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   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Enterprise Fibre Channel Host Bus Adapters.                     *
   4  * Refer to the README file included with this package for         *
   5  * driver version and adapter support.                             *
   6  * Copyright (C) 2004 Emulex Corporation.                          *
   7  * www.emulex.com                                                  *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of the GNU General Public License     *
  11  * as published by the Free Software Foundation; either version 2  *
  12  * of the License, or (at your option) any later version.          *
  13  *                                                                 *
  14  * This program is distributed in the hope that it will be useful, *
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
  17  * GNU General Public License for more details, a copy of which    *
  18  * can be found in the file COPYING included with this package.    *
  19  *******************************************************************/
  20
  21 #include <linux/pci.h>
  22 #include <linux/interrupt.h>
  23
  24 #include <scsi/scsi.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_host.h>
  27 #include <scsi/scsi_tcq.h>
  28 #include <scsi/scsi_transport_fc.h>
  29
  30 #include "lpfc_version.h"
  31 #include "lpfc_hw.h"
  32 #include "lpfc_sli.h"
  33 #include "lpfc_disc.h"
  34 #include "lpfc_scsi.h"
  35 #include "lpfc.h"
  36 #include "lpfc_logmsg.h"
  37 #include "lpfc_crtn.h"
  38
  39 #define LPFC_RESET_WAIT  2
  40 #define LPFC_ABORT_WAIT  2
  41
  42 static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
  43 {
  44         fcmd->fcpLunLsl = 0;
  45         fcmd->fcpLunMsl = swab16((uint16_t)lun);
  46 }
  47
  48 /*
  49  * This routine allocates a scsi buffer, which contains all the necessary
  50  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  51  * contains information to build the IOCB.  The DMAable region contains
  52  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  53  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  54  * and the BPL BDE is setup in the IOCB.
  55  */
  56 static struct lpfc_scsi_buf *
  57 lpfc_get_scsi_buf(struct lpfc_hba * phba)
  58 {
  59         struct lpfc_scsi_buf *psb;
  60         struct ulp_bde64 *bpl;
  61         IOCB_t *iocb;
  62         dma_addr_t pdma_phys;
  63
  64         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  65         if (!psb)
  66                 return NULL;
  67         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  68         psb->scsi_hba = phba;
  69
  70         /*
  71          * Get memory from the pci pool to map the virt space to pci bus space
  72          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  73          * struct fcp_rsp and the number of bde's necessary to support the
  74          * sg_tablesize.
  75          */
  76         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  77                                                         &psb->dma_handle);
  78         if (!psb->data) {
  79                 kfree(psb);
  80                 return NULL;
  81         }
  82
  83         /* Initialize virtual ptrs to dma_buf region. */
  84         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  85
  86         psb->fcp_cmnd = psb->data;
  87         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  88         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  89                                                         sizeof(struct fcp_rsp);
  90
  91         /* Initialize local short-hand pointers. */
  92         bpl = psb->fcp_bpl;
  93         pdma_phys = psb->dma_handle;
  94
  95         /*
  96          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
  97          * list bdes.  Initialize the first two and leave the rest for
  98          * queuecommand.
  99          */
 100         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 101         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 102         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 103         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 104         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 105         bpl++;
 106
 107         /* Setup the physical region for the FCP RSP */
 108         pdma_phys += sizeof (struct fcp_cmnd);
 109         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 110         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 111         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 112         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 113         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 114
 115         /*
 116          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 117          * initialize it with all known data now.
 118          */
 119         pdma_phys += (sizeof (struct fcp_rsp));
 120         iocb = &psb->cur_iocbq.iocb;
 121         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 122         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 123         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 124         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 125         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 126         iocb->ulpBdeCount = 1;
 127         iocb->ulpClass = CLASS3;
 128
 129         return psb;
 130 }
 131
 132 static void
 133 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
 134 {
 135         struct lpfc_hba *phba = psb->scsi_hba;
 136
 137         /*
 138          * There are only two special cases to consider.  (1) the scsi command
 139          * requested scatter-gather usage or (2) the scsi command allocated
 140          * a request buffer, but did not request use_sg.  There is a third
 141          * case, but it does not require resource deallocation.
 142          */
 143         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 144                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 145                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 146         } else {
 147                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 148                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 149                                                 psb->pCmd->request_bufflen,
 150                                                 psb->pCmd->sc_data_direction);
 151                  }
 152         }
 153
 154         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 155 }
 156
 157 static int
 158 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 159 {
 160         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 161         struct scatterlist *sgel = NULL;
 162         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 163         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 164         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 165         dma_addr_t physaddr;
 166         uint32_t i, num_bde = 0;
 167         int datadir = scsi_cmnd->sc_data_direction;
 168         int dma_error;
 169
 170         /*
 171          * There are three possibilities here - use scatter-gather segment, use
 172          * the single mapping, or neither.  Start the lpfc command prep by
 173          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 174          * data bde entry.
 175          */
 176         bpl += 2;
 177         if (scsi_cmnd->use_sg) {
 178                 /*
 179                  * The driver stores the segment count returned from pci_map_sg
 180                  * because this a count of dma-mappings used to map the use_sg
 181                  * pages.  They are not guaranteed to be the same for those
 182                  * architectures that implement an IOMMU.
 183                  */
 184                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 185                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 186                                                 scsi_cmnd->use_sg, datadir);
 187                 if (lpfc_cmd->seg_cnt == 0)
 188                         return 1;
 189
 190                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 191                         printk(KERN_ERR "%s: Too many sg segments from "
 192                                "dma_map_sg.  Config %d, seg_cnt %d",
 193                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 194                                lpfc_cmd->seg_cnt);
 195                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 196                                      lpfc_cmd->seg_cnt, datadir);
 197                         return 1;
 198                 }
 199
 200                 /*
 201                  * The driver established a maximum scatter-gather segment count
 202                  * during probe that limits the number of sg elements in any
 203                  * single scsi command.  Just run through the seg_cnt and format
 204                  * the bde's.
 205                  */
 206                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 207                         physaddr = sg_dma_address(sgel);
 208                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 209                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 210                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 211                         if (datadir == DMA_TO_DEVICE)
 212                                 bpl->tus.f.bdeFlags = 0;
 213                         else
 214                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 215                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 216                         bpl++;
 217                         sgel++;
 218                         num_bde++;
 219                 }
 220         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 221                 physaddr = dma_map_single(&phba->pcidev->dev,
 222                                           scsi_cmnd->request_buffer,
 223                                           scsi_cmnd->request_bufflen,
 224                                           datadir);
 225                 dma_error = dma_mapping_error(physaddr);
 226                 if (dma_error) {
 227                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 228                                 "%d:0718 Unable to dma_map_single "
 229                                 "request_buffer: x%x\n",
 230                                 phba->brd_no, dma_error);
 231                         return 1;
 232                 }
 233
 234                 lpfc_cmd->nonsg_phys = physaddr;
 235                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 236                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 237                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 238                 if (datadir == DMA_TO_DEVICE)
 239                         bpl->tus.f.bdeFlags = 0;
 240                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 241                 num_bde = 1;
 242                 bpl++;
 243         }
 244
 245         /*
 246          * Finish initializing those IOCB fields that are dependent on the
 247          * scsi_cmnd request_buffer
 248          */
 249         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 250                 (num_bde * sizeof (struct ulp_bde64));
 251         iocb_cmd->ulpBdeCount = 1;
 252         iocb_cmd->ulpLe = 1;
 253         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 254         return 0;
 255 }
 256
 257 static void
 258 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 259 {
 260         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 261         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 262         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 263         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 264         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 265         uint32_t resp_info = fcprsp->rspStatus2;
 266         uint32_t scsi_status = fcprsp->rspStatus3;
 267         uint32_t host_status = DID_OK;
 268         uint32_t rsplen = 0;
 269
 270         /*
 271          *  If this is a task management command, there is no
 272          *  scsi packet associated with this lpfc_cmd.  The driver
 273          *  consumes it.
 274          */
 275         if (fcpcmd->fcpCntl2) {
 276                 scsi_status = 0;
 277                 goto out;
 278         }
 279
 280         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 281                         "%d:0730 FCP command failed: RSP "
 282                         "Data: x%x x%x x%x x%x x%x x%x\n",
 283                         phba->brd_no, resp_info, scsi_status,
 284                         be32_to_cpu(fcprsp->rspResId),
 285                         be32_to_cpu(fcprsp->rspSnsLen),
 286                         be32_to_cpu(fcprsp->rspRspLen),
 287                         fcprsp->rspInfo3);
 288
 289         if (resp_info & RSP_LEN_VALID) {
 290                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 291                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 292                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 293                         host_status = DID_ERROR;
 294                         goto out;
 295                 }
 296         }
 297
 298         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 299                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 300                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 301                         snslen = SCSI_SENSE_BUFFERSIZE;
 302
 303                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 304         }
 305
 306         cmnd->resid = 0;
 307         if (resp_info & RESID_UNDER) {
 308                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 309
 310                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 311                                 "%d:0716 FCP Read Underrun, expected %d, "
 312                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 313                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 314                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 315
 316                 /*
 317                  * The cmnd->underflow is the minimum number of bytes that must
 318                  * be transfered for this command.  Provided a sense condition
 319                  * is not present, make sure the actual amount transferred is at
 320                  * least the underflow value or fail.
 321                  */
 322                 if (!(resp_info & SNS_LEN_VALID) &&
 323                     (scsi_status == SAM_STAT_GOOD) &&
 324                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 325                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 326                                         "%d:0717 FCP command x%x residual "
 327                                         "underrun converted to error "
 328                                         "Data: x%x x%x x%x\n", phba->brd_no,
 329                                         cmnd->cmnd[0], cmnd->request_bufflen,
 330                                         cmnd->resid, cmnd->underflow);
 331
 332                         host_status = DID_ERROR;
 333                 }
 334         } else if (resp_info & RESID_OVER) {
 335                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 336                                 "%d:0720 FCP command x%x residual "
 337                                 "overrun error. Data: x%x x%x \n",
 338                                 phba->brd_no, cmnd->cmnd[0],
 339                                 cmnd->request_bufflen, cmnd->resid);
 340                 host_status = DID_ERROR;
 341
 342         /*
 343          * Check SLI validation that all the transfer was actually done
 344          * (fcpi_parm should be zero). Apply check only to reads.
 345          */
 346         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 347                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 348                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 349                         "%d:0734 FCP Read Check Error Data: "
 350                         "x%x x%x x%x x%x\n", phba->brd_no,
 351                         be32_to_cpu(fcpcmd->fcpDl),
 352                         be32_to_cpu(fcprsp->rspResId),
 353                         fcpi_parm, cmnd->cmnd[0]);
 354                 host_status = DID_ERROR;
 355                 cmnd->resid = cmnd->request_bufflen;
 356         }
 357
 358  out:
 359         cmnd->result = ScsiResult(host_status, scsi_status);
 360 }
 361
 362 static void
 363 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 364                         struct lpfc_iocbq *pIocbOut)
 365 {
 366         struct lpfc_scsi_buf *lpfc_cmd =
 367                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 368         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 369         struct lpfc_nodelist *pnode = rdata->pnode;
 370         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 371         unsigned long iflag;
 372
 373         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 374         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 375
 376         if (lpfc_cmd->status) {
 377                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 378                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 379                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 380                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 381                         lpfc_cmd->status = IOSTAT_DEFAULT;
 382
 383                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 384                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 385                                 "x%x result: x%x Data: x%x x%x\n",
 386                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 387                                 cmd->device->lun, lpfc_cmd->status,
 388                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 389                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 390
 391                 switch (lpfc_cmd->status) {
 392                 case IOSTAT_FCP_RSP_ERROR:
 393                         /* Call FCP RSP handler to determine result */
 394                         lpfc_handle_fcp_err(lpfc_cmd);
 395                         break;
 396                 case IOSTAT_NPORT_BSY:
 397                 case IOSTAT_FABRIC_BSY:
 398                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 399                         break;
 400                 default:
 401                         cmd->result = ScsiResult(DID_ERROR, 0);
 402                         break;
 403                 }
 404
 405                 if (pnode) {
 406                         if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
 407                                 cmd->result = ScsiResult(DID_BUS_BUSY,
 408                                         SAM_STAT_BUSY);
 409                 }
 410                 else {
 411                         cmd->result = ScsiResult(DID_NO_CONNECT, 0);
 412                 }
 413         } else {
 414                 cmd->result = ScsiResult(DID_OK, 0);
 415         }
 416
 417         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 418                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 419
 420                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 421                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 422                                 "SNS x%x x%x Data: x%x x%x\n",
 423                                 phba->brd_no, cmd->device->id,
 424                                 cmd->device->lun, cmd, cmd->result,
 425                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 426         }
 427
 428         spin_lock_irqsave(phba->host->host_lock, iflag);
 429         lpfc_free_scsi_buf(lpfc_cmd);
 430         cmd->host_scribble = NULL;
 431         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 432
 433         cmd->scsi_done(cmd);
 434 }
 435
 436 static void
 437 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 438                         struct lpfc_nodelist *pnode)
 439 {
 440         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 441         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 442         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 443         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 444         int datadir = scsi_cmnd->sc_data_direction;
 445
 446         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 447
 448         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 449
 450         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 451
 452         if (scsi_cmnd->device->tagged_supported) {
 453                 switch (scsi_cmnd->tag) {
 454                 case HEAD_OF_QUEUE_TAG:
 455                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 456                         break;
 457                 case ORDERED_QUEUE_TAG:
 458                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 459                         break;
 460                 default:
 461                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 462                         break;
 463                 }
 464         } else
 465                 fcp_cmnd->fcpCntl1 = 0;
 466
 467         /*
 468          * There are three possibilities here - use scatter-gather segment, use
 469          * the single mapping, or neither.  Start the lpfc command prep by
 470          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 471          * data bde entry.
 472          */
 473         if (scsi_cmnd->use_sg) {
 474                 if (datadir == DMA_TO_DEVICE) {
 475                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 476                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 477                         iocb_cmd->ulpPU = 0;
 478                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 479                         phba->fc4OutputRequests++;
 480                 } else {
 481                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 482                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 483                         iocb_cmd->un.fcpi.fcpi_parm =
 484                                 scsi_cmnd->request_bufflen;
 485                         fcp_cmnd->fcpCntl3 = READ_DATA;
 486                         phba->fc4InputRequests++;
 487                 }
 488         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 489                 if (datadir == DMA_TO_DEVICE) {
 490                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 491                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 492                         iocb_cmd->ulpPU = 0;
 493                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 494                         phba->fc4OutputRequests++;
 495                 } else {
 496                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 497                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 498                         iocb_cmd->un.fcpi.fcpi_parm =
 499                                 scsi_cmnd->request_bufflen;
 500                         fcp_cmnd->fcpCntl3 = READ_DATA;
 501                         phba->fc4InputRequests++;
 502                 }
 503         } else {
 504                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 505                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 506                 iocb_cmd->ulpPU = 0;
 507                 fcp_cmnd->fcpCntl3 = 0;
 508                 phba->fc4ControlRequests++;
 509         }
 510
 511         /*
 512          * Finish initializing those IOCB fields that are independent
 513          * of the scsi_cmnd request_buffer
 514          */
 515         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 516         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 517                 piocbq->iocb.ulpFCP2Rcvy = 1;
 518
 519         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 520         piocbq->context1  = lpfc_cmd;
 521         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 522         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 523 }
 524
 525 static int
 526 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 527                              struct lpfc_scsi_buf *lpfc_cmd,
 528                              uint8_t task_mgmt_cmd)
 529 {
 530         struct lpfc_sli *psli;
 531         struct lpfc_iocbq *piocbq;
 532         IOCB_t *piocb;
 533         struct fcp_cmnd *fcp_cmnd;
 534         struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
 535         struct lpfc_rport_data *rdata = scsi_dev->hostdata;
 536         struct lpfc_nodelist *ndlp = rdata->pnode;
 537
 538         if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 539                 return 0;
 540         }
 541
 542         psli = &phba->sli;
 543         piocbq = &(lpfc_cmd->cur_iocbq);
 544         piocb = &piocbq->iocb;
 545
 546         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 547         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 726         int err = 0;
 727
 728         /*
 729          * The target pointer is guaranteed not to be NULL because the driver
 730          * only clears the device->hostdata field in lpfc_slave_destroy.  This
 731          * approach guarantees no further IO calls on this target.
 732          */
 733         if (!ndlp) {
 734                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 735                 goto out_fail_command;
 736         }
 737
 738         /*
 739          * A Fibre Channel target is present and functioning only when the node
 740          * state is MAPPED.  Any other state is a failure.
 741          */
 742         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
 743                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
 744                     (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
 745                         cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 746                         goto out_fail_command;
 747                 }
 748                 /*
 749                  * The device is most likely recovered and the driver
 750                  * needs a bit more time to finish.  Ask the midlayer
 751                  * to retry.
 752                  */
 753                 goto out_host_busy;
 754         }
 755
 756         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 757         if (lpfc_cmd == NULL) {
 758                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 759                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 760                 goto out_host_busy;
 761         }
 762
 763         /*
 764          * Store the midlayer's command structure for the completion phase
 765          * and complete the command initialization.
 766          */
 767         lpfc_cmd->pCmd  = cmnd;
 768         lpfc_cmd->rdata = rdata;
 769         lpfc_cmd->timeout = 0;
 770         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 771         cmnd->scsi_done = done;
 772
 773         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 774         if (err)
 775                 goto out_host_busy_free_buf;
 776
 777         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 778
 779         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 780                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 781         if (err)
 782                 goto out_host_busy_free_buf;
 783         return 0;
 784
 785  out_host_busy_free_buf:
 786         lpfc_free_scsi_buf(lpfc_cmd);
 787         cmnd->host_scribble = NULL;
 788  out_host_busy:
 789         return SCSI_MLQUEUE_HOST_BUSY;
 790
 791  out_fail_command:
 792         done(cmnd);
 793         return 0;
 794 }
 795
 796 static int
 797 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 798 {
 799         struct lpfc_hba *phba =
 800                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 801         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 802         struct lpfc_iocbq *iocb, *next_iocb;
 803         struct lpfc_iocbq *abtsiocb = NULL;
 804         struct lpfc_scsi_buf *lpfc_cmd;
 805         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 806         IOCB_t *cmd, *icmd;
 807         unsigned long snum;
 808         unsigned int id, lun;
 809         unsigned int loop_count = 0;
 810         int ret = IOCB_SUCCESS;
 811
 812         /*
 813          * If the host_scribble data area is NULL, then the driver has already
 814          * completed this command, but the midlayer did not see the completion
 815          * before the eh fired.  Just return SUCCESS.
 816          */
 817         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 818         if (!lpfc_cmd)
 819                 return SUCCESS;
 820
 821         /* save these now since lpfc_cmd can be freed */
 822         id   = lpfc_cmd->pCmd->device->id;
 823         lun  = lpfc_cmd->pCmd->device->lun;
 824         snum = lpfc_cmd->pCmd->serial_number;
 825
 826         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 827                 cmd = &iocb->iocb;
 828                 if (iocb->context1 != lpfc_cmd)
 829                         continue;
 830
 831                 list_del_init(&iocb->list);
 832                 pring->txq_cnt--;
 833                 if (!iocb->iocb_cmpl) {
 834                         list_add_tail(&iocb->list, lpfc_iocb_list);
 835                 }
 836                 else {
 837                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 838                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 839                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 840                 }
 841
 842                 goto out;
 843         }
 844
 845         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 846         if (abtsiocb == NULL)
 847                 return FAILED;
 848
 849         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 850
 851         /*
 852          * The scsi command was not in the txq.  Check the txcmplq and if it is
 853          * found, send an abort to the FW.
 854          */
 855         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 856                 if (iocb->context1 != lpfc_cmd)
 857                         continue;
 858
 859                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 860                 cmd = &iocb->iocb;
 861                 icmd = &abtsiocb->iocb;
 862                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 863                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 864                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 865
 866                 icmd->ulpLe = 1;
 867                 icmd->ulpClass = cmd->ulpClass;
 868                 if (phba->hba_state >= LPFC_LINK_UP)
 869                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 870                 else
 871                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 872
 873                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 874                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 875                                                                 IOCB_ERROR) {
 876                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 877                         ret = IOCB_ERROR;
 878                         break;
 879                 }
 880
 881                 /* Wait for abort to complete */
 882                 while (cmnd->host_scribble)
 883                 {
 884                         spin_unlock_irq(phba->host->host_lock);
 885                         set_current_state(TASK_UNINTERRUPTIBLE);
 886                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 887                         spin_lock_irq(phba->host->host_lock);
 888                         if (++loop_count
 889                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 890                                 break;
 891                 }
 892
 893                 if(cmnd->host_scribble) {
 894                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 895                                         "%d:0748 abort handler timed "
 896                                         "out waiting for abort to "
 897                                         "complete. Data: "
 898                                         "x%x x%x x%x x%lx\n",
 899                                         phba->brd_no, ret, id, lun, snum);
 900                         cmnd->host_scribble = NULL;
 901                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 902                         ret = IOCB_ERROR;
 903                 }
 904
 905                 break;
 906         }
 907
 908  out:
 909         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 910                         "%d:0749 SCSI layer issued abort device "
 911                         "Data: x%x x%x x%x x%lx\n",
 912                         phba->brd_no, ret, id, lun, snum);
 913
 914         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 915 }
 916
 917 static int
 918 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 919 {
 920         int rc;
 921         spin_lock_irq(cmnd->device->host->host_lock);
 922         rc = __lpfc_abort_handler(cmnd);
 923         spin_unlock_irq(cmnd->device->host->host_lock);
 924         return rc;
 925 }
 926
 927 static int
 928 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 929 {
 930         struct Scsi_Host *shost = cmnd->device->host;
 931         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 932         struct lpfc_sli *psli = &phba->sli;
 933         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 934         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 935         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 936         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 937         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 938         struct lpfc_nodelist *pnode = rdata->pnode;
 939         int ret = FAILED;
 940         int cnt, loopcnt;
 941
 942         /*
 943          * If target is not in a MAPPED state, delay the reset until
 944          * target is rediscovered or nodev timeout expires.
 945          */
 946         while ( 1 ) {
 947                 if (!pnode)
 948                         break;
 949
 950                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 951                         spin_unlock_irq(phba->host->host_lock);
 952                         set_current_state(TASK_UNINTERRUPTIBLE);
 953                         schedule_timeout( HZ/2);
 954                         spin_lock_irq(phba->host->host_lock);
 955                 }
 956                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 957                         break;
 958         }
 959
 960         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 961         if (lpfc_cmd == NULL)
 962                 goto out;
 963
 964         lpfc_cmd->pCmd = cmnd;
 965         lpfc_cmd->timeout = 60;
 966         lpfc_cmd->scsi_hba = phba;
 967
 968         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 969         if (!ret)
 970                 goto out_free_scsi_buf;
 971
 972         iocbq = &lpfc_cmd->cur_iocbq;
 973
 974         /* get a buffer for this IOCB command response */
 975         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 976         if (iocbqrsp == NULL)
 977                 goto out_free_scsi_buf;
 978
 979         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 980
 981         iocbq->iocb_flag |= LPFC_IO_POLL;
 982         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 983
 984         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 985                      &phba->sli.ring[psli->fcp_ring],
 986                      iocbq, 0, iocbqrsp, 60);
 987         if (ret == IOCB_SUCCESS)
 988                 ret = SUCCESS;
 989
 990         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 991         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 992         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
 993                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
 994                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 995
 996         /*
 997          * All outstanding txcmplq I/Os should have been aborted by the target.
 998          * Unfortunately, some targets do not abide by this forcing the driver
 999          * to double check.
1000          */
1001         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1002                             cmnd->device->id, cmnd->device->lun, 0,
1003                             LPFC_CTX_LUN);
1004
1005         loopcnt = 0;
1006         while((cnt = lpfc_sli_sum_iocb(phba,
1007                                        &phba->sli.ring[phba->sli.fcp_ring],
1008                                        cmnd->device->id, cmnd->device->lun,
1009                                        LPFC_CTX_LUN))) {
1010                 spin_unlock_irq(phba->host->host_lock);
1011                 set_current_state(TASK_UNINTERRUPTIBLE);
1012                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1013                 spin_lock_irq(phba->host->host_lock);
1014
1015                 if (++loopcnt
1016                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1017                         break;
1018         }
1019
1020         if (cnt) {
1021                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1022                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1023                         phba->brd_no, cnt);
1024         }
1025
1026         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1027
1028 out_free_scsi_buf:
1029         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1030                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1031                         "Data: x%x x%x x%x\n",
1032                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1033                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1034                         lpfc_cmd->result);
1035         lpfc_free_scsi_buf(lpfc_cmd);
1036 out:
1037         return ret;
1038 }
1039
1040 static int
1041 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1042 {
1043         int rc;
1044         spin_lock_irq(cmnd->device->host->host_lock);
1045         rc = __lpfc_reset_lun_handler(cmnd);
1046         spin_unlock_irq(cmnd->device->host->host_lock);
1047         return rc;
1048 }
1049
1050 /*
1051  * Note: midlayer calls this function with the host_lock held
1052  */
1053 static int
1054 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1055 {
1056         struct Scsi_Host *shost = cmnd->device->host;
1057         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1058         struct lpfc_nodelist *ndlp = NULL;
1059         int match;
1060         int ret = FAILED, i, err_count = 0;
1061         int cnt, loopcnt;
1062         unsigned int midlayer_id = 0;
1063         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1064         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1065
1066         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1067         if (lpfc_cmd == NULL)
1068                 goto out;
1069
1070         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1071         lpfc_cmd->timeout = 60;
1072         lpfc_cmd->pCmd = cmnd;
1073         lpfc_cmd->scsi_hba = phba;
1074
1075         /*
1076          * Since the driver manages a single bus device, reset all
1077          * targets known to the driver.  Should any target reset
1078          * fail, this routine returns failure to the midlayer.
1079          */
1080         midlayer_id = cmnd->device->id;
1081         for (i = 0; i < MAX_FCP_TARGET; i++) {
1082                 /* Search the mapped list for this target ID */
1083                 match = 0;
1084                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1085                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1086                                 match = 1;
1087                                 break;
1088                         }
1089                 }
1090                 if (!match)
1091                         continue;
1092
1093                 lpfc_cmd->pCmd->device->id = i;
1094                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1095                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1096                 if (ret != SUCCESS) {
1097                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1098                                 "%d:0713 Bus Reset on target %d failed\n",
1099                                 phba->brd_no, i);
1100                         err_count++;
1101                 }
1102         }
1103
1104         cmnd->device->id = midlayer_id;
1105         loopcnt = 0;
1106         while((cnt = lpfc_sli_sum_iocb(phba,
1107                                 &phba->sli.ring[phba->sli.fcp_ring],
1108                                 0, 0, LPFC_CTX_HOST))) {
1109                 spin_unlock_irq(phba->host->host_lock);
1110                 set_current_state(TASK_UNINTERRUPTIBLE);
1111                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1112                 spin_lock_irq(phba->host->host_lock);
1113
1114                 if (++loopcnt
1115                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1116                         break;
1117         }
1118
1119         if (cnt) {
1120                 /* flush all outstanding commands on the host */
1121                 i = lpfc_sli_abort_iocb(phba,
1122                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1123                                 LPFC_CTX_HOST);
1124
1125                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1126                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1127                    phba->brd_no, cnt, i);
1128         }
1129
1130         if (!err_count)
1131                 ret = SUCCESS;
1132
1133         lpfc_free_scsi_buf(lpfc_cmd);
1134         lpfc_printf_log(phba,
1135                         KERN_ERR,
1136                         LOG_FCP,
1137                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1138                         phba->brd_no, ret);
1139 out:
1140         return ret;
1141 }
1142
1143 static int
1144 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1145 {
1146         int rc;
1147         spin_lock_irq(cmnd->device->host->host_lock);
1148         rc = __lpfc_reset_bus_handler(cmnd);
1149         spin_unlock_irq(cmnd->device->host->host_lock);
1150         return rc;
1151 }
1152
1153 static int
1154 lpfc_slave_alloc(struct scsi_device *sdev)
1155 {
1156         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1157         struct lpfc_nodelist *ndlp = NULL;
1158         int match = 0;
1159         struct lpfc_scsi_buf *scsi_buf = NULL;
1160         uint32_t total = 0, i;
1161         uint32_t num_to_alloc = 0;
1162         unsigned long flags;
1163         struct list_head *listp;
1164         struct list_head *node_list[6];
1165
1166         /*
1167          * Store the target pointer in the scsi_device hostdata pointer provided
1168          * the driver has already discovered the target id.
1169          */
1170
1171         /* Search the nlp lists other than unmap_list for this target ID */
1172         node_list[0] = &phba->fc_npr_list;
1173         node_list[1] = &phba->fc_nlpmap_list;
1174         node_list[2] = &phba->fc_prli_list;
1175         node_list[3] = &phba->fc_reglogin_list;
1176         node_list[4] = &phba->fc_adisc_list;
1177         node_list[5] = &phba->fc_plogi_list;
1178
1179         for (i = 0; i < 6 && !match; i++) {
1180                 listp = node_list[i];
1181                 if (list_empty(listp))
1182                         continue;
1183                 list_for_each_entry(ndlp, listp, nlp_listp) {
1184                         if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1185                                 match = 1;
1186                                 break;
1187                         }
1188                 }
1189         }
1190
1191         if (!match)
1192                 return -ENXIO;
1193
1194         sdev->hostdata = ndlp->rport->dd_data;
1195
1196         /*
1197          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1198          * available list of scsi buffers.  Don't allocate more than the
1199          * HBA limit conveyed to the midlayer via the host structure.  Note
1200          * that this list of scsi bufs exists for the lifetime of the driver.
1201          */
1202         total = phba->total_scsi_bufs;
1203         num_to_alloc = LPFC_CMD_PER_LUN;
1204         if (total >= phba->cfg_hba_queue_depth) {
1205                 printk(KERN_WARNING "%s, At config limitation of "
1206                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1207                 return 0;
1208         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1209                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1210         }
1211
1212         for (i = 0; i < num_to_alloc; i++) {
1213                 scsi_buf = lpfc_get_scsi_buf(phba);
1214                 if (!scsi_buf) {
1215                         printk(KERN_ERR "%s, failed to allocate "
1216                                "scsi_buf\n", __FUNCTION__);
1217                         break;
1218                 }
1219
1220                 spin_lock_irqsave(phba->host->host_lock, flags);
1221                 phba->total_scsi_bufs++;
1222                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1223                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1224         }
1225         return 0;
1226 }
1227
1228 static int
1229 lpfc_slave_configure(struct scsi_device *sdev)
1230 {
1231         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1232         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1233
1234         if (sdev->tagged_supported)
1235                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1236         else
1237                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1238
1239         /*
1240          * Initialize the fc transport attributes for the target
1241          * containing this scsi device.  Also note that the driver's
1242          * target pointer is stored in the starget_data for the
1243          * driver's sysfs entry point functions.
1244          */
1245         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1246
1247         return 0;
1248 }
1249
1250 static void
1251 lpfc_slave_destroy(struct scsi_device *sdev)
1252 {
1253         sdev->hostdata = NULL;
1254         return;
1255 }
1256
1257 struct scsi_host_template lpfc_template = {
1258         .module                 = THIS_MODULE,
1259         .name                   = LPFC_DRIVER_NAME,
1260         .info                   = lpfc_info,
1261         .queuecommand           = lpfc_queuecommand,
1262         .eh_abort_handler       = lpfc_abort_handler,
1263         .eh_device_reset_handler= lpfc_reset_lun_handler,
1264         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1265         .slave_alloc            = lpfc_slave_alloc,
1266         .slave_configure        = lpfc_slave_configure,
1267         .slave_destroy          = lpfc_slave_destroy,
1268         .this_id                = -1,
1269         .sg_tablesize           = LPFC_SG_SEG_CNT,
1270         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1271         .use_clustering         = ENABLE_CLUSTERING,
1272         .shost_attrs            = lpfc_host_attrs,
1273         .max_sectors            = 0xFFFF,
1274 };