drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24
  25 #include <scsi/scsi.h>
  26 #include <scsi/scsi_device.h>
  27 #include <scsi/scsi_host.h>
  28 #include <scsi/scsi_tcq.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 #include "lpfc_version.h"
  32 #include "lpfc_hw.h"
  33 #include "lpfc_sli.h"
  34 #include "lpfc_disc.h"
  35 #include "lpfc_scsi.h"
  36 #include "lpfc.h"
  37 #include "lpfc_logmsg.h"
  38 #include "lpfc_crtn.h"
  39
  40 #define LPFC_RESET_WAIT  2
  41 #define LPFC_ABORT_WAIT  2
  42
  43 static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
  44 {
  45         fcmd->fcpLunLsl = 0;
  46         fcmd->fcpLunMsl = swab16((uint16_t)lun);
  47 }
  48
  49 /*
  50  * This routine allocates a scsi buffer, which contains all the necessary
  51  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  52  * contains information to build the IOCB.  The DMAable region contains
  53  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  54  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  55  * and the BPL BDE is setup in the IOCB.
  56  */
  57 static struct lpfc_scsi_buf *
  58 lpfc_get_scsi_buf(struct lpfc_hba * phba)
  59 {
  60         struct lpfc_scsi_buf *psb;
  61         struct ulp_bde64 *bpl;
  62         IOCB_t *iocb;
  63         dma_addr_t pdma_phys;
  64
  65         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  66         if (!psb)
  67                 return NULL;
  68         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  69         psb->scsi_hba = phba;
  70
  71         /*
  72          * Get memory from the pci pool to map the virt space to pci bus space
  73          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  74          * struct fcp_rsp and the number of bde's necessary to support the
  75          * sg_tablesize.
  76          */
  77         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  78                                                         &psb->dma_handle);
  79         if (!psb->data) {
  80                 kfree(psb);
  81                 return NULL;
  82         }
  83
  84         /* Initialize virtual ptrs to dma_buf region. */
  85         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  86
  87         psb->fcp_cmnd = psb->data;
  88         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  89         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  90                                                         sizeof(struct fcp_rsp);
  91
  92         /* Initialize local short-hand pointers. */
  93         bpl = psb->fcp_bpl;
  94         pdma_phys = psb->dma_handle;
  95
  96         /*
  97          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
  98          * list bdes.  Initialize the first two and leave the rest for
  99          * queuecommand.
 100          */
 101         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 102         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 103         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 104         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 105         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 106         bpl++;
 107
 108         /* Setup the physical region for the FCP RSP */
 109         pdma_phys += sizeof (struct fcp_cmnd);
 110         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 111         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 112         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 113         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 114         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 115
 116         /*
 117          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 118          * initialize it with all known data now.
 119          */
 120         pdma_phys += (sizeof (struct fcp_rsp));
 121         iocb = &psb->cur_iocbq.iocb;
 122         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 123         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 124         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 125         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 126         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 127         iocb->ulpBdeCount = 1;
 128         iocb->ulpClass = CLASS3;
 129
 130         return psb;
 131 }
 132
 133 static void
 134 lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
 135 {
 136         struct lpfc_hba *phba = psb->scsi_hba;
 137
 138         /*
 139          * There are only two special cases to consider.  (1) the scsi command
 140          * requested scatter-gather usage or (2) the scsi command allocated
 141          * a request buffer, but did not request use_sg.  There is a third
 142          * case, but it does not require resource deallocation.
 143          */
 144         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 145                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 146                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 147         } else {
 148                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 149                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 150                                                 psb->pCmd->request_bufflen,
 151                                                 psb->pCmd->sc_data_direction);
 152                  }
 153         }
 154
 155         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 156 }
 157
 158 static int
 159 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 160 {
 161         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 162         struct scatterlist *sgel = NULL;
 163         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 164         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 165         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 166         dma_addr_t physaddr;
 167         uint32_t i, num_bde = 0;
 168         int datadir = scsi_cmnd->sc_data_direction;
 169         int dma_error;
 170
 171         /*
 172          * There are three possibilities here - use scatter-gather segment, use
 173          * the single mapping, or neither.  Start the lpfc command prep by
 174          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 175          * data bde entry.
 176          */
 177         bpl += 2;
 178         if (scsi_cmnd->use_sg) {
 179                 /*
 180                  * The driver stores the segment count returned from pci_map_sg
 181                  * because this a count of dma-mappings used to map the use_sg
 182                  * pages.  They are not guaranteed to be the same for those
 183                  * architectures that implement an IOMMU.
 184                  */
 185                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 186                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 187                                                 scsi_cmnd->use_sg, datadir);
 188                 if (lpfc_cmd->seg_cnt == 0)
 189                         return 1;
 190
 191                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 192                         printk(KERN_ERR "%s: Too many sg segments from "
 193                                "dma_map_sg.  Config %d, seg_cnt %d",
 194                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 195                                lpfc_cmd->seg_cnt);
 196                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 197                                      lpfc_cmd->seg_cnt, datadir);
 198                         return 1;
 199                 }
 200
 201                 /*
 202                  * The driver established a maximum scatter-gather segment count
 203                  * during probe that limits the number of sg elements in any
 204                  * single scsi command.  Just run through the seg_cnt and format
 205                  * the bde's.
 206                  */
 207                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 208                         physaddr = sg_dma_address(sgel);
 209                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 210                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 211                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 212                         if (datadir == DMA_TO_DEVICE)
 213                                 bpl->tus.f.bdeFlags = 0;
 214                         else
 215                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 216                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 217                         bpl++;
 218                         sgel++;
 219                         num_bde++;
 220                 }
 221         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 222                 physaddr = dma_map_single(&phba->pcidev->dev,
 223                                           scsi_cmnd->request_buffer,
 224                                           scsi_cmnd->request_bufflen,
 225                                           datadir);
 226                 dma_error = dma_mapping_error(physaddr);
 227                 if (dma_error) {
 228                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 229                                 "%d:0718 Unable to dma_map_single "
 230                                 "request_buffer: x%x\n",
 231                                 phba->brd_no, dma_error);
 232                         return 1;
 233                 }
 234
 235                 lpfc_cmd->nonsg_phys = physaddr;
 236                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 237                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 238                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 239                 if (datadir == DMA_TO_DEVICE)
 240                         bpl->tus.f.bdeFlags = 0;
 241                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 242                 num_bde = 1;
 243                 bpl++;
 244         }
 245
 246         /*
 247          * Finish initializing those IOCB fields that are dependent on the
 248          * scsi_cmnd request_buffer
 249          */
 250         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 251                 (num_bde * sizeof (struct ulp_bde64));
 252         iocb_cmd->ulpBdeCount = 1;
 253         iocb_cmd->ulpLe = 1;
 254         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 255         return 0;
 256 }
 257
 258 static void
 259 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 260 {
 261         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 262         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 263         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 264         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 265         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 266         uint32_t resp_info = fcprsp->rspStatus2;
 267         uint32_t scsi_status = fcprsp->rspStatus3;
 268         uint32_t host_status = DID_OK;
 269         uint32_t rsplen = 0;
 270
 271         /*
 272          *  If this is a task management command, there is no
 273          *  scsi packet associated with this lpfc_cmd.  The driver
 274          *  consumes it.
 275          */
 276         if (fcpcmd->fcpCntl2) {
 277                 scsi_status = 0;
 278                 goto out;
 279         }
 280
 281         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 282                         "%d:0730 FCP command failed: RSP "
 283                         "Data: x%x x%x x%x x%x x%x x%x\n",
 284                         phba->brd_no, resp_info, scsi_status,
 285                         be32_to_cpu(fcprsp->rspResId),
 286                         be32_to_cpu(fcprsp->rspSnsLen),
 287                         be32_to_cpu(fcprsp->rspRspLen),
 288                         fcprsp->rspInfo3);
 289
 290         if (resp_info & RSP_LEN_VALID) {
 291                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 292                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 293                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 294                         host_status = DID_ERROR;
 295                         goto out;
 296                 }
 297         }
 298
 299         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 300                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 301                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 302                         snslen = SCSI_SENSE_BUFFERSIZE;
 303
 304                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 305         }
 306
 307         cmnd->resid = 0;
 308         if (resp_info & RESID_UNDER) {
 309                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 310
 311                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 312                                 "%d:0716 FCP Read Underrun, expected %d, "
 313                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 314                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 315                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 316
 317                 /*
 318                  * The cmnd->underflow is the minimum number of bytes that must
 319                  * be transfered for this command.  Provided a sense condition
 320                  * is not present, make sure the actual amount transferred is at
 321                  * least the underflow value or fail.
 322                  */
 323                 if (!(resp_info & SNS_LEN_VALID) &&
 324                     (scsi_status == SAM_STAT_GOOD) &&
 325                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 326                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 327                                         "%d:0717 FCP command x%x residual "
 328                                         "underrun converted to error "
 329                                         "Data: x%x x%x x%x\n", phba->brd_no,
 330                                         cmnd->cmnd[0], cmnd->request_bufflen,
 331                                         cmnd->resid, cmnd->underflow);
 332
 333                         host_status = DID_ERROR;
 334                 }
 335         } else if (resp_info & RESID_OVER) {
 336                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 337                                 "%d:0720 FCP command x%x residual "
 338                                 "overrun error. Data: x%x x%x \n",
 339                                 phba->brd_no, cmnd->cmnd[0],
 340                                 cmnd->request_bufflen, cmnd->resid);
 341                 host_status = DID_ERROR;
 342
 343         /*
 344          * Check SLI validation that all the transfer was actually done
 345          * (fcpi_parm should be zero). Apply check only to reads.
 346          */
 347         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 348                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 349                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 350                         "%d:0734 FCP Read Check Error Data: "
 351                         "x%x x%x x%x x%x\n", phba->brd_no,
 352                         be32_to_cpu(fcpcmd->fcpDl),
 353                         be32_to_cpu(fcprsp->rspResId),
 354                         fcpi_parm, cmnd->cmnd[0]);
 355                 host_status = DID_ERROR;
 356                 cmnd->resid = cmnd->request_bufflen;
 357         }
 358
 359  out:
 360         cmnd->result = ScsiResult(host_status, scsi_status);
 361 }
 362
 363 static void
 364 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 365                         struct lpfc_iocbq *pIocbOut)
 366 {
 367         struct lpfc_scsi_buf *lpfc_cmd =
 368                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 369         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 370         struct lpfc_nodelist *pnode = rdata->pnode;
 371         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 372         unsigned long iflag;
 373
 374         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 375         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 376
 377         if (lpfc_cmd->status) {
 378                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 379                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 380                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 381                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 382                         lpfc_cmd->status = IOSTAT_DEFAULT;
 383
 384                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 385                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 386                                 "x%x result: x%x Data: x%x x%x\n",
 387                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 388                                 cmd->device->lun, lpfc_cmd->status,
 389                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 390                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 391
 392                 switch (lpfc_cmd->status) {
 393                 case IOSTAT_FCP_RSP_ERROR:
 394                         /* Call FCP RSP handler to determine result */
 395                         lpfc_handle_fcp_err(lpfc_cmd);
 396                         break;
 397                 case IOSTAT_NPORT_BSY:
 398                 case IOSTAT_FABRIC_BSY:
 399                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 400                         break;
 401                 default:
 402                         cmd->result = ScsiResult(DID_ERROR, 0);
 403                         break;
 404                 }
 405
 406                 if (pnode) {
 407                         if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
 408                                 cmd->result = ScsiResult(DID_BUS_BUSY,
 409                                         SAM_STAT_BUSY);
 410                 }
 411                 else {
 412                         cmd->result = ScsiResult(DID_NO_CONNECT, 0);
 413                 }
 414         } else {
 415                 cmd->result = ScsiResult(DID_OK, 0);
 416         }
 417
 418         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 419                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 420
 421                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 422                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 423                                 "SNS x%x x%x Data: x%x x%x\n",
 424                                 phba->brd_no, cmd->device->id,
 425                                 cmd->device->lun, cmd, cmd->result,
 426                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 427         }
 428
 429         spin_lock_irqsave(phba->host->host_lock, iflag);
 430         lpfc_free_scsi_buf(lpfc_cmd);
 431         cmd->host_scribble = NULL;
 432         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 433
 434         cmd->scsi_done(cmd);
 435 }
 436
 437 static void
 438 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 439                         struct lpfc_nodelist *pnode)
 440 {
 441         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 442         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 443         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 444         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 445         int datadir = scsi_cmnd->sc_data_direction;
 446
 447         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 448
 449         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 450
 451         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 452
 453         if (scsi_cmnd->device->tagged_supported) {
 454                 switch (scsi_cmnd->tag) {
 455                 case HEAD_OF_QUEUE_TAG:
 456                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 457                         break;
 458                 case ORDERED_QUEUE_TAG:
 459                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 460                         break;
 461                 default:
 462                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 463                         break;
 464                 }
 465         } else
 466                 fcp_cmnd->fcpCntl1 = 0;
 467
 468         /*
 469          * There are three possibilities here - use scatter-gather segment, use
 470          * the single mapping, or neither.  Start the lpfc command prep by
 471          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 472          * data bde entry.
 473          */
 474         if (scsi_cmnd->use_sg) {
 475                 if (datadir == DMA_TO_DEVICE) {
 476                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 477                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 478                         iocb_cmd->ulpPU = 0;
 479                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 480                         phba->fc4OutputRequests++;
 481                 } else {
 482                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 483                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 484                         iocb_cmd->un.fcpi.fcpi_parm =
 485                                 scsi_cmnd->request_bufflen;
 486                         fcp_cmnd->fcpCntl3 = READ_DATA;
 487                         phba->fc4InputRequests++;
 488                 }
 489         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 490                 if (datadir == DMA_TO_DEVICE) {
 491                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 492                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 493                         iocb_cmd->ulpPU = 0;
 494                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 495                         phba->fc4OutputRequests++;
 496                 } else {
 497                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 498                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 499                         iocb_cmd->un.fcpi.fcpi_parm =
 500                                 scsi_cmnd->request_bufflen;
 501                         fcp_cmnd->fcpCntl3 = READ_DATA;
 502                         phba->fc4InputRequests++;
 503                 }
 504         } else {
 505                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 506                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 507                 iocb_cmd->ulpPU = 0;
 508                 fcp_cmnd->fcpCntl3 = 0;
 509                 phba->fc4ControlRequests++;
 510         }
 511
 512         /*
 513          * Finish initializing those IOCB fields that are independent
 514          * of the scsi_cmnd request_buffer
 515          */
 516         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 517         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 518                 piocbq->iocb.ulpFCP2Rcvy = 1;
 519
 520         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 521         piocbq->context1  = lpfc_cmd;
 522         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 523         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 524 }
 525
 526 static int
 527 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 528                              struct lpfc_scsi_buf *lpfc_cmd,
 529                              uint8_t task_mgmt_cmd)
 530 {
 531         struct lpfc_sli *psli;
 532         struct lpfc_iocbq *piocbq;
 533         IOCB_t *piocb;
 534         struct fcp_cmnd *fcp_cmnd;
 535         struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
 536         struct lpfc_rport_data *rdata = scsi_dev->hostdata;
 537         struct lpfc_nodelist *ndlp = rdata->pnode;
 538
 539         if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 540                 return 0;
 541         }
 542
 543         psli = &phba->sli;
 544         piocbq = &(lpfc_cmd->cur_iocbq);
 545         piocb = &piocbq->iocb;
 546
 547         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 548         lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
 549         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 550
 551         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 552
 553         piocb->ulpContext = ndlp->nlp_rpi;
 554         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 555                 piocb->ulpFCP2Rcvy = 1;
 556         }
 557         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 558
 559         /* ulpTimeout is only one byte */
 560         if (lpfc_cmd->timeout > 0xff) {
 561                 /*
 562                  * Do not timeout the command at the firmware level.
 563                  * The driver will provide the timeout mechanism.
 564                  */
 565                 piocb->ulpTimeout = 0;
 566         } else {
 567                 piocb->ulpTimeout = lpfc_cmd->timeout;
 568         }
 569
 570         lpfc_cmd->rdata = rdata;
 571
 572         switch (task_mgmt_cmd) {
 573         case FCP_LUN_RESET:
 574                 /* Issue LUN Reset to TGT <num> LUN <num> */
 575                 lpfc_printf_log(phba,
 576                                 KERN_INFO,
 577                                 LOG_FCP,
 578                                 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
 579                                 "Data: x%x x%x\n",
 580                                 phba->brd_no,
 581                                 scsi_dev->id, scsi_dev->lun,
 582                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 583
 584                 break;
 585         case FCP_ABORT_TASK_SET:
 586                 /* Issue Abort Task Set to TGT <num> LUN <num> */
 587                 lpfc_printf_log(phba,
 588                                 KERN_INFO,
 589                                 LOG_FCP,
 590                                 "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
 591                                 "Data: x%x x%x\n",
 592                                 phba->brd_no,
 593                                 scsi_dev->id, scsi_dev->lun,
 594                                 ndlp->nlp_rpi, ndlp->nlp_flag);
 595
 596                 break;
 597         case FCP_TARGET_RESET:
 598                 /* Issue Target Reset to TGT <num> */
 599                 lpfc_printf_log(phba,
 600                                 KERN_INFO,
 601                                 LOG_FCP,
 602                                 "%d:0702 Issue Target Reset to TGT %d "
 603                                 "Data: x%x x%x\n",
 604                                 phba->brd_no,
 605                                 scsi_dev->id, ndlp->nlp_rpi,
 606                                 ndlp->nlp_flag);
 607                 break;
 608         }
 609
 610         return (1);
 611 }
 612
 613 static int
 614 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
 615 {
 616         struct lpfc_iocbq *iocbq;
 617         struct lpfc_iocbq *iocbqrsp = NULL;
 618         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 619         int ret;
 620
 621         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
 622         if (!ret)
 623                 return FAILED;
 624
 625         lpfc_cmd->scsi_hba = phba;
 626         iocbq = &lpfc_cmd->cur_iocbq;
 627         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 628         if (!iocbqrsp)
 629                 return FAILED;
 630         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 631
 632         iocbq->iocb_flag |= LPFC_IO_POLL;
 633         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 634                      &phba->sli.ring[phba->sli.fcp_ring],
 635                      iocbq, SLI_IOCB_HIGH_PRIORITY,
 636                      iocbqrsp,
 637                      lpfc_cmd->timeout);
 638         if (ret != IOCB_SUCCESS) {
 639                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 640                 ret = FAILED;
 641         } else {
 642                 ret = SUCCESS;
 643                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 644                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 645                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 646                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 647                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 648         }
 649
 650         /*
 651          * All outstanding txcmplq I/Os should have been aborted by the target.
 652          * Unfortunately, some targets do not abide by this forcing the driver
 653          * to double check.
 654          */
 655         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
 656                             lpfc_cmd->pCmd->device->id,
 657                             lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
 658
 659         /* Return response IOCB to free list. */
 660         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
 661         return ret;
 662 }
 663
 664 static void
 665 lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 666                             struct lpfc_iocbq *pIocbOut)
 667 {
 668         unsigned long iflag;
 669         struct lpfc_scsi_buf *lpfc_cmd =
 670                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 671
 672         spin_lock_irqsave(phba->host->host_lock, iflag);
 673         lpfc_free_scsi_buf(lpfc_cmd);
 674         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 675 }
 676
 677 static void
 678 lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
 679                                 struct lpfc_iocbq *pIocbIn,
 680                                 struct lpfc_iocbq *pIocbOut)
 681 {
 682         struct scsi_cmnd *ml_cmd =
 683                 ((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
 684
 685         lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
 686         ml_cmd->host_scribble = NULL;
 687 }
 688
 689 const char *
 690 lpfc_info(struct Scsi_Host *host)
 691 {
 692         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
 693         int len;
 694         static char  lpfcinfobuf[384];
 695
 696         memset(lpfcinfobuf,0,384);
 697         if (phba && phba->pcidev){
 698                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 699                 len = strlen(lpfcinfobuf);
 700                 snprintf(lpfcinfobuf + len,
 701                         384-len,
 702                         " on PCI bus %02x device %02x irq %d",
 703                         phba->pcidev->bus->number,
 704                         phba->pcidev->devfn,
 705                         phba->pcidev->irq);
 706                 len = strlen(lpfcinfobuf);
 707                 if (phba->Port[0]) {
 708                         snprintf(lpfcinfobuf + len,
 709                                  384-len,
 710                                  " port %s",
 711                                  phba->Port);
 712                 }
 713         }
 714         return lpfcinfobuf;
 715 }
 716
 717 static int
 718 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 719 {
 720         struct lpfc_hba *phba =
 721                 (struct lpfc_hba *) cmnd->device->host->hostdata[0];
 722         struct lpfc_sli *psli = &phba->sli;
 723         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 724         struct lpfc_nodelist *ndlp = rdata->pnode;
 725         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 726         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 727         int err = 0;
 728
 729         /*
 730          * The target pointer is guaranteed not to be NULL because the driver
 731          * only clears the device->hostdata field in lpfc_slave_destroy.  This
 732          * approach guarantees no further IO calls on this target.
 733          */
 734         if (!ndlp) {
 735                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 736                 goto out_fail_command;
 737         }
 738
 739         /*
 740          * A Fibre Channel target is present and functioning only when the node
 741          * state is MAPPED.  Any other state is a failure.
 742          */
 743         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
 744                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
 745                     (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
 746                         cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
 747                         goto out_fail_command;
 748                 }
 749                 /*
 750                  * The device is most likely recovered and the driver
 751                  * needs a bit more time to finish.  Ask the midlayer
 752                  * to retry.
 753                  */
 754                 goto out_host_busy;
 755         }
 756
 757         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 758         if (lpfc_cmd == NULL) {
 759                 printk(KERN_WARNING "%s: No buffer available - list empty, "
 760                        "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
 761                 goto out_host_busy;
 762         }
 763
 764         /*
 765          * Store the midlayer's command structure for the completion phase
 766          * and complete the command initialization.
 767          */
 768         lpfc_cmd->pCmd  = cmnd;
 769         lpfc_cmd->rdata = rdata;
 770         lpfc_cmd->timeout = 0;
 771         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 772         cmnd->scsi_done = done;
 773
 774         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 775         if (err)
 776                 goto out_host_busy_free_buf;
 777
 778         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 779
 780         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 781                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 782         if (err)
 783                 goto out_host_busy_free_buf;
 784         return 0;
 785
 786  out_host_busy_free_buf:
 787         lpfc_free_scsi_buf(lpfc_cmd);
 788         cmnd->host_scribble = NULL;
 789  out_host_busy:
 790         return SCSI_MLQUEUE_HOST_BUSY;
 791
 792  out_fail_command:
 793         done(cmnd);
 794         return 0;
 795 }
 796
 797 static int
 798 __lpfc_abort_handler(struct scsi_cmnd *cmnd)
 799 {
 800         struct lpfc_hba *phba =
 801                         (struct lpfc_hba *)cmnd->device->host->hostdata[0];
 802         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 803         struct lpfc_iocbq *iocb, *next_iocb;
 804         struct lpfc_iocbq *abtsiocb = NULL;
 805         struct lpfc_scsi_buf *lpfc_cmd;
 806         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 807         IOCB_t *cmd, *icmd;
 808         unsigned long snum;
 809         unsigned int id, lun;
 810         unsigned int loop_count = 0;
 811         int ret = IOCB_SUCCESS;
 812
 813         /*
 814          * If the host_scribble data area is NULL, then the driver has already
 815          * completed this command, but the midlayer did not see the completion
 816          * before the eh fired.  Just return SUCCESS.
 817          */
 818         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 819         if (!lpfc_cmd)
 820                 return SUCCESS;
 821
 822         /* save these now since lpfc_cmd can be freed */
 823         id   = lpfc_cmd->pCmd->device->id;
 824         lun  = lpfc_cmd->pCmd->device->lun;
 825         snum = lpfc_cmd->pCmd->serial_number;
 826
 827         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 828                 cmd = &iocb->iocb;
 829                 if (iocb->context1 != lpfc_cmd)
 830                         continue;
 831
 832                 list_del_init(&iocb->list);
 833                 pring->txq_cnt--;
 834                 if (!iocb->iocb_cmpl) {
 835                         list_add_tail(&iocb->list, lpfc_iocb_list);
 836                 }
 837                 else {
 838                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 839                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 840                         lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
 841                 }
 842
 843                 goto out;
 844         }
 845
 846         list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
 847         if (abtsiocb == NULL)
 848                 return FAILED;
 849
 850         memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
 851
 852         /*
 853          * The scsi command was not in the txq.  Check the txcmplq and if it is
 854          * found, send an abort to the FW.
 855          */
 856         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 857                 if (iocb->context1 != lpfc_cmd)
 858                         continue;
 859
 860                 iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
 861                 cmd = &iocb->iocb;
 862                 icmd = &abtsiocb->iocb;
 863                 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 864                 icmd->un.acxri.abortContextTag = cmd->ulpContext;
 865                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 866
 867                 icmd->ulpLe = 1;
 868                 icmd->ulpClass = cmd->ulpClass;
 869                 if (phba->hba_state >= LPFC_LINK_UP)
 870                         icmd->ulpCommand = CMD_ABORT_XRI_CN;
 871                 else
 872                         icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 873
 874                 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 875                 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
 876                                                                 IOCB_ERROR) {
 877                         list_add_tail(&abtsiocb->list, lpfc_iocb_list);
 878                         ret = IOCB_ERROR;
 879                         break;
 880                 }
 881
 882                 /* Wait for abort to complete */
 883                 while (cmnd->host_scribble)
 884                 {
 885                         spin_unlock_irq(phba->host->host_lock);
 886                         set_current_state(TASK_UNINTERRUPTIBLE);
 887                         schedule_timeout(LPFC_ABORT_WAIT*HZ);
 888                         spin_lock_irq(phba->host->host_lock);
 889                         if (++loop_count
 890                             > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
 891                                 break;
 892                 }
 893
 894                 if(cmnd->host_scribble) {
 895                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 896                                         "%d:0748 abort handler timed "
 897                                         "out waiting for abort to "
 898                                         "complete. Data: "
 899                                         "x%x x%x x%x x%lx\n",
 900                                         phba->brd_no, ret, id, lun, snum);
 901                         cmnd->host_scribble = NULL;
 902                         iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
 903                         ret = IOCB_ERROR;
 904                 }
 905
 906                 break;
 907         }
 908
 909  out:
 910         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 911                         "%d:0749 SCSI layer issued abort device "
 912                         "Data: x%x x%x x%x x%lx\n",
 913                         phba->brd_no, ret, id, lun, snum);
 914
 915         return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
 916 }
 917
 918 static int
 919 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 920 {
 921         int rc;
 922         spin_lock_irq(cmnd->device->host->host_lock);
 923         rc = __lpfc_abort_handler(cmnd);
 924         spin_unlock_irq(cmnd->device->host->host_lock);
 925         return rc;
 926 }
 927
 928 static int
 929 __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 930 {
 931         struct Scsi_Host *shost = cmnd->device->host;
 932         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
 933         struct lpfc_sli *psli = &phba->sli;
 934         struct lpfc_scsi_buf *lpfc_cmd = NULL;
 935         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 936         struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
 937         struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
 938         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 939         struct lpfc_nodelist *pnode = rdata->pnode;
 940         int ret = FAILED;
 941         int cnt, loopcnt;
 942
 943         /*
 944          * If target is not in a MAPPED state, delay the reset until
 945          * target is rediscovered or nodev timeout expires.
 946          */
 947         while ( 1 ) {
 948                 if (!pnode)
 949                         break;
 950
 951                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
 952                         spin_unlock_irq(phba->host->host_lock);
 953                         set_current_state(TASK_UNINTERRUPTIBLE);
 954                         schedule_timeout( HZ/2);
 955                         spin_lock_irq(phba->host->host_lock);
 956                 }
 957                 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
 958                         break;
 959         }
 960
 961         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 962         if (lpfc_cmd == NULL)
 963                 goto out;
 964
 965         lpfc_cmd->pCmd = cmnd;
 966         lpfc_cmd->timeout = 60;
 967         lpfc_cmd->scsi_hba = phba;
 968
 969         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
 970         if (!ret)
 971                 goto out_free_scsi_buf;
 972
 973         iocbq = &lpfc_cmd->cur_iocbq;
 974
 975         /* get a buffer for this IOCB command response */
 976         list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
 977         if (iocbqrsp == NULL)
 978                 goto out_free_scsi_buf;
 979
 980         memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
 981
 982         iocbq->iocb_flag |= LPFC_IO_POLL;
 983         iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
 984
 985         ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
 986                      &phba->sli.ring[psli->fcp_ring],
 987                      iocbq, 0, iocbqrsp, 60);
 988         if (ret == IOCB_SUCCESS)
 989                 ret = SUCCESS;
 990
 991         lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 992         lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 993         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
 994                 if (lpfc_cmd->result & IOERR_DRVR_MASK)
 995                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 996
 997         /*
 998          * All outstanding txcmplq I/Os should have been aborted by the target.
 999          * Unfortunately, some targets do not abide by this forcing the driver
1000          * to double check.
1001          */
1002         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1003                             cmnd->device->id, cmnd->device->lun, 0,
1004                             LPFC_CTX_LUN);
1005
1006         loopcnt = 0;
1007         while((cnt = lpfc_sli_sum_iocb(phba,
1008                                        &phba->sli.ring[phba->sli.fcp_ring],
1009                                        cmnd->device->id, cmnd->device->lun,
1010                                        LPFC_CTX_LUN))) {
1011                 spin_unlock_irq(phba->host->host_lock);
1012                 set_current_state(TASK_UNINTERRUPTIBLE);
1013                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1014                 spin_lock_irq(phba->host->host_lock);
1015
1016                 if (++loopcnt
1017                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1018                         break;
1019         }
1020
1021         if (cnt) {
1022                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1023                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1024                         phba->brd_no, cnt);
1025         }
1026
1027         list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
1028
1029 out_free_scsi_buf:
1030         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1031                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1032                         "Data: x%x x%x x%x\n",
1033                         phba->brd_no, lpfc_cmd->pCmd->device->id,
1034                         lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
1035                         lpfc_cmd->result);
1036         lpfc_free_scsi_buf(lpfc_cmd);
1037 out:
1038         return ret;
1039 }
1040
1041 static int
1042 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
1043 {
1044         int rc;
1045         spin_lock_irq(cmnd->device->host->host_lock);
1046         rc = __lpfc_reset_lun_handler(cmnd);
1047         spin_unlock_irq(cmnd->device->host->host_lock);
1048         return rc;
1049 }
1050
1051 /*
1052  * Note: midlayer calls this function with the host_lock held
1053  */
1054 static int
1055 __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1056 {
1057         struct Scsi_Host *shost = cmnd->device->host;
1058         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
1059         struct lpfc_nodelist *ndlp = NULL;
1060         int match;
1061         int ret = FAILED, i, err_count = 0;
1062         int cnt, loopcnt;
1063         unsigned int midlayer_id = 0;
1064         struct lpfc_scsi_buf * lpfc_cmd = NULL;
1065         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
1066
1067         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1068         if (lpfc_cmd == NULL)
1069                 goto out;
1070
1071         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1072         lpfc_cmd->timeout = 60;
1073         lpfc_cmd->pCmd = cmnd;
1074         lpfc_cmd->scsi_hba = phba;
1075
1076         /*
1077          * Since the driver manages a single bus device, reset all
1078          * targets known to the driver.  Should any target reset
1079          * fail, this routine returns failure to the midlayer.
1080          */
1081         midlayer_id = cmnd->device->id;
1082         for (i = 0; i < MAX_FCP_TARGET; i++) {
1083                 /* Search the mapped list for this target ID */
1084                 match = 0;
1085                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1086                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1087                                 match = 1;
1088                                 break;
1089                         }
1090                 }
1091                 if (!match)
1092                         continue;
1093
1094                 lpfc_cmd->pCmd->device->id = i;
1095                 lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
1096                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
1097                 if (ret != SUCCESS) {
1098                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1099                                 "%d:0713 Bus Reset on target %d failed\n",
1100                                 phba->brd_no, i);
1101                         err_count++;
1102                 }
1103         }
1104
1105         cmnd->device->id = midlayer_id;
1106         loopcnt = 0;
1107         while((cnt = lpfc_sli_sum_iocb(phba,
1108                                 &phba->sli.ring[phba->sli.fcp_ring],
1109                                 0, 0, LPFC_CTX_HOST))) {
1110                 spin_unlock_irq(phba->host->host_lock);
1111                 set_current_state(TASK_UNINTERRUPTIBLE);
1112                 schedule_timeout(LPFC_RESET_WAIT*HZ);
1113                 spin_lock_irq(phba->host->host_lock);
1114
1115                 if (++loopcnt
1116                     > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
1117                         break;
1118         }
1119
1120         if (cnt) {
1121                 /* flush all outstanding commands on the host */
1122                 i = lpfc_sli_abort_iocb(phba,
1123                                 &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
1124                                 LPFC_CTX_HOST);
1125
1126                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1127                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1128                    phba->brd_no, cnt, i);
1129         }
1130
1131         if (!err_count)
1132                 ret = SUCCESS;
1133
1134         lpfc_free_scsi_buf(lpfc_cmd);
1135         lpfc_printf_log(phba,
1136                         KERN_ERR,
1137                         LOG_FCP,
1138                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1139                         phba->brd_no, ret);
1140 out:
1141         return ret;
1142 }
1143
1144 static int
1145 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1146 {
1147         int rc;
1148         spin_lock_irq(cmnd->device->host->host_lock);
1149         rc = __lpfc_reset_bus_handler(cmnd);
1150         spin_unlock_irq(cmnd->device->host->host_lock);
1151         return rc;
1152 }
1153
1154 static int
1155 lpfc_slave_alloc(struct scsi_device *sdev)
1156 {
1157         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
1158         struct lpfc_nodelist *ndlp = NULL;
1159         int match = 0;
1160         struct lpfc_scsi_buf *scsi_buf = NULL;
1161         uint32_t total = 0, i;
1162         uint32_t num_to_alloc = 0;
1163         unsigned long flags;
1164         struct list_head *listp;
1165         struct list_head *node_list[6];
1166
1167         /*
1168          * Store the target pointer in the scsi_device hostdata pointer provided
1169          * the driver has already discovered the target id.
1170          */
1171
1172         /* Search the nlp lists other than unmap_list for this target ID */
1173         node_list[0] = &phba->fc_npr_list;
1174         node_list[1] = &phba->fc_nlpmap_list;
1175         node_list[2] = &phba->fc_prli_list;
1176         node_list[3] = &phba->fc_reglogin_list;
1177         node_list[4] = &phba->fc_adisc_list;
1178         node_list[5] = &phba->fc_plogi_list;
1179
1180         for (i = 0; i < 6 && !match; i++) {
1181                 listp = node_list[i];
1182                 if (list_empty(listp))
1183                         continue;
1184                 list_for_each_entry(ndlp, listp, nlp_listp) {
1185                         if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
1186                                 match = 1;
1187                                 break;
1188                         }
1189                 }
1190         }
1191
1192         if (!match)
1193                 return -ENXIO;
1194
1195         sdev->hostdata = ndlp->rport->dd_data;
1196
1197         /*
1198          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1199          * available list of scsi buffers.  Don't allocate more than the
1200          * HBA limit conveyed to the midlayer via the host structure.  Note
1201          * that this list of scsi bufs exists for the lifetime of the driver.
1202          */
1203         total = phba->total_scsi_bufs;
1204         num_to_alloc = LPFC_CMD_PER_LUN;
1205         if (total >= phba->cfg_hba_queue_depth) {
1206                 printk(KERN_WARNING "%s, At config limitation of "
1207                        "%d allocated scsi_bufs\n", __FUNCTION__, total);
1208                 return 0;
1209         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1210                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1211         }
1212
1213         for (i = 0; i < num_to_alloc; i++) {
1214                 scsi_buf = lpfc_get_scsi_buf(phba);
1215                 if (!scsi_buf) {
1216                         printk(KERN_ERR "%s, failed to allocate "
1217                                "scsi_buf\n", __FUNCTION__);
1218                         break;
1219                 }
1220
1221                 spin_lock_irqsave(phba->host->host_lock, flags);
1222                 phba->total_scsi_bufs++;
1223                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1224                 spin_unlock_irqrestore(phba->host->host_lock, flags);
1225         }
1226         return 0;
1227 }
1228
1229 static int
1230 lpfc_slave_configure(struct scsi_device *sdev)
1231 {
1232         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
1233         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1234
1235         if (sdev->tagged_supported)
1236                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1237         else
1238                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1239
1240         /*
1241          * Initialize the fc transport attributes for the target
1242          * containing this scsi device.  Also note that the driver's
1243          * target pointer is stored in the starget_data for the
1244          * driver's sysfs entry point functions.
1245          */
1246         rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
1247
1248         return 0;
1249 }
1250
1251 static void
1252 lpfc_slave_destroy(struct scsi_device *sdev)
1253 {
1254         sdev->hostdata = NULL;
1255         return;
1256 }
1257
1258 struct scsi_host_template lpfc_template = {
1259         .module                 = THIS_MODULE,
1260         .name                   = LPFC_DRIVER_NAME,
1261         .info                   = lpfc_info,
1262         .queuecommand           = lpfc_queuecommand,
1263         .eh_abort_handler       = lpfc_abort_handler,
1264         .eh_device_reset_handler= lpfc_reset_lun_handler,
1265         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1266         .slave_alloc            = lpfc_slave_alloc,
1267         .slave_configure        = lpfc_slave_configure,
1268         .slave_destroy          = lpfc_slave_destroy,
1269         .this_id                = -1,
1270         .sg_tablesize           = LPFC_SG_SEG_CNT,
1271         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1272         .use_clustering         = ENABLE_CLUSTERING,
1273         .shost_attrs            = lpfc_host_attrs,
1274         .max_sectors            = 0xFFFF,
1275 };