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) 2004-2008 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 #include "lpfc_vport.h"
  41
  42 #define LPFC_RESET_WAIT  2
  43 #define LPFC_ABORT_WAIT  2
  44
  45 /*
  46  * This function is called with no lock held when there is a resource
  47  * error in driver or in firmware.
  48  */
  49 void
  50 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
  51 {
  52         unsigned long flags;
  53         uint32_t evt_posted;
  54
  55         spin_lock_irqsave(&phba->hbalock, flags);
  56         atomic_inc(&phba->num_rsrc_err);
  57         phba->last_rsrc_error_time = jiffies;
  58
  59         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
  60                 spin_unlock_irqrestore(&phba->hbalock, flags);
  61                 return;
  62         }
  63
  64         phba->last_ramp_down_time = jiffies;
  65
  66         spin_unlock_irqrestore(&phba->hbalock, flags);
  67
  68         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
  69         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
  70         if (!evt_posted)
  71                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
  72         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
  73
  74         if (!evt_posted)
  75                 lpfc_worker_wake_up(phba);
  76         return;
  77 }
  78
  79 /*
  80  * This function is called with no lock held when there is a successful
  81  * SCSI command completion.
  82  */
  83 static inline void
  84 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
  85                         struct scsi_device *sdev)
  86 {
  87         unsigned long flags;
  88         struct lpfc_hba *phba = vport->phba;
  89         uint32_t evt_posted;
  90         atomic_inc(&phba->num_cmd_success);
  91
  92         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
  93                 return;
  94         spin_lock_irqsave(&phba->hbalock, flags);
  95         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
  96          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
  97                 spin_unlock_irqrestore(&phba->hbalock, flags);
  98                 return;
  99         }
 100         phba->last_ramp_up_time = jiffies;
 101         spin_unlock_irqrestore(&phba->hbalock, flags);
 102
 103         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 104         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 105         if (!evt_posted)
 106                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 107         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 108
 109         if (!evt_posted)
 110                 lpfc_worker_wake_up(phba);
 111         return;
 112 }
 113
 114 void
 115 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 116 {
 117         struct lpfc_vport **vports;
 118         struct Scsi_Host  *shost;
 119         struct scsi_device *sdev;
 120         unsigned long new_queue_depth;
 121         unsigned long num_rsrc_err, num_cmd_success;
 122         int i;
 123
 124         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 125         num_cmd_success = atomic_read(&phba->num_cmd_success);
 126
 127         vports = lpfc_create_vport_work_array(phba);
 128         if (vports != NULL)
 129                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 130                         shost = lpfc_shost_from_vport(vports[i]);
 131                         shost_for_each_device(sdev, shost) {
 132                                 new_queue_depth =
 133                                         sdev->queue_depth * num_rsrc_err /
 134                                         (num_rsrc_err + num_cmd_success);
 135                                 if (!new_queue_depth)
 136                                         new_queue_depth = sdev->queue_depth - 1;
 137                                 else
 138                                         new_queue_depth = sdev->queue_depth -
 139                                                                 new_queue_depth;
 140                                 if (sdev->ordered_tags)
 141                                         scsi_adjust_queue_depth(sdev,
 142                                                         MSG_ORDERED_TAG,
 143                                                         new_queue_depth);
 144                                 else
 145                                         scsi_adjust_queue_depth(sdev,
 146                                                         MSG_SIMPLE_TAG,
 147                                                         new_queue_depth);
 148                         }
 149                 }
 150         lpfc_destroy_vport_work_array(phba, vports);
 151         atomic_set(&phba->num_rsrc_err, 0);
 152         atomic_set(&phba->num_cmd_success, 0);
 153 }
 154
 155 void
 156 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 157 {
 158         struct lpfc_vport **vports;
 159         struct Scsi_Host  *shost;
 160         struct scsi_device *sdev;
 161         int i;
 162
 163         vports = lpfc_create_vport_work_array(phba);
 164         if (vports != NULL)
 165                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 166                         shost = lpfc_shost_from_vport(vports[i]);
 167                         shost_for_each_device(sdev, shost) {
 168                                 if (vports[i]->cfg_lun_queue_depth <=
 169                                     sdev->queue_depth)
 170                                         continue;
 171                                 if (sdev->ordered_tags)
 172                                         scsi_adjust_queue_depth(sdev,
 173                                                         MSG_ORDERED_TAG,
 174                                                         sdev->queue_depth+1);
 175                                 else
 176                                         scsi_adjust_queue_depth(sdev,
 177                                                         MSG_SIMPLE_TAG,
 178                                                         sdev->queue_depth+1);
 179                         }
 180                 }
 181         lpfc_destroy_vport_work_array(phba, vports);
 182         atomic_set(&phba->num_rsrc_err, 0);
 183         atomic_set(&phba->num_cmd_success, 0);
 184 }
 185
 186 /**
 187  * lpfc_scsi_dev_block: set all scsi hosts to block state.
 188  * @phba: Pointer to HBA context object.
 189  *
 190  * This function walks vport list and set each SCSI host to block state
 191  * by invoking fc_remote_port_delete() routine. This function is invoked
 192  * with EEH when device's PCI slot has been permanently disabled.
 193  **/
 194 void
 195 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 196 {
 197         struct lpfc_vport **vports;
 198         struct Scsi_Host  *shost;
 199         struct scsi_device *sdev;
 200         struct fc_rport *rport;
 201         int i;
 202
 203         vports = lpfc_create_vport_work_array(phba);
 204         if (vports != NULL)
 205                 for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 206                         shost = lpfc_shost_from_vport(vports[i]);
 207                         shost_for_each_device(sdev, shost) {
 208                                 rport = starget_to_rport(scsi_target(sdev));
 209                                 fc_remote_port_delete(rport);
 210                         }
 211                 }
 212         lpfc_destroy_vport_work_array(phba, vports);
 213 }
 214
 215 /*
 216  * This routine allocates a scsi buffer, which contains all the necessary
 217  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 218  * contains information to build the IOCB.  The DMAable region contains
 219  * memory for the FCP CMND, FCP RSP, and the inital BPL.  In addition to
 220  * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 221  * and the BPL BDE is setup in the IOCB.
 222  */
 223 static struct lpfc_scsi_buf *
 224 lpfc_new_scsi_buf(struct lpfc_vport *vport)
 225 {
 226         struct lpfc_hba *phba = vport->phba;
 227         struct lpfc_scsi_buf *psb;
 228         struct ulp_bde64 *bpl;
 229         IOCB_t *iocb;
 230         dma_addr_t pdma_phys_fcp_cmd;
 231         dma_addr_t pdma_phys_fcp_rsp;
 232         dma_addr_t pdma_phys_bpl;
 233         uint16_t iotag;
 234
 235         psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 236         if (!psb)
 237                 return NULL;
 238
 239         /*
 240          * Get memory from the pci pool to map the virt space to pci bus space
 241          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
 242          * struct fcp_rsp and the number of bde's necessary to support the
 243          * sg_tablesize.
 244          */
 245         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
 246                                                         &psb->dma_handle);
 247         if (!psb->data) {
 248                 kfree(psb);
 249                 return NULL;
 250         }
 251
 252         /* Initialize virtual ptrs to dma_buf region. */
 253         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 254
 255         /* Allocate iotag for psb->cur_iocbq. */
 256         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 257         if (iotag == 0) {
 258                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 259                               psb->data, psb->dma_handle);
 260                 kfree (psb);
 261                 return NULL;
 262         }
 263         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 264
 265         psb->fcp_cmnd = psb->data;
 266         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 267         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 268                                                         sizeof(struct fcp_rsp);
 269
 270         /* Initialize local short-hand pointers. */
 271         bpl = psb->fcp_bpl;
 272         pdma_phys_fcp_cmd = psb->dma_handle;
 273         pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 274         pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 275                         sizeof(struct fcp_rsp);
 276
 277         /*
 278          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 279          * list bdes.  Initialize the first two and leave the rest for
 280          * queuecommand.
 281          */
 282         bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 283         bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 284         bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 285         bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 286         bpl[0].tus.w = le32_to_cpu(bpl->tus.w);
 287
 288         /* Setup the physical region for the FCP RSP */
 289         bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 290         bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 291         bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 292         bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 293         bpl[1].tus.w = le32_to_cpu(bpl->tus.w);
 294
 295         /*
 296          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 297          * initialize it with all known data now.
 298          */
 299         iocb = &psb->cur_iocbq.iocb;
 300         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 301         if (phba->sli_rev == 3) {
 302                 /* fill in immediate fcp command BDE */
 303                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 304                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 305                 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 306                                                        unsli3.fcp_ext.icd);
 307                 iocb->un.fcpi64.bdl.addrHigh = 0;
 308                 iocb->ulpBdeCount = 0;
 309                 iocb->ulpLe = 0;
 310                 /* fill in responce BDE */
 311                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 312                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 313                                                 sizeof(struct fcp_rsp);
 314                 iocb->unsli3.fcp_ext.rbde.addrLow =
 315                                                 putPaddrLow(pdma_phys_fcp_rsp);
 316                 iocb->unsli3.fcp_ext.rbde.addrHigh =
 317                                                 putPaddrHigh(pdma_phys_fcp_rsp);
 318         } else {
 319                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 320                 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
 321                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_bpl);
 322                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_bpl);
 323                 iocb->ulpBdeCount = 1;
 324                 iocb->ulpLe = 1;
 325         }
 326         iocb->ulpClass = CLASS3;
 327
 328         return psb;
 329 }
 330
 331 static struct lpfc_scsi_buf*
 332 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 333 {
 334         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 335         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 336         unsigned long iflag = 0;
 337
 338         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 339         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 340         if (lpfc_cmd) {
 341                 lpfc_cmd->seg_cnt = 0;
 342                 lpfc_cmd->nonsg_phys = 0;
 343         }
 344         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 345         return  lpfc_cmd;
 346 }
 347
 348 static void
 349 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 350 {
 351         unsigned long iflag = 0;
 352
 353         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 354         psb->pCmd = NULL;
 355         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 356         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 357 }
 358
 359 static int
 360 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 361 {
 362         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 363         struct scatterlist *sgel = NULL;
 364         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 365         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 366         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 367         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
 368         dma_addr_t physaddr;
 369         uint32_t num_bde = 0;
 370         int nseg, datadir = scsi_cmnd->sc_data_direction;
 371
 372         /*
 373          * There are three possibilities here - use scatter-gather segment, use
 374          * the single mapping, or neither.  Start the lpfc command prep by
 375          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 376          * data bde entry.
 377          */
 378         bpl += 2;
 379         if (scsi_sg_count(scsi_cmnd)) {
 380                 /*
 381                  * The driver stores the segment count returned from pci_map_sg
 382                  * because this a count of dma-mappings used to map the use_sg
 383                  * pages.  They are not guaranteed to be the same for those
 384                  * architectures that implement an IOMMU.
 385                  */
 386
 387                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 388                                   scsi_sg_count(scsi_cmnd), datadir);
 389                 if (unlikely(!nseg))
 390                         return 1;
 391
 392                 lpfc_cmd->seg_cnt = nseg;
 393                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 394                         printk(KERN_ERR "%s: Too many sg segments from "
 395                                "dma_map_sg.  Config %d, seg_cnt %d",
 396                                __func__, phba->cfg_sg_seg_cnt,
 397                                lpfc_cmd->seg_cnt);
 398                         scsi_dma_unmap(scsi_cmnd);
 399                         return 1;
 400                 }
 401
 402                 /*
 403                  * The driver established a maximum scatter-gather segment count
 404                  * during probe that limits the number of sg elements in any
 405                  * single scsi command.  Just run through the seg_cnt and format
 406                  * the bde's.
 407                  * When using SLI-3 the driver will try to fit all the BDEs into
 408                  * the IOCB. If it can't then the BDEs get added to a BPL as it
 409                  * does for SLI-2 mode.
 410                  */
 411                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
 412                         physaddr = sg_dma_address(sgel);
 413                         if (phba->sli_rev == 3 &&
 414                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
 415                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 416                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
 417                                 data_bde->addrLow = putPaddrLow(physaddr);
 418                                 data_bde->addrHigh = putPaddrHigh(physaddr);
 419                                 data_bde++;
 420                         } else {
 421                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 422                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
 423                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 424                                 bpl->addrLow =
 425                                         le32_to_cpu(putPaddrLow(physaddr));
 426                                 bpl->addrHigh =
 427                                         le32_to_cpu(putPaddrHigh(physaddr));
 428                                 bpl++;
 429                         }
 430                 }
 431         }
 432
 433         /*
 434          * Finish initializing those IOCB fields that are dependent on the
 435          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
 436          * explicitly reinitialized and for SLI-3 the extended bde count is
 437          * explicitly reinitialized since all iocb memory resources are reused.
 438          */
 439         if (phba->sli_rev == 3) {
 440                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
 441                         /*
 442                          * The extended IOCB format can only fit 3 BDE or a BPL.
 443                          * This I/O has more than 3 BDE so the 1st data bde will
 444                          * be a BPL that is filled in here.
 445                          */
 446                         physaddr = lpfc_cmd->dma_handle;
 447                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
 448                         data_bde->tus.f.bdeSize = (num_bde *
 449                                                    sizeof(struct ulp_bde64));
 450                         physaddr += (sizeof(struct fcp_cmnd) +
 451                                      sizeof(struct fcp_rsp) +
 452                                      (2 * sizeof(struct ulp_bde64)));
 453                         data_bde->addrHigh = putPaddrHigh(physaddr);
 454                         data_bde->addrLow = putPaddrLow(physaddr);
 455                         /* ebde count includes the responce bde and data bpl */
 456                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
 457                 } else {
 458                         /* ebde count includes the responce bde and data bdes */
 459                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 460                 }
 461         } else {
 462                 iocb_cmd->un.fcpi64.bdl.bdeSize =
 463                         ((num_bde + 2) * sizeof(struct ulp_bde64));
 464         }
 465         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 466         return 0;
 467 }
 468
 469 static void
 470 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 471 {
 472         /*
 473          * There are only two special cases to consider.  (1) the scsi command
 474          * requested scatter-gather usage or (2) the scsi command allocated
 475          * a request buffer, but did not request use_sg.  There is a third
 476          * case, but it does not require resource deallocation.
 477          */
 478         if (psb->seg_cnt > 0)
 479                 scsi_dma_unmap(psb->pCmd);
 480 }
 481
 482 static void
 483 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 484                     struct lpfc_iocbq *rsp_iocb)
 485 {
 486         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 487         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 488         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 489         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 490         uint32_t resp_info = fcprsp->rspStatus2;
 491         uint32_t scsi_status = fcprsp->rspStatus3;
 492         uint32_t *lp;
 493         uint32_t host_status = DID_OK;
 494         uint32_t rsplen = 0;
 495         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 496
 497         /*
 498          *  If this is a task management command, there is no
 499          *  scsi packet associated with this lpfc_cmd.  The driver
 500          *  consumes it.
 501          */
 502         if (fcpcmd->fcpCntl2) {
 503                 scsi_status = 0;
 504                 goto out;
 505         }
 506
 507         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 508                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 509                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 510                         snslen = SCSI_SENSE_BUFFERSIZE;
 511
 512                 if (resp_info & RSP_LEN_VALID)
 513                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 514                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 515         }
 516         lp = (uint32_t *)cmnd->sense_buffer;
 517
 518         if (!scsi_status && (resp_info & RESID_UNDER))
 519                 logit = LOG_FCP;
 520
 521         lpfc_printf_vlog(vport, KERN_WARNING, logit,
 522                          "0730 FCP command x%x failed: x%x SNS x%x x%x "
 523                          "Data: x%x x%x x%x x%x x%x\n",
 524                          cmnd->cmnd[0], scsi_status,
 525                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 526                          be32_to_cpu(fcprsp->rspResId),
 527                          be32_to_cpu(fcprsp->rspSnsLen),
 528                          be32_to_cpu(fcprsp->rspRspLen),
 529                          fcprsp->rspInfo3);
 530
 531         if (resp_info & RSP_LEN_VALID) {
 532                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 533                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 534                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 535                         host_status = DID_ERROR;
 536                         goto out;
 537                 }
 538         }
 539
 540         scsi_set_resid(cmnd, 0);
 541         if (resp_info & RESID_UNDER) {
 542                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 543
 544                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 545                                  "0716 FCP Read Underrun, expected %d, "
 546                                  "residual %d Data: x%x x%x x%x\n",
 547                                  be32_to_cpu(fcpcmd->fcpDl),
 548                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
 549                                  cmnd->underflow);
 550
 551                 /*
 552                  * If there is an under run check if under run reported by
 553                  * storage array is same as the under run reported by HBA.
 554                  * If this is not same, there is a dropped frame.
 555                  */
 556                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 557                         fcpi_parm &&
 558                         (scsi_get_resid(cmnd) != fcpi_parm)) {
 559                         lpfc_printf_vlog(vport, KERN_WARNING,
 560                                          LOG_FCP | LOG_FCP_ERROR,
 561                                          "0735 FCP Read Check Error "
 562                                          "and Underrun Data: x%x x%x x%x x%x\n",
 563                                          be32_to_cpu(fcpcmd->fcpDl),
 564                                          scsi_get_resid(cmnd), fcpi_parm,
 565                                          cmnd->cmnd[0]);
 566                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 567                         host_status = DID_ERROR;
 568                 }
 569                 /*
 570                  * The cmnd->underflow is the minimum number of bytes that must
 571                  * be transfered for this command.  Provided a sense condition
 572                  * is not present, make sure the actual amount transferred is at
 573                  * least the underflow value or fail.
 574                  */
 575                 if (!(resp_info & SNS_LEN_VALID) &&
 576                     (scsi_status == SAM_STAT_GOOD) &&
 577                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
 578                      < cmnd->underflow)) {
 579                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 580                                          "0717 FCP command x%x residual "
 581                                          "underrun converted to error "
 582                                          "Data: x%x x%x x%x\n",
 583                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
 584                                          scsi_get_resid(cmnd), cmnd->underflow);
 585                         host_status = DID_ERROR;
 586                 }
 587         } else if (resp_info & RESID_OVER) {
 588                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 589                                  "0720 FCP command x%x residual overrun error. "
 590                                  "Data: x%x x%x \n", cmnd->cmnd[0],
 591                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
 592                 host_status = DID_ERROR;
 593
 594         /*
 595          * Check SLI validation that all the transfer was actually done
 596          * (fcpi_parm should be zero). Apply check only to reads.
 597          */
 598         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 599                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 600                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 601                                  "0734 FCP Read Check Error Data: "
 602                                  "x%x x%x x%x x%x\n",
 603                                  be32_to_cpu(fcpcmd->fcpDl),
 604                                  be32_to_cpu(fcprsp->rspResId),
 605                                  fcpi_parm, cmnd->cmnd[0]);
 606                 host_status = DID_ERROR;
 607                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 608         }
 609
 610  out:
 611         cmnd->result = ScsiResult(host_status, scsi_status);
 612 }
 613
 614 static void
 615 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 616                         struct lpfc_iocbq *pIocbOut)
 617 {
 618         struct lpfc_scsi_buf *lpfc_cmd =
 619                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 620         struct lpfc_vport      *vport = pIocbIn->vport;
 621         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 622         struct lpfc_nodelist *pnode = rdata->pnode;
 623         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 624         int result;
 625         struct scsi_device *sdev, *tmp_sdev;
 626         int depth = 0;
 627         unsigned long flags;
 628
 629         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 630         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 631         atomic_dec(&pnode->cmd_pending);
 632
 633         if (lpfc_cmd->status) {
 634                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 635                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 636                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 637                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 638                         lpfc_cmd->status = IOSTAT_DEFAULT;
 639
 640                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 641                                  "0729 FCP cmd x%x failed <%d/%d> "
 642                                  "status: x%x result: x%x Data: x%x x%x\n",
 643                                  cmd->cmnd[0],
 644                                  cmd->device ? cmd->device->id : 0xffff,
 645                                  cmd->device ? cmd->device->lun : 0xffff,
 646                                  lpfc_cmd->status, lpfc_cmd->result,
 647                                  pIocbOut->iocb.ulpContext,
 648                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 649
 650                 switch (lpfc_cmd->status) {
 651                 case IOSTAT_FCP_RSP_ERROR:
 652                         /* Call FCP RSP handler to determine result */
 653                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 654                         break;
 655                 case IOSTAT_NPORT_BSY:
 656                 case IOSTAT_FABRIC_BSY:
 657                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
 658                         break;
 659                 case IOSTAT_LOCAL_REJECT:
 660                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
 661                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
 662                             lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
 663                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
 664                                 break;
 665                         } /* else: fall through */
 666                 default:
 667                         cmd->result = ScsiResult(DID_ERROR, 0);
 668                         break;
 669                 }
 670
 671                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
 672                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
 673                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
 674                                                  SAM_STAT_BUSY);
 675         } else {
 676                 cmd->result = ScsiResult(DID_OK, 0);
 677         }
 678
 679         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
 680                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 681
 682                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 683                                  "0710 Iodone <%d/%d> cmd %p, error "
 684                                  "x%x SNS x%x x%x Data: x%x x%x\n",
 685                                  cmd->device->id, cmd->device->lun, cmd,
 686                                  cmd->result, *lp, *(lp + 3), cmd->retries,
 687                                  scsi_get_resid(cmd));
 688         }
 689
 690         result = cmd->result;
 691         sdev = cmd->device;
 692         if (vport->cfg_max_scsicmpl_time &&
 693            time_after(jiffies, lpfc_cmd->start_time +
 694                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
 695                 spin_lock_irqsave(sdev->host->host_lock, flags);
 696                 if ((pnode->cmd_qdepth > atomic_read(&pnode->cmd_pending) &&
 697                     (atomic_read(&pnode->cmd_pending) > LPFC_MIN_TGT_QDEPTH) &&
 698                     ((cmd->cmnd[0] == READ_10) || (cmd->cmnd[0] == WRITE_10))))
 699                         pnode->cmd_qdepth = atomic_read(&pnode->cmd_pending);
 700
 701                 pnode->last_change_time = jiffies;
 702                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 703         } else if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
 704                    time_after(jiffies, pnode->last_change_time +
 705                         msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
 706                 spin_lock_irqsave(sdev->host->host_lock, flags);
 707                 pnode->cmd_qdepth += pnode->cmd_qdepth *
 708                         LPFC_TGTQ_RAMPUP_PCENT / 100;
 709                 if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
 710                         pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
 711                 pnode->last_change_time = jiffies;
 712                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 713         }
 714
 715         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 716         cmd->scsi_done(cmd);
 717
 718         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
 719                 /*
 720                  * If there is a thread waiting for command completion
 721                  * wake up the thread.
 722                  */
 723                 spin_lock_irqsave(sdev->host->host_lock, flags);
 724                 lpfc_cmd->pCmd = NULL;
 725                 if (lpfc_cmd->waitq)
 726                         wake_up(lpfc_cmd->waitq);
 727                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
 728                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 729                 return;
 730         }
 731
 732
 733         if (!result)
 734                 lpfc_rampup_queue_depth(vport, sdev);
 735
 736         if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
 737            ((jiffies - pnode->last_ramp_up_time) >
 738                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 739            ((jiffies - pnode->last_q_full_time) >
 740                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 741            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
 742                 shost_for_each_device(tmp_sdev, sdev->host) {
 743                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
 744                                 if (tmp_sdev->id != sdev->id)
 745                                         continue;
 746                                 if (tmp_sdev->ordered_tags)
 747                                         scsi_adjust_queue_depth(tmp_sdev,
 748                                                 MSG_ORDERED_TAG,
 749                                                 tmp_sdev->queue_depth+1);
 750                                 else
 751                                         scsi_adjust_queue_depth(tmp_sdev,
 752                                                 MSG_SIMPLE_TAG,
 753                                                 tmp_sdev->queue_depth+1);
 754
 755                                 pnode->last_ramp_up_time = jiffies;
 756                         }
 757                 }
 758         }
 759
 760         /*
 761          * Check for queue full.  If the lun is reporting queue full, then
 762          * back off the lun queue depth to prevent target overloads.
 763          */
 764         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
 765             NLP_CHK_NODE_ACT(pnode)) {
 766                 pnode->last_q_full_time = jiffies;
 767
 768                 shost_for_each_device(tmp_sdev, sdev->host) {
 769                         if (tmp_sdev->id != sdev->id)
 770                                 continue;
 771                         depth = scsi_track_queue_full(tmp_sdev,
 772                                         tmp_sdev->queue_depth - 1);
 773                 }
 774                 /*
 775                  * The queue depth cannot be lowered any more.
 776                  * Modify the returned error code to store
 777                  * the final depth value set by
 778                  * scsi_track_queue_full.
 779                  */
 780                 if (depth == -1)
 781                         depth = sdev->host->cmd_per_lun;
 782
 783                 if (depth) {
 784                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 785                                          "0711 detected queue full - lun queue "
 786                                          "depth adjusted to %d.\n", depth);
 787                 }
 788         }
 789
 790         /*
 791          * If there is a thread waiting for command completion
 792          * wake up the thread.
 793          */
 794         spin_lock_irqsave(sdev->host->host_lock, flags);
 795         lpfc_cmd->pCmd = NULL;
 796         if (lpfc_cmd->waitq)
 797                 wake_up(lpfc_cmd->waitq);
 798         spin_unlock_irqrestore(sdev->host->host_lock, flags);
 799
 800         lpfc_release_scsi_buf(phba, lpfc_cmd);
 801 }
 802
 803 /**
 804  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB.
 805  * @data: A pointer to the immediate command data portion of the IOCB.
 806  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
 807  *
 808  * The routine copies the entire FCP command from @fcp_cmnd to @data while
 809  * byte swapping the data to big endian format for transmission on the wire.
 810  **/
 811 static void
 812 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
 813 {
 814         int i, j;
 815         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
 816              i += sizeof(uint32_t), j++) {
 817                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
 818         }
 819 }
 820
 821 static void
 822 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 823                     struct lpfc_nodelist *pnode)
 824 {
 825         struct lpfc_hba *phba = vport->phba;
 826         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 827         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 828         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 829         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
 830         int datadir = scsi_cmnd->sc_data_direction;
 831         char tag[2];
 832
 833         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
 834                 return;
 835
 836         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
 837         /* clear task management bits */
 838         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 839
 840         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
 841                         &lpfc_cmd->fcp_cmnd->fcp_lun);
 842
 843         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
 844
 845         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
 846                 switch (tag[0]) {
 847                 case HEAD_OF_QUEUE_TAG:
 848                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
 849                         break;
 850                 case ORDERED_QUEUE_TAG:
 851                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
 852                         break;
 853                 default:
 854                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 855                         break;
 856                 }
 857         } else
 858                 fcp_cmnd->fcpCntl1 = 0;
 859
 860         /*
 861          * There are three possibilities here - use scatter-gather segment, use
 862          * the single mapping, or neither.  Start the lpfc command prep by
 863          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 864          * data bde entry.
 865          */
 866         if (scsi_sg_count(scsi_cmnd)) {
 867                 if (datadir == DMA_TO_DEVICE) {
 868                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
 869                         iocb_cmd->un.fcpi.fcpi_parm = 0;
 870                         iocb_cmd->ulpPU = 0;
 871                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
 872                         phba->fc4OutputRequests++;
 873                 } else {
 874                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
 875                         iocb_cmd->ulpPU = PARM_READ_CHECK;
 876                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 877                         fcp_cmnd->fcpCntl3 = READ_DATA;
 878                         phba->fc4InputRequests++;
 879                 }
 880         } else {
 881                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
 882                 iocb_cmd->un.fcpi.fcpi_parm = 0;
 883                 iocb_cmd->ulpPU = 0;
 884                 fcp_cmnd->fcpCntl3 = 0;
 885                 phba->fc4ControlRequests++;
 886         }
 887         if (phba->sli_rev == 3)
 888                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
 889         /*
 890          * Finish initializing those IOCB fields that are independent
 891          * of the scsi_cmnd request_buffer
 892          */
 893         piocbq->iocb.ulpContext = pnode->nlp_rpi;
 894         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
 895                 piocbq->iocb.ulpFCP2Rcvy = 1;
 896         else
 897                 piocbq->iocb.ulpFCP2Rcvy = 0;
 898
 899         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
 900         piocbq->context1  = lpfc_cmd;
 901         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
 902         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
 903         piocbq->vport = vport;
 904 }
 905
 906 static int
 907 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
 908                              struct lpfc_scsi_buf *lpfc_cmd,
 909                              unsigned int lun,
 910                              uint8_t task_mgmt_cmd)
 911 {
 912         struct lpfc_iocbq *piocbq;
 913         IOCB_t *piocb;
 914         struct fcp_cmnd *fcp_cmnd;
 915         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 916         struct lpfc_nodelist *ndlp = rdata->pnode;
 917
 918         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
 919             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
 920                 return 0;
 921
 922         piocbq = &(lpfc_cmd->cur_iocbq);
 923         piocbq->vport = vport;
 924
 925         piocb = &piocbq->iocb;
 926
 927         fcp_cmnd = lpfc_cmd->fcp_cmnd;
 928         /* Clear out any old data in the FCP command area */
 929         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
 930         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
 931         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 932         if (vport->phba->sli_rev == 3)
 933                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
 934         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
 935         piocb->ulpContext = ndlp->nlp_rpi;
 936         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 937                 piocb->ulpFCP2Rcvy = 1;
 938         }
 939         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
 940
 941         /* ulpTimeout is only one byte */
 942         if (lpfc_cmd->timeout > 0xff) {
 943                 /*
 944                  * Do not timeout the command at the firmware level.
 945                  * The driver will provide the timeout mechanism.
 946                  */
 947                 piocb->ulpTimeout = 0;
 948         } else {
 949                 piocb->ulpTimeout = lpfc_cmd->timeout;
 950         }
 951
 952         return 1;
 953 }
 954
 955 static void
 956 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 957                         struct lpfc_iocbq *cmdiocbq,
 958                         struct lpfc_iocbq *rspiocbq)
 959 {
 960         struct lpfc_scsi_buf *lpfc_cmd =
 961                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
 962         if (lpfc_cmd)
 963                 lpfc_release_scsi_buf(phba, lpfc_cmd);
 964         return;
 965 }
 966
 967 static int
 968 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
 969                     unsigned  tgt_id, unsigned int lun,
 970                     struct lpfc_rport_data *rdata)
 971 {
 972         struct lpfc_hba   *phba = vport->phba;
 973         struct lpfc_iocbq *iocbq;
 974         struct lpfc_iocbq *iocbqrsp;
 975         int ret;
 976         int status;
 977
 978         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
 979                 return FAILED;
 980
 981         lpfc_cmd->rdata = rdata;
 982         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
 983                                            FCP_TARGET_RESET);
 984         if (!status)
 985                 return FAILED;
 986
 987         iocbq = &lpfc_cmd->cur_iocbq;
 988         iocbqrsp = lpfc_sli_get_iocbq(phba);
 989
 990         if (!iocbqrsp)
 991                 return FAILED;
 992
 993         /* Issue Target Reset to TGT <num> */
 994         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 995                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
 996                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 997         status = lpfc_sli_issue_iocb_wait(phba,
 998                                        &phba->sli.ring[phba->sli.fcp_ring],
 999                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1000         if (status != IOCB_SUCCESS) {
1001                 if (status == IOCB_TIMEDOUT) {
1002                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1003                         ret = TIMEOUT_ERROR;
1004                 } else
1005                         ret = FAILED;
1006                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1007         } else {
1008                 ret = SUCCESS;
1009                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
1010                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1011                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
1012                         (lpfc_cmd->result & IOERR_DRVR_MASK))
1013                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1014         }
1015
1016         lpfc_sli_release_iocbq(phba, iocbqrsp);
1017         return ret;
1018 }
1019
1020 const char *
1021 lpfc_info(struct Scsi_Host *host)
1022 {
1023         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
1024         struct lpfc_hba   *phba = vport->phba;
1025         int len;
1026         static char  lpfcinfobuf[384];
1027
1028         memset(lpfcinfobuf,0,384);
1029         if (phba && phba->pcidev){
1030                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
1031                 len = strlen(lpfcinfobuf);
1032                 snprintf(lpfcinfobuf + len,
1033                         384-len,
1034                         " on PCI bus %02x device %02x irq %d",
1035                         phba->pcidev->bus->number,
1036                         phba->pcidev->devfn,
1037                         phba->pcidev->irq);
1038                 len = strlen(lpfcinfobuf);
1039                 if (phba->Port[0]) {
1040                         snprintf(lpfcinfobuf + len,
1041                                  384-len,
1042                                  " port %s",
1043                                  phba->Port);
1044                 }
1045         }
1046         return lpfcinfobuf;
1047 }
1048
1049 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
1050 {
1051         unsigned long  poll_tmo_expires =
1052                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
1053
1054         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
1055                 mod_timer(&phba->fcp_poll_timer,
1056                           poll_tmo_expires);
1057 }
1058
1059 void lpfc_poll_start_timer(struct lpfc_hba * phba)
1060 {
1061         lpfc_poll_rearm_timer(phba);
1062 }
1063
1064 void lpfc_poll_timeout(unsigned long ptr)
1065 {
1066         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
1067
1068         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1069                 lpfc_sli_poll_fcp_ring (phba);
1070                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1071                         lpfc_poll_rearm_timer(phba);
1072         }
1073 }
1074
1075 static int
1076 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1077 {
1078         struct Scsi_Host  *shost = cmnd->device->host;
1079         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1080         struct lpfc_hba   *phba = vport->phba;
1081         struct lpfc_sli   *psli = &phba->sli;
1082         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1083         struct lpfc_nodelist *ndlp = rdata->pnode;
1084         struct lpfc_scsi_buf *lpfc_cmd;
1085         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1086         int err;
1087
1088         err = fc_remote_port_chkready(rport);
1089         if (err) {
1090                 cmnd->result = err;
1091                 goto out_fail_command;
1092         }
1093
1094         /*
1095          * Catch race where our node has transitioned, but the
1096          * transport is still transitioning.
1097          */
1098         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1099                 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
1100                 goto out_fail_command;
1101         }
1102         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
1103                 goto out_host_busy;
1104
1105         lpfc_cmd = lpfc_get_scsi_buf(phba);
1106         if (lpfc_cmd == NULL) {
1107                 lpfc_adjust_queue_depth(phba);
1108
1109                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1110                                  "0707 driver's buffer pool is empty, "
1111                                  "IO busied\n");
1112                 goto out_host_busy;
1113         }
1114
1115         /*
1116          * Store the midlayer's command structure for the completion phase
1117          * and complete the command initialization.
1118          */
1119         lpfc_cmd->pCmd  = cmnd;
1120         lpfc_cmd->rdata = rdata;
1121         lpfc_cmd->timeout = 0;
1122         lpfc_cmd->start_time = jiffies;
1123         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
1124         cmnd->scsi_done = done;
1125
1126         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
1127         if (err)
1128                 goto out_host_busy_free_buf;
1129
1130         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
1131
1132         atomic_inc(&ndlp->cmd_pending);
1133         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
1134                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
1135         if (err)
1136                 goto out_host_busy_free_buf;
1137
1138         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1139                 lpfc_sli_poll_fcp_ring(phba);
1140                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1141                         lpfc_poll_rearm_timer(phba);
1142         }
1143
1144         return 0;
1145
1146  out_host_busy_free_buf:
1147         atomic_dec(&ndlp->cmd_pending);
1148         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1149         lpfc_release_scsi_buf(phba, lpfc_cmd);
1150  out_host_busy:
1151         return SCSI_MLQUEUE_HOST_BUSY;
1152
1153  out_fail_command:
1154         done(cmnd);
1155         return 0;
1156 }
1157
1158 static void
1159 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1160 {
1161         struct Scsi_Host *shost = cmnd->device->host;
1162         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1163
1164         spin_lock_irq(shost->host_lock);
1165         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1166                 spin_unlock_irq(shost->host_lock);
1167                 msleep(1000);
1168                 spin_lock_irq(shost->host_lock);
1169         }
1170         spin_unlock_irq(shost->host_lock);
1171         return;
1172 }
1173
1174 static int
1175 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1176 {
1177         struct Scsi_Host  *shost = cmnd->device->host;
1178         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1179         struct lpfc_hba   *phba = vport->phba;
1180         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1181         struct lpfc_iocbq *iocb;
1182         struct lpfc_iocbq *abtsiocb;
1183         struct lpfc_scsi_buf *lpfc_cmd;
1184         IOCB_t *cmd, *icmd;
1185         int ret = SUCCESS;
1186         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1187
1188         lpfc_block_error_handler(cmnd);
1189         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1190         BUG_ON(!lpfc_cmd);
1191
1192         /*
1193          * If pCmd field of the corresponding lpfc_scsi_buf structure
1194          * points to a different SCSI command, then the driver has
1195          * already completed this command, but the midlayer did not
1196          * see the completion before the eh fired.  Just return
1197          * SUCCESS.
1198          */
1199         iocb = &lpfc_cmd->cur_iocbq;
1200         if (lpfc_cmd->pCmd != cmnd)
1201                 goto out;
1202
1203         BUG_ON(iocb->context1 != lpfc_cmd);
1204
1205         abtsiocb = lpfc_sli_get_iocbq(phba);
1206         if (abtsiocb == NULL) {
1207                 ret = FAILED;
1208                 goto out;
1209         }
1210
1211         /*
1212          * The scsi command can not be in txq and it is in flight because the
1213          * pCmd is still pointig at the SCSI command we have to abort. There
1214          * is no need to search the txcmplq. Just send an abort to the FW.
1215          */
1216
1217         cmd = &iocb->iocb;
1218         icmd = &abtsiocb->iocb;
1219         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1220         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1221         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1222
1223         icmd->ulpLe = 1;
1224         icmd->ulpClass = cmd->ulpClass;
1225         if (lpfc_is_link_up(phba))
1226                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1227         else
1228                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1229
1230         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1231         abtsiocb->vport = vport;
1232         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1233                 lpfc_sli_release_iocbq(phba, abtsiocb);
1234                 ret = FAILED;
1235                 goto out;
1236         }
1237
1238         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1239                 lpfc_sli_poll_fcp_ring (phba);
1240
1241         lpfc_cmd->waitq = &waitq;
1242         /* Wait for abort to complete */
1243         wait_event_timeout(waitq,
1244                           (lpfc_cmd->pCmd != cmnd),
1245                            (2*vport->cfg_devloss_tmo*HZ));
1246
1247         spin_lock_irq(shost->host_lock);
1248         lpfc_cmd->waitq = NULL;
1249         spin_unlock_irq(shost->host_lock);
1250
1251         if (lpfc_cmd->pCmd == cmnd) {
1252                 ret = FAILED;
1253                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1254                                  "0748 abort handler timed out waiting "
1255                                  "for abort to complete: ret %#x, ID %d, "
1256                                  "LUN %d, snum %#lx\n",
1257                                  ret, cmnd->device->id, cmnd->device->lun,
1258                                  cmnd->serial_number);
1259         }
1260
1261  out:
1262         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1263                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1264                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1265                          cmnd->device->lun, cmnd->serial_number);
1266         return ret;
1267 }
1268
1269 static int
1270 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1271 {
1272         struct Scsi_Host  *shost = cmnd->device->host;
1273         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1274         struct lpfc_hba   *phba = vport->phba;
1275         struct lpfc_scsi_buf *lpfc_cmd;
1276         struct lpfc_iocbq *iocbq, *iocbqrsp;
1277         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1278         struct lpfc_nodelist *pnode = rdata->pnode;
1279         unsigned long later;
1280         int ret = SUCCESS;
1281         int status;
1282         int cnt;
1283
1284         lpfc_block_error_handler(cmnd);
1285         /*
1286          * If target is not in a MAPPED state, delay the reset until
1287          * target is rediscovered or devloss timeout expires.
1288          */
1289         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1290         while (time_after(later, jiffies)) {
1291                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1292                         return FAILED;
1293                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1294                         break;
1295                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1296                 rdata = cmnd->device->hostdata;
1297                 if (!rdata)
1298                         break;
1299                 pnode = rdata->pnode;
1300         }
1301         if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1302                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1303                                  "0721 LUN Reset rport "
1304                                  "failure: msec x%x rdata x%p\n",
1305                                  jiffies_to_msecs(jiffies - later), rdata);
1306                 return FAILED;
1307         }
1308         lpfc_cmd = lpfc_get_scsi_buf(phba);
1309         if (lpfc_cmd == NULL)
1310                 return FAILED;
1311         lpfc_cmd->timeout = 60;
1312         lpfc_cmd->rdata = rdata;
1313
1314         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
1315                                               cmnd->device->lun,
1316                                               FCP_TARGET_RESET);
1317         if (!status) {
1318                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1319                 return FAILED;
1320         }
1321         iocbq = &lpfc_cmd->cur_iocbq;
1322
1323         /* get a buffer for this IOCB command response */
1324         iocbqrsp = lpfc_sli_get_iocbq(phba);
1325         if (iocbqrsp == NULL) {
1326                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1327                 return FAILED;
1328         }
1329         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1330                          "0703 Issue target reset to TGT %d LUN %d "
1331                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1332                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1333         status = lpfc_sli_issue_iocb_wait(phba,
1334                                           &phba->sli.ring[phba->sli.fcp_ring],
1335                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
1336         if (status == IOCB_TIMEDOUT) {
1337                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1338                 ret = TIMEOUT_ERROR;
1339         } else {
1340                 if (status != IOCB_SUCCESS)
1341                         ret = FAILED;
1342                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1343         }
1344         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1345                          "0713 SCSI layer issued device reset (%d, %d) "
1346                          "return x%x status x%x result x%x\n",
1347                          cmnd->device->id, cmnd->device->lun, ret,
1348                          iocbqrsp->iocb.ulpStatus,
1349                          iocbqrsp->iocb.un.ulpWord[4]);
1350         lpfc_sli_release_iocbq(phba, iocbqrsp);
1351         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1352                                 LPFC_CTX_TGT);
1353         if (cnt)
1354                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1355                                     cmnd->device->id, cmnd->device->lun,
1356                                     LPFC_CTX_TGT);
1357         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1358         while (time_after(later, jiffies) && cnt) {
1359                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1360                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1361                                         cmnd->device->lun, LPFC_CTX_TGT);
1362         }
1363         if (cnt) {
1364                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1365                                  "0719 device reset I/O flush failure: "
1366                                  "cnt x%x\n", cnt);
1367                 ret = FAILED;
1368         }
1369         return ret;
1370 }
1371
1372 static int
1373 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1374 {
1375         struct Scsi_Host  *shost = cmnd->device->host;
1376         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1377         struct lpfc_hba   *phba = vport->phba;
1378         struct lpfc_nodelist *ndlp = NULL;
1379         int match;
1380         int ret = SUCCESS, status = SUCCESS, i;
1381         int cnt;
1382         struct lpfc_scsi_buf * lpfc_cmd;
1383         unsigned long later;
1384
1385         lpfc_block_error_handler(cmnd);
1386         /*
1387          * Since the driver manages a single bus device, reset all
1388          * targets known to the driver.  Should any target reset
1389          * fail, this routine returns failure to the midlayer.
1390          */
1391         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1392                 /* Search for mapped node by target ID */
1393                 match = 0;
1394                 spin_lock_irq(shost->host_lock);
1395                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1396                         if (!NLP_CHK_NODE_ACT(ndlp))
1397                                 continue;
1398                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1399                             ndlp->nlp_sid == i &&
1400                             ndlp->rport) {
1401                                 match = 1;
1402                                 break;
1403                         }
1404                 }
1405                 spin_unlock_irq(shost->host_lock);
1406                 if (!match)
1407                         continue;
1408                 lpfc_cmd = lpfc_get_scsi_buf(phba);
1409                 if (lpfc_cmd) {
1410                         lpfc_cmd->timeout = 60;
1411                         status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1412                                                      cmnd->device->lun,
1413                                                      ndlp->rport->dd_data);
1414                         if (status != TIMEOUT_ERROR)
1415                                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1416                 }
1417                 if (!lpfc_cmd || status != SUCCESS) {
1418                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1419                                          "0700 Bus Reset on target %d failed\n",
1420                                          i);
1421                         ret = FAILED;
1422                 }
1423         }
1424         /*
1425          * All outstanding txcmplq I/Os should have been aborted by
1426          * the targets.  Unfortunately, some targets do not abide by
1427          * this forcing the driver to double check.
1428          */
1429         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1430         if (cnt)
1431                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1432                                     0, 0, LPFC_CTX_HOST);
1433         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1434         while (time_after(later, jiffies) && cnt) {
1435                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1436                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1437         }
1438         if (cnt) {
1439                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1440                                  "0715 Bus Reset I/O flush failure: "
1441                                  "cnt x%x left x%x\n", cnt, i);
1442                 ret = FAILED;
1443         }
1444         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1445                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1446         return ret;
1447 }
1448
1449 static int
1450 lpfc_slave_alloc(struct scsi_device *sdev)
1451 {
1452         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1453         struct lpfc_hba   *phba = vport->phba;
1454         struct lpfc_scsi_buf *scsi_buf = NULL;
1455         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1456         uint32_t total = 0, i;
1457         uint32_t num_to_alloc = 0;
1458         unsigned long flags;
1459
1460         if (!rport || fc_remote_port_chkready(rport))
1461                 return -ENXIO;
1462
1463         sdev->hostdata = rport->dd_data;
1464
1465         /*
1466          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1467          * available list of scsi buffers.  Don't allocate more than the
1468          * HBA limit conveyed to the midlayer via the host structure.  The
1469          * formula accounts for the lun_queue_depth + error handlers + 1
1470          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1471          */
1472         total = phba->total_scsi_bufs;
1473         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1474
1475         /* Allow some exchanges to be available always to complete discovery */
1476         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1477                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1478                                  "0704 At limitation of %d preallocated "
1479                                  "command buffers\n", total);
1480                 return 0;
1481         /* Allow some exchanges to be available always to complete discovery */
1482         } else if (total + num_to_alloc >
1483                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1484                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1485                                  "0705 Allocation request of %d "
1486                                  "command buffers will exceed max of %d.  "
1487                                  "Reducing allocation request to %d.\n",
1488                                  num_to_alloc, phba->cfg_hba_queue_depth,
1489                                  (phba->cfg_hba_queue_depth - total));
1490                 num_to_alloc = phba->cfg_hba_queue_depth - total;
1491         }
1492
1493         for (i = 0; i < num_to_alloc; i++) {
1494                 scsi_buf = lpfc_new_scsi_buf(vport);
1495                 if (!scsi_buf) {
1496                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1497                                          "0706 Failed to allocate "
1498                                          "command buffer\n");
1499                         break;
1500                 }
1501
1502                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1503                 phba->total_scsi_bufs++;
1504                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1505                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1506         }
1507         return 0;
1508 }
1509
1510 static int
1511 lpfc_slave_configure(struct scsi_device *sdev)
1512 {
1513         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1514         struct lpfc_hba   *phba = vport->phba;
1515         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
1516
1517         if (sdev->tagged_supported)
1518                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
1519         else
1520                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
1521
1522         /*
1523          * Initialize the fc transport attributes for the target
1524          * containing this scsi device.  Also note that the driver's
1525          * target pointer is stored in the starget_data for the
1526          * driver's sysfs entry point functions.
1527          */
1528         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
1529
1530         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1531                 lpfc_sli_poll_fcp_ring(phba);
1532                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1533                         lpfc_poll_rearm_timer(phba);
1534         }
1535
1536         return 0;
1537 }
1538
1539 static void
1540 lpfc_slave_destroy(struct scsi_device *sdev)
1541 {
1542         sdev->hostdata = NULL;
1543         return;
1544 }
1545
1546
1547 struct scsi_host_template lpfc_template = {
1548         .module                 = THIS_MODULE,
1549         .name                   = LPFC_DRIVER_NAME,
1550         .info                   = lpfc_info,
1551         .queuecommand           = lpfc_queuecommand,
1552         .eh_abort_handler       = lpfc_abort_handler,
1553         .eh_device_reset_handler= lpfc_device_reset_handler,
1554         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1555         .slave_alloc            = lpfc_slave_alloc,
1556         .slave_configure        = lpfc_slave_configure,
1557         .slave_destroy          = lpfc_slave_destroy,
1558         .scan_finished          = lpfc_scan_finished,
1559         .this_id                = -1,
1560         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1561         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1562         .use_clustering         = ENABLE_CLUSTERING,
1563         .shost_attrs            = lpfc_hba_attrs,
1564         .max_sectors            = 0xFFFF,
1565 };
1566
1567 struct scsi_host_template lpfc_vport_template = {
1568         .module                 = THIS_MODULE,
1569         .name                   = LPFC_DRIVER_NAME,
1570         .info                   = lpfc_info,
1571         .queuecommand           = lpfc_queuecommand,
1572         .eh_abort_handler       = lpfc_abort_handler,
1573         .eh_device_reset_handler= lpfc_device_reset_handler,
1574         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
1575         .slave_alloc            = lpfc_slave_alloc,
1576         .slave_configure        = lpfc_slave_configure,
1577         .slave_destroy          = lpfc_slave_destroy,
1578         .scan_finished          = lpfc_scan_finished,
1579         .this_id                = -1,
1580         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
1581         .cmd_per_lun            = LPFC_CMD_PER_LUN,
1582         .use_clustering         = ENABLE_CLUSTERING,
1583         .shost_attrs            = lpfc_vport_attrs,
1584         .max_sectors            = 0xFFFF,
1585 };