git.oblomov.eu Git - linux-2.6/blob - 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         if (lpfc_cmd) {
 150                 lpfc_cmd->seg_cnt = 0;
 151                 lpfc_cmd->nonsg_phys = 0;
 152         }
 153         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 154         return  lpfc_cmd;
 155 }
 156
 157 static void
 158 lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 159 {
 160         unsigned long iflag = 0;
 161
 162         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 163         psb->pCmd = NULL;
 164         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 165         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 166 }
 167
 168 static int
 169 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
 170 {
 171         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 172         struct scatterlist *sgel = NULL;
 173         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 174         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 175         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 176         dma_addr_t physaddr;
 177         uint32_t i, num_bde = 0;
 178         int datadir = scsi_cmnd->sc_data_direction;
 179         int dma_error;
 180
 181         /*
 182          * There are three possibilities here - use scatter-gather segment, use
 183          * the single mapping, or neither.  Start the lpfc command prep by
 184          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 185          * data bde entry.
 186          */
 187         bpl += 2;
 188         if (scsi_cmnd->use_sg) {
 189                 /*
 190                  * The driver stores the segment count returned from pci_map_sg
 191                  * because this a count of dma-mappings used to map the use_sg
 192                  * pages.  They are not guaranteed to be the same for those
 193                  * architectures that implement an IOMMU.
 194                  */
 195                 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
 196                 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
 197                                                 scsi_cmnd->use_sg, datadir);
 198                 if (lpfc_cmd->seg_cnt == 0)
 199                         return 1;
 200
 201                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 202                         printk(KERN_ERR "%s: Too many sg segments from "
 203                                "dma_map_sg.  Config %d, seg_cnt %d",
 204                                __FUNCTION__, phba->cfg_sg_seg_cnt,
 205                                lpfc_cmd->seg_cnt);
 206                         dma_unmap_sg(&phba->pcidev->dev, sgel,
 207                                      lpfc_cmd->seg_cnt, datadir);
 208                         return 1;
 209                 }
 210
 211                 /*
 212                  * The driver established a maximum scatter-gather segment count
 213                  * during probe that limits the number of sg elements in any
 214                  * single scsi command.  Just run through the seg_cnt and format
 215                  * the bde's.
 216                  */
 217                 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
 218                         physaddr = sg_dma_address(sgel);
 219                         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 220                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 221                         bpl->tus.f.bdeSize = sg_dma_len(sgel);
 222                         if (datadir == DMA_TO_DEVICE)
 223                                 bpl->tus.f.bdeFlags = 0;
 224                         else
 225                                 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 226                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 227                         bpl++;
 228                         sgel++;
 229                         num_bde++;
 230                 }
 231         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 232                 physaddr = dma_map_single(&phba->pcidev->dev,
 233                                           scsi_cmnd->request_buffer,
 234                                           scsi_cmnd->request_bufflen,
 235                                           datadir);
 236                 dma_error = dma_mapping_error(physaddr);
 237                 if (dma_error) {
 238                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 239                                 "%d:0718 Unable to dma_map_single "
 240                                 "request_buffer: x%x\n",
 241                                 phba->brd_no, dma_error);
 242                         return 1;
 243                 }
 244
 245                 lpfc_cmd->nonsg_phys = physaddr;
 246                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
 247                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
 248                 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
 249                 if (datadir == DMA_TO_DEVICE)
 250                         bpl->tus.f.bdeFlags = 0;
 251                 else
 252                         bpl->tus.f.bdeFlags = BUFF_USE_RCV;
 253                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 254                 num_bde = 1;
 255                 bpl++;
 256         }
 257
 258         /*
 259          * Finish initializing those IOCB fields that are dependent on the
 260          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
 261          * reinitialized since all iocb memory resources are used many times
 262          * for transmit, receive, and continuation bpl's.
 263          */
 264         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
 265         iocb_cmd->un.fcpi64.bdl.bdeSize +=
 266                 (num_bde * sizeof (struct ulp_bde64));
 267         iocb_cmd->ulpBdeCount = 1;
 268         iocb_cmd->ulpLe = 1;
 269         fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
 270         return 0;
 271 }
 272
 273 static void
 274 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 275 {
 276         /*
 277          * There are only two special cases to consider.  (1) the scsi command
 278          * requested scatter-gather usage or (2) the scsi command allocated
 279          * a request buffer, but did not request use_sg.  There is a third
 280          * case, but it does not require resource deallocation.
 281          */
 282         if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
 283                 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
 284                                 psb->seg_cnt, psb->pCmd->sc_data_direction);
 285         } else {
 286                  if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
 287                         dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
 288                                                 psb->pCmd->request_bufflen,
 289                                                 psb->pCmd->sc_data_direction);
 290                  }
 291         }
 292 }
 293
 294 static void
 295 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
 296 {
 297         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 298         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 299         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 300         struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
 301         uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
 302         uint32_t resp_info = fcprsp->rspStatus2;
 303         uint32_t scsi_status = fcprsp->rspStatus3;
 304         uint32_t *lp;
 305         uint32_t host_status = DID_OK;
 306         uint32_t rsplen = 0;
 307         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 308
 309         /*
 310          *  If this is a task management command, there is no
 311          *  scsi packet associated with this lpfc_cmd.  The driver
 312          *  consumes it.
 313          */
 314         if (fcpcmd->fcpCntl2) {
 315                 scsi_status = 0;
 316                 goto out;
 317         }
 318
 319         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 320                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 321                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 322                         snslen = SCSI_SENSE_BUFFERSIZE;
 323
 324                 if (resp_info & RSP_LEN_VALID)
 325                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 326                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 327         }
 328         lp = (uint32_t *)cmnd->sense_buffer;
 329
 330         if (!scsi_status && (resp_info & RESID_UNDER))
 331                 logit = LOG_FCP;
 332
 333         lpfc_printf_log(phba, KERN_WARNING, logit,
 334                         "%d:0730 FCP command x%x failed: x%x SNS x%x x%x "
 335                         "Data: x%x x%x x%x x%x x%x\n",
 336                         phba->brd_no, cmnd->cmnd[0], scsi_status,
 337                         be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 338                         be32_to_cpu(fcprsp->rspResId),
 339                         be32_to_cpu(fcprsp->rspSnsLen),
 340                         be32_to_cpu(fcprsp->rspRspLen),
 341                         fcprsp->rspInfo3);
 342
 343         if (resp_info & RSP_LEN_VALID) {
 344                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 345                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 346                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 347                         host_status = DID_ERROR;
 348                         goto out;
 349                 }
 350         }
 351
 352         cmnd->resid = 0;
 353         if (resp_info & RESID_UNDER) {
 354                 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 355
 356                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 357                                 "%d:0716 FCP Read Underrun, expected %d, "
 358                                 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
 359                                 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
 360                                 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
 361
 362                 /*
 363                  * The cmnd->underflow is the minimum number of bytes that must
 364                  * be transfered for this command.  Provided a sense condition
 365                  * is not present, make sure the actual amount transferred is at
 366                  * least the underflow value or fail.
 367                  */
 368                 if (!(resp_info & SNS_LEN_VALID) &&
 369                     (scsi_status == SAM_STAT_GOOD) &&
 370                     (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
 371                         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 372                                         "%d:0717 FCP command x%x residual "
 373                                         "underrun converted to error "
 374                                         "Data: x%x x%x x%x\n", phba->brd_no,
 375                                         cmnd->cmnd[0], cmnd->request_bufflen,
 376                                         cmnd->resid, cmnd->underflow);
 377
 378                         host_status = DID_ERROR;
 379                 }
 380         } else if (resp_info & RESID_OVER) {
 381                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 382                                 "%d:0720 FCP command x%x residual "
 383                                 "overrun error. Data: x%x x%x \n",
 384                                 phba->brd_no, cmnd->cmnd[0],
 385                                 cmnd->request_bufflen, cmnd->resid);
 386                 host_status = DID_ERROR;
 387
 388         /*
 389          * Check SLI validation that all the transfer was actually done
 390          * (fcpi_parm should be zero). Apply check only to reads.
 391          */
 392         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 393                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 394                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 395                         "%d:0734 FCP Read Check Error Data: "
 396                         "x%x x%x x%x x%x\n", phba->brd_no,
 397                         be32_to_cpu(fcpcmd->fcpDl),
 398                         be32_to_cpu(fcprsp->rspResId),
 399                         fcpi_parm, cmnd->cmnd[0]);
 400                 host_status = DID_ERROR;
 401                 cmnd->resid = cmnd->request_bufflen;
 402         }
 403
 404  out:
 405         cmnd->result = ScsiResult(host_status, scsi_status);
 406 }
 407
 408 static void
 409 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 410                         struct lpfc_iocbq *pIocbOut)
 411 {
 412         struct lpfc_scsi_buf *lpfc_cmd =
 413                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 414         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 415         struct lpfc_nodelist *pnode = rdata->pnode;
 416         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 417         int result;
 418         struct scsi_device *sdev, *tmp_sdev;
 419         int depth = 0;
 420
 421         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 422         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 423
 424         if (lpfc_cmd->status) {
 425                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 426                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 427                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 428                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 429                         lpfc_cmd->status = IOSTAT_DEFAULT;
 430
 431                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 432                                 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
 433                                 "x%x result: x%x Data: x%x x%x\n",
 434                                 phba->brd_no, cmd->cmnd[0], cmd->device->id,
 435                                 cmd->device->lun, lpfc_cmd->status,
 436                                 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
 437                                 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 438
 439                 switch (lpfc_cmd->status) {
 440                 case IOSTAT_FCP_RSP_ERROR:
 441                         /* Call FCP RSP handler to determine result */
 442                         lpfc_handle_fcp_err(lpfc_cmd);
 443                         break;
 444                 case IOSTAT_NPORT_BSY:
 445                 case IOSTAT_FABRIC_BSY:
 446                         cmd->result = ScsiResult(DID_BUS_BUSY, 0);
 447                         break;
 448                 default:
 449                         cmd->result = ScsiResult(DID_ERROR, 0);
 450                         break;
 451                 }
 452
 453                 if ((pnode == NULL )
 454                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 455                         cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
 456         } else {
 457                 cmd->result = ScsiResult(DID_OK, 0);
 458         }
 459
 460         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 461                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 462
 463                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 464                                 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
 465                                 "SNS x%x x%x Data: x%x x%x\n",
 466                                 phba->brd_no, cmd->device->id,
 467                                 cmd->device->lun, cmd, cmd->result,
 468                                 *lp, *(lp + 3), cmd->retries, cmd->resid);
 469         }
 470
 471         result = cmd->result;
 472         sdev = cmd->device;
 473         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 474         cmd->scsi_done(cmd);
 475
 476         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 477                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 478                 return;
 479         }
 480
 481         if (!result && pnode != NULL &&
 482            ((jiffies - pnode->last_ramp_up_time) >
 483                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 484            ((jiffies - pnode->last_q_full_time) >
 485                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 486            (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
 487                 shost_for_each_device(tmp_sdev, sdev->host) {
 488                         if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
 489                                 if (tmp_sdev->id != sdev->id)
 490                                         continue;
 491                                 if (tmp_sdev->ordered_tags)
 492                                         scsi_adjust_queue_depth(tmp_sdev,
 493                                                 MSG_ORDERED_TAG,
 494                                                 tmp_sdev->queue_depth+1);
 495                                 else
 496                                         scsi_adjust_queue_depth(tmp_sdev,
 497                                                 MSG_SIMPLE_TAG,
 498                                                 tmp_sdev->queue_depth+1);
 499
 500                                 pnode->last_ramp_up_time = jiffies;
 501                         }
 502                 }
 503         }
 504
 505         /*
 506          * Check for queue full.  If the lun is reporting queue full, then
 507          * back off the lun queue depth to prevent target overloads.
 508          */
 509         if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
 510                 pnode->last_q_full_time = jiffies;
 511
 512                 shost_for_each_device(tmp_sdev, sdev->host) {
 513                         if (tmp_sdev->id != sdev->id)
 514                                 continue;
 515                         depth = scsi_track_queue_full(tmp_sdev,
 516                                         tmp_sdev->queue_depth - 1);
 517                 }
 518                 /*
 519                  * The queue depth cannot be lowered any more.
 520                  * Modify the returned error code to store
 521                  * the final depth value set by
 522                  * scsi_track_queue_full.
 523                  */
 524                 if (depth == -1)
 525                         depth = sdev->host->cmd_per_lun;
 526
 527                 if (depth) {
 528                         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 529                                 "%d:0711 detected queue full - lun queue depth "
 530                                 " adjusted to %d.\n", phba->brd_no, depth);
 531                 }
 532         }
 533
 534         lpfc_release_scsi_buf(phba, lpfc_cmd);
 535 }
 536
 537 static void
 538 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
 539                         struct lpfc_nodelist *pnode)
 540 {
 541         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 542         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 543         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 544         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 545         int datadir = scsi_cmnd->sc_data_direction;
 546
 547         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 548         /* clear task management bits */
 549         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 550
 551         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 552                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 553
 554         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 555
 556         if (scsi_cmnd->device->tagged_supported) {
 557                 switch (scsi_cmnd->tag) {
 558                 case HEAD_OF_QUEUE_TAG:
 559                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 560                         break;
 561                 case ORDERED_QUEUE_TAG:
 562                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 563                         break;
 564                 default:
 565                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 566                         break;
 567                 }
 568         } else
 569                 fcp_cmnd->fcpCntl1 = 0;
 570
 571         /*
 572          * There are three possibilities here - use scatter-gather segment, use
 573          * the single mapping, or neither.  Start the lpfc command prep by
 574          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 575          * data bde entry.
 576          */
 577         if (scsi_cmnd->use_sg) {
 578                 if (datadir == DMA_TO_DEVICE) {
 579                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 580                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 581                         iocb_cmd->ulpPU = 0;
 582                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 583                         phba->fc4OutputRequests++;
 584                 } else {
 585                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 586                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 587                         iocb_cmd->un.fcpi.fcpi_parm =
 588                                 scsi_cmnd->request_bufflen;
 589                         fcp_cmnd->fcpCntl3 = READ_DATA;
 590                         phba->fc4InputRequests++;
 591                 }
 592         } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
 593                 if (datadir == DMA_TO_DEVICE) {
 594                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 595                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 596                         iocb_cmd->ulpPU = 0;
 597                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 598                         phba->fc4OutputRequests++;
 599                 } else {
 600                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 601                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 602                         iocb_cmd->un.fcpi.fcpi_parm =
 603                                 scsi_cmnd->request_bufflen;
 604                         fcp_cmnd->fcpCntl3 = READ_DATA;
 605                         phba->fc4InputRequests++;
 606                 }
 607         } else {
 608                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 609                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 610                 iocb_cmd->ulpPU = 0;
 611                 fcp_cmnd->fcpCntl3 = 0;
 612                 phba->fc4ControlRequests++;
 613         }
 614
 615         /*
 616          * Finish initializing those IOCB fields that are independent
 617          * of the scsi_cmnd request_buffer
 618          */
 619         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 620         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 621                 piocbq->iocb.ulpFCP2Rcvy = 1;
 622
 623         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 624         piocbq->context1  = lpfc_cmd;
 625         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 626         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 627 }
 628
 629 static int
 630 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
 631                              struct lpfc_scsi_buf *lpfc_cmd,
 632                              unsigned int lun,
 633                              uint8_t task_mgmt_cmd)
 634 {
 635         struct lpfc_sli *psli;
 636         struct lpfc_iocbq *piocbq;
 637         IOCB_t *piocb;
 638         struct fcp_cmnd *fcp_cmnd;
 639         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 640         struct lpfc_nodelist *ndlp = rdata->pnode;
 641
 642         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
 643                 return 0;
 644         }
 645
 646         psli = &phba->sli;
 647         piocbq = &(lpfc_cmd->cur_iocbq);
 648         piocb = &piocbq->iocb;
 649
 650         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 651         int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
 652         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 653
 654         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 655
 656         piocb->ulpContext = ndlp->nlp_rpi;
 657         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 658                 piocb->ulpFCP2Rcvy = 1;
 659         }
 660         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 661
 662         /* ulpTimeout is only one byte */
 663         if (lpfc_cmd->timeout > 0xff) {
 664                 /*
 665                  * Do not timeout the command at the firmware level.
 666                  * The driver will provide the timeout mechanism.
 667                  */
 668                 piocb->ulpTimeout = 0;
 669         } else {
 670                 piocb->ulpTimeout = lpfc_cmd->timeout;
 671         }
 672
 673         return (1);
 674 }
 675
 676 static int
 677 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
 678                     unsigned  tgt_id, unsigned int lun,
 679                     struct lpfc_rport_data *rdata)
 680 {
 681         struct lpfc_iocbq *iocbq;
 682         struct lpfc_iocbq *iocbqrsp;
 683         int ret;
 684
 685         if (!rdata->pnode)
 686                 return FAILED;
 687
 688         lpfc_cmd->rdata = rdata;
 689         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
 690                                            FCP_TARGET_RESET);
 691         if (!ret)
 692                 return FAILED;
 693
 694         lpfc_cmd->scsi_hba = phba;
 695         iocbq = &lpfc_cmd->cur_iocbq;
 696         iocbqrsp = lpfc_sli_get_iocbq(phba);
 697
 698         if (!iocbqrsp)
 699                 return FAILED;
 700
 701         /* Issue Target Reset to TGT <num> */
 702         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 703                         "%d:0702 Issue Target Reset to TGT %d "
 704                         "Data: x%x x%x\n",
 705                         phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
 706                         rdata->pnode->nlp_flag);
 707
 708         ret = lpfc_sli_issue_iocb_wait(phba,
 709                                        &phba->sli.ring[phba->sli.fcp_ring],
 710                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
 711         if (ret != IOCB_SUCCESS) {
 712                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 713                 ret = FAILED;
 714         } else {
 715                 ret = SUCCESS;
 716                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
 717                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
 718                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 719                         (lpfc_cmd->result & IOERR_DRVR_MASK))
 720                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 721         }
 722
 723         lpfc_sli_release_iocbq(phba, iocbqrsp);
 724         return ret;
 725 }
 726
 727 const char *
 728 lpfc_info(struct Scsi_Host *host)
 729 {
 730         struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
 731         int len;
 732         static char  lpfcinfobuf[384];
 733
 734         memset(lpfcinfobuf,0,384);
 735         if (phba && phba->pcidev){
 736                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
 737                 len = strlen(lpfcinfobuf);
 738                 snprintf(lpfcinfobuf + len,
 739                         384-len,
 740                         " on PCI bus %02x device %02x irq %d",
 741                         phba->pcidev->bus->number,
 742                         phba->pcidev->devfn,
 743                         phba->pcidev->irq);
 744                 len = strlen(lpfcinfobuf);
 745                 if (phba->Port[0]) {
 746                         snprintf(lpfcinfobuf + len,
 747                                  384-len,
 748                                  " port %s",
 749                                  phba->Port);
 750                 }
 751         }
 752         return lpfcinfobuf;
 753 }
 754
 755 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 756 {
 757         unsigned long  poll_tmo_expires =
 758                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 759
 760         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
 761                 mod_timer(&phba->fcp_poll_timer,
 762                           poll_tmo_expires);
 763 }
 764
 765 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 766 {
 767         lpfc_poll_rearm_timer(phba);
 768 }
 769
 770 void lpfc_poll_timeout(unsigned long ptr)
 771 {
 772         struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
 773         unsigned long iflag;
 774
 775         spin_lock_irqsave(phba->host->host_lock, iflag);
 776
 777         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 778                 lpfc_sli_poll_fcp_ring (phba);
 779                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 780                         lpfc_poll_rearm_timer(phba);
 781         }
 782
 783         spin_unlock_irqrestore(phba->host->host_lock, iflag);
 784 }
 785
 786 static int
 787 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 788 {
 789         struct lpfc_hba *phba =
 790                 (struct lpfc_hba *) cmnd->device->host->hostdata;
 791         struct lpfc_sli *psli = &phba->sli;
 792         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 793         struct lpfc_nodelist *ndlp = rdata->pnode;
 794         struct lpfc_scsi_buf *lpfc_cmd;
 795         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 796         int err;
 797
 798         err = fc_remote_port_chkready(rport);
 799         if (err) {
 800                 cmnd->result = err;
 801                 goto out_fail_command;
 802         }
 803
 804         /*
 805          * Catch race where our node has transitioned, but the
 806          * transport is still transitioning.
 807          */
 808         if (!ndlp) {
 809                 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
 810                 goto out_fail_command;
 811         }
 812         lpfc_cmd = lpfc_get_scsi_buf (phba);
 813         if (lpfc_cmd == NULL) {
 814                 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
 815                                 "%d:0707 driver's buffer pool is empty, "
 816                                 "IO busied\n", phba->brd_no);
 817                 goto out_host_busy;
 818         }
 819
 820         /*
 821          * Store the midlayer's command structure for the completion phase
 822          * and complete the command initialization.
 823          */
 824         lpfc_cmd->pCmd  = cmnd;
 825         lpfc_cmd->rdata = rdata;
 826         lpfc_cmd->timeout = 0;
 827         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 828         cmnd->scsi_done = done;
 829
 830         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 831         if (err)
 832                 goto out_host_busy_free_buf;
 833
 834         lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
 835
 836         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
 837                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
 838         if (err)
 839                 goto out_host_busy_free_buf;
 840
 841         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 842                 lpfc_sli_poll_fcp_ring(phba);
 843                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 844                         lpfc_poll_rearm_timer(phba);
 845         }
 846
 847         return 0;
 848
 849  out_host_busy_free_buf:
 850         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 851         lpfc_release_scsi_buf(phba, lpfc_cmd);
 852  out_host_busy:
 853         return SCSI_MLQUEUE_HOST_BUSY;
 854
 855  out_fail_command:
 856         done(cmnd);
 857         return 0;
 858 }
 859
 860 static void
 861 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
 862 {
 863         struct Scsi_Host *shost = cmnd->device->host;
 864         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
 865
 866         spin_lock_irq(shost->host_lock);
 867         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
 868                 spin_unlock_irq(shost->host_lock);
 869                 msleep(1000);
 870                 spin_lock_irq(shost->host_lock);
 871         }
 872         spin_unlock_irq(shost->host_lock);
 873         return;
 874 }
 875
 876 static int
 877 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 878 {
 879         struct Scsi_Host *shost = cmnd->device->host;
 880         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
 881         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
 882         struct lpfc_iocbq *iocb;
 883         struct lpfc_iocbq *abtsiocb;
 884         struct lpfc_scsi_buf *lpfc_cmd;
 885         IOCB_t *cmd, *icmd;
 886         unsigned int loop_count = 0;
 887         int ret = SUCCESS;
 888
 889         lpfc_block_error_handler(cmnd);
 890         spin_lock_irq(shost->host_lock);
 891
 892         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
 893         BUG_ON(!lpfc_cmd);
 894
 895         /*
 896          * If pCmd field of the corresponding lpfc_scsi_buf structure
 897          * points to a different SCSI command, then the driver has
 898          * already completed this command, but the midlayer did not
 899          * see the completion before the eh fired.  Just return
 900          * SUCCESS.
 901          */
 902         iocb = &lpfc_cmd->cur_iocbq;
 903         if (lpfc_cmd->pCmd != cmnd)
 904                 goto out;
 905
 906         BUG_ON(iocb->context1 != lpfc_cmd);
 907
 908         abtsiocb = lpfc_sli_get_iocbq(phba);
 909         if (abtsiocb == NULL) {
 910                 ret = FAILED;
 911                 goto out;
 912         }
 913
 914         /*
 915          * The scsi command can not be in txq and it is in flight because the
 916          * pCmd is still pointig at the SCSI command we have to abort. There
 917          * is no need to search the txcmplq. Just send an abort to the FW.
 918          */
 919
 920         cmd = &iocb->iocb;
 921         icmd = &abtsiocb->iocb;
 922         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
 923         icmd->un.acxri.abortContextTag = cmd->ulpContext;
 924         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
 925
 926         icmd->ulpLe = 1;
 927         icmd->ulpClass = cmd->ulpClass;
 928         if (phba->hba_state >= LPFC_LINK_UP)
 929                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
 930         else
 931                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 932
 933         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
 934         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
 935                 lpfc_sli_release_iocbq(phba, abtsiocb);
 936                 ret = FAILED;
 937                 goto out;
 938         }
 939
 940         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 941                 lpfc_sli_poll_fcp_ring (phba);
 942
 943         /* Wait for abort to complete */
 944         while (lpfc_cmd->pCmd == cmnd)
 945         {
 946                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 947                         lpfc_sli_poll_fcp_ring (phba);
 948
 949                 spin_unlock_irq(phba->host->host_lock);
 950                         schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
 951                 spin_lock_irq(phba->host->host_lock);
 952                 if (++loop_count
 953                     > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
 954                         break;
 955         }
 956
 957         if (lpfc_cmd->pCmd == cmnd) {
 958                 ret = FAILED;
 959                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 960                                 "%d:0748 abort handler timed out waiting for "
 961                                 "abort to complete: ret %#x, ID %d, LUN %d, "
 962                                 "snum %#lx\n",
 963                                 phba->brd_no,  ret, cmnd->device->id,
 964                                 cmnd->device->lun, cmnd->serial_number);
 965         }
 966
 967  out:
 968         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
 969                         "%d:0749 SCSI Layer I/O Abort Request "
 970                         "Status x%x ID %d LUN %d snum %#lx\n",
 971                         phba->brd_no, ret, cmnd->device->id,
 972                         cmnd->device->lun, cmnd->serial_number);
 973
 974         spin_unlock_irq(shost->host_lock);
 975
 976         return ret;
 977 }
 978
 979 static int
 980 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 981 {
 982         struct Scsi_Host *shost = cmnd->device->host;
 983         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
 984         struct lpfc_scsi_buf *lpfc_cmd;
 985         struct lpfc_iocbq *iocbq, *iocbqrsp;
 986         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
 987         struct lpfc_nodelist *pnode = rdata->pnode;
 988         uint32_t cmd_result = 0, cmd_status = 0;
 989         int ret = FAILED;
 990         int cnt, loopcnt;
 991
 992         lpfc_block_error_handler(cmnd);
 993         spin_lock_irq(shost->host_lock);
 994         loopcnt = 0;
 995         /*
 996          * If target is not in a MAPPED state, delay the reset until
 997          * target is rediscovered or devloss timeout expires.
 998          */
 999         while ( 1 ) {
1000                 if (!pnode)
1001                         return FAILED;
1002
1003                 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1004                         spin_unlock_irq(phba->host->host_lock);
1005                         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1006                         spin_lock_irq(phba->host->host_lock);
1007                         loopcnt++;
1008                         rdata = cmnd->device->hostdata;
1009                         if (!rdata ||
1010                                 (loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
1011                                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1012                                         "%d:0721 LUN Reset rport failure:"
1013                                         " cnt x%x rdata x%p\n",
1014                                         phba->brd_no, loopcnt, rdata);
1015                                 goto out;
1016                         }
1017                         pnode = rdata->pnode;
1018                         if (!pnode)
1019                                 return FAILED;
1020                 }
1021                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1022                         break;
1023         }
1024
1025         lpfc_cmd = lpfc_get_scsi_buf (phba);
1026         if (lpfc_cmd == NULL)
1027                 goto out;
1028
1029         lpfc_cmd->timeout = 60;
1030         lpfc_cmd->scsi_hba = phba;
1031         lpfc_cmd->rdata = rdata;
1032
1033         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
1034                                            FCP_LUN_RESET);
1035         if (!ret)
1036                 goto out_free_scsi_buf;
1037
1038         iocbq = &lpfc_cmd->cur_iocbq;
1039
1040         /* get a buffer for this IOCB command response */
1041         iocbqrsp = lpfc_sli_get_iocbq(phba);
1042         if (iocbqrsp == NULL)
1043                 goto out_free_scsi_buf;
1044
1045         lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1046                         "%d:0703 Issue LUN Reset to TGT %d LUN %d "
1047                         "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
1048                         cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1049
1050         ret = lpfc_sli_issue_iocb_wait(phba,
1051                                        &phba->sli.ring[phba->sli.fcp_ring],
1052                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1053         if (ret == IOCB_SUCCESS)
1054                 ret = SUCCESS;
1055
1056
1057         cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1058         cmd_status = iocbqrsp->iocb.ulpStatus;
1059
1060         lpfc_sli_release_iocbq(phba, iocbqrsp);
1061
1062         /*
1063          * All outstanding txcmplq I/Os should have been aborted by the device.
1064          * Unfortunately, some targets do not abide by this forcing the driver
1065          * to double check.
1066          */
1067         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1068                                 cmnd->device->id, cmnd->device->lun,
1069                                 LPFC_CTX_LUN);
1070         if (cnt)
1071                 lpfc_sli_abort_iocb(phba,
1072                                     &phba->sli.ring[phba->sli.fcp_ring],
1073                                     cmnd->device->id, cmnd->device->lun,
1074                                     0, LPFC_CTX_LUN);
1075         loopcnt = 0;
1076         while(cnt) {
1077                 spin_unlock_irq(phba->host->host_lock);
1078                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1079                 spin_lock_irq(phba->host->host_lock);
1080
1081                 if (++loopcnt
1082                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1083                         break;
1084
1085                 cnt = lpfc_sli_sum_iocb(phba,
1086                                         &phba->sli.ring[phba->sli.fcp_ring],
1087                                         cmnd->device->id, cmnd->device->lun,
1088                                         LPFC_CTX_LUN);
1089         }
1090
1091         if (cnt) {
1092                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1093                         "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1094                         phba->brd_no, cnt);
1095                 ret = FAILED;
1096         }
1097
1098 out_free_scsi_buf:
1099         lpfc_release_scsi_buf(phba, lpfc_cmd);
1100
1101         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1102                         "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1103                         "Data: x%x x%x x%x\n",
1104                         phba->brd_no, cmnd->device->id,cmnd->device->lun,
1105                         ret, cmd_status, cmd_result);
1106
1107 out:
1108         spin_unlock_irq(shost->host_lock);
1109         return ret;
1110 }
1111
1112 static int
1113 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1114 {
1115         struct Scsi_Host *shost = cmnd->device->host;
1116         struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
1117         struct lpfc_nodelist *ndlp = NULL;
1118         int match;
1119         int ret = FAILED, i, err_count = 0;
1120         int cnt, loopcnt;
1121         struct lpfc_scsi_buf * lpfc_cmd;
1122
1123         lpfc_block_error_handler(cmnd);
1124         spin_lock_irq(shost->host_lock);
1125
1126         lpfc_cmd = lpfc_get_scsi_buf(phba);
1127         if (lpfc_cmd == NULL)
1128                 goto out;
1129
1130         /* The lpfc_cmd storage is reused.  Set all loop invariants. */
1131         lpfc_cmd->timeout = 60;
1132         lpfc_cmd->scsi_hba = phba;
1133
1134         /*
1135          * Since the driver manages a single bus device, reset all
1136          * targets known to the driver.  Should any target reset
1137          * fail, this routine returns failure to the midlayer.
1138          */
1139         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1140                 /* Search the mapped list for this target ID */
1141                 match = 0;
1142                 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1143                         if ((i == ndlp->nlp_sid) && ndlp->rport) {
1144                                 match = 1;
1145                                 break;
1146                         }
1147                 }
1148                 if (!match)
1149                         continue;
1150
1151                 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
1152                                           ndlp->rport->dd_data);
1153                 if (ret != SUCCESS) {
1154                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1155                                 "%d:0700 Bus Reset on target %d failed\n",
1156                                 phba->brd_no, i);
1157                         err_count++;
1158                 }
1159         }
1160
1161         if (err_count == 0)
1162                 ret = SUCCESS;
1163
1164         lpfc_release_scsi_buf(phba, lpfc_cmd);
1165
1166         /*
1167          * All outstanding txcmplq I/Os should have been aborted by
1168          * the targets.  Unfortunately, some targets do not abide by
1169          * this forcing the driver to double check.
1170          */
1171         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1172                                 0, 0, LPFC_CTX_HOST);
1173         if (cnt)
1174                 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1175                                     0, 0, 0, LPFC_CTX_HOST);
1176         loopcnt = 0;
1177         while(cnt) {
1178                 spin_unlock_irq(phba->host->host_lock);
1179                 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1180                 spin_lock_irq(phba->host->host_lock);
1181
1182                 if (++loopcnt
1183                     > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1184                         break;
1185
1186                 cnt = lpfc_sli_sum_iocb(phba,
1187                                         &phba->sli.ring[phba->sli.fcp_ring],
1188                                         0, 0, LPFC_CTX_HOST);
1189         }
1190
1191         if (cnt) {
1192                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1193                    "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1194                    phba->brd_no, cnt, i);
1195                 ret = FAILED;
1196         }
1197
1198         lpfc_printf_log(phba,
1199                         KERN_ERR,
1200                         LOG_FCP,
1201                         "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1202                         phba->brd_no, ret);
1203 out:
1204         spin_unlock_irq(shost->host_lock);
1205         return ret;
1206 }
1207
1208 static int
1209 lpfc_slave_alloc(struct scsi_device *sdev)
1210 {
1211         struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
1212         struct lpfc_scsi_buf *scsi_buf = NULL;
1213         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1214         uint32_t total = 0, i;
1215         uint32_t num_to_alloc = 0;
1216         unsigned long flags;
1217
1218         if (!rport || fc_remote_port_chkready(rport))
1219                 return -ENXIO;
1220
1221         sdev->hostdata = rport->dd_data;
1222
1223         /*
1224          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1225          * available list of scsi buffers.  Don't allocate more than the
1226          * HBA limit conveyed to the midlayer via the host structure.  The
1227          * formula accounts for the lun_queue_depth + error handlers + 1
1228          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1229          */
1230         total = phba->total_scsi_bufs;
1231         num_to_alloc = phba->cfg_lun_queue_depth + 2;
1232         if (total >= phba->cfg_hba_queue_depth) {
1233                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1234                                 "%d:0704 At limitation of %d preallocated "
1235                                 "command buffers\n", phba->brd_no, total);
1236                 return 0;
1237         } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1238                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1239                                 "%d:0705 Allocation request of %d command "
1240                                 "buffers will exceed max of %d.  Reducing "
1241                                 "allocation request to %d.\n", phba->brd_no,
1242                                 num_to_alloc, phba->cfg_hba_queue_depth,
1243                                 (phba->cfg_hba_queue_depth - total));
1244                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1245         }
1246
1247         for (i = 0; i < num_to_alloc; i++) {
1248                 scsi_buf = lpfc_new_scsi_buf(phba);
1249                 if (!scsi_buf) {
1250                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1251                                         "%d:0706 Failed to allocate command "
1252                                         "buffer\n", phba->brd_no);
1253                         break;
1254                 }
1255
1256                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1257                 phba->total_scsi_bufs++;
1258                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1259                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1260         }
1261         return 0;
1262 }
1263
1264 static int
1265 lpfc_slave_configure(struct scsi_device *sdev)
1266 {
1267         struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
1268         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1269
1270         if (sdev->tagged_supported)
1271                 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1272         else
1273                 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1274
1275         /*
1276          * Initialize the fc transport attributes for the target
1277          * containing this scsi device.  Also note that the driver's
1278          * target pointer is stored in the starget_data for the
1279          * driver's sysfs entry point functions.
1280          */
1281         rport->dev_loss_tmo = phba->cfg_devloss_tmo;
1282
1283         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1284                 lpfc_sli_poll_fcp_ring(phba);
1285                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1286                         lpfc_poll_rearm_timer(phba);
1287         }
1288
1289         return 0;
1290 }
1291
1292 static void
1293 lpfc_slave_destroy(struct scsi_device *sdev)
1294 {
1295         sdev->hostdata = NULL;
1296         return;
1297 }
1298
1299 struct scsi_host_template lpfc_template = {
1300         .module                 = THIS_MODULE,
1301         .name                   = LPFC_DRIVER_NAME,
1302         .info                   = lpfc_info,
1303         .queuecommand           = lpfc_queuecommand,
1304         .eh_abort_handler       = lpfc_abort_handler,
1305         .eh_device_reset_handler= lpfc_reset_lun_handler,
1306         .eh_bus_reset_handler   = lpfc_reset_bus_handler,
1307         .slave_alloc            = lpfc_slave_alloc,
1308         .slave_configure        = lpfc_slave_configure,
1309         .slave_destroy          = lpfc_slave_destroy,
1310         .this_id                = -1,
1311         .sg_tablesize           = LPFC_SG_SEG_CNT,
1312         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1313         .use_clustering         = ENABLE_CLUSTERING,
1314         .shost_attrs            = lpfc_host_attrs,
1315         .max_sectors            = 0xFFFF,
1316 };