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 static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
  44 {
  45         fcmd->fcpLunLsl = 0;
  46         fcmd->fcpLunMsl = swab16((uint16_t)lun);
  47 }
  48
  49 /*
  50  * This routine allocates a scsi buffer, which contains all the necessary
  51  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  52  * contains information to build the IOCB.  The DMAable region contains
  53  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  54  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  55  * and the BPL BDE is setup in the IOCB.
  56  */
  57 static struct lpfc_scsi_buf *
  58 lpfc_get_scsi_buf(struct lpfc_hba * phba)
  59 {
  60         struct lpfc_scsi_buf *psb;
  61         struct ulp_bde64 *bpl;
  62         IOCB_t *iocb;
  63         dma_addr_t pdma_phys;
  64
  65         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  66         if (!psb)
  67                 return NULL;
  68         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  69         psb->scsi_hba = phba;
  70
  71         /*
  72          * Get memory from the pci pool to map the virt space to pci bus space
  73          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  74          * struct fcp_rsp and the number of bde's necessary to support the
  75          * sg_tablesize.
  76          */
  77         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  78                                                         &psb->dma_handle);
  79         if (!psb->data) {
  80                 kfree(psb);
  81                 return NULL;
  82         }
  83
  84         /* Initialize virtual ptrs to dma_buf region. */
  85         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  86
  87         psb->fcp_cmnd = psb->data;
  88         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  89         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  90                                                         sizeof(struct fcp_rsp);
  91
  92         /* Initialize local short-hand pointers. */
  93         bpl = psb->fcp_bpl;
  94         pdma_phys = psb->dma_handle;
  95
  96         /*
  97          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
  98          * list bdes.  Initialize the first two and leave the rest for
  99          * queuecommand.
 100          */
 101         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 102         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 103         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 104         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 105         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 106         bpl++;
 107
 108         /* Setup the physical region for the FCP RSP */
 109         pdma_phys += sizeof (struct fcp_cmnd);
 110         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 111         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 112         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 113         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 114         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 115
 116         /*
 117          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 118          * initialize it with all known data now.
 119          */
 120         pdma_phys += (sizeof (struct fcp_rsp));
 121         iocb = &psb->cur_iocbq.iocb;
 122         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 123         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 124         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 125         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 126         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 127         iocb->ulpBdeCount = 1;
 128         iocb->ulpClass = CLASS3;
 129
 130         return psb;
 131 }
 132
 133 static void
 134 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
 135 {
 136         struct lpfc_hba *phba = psb->scsi_hba;
 137
 138         /*
 139          * There are only two special cases to consider.  (1) the scsi command
 140          * requested scatter-gather usage or (2) the scsi command allocated
 141          * a request buffer, but did not request use_sg.  There is a third
 142          * case, but it does not require resource deallocation.
 143          */
 144         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 145                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 146                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 147         } else {
 148                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 149                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 150                                                 psb->pCmd->request_bufflen,
 151                                                 psb->pCmd->sc_data_direction);
 152                  }
 153         }
 154
 155         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 156 }
 157
 158 static int
 159 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 160 {
 161         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 162         struct scatterlist *sgel = NULL;
 163         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 164         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 165         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 166         dma_addr_t physaddr;
 167         uint32_t i, num_bde = 0;
 168         int datadir = scsi_cmnd->sc_data_direction;
 169         int dma_error;
 170
 171         /*
 172          * There are three possibilities here - use scatter-gather segment, use
 173          * the single mapping, or neither.  Start the lpfc command prep by
 174          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 175          * data bde entry.
 176          */
 177         bpl += 2;
 178         if (scsi_cmnd->use_sg) {
 179                 /*
 180                  * The driver stores the segment count returned from pci_map_sg
 181                  * because this a count of dma-mappings used to map the use_sg
 182                  * pages.  They are not guaranteed to be the same for those
 183                  * architectures that implement an IOMMU.
 184                  */
 185                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 186                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 187                                                 scsi_cmnd->use_sg, datadir);
 188                 if (lpfc_cmd->seg_cnt == 0)
 189                         return 1;
 190
 191                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 192                         printk(KERN_ERR "%s: Too many sg segments from "
 193                                "dma_map_sg.  Config %d, seg_cnt %d",
 194                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 195                                lpfc_cmd->seg_cnt);
 196                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 197                                      lpfc_cmd->seg_cnt, datadir);
 198                         return 1;
 199                 }
 200
 201                 /*
 202                  * The driver established a maximum scatter-gather segment count
 203                  * during probe that limits the number of sg elements in any
 204                  * single scsi command.  Just run through the seg_cnt and format
 205                  * the bde's.
 206                  */
 207                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 208                         physaddr = sg_dma_address(sgel);
 209                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 210                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 211                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 212                         if (datadir == DMA_TO_DEVICE)
 213                                 bpl->tus.f.bdeFlags = 0;
 214                         else
 215                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 216                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 217                         bpl++;
 218                         sgel++;
 219                         num_bde++;
 220                 }
 221         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 222                 physaddr = dma_map_single(&phba->pcidev->dev,
 223                                           scsi_cmnd->request_buffer,
 224                                           scsi_cmnd->request_bufflen,
 225                                           datadir);
 226                 dma_error = dma_mapping_error(physaddr);
 227                 if (dma_error) {
 228                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 229                                 "%d:0718 Unable to dma_map_single "
 230                                 "request_buffer: x%x\n",
 231                                 phba->brd_no, dma_error);
 232                         return 1;
 233                 }
 234
 235                 lpfc_cmd->nonsg_phys = physaddr;
 236                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 237                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 238                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 239                 if (datadir == DMA_TO_DEVICE)
 240                         bpl->tus.f.bdeFlags = 0;
 241                 else
 242                         bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 243                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 244                 num_bde = 1;
 245                 bpl++;
 246         }
 247
 248         /*
 249          * Finish initializing those IOCB fields that are dependent on the
 250          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 251          * reinitialized since all iocb memory resources are used many times
 252          * for transmit, receive, and continuation bpl's.
 253          */
 254         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 255         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 256                 (num_bde * sizeof (struct ulp_bde64));
 257         iocb_cmd->ulpBdeCount = 1;
 258         iocb_cmd->ulpLe = 1;
 259         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 260         return 0;
 261 }
 262
 263 static void
 264 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 265 {
 266         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 267         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 268         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 269         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 270         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 271         uint32_t resp_info = fcprsp->rspStatus2;
 272         uint32_t scsi_status = fcprsp->rspStatus3;
 273         uint32_t host_status = DID_OK;
 274         uint32_t rsplen = 0;
 275
 276         /*
 277          *  If this is a task management command, there is no
 278          *  scsi packet associated with this lpfc_cmd.  The driver
 279          *  consumes it.
 280          */
 281         if (fcpcmd->fcpCntl2) {
 282                 scsi_status = 0;
 283                 goto out;
 284         }
 285
 286         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 287                         "%d:0730 FCP command failed: RSP "
 288                         "Data: x%x x%x x%x x%x x%x x%x\n",
 289                         phba->brd_no, resp_info, scsi_status,
 290                         be32_to_cpu(fcprsp->rspResId),
 291                         be32_to_cpu(fcprsp->rspSnsLen),
 292                         be32_to_cpu(fcprsp->rspRspLen),
 293                         fcprsp->rspInfo3);
 294
 295         if (resp_info & RSP_LEN_VALID) {
 296                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 297                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 298                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 299                         host_status = DID_ERROR;
 300                         goto out;
 301                 }
 302         }
 303
 304         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 305                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 306                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 307                         snslen = SCSI_SENSE_BUFFERSIZE;
 308
 309                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 310         }
 311
 312         cmnd->resid = 0;
 313         if (resp_info & RESID_UNDER) {
 314                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 315
 316                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 317                                 "%d:0716 FCP Read Underrun, expected %d, "
 318                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 319                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 320                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 321
 322                 /*
 323                  * The cmnd->underflow is the minimum number of bytes that must
 324                  * be transfered for this command.  Provided a sense condition
 325                  * is not present, make sure the actual amount transferred is at
 326                  * least the underflow value or fail.
 327                  */
 328                 if (!(resp_info & SNS_LEN_VALID) &&
 329                     (scsi_status == SAM_STAT_GOOD) &&
 330                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 331                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 332                                         "%d:0717 FCP command x%x residual "
 333                                         "underrun converted to error "
 334                                         "Data: x%x x%x x%x\n", phba->brd_no,
 335                                         cmnd->cmnd[0], cmnd->request_bufflen,
 336                                         cmnd->resid, cmnd->underflow);
 337
 338                         host_status = DID_ERROR;
 339                 }
 340         } else if (resp_info & RESID_OVER) {
 341                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 342                                 "%d:0720 FCP command x%x residual "
 343                                 "overrun error. Data: x%x x%x \n",
 344                                 phba->brd_no, cmnd->cmnd[0],
 345                                 cmnd->request_bufflen, cmnd->resid);
 346                 host_status = DID_ERROR;
 347
 348         /*
 349          * Check SLI validation that all the transfer was actually done
 350          * (fcpi_parm should be zero). Apply check only to reads.
 351          */
 352         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 353                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 354                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 355                         "%d:0734 FCP Read Check Error Data: "
 356                         "x%x x%x x%x x%x\n", phba->brd_no,
 357                         be32_to_cpu(fcpcmd->fcpDl),
 358                         be32_to_cpu(fcprsp->rspResId),
 359                         fcpi_parm, cmnd->cmnd[0]);
 360                 host_status = DID_ERROR;
 361                 cmnd->resid = cmnd->request_bufflen;
 362         }
 363
 364  out:
 365         cmnd->result = ScsiResult(host_status, scsi_status);
 366 }
 367
 368 static void
 369 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 370                         struct lpfc_iocbq *pIocbOut)
 371 {
 372         struct lpfc_scsi_buf *lpfc_cmd =
 373                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 374         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 375         struct lpfc_nodelist *pnode = rdata->pnode;
 376         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 377         unsigned long iflag;
 378
 379         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 380         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 381
 382         if (lpfc_cmd->status) {
 383                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 384                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 385                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 386                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 387                         lpfc_cmd->status = IOSTAT_DEFAULT;
 388
 389                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 390                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 391                                 "x%x result: x%x Data: x%x x%x\n",
 392                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 393                                 cmd->device->lun, lpfc_cmd->status,
 394                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 395                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 396
 397                 switch (lpfc_cmd->status) {
 398                 case IOSTAT_FCP_RSP_ERROR:
 399                         /* Call FCP RSP handler to determine result */
 400                         lpfc_handle_fcp_err(lpfc_cmd);
 401                         break;
 402                 case IOSTAT_NPORT_BSY:
 403                 case IOSTAT_FABRIC_BSY:
 404                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 405                         break;
 406                 default:
 407                         cmd->result = ScsiResult(DID_ERROR, 0);
 408                         break;
 409                 }
 410
 411                 if (pnode) {
 412                         if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
 413                                 cmd->result = ScsiResult(DID_BUS_BUSY,
 414                                         SAM_STAT_BUSY);
 415                 }
 416                 else {
 417                         cmd->result = ScsiResult(DID_NO_CONNECT, 0);
 418                 }
 419         } else {
 420                 cmd->result = ScsiResult(DID_OK, 0);
 421         }
 422
 423         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 424                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 425
 426                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 427                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 428                                 "SNS x%x x%x Data: x%x x%x\n",
 429                                 phba->brd_no, cmd->device->id,
 430                                 cmd->device->lun, cmd, cmd->result,
 431                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 432         }
 433
 434         spin_lock_irqsave(phba->host->host_lock, iflag);
 435         lpfc_free_scsi_buf(lpfc_cmd);
 436         cmd->host_scribble = NULL;
 437         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 438
 439         cmd->scsi_done(cmd);
 440 }
 441
 442 static void
 443 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 444                         struct lpfc_nodelist *pnode)
 445 {
 446         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 447         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 448         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 449         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 450         int datadir = scsi_cmnd->sc_data_direction;
 451
 452         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 453         /* clear task management bits */
 454         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 455
 456         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 457
 458         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 459
 460         if (scsi_cmnd->device->tagged_supported) {
 461                 switch (scsi_cmnd->tag) {
 462                 case HEAD_OF_QUEUE_TAG:
 463                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 464                         break;
 465                 case ORDERED_QUEUE_TAG:
 466                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 467                         break;
 468                 default:
 469                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 470                         break;
 471                 }
 472         } else
 473                 fcp_cmnd->fcpCntl1 = 0;
 474
 475         /*
 476          * There are three possibilities here - use scatter-gather segment, use
 477          * the single mapping, or neither.  Start the lpfc command prep by
 478          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 479          * data bde entry.
 480          */
 481         if (scsi_cmnd->use_sg) {
 482                 if (datadir == DMA_TO_DEVICE) {
 483                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 484                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 485                         iocb_cmd->ulpPU = 0;
 486                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 487                         phba->fc4OutputRequests++;
 488                 } else {
 489                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 490                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 491                         iocb_cmd->un.fcpi.fcpi_parm =
 492                                 scsi_cmnd->request_bufflen;
 493                         fcp_cmnd->fcpCntl3 = READ_DATA;
 494                         phba->fc4InputRequests++;
 495                 }
 496         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 497                 if (datadir == DMA_TO_DEVICE) {
 498                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 499                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 500                         iocb_cmd->ulpPU = 0;
 501                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 502                         phba->fc4OutputRequests++;
 503                 } else {
 504                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 505                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 506                         iocb_cmd->un.fcpi.fcpi_parm =
 507                                 scsi_cmnd->request_bufflen;
 508                         fcp_cmnd->fcpCntl3 = READ_DATA;
 509                         phba->fc4InputRequests++;
 510                 }
 511         } else {
 512                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 513                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 514                 iocb_cmd->ulpPU = 0;
 515                 fcp_cmnd->fcpCntl3 = 0;
 516                 phba->fc4ControlRequests++;
 517         }
 518
 519         /*
 520          * Finish initializing those IOCB fields that are independent
 521          * of the scsi_cmnd request_buffer
 522          */
 523         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 524         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 525                 piocbq->iocb.ulpFCP2Rcvy = 1;
 526
 527         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 528         piocbq->context1  = lpfc_cmd;
 529         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 530         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 531 }
 532
 533 static int
 534 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 535                              struct lpfc_scsi_buf *lpfc_cmd,
 536                              uint8_t task_mgmt_cmd)
 537 {
 538         struct lpfc_sli *psli;
 539         struct lpfc_iocbq *piocbq;
 540         IOCB_t *piocb;
 541         struct fcp_cmnd *fcp_cmnd;
 542         struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
 543         struct lpfc_rport_data *rdata = scsi_dev->hostdata;
 544         struct lpfc_nodelist *ndlp = rdata->pnode;
 545
 546         if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 547                 return 0;
 548         }
 549
 550         psli = &phba->sli;
 551         piocbq = &(lpfc_cmd->cur_iocbq);
 552         piocb = &piocbq->iocb;
 553
 554         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 555         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 556         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 557
 558         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 559
 560         piocb->ulpContext = ndlp->nlp_rpi;
 561         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 562                 piocb->ulpFCP2Rcvy = 1;
 563         }
 564         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 565
 566         /* ulpTimeout is only one byte */
 567         if (lpfc_cmd->timeout > 0xff) {
 568                 /*
 569                  * Do not timeout the command at the firmware level.
 570                  * The driver will provide the timeout mechanism.
 571                  */
 572                 piocb->ulpTimeout = 0;
 573         } else {
 574                 piocb->ulpTimeout = lpfc_cmd->timeout;
 575         }
 576
 577         lpfc_cmd->rdata = rdata;
 578
 579         switch (task_mgmt_cmd) {
 580         case FCP_LUN_RESET:
 581                 /* Issue LUN Reset to TGT <num> LUN <num> */
 582                 lpfc_printf_log(phba,
 583                                 KERN_INFO,
 584                                 LOG_FCP,
 585                                 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
 586                                 "Data: x%x x%x\n",
 587                                 phba->brd_no,
 588                                 scsi_dev->id, scsi_dev->lun,
 589                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 590
 591                 break;
 592         case FCP_ABORT_TASK_SET:
 593                 /* Issue Abort Task Set to TGT <num> LUN <num> */
 594                 lpfc_printf_log(phba,
 595                                 KERN_INFO,
 596                                 LOG_FCP,
 597                                 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
 598                                 "Data: x%x x%x\n",
 599                                 phba->brd_no,
 600                                 scsi_dev->id, scsi_dev->lun,
 601                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 602
 603                 break;
 604         case FCP_TARGET_RESET:
 605                 /* Issue Target Reset to TGT <num> */
 606                 lpfc_printf_log(phba,
 607                                 KERN_INFO,
 608                                 LOG_FCP,
 609                                 "%d:0702 Issue Target Reset to TGT %d "
 610                                 "Data: x%x x%x\n",
 611                                 phba->brd_no,
 612                                 scsi_dev->id, ndlp->nlp_rpi,
 613                                 ndlp->nlp_flag);
 614                 break;
 615         }
 616
 617         return (1);
 618 }
 619
 620 static int
 621 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
 622 {
 623         struct lpfc_iocbq *iocbq;
 624         struct lpfc_iocbq *iocbqrsp = NULL;
 625         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 626         int ret;
 627
 628         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
 629         if (!ret)
 630                 return FAILED;
 631
 632         lpfc_cmd->scsi_hba = phba;
 633         iocbq = &lpfc_cmd->cur_iocbq;
 634         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 635         if (!iocbqrsp)
 636                 return FAILED;
 637         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 638
 639         iocbq->iocb_flag |= LPFC_IO_POLL;
 640         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 641                      &phba->sli.ring[phba->sli.fcp_ring],
 642                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 643                      iocbqrsp,
 644                      lpfc_cmd->timeout);
 645         if (ret != IOCB_SUCCESS) {
 646                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 647                 ret = FAILED;
 648         } else {
 649                 ret = SUCCESS;
 650                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 651                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 652                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 653                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 654                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 655         }
 656
 657         /*
 658          * All outstanding txcmplq I/Os should have been aborted by the target.
 659          * Unfortunately, some targets do not abide by this forcing the driver
 660          * to double check.
 661          */
 662         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 663                             lpfc_cmd->pCmd->device->id,
 664                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 665
 666         /* Return response IOCB to free list. */
 667         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
 668         return ret;
 669 }
 670
 671 static void
 672 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 673                             struct lpfc_iocbq *pIocbOut)
 674 {
 675         unsigned long iflag;
 676         struct lpfc_scsi_buf *lpfc_cmd =
 677                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 678
 679         spin_lock_irqsave(phba->host->host_lock, iflag);
 680         lpfc_free_scsi_buf(lpfc_cmd);
 681         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 682 }
 683
 684 static void
 685 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 686                                 struct lpfc_iocbq *pIocbIn,
 687                                 struct lpfc_iocbq *pIocbOut)
 688 {
 689         struct scsi_cmnd *ml_cmd =
 690                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 691
 692         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 693         ml_cmd->host_scribble = NULL;
 694 }
 695
 696 const char *
 697 lpfc_info(struct Scsi_Host *host)
 698 {
 699         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 700         int len;
 701         static char  lpfcinfobuf[384];
 702
 703         memset(lpfcinfobuf,0,384);
 704         if (phba && phba->pcidev){
 705                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 706                 len = strlen(lpfcinfobuf);
 707                 snprintf(lpfcinfobuf + len,
 708                         384-len,
 709                         " on PCI bus %02x device %02x irq %d",
 710                         phba->pcidev->bus->number,
 711                         phba->pcidev->devfn,
 712                         phba->pcidev->irq);
 713                 len = strlen(lpfcinfobuf);
 714                 if (phba->Port[0]) {
 715                         snprintf(lpfcinfobuf + len,
 716                                  384-len,
 717                                  " port %s",
 718                                  phba->Port);
 719                 }
 720         }
 721         return lpfcinfobuf;
 722 }
 723
 724 static int
 725 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 726 {
 727         struct lpfc_hba *phba =
 728                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 729         struct lpfc_sli *psli = &phba->sli;
 730         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 731         struct lpfc_nodelist *ndlp = rdata->pnode;
 732         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 733         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 734         int err = 0;
 735
 736         /*
 737          * The target pointer is guaranteed not to be NULL because the driver
 738          * only clears the device->hostdata field in lpfc_slave_destroy.  This
 739          * approach guarantees no further IO calls on this target.
 740          */
 741         if (!ndlp) {
 742                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 743                 goto out_fail_command;
 744         }
 745
 746         /*
 747          * A Fibre Channel target is present and functioning only when the node
 748          * state is MAPPED.  Any other state is a failure.
 749          */
 750         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
 751                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
 752                     (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
 753                         cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 754                         goto out_fail_command;
 755                 }
 756                 /*
 757                  * The device is most likely recovered and the driver
 758                  * needs a bit more time to finish.  Ask the midlayer
 759                  * to retry.
 760                  */
 761                 goto out_host_busy;
 762         }
 763
 764         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 765         if (lpfc_cmd == NULL) {
 766                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 767                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 768                 goto out_host_busy;
 769         }
 770
 771         /*
 772          * Store the midlayer's command structure for the completion phase
 773          * and complete the command initialization.
 774          */
 775         lpfc_cmd->pCmd  = cmnd;
 776         lpfc_cmd->rdata = rdata;
 777         lpfc_cmd->timeout = 0;
 778         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 779         cmnd->scsi_done = done;
 780
 781         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 782         if (err)
 783                 goto out_host_busy_free_buf;
 784
 785         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 786
 787         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 788                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 789         if (err)
 790                 goto out_host_busy_free_buf;
 791         return 0;
 792
 793  out_host_busy_free_buf:
 794         lpfc_free_scsi_buf(lpfc_cmd);
 795         cmnd->host_scribble = NULL;
 796  out_host_busy:
 797         return SCSI_MLQUEUE_HOST_BUSY;
 798
 799  out_fail_command:
 800         done(cmnd);
 801         return 0;
 802 }
 803
 804 static int
 805 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 806 {
 807         struct lpfc_hba *phba =
 808                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 809         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 810         struct lpfc_iocbq *iocb, *next_iocb;
 811         struct lpfc_iocbq *abtsiocb = NULL;
 812         struct lpfc_scsi_buf *lpfc_cmd;
 813         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 814         IOCB_t *cmd, *icmd;
 815         unsigned long snum;
 816         unsigned int id, lun;
 817         unsigned int loop_count = 0;
 818         int ret = IOCB_SUCCESS;
 819
 820         /*
 821          * If the host_scribble data area is NULL, then the driver has already
 822          * completed this command, but the midlayer did not see the completion
 823          * before the eh fired.  Just return SUCCESS.
 824          */
 825         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 826         if (!lpfc_cmd)
 827                 return SUCCESS;
 828
 829         /* save these now since lpfc_cmd can be freed */
 830         id   = lpfc_cmd->pCmd->device->id;
 831         lun  = lpfc_cmd->pCmd->device->lun;
 832         snum = lpfc_cmd->pCmd->serial_number;
 833
 834         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 835                 cmd = &iocb->iocb;
 836                 if (iocb->context1 != lpfc_cmd)
 837                         continue;
 838
 839                 list_del_init(&iocb->list);
 840                 pring->txq_cnt--;
 841                 if (!iocb->iocb_cmpl) {
 842                         list_add_tail(&iocb->list, lpfc_iocb_list);
 843                 }
 844                 else {
 845                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 846                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 847                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 848                 }
 849
 850                 goto out;
 851         }
 852
 853         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 854         if (abtsiocb == NULL)
 855                 return FAILED;
 856
 857         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 858
 859         /*
 860          * The scsi command was not in the txq.  Check the txcmplq and if it is
 861          * found, send an abort to the FW.
 862          */
 863         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 864                 if (iocb->context1 != lpfc_cmd)
 865                         continue;
 866
 867                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 868                 cmd = &iocb->iocb;
 869                 icmd = &abtsiocb->iocb;
 870                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 871                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 872                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 873
 874                 icmd->ulpLe = 1;
 875                 icmd->ulpClass = cmd->ulpClass;
 876                 if (phba->hba_state >= LPFC_LINK_UP)
 877                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 878                 else
 879                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 880
 881                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 882                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 883                                                                 IOCB_ERROR) {
 884                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 885                         ret = IOCB_ERROR;
 886                         break;
 887                 }
 888
 889                 /* Wait for abort to complete */
 890                 while (cmnd->host_scribble)
 891                 {
 892                         spin_unlock_irq(phba->host->host_lock);
 893                         set_current_state(TASK_UNINTERRUPTIBLE);
 894                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 895                         spin_lock_irq(phba->host->host_lock);
 896                         if (++loop_count
 897                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 898                                 break;
 899                 }
 900
 901                 if(cmnd->host_scribble) {
 902                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 903                                         "%d:0748 abort handler timed "
 904                                         "out waiting for abort to "
 905                                         "complete. Data: "
 906                                         "x%x x%x x%x x%lx\n",
 907                                         phba->brd_no, ret, id, lun, snum);
 908                         cmnd->host_scribble = NULL;
 909                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 910                         ret = IOCB_ERROR;
 911                 }
 912
 913                 break;
 914         }
 915
 916  out:
 917         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 918                         "%d:0749 SCSI layer issued abort device "
 919                         "Data: x%x x%x x%x x%lx\n",
 920                         phba->brd_no, ret, id, lun, snum);
 921
 922         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 923 }
 924
 925 static int
 926 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 927 {
 928         int rc;
 929         spin_lock_irq(cmnd->device->host->host_lock);
 930         rc = __lpfc_abort_handler(cmnd);
 931         spin_unlock_irq(cmnd->device->host->host_lock);
 932         return rc;
 933 }
 934
 935 static int
 936 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 937 {
 938         struct Scsi_Host *shost = cmnd->device->host;
 939         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 940         struct lpfc_sli *psli = &phba->sli;
 941         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 942         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 943         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 944         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 945         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 946         struct lpfc_nodelist *pnode = rdata->pnode;
 947         int ret = FAILED;
 948         int cnt, loopcnt;
 949
 950         /*
 951          * If target is not in a MAPPED state, delay the reset until
 952          * target is rediscovered or nodev timeout expires.
 953          */
 954         while ( 1 ) {
 955                 if (!pnode)
 956                         break;
 957
 958                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 959                         spin_unlock_irq(phba->host->host_lock);
 960                         set_current_state(TASK_UNINTERRUPTIBLE);
 961                         schedule_timeout( HZ/2);
 962                         spin_lock_irq(phba->host->host_lock);
 963                 }
 964                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 965                         break;
 966         }
 967
 968         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 969         if (lpfc_cmd == NULL)
 970                 goto out;
 971
 972         lpfc_cmd->pCmd = cmnd;
 973         lpfc_cmd->timeout = 60;
 974         lpfc_cmd->scsi_hba = phba;
 975
 976         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 977         if (!ret)
 978                 goto out_free_scsi_buf;
 979
 980         iocbq = &lpfc_cmd->cur_iocbq;
 981
 982         /* get a buffer for this IOCB command response */
 983         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 984         if (iocbqrsp == NULL)
 985                 goto out_free_scsi_buf;
 986
 987         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 988
 989         iocbq->iocb_flag |= LPFC_IO_POLL;
 990         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 991
 992         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 993                      &phba->sli.ring[psli->fcp_ring],
 994                      iocbq, 0, iocbqrsp, 60);
 995         if (ret == IOCB_SUCCESS)
 996                 ret = SUCCESS;
 997
 998         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 999         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1000         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
1001                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
1002                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1003
1004         /*
1005          * All outstanding txcmplq I/Os should have been aborted by the target.
1006          * Unfortunately, some targets do not abide by this forcing the driver
1007          * to double check.
1008          */
1009         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1010                             cmnd->device->id, cmnd->device->lun, 0,
1011                             LPFC_CTX_LUN);
1012
1013         loopcnt = 0;
1014         while((cnt = lpfc_sli_sum_iocb(phba,
1015                                        &phba->sli.ring[phba->sli.fcp_ring],
1016                                        cmnd->device->id, cmnd->device->lun,
1017                                        LPFC_CTX_LUN))) {
1018                 spin_unlock_irq(phba->host->host_lock);
1019                 set_current_state(TASK_UNINTERRUPTIBLE);
1020                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1021                 spin_lock_irq(phba->host->host_lock);
1022
1023                 if (++loopcnt
1024                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1025                         break;
1026         }
1027
1028         if (cnt) {
1029                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1030                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1031                         phba->brd_no, cnt);
1032         }
1033
1034         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1035
1036 out_free_scsi_buf:
1037         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1038                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1039                         "Data: x%x x%x x%x\n",
1040                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1041                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1042                         lpfc_cmd->result);
1043         lpfc_free_scsi_buf(lpfc_cmd);
1044 out:
1045         return ret;
1046 }
1047
1048 static int
1049 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1050 {
1051         int rc;
1052         spin_lock_irq(cmnd->device->host->host_lock);
1053         rc = __lpfc_reset_lun_handler(cmnd);
1054         spin_unlock_irq(cmnd->device->host->host_lock);
1055         return rc;
1056 }
1057
1058 /*
1059  * Note: midlayer calls this function with the host_lock held
1060  */
1061 static int
1062 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1063 {
1064         struct Scsi_Host *shost = cmnd->device->host;
1065         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1066         struct lpfc_nodelist *ndlp = NULL;
1067         int match;
1068         int ret = FAILED, i, err_count = 0;
1069         int cnt, loopcnt;
1070         unsigned int midlayer_id = 0;
1071         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1072         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1073
1074         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1075         if (lpfc_cmd == NULL)
1076                 goto out;
1077
1078         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1079         lpfc_cmd->timeout = 60;
1080         lpfc_cmd->pCmd = cmnd;
1081         lpfc_cmd->scsi_hba = phba;
1082
1083         /*
1084          * Since the driver manages a single bus device, reset all
1085          * targets known to the driver.  Should any target reset
1086          * fail, this routine returns failure to the midlayer.
1087          */
1088         midlayer_id = cmnd->device->id;
1089         for (i = 0; i < MAX_FCP_TARGET; i++) {
1090                 /* Search the mapped list for this target ID */
1091                 match = 0;
1092                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1093                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1094                                 match = 1;
1095                                 break;
1096                         }
1097                 }
1098                 if (!match)
1099                         continue;
1100
1101                 lpfc_cmd->pCmd->device->id = i;
1102                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1103                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1104                 if (ret != SUCCESS) {
1105                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1106                                 "%d:0713 Bus Reset on target %d failed\n",
1107                                 phba->brd_no, i);
1108                         err_count++;
1109                 }
1110         }
1111
1112         cmnd->device->id = midlayer_id;
1113         loopcnt = 0;
1114         while((cnt = lpfc_sli_sum_iocb(phba,
1115                                 &phba->sli.ring[phba->sli.fcp_ring],
1116                                 0, 0, LPFC_CTX_HOST))) {
1117                 spin_unlock_irq(phba->host->host_lock);
1118                 set_current_state(TASK_UNINTERRUPTIBLE);
1119                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1120                 spin_lock_irq(phba->host->host_lock);
1121
1122                 if (++loopcnt
1123                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1124                         break;
1125         }
1126
1127         if (cnt) {
1128                 /* flush all outstanding commands on the host */
1129                 i = lpfc_sli_abort_iocb(phba,
1130                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1131                                 LPFC_CTX_HOST);
1132
1133                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1134                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1135                    phba->brd_no, cnt, i);
1136         }
1137
1138         if (!err_count)
1139                 ret = SUCCESS;
1140
1141         lpfc_free_scsi_buf(lpfc_cmd);
1142         lpfc_printf_log(phba,
1143                         KERN_ERR,
1144                         LOG_FCP,
1145                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1146                         phba->brd_no, ret);
1147 out:
1148         return ret;
1149 }
1150
1151 static int
1152 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1153 {
1154         int rc;
1155         spin_lock_irq(cmnd->device->host->host_lock);
1156         rc = __lpfc_reset_bus_handler(cmnd);
1157         spin_unlock_irq(cmnd->device->host->host_lock);
1158         return rc;
1159 }
1160
1161 static int
1162 lpfc_slave_alloc(struct scsi_device *sdev)
1163 {
1164         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1165         struct lpfc_nodelist *ndlp = NULL;
1166         int match = 0;
1167         struct lpfc_scsi_buf *scsi_buf = NULL;
1168         uint32_t total = 0, i;
1169         uint32_t num_to_alloc = 0;
1170         unsigned long flags;
1171         struct list_head *listp;
1172         struct list_head *node_list[6];
1173
1174         /*
1175          * Store the target pointer in the scsi_device hostdata pointer provided
1176          * the driver has already discovered the target id.
1177          */
1178
1179         /* Search the nlp lists other than unmap_list for this target ID */
1180         node_list[0] = &phba->fc_npr_list;
1181         node_list[1] = &phba->fc_nlpmap_list;
1182         node_list[2] = &phba->fc_prli_list;
1183         node_list[3] = &phba->fc_reglogin_list;
1184         node_list[4] = &phba->fc_adisc_list;
1185         node_list[5] = &phba->fc_plogi_list;
1186
1187         for (i = 0; i < 6 && !match; i++) {
1188                 listp = node_list[i];
1189                 if (list_empty(listp))
1190                         continue;
1191                 list_for_each_entry(ndlp, listp, nlp_listp) {
1192                         if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1193                                 match = 1;
1194                                 break;
1195                         }
1196                 }
1197         }
1198
1199         if (!match)
1200                 return -ENXIO;
1201
1202         sdev->hostdata = ndlp->rport->dd_data;
1203
1204         /*
1205          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1206          * available list of scsi buffers.  Don't allocate more than the
1207          * HBA limit conveyed to the midlayer via the host structure.  Note
1208          * that this list of scsi bufs exists for the lifetime of the driver.
1209          */
1210         total = phba->total_scsi_bufs;
1211         num_to_alloc = LPFC_CMD_PER_LUN;
1212         if (total >= phba->cfg_hba_queue_depth) {
1213                 printk(KERN_WARNING "%s, At config limitation of "
1214                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1215                 return 0;
1216         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1217                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1218         }
1219
1220         for (i = 0; i < num_to_alloc; i++) {
1221                 scsi_buf = lpfc_get_scsi_buf(phba);
1222                 if (!scsi_buf) {
1223                         printk(KERN_ERR "%s, failed to allocate "
1224                                "scsi_buf\n", __FUNCTION__);
1225                         break;
1226                 }
1227
1228                 spin_lock_irqsave(phba->host->host_lock, flags);
1229                 phba->total_scsi_bufs++;
1230                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1231                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1232         }
1233         return 0;
1234 }
1235
1236 static int
1237 lpfc_slave_configure(struct scsi_device *sdev)
1238 {
1239         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1240         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1241
1242         if (sdev->tagged_supported)
1243                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1244         else
1245                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1246
1247         /*
1248          * Initialize the fc transport attributes for the target
1249          * containing this scsi device.  Also note that the driver's
1250          * target pointer is stored in the starget_data for the
1251          * driver's sysfs entry point functions.
1252          */
1253         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1254
1255         return 0;
1256 }
1257
1258 static void
1259 lpfc_slave_destroy(struct scsi_device *sdev)
1260 {
1261         sdev->hostdata = NULL;
1262         return;
1263 }
1264
1265 struct scsi_host_template lpfc_template = {
1266         .module                 = THIS_MODULE,
1267         .name                   = LPFC_DRIVER_NAME,
1268         .info                   = lpfc_info,
1269         .queuecommand           = lpfc_queuecommand,
1270         .eh_abort_handler       = lpfc_abort_handler,
1271         .eh_device_reset_handler= lpfc_reset_lun_handler,
1272         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1273         .slave_alloc            = lpfc_slave_alloc,
1274         .slave_configure        = lpfc_slave_configure,
1275         .slave_destroy          = lpfc_slave_destroy,
1276         .this_id                = -1,
1277         .sg_tablesize           = LPFC_SG_SEG_CNT,
1278         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1279         .use_clustering         = ENABLE_CLUSTERING,
1280         .shost_attrs            = lpfc_host_attrs,
1281         .max_sectors            = 0xFFFF,
1282 };