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_nl.h"
  36 #include "lpfc_disc.h"
  37 #include "lpfc_scsi.h"
  38 #include "lpfc.h"
  39 #include "lpfc_logmsg.h"
  40 #include "lpfc_crtn.h"
  41 #include "lpfc_vport.h"
  42
  43 #define LPFC_RESET_WAIT  2
  44 #define LPFC_ABORT_WAIT  2
  45
  46 /**
  47  * lpfc_update_stats: Update statistical data for the command completion.
  48  * @phba: Pointer to HBA object.
  49  * @lpfc_cmd: lpfc scsi command object pointer.
  50  *
  51  * This function is called when there is a command completion and this
  52  * function updates the statistical data for the command completion.
  53  **/
  54 static void
  55 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
  56 {
  57         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
  58         struct lpfc_nodelist *pnode = rdata->pnode;
  59         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
  60         unsigned long flags;
  61         struct Scsi_Host  *shost = cmd->device->host;
  62         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
  63         unsigned long latency;
  64         int i;
  65
  66         if (cmd->result)
  67                 return;
  68
  69         spin_lock_irqsave(shost->host_lock, flags);
  70         if (!vport->stat_data_enabled ||
  71                 vport->stat_data_blocked ||
  72                 !pnode->lat_data ||
  73                 (phba->bucket_type == LPFC_NO_BUCKET)) {
  74                 spin_unlock_irqrestore(shost->host_lock, flags);
  75                 return;
  76         }
  77         latency = jiffies_to_msecs(jiffies - lpfc_cmd->start_time);
  78
  79         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
  80                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
  81                         phba->bucket_step;
  82                 if (i >= LPFC_MAX_BUCKET_COUNT)
  83                         i = LPFC_MAX_BUCKET_COUNT;
  84         } else {
  85                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
  86                         if (latency <= (phba->bucket_base +
  87                                 ((1<<i)*phba->bucket_step)))
  88                                 break;
  89         }
  90
  91         pnode->lat_data[i].cmd_count++;
  92         spin_unlock_irqrestore(shost->host_lock, flags);
  93 }
  94
  95 /**
  96  * lpfc_send_sdev_queuedepth_change_event: Posts a queuedepth change
  97  *                   event.
  98  * @phba: Pointer to HBA context object.
  99  * @vport: Pointer to vport object.
 100  * @ndlp: Pointer to FC node associated with the target.
 101  * @lun: Lun number of the scsi device.
 102  * @old_val: Old value of the queue depth.
 103  * @new_val: New value of the queue depth.
 104  *
 105  * This function sends an event to the mgmt application indicating
 106  * there is a change in the scsi device queue depth.
 107  **/
 108 static void
 109 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 110                 struct lpfc_vport  *vport,
 111                 struct lpfc_nodelist *ndlp,
 112                 uint32_t lun,
 113                 uint32_t old_val,
 114                 uint32_t new_val)
 115 {
 116         struct lpfc_fast_path_event *fast_path_evt;
 117         unsigned long flags;
 118
 119         fast_path_evt = lpfc_alloc_fast_evt(phba);
 120         if (!fast_path_evt)
 121                 return;
 122
 123         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 124                 FC_REG_SCSI_EVENT;
 125         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 126                 LPFC_EVENT_VARQUEDEPTH;
 127
 128         /* Report all luns with change in queue depth */
 129         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 130         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 131                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 132                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 133                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 134                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 135         }
 136
 137         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 138         fast_path_evt->un.queue_depth_evt.newval = new_val;
 139         fast_path_evt->vport = vport;
 140
 141         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 142         spin_lock_irqsave(&phba->hbalock, flags);
 143         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 144         spin_unlock_irqrestore(&phba->hbalock, flags);
 145         lpfc_worker_wake_up(phba);
 146
 147         return;
 148 }
 149
 150 /**
 151  * lpfc_adjust_queue_depth: Post RAMP_DOWN_QUEUE event for worker thread.
 152  * @phba: The Hba for which this call is being executed.
 153  *
 154  * This routine is called when there is resource error in driver or firmware.
 155  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 156  * posts at most 1 event each second. This routine wakes up worker thread of
 157  * @phba to process WORKER_RAM_DOWN_EVENT event.
 158  *
 159  * This routine should be called with no lock held.
 160  **/
 161 void
 162 lpfc_adjust_queue_depth(struct lpfc_hba *phba)
 163 {
 164         unsigned long flags;
 165         uint32_t evt_posted;
 166
 167         spin_lock_irqsave(&phba->hbalock, flags);
 168         atomic_inc(&phba->num_rsrc_err);
 169         phba->last_rsrc_error_time = jiffies;
 170
 171         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 172                 spin_unlock_irqrestore(&phba->hbalock, flags);
 173                 return;
 174         }
 175
 176         phba->last_ramp_down_time = jiffies;
 177
 178         spin_unlock_irqrestore(&phba->hbalock, flags);
 179
 180         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 181         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 182         if (!evt_posted)
 183                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 184         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 185
 186         if (!evt_posted)
 187                 lpfc_worker_wake_up(phba);
 188         return;
 189 }
 190
 191 /**
 192  * lpfc_rampup_queue_depth: Post RAMP_UP_QUEUE event for worker thread.
 193  * @phba: The Hba for which this call is being executed.
 194  *
 195  * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 196  * post at most 1 event every 5 minute after last_ramp_up_time or
 197  * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 198  * to process WORKER_RAM_DOWN_EVENT event.
 199  *
 200  * This routine should be called with no lock held.
 201  **/
 202 static inline void
 203 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 204                         struct scsi_device *sdev)
 205 {
 206         unsigned long flags;
 207         struct lpfc_hba *phba = vport->phba;
 208         uint32_t evt_posted;
 209         atomic_inc(&phba->num_cmd_success);
 210
 211         if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
 212                 return;
 213         spin_lock_irqsave(&phba->hbalock, flags);
 214         if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
 215          ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
 216                 spin_unlock_irqrestore(&phba->hbalock, flags);
 217                 return;
 218         }
 219         phba->last_ramp_up_time = jiffies;
 220         spin_unlock_irqrestore(&phba->hbalock, flags);
 221
 222         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 223         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 224         if (!evt_posted)
 225                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 226         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 227
 228         if (!evt_posted)
 229                 lpfc_worker_wake_up(phba);
 230         return;
 231 }
 232
 233 /**
 234  * lpfc_ramp_down_queue_handler: WORKER_RAMP_DOWN_QUEUE event handler.
 235  * @phba: The Hba for which this call is being executed.
 236  *
 237  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 238  * thread.This routine reduces queue depth for all scsi device on each vport
 239  * associated with @phba.
 240  **/
 241 void
 242 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 243 {
 244         struct lpfc_vport **vports;
 245         struct Scsi_Host  *shost;
 246         struct scsi_device *sdev;
 247         unsigned long new_queue_depth, old_queue_depth;
 248         unsigned long num_rsrc_err, num_cmd_success;
 249         int i;
 250         struct lpfc_rport_data *rdata;
 251
 252         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 253         num_cmd_success = atomic_read(&phba->num_cmd_success);
 254
 255         vports = lpfc_create_vport_work_array(phba);
 256         if (vports != NULL)
 257                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 258                         shost = lpfc_shost_from_vport(vports[i]);
 259                         shost_for_each_device(sdev, shost) {
 260                                 new_queue_depth =
 261                                         sdev->queue_depth * num_rsrc_err /
 262                                         (num_rsrc_err + num_cmd_success);
 263                                 if (!new_queue_depth)
 264                                         new_queue_depth = sdev->queue_depth - 1;
 265                                 else
 266                                         new_queue_depth = sdev->queue_depth -
 267                                                                 new_queue_depth;
 268                                 old_queue_depth = sdev->queue_depth;
 269                                 if (sdev->ordered_tags)
 270                                         scsi_adjust_queue_depth(sdev,
 271                                                         MSG_ORDERED_TAG,
 272                                                         new_queue_depth);
 273                                 else
 274                                         scsi_adjust_queue_depth(sdev,
 275                                                         MSG_SIMPLE_TAG,
 276                                                         new_queue_depth);
 277                                 rdata = sdev->hostdata;
 278                                 if (rdata)
 279                                         lpfc_send_sdev_queuedepth_change_event(
 280                                                 phba, vports[i],
 281                                                 rdata->pnode,
 282                                                 sdev->lun, old_queue_depth,
 283                                                 new_queue_depth);
 284                         }
 285                 }
 286         lpfc_destroy_vport_work_array(phba, vports);
 287         atomic_set(&phba->num_rsrc_err, 0);
 288         atomic_set(&phba->num_cmd_success, 0);
 289 }
 290
 291 /**
 292  * lpfc_ramp_up_queue_handler: WORKER_RAMP_UP_QUEUE event handler.
 293  * @phba: The Hba for which this call is being executed.
 294  *
 295  * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 296  * thread.This routine increases queue depth for all scsi device on each vport
 297  * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 298  * num_cmd_success to zero.
 299  **/
 300 void
 301 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 302 {
 303         struct lpfc_vport **vports;
 304         struct Scsi_Host  *shost;
 305         struct scsi_device *sdev;
 306         int i;
 307         struct lpfc_rport_data *rdata;
 308
 309         vports = lpfc_create_vport_work_array(phba);
 310         if (vports != NULL)
 311                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 312                         shost = lpfc_shost_from_vport(vports[i]);
 313                         shost_for_each_device(sdev, shost) {
 314                                 if (vports[i]->cfg_lun_queue_depth <=
 315                                     sdev->queue_depth)
 316                                         continue;
 317                                 if (sdev->ordered_tags)
 318                                         scsi_adjust_queue_depth(sdev,
 319                                                         MSG_ORDERED_TAG,
 320                                                         sdev->queue_depth+1);
 321                                 else
 322                                         scsi_adjust_queue_depth(sdev,
 323                                                         MSG_SIMPLE_TAG,
 324                                                         sdev->queue_depth+1);
 325                                 rdata = sdev->hostdata;
 326                                 if (rdata)
 327                                         lpfc_send_sdev_queuedepth_change_event(
 328                                                 phba, vports[i],
 329                                                 rdata->pnode,
 330                                                 sdev->lun,
 331                                                 sdev->queue_depth - 1,
 332                                                 sdev->queue_depth);
 333                         }
 334                 }
 335         lpfc_destroy_vport_work_array(phba, vports);
 336         atomic_set(&phba->num_rsrc_err, 0);
 337         atomic_set(&phba->num_cmd_success, 0);
 338 }
 339
 340 /**
 341  * lpfc_scsi_dev_block: set all scsi hosts to block state.
 342  * @phba: Pointer to HBA context object.
 343  *
 344  * This function walks vport list and set each SCSI host to block state
 345  * by invoking fc_remote_port_delete() routine. This function is invoked
 346  * with EEH when device's PCI slot has been permanently disabled.
 347  **/
 348 void
 349 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 350 {
 351         struct lpfc_vport **vports;
 352         struct Scsi_Host  *shost;
 353         struct scsi_device *sdev;
 354         struct fc_rport *rport;
 355         int i;
 356
 357         vports = lpfc_create_vport_work_array(phba);
 358         if (vports != NULL)
 359                 for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 360                         shost = lpfc_shost_from_vport(vports[i]);
 361                         shost_for_each_device(sdev, shost) {
 362                                 rport = starget_to_rport(scsi_target(sdev));
 363                                 fc_remote_port_delete(rport);
 364                         }
 365                 }
 366         lpfc_destroy_vport_work_array(phba, vports);
 367 }
 368
 369 /**
 370  * lpfc_new_scsi_buf: Scsi buffer allocator.
 371  * @vport: The virtual port for which this call being executed.
 372  *
 373  * This routine allocates a scsi buffer, which contains all the necessary
 374  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
 375  * contains information to build the IOCB.  The DMAable region contains
 376  * memory for the FCP CMND, FCP RSP, and the initial BPL.  In addition to
 377  * allocating memory, the FCP CMND and FCP RSP BDEs are setup in the BPL
 378  * and the BPL BDE is setup in the IOCB.
 379  *
 380  * Return codes:
 381  *   NULL - Error
 382  *   Pointer to lpfc_scsi_buf data structure - Success
 383  **/
 384 static struct lpfc_scsi_buf *
 385 lpfc_new_scsi_buf(struct lpfc_vport *vport)
 386 {
 387         struct lpfc_hba *phba = vport->phba;
 388         struct lpfc_scsi_buf *psb;
 389         struct ulp_bde64 *bpl;
 390         IOCB_t *iocb;
 391         dma_addr_t pdma_phys_fcp_cmd;
 392         dma_addr_t pdma_phys_fcp_rsp;
 393         dma_addr_t pdma_phys_bpl;
 394         uint16_t iotag;
 395
 396         psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 397         if (!psb)
 398                 return NULL;
 399
 400         /*
 401          * Get memory from the pci pool to map the virt space to pci bus space
 402          * for an I/O.  The DMA buffer includes space for the struct fcp_cmnd,
 403          * struct fcp_rsp and the number of bde's necessary to support the
 404          * sg_tablesize.
 405          */
 406         psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
 407                                                         &psb->dma_handle);
 408         if (!psb->data) {
 409                 kfree(psb);
 410                 return NULL;
 411         }
 412
 413         /* Initialize virtual ptrs to dma_buf region. */
 414         memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 415
 416         /* Allocate iotag for psb->cur_iocbq. */
 417         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 418         if (iotag == 0) {
 419                 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 420                               psb->data, psb->dma_handle);
 421                 kfree (psb);
 422                 return NULL;
 423         }
 424         psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 425
 426         psb->fcp_cmnd = psb->data;
 427         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 428         psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 429                                                         sizeof(struct fcp_rsp);
 430
 431         /* Initialize local short-hand pointers. */
 432         bpl = psb->fcp_bpl;
 433         pdma_phys_fcp_cmd = psb->dma_handle;
 434         pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 435         pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 436                         sizeof(struct fcp_rsp);
 437
 438         /*
 439          * The first two bdes are the FCP_CMD and FCP_RSP.  The balance are sg
 440          * list bdes.  Initialize the first two and leave the rest for
 441          * queuecommand.
 442          */
 443         bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 444         bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 445         bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 446         bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 447         bpl[0].tus.w = le32_to_cpu(bpl->tus.w);
 448
 449         /* Setup the physical region for the FCP RSP */
 450         bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 451         bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 452         bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 453         bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 454         bpl[1].tus.w = le32_to_cpu(bpl->tus.w);
 455
 456         /*
 457          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
 458          * initialize it with all known data now.
 459          */
 460         iocb = &psb->cur_iocbq.iocb;
 461         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 462         if (phba->sli_rev == 3) {
 463                 /* fill in immediate fcp command BDE */
 464                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 465                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 466                 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 467                                                        unsli3.fcp_ext.icd);
 468                 iocb->un.fcpi64.bdl.addrHigh = 0;
 469                 iocb->ulpBdeCount = 0;
 470                 iocb->ulpLe = 0;
 471                 /* fill in responce BDE */
 472                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 473                 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 474                                                 sizeof(struct fcp_rsp);
 475                 iocb->unsli3.fcp_ext.rbde.addrLow =
 476                                                 putPaddrLow(pdma_phys_fcp_rsp);
 477                 iocb->unsli3.fcp_ext.rbde.addrHigh =
 478                                                 putPaddrHigh(pdma_phys_fcp_rsp);
 479         } else {
 480                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 481                 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
 482                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_bpl);
 483                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_bpl);
 484                 iocb->ulpBdeCount = 1;
 485                 iocb->ulpLe = 1;
 486         }
 487         iocb->ulpClass = CLASS3;
 488
 489         return psb;
 490 }
 491
 492 /**
 493  * lpfc_get_scsi_buf: Get a scsi buffer from lpfc_scsi_buf_list list of Hba.
 494  * @phba: The Hba for which this call is being executed.
 495  *
 496  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 497  * and returns to caller.
 498  *
 499  * Return codes:
 500  *   NULL - Error
 501  *   Pointer to lpfc_scsi_buf - Success
 502  **/
 503 static struct lpfc_scsi_buf*
 504 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 505 {
 506         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 507         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 508         unsigned long iflag = 0;
 509
 510         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 511         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 512         if (lpfc_cmd) {
 513                 lpfc_cmd->seg_cnt = 0;
 514                 lpfc_cmd->nonsg_phys = 0;
 515         }
 516         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 517         return  lpfc_cmd;
 518 }
 519
 520 /**
 521  * lpfc_release_scsi_buf: Return a scsi buffer back to hba lpfc_scsi_buf_list list.
 522  * @phba: The Hba for which this call is being executed.
 523  * @psb: The scsi buffer which is being released.
 524  *
 525  * This routine releases @psb scsi buffer by adding it to tail of @phba
 526  * lpfc_scsi_buf_list list.
 527  **/
 528 static void
 529 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 530 {
 531         unsigned long iflag = 0;
 532
 533         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 534         psb->pCmd = NULL;
 535         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 536         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 537 }
 538
 539 /**
 540  * lpfc_scsi_prep_dma_buf: Routine to do DMA mapping for scsi buffer.
 541  * @phba: The Hba for which this call is being executed.
 542  * @lpfc_cmd: The scsi buffer which is going to be mapped.
 543  *
 544  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
 545  * field of @lpfc_cmd. This routine scans through sg elements and format the
 546  * bdea. This routine also initializes all IOCB fields which are dependent on
 547  * scsi command request buffer.
 548  *
 549  * Return codes:
 550  *   1 - Error
 551  *   0 - Success
 552  **/
 553 static int
 554 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 555 {
 556         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 557         struct scatterlist *sgel = NULL;
 558         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 559         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
 560         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 561         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
 562         dma_addr_t physaddr;
 563         uint32_t num_bde = 0;
 564         int nseg, datadir = scsi_cmnd->sc_data_direction;
 565
 566         /*
 567          * There are three possibilities here - use scatter-gather segment, use
 568          * the single mapping, or neither.  Start the lpfc command prep by
 569          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 570          * data bde entry.
 571          */
 572         bpl += 2;
 573         if (scsi_sg_count(scsi_cmnd)) {
 574                 /*
 575                  * The driver stores the segment count returned from pci_map_sg
 576                  * because this a count of dma-mappings used to map the use_sg
 577                  * pages.  They are not guaranteed to be the same for those
 578                  * architectures that implement an IOMMU.
 579                  */
 580
 581                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 582                                   scsi_sg_count(scsi_cmnd), datadir);
 583                 if (unlikely(!nseg))
 584                         return 1;
 585
 586                 lpfc_cmd->seg_cnt = nseg;
 587                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 588                         printk(KERN_ERR "%s: Too many sg segments from "
 589                                "dma_map_sg.  Config %d, seg_cnt %d",
 590                                __func__, phba->cfg_sg_seg_cnt,
 591                                lpfc_cmd->seg_cnt);
 592                         scsi_dma_unmap(scsi_cmnd);
 593                         return 1;
 594                 }
 595
 596                 /*
 597                  * The driver established a maximum scatter-gather segment count
 598                  * during probe that limits the number of sg elements in any
 599                  * single scsi command.  Just run through the seg_cnt and format
 600                  * the bde's.
 601                  * When using SLI-3 the driver will try to fit all the BDEs into
 602                  * the IOCB. If it can't then the BDEs get added to a BPL as it
 603                  * does for SLI-2 mode.
 604                  */
 605                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
 606                         physaddr = sg_dma_address(sgel);
 607                         if (phba->sli_rev == 3 &&
 608                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
 609                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 610                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
 611                                 data_bde->addrLow = putPaddrLow(physaddr);
 612                                 data_bde->addrHigh = putPaddrHigh(physaddr);
 613                                 data_bde++;
 614                         } else {
 615                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 616                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
 617                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 618                                 bpl->addrLow =
 619                                         le32_to_cpu(putPaddrLow(physaddr));
 620                                 bpl->addrHigh =
 621                                         le32_to_cpu(putPaddrHigh(physaddr));
 622                                 bpl++;
 623                         }
 624                 }
 625         }
 626
 627         /*
 628          * Finish initializing those IOCB fields that are dependent on the
 629          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
 630          * explicitly reinitialized and for SLI-3 the extended bde count is
 631          * explicitly reinitialized since all iocb memory resources are reused.
 632          */
 633         if (phba->sli_rev == 3) {
 634                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
 635                         /*
 636                          * The extended IOCB format can only fit 3 BDE or a BPL.
 637                          * This I/O has more than 3 BDE so the 1st data bde will
 638                          * be a BPL that is filled in here.
 639                          */
 640                         physaddr = lpfc_cmd->dma_handle;
 641                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
 642                         data_bde->tus.f.bdeSize = (num_bde *
 643                                                    sizeof(struct ulp_bde64));
 644                         physaddr += (sizeof(struct fcp_cmnd) +
 645                                      sizeof(struct fcp_rsp) +
 646                                      (2 * sizeof(struct ulp_bde64)));
 647                         data_bde->addrHigh = putPaddrHigh(physaddr);
 648                         data_bde->addrLow = putPaddrLow(physaddr);
 649                         /* ebde count includes the responce bde and data bpl */
 650                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
 651                 } else {
 652                         /* ebde count includes the responce bde and data bdes */
 653                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 654                 }
 655         } else {
 656                 iocb_cmd->un.fcpi64.bdl.bdeSize =
 657                         ((num_bde + 2) * sizeof(struct ulp_bde64));
 658         }
 659         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 660         return 0;
 661 }
 662
 663 /**
 664  * lpfc_send_scsi_error_event: Posts an event when there is SCSI error.
 665  * @phba: Pointer to hba context object.
 666  * @vport: Pointer to vport object.
 667  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
 668  * @rsp_iocb: Pointer to response iocb object which reported error.
 669  *
 670  * This function posts an event when there is a SCSI command reporting
 671  * error from the scsi device.
 672  **/
 673 static void
 674 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
 675                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
 676         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 677         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 678         uint32_t resp_info = fcprsp->rspStatus2;
 679         uint32_t scsi_status = fcprsp->rspStatus3;
 680         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 681         struct lpfc_fast_path_event *fast_path_evt = NULL;
 682         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
 683         unsigned long flags;
 684
 685         /* If there is queuefull or busy condition send a scsi event */
 686         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
 687                 (cmnd->result == SAM_STAT_BUSY)) {
 688                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 689                 if (!fast_path_evt)
 690                         return;
 691                 fast_path_evt->un.scsi_evt.event_type =
 692                         FC_REG_SCSI_EVENT;
 693                 fast_path_evt->un.scsi_evt.subcategory =
 694                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
 695                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
 696                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
 697                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
 698                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 699                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
 700                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 701         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
 702                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
 703                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 704                 if (!fast_path_evt)
 705                         return;
 706                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
 707                         FC_REG_SCSI_EVENT;
 708                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
 709                         LPFC_EVENT_CHECK_COND;
 710                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
 711                         cmnd->device->lun;
 712                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
 713                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 714                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
 715                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 716                 fast_path_evt->un.check_cond_evt.sense_key =
 717                         cmnd->sense_buffer[2] & 0xf;
 718                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
 719                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
 720         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 721                      fcpi_parm &&
 722                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
 723                         ((scsi_status == SAM_STAT_GOOD) &&
 724                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
 725                 /*
 726                  * If status is good or resid does not match with fcp_param and
 727                  * there is valid fcpi_parm, then there is a read_check error
 728                  */
 729                 fast_path_evt = lpfc_alloc_fast_evt(phba);
 730                 if (!fast_path_evt)
 731                         return;
 732                 fast_path_evt->un.read_check_error.header.event_type =
 733                         FC_REG_FABRIC_EVENT;
 734                 fast_path_evt->un.read_check_error.header.subcategory =
 735                         LPFC_EVENT_FCPRDCHKERR;
 736                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
 737                         &pnode->nlp_portname, sizeof(struct lpfc_name));
 738                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
 739                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
 740                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
 741                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
 742                 fast_path_evt->un.read_check_error.fcpiparam =
 743                         fcpi_parm;
 744         } else
 745                 return;
 746
 747         fast_path_evt->vport = vport;
 748         spin_lock_irqsave(&phba->hbalock, flags);
 749         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 750         spin_unlock_irqrestore(&phba->hbalock, flags);
 751         lpfc_worker_wake_up(phba);
 752         return;
 753 }
 754
 755 /**
 756  * lpfc_scsi_unprep_dma_buf: Routine to un-map DMA mapping of scatter gather.
 757  * @phba: The Hba for which this call is being executed.
 758  * @psb: The scsi buffer which is going to be un-mapped.
 759  *
 760  * This routine does DMA un-mapping of scatter gather list of scsi command
 761  * field of @lpfc_cmd.
 762  **/
 763 static void
 764 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 765 {
 766         /*
 767          * There are only two special cases to consider.  (1) the scsi command
 768          * requested scatter-gather usage or (2) the scsi command allocated
 769          * a request buffer, but did not request use_sg.  There is a third
 770          * case, but it does not require resource deallocation.
 771          */
 772         if (psb->seg_cnt > 0)
 773                 scsi_dma_unmap(psb->pCmd);
 774 }
 775
 776 /**
 777  * lpfc_handler_fcp_err: FCP response handler.
 778  * @vport: The virtual port for which this call is being executed.
 779  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 780  * @rsp_iocb: The response IOCB which contains FCP error.
 781  *
 782  * This routine is called to process response IOCB with status field
 783  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
 784  * based upon SCSI and FCP error.
 785  **/
 786 static void
 787 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
 788                     struct lpfc_iocbq *rsp_iocb)
 789 {
 790         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
 791         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
 792         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
 793         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
 794         uint32_t resp_info = fcprsp->rspStatus2;
 795         uint32_t scsi_status = fcprsp->rspStatus3;
 796         uint32_t *lp;
 797         uint32_t host_status = DID_OK;
 798         uint32_t rsplen = 0;
 799         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 800
 801
 802         /*
 803          *  If this is a task management command, there is no
 804          *  scsi packet associated with this lpfc_cmd.  The driver
 805          *  consumes it.
 806          */
 807         if (fcpcmd->fcpCntl2) {
 808                 scsi_status = 0;
 809                 goto out;
 810         }
 811
 812         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
 813                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
 814                 if (snslen > SCSI_SENSE_BUFFERSIZE)
 815                         snslen = SCSI_SENSE_BUFFERSIZE;
 816
 817                 if (resp_info & RSP_LEN_VALID)
 818                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
 819                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
 820         }
 821         lp = (uint32_t *)cmnd->sense_buffer;
 822
 823         if (!scsi_status && (resp_info & RESID_UNDER))
 824                 logit = LOG_FCP;
 825
 826         lpfc_printf_vlog(vport, KERN_WARNING, logit,
 827                          "0730 FCP command x%x failed: x%x SNS x%x x%x "
 828                          "Data: x%x x%x x%x x%x x%x\n",
 829                          cmnd->cmnd[0], scsi_status,
 830                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
 831                          be32_to_cpu(fcprsp->rspResId),
 832                          be32_to_cpu(fcprsp->rspSnsLen),
 833                          be32_to_cpu(fcprsp->rspRspLen),
 834                          fcprsp->rspInfo3);
 835
 836         if (resp_info & RSP_LEN_VALID) {
 837                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
 838                 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
 839                     (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
 840                         host_status = DID_ERROR;
 841                         goto out;
 842                 }
 843         }
 844
 845         scsi_set_resid(cmnd, 0);
 846         if (resp_info & RESID_UNDER) {
 847                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 848
 849                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 850                                  "0716 FCP Read Underrun, expected %d, "
 851                                  "residual %d Data: x%x x%x x%x\n",
 852                                  be32_to_cpu(fcpcmd->fcpDl),
 853                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
 854                                  cmnd->underflow);
 855
 856                 /*
 857                  * If there is an under run check if under run reported by
 858                  * storage array is same as the under run reported by HBA.
 859                  * If this is not same, there is a dropped frame.
 860                  */
 861                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
 862                         fcpi_parm &&
 863                         (scsi_get_resid(cmnd) != fcpi_parm)) {
 864                         lpfc_printf_vlog(vport, KERN_WARNING,
 865                                          LOG_FCP | LOG_FCP_ERROR,
 866                                          "0735 FCP Read Check Error "
 867                                          "and Underrun Data: x%x x%x x%x x%x\n",
 868                                          be32_to_cpu(fcpcmd->fcpDl),
 869                                          scsi_get_resid(cmnd), fcpi_parm,
 870                                          cmnd->cmnd[0]);
 871                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 872                         host_status = DID_ERROR;
 873                 }
 874                 /*
 875                  * The cmnd->underflow is the minimum number of bytes that must
 876                  * be transfered for this command.  Provided a sense condition
 877                  * is not present, make sure the actual amount transferred is at
 878                  * least the underflow value or fail.
 879                  */
 880                 if (!(resp_info & SNS_LEN_VALID) &&
 881                     (scsi_status == SAM_STAT_GOOD) &&
 882                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
 883                      < cmnd->underflow)) {
 884                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 885                                          "0717 FCP command x%x residual "
 886                                          "underrun converted to error "
 887                                          "Data: x%x x%x x%x\n",
 888                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
 889                                          scsi_get_resid(cmnd), cmnd->underflow);
 890                         host_status = DID_ERROR;
 891                 }
 892         } else if (resp_info & RESID_OVER) {
 893                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 894                                  "0720 FCP command x%x residual overrun error. "
 895                                  "Data: x%x x%x \n", cmnd->cmnd[0],
 896                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
 897                 host_status = DID_ERROR;
 898
 899         /*
 900          * Check SLI validation that all the transfer was actually done
 901          * (fcpi_parm should be zero). Apply check only to reads.
 902          */
 903         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
 904                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
 905                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
 906                                  "0734 FCP Read Check Error Data: "
 907                                  "x%x x%x x%x x%x\n",
 908                                  be32_to_cpu(fcpcmd->fcpDl),
 909                                  be32_to_cpu(fcprsp->rspResId),
 910                                  fcpi_parm, cmnd->cmnd[0]);
 911                 host_status = DID_ERROR;
 912                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
 913         }
 914
 915  out:
 916         cmnd->result = ScsiResult(host_status, scsi_status);
 917         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
 918 }
 919
 920 /**
 921  * lpfc_scsi_cmd_iocb_cmpl: Scsi cmnd IOCB completion routine.
 922  * @phba: The Hba for which this call is being executed.
 923  * @pIocbIn: The command IOCBQ for the scsi cmnd.
 924  * @pIocbOut: The response IOCBQ for the scsi cmnd .
 925  *
 926  * This routine assigns scsi command result by looking into response IOCB
 927  * status field appropriately. This routine handles QUEUE FULL condition as
 928  * well by ramping down device queue depth.
 929  **/
 930 static void
 931 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 932                         struct lpfc_iocbq *pIocbOut)
 933 {
 934         struct lpfc_scsi_buf *lpfc_cmd =
 935                 (struct lpfc_scsi_buf *) pIocbIn->context1;
 936         struct lpfc_vport      *vport = pIocbIn->vport;
 937         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 938         struct lpfc_nodelist *pnode = rdata->pnode;
 939         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 940         int result;
 941         struct scsi_device *sdev, *tmp_sdev;
 942         int depth = 0;
 943         unsigned long flags;
 944         struct lpfc_fast_path_event *fast_path_evt;
 945
 946         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 947         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 948         atomic_dec(&pnode->cmd_pending);
 949
 950         if (lpfc_cmd->status) {
 951                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
 952                     (lpfc_cmd->result & IOERR_DRVR_MASK))
 953                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
 954                 else if (lpfc_cmd->status >= IOSTAT_CNT)
 955                         lpfc_cmd->status = IOSTAT_DEFAULT;
 956
 957                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 958                                  "0729 FCP cmd x%x failed <%d/%d> "
 959                                  "status: x%x result: x%x Data: x%x x%x\n",
 960                                  cmd->cmnd[0],
 961                                  cmd->device ? cmd->device->id : 0xffff,
 962                                  cmd->device ? cmd->device->lun : 0xffff,
 963                                  lpfc_cmd->status, lpfc_cmd->result,
 964                                  pIocbOut->iocb.ulpContext,
 965                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 966
 967                 switch (lpfc_cmd->status) {
 968                 case IOSTAT_FCP_RSP_ERROR:
 969                         /* Call FCP RSP handler to determine result */
 970                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
 971                         break;
 972                 case IOSTAT_NPORT_BSY:
 973                 case IOSTAT_FABRIC_BSY:
 974                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
 975                         fast_path_evt = lpfc_alloc_fast_evt(phba);
 976                         if (!fast_path_evt)
 977                                 break;
 978                         fast_path_evt->un.fabric_evt.event_type =
 979                                 FC_REG_FABRIC_EVENT;
 980                         fast_path_evt->un.fabric_evt.subcategory =
 981                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
 982                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
 983                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
 984                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
 985                                         &pnode->nlp_portname,
 986                                         sizeof(struct lpfc_name));
 987                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
 988                                         &pnode->nlp_nodename,
 989                                         sizeof(struct lpfc_name));
 990                         }
 991                         fast_path_evt->vport = vport;
 992                         fast_path_evt->work_evt.evt =
 993                                 LPFC_EVT_FASTPATH_MGMT_EVT;
 994                         spin_lock_irqsave(&phba->hbalock, flags);
 995                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
 996                                 &phba->work_list);
 997                         spin_unlock_irqrestore(&phba->hbalock, flags);
 998                         lpfc_worker_wake_up(phba);
 999                         break;
1000                 case IOSTAT_LOCAL_REJECT:
1001                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
1002                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
1003                             lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
1004                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
1005                                 break;
1006                         } /* else: fall through */
1007                 default:
1008                         cmd->result = ScsiResult(DID_ERROR, 0);
1009                         break;
1010                 }
1011
1012                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
1013                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
1014                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
1015                                                  SAM_STAT_BUSY);
1016         } else {
1017                 cmd->result = ScsiResult(DID_OK, 0);
1018         }
1019
1020         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
1021                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
1022
1023                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1024                                  "0710 Iodone <%d/%d> cmd %p, error "
1025                                  "x%x SNS x%x x%x Data: x%x x%x\n",
1026                                  cmd->device->id, cmd->device->lun, cmd,
1027                                  cmd->result, *lp, *(lp + 3), cmd->retries,
1028                                  scsi_get_resid(cmd));
1029         }
1030
1031         lpfc_update_stats(phba, lpfc_cmd);
1032         result = cmd->result;
1033         sdev = cmd->device;
1034         if (vport->cfg_max_scsicmpl_time &&
1035            time_after(jiffies, lpfc_cmd->start_time +
1036                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
1037                 spin_lock_irqsave(sdev->host->host_lock, flags);
1038                 if ((pnode->cmd_qdepth > atomic_read(&pnode->cmd_pending) &&
1039                     (atomic_read(&pnode->cmd_pending) > LPFC_MIN_TGT_QDEPTH) &&
1040                     ((cmd->cmnd[0] == READ_10) || (cmd->cmnd[0] == WRITE_10))))
1041                         pnode->cmd_qdepth = atomic_read(&pnode->cmd_pending);
1042
1043                 pnode->last_change_time = jiffies;
1044                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
1045         } else if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
1046                    time_after(jiffies, pnode->last_change_time +
1047                         msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
1048                 spin_lock_irqsave(sdev->host->host_lock, flags);
1049                 pnode->cmd_qdepth += pnode->cmd_qdepth *
1050                         LPFC_TGTQ_RAMPUP_PCENT / 100;
1051                 if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
1052                         pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
1053                 pnode->last_change_time = jiffies;
1054                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
1055         }
1056
1057         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1058         cmd->scsi_done(cmd);
1059
1060         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1061                 /*
1062                  * If there is a thread waiting for command completion
1063                  * wake up the thread.
1064                  */
1065                 spin_lock_irqsave(sdev->host->host_lock, flags);
1066                 lpfc_cmd->pCmd = NULL;
1067                 if (lpfc_cmd->waitq)
1068                         wake_up(lpfc_cmd->waitq);
1069                 spin_unlock_irqrestore(sdev->host->host_lock, flags);
1070                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1071                 return;
1072         }
1073
1074
1075         if (!result)
1076                 lpfc_rampup_queue_depth(vport, sdev);
1077
1078         if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
1079            ((jiffies - pnode->last_ramp_up_time) >
1080                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
1081            ((jiffies - pnode->last_q_full_time) >
1082                 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
1083            (vport->cfg_lun_queue_depth > sdev->queue_depth)) {
1084                 shost_for_each_device(tmp_sdev, sdev->host) {
1085                         if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
1086                                 if (tmp_sdev->id != sdev->id)
1087                                         continue;
1088                                 if (tmp_sdev->ordered_tags)
1089                                         scsi_adjust_queue_depth(tmp_sdev,
1090                                                 MSG_ORDERED_TAG,
1091                                                 tmp_sdev->queue_depth+1);
1092                                 else
1093                                         scsi_adjust_queue_depth(tmp_sdev,
1094                                                 MSG_SIMPLE_TAG,
1095                                                 tmp_sdev->queue_depth+1);
1096
1097                                 pnode->last_ramp_up_time = jiffies;
1098                         }
1099                 }
1100                 lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode,
1101                         0xFFFFFFFF,
1102                         sdev->queue_depth - 1, sdev->queue_depth);
1103         }
1104
1105         /*
1106          * Check for queue full.  If the lun is reporting queue full, then
1107          * back off the lun queue depth to prevent target overloads.
1108          */
1109         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
1110             NLP_CHK_NODE_ACT(pnode)) {
1111                 pnode->last_q_full_time = jiffies;
1112
1113                 shost_for_each_device(tmp_sdev, sdev->host) {
1114                         if (tmp_sdev->id != sdev->id)
1115                                 continue;
1116                         depth = scsi_track_queue_full(tmp_sdev,
1117                                         tmp_sdev->queue_depth - 1);
1118                 }
1119                 /*
1120                  * The queue depth cannot be lowered any more.
1121                  * Modify the returned error code to store
1122                  * the final depth value set by
1123                  * scsi_track_queue_full.
1124                  */
1125                 if (depth == -1)
1126                         depth = sdev->host->cmd_per_lun;
1127
1128                 if (depth) {
1129                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1130                                          "0711 detected queue full - lun queue "
1131                                          "depth adjusted to %d.\n", depth);
1132                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
1133                                 pnode, 0xFFFFFFFF,
1134                                 depth+1, depth);
1135                 }
1136         }
1137
1138         /*
1139          * If there is a thread waiting for command completion
1140          * wake up the thread.
1141          */
1142         spin_lock_irqsave(sdev->host->host_lock, flags);
1143         lpfc_cmd->pCmd = NULL;
1144         if (lpfc_cmd->waitq)
1145                 wake_up(lpfc_cmd->waitq);
1146         spin_unlock_irqrestore(sdev->host->host_lock, flags);
1147
1148         lpfc_release_scsi_buf(phba, lpfc_cmd);
1149 }
1150
1151 /**
1152  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB.
1153  * @data: A pointer to the immediate command data portion of the IOCB.
1154  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
1155  *
1156  * The routine copies the entire FCP command from @fcp_cmnd to @data while
1157  * byte swapping the data to big endian format for transmission on the wire.
1158  **/
1159 static void
1160 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
1161 {
1162         int i, j;
1163         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
1164              i += sizeof(uint32_t), j++) {
1165                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
1166         }
1167 }
1168
1169 /**
1170  * lpfc_scsi_prep_cmnd:  Routine to convert scsi cmnd to FCP information unit.
1171  * @vport: The virtual port for which this call is being executed.
1172  * @lpfc_cmd: The scsi command which needs to send.
1173  * @pnode: Pointer to lpfc_nodelist.
1174  *
1175  * This routine initializes fcp_cmnd and iocb data structure from scsi command
1176  * to transfer.
1177  **/
1178 static void
1179 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
1180                     struct lpfc_nodelist *pnode)
1181 {
1182         struct lpfc_hba *phba = vport->phba;
1183         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1184         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1185         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1186         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
1187         int datadir = scsi_cmnd->sc_data_direction;
1188         char tag[2];
1189
1190         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1191                 return;
1192
1193         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
1194         /* clear task management bits */
1195         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
1196
1197         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
1198                         &lpfc_cmd->fcp_cmnd->fcp_lun);
1199
1200         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
1201
1202         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
1203                 switch (tag[0]) {
1204                 case HEAD_OF_QUEUE_TAG:
1205                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
1206                         break;
1207                 case ORDERED_QUEUE_TAG:
1208                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
1209                         break;
1210                 default:
1211                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
1212                         break;
1213                 }
1214         } else
1215                 fcp_cmnd->fcpCntl1 = 0;
1216
1217         /*
1218          * There are three possibilities here - use scatter-gather segment, use
1219          * the single mapping, or neither.  Start the lpfc command prep by
1220          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1221          * data bde entry.
1222          */
1223         if (scsi_sg_count(scsi_cmnd)) {
1224                 if (datadir == DMA_TO_DEVICE) {
1225                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
1226                         iocb_cmd->un.fcpi.fcpi_parm = 0;
1227                         iocb_cmd->ulpPU = 0;
1228                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
1229                         phba->fc4OutputRequests++;
1230                 } else {
1231                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
1232                         iocb_cmd->ulpPU = PARM_READ_CHECK;
1233                         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1234                         fcp_cmnd->fcpCntl3 = READ_DATA;
1235                         phba->fc4InputRequests++;
1236                 }
1237         } else {
1238                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
1239                 iocb_cmd->un.fcpi.fcpi_parm = 0;
1240                 iocb_cmd->ulpPU = 0;
1241                 fcp_cmnd->fcpCntl3 = 0;
1242                 phba->fc4ControlRequests++;
1243         }
1244         if (phba->sli_rev == 3)
1245                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
1246         /*
1247          * Finish initializing those IOCB fields that are independent
1248          * of the scsi_cmnd request_buffer
1249          */
1250         piocbq->iocb.ulpContext = pnode->nlp_rpi;
1251         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
1252                 piocbq->iocb.ulpFCP2Rcvy = 1;
1253         else
1254                 piocbq->iocb.ulpFCP2Rcvy = 0;
1255
1256         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
1257         piocbq->context1  = lpfc_cmd;
1258         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
1259         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
1260         piocbq->vport = vport;
1261 }
1262
1263 /**
1264  * lpfc_scsi_prep_task_mgmt_cmnd: Convert scsi TM cmnd to FCP information unit.
1265  * @vport: The virtual port for which this call is being executed.
1266  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
1267  * @lun: Logical unit number.
1268  * @task_mgmt_cmd: SCSI task management command.
1269  *
1270  * This routine creates FCP information unit corresponding to @task_mgmt_cmd.
1271  *
1272  * Return codes:
1273  *   0 - Error
1274  *   1 - Success
1275  **/
1276 static int
1277 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
1278                              struct lpfc_scsi_buf *lpfc_cmd,
1279                              unsigned int lun,
1280                              uint8_t task_mgmt_cmd)
1281 {
1282         struct lpfc_iocbq *piocbq;
1283         IOCB_t *piocb;
1284         struct fcp_cmnd *fcp_cmnd;
1285         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
1286         struct lpfc_nodelist *ndlp = rdata->pnode;
1287
1288         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
1289             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
1290                 return 0;
1291
1292         piocbq = &(lpfc_cmd->cur_iocbq);
1293         piocbq->vport = vport;
1294
1295         piocb = &piocbq->iocb;
1296
1297         fcp_cmnd = lpfc_cmd->fcp_cmnd;
1298         /* Clear out any old data in the FCP command area */
1299         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1300         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
1301         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
1302         if (vport->phba->sli_rev == 3)
1303                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
1304         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
1305         piocb->ulpContext = ndlp->nlp_rpi;
1306         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
1307                 piocb->ulpFCP2Rcvy = 1;
1308         }
1309         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
1310
1311         /* ulpTimeout is only one byte */
1312         if (lpfc_cmd->timeout > 0xff) {
1313                 /*
1314                  * Do not timeout the command at the firmware level.
1315                  * The driver will provide the timeout mechanism.
1316                  */
1317                 piocb->ulpTimeout = 0;
1318         } else {
1319                 piocb->ulpTimeout = lpfc_cmd->timeout;
1320         }
1321
1322         return 1;
1323 }
1324
1325 /**
1326  * lpc_taskmgmt_def_cmpl: IOCB completion routine for task management command.
1327  * @phba: The Hba for which this call is being executed.
1328  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
1329  * @rspiocbq: Pointer to lpfc_iocbq data structure.
1330  *
1331  * This routine is IOCB completion routine for device reset and target reset
1332  * routine. This routine release scsi buffer associated with lpfc_cmd.
1333  **/
1334 static void
1335 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
1336                         struct lpfc_iocbq *cmdiocbq,
1337                         struct lpfc_iocbq *rspiocbq)
1338 {
1339         struct lpfc_scsi_buf *lpfc_cmd =
1340                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
1341         if (lpfc_cmd)
1342                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1343         return;
1344 }
1345
1346 /**
1347  * lpfc_scsi_tgt_reset: Target reset handler.
1348  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure
1349  * @vport: The virtual port for which this call is being executed.
1350  * @tgt_id: Target ID.
1351  * @lun: Lun number.
1352  * @rdata: Pointer to lpfc_rport_data.
1353  *
1354  * This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID.
1355  *
1356  * Return Code:
1357  *   0x2003 - Error
1358  *   0x2002 - Success.
1359  **/
1360 static int
1361 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
1362                     unsigned  tgt_id, unsigned int lun,
1363                     struct lpfc_rport_data *rdata)
1364 {
1365         struct lpfc_hba   *phba = vport->phba;
1366         struct lpfc_iocbq *iocbq;
1367         struct lpfc_iocbq *iocbqrsp;
1368         int ret;
1369         int status;
1370
1371         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
1372                 return FAILED;
1373
1374         lpfc_cmd->rdata = rdata;
1375         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
1376                                            FCP_TARGET_RESET);
1377         if (!status)
1378                 return FAILED;
1379
1380         iocbq = &lpfc_cmd->cur_iocbq;
1381         iocbqrsp = lpfc_sli_get_iocbq(phba);
1382
1383         if (!iocbqrsp)
1384                 return FAILED;
1385
1386         /* Issue Target Reset to TGT <num> */
1387         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1388                          "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
1389                          tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
1390         status = lpfc_sli_issue_iocb_wait(phba,
1391                                        &phba->sli.ring[phba->sli.fcp_ring],
1392                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
1393         if (status != IOCB_SUCCESS) {
1394                 if (status == IOCB_TIMEDOUT) {
1395                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1396                         ret = TIMEOUT_ERROR;
1397                 } else
1398                         ret = FAILED;
1399                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1400         } else {
1401                 ret = SUCCESS;
1402                 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
1403                 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
1404                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
1405                         (lpfc_cmd->result & IOERR_DRVR_MASK))
1406                                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
1407         }
1408
1409         lpfc_sli_release_iocbq(phba, iocbqrsp);
1410         return ret;
1411 }
1412
1413 /**
1414  * lpfc_info: Info entry point of scsi_host_template data structure.
1415  * @host: The scsi host for which this call is being executed.
1416  *
1417  * This routine provides module information about hba.
1418  *
1419  * Reutrn code:
1420  *   Pointer to char - Success.
1421  **/
1422 const char *
1423 lpfc_info(struct Scsi_Host *host)
1424 {
1425         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
1426         struct lpfc_hba   *phba = vport->phba;
1427         int len;
1428         static char  lpfcinfobuf[384];
1429
1430         memset(lpfcinfobuf,0,384);
1431         if (phba && phba->pcidev){
1432                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
1433                 len = strlen(lpfcinfobuf);
1434                 snprintf(lpfcinfobuf + len,
1435                         384-len,
1436                         " on PCI bus %02x device %02x irq %d",
1437                         phba->pcidev->bus->number,
1438                         phba->pcidev->devfn,
1439                         phba->pcidev->irq);
1440                 len = strlen(lpfcinfobuf);
1441                 if (phba->Port[0]) {
1442                         snprintf(lpfcinfobuf + len,
1443                                  384-len,
1444                                  " port %s",
1445                                  phba->Port);
1446                 }
1447         }
1448         return lpfcinfobuf;
1449 }
1450
1451 /**
1452  * lpfc_poll_rearm_time: Routine to modify fcp_poll timer of hba.
1453  * @phba: The Hba for which this call is being executed.
1454  *
1455  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
1456  * The default value of cfg_poll_tmo is 10 milliseconds.
1457  **/
1458 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
1459 {
1460         unsigned long  poll_tmo_expires =
1461                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
1462
1463         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
1464                 mod_timer(&phba->fcp_poll_timer,
1465                           poll_tmo_expires);
1466 }
1467
1468 /**
1469  * lpfc_poll_start_timer: Routine to start fcp_poll_timer of HBA.
1470  * @phba: The Hba for which this call is being executed.
1471  *
1472  * This routine starts the fcp_poll_timer of @phba.
1473  **/
1474 void lpfc_poll_start_timer(struct lpfc_hba * phba)
1475 {
1476         lpfc_poll_rearm_timer(phba);
1477 }
1478
1479 /**
1480  * lpfc_poll_timeout: Restart polling timer.
1481  * @ptr: Map to lpfc_hba data structure pointer.
1482  *
1483  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
1484  * and FCP Ring interrupt is disable.
1485  **/
1486
1487 void lpfc_poll_timeout(unsigned long ptr)
1488 {
1489         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
1490
1491         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1492                 lpfc_sli_poll_fcp_ring (phba);
1493                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1494                         lpfc_poll_rearm_timer(phba);
1495         }
1496 }
1497
1498 /**
1499  * lpfc_queuecommand: Queuecommand entry point of Scsi Host Templater data
1500  * structure.
1501  * @cmnd: Pointer to scsi_cmnd data structure.
1502  * @done: Pointer to done routine.
1503  *
1504  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
1505  * This routine prepares an IOCB from scsi command and provides to firmware.
1506  * The @done callback is invoked after driver finished processing the command.
1507  *
1508  * Return value :
1509  *   0 - Success
1510  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
1511  **/
1512 static int
1513 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1514 {
1515         struct Scsi_Host  *shost = cmnd->device->host;
1516         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1517         struct lpfc_hba   *phba = vport->phba;
1518         struct lpfc_sli   *psli = &phba->sli;
1519         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1520         struct lpfc_nodelist *ndlp = rdata->pnode;
1521         struct lpfc_scsi_buf *lpfc_cmd;
1522         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1523         int err;
1524
1525         err = fc_remote_port_chkready(rport);
1526         if (err) {
1527                 cmnd->result = err;
1528                 goto out_fail_command;
1529         }
1530
1531         /*
1532          * Catch race where our node has transitioned, but the
1533          * transport is still transitioning.
1534          */
1535         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1536                 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
1537                 goto out_fail_command;
1538         }
1539         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
1540                 goto out_host_busy;
1541
1542         lpfc_cmd = lpfc_get_scsi_buf(phba);
1543         if (lpfc_cmd == NULL) {
1544                 lpfc_adjust_queue_depth(phba);
1545
1546                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1547                                  "0707 driver's buffer pool is empty, "
1548                                  "IO busied\n");
1549                 goto out_host_busy;
1550         }
1551
1552         lpfc_cmd->start_time = jiffies;
1553         /*
1554          * Store the midlayer's command structure for the completion phase
1555          * and complete the command initialization.
1556          */
1557         lpfc_cmd->pCmd  = cmnd;
1558         lpfc_cmd->rdata = rdata;
1559         lpfc_cmd->timeout = 0;
1560         lpfc_cmd->start_time = jiffies;
1561         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
1562         cmnd->scsi_done = done;
1563
1564         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
1565         if (err)
1566                 goto out_host_busy_free_buf;
1567
1568         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
1569
1570         atomic_inc(&ndlp->cmd_pending);
1571         err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
1572                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
1573         if (err)
1574                 goto out_host_busy_free_buf;
1575
1576         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1577                 lpfc_sli_poll_fcp_ring(phba);
1578                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1579                         lpfc_poll_rearm_timer(phba);
1580         }
1581
1582         return 0;
1583
1584  out_host_busy_free_buf:
1585         atomic_dec(&ndlp->cmd_pending);
1586         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
1587         lpfc_release_scsi_buf(phba, lpfc_cmd);
1588  out_host_busy:
1589         return SCSI_MLQUEUE_HOST_BUSY;
1590
1591  out_fail_command:
1592         done(cmnd);
1593         return 0;
1594 }
1595
1596 /**
1597  * lpfc_block_error_handler: Routine to block error  handler.
1598  * @cmnd: Pointer to scsi_cmnd data structure.
1599  *
1600  *  This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD.
1601  **/
1602 static void
1603 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
1604 {
1605         struct Scsi_Host *shost = cmnd->device->host;
1606         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1607
1608         spin_lock_irq(shost->host_lock);
1609         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1610                 spin_unlock_irq(shost->host_lock);
1611                 msleep(1000);
1612                 spin_lock_irq(shost->host_lock);
1613         }
1614         spin_unlock_irq(shost->host_lock);
1615         return;
1616 }
1617
1618 /**
1619  * lpfc_abort_handler: Eh_abort_handler entry point of Scsi Host Template data
1620  *structure.
1621  * @cmnd: Pointer to scsi_cmnd data structure.
1622  *
1623  * This routine aborts @cmnd pending in base driver.
1624  *
1625  * Return code :
1626  *   0x2003 - Error
1627  *   0x2002 - Success
1628  **/
1629 static int
1630 lpfc_abort_handler(struct scsi_cmnd *cmnd)
1631 {
1632         struct Scsi_Host  *shost = cmnd->device->host;
1633         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1634         struct lpfc_hba   *phba = vport->phba;
1635         struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
1636         struct lpfc_iocbq *iocb;
1637         struct lpfc_iocbq *abtsiocb;
1638         struct lpfc_scsi_buf *lpfc_cmd;
1639         IOCB_t *cmd, *icmd;
1640         int ret = SUCCESS;
1641         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
1642
1643         lpfc_block_error_handler(cmnd);
1644         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
1645         BUG_ON(!lpfc_cmd);
1646
1647         /*
1648          * If pCmd field of the corresponding lpfc_scsi_buf structure
1649          * points to a different SCSI command, then the driver has
1650          * already completed this command, but the midlayer did not
1651          * see the completion before the eh fired.  Just return
1652          * SUCCESS.
1653          */
1654         iocb = &lpfc_cmd->cur_iocbq;
1655         if (lpfc_cmd->pCmd != cmnd)
1656                 goto out;
1657
1658         BUG_ON(iocb->context1 != lpfc_cmd);
1659
1660         abtsiocb = lpfc_sli_get_iocbq(phba);
1661         if (abtsiocb == NULL) {
1662                 ret = FAILED;
1663                 goto out;
1664         }
1665
1666         /*
1667          * The scsi command can not be in txq and it is in flight because the
1668          * pCmd is still pointig at the SCSI command we have to abort. There
1669          * is no need to search the txcmplq. Just send an abort to the FW.
1670          */
1671
1672         cmd = &iocb->iocb;
1673         icmd = &abtsiocb->iocb;
1674         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
1675         icmd->un.acxri.abortContextTag = cmd->ulpContext;
1676         icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
1677
1678         icmd->ulpLe = 1;
1679         icmd->ulpClass = cmd->ulpClass;
1680         if (lpfc_is_link_up(phba))
1681                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
1682         else
1683                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
1684
1685         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
1686         abtsiocb->vport = vport;
1687         if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
1688                 lpfc_sli_release_iocbq(phba, abtsiocb);
1689                 ret = FAILED;
1690                 goto out;
1691         }
1692
1693         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1694                 lpfc_sli_poll_fcp_ring (phba);
1695
1696         lpfc_cmd->waitq = &waitq;
1697         /* Wait for abort to complete */
1698         wait_event_timeout(waitq,
1699                           (lpfc_cmd->pCmd != cmnd),
1700                            (2*vport->cfg_devloss_tmo*HZ));
1701
1702         spin_lock_irq(shost->host_lock);
1703         lpfc_cmd->waitq = NULL;
1704         spin_unlock_irq(shost->host_lock);
1705
1706         if (lpfc_cmd->pCmd == cmnd) {
1707                 ret = FAILED;
1708                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1709                                  "0748 abort handler timed out waiting "
1710                                  "for abort to complete: ret %#x, ID %d, "
1711                                  "LUN %d, snum %#lx\n",
1712                                  ret, cmnd->device->id, cmnd->device->lun,
1713                                  cmnd->serial_number);
1714         }
1715
1716  out:
1717         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1718                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
1719                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
1720                          cmnd->device->lun, cmnd->serial_number);
1721         return ret;
1722 }
1723
1724 /**
1725  * lpfc_device_reset_handler: eh_device_reset entry point of Scsi Host Template
1726  *data structure.
1727  * @cmnd: Pointer to scsi_cmnd data structure.
1728  *
1729  * This routine does a device reset by sending a TARGET_RESET task management
1730  * command.
1731  *
1732  * Return code :
1733  *  0x2003 - Error
1734  *  0ex2002 - Success
1735  **/
1736 static int
1737 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
1738 {
1739         struct Scsi_Host  *shost = cmnd->device->host;
1740         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1741         struct lpfc_hba   *phba = vport->phba;
1742         struct lpfc_scsi_buf *lpfc_cmd;
1743         struct lpfc_iocbq *iocbq, *iocbqrsp;
1744         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
1745         struct lpfc_nodelist *pnode = rdata->pnode;
1746         unsigned long later;
1747         int ret = SUCCESS;
1748         int status;
1749         int cnt;
1750         struct lpfc_scsi_event_header scsi_event;
1751
1752         lpfc_block_error_handler(cmnd);
1753         /*
1754          * If target is not in a MAPPED state, delay the reset until
1755          * target is rediscovered or devloss timeout expires.
1756          */
1757         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1758         while (time_after(later, jiffies)) {
1759                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
1760                         return FAILED;
1761                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
1762                         break;
1763                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
1764                 rdata = cmnd->device->hostdata;
1765                 if (!rdata)
1766                         break;
1767                 pnode = rdata->pnode;
1768         }
1769
1770         scsi_event.event_type = FC_REG_SCSI_EVENT;
1771         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
1772         scsi_event.lun = 0;
1773         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
1774         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
1775
1776         fc_host_post_vendor_event(shost,
1777                 fc_get_event_number(),
1778                 sizeof(scsi_event),
1779                 (char *)&scsi_event,
1780                 LPFC_NL_VENDOR_ID);
1781
1782         if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
1783                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1784                                  "0721 LUN Reset rport "
1785                                  "failure: msec x%x rdata x%p\n",
1786                                  jiffies_to_msecs(jiffies - later), rdata);
1787                 return FAILED;
1788         }
1789         lpfc_cmd = lpfc_get_scsi_buf(phba);
1790         if (lpfc_cmd == NULL)
1791                 return FAILED;
1792         lpfc_cmd->timeout = 60;
1793         lpfc_cmd->rdata = rdata;
1794
1795         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
1796                                               cmnd->device->lun,
1797                                               FCP_TARGET_RESET);
1798         if (!status) {
1799                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1800                 return FAILED;
1801         }
1802         iocbq = &lpfc_cmd->cur_iocbq;
1803
1804         /* get a buffer for this IOCB command response */
1805         iocbqrsp = lpfc_sli_get_iocbq(phba);
1806         if (iocbqrsp == NULL) {
1807                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1808                 return FAILED;
1809         }
1810         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
1811                          "0703 Issue target reset to TGT %d LUN %d "
1812                          "rpi x%x nlp_flag x%x\n", cmnd->device->id,
1813                          cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1814         status = lpfc_sli_issue_iocb_wait(phba,
1815                                           &phba->sli.ring[phba->sli.fcp_ring],
1816                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
1817         if (status == IOCB_TIMEDOUT) {
1818                 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
1819                 ret = TIMEOUT_ERROR;
1820         } else {
1821                 if (status != IOCB_SUCCESS)
1822                         ret = FAILED;
1823                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1824         }
1825         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1826                          "0713 SCSI layer issued device reset (%d, %d) "
1827                          "return x%x status x%x result x%x\n",
1828                          cmnd->device->id, cmnd->device->lun, ret,
1829                          iocbqrsp->iocb.ulpStatus,
1830                          iocbqrsp->iocb.un.ulpWord[4]);
1831         lpfc_sli_release_iocbq(phba, iocbqrsp);
1832         cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
1833                                 LPFC_CTX_TGT);
1834         if (cnt)
1835                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1836                                     cmnd->device->id, cmnd->device->lun,
1837                                     LPFC_CTX_TGT);
1838         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1839         while (time_after(later, jiffies) && cnt) {
1840                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1841                 cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
1842                                         cmnd->device->lun, LPFC_CTX_TGT);
1843         }
1844         if (cnt) {
1845                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1846                                  "0719 device reset I/O flush failure: "
1847                                  "cnt x%x\n", cnt);
1848                 ret = FAILED;
1849         }
1850         return ret;
1851 }
1852
1853 /**
1854  * lpfc_bus_reset_handler: eh_bus_reset_handler entry point of Scsi Host
1855  * Template data structure.
1856  * @cmnd: Pointer to scsi_cmnd data structure.
1857  *
1858  * This routine does target reset to all target on @cmnd->device->host.
1859  *
1860  * Return Code:
1861  *   0x2003 - Error
1862  *   0x2002 - Success
1863  **/
1864 static int
1865 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
1866 {
1867         struct Scsi_Host  *shost = cmnd->device->host;
1868         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
1869         struct lpfc_hba   *phba = vport->phba;
1870         struct lpfc_nodelist *ndlp = NULL;
1871         int match;
1872         int ret = SUCCESS, status = SUCCESS, i;
1873         int cnt;
1874         struct lpfc_scsi_buf * lpfc_cmd;
1875         unsigned long later;
1876         struct lpfc_scsi_event_header scsi_event;
1877
1878         scsi_event.event_type = FC_REG_SCSI_EVENT;
1879         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
1880         scsi_event.lun = 0;
1881         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
1882         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
1883
1884         fc_host_post_vendor_event(shost,
1885                 fc_get_event_number(),
1886                 sizeof(scsi_event),
1887                 (char *)&scsi_event,
1888                 LPFC_NL_VENDOR_ID);
1889
1890         lpfc_block_error_handler(cmnd);
1891         /*
1892          * Since the driver manages a single bus device, reset all
1893          * targets known to the driver.  Should any target reset
1894          * fail, this routine returns failure to the midlayer.
1895          */
1896         for (i = 0; i < LPFC_MAX_TARGET; i++) {
1897                 /* Search for mapped node by target ID */
1898                 match = 0;
1899                 spin_lock_irq(shost->host_lock);
1900                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
1901                         if (!NLP_CHK_NODE_ACT(ndlp))
1902                                 continue;
1903                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
1904                             ndlp->nlp_sid == i &&
1905                             ndlp->rport) {
1906                                 match = 1;
1907                                 break;
1908                         }
1909                 }
1910                 spin_unlock_irq(shost->host_lock);
1911                 if (!match)
1912                         continue;
1913                 lpfc_cmd = lpfc_get_scsi_buf(phba);
1914                 if (lpfc_cmd) {
1915                         lpfc_cmd->timeout = 60;
1916                         status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
1917                                                      cmnd->device->lun,
1918                                                      ndlp->rport->dd_data);
1919                         if (status != TIMEOUT_ERROR)
1920                                 lpfc_release_scsi_buf(phba, lpfc_cmd);
1921                 }
1922                 if (!lpfc_cmd || status != SUCCESS) {
1923                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1924                                          "0700 Bus Reset on target %d failed\n",
1925                                          i);
1926                         ret = FAILED;
1927                 }
1928         }
1929         /*
1930          * All outstanding txcmplq I/Os should have been aborted by
1931          * the targets.  Unfortunately, some targets do not abide by
1932          * this forcing the driver to double check.
1933          */
1934         cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1935         if (cnt)
1936                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1937                                     0, 0, LPFC_CTX_HOST);
1938         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
1939         while (time_after(later, jiffies) && cnt) {
1940                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
1941                 cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
1942         }
1943         if (cnt) {
1944                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1945                                  "0715 Bus Reset I/O flush failure: "
1946                                  "cnt x%x left x%x\n", cnt, i);
1947                 ret = FAILED;
1948         }
1949         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
1950                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
1951         return ret;
1952 }
1953
1954 /**
1955  * lpfc_slave_alloc: slave_alloc entry point of Scsi Host Template data
1956  * structure.
1957  * @sdev: Pointer to scsi_device.
1958  *
1959  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
1960  * globally available list of scsi buffers. This routine also makes sure scsi
1961  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
1962  * of scsi buffer exists for the lifetime of the driver.
1963  *
1964  * Return codes:
1965  *   non-0 - Error
1966  *   0 - Success
1967  **/
1968 static int
1969 lpfc_slave_alloc(struct scsi_device *sdev)
1970 {
1971         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
1972         struct lpfc_hba   *phba = vport->phba;
1973         struct lpfc_scsi_buf *scsi_buf = NULL;
1974         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1975         uint32_t total = 0, i;
1976         uint32_t num_to_alloc = 0;
1977         unsigned long flags;
1978
1979         if (!rport || fc_remote_port_chkready(rport))
1980                 return -ENXIO;
1981
1982         sdev->hostdata = rport->dd_data;
1983
1984         /*
1985          * Populate the cmds_per_lun count scsi_bufs into this host's globally
1986          * available list of scsi buffers.  Don't allocate more than the
1987          * HBA limit conveyed to the midlayer via the host structure.  The
1988          * formula accounts for the lun_queue_depth + error handlers + 1
1989          * extra.  This list of scsi bufs exists for the lifetime of the driver.
1990          */
1991         total = phba->total_scsi_bufs;
1992         num_to_alloc = vport->cfg_lun_queue_depth + 2;
1993
1994         /* Allow some exchanges to be available always to complete discovery */
1995         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
1996                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
1997                                  "0704 At limitation of %d preallocated "
1998                                  "command buffers\n", total);
1999                 return 0;
2000         /* Allow some exchanges to be available always to complete discovery */
2001         } else if (total + num_to_alloc >
2002                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
2003                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2004                                  "0705 Allocation request of %d "
2005                                  "command buffers will exceed max of %d.  "
2006                                  "Reducing allocation request to %d.\n",
2007                                  num_to_alloc, phba->cfg_hba_queue_depth,
2008                                  (phba->cfg_hba_queue_depth - total));
2009                 num_to_alloc = phba->cfg_hba_queue_depth - total;
2010         }
2011
2012         for (i = 0; i < num_to_alloc; i++) {
2013                 scsi_buf = lpfc_new_scsi_buf(vport);
2014                 if (!scsi_buf) {
2015                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2016                                          "0706 Failed to allocate "
2017                                          "command buffer\n");
2018                         break;
2019                 }
2020
2021                 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
2022                 phba->total_scsi_bufs++;
2023                 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
2024                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
2025         }
2026         return 0;
2027 }
2028
2029 /**
2030  * lpfc_slave_configure: slave_configure entry point of Scsi Host Templater data
2031  *  structure.
2032  * @sdev: Pointer to scsi_device.
2033  *
2034  * This routine configures following items
2035  *   - Tag command queuing support for @sdev if supported.
2036  *   - Dev loss time out value of fc_rport.
2037  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
2038  *
2039  * Return codes:
2040  *   0 - Success
2041  **/
2042 static int
2043 lpfc_slave_configure(struct scsi_device *sdev)
2044 {
2045         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
2046         struct lpfc_hba   *phba = vport->phba;
2047         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
2048
2049         if (sdev->tagged_supported)
2050                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
2051         else
2052                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
2053
2054         /*
2055          * Initialize the fc transport attributes for the target
2056          * containing this scsi device.  Also note that the driver's
2057          * target pointer is stored in the starget_data for the
2058          * driver's sysfs entry point functions.
2059          */
2060         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
2061
2062         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2063                 lpfc_sli_poll_fcp_ring(phba);
2064                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
2065                         lpfc_poll_rearm_timer(phba);
2066         }
2067
2068         return 0;
2069 }
2070
2071 /**
2072  * lpfc_slave_destroy: slave_destroy entry point of SHT data structure.
2073  * @sdev: Pointer to scsi_device.
2074  *
2075  * This routine sets @sdev hostatdata filed to null.
2076  **/
2077 static void
2078 lpfc_slave_destroy(struct scsi_device *sdev)
2079 {
2080         sdev->hostdata = NULL;
2081         return;
2082 }
2083
2084
2085 struct scsi_host_template lpfc_template = {
2086         .module                 = THIS_MODULE,
2087         .name                   = LPFC_DRIVER_NAME,
2088         .info                   = lpfc_info,
2089         .queuecommand           = lpfc_queuecommand,
2090         .eh_abort_handler       = lpfc_abort_handler,
2091         .eh_device_reset_handler= lpfc_device_reset_handler,
2092         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
2093         .slave_alloc            = lpfc_slave_alloc,
2094         .slave_configure        = lpfc_slave_configure,
2095         .slave_destroy          = lpfc_slave_destroy,
2096         .scan_finished          = lpfc_scan_finished,
2097         .this_id                = -1,
2098         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
2099         .cmd_per_lun            = LPFC_CMD_PER_LUN,
2100         .use_clustering         = ENABLE_CLUSTERING,
2101         .shost_attrs            = lpfc_hba_attrs,
2102         .max_sectors            = 0xFFFF,
2103 };
2104
2105 struct scsi_host_template lpfc_vport_template = {
2106         .module                 = THIS_MODULE,
2107         .name                   = LPFC_DRIVER_NAME,
2108         .info                   = lpfc_info,
2109         .queuecommand           = lpfc_queuecommand,
2110         .eh_abort_handler       = lpfc_abort_handler,
2111         .eh_device_reset_handler= lpfc_device_reset_handler,
2112         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
2113         .slave_alloc            = lpfc_slave_alloc,
2114         .slave_configure        = lpfc_slave_configure,
2115         .slave_destroy          = lpfc_slave_destroy,
2116         .scan_finished          = lpfc_scan_finished,
2117         .this_id                = -1,
2118         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
2119         .cmd_per_lun            = LPFC_CMD_PER_LUN,
2120         .use_clustering         = ENABLE_CLUSTERING,
2121         .shost_attrs            = lpfc_vport_attrs,
2122         .max_sectors            = 0xFFFF,
2123 };