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