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 == NULL )
 407                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 408                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 409         } else {
 410                 cmd->result = ScsiResult(DID_OK, 0);
 411         }
 412
 413         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 414                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 415
 416                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 417                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 418                                 "SNS x%x x%x Data: x%x x%x\n",
 419                                 phba->brd_no, cmd->device->id,
 420                                 cmd->device->lun, cmd, cmd->result,
 421                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 422         }
 423
 424         spin_lock_irqsave(phba->host->host_lock, iflag);
 425         lpfc_free_scsi_buf(lpfc_cmd);
 426         cmd->host_scribble = NULL;
 427         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 428
 429         cmd->scsi_done(cmd);
 430 }
 431
 432 static void
 433 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 434                         struct lpfc_nodelist *pnode)
 435 {
 436         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 437         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 438         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 439         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 440         int datadir = scsi_cmnd->sc_data_direction;
 441
 442         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 443         /* clear task management bits */
 444         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 445
 446         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 447                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 448
 449         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 450
 451         if (scsi_cmnd->device->tagged_supported) {
 452                 switch (scsi_cmnd->tag) {
 453                 case HEAD_OF_QUEUE_TAG:
 454                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 455                         break;
 456                 case ORDERED_QUEUE_TAG:
 457                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 458                         break;
 459                 default:
 460                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 461                         break;
 462                 }
 463         } else
 464                 fcp_cmnd->fcpCntl1 = 0;
 465
 466         /*
 467          * There are three possibilities here - use scatter-gather segment, use
 468          * the single mapping, or neither.  Start the lpfc command prep by
 469          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 470          * data bde entry.
 471          */
 472         if (scsi_cmnd->use_sg) {
 473                 if (datadir == DMA_TO_DEVICE) {
 474                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 475                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 476                         iocb_cmd->ulpPU = 0;
 477                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 478                         phba->fc4OutputRequests++;
 479                 } else {
 480                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 481                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 482                         iocb_cmd->un.fcpi.fcpi_parm =
 483                                 scsi_cmnd->request_bufflen;
 484                         fcp_cmnd->fcpCntl3 = READ_DATA;
 485                         phba->fc4InputRequests++;
 486                 }
 487         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 488                 if (datadir == DMA_TO_DEVICE) {
 489                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 490                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 491                         iocb_cmd->ulpPU = 0;
 492                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 493                         phba->fc4OutputRequests++;
 494                 } else {
 495                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 496                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 497                         iocb_cmd->un.fcpi.fcpi_parm =
 498                                 scsi_cmnd->request_bufflen;
 499                         fcp_cmnd->fcpCntl3 = READ_DATA;
 500                         phba->fc4InputRequests++;
 501                 }
 502         } else {
 503                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 504                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 505                 iocb_cmd->ulpPU = 0;
 506                 fcp_cmnd->fcpCntl3 = 0;
 507                 phba->fc4ControlRequests++;
 508         }
 509
 510         /*
 511          * Finish initializing those IOCB fields that are independent
 512          * of the scsi_cmnd request_buffer
 513          */
 514         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 515         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 516                 piocbq->iocb.ulpFCP2Rcvy = 1;
 517
 518         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 519         piocbq->context1  = lpfc_cmd;
 520         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 521         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 522 }
 523
 524 static int
 525 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 526                              struct lpfc_scsi_buf *lpfc_cmd,
 527                              uint8_t task_mgmt_cmd)
 528 {
 529         struct lpfc_sli *psli;
 530         struct lpfc_iocbq *piocbq;
 531         IOCB_t *piocb;
 532         struct fcp_cmnd *fcp_cmnd;
 533         struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
 534         struct lpfc_rport_data *rdata = scsi_dev->hostdata;
 535         struct lpfc_nodelist *ndlp = rdata->pnode;
 536
 537         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 538                 return 0;
 539         }
 540
 541         psli = &phba->sli;
 542         piocbq = &(lpfc_cmd->cur_iocbq);
 543         piocb = &piocbq->iocb;
 544
 545         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 546         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 547                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 548         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 549
 550         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 551
 552         piocb->ulpContext = ndlp->nlp_rpi;
 553         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 554                 piocb->ulpFCP2Rcvy = 1;
 555         }
 556         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 557
 558         /* ulpTimeout is only one byte */
 559         if (lpfc_cmd->timeout > 0xff) {
 560                 /*
 561                  * Do not timeout the command at the firmware level.
 562                  * The driver will provide the timeout mechanism.
 563                  */
 564                 piocb->ulpTimeout = 0;
 565         } else {
 566                 piocb->ulpTimeout = lpfc_cmd->timeout;
 567         }
 568
 569         lpfc_cmd->rdata = rdata;
 570
 571         switch (task_mgmt_cmd) {
 572         case FCP_LUN_RESET:
 573                 /* Issue LUN Reset to TGT <num> LUN <num> */
 574                 lpfc_printf_log(phba,
 575                                 KERN_INFO,
 576                                 LOG_FCP,
 577                                 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
 578                                 "Data: x%x x%x\n",
 579                                 phba->brd_no,
 580                                 scsi_dev->id, scsi_dev->lun,
 581                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 582
 583                 break;
 584         case FCP_ABORT_TASK_SET:
 585                 /* Issue Abort Task Set to TGT <num> LUN <num> */
 586                 lpfc_printf_log(phba,
 587                                 KERN_INFO,
 588                                 LOG_FCP,
 589                                 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
 590                                 "Data: x%x x%x\n",
 591                                 phba->brd_no,
 592                                 scsi_dev->id, scsi_dev->lun,
 593                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 594
 595                 break;
 596         case FCP_TARGET_RESET:
 597                 /* Issue Target Reset to TGT <num> */
 598                 lpfc_printf_log(phba,
 599                                 KERN_INFO,
 600                                 LOG_FCP,
 601                                 "%d:0702 Issue Target Reset to TGT %d "
 602                                 "Data: x%x x%x\n",
 603                                 phba->brd_no,
 604                                 scsi_dev->id, ndlp->nlp_rpi,
 605                                 ndlp->nlp_flag);
 606                 break;
 607         }
 608
 609         return (1);
 610 }
 611
 612 static int
 613 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
 614 {
 615         struct lpfc_iocbq *iocbq;
 616         struct lpfc_iocbq *iocbqrsp = NULL;
 617         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 618         int ret;
 619
 620         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
 621         if (!ret)
 622                 return FAILED;
 623
 624         lpfc_cmd->scsi_hba = phba;
 625         iocbq = &lpfc_cmd->cur_iocbq;
 626         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 627         if (!iocbqrsp)
 628                 return FAILED;
 629         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 630
 631         iocbq->iocb_flag |= LPFC_IO_POLL;
 632         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 633                      &phba->sli.ring[phba->sli.fcp_ring],
 634                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 635                      iocbqrsp,
 636                      lpfc_cmd->timeout);
 637         if (ret != IOCB_SUCCESS) {
 638                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 639                 ret = FAILED;
 640         } else {
 641                 ret = SUCCESS;
 642                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 643                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 644                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 645                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 646                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 647         }
 648
 649         /*
 650          * All outstanding txcmplq I/Os should have been aborted by the target.
 651          * Unfortunately, some targets do not abide by this forcing the driver
 652          * to double check.
 653          */
 654         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 655                             lpfc_cmd->pCmd->device->id,
 656                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 657
 658         /* Return response IOCB to free list. */
 659         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
 660         return ret;
 661 }
 662
 663 static void
 664 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 665                             struct lpfc_iocbq *pIocbOut)
 666 {
 667         unsigned long iflag;
 668         struct lpfc_scsi_buf *lpfc_cmd =
 669                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 670
 671         spin_lock_irqsave(phba->host->host_lock, iflag);
 672         lpfc_free_scsi_buf(lpfc_cmd);
 673         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 674 }
 675
 676 static void
 677 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 678                                 struct lpfc_iocbq *pIocbIn,
 679                                 struct lpfc_iocbq *pIocbOut)
 680 {
 681         struct scsi_cmnd *ml_cmd =
 682                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 683
 684         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 685         ml_cmd->host_scribble = NULL;
 686 }
 687
 688 const char *
 689 lpfc_info(struct Scsi_Host *host)
 690 {
 691         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 692         int len;
 693         static char  lpfcinfobuf[384];
 694
 695         memset(lpfcinfobuf,0,384);
 696         if (phba && phba->pcidev){
 697                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 698                 len = strlen(lpfcinfobuf);
 699                 snprintf(lpfcinfobuf + len,
 700                         384-len,
 701                         " on PCI bus %02x device %02x irq %d",
 702                         phba->pcidev->bus->number,
 703                         phba->pcidev->devfn,
 704                         phba->pcidev->irq);
 705                 len = strlen(lpfcinfobuf);
 706                 if (phba->Port[0]) {
 707                         snprintf(lpfcinfobuf + len,
 708                                  384-len,
 709                                  " port %s",
 710                                  phba->Port);
 711                 }
 712         }
 713         return lpfcinfobuf;
 714 }
 715
 716 static int
 717 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 718 {
 719         struct lpfc_hba *phba =
 720                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 721         struct lpfc_sli *psli = &phba->sli;
 722         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 723         struct lpfc_nodelist *ndlp = rdata->pnode;
 724         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 725         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 726         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 727         int err;
 728
 729         err = fc_remote_port_chkready(rport);
 730         if (err) {
 731                 cmnd->result = err;
 732                 goto out_fail_command;
 733         }
 734
 735         /*
 736          * Catch race where our node has transitioned, but the
 737          * transport is still transitioning.
 738          */
 739         if (!ndlp) {
 740                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 741                 goto out_fail_command;
 742         }
 743
 744         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 745         if (lpfc_cmd == NULL) {
 746                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 747                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 748                 goto out_host_busy;
 749         }
 750
 751         /*
 752          * Store the midlayer's command structure for the completion phase
 753          * and complete the command initialization.
 754          */
 755         lpfc_cmd->pCmd  = cmnd;
 756         lpfc_cmd->rdata = rdata;
 757         lpfc_cmd->timeout = 0;
 758         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 759         cmnd->scsi_done = done;
 760
 761         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 762         if (err)
 763                 goto out_host_busy_free_buf;
 764
 765         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 766
 767         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 768                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 769         if (err)
 770                 goto out_host_busy_free_buf;
 771         return 0;
 772
 773  out_host_busy_free_buf:
 774         lpfc_free_scsi_buf(lpfc_cmd);
 775         cmnd->host_scribble = NULL;
 776  out_host_busy:
 777         return SCSI_MLQUEUE_HOST_BUSY;
 778
 779  out_fail_command:
 780         done(cmnd);
 781         return 0;
 782 }
 783
 784 static int
 785 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 786 {
 787         struct lpfc_hba *phba =
 788                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 789         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 790         struct lpfc_iocbq *iocb, *next_iocb;
 791         struct lpfc_iocbq *abtsiocb = NULL;
 792         struct lpfc_scsi_buf *lpfc_cmd;
 793         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 794         IOCB_t *cmd, *icmd;
 795         unsigned long snum;
 796         unsigned int id, lun;
 797         unsigned int loop_count = 0;
 798         int ret = IOCB_SUCCESS;
 799
 800         /*
 801          * If the host_scribble data area is NULL, then the driver has already
 802          * completed this command, but the midlayer did not see the completion
 803          * before the eh fired.  Just return SUCCESS.
 804          */
 805         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 806         if (!lpfc_cmd)
 807                 return SUCCESS;
 808
 809         /* save these now since lpfc_cmd can be freed */
 810         id   = lpfc_cmd->pCmd->device->id;
 811         lun  = lpfc_cmd->pCmd->device->lun;
 812         snum = lpfc_cmd->pCmd->serial_number;
 813
 814         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 815                 cmd = &iocb->iocb;
 816                 if (iocb->context1 != lpfc_cmd)
 817                         continue;
 818
 819                 list_del_init(&iocb->list);
 820                 pring->txq_cnt--;
 821                 if (!iocb->iocb_cmpl) {
 822                         list_add_tail(&iocb->list, lpfc_iocb_list);
 823                 }
 824                 else {
 825                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 826                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 827                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 828                 }
 829
 830                 goto out;
 831         }
 832
 833         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 834         if (abtsiocb == NULL)
 835                 return FAILED;
 836
 837         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 838
 839         /*
 840          * The scsi command was not in the txq.  Check the txcmplq and if it is
 841          * found, send an abort to the FW.
 842          */
 843         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 844                 if (iocb->context1 != lpfc_cmd)
 845                         continue;
 846
 847                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 848                 cmd = &iocb->iocb;
 849                 icmd = &abtsiocb->iocb;
 850                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 851                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 852                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 853
 854                 icmd->ulpLe = 1;
 855                 icmd->ulpClass = cmd->ulpClass;
 856                 if (phba->hba_state >= LPFC_LINK_UP)
 857                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 858                 else
 859                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 860
 861                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 862                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 863                                                                 IOCB_ERROR) {
 864                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 865                         ret = IOCB_ERROR;
 866                         break;
 867                 }
 868
 869                 /* Wait for abort to complete */
 870                 while (cmnd->host_scribble)
 871                 {
 872                         spin_unlock_irq(phba->host->host_lock);
 873                         set_current_state(TASK_UNINTERRUPTIBLE);
 874                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 875                         spin_lock_irq(phba->host->host_lock);
 876                         if (++loop_count
 877                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 878                                 break;
 879                 }
 880
 881                 if(cmnd->host_scribble) {
 882                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 883                                         "%d:0748 abort handler timed "
 884                                         "out waiting for abort to "
 885                                         "complete. Data: "
 886                                         "x%x x%x x%x x%lx\n",
 887                                         phba->brd_no, ret, id, lun, snum);
 888                         cmnd->host_scribble = NULL;
 889                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 890                         ret = IOCB_ERROR;
 891                 }
 892
 893                 break;
 894         }
 895
 896  out:
 897         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 898                         "%d:0749 SCSI layer issued abort device "
 899                         "Data: x%x x%x x%x x%lx\n",
 900                         phba->brd_no, ret, id, lun, snum);
 901
 902         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 903 }
 904
 905 static int
 906 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 907 {
 908         int rc;
 909         spin_lock_irq(cmnd->device->host->host_lock);
 910         rc = __lpfc_abort_handler(cmnd);
 911         spin_unlock_irq(cmnd->device->host->host_lock);
 912         return rc;
 913 }
 914
 915 static int
 916 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 917 {
 918         struct Scsi_Host *shost = cmnd->device->host;
 919         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 920         struct lpfc_sli *psli = &phba->sli;
 921         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 922         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 923         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 924         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 925         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 926         struct lpfc_nodelist *pnode = rdata->pnode;
 927         int ret = FAILED;
 928         int cnt, loopcnt;
 929
 930         /*
 931          * If target is not in a MAPPED state, delay the reset until
 932          * target is rediscovered or nodev timeout expires.
 933          */
 934         while ( 1 ) {
 935                 if (!pnode)
 936                         break;
 937
 938                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 939                         spin_unlock_irq(phba->host->host_lock);
 940                         set_current_state(TASK_UNINTERRUPTIBLE);
 941                         schedule_timeout( HZ/2);
 942                         spin_lock_irq(phba->host->host_lock);
 943                 }
 944                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 945                         break;
 946         }
 947
 948         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 949         if (lpfc_cmd == NULL)
 950                 goto out;
 951
 952         lpfc_cmd->pCmd = cmnd;
 953         lpfc_cmd->timeout = 60;
 954         lpfc_cmd->scsi_hba = phba;
 955
 956         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 957         if (!ret)
 958                 goto out_free_scsi_buf;
 959
 960         iocbq = &lpfc_cmd->cur_iocbq;
 961
 962         /* get a buffer for this IOCB command response */
 963         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 964         if (iocbqrsp == NULL)
 965                 goto out_free_scsi_buf;
 966
 967         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 968
 969         iocbq->iocb_flag |= LPFC_IO_POLL;
 970         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 971
 972         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 973                      &phba->sli.ring[psli->fcp_ring],
 974                      iocbq, 0, iocbqrsp, 60);
 975         if (ret == IOCB_SUCCESS)
 976                 ret = SUCCESS;
 977
 978         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 979         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 980         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
 981                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
 982                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 983
 984         /*
 985          * All outstanding txcmplq I/Os should have been aborted by the target.
 986          * Unfortunately, some targets do not abide by this forcing the driver
 987          * to double check.
 988          */
 989         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 990                             cmnd->device->id, cmnd->device->lun, 0,
 991                             LPFC_CTX_LUN);
 992
 993         loopcnt = 0;
 994         while((cnt = lpfc_sli_sum_iocb(phba,
 995                                        &phba->sli.ring[phba->sli.fcp_ring],
 996                                        cmnd->device->id, cmnd->device->lun,
 997                                        LPFC_CTX_LUN))) {
 998                 spin_unlock_irq(phba->host->host_lock);
 999                 set_current_state(TASK_UNINTERRUPTIBLE);
1000                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1001                 spin_lock_irq(phba->host->host_lock);
1002
1003                 if (++loopcnt
1004                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1005                         break;
1006         }
1007
1008         if (cnt) {
1009                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1010                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1011                         phba->brd_no, cnt);
1012         }
1013
1014         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1015
1016 out_free_scsi_buf:
1017         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1018                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1019                         "Data: x%x x%x x%x\n",
1020                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1021                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1022                         lpfc_cmd->result);
1023         lpfc_free_scsi_buf(lpfc_cmd);
1024 out:
1025         return ret;
1026 }
1027
1028 static int
1029 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1030 {
1031         int rc;
1032         spin_lock_irq(cmnd->device->host->host_lock);
1033         rc = __lpfc_reset_lun_handler(cmnd);
1034         spin_unlock_irq(cmnd->device->host->host_lock);
1035         return rc;
1036 }
1037
1038 /*
1039  * Note: midlayer calls this function with the host_lock held
1040  */
1041 static int
1042 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1043 {
1044         struct Scsi_Host *shost = cmnd->device->host;
1045         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1046         struct lpfc_nodelist *ndlp = NULL;
1047         int match;
1048         int ret = FAILED, i, err_count = 0;
1049         int cnt, loopcnt;
1050         unsigned int midlayer_id = 0;
1051         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1052         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1053
1054         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1055         if (lpfc_cmd == NULL)
1056                 goto out;
1057
1058         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1059         lpfc_cmd->timeout = 60;
1060         lpfc_cmd->pCmd = cmnd;
1061         lpfc_cmd->scsi_hba = phba;
1062
1063         /*
1064          * Since the driver manages a single bus device, reset all
1065          * targets known to the driver.  Should any target reset
1066          * fail, this routine returns failure to the midlayer.
1067          */
1068         midlayer_id = cmnd->device->id;
1069         for (i = 0; i < MAX_FCP_TARGET; i++) {
1070                 /* Search the mapped list for this target ID */
1071                 match = 0;
1072                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1073                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1074                                 match = 1;
1075                                 break;
1076                         }
1077                 }
1078                 if (!match)
1079                         continue;
1080
1081                 lpfc_cmd->pCmd->device->id = i;
1082                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1083                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1084                 if (ret != SUCCESS) {
1085                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1086                                 "%d:0713 Bus Reset on target %d failed\n",
1087                                 phba->brd_no, i);
1088                         err_count++;
1089                 }
1090         }
1091
1092         cmnd->device->id = midlayer_id;
1093         loopcnt = 0;
1094         while((cnt = lpfc_sli_sum_iocb(phba,
1095                                 &phba->sli.ring[phba->sli.fcp_ring],
1096                                 0, 0, LPFC_CTX_HOST))) {
1097                 spin_unlock_irq(phba->host->host_lock);
1098                 set_current_state(TASK_UNINTERRUPTIBLE);
1099                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1100                 spin_lock_irq(phba->host->host_lock);
1101
1102                 if (++loopcnt
1103                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1104                         break;
1105         }
1106
1107         if (cnt) {
1108                 /* flush all outstanding commands on the host */
1109                 i = lpfc_sli_abort_iocb(phba,
1110                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1111                                 LPFC_CTX_HOST);
1112
1113                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1114                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1115                    phba->brd_no, cnt, i);
1116         }
1117
1118         if (!err_count)
1119                 ret = SUCCESS;
1120
1121         lpfc_free_scsi_buf(lpfc_cmd);
1122         lpfc_printf_log(phba,
1123                         KERN_ERR,
1124                         LOG_FCP,
1125                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1126                         phba->brd_no, ret);
1127 out:
1128         return ret;
1129 }
1130
1131 static int
1132 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1133 {
1134         int rc;
1135         spin_lock_irq(cmnd->device->host->host_lock);
1136         rc = __lpfc_reset_bus_handler(cmnd);
1137         spin_unlock_irq(cmnd->device->host->host_lock);
1138         return rc;
1139 }
1140
1141 static int
1142 lpfc_slave_alloc(struct scsi_device *sdev)
1143 {
1144         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1145         struct lpfc_scsi_buf *scsi_buf = NULL;
1146         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1147         uint32_t total = 0, i;
1148         uint32_t num_to_alloc = 0;
1149         unsigned long flags;
1150
1151         if (!rport || fc_remote_port_chkready(rport))
1152                 return -ENXIO;
1153
1154         sdev->hostdata = rport->dd_data;
1155
1156         /*
1157          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1158          * available list of scsi buffers.  Don't allocate more than the
1159          * HBA limit conveyed to the midlayer via the host structure.  Note
1160          * that this list of scsi bufs exists for the lifetime of the driver.
1161          */
1162         total = phba->total_scsi_bufs;
1163         num_to_alloc = LPFC_CMD_PER_LUN;
1164         if (total >= phba->cfg_hba_queue_depth) {
1165                 printk(KERN_WARNING "%s, At config limitation of "
1166                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1167                 return 0;
1168         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1169                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1170         }
1171
1172         for (i = 0; i < num_to_alloc; i++) {
1173                 scsi_buf = lpfc_get_scsi_buf(phba);
1174                 if (!scsi_buf) {
1175                         printk(KERN_ERR "%s, failed to allocate "
1176                                "scsi_buf\n", __FUNCTION__);
1177                         break;
1178                 }
1179
1180                 spin_lock_irqsave(phba->host->host_lock, flags);
1181                 phba->total_scsi_bufs++;
1182                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1183                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1184         }
1185         return 0;
1186 }
1187
1188 static int
1189 lpfc_slave_configure(struct scsi_device *sdev)
1190 {
1191         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1192         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1193
1194         if (sdev->tagged_supported)
1195                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1196         else
1197                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1198
1199         /*
1200          * Initialize the fc transport attributes for the target
1201          * containing this scsi device.  Also note that the driver's
1202          * target pointer is stored in the starget_data for the
1203          * driver's sysfs entry point functions.
1204          */
1205         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1206
1207         return 0;
1208 }
1209
1210 static void
1211 lpfc_slave_destroy(struct scsi_device *sdev)
1212 {
1213         sdev->hostdata = NULL;
1214         return;
1215 }
1216
1217 struct scsi_host_template lpfc_template = {
1218         .module                 = THIS_MODULE,
1219         .name                   = LPFC_DRIVER_NAME,
1220         .info                   = lpfc_info,
1221         .queuecommand           = lpfc_queuecommand,
1222         .eh_abort_handler       = lpfc_abort_handler,
1223         .eh_device_reset_handler= lpfc_reset_lun_handler,
1224         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1225         .slave_alloc            = lpfc_slave_alloc,
1226         .slave_configure        = lpfc_slave_configure,
1227         .slave_destroy          = lpfc_slave_destroy,
1228         .this_id                = -1,
1229         .sg_tablesize           = LPFC_SG_SEG_CNT,
1230         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1231         .use_clustering         = ENABLE_CLUSTERING,
1232         .shost_attrs            = lpfc_host_attrs,
1233         .max_sectors            = 0xFFFF,
1234 };