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         iocbq->iocb_flag |= LPFC_IO_POLL;
 641         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 642                      &phba->sli.ring[phba->sli.fcp_ring],
 643                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 644                      iocbqrsp,
 645                      lpfc_cmd->timeout);
 646         if (ret != IOCB_SUCCESS) {
 647                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 648                 ret = FAILED;
 649         } else {
 650                 ret = SUCCESS;
 651                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 652                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 653                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 654                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 655                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 656         }
 657
 658         /*
 659          * All outstanding txcmplq I/Os should have been aborted by the target.
 660          * Unfortunately, some targets do not abide by this forcing the driver
 661          * to double check.
 662          */
 663         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 664                             lpfc_cmd->pCmd->device->id,
 665                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 666
 667         lpfc_sli_release_iocbq(phba, iocbqrsp);
 668         return ret;
 669 }
 670
 671 static void
 672 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 673                             struct lpfc_iocbq *pIocbOut)
 674 {
 675         unsigned long iflag;
 676         struct lpfc_scsi_buf *lpfc_cmd =
 677                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 678
 679         spin_lock_irqsave(phba->host->host_lock, iflag);
 680         lpfc_free_scsi_buf(lpfc_cmd);
 681         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 682 }
 683
 684 static void
 685 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 686                                 struct lpfc_iocbq *pIocbIn,
 687                                 struct lpfc_iocbq *pIocbOut)
 688 {
 689         struct scsi_cmnd *ml_cmd =
 690                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 691
 692         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 693         ml_cmd->host_scribble = NULL;
 694 }
 695
 696 const char *
 697 lpfc_info(struct Scsi_Host *host)
 698 {
 699         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 700         int len;
 701         static char  lpfcinfobuf[384];
 702
 703         memset(lpfcinfobuf,0,384);
 704         if (phba && phba->pcidev){
 705                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 706                 len = strlen(lpfcinfobuf);
 707                 snprintf(lpfcinfobuf + len,
 708                         384-len,
 709                         " on PCI bus %02x device %02x irq %d",
 710                         phba->pcidev->bus->number,
 711                         phba->pcidev->devfn,
 712                         phba->pcidev->irq);
 713                 len = strlen(lpfcinfobuf);
 714                 if (phba->Port[0]) {
 715                         snprintf(lpfcinfobuf + len,
 716                                  384-len,
 717                                  " port %s",
 718                                  phba->Port);
 719                 }
 720         }
 721         return lpfcinfobuf;
 722 }
 723
 724 static int
 725 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 726 {
 727         struct lpfc_hba *phba =
 728                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 729         struct lpfc_sli *psli = &phba->sli;
 730         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 731         struct lpfc_nodelist *ndlp = rdata->pnode;
 732         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 733         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 734         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 735         int err;
 736
 737         err = fc_remote_port_chkready(rport);
 738         if (err) {
 739                 cmnd->result = err;
 740                 goto out_fail_command;
 741         }
 742
 743         /*
 744          * Catch race where our node has transitioned, but the
 745          * transport is still transitioning.
 746          */
 747         if (!ndlp) {
 748                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 749                 goto out_fail_command;
 750         }
 751
 752         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 753         if (lpfc_cmd == NULL) {
 754                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 755                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 756                 goto out_host_busy;
 757         }
 758
 759         /*
 760          * Store the midlayer's command structure for the completion phase
 761          * and complete the command initialization.
 762          */
 763         lpfc_cmd->pCmd  = cmnd;
 764         lpfc_cmd->rdata = rdata;
 765         lpfc_cmd->timeout = 0;
 766         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 767         cmnd->scsi_done = done;
 768
 769         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 770         if (err)
 771                 goto out_host_busy_free_buf;
 772
 773         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 774
 775         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 776                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 777         if (err)
 778                 goto out_host_busy_free_buf;
 779         return 0;
 780
 781  out_host_busy_free_buf:
 782         lpfc_free_scsi_buf(lpfc_cmd);
 783         cmnd->host_scribble = NULL;
 784  out_host_busy:
 785         return SCSI_MLQUEUE_HOST_BUSY;
 786
 787  out_fail_command:
 788         done(cmnd);
 789         return 0;
 790 }
 791
 792 static int
 793 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 794 {
 795         struct lpfc_hba *phba =
 796                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 797         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 798         struct lpfc_iocbq *iocb, *next_iocb;
 799         struct lpfc_iocbq *abtsiocb = NULL;
 800         struct lpfc_scsi_buf *lpfc_cmd;
 801         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 802         IOCB_t *cmd, *icmd;
 803         unsigned long snum;
 804         unsigned int id, lun;
 805         unsigned int loop_count = 0;
 806         int ret = IOCB_SUCCESS;
 807
 808         /*
 809          * If the host_scribble data area is NULL, then the driver has already
 810          * completed this command, but the midlayer did not see the completion
 811          * before the eh fired.  Just return SUCCESS.
 812          */
 813         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 814         if (!lpfc_cmd)
 815                 return SUCCESS;
 816
 817         /* save these now since lpfc_cmd can be freed */
 818         id   = lpfc_cmd->pCmd->device->id;
 819         lun  = lpfc_cmd->pCmd->device->lun;
 820         snum = lpfc_cmd->pCmd->serial_number;
 821
 822         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 823                 cmd = &iocb->iocb;
 824                 if (iocb->context1 != lpfc_cmd)
 825                         continue;
 826
 827                 list_del_init(&iocb->list);
 828                 pring->txq_cnt--;
 829                 if (!iocb->iocb_cmpl)
 830                         lpfc_sli_release_iocbq(phba, iocb);
 831                 else {
 832                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 833                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 834                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 835                 }
 836
 837                 goto out;
 838         }
 839
 840         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 841         if (abtsiocb == NULL)
 842                 return FAILED;
 843
 844         /*
 845          * The scsi command was not in the txq.  Check the txcmplq and if it is
 846          * found, send an abort to the FW.
 847          */
 848         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 849                 if (iocb->context1 != lpfc_cmd)
 850                         continue;
 851
 852                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 853                 cmd = &iocb->iocb;
 854                 icmd = &abtsiocb->iocb;
 855                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 856                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 857                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 858
 859                 icmd->ulpLe = 1;
 860                 icmd->ulpClass = cmd->ulpClass;
 861                 if (phba->hba_state >= LPFC_LINK_UP)
 862                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 863                 else
 864                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 865
 866                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 867                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 868                                                                 IOCB_ERROR) {
 869                         lpfc_sli_release_iocbq(phba, abtsiocb);
 870                         ret = IOCB_ERROR;
 871                         break;
 872                 }
 873
 874                 /* Wait for abort to complete */
 875                 while (cmnd->host_scribble)
 876                 {
 877                         spin_unlock_irq(phba->host->host_lock);
 878                         set_current_state(TASK_UNINTERRUPTIBLE);
 879                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 880                         spin_lock_irq(phba->host->host_lock);
 881                         if (++loop_count
 882                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 883                                 break;
 884                 }
 885
 886                 if(cmnd->host_scribble) {
 887                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 888                                         "%d:0748 abort handler timed "
 889                                         "out waiting for abort to "
 890                                         "complete. Data: "
 891                                         "x%x x%x x%x x%lx\n",
 892                                         phba->brd_no, ret, id, lun, snum);
 893                         cmnd->host_scribble = NULL;
 894                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 895                         ret = IOCB_ERROR;
 896                 }
 897
 898                 break;
 899         }
 900
 901  out:
 902         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 903                         "%d:0749 SCSI layer issued abort device "
 904                         "Data: x%x x%x x%x x%lx\n",
 905                         phba->brd_no, ret, id, lun, snum);
 906
 907         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 908 }
 909
 910 static int
 911 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 912 {
 913         int rc;
 914         spin_lock_irq(cmnd->device->host->host_lock);
 915         rc = __lpfc_abort_handler(cmnd);
 916         spin_unlock_irq(cmnd->device->host->host_lock);
 917         return rc;
 918 }
 919
 920 static int
 921 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 922 {
 923         struct Scsi_Host *shost = cmnd->device->host;
 924         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 925         struct lpfc_sli *psli = &phba->sli;
 926         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 927         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 928         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 929         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 930         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 931         struct lpfc_nodelist *pnode = rdata->pnode;
 932         int ret = FAILED;
 933         int cnt, loopcnt;
 934
 935         /*
 936          * If target is not in a MAPPED state, delay the reset until
 937          * target is rediscovered or nodev timeout expires.
 938          */
 939         while ( 1 ) {
 940                 if (!pnode)
 941                         break;
 942
 943                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 944                         spin_unlock_irq(phba->host->host_lock);
 945                         set_current_state(TASK_UNINTERRUPTIBLE);
 946                         schedule_timeout( HZ/2);
 947                         spin_lock_irq(phba->host->host_lock);
 948                 }
 949                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 950                         break;
 951         }
 952
 953         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 954         if (lpfc_cmd == NULL)
 955                 goto out;
 956
 957         lpfc_cmd->pCmd = cmnd;
 958         lpfc_cmd->timeout = 60;
 959         lpfc_cmd->scsi_hba = phba;
 960
 961         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 962         if (!ret)
 963                 goto out_free_scsi_buf;
 964
 965         iocbq = &lpfc_cmd->cur_iocbq;
 966
 967         /* get a buffer for this IOCB command response */
 968         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 969         if (iocbqrsp == NULL)
 970                 goto out_free_scsi_buf;
 971
 972         iocbq->iocb_flag |= LPFC_IO_POLL;
 973         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 974
 975         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 976                      &phba->sli.ring[psli->fcp_ring],
 977                      iocbq, 0, iocbqrsp, 60);
 978         if (ret == IOCB_SUCCESS)
 979                 ret = SUCCESS;
 980
 981         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 982         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 983         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
 984                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
 985                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 986
 987         /*
 988          * All outstanding txcmplq I/Os should have been aborted by the target.
 989          * Unfortunately, some targets do not abide by this forcing the driver
 990          * to double check.
 991          */
 992         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 993                             cmnd->device->id, cmnd->device->lun, 0,
 994                             LPFC_CTX_LUN);
 995
 996         loopcnt = 0;
 997         while((cnt = lpfc_sli_sum_iocb(phba,
 998                                        &phba->sli.ring[phba->sli.fcp_ring],
 999                                        cmnd->device->id, cmnd->device->lun,
1000                                        LPFC_CTX_LUN))) {
1001                 spin_unlock_irq(phba->host->host_lock);
1002                 set_current_state(TASK_UNINTERRUPTIBLE);
1003                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1004                 spin_lock_irq(phba->host->host_lock);
1005
1006                 if (++loopcnt
1007                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1008                         break;
1009         }
1010
1011         if (cnt) {
1012                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1013                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1014                         phba->brd_no, cnt);
1015         }
1016
1017         lpfc_sli_release_iocbq(phba, iocbqrsp);
1018
1019 out_free_scsi_buf:
1020         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1021                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1022                         "Data: x%x x%x x%x\n",
1023                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1024                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1025                         lpfc_cmd->result);
1026         lpfc_free_scsi_buf(lpfc_cmd);
1027 out:
1028         return ret;
1029 }
1030
1031 static int
1032 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1033 {
1034         int rc;
1035         spin_lock_irq(cmnd->device->host->host_lock);
1036         rc = __lpfc_reset_lun_handler(cmnd);
1037         spin_unlock_irq(cmnd->device->host->host_lock);
1038         return rc;
1039 }
1040
1041 /*
1042  * Note: midlayer calls this function with the host_lock held
1043  */
1044 static int
1045 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1046 {
1047         struct Scsi_Host *shost = cmnd->device->host;
1048         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1049         struct lpfc_nodelist *ndlp = NULL;
1050         int match;
1051         int ret = FAILED, i, err_count = 0;
1052         int cnt, loopcnt;
1053         unsigned int midlayer_id = 0;
1054         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1055         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1056
1057         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1058         if (lpfc_cmd == NULL)
1059                 goto out;
1060
1061         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1062         lpfc_cmd->timeout = 60;
1063         lpfc_cmd->pCmd = cmnd;
1064         lpfc_cmd->scsi_hba = phba;
1065
1066         /*
1067          * Since the driver manages a single bus device, reset all
1068          * targets known to the driver.  Should any target reset
1069          * fail, this routine returns failure to the midlayer.
1070          */
1071         midlayer_id = cmnd->device->id;
1072         for (i = 0; i < MAX_FCP_TARGET; i++) {
1073                 /* Search the mapped list for this target ID */
1074                 match = 0;
1075                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1076                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1077                                 match = 1;
1078                                 break;
1079                         }
1080                 }
1081                 if (!match)
1082                         continue;
1083
1084                 lpfc_cmd->pCmd->device->id = i;
1085                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1086                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1087                 if (ret != SUCCESS) {
1088                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1089                                 "%d:0713 Bus Reset on target %d failed\n",
1090                                 phba->brd_no, i);
1091                         err_count++;
1092                 }
1093         }
1094
1095         cmnd->device->id = midlayer_id;
1096         loopcnt = 0;
1097         while((cnt = lpfc_sli_sum_iocb(phba,
1098                                 &phba->sli.ring[phba->sli.fcp_ring],
1099                                 0, 0, LPFC_CTX_HOST))) {
1100                 spin_unlock_irq(phba->host->host_lock);
1101                 set_current_state(TASK_UNINTERRUPTIBLE);
1102                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1103                 spin_lock_irq(phba->host->host_lock);
1104
1105                 if (++loopcnt
1106                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1107                         break;
1108         }
1109
1110         if (cnt) {
1111                 /* flush all outstanding commands on the host */
1112                 i = lpfc_sli_abort_iocb(phba,
1113                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1114                                 LPFC_CTX_HOST);
1115
1116                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1117                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1118                    phba->brd_no, cnt, i);
1119         }
1120
1121         if (!err_count)
1122                 ret = SUCCESS;
1123
1124         lpfc_free_scsi_buf(lpfc_cmd);
1125         lpfc_printf_log(phba,
1126                         KERN_ERR,
1127                         LOG_FCP,
1128                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1129                         phba->brd_no, ret);
1130 out:
1131         return ret;
1132 }
1133
1134 static int
1135 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1136 {
1137         int rc;
1138         spin_lock_irq(cmnd->device->host->host_lock);
1139         rc = __lpfc_reset_bus_handler(cmnd);
1140         spin_unlock_irq(cmnd->device->host->host_lock);
1141         return rc;
1142 }
1143
1144 static int
1145 lpfc_slave_alloc(struct scsi_device *sdev)
1146 {
1147         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1148         struct lpfc_scsi_buf *scsi_buf = NULL;
1149         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1150         uint32_t total = 0, i;
1151         uint32_t num_to_alloc = 0;
1152         unsigned long flags;
1153
1154         if (!rport || fc_remote_port_chkready(rport))
1155                 return -ENXIO;
1156
1157         sdev->hostdata = rport->dd_data;
1158
1159         /*
1160          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1161          * available list of scsi buffers.  Don't allocate more than the
1162          * HBA limit conveyed to the midlayer via the host structure.  Note
1163          * that this list of scsi bufs exists for the lifetime of the driver.
1164          */
1165         total = phba->total_scsi_bufs;
1166         num_to_alloc = LPFC_CMD_PER_LUN;
1167         if (total >= phba->cfg_hba_queue_depth) {
1168                 printk(KERN_WARNING "%s, At config limitation of "
1169                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1170                 return 0;
1171         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1172                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1173         }
1174
1175         for (i = 0; i < num_to_alloc; i++) {
1176                 scsi_buf = lpfc_get_scsi_buf(phba);
1177                 if (!scsi_buf) {
1178                         printk(KERN_ERR "%s, failed to allocate "
1179                                "scsi_buf\n", __FUNCTION__);
1180                         break;
1181                 }
1182
1183                 spin_lock_irqsave(phba->host->host_lock, flags);
1184                 phba->total_scsi_bufs++;
1185                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1186                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1187         }
1188         return 0;
1189 }
1190
1191 static int
1192 lpfc_slave_configure(struct scsi_device *sdev)
1193 {
1194         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1195         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1196
1197         if (sdev->tagged_supported)
1198                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1199         else
1200                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1201
1202         /*
1203          * Initialize the fc transport attributes for the target
1204          * containing this scsi device.  Also note that the driver's
1205          * target pointer is stored in the starget_data for the
1206          * driver's sysfs entry point functions.
1207          */
1208         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1209
1210         return 0;
1211 }
1212
1213 static void
1214 lpfc_slave_destroy(struct scsi_device *sdev)
1215 {
1216         sdev->hostdata = NULL;
1217         return;
1218 }
1219
1220 struct scsi_host_template lpfc_template = {
1221         .module                 = THIS_MODULE,
1222         .name                   = LPFC_DRIVER_NAME,
1223         .info                   = lpfc_info,
1224         .queuecommand           = lpfc_queuecommand,
1225         .eh_abort_handler       = lpfc_abort_handler,
1226         .eh_device_reset_handler= lpfc_reset_lun_handler,
1227         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1228         .slave_alloc            = lpfc_slave_alloc,
1229         .slave_configure        = lpfc_slave_configure,
1230         .slave_destroy          = lpfc_slave_destroy,
1231         .this_id                = -1,
1232         .sg_tablesize           = LPFC_SG_SEG_CNT,
1233         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1234         .use_clustering         = ENABLE_CLUSTERING,
1235         .shost_attrs            = lpfc_host_attrs,
1236         .max_sectors            = 0xFFFF,
1237 };