
1209
1210                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1211                                         cmnd->device->lun, LPFC_CTX_LUN);
1212         }
1213
1214         if (cnt) {
1215                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1216                                  "0719 device reset I/O flush failure: "
1217                                  "cnt x%x\n", cnt);
1218                 ret = FAILED;
1219         }
1220
1221 out_free_scsi_buf:
1222         if (iocb_status != IOCB_TIMEDOUT) {
1223                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1224         }
1225         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1226                          "0713 SCSI layer issued device reset (%d, %d) "
1227                          "return x%x status x%x result x%x\n",
1228                          cmnd->device->id, cmnd->device->lun, ret,
1229                          cmd_status, cmd_result);
1230 out:
1231         return ret;
1232 }
1233
1234 static int
1235 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1236 {
1237         struct Scsi_Host  *shost = cmnd->device->host;
1238         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1239         struct lpfc_hba   *phba = vport->phba;
1240         struct lpfc_nodelist *ndlp = NULL;
1241         int match;
1242         int ret = FAILED, i, err_count = 0;
1243         int cnt, loopcnt;
1244         struct lpfc_scsi_buf * lpfc_cmd;
1245
1246         lpfc_block_error_handler(cmnd);
1247
1248         lpfc_cmd = lpfc_get_scsi_buf(phba);
1249         if (lpfc_cmd == NULL)
1250                 goto out;
1251
1252         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1253         lpfc_cmd->timeout = 60;
1254
1255         /*
1256          * Since the driver manages a single bus device, reset all
1257          * targets known to the driver.  Should any target reset
1258          * fail, this routine returns failure to the midlayer.
1259          */
1260         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1261                 /* Search for mapped node by target ID */
1262                 match = 0;
1263                 spin_lock_irq(shost->host_lock);
1264                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1265                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1266                             i == ndlp->nlp_sid &&
1267                             ndlp->rport) {
1268                                 match = 1;
1269                                 break;
1270                         }
1271                 }
1272                 spin_unlock_irq(shost->host_lock);
1273                 if (!match)
1274                         continue;
1275
1276                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1277                                           cmnd->device->lun,
1278                                           ndlp->rport->dd_data);
1279                 if (ret != SUCCESS) {
1280                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1281                                          "0700 Bus Reset on target %d failed\n",
1282                                          i);
1283                         err_count++;
1284                         break;
1285                 }
1286         }
1287
1288         if (ret != IOCB_TIMEDOUT)
1289                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1290
1291         if (err_count == 0)
1292                 ret = SUCCESS;
1293         else
1294                 ret = FAILED;
1295
1296         /*
1297          * All outstanding txcmplq I/Os should have been aborted by
1298          * the targets.  Unfortunately, some targets do not abide by
1299          * this forcing the driver to double check.
1300          */
1301         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1302         if (cnt)
1303                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1304                                     0, 0, LPFC_CTX_HOST);
1305         loopcnt = 0;
1306         while(cnt) {
1307                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1308
1309                 if (++loopcnt
1310                     > (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1311                         break;
1312
1313                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1314         }
1315
1316         if (cnt) {
1317                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1318                                  "0715 Bus Reset I/O flush failure: "
1319                                  "cnt x%x left x%x\n", cnt, i);
1320                 ret = FAILED;
1321         }
1322
1323         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1324                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1325 out:
1326         return ret;
1327 }
1328
1329 static int
1330 lpfc_slave_alloc(struct scsi_device *sdev)
1331 {
1332         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1333         struct lpfc_hba   *phba = vport->phba;
1334         struct lpfc_scsi_buf *scsi_buf = NULL;
1335         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1336         uint32_t total = 0, i;
1337         uint32_t num_to_alloc = 0;
1338         unsigned long flags;
1339
1340         if (!rport || fc_remote_port_chkready(rport))
1341                 return -ENXIO;
1342
1343         sdev->hostdata = rport->dd_data;
1344
1345         /*
1346          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1347          * available list of scsi buffers.  Don't allocate more than the
1348          * HBA limit conveyed to the midlayer via the host structure.  The
1349          * formula accounts for the lun_queue_depth + error handlers + 1
1350          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1351          */
1352         total = phba->total_scsi_bufs;
1353         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1354
1355         /* Allow some exchanges to be available always to complete discovery */
1356         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1357                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1358                                  "0704 At limitation of %d preallocated "
1359                                  "command buffers\n", total);
1360                 return 0;
1361         /* Allow some exchanges to be available always to complete discovery */
1362         } else if (total + num_to_alloc >
1363                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1364                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1365                                  "0705 Allocation request of %d "
1366                                  "command buffers will exceed max of %d.  "
1367                                  "Reducing allocation request to %d.\n",
1368                                  num_to_alloc, phba->cfg_hba_queue_depth,
1369                                  (phba->cfg_hba_queue_depth - total));
1370                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1371         }
1372
1373         for (i = 0; i < num_to_alloc; i++) {
1374                 scsi_buf = lpfc_new_scsi_buf(vport);
1375                 if (!scsi_buf) {
1376                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1377                                          "0706 Failed to allocate "
1378                                          "command buffer\n");
1379                         break;
1380                 }
1381
1382                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1383                 phba->total_scsi_bufs++;
1384                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1385                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1386         }
1387         return 0;
1388 }
1389
1390 static int
1391 lpfc_slave_configure(struct scsi_device *sdev)
1392 {
1393         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1394         struct lpfc_hba   *phba = vport->phba;
1395         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1396
1397         if (sdev->tagged_supported)
1398                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1399         else
1400                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1401
1402         /*
1403          * Initialize the fc transport attributes for the target
1404          * containing this scsi device.  Also note that the driver's
1405          * target pointer is stored in the starget_data for the
1406          * driver's sysfs entry point functions.
1407          */
1408         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1409
1410         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1411                 lpfc_sli_poll_fcp_ring(phba);
1412                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1413                         lpfc_poll_rearm_timer(phba);
1414         }
1415
1416         return 0;
1417 }
1418
1419 static void
1420 lpfc_slave_destroy(struct scsi_device *sdev)
1421 {
1422         sdev->hostdata = NULL;
1423         return;
1424 }
1425
1426
1427 struct scsi_host_template lpfc_template = {
1428         .module                 = THIS_MODULE,
1429         .name                   = LPFC_DRIVER_NAME,
1430         .info                   = lpfc_info,
1431         .queuecommand           = lpfc_queuecommand,
1432         .eh_abort_handler       = lpfc_abort_handler,
1433         .eh_device_reset_handler= lpfc_device_reset_handler,
1434         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1435         .slave_alloc            = lpfc_slave_alloc,
1436         .slave_configure        = lpfc_slave_configure,
1437         .slave_destroy          = lpfc_slave_destroy,
1438         .scan_finished          = lpfc_scan_finished,
1439         .this_id                = -1,
1440         .sg_tablesize           = LPFC_SG_SEG_CNT,
1441         .use_sg_chaining        = ENABLE_SG_CHAINING,
1442         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1443         .use_clustering         = ENABLE_CLUSTERING,
1444         .shost_attrs            = lpfc_hba_attrs,
1445         .max_sectors            = 0xFFFF,
1446 };
1447
1448 struct scsi_host_template lpfc_vport_template = {
1449         .module                 = THIS_MODULE,
1450         .name                   = LPFC_DRIVER_NAME,
1451         .info                   = lpfc_info,
1452         .queuecommand           = lpfc_queuecommand,
1453         .eh_abort_handler       = lpfc_abort_handler,
1454         .eh_device_reset_handler= lpfc_device_reset_handler,
1455         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1456         .slave_alloc            = lpfc_slave_alloc,
1457         .slave_configure        = lpfc_slave_configure,
1458         .slave_destroy          = lpfc_slave_destroy,
1459         .scan_finished          = lpfc_scan_finished,
1460         .this_id                = -1,
1461         .sg_tablesize           = LPFC_SG_SEG_CNT,
1462         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1463         .use_clustering         = ENABLE_CLUSTERING,
1464         .use_sg_chaining        = ENABLE_SG_CHAINING,
1465         .shost_attrs            = lpfc_vport_attrs,
1466         .max_sectors            = 0xFFFF,
1467 };