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) 2004-2006 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 #include <linux/delay.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_version.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_disc.h"
  36 #include "lpfc_scsi.h"
  37 #include "lpfc.h"
  38 #include "lpfc_logmsg.h"
  39 #include "lpfc_crtn.h"
  40
  41 #define LPFC_RESET_WAIT  2
  42 #define LPFC_ABORT_WAIT  2
  43
  44
  45 /*
  46  * This routine allocates a scsi buffer, which contains all the necessary
  47  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
  48  * contains information to build the IOCB.  The DMAable region contains
  49  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
  50  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
  51  * and the BPL BDE is setup in the IOCB.
  52  */
  53 static struct lpfc_scsi_buf *
  54 lpfc_new_scsi_buf(struct lpfc_hba * phba)
  55 {
  56         struct lpfc_scsi_buf *psb;
  57         struct ulp_bde64 *bpl;
  58         IOCB_t *iocb;
  59         dma_addr_t pdma_phys;
  60         uint16_t iotag;
  61
  62         psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
  63         if (!psb)
  64                 return NULL;
  65         memset(psb, 0, sizeof (struct lpfc_scsi_buf));
  66         psb->scsi_hba = phba;
  67
  68         /*
  69          * Get memory from the pci pool to map the virt space to pci bus space
  70          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
  71          * struct fcp_rsp and the number of bde's necessary to support the
  72          * sg_tablesize.
  73          */
  74         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
  75                                                         &psb->dma_handle);
  76         if (!psb->data) {
  77                 kfree(psb);
  78                 return NULL;
  79         }
  80
  81         /* Initialize virtual ptrs to dma_buf region. */
  82         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
  83
  84         /* Allocate iotag for psb->cur_iocbq. */
  85         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
  86         if (iotag == 0) {
  87                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
  88                               psb->data, psb->dma_handle);
  89                 kfree (psb);
  90                 return NULL;
  91         }
  92         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
  93
  94         psb->fcp_cmnd = psb->data;
  95         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
  96         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
  97                                                         sizeof(struct fcp_rsp);
  98
  99         /* Initialize local short-hand pointers. */
 100         bpl = psb->fcp_bpl;
 101         pdma_phys = psb->dma_handle;
 102
 103         /*
 104          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 105          * list bdes.  Initialize the first two and leave the rest for
 106          * queuecommand.
 107          */
 108         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 109         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 110         bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
 111         bpl->tus.f.bdeFlags = BUFF_USE_CMND;
 112         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 113         bpl++;
 114
 115         /* Setup the physical region for the FCP RSP */
 116         pdma_phys += sizeof (struct fcp_cmnd);
 117         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
 118         bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
 119         bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
 120         bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
 121         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 122
 123         /*
 124          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 125          * initialize it with all known data now.
 126          */
 127         pdma_phys += (sizeof (struct fcp_rsp));
 128         iocb = &psb->cur_iocbq.iocb;
 129         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 130         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
 131         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
 132         iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 133         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
 134         iocb->ulpBdeCount = 1;
 135         iocb->ulpClass = CLASS3;
 136
 137         return psb;
 138 }
 139
 140 static struct lpfc_scsi_buf*
 141 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 142 {
 143         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 144         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 145         unsigned long iflag = 0;
 146
 147         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 148         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 149         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 150         return  lpfc_cmd;
 151 }
 152
 153 static void
 154 lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 155 {
 156         unsigned long iflag = 0;
 157
 158         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 159         psb->pCmd = NULL;
 160         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 161         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 162 }
 163
 164 static int
 165 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 166 {
 167         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 168         struct scatterlist *sgel = NULL;
 169         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 170         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 171         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 172         dma_addr_t physaddr;
 173         uint32_t i, num_bde = 0;
 174         int datadir = scsi_cmnd->sc_data_direction;
 175         int dma_error;
 176
 177         /*
 178          * There are three possibilities here - use scatter-gather segment, use
 179          * the single mapping, or neither.  Start the lpfc command prep by
 180          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 181          * data bde entry.
 182          */
 183         bpl += 2;
 184         if (scsi_cmnd->use_sg) {
 185                 /*
 186                  * The driver stores the segment count returned from pci_map_sg
 187                  * because this a count of dma-mappings used to map the use_sg
 188                  * pages.  They are not guaranteed to be the same for those
 189                  * architectures that implement an IOMMU.
 190                  */
 191                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 192                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 193                                                 scsi_cmnd->use_sg, datadir);
 194                 if (lpfc_cmd->seg_cnt == 0)
 195                         return 1;
 196
 197                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 198                         printk(KERN_ERR "%s: Too many sg segments from "
 199                                "dma_map_sg.  Config %d, seg_cnt %d",
 200                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 201                                lpfc_cmd->seg_cnt);
 202                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 203                                      lpfc_cmd->seg_cnt, datadir);
 204                         return 1;
 205                 }
 206
 207                 /*
 208                  * The driver established a maximum scatter-gather segment count
 209                  * during probe that limits the number of sg elements in any
 210                  * single scsi command.  Just run through the seg_cnt and format
 211                  * the bde's.
 212                  */
 213                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 214                         physaddr = sg_dma_address(sgel);
 215                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 216                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 217                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 218                         if (datadir == DMA_TO_DEVICE)
 219                                 bpl->tus.f.bdeFlags = 0;
 220                         else
 221                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 222                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 223                         bpl++;
 224                         sgel++;
 225                         num_bde++;
 226                 }
 227         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 228                 physaddr = dma_map_single(&phba->pcidev->dev,
 229                                           scsi_cmnd->request_buffer,
 230                                           scsi_cmnd->request_bufflen,
 231                                           datadir);
 232                 dma_error = dma_mapping_error(physaddr);
 233                 if (dma_error) {
 234                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 235                                 "%d:0718 Unable to dma_map_single "
 236                                 "request_buffer: x%x\n",
 237                                 phba->brd_no, dma_error);
 238                         return 1;
 239                 }
 240
 241                 lpfc_cmd->nonsg_phys = physaddr;
 242                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 243                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 244                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 245                 if (datadir == DMA_TO_DEVICE)
 246                         bpl->tus.f.bdeFlags = 0;
 247                 else
 248                         bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 249                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 250                 num_bde = 1;
 251                 bpl++;
 252         }
 253
 254         /*
 255          * Finish initializing those IOCB fields that are dependent on the
 256          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 257          * reinitialized since all iocb memory resources are used many times
 258          * for transmit, receive, and continuation bpl's.
 259          */
 260         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 261         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 262                 (num_bde * sizeof (struct ulp_bde64));
 263         iocb_cmd->ulpBdeCount = 1;
 264         iocb_cmd->ulpLe = 1;
 265         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 266         return 0;
 267 }
 268
 269 static void
 270 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 271 {
 272         /*
 273          * There are only two special cases to consider.  (1) the scsi command
 274          * requested scatter-gather usage or (2) the scsi command allocated
 275          * a request buffer, but did not request use_sg.  There is a third
 276          * case, but it does not require resource deallocation.
 277          */
 278         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 279                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 280                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 281         } else {
 282                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 283                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 284                                                 psb->pCmd->request_bufflen,
 285                                                 psb->pCmd->sc_data_direction);
 286                  }
 287         }
 288 }
 289
 290 static void
 291 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 292 {
 293         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 294         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 295         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 296         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 297         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 298         uint32_t resp_info = fcprsp->rspStatus2;
 299         uint32_t scsi_status = fcprsp->rspStatus3;
 300         uint32_t *lp;
 301         uint32_t host_status = DID_OK;
 302         uint32_t rsplen = 0;
 303         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 304
 305         /*
 306          *  If this is a task management command, there is no
 307          *  scsi packet associated with this lpfc_cmd.  The driver
 308          *  consumes it.
 309          */
 310         if (fcpcmd->fcpCntl2) {
 311                 scsi_status = 0;
 312                 goto out;
 313         }
 314
 315         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 316                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 317                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 318                         snslen = SCSI_SENSE_BUFFERSIZE;
 319
 320                 if (resp_info & RSP_LEN_VALID)
 321                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 322                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 323         }
 324         lp = (uint32_t *)cmnd->sense_buffer;
 325
 326         if (!scsi_status && (resp_info & RESID_UNDER))
 327                 logit = LOG_FCP;
 328
 329         lpfc_printf_log(phba, KERN_WARNING, logit,
 330                         "%d:0730 FCP command x%x failed: x%x SNS x%x x%x "
 331                         "Data: x%x x%x x%x x%x x%x\n",
 332                         phba->brd_no, cmnd->cmnd[0], scsi_status,
 333                         be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 334                         be32_to_cpu(fcprsp->rspResId),
 335                         be32_to_cpu(fcprsp->rspSnsLen),
 336                         be32_to_cpu(fcprsp->rspRspLen),
 337                         fcprsp->rspInfo3);
 338
 339         if (resp_info & RSP_LEN_VALID) {
 340                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 341                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 342                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 343                         host_status = DID_ERROR;
 344                         goto out;
 345                 }
 346         }
 347
 348         cmnd->resid = 0;
 349         if (resp_info & RESID_UNDER) {
 350                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 351
 352                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 353                                 "%d:0716 FCP Read Underrun, expected %d, "
 354                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 355                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 356                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 357
 358                 /*
 359                  * The cmnd->underflow is the minimum number of bytes that must
 360                  * be transfered for this command.  Provided a sense condition
 361                  * is not present, make sure the actual amount transferred is at
 362                  * least the underflow value or fail.
 363                  */
 364                 if (!(resp_info & SNS_LEN_VALID) &&
 365                     (scsi_status == SAM_STAT_GOOD) &&
 366                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 367                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 368                                         "%d:0717 FCP command x%x residual "
 369                                         "underrun converted to error "
 370                                         "Data: x%x x%x x%x\n", phba->brd_no,
 371                                         cmnd->cmnd[0], cmnd->request_bufflen,
 372                                         cmnd->resid, cmnd->underflow);
 373
 374                         host_status = DID_ERROR;
 375                 }
 376         } else if (resp_info & RESID_OVER) {
 377                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 378                                 "%d:0720 FCP command x%x residual "
 379                                 "overrun error. Data: x%x x%x \n",
 380                                 phba->brd_no, cmnd->cmnd[0],
 381                                 cmnd->request_bufflen, cmnd->resid);
 382                 host_status = DID_ERROR;
 383
 384         /*
 385          * Check SLI validation that all the transfer was actually done
 386          * (fcpi_parm should be zero). Apply check only to reads.
 387          */
 388         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 389                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 390                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 391                         "%d:0734 FCP Read Check Error Data: "
 392                         "x%x x%x x%x x%x\n", phba->brd_no,
 393                         be32_to_cpu(fcpcmd->fcpDl),
 394                         be32_to_cpu(fcprsp->rspResId),
 395                         fcpi_parm, cmnd->cmnd[0]);
 396                 host_status = DID_ERROR;
 397                 cmnd->resid = cmnd->request_bufflen;
 398         }
 399
 400  out:
 401         cmnd->result = ScsiResult(host_status, scsi_status);
 402 }
 403
 404 static void
 405 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 406                         struct lpfc_iocbq *pIocbOut)
 407 {
 408         struct lpfc_scsi_buf *lpfc_cmd =
 409                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 410         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 411         struct lpfc_nodelist *pnode = rdata->pnode;
 412         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 413         int result;
 414         struct scsi_device *sdev, *tmp_sdev;
 415         int depth = 0;
 416
 417         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 418         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 419
 420         if (lpfc_cmd->status) {
 421                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 422                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 423                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 424                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 425                         lpfc_cmd->status = IOSTAT_DEFAULT;
 426
 427                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 428                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 429                                 "x%x result: x%x Data: x%x x%x\n",
 430                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 431                                 cmd->device->lun, lpfc_cmd->status,
 432                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 433                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 434
 435                 switch (lpfc_cmd->status) {
 436                 case IOSTAT_FCP_RSP_ERROR:
 437                         /* Call FCP RSP handler to determine result */
 438                         lpfc_handle_fcp_err(lpfc_cmd);
 439                         break;
 440                 case IOSTAT_NPORT_BSY:
 441                 case IOSTAT_FABRIC_BSY:
 442                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 443                         break;
 444                 default:
 445                         cmd->result = ScsiResult(DID_ERROR, 0);
 446                         break;
 447                 }
 448
 449                 if ((pnode == NULL )
 450                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 451                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 452         } else {
 453                 cmd->result = ScsiResult(DID_OK, 0);
 454         }
 455
 456         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 457                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 458
 459                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 460                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 461                                 "SNS x%x x%x Data: x%x x%x\n",
 462                                 phba->brd_no, cmd->device->id,
 463                                 cmd->device->lun, cmd, cmd->result,
 464                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 465         }
 466
 467         result = cmd->result;
 468         sdev = cmd->device;
 469         cmd->scsi_done(cmd);
 470
 471         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 472                 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 473                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 474                 return;
 475         }
 476
 477         if (!result && pnode != NULL &&
 478            ((jiffies - pnode->last_ramp_up_time) >
 479                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 480            ((jiffies - pnode->last_q_full_time) >
 481                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 482            (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
 483                 shost_for_each_device(tmp_sdev, sdev->host) {
 484                         if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
 485                                 if (tmp_sdev->id != sdev->id)
 486                                         continue;
 487                                 if (tmp_sdev->ordered_tags)
 488                                         scsi_adjust_queue_depth(tmp_sdev,
 489                                                 MSG_ORDERED_TAG,
 490                                                 tmp_sdev->queue_depth+1);
 491                                 else
 492                                         scsi_adjust_queue_depth(tmp_sdev,
 493                                                 MSG_SIMPLE_TAG,
 494                                                 tmp_sdev->queue_depth+1);
 495
 496                                 pnode->last_ramp_up_time = jiffies;
 497                         }
 498                 }
 499         }
 500
 501         /*
 502          * Check for queue full.  If the lun is reporting queue full, then
 503          * back off the lun queue depth to prevent target overloads.
 504          */
 505         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
 506                 pnode->last_q_full_time = jiffies;
 507
 508                 shost_for_each_device(tmp_sdev, sdev->host) {
 509                         if (tmp_sdev->id != sdev->id)
 510                                 continue;
 511                         depth = scsi_track_queue_full(tmp_sdev,
 512                                         tmp_sdev->queue_depth - 1);
 513                 }
 514                 /*
 515                  * The queue depth cannot be lowered any more.
 516                  * Modify the returned error code to store
 517                  * the final depth value set by
 518                  * scsi_track_queue_full.
 519                  */
 520                 if (depth == -1)
 521                         depth = sdev->host->cmd_per_lun;
 522
 523                 if (depth) {
 524                         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 525                                 "%d:0711 detected queue full - lun queue depth "
 526                                 " adjusted to %d.\n", phba->brd_no, depth);
 527                 }
 528         }
 529
 530         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 531         lpfc_release_scsi_buf(phba, lpfc_cmd);
 532 }
 533
 534 static void
 535 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 536                         struct lpfc_nodelist *pnode)
 537 {
 538         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 539         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 540         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 541         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 542         int datadir = scsi_cmnd->sc_data_direction;
 543
 544         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 545         /* clear task management bits */
 546         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 547
 548         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 549                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 550
 551         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 552
 553         if (scsi_cmnd->device->tagged_supported) {
 554                 switch (scsi_cmnd->tag) {
 555                 case HEAD_OF_QUEUE_TAG:
 556                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 557                         break;
 558                 case ORDERED_QUEUE_TAG:
 559                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 560                         break;
 561                 default:
 562                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 563                         break;
 564                 }
 565         } else
 566                 fcp_cmnd->fcpCntl1 = 0;
 567
 568         /*
 569          * There are three possibilities here - use scatter-gather segment, use
 570          * the single mapping, or neither.  Start the lpfc command prep by
 571          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 572          * data bde entry.
 573          */
 574         if (scsi_cmnd->use_sg) {
 575                 if (datadir == DMA_TO_DEVICE) {
 576                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 577                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 578                         iocb_cmd->ulpPU = 0;
 579                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 580                         phba->fc4OutputRequests++;
 581                 } else {
 582                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 583                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 584                         iocb_cmd->un.fcpi.fcpi_parm =
 585                                 scsi_cmnd->request_bufflen;
 586                         fcp_cmnd->fcpCntl3 = READ_DATA;
 587                         phba->fc4InputRequests++;
 588                 }
 589         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 590                 if (datadir == DMA_TO_DEVICE) {
 591                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 592                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 593                         iocb_cmd->ulpPU = 0;
 594                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 595                         phba->fc4OutputRequests++;
 596                 } else {
 597                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 598                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 599                         iocb_cmd->un.fcpi.fcpi_parm =
 600                                 scsi_cmnd->request_bufflen;
 601                         fcp_cmnd->fcpCntl3 = READ_DATA;
 602                         phba->fc4InputRequests++;
 603                 }
 604         } else {
 605                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 606                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 607                 iocb_cmd->ulpPU = 0;
 608                 fcp_cmnd->fcpCntl3 = 0;
 609                 phba->fc4ControlRequests++;
 610         }
 611
 612         /*
 613          * Finish initializing those IOCB fields that are independent
 614          * of the scsi_cmnd request_buffer
 615          */
 616         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 617         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 618                 piocbq->iocb.ulpFCP2Rcvy = 1;
 619
 620         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 621         piocbq->context1  = lpfc_cmd;
 622         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 623         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 624 }
 625
 626 static int
 627 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 628                              struct lpfc_scsi_buf *lpfc_cmd,
 629                              unsigned int lun,
 630                              uint8_t task_mgmt_cmd)
 631 {
 632         struct lpfc_sli *psli;
 633         struct lpfc_iocbq *piocbq;
 634         IOCB_t *piocb;
 635         struct fcp_cmnd *fcp_cmnd;
 636         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 637         struct lpfc_nodelist *ndlp = rdata->pnode;
 638
 639         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 640                 return 0;
 641         }
 642
 643         psli = &phba->sli;
 644         piocbq = &(lpfc_cmd->cur_iocbq);
 645         piocb = &piocbq->iocb;
 646
 647         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 648         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 649         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 650
 651         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 652
 653         piocb->ulpContext = ndlp->nlp_rpi;
 654         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 655                 piocb->ulpFCP2Rcvy = 1;
 656         }
 657         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 658
 659         /* ulpTimeout is only one byte */
 660         if (lpfc_cmd->timeout > 0xff) {
 661                 /*
 662                  * Do not timeout the command at the firmware level.
 663                  * The driver will provide the timeout mechanism.
 664                  */
 665                 piocb->ulpTimeout = 0;
 666         } else {
 667                 piocb->ulpTimeout = lpfc_cmd->timeout;
 668         }
 669
 670         return (1);
 671 }
 672
 673 static int
 674 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
 675                     unsigned  tgt_id, unsigned int lun,
 676                     struct lpfc_rport_data *rdata)
 677 {
 678         struct lpfc_iocbq *iocbq;
 679         struct lpfc_iocbq *iocbqrsp;
 680         int ret;
 681
 682         if (!rdata->pnode)
 683                 return FAILED;
 684
 685         lpfc_cmd->rdata = rdata;
 686         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
 687                                            FCP_TARGET_RESET);
 688         if (!ret)
 689                 return FAILED;
 690
 691         lpfc_cmd->scsi_hba = phba;
 692         iocbq = &lpfc_cmd->cur_iocbq;
 693         iocbqrsp = lpfc_sli_get_iocbq(phba);
 694
 695         if (!iocbqrsp)
 696                 return FAILED;
 697
 698         /* Issue Target Reset to TGT <num> */
 699         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 700                         "%d:0702 Issue Target Reset to TGT %d "
 701                         "Data: x%x x%x\n",
 702                         phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
 703                         rdata->pnode->nlp_flag);
 704
 705         ret = lpfc_sli_issue_iocb_wait(phba,
 706                                        &phba->sli.ring[phba->sli.fcp_ring],
 707                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 708         if (ret != IOCB_SUCCESS) {
 709                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 710                 ret = FAILED;
 711         } else {
 712                 ret = SUCCESS;
 713                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 714                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 715                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 716                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 717                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 718         }
 719
 720         lpfc_sli_release_iocbq(phba, iocbqrsp);
 721         return ret;
 722 }
 723
 724 const char *
 725 lpfc_info(struct Scsi_Host *host)
 726 {
 727         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
 728         int len;
 729         static char  lpfcinfobuf[384];
 730
 731         memset(lpfcinfobuf,0,384);
 732         if (phba && phba->pcidev){
 733                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 734                 len = strlen(lpfcinfobuf);
 735                 snprintf(lpfcinfobuf + len,
 736                         384-len,
 737                         " on PCI bus %02x device %02x irq %d",
 738                         phba->pcidev->bus->number,
 739                         phba->pcidev->devfn,
 740                         phba->pcidev->irq);
 741                 len = strlen(lpfcinfobuf);
 742                 if (phba->Port[0]) {
 743                         snprintf(lpfcinfobuf + len,
 744                                  384-len,
 745                                  " port %s",
 746                                  phba->Port);
 747                 }
 748         }
 749         return lpfcinfobuf;
 750 }
 751
 752 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 753 {
 754         unsigned long  poll_tmo_expires =
 755                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 756
 757         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 758                 mod_timer(&phba->fcp_poll_timer,
 759                           poll_tmo_expires);
 760 }
 761
 762 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 763 {
 764         lpfc_poll_rearm_timer(phba);
 765 }
 766
 767 void lpfc_poll_timeout(unsigned long ptr)
 768 {
 769         struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
 770         unsigned long iflag;
 771
 772         spin_lock_irqsave(phba->host->host_lock, iflag);
 773
 774         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 775                 lpfc_sli_poll_fcp_ring (phba);
 776                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 777                         lpfc_poll_rearm_timer(phba);
 778         }
 779
 780         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 781 }
 782
 783 static int
 784 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 785 {
 786         struct lpfc_hba *phba =
 787                 (struct lpfc_hba *) cmnd->device->host->hostdata;
 788         struct lpfc_sli *psli = &phba->sli;
 789         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 790         struct lpfc_nodelist *ndlp = rdata->pnode;
 791         struct lpfc_scsi_buf *lpfc_cmd;
 792         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 793         int err;
 794
 795         err = fc_remote_port_chkready(rport);
 796         if (err) {
 797                 cmnd->result = err;
 798                 goto out_fail_command;
 799         }
 800
 801         /*
 802          * Catch race where our node has transitioned, but the
 803          * transport is still transitioning.
 804          */
 805         if (!ndlp) {
 806                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 807                 goto out_fail_command;
 808         }
 809         lpfc_cmd = lpfc_get_scsi_buf (phba);
 810         if (lpfc_cmd == NULL) {
 811                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 812                                 "%d:0707 driver's buffer pool is empty, "
 813                                 "IO busied\n", phba->brd_no);
 814                 goto out_host_busy;
 815         }
 816
 817         /*
 818          * Store the midlayer's command structure for the completion phase
 819          * and complete the command initialization.
 820          */
 821         lpfc_cmd->pCmd  = cmnd;
 822         lpfc_cmd->rdata = rdata;
 823         lpfc_cmd->timeout = 0;
 824         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 825         cmnd->scsi_done = done;
 826
 827         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 828         if (err)
 829                 goto out_host_busy_free_buf;
 830
 831         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 832
 833         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 834                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 835         if (err)
 836                 goto out_host_busy_free_buf;
 837
 838         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 839                 lpfc_sli_poll_fcp_ring(phba);
 840                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 841                         lpfc_poll_rearm_timer(phba);
 842         }
 843
 844         return 0;
 845
 846  out_host_busy_free_buf:
 847         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 848         lpfc_release_scsi_buf(phba, lpfc_cmd);
 849  out_host_busy:
 850         return SCSI_MLQUEUE_HOST_BUSY;
 851
 852  out_fail_command:
 853         done(cmnd);
 854         return 0;
 855 }
 856
 857 static void
 858 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
 859 {
 860         struct Scsi_Host *shost = cmnd->device->host;
 861         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 862
 863         spin_lock_irq(shost->host_lock);
 864         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
 865                 spin_unlock_irq(shost->host_lock);
 866                 msleep(1000);
 867                 spin_lock_irq(shost->host_lock);
 868         }
 869         spin_unlock_irq(shost->host_lock);
 870         return;
 871 }
 872
 873 static int
 874 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 875 {
 876         struct Scsi_Host *shost = cmnd->device->host;
 877         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
 878         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 879         struct lpfc_iocbq *iocb;
 880         struct lpfc_iocbq *abtsiocb;
 881         struct lpfc_scsi_buf *lpfc_cmd;
 882         IOCB_t *cmd, *icmd;
 883         unsigned int loop_count = 0;
 884         int ret = SUCCESS;
 885
 886         lpfc_block_error_handler(cmnd);
 887         spin_lock_irq(shost->host_lock);
 888
 889         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 890         BUG_ON(!lpfc_cmd);
 891
 892         /*
 893          * If pCmd field of the corresponding lpfc_scsi_buf structure
 894          * points to a different SCSI command, then the driver has
 895          * already completed this command, but the midlayer did not
 896          * see the completion before the eh fired.  Just return
 897          * SUCCESS.
 898          */
 899         iocb = &lpfc_cmd->cur_iocbq;
 900         if (lpfc_cmd->pCmd != cmnd)
 901                 goto out;
 902
 903         BUG_ON(iocb->context1 != lpfc_cmd);
 904
 905         abtsiocb = lpfc_sli_get_iocbq(phba);
 906         if (abtsiocb == NULL) {
 907                 ret = FAILED;
 908                 goto out;
 909         }
 910
 911         /*
 912          * The scsi command can not be in txq and it is in flight because the
 913          * pCmd is still pointig at the SCSI command we have to abort. There
 914          * is no need to search the txcmplq. Just send an abort to the FW.
 915          */
 916
 917         cmd = &iocb->iocb;
 918         icmd = &abtsiocb->iocb;
 919         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 920         icmd->un.acxri.abortContextTag = cmd->ulpContext;
 921         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 922
 923         icmd->ulpLe = 1;
 924         icmd->ulpClass = cmd->ulpClass;
 925         if (phba->hba_state >= LPFC_LINK_UP)
 926                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
 927         else
 928                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 929
 930         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 931         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
 932                 lpfc_sli_release_iocbq(phba, abtsiocb);
 933                 ret = FAILED;
 934                 goto out;
 935         }
 936
 937         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 938                 lpfc_sli_poll_fcp_ring (phba);
 939
 940         /* Wait for abort to complete */
 941         while (lpfc_cmd->pCmd == cmnd)
 942         {
 943                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 944                         lpfc_sli_poll_fcp_ring (phba);
 945
 946                 spin_unlock_irq(phba->host->host_lock);
 947                         schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
 948                 spin_lock_irq(phba->host->host_lock);
 949                 if (++loop_count
 950                     > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
 951                         break;
 952         }
 953
 954         if (lpfc_cmd->pCmd == cmnd) {
 955                 ret = FAILED;
 956                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 957                                 "%d:0748 abort handler timed out waiting for "
 958                                 "abort to complete: ret %#x, ID %d, LUN %d, "
 959                                 "snum %#lx\n",
 960                                 phba->brd_no,  ret, cmnd->device->id,
 961                                 cmnd->device->lun, cmnd->serial_number);
 962         }
 963
 964  out:
 965         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 966                         "%d:0749 SCSI Layer I/O Abort Request "
 967                         "Status x%x ID %d LUN %d snum %#lx\n",
 968                         phba->brd_no, ret, cmnd->device->id,
 969                         cmnd->device->lun, cmnd->serial_number);
 970
 971         spin_unlock_irq(shost->host_lock);
 972
 973         return ret;
 974 }
 975
 976 static int
 977 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 978 {
 979         struct Scsi_Host *shost = cmnd->device->host;
 980         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
 981         struct lpfc_scsi_buf *lpfc_cmd;
 982         struct lpfc_iocbq *iocbq, *iocbqrsp;
 983         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 984         struct lpfc_nodelist *pnode = rdata->pnode;
 985         uint32_t cmd_result = 0, cmd_status = 0;
 986         int ret = FAILED;
 987         int cnt, loopcnt;
 988
 989         lpfc_block_error_handler(cmnd);
 990         spin_lock_irq(shost->host_lock);
 991         loopcnt = 0;
 992         /*
 993          * If target is not in a MAPPED state, delay the reset until
 994          * target is rediscovered or devloss timeout expires.
 995          */
 996         while ( 1 ) {
 997                 if (!pnode)
 998                         return FAILED;
 999
1000                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1001                         spin_unlock_irq(phba->host->host_lock);
1002                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1003                         spin_lock_irq(phba->host->host_lock);
1004                         loopcnt++;
1005                         rdata = cmnd->device->hostdata;
1006                         if (!rdata ||
1007                                 (loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
1008                                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1009                                         "%d:0721 LUN Reset rport failure:"
1010                                         " cnt x%x rdata x%p\n",
1011                                         phba->brd_no, loopcnt, rdata);
1012                                 goto out;
1013                         }
1014                         pnode = rdata->pnode;
1015                         if (!pnode)
1016                                 return FAILED;
1017                 }
1018                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1019                         break;
1020         }
1021
1022         lpfc_cmd = lpfc_get_scsi_buf (phba);
1023         if (lpfc_cmd == NULL)
1024                 goto out;
1025
1026         lpfc_cmd->timeout = 60;
1027         lpfc_cmd->scsi_hba = phba;
1028         lpfc_cmd->rdata = rdata;
1029
1030         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
1031                                            FCP_LUN_RESET);
1032         if (!ret)
1033                 goto out_free_scsi_buf;
1034
1035         iocbq = &lpfc_cmd->cur_iocbq;
1036
1037         /* get a buffer for this IOCB command response */
1038         iocbqrsp = lpfc_sli_get_iocbq(phba);
1039         if (iocbqrsp == NULL)
1040                 goto out_free_scsi_buf;
1041
1042         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1043                         "%d:0703 Issue LUN Reset to TGT %d LUN %d "
1044                         "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
1045                         cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1046
1047         ret = lpfc_sli_issue_iocb_wait(phba,
1048                                        &phba->sli.ring[phba->sli.fcp_ring],
1049                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1050         if (ret == IOCB_SUCCESS)
1051                 ret = SUCCESS;
1052
1053
1054         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1055         cmd_status = iocbqrsp->iocb.ulpStatus;
1056
1057         lpfc_sli_release_iocbq(phba, iocbqrsp);
1058
1059         /*
1060          * All outstanding txcmplq I/Os should have been aborted by the device.
1061          * Unfortunately, some targets do not abide by this forcing the driver
1062          * to double check.
1063          */
1064         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1065                                 cmnd->device->id, cmnd->device->lun,
1066                                 LPFC_CTX_LUN);
1067         if (cnt)
1068                 lpfc_sli_abort_iocb(phba,
1069                                     &phba->sli.ring[phba->sli.fcp_ring],
1070                                     cmnd->device->id, cmnd->device->lun,
1071                                     0, LPFC_CTX_LUN);
1072         loopcnt = 0;
1073         while(cnt) {
1074                 spin_unlock_irq(phba->host->host_lock);
1075                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1076                 spin_lock_irq(phba->host->host_lock);
1077
1078                 if (++loopcnt
1079                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1080                         break;
1081
1082                 cnt = lpfc_sli_sum_iocb(phba,
1083                                         &phba->sli.ring[phba->sli.fcp_ring],
1084                                         cmnd->device->id, cmnd->device->lun,
1085                                         LPFC_CTX_LUN);
1086         }
1087
1088         if (cnt) {
1089                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1090                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1091                         phba->brd_no, cnt);
1092                 ret = FAILED;
1093         }
1094
1095 out_free_scsi_buf:
1096         lpfc_release_scsi_buf(phba, lpfc_cmd);
1097
1098         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1099                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1100                         "Data: x%x x%x x%x\n",
1101                         phba->brd_no, cmnd->device->id,cmnd->device->lun,
1102                         ret, cmd_status, cmd_result);
1103
1104 out:
1105         spin_unlock_irq(shost->host_lock);
1106         return ret;
1107 }
1108
1109 static int
1110 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1111 {
1112         struct Scsi_Host *shost = cmnd->device->host;
1113         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
1114         struct lpfc_nodelist *ndlp = NULL;
1115         int match;
1116         int ret = FAILED, i, err_count = 0;
1117         int cnt, loopcnt;
1118         struct lpfc_scsi_buf * lpfc_cmd;
1119
1120         lpfc_block_error_handler(cmnd);
1121         spin_lock_irq(shost->host_lock);
1122
1123         lpfc_cmd = lpfc_get_scsi_buf(phba);
1124         if (lpfc_cmd == NULL)
1125                 goto out;
1126
1127         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1128         lpfc_cmd->timeout = 60;
1129         lpfc_cmd->scsi_hba = phba;
1130
1131         /*
1132          * Since the driver manages a single bus device, reset all
1133          * targets known to the driver.  Should any target reset
1134          * fail, this routine returns failure to the midlayer.
1135          */
1136         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1137                 /* Search the mapped list for this target ID */
1138                 match = 0;
1139                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1140                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1141                                 match = 1;
1142                                 break;
1143                         }
1144                 }
1145                 if (!match)
1146                         continue;
1147
1148                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
1149                                           ndlp->rport->dd_data);
1150                 if (ret != SUCCESS) {
1151                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1152                                 "%d:0700 Bus Reset on target %d failed\n",
1153                                 phba->brd_no, i);
1154                         err_count++;
1155                 }
1156         }
1157
1158         if (err_count == 0)
1159                 ret = SUCCESS;
1160
1161         lpfc_release_scsi_buf(phba, lpfc_cmd);
1162
1163         /*
1164          * All outstanding txcmplq I/Os should have been aborted by
1165          * the targets.  Unfortunately, some targets do not abide by
1166          * this forcing the driver to double check.
1167          */
1168         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1169                                 0, 0, LPFC_CTX_HOST);
1170         if (cnt)
1171                 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1172                                     0, 0, 0, LPFC_CTX_HOST);
1173         loopcnt = 0;
1174         while(cnt) {
1175                 spin_unlock_irq(phba->host->host_lock);
1176                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1177                 spin_lock_irq(phba->host->host_lock);
1178
1179                 if (++loopcnt
1180                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1181                         break;
1182
1183                 cnt = lpfc_sli_sum_iocb(phba,
1184                                         &phba->sli.ring[phba->sli.fcp_ring],
1185                                         0, 0, LPFC_CTX_HOST);
1186         }
1187
1188         if (cnt) {
1189                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1190                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1191                    phba->brd_no, cnt, i);
1192                 ret = FAILED;
1193         }
1194
1195         lpfc_printf_log(phba,
1196                         KERN_ERR,
1197                         LOG_FCP,
1198                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1199                         phba->brd_no, ret);
1200 out:
1201         spin_unlock_irq(shost->host_lock);
1202         return ret;
1203 }
1204
1205 static int
1206 lpfc_slave_alloc(struct scsi_device *sdev)
1207 {
1208         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
1209         struct lpfc_scsi_buf *scsi_buf = NULL;
1210         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1211         uint32_t total = 0, i;
1212         uint32_t num_to_alloc = 0;
1213         unsigned long flags;
1214
1215         if (!rport || fc_remote_port_chkready(rport))
1216                 return -ENXIO;
1217
1218         sdev->hostdata = rport->dd_data;
1219
1220         /*
1221          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1222          * available list of scsi buffers.  Don't allocate more than the
1223          * HBA limit conveyed to the midlayer via the host structure.  The
1224          * formula accounts for the lun_queue_depth + error handlers + 1
1225          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1226          */
1227         total = phba->total_scsi_bufs;
1228         num_to_alloc = phba->cfg_lun_queue_depth + 2;
1229         if (total >= phba->cfg_hba_queue_depth) {
1230                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1231                                 "%d:0704 At limitation of %d preallocated "
1232                                 "command buffers\n", phba->brd_no, total);
1233                 return 0;
1234         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1235                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1236                                 "%d:0705 Allocation request of %d command "
1237                                 "buffers will exceed max of %d.  Reducing "
1238                                 "allocation request to %d.\n", phba->brd_no,
1239                                 num_to_alloc, phba->cfg_hba_queue_depth,
1240                                 (phba->cfg_hba_queue_depth - total));
1241                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1242         }
1243
1244         for (i = 0; i < num_to_alloc; i++) {
1245                 scsi_buf = lpfc_new_scsi_buf(phba);
1246                 if (!scsi_buf) {
1247                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1248                                         "%d:0706 Failed to allocate command "
1249                                         "buffer\n", phba->brd_no);
1250                         break;
1251                 }
1252
1253                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1254                 phba->total_scsi_bufs++;
1255                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1256                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1257         }
1258         return 0;
1259 }
1260
1261 static int
1262 lpfc_slave_configure(struct scsi_device *sdev)
1263 {
1264         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
1265         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1266
1267         if (sdev->tagged_supported)
1268                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1269         else
1270                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1271
1272         /*
1273          * Initialize the fc transport attributes for the target
1274          * containing this scsi device.  Also note that the driver's
1275          * target pointer is stored in the starget_data for the
1276          * driver's sysfs entry point functions.
1277          */
1278         rport->dev_loss_tmo = phba->cfg_devloss_tmo;
1279
1280         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1281                 lpfc_sli_poll_fcp_ring(phba);
1282                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1283                         lpfc_poll_rearm_timer(phba);
1284         }
1285
1286         return 0;
1287 }
1288
1289 static void
1290 lpfc_slave_destroy(struct scsi_device *sdev)
1291 {
1292         sdev->hostdata = NULL;
1293         return;
1294 }
1295
1296 struct scsi_host_template lpfc_template = {
1297         .module                 = THIS_MODULE,
1298         .name                   = LPFC_DRIVER_NAME,
1299         .info                   = lpfc_info,
1300         .queuecommand           = lpfc_queuecommand,
1301         .eh_abort_handler       = lpfc_abort_handler,
1302         .eh_device_reset_handler= lpfc_reset_lun_handler,
1303         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1304         .slave_alloc            = lpfc_slave_alloc,
1305         .slave_configure        = lpfc_slave_configure,
1306         .slave_destroy          = lpfc_slave_destroy,
1307         .this_id                = -1,
1308         .sg_tablesize           = LPFC_SG_SEG_CNT,
1309         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1310         .use_clustering         = ENABLE_CLUSTERING,
1311         .shost_attrs            = lpfc_host_attrs,
1312         .max_sectors            = 0xFFFF,
1313 };