drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Enterprise Fibre Channel Host Bus Adapters.                     *
   4  * Refer to the README file included with this package for         *
   5  * driver version and adapter support.                             *
   6  * Copyright (C) 2004 Emulex Corporation.                          *
   7  * www.emulex.com                                                  *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of the GNU General Public License     *
  11  * as published by the Free Software Foundation; either version 2  *
  12  * of the License, or (at your option) any later version.          *
  13  *                                                                 *
  14  * This program is distributed in the hope that it will be useful, *
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
  17  * GNU General Public License for more details, a copy of which    *
  18  * can be found in the file COPYING included with this package.    *
  19  *******************************************************************/
  20
  21 /*
  22  * $Id: lpfc_scsi.c 1.37 2005/04/13 14:27:09EDT sf_support Exp  $
  23  */
  24
  25 #include <linux/pci.h>
  26 #include <linux/interrupt.h>
  27
  28 #include <scsi/scsi.h>
  29 #include <scsi/scsi_device.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_tcq.h>
  32 #include <scsi/scsi_transport_fc.h>
  33
  34 #include "lpfc_version.h"
  35 #include "lpfc_hw.h"
  36 #include "lpfc_sli.h"
  37 #include "lpfc_disc.h"
  38 #include "lpfc_scsi.h"
  39 #include "lpfc.h"
  40 #include "lpfc_logmsg.h"
  41 #include "lpfc_crtn.h"
  42
  43 #define LPFC_RESET_WAIT  2
  44 #define LPFC_ABORT_WAIT  2
  45
  46 static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
  47 {
  48         fcmd->fcpLunLsl = 0;
  49         fcmd->fcpLunMsl = swab16((uint16_t)lun);
  50 }
  51
  52 /*
  53  * This routine allocates a scsi buffer, which contains all the necessary
  54  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  55  * contains information to build the IOCB.  The DMAable region contains
  56  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  57  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  58  * and the BPL BDE is setup in the IOCB.
  59  */
  60 static struct lpfc_scsi_buf *
  61 lpfc_get_scsi_buf(struct lpfc_hba * phba)
  62 {
  63         struct lpfc_scsi_buf *psb;
  64         struct ulp_bde64 *bpl;
  65         IOCB_t *iocb;
  66         dma_addr_t pdma_phys;
  67
  68         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  69         if (!psb)
  70                 return NULL;
  71         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  72         psb->scsi_hba = phba;
  73
  74         /*
  75          * Get memory from the pci pool to map the virt space to pci bus space
  76          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  77          * struct fcp_rsp and the number of bde's necessary to support the
  78          * sg_tablesize.
  79          */
  80         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  81                                                         &psb->dma_handle);
  82         if (!psb->data) {
  83                 kfree(psb);
  84                 return NULL;
  85         }
  86
  87         /* Initialize virtual ptrs to dma_buf region. */
  88         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  89
  90         psb->fcp_cmnd = psb->data;
  91         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  92         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  93                                                         sizeof(struct fcp_rsp);
  94
  95         /* Initialize local short-hand pointers. */
  96         bpl = psb->fcp_bpl;
  97         pdma_phys = psb->dma_handle;
  98
  99         /*
 100          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 101          * list bdes.  Initialize the first two and leave the rest for
 102          * queuecommand.
 103          */
 104         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 105         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 106         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 107         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 108         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 109         bpl++;
 110
 111         /* Setup the physical region for the FCP RSP */
 112         pdma_phys += sizeof (struct fcp_cmnd);
 113         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 114         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 115         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 116         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 117         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 118
 119         /*
 120          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 121          * initialize it with all known data now.
 122          */
 123         pdma_phys += (sizeof (struct fcp_rsp));
 124         iocb = &psb->cur_iocbq.iocb;
 125         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 126         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 127         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 128         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 129         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 130         iocb->ulpBdeCount = 1;
 131         iocb->ulpClass = CLASS3;
 132
 133         return psb;
 134 }
 135
 136 static void
 137 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
 138 {
 139         struct lpfc_hba *phba = psb->scsi_hba;
 140
 141         /*
 142          * There are only two special cases to consider.  (1) the scsi command
 143          * requested scatter-gather usage or (2) the scsi command allocated
 144          * a request buffer, but did not request use_sg.  There is a third
 145          * case, but it does not require resource deallocation.
 146          */
 147         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 148                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 149                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 150         } else {
 151                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 152                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 153                                                 psb->pCmd->request_bufflen,
 154                                                 psb->pCmd->sc_data_direction);
 155                  }
 156         }
 157
 158         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 159 }
 160
 161 static int
 162 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 163 {
 164         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 165         struct scatterlist *sgel = NULL;
 166         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 167         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 168         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 169         dma_addr_t physaddr;
 170         uint32_t i, num_bde = 0;
 171         int datadir = scsi_cmnd->sc_data_direction;
 172         int dma_error;
 173
 174         /*
 175          * There are three possibilities here - use scatter-gather segment, use
 176          * the single mapping, or neither.  Start the lpfc command prep by
 177          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 178          * data bde entry.
 179          */
 180         bpl += 2;
 181         if (scsi_cmnd->use_sg) {
 182                 /*
 183                  * The driver stores the segment count returned from pci_map_sg
 184                  * because this a count of dma-mappings used to map the use_sg
 185                  * pages.  They are not guaranteed to be the same for those
 186                  * architectures that implement an IOMMU.
 187                  */
 188                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 189                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 190                                                 scsi_cmnd->use_sg, datadir);
 191                 if (lpfc_cmd->seg_cnt == 0)
 192                         return 1;
 193
 194                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 195                         printk(KERN_ERR "%s: Too many sg segments from "
 196                                "dma_map_sg.  Config %d, seg_cnt %d",
 197                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 198                                lpfc_cmd->seg_cnt);
 199                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 200                                      lpfc_cmd->seg_cnt, datadir);
 201                         return 1;
 202                 }
 203
 204                 /*
 205                  * The driver established a maximum scatter-gather segment count
 206                  * during probe that limits the number of sg elements in any
 207                  * single scsi command.  Just run through the seg_cnt and format
 208                  * the bde's.
 209                  */
 210                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 211                         physaddr = sg_dma_address(sgel);
 212                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 213                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 214                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 215                         if (datadir == DMA_TO_DEVICE)
 216                                 bpl->tus.f.bdeFlags = 0;
 217                         else
 218                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 219                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 220                         bpl++;
 221                         sgel++;
 222                         num_bde++;
 223                 }
 224         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 225                 physaddr = dma_map_single(&phba->pcidev->dev,
 226                                           scsi_cmnd->request_buffer,
 227                                           scsi_cmnd->request_bufflen,
 228                                           datadir);
 229                 dma_error = dma_mapping_error(physaddr);
 230                 if (dma_error) {
 231                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 232                                 "%d:0718 Unable to dma_map_single "
 233                                 "request_buffer: x%x\n",
 234                                 phba->brd_no, dma_error);
 235                         return 1;
 236                 }
 237
 238                 lpfc_cmd->nonsg_phys = physaddr;
 239                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 240                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 241                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 242                 if (datadir == DMA_TO_DEVICE)
 243                         bpl->tus.f.bdeFlags = 0;
 244                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 245                 num_bde = 1;
 246                 bpl++;
 247         }
 248
 249         /*
 250          * Finish initializing those IOCB fields that are dependent on the
 251          * scsi_cmnd request_buffer
 252          */
 253         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 254                 (num_bde * sizeof (struct ulp_bde64));
 255         iocb_cmd->ulpBdeCount = 1;
 256         iocb_cmd->ulpLe = 1;
 257         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 258         return 0;
 259 }
 260
 261 static void
 262 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 263 {
 264         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 265         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 266         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 267         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 268         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 269         uint32_t resp_info = fcprsp->rspStatus2;
 270         uint32_t scsi_status = fcprsp->rspStatus3;
 271         uint32_t host_status = DID_OK;
 272         uint32_t rsplen = 0;
 273
 274         /*
 275          *  If this is a task management command, there is no
 276          *  scsi packet associated with this lpfc_cmd.  The driver
 277          *  consumes it.
 278          */
 279         if (fcpcmd->fcpCntl2) {
 280                 scsi_status = 0;
 281                 goto out;
 282         }
 283
 284         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 285                         "%d:0730 FCP command failed: RSP "
 286                         "Data: x%x x%x x%x x%x x%x x%x\n",
 287                         phba->brd_no, resp_info, scsi_status,
 288                         be32_to_cpu(fcprsp->rspResId),
 289                         be32_to_cpu(fcprsp->rspSnsLen),
 290                         be32_to_cpu(fcprsp->rspRspLen),
 291                         fcprsp->rspInfo3);
 292
 293         if (resp_info & RSP_LEN_VALID) {
 294                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 295                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 296                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 297                         host_status = DID_ERROR;
 298                         goto out;
 299                 }
 300         }
 301
 302         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 303                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 304                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 305                         snslen = SCSI_SENSE_BUFFERSIZE;
 306
 307                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 308         }
 309
 310         cmnd->resid = 0;
 311         if (resp_info & RESID_UNDER) {
 312                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 313
 314                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 315                                 "%d:0716 FCP Read Underrun, expected %d, "
 316                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 317                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 318                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 319
 320                 /*
 321                  * The cmnd->underflow is the minimum number of bytes that must
 322                  * be transfered for this command.  Provided a sense condition
 323                  * is not present, make sure the actual amount transferred is at
 324                  * least the underflow value or fail.
 325                  */
 326                 if (!(resp_info & SNS_LEN_VALID) &&
 327                     (scsi_status == SAM_STAT_GOOD) &&
 328                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 329                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 330                                         "%d:0717 FCP command x%x residual "
 331                                         "underrun converted to error "
 332                                         "Data: x%x x%x x%x\n", phba->brd_no,
 333                                         cmnd->cmnd[0], cmnd->request_bufflen,
 334                                         cmnd->resid, cmnd->underflow);
 335
 336                         host_status = DID_ERROR;
 337                 }
 338         } else if (resp_info & RESID_OVER) {
 339                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 340                                 "%d:0720 FCP command x%x residual "
 341                                 "overrun error. Data: x%x x%x \n",
 342                                 phba->brd_no, cmnd->cmnd[0],
 343                                 cmnd->request_bufflen, cmnd->resid);
 344                 host_status = DID_ERROR;
 345
 346         /*
 347          * Check SLI validation that all the transfer was actually done
 348          * (fcpi_parm should be zero). Apply check only to reads.
 349          */
 350         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 351                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 352                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 353                         "%d:0734 FCP Read Check Error Data: "
 354                         "x%x x%x x%x x%x\n", phba->brd_no,
 355                         be32_to_cpu(fcpcmd->fcpDl),
 356                         be32_to_cpu(fcprsp->rspResId),
 357                         fcpi_parm, cmnd->cmnd[0]);
 358                 host_status = DID_ERROR;
 359                 cmnd->resid = cmnd->request_bufflen;
 360         }
 361
 362  out:
 363         cmnd->result = ScsiResult(host_status, scsi_status);
 364 }
 365
 366 static void
 367 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 368                         struct lpfc_iocbq *pIocbOut)
 369 {
 370         struct lpfc_scsi_buf *lpfc_cmd =
 371                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 372         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 373         struct lpfc_nodelist *pnode = rdata->pnode;
 374         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 375         unsigned long iflag;
 376
 377         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 378         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 379
 380         if (lpfc_cmd->status) {
 381                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 382                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 383                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 384                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 385                         lpfc_cmd->status = IOSTAT_DEFAULT;
 386
 387                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 388                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 389                                 "x%x result: x%x Data: x%x x%x\n",
 390                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 391                                 cmd->device->lun, lpfc_cmd->status,
 392                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 393                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 394
 395                 switch (lpfc_cmd->status) {
 396                 case IOSTAT_FCP_RSP_ERROR:
 397                         /* Call FCP RSP handler to determine result */
 398                         lpfc_handle_fcp_err(lpfc_cmd);
 399                         break;
 400                 case IOSTAT_NPORT_BSY:
 401                 case IOSTAT_FABRIC_BSY:
 402                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 403                         break;
 404                 default:
 405                         cmd->result = ScsiResult(DID_ERROR, 0);
 406                         break;
 407                 }
 408
 409                 if (pnode) {
 410                         if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
 411                                 cmd->result = ScsiResult(DID_BUS_BUSY,
 412                                         SAM_STAT_BUSY);
 413                 }
 414                 else {
 415                         cmd->result = ScsiResult(DID_NO_CONNECT, 0);
 416                 }
 417         } else {
 418                 cmd->result = ScsiResult(DID_OK, 0);
 419         }
 420
 421         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 422                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 423
 424                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 425                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 426                                 "SNS x%x x%x Data: x%x x%x\n",
 427                                 phba->brd_no, cmd->device->id,
 428                                 cmd->device->lun, cmd, cmd->result,
 429                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 430         }
 431
 432         spin_lock_irqsave(phba->host->host_lock, iflag);
 433         lpfc_free_scsi_buf(lpfc_cmd);
 434         cmd->host_scribble = NULL;
 435         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 436
 437         cmd->scsi_done(cmd);
 438 }
 439
 440 static void
 441 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 442                         struct lpfc_nodelist *pnode)
 443 {
 444         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 445         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 446         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 447         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 448         int datadir = scsi_cmnd->sc_data_direction;
 449
 450         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 451
 452         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 453
 454         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 455
 456         if (scsi_cmnd->device->tagged_supported) {
 457                 switch (scsi_cmnd->tag) {
 458                 case HEAD_OF_QUEUE_TAG:
 459                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 460                         break;
 461                 case ORDERED_QUEUE_TAG:
 462                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 463                         break;
 464                 default:
 465                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 466                         break;
 467                 }
 468         } else
 469                 fcp_cmnd->fcpCntl1 = 0;
 470
 471         /*
 472          * There are three possibilities here - use scatter-gather segment, use
 473          * the single mapping, or neither.  Start the lpfc command prep by
 474          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 475          * data bde entry.
 476          */
 477         if (scsi_cmnd->use_sg) {
 478                 if (datadir == DMA_TO_DEVICE) {
 479                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 480                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 481                         iocb_cmd->ulpPU = 0;
 482                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 483                         phba->fc4OutputRequests++;
 484                 } else {
 485                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 486                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 487                         iocb_cmd->un.fcpi.fcpi_parm =
 488                                 scsi_cmnd->request_bufflen;
 489                         fcp_cmnd->fcpCntl3 = READ_DATA;
 490                         phba->fc4InputRequests++;
 491                 }
 492         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 493                 if (datadir == DMA_TO_DEVICE) {
 494                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 495                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 496                         iocb_cmd->ulpPU = 0;
 497                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 498                         phba->fc4OutputRequests++;
 499                 } else {
 500                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 501                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 502                         iocb_cmd->un.fcpi.fcpi_parm =
 503                                 scsi_cmnd->request_bufflen;
 504                         fcp_cmnd->fcpCntl3 = READ_DATA;
 505                         phba->fc4InputRequests++;
 506                 }
 507         } else {
 508                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 509                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 510                 iocb_cmd->ulpPU = 0;
 511                 fcp_cmnd->fcpCntl3 = 0;
 512                 phba->fc4ControlRequests++;
 513         }
 514
 515         /*
 516          * Finish initializing those IOCB fields that are independent
 517          * of the scsi_cmnd request_buffer
 518          */
 519         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 520         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 521                 piocbq->iocb.ulpFCP2Rcvy = 1;
 522
 523         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 524         piocbq->context1  = lpfc_cmd;
 525         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 526         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 527 }
 528
 529 static int
 530 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 531                              struct lpfc_scsi_buf *lpfc_cmd,
 532                              uint8_t task_mgmt_cmd)
 533 {
 534         struct lpfc_sli *psli;
 535         struct lpfc_iocbq *piocbq;
 536         IOCB_t *piocb;
 537         struct fcp_cmnd *fcp_cmnd;
 538         struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
 539         struct lpfc_rport_data *rdata = scsi_dev->hostdata;
 540         struct lpfc_nodelist *ndlp = rdata->pnode;
 541
 542         if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 543                 return 0;
 544         }
 545
 546         psli = &phba->sli;
 547         piocbq = &(lpfc_cmd->cur_iocbq);
 548         piocb = &piocbq->iocb;
 549
 550         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 551         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 552         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 553
 554         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 555
 556         piocb->ulpContext = ndlp->nlp_rpi;
 557         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 558                 piocb->ulpFCP2Rcvy = 1;
 559         }
 560         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 561
 562         /* ulpTimeout is only one byte */
 563         if (lpfc_cmd->timeout > 0xff) {
 564                 /*
 565                  * Do not timeout the command at the firmware level.
 566                  * The driver will provide the timeout mechanism.
 567                  */
 568                 piocb->ulpTimeout = 0;
 569         } else {
 570                 piocb->ulpTimeout = lpfc_cmd->timeout;
 571         }
 572
 573         lpfc_cmd->rdata = rdata;
 574
 575         switch (task_mgmt_cmd) {
 576         case FCP_LUN_RESET:
 577                 /* Issue LUN Reset to TGT <num> LUN <num> */
 578                 lpfc_printf_log(phba,
 579                                 KERN_INFO,
 580                                 LOG_FCP,
 581                                 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
 582                                 "Data: x%x x%x\n",
 583                                 phba->brd_no,
 584                                 scsi_dev->id, scsi_dev->lun,
 585                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 586
 587                 break;
 588         case FCP_ABORT_TASK_SET:
 589                 /* Issue Abort Task Set to TGT <num> LUN <num> */
 590                 lpfc_printf_log(phba,
 591                                 KERN_INFO,
 592                                 LOG_FCP,
 593                                 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
 594                                 "Data: x%x x%x\n",
 595                                 phba->brd_no,
 596                                 scsi_dev->id, scsi_dev->lun,
 597                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 598
 599                 break;
 600         case FCP_TARGET_RESET:
 601                 /* Issue Target Reset to TGT <num> */
 602                 lpfc_printf_log(phba,
 603                                 KERN_INFO,
 604                                 LOG_FCP,
 605                                 "%d:0702 Issue Target Reset to TGT %d "
 606                                 "Data: x%x x%x\n",
 607                                 phba->brd_no,
 608                                 scsi_dev->id, ndlp->nlp_rpi,
 609                                 ndlp->nlp_flag);
 610                 break;
 611         }
 612
 613         return (1);
 614 }
 615
 616 static int
 617 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
 618 {
 619         struct lpfc_iocbq *iocbq;
 620         struct lpfc_iocbq *iocbqrsp = NULL;
 621         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 622         int ret;
 623
 624         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
 625         if (!ret)
 626                 return FAILED;
 627
 628         lpfc_cmd->scsi_hba = phba;
 629         iocbq = &lpfc_cmd->cur_iocbq;
 630         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 631         if (!iocbqrsp)
 632                 return FAILED;
 633         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 634
 635         iocbq->iocb_flag |= LPFC_IO_POLL;
 636         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 637                      &phba->sli.ring[phba->sli.fcp_ring],
 638                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 639                      iocbqrsp,
 640                      lpfc_cmd->timeout);
 641         if (ret != IOCB_SUCCESS) {
 642                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 643                 ret = FAILED;
 644         } else {
 645                 ret = SUCCESS;
 646                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 647                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 648                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 649                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 650                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 651         }
 652
 653         /*
 654          * All outstanding txcmplq I/Os should have been aborted by the target.
 655          * Unfortunately, some targets do not abide by this forcing the driver
 656          * to double check.
 657          */
 658         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 659                             lpfc_cmd->pCmd->device->id,
 660                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 661
 662         /* Return response IOCB to free list. */
 663         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
 664         return ret;
 665 }
 666
 667 static void
 668 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 669                             struct lpfc_iocbq *pIocbOut)
 670 {
 671         unsigned long iflag;
 672         struct lpfc_scsi_buf *lpfc_cmd =
 673                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 674
 675         spin_lock_irqsave(phba->host->host_lock, iflag);
 676         lpfc_free_scsi_buf(lpfc_cmd);
 677         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 678 }
 679
 680 static void
 681 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 682                                 struct lpfc_iocbq *pIocbIn,
 683                                 struct lpfc_iocbq *pIocbOut)
 684 {
 685         struct scsi_cmnd *ml_cmd =
 686                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 687
 688         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 689         ml_cmd->host_scribble = NULL;
 690 }
 691
 692 const char *
 693 lpfc_info(struct Scsi_Host *host)
 694 {
 695         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 696         int len;
 697         static char  lpfcinfobuf[384];
 698
 699         memset(lpfcinfobuf,0,384);
 700         if (phba && phba->pcidev){
 701                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 702                 len = strlen(lpfcinfobuf);
 703                 snprintf(lpfcinfobuf + len,
 704                         384-len,
 705                         " on PCI bus %02x device %02x irq %d",
 706                         phba->pcidev->bus->number,
 707                         phba->pcidev->devfn,
 708                         phba->pcidev->irq);
 709                 len = strlen(lpfcinfobuf);
 710                 if (phba->Port[0]) {
 711                         snprintf(lpfcinfobuf + len,
 712                                  384-len,
 713                                  " port %s",
 714                                  phba->Port);
 715                 }
 716         }
 717         return lpfcinfobuf;
 718 }
 719
 720 static int
 721 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 722 {
 723         struct lpfc_hba *phba =
 724                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 725         struct lpfc_sli *psli = &phba->sli;
 726         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 727         struct lpfc_nodelist *ndlp = rdata->pnode;
 728         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 729         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 730         int err = 0;
 731
 732         /*
 733          * The target pointer is guaranteed not to be NULL because the driver
 734          * only clears the device->hostdata field in lpfc_slave_destroy.  This
 735          * approach guarantees no further IO calls on this target.
 736          */
 737         if (!ndlp) {
 738                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 739                 goto out_fail_command;
 740         }
 741
 742         /*
 743          * A Fibre Channel target is present and functioning only when the node
 744          * state is MAPPED.  Any other state is a failure.
 745          */
 746         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
 747                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
 748                     (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
 749                         cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 750                         goto out_fail_command;
 751                 }
 752                 /*
 753                  * The device is most likely recovered and the driver
 754                  * needs a bit more time to finish.  Ask the midlayer
 755                  * to retry.
 756                  */
 757                 goto out_host_busy;
 758         }
 759
 760         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 761         if (lpfc_cmd == NULL) {
 762                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 763                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 764                 goto out_host_busy;
 765         }
 766
 767         /*
 768          * Store the midlayer's command structure for the completion phase
 769          * and complete the command initialization.
 770          */
 771         lpfc_cmd->pCmd  = cmnd;
 772         lpfc_cmd->rdata = rdata;
 773         lpfc_cmd->timeout = 0;
 774         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 775         cmnd->scsi_done = done;
 776
 777         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 778         if (err)
 779                 goto out_host_busy_free_buf;
 780
 781         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 782
 783         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 784                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 785         if (err)
 786                 goto out_host_busy_free_buf;
 787         return 0;
 788
 789  out_host_busy_free_buf:
 790         lpfc_free_scsi_buf(lpfc_cmd);
 791         cmnd->host_scribble = NULL;
 792  out_host_busy:
 793         return SCSI_MLQUEUE_HOST_BUSY;
 794
 795  out_fail_command:
 796         done(cmnd);
 797         return 0;
 798 }
 799
 800 static int
 801 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 802 {
 803         struct lpfc_hba *phba =
 804                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 805         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 806         struct lpfc_iocbq *iocb, *next_iocb;
 807         struct lpfc_iocbq *abtsiocb = NULL;
 808         struct lpfc_scsi_buf *lpfc_cmd;
 809         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 810         IOCB_t *cmd, *icmd;
 811         unsigned long snum;
 812         unsigned int id, lun;
 813         unsigned int loop_count = 0;
 814         int ret = IOCB_SUCCESS;
 815
 816         /*
 817          * If the host_scribble data area is NULL, then the driver has already
 818          * completed this command, but the midlayer did not see the completion
 819          * before the eh fired.  Just return SUCCESS.
 820          */
 821         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 822         if (!lpfc_cmd)
 823                 return SUCCESS;
 824
 825         /* save these now since lpfc_cmd can be freed */
 826         id   = lpfc_cmd->pCmd->device->id;
 827         lun  = lpfc_cmd->pCmd->device->lun;
 828         snum = lpfc_cmd->pCmd->serial_number;
 829
 830         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 831                 cmd = &iocb->iocb;
 832                 if (iocb->context1 != lpfc_cmd)
 833                         continue;
 834
 835                 list_del_init(&iocb->list);
 836                 pring->txq_cnt--;
 837                 if (!iocb->iocb_cmpl) {
 838                         list_add_tail(&iocb->list, lpfc_iocb_list);
 839                 }
 840                 else {
 841                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 842                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 843                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 844                 }
 845
 846                 goto out;
 847         }
 848
 849         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 850         if (abtsiocb == NULL)
 851                 return FAILED;
 852
 853         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 854
 855         /*
 856          * The scsi command was not in the txq.  Check the txcmplq and if it is
 857          * found, send an abort to the FW.
 858          */
 859         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 860                 if (iocb->context1 != lpfc_cmd)
 861                         continue;
 862
 863                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 864                 cmd = &iocb->iocb;
 865                 icmd = &abtsiocb->iocb;
 866                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 867                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 868                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 869
 870                 icmd->ulpLe = 1;
 871                 icmd->ulpClass = cmd->ulpClass;
 872                 if (phba->hba_state >= LPFC_LINK_UP)
 873                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 874                 else
 875                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 876
 877                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 878                                                                 IOCB_ERROR) {
 879                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 880                         ret = IOCB_ERROR;
 881                         break;
 882                 }
 883
 884                 /* Wait for abort to complete */
 885                 while (cmnd->host_scribble)
 886                 {
 887                         spin_unlock_irq(phba->host->host_lock);
 888                         set_current_state(TASK_UNINTERRUPTIBLE);
 889                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 890                         spin_lock_irq(phba->host->host_lock);
 891                         if (++loop_count
 892                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 893                                 break;
 894                 }
 895
 896                 if(cmnd->host_scribble) {
 897                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 898                                         "%d:0748 abort handler timed "
 899                                         "out waiting for abort to "
 900                                         "complete. Data: "
 901                                         "x%x x%x x%x x%lx\n",
 902                                         phba->brd_no, ret, id, lun, snum);
 903                         cmnd->host_scribble = NULL;
 904                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 905                         ret = IOCB_ERROR;
 906                 }
 907
 908                 break;
 909         }
 910
 911  out:
 912         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 913                         "%d:0749 SCSI layer issued abort device "
 914                         "Data: x%x x%x x%x x%lx\n",
 915                         phba->brd_no, ret, id, lun, snum);
 916
 917         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 918 }
 919
 920 static int
 921 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 922 {
 923         int rc;
 924         spin_lock_irq(cmnd->device->host->host_lock);
 925         rc = __lpfc_abort_handler(cmnd);
 926         spin_unlock_irq(cmnd->device->host->host_lock);
 927         return rc;
 928 }
 929
 930 static int
 931 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 932 {
 933         struct Scsi_Host *shost = cmnd->device->host;
 934         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 935         struct lpfc_sli *psli = &phba->sli;
 936         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 937         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 938         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 939         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 940         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 941         struct lpfc_nodelist *pnode = rdata->pnode;
 942         int ret = FAILED;
 943         int cnt, loopcnt;
 944
 945         /*
 946          * If target is not in a MAPPED state, delay the reset until
 947          * target is rediscovered or nodev timeout expires.
 948          */
 949         while ( 1 ) {
 950                 if (!pnode)
 951                         break;
 952
 953                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 954                         spin_unlock_irq(phba->host->host_lock);
 955                         set_current_state(TASK_UNINTERRUPTIBLE);
 956                         schedule_timeout( HZ/2);
 957                         spin_lock_irq(phba->host->host_lock);
 958                 }
 959                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 960                         break;
 961         }
 962
 963         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 964         if (lpfc_cmd == NULL)
 965                 goto out;
 966
 967         lpfc_cmd->pCmd = cmnd;
 968         lpfc_cmd->timeout = 60;
 969         lpfc_cmd->scsi_hba = phba;
 970
 971         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 972         if (!ret)
 973                 goto out_free_scsi_buf;
 974
 975         iocbq = &lpfc_cmd->cur_iocbq;
 976
 977         /* get a buffer for this IOCB command response */
 978         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 979         if (iocbqrsp == NULL)
 980                 goto out_free_scsi_buf;
 981
 982         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 983
 984         iocbq->iocb_flag |= LPFC_IO_POLL;
 985         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 986
 987         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 988                      &phba->sli.ring[psli->fcp_ring],
 989                      iocbq, 0, iocbqrsp, 60);
 990         if (ret == IOCB_SUCCESS)
 991                 ret = SUCCESS;
 992
 993         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 994         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 995         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
 996                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
 997                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 998
 999         /*
1000          * All outstanding txcmplq I/Os should have been aborted by the target.
1001          * Unfortunately, some targets do not abide by this forcing the driver
1002          * to double check.
1003          */
1004         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1005                             cmnd->device->id, cmnd->device->lun, 0,
1006                             LPFC_CTX_LUN);
1007
1008         loopcnt = 0;
1009         while((cnt = lpfc_sli_sum_iocb(phba,
1010                                        &phba->sli.ring[phba->sli.fcp_ring],
1011                                        cmnd->device->id, cmnd->device->lun,
1012                                        LPFC_CTX_LUN))) {
1013                 spin_unlock_irq(phba->host->host_lock);
1014                 set_current_state(TASK_UNINTERRUPTIBLE);
1015                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1016                 spin_lock_irq(phba->host->host_lock);
1017
1018                 if (++loopcnt
1019                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1020                         break;
1021         }
1022
1023         if (cnt) {
1024                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1025                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1026                         phba->brd_no, cnt);
1027         }
1028
1029         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1030
1031 out_free_scsi_buf:
1032         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1033                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1034                         "Data: x%x x%x x%x\n",
1035                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1036                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1037                         lpfc_cmd->result);
1038         lpfc_free_scsi_buf(lpfc_cmd);
1039 out:
1040         return ret;
1041 }
1042
1043 static int
1044 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1045 {
1046         int rc;
1047         spin_lock_irq(cmnd->device->host->host_lock);
1048         rc = __lpfc_reset_lun_handler(cmnd);
1049         spin_unlock_irq(cmnd->device->host->host_lock);
1050         return rc;
1051 }
1052
1053 /*
1054  * Note: midlayer calls this function with the host_lock held
1055  */
1056 static int
1057 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1058 {
1059         struct Scsi_Host *shost = cmnd->device->host;
1060         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1061         struct lpfc_nodelist *ndlp = NULL;
1062         int match;
1063         int ret = FAILED, i, err_count = 0;
1064         int cnt, loopcnt;
1065         unsigned int midlayer_id = 0;
1066         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1067         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1068
1069         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1070         if (lpfc_cmd == NULL)
1071                 goto out;
1072
1073         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1074         lpfc_cmd->timeout = 60;
1075         lpfc_cmd->pCmd = cmnd;
1076         lpfc_cmd->scsi_hba = phba;
1077
1078         /*
1079          * Since the driver manages a single bus device, reset all
1080          * targets known to the driver.  Should any target reset
1081          * fail, this routine returns failure to the midlayer.
1082          */
1083         midlayer_id = cmnd->device->id;
1084         for (i = 0; i < MAX_FCP_TARGET; i++) {
1085                 /* Search the mapped list for this target ID */
1086                 match = 0;
1087                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1088                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1089                                 match = 1;
1090                                 break;
1091                         }
1092                 }
1093                 if (!match)
1094                         continue;
1095
1096                 lpfc_cmd->pCmd->device->id = i;
1097                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1098                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1099                 if (ret != SUCCESS) {
1100                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1101                                 "%d:0713 Bus Reset on target %d failed\n",
1102                                 phba->brd_no, i);
1103                         err_count++;
1104                 }
1105         }
1106
1107         cmnd->device->id = midlayer_id;
1108         loopcnt = 0;
1109         while((cnt = lpfc_sli_sum_iocb(phba,
1110                                 &phba->sli.ring[phba->sli.fcp_ring],
1111                                 0, 0, LPFC_CTX_HOST))) {
1112                 spin_unlock_irq(phba->host->host_lock);
1113                 set_current_state(TASK_UNINTERRUPTIBLE);
1114                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1115                 spin_lock_irq(phba->host->host_lock);
1116
1117                 if (++loopcnt
1118                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1119                         break;
1120         }
1121
1122         if (cnt) {
1123                 /* flush all outstanding commands on the host */
1124                 i = lpfc_sli_abort_iocb(phba,
1125                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1126                                 LPFC_CTX_HOST);
1127
1128                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1129                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1130                    phba->brd_no, cnt, i);
1131         }
1132
1133         if (!err_count)
1134                 ret = SUCCESS;
1135
1136         lpfc_free_scsi_buf(lpfc_cmd);
1137         lpfc_printf_log(phba,
1138                         KERN_ERR,
1139                         LOG_FCP,
1140                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1141                         phba->brd_no, ret);
1142 out:
1143         return ret;
1144 }
1145
1146 static int
1147 lpfc_slave_alloc(struct scsi_device *sdev)
1148 {
1149         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1150         struct lpfc_nodelist *ndlp = NULL;
1151         int match = 0;
1152         struct lpfc_scsi_buf *scsi_buf = NULL;
1153         uint32_t total = 0, i;
1154         uint32_t num_to_alloc = 0;
1155         unsigned long flags;
1156         struct list_head *listp;
1157         struct list_head *node_list[6];
1158
1159         /*
1160          * Store the target pointer in the scsi_device hostdata pointer provided
1161          * the driver has already discovered the target id.
1162          */
1163
1164         /* Search the nlp lists other than unmap_list for this target ID */
1165         node_list[0] = &phba->fc_npr_list;
1166         node_list[1] = &phba->fc_nlpmap_list;
1167         node_list[2] = &phba->fc_prli_list;
1168         node_list[3] = &phba->fc_reglogin_list;
1169         node_list[4] = &phba->fc_adisc_list;
1170         node_list[5] = &phba->fc_plogi_list;
1171
1172         for (i = 0; i < 6 && !match; i++) {
1173                 listp = node_list[i];
1174                 if (list_empty(listp))
1175                         continue;
1176                 list_for_each_entry(ndlp, listp, nlp_listp) {
1177                         if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1178                                 match = 1;
1179                                 break;
1180                         }
1181                 }
1182         }
1183
1184         if (!match)
1185                 return -ENXIO;
1186
1187         sdev->hostdata = ndlp->rport->dd_data;
1188
1189         /*
1190          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1191          * available list of scsi buffers.  Don't allocate more than the
1192          * HBA limit conveyed to the midlayer via the host structure.  Note
1193          * that this list of scsi bufs exists for the lifetime of the driver.
1194          */
1195         total = phba->total_scsi_bufs;
1196         num_to_alloc = LPFC_CMD_PER_LUN;
1197         if (total >= phba->cfg_hba_queue_depth) {
1198                 printk(KERN_WARNING "%s, At config limitation of "
1199                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1200                 return 0;
1201         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1202                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1203         }
1204
1205         for (i = 0; i < num_to_alloc; i++) {
1206                 scsi_buf = lpfc_get_scsi_buf(phba);
1207                 if (!scsi_buf) {
1208                         printk(KERN_ERR "%s, failed to allocate "
1209                                "scsi_buf\n", __FUNCTION__);
1210                         break;
1211                 }
1212
1213                 spin_lock_irqsave(phba->host->host_lock, flags);
1214                 phba->total_scsi_bufs++;
1215                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1216                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1217         }
1218         return 0;
1219 }
1220
1221 static int
1222 lpfc_slave_configure(struct scsi_device *sdev)
1223 {
1224         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1225         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1226
1227         if (sdev->tagged_supported)
1228                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1229         else
1230                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1231
1232         /*
1233          * Initialize the fc transport attributes for the target
1234          * containing this scsi device.  Also note that the driver's
1235          * target pointer is stored in the starget_data for the
1236          * driver's sysfs entry point functions.
1237          */
1238         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1239
1240         return 0;
1241 }
1242
1243 static void
1244 lpfc_slave_destroy(struct scsi_device *sdev)
1245 {
1246         sdev->hostdata = NULL;
1247         return;
1248 }
1249
1250 struct scsi_host_template lpfc_template = {
1251         .module                 = THIS_MODULE,
1252         .name                   = LPFC_DRIVER_NAME,
1253         .info                   = lpfc_info,
1254         .queuecommand           = lpfc_queuecommand,
1255         .eh_abort_handler       = lpfc_abort_handler,
1256         .eh_device_reset_handler= lpfc_reset_lun_handler,
1257         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1258         .slave_alloc            = lpfc_slave_alloc,
1259         .slave_configure        = lpfc_slave_configure,
1260         .slave_destroy          = lpfc_slave_destroy,
1261         .this_id                = -1,
1262         .sg_tablesize           = LPFC_SG_SEG_CNT,
1263         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1264         .use_clustering         = ENABLE_CLUSTERING,
1265         .shost_attrs            = lpfc_host_attrs,
1266 };