drivers/scsi/lpfc/lpfc_scsi.c

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