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) 2004-2009 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 #include <linux/pci.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/delay.h>
  25 #include <asm/unaligned.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_eh.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_tcq.h>
  32 #include <scsi/scsi_transport_fc.h>
  33
  34 #include "lpfc_version.h"
  35 #include "lpfc_hw4.h"
  36 #include "lpfc_hw.h"
  37 #include "lpfc_sli.h"
  38 #include "lpfc_sli4.h"
  39 #include "lpfc_nl.h"
  40 #include "lpfc_disc.h"
  41 #include "lpfc_scsi.h"
  42 #include "lpfc.h"
  43 #include "lpfc_logmsg.h"
  44 #include "lpfc_crtn.h"
  45 #include "lpfc_vport.h"
  46
  47 #define LPFC_RESET_WAIT  2
  48 #define LPFC_ABORT_WAIT  2
  49
  50 int _dump_buf_done;
  51
  52 static char *dif_op_str[] = {
  53         "SCSI_PROT_NORMAL",
  54         "SCSI_PROT_READ_INSERT",
  55         "SCSI_PROT_WRITE_STRIP",
  56         "SCSI_PROT_READ_STRIP",
  57         "SCSI_PROT_WRITE_INSERT",
  58         "SCSI_PROT_READ_PASS",
  59         "SCSI_PROT_WRITE_PASS",
  60 };
  61 static void
  62 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  63 static void
  64 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  65
  66 static void
  67 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  68 {
  69         void *src, *dst;
  70         struct scatterlist *sgde = scsi_sglist(cmnd);
  71
  72         if (!_dump_buf_data) {
  73                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  74                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  75                                 __func__);
  76                 return;
  77         }
  78
  79
  80         if (!sgde) {
  81                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  82                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
  83                 return;
  84         }
  85
  86         dst = (void *) _dump_buf_data;
  87         while (sgde) {
  88                 src = sg_virt(sgde);
  89                 memcpy(dst, src, sgde->length);
  90                 dst += sgde->length;
  91                 sgde = sg_next(sgde);
  92         }
  93 }
  94
  95 static void
  96 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  97 {
  98         void *src, *dst;
  99         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 100
 101         if (!_dump_buf_dif) {
 102                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 103                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 104                                 __func__);
 105                 return;
 106         }
 107
 108         if (!sgde) {
 109                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 110                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 111                 return;
 112         }
 113
 114         dst = _dump_buf_dif;
 115         while (sgde) {
 116                 src = sg_virt(sgde);
 117                 memcpy(dst, src, sgde->length);
 118                 dst += sgde->length;
 119                 sgde = sg_next(sgde);
 120         }
 121 }
 122
 123 /**
 124  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 125  * @phba: Pointer to HBA object.
 126  * @lpfc_cmd: lpfc scsi command object pointer.
 127  *
 128  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 129  * set the last bit in the response sge entry.
 130  **/
 131 static void
 132 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 133                                 struct lpfc_scsi_buf *lpfc_cmd)
 134 {
 135         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 136         if (sgl) {
 137                 sgl += 1;
 138                 sgl->word2 = le32_to_cpu(sgl->word2);
 139                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 140                 sgl->word2 = cpu_to_le32(sgl->word2);
 141         }
 142 }
 143
 144 /**
 145  * lpfc_update_stats - Update statistical data for the command completion
 146  * @phba: Pointer to HBA object.
 147  * @lpfc_cmd: lpfc scsi command object pointer.
 148  *
 149  * This function is called when there is a command completion and this
 150  * function updates the statistical data for the command completion.
 151  **/
 152 static void
 153 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 154 {
 155         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 156         struct lpfc_nodelist *pnode = rdata->pnode;
 157         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 158         unsigned long flags;
 159         struct Scsi_Host  *shost = cmd->device->host;
 160         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 161         unsigned long latency;
 162         int i;
 163
 164         if (cmd->result)
 165                 return;
 166
 167         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 168
 169         spin_lock_irqsave(shost->host_lock, flags);
 170         if (!vport->stat_data_enabled ||
 171                 vport->stat_data_blocked ||
 172                 !pnode->lat_data ||
 173                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 174                 spin_unlock_irqrestore(shost->host_lock, flags);
 175                 return;
 176         }
 177
 178         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 179                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 180                         phba->bucket_step;
 181                 /* check array subscript bounds */
 182                 if (i < 0)
 183                         i = 0;
 184                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 185                         i = LPFC_MAX_BUCKET_COUNT - 1;
 186         } else {
 187                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 188                         if (latency <= (phba->bucket_base +
 189                                 ((1<<i)*phba->bucket_step)))
 190                                 break;
 191         }
 192
 193         pnode->lat_data[i].cmd_count++;
 194         spin_unlock_irqrestore(shost->host_lock, flags);
 195 }
 196
 197 /**
 198  * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
 199  * @phba: Pointer to HBA context object.
 200  * @vport: Pointer to vport object.
 201  * @ndlp: Pointer to FC node associated with the target.
 202  * @lun: Lun number of the scsi device.
 203  * @old_val: Old value of the queue depth.
 204  * @new_val: New value of the queue depth.
 205  *
 206  * This function sends an event to the mgmt application indicating
 207  * there is a change in the scsi device queue depth.
 208  **/
 209 static void
 210 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 211                 struct lpfc_vport  *vport,
 212                 struct lpfc_nodelist *ndlp,
 213                 uint32_t lun,
 214                 uint32_t old_val,
 215                 uint32_t new_val)
 216 {
 217         struct lpfc_fast_path_event *fast_path_evt;
 218         unsigned long flags;
 219
 220         fast_path_evt = lpfc_alloc_fast_evt(phba);
 221         if (!fast_path_evt)
 222                 return;
 223
 224         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 225                 FC_REG_SCSI_EVENT;
 226         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 227                 LPFC_EVENT_VARQUEDEPTH;
 228
 229         /* Report all luns with change in queue depth */
 230         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 231         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 232                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 233                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 234                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 235                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 236         }
 237
 238         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 239         fast_path_evt->un.queue_depth_evt.newval = new_val;
 240         fast_path_evt->vport = vport;
 241
 242         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 243         spin_lock_irqsave(&phba->hbalock, flags);
 244         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 245         spin_unlock_irqrestore(&phba->hbalock, flags);
 246         lpfc_worker_wake_up(phba);
 247
 248         return;
 249 }
 250
 251 /**
 252  * lpfc_change_queue_depth - Alter scsi device queue depth
 253  * @sdev: Pointer the scsi device on which to change the queue depth.
 254  * @qdepth: New queue depth to set the sdev to.
 255  * @reason: The reason for the queue depth change.
 256  *
 257  * This function is called by the midlayer and the LLD to alter the queue
 258  * depth for a scsi device. This function sets the queue depth to the new
 259  * value and sends an event out to log the queue depth change.
 260  **/
 261 int
 262 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 263 {
 264         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
 265         struct lpfc_hba   *phba = vport->phba;
 266         struct lpfc_rport_data *rdata;
 267         unsigned long new_queue_depth, old_queue_depth;
 268
 269         old_queue_depth = sdev->queue_depth;
 270         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
 271         new_queue_depth = sdev->queue_depth;
 272         rdata = sdev->hostdata;
 273         if (rdata)
 274                 lpfc_send_sdev_queuedepth_change_event(phba, vport,
 275                                                        rdata->pnode, sdev->lun,
 276                                                        old_queue_depth,
 277                                                        new_queue_depth);
 278         return sdev->queue_depth;
 279 }
 280
 281 /**
 282  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 283  * @phba: The Hba for which this call is being executed.
 284  *
 285  * This routine is called when there is resource error in driver or firmware.
 286  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 287  * posts at most 1 event each second. This routine wakes up worker thread of
 288  * @phba to process WORKER_RAM_DOWN_EVENT event.
 289  *
 290  * This routine should be called with no lock held.
 291  **/
 292 void
 293 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 294 {
 295         unsigned long flags;
 296         uint32_t evt_posted;
 297
 298         spin_lock_irqsave(&phba->hbalock, flags);
 299         atomic_inc(&phba->num_rsrc_err);
 300         phba->last_rsrc_error_time = jiffies;
 301
 302         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 303                 spin_unlock_irqrestore(&phba->hbalock, flags);
 304                 return;
 305         }
 306
 307         phba->last_ramp_down_time = jiffies;
 308
 309         spin_unlock_irqrestore(&phba->hbalock, flags);
 310
 311         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 312         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 313         if (!evt_posted)
 314                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 315         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 316
 317         if (!evt_posted)
 318                 lpfc_worker_wake_up(phba);
 319         return;
 320 }
 321
 322 /**
 323  * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
 324  * @phba: The Hba for which this call is being executed.
 325  *
 326  * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 327  * post at most 1 event every 5 minute after last_ramp_up_time or
 328  * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 329  * to process WORKER_RAM_DOWN_EVENT event.
 330  *
 331  * This routine should be called with no lock held.
 332  **/
 333 static inline void
 334 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 335                         uint32_t queue_depth)
 336 {
 337         unsigned long flags;
 338         struct lpfc_hba *phba = vport->phba;
 339         uint32_t evt_posted;
 340         atomic_inc(&phba->num_cmd_success);
 341
 342         if (vport->cfg_lun_queue_depth <= queue_depth)
 343                 return;
 344         spin_lock_irqsave(&phba->hbalock, flags);
 345         if (time_before(jiffies,
 346                         phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
 347             time_before(jiffies,
 348                         phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
 349                 spin_unlock_irqrestore(&phba->hbalock, flags);
 350                 return;
 351         }
 352         phba->last_ramp_up_time = jiffies;
 353         spin_unlock_irqrestore(&phba->hbalock, flags);
 354
 355         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 356         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 357         if (!evt_posted)
 358                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 359         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 360
 361         if (!evt_posted)
 362                 lpfc_worker_wake_up(phba);
 363         return;
 364 }
 365
 366 /**
 367  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 368  * @phba: The Hba for which this call is being executed.
 369  *
 370  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 371  * thread.This routine reduces queue depth for all scsi device on each vport
 372  * associated with @phba.
 373  **/
 374 void
 375 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 376 {
 377         struct lpfc_vport **vports;
 378         struct Scsi_Host  *shost;
 379         struct scsi_device *sdev;
 380         unsigned long new_queue_depth;
 381         unsigned long num_rsrc_err, num_cmd_success;
 382         int i;
 383
 384         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 385         num_cmd_success = atomic_read(&phba->num_cmd_success);
 386
 387         vports = lpfc_create_vport_work_array(phba);
 388         if (vports != NULL)
 389                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 390                         shost = lpfc_shost_from_vport(vports[i]);
 391                         shost_for_each_device(sdev, shost) {
 392                                 new_queue_depth =
 393                                         sdev->queue_depth * num_rsrc_err /
 394                                         (num_rsrc_err + num_cmd_success);
 395                                 if (!new_queue_depth)
 396                                         new_queue_depth = sdev->queue_depth - 1;
 397                                 else
 398                                         new_queue_depth = sdev->queue_depth -
 399                                                                 new_queue_depth;
 400                                 lpfc_change_queue_depth(sdev, new_queue_depth,
 401                                                         SCSI_QDEPTH_DEFAULT);
 402                         }
 403                 }
 404         lpfc_destroy_vport_work_array(phba, vports);
 405         atomic_set(&phba->num_rsrc_err, 0);
 406         atomic_set(&phba->num_cmd_success, 0);
 407 }
 408
 409 /**
 410  * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
 411  * @phba: The Hba for which this call is being executed.
 412  *
 413  * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 414  * thread.This routine increases queue depth for all scsi device on each vport
 415  * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 416  * num_cmd_success to zero.
 417  **/
 418 void
 419 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 420 {
 421         struct lpfc_vport **vports;
 422         struct Scsi_Host  *shost;
 423         struct scsi_device *sdev;
 424         int i;
 425
 426         vports = lpfc_create_vport_work_array(phba);
 427         if (vports != NULL)
 428                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 429                         shost = lpfc_shost_from_vport(vports[i]);
 430                         shost_for_each_device(sdev, shost) {
 431                                 if (vports[i]->cfg_lun_queue_depth <=
 432                                     sdev->queue_depth)
 433                                         continue;
 434                                 lpfc_change_queue_depth(sdev,
 435                                                         sdev->queue_depth+1,
 436                                                         SCSI_QDEPTH_RAMP_UP);
 437                         }
 438                 }
 439         lpfc_destroy_vport_work_array(phba, vports);
 440         atomic_set(&phba->num_rsrc_err, 0);
 441         atomic_set(&phba->num_cmd_success, 0);
 442 }
 443
 444 /**
 445  * lpfc_scsi_dev_block - set all scsi hosts to block state
 446  * @phba: Pointer to HBA context object.
 447  *
 448  * This function walks vport list and set each SCSI host to block state
 449  * by invoking fc_remote_port_delete() routine. This function is invoked
 450  * with EEH when device's PCI slot has been permanently disabled.
 451  **/
 452 void
 453 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 454 {
 455         struct lpfc_vport **vports;
 456         struct Scsi_Host  *shost;
 457         struct scsi_device *sdev;
 458         struct fc_rport *rport;
 459         int i;
 460
 461         vports = lpfc_create_vport_work_array(phba);
 462         if (vports != NULL)
 463                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 464                         shost = lpfc_shost_from_vport(vports[i]);
 465                         shost_for_each_device(sdev, shost) {
 466                                 rport = starget_to_rport(scsi_target(sdev));
 467                                 fc_remote_port_delete(rport);
 468                         }
 469                 }
 470         lpfc_destroy_vport_work_array(phba, vports);
 471 }
 472
 473 /**
 474  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 475  * @vport: The virtual port for which this call being executed.
 476  * @num_to_allocate: The requested number of buffers to allocate.
 477  *
 478  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 479  * the scsi buffer contains all the necessary information needed to initiate
 480  * a SCSI I/O. The non-DMAable buffer region contains information to build
 481  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 482  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 483  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 484  *
 485  * Return codes:
 486  *   int - number of scsi buffers that were allocated.
 487  *   0 = failure, less than num_to_alloc is a partial failure.
 488  **/
 489 static int
 490 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 491 {
 492         struct lpfc_hba *phba = vport->phba;
 493         struct lpfc_scsi_buf *psb;
 494         struct ulp_bde64 *bpl;
 495         IOCB_t *iocb;
 496         dma_addr_t pdma_phys_fcp_cmd;
 497         dma_addr_t pdma_phys_fcp_rsp;
 498         dma_addr_t pdma_phys_bpl;
 499         uint16_t iotag;
 500         int bcnt;
 501
 502         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 503                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 504                 if (!psb)
 505                         break;
 506
 507                 /*
 508                  * Get memory from the pci pool to map the virt space to pci
 509                  * bus space for an I/O.  The DMA buffer includes space for the
 510                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 511                  * necessary to support the sg_tablesize.
 512                  */
 513                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 514                                         GFP_KERNEL, &psb->dma_handle);
 515                 if (!psb->data) {
 516                         kfree(psb);
 517                         break;
 518                 }
 519
 520                 /* Initialize virtual ptrs to dma_buf region. */
 521                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 522
 523                 /* Allocate iotag for psb->cur_iocbq. */
 524                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 525                 if (iotag == 0) {
 526                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 527                                         psb->data, psb->dma_handle);
 528                         kfree(psb);
 529                         break;
 530                 }
 531                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 532
 533                 psb->fcp_cmnd = psb->data;
 534                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 535                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 536                         sizeof(struct fcp_rsp);
 537
 538                 /* Initialize local short-hand pointers. */
 539                 bpl = psb->fcp_bpl;
 540                 pdma_phys_fcp_cmd = psb->dma_handle;
 541                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 542                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 543                         sizeof(struct fcp_rsp);
 544
 545                 /*
 546                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 547                  * are sg list bdes.  Initialize the first two and leave the
 548                  * rest for queuecommand.
 549                  */
 550                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 551                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 552                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 553                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 554                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 555
 556                 /* Setup the physical region for the FCP RSP */
 557                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 558                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 559                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 560                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 561                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 562
 563                 /*
 564                  * Since the IOCB for the FCP I/O is built into this
 565                  * lpfc_scsi_buf, initialize it with all known data now.
 566                  */
 567                 iocb = &psb->cur_iocbq.iocb;
 568                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 569                 if ((phba->sli_rev == 3) &&
 570                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 571                         /* fill in immediate fcp command BDE */
 572                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 573                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 574                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 575                                         unsli3.fcp_ext.icd);
 576                         iocb->un.fcpi64.bdl.addrHigh = 0;
 577                         iocb->ulpBdeCount = 0;
 578                         iocb->ulpLe = 0;
 579                         /* fill in responce BDE */
 580                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 581                                                         BUFF_TYPE_BDE_64;
 582                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 583                                 sizeof(struct fcp_rsp);
 584                         iocb->unsli3.fcp_ext.rbde.addrLow =
 585                                 putPaddrLow(pdma_phys_fcp_rsp);
 586                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 587                                 putPaddrHigh(pdma_phys_fcp_rsp);
 588                 } else {
 589                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 590                         iocb->un.fcpi64.bdl.bdeSize =
 591                                         (2 * sizeof(struct ulp_bde64));
 592                         iocb->un.fcpi64.bdl.addrLow =
 593                                         putPaddrLow(pdma_phys_bpl);
 594                         iocb->un.fcpi64.bdl.addrHigh =
 595                                         putPaddrHigh(pdma_phys_bpl);
 596                         iocb->ulpBdeCount = 1;
 597                         iocb->ulpLe = 1;
 598                 }
 599                 iocb->ulpClass = CLASS3;
 600                 psb->status = IOSTAT_SUCCESS;
 601                 /* Put it back into the SCSI buffer list */
 602                 lpfc_release_scsi_buf_s3(phba, psb);
 603
 604         }
 605
 606         return bcnt;
 607 }
 608
 609 /**
 610  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 611  * @phba: pointer to lpfc hba data structure.
 612  * @axri: pointer to the fcp xri abort wcqe structure.
 613  *
 614  * This routine is invoked by the worker thread to process a SLI4 fast-path
 615  * FCP aborted xri.
 616  **/
 617 void
 618 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 619                           struct sli4_wcqe_xri_aborted *axri)
 620 {
 621         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 622         struct lpfc_scsi_buf *psb, *next_psb;
 623         unsigned long iflag = 0;
 624         struct lpfc_iocbq *iocbq;
 625         int i;
 626         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 627
 628         spin_lock_irqsave(&phba->hbalock, iflag);
 629         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 630         list_for_each_entry_safe(psb, next_psb,
 631                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 632                 if (psb->cur_iocbq.sli4_xritag == xri) {
 633                         list_del(&psb->list);
 634                         psb->exch_busy = 0;
 635                         psb->status = IOSTAT_SUCCESS;
 636                         spin_unlock(
 637                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 638                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 639                         lpfc_release_scsi_buf_s4(phba, psb);
 640                         return;
 641                 }
 642         }
 643         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 644         for (i = 1; i <= phba->sli.last_iotag; i++) {
 645                 iocbq = phba->sli.iocbq_lookup[i];
 646
 647                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 648                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 649                         continue;
 650                 if (iocbq->sli4_xritag != xri)
 651                         continue;
 652                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 653                 psb->exch_busy = 0;
 654                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 655                 if (pring->txq_cnt)
 656                         lpfc_worker_wake_up(phba);
 657                 return;
 658
 659         }
 660         spin_unlock_irqrestore(&phba->hbalock, iflag);
 661 }
 662
 663 /**
 664  * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
 665  * @phba: pointer to lpfc hba data structure.
 666  *
 667  * This routine walks the list of scsi buffers that have been allocated and
 668  * repost them to the HBA by using SGL block post. This is needed after a
 669  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 670  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 671  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 672  *
 673  * Returns: 0 = success, non-zero failure.
 674  **/
 675 int
 676 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 677 {
 678         struct lpfc_scsi_buf *psb;
 679         int index, status, bcnt = 0, rcnt = 0, rc = 0;
 680         LIST_HEAD(sblist);
 681
 682         for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
 683                 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
 684                 if (psb) {
 685                         /* Remove from SCSI buffer list */
 686                         list_del(&psb->list);
 687                         /* Add it to a local SCSI buffer list */
 688                         list_add_tail(&psb->list, &sblist);
 689                         if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 690                                 bcnt = rcnt;
 691                                 rcnt = 0;
 692                         }
 693                 } else
 694                         /* A hole present in the XRI array, need to skip */
 695                         bcnt = rcnt;
 696
 697                 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
 698                         /* End of XRI array for SCSI buffer, complete */
 699                         bcnt = rcnt;
 700
 701                 /* Continue until collect up to a nembed page worth of sgls */
 702                 if (bcnt == 0)
 703                         continue;
 704                 /* Now, post the SCSI buffer list sgls as a block */
 705                 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
 706                 /* Reset SCSI buffer count for next round of posting */
 707                 bcnt = 0;
 708                 while (!list_empty(&sblist)) {
 709                         list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
 710                                          list);
 711                         if (status) {
 712                                 /* Put this back on the abort scsi list */
 713                                 psb->exch_busy = 1;
 714                                 rc++;
 715                         } else {
 716                                 psb->exch_busy = 0;
 717                                 psb->status = IOSTAT_SUCCESS;
 718                         }
 719                         /* Put it back into the SCSI buffer list */
 720                         lpfc_release_scsi_buf_s4(phba, psb);
 721                 }
 722         }
 723         return rc;
 724 }
 725
 726 /**
 727  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 728  * @vport: The virtual port for which this call being executed.
 729  * @num_to_allocate: The requested number of buffers to allocate.
 730  *
 731  * This routine allocates a scsi buffer for device with SLI-4 interface spec,
 732  * the scsi buffer contains all the necessary information needed to initiate
 733  * a SCSI I/O.
 734  *
 735  * Return codes:
 736  *   int - number of scsi buffers that were allocated.
 737  *   0 = failure, less than num_to_alloc is a partial failure.
 738  **/
 739 static int
 740 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 741 {
 742         struct lpfc_hba *phba = vport->phba;
 743         struct lpfc_scsi_buf *psb;
 744         struct sli4_sge *sgl;
 745         IOCB_t *iocb;
 746         dma_addr_t pdma_phys_fcp_cmd;
 747         dma_addr_t pdma_phys_fcp_rsp;
 748         dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
 749         uint16_t iotag, last_xritag = NO_XRI;
 750         int status = 0, index;
 751         int bcnt;
 752         int non_sequential_xri = 0;
 753         LIST_HEAD(sblist);
 754
 755         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 756                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 757                 if (!psb)
 758                         break;
 759
 760                 /*
 761                  * Get memory from the pci pool to map the virt space to pci bus
 762                  * space for an I/O.  The DMA buffer includes space for the
 763                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 764                  * necessary to support the sg_tablesize.
 765                  */
 766                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 767                                                 GFP_KERNEL, &psb->dma_handle);
 768                 if (!psb->data) {
 769                         kfree(psb);
 770                         break;
 771                 }
 772
 773                 /* Initialize virtual ptrs to dma_buf region. */
 774                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 775
 776                 /* Allocate iotag for psb->cur_iocbq. */
 777                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 778                 if (iotag == 0) {
 779                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 780                                 psb->data, psb->dma_handle);
 781                         kfree(psb);
 782                         break;
 783                 }
 784
 785                 psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
 786                 if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
 787                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 788                               psb->data, psb->dma_handle);
 789                         kfree(psb);
 790                         break;
 791                 }
 792                 if (last_xritag != NO_XRI
 793                         && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
 794                         non_sequential_xri = 1;
 795                 } else
 796                         list_add_tail(&psb->list, &sblist);
 797                 last_xritag = psb->cur_iocbq.sli4_xritag;
 798
 799                 index = phba->sli4_hba.scsi_xri_cnt++;
 800                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 801
 802                 psb->fcp_bpl = psb->data;
 803                 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
 804                         - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 805                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 806                                         sizeof(struct fcp_cmnd));
 807
 808                 /* Initialize local short-hand pointers. */
 809                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 810                 pdma_phys_bpl = psb->dma_handle;
 811                 pdma_phys_fcp_cmd =
 812                         (psb->dma_handle + phba->cfg_sg_dma_buf_size)
 813                          - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 814                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 815
 816                 /*
 817                  * The first two bdes are the FCP_CMD and FCP_RSP.  The balance
 818                  * are sg list bdes.  Initialize the first two and leave the
 819                  * rest for queuecommand.
 820                  */
 821                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 822                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 823                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 824                 sgl->word2 = cpu_to_le32(sgl->word2);
 825                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 826                 sgl++;
 827
 828                 /* Setup the physical region for the FCP RSP */
 829                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 830                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 831                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 832                 sgl->word2 = cpu_to_le32(sgl->word2);
 833                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 834
 835                 /*
 836                  * Since the IOCB for the FCP I/O is built into this
 837                  * lpfc_scsi_buf, initialize it with all known data now.
 838                  */
 839                 iocb = &psb->cur_iocbq.iocb;
 840                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 841                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 842                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
 843                  * We are setting the bpl to point to out sgl. An sgl's
 844                  * entries are 16 bytes, a bpl entries are 12 bytes.
 845                  */
 846                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 847                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 848                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 849                 iocb->ulpBdeCount = 1;
 850                 iocb->ulpLe = 1;
 851                 iocb->ulpClass = CLASS3;
 852                 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
 853                         pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
 854                 else
 855                         pdma_phys_bpl1 = 0;
 856                 psb->dma_phys_bpl = pdma_phys_bpl;
 857                 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
 858                 if (non_sequential_xri) {
 859                         status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
 860                                                 pdma_phys_bpl1,
 861                                                 psb->cur_iocbq.sli4_xritag);
 862                         if (status) {
 863                                 /* Put this back on the abort scsi list */
 864                                 psb->exch_busy = 1;
 865                         } else {
 866                                 psb->exch_busy = 0;
 867                                 psb->status = IOSTAT_SUCCESS;
 868                         }
 869                         /* Put it back into the SCSI buffer list */
 870                         lpfc_release_scsi_buf_s4(phba, psb);
 871                         break;
 872                 }
 873         }
 874         if (bcnt) {
 875                 status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
 876                 /* Reset SCSI buffer count for next round of posting */
 877                 while (!list_empty(&sblist)) {
 878                         list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
 879                                  list);
 880                         if (status) {
 881                                 /* Put this back on the abort scsi list */
 882                                 psb->exch_busy = 1;
 883                         } else {
 884                                 psb->exch_busy = 0;
 885                                 psb->status = IOSTAT_SUCCESS;
 886                         }
 887                         /* Put it back into the SCSI buffer list */
 888                         lpfc_release_scsi_buf_s4(phba, psb);
 889                 }
 890         }
 891
 892         return bcnt + non_sequential_xri;
 893 }
 894
 895 /**
 896  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 897  * @vport: The virtual port for which this call being executed.
 898  * @num_to_allocate: The requested number of buffers to allocate.
 899  *
 900  * This routine wraps the actual SCSI buffer allocator function pointer from
 901  * the lpfc_hba struct.
 902  *
 903  * Return codes:
 904  *   int - number of scsi buffers that were allocated.
 905  *   0 = failure, less than num_to_alloc is a partial failure.
 906  **/
 907 static inline int
 908 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
 909 {
 910         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
 911 }
 912
 913 /**
 914  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 915  * @phba: The HBA for which this call is being executed.
 916  *
 917  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 918  * and returns to caller.
 919  *
 920  * Return codes:
 921  *   NULL - Error
 922  *   Pointer to lpfc_scsi_buf - Success
 923  **/
 924 static struct lpfc_scsi_buf*
 925 lpfc_get_scsi_buf(struct lpfc_hba * phba)
 926 {
 927         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 928         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 929         unsigned long iflag = 0;
 930
 931         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 932         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
 933         if (lpfc_cmd) {
 934                 lpfc_cmd->seg_cnt = 0;
 935                 lpfc_cmd->nonsg_phys = 0;
 936                 lpfc_cmd->prot_seg_cnt = 0;
 937         }
 938         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 939         return  lpfc_cmd;
 940 }
 941
 942 /**
 943  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
 944  * @phba: The Hba for which this call is being executed.
 945  * @psb: The scsi buffer which is being released.
 946  *
 947  * This routine releases @psb scsi buffer by adding it to tail of @phba
 948  * lpfc_scsi_buf_list list.
 949  **/
 950 static void
 951 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 952 {
 953         unsigned long iflag = 0;
 954
 955         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 956         psb->pCmd = NULL;
 957         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 958         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 959 }
 960
 961 /**
 962  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
 963  * @phba: The Hba for which this call is being executed.
 964  * @psb: The scsi buffer which is being released.
 965  *
 966  * This routine releases @psb scsi buffer by adding it to tail of @phba
 967  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
 968  * and cannot be reused for at least RA_TOV amount of time if it was
 969  * aborted.
 970  **/
 971 static void
 972 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 973 {
 974         unsigned long iflag = 0;
 975
 976         if (psb->exch_busy) {
 977                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
 978                                         iflag);
 979                 psb->pCmd = NULL;
 980                 list_add_tail(&psb->list,
 981                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
 982                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
 983                                         iflag);
 984         } else {
 985
 986                 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 987                 psb->pCmd = NULL;
 988                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
 989                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
 990         }
 991 }
 992
 993 /**
 994  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 995  * @phba: The Hba for which this call is being executed.
 996  * @psb: The scsi buffer which is being released.
 997  *
 998  * This routine releases @psb scsi buffer by adding it to tail of @phba
 999  * lpfc_scsi_buf_list list.
1000  **/
1001 static void
1002 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1003 {
1004
1005         phba->lpfc_release_scsi_buf(phba, psb);
1006 }
1007
1008 /**
1009  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1010  * @phba: The Hba for which this call is being executed.
1011  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1012  *
1013  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1014  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1015  * through sg elements and format the bdea. This routine also initializes all
1016  * IOCB fields which are dependent on scsi command request buffer.
1017  *
1018  * Return codes:
1019  *   1 - Error
1020  *   0 - Success
1021  **/
1022 static int
1023 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1024 {
1025         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1026         struct scatterlist *sgel = NULL;
1027         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1028         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1029         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1030         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1031         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1032         dma_addr_t physaddr;
1033         uint32_t num_bde = 0;
1034         int nseg, datadir = scsi_cmnd->sc_data_direction;
1035
1036         /*
1037          * There are three possibilities here - use scatter-gather segment, use
1038          * the single mapping, or neither.  Start the lpfc command prep by
1039          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1040          * data bde entry.
1041          */
1042         bpl += 2;
1043         if (scsi_sg_count(scsi_cmnd)) {
1044                 /*
1045                  * The driver stores the segment count returned from pci_map_sg
1046                  * because this a count of dma-mappings used to map the use_sg
1047                  * pages.  They are not guaranteed to be the same for those
1048                  * architectures that implement an IOMMU.
1049                  */
1050
1051                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1052                                   scsi_sg_count(scsi_cmnd), datadir);
1053                 if (unlikely(!nseg))
1054                         return 1;
1055
1056                 lpfc_cmd->seg_cnt = nseg;
1057                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1058                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1059                                 "9064 BLKGRD: %s: Too many sg segments from "
1060                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1061                                __func__, phba->cfg_sg_seg_cnt,
1062                                lpfc_cmd->seg_cnt);
1063                         scsi_dma_unmap(scsi_cmnd);
1064                         return 1;
1065                 }
1066
1067                 /*
1068                  * The driver established a maximum scatter-gather segment count
1069                  * during probe that limits the number of sg elements in any
1070                  * single scsi command.  Just run through the seg_cnt and format
1071                  * the bde's.
1072                  * When using SLI-3 the driver will try to fit all the BDEs into
1073                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1074                  * does for SLI-2 mode.
1075                  */
1076                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1077                         physaddr = sg_dma_address(sgel);
1078                         if (phba->sli_rev == 3 &&
1079                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1080                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1081                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1082                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1083                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1084                                 data_bde->addrLow = putPaddrLow(physaddr);
1085                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1086                                 data_bde++;
1087                         } else {
1088                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1089                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1090                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1091                                 bpl->addrLow =
1092                                         le32_to_cpu(putPaddrLow(physaddr));
1093                                 bpl->addrHigh =
1094                                         le32_to_cpu(putPaddrHigh(physaddr));
1095                                 bpl++;
1096                         }
1097                 }
1098         }
1099
1100         /*
1101          * Finish initializing those IOCB fields that are dependent on the
1102          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1103          * explicitly reinitialized and for SLI-3 the extended bde count is
1104          * explicitly reinitialized since all iocb memory resources are reused.
1105          */
1106         if (phba->sli_rev == 3 &&
1107             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1108             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1109                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1110                         /*
1111                          * The extended IOCB format can only fit 3 BDE or a BPL.
1112                          * This I/O has more than 3 BDE so the 1st data bde will
1113                          * be a BPL that is filled in here.
1114                          */
1115                         physaddr = lpfc_cmd->dma_handle;
1116                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1117                         data_bde->tus.f.bdeSize = (num_bde *
1118                                                    sizeof(struct ulp_bde64));
1119                         physaddr += (sizeof(struct fcp_cmnd) +
1120                                      sizeof(struct fcp_rsp) +
1121                                      (2 * sizeof(struct ulp_bde64)));
1122                         data_bde->addrHigh = putPaddrHigh(physaddr);
1123                         data_bde->addrLow = putPaddrLow(physaddr);
1124                         /* ebde count includes the responce bde and data bpl */
1125                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1126                 } else {
1127                         /* ebde count includes the responce bde and data bdes */
1128                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1129                 }
1130         } else {
1131                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1132                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1133                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1134         }
1135         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1136
1137         /*
1138          * Due to difference in data length between DIF/non-DIF paths,
1139          * we need to set word 4 of IOCB here
1140          */
1141         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1142         return 0;
1143 }
1144
1145 /*
1146  * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1147  * @sc: The SCSI command to examine
1148  * @txopt: (out) BlockGuard operation for transmitted data
1149  * @rxopt: (out) BlockGuard operation for received data
1150  *
1151  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1152  *
1153  */
1154 static int
1155 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1156                 uint8_t *txop, uint8_t *rxop)
1157 {
1158         uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1159         uint8_t ret = 0;
1160
1161         if (guard_type == SHOST_DIX_GUARD_IP) {
1162                 switch (scsi_get_prot_op(sc)) {
1163                 case SCSI_PROT_READ_INSERT:
1164                 case SCSI_PROT_WRITE_STRIP:
1165                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1166                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1167                         break;
1168
1169                 case SCSI_PROT_READ_STRIP:
1170                 case SCSI_PROT_WRITE_INSERT:
1171                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1172                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1173                         break;
1174
1175                 case SCSI_PROT_READ_PASS:
1176                 case SCSI_PROT_WRITE_PASS:
1177                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1178                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1179                         break;
1180
1181                 case SCSI_PROT_NORMAL:
1182                 default:
1183                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1184                                 "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1185                                         scsi_get_prot_op(sc), guard_type);
1186                         ret = 1;
1187                         break;
1188
1189                 }
1190         } else if (guard_type == SHOST_DIX_GUARD_CRC) {
1191                 switch (scsi_get_prot_op(sc)) {
1192                 case SCSI_PROT_READ_STRIP:
1193                 case SCSI_PROT_WRITE_INSERT:
1194                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1195                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1196                         break;
1197
1198                 case SCSI_PROT_READ_PASS:
1199                 case SCSI_PROT_WRITE_PASS:
1200                         *txop = BG_OP_IN_CRC_OUT_CRC;
1201                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1202                         break;
1203
1204                 case SCSI_PROT_READ_INSERT:
1205                 case SCSI_PROT_WRITE_STRIP:
1206                 case SCSI_PROT_NORMAL:
1207                 default:
1208                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1209                                 "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1210                                         scsi_get_prot_op(sc), guard_type);
1211                         ret = 1;
1212                         break;
1213                 }
1214         } else {
1215                 /* unsupported format */
1216                 BUG();
1217         }
1218
1219         return ret;
1220 }
1221
1222 struct scsi_dif_tuple {
1223         __be16 guard_tag;       /* Checksum */
1224         __be16 app_tag;         /* Opaque storage */
1225         __be32 ref_tag;         /* Target LBA or indirect LBA */
1226 };
1227
1228 static inline unsigned
1229 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1230 {
1231         return sc->device->sector_size;
1232 }
1233
1234 /**
1235  * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
1236  * @sc:             in: SCSI command
1237  * @apptagmask:     out: app tag mask
1238  * @apptagval:      out: app tag value
1239  * @reftag:         out: ref tag (reference tag)
1240  *
1241  * Description:
1242  *   Extract DIF parameters from the command if possible.  Otherwise,
1243  *   use default parameters.
1244  *
1245  **/
1246 static inline void
1247 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
1248                 uint16_t *apptagval, uint32_t *reftag)
1249 {
1250         struct  scsi_dif_tuple *spt;
1251         unsigned char op = scsi_get_prot_op(sc);
1252         unsigned int protcnt = scsi_prot_sg_count(sc);
1253         static int cnt;
1254
1255         if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1256                                 op == SCSI_PROT_WRITE_PASS)) {
1257
1258                 cnt++;
1259                 spt = page_address(sg_page(scsi_prot_sglist(sc))) +
1260                         scsi_prot_sglist(sc)[0].offset;
1261                 *apptagmask = 0;
1262                 *apptagval = 0;
1263                 *reftag = cpu_to_be32(spt->ref_tag);
1264
1265         } else {
1266                 /* SBC defines ref tag to be lower 32bits of LBA */
1267                 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
1268                 *apptagmask = 0;
1269                 *apptagval = 0;
1270         }
1271 }
1272
1273 /*
1274  * This function sets up buffer list for protection groups of
1275  * type LPFC_PG_TYPE_NO_DIF
1276  *
1277  * This is usually used when the HBA is instructed to generate
1278  * DIFs and insert them into data stream (or strip DIF from
1279  * incoming data stream)
1280  *
1281  * The buffer list consists of just one protection group described
1282  * below:
1283  *                                +-------------------------+
1284  *   start of prot group  -->     |          PDE_5          |
1285  *                                +-------------------------+
1286  *                                |          PDE_6          |
1287  *                                +-------------------------+
1288  *                                |         Data BDE        |
1289  *                                +-------------------------+
1290  *                                |more Data BDE's ... (opt)|
1291  *                                +-------------------------+
1292  *
1293  * @sc: pointer to scsi command we're working on
1294  * @bpl: pointer to buffer list for protection groups
1295  * @datacnt: number of segments of data that have been dma mapped
1296  *
1297  * Note: Data s/g buffers have been dma mapped
1298  */
1299 static int
1300 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1301                 struct ulp_bde64 *bpl, int datasegcnt)
1302 {
1303         struct scatterlist *sgde = NULL; /* s/g data entry */
1304         struct lpfc_pde5 *pde5 = NULL;
1305         struct lpfc_pde6 *pde6 = NULL;
1306         dma_addr_t physaddr;
1307         int i = 0, num_bde = 0, status;
1308         int datadir = sc->sc_data_direction;
1309         unsigned blksize;
1310         uint32_t reftag;
1311         uint16_t apptagmask, apptagval;
1312         uint8_t txop, rxop;
1313
1314         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1315         if (status)
1316                 goto out;
1317
1318         /* extract some info from the scsi command for pde*/
1319         blksize = lpfc_cmd_blksize(sc);
1320         lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1321
1322         /* setup PDE5 with what we have */
1323         pde5 = (struct lpfc_pde5 *) bpl;
1324         memset(pde5, 0, sizeof(struct lpfc_pde5));
1325         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1326         pde5->reftag = reftag;
1327
1328         /* Endianness conversion if necessary for PDE5 */
1329         pde5->word0 = cpu_to_le32(pde5->word0);
1330         pde5->reftag = cpu_to_le32(pde5->reftag);
1331
1332         /* advance bpl and increment bde count */
1333         num_bde++;
1334         bpl++;
1335         pde6 = (struct lpfc_pde6 *) bpl;
1336
1337         /* setup PDE6 with the rest of the info */
1338         memset(pde6, 0, sizeof(struct lpfc_pde6));
1339         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1340         bf_set(pde6_optx, pde6, txop);
1341         bf_set(pde6_oprx, pde6, rxop);
1342         if (datadir == DMA_FROM_DEVICE) {
1343                 bf_set(pde6_ce, pde6, 1);
1344                 bf_set(pde6_re, pde6, 1);
1345                 bf_set(pde6_ae, pde6, 1);
1346         }
1347         bf_set(pde6_ai, pde6, 1);
1348         bf_set(pde6_apptagval, pde6, apptagval);
1349
1350         /* Endianness conversion if necessary for PDE6 */
1351         pde6->word0 = cpu_to_le32(pde6->word0);
1352         pde6->word1 = cpu_to_le32(pde6->word1);
1353         pde6->word2 = cpu_to_le32(pde6->word2);
1354
1355         /* advance bpl and increment bde count */
1356         num_bde++;
1357         bpl++;
1358
1359         /* assumption: caller has already run dma_map_sg on command data */
1360         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1361                 physaddr = sg_dma_address(sgde);
1362                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1363                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1364                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1365                 if (datadir == DMA_TO_DEVICE)
1366                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1367                 else
1368                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1369                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1370                 bpl++;
1371                 num_bde++;
1372         }
1373
1374 out:
1375         return num_bde;
1376 }
1377
1378 /*
1379  * This function sets up buffer list for protection groups of
1380  * type LPFC_PG_TYPE_DIF_BUF
1381  *
1382  * This is usually used when DIFs are in their own buffers,
1383  * separate from the data. The HBA can then by instructed
1384  * to place the DIFs in the outgoing stream.  For read operations,
1385  * The HBA could extract the DIFs and place it in DIF buffers.
1386  *
1387  * The buffer list for this type consists of one or more of the
1388  * protection groups described below:
1389  *                                    +-------------------------+
1390  *   start of first prot group  -->   |          PDE_5          |
1391  *                                    +-------------------------+
1392  *                                    |          PDE_6          |
1393  *                                    +-------------------------+
1394  *                                    |      PDE_7 (Prot BDE)   |
1395  *                                    +-------------------------+
1396  *                                    |        Data BDE         |
1397  *                                    +-------------------------+
1398  *                                    |more Data BDE's ... (opt)|
1399  *                                    +-------------------------+
1400  *   start of new  prot group  -->    |          PDE_5          |
1401  *                                    +-------------------------+
1402  *                                    |          ...            |
1403  *                                    +-------------------------+
1404  *
1405  * @sc: pointer to scsi command we're working on
1406  * @bpl: pointer to buffer list for protection groups
1407  * @datacnt: number of segments of data that have been dma mapped
1408  * @protcnt: number of segment of protection data that have been dma mapped
1409  *
1410  * Note: It is assumed that both data and protection s/g buffers have been
1411  *       mapped for DMA
1412  */
1413 static int
1414 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1415                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1416 {
1417         struct scatterlist *sgde = NULL; /* s/g data entry */
1418         struct scatterlist *sgpe = NULL; /* s/g prot entry */
1419         struct lpfc_pde5 *pde5 = NULL;
1420         struct lpfc_pde6 *pde6 = NULL;
1421         struct ulp_bde64 *prot_bde = NULL;
1422         dma_addr_t dataphysaddr, protphysaddr;
1423         unsigned short curr_data = 0, curr_prot = 0;
1424         unsigned int split_offset, protgroup_len;
1425         unsigned int protgrp_blks, protgrp_bytes;
1426         unsigned int remainder, subtotal;
1427         int status;
1428         int datadir = sc->sc_data_direction;
1429         unsigned char pgdone = 0, alldone = 0;
1430         unsigned blksize;
1431         uint32_t reftag;
1432         uint16_t apptagmask, apptagval;
1433         uint8_t txop, rxop;
1434         int num_bde = 0;
1435
1436         sgpe = scsi_prot_sglist(sc);
1437         sgde = scsi_sglist(sc);
1438
1439         if (!sgpe || !sgde) {
1440                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1441                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1442                                 sgpe, sgde);
1443                 return 0;
1444         }
1445
1446         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1447         if (status)
1448                 goto out;
1449
1450         /* extract some info from the scsi command */
1451         blksize = lpfc_cmd_blksize(sc);
1452         lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1453
1454         split_offset = 0;
1455         do {
1456                 /* setup PDE5 with what we have */
1457                 pde5 = (struct lpfc_pde5 *) bpl;
1458                 memset(pde5, 0, sizeof(struct lpfc_pde5));
1459                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1460                 pde5->reftag = reftag;
1461
1462                 /* Endianness conversion if necessary for PDE5 */
1463                 pde5->word0 = cpu_to_le32(pde5->word0);
1464                 pde5->reftag = cpu_to_le32(pde5->reftag);
1465
1466                 /* advance bpl and increment bde count */
1467                 num_bde++;
1468                 bpl++;
1469                 pde6 = (struct lpfc_pde6 *) bpl;
1470
1471                 /* setup PDE6 with the rest of the info */
1472                 memset(pde6, 0, sizeof(struct lpfc_pde6));
1473                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1474                 bf_set(pde6_optx, pde6, txop);
1475                 bf_set(pde6_oprx, pde6, rxop);
1476                 bf_set(pde6_ce, pde6, 1);
1477                 bf_set(pde6_re, pde6, 1);
1478                 bf_set(pde6_ae, pde6, 1);
1479                 bf_set(pde6_ai, pde6, 1);
1480                 bf_set(pde6_apptagval, pde6, apptagval);
1481
1482                 /* Endianness conversion if necessary for PDE6 */
1483                 pde6->word0 = cpu_to_le32(pde6->word0);
1484                 pde6->word1 = cpu_to_le32(pde6->word1);
1485                 pde6->word2 = cpu_to_le32(pde6->word2);
1486
1487                 /* advance bpl and increment bde count */
1488                 num_bde++;
1489                 bpl++;
1490
1491                 /* setup the first BDE that points to protection buffer */
1492                 prot_bde = (struct ulp_bde64 *) bpl;
1493                 protphysaddr = sg_dma_address(sgpe);
1494                 prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1495                 prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1496                 protgroup_len = sg_dma_len(sgpe);
1497
1498                 /* must be integer multiple of the DIF block length */
1499                 BUG_ON(protgroup_len % 8);
1500
1501                 protgrp_blks = protgroup_len / 8;
1502                 protgrp_bytes = protgrp_blks * blksize;
1503
1504                 prot_bde->tus.f.bdeSize = protgroup_len;
1505                 prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
1506                 prot_bde->tus.w = le32_to_cpu(bpl->tus.w);
1507
1508                 curr_prot++;
1509                 num_bde++;
1510
1511                 /* setup BDE's for data blocks associated with DIF data */
1512                 pgdone = 0;
1513                 subtotal = 0; /* total bytes processed for current prot grp */
1514                 while (!pgdone) {
1515                         if (!sgde) {
1516                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1517                                         "9065 BLKGRD:%s Invalid data segment\n",
1518                                                 __func__);
1519                                 return 0;
1520                         }
1521                         bpl++;
1522                         dataphysaddr = sg_dma_address(sgde) + split_offset;
1523                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1524                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1525
1526                         remainder = sg_dma_len(sgde) - split_offset;
1527
1528                         if ((subtotal + remainder) <= protgrp_bytes) {
1529                                 /* we can use this whole buffer */
1530                                 bpl->tus.f.bdeSize = remainder;
1531                                 split_offset = 0;
1532
1533                                 if ((subtotal + remainder) == protgrp_bytes)
1534                                         pgdone = 1;
1535                         } else {
1536                                 /* must split this buffer with next prot grp */
1537                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1538                                 split_offset += bpl->tus.f.bdeSize;
1539                         }
1540
1541                         subtotal += bpl->tus.f.bdeSize;
1542
1543                         if (datadir == DMA_TO_DEVICE)
1544                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1545                         else
1546                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1547                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
1548
1549                         num_bde++;
1550                         curr_data++;
1551
1552                         if (split_offset)
1553                                 break;
1554
1555                         /* Move to the next s/g segment if possible */
1556                         sgde = sg_next(sgde);
1557
1558                 }
1559
1560                 /* are we done ? */
1561                 if (curr_prot == protcnt) {
1562                         alldone = 1;
1563                 } else if (curr_prot < protcnt) {
1564                         /* advance to next prot buffer */
1565                         sgpe = sg_next(sgpe);
1566                         bpl++;
1567
1568                         /* update the reference tag */
1569                         reftag += protgrp_blks;
1570                 } else {
1571                         /* if we're here, we have a bug */
1572                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1573                                 "9054 BLKGRD: bug in %s\n", __func__);
1574                 }
1575
1576         } while (!alldone);
1577
1578 out:
1579
1580         return num_bde;
1581 }
1582 /*
1583  * Given a SCSI command that supports DIF, determine composition of protection
1584  * groups involved in setting up buffer lists
1585  *
1586  * Returns:
1587  *                            for DIF (for both read and write)
1588  * */
1589 static int
1590 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1591 {
1592         int ret = LPFC_PG_TYPE_INVALID;
1593         unsigned char op = scsi_get_prot_op(sc);
1594
1595         switch (op) {
1596         case SCSI_PROT_READ_STRIP:
1597         case SCSI_PROT_WRITE_INSERT:
1598                 ret = LPFC_PG_TYPE_NO_DIF;
1599                 break;
1600         case SCSI_PROT_READ_INSERT:
1601         case SCSI_PROT_WRITE_STRIP:
1602         case SCSI_PROT_READ_PASS:
1603         case SCSI_PROT_WRITE_PASS:
1604                 ret = LPFC_PG_TYPE_DIF_BUF;
1605                 break;
1606         default:
1607                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1608                                 "9021 Unsupported protection op:%d\n", op);
1609                 break;
1610         }
1611
1612         return ret;
1613 }
1614
1615 /*
1616  * This is the protection/DIF aware version of
1617  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1618  * two functions eventually, but for now, it's here
1619  */
1620 static int
1621 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1622                 struct lpfc_scsi_buf *lpfc_cmd)
1623 {
1624         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1625         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1626         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1627         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1628         uint32_t num_bde = 0;
1629         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1630         int prot_group_type = 0;
1631         int diflen, fcpdl;
1632         unsigned blksize;
1633
1634         /*
1635          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1636          *  fcp_rsp regions to the first data bde entry
1637          */
1638         bpl += 2;
1639         if (scsi_sg_count(scsi_cmnd)) {
1640                 /*
1641                  * The driver stores the segment count returned from pci_map_sg
1642                  * because this a count of dma-mappings used to map the use_sg
1643                  * pages.  They are not guaranteed to be the same for those
1644                  * architectures that implement an IOMMU.
1645                  */
1646                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1647                                         scsi_sglist(scsi_cmnd),
1648                                         scsi_sg_count(scsi_cmnd), datadir);
1649                 if (unlikely(!datasegcnt))
1650                         return 1;
1651
1652                 lpfc_cmd->seg_cnt = datasegcnt;
1653                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1654                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1655                                         "9067 BLKGRD: %s: Too many sg segments"
1656                                         " from dma_map_sg.  Config %d, seg_cnt"
1657                                         " %d\n",
1658                                         __func__, phba->cfg_sg_seg_cnt,
1659                                         lpfc_cmd->seg_cnt);
1660                         scsi_dma_unmap(scsi_cmnd);
1661                         return 1;
1662                 }
1663
1664                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1665
1666                 switch (prot_group_type) {
1667                 case LPFC_PG_TYPE_NO_DIF:
1668                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1669                                         datasegcnt);
1670                         /* we should have 2 or more entries in buffer list */
1671                         if (num_bde < 2)
1672                                 goto err;
1673                         break;
1674                 case LPFC_PG_TYPE_DIF_BUF:{
1675                         /*
1676                          * This type indicates that protection buffers are
1677                          * passed to the driver, so that needs to be prepared
1678                          * for DMA
1679                          */
1680                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
1681                                         scsi_prot_sglist(scsi_cmnd),
1682                                         scsi_prot_sg_count(scsi_cmnd), datadir);
1683                         if (unlikely(!protsegcnt)) {
1684                                 scsi_dma_unmap(scsi_cmnd);
1685                                 return 1;
1686                         }
1687
1688                         lpfc_cmd->prot_seg_cnt = protsegcnt;
1689                         if (lpfc_cmd->prot_seg_cnt
1690                             > phba->cfg_prot_sg_seg_cnt) {
1691                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1692                                         "9068 BLKGRD: %s: Too many prot sg "
1693                                         "segments from dma_map_sg.  Config %d,"
1694                                                 "prot_seg_cnt %d\n", __func__,
1695                                                 phba->cfg_prot_sg_seg_cnt,
1696                                                 lpfc_cmd->prot_seg_cnt);
1697                                 dma_unmap_sg(&phba->pcidev->dev,
1698                                              scsi_prot_sglist(scsi_cmnd),
1699                                              scsi_prot_sg_count(scsi_cmnd),
1700                                              datadir);
1701                                 scsi_dma_unmap(scsi_cmnd);
1702                                 return 1;
1703                         }
1704
1705                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1706                                         datasegcnt, protsegcnt);
1707                         /* we should have 3 or more entries in buffer list */
1708                         if (num_bde < 3)
1709                                 goto err;
1710                         break;
1711                 }
1712                 case LPFC_PG_TYPE_INVALID:
1713                 default:
1714                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1715                                         "9022 Unexpected protection group %i\n",
1716                                         prot_group_type);
1717                         return 1;
1718                 }
1719         }
1720
1721         /*
1722          * Finish initializing those IOCB fields that are dependent on the
1723          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
1724          * reinitialized since all iocb memory resources are used many times
1725          * for transmit, receive, and continuation bpl's.
1726          */
1727         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1728         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1729         iocb_cmd->ulpBdeCount = 1;
1730         iocb_cmd->ulpLe = 1;
1731
1732         fcpdl = scsi_bufflen(scsi_cmnd);
1733
1734         if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1735                 /*
1736                  * We are in DIF Type 1 mode
1737                  * Every data block has a 8 byte DIF (trailer)
1738                  * attached to it.  Must ajust FCP data length
1739                  */
1740                 blksize = lpfc_cmd_blksize(scsi_cmnd);
1741                 diflen = (fcpdl / blksize) * 8;
1742                 fcpdl += diflen;
1743         }
1744         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1745
1746         /*
1747          * Due to difference in data length between DIF/non-DIF paths,
1748          * we need to set word 4 of IOCB here
1749          */
1750         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1751
1752         return 0;
1753 err:
1754         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1755                         "9023 Could not setup all needed BDE's"
1756                         "prot_group_type=%d, num_bde=%d\n",
1757                         prot_group_type, num_bde);
1758         return 1;
1759 }
1760
1761 /*
1762  * This function checks for BlockGuard errors detected by
1763  * the HBA.  In case of errors, the ASC/ASCQ fields in the
1764  * sense buffer will be set accordingly, paired with
1765  * ILLEGAL_REQUEST to signal to the kernel that the HBA
1766  * detected corruption.
1767  *
1768  * Returns:
1769  *  0 - No error found
1770  *  1 - BlockGuard error found
1771  * -1 - Internal error (bad profile, ...etc)
1772  */
1773 static int
1774 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1775                         struct lpfc_iocbq *pIocbOut)
1776 {
1777         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1778         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1779         int ret = 0;
1780         uint32_t bghm = bgf->bghm;
1781         uint32_t bgstat = bgf->bgstat;
1782         uint64_t failing_sector = 0;
1783
1784         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1785                         " 0x%x lba 0x%llx blk cnt 0x%x "
1786                         "bgstat=0x%x bghm=0x%x\n",
1787                         cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1788                         blk_rq_sectors(cmd->request), bgstat, bghm);
1789
1790         spin_lock(&_dump_buf_lock);
1791         if (!_dump_buf_done) {
1792                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
1793                         " Data for %u blocks to debugfs\n",
1794                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1795                 lpfc_debug_save_data(phba, cmd);
1796
1797                 /* If we have a prot sgl, save the DIF buffer */
1798                 if (lpfc_prot_group_type(phba, cmd) ==
1799                                 LPFC_PG_TYPE_DIF_BUF) {
1800                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1801                                 "Saving DIF for %u blocks to debugfs\n",
1802                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1803                         lpfc_debug_save_dif(phba, cmd);
1804                 }
1805
1806                 _dump_buf_done = 1;
1807         }
1808         spin_unlock(&_dump_buf_lock);
1809
1810         if (lpfc_bgs_get_invalid_prof(bgstat)) {
1811                 cmd->result = ScsiResult(DID_ERROR, 0);
1812                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1813                         " BlockGuard profile. bgstat:0x%x\n",
1814                         bgstat);
1815                 ret = (-1);
1816                 goto out;
1817         }
1818
1819         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1820                 cmd->result = ScsiResult(DID_ERROR, 0);
1821                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1822                                 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1823                                 bgstat);
1824                 ret = (-1);
1825                 goto out;
1826         }
1827
1828         if (lpfc_bgs_get_guard_err(bgstat)) {
1829                 ret = 1;
1830
1831                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1832                                 0x10, 0x1);
1833                 cmd->result = DRIVER_SENSE << 24
1834                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1835                 phba->bg_guard_err_cnt++;
1836                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1837                         "9055 BLKGRD: guard_tag error\n");
1838         }
1839
1840         if (lpfc_bgs_get_reftag_err(bgstat)) {
1841                 ret = 1;
1842
1843                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1844                                 0x10, 0x3);
1845                 cmd->result = DRIVER_SENSE << 24
1846                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1847
1848                 phba->bg_reftag_err_cnt++;
1849                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1850                         "9056 BLKGRD: ref_tag error\n");
1851         }
1852
1853         if (lpfc_bgs_get_apptag_err(bgstat)) {
1854                 ret = 1;
1855
1856                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1857                                 0x10, 0x2);
1858                 cmd->result = DRIVER_SENSE << 24
1859                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1860
1861                 phba->bg_apptag_err_cnt++;
1862                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1863                         "9061 BLKGRD: app_tag error\n");
1864         }
1865
1866         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1867                 /*
1868                  * setup sense data descriptor 0 per SPC-4 as an information
1869                  * field, and put the failing LBA in it
1870                  */
1871                 cmd->sense_buffer[8] = 0;     /* Information */
1872                 cmd->sense_buffer[9] = 0xa;   /* Add. length */
1873                 bghm /= cmd->device->sector_size;
1874
1875                 failing_sector = scsi_get_lba(cmd);
1876                 failing_sector += bghm;
1877
1878                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
1879         }
1880
1881         if (!ret) {
1882                 /* No error was reported - problem in FW? */
1883                 cmd->result = ScsiResult(DID_ERROR, 0);
1884                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1885                         "9057 BLKGRD: no errors reported!\n");
1886         }
1887
1888 out:
1889         return ret;
1890 }
1891
1892 /**
1893  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
1894  * @phba: The Hba for which this call is being executed.
1895  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1896  *
1897  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1898  * field of @lpfc_cmd for device with SLI-4 interface spec.
1899  *
1900  * Return codes:
1901  *      1 - Error
1902  *      0 - Success
1903  **/
1904 static int
1905 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1906 {
1907         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1908         struct scatterlist *sgel = NULL;
1909         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1910         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
1911         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1912         dma_addr_t physaddr;
1913         uint32_t num_bde = 0;
1914         uint32_t dma_len;
1915         uint32_t dma_offset = 0;
1916         int nseg;
1917
1918         /*
1919          * There are three possibilities here - use scatter-gather segment, use
1920          * the single mapping, or neither.  Start the lpfc command prep by
1921          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1922          * data bde entry.
1923          */
1924         if (scsi_sg_count(scsi_cmnd)) {
1925                 /*
1926                  * The driver stores the segment count returned from pci_map_sg
1927                  * because this a count of dma-mappings used to map the use_sg
1928                  * pages.  They are not guaranteed to be the same for those
1929                  * architectures that implement an IOMMU.
1930                  */
1931
1932                 nseg = scsi_dma_map(scsi_cmnd);
1933                 if (unlikely(!nseg))
1934                         return 1;
1935                 sgl += 1;
1936                 /* clear the last flag in the fcp_rsp map entry */
1937                 sgl->word2 = le32_to_cpu(sgl->word2);
1938                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1939                 sgl->word2 = cpu_to_le32(sgl->word2);
1940                 sgl += 1;
1941
1942                 lpfc_cmd->seg_cnt = nseg;
1943                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1944                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
1945                                 " %s: Too many sg segments from "
1946                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
1947                                 __func__, phba->cfg_sg_seg_cnt,
1948                                lpfc_cmd->seg_cnt);
1949                         scsi_dma_unmap(scsi_cmnd);
1950                         return 1;
1951                 }
1952
1953                 /*
1954                  * The driver established a maximum scatter-gather segment count
1955                  * during probe that limits the number of sg elements in any
1956                  * single scsi command.  Just run through the seg_cnt and format
1957                  * the sge's.
1958                  * When using SLI-3 the driver will try to fit all the BDEs into
1959                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1960                  * does for SLI-2 mode.
1961                  */
1962                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1963                         physaddr = sg_dma_address(sgel);
1964                         dma_len = sg_dma_len(sgel);
1965                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1966                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1967                         if ((num_bde + 1) == nseg)
1968                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1969                         else
1970                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1971                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1972                         sgl->word2 = cpu_to_le32(sgl->word2);
1973                         sgl->sge_len = cpu_to_le32(dma_len);
1974                         dma_offset += dma_len;
1975                         sgl++;
1976                 }
1977         } else {
1978                 sgl += 1;
1979                 /* clear the last flag in the fcp_rsp map entry */
1980                 sgl->word2 = le32_to_cpu(sgl->word2);
1981                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1982                 sgl->word2 = cpu_to_le32(sgl->word2);
1983         }
1984
1985         /*
1986          * Finish initializing those IOCB fields that are dependent on the
1987          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1988          * explicitly reinitialized.
1989          * all iocb memory resources are reused.
1990          */
1991         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1992
1993         /*
1994          * Due to difference in data length between DIF/non-DIF paths,
1995          * we need to set word 4 of IOCB here
1996          */
1997         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1998         return 0;
1999 }
2000
2001 /**
2002  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2003  * @phba: The Hba for which this call is being executed.
2004  * @lpfc_cmd: The scsi buffer which is going to be mapped.
2005  *
2006  * This routine wraps the actual DMA mapping function pointer from the
2007  * lpfc_hba struct.
2008  *
2009  * Return codes:
2010  *      1 - Error
2011  *      0 - Success
2012  **/
2013 static inline int
2014 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2015 {
2016         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2017 }
2018
2019 /**
2020  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2021  * @phba: Pointer to hba context object.
2022  * @vport: Pointer to vport object.
2023  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2024  * @rsp_iocb: Pointer to response iocb object which reported error.
2025  *
2026  * This function posts an event when there is a SCSI command reporting
2027  * error from the scsi device.
2028  **/
2029 static void
2030 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2031                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2032         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2033         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2034         uint32_t resp_info = fcprsp->rspStatus2;
2035         uint32_t scsi_status = fcprsp->rspStatus3;
2036         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2037         struct lpfc_fast_path_event *fast_path_evt = NULL;
2038         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2039         unsigned long flags;
2040
2041         /* If there is queuefull or busy condition send a scsi event */
2042         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2043                 (cmnd->result == SAM_STAT_BUSY)) {
2044                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2045                 if (!fast_path_evt)
2046                         return;
2047                 fast_path_evt->un.scsi_evt.event_type =
2048                         FC_REG_SCSI_EVENT;
2049                 fast_path_evt->un.scsi_evt.subcategory =
2050                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2051                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2052                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2053                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2054                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2055                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2056                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2057         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2058                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2059                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2060                 if (!fast_path_evt)
2061                         return;
2062                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2063                         FC_REG_SCSI_EVENT;
2064                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2065                         LPFC_EVENT_CHECK_COND;
2066                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2067                         cmnd->device->lun;
2068                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2069                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2070                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2071                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2072                 fast_path_evt->un.check_cond_evt.sense_key =
2073                         cmnd->sense_buffer[2] & 0xf;
2074                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2075                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2076         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2077                      fcpi_parm &&
2078                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2079                         ((scsi_status == SAM_STAT_GOOD) &&
2080                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2081                 /*
2082                  * If status is good or resid does not match with fcp_param and
2083                  * there is valid fcpi_parm, then there is a read_check error
2084                  */
2085                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2086                 if (!fast_path_evt)
2087                         return;
2088                 fast_path_evt->un.read_check_error.header.event_type =
2089                         FC_REG_FABRIC_EVENT;
2090                 fast_path_evt->un.read_check_error.header.subcategory =
2091                         LPFC_EVENT_FCPRDCHKERR;
2092                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2093                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2094                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2095                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2096                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2097                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2098                 fast_path_evt->un.read_check_error.fcpiparam =
2099                         fcpi_parm;
2100         } else
2101                 return;
2102
2103         fast_path_evt->vport = vport;
2104         spin_lock_irqsave(&phba->hbalock, flags);
2105         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2106         spin_unlock_irqrestore(&phba->hbalock, flags);
2107         lpfc_worker_wake_up(phba);
2108         return;
2109 }
2110
2111 /**
2112  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2113  * @phba: The HBA for which this call is being executed.
2114  * @psb: The scsi buffer which is going to be un-mapped.
2115  *
2116  * This routine does DMA un-mapping of scatter gather list of scsi command
2117  * field of @lpfc_cmd for device with SLI-3 interface spec.
2118  **/
2119 static void
2120 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2121 {
2122         /*
2123          * There are only two special cases to consider.  (1) the scsi command
2124          * requested scatter-gather usage or (2) the scsi command allocated
2125          * a request buffer, but did not request use_sg.  There is a third
2126          * case, but it does not require resource deallocation.
2127          */
2128         if (psb->seg_cnt > 0)
2129                 scsi_dma_unmap(psb->pCmd);
2130         if (psb->prot_seg_cnt > 0)
2131                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2132                                 scsi_prot_sg_count(psb->pCmd),
2133                                 psb->pCmd->sc_data_direction);
2134 }
2135
2136 /**
2137  * lpfc_handler_fcp_err - FCP response handler
2138  * @vport: The virtual port for which this call is being executed.
2139  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2140  * @rsp_iocb: The response IOCB which contains FCP error.
2141  *
2142  * This routine is called to process response IOCB with status field
2143  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2144  * based upon SCSI and FCP error.
2145  **/
2146 static void
2147 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2148                     struct lpfc_iocbq *rsp_iocb)
2149 {
2150         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2151         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2152         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2153         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2154         uint32_t resp_info = fcprsp->rspStatus2;
2155         uint32_t scsi_status = fcprsp->rspStatus3;
2156         uint32_t *lp;
2157         uint32_t host_status = DID_OK;
2158         uint32_t rsplen = 0;
2159         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2160
2161
2162         /*
2163          *  If this is a task management command, there is no
2164          *  scsi packet associated with this lpfc_cmd.  The driver
2165          *  consumes it.
2166          */
2167         if (fcpcmd->fcpCntl2) {
2168                 scsi_status = 0;
2169                 goto out;
2170         }
2171
2172         if (resp_info & RSP_LEN_VALID) {
2173                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2174                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2175                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2176                                  "2719 Invalid response length: "
2177                                  "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2178                                  cmnd->device->id,
2179                                  cmnd->device->lun, cmnd->cmnd[0],
2180                                  rsplen);
2181                         host_status = DID_ERROR;
2182                         goto out;
2183                 }
2184                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2185                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2186                                  "2757 Protocol failure detected during "
2187                                  "processing of FCP I/O op: "
2188                                  "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2189                                  cmnd->device->id,
2190                                  cmnd->device->lun, cmnd->cmnd[0],
2191                                  fcprsp->rspInfo3);
2192                         host_status = DID_ERROR;
2193                         goto out;
2194                 }
2195         }
2196
2197         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2198                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2199                 if (snslen > SCSI_SENSE_BUFFERSIZE)
2200                         snslen = SCSI_SENSE_BUFFERSIZE;
2201
2202                 if (resp_info & RSP_LEN_VALID)
2203                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
2204                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2205         }
2206         lp = (uint32_t *)cmnd->sense_buffer;
2207
2208         if (!scsi_status && (resp_info & RESID_UNDER))
2209                 logit = LOG_FCP;
2210
2211         lpfc_printf_vlog(vport, KERN_WARNING, logit,
2212                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
2213                          "Data: x%x x%x x%x x%x x%x\n",
2214                          cmnd->cmnd[0], scsi_status,
2215                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2216                          be32_to_cpu(fcprsp->rspResId),
2217                          be32_to_cpu(fcprsp->rspSnsLen),
2218                          be32_to_cpu(fcprsp->rspRspLen),
2219                          fcprsp->rspInfo3);
2220
2221         scsi_set_resid(cmnd, 0);
2222         if (resp_info & RESID_UNDER) {
2223                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2224
2225                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2226                                  "9025 FCP Read Underrun, expected %d, "
2227                                  "residual %d Data: x%x x%x x%x\n",
2228                                  be32_to_cpu(fcpcmd->fcpDl),
2229                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2230                                  cmnd->underflow);
2231
2232                 /*
2233                  * If there is an under run check if under run reported by
2234                  * storage array is same as the under run reported by HBA.
2235                  * If this is not same, there is a dropped frame.
2236                  */
2237                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2238                         fcpi_parm &&
2239                         (scsi_get_resid(cmnd) != fcpi_parm)) {
2240                         lpfc_printf_vlog(vport, KERN_WARNING,
2241                                          LOG_FCP | LOG_FCP_ERROR,
2242                                          "9026 FCP Read Check Error "
2243                                          "and Underrun Data: x%x x%x x%x x%x\n",
2244                                          be32_to_cpu(fcpcmd->fcpDl),
2245                                          scsi_get_resid(cmnd), fcpi_parm,
2246                                          cmnd->cmnd[0]);
2247                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2248                         host_status = DID_ERROR;
2249                 }
2250                 /*
2251                  * The cmnd->underflow is the minimum number of bytes that must
2252                  * be transfered for this command.  Provided a sense condition
2253                  * is not present, make sure the actual amount transferred is at
2254                  * least the underflow value or fail.
2255                  */
2256                 if (!(resp_info & SNS_LEN_VALID) &&
2257                     (scsi_status == SAM_STAT_GOOD) &&
2258                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2259                      < cmnd->underflow)) {
2260                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2261                                          "9027 FCP command x%x residual "
2262                                          "underrun converted to error "
2263                                          "Data: x%x x%x x%x\n",
2264                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
2265                                          scsi_get_resid(cmnd), cmnd->underflow);
2266                         host_status = DID_ERROR;
2267                 }
2268         } else if (resp_info & RESID_OVER) {
2269                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2270                                  "9028 FCP command x%x residual overrun error. "
2271                                  "Data: x%x x%x\n", cmnd->cmnd[0],
2272                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2273                 host_status = DID_ERROR;
2274
2275         /*
2276          * Check SLI validation that all the transfer was actually done
2277          * (fcpi_parm should be zero). Apply check only to reads.
2278          */
2279         } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
2280                         (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2281                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2282                                  "9029 FCP Read Check Error Data: "
2283                                  "x%x x%x x%x x%x\n",
2284                                  be32_to_cpu(fcpcmd->fcpDl),
2285                                  be32_to_cpu(fcprsp->rspResId),
2286                                  fcpi_parm, cmnd->cmnd[0]);
2287                 host_status = DID_ERROR;
2288                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2289         }
2290
2291  out:
2292         cmnd->result = ScsiResult(host_status, scsi_status);
2293         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2294 }
2295
2296 /**
2297  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2298  * @phba: The Hba for which this call is being executed.
2299  * @pIocbIn: The command IOCBQ for the scsi cmnd.
2300  * @pIocbOut: The response IOCBQ for the scsi cmnd.
2301  *
2302  * This routine assigns scsi command result by looking into response IOCB
2303  * status field appropriately. This routine handles QUEUE FULL condition as
2304  * well by ramping down device queue depth.
2305  **/
2306 static void
2307 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2308                         struct lpfc_iocbq *pIocbOut)
2309 {
2310         struct lpfc_scsi_buf *lpfc_cmd =
2311                 (struct lpfc_scsi_buf *) pIocbIn->context1;
2312         struct lpfc_vport      *vport = pIocbIn->vport;
2313         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2314         struct lpfc_nodelist *pnode = rdata->pnode;
2315         struct scsi_cmnd *cmd;
2316         int result;
2317         struct scsi_device *tmp_sdev;
2318         int depth;
2319         unsigned long flags;
2320         struct lpfc_fast_path_event *fast_path_evt;
2321         struct Scsi_Host *shost;
2322         uint32_t queue_depth, scsi_id;
2323
2324         /* Sanity check on return of outstanding command */
2325         if (!(lpfc_cmd->pCmd))
2326                 return;
2327         cmd = lpfc_cmd->pCmd;
2328         shost = cmd->device->host;
2329
2330         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2331         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2332         /* pick up SLI4 exhange busy status from HBA */
2333         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2334
2335         if (pnode && NLP_CHK_NODE_ACT(pnode))
2336                 atomic_dec(&pnode->cmd_pending);
2337
2338         if (lpfc_cmd->status) {
2339                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2340                     (lpfc_cmd->result & IOERR_DRVR_MASK))
2341                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2342                 else if (lpfc_cmd->status >= IOSTAT_CNT)
2343                         lpfc_cmd->status = IOSTAT_DEFAULT;
2344
2345                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2346                                  "9030 FCP cmd x%x failed <%d/%d> "
2347                                  "status: x%x result: x%x Data: x%x x%x\n",
2348                                  cmd->cmnd[0],
2349                                  cmd->device ? cmd->device->id : 0xffff,
2350                                  cmd->device ? cmd->device->lun : 0xffff,
2351                                  lpfc_cmd->status, lpfc_cmd->result,
2352                                  pIocbOut->iocb.ulpContext,
2353                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2354
2355                 switch (lpfc_cmd->status) {
2356                 case IOSTAT_FCP_RSP_ERROR:
2357                         /* Call FCP RSP handler to determine result */
2358                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2359                         break;
2360                 case IOSTAT_NPORT_BSY:
2361                 case IOSTAT_FABRIC_BSY:
2362                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2363                         fast_path_evt = lpfc_alloc_fast_evt(phba);
2364                         if (!fast_path_evt)
2365                                 break;
2366                         fast_path_evt->un.fabric_evt.event_type =
2367                                 FC_REG_FABRIC_EVENT;
2368                         fast_path_evt->un.fabric_evt.subcategory =
2369                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2370                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2371                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2372                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2373                                         &pnode->nlp_portname,
2374                                         sizeof(struct lpfc_name));
2375                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2376                                         &pnode->nlp_nodename,
2377                                         sizeof(struct lpfc_name));
2378                         }
2379                         fast_path_evt->vport = vport;
2380                         fast_path_evt->work_evt.evt =
2381                                 LPFC_EVT_FASTPATH_MGMT_EVT;
2382                         spin_lock_irqsave(&phba->hbalock, flags);
2383                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
2384                                 &phba->work_list);
2385                         spin_unlock_irqrestore(&phba->hbalock, flags);
2386                         lpfc_worker_wake_up(phba);
2387                         break;
2388                 case IOSTAT_LOCAL_REJECT:
2389                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2390                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
2391                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2392                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2393                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
2394                                 break;
2395                         }
2396
2397                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2398                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2399                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2400                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2401                                         /*
2402                                          * This is a response for a BG enabled
2403                                          * cmd. Parse BG error
2404                                          */
2405                                         lpfc_parse_bg_err(phba, lpfc_cmd,
2406                                                         pIocbOut);
2407                                         break;
2408                                 } else {
2409                                         lpfc_printf_vlog(vport, KERN_WARNING,
2410                                                         LOG_BG,
2411                                                         "9031 non-zero BGSTAT "
2412                                                         "on unprotected cmd\n");
2413                                 }
2414                         }
2415
2416                 /* else: fall through */
2417                 default:
2418                         cmd->result = ScsiResult(DID_ERROR, 0);
2419                         break;
2420                 }
2421
2422                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2423                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2424                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2425                                                  SAM_STAT_BUSY);
2426         } else {
2427                 cmd->result = ScsiResult(DID_OK, 0);
2428         }
2429
2430         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2431                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2432
2433                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2434                                  "0710 Iodone <%d/%d> cmd %p, error "
2435                                  "x%x SNS x%x x%x Data: x%x x%x\n",
2436                                  cmd->device->id, cmd->device->lun, cmd,
2437                                  cmd->result, *lp, *(lp + 3), cmd->retries,
2438                                  scsi_get_resid(cmd));
2439         }
2440
2441         lpfc_update_stats(phba, lpfc_cmd);
2442         result = cmd->result;
2443         if (vport->cfg_max_scsicmpl_time &&
2444            time_after(jiffies, lpfc_cmd->start_time +
2445                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2446                 spin_lock_irqsave(shost->host_lock, flags);
2447                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2448                         if (pnode->cmd_qdepth >
2449                                 atomic_read(&pnode->cmd_pending) &&
2450                                 (atomic_read(&pnode->cmd_pending) >
2451                                 LPFC_MIN_TGT_QDEPTH) &&
2452                                 ((cmd->cmnd[0] == READ_10) ||
2453                                 (cmd->cmnd[0] == WRITE_10)))
2454                                 pnode->cmd_qdepth =
2455                                         atomic_read(&pnode->cmd_pending);
2456
2457                         pnode->last_change_time = jiffies;
2458                 }
2459                 spin_unlock_irqrestore(shost->host_lock, flags);
2460         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2461                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2462                    time_after(jiffies, pnode->last_change_time +
2463                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2464                         spin_lock_irqsave(shost->host_lock, flags);
2465                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2466                                 / 100;
2467                         depth = depth ? depth : 1;
2468                         pnode->cmd_qdepth += depth;
2469                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2470                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2471                         pnode->last_change_time = jiffies;
2472                         spin_unlock_irqrestore(shost->host_lock, flags);
2473                 }
2474         }
2475
2476         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2477
2478         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2479         queue_depth = cmd->device->queue_depth;
2480         scsi_id = cmd->device->id;
2481         cmd->scsi_done(cmd);
2482
2483         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2484                 /*
2485                  * If there is a thread waiting for command completion
2486                  * wake up the thread.
2487                  */
2488                 spin_lock_irqsave(shost->host_lock, flags);
2489                 lpfc_cmd->pCmd = NULL;
2490                 if (lpfc_cmd->waitq)
2491                         wake_up(lpfc_cmd->waitq);
2492                 spin_unlock_irqrestore(shost->host_lock, flags);
2493                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2494                 return;
2495         }
2496
2497         if (!result)
2498                 lpfc_rampup_queue_depth(vport, queue_depth);
2499
2500         /*
2501          * Check for queue full.  If the lun is reporting queue full, then
2502          * back off the lun queue depth to prevent target overloads.
2503          */
2504         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2505             NLP_CHK_NODE_ACT(pnode)) {
2506                 shost_for_each_device(tmp_sdev, shost) {
2507                         if (tmp_sdev->id != scsi_id)
2508                                 continue;
2509                         depth = scsi_track_queue_full(tmp_sdev,
2510                                                       tmp_sdev->queue_depth-1);
2511                         if (depth <= 0)
2512                                 continue;
2513                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2514                                          "0711 detected queue full - lun queue "
2515                                          "depth adjusted to %d.\n", depth);
2516                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
2517                                                                pnode,
2518                                                                tmp_sdev->lun,
2519                                                                depth+1, depth);
2520                 }
2521         }
2522
2523         /*
2524          * If there is a thread waiting for command completion
2525          * wake up the thread.
2526          */
2527         spin_lock_irqsave(shost->host_lock, flags);
2528         lpfc_cmd->pCmd = NULL;
2529         if (lpfc_cmd->waitq)
2530                 wake_up(lpfc_cmd->waitq);
2531         spin_unlock_irqrestore(shost->host_lock, flags);
2532
2533         lpfc_release_scsi_buf(phba, lpfc_cmd);
2534 }
2535
2536 /**
2537  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2538  * @data: A pointer to the immediate command data portion of the IOCB.
2539  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2540  *
2541  * The routine copies the entire FCP command from @fcp_cmnd to @data while
2542  * byte swapping the data to big endian format for transmission on the wire.
2543  **/
2544 static void
2545 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2546 {
2547         int i, j;
2548         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2549              i += sizeof(uint32_t), j++) {
2550                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2551         }
2552 }
2553
2554 /**
2555  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2556  * @vport: The virtual port for which this call is being executed.
2557  * @lpfc_cmd: The scsi command which needs to send.
2558  * @pnode: Pointer to lpfc_nodelist.
2559  *
2560  * This routine initializes fcp_cmnd and iocb data structure from scsi command
2561  * to transfer for device with SLI3 interface spec.
2562  **/
2563 static void
2564 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2565                     struct lpfc_nodelist *pnode)
2566 {
2567         struct lpfc_hba *phba = vport->phba;
2568         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2569         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2570         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2571         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2572         int datadir = scsi_cmnd->sc_data_direction;
2573         char tag[2];
2574
2575         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2576                 return;
2577
2578         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2579         /* clear task management bits */
2580         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2581
2582         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2583                         &lpfc_cmd->fcp_cmnd->fcp_lun);
2584
2585         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2586
2587         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2588                 switch (tag[0]) {
2589                 case HEAD_OF_QUEUE_TAG:
2590                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2591                         break;
2592                 case ORDERED_QUEUE_TAG:
2593                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
2594                         break;
2595                 default:
2596                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2597                         break;
2598                 }
2599         } else
2600                 fcp_cmnd->fcpCntl1 = 0;
2601
2602         /*
2603          * There are three possibilities here - use scatter-gather segment, use
2604          * the single mapping, or neither.  Start the lpfc command prep by
2605          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2606          * data bde entry.
2607          */
2608         if (scsi_sg_count(scsi_cmnd)) {
2609                 if (datadir == DMA_TO_DEVICE) {
2610                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2611                         if (phba->sli_rev < LPFC_SLI_REV4) {
2612                                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2613                                 iocb_cmd->ulpPU = 0;
2614                         } else
2615                                 iocb_cmd->ulpPU = PARM_READ_CHECK;
2616                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
2617                         phba->fc4OutputRequests++;
2618                 } else {
2619                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2620                         iocb_cmd->ulpPU = PARM_READ_CHECK;
2621                         fcp_cmnd->fcpCntl3 = READ_DATA;
2622                         phba->fc4InputRequests++;
2623                 }
2624         } else {
2625                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2626                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2627                 iocb_cmd->ulpPU = 0;
2628                 fcp_cmnd->fcpCntl3 = 0;
2629                 phba->fc4ControlRequests++;
2630         }
2631         if (phba->sli_rev == 3 &&
2632             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2633                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2634         /*
2635          * Finish initializing those IOCB fields that are independent
2636          * of the scsi_cmnd request_buffer
2637          */
2638         piocbq->iocb.ulpContext = pnode->nlp_rpi;
2639         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2640                 piocbq->iocb.ulpFCP2Rcvy = 1;
2641         else
2642                 piocbq->iocb.ulpFCP2Rcvy = 0;
2643
2644         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2645         piocbq->context1  = lpfc_cmd;
2646         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2647         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2648         piocbq->vport = vport;
2649 }
2650
2651 /**
2652  * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2653  * @vport: The virtual port for which this call is being executed.
2654  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2655  * @lun: Logical unit number.
2656  * @task_mgmt_cmd: SCSI task management command.
2657  *
2658  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2659  * for device with SLI-3 interface spec.
2660  *
2661  * Return codes:
2662  *   0 - Error
2663  *   1 - Success
2664  **/
2665 static int
2666 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2667                              struct lpfc_scsi_buf *lpfc_cmd,
2668                              unsigned int lun,
2669                              uint8_t task_mgmt_cmd)
2670 {
2671         struct lpfc_iocbq *piocbq;
2672         IOCB_t *piocb;
2673         struct fcp_cmnd *fcp_cmnd;
2674         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2675         struct lpfc_nodelist *ndlp = rdata->pnode;
2676
2677         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2678             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2679                 return 0;
2680
2681         piocbq = &(lpfc_cmd->cur_iocbq);
2682         piocbq->vport = vport;
2683
2684         piocb = &piocbq->iocb;
2685
2686         fcp_cmnd = lpfc_cmd->fcp_cmnd;
2687         /* Clear out any old data in the FCP command area */
2688         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2689         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2690         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2691         if (vport->phba->sli_rev == 3 &&
2692             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2693                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2694         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2695         piocb->ulpContext = ndlp->nlp_rpi;
2696         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2697                 piocb->ulpFCP2Rcvy = 1;
2698         }
2699         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2700
2701         /* ulpTimeout is only one byte */
2702         if (lpfc_cmd->timeout > 0xff) {
2703                 /*
2704                  * Do not timeout the command at the firmware level.
2705                  * The driver will provide the timeout mechanism.
2706                  */
2707                 piocb->ulpTimeout = 0;
2708         } else
2709                 piocb->ulpTimeout = lpfc_cmd->timeout;
2710
2711         if (vport->phba->sli_rev == LPFC_SLI_REV4)
2712                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2713
2714         return 1;
2715 }
2716
2717 /**
2718  * lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
2719  * @phba: The hba struct for which this call is being executed.
2720  * @dev_grp: The HBA PCI-Device group number.
2721  *
2722  * This routine sets up the SCSI interface API function jump table in @phba
2723  * struct.
2724  * Returns: 0 - success, -ENODEV - failure.
2725  **/
2726 int
2727 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2728 {
2729
2730         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2731         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2732         phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2733
2734         switch (dev_grp) {
2735         case LPFC_PCI_DEV_LP:
2736                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2737                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2738                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2739                 break;
2740         case LPFC_PCI_DEV_OC:
2741                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2742                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2743                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2744                 break;
2745         default:
2746                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2747                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
2748                                 dev_grp);
2749                 return -ENODEV;
2750                 break;
2751         }
2752         phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
2753         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2754         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2755         return 0;
2756 }
2757
2758 /**
2759  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2760  * @phba: The Hba for which this call is being executed.
2761  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2762  * @rspiocbq: Pointer to lpfc_iocbq data structure.
2763  *
2764  * This routine is IOCB completion routine for device reset and target reset
2765  * routine. This routine release scsi buffer associated with lpfc_cmd.
2766  **/
2767 static void
2768 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2769                         struct lpfc_iocbq *cmdiocbq,
2770                         struct lpfc_iocbq *rspiocbq)
2771 {
2772         struct lpfc_scsi_buf *lpfc_cmd =
2773                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2774         if (lpfc_cmd)
2775                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2776         return;
2777 }
2778
2779 /**
2780  * lpfc_info - Info entry point of scsi_host_template data structure
2781  * @host: The scsi host for which this call is being executed.
2782  *
2783  * This routine provides module information about hba.
2784  *
2785  * Reutrn code:
2786  *   Pointer to char - Success.
2787  **/
2788 const char *
2789 lpfc_info(struct Scsi_Host *host)
2790 {
2791         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2792         struct lpfc_hba   *phba = vport->phba;
2793         int len;
2794         static char  lpfcinfobuf[384];
2795
2796         memset(lpfcinfobuf,0,384);
2797         if (phba && phba->pcidev){
2798                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2799                 len = strlen(lpfcinfobuf);
2800                 snprintf(lpfcinfobuf + len,
2801                         384-len,
2802                         " on PCI bus %02x device %02x irq %d",
2803                         phba->pcidev->bus->number,
2804                         phba->pcidev->devfn,
2805                         phba->pcidev->irq);
2806                 len = strlen(lpfcinfobuf);
2807                 if (phba->Port[0]) {
2808                         snprintf(lpfcinfobuf + len,
2809                                  384-len,
2810                                  " port %s",
2811                                  phba->Port);
2812                 }
2813                 len = strlen(lpfcinfobuf);
2814                 if (phba->sli4_hba.link_state.logical_speed) {
2815                         snprintf(lpfcinfobuf + len,
2816                                  384-len,
2817                                  " Logical Link Speed: %d Mbps",
2818                                  phba->sli4_hba.link_state.logical_speed * 10);
2819                 }
2820         }
2821         return lpfcinfobuf;
2822 }
2823
2824 /**
2825  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2826  * @phba: The Hba for which this call is being executed.
2827  *
2828  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
2829  * The default value of cfg_poll_tmo is 10 milliseconds.
2830  **/
2831 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2832 {
2833         unsigned long  poll_tmo_expires =
2834                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2835
2836         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2837                 mod_timer(&phba->fcp_poll_timer,
2838                           poll_tmo_expires);
2839 }
2840
2841 /**
2842  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2843  * @phba: The Hba for which this call is being executed.
2844  *
2845  * This routine starts the fcp_poll_timer of @phba.
2846  **/
2847 void lpfc_poll_start_timer(struct lpfc_hba * phba)
2848 {
2849         lpfc_poll_rearm_timer(phba);
2850 }
2851
2852 /**
2853  * lpfc_poll_timeout - Restart polling timer
2854  * @ptr: Map to lpfc_hba data structure pointer.
2855  *
2856  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
2857  * and FCP Ring interrupt is disable.
2858  **/
2859
2860 void lpfc_poll_timeout(unsigned long ptr)
2861 {
2862         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2863
2864         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2865                 lpfc_sli_handle_fast_ring_event(phba,
2866                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
2867
2868                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
2869                         lpfc_poll_rearm_timer(phba);
2870         }
2871 }
2872
2873 /**
2874  * lpfc_queuecommand - scsi_host_template queuecommand entry point
2875  * @cmnd: Pointer to scsi_cmnd data structure.
2876  * @done: Pointer to done routine.
2877  *
2878  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
2879  * This routine prepares an IOCB from scsi command and provides to firmware.
2880  * The @done callback is invoked after driver finished processing the command.
2881  *
2882  * Return value :
2883  *   0 - Success
2884  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
2885  **/
2886 static int
2887 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
2888 {
2889         struct Scsi_Host  *shost = cmnd->device->host;
2890         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
2891         struct lpfc_hba   *phba = vport->phba;
2892         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
2893         struct lpfc_nodelist *ndlp;
2894         struct lpfc_scsi_buf *lpfc_cmd;
2895         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
2896         int err;
2897
2898         err = fc_remote_port_chkready(rport);
2899         if (err) {
2900                 cmnd->result = err;
2901                 goto out_fail_command;
2902         }
2903         ndlp = rdata->pnode;
2904
2905         if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
2906                 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2907
2908                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2909                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
2910                                 " op:%02x str=%s without registering for"
2911                                 " BlockGuard - Rejecting command\n",
2912                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2913                                 dif_op_str[scsi_get_prot_op(cmnd)]);
2914                 goto out_fail_command;
2915         }
2916
2917         /*
2918          * Catch race where our node has transitioned, but the
2919          * transport is still transitioning.
2920          */
2921         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
2922                 cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2923                 goto out_fail_command;
2924         }
2925         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
2926                 goto out_host_busy;
2927
2928         lpfc_cmd = lpfc_get_scsi_buf(phba);
2929         if (lpfc_cmd == NULL) {
2930                 lpfc_rampdown_queue_depth(phba);
2931
2932                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2933                                  "0707 driver's buffer pool is empty, "
2934                                  "IO busied\n");
2935                 goto out_host_busy;
2936         }
2937
2938         /*
2939          * Store the midlayer's command structure for the completion phase
2940          * and complete the command initialization.
2941          */
2942         lpfc_cmd->pCmd  = cmnd;
2943         lpfc_cmd->rdata = rdata;
2944         lpfc_cmd->timeout = 0;
2945         lpfc_cmd->start_time = jiffies;
2946         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
2947         cmnd->scsi_done = done;
2948
2949         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2950                 if (vport->phba->cfg_enable_bg) {
2951                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2952                                 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
2953                                 "str=%s\n",
2954                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2955                                 dif_op_str[scsi_get_prot_op(cmnd)]);
2956                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2957                                 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
2958                                 "%02x %02x %02x %02x %02x\n",
2959                                 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
2960                                 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
2961                                 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
2962                                 cmnd->cmnd[9]);
2963                         if (cmnd->cmnd[0] == READ_10)
2964                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2965                                         "9035 BLKGRD: READ @ sector %llu, "
2966                                         "count %u\n",
2967                                         (unsigned long long)scsi_get_lba(cmnd),
2968                                         blk_rq_sectors(cmnd->request));
2969                         else if (cmnd->cmnd[0] == WRITE_10)
2970                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2971                                         "9036 BLKGRD: WRITE @ sector %llu, "
2972                                         "count %u cmd=%p\n",
2973                                         (unsigned long long)scsi_get_lba(cmnd),
2974                                         blk_rq_sectors(cmnd->request),
2975                                         cmnd);
2976                 }
2977
2978                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
2979         } else {
2980                 if (vport->phba->cfg_enable_bg) {
2981                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2982                                         "9038 BLKGRD: rcvd unprotected cmd:"
2983                                         "%02x op:%02x str=%s\n",
2984                                         cmnd->cmnd[0], scsi_get_prot_op(cmnd),
2985                                         dif_op_str[scsi_get_prot_op(cmnd)]);
2986                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2987                                         "9039 BLKGRD: CDB: %02x %02x %02x "
2988                                         "%02x %02x %02x %02x %02x %02x %02x\n",
2989                                         cmnd->cmnd[0], cmnd->cmnd[1],
2990                                         cmnd->cmnd[2], cmnd->cmnd[3],
2991                                         cmnd->cmnd[4], cmnd->cmnd[5],
2992                                         cmnd->cmnd[6], cmnd->cmnd[7],
2993                                         cmnd->cmnd[8], cmnd->cmnd[9]);
2994                         if (cmnd->cmnd[0] == READ_10)
2995                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2996                                         "9040 dbg: READ @ sector %llu, "
2997                                         "count %u\n",
2998                                         (unsigned long long)scsi_get_lba(cmnd),
2999                                          blk_rq_sectors(cmnd->request));
3000                         else if (cmnd->cmnd[0] == WRITE_10)
3001                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3002                                          "9041 dbg: WRITE @ sector %llu, "
3003                                          "count %u cmd=%p\n",
3004                                          (unsigned long long)scsi_get_lba(cmnd),
3005                                          blk_rq_sectors(cmnd->request), cmnd);
3006                         else
3007                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3008                                          "9042 dbg: parser not implemented\n");
3009                 }
3010                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3011         }
3012
3013         if (err)
3014                 goto out_host_busy_free_buf;
3015
3016         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
3017
3018         atomic_inc(&ndlp->cmd_pending);
3019         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3020                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3021         if (err) {
3022                 atomic_dec(&ndlp->cmd_pending);
3023                 goto out_host_busy_free_buf;
3024         }
3025         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3026                 spin_unlock(shost->host_lock);
3027                 lpfc_sli_handle_fast_ring_event(phba,
3028                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3029
3030                 spin_lock(shost->host_lock);
3031                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3032                         lpfc_poll_rearm_timer(phba);
3033         }
3034
3035         return 0;
3036
3037  out_host_busy_free_buf:
3038         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3039         lpfc_release_scsi_buf(phba, lpfc_cmd);
3040  out_host_busy:
3041         return SCSI_MLQUEUE_HOST_BUSY;
3042
3043  out_fail_command:
3044         done(cmnd);
3045         return 0;
3046 }
3047
3048 /**
3049  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3050  * @cmnd: Pointer to scsi_cmnd data structure.
3051  *
3052  * This routine aborts @cmnd pending in base driver.
3053  *
3054  * Return code :
3055  *   0x2003 - Error
3056  *   0x2002 - Success
3057  **/
3058 static int
3059 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3060 {
3061         struct Scsi_Host  *shost = cmnd->device->host;
3062         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3063         struct lpfc_hba   *phba = vport->phba;
3064         struct lpfc_iocbq *iocb;
3065         struct lpfc_iocbq *abtsiocb;
3066         struct lpfc_scsi_buf *lpfc_cmd;
3067         IOCB_t *cmd, *icmd;
3068         int ret = SUCCESS;
3069         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3070
3071         ret = fc_block_scsi_eh(cmnd);
3072         if (ret)
3073                 return ret;
3074         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3075         BUG_ON(!lpfc_cmd);
3076
3077         /*
3078          * If pCmd field of the corresponding lpfc_scsi_buf structure
3079          * points to a different SCSI command, then the driver has
3080          * already completed this command, but the midlayer did not
3081          * see the completion before the eh fired.  Just return
3082          * SUCCESS.
3083          */
3084         iocb = &lpfc_cmd->cur_iocbq;
3085         if (lpfc_cmd->pCmd != cmnd)
3086                 goto out;
3087
3088         BUG_ON(iocb->context1 != lpfc_cmd);
3089
3090         abtsiocb = lpfc_sli_get_iocbq(phba);
3091         if (abtsiocb == NULL) {
3092                 ret = FAILED;
3093                 goto out;
3094         }
3095
3096         /*
3097          * The scsi command can not be in txq and it is in flight because the
3098          * pCmd is still pointig at the SCSI command we have to abort. There
3099          * is no need to search the txcmplq. Just send an abort to the FW.
3100          */
3101
3102         cmd = &iocb->iocb;
3103         icmd = &abtsiocb->iocb;
3104         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3105         icmd->un.acxri.abortContextTag = cmd->ulpContext;
3106         if (phba->sli_rev == LPFC_SLI_REV4)
3107                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3108         else
3109                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3110
3111         icmd->ulpLe = 1;
3112         icmd->ulpClass = cmd->ulpClass;
3113
3114         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3115         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3116         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3117
3118         if (lpfc_is_link_up(phba))
3119                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3120         else
3121                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3122
3123         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3124         abtsiocb->vport = vport;
3125         if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3126             IOCB_ERROR) {
3127                 lpfc_sli_release_iocbq(phba, abtsiocb);
3128                 ret = FAILED;
3129                 goto out;
3130         }
3131
3132         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3133                 lpfc_sli_handle_fast_ring_event(phba,
3134                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3135
3136         lpfc_cmd->waitq = &waitq;
3137         /* Wait for abort to complete */
3138         wait_event_timeout(waitq,
3139                           (lpfc_cmd->pCmd != cmnd),
3140                            (2*vport->cfg_devloss_tmo*HZ));
3141
3142         spin_lock_irq(shost->host_lock);
3143         lpfc_cmd->waitq = NULL;
3144         spin_unlock_irq(shost->host_lock);
3145
3146         if (lpfc_cmd->pCmd == cmnd) {
3147                 ret = FAILED;
3148                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3149                                  "0748 abort handler timed out waiting "
3150                                  "for abort to complete: ret %#x, ID %d, "
3151                                  "LUN %d, snum %#lx\n",
3152                                  ret, cmnd->device->id, cmnd->device->lun,
3153                                  cmnd->serial_number);
3154         }
3155
3156  out:
3157         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3158                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3159                          "LUN %d snum %#lx\n", ret, cmnd->device->id,
3160                          cmnd->device->lun, cmnd->serial_number);
3161         return ret;
3162 }
3163
3164 static char *
3165 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3166 {
3167         switch (task_mgmt_cmd) {
3168         case FCP_ABORT_TASK_SET:
3169                 return "ABORT_TASK_SET";
3170         case FCP_CLEAR_TASK_SET:
3171                 return "FCP_CLEAR_TASK_SET";
3172         case FCP_BUS_RESET:
3173                 return "FCP_BUS_RESET";
3174         case FCP_LUN_RESET:
3175                 return "FCP_LUN_RESET";
3176         case FCP_TARGET_RESET:
3177                 return "FCP_TARGET_RESET";
3178         case FCP_CLEAR_ACA:
3179                 return "FCP_CLEAR_ACA";
3180         case FCP_TERMINATE_TASK:
3181                 return "FCP_TERMINATE_TASK";
3182         default:
3183                 return "unknown";
3184         }
3185 }
3186
3187 /**
3188  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3189  * @vport: The virtual port for which this call is being executed.
3190  * @rdata: Pointer to remote port local data
3191  * @tgt_id: Target ID of remote device.
3192  * @lun_id: Lun number for the TMF
3193  * @task_mgmt_cmd: type of TMF to send
3194  *
3195  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3196  * a remote port.
3197  *
3198  * Return Code:
3199  *   0x2003 - Error
3200  *   0x2002 - Success.
3201  **/
3202 static int
3203 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3204                     unsigned  tgt_id, unsigned int lun_id,
3205                     uint8_t task_mgmt_cmd)
3206 {
3207         struct lpfc_hba   *phba = vport->phba;
3208         struct lpfc_scsi_buf *lpfc_cmd;
3209         struct lpfc_iocbq *iocbq;
3210         struct lpfc_iocbq *iocbqrsp;
3211         int ret;
3212         int status;
3213
3214         if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
3215                 return FAILED;
3216
3217         lpfc_cmd = lpfc_get_scsi_buf(phba);
3218         if (lpfc_cmd == NULL)
3219                 return FAILED;
3220         lpfc_cmd->timeout = 60;
3221         lpfc_cmd->rdata = rdata;
3222
3223         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3224                                            task_mgmt_cmd);
3225         if (!status) {
3226                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3227                 return FAILED;
3228         }
3229
3230         iocbq = &lpfc_cmd->cur_iocbq;
3231         iocbqrsp = lpfc_sli_get_iocbq(phba);
3232         if (iocbqrsp == NULL) {
3233                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3234                 return FAILED;
3235         }
3236
3237         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3238                          "0702 Issue %s to TGT %d LUN %d "
3239                          "rpi x%x nlp_flag x%x\n",
3240                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3241                          rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
3242
3243         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3244                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
3245         if (status != IOCB_SUCCESS) {
3246                 if (status == IOCB_TIMEDOUT) {
3247                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3248                         ret = TIMEOUT_ERROR;
3249                 } else
3250                         ret = FAILED;
3251                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3252                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3253                          "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
3254                          lpfc_taskmgmt_name(task_mgmt_cmd),
3255                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3256                          iocbqrsp->iocb.un.ulpWord[4]);
3257         } else if (status == IOCB_BUSY)
3258                 ret = FAILED;
3259         else
3260                 ret = SUCCESS;
3261
3262         lpfc_sli_release_iocbq(phba, iocbqrsp);
3263
3264         if (ret != TIMEOUT_ERROR)
3265                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3266
3267         return ret;
3268 }
3269
3270 /**
3271  * lpfc_chk_tgt_mapped -
3272  * @vport: The virtual port to check on
3273  * @cmnd: Pointer to scsi_cmnd data structure.
3274  *
3275  * This routine delays until the scsi target (aka rport) for the
3276  * command exists (is present and logged in) or we declare it non-existent.
3277  *
3278  * Return code :
3279  *  0x2003 - Error
3280  *  0x2002 - Success
3281  **/
3282 static int
3283 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3284 {
3285         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3286         struct lpfc_nodelist *pnode;
3287         unsigned long later;
3288
3289         if (!rdata) {
3290                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3291                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3292                 return FAILED;
3293         }
3294         pnode = rdata->pnode;
3295         /*
3296          * If target is not in a MAPPED state, delay until
3297          * target is rediscovered or devloss timeout expires.
3298          */
3299         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3300         while (time_after(later, jiffies)) {
3301                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3302                         return FAILED;
3303                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3304                         return SUCCESS;
3305                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3306                 rdata = cmnd->device->hostdata;
3307                 if (!rdata)
3308                         return FAILED;
3309                 pnode = rdata->pnode;
3310         }
3311         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3312             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3313                 return FAILED;
3314         return SUCCESS;
3315 }
3316
3317 /**
3318  * lpfc_reset_flush_io_context -
3319  * @vport: The virtual port (scsi_host) for the flush context
3320  * @tgt_id: If aborting by Target contect - specifies the target id
3321  * @lun_id: If aborting by Lun context - specifies the lun id
3322  * @context: specifies the context level to flush at.
3323  *
3324  * After a reset condition via TMF, we need to flush orphaned i/o
3325  * contexts from the adapter. This routine aborts any contexts
3326  * outstanding, then waits for their completions. The wait is
3327  * bounded by devloss_tmo though.
3328  *
3329  * Return code :
3330  *  0x2003 - Error
3331  *  0x2002 - Success
3332  **/
3333 static int
3334 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3335                         uint64_t lun_id, lpfc_ctx_cmd context)
3336 {
3337         struct lpfc_hba   *phba = vport->phba;
3338         unsigned long later;
3339         int cnt;
3340
3341         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3342         if (cnt)
3343                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3344                                     tgt_id, lun_id, context);
3345         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3346         while (time_after(later, jiffies) && cnt) {
3347                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3348                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3349         }
3350         if (cnt) {
3351                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3352                         "0724 I/O flush failure for context %s : cnt x%x\n",
3353                         ((context == LPFC_CTX_LUN) ? "LUN" :
3354                          ((context == LPFC_CTX_TGT) ? "TGT" :
3355                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3356                         cnt);
3357                 return FAILED;
3358         }
3359         return SUCCESS;
3360 }
3361
3362 /**
3363  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3364  * @cmnd: Pointer to scsi_cmnd data structure.
3365  *
3366  * This routine does a device reset by sending a LUN_RESET task management
3367  * command.
3368  *
3369  * Return code :
3370  *  0x2003 - Error
3371  *  0x2002 - Success
3372  **/
3373 static int
3374 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3375 {
3376         struct Scsi_Host  *shost = cmnd->device->host;
3377         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3378         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3379         struct lpfc_nodelist *pnode;
3380         unsigned tgt_id = cmnd->device->id;
3381         unsigned int lun_id = cmnd->device->lun;
3382         struct lpfc_scsi_event_header scsi_event;
3383         int status;
3384
3385         if (!rdata) {
3386                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3387                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
3388                 return FAILED;
3389         }
3390         pnode = rdata->pnode;
3391         status = fc_block_scsi_eh(cmnd);
3392         if (status)
3393                 return status;
3394
3395         status = lpfc_chk_tgt_mapped(vport, cmnd);
3396         if (status == FAILED) {
3397                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3398                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
3399                 return FAILED;
3400         }
3401
3402         scsi_event.event_type = FC_REG_SCSI_EVENT;
3403         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3404         scsi_event.lun = lun_id;
3405         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3406         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3407
3408         fc_host_post_vendor_event(shost, fc_get_event_number(),
3409                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3410
3411         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3412                                                 FCP_LUN_RESET);
3413
3414         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3415                          "0713 SCSI layer issued Device Reset (%d, %d) "
3416                          "return x%x\n", tgt_id, lun_id, status);
3417
3418         /*
3419          * We have to clean up i/o as : they may be orphaned by the TMF;
3420          * or if the TMF failed, they may be in an indeterminate state.
3421          * So, continue on.
3422          * We will report success if all the i/o aborts successfully.
3423          */
3424         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3425                                                 LPFC_CTX_LUN);
3426         return status;
3427 }
3428
3429 /**
3430  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3431  * @cmnd: Pointer to scsi_cmnd data structure.
3432  *
3433  * This routine does a target reset by sending a TARGET_RESET task management
3434  * command.
3435  *
3436  * Return code :
3437  *  0x2003 - Error
3438  *  0x2002 - Success
3439  **/
3440 static int
3441 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3442 {
3443         struct Scsi_Host  *shost = cmnd->device->host;
3444         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3445         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3446         struct lpfc_nodelist *pnode;
3447         unsigned tgt_id = cmnd->device->id;
3448         unsigned int lun_id = cmnd->device->lun;
3449         struct lpfc_scsi_event_header scsi_event;
3450         int status;
3451
3452         if (!rdata) {
3453                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3454                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
3455                 return FAILED;
3456         }
3457         pnode = rdata->pnode;
3458         status = fc_block_scsi_eh(cmnd);
3459         if (status)
3460                 return status;
3461
3462         status = lpfc_chk_tgt_mapped(vport, cmnd);
3463         if (status == FAILED) {
3464                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3465                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
3466                 return FAILED;
3467         }
3468
3469         scsi_event.event_type = FC_REG_SCSI_EVENT;
3470         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3471         scsi_event.lun = 0;
3472         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3473         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3474
3475         fc_host_post_vendor_event(shost, fc_get_event_number(),
3476                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3477
3478         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3479                                         FCP_TARGET_RESET);
3480
3481         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3482                          "0723 SCSI layer issued Target Reset (%d, %d) "
3483                          "return x%x\n", tgt_id, lun_id, status);
3484
3485         /*
3486          * We have to clean up i/o as : they may be orphaned by the TMF;
3487          * or if the TMF failed, they may be in an indeterminate state.
3488          * So, continue on.
3489          * We will report success if all the i/o aborts successfully.
3490          */
3491         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3492                                         LPFC_CTX_TGT);
3493         return status;
3494 }
3495
3496 /**
3497  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3498  * @cmnd: Pointer to scsi_cmnd data structure.
3499  *
3500  * This routine does target reset to all targets on @cmnd->device->host.
3501  * This emulates Parallel SCSI Bus Reset Semantics.
3502  *
3503  * Return code :
3504  *  0x2003 - Error
3505  *  0x2002 - Success
3506  **/
3507 static int
3508 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3509 {
3510         struct Scsi_Host  *shost = cmnd->device->host;
3511         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3512         struct lpfc_nodelist *ndlp = NULL;
3513         struct lpfc_scsi_event_header scsi_event;
3514         int match;
3515         int ret = SUCCESS, status, i;
3516
3517         scsi_event.event_type = FC_REG_SCSI_EVENT;
3518         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3519         scsi_event.lun = 0;
3520         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3521         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3522
3523         fc_host_post_vendor_event(shost, fc_get_event_number(),
3524                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3525
3526         ret = fc_block_scsi_eh(cmnd);
3527         if (ret)
3528                 return ret;
3529
3530         /*
3531          * Since the driver manages a single bus device, reset all
3532          * targets known to the driver.  Should any target reset
3533          * fail, this routine returns failure to the midlayer.
3534          */
3535         for (i = 0; i < LPFC_MAX_TARGET; i++) {
3536                 /* Search for mapped node by target ID */
3537                 match = 0;
3538                 spin_lock_irq(shost->host_lock);
3539                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3540                         if (!NLP_CHK_NODE_ACT(ndlp))
3541                                 continue;
3542                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3543                             ndlp->nlp_sid == i &&
3544                             ndlp->rport) {
3545                                 match = 1;
3546                                 break;
3547                         }
3548                 }
3549                 spin_unlock_irq(shost->host_lock);
3550                 if (!match)
3551                         continue;
3552
3553                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3554                                         i, 0, FCP_TARGET_RESET);
3555
3556                 if (status != SUCCESS) {
3557                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3558                                          "0700 Bus Reset on target %d failed\n",
3559                                          i);
3560                         ret = FAILED;
3561                 }
3562         }
3563         /*
3564          * We have to clean up i/o as : they may be orphaned by the TMFs
3565          * above; or if any of the TMFs failed, they may be in an
3566          * indeterminate state.
3567          * We will report success if all the i/o aborts successfully.
3568          */
3569
3570         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3571         if (status != SUCCESS)
3572                 ret = FAILED;
3573
3574         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3575                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3576         return ret;
3577 }
3578
3579 /**
3580  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3581  * @sdev: Pointer to scsi_device.
3582  *
3583  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
3584  * globally available list of scsi buffers. This routine also makes sure scsi
3585  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3586  * of scsi buffer exists for the lifetime of the driver.
3587  *
3588  * Return codes:
3589  *   non-0 - Error
3590  *   0 - Success
3591  **/
3592 static int
3593 lpfc_slave_alloc(struct scsi_device *sdev)
3594 {
3595         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3596         struct lpfc_hba   *phba = vport->phba;
3597         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3598         uint32_t total = 0;
3599         uint32_t num_to_alloc = 0;
3600         int num_allocated = 0;
3601         uint32_t sdev_cnt;
3602
3603         if (!rport || fc_remote_port_chkready(rport))
3604                 return -ENXIO;
3605
3606         sdev->hostdata = rport->dd_data;
3607         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
3608
3609         /*
3610          * Populate the cmds_per_lun count scsi_bufs into this host's globally
3611          * available list of scsi buffers.  Don't allocate more than the
3612          * HBA limit conveyed to the midlayer via the host structure.  The
3613          * formula accounts for the lun_queue_depth + error handlers + 1
3614          * extra.  This list of scsi bufs exists for the lifetime of the driver.
3615          */
3616         total = phba->total_scsi_bufs;
3617         num_to_alloc = vport->cfg_lun_queue_depth + 2;
3618
3619         /* If allocated buffers are enough do nothing */
3620         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3621                 return 0;
3622
3623         /* Allow some exchanges to be available always to complete discovery */
3624         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3625                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3626                                  "0704 At limitation of %d preallocated "
3627                                  "command buffers\n", total);
3628                 return 0;
3629         /* Allow some exchanges to be available always to complete discovery */
3630         } else if (total + num_to_alloc >
3631                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3632                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3633                                  "0705 Allocation request of %d "
3634                                  "command buffers will exceed max of %d.  "
3635                                  "Reducing allocation request to %d.\n",
3636                                  num_to_alloc, phba->cfg_hba_queue_depth,
3637                                  (phba->cfg_hba_queue_depth - total));
3638                 num_to_alloc = phba->cfg_hba_queue_depth - total;
3639         }
3640         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3641         if (num_to_alloc != num_allocated) {
3642                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3643                                  "0708 Allocation request of %d "
3644                                  "command buffers did not succeed.  "
3645                                  "Allocated %d buffers.\n",
3646                                  num_to_alloc, num_allocated);
3647         }
3648         if (num_allocated > 0)
3649                 phba->total_scsi_bufs += num_allocated;
3650         return 0;
3651 }
3652
3653 /**
3654  * lpfc_slave_configure - scsi_host_template slave_configure entry point
3655  * @sdev: Pointer to scsi_device.
3656  *
3657  * This routine configures following items
3658  *   - Tag command queuing support for @sdev if supported.
3659  *   - Dev loss time out value of fc_rport.
3660  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3661  *
3662  * Return codes:
3663  *   0 - Success
3664  **/
3665 static int
3666 lpfc_slave_configure(struct scsi_device *sdev)
3667 {
3668         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3669         struct lpfc_hba   *phba = vport->phba;
3670         struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
3671
3672         if (sdev->tagged_supported)
3673                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3674         else
3675                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3676
3677         /*
3678          * Initialize the fc transport attributes for the target
3679          * containing this scsi device.  Also note that the driver's
3680          * target pointer is stored in the starget_data for the
3681          * driver's sysfs entry point functions.
3682          */
3683         rport->dev_loss_tmo = vport->cfg_devloss_tmo;
3684
3685         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3686                 lpfc_sli_handle_fast_ring_event(phba,
3687                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3688                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3689                         lpfc_poll_rearm_timer(phba);
3690         }
3691
3692         return 0;
3693 }
3694
3695 /**
3696  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3697  * @sdev: Pointer to scsi_device.
3698  *
3699  * This routine sets @sdev hostatdata filed to null.
3700  **/
3701 static void
3702 lpfc_slave_destroy(struct scsi_device *sdev)
3703 {
3704         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3705         struct lpfc_hba   *phba = vport->phba;
3706         atomic_dec(&phba->sdev_cnt);
3707         sdev->hostdata = NULL;
3708         return;
3709 }
3710
3711
3712 struct scsi_host_template lpfc_template = {
3713         .module                 = THIS_MODULE,
3714         .name                   = LPFC_DRIVER_NAME,
3715         .info                   = lpfc_info,
3716         .queuecommand           = lpfc_queuecommand,
3717         .eh_abort_handler       = lpfc_abort_handler,
3718         .eh_device_reset_handler = lpfc_device_reset_handler,
3719         .eh_target_reset_handler = lpfc_target_reset_handler,
3720         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3721         .slave_alloc            = lpfc_slave_alloc,
3722         .slave_configure        = lpfc_slave_configure,
3723         .slave_destroy          = lpfc_slave_destroy,
3724         .scan_finished          = lpfc_scan_finished,
3725         .this_id                = -1,
3726         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3727         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3728         .use_clustering         = ENABLE_CLUSTERING,
3729         .shost_attrs            = lpfc_hba_attrs,
3730         .max_sectors            = 0xFFFF,
3731         .vendor_id              = LPFC_NL_VENDOR_ID,
3732         .change_queue_depth     = lpfc_change_queue_depth,
3733 };
3734
3735 struct scsi_host_template lpfc_vport_template = {
3736         .module                 = THIS_MODULE,
3737         .name                   = LPFC_DRIVER_NAME,
3738         .info                   = lpfc_info,
3739         .queuecommand           = lpfc_queuecommand,
3740         .eh_abort_handler       = lpfc_abort_handler,
3741         .eh_device_reset_handler = lpfc_device_reset_handler,
3742         .eh_target_reset_handler = lpfc_target_reset_handler,
3743         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3744         .slave_alloc            = lpfc_slave_alloc,
3745         .slave_configure        = lpfc_slave_configure,
3746         .slave_destroy          = lpfc_slave_destroy,
3747         .scan_finished          = lpfc_scan_finished,
3748         .this_id                = -1,
3749         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3750         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3751         .use_clustering         = ENABLE_CLUSTERING,
3752         .shost_attrs            = lpfc_vport_attrs,
3753         .max_sectors            = 0xFFFF,
3754         .change_queue_depth     = lpfc_change_queue_depth,
3755 };