git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2005 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
  25 #include <scsi/scsi.h>
  26 #include <scsi/scsi_device.h>
  27 #include <scsi/scsi_host.h>
  28 #include <scsi/scsi_tcq.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 #include "lpfc_version.h"
  32 #include "lpfc_hw.h"
  33 #include "lpfc_sli.h"
  34 #include "lpfc_disc.h"
  35 #include "lpfc_scsi.h"
  36 #include "lpfc.h"
  37 #include "lpfc_logmsg.h"
  38 #include "lpfc_crtn.h"
  39
  40 #define LPFC_RESET_WAIT  2
  41 #define LPFC_ABORT_WAIT  2
  42
  43
  44 /*
  45  * This routine allocates a scsi buffer, which contains all the necessary
  46  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  47  * contains information to build the IOCB.  The DMAable region contains
  48  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  49  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  50  * and the BPL BDE is setup in the IOCB.
  51  */
  52 static struct lpfc_scsi_buf *
  53 lpfc_get_scsi_buf(struct lpfc_hba * phba)
  54 {
  55         struct lpfc_scsi_buf *psb;
  56         struct ulp_bde64 *bpl;
  57         IOCB_t *iocb;
  58         dma_addr_t pdma_phys;
  59
  60         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  61         if (!psb)
  62                 return NULL;
  63         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  64         psb->scsi_hba = phba;
  65
  66         /*
  67          * Get memory from the pci pool to map the virt space to pci bus space
  68          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  69          * struct fcp_rsp and the number of bde's necessary to support the
  70          * sg_tablesize.
  71          */
  72         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  73                                                         &psb->dma_handle);
  74         if (!psb->data) {
  75                 kfree(psb);
  76                 return NULL;
  77         }
  78
  79         /* Initialize virtual ptrs to dma_buf region. */
  80         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  81
  82         psb->fcp_cmnd = psb->data;
  83         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  84         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  85                                                         sizeof(struct fcp_rsp);
  86
  87         /* Initialize local short-hand pointers. */
  88         bpl = psb->fcp_bpl;
  89         pdma_phys = psb->dma_handle;
  90
  91         /*
  92          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
  93          * list bdes.  Initialize the first two and leave the rest for
  94          * queuecommand.
  95          */
  96         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
  97         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
  98         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
  99         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 100         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 101         bpl++;
 102
 103         /* Setup the physical region for the FCP RSP */
 104         pdma_phys += sizeof (struct fcp_cmnd);
 105         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 106         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 107         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 108         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 109         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 110
 111         /*
 112          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 113          * initialize it with all known data now.
 114          */
 115         pdma_phys += (sizeof (struct fcp_rsp));
 116         iocb = &psb->cur_iocbq.iocb;
 117         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 118         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 119         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 120         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 121         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 122         iocb->ulpBdeCount = 1;
 123         iocb->ulpClass = CLASS3;
 124
 125         return psb;
 126 }
 127
 128 static void
 129 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
 130 {
 131         struct lpfc_hba *phba = psb->scsi_hba;
 132
 133         /*
 134          * There are only two special cases to consider.  (1) the scsi command
 135          * requested scatter-gather usage or (2) the scsi command allocated
 136          * a request buffer, but did not request use_sg.  There is a third
 137          * case, but it does not require resource deallocation.
 138          */
 139         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 140                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 141                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 142         } else {
 143                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 144                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 145                                                 psb->pCmd->request_bufflen,
 146                                                 psb->pCmd->sc_data_direction);
 147                  }
 148         }
 149
 150         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 151 }
 152
 153 static int
 154 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 155 {
 156         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 157         struct scatterlist *sgel = NULL;
 158         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 159         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 160         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 161         dma_addr_t physaddr;
 162         uint32_t i, num_bde = 0;
 163         int datadir = scsi_cmnd->sc_data_direction;
 164         int dma_error;
 165
 166         /*
 167          * There are three possibilities here - use scatter-gather segment, use
 168          * the single mapping, or neither.  Start the lpfc command prep by
 169          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 170          * data bde entry.
 171          */
 172         bpl += 2;
 173         if (scsi_cmnd->use_sg) {
 174                 /*
 175                  * The driver stores the segment count returned from pci_map_sg
 176                  * because this a count of dma-mappings used to map the use_sg
 177                  * pages.  They are not guaranteed to be the same for those
 178                  * architectures that implement an IOMMU.
 179                  */
 180                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 181                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 182                                                 scsi_cmnd->use_sg, datadir);
 183                 if (lpfc_cmd->seg_cnt == 0)
 184                         return 1;
 185
 186                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 187                         printk(KERN_ERR "%s: Too many sg segments from "
 188                                "dma_map_sg.  Config %d, seg_cnt %d",
 189                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 190                                lpfc_cmd->seg_cnt);
 191                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 192                                      lpfc_cmd->seg_cnt, datadir);
 193                         return 1;
 194                 }
 195
 196                 /*
 197                  * The driver established a maximum scatter-gather segment count
 198                  * during probe that limits the number of sg elements in any
 199                  * single scsi command.  Just run through the seg_cnt and format
 200                  * the bde's.
 201                  */
 202                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 203                         physaddr = sg_dma_address(sgel);
 204                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 205                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 206                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 207                         if (datadir == DMA_TO_DEVICE)
 208                                 bpl->tus.f.bdeFlags = 0;
 209                         else
 210                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 211                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 212                         bpl++;
 213                         sgel++;
 214                         num_bde++;
 215                 }
 216         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 217                 physaddr = dma_map_single(&phba->pcidev->dev,
 218                                           scsi_cmnd->request_buffer,
 219                                           scsi_cmnd->request_bufflen,
 220                                           datadir);
 221                 dma_error = dma_mapping_error(physaddr);
 222                 if (dma_error) {
 223                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 224                                 "%d:0718 Unable to dma_map_single "
 225                                 "request_buffer: x%x\n",
 226                                 phba->brd_no, dma_error);
 227                         return 1;
 228                 }
 229
 230                 lpfc_cmd->nonsg_phys = physaddr;
 231                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 232                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 233                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 234                 if (datadir == DMA_TO_DEVICE)
 235                         bpl->tus.f.bdeFlags = 0;
 236                 else
 237                         bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 238                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 239                 num_bde = 1;
 240                 bpl++;
 241         }
 242
 243         /*
 244          * Finish initializing those IOCB fields that are dependent on the
 245          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 246          * reinitialized since all iocb memory resources are used many times
 247          * for transmit, receive, and continuation bpl's.
 248          */
 249         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 250         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 251                 (num_bde * sizeof (struct ulp_bde64));
 252         iocb_cmd->ulpBdeCount = 1;
 253         iocb_cmd->ulpLe = 1;
 254         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 255         return 0;
 256 }
 257
 258 static void
 259 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 260 {
 261         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 262         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 263         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 264         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 265         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 266         uint32_t resp_info = fcprsp->rspStatus2;
 267         uint32_t scsi_status = fcprsp->rspStatus3;
 268         uint32_t host_status = DID_OK;
 269         uint32_t rsplen = 0;
 270
 271         /*
 272          *  If this is a task management command, there is no
 273          *  scsi packet associated with this lpfc_cmd.  The driver
 274          *  consumes it.
 275          */
 276         if (fcpcmd->fcpCntl2) {
 277                 scsi_status = 0;
 278                 goto out;
 279         }
 280
 281         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 282                         "%d:0730 FCP command failed: RSP "
 283                         "Data: x%x x%x x%x x%x x%x x%x\n",
 284                         phba->brd_no, resp_info, scsi_status,
 285                         be32_to_cpu(fcprsp->rspResId),
 286                         be32_to_cpu(fcprsp->rspSnsLen),
 287                         be32_to_cpu(fcprsp->rspRspLen),
 288                         fcprsp->rspInfo3);
 289
 290         if (resp_info & RSP_LEN_VALID) {
 291                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 292                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 293                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 294                         host_status = DID_ERROR;
 295                         goto out;
 296                 }
 297         }
 298
 299         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 300                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 301                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 302                         snslen = SCSI_SENSE_BUFFERSIZE;
 303
 304                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 305         }
 306
 307         cmnd->resid = 0;
 308         if (resp_info & RESID_UNDER) {
 309                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 310
 311                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 312                                 "%d:0716 FCP Read Underrun, expected %d, "
 313                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 314                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 315                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 316
 317                 /*
 318                  * The cmnd->underflow is the minimum number of bytes that must
 319                  * be transfered for this command.  Provided a sense condition
 320                  * is not present, make sure the actual amount transferred is at
 321                  * least the underflow value or fail.
 322                  */
 323                 if (!(resp_info & SNS_LEN_VALID) &&
 324                     (scsi_status == SAM_STAT_GOOD) &&
 325                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 326                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 327                                         "%d:0717 FCP command x%x residual "
 328                                         "underrun converted to error "
 329                                         "Data: x%x x%x x%x\n", phba->brd_no,
 330                                         cmnd->cmnd[0], cmnd->request_bufflen,
 331                                         cmnd->resid, cmnd->underflow);
 332
 333                         host_status = DID_ERROR;
 334                 }
 335         } else if (resp_info & RESID_OVER) {
 336                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 337                                 "%d:0720 FCP command x%x residual "
 338                                 "overrun error. Data: x%x x%x \n",
 339                                 phba->brd_no, cmnd->cmnd[0],
 340                                 cmnd->request_bufflen, cmnd->resid);
 341                 host_status = DID_ERROR;
 342
 343         /*
 344          * Check SLI validation that all the transfer was actually done
 345          * (fcpi_parm should be zero). Apply check only to reads.
 346          */
 347         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 348                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 349                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 350                         "%d:0734 FCP Read Check Error Data: "
 351                         "x%x x%x x%x x%x\n", phba->brd_no,
 352                         be32_to_cpu(fcpcmd->fcpDl),
 353                         be32_to_cpu(fcprsp->rspResId),
 354                         fcpi_parm, cmnd->cmnd[0]);
 355                 host_status = DID_ERROR;
 356                 cmnd->resid = cmnd->request_bufflen;
 357         }
 358
 359  out:
 360         cmnd->result = ScsiResult(host_status, scsi_status);
 361 }
 362
 363 static void
 364 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 365                         struct lpfc_iocbq *pIocbOut)
 366 {
 367         struct lpfc_scsi_buf *lpfc_cmd =
 368                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 369         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 370         struct lpfc_nodelist *pnode = rdata->pnode;
 371         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 372         unsigned long iflag;
 373
 374         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 375         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 376
 377         if (lpfc_cmd->status) {
 378                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 379                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 380                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 381                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 382                         lpfc_cmd->status = IOSTAT_DEFAULT;
 383
 384                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 385                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 386                                 "x%x result: x%x Data: x%x x%x\n",
 387                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 388                                 cmd->device->lun, lpfc_cmd->status,
 389                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 390                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 391
 392                 switch (lpfc_cmd->status) {
 393                 case IOSTAT_FCP_RSP_ERROR:
 394                         /* Call FCP RSP handler to determine result */
 395                         lpfc_handle_fcp_err(lpfc_cmd);
 396                         break;
 397                 case IOSTAT_NPORT_BSY:
 398                 case IOSTAT_FABRIC_BSY:
 399                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 400                         break;
 401                 default:
 402                         cmd->result = ScsiResult(DID_ERROR, 0);
 403                         break;
 404                 }
 405
 406                 if (pnode) {
 407                         if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
 408                                 cmd->result = ScsiResult(DID_BUS_BUSY,
 409                                         SAM_STAT_BUSY);
 410                 }
 411                 else {
 412                         cmd->result = ScsiResult(DID_NO_CONNECT, 0);
 413                 }
 414         } else {
 415                 cmd->result = ScsiResult(DID_OK, 0);
 416         }
 417
 418         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 419                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 420
 421                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 422                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 423                                 "SNS x%x x%x Data: x%x x%x\n",
 424                                 phba->brd_no, cmd->device->id,
 425                                 cmd->device->lun, cmd, cmd->result,
 426                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 427         }
 428
 429         spin_lock_irqsave(phba->host->host_lock, iflag);
 430         lpfc_free_scsi_buf(lpfc_cmd);
 431         cmd->host_scribble = NULL;
 432         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 433
 434         cmd->scsi_done(cmd);
 435 }
 436
 437 static void
 438 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 439                         struct lpfc_nodelist *pnode)
 440 {
 441         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 442         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 443         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 444         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 445         int datadir = scsi_cmnd->sc_data_direction;
 446
 447         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 448         /* clear task management bits */
 449         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 450
 451         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 452                         &lpfc_cmd->fcp_cmnd->fcp_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         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 552                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 553         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 554
 555         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 556
 557         piocb->ulpContext = ndlp->nlp_rpi;
 558         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 559                 piocb->ulpFCP2Rcvy = 1;
 560         }
 561         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 562
 563         /* ulpTimeout is only one byte */
 564         if (lpfc_cmd->timeout > 0xff) {
 565                 /*
 566                  * Do not timeout the command at the firmware level.
 567                  * The driver will provide the timeout mechanism.
 568                  */
 569                 piocb->ulpTimeout = 0;
 570         } else {
 571                 piocb->ulpTimeout = lpfc_cmd->timeout;
 572         }
 573
 574         lpfc_cmd->rdata = rdata;
 575
 576         switch (task_mgmt_cmd) {
 577         case FCP_LUN_RESET:
 578                 /* Issue LUN Reset to TGT <num> LUN <num> */
 579                 lpfc_printf_log(phba,
 580                                 KERN_INFO,
 581                                 LOG_FCP,
 582                                 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
 583                                 "Data: x%x x%x\n",
 584                                 phba->brd_no,
 585                                 scsi_dev->id, scsi_dev->lun,
 586                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 587
 588                 break;
 589         case FCP_ABORT_TASK_SET:
 590                 /* Issue Abort Task Set to TGT <num> LUN <num> */
 591                 lpfc_printf_log(phba,
 592                                 KERN_INFO,
 593                                 LOG_FCP,
 594                                 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
 595                                 "Data: x%x x%x\n",
 596                                 phba->brd_no,
 597                                 scsi_dev->id, scsi_dev->lun,
 598                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 599
 600                 break;
 601         case FCP_TARGET_RESET:
 602                 /* Issue Target Reset to TGT <num> */
 603                 lpfc_printf_log(phba,
 604                                 KERN_INFO,
 605                                 LOG_FCP,
 606                                 "%d:0702 Issue Target Reset to TGT %d "
 607                                 "Data: x%x x%x\n",
 608                                 phba->brd_no,
 609                                 scsi_dev->id, ndlp->nlp_rpi,
 610                                 ndlp->nlp_flag);
 611                 break;
 612         }
 613
 614         return (1);
 615 }
 616
 617 static int
 618 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
 619 {
 620         struct lpfc_iocbq *iocbq;
 621         struct lpfc_iocbq *iocbqrsp = NULL;
 622         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 623         int ret;
 624
 625         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
 626         if (!ret)
 627                 return FAILED;
 628
 629         lpfc_cmd->scsi_hba = phba;
 630         iocbq = &lpfc_cmd->cur_iocbq;
 631         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 632         if (!iocbqrsp)
 633                 return FAILED;
 634         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 635
 636         iocbq->iocb_flag |= LPFC_IO_POLL;
 637         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 638                      &phba->sli.ring[phba->sli.fcp_ring],
 639                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 640                      iocbqrsp,
 641                      lpfc_cmd->timeout);
 642         if (ret != IOCB_SUCCESS) {
 643                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 644                 ret = FAILED;
 645         } else {
 646                 ret = SUCCESS;
 647                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 648                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 649                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 650                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 651                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 652         }
 653
 654         /*
 655          * All outstanding txcmplq I/Os should have been aborted by the target.
 656          * Unfortunately, some targets do not abide by this forcing the driver
 657          * to double check.
 658          */
 659         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 660                             lpfc_cmd->pCmd->device->id,
 661                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 662
 663         /* Return response IOCB to free list. */
 664         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
 665         return ret;
 666 }
 667
 668 static void
 669 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 670                             struct lpfc_iocbq *pIocbOut)
 671 {
 672         unsigned long iflag;
 673         struct lpfc_scsi_buf *lpfc_cmd =
 674                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 675
 676         spin_lock_irqsave(phba->host->host_lock, iflag);
 677         lpfc_free_scsi_buf(lpfc_cmd);
 678         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 679 }
 680
 681 static void
 682 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 683                                 struct lpfc_iocbq *pIocbIn,
 684                                 struct lpfc_iocbq *pIocbOut)
 685 {
 686         struct scsi_cmnd *ml_cmd =
 687                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 688
 689         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 690         ml_cmd->host_scribble = NULL;
 691 }
 692
 693 const char *
 694 lpfc_info(struct Scsi_Host *host)
 695 {
 696         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 697         int len;
 698         static char  lpfcinfobuf[384];
 699
 700         memset(lpfcinfobuf,0,384);
 701         if (phba && phba->pcidev){
 702                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 703                 len = strlen(lpfcinfobuf);
 704                 snprintf(lpfcinfobuf + len,
 705                         384-len,
 706                         " on PCI bus %02x device %02x irq %d",
 707                         phba->pcidev->bus->number,
 708                         phba->pcidev->devfn,
 709                         phba->pcidev->irq);
 710                 len = strlen(lpfcinfobuf);
 711                 if (phba->Port[0]) {
 712                         snprintf(lpfcinfobuf + len,
 713                                  384-len,
 714                                  " port %s",
 715                                  phba->Port);
 716                 }
 717         }
 718         return lpfcinfobuf;
 719 }
 720
 721 static int
 722 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 723 {
 724         struct lpfc_hba *phba =
 725                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 726         struct lpfc_sli *psli = &phba->sli;
 727         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 728         struct lpfc_nodelist *ndlp = rdata->pnode;
 729         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 730         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 731         int err = 0;
 732
 733         /*
 734          * The target pointer is guaranteed not to be NULL because the driver
 735          * only clears the device->hostdata field in lpfc_slave_destroy.  This
 736          * approach guarantees no further IO calls on this target.
 737          */
 738         if (!ndlp) {
 739                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 740                 goto out_fail_command;
 741         }
 742
 743         /*
 744          * A Fibre Channel target is present and functioning only when the node
 745          * state is MAPPED.  Any other state is a failure.
 746          */
 747         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
 748                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
 749                     (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
 750                         cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 751                         goto out_fail_command;
 752                 }
 753                 else if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
 754                         cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 755                         goto out_fail_command;
 756                 }
 757                 /*
 758                  * The device is most likely recovered and the driver
 759                  * needs a bit more time to finish.  Ask the midlayer
 760                  * to retry.
 761                  */
 762                 goto out_host_busy;
 763         }
 764
 765         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 766         if (lpfc_cmd == NULL) {
 767                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 768                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 769                 goto out_host_busy;
 770         }
 771
 772         /*
 773          * Store the midlayer's command structure for the completion phase
 774          * and complete the command initialization.
 775          */
 776         lpfc_cmd->pCmd  = cmnd;
 777         lpfc_cmd->rdata = rdata;
 778         lpfc_cmd->timeout = 0;
 779         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 780         cmnd->scsi_done = done;
 781
 782         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 783         if (err)
 784                 goto out_host_busy_free_buf;
 785
 786         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 787
 788         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 789                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 790         if (err)
 791                 goto out_host_busy_free_buf;
 792         return 0;
 793
 794  out_host_busy_free_buf:
 795         lpfc_free_scsi_buf(lpfc_cmd);
 796         cmnd->host_scribble = NULL;
 797  out_host_busy:
 798         return SCSI_MLQUEUE_HOST_BUSY;
 799
 800  out_fail_command:
 801         done(cmnd);
 802         return 0;
 803 }
 804
 805 static int
 806 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 807 {
 808         struct lpfc_hba *phba =
 809                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 810         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 811         struct lpfc_iocbq *iocb, *next_iocb;
 812         struct lpfc_iocbq *abtsiocb = NULL;
 813         struct lpfc_scsi_buf *lpfc_cmd;
 814         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 815         IOCB_t *cmd, *icmd;
 816         unsigned long snum;
 817         unsigned int id, lun;
 818         unsigned int loop_count = 0;
 819         int ret = IOCB_SUCCESS;
 820
 821         /*
 822          * If the host_scribble data area is NULL, then the driver has already
 823          * completed this command, but the midlayer did not see the completion
 824          * before the eh fired.  Just return SUCCESS.
 825          */
 826         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 827         if (!lpfc_cmd)
 828                 return SUCCESS;
 829
 830         /* save these now since lpfc_cmd can be freed */
 831         id   = lpfc_cmd->pCmd->device->id;
 832         lun  = lpfc_cmd->pCmd->device->lun;
 833         snum = lpfc_cmd->pCmd->serial_number;
 834
 835         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 836                 cmd = &iocb->iocb;
 837                 if (iocb->context1 != lpfc_cmd)
 838                         continue;
 839
 840                 list_del_init(&iocb->list);
 841                 pring->txq_cnt--;
 842                 if (!iocb->iocb_cmpl) {
 843                         list_add_tail(&iocb->list, lpfc_iocb_list);
 844                 }
 845                 else {
 846                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 847                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 848                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 849                 }
 850
 851                 goto out;
 852         }
 853
 854         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 855         if (abtsiocb == NULL)
 856                 return FAILED;
 857
 858         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 859
 860         /*
 861          * The scsi command was not in the txq.  Check the txcmplq and if it is
 862          * found, send an abort to the FW.
 863          */
 864         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 865                 if (iocb->context1 != lpfc_cmd)
 866                         continue;
 867
 868                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 869                 cmd = &iocb->iocb;
 870                 icmd = &abtsiocb->iocb;
 871                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 872                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 873                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 874
 875                 icmd->ulpLe = 1;
 876                 icmd->ulpClass = cmd->ulpClass;
 877                 if (phba->hba_state >= LPFC_LINK_UP)
 878                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 879                 else
 880                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 881
 882                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 883                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 884                                                                 IOCB_ERROR) {
 885                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 886                         ret = IOCB_ERROR;
 887                         break;
 888                 }
 889
 890                 /* Wait for abort to complete */
 891                 while (cmnd->host_scribble)
 892                 {
 893                         spin_unlock_irq(phba->host->host_lock);
 894                         set_current_state(TASK_UNINTERRUPTIBLE);
 895                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 896                         spin_lock_irq(phba->host->host_lock);
 897                         if (++loop_count
 898                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 899                                 break;
 900                 }
 901
 902                 if(cmnd->host_scribble) {
 903                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 904                                         "%d:0748 abort handler timed "
 905                                         "out waiting for abort to "
 906                                         "complete. Data: "
 907                                         "x%x x%x x%x x%lx\n",
 908                                         phba->brd_no, ret, id, lun, snum);
 909                         cmnd->host_scribble = NULL;
 910                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 911                         ret = IOCB_ERROR;
 912                 }
 913
 914                 break;
 915         }
 916
 917  out:
 918         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 919                         "%d:0749 SCSI layer issued abort device "
 920                         "Data: x%x x%x x%x x%lx\n",
 921                         phba->brd_no, ret, id, lun, snum);
 922
 923         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 924 }
 925
 926 static int
 927 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 928 {
 929         int rc;
 930         spin_lock_irq(cmnd->device->host->host_lock);
 931         rc = __lpfc_abort_handler(cmnd);
 932         spin_unlock_irq(cmnd->device->host->host_lock);
 933         return rc;
 934 }
 935
 936 static int
 937 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 938 {
 939         struct Scsi_Host *shost = cmnd->device->host;
 940         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 941         struct lpfc_sli *psli = &phba->sli;
 942         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 943         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 944         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 945         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 946         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 947         struct lpfc_nodelist *pnode = rdata->pnode;
 948         int ret = FAILED;
 949         int cnt, loopcnt;
 950
 951         /*
 952          * If target is not in a MAPPED state, delay the reset until
 953          * target is rediscovered or nodev timeout expires.
 954          */
 955         while ( 1 ) {
 956                 if (!pnode)
 957                         break;
 958
 959                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 960                         spin_unlock_irq(phba->host->host_lock);
 961                         set_current_state(TASK_UNINTERRUPTIBLE);
 962                         schedule_timeout( HZ/2);
 963                         spin_lock_irq(phba->host->host_lock);
 964                 }
 965                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 966                         break;
 967         }
 968
 969         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 970         if (lpfc_cmd == NULL)
 971                 goto out;
 972
 973         lpfc_cmd->pCmd = cmnd;
 974         lpfc_cmd->timeout = 60;
 975         lpfc_cmd->scsi_hba = phba;
 976
 977         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 978         if (!ret)
 979                 goto out_free_scsi_buf;
 980
 981         iocbq = &lpfc_cmd->cur_iocbq;
 982
 983         /* get a buffer for this IOCB command response */
 984         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 985         if (iocbqrsp == NULL)
 986                 goto out_free_scsi_buf;
 987
 988         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 989
 990         iocbq->iocb_flag |= LPFC_IO_POLL;
 991         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 992
 993         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 994                      &phba->sli.ring[psli->fcp_ring],
 995                      iocbq, 0, iocbqrsp, 60);
 996         if (ret == IOCB_SUCCESS)
 997                 ret = SUCCESS;
 998
 999         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
1000         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1001         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
1002                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
1003                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1004
1005         /*
1006          * All outstanding txcmplq I/Os should have been aborted by the target.
1007          * Unfortunately, some targets do not abide by this forcing the driver
1008          * to double check.
1009          */
1010         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1011                             cmnd->device->id, cmnd->device->lun, 0,
1012                             LPFC_CTX_LUN);
1013
1014         loopcnt = 0;
1015         while((cnt = lpfc_sli_sum_iocb(phba,
1016                                        &phba->sli.ring[phba->sli.fcp_ring],
1017                                        cmnd->device->id, cmnd->device->lun,
1018                                        LPFC_CTX_LUN))) {
1019                 spin_unlock_irq(phba->host->host_lock);
1020                 set_current_state(TASK_UNINTERRUPTIBLE);
1021                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1022                 spin_lock_irq(phba->host->host_lock);
1023
1024                 if (++loopcnt
1025                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1026                         break;
1027         }
1028
1029         if (cnt) {
1030                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1031                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1032                         phba->brd_no, cnt);
1033         }
1034
1035         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1036
1037 out_free_scsi_buf:
1038         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1039                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1040                         "Data: x%x x%x x%x\n",
1041                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1042                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1043                         lpfc_cmd->result);
1044         lpfc_free_scsi_buf(lpfc_cmd);
1045 out:
1046         return ret;
1047 }
1048
1049 static int
1050 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1051 {
1052         int rc;
1053         spin_lock_irq(cmnd->device->host->host_lock);
1054         rc = __lpfc_reset_lun_handler(cmnd);
1055         spin_unlock_irq(cmnd->device->host->host_lock);
1056         return rc;
1057 }
1058
1059 /*
1060  * Note: midlayer calls this function with the host_lock held
1061  */
1062 static int
1063 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1064 {
1065         struct Scsi_Host *shost = cmnd->device->host;
1066         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1067         struct lpfc_nodelist *ndlp = NULL;
1068         int match;
1069         int ret = FAILED, i, err_count = 0;
1070         int cnt, loopcnt;
1071         unsigned int midlayer_id = 0;
1072         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1073         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1074
1075         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1076         if (lpfc_cmd == NULL)
1077                 goto out;
1078
1079         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1080         lpfc_cmd->timeout = 60;
1081         lpfc_cmd->pCmd = cmnd;
1082         lpfc_cmd->scsi_hba = phba;
1083
1084         /*
1085          * Since the driver manages a single bus device, reset all
1086          * targets known to the driver.  Should any target reset
1087          * fail, this routine returns failure to the midlayer.
1088          */
1089         midlayer_id = cmnd->device->id;
1090         for (i = 0; i < MAX_FCP_TARGET; i++) {
1091                 /* Search the mapped list for this target ID */
1092                 match = 0;
1093                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1094                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1095                                 match = 1;
1096                                 break;
1097                         }
1098                 }
1099                 if (!match)
1100                         continue;
1101
1102                 lpfc_cmd->pCmd->device->id = i;
1103                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1104                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1105                 if (ret != SUCCESS) {
1106                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1107                                 "%d:0713 Bus Reset on target %d failed\n",
1108                                 phba->brd_no, i);
1109                         err_count++;
1110                 }
1111         }
1112
1113         cmnd->device->id = midlayer_id;
1114         loopcnt = 0;
1115         while((cnt = lpfc_sli_sum_iocb(phba,
1116                                 &phba->sli.ring[phba->sli.fcp_ring],
1117                                 0, 0, LPFC_CTX_HOST))) {
1118                 spin_unlock_irq(phba->host->host_lock);
1119                 set_current_state(TASK_UNINTERRUPTIBLE);
1120                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1121                 spin_lock_irq(phba->host->host_lock);
1122
1123                 if (++loopcnt
1124                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1125                         break;
1126         }
1127
1128         if (cnt) {
1129                 /* flush all outstanding commands on the host */
1130                 i = lpfc_sli_abort_iocb(phba,
1131                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1132                                 LPFC_CTX_HOST);
1133
1134                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1135                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1136                    phba->brd_no, cnt, i);
1137         }
1138
1139         if (!err_count)
1140                 ret = SUCCESS;
1141
1142         lpfc_free_scsi_buf(lpfc_cmd);
1143         lpfc_printf_log(phba,
1144                         KERN_ERR,
1145                         LOG_FCP,
1146                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1147                         phba->brd_no, ret);
1148 out:
1149         return ret;
1150 }
1151
1152 static int
1153 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1154 {
1155         int rc;
1156         spin_lock_irq(cmnd->device->host->host_lock);
1157         rc = __lpfc_reset_bus_handler(cmnd);
1158         spin_unlock_irq(cmnd->device->host->host_lock);
1159         return rc;
1160 }
1161
1162 static int
1163 lpfc_slave_alloc(struct scsi_device *sdev)
1164 {
1165         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1166         struct lpfc_nodelist *ndlp = NULL;
1167         int match = 0;
1168         struct lpfc_scsi_buf *scsi_buf = NULL;
1169         uint32_t total = 0, i;
1170         uint32_t num_to_alloc = 0;
1171         unsigned long flags;
1172         struct list_head *listp;
1173         struct list_head *node_list[6];
1174
1175         /*
1176          * Store the target pointer in the scsi_device hostdata pointer provided
1177          * the driver has already discovered the target id.
1178          */
1179
1180         /* Search the nlp lists other than unmap_list for this target ID */
1181         node_list[0] = &phba->fc_npr_list;
1182         node_list[1] = &phba->fc_nlpmap_list;
1183         node_list[2] = &phba->fc_prli_list;
1184         node_list[3] = &phba->fc_reglogin_list;
1185         node_list[4] = &phba->fc_adisc_list;
1186         node_list[5] = &phba->fc_plogi_list;
1187
1188         for (i = 0; i < 6 && !match; i++) {
1189                 listp = node_list[i];
1190                 if (list_empty(listp))
1191                         continue;
1192                 list_for_each_entry(ndlp, listp, nlp_listp) {
1193                         if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1194                                 match = 1;
1195                                 break;
1196                         }
1197                 }
1198         }
1199
1200         if (!match)
1201                 return -ENXIO;
1202
1203         sdev->hostdata = ndlp->rport->dd_data;
1204
1205         /*
1206          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1207          * available list of scsi buffers.  Don't allocate more than the
1208          * HBA limit conveyed to the midlayer via the host structure.  Note
1209          * that this list of scsi bufs exists for the lifetime of the driver.
1210          */
1211         total = phba->total_scsi_bufs;
1212         num_to_alloc = LPFC_CMD_PER_LUN;
1213         if (total >= phba->cfg_hba_queue_depth) {
1214                 printk(KERN_WARNING "%s, At config limitation of "
1215                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1216                 return 0;
1217         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1218                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1219         }
1220
1221         for (i = 0; i < num_to_alloc; i++) {
1222                 scsi_buf = lpfc_get_scsi_buf(phba);
1223                 if (!scsi_buf) {
1224                         printk(KERN_ERR "%s, failed to allocate "
1225                                "scsi_buf\n", __FUNCTION__);
1226                         break;
1227                 }
1228
1229                 spin_lock_irqsave(phba->host->host_lock, flags);
1230                 phba->total_scsi_bufs++;
1231                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1232                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1233         }
1234         return 0;
1235 }
1236
1237 static int
1238 lpfc_slave_configure(struct scsi_device *sdev)
1239 {
1240         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1241         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1242
1243         if (sdev->tagged_supported)
1244                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1245         else
1246                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1247
1248         /*
1249          * Initialize the fc transport attributes for the target
1250          * containing this scsi device.  Also note that the driver's
1251          * target pointer is stored in the starget_data for the
1252          * driver's sysfs entry point functions.
1253          */
1254         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1255
1256         return 0;
1257 }
1258
1259 static void
1260 lpfc_slave_destroy(struct scsi_device *sdev)
1261 {
1262         sdev->hostdata = NULL;
1263         return;
1264 }
1265
1266 struct scsi_host_template lpfc_template = {
1267         .module                 = THIS_MODULE,
1268         .name                   = LPFC_DRIVER_NAME,
1269         .info                   = lpfc_info,
1270         .queuecommand           = lpfc_queuecommand,
1271         .eh_abort_handler       = lpfc_abort_handler,
1272         .eh_device_reset_handler= lpfc_reset_lun_handler,
1273         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1274         .slave_alloc            = lpfc_slave_alloc,
1275         .slave_configure        = lpfc_slave_configure,
1276         .slave_destroy          = lpfc_slave_destroy,
1277         .this_id                = -1,
1278         .sg_tablesize           = LPFC_SG_SEG_CNT,
1279         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1280         .use_clustering         = ENABLE_CLUSTERING,
1281         .shost_attrs            = lpfc_host_attrs,
1282         .max_sectors            = 0xFFFF,
1283 };