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) 2004-2014 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/export.h>
  25 #include <linux/delay.h>
  26 #include <asm/unaligned.h>
  27 #include <linux/crc-t10dif.h>
  28 #include <net/checksum.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_eh.h>
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/scsi_transport_fc.h>
  36
  37 #include "lpfc_version.h"
  38 #include "lpfc_hw4.h"
  39 #include "lpfc_hw.h"
  40 #include "lpfc_sli.h"
  41 #include "lpfc_sli4.h"
  42 #include "lpfc_nl.h"
  43 #include "lpfc_disc.h"
  44 #include "lpfc.h"
  45 #include "lpfc_scsi.h"
  46 #include "lpfc_logmsg.h"
  47 #include "lpfc_crtn.h"
  48 #include "lpfc_vport.h"
  49
  50 #define LPFC_RESET_WAIT  2
  51 #define LPFC_ABORT_WAIT  2
  52
  53 int _dump_buf_done = 1;
  54
  55 static char *dif_op_str[] = {
  56         "PROT_NORMAL",
  57         "PROT_READ_INSERT",
  58         "PROT_WRITE_STRIP",
  59         "PROT_READ_STRIP",
  60         "PROT_WRITE_INSERT",
  61         "PROT_READ_PASS",
  62         "PROT_WRITE_PASS",
  63 };
  64
  65 struct scsi_dif_tuple {
  66         __be16 guard_tag;       /* Checksum */
  67         __be16 app_tag;         /* Opaque storage */
  68         __be32 ref_tag;         /* Target LBA or indirect LBA */
  69 };
  70
  71 static struct lpfc_rport_data *
  72 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  73 {
  74         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  75
  76         if (vport->phba->cfg_fof)
  77                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  78         else
  79                 return (struct lpfc_rport_data *)sdev->hostdata;
  80 }
  81
  82 static void
  83 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  84 static void
  85 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  86 static int
  87 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  88
  89 static void
  90 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  91 {
  92         void *src, *dst;
  93         struct scatterlist *sgde = scsi_sglist(cmnd);
  94
  95         if (!_dump_buf_data) {
  96                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  97                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  98                                 __func__);
  99                 return;
 100         }
 101
 102
 103         if (!sgde) {
 104                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 105                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
 106                 return;
 107         }
 108
 109         dst = (void *) _dump_buf_data;
 110         while (sgde) {
 111                 src = sg_virt(sgde);
 112                 memcpy(dst, src, sgde->length);
 113                 dst += sgde->length;
 114                 sgde = sg_next(sgde);
 115         }
 116 }
 117
 118 static void
 119 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
 120 {
 121         void *src, *dst;
 122         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 123
 124         if (!_dump_buf_dif) {
 125                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 126                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 127                                 __func__);
 128                 return;
 129         }
 130
 131         if (!sgde) {
 132                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 133                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 134                 return;
 135         }
 136
 137         dst = _dump_buf_dif;
 138         while (sgde) {
 139                 src = sg_virt(sgde);
 140                 memcpy(dst, src, sgde->length);
 141                 dst += sgde->length;
 142                 sgde = sg_next(sgde);
 143         }
 144 }
 145
 146 static inline unsigned
 147 lpfc_cmd_blksize(struct scsi_cmnd *sc)
 148 {
 149         return sc->device->sector_size;
 150 }
 151
 152 #define LPFC_CHECK_PROTECT_GUARD        1
 153 #define LPFC_CHECK_PROTECT_REF          2
 154 static inline unsigned
 155 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 156 {
 157         return 1;
 158 }
 159
 160 static inline unsigned
 161 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 162 {
 163         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 164                 return 0;
 165         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 166                 return 1;
 167         return 0;
 168 }
 169
 170 /**
 171  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 172  * @phba: Pointer to HBA object.
 173  * @lpfc_cmd: lpfc scsi command object pointer.
 174  *
 175  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 176  * set the last bit in the response sge entry.
 177  **/
 178 static void
 179 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 180                                 struct lpfc_scsi_buf *lpfc_cmd)
 181 {
 182         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 183         if (sgl) {
 184                 sgl += 1;
 185                 sgl->word2 = le32_to_cpu(sgl->word2);
 186                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 187                 sgl->word2 = cpu_to_le32(sgl->word2);
 188         }
 189 }
 190
 191 /**
 192  * lpfc_update_stats - Update statistical data for the command completion
 193  * @phba: Pointer to HBA object.
 194  * @lpfc_cmd: lpfc scsi command object pointer.
 195  *
 196  * This function is called when there is a command completion and this
 197  * function updates the statistical data for the command completion.
 198  **/
 199 static void
 200 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 201 {
 202         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 203         struct lpfc_nodelist *pnode = rdata->pnode;
 204         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 205         unsigned long flags;
 206         struct Scsi_Host  *shost = cmd->device->host;
 207         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 208         unsigned long latency;
 209         int i;
 210
 211         if (cmd->result)
 212                 return;
 213
 214         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 215
 216         spin_lock_irqsave(shost->host_lock, flags);
 217         if (!vport->stat_data_enabled ||
 218                 vport->stat_data_blocked ||
 219                 !pnode ||
 220                 !pnode->lat_data ||
 221                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 222                 spin_unlock_irqrestore(shost->host_lock, flags);
 223                 return;
 224         }
 225
 226         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 227                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 228                         phba->bucket_step;
 229                 /* check array subscript bounds */
 230                 if (i < 0)
 231                         i = 0;
 232                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 233                         i = LPFC_MAX_BUCKET_COUNT - 1;
 234         } else {
 235                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 236                         if (latency <= (phba->bucket_base +
 237                                 ((1<<i)*phba->bucket_step)))
 238                                 break;
 239         }
 240
 241         pnode->lat_data[i].cmd_count++;
 242         spin_unlock_irqrestore(shost->host_lock, flags);
 243 }
 244
 245 /**
 246  * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
 247  * @phba: Pointer to HBA context object.
 248  * @vport: Pointer to vport object.
 249  * @ndlp: Pointer to FC node associated with the target.
 250  * @lun: Lun number of the scsi device.
 251  * @old_val: Old value of the queue depth.
 252  * @new_val: New value of the queue depth.
 253  *
 254  * This function sends an event to the mgmt application indicating
 255  * there is a change in the scsi device queue depth.
 256  **/
 257 static void
 258 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 259                 struct lpfc_vport  *vport,
 260                 struct lpfc_nodelist *ndlp,
 261                 uint64_t lun,
 262                 uint32_t old_val,
 263                 uint32_t new_val)
 264 {
 265         struct lpfc_fast_path_event *fast_path_evt;
 266         unsigned long flags;
 267
 268         fast_path_evt = lpfc_alloc_fast_evt(phba);
 269         if (!fast_path_evt)
 270                 return;
 271
 272         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 273                 FC_REG_SCSI_EVENT;
 274         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 275                 LPFC_EVENT_VARQUEDEPTH;
 276
 277         /* Report all luns with change in queue depth */
 278         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 279         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 280                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 281                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 282                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 283                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 284         }
 285
 286         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 287         fast_path_evt->un.queue_depth_evt.newval = new_val;
 288         fast_path_evt->vport = vport;
 289
 290         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 291         spin_lock_irqsave(&phba->hbalock, flags);
 292         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 293         spin_unlock_irqrestore(&phba->hbalock, flags);
 294         lpfc_worker_wake_up(phba);
 295
 296         return;
 297 }
 298
 299 /**
 300  * lpfc_change_queue_depth - Alter scsi device queue depth
 301  * @sdev: Pointer the scsi device on which to change the queue depth.
 302  * @qdepth: New queue depth to set the sdev to.
 303  * @reason: The reason for the queue depth change.
 304  *
 305  * This function is called by the midlayer and the LLD to alter the queue
 306  * depth for a scsi device. This function sets the queue depth to the new
 307  * value and sends an event out to log the queue depth change.
 308  **/
 309 int
 310 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 311 {
 312         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
 313         struct lpfc_hba   *phba = vport->phba;
 314         struct lpfc_rport_data *rdata;
 315         unsigned long new_queue_depth, old_queue_depth;
 316
 317         old_queue_depth = sdev->queue_depth;
 318
 319         switch (reason) {
 320         case SCSI_QDEPTH_DEFAULT:
 321                 /* change request from sysfs, fall through */
 322         case SCSI_QDEPTH_RAMP_UP:
 323                 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
 324                 break;
 325         case SCSI_QDEPTH_QFULL:
 326                 if (scsi_track_queue_full(sdev, qdepth) == 0)
 327                         return sdev->queue_depth;
 328
 329                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
 330                                  "0711 detected queue full - lun queue "
 331                                  "depth adjusted to %d.\n", sdev->queue_depth);
 332                 break;
 333         default:
 334                 return -EOPNOTSUPP;
 335         }
 336
 337         new_queue_depth = sdev->queue_depth;
 338         rdata = lpfc_rport_data_from_scsi_device(sdev);
 339         if (rdata)
 340                 lpfc_send_sdev_queuedepth_change_event(phba, vport,
 341                                                        rdata->pnode, sdev->lun,
 342                                                        old_queue_depth,
 343                                                        new_queue_depth);
 344         return sdev->queue_depth;
 345 }
 346
 347 /**
 348  * lpfc_change_queue_type() - Change a device's scsi tag queuing type
 349  * @sdev: Pointer the scsi device whose queue depth is to change
 350  * @tag_type: Identifier for queue tag type
 351  */
 352 static int
 353 lpfc_change_queue_type(struct scsi_device *sdev, int tag_type)
 354 {
 355         if (sdev->tagged_supported) {
 356                 scsi_set_tag_type(sdev, tag_type);
 357                 if (tag_type)
 358                         scsi_activate_tcq(sdev, sdev->queue_depth);
 359                 else
 360                         scsi_deactivate_tcq(sdev, sdev->queue_depth);
 361         } else
 362                 tag_type = 0;
 363
 364         return tag_type;
 365 }
 366
 367 /**
 368  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 369  * @phba: The Hba for which this call is being executed.
 370  *
 371  * This routine is called when there is resource error in driver or firmware.
 372  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 373  * posts at most 1 event each second. This routine wakes up worker thread of
 374  * @phba to process WORKER_RAM_DOWN_EVENT event.
 375  *
 376  * This routine should be called with no lock held.
 377  **/
 378 void
 379 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 380 {
 381         unsigned long flags;
 382         uint32_t evt_posted;
 383
 384         spin_lock_irqsave(&phba->hbalock, flags);
 385         atomic_inc(&phba->num_rsrc_err);
 386         phba->last_rsrc_error_time = jiffies;
 387
 388         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 389                 spin_unlock_irqrestore(&phba->hbalock, flags);
 390                 return;
 391         }
 392
 393         phba->last_ramp_down_time = jiffies;
 394
 395         spin_unlock_irqrestore(&phba->hbalock, flags);
 396
 397         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 398         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 399         if (!evt_posted)
 400                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 401         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 402
 403         if (!evt_posted)
 404                 lpfc_worker_wake_up(phba);
 405         return;
 406 }
 407
 408 /**
 409  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 410  * @phba: The Hba for which this call is being executed.
 411  *
 412  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 413  * thread.This routine reduces queue depth for all scsi device on each vport
 414  * associated with @phba.
 415  **/
 416 void
 417 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 418 {
 419         struct lpfc_vport **vports;
 420         struct Scsi_Host  *shost;
 421         struct scsi_device *sdev;
 422         unsigned long new_queue_depth;
 423         unsigned long num_rsrc_err, num_cmd_success;
 424         int i;
 425
 426         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 427         num_cmd_success = atomic_read(&phba->num_cmd_success);
 428
 429         /*
 430          * The error and success command counters are global per
 431          * driver instance.  If another handler has already
 432          * operated on this error event, just exit.
 433          */
 434         if (num_rsrc_err == 0)
 435                 return;
 436
 437         vports = lpfc_create_vport_work_array(phba);
 438         if (vports != NULL)
 439                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 440                         shost = lpfc_shost_from_vport(vports[i]);
 441                         shost_for_each_device(sdev, shost) {
 442                                 new_queue_depth =
 443                                         sdev->queue_depth * num_rsrc_err /
 444                                         (num_rsrc_err + num_cmd_success);
 445                                 if (!new_queue_depth)
 446                                         new_queue_depth = sdev->queue_depth - 1;
 447                                 else
 448                                         new_queue_depth = sdev->queue_depth -
 449                                                                 new_queue_depth;
 450                                 lpfc_change_queue_depth(sdev, new_queue_depth,
 451                                                         SCSI_QDEPTH_DEFAULT);
 452                         }
 453                 }
 454         lpfc_destroy_vport_work_array(phba, vports);
 455         atomic_set(&phba->num_rsrc_err, 0);
 456         atomic_set(&phba->num_cmd_success, 0);
 457 }
 458
 459 /**
 460  * lpfc_scsi_dev_block - set all scsi hosts to block state
 461  * @phba: Pointer to HBA context object.
 462  *
 463  * This function walks vport list and set each SCSI host to block state
 464  * by invoking fc_remote_port_delete() routine. This function is invoked
 465  * with EEH when device's PCI slot has been permanently disabled.
 466  **/
 467 void
 468 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 469 {
 470         struct lpfc_vport **vports;
 471         struct Scsi_Host  *shost;
 472         struct scsi_device *sdev;
 473         struct fc_rport *rport;
 474         int i;
 475
 476         vports = lpfc_create_vport_work_array(phba);
 477         if (vports != NULL)
 478                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 479                         shost = lpfc_shost_from_vport(vports[i]);
 480                         shost_for_each_device(sdev, shost) {
 481                                 rport = starget_to_rport(scsi_target(sdev));
 482                                 fc_remote_port_delete(rport);
 483                         }
 484                 }
 485         lpfc_destroy_vport_work_array(phba, vports);
 486 }
 487
 488 /**
 489  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 490  * @vport: The virtual port for which this call being executed.
 491  * @num_to_allocate: The requested number of buffers to allocate.
 492  *
 493  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 494  * the scsi buffer contains all the necessary information needed to initiate
 495  * a SCSI I/O. The non-DMAable buffer region contains information to build
 496  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 497  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 498  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 499  *
 500  * Return codes:
 501  *   int - number of scsi buffers that were allocated.
 502  *   0 = failure, less than num_to_alloc is a partial failure.
 503  **/
 504 static int
 505 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 506 {
 507         struct lpfc_hba *phba = vport->phba;
 508         struct lpfc_scsi_buf *psb;
 509         struct ulp_bde64 *bpl;
 510         IOCB_t *iocb;
 511         dma_addr_t pdma_phys_fcp_cmd;
 512         dma_addr_t pdma_phys_fcp_rsp;
 513         dma_addr_t pdma_phys_bpl;
 514         uint16_t iotag;
 515         int bcnt, bpl_size;
 516
 517         bpl_size = phba->cfg_sg_dma_buf_size -
 518                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 519
 520         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 521                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 522                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 523                          (int)sizeof(struct fcp_cmnd),
 524                          (int)sizeof(struct fcp_rsp), bpl_size);
 525
 526         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 527                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 528                 if (!psb)
 529                         break;
 530
 531                 /*
 532                  * Get memory from the pci pool to map the virt space to pci
 533                  * bus space for an I/O.  The DMA buffer includes space for the
 534                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 535                  * necessary to support the sg_tablesize.
 536                  */
 537                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 538                                         GFP_KERNEL, &psb->dma_handle);
 539                 if (!psb->data) {
 540                         kfree(psb);
 541                         break;
 542                 }
 543
 544                 /* Initialize virtual ptrs to dma_buf region. */
 545                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 546
 547                 /* Allocate iotag for psb->cur_iocbq. */
 548                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 549                 if (iotag == 0) {
 550                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 551                                         psb->data, psb->dma_handle);
 552                         kfree(psb);
 553                         break;
 554                 }
 555                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 556
 557                 psb->fcp_cmnd = psb->data;
 558                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 559                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 560                         sizeof(struct fcp_rsp);
 561
 562                 /* Initialize local short-hand pointers. */
 563                 bpl = psb->fcp_bpl;
 564                 pdma_phys_fcp_cmd = psb->dma_handle;
 565                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 566                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 567                         sizeof(struct fcp_rsp);
 568
 569                 /*
 570                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 571                  * are sg list bdes.  Initialize the first two and leave the
 572                  * rest for queuecommand.
 573                  */
 574                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 575                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 576                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 577                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 578                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 579
 580                 /* Setup the physical region for the FCP RSP */
 581                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 582                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 583                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 584                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 585                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 586
 587                 /*
 588                  * Since the IOCB for the FCP I/O is built into this
 589                  * lpfc_scsi_buf, initialize it with all known data now.
 590                  */
 591                 iocb = &psb->cur_iocbq.iocb;
 592                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 593                 if ((phba->sli_rev == 3) &&
 594                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 595                         /* fill in immediate fcp command BDE */
 596                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 597                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 598                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 599                                         unsli3.fcp_ext.icd);
 600                         iocb->un.fcpi64.bdl.addrHigh = 0;
 601                         iocb->ulpBdeCount = 0;
 602                         iocb->ulpLe = 0;
 603                         /* fill in response BDE */
 604                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 605                                                         BUFF_TYPE_BDE_64;
 606                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 607                                 sizeof(struct fcp_rsp);
 608                         iocb->unsli3.fcp_ext.rbde.addrLow =
 609                                 putPaddrLow(pdma_phys_fcp_rsp);
 610                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 611                                 putPaddrHigh(pdma_phys_fcp_rsp);
 612                 } else {
 613                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 614                         iocb->un.fcpi64.bdl.bdeSize =
 615                                         (2 * sizeof(struct ulp_bde64));
 616                         iocb->un.fcpi64.bdl.addrLow =
 617                                         putPaddrLow(pdma_phys_bpl);
 618                         iocb->un.fcpi64.bdl.addrHigh =
 619                                         putPaddrHigh(pdma_phys_bpl);
 620                         iocb->ulpBdeCount = 1;
 621                         iocb->ulpLe = 1;
 622                 }
 623                 iocb->ulpClass = CLASS3;
 624                 psb->status = IOSTAT_SUCCESS;
 625                 /* Put it back into the SCSI buffer list */
 626                 psb->cur_iocbq.context1  = psb;
 627                 lpfc_release_scsi_buf_s3(phba, psb);
 628
 629         }
 630
 631         return bcnt;
 632 }
 633
 634 /**
 635  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 636  * @vport: pointer to lpfc vport data structure.
 637  *
 638  * This routine is invoked by the vport cleanup for deletions and the cleanup
 639  * for an ndlp on removal.
 640  **/
 641 void
 642 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 643 {
 644         struct lpfc_hba *phba = vport->phba;
 645         struct lpfc_scsi_buf *psb, *next_psb;
 646         unsigned long iflag = 0;
 647
 648         spin_lock_irqsave(&phba->hbalock, iflag);
 649         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 650         list_for_each_entry_safe(psb, next_psb,
 651                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 652                 if (psb->rdata && psb->rdata->pnode
 653                         && psb->rdata->pnode->vport == vport)
 654                         psb->rdata = NULL;
 655         }
 656         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 657         spin_unlock_irqrestore(&phba->hbalock, iflag);
 658 }
 659
 660 /**
 661  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 662  * @phba: pointer to lpfc hba data structure.
 663  * @axri: pointer to the fcp xri abort wcqe structure.
 664  *
 665  * This routine is invoked by the worker thread to process a SLI4 fast-path
 666  * FCP aborted xri.
 667  **/
 668 void
 669 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 670                           struct sli4_wcqe_xri_aborted *axri)
 671 {
 672         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 673         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 674         struct lpfc_scsi_buf *psb, *next_psb;
 675         unsigned long iflag = 0;
 676         struct lpfc_iocbq *iocbq;
 677         int i;
 678         struct lpfc_nodelist *ndlp;
 679         int rrq_empty = 0;
 680         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 681
 682         spin_lock_irqsave(&phba->hbalock, iflag);
 683         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 684         list_for_each_entry_safe(psb, next_psb,
 685                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 686                 if (psb->cur_iocbq.sli4_xritag == xri) {
 687                         list_del(&psb->list);
 688                         psb->exch_busy = 0;
 689                         psb->status = IOSTAT_SUCCESS;
 690                         spin_unlock(
 691                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 692                         if (psb->rdata && psb->rdata->pnode)
 693                                 ndlp = psb->rdata->pnode;
 694                         else
 695                                 ndlp = NULL;
 696
 697                         rrq_empty = list_empty(&phba->active_rrq_list);
 698                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 699                         if (ndlp) {
 700                                 lpfc_set_rrq_active(phba, ndlp,
 701                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 702                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 703                         }
 704                         lpfc_release_scsi_buf_s4(phba, psb);
 705                         if (rrq_empty)
 706                                 lpfc_worker_wake_up(phba);
 707                         return;
 708                 }
 709         }
 710         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 711         for (i = 1; i <= phba->sli.last_iotag; i++) {
 712                 iocbq = phba->sli.iocbq_lookup[i];
 713
 714                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 715                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 716                         continue;
 717                 if (iocbq->sli4_xritag != xri)
 718                         continue;
 719                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 720                 psb->exch_busy = 0;
 721                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 722                 if (!list_empty(&pring->txq))
 723                         lpfc_worker_wake_up(phba);
 724                 return;
 725
 726         }
 727         spin_unlock_irqrestore(&phba->hbalock, iflag);
 728 }
 729
 730 /**
 731  * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
 732  * @phba: pointer to lpfc hba data structure.
 733  * @post_sblist: pointer to the scsi buffer list.
 734  *
 735  * This routine walks a list of scsi buffers that was passed in. It attempts
 736  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 737  * uses the non-embedded SGL block post mailbox commands to post to the port.
 738  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 739  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 740  * must be local list, thus no lock is needed when manipulate the list.
 741  *
 742  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 743  **/
 744 int
 745 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 746                              struct list_head *post_sblist, int sb_count)
 747 {
 748         struct lpfc_scsi_buf *psb, *psb_next;
 749         int status, sgl_size;
 750         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 751         dma_addr_t pdma_phys_bpl1;
 752         int last_xritag = NO_XRI;
 753         LIST_HEAD(prep_sblist);
 754         LIST_HEAD(blck_sblist);
 755         LIST_HEAD(scsi_sblist);
 756
 757         /* sanity check */
 758         if (sb_count <= 0)
 759                 return -EINVAL;
 760
 761         sgl_size = phba->cfg_sg_dma_buf_size -
 762                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 763
 764         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 765                 list_del_init(&psb->list);
 766                 block_cnt++;
 767                 if ((last_xritag != NO_XRI) &&
 768                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 769                         /* a hole in xri block, form a sgl posting block */
 770                         list_splice_init(&prep_sblist, &blck_sblist);
 771                         post_cnt = block_cnt - 1;
 772                         /* prepare list for next posting block */
 773                         list_add_tail(&psb->list, &prep_sblist);
 774                         block_cnt = 1;
 775                 } else {
 776                         /* prepare list for next posting block */
 777                         list_add_tail(&psb->list, &prep_sblist);
 778                         /* enough sgls for non-embed sgl mbox command */
 779                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 780                                 list_splice_init(&prep_sblist, &blck_sblist);
 781                                 post_cnt = block_cnt;
 782                                 block_cnt = 0;
 783                         }
 784                 }
 785                 num_posting++;
 786                 last_xritag = psb->cur_iocbq.sli4_xritag;
 787
 788                 /* end of repost sgl list condition for SCSI buffers */
 789                 if (num_posting == sb_count) {
 790                         if (post_cnt == 0) {
 791                                 /* last sgl posting block */
 792                                 list_splice_init(&prep_sblist, &blck_sblist);
 793                                 post_cnt = block_cnt;
 794                         } else if (block_cnt == 1) {
 795                                 /* last single sgl with non-contiguous xri */
 796                                 if (sgl_size > SGL_PAGE_SIZE)
 797                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 798                                                                 SGL_PAGE_SIZE;
 799                                 else
 800                                         pdma_phys_bpl1 = 0;
 801                                 status = lpfc_sli4_post_sgl(phba,
 802                                                 psb->dma_phys_bpl,
 803                                                 pdma_phys_bpl1,
 804                                                 psb->cur_iocbq.sli4_xritag);
 805                                 if (status) {
 806                                         /* failure, put on abort scsi list */
 807                                         psb->exch_busy = 1;
 808                                 } else {
 809                                         /* success, put on SCSI buffer list */
 810                                         psb->exch_busy = 0;
 811                                         psb->status = IOSTAT_SUCCESS;
 812                                         num_posted++;
 813                                 }
 814                                 /* success, put on SCSI buffer sgl list */
 815                                 list_add_tail(&psb->list, &scsi_sblist);
 816                         }
 817                 }
 818
 819                 /* continue until a nembed page worth of sgls */
 820                 if (post_cnt == 0)
 821                         continue;
 822
 823                 /* post block of SCSI buffer list sgls */
 824                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 825                                                        post_cnt);
 826
 827                 /* don't reset xirtag due to hole in xri block */
 828                 if (block_cnt == 0)
 829                         last_xritag = NO_XRI;
 830
 831                 /* reset SCSI buffer post count for next round of posting */
 832                 post_cnt = 0;
 833
 834                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 835                 while (!list_empty(&blck_sblist)) {
 836                         list_remove_head(&blck_sblist, psb,
 837                                          struct lpfc_scsi_buf, list);
 838                         if (status) {
 839                                 /* failure, put on abort scsi list */
 840                                 psb->exch_busy = 1;
 841                         } else {
 842                                 /* success, put on SCSI buffer list */
 843                                 psb->exch_busy = 0;
 844                                 psb->status = IOSTAT_SUCCESS;
 845                                 num_posted++;
 846                         }
 847                         list_add_tail(&psb->list, &scsi_sblist);
 848                 }
 849         }
 850         /* Push SCSI buffers with sgl posted to the availble list */
 851         while (!list_empty(&scsi_sblist)) {
 852                 list_remove_head(&scsi_sblist, psb,
 853                                  struct lpfc_scsi_buf, list);
 854                 lpfc_release_scsi_buf_s4(phba, psb);
 855         }
 856         return num_posted;
 857 }
 858
 859 /**
 860  * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 861  * @phba: pointer to lpfc hba data structure.
 862  *
 863  * This routine walks the list of scsi buffers that have been allocated and
 864  * repost them to the port by using SGL block post. This is needed after a
 865  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 866  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 867  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 868  *
 869  * Returns: 0 = success, non-zero failure.
 870  **/
 871 int
 872 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 873 {
 874         LIST_HEAD(post_sblist);
 875         int num_posted, rc = 0;
 876
 877         /* get all SCSI buffers need to repost to a local list */
 878         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 879         spin_lock(&phba->scsi_buf_list_put_lock);
 880         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 881         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 882         spin_unlock(&phba->scsi_buf_list_put_lock);
 883         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 884
 885         /* post the list of scsi buffer sgls to port if available */
 886         if (!list_empty(&post_sblist)) {
 887                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 888                                                 phba->sli4_hba.scsi_xri_cnt);
 889                 /* failed to post any scsi buffer, return error */
 890                 if (num_posted == 0)
 891                         rc = -EIO;
 892         }
 893         return rc;
 894 }
 895
 896 /**
 897  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 898  * @vport: The virtual port for which this call being executed.
 899  * @num_to_allocate: The requested number of buffers to allocate.
 900  *
 901  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 902  * the scsi buffer contains all the necessary information needed to initiate
 903  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 904  * them on a list, it post them to the port by using SGL block post.
 905  *
 906  * Return codes:
 907  *   int - number of scsi buffers that were allocated and posted.
 908  *   0 = failure, less than num_to_alloc is a partial failure.
 909  **/
 910 static int
 911 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 912 {
 913         struct lpfc_hba *phba = vport->phba;
 914         struct lpfc_scsi_buf *psb;
 915         struct sli4_sge *sgl;
 916         IOCB_t *iocb;
 917         dma_addr_t pdma_phys_fcp_cmd;
 918         dma_addr_t pdma_phys_fcp_rsp;
 919         dma_addr_t pdma_phys_bpl;
 920         uint16_t iotag, lxri = 0;
 921         int bcnt, num_posted, sgl_size;
 922         LIST_HEAD(prep_sblist);
 923         LIST_HEAD(post_sblist);
 924         LIST_HEAD(scsi_sblist);
 925
 926         sgl_size = phba->cfg_sg_dma_buf_size -
 927                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 928
 929         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 930                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 931                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 932                          (int)sizeof(struct fcp_cmnd),
 933                          (int)sizeof(struct fcp_rsp));
 934
 935         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 936                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 937                 if (!psb)
 938                         break;
 939                 /*
 940                  * Get memory from the pci pool to map the virt space to
 941                  * pci bus space for an I/O. The DMA buffer includes space
 942                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 943                  * of bde's necessary to support the sg_tablesize.
 944                  */
 945                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 946                                                 GFP_KERNEL, &psb->dma_handle);
 947                 if (!psb->data) {
 948                         kfree(psb);
 949                         break;
 950                 }
 951                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 952
 953                 /*
 954                  * 4K Page alignment is CRITICAL to BlockGuard, double check
 955                  * to be sure.
 956                  */
 957                 if (phba->cfg_enable_bg  && (((unsigned long)(psb->data) &
 958                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
 959                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 960                                       psb->data, psb->dma_handle);
 961                         kfree(psb);
 962                         break;
 963                 }
 964
 965
 966                 lxri = lpfc_sli4_next_xritag(phba);
 967                 if (lxri == NO_XRI) {
 968                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 969                               psb->data, psb->dma_handle);
 970                         kfree(psb);
 971                         break;
 972                 }
 973
 974                 /* Allocate iotag for psb->cur_iocbq. */
 975                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 976                 if (iotag == 0) {
 977                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 978                                 psb->data, psb->dma_handle);
 979                         kfree(psb);
 980                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 981                                         "3368 Failed to allocated IOTAG for"
 982                                         " XRI:0x%x\n", lxri);
 983                         lpfc_sli4_free_xri(phba, lxri);
 984                         break;
 985                 }
 986                 psb->cur_iocbq.sli4_lxritag = lxri;
 987                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 988                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 989                 psb->fcp_bpl = psb->data;
 990                 psb->fcp_cmnd = (psb->data + sgl_size);
 991                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 992                                         sizeof(struct fcp_cmnd));
 993
 994                 /* Initialize local short-hand pointers. */
 995                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 996                 pdma_phys_bpl = psb->dma_handle;
 997                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
 998                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 999
1000                 /*
1001                  * The first two bdes are the FCP_CMD and FCP_RSP.
1002                  * The balance are sg list bdes. Initialize the
1003                  * first two and leave the rest for queuecommand.
1004                  */
1005                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
1006                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
1007                 sgl->word2 = le32_to_cpu(sgl->word2);
1008                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1009                 sgl->word2 = cpu_to_le32(sgl->word2);
1010                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
1011                 sgl++;
1012
1013                 /* Setup the physical region for the FCP RSP */
1014                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
1015                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
1016                 sgl->word2 = le32_to_cpu(sgl->word2);
1017                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1018                 sgl->word2 = cpu_to_le32(sgl->word2);
1019                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
1020
1021                 /*
1022                  * Since the IOCB for the FCP I/O is built into this
1023                  * lpfc_scsi_buf, initialize it with all known data now.
1024                  */
1025                 iocb = &psb->cur_iocbq.iocb;
1026                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
1027                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
1028                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
1029                  * We are setting the bpl to point to out sgl. An sgl's
1030                  * entries are 16 bytes, a bpl entries are 12 bytes.
1031                  */
1032                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
1033                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
1034                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
1035                 iocb->ulpBdeCount = 1;
1036                 iocb->ulpLe = 1;
1037                 iocb->ulpClass = CLASS3;
1038                 psb->cur_iocbq.context1 = psb;
1039                 psb->dma_phys_bpl = pdma_phys_bpl;
1040
1041                 /* add the scsi buffer to a post list */
1042                 list_add_tail(&psb->list, &post_sblist);
1043                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
1044                 phba->sli4_hba.scsi_xri_cnt++;
1045                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
1046         }
1047         lpfc_printf_log(phba, KERN_INFO, LOG_BG,
1048                         "3021 Allocate %d out of %d requested new SCSI "
1049                         "buffers\n", bcnt, num_to_alloc);
1050
1051         /* post the list of scsi buffer sgls to port if available */
1052         if (!list_empty(&post_sblist))
1053                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
1054                                                           &post_sblist, bcnt);
1055         else
1056                 num_posted = 0;
1057
1058         return num_posted;
1059 }
1060
1061 /**
1062  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
1063  * @vport: The virtual port for which this call being executed.
1064  * @num_to_allocate: The requested number of buffers to allocate.
1065  *
1066  * This routine wraps the actual SCSI buffer allocator function pointer from
1067  * the lpfc_hba struct.
1068  *
1069  * Return codes:
1070  *   int - number of scsi buffers that were allocated.
1071  *   0 = failure, less than num_to_alloc is a partial failure.
1072  **/
1073 static inline int
1074 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
1075 {
1076         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
1077 }
1078
1079 /**
1080  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1081  * @phba: The HBA for which this call is being executed.
1082  *
1083  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1084  * and returns to caller.
1085  *
1086  * Return codes:
1087  *   NULL - Error
1088  *   Pointer to lpfc_scsi_buf - Success
1089  **/
1090 static struct lpfc_scsi_buf*
1091 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1092 {
1093         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
1094         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
1095         unsigned long iflag = 0;
1096
1097         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1098         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
1099                          list);
1100         if (!lpfc_cmd) {
1101                 spin_lock(&phba->scsi_buf_list_put_lock);
1102                 list_splice(&phba->lpfc_scsi_buf_list_put,
1103                             &phba->lpfc_scsi_buf_list_get);
1104                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1105                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
1106                                  struct lpfc_scsi_buf, list);
1107                 spin_unlock(&phba->scsi_buf_list_put_lock);
1108         }
1109         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1110         return  lpfc_cmd;
1111 }
1112 /**
1113  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1114  * @phba: The HBA for which this call is being executed.
1115  *
1116  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1117  * and returns to caller.
1118  *
1119  * Return codes:
1120  *   NULL - Error
1121  *   Pointer to lpfc_scsi_buf - Success
1122  **/
1123 static struct lpfc_scsi_buf*
1124 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1125 {
1126         struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1127         unsigned long iflag = 0;
1128         int found = 0;
1129
1130         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1131         list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1132                                  &phba->lpfc_scsi_buf_list_get, list) {
1133                 if (lpfc_test_rrq_active(phba, ndlp,
1134                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1135                         continue;
1136                 list_del(&lpfc_cmd->list);
1137                 found = 1;
1138                 break;
1139         }
1140         if (!found) {
1141                 spin_lock(&phba->scsi_buf_list_put_lock);
1142                 list_splice(&phba->lpfc_scsi_buf_list_put,
1143                             &phba->lpfc_scsi_buf_list_get);
1144                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1145                 spin_unlock(&phba->scsi_buf_list_put_lock);
1146                 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1147                                          &phba->lpfc_scsi_buf_list_get, list) {
1148                         if (lpfc_test_rrq_active(
1149                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1150                                 continue;
1151                         list_del(&lpfc_cmd->list);
1152                         found = 1;
1153                         break;
1154                 }
1155         }
1156         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1157         if (!found)
1158                 return NULL;
1159         return  lpfc_cmd;
1160 }
1161 /**
1162  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1163  * @phba: The HBA for which this call is being executed.
1164  *
1165  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1166  * and returns to caller.
1167  *
1168  * Return codes:
1169  *   NULL - Error
1170  *   Pointer to lpfc_scsi_buf - Success
1171  **/
1172 static struct lpfc_scsi_buf*
1173 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1174 {
1175         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1176 }
1177
1178 /**
1179  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1180  * @phba: The Hba for which this call is being executed.
1181  * @psb: The scsi buffer which is being released.
1182  *
1183  * This routine releases @psb scsi buffer by adding it to tail of @phba
1184  * lpfc_scsi_buf_list list.
1185  **/
1186 static void
1187 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1188 {
1189         unsigned long iflag = 0;
1190
1191         psb->seg_cnt = 0;
1192         psb->nonsg_phys = 0;
1193         psb->prot_seg_cnt = 0;
1194
1195         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1196         psb->pCmd = NULL;
1197         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1198         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1199         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1200 }
1201
1202 /**
1203  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1204  * @phba: The Hba for which this call is being executed.
1205  * @psb: The scsi buffer which is being released.
1206  *
1207  * This routine releases @psb scsi buffer by adding it to tail of @phba
1208  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1209  * and cannot be reused for at least RA_TOV amount of time if it was
1210  * aborted.
1211  **/
1212 static void
1213 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1214 {
1215         unsigned long iflag = 0;
1216
1217         psb->seg_cnt = 0;
1218         psb->nonsg_phys = 0;
1219         psb->prot_seg_cnt = 0;
1220
1221         if (psb->exch_busy) {
1222                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1223                                         iflag);
1224                 psb->pCmd = NULL;
1225                 list_add_tail(&psb->list,
1226                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1227                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1228                                         iflag);
1229         } else {
1230                 psb->pCmd = NULL;
1231                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1232                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1233                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1234                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1235         }
1236 }
1237
1238 /**
1239  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1240  * @phba: The Hba for which this call is being executed.
1241  * @psb: The scsi buffer which is being released.
1242  *
1243  * This routine releases @psb scsi buffer by adding it to tail of @phba
1244  * lpfc_scsi_buf_list list.
1245  **/
1246 static void
1247 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1248 {
1249
1250         phba->lpfc_release_scsi_buf(phba, psb);
1251 }
1252
1253 /**
1254  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1255  * @phba: The Hba for which this call is being executed.
1256  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1257  *
1258  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1259  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1260  * through sg elements and format the bdea. This routine also initializes all
1261  * IOCB fields which are dependent on scsi command request buffer.
1262  *
1263  * Return codes:
1264  *   1 - Error
1265  *   0 - Success
1266  **/
1267 static int
1268 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1269 {
1270         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1271         struct scatterlist *sgel = NULL;
1272         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1273         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1274         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1275         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1276         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1277         dma_addr_t physaddr;
1278         uint32_t num_bde = 0;
1279         int nseg, datadir = scsi_cmnd->sc_data_direction;
1280
1281         /*
1282          * There are three possibilities here - use scatter-gather segment, use
1283          * the single mapping, or neither.  Start the lpfc command prep by
1284          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1285          * data bde entry.
1286          */
1287         bpl += 2;
1288         if (scsi_sg_count(scsi_cmnd)) {
1289                 /*
1290                  * The driver stores the segment count returned from pci_map_sg
1291                  * because this a count of dma-mappings used to map the use_sg
1292                  * pages.  They are not guaranteed to be the same for those
1293                  * architectures that implement an IOMMU.
1294                  */
1295
1296                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1297                                   scsi_sg_count(scsi_cmnd), datadir);
1298                 if (unlikely(!nseg))
1299                         return 1;
1300
1301                 lpfc_cmd->seg_cnt = nseg;
1302                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1303                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1304                                 "9064 BLKGRD: %s: Too many sg segments from "
1305                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1306                                __func__, phba->cfg_sg_seg_cnt,
1307                                lpfc_cmd->seg_cnt);
1308                         lpfc_cmd->seg_cnt = 0;
1309                         scsi_dma_unmap(scsi_cmnd);
1310                         return 1;
1311                 }
1312
1313                 /*
1314                  * The driver established a maximum scatter-gather segment count
1315                  * during probe that limits the number of sg elements in any
1316                  * single scsi command.  Just run through the seg_cnt and format
1317                  * the bde's.
1318                  * When using SLI-3 the driver will try to fit all the BDEs into
1319                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1320                  * does for SLI-2 mode.
1321                  */
1322                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1323                         physaddr = sg_dma_address(sgel);
1324                         if (phba->sli_rev == 3 &&
1325                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1326                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1327                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1328                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1329                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1330                                 data_bde->addrLow = putPaddrLow(physaddr);
1331                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1332                                 data_bde++;
1333                         } else {
1334                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1335                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1336                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1337                                 bpl->addrLow =
1338                                         le32_to_cpu(putPaddrLow(physaddr));
1339                                 bpl->addrHigh =
1340                                         le32_to_cpu(putPaddrHigh(physaddr));
1341                                 bpl++;
1342                         }
1343                 }
1344         }
1345
1346         /*
1347          * Finish initializing those IOCB fields that are dependent on the
1348          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1349          * explicitly reinitialized and for SLI-3 the extended bde count is
1350          * explicitly reinitialized since all iocb memory resources are reused.
1351          */
1352         if (phba->sli_rev == 3 &&
1353             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1354             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1355                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1356                         /*
1357                          * The extended IOCB format can only fit 3 BDE or a BPL.
1358                          * This I/O has more than 3 BDE so the 1st data bde will
1359                          * be a BPL that is filled in here.
1360                          */
1361                         physaddr = lpfc_cmd->dma_handle;
1362                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1363                         data_bde->tus.f.bdeSize = (num_bde *
1364                                                    sizeof(struct ulp_bde64));
1365                         physaddr += (sizeof(struct fcp_cmnd) +
1366                                      sizeof(struct fcp_rsp) +
1367                                      (2 * sizeof(struct ulp_bde64)));
1368                         data_bde->addrHigh = putPaddrHigh(physaddr);
1369                         data_bde->addrLow = putPaddrLow(physaddr);
1370                         /* ebde count includes the response bde and data bpl */
1371                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1372                 } else {
1373                         /* ebde count includes the response bde and data bdes */
1374                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1375                 }
1376         } else {
1377                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1378                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1379                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1380         }
1381         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1382
1383         /*
1384          * Due to difference in data length between DIF/non-DIF paths,
1385          * we need to set word 4 of IOCB here
1386          */
1387         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1388         return 0;
1389 }
1390
1391 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1392
1393 /* Return if if error injection is detected by Initiator */
1394 #define BG_ERR_INIT     0x1
1395 /* Return if if error injection is detected by Target */
1396 #define BG_ERR_TGT      0x2
1397 /* Return if if swapping CSUM<-->CRC is required for error injection */
1398 #define BG_ERR_SWAP     0x10
1399 /* Return if disabling Guard/Ref/App checking is required for error injection */
1400 #define BG_ERR_CHECK    0x20
1401
1402 /**
1403  * lpfc_bg_err_inject - Determine if we should inject an error
1404  * @phba: The Hba for which this call is being executed.
1405  * @sc: The SCSI command to examine
1406  * @reftag: (out) BlockGuard reference tag for transmitted data
1407  * @apptag: (out) BlockGuard application tag for transmitted data
1408  * @new_guard (in) Value to replace CRC with if needed
1409  *
1410  * Returns BG_ERR_* bit mask or 0 if request ignored
1411  **/
1412 static int
1413 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1414                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1415 {
1416         struct scatterlist *sgpe; /* s/g prot entry */
1417         struct scatterlist *sgde; /* s/g data entry */
1418         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1419         struct scsi_dif_tuple *src = NULL;
1420         struct lpfc_nodelist *ndlp;
1421         struct lpfc_rport_data *rdata;
1422         uint32_t op = scsi_get_prot_op(sc);
1423         uint32_t blksize;
1424         uint32_t numblks;
1425         sector_t lba;
1426         int rc = 0;
1427         int blockoff = 0;
1428
1429         if (op == SCSI_PROT_NORMAL)
1430                 return 0;
1431
1432         sgpe = scsi_prot_sglist(sc);
1433         sgde = scsi_sglist(sc);
1434         lba = scsi_get_lba(sc);
1435
1436         /* First check if we need to match the LBA */
1437         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1438                 blksize = lpfc_cmd_blksize(sc);
1439                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1440
1441                 /* Make sure we have the right LBA if one is specified */
1442                 if ((phba->lpfc_injerr_lba < lba) ||
1443                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1444                         return 0;
1445                 if (sgpe) {
1446                         blockoff = phba->lpfc_injerr_lba - lba;
1447                         numblks = sg_dma_len(sgpe) /
1448                                 sizeof(struct scsi_dif_tuple);
1449                         if (numblks < blockoff)
1450                                 blockoff = numblks;
1451                 }
1452         }
1453
1454         /* Next check if we need to match the remote NPortID or WWPN */
1455         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1456         if (rdata && rdata->pnode) {
1457                 ndlp = rdata->pnode;
1458
1459                 /* Make sure we have the right NPortID if one is specified */
1460                 if (phba->lpfc_injerr_nportid  &&
1461                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1462                         return 0;
1463
1464                 /*
1465                  * Make sure we have the right WWPN if one is specified.
1466                  * wwn[0] should be a non-zero NAA in a good WWPN.
1467                  */
1468                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1469                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1470                                 sizeof(struct lpfc_name)) != 0))
1471                         return 0;
1472         }
1473
1474         /* Setup a ptr to the protection data if the SCSI host provides it */
1475         if (sgpe) {
1476                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1477                 src += blockoff;
1478                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1479         }
1480
1481         /* Should we change the Reference Tag */
1482         if (reftag) {
1483                 if (phba->lpfc_injerr_wref_cnt) {
1484                         switch (op) {
1485                         case SCSI_PROT_WRITE_PASS:
1486                                 if (src) {
1487                                         /*
1488                                          * For WRITE_PASS, force the error
1489                                          * to be sent on the wire. It should
1490                                          * be detected by the Target.
1491                                          * If blockoff != 0 error will be
1492                                          * inserted in middle of the IO.
1493                                          */
1494
1495                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1496                                         "9076 BLKGRD: Injecting reftag error: "
1497                                         "write lba x%lx + x%x oldrefTag x%x\n",
1498                                         (unsigned long)lba, blockoff,
1499                                         be32_to_cpu(src->ref_tag));
1500
1501                                         /*
1502                                          * Save the old ref_tag so we can
1503                                          * restore it on completion.
1504                                          */
1505                                         if (lpfc_cmd) {
1506                                                 lpfc_cmd->prot_data_type =
1507                                                         LPFC_INJERR_REFTAG;
1508                                                 lpfc_cmd->prot_data_segment =
1509                                                         src;
1510                                                 lpfc_cmd->prot_data =
1511                                                         src->ref_tag;
1512                                         }
1513                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1514                                         phba->lpfc_injerr_wref_cnt--;
1515                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1516                                                 phba->lpfc_injerr_nportid = 0;
1517                                                 phba->lpfc_injerr_lba =
1518                                                         LPFC_INJERR_LBA_OFF;
1519                                                 memset(&phba->lpfc_injerr_wwpn,
1520                                                   0, sizeof(struct lpfc_name));
1521                                         }
1522                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1523
1524                                         break;
1525                                 }
1526                                 /* Drop thru */
1527                         case SCSI_PROT_WRITE_INSERT:
1528                                 /*
1529                                  * For WRITE_INSERT, force the error
1530                                  * to be sent on the wire. It should be
1531                                  * detected by the Target.
1532                                  */
1533                                 /* DEADBEEF will be the reftag on the wire */
1534                                 *reftag = 0xDEADBEEF;
1535                                 phba->lpfc_injerr_wref_cnt--;
1536                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1537                                         phba->lpfc_injerr_nportid = 0;
1538                                         phba->lpfc_injerr_lba =
1539                                         LPFC_INJERR_LBA_OFF;
1540                                         memset(&phba->lpfc_injerr_wwpn,
1541                                                 0, sizeof(struct lpfc_name));
1542                                 }
1543                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1544
1545                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1546                                         "9078 BLKGRD: Injecting reftag error: "
1547                                         "write lba x%lx\n", (unsigned long)lba);
1548                                 break;
1549                         case SCSI_PROT_WRITE_STRIP:
1550                                 /*
1551                                  * For WRITE_STRIP and WRITE_PASS,
1552                                  * force the error on data
1553                                  * being copied from SLI-Host to SLI-Port.
1554                                  */
1555                                 *reftag = 0xDEADBEEF;
1556                                 phba->lpfc_injerr_wref_cnt--;
1557                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1558                                         phba->lpfc_injerr_nportid = 0;
1559                                         phba->lpfc_injerr_lba =
1560                                                 LPFC_INJERR_LBA_OFF;
1561                                         memset(&phba->lpfc_injerr_wwpn,
1562                                                 0, sizeof(struct lpfc_name));
1563                                 }
1564                                 rc = BG_ERR_INIT;
1565
1566                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1567                                         "9077 BLKGRD: Injecting reftag error: "
1568                                         "write lba x%lx\n", (unsigned long)lba);
1569                                 break;
1570                         }
1571                 }
1572                 if (phba->lpfc_injerr_rref_cnt) {
1573                         switch (op) {
1574                         case SCSI_PROT_READ_INSERT:
1575                         case SCSI_PROT_READ_STRIP:
1576                         case SCSI_PROT_READ_PASS:
1577                                 /*
1578                                  * For READ_STRIP and READ_PASS, force the
1579                                  * error on data being read off the wire. It
1580                                  * should force an IO error to the driver.
1581                                  */
1582                                 *reftag = 0xDEADBEEF;
1583                                 phba->lpfc_injerr_rref_cnt--;
1584                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1585                                         phba->lpfc_injerr_nportid = 0;
1586                                         phba->lpfc_injerr_lba =
1587                                                 LPFC_INJERR_LBA_OFF;
1588                                         memset(&phba->lpfc_injerr_wwpn,
1589                                                 0, sizeof(struct lpfc_name));
1590                                 }
1591                                 rc = BG_ERR_INIT;
1592
1593                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1594                                         "9079 BLKGRD: Injecting reftag error: "
1595                                         "read lba x%lx\n", (unsigned long)lba);
1596                                 break;
1597                         }
1598                 }
1599         }
1600
1601         /* Should we change the Application Tag */
1602         if (apptag) {
1603                 if (phba->lpfc_injerr_wapp_cnt) {
1604                         switch (op) {
1605                         case SCSI_PROT_WRITE_PASS:
1606                                 if (src) {
1607                                         /*
1608                                          * For WRITE_PASS, force the error
1609                                          * to be sent on the wire. It should
1610                                          * be detected by the Target.
1611                                          * If blockoff != 0 error will be
1612                                          * inserted in middle of the IO.
1613                                          */
1614
1615                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1616                                         "9080 BLKGRD: Injecting apptag error: "
1617                                         "write lba x%lx + x%x oldappTag x%x\n",
1618                                         (unsigned long)lba, blockoff,
1619                                         be16_to_cpu(src->app_tag));
1620
1621                                         /*
1622                                          * Save the old app_tag so we can
1623                                          * restore it on completion.
1624                                          */
1625                                         if (lpfc_cmd) {
1626                                                 lpfc_cmd->prot_data_type =
1627                                                         LPFC_INJERR_APPTAG;
1628                                                 lpfc_cmd->prot_data_segment =
1629                                                         src;
1630                                                 lpfc_cmd->prot_data =
1631                                                         src->app_tag;
1632                                         }
1633                                         src->app_tag = cpu_to_be16(0xDEAD);
1634                                         phba->lpfc_injerr_wapp_cnt--;
1635                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1636                                                 phba->lpfc_injerr_nportid = 0;
1637                                                 phba->lpfc_injerr_lba =
1638                                                         LPFC_INJERR_LBA_OFF;
1639                                                 memset(&phba->lpfc_injerr_wwpn,
1640                                                   0, sizeof(struct lpfc_name));
1641                                         }
1642                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1643                                         break;
1644                                 }
1645                                 /* Drop thru */
1646                         case SCSI_PROT_WRITE_INSERT:
1647                                 /*
1648                                  * For WRITE_INSERT, force the
1649                                  * error to be sent on the wire. It should be
1650                                  * detected by the Target.
1651                                  */
1652                                 /* DEAD will be the apptag on the wire */
1653                                 *apptag = 0xDEAD;
1654                                 phba->lpfc_injerr_wapp_cnt--;
1655                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1656                                         phba->lpfc_injerr_nportid = 0;
1657                                         phba->lpfc_injerr_lba =
1658                                                 LPFC_INJERR_LBA_OFF;
1659                                         memset(&phba->lpfc_injerr_wwpn,
1660                                                 0, sizeof(struct lpfc_name));
1661                                 }
1662                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1663
1664                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1665                                         "0813 BLKGRD: Injecting apptag error: "
1666                                         "write lba x%lx\n", (unsigned long)lba);
1667                                 break;
1668                         case SCSI_PROT_WRITE_STRIP:
1669                                 /*
1670                                  * For WRITE_STRIP and WRITE_PASS,
1671                                  * force the error on data
1672                                  * being copied from SLI-Host to SLI-Port.
1673                                  */
1674                                 *apptag = 0xDEAD;
1675                                 phba->lpfc_injerr_wapp_cnt--;
1676                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1677                                         phba->lpfc_injerr_nportid = 0;
1678                                         phba->lpfc_injerr_lba =
1679                                                 LPFC_INJERR_LBA_OFF;
1680                                         memset(&phba->lpfc_injerr_wwpn,
1681                                                 0, sizeof(struct lpfc_name));
1682                                 }
1683                                 rc = BG_ERR_INIT;
1684
1685                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1686                                         "0812 BLKGRD: Injecting apptag error: "
1687                                         "write lba x%lx\n", (unsigned long)lba);
1688                                 break;
1689                         }
1690                 }
1691                 if (phba->lpfc_injerr_rapp_cnt) {
1692                         switch (op) {
1693                         case SCSI_PROT_READ_INSERT:
1694                         case SCSI_PROT_READ_STRIP:
1695                         case SCSI_PROT_READ_PASS:
1696                                 /*
1697                                  * For READ_STRIP and READ_PASS, force the
1698                                  * error on data being read off the wire. It
1699                                  * should force an IO error to the driver.
1700                                  */
1701                                 *apptag = 0xDEAD;
1702                                 phba->lpfc_injerr_rapp_cnt--;
1703                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1704                                         phba->lpfc_injerr_nportid = 0;
1705                                         phba->lpfc_injerr_lba =
1706                                                 LPFC_INJERR_LBA_OFF;
1707                                         memset(&phba->lpfc_injerr_wwpn,
1708                                                 0, sizeof(struct lpfc_name));
1709                                 }
1710                                 rc = BG_ERR_INIT;
1711
1712                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1713                                         "0814 BLKGRD: Injecting apptag error: "
1714                                         "read lba x%lx\n", (unsigned long)lba);
1715                                 break;
1716                         }
1717                 }
1718         }
1719
1720
1721         /* Should we change the Guard Tag */
1722         if (new_guard) {
1723                 if (phba->lpfc_injerr_wgrd_cnt) {
1724                         switch (op) {
1725                         case SCSI_PROT_WRITE_PASS:
1726                                 rc = BG_ERR_CHECK;
1727                                 /* Drop thru */
1728
1729                         case SCSI_PROT_WRITE_INSERT:
1730                                 /*
1731                                  * For WRITE_INSERT, force the
1732                                  * error to be sent on the wire. It should be
1733                                  * detected by the Target.
1734                                  */
1735                                 phba->lpfc_injerr_wgrd_cnt--;
1736                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1737                                         phba->lpfc_injerr_nportid = 0;
1738                                         phba->lpfc_injerr_lba =
1739                                                 LPFC_INJERR_LBA_OFF;
1740                                         memset(&phba->lpfc_injerr_wwpn,
1741                                                 0, sizeof(struct lpfc_name));
1742                                 }
1743
1744                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1745                                 /* Signals the caller to swap CRC->CSUM */
1746
1747                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1748                                         "0817 BLKGRD: Injecting guard error: "
1749                                         "write lba x%lx\n", (unsigned long)lba);
1750                                 break;
1751                         case SCSI_PROT_WRITE_STRIP:
1752                                 /*
1753                                  * For WRITE_STRIP and WRITE_PASS,
1754                                  * force the error on data
1755                                  * being copied from SLI-Host to SLI-Port.
1756                                  */
1757                                 phba->lpfc_injerr_wgrd_cnt--;
1758                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1759                                         phba->lpfc_injerr_nportid = 0;
1760                                         phba->lpfc_injerr_lba =
1761                                                 LPFC_INJERR_LBA_OFF;
1762                                         memset(&phba->lpfc_injerr_wwpn,
1763                                                 0, sizeof(struct lpfc_name));
1764                                 }
1765
1766                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1767                                 /* Signals the caller to swap CRC->CSUM */
1768
1769                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1770                                         "0816 BLKGRD: Injecting guard error: "
1771                                         "write lba x%lx\n", (unsigned long)lba);
1772                                 break;
1773                         }
1774                 }
1775                 if (phba->lpfc_injerr_rgrd_cnt) {
1776                         switch (op) {
1777                         case SCSI_PROT_READ_INSERT:
1778                         case SCSI_PROT_READ_STRIP:
1779                         case SCSI_PROT_READ_PASS:
1780                                 /*
1781                                  * For READ_STRIP and READ_PASS, force the
1782                                  * error on data being read off the wire. It
1783                                  * should force an IO error to the driver.
1784                                  */
1785                                 phba->lpfc_injerr_rgrd_cnt--;
1786                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1787                                         phba->lpfc_injerr_nportid = 0;
1788                                         phba->lpfc_injerr_lba =
1789                                                 LPFC_INJERR_LBA_OFF;
1790                                         memset(&phba->lpfc_injerr_wwpn,
1791                                                 0, sizeof(struct lpfc_name));
1792                                 }
1793
1794                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1795                                 /* Signals the caller to swap CRC->CSUM */
1796
1797                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1798                                         "0818 BLKGRD: Injecting guard error: "
1799                                         "read lba x%lx\n", (unsigned long)lba);
1800                         }
1801                 }
1802         }
1803
1804         return rc;
1805 }
1806 #endif
1807
1808 /**
1809  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1810  * the specified SCSI command.
1811  * @phba: The Hba for which this call is being executed.
1812  * @sc: The SCSI command to examine
1813  * @txopt: (out) BlockGuard operation for transmitted data
1814  * @rxopt: (out) BlockGuard operation for received data
1815  *
1816  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1817  *
1818  **/
1819 static int
1820 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1821                 uint8_t *txop, uint8_t *rxop)
1822 {
1823         uint8_t ret = 0;
1824
1825         if (lpfc_cmd_guard_csum(sc)) {
1826                 switch (scsi_get_prot_op(sc)) {
1827                 case SCSI_PROT_READ_INSERT:
1828                 case SCSI_PROT_WRITE_STRIP:
1829                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1830                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1831                         break;
1832
1833                 case SCSI_PROT_READ_STRIP:
1834                 case SCSI_PROT_WRITE_INSERT:
1835                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1836                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1837                         break;
1838
1839                 case SCSI_PROT_READ_PASS:
1840                 case SCSI_PROT_WRITE_PASS:
1841                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1842                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1843                         break;
1844
1845                 case SCSI_PROT_NORMAL:
1846                 default:
1847                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1848                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1849                                         scsi_get_prot_op(sc));
1850                         ret = 1;
1851                         break;
1852
1853                 }
1854         } else {
1855                 switch (scsi_get_prot_op(sc)) {
1856                 case SCSI_PROT_READ_STRIP:
1857                 case SCSI_PROT_WRITE_INSERT:
1858                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1859                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1860                         break;
1861
1862                 case SCSI_PROT_READ_PASS:
1863                 case SCSI_PROT_WRITE_PASS:
1864                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1865                         *txop = BG_OP_IN_CRC_OUT_CRC;
1866                         break;
1867
1868                 case SCSI_PROT_READ_INSERT:
1869                 case SCSI_PROT_WRITE_STRIP:
1870                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1871                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1872                         break;
1873
1874                 case SCSI_PROT_NORMAL:
1875                 default:
1876                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1877                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1878                                         scsi_get_prot_op(sc));
1879                         ret = 1;
1880                         break;
1881                 }
1882         }
1883
1884         return ret;
1885 }
1886
1887 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1888 /**
1889  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1890  * the specified SCSI command in order to force a guard tag error.
1891  * @phba: The Hba for which this call is being executed.
1892  * @sc: The SCSI command to examine
1893  * @txopt: (out) BlockGuard operation for transmitted data
1894  * @rxopt: (out) BlockGuard operation for received data
1895  *
1896  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1897  *
1898  **/
1899 static int
1900 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1901                 uint8_t *txop, uint8_t *rxop)
1902 {
1903         uint8_t ret = 0;
1904
1905         if (lpfc_cmd_guard_csum(sc)) {
1906                 switch (scsi_get_prot_op(sc)) {
1907                 case SCSI_PROT_READ_INSERT:
1908                 case SCSI_PROT_WRITE_STRIP:
1909                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1910                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1911                         break;
1912
1913                 case SCSI_PROT_READ_STRIP:
1914                 case SCSI_PROT_WRITE_INSERT:
1915                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1916                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1917                         break;
1918
1919                 case SCSI_PROT_READ_PASS:
1920                 case SCSI_PROT_WRITE_PASS:
1921                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1922                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1923                         break;
1924
1925                 case SCSI_PROT_NORMAL:
1926                 default:
1927                         break;
1928
1929                 }
1930         } else {
1931                 switch (scsi_get_prot_op(sc)) {
1932                 case SCSI_PROT_READ_STRIP:
1933                 case SCSI_PROT_WRITE_INSERT:
1934                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1935                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1936                         break;
1937
1938                 case SCSI_PROT_READ_PASS:
1939                 case SCSI_PROT_WRITE_PASS:
1940                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1941                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1942                         break;
1943
1944                 case SCSI_PROT_READ_INSERT:
1945                 case SCSI_PROT_WRITE_STRIP:
1946                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1947                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1948                         break;
1949
1950                 case SCSI_PROT_NORMAL:
1951                 default:
1952                         break;
1953                 }
1954         }
1955
1956         return ret;
1957 }
1958 #endif
1959
1960 /**
1961  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1962  * @phba: The Hba for which this call is being executed.
1963  * @sc: pointer to scsi command we're working on
1964  * @bpl: pointer to buffer list for protection groups
1965  * @datacnt: number of segments of data that have been dma mapped
1966  *
1967  * This function sets up BPL buffer list for protection groups of
1968  * type LPFC_PG_TYPE_NO_DIF
1969  *
1970  * This is usually used when the HBA is instructed to generate
1971  * DIFs and insert them into data stream (or strip DIF from
1972  * incoming data stream)
1973  *
1974  * The buffer list consists of just one protection group described
1975  * below:
1976  *                                +-------------------------+
1977  *   start of prot group  -->     |          PDE_5          |
1978  *                                +-------------------------+
1979  *                                |          PDE_6          |
1980  *                                +-------------------------+
1981  *                                |         Data BDE        |
1982  *                                +-------------------------+
1983  *                                |more Data BDE's ... (opt)|
1984  *                                +-------------------------+
1985  *
1986  *
1987  * Note: Data s/g buffers have been dma mapped
1988  *
1989  * Returns the number of BDEs added to the BPL.
1990  **/
1991 static int
1992 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1993                 struct ulp_bde64 *bpl, int datasegcnt)
1994 {
1995         struct scatterlist *sgde = NULL; /* s/g data entry */
1996         struct lpfc_pde5 *pde5 = NULL;
1997         struct lpfc_pde6 *pde6 = NULL;
1998         dma_addr_t physaddr;
1999         int i = 0, num_bde = 0, status;
2000         int datadir = sc->sc_data_direction;
2001 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2002         uint32_t rc;
2003 #endif
2004         uint32_t checking = 1;
2005         uint32_t reftag;
2006         unsigned blksize;
2007         uint8_t txop, rxop;
2008
2009         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2010         if (status)
2011                 goto out;
2012
2013         /* extract some info from the scsi command for pde*/
2014         blksize = lpfc_cmd_blksize(sc);
2015         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2016
2017 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2018         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2019         if (rc) {
2020                 if (rc & BG_ERR_SWAP)
2021                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2022                 if (rc & BG_ERR_CHECK)
2023                         checking = 0;
2024         }
2025 #endif
2026
2027         /* setup PDE5 with what we have */
2028         pde5 = (struct lpfc_pde5 *) bpl;
2029         memset(pde5, 0, sizeof(struct lpfc_pde5));
2030         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2031
2032         /* Endianness conversion if necessary for PDE5 */
2033         pde5->word0 = cpu_to_le32(pde5->word0);
2034         pde5->reftag = cpu_to_le32(reftag);
2035
2036         /* advance bpl and increment bde count */
2037         num_bde++;
2038         bpl++;
2039         pde6 = (struct lpfc_pde6 *) bpl;
2040
2041         /* setup PDE6 with the rest of the info */
2042         memset(pde6, 0, sizeof(struct lpfc_pde6));
2043         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2044         bf_set(pde6_optx, pde6, txop);
2045         bf_set(pde6_oprx, pde6, rxop);
2046
2047         /*
2048          * We only need to check the data on READs, for WRITEs
2049          * protection data is automatically generated, not checked.
2050          */
2051         if (datadir == DMA_FROM_DEVICE) {
2052                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2053                         bf_set(pde6_ce, pde6, checking);
2054                 else
2055                         bf_set(pde6_ce, pde6, 0);
2056
2057                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2058                         bf_set(pde6_re, pde6, checking);
2059                 else
2060                         bf_set(pde6_re, pde6, 0);
2061         }
2062         bf_set(pde6_ai, pde6, 1);
2063         bf_set(pde6_ae, pde6, 0);
2064         bf_set(pde6_apptagval, pde6, 0);
2065
2066         /* Endianness conversion if necessary for PDE6 */
2067         pde6->word0 = cpu_to_le32(pde6->word0);
2068         pde6->word1 = cpu_to_le32(pde6->word1);
2069         pde6->word2 = cpu_to_le32(pde6->word2);
2070
2071         /* advance bpl and increment bde count */
2072         num_bde++;
2073         bpl++;
2074
2075         /* assumption: caller has already run dma_map_sg on command data */
2076         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2077                 physaddr = sg_dma_address(sgde);
2078                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
2079                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
2080                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
2081                 if (datadir == DMA_TO_DEVICE)
2082                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2083                 else
2084                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2085                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
2086                 bpl++;
2087                 num_bde++;
2088         }
2089
2090 out:
2091         return num_bde;
2092 }
2093
2094 /**
2095  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
2096  * @phba: The Hba for which this call is being executed.
2097  * @sc: pointer to scsi command we're working on
2098  * @bpl: pointer to buffer list for protection groups
2099  * @datacnt: number of segments of data that have been dma mapped
2100  * @protcnt: number of segment of protection data that have been dma mapped
2101  *
2102  * This function sets up BPL buffer list for protection groups of
2103  * type LPFC_PG_TYPE_DIF
2104  *
2105  * This is usually used when DIFs are in their own buffers,
2106  * separate from the data. The HBA can then by instructed
2107  * to place the DIFs in the outgoing stream.  For read operations,
2108  * The HBA could extract the DIFs and place it in DIF buffers.
2109  *
2110  * The buffer list for this type consists of one or more of the
2111  * protection groups described below:
2112  *                                    +-------------------------+
2113  *   start of first prot group  -->   |          PDE_5          |
2114  *                                    +-------------------------+
2115  *                                    |          PDE_6          |
2116  *                                    +-------------------------+
2117  *                                    |      PDE_7 (Prot BDE)   |
2118  *                                    +-------------------------+
2119  *                                    |        Data BDE         |
2120  *                                    +-------------------------+
2121  *                                    |more Data BDE's ... (opt)|
2122  *                                    +-------------------------+
2123  *   start of new  prot group  -->    |          PDE_5          |
2124  *                                    +-------------------------+
2125  *                                    |          ...            |
2126  *                                    +-------------------------+
2127  *
2128  * Note: It is assumed that both data and protection s/g buffers have been
2129  *       mapped for DMA
2130  *
2131  * Returns the number of BDEs added to the BPL.
2132  **/
2133 static int
2134 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2135                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2136 {
2137         struct scatterlist *sgde = NULL; /* s/g data entry */
2138         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2139         struct lpfc_pde5 *pde5 = NULL;
2140         struct lpfc_pde6 *pde6 = NULL;
2141         struct lpfc_pde7 *pde7 = NULL;
2142         dma_addr_t dataphysaddr, protphysaddr;
2143         unsigned short curr_data = 0, curr_prot = 0;
2144         unsigned int split_offset;
2145         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2146         unsigned int protgrp_blks, protgrp_bytes;
2147         unsigned int remainder, subtotal;
2148         int status;
2149         int datadir = sc->sc_data_direction;
2150         unsigned char pgdone = 0, alldone = 0;
2151         unsigned blksize;
2152 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2153         uint32_t rc;
2154 #endif
2155         uint32_t checking = 1;
2156         uint32_t reftag;
2157         uint8_t txop, rxop;
2158         int num_bde = 0;
2159
2160         sgpe = scsi_prot_sglist(sc);
2161         sgde = scsi_sglist(sc);
2162
2163         if (!sgpe || !sgde) {
2164                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2165                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2166                                 sgpe, sgde);
2167                 return 0;
2168         }
2169
2170         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2171         if (status)
2172                 goto out;
2173
2174         /* extract some info from the scsi command */
2175         blksize = lpfc_cmd_blksize(sc);
2176         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2177
2178 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2179         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2180         if (rc) {
2181                 if (rc & BG_ERR_SWAP)
2182                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2183                 if (rc & BG_ERR_CHECK)
2184                         checking = 0;
2185         }
2186 #endif
2187
2188         split_offset = 0;
2189         do {
2190                 /* Check to see if we ran out of space */
2191                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2192                         return num_bde + 3;
2193
2194                 /* setup PDE5 with what we have */
2195                 pde5 = (struct lpfc_pde5 *) bpl;
2196                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2197                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2198
2199                 /* Endianness conversion if necessary for PDE5 */
2200                 pde5->word0 = cpu_to_le32(pde5->word0);
2201                 pde5->reftag = cpu_to_le32(reftag);
2202
2203                 /* advance bpl and increment bde count */
2204                 num_bde++;
2205                 bpl++;
2206                 pde6 = (struct lpfc_pde6 *) bpl;
2207
2208                 /* setup PDE6 with the rest of the info */
2209                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2210                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2211                 bf_set(pde6_optx, pde6, txop);
2212                 bf_set(pde6_oprx, pde6, rxop);
2213
2214                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2215                         bf_set(pde6_ce, pde6, checking);
2216                 else
2217                         bf_set(pde6_ce, pde6, 0);
2218
2219                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2220                         bf_set(pde6_re, pde6, checking);
2221                 else
2222                         bf_set(pde6_re, pde6, 0);
2223
2224                 bf_set(pde6_ai, pde6, 1);
2225                 bf_set(pde6_ae, pde6, 0);
2226                 bf_set(pde6_apptagval, pde6, 0);
2227
2228                 /* Endianness conversion if necessary for PDE6 */
2229                 pde6->word0 = cpu_to_le32(pde6->word0);
2230                 pde6->word1 = cpu_to_le32(pde6->word1);
2231                 pde6->word2 = cpu_to_le32(pde6->word2);
2232
2233                 /* advance bpl and increment bde count */
2234                 num_bde++;
2235                 bpl++;
2236
2237                 /* setup the first BDE that points to protection buffer */
2238                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2239                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2240
2241                 /* must be integer multiple of the DIF block length */
2242                 BUG_ON(protgroup_len % 8);
2243
2244                 pde7 = (struct lpfc_pde7 *) bpl;
2245                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2246                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2247
2248                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2249                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2250
2251                 protgrp_blks = protgroup_len / 8;
2252                 protgrp_bytes = protgrp_blks * blksize;
2253
2254                 /* check if this pde is crossing the 4K boundary; if so split */
2255                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2256                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2257                         protgroup_offset += protgroup_remainder;
2258                         protgrp_blks = protgroup_remainder / 8;
2259                         protgrp_bytes = protgrp_blks * blksize;
2260                 } else {
2261                         protgroup_offset = 0;
2262                         curr_prot++;
2263                 }
2264
2265                 num_bde++;
2266
2267                 /* setup BDE's for data blocks associated with DIF data */
2268                 pgdone = 0;
2269                 subtotal = 0; /* total bytes processed for current prot grp */
2270                 while (!pgdone) {
2271                         /* Check to see if we ran out of space */
2272                         if (num_bde >= phba->cfg_total_seg_cnt)
2273                                 return num_bde + 1;
2274
2275                         if (!sgde) {
2276                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2277                                         "9065 BLKGRD:%s Invalid data segment\n",
2278                                                 __func__);
2279                                 return 0;
2280                         }
2281                         bpl++;
2282                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2283                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2284                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2285
2286                         remainder = sg_dma_len(sgde) - split_offset;
2287
2288                         if ((subtotal + remainder) <= protgrp_bytes) {
2289                                 /* we can use this whole buffer */
2290                                 bpl->tus.f.bdeSize = remainder;
2291                                 split_offset = 0;
2292
2293                                 if ((subtotal + remainder) == protgrp_bytes)
2294                                         pgdone = 1;
2295                         } else {
2296                                 /* must split this buffer with next prot grp */
2297                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2298                                 split_offset += bpl->tus.f.bdeSize;
2299                         }
2300
2301                         subtotal += bpl->tus.f.bdeSize;
2302
2303                         if (datadir == DMA_TO_DEVICE)
2304                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2305                         else
2306                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2307                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2308
2309                         num_bde++;
2310                         curr_data++;
2311
2312                         if (split_offset)
2313                                 break;
2314
2315                         /* Move to the next s/g segment if possible */
2316                         sgde = sg_next(sgde);
2317
2318                 }
2319
2320                 if (protgroup_offset) {
2321                         /* update the reference tag */
2322                         reftag += protgrp_blks;
2323                         bpl++;
2324                         continue;
2325                 }
2326
2327                 /* are we done ? */
2328                 if (curr_prot == protcnt) {
2329                         alldone = 1;
2330                 } else if (curr_prot < protcnt) {
2331                         /* advance to next prot buffer */
2332                         sgpe = sg_next(sgpe);
2333                         bpl++;
2334
2335                         /* update the reference tag */
2336                         reftag += protgrp_blks;
2337                 } else {
2338                         /* if we're here, we have a bug */
2339                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2340                                 "9054 BLKGRD: bug in %s\n", __func__);
2341                 }
2342
2343         } while (!alldone);
2344 out:
2345
2346         return num_bde;
2347 }
2348
2349 /**
2350  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2351  * @phba: The Hba for which this call is being executed.
2352  * @sc: pointer to scsi command we're working on
2353  * @sgl: pointer to buffer list for protection groups
2354  * @datacnt: number of segments of data that have been dma mapped
2355  *
2356  * This function sets up SGL buffer list for protection groups of
2357  * type LPFC_PG_TYPE_NO_DIF
2358  *
2359  * This is usually used when the HBA is instructed to generate
2360  * DIFs and insert them into data stream (or strip DIF from
2361  * incoming data stream)
2362  *
2363  * The buffer list consists of just one protection group described
2364  * below:
2365  *                                +-------------------------+
2366  *   start of prot group  -->     |         DI_SEED         |
2367  *                                +-------------------------+
2368  *                                |         Data SGE        |
2369  *                                +-------------------------+
2370  *                                |more Data SGE's ... (opt)|
2371  *                                +-------------------------+
2372  *
2373  *
2374  * Note: Data s/g buffers have been dma mapped
2375  *
2376  * Returns the number of SGEs added to the SGL.
2377  **/
2378 static int
2379 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2380                 struct sli4_sge *sgl, int datasegcnt)
2381 {
2382         struct scatterlist *sgde = NULL; /* s/g data entry */
2383         struct sli4_sge_diseed *diseed = NULL;
2384         dma_addr_t physaddr;
2385         int i = 0, num_sge = 0, status;
2386         uint32_t reftag;
2387         unsigned blksize;
2388         uint8_t txop, rxop;
2389 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2390         uint32_t rc;
2391 #endif
2392         uint32_t checking = 1;
2393         uint32_t dma_len;
2394         uint32_t dma_offset = 0;
2395
2396         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2397         if (status)
2398                 goto out;
2399
2400         /* extract some info from the scsi command for pde*/
2401         blksize = lpfc_cmd_blksize(sc);
2402         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2403
2404 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2405         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2406         if (rc) {
2407                 if (rc & BG_ERR_SWAP)
2408                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2409                 if (rc & BG_ERR_CHECK)
2410                         checking = 0;
2411         }
2412 #endif
2413
2414         /* setup DISEED with what we have */
2415         diseed = (struct sli4_sge_diseed *) sgl;
2416         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2417         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2418
2419         /* Endianness conversion if necessary */
2420         diseed->ref_tag = cpu_to_le32(reftag);
2421         diseed->ref_tag_tran = diseed->ref_tag;
2422
2423         /*
2424          * We only need to check the data on READs, for WRITEs
2425          * protection data is automatically generated, not checked.
2426          */
2427         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2428                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2429                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2430                 else
2431                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2432
2433                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2434                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2435                 else
2436                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2437         }
2438
2439         /* setup DISEED with the rest of the info */
2440         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2441         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2442
2443         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2444         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2445
2446         /* Endianness conversion if necessary for DISEED */
2447         diseed->word2 = cpu_to_le32(diseed->word2);
2448         diseed->word3 = cpu_to_le32(diseed->word3);
2449
2450         /* advance bpl and increment sge count */
2451         num_sge++;
2452         sgl++;
2453
2454         /* assumption: caller has already run dma_map_sg on command data */
2455         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2456                 physaddr = sg_dma_address(sgde);
2457                 dma_len = sg_dma_len(sgde);
2458                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2459                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2460                 if ((i + 1) == datasegcnt)
2461                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2462                 else
2463                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2464                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2465                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2466
2467                 sgl->sge_len = cpu_to_le32(dma_len);
2468                 dma_offset += dma_len;
2469
2470                 sgl++;
2471                 num_sge++;
2472         }
2473
2474 out:
2475         return num_sge;
2476 }
2477
2478 /**
2479  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2480  * @phba: The Hba for which this call is being executed.
2481  * @sc: pointer to scsi command we're working on
2482  * @sgl: pointer to buffer list for protection groups
2483  * @datacnt: number of segments of data that have been dma mapped
2484  * @protcnt: number of segment of protection data that have been dma mapped
2485  *
2486  * This function sets up SGL buffer list for protection groups of
2487  * type LPFC_PG_TYPE_DIF
2488  *
2489  * This is usually used when DIFs are in their own buffers,
2490  * separate from the data. The HBA can then by instructed
2491  * to place the DIFs in the outgoing stream.  For read operations,
2492  * The HBA could extract the DIFs and place it in DIF buffers.
2493  *
2494  * The buffer list for this type consists of one or more of the
2495  * protection groups described below:
2496  *                                    +-------------------------+
2497  *   start of first prot group  -->   |         DISEED          |
2498  *                                    +-------------------------+
2499  *                                    |      DIF (Prot SGE)     |
2500  *                                    +-------------------------+
2501  *                                    |        Data SGE         |
2502  *                                    +-------------------------+
2503  *                                    |more Data SGE's ... (opt)|
2504  *                                    +-------------------------+
2505  *   start of new  prot group  -->    |         DISEED          |
2506  *                                    +-------------------------+
2507  *                                    |          ...            |
2508  *                                    +-------------------------+
2509  *
2510  * Note: It is assumed that both data and protection s/g buffers have been
2511  *       mapped for DMA
2512  *
2513  * Returns the number of SGEs added to the SGL.
2514  **/
2515 static int
2516 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2517                 struct sli4_sge *sgl, int datacnt, int protcnt)
2518 {
2519         struct scatterlist *sgde = NULL; /* s/g data entry */
2520         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2521         struct sli4_sge_diseed *diseed = NULL;
2522         dma_addr_t dataphysaddr, protphysaddr;
2523         unsigned short curr_data = 0, curr_prot = 0;
2524         unsigned int split_offset;
2525         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2526         unsigned int protgrp_blks, protgrp_bytes;
2527         unsigned int remainder, subtotal;
2528         int status;
2529         unsigned char pgdone = 0, alldone = 0;
2530         unsigned blksize;
2531         uint32_t reftag;
2532         uint8_t txop, rxop;
2533         uint32_t dma_len;
2534 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2535         uint32_t rc;
2536 #endif
2537         uint32_t checking = 1;
2538         uint32_t dma_offset = 0;
2539         int num_sge = 0;
2540
2541         sgpe = scsi_prot_sglist(sc);
2542         sgde = scsi_sglist(sc);
2543
2544         if (!sgpe || !sgde) {
2545                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2546                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2547                                 sgpe, sgde);
2548                 return 0;
2549         }
2550
2551         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2552         if (status)
2553                 goto out;
2554
2555         /* extract some info from the scsi command */
2556         blksize = lpfc_cmd_blksize(sc);
2557         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2558
2559 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2560         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2561         if (rc) {
2562                 if (rc & BG_ERR_SWAP)
2563                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2564                 if (rc & BG_ERR_CHECK)
2565                         checking = 0;
2566         }
2567 #endif
2568
2569         split_offset = 0;
2570         do {
2571                 /* Check to see if we ran out of space */
2572                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2573                         return num_sge + 3;
2574
2575                 /* setup DISEED with what we have */
2576                 diseed = (struct sli4_sge_diseed *) sgl;
2577                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2578                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2579
2580                 /* Endianness conversion if necessary */
2581                 diseed->ref_tag = cpu_to_le32(reftag);
2582                 diseed->ref_tag_tran = diseed->ref_tag;
2583
2584                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2585                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2586
2587                 } else {
2588                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2589                         /*
2590                          * When in this mode, the hardware will replace
2591                          * the guard tag from the host with a
2592                          * newly generated good CRC for the wire.
2593                          * Switch to raw mode here to avoid this
2594                          * behavior. What the host sends gets put on the wire.
2595                          */
2596                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2597                                 txop = BG_OP_RAW_MODE;
2598                                 rxop = BG_OP_RAW_MODE;
2599                         }
2600                 }
2601
2602
2603                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2604                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2605                 else
2606                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2607
2608                 /* setup DISEED with the rest of the info */
2609                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2610                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2611
2612                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2613                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2614
2615                 /* Endianness conversion if necessary for DISEED */
2616                 diseed->word2 = cpu_to_le32(diseed->word2);
2617                 diseed->word3 = cpu_to_le32(diseed->word3);
2618
2619                 /* advance sgl and increment bde count */
2620                 num_sge++;
2621                 sgl++;
2622
2623                 /* setup the first BDE that points to protection buffer */
2624                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2625                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2626
2627                 /* must be integer multiple of the DIF block length */
2628                 BUG_ON(protgroup_len % 8);
2629
2630                 /* Now setup DIF SGE */
2631                 sgl->word2 = 0;
2632                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2633                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2634                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2635                 sgl->word2 = cpu_to_le32(sgl->word2);
2636
2637                 protgrp_blks = protgroup_len / 8;
2638                 protgrp_bytes = protgrp_blks * blksize;
2639
2640                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2641                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2642                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2643                         protgroup_offset += protgroup_remainder;
2644                         protgrp_blks = protgroup_remainder / 8;
2645                         protgrp_bytes = protgrp_blks * blksize;
2646                 } else {
2647                         protgroup_offset = 0;
2648                         curr_prot++;
2649                 }
2650
2651                 num_sge++;
2652
2653                 /* setup SGE's for data blocks associated with DIF data */
2654                 pgdone = 0;
2655                 subtotal = 0; /* total bytes processed for current prot grp */
2656                 while (!pgdone) {
2657                         /* Check to see if we ran out of space */
2658                         if (num_sge >= phba->cfg_total_seg_cnt)
2659                                 return num_sge + 1;
2660
2661                         if (!sgde) {
2662                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2663                                         "9086 BLKGRD:%s Invalid data segment\n",
2664                                                 __func__);
2665                                 return 0;
2666                         }
2667                         sgl++;
2668                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2669
2670                         remainder = sg_dma_len(sgde) - split_offset;
2671
2672                         if ((subtotal + remainder) <= protgrp_bytes) {
2673                                 /* we can use this whole buffer */
2674                                 dma_len = remainder;
2675                                 split_offset = 0;
2676
2677                                 if ((subtotal + remainder) == protgrp_bytes)
2678                                         pgdone = 1;
2679                         } else {
2680                                 /* must split this buffer with next prot grp */
2681                                 dma_len = protgrp_bytes - subtotal;
2682                                 split_offset += dma_len;
2683                         }
2684
2685                         subtotal += dma_len;
2686
2687                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2688                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2689                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2690                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2691                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2692
2693                         sgl->sge_len = cpu_to_le32(dma_len);
2694                         dma_offset += dma_len;
2695
2696                         num_sge++;
2697                         curr_data++;
2698
2699                         if (split_offset)
2700                                 break;
2701
2702                         /* Move to the next s/g segment if possible */
2703                         sgde = sg_next(sgde);
2704                 }
2705
2706                 if (protgroup_offset) {
2707                         /* update the reference tag */
2708                         reftag += protgrp_blks;
2709                         sgl++;
2710                         continue;
2711                 }
2712
2713                 /* are we done ? */
2714                 if (curr_prot == protcnt) {
2715                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2716                         alldone = 1;
2717                 } else if (curr_prot < protcnt) {
2718                         /* advance to next prot buffer */
2719                         sgpe = sg_next(sgpe);
2720                         sgl++;
2721
2722                         /* update the reference tag */
2723                         reftag += protgrp_blks;
2724                 } else {
2725                         /* if we're here, we have a bug */
2726                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2727                                 "9085 BLKGRD: bug in %s\n", __func__);
2728                 }
2729
2730         } while (!alldone);
2731
2732 out:
2733
2734         return num_sge;
2735 }
2736
2737 /**
2738  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2739  * @phba: The Hba for which this call is being executed.
2740  * @sc: pointer to scsi command we're working on
2741  *
2742  * Given a SCSI command that supports DIF, determine composition of protection
2743  * groups involved in setting up buffer lists
2744  *
2745  * Returns: Protection group type (with or without DIF)
2746  *
2747  **/
2748 static int
2749 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2750 {
2751         int ret = LPFC_PG_TYPE_INVALID;
2752         unsigned char op = scsi_get_prot_op(sc);
2753
2754         switch (op) {
2755         case SCSI_PROT_READ_STRIP:
2756         case SCSI_PROT_WRITE_INSERT:
2757                 ret = LPFC_PG_TYPE_NO_DIF;
2758                 break;
2759         case SCSI_PROT_READ_INSERT:
2760         case SCSI_PROT_WRITE_STRIP:
2761         case SCSI_PROT_READ_PASS:
2762         case SCSI_PROT_WRITE_PASS:
2763                 ret = LPFC_PG_TYPE_DIF_BUF;
2764                 break;
2765         default:
2766                 if (phba)
2767                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2768                                         "9021 Unsupported protection op:%d\n",
2769                                         op);
2770                 break;
2771         }
2772         return ret;
2773 }
2774
2775 /**
2776  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2777  * @phba: The Hba for which this call is being executed.
2778  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2779  *
2780  * Adjust the data length to account for how much data
2781  * is actually on the wire.
2782  *
2783  * returns the adjusted data length
2784  **/
2785 static int
2786 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2787                        struct lpfc_scsi_buf *lpfc_cmd)
2788 {
2789         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2790         int fcpdl;
2791
2792         fcpdl = scsi_bufflen(sc);
2793
2794         /* Check if there is protection data on the wire */
2795         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2796                 /* Read check for protection data */
2797                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2798                         return fcpdl;
2799
2800         } else {
2801                 /* Write check for protection data */
2802                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2803                         return fcpdl;
2804         }
2805
2806         /*
2807          * If we are in DIF Type 1 mode every data block has a 8 byte
2808          * DIF (trailer) attached to it. Must ajust FCP data length
2809          * to account for the protection data.
2810          */
2811         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2812
2813         return fcpdl;
2814 }
2815
2816 /**
2817  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2818  * @phba: The Hba for which this call is being executed.
2819  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2820  *
2821  * This is the protection/DIF aware version of
2822  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2823  * two functions eventually, but for now, it's here
2824  **/
2825 static int
2826 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2827                 struct lpfc_scsi_buf *lpfc_cmd)
2828 {
2829         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2830         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2831         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2832         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2833         uint32_t num_bde = 0;
2834         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2835         int prot_group_type = 0;
2836         int fcpdl;
2837
2838         /*
2839          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2840          *  fcp_rsp regions to the first data bde entry
2841          */
2842         bpl += 2;
2843         if (scsi_sg_count(scsi_cmnd)) {
2844                 /*
2845                  * The driver stores the segment count returned from pci_map_sg
2846                  * because this a count of dma-mappings used to map the use_sg
2847                  * pages.  They are not guaranteed to be the same for those
2848                  * architectures that implement an IOMMU.
2849                  */
2850                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2851                                         scsi_sglist(scsi_cmnd),
2852                                         scsi_sg_count(scsi_cmnd), datadir);
2853                 if (unlikely(!datasegcnt))
2854                         return 1;
2855
2856                 lpfc_cmd->seg_cnt = datasegcnt;
2857
2858                 /* First check if data segment count from SCSI Layer is good */
2859                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2860                         goto err;
2861
2862                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2863
2864                 switch (prot_group_type) {
2865                 case LPFC_PG_TYPE_NO_DIF:
2866
2867                         /* Here we need to add a PDE5 and PDE6 to the count */
2868                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2869                                 goto err;
2870
2871                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2872                                         datasegcnt);
2873                         /* we should have 2 or more entries in buffer list */
2874                         if (num_bde < 2)
2875                                 goto err;
2876                         break;
2877
2878                 case LPFC_PG_TYPE_DIF_BUF:
2879                         /*
2880                          * This type indicates that protection buffers are
2881                          * passed to the driver, so that needs to be prepared
2882                          * for DMA
2883                          */
2884                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2885                                         scsi_prot_sglist(scsi_cmnd),
2886                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2887                         if (unlikely(!protsegcnt)) {
2888                                 scsi_dma_unmap(scsi_cmnd);
2889                                 return 1;
2890                         }
2891
2892                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2893
2894                         /*
2895                          * There is a minimun of 4 BPLs used for every
2896                          * protection data segment.
2897                          */
2898                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2899                             (phba->cfg_total_seg_cnt - 2))
2900                                 goto err;
2901
2902                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2903                                         datasegcnt, protsegcnt);
2904                         /* we should have 3 or more entries in buffer list */
2905                         if ((num_bde < 3) ||
2906                             (num_bde > phba->cfg_total_seg_cnt))
2907                                 goto err;
2908                         break;
2909
2910                 case LPFC_PG_TYPE_INVALID:
2911                 default:
2912                         scsi_dma_unmap(scsi_cmnd);
2913                         lpfc_cmd->seg_cnt = 0;
2914
2915                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2916                                         "9022 Unexpected protection group %i\n",
2917                                         prot_group_type);
2918                         return 1;
2919                 }
2920         }
2921
2922         /*
2923          * Finish initializing those IOCB fields that are dependent on the
2924          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2925          * reinitialized since all iocb memory resources are used many times
2926          * for transmit, receive, and continuation bpl's.
2927          */
2928         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2929         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2930         iocb_cmd->ulpBdeCount = 1;
2931         iocb_cmd->ulpLe = 1;
2932
2933         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2934         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2935
2936         /*
2937          * Due to difference in data length between DIF/non-DIF paths,
2938          * we need to set word 4 of IOCB here
2939          */
2940         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2941
2942         return 0;
2943 err:
2944         if (lpfc_cmd->seg_cnt)
2945                 scsi_dma_unmap(scsi_cmnd);
2946         if (lpfc_cmd->prot_seg_cnt)
2947                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2948                              scsi_prot_sg_count(scsi_cmnd),
2949                              scsi_cmnd->sc_data_direction);
2950
2951         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2952                         "9023 Cannot setup S/G List for HBA"
2953                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2954                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2955                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2956                         prot_group_type, num_bde);
2957
2958         lpfc_cmd->seg_cnt = 0;
2959         lpfc_cmd->prot_seg_cnt = 0;
2960         return 1;
2961 }
2962
2963 /*
2964  * This function calcuates the T10 DIF guard tag
2965  * on the specified data using a CRC algorithmn
2966  * using crc_t10dif.
2967  */
2968 uint16_t
2969 lpfc_bg_crc(uint8_t *data, int count)
2970 {
2971         uint16_t crc = 0;
2972         uint16_t x;
2973
2974         crc = crc_t10dif(data, count);
2975         x = cpu_to_be16(crc);
2976         return x;
2977 }
2978
2979 /*
2980  * This function calcuates the T10 DIF guard tag
2981  * on the specified data using a CSUM algorithmn
2982  * using ip_compute_csum.
2983  */
2984 uint16_t
2985 lpfc_bg_csum(uint8_t *data, int count)
2986 {
2987         uint16_t ret;
2988
2989         ret = ip_compute_csum(data, count);
2990         return ret;
2991 }
2992
2993 /*
2994  * This function examines the protection data to try to determine
2995  * what type of T10-DIF error occurred.
2996  */
2997 void
2998 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2999 {
3000         struct scatterlist *sgpe; /* s/g prot entry */
3001         struct scatterlist *sgde; /* s/g data entry */
3002         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3003         struct scsi_dif_tuple *src = NULL;
3004         uint8_t *data_src = NULL;
3005         uint16_t guard_tag, guard_type;
3006         uint16_t start_app_tag, app_tag;
3007         uint32_t start_ref_tag, ref_tag;
3008         int prot, protsegcnt;
3009         int err_type, len, data_len;
3010         int chk_ref, chk_app, chk_guard;
3011         uint16_t sum;
3012         unsigned blksize;
3013
3014         err_type = BGS_GUARD_ERR_MASK;
3015         sum = 0;
3016         guard_tag = 0;
3017
3018         /* First check to see if there is protection data to examine */
3019         prot = scsi_get_prot_op(cmd);
3020         if ((prot == SCSI_PROT_READ_STRIP) ||
3021             (prot == SCSI_PROT_WRITE_INSERT) ||
3022             (prot == SCSI_PROT_NORMAL))
3023                 goto out;
3024
3025         /* Currently the driver just supports ref_tag and guard_tag checking */
3026         chk_ref = 1;
3027         chk_app = 0;
3028         chk_guard = 0;
3029
3030         /* Setup a ptr to the protection data provided by the SCSI host */
3031         sgpe = scsi_prot_sglist(cmd);
3032         protsegcnt = lpfc_cmd->prot_seg_cnt;
3033
3034         if (sgpe && protsegcnt) {
3035
3036                 /*
3037                  * We will only try to verify guard tag if the segment
3038                  * data length is a multiple of the blksize.
3039                  */
3040                 sgde = scsi_sglist(cmd);
3041                 blksize = lpfc_cmd_blksize(cmd);
3042                 data_src = (uint8_t *)sg_virt(sgde);
3043                 data_len = sgde->length;
3044                 if ((data_len & (blksize - 1)) == 0)
3045                         chk_guard = 1;
3046                 guard_type = scsi_host_get_guard(cmd->device->host);
3047
3048                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3049                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
3050                 start_app_tag = src->app_tag;
3051                 len = sgpe->length;
3052                 while (src && protsegcnt) {
3053                         while (len) {
3054
3055                                 /*
3056                                  * First check to see if a protection data
3057                                  * check is valid
3058                                  */
3059                                 if ((src->ref_tag == 0xffffffff) ||
3060                                     (src->app_tag == 0xffff)) {
3061                                         start_ref_tag++;
3062                                         goto skipit;
3063                                 }
3064
3065                                 /* First Guard Tag checking */
3066                                 if (chk_guard) {
3067                                         guard_tag = src->guard_tag;
3068                                         if (lpfc_cmd_guard_csum(cmd))
3069                                                 sum = lpfc_bg_csum(data_src,
3070                                                                    blksize);
3071                                         else
3072                                                 sum = lpfc_bg_crc(data_src,
3073                                                                   blksize);
3074                                         if ((guard_tag != sum)) {
3075                                                 err_type = BGS_GUARD_ERR_MASK;
3076                                                 goto out;
3077                                         }
3078                                 }
3079
3080                                 /* Reference Tag checking */
3081                                 ref_tag = be32_to_cpu(src->ref_tag);
3082                                 if (chk_ref && (ref_tag != start_ref_tag)) {
3083                                         err_type = BGS_REFTAG_ERR_MASK;
3084                                         goto out;
3085                                 }
3086                                 start_ref_tag++;
3087
3088                                 /* App Tag checking */
3089                                 app_tag = src->app_tag;
3090                                 if (chk_app && (app_tag != start_app_tag)) {
3091                                         err_type = BGS_APPTAG_ERR_MASK;
3092                                         goto out;
3093                                 }
3094 skipit:
3095                                 len -= sizeof(struct scsi_dif_tuple);
3096                                 if (len < 0)
3097                                         len = 0;
3098                                 src++;
3099
3100                                 data_src += blksize;
3101                                 data_len -= blksize;
3102
3103                                 /*
3104                                  * Are we at the end of the Data segment?
3105                                  * The data segment is only used for Guard
3106                                  * tag checking.
3107                                  */
3108                                 if (chk_guard && (data_len == 0)) {
3109                                         chk_guard = 0;
3110                                         sgde = sg_next(sgde);
3111                                         if (!sgde)
3112                                                 goto out;
3113
3114                                         data_src = (uint8_t *)sg_virt(sgde);
3115                                         data_len = sgde->length;
3116                                         if ((data_len & (blksize - 1)) == 0)
3117                                                 chk_guard = 1;
3118                                 }
3119                         }
3120
3121                         /* Goto the next Protection data segment */
3122                         sgpe = sg_next(sgpe);
3123                         if (sgpe) {
3124                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3125                                 len = sgpe->length;
3126                         } else {
3127                                 src = NULL;
3128                         }
3129                         protsegcnt--;
3130                 }
3131         }
3132 out:
3133         if (err_type == BGS_GUARD_ERR_MASK) {
3134                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3135                                         0x10, 0x1);
3136                 cmd->result = DRIVER_SENSE << 24
3137                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3138                 phba->bg_guard_err_cnt++;
3139                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3140                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3141                                 (unsigned long)scsi_get_lba(cmd),
3142                                 sum, guard_tag);
3143
3144         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3145                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3146                                         0x10, 0x3);
3147                 cmd->result = DRIVER_SENSE << 24
3148                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3149
3150                 phba->bg_reftag_err_cnt++;
3151                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3152                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3153                                 (unsigned long)scsi_get_lba(cmd),
3154                                 ref_tag, start_ref_tag);
3155
3156         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3157                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3158                                         0x10, 0x2);
3159                 cmd->result = DRIVER_SENSE << 24
3160                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3161
3162                 phba->bg_apptag_err_cnt++;
3163                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3164                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3165                                 (unsigned long)scsi_get_lba(cmd),
3166                                 app_tag, start_app_tag);
3167         }
3168 }
3169
3170
3171 /*
3172  * This function checks for BlockGuard errors detected by
3173  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3174  * sense buffer will be set accordingly, paired with
3175  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3176  * detected corruption.
3177  *
3178  * Returns:
3179  *  0 - No error found
3180  *  1 - BlockGuard error found
3181  * -1 - Internal error (bad profile, ...etc)
3182  */
3183 static int
3184 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3185                         struct lpfc_iocbq *pIocbOut)
3186 {
3187         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3188         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3189         int ret = 0;
3190         uint32_t bghm = bgf->bghm;
3191         uint32_t bgstat = bgf->bgstat;
3192         uint64_t failing_sector = 0;
3193
3194         spin_lock(&_dump_buf_lock);
3195         if (!_dump_buf_done) {
3196                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3197                         " Data for %u blocks to debugfs\n",
3198                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3199                 lpfc_debug_save_data(phba, cmd);
3200
3201                 /* If we have a prot sgl, save the DIF buffer */
3202                 if (lpfc_prot_group_type(phba, cmd) ==
3203                                 LPFC_PG_TYPE_DIF_BUF) {
3204                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3205                                 "Saving DIF for %u blocks to debugfs\n",
3206                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3207                         lpfc_debug_save_dif(phba, cmd);
3208                 }
3209
3210                 _dump_buf_done = 1;
3211         }
3212         spin_unlock(&_dump_buf_lock);
3213
3214         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3215                 cmd->result = ScsiResult(DID_ERROR, 0);
3216                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3217                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3218                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3219                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3220                                 (unsigned long long)scsi_get_lba(cmd),
3221                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3222                 ret = (-1);
3223                 goto out;
3224         }
3225
3226         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3227                 cmd->result = ScsiResult(DID_ERROR, 0);
3228                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3229                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3230                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3231                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3232                                 (unsigned long long)scsi_get_lba(cmd),
3233                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3234                 ret = (-1);
3235                 goto out;
3236         }
3237
3238         if (lpfc_bgs_get_guard_err(bgstat)) {
3239                 ret = 1;
3240
3241                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3242                                 0x10, 0x1);
3243                 cmd->result = DRIVER_SENSE << 24
3244                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3245                 phba->bg_guard_err_cnt++;
3246                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3247                                 "9055 BLKGRD: Guard Tag error in cmd"
3248                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3249                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3250                                 (unsigned long long)scsi_get_lba(cmd),
3251                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3252         }
3253
3254         if (lpfc_bgs_get_reftag_err(bgstat)) {
3255                 ret = 1;
3256
3257                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3258                                 0x10, 0x3);
3259                 cmd->result = DRIVER_SENSE << 24
3260                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3261
3262                 phba->bg_reftag_err_cnt++;
3263                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3264                                 "9056 BLKGRD: Ref Tag error in cmd"
3265                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3266                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3267                                 (unsigned long long)scsi_get_lba(cmd),
3268                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3269         }
3270
3271         if (lpfc_bgs_get_apptag_err(bgstat)) {
3272                 ret = 1;
3273
3274                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3275                                 0x10, 0x2);
3276                 cmd->result = DRIVER_SENSE << 24
3277                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3278
3279                 phba->bg_apptag_err_cnt++;
3280                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3281                                 "9061 BLKGRD: App Tag error in cmd"
3282                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3283                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3284                                 (unsigned long long)scsi_get_lba(cmd),
3285                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3286         }
3287
3288         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3289                 /*
3290                  * setup sense data descriptor 0 per SPC-4 as an information
3291                  * field, and put the failing LBA in it.
3292                  * This code assumes there was also a guard/app/ref tag error
3293                  * indication.
3294                  */
3295                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3296                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3297                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3298                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3299
3300                 /* bghm is a "on the wire" FC frame based count */
3301                 switch (scsi_get_prot_op(cmd)) {
3302                 case SCSI_PROT_READ_INSERT:
3303                 case SCSI_PROT_WRITE_STRIP:
3304                         bghm /= cmd->device->sector_size;
3305                         break;
3306                 case SCSI_PROT_READ_STRIP:
3307                 case SCSI_PROT_WRITE_INSERT:
3308                 case SCSI_PROT_READ_PASS:
3309                 case SCSI_PROT_WRITE_PASS:
3310                         bghm /= (cmd->device->sector_size +
3311                                 sizeof(struct scsi_dif_tuple));
3312                         break;
3313                 }
3314
3315                 failing_sector = scsi_get_lba(cmd);
3316                 failing_sector += bghm;
3317
3318                 /* Descriptor Information */
3319                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3320         }
3321
3322         if (!ret) {
3323                 /* No error was reported - problem in FW? */
3324                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3325                                 "9057 BLKGRD: Unknown error in cmd"
3326                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3327                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3328                                 (unsigned long long)scsi_get_lba(cmd),
3329                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3330
3331                 /* Calcuate what type of error it was */
3332                 lpfc_calc_bg_err(phba, lpfc_cmd);
3333         }
3334 out:
3335         return ret;
3336 }
3337
3338 /**
3339  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3340  * @phba: The Hba for which this call is being executed.
3341  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3342  *
3343  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3344  * field of @lpfc_cmd for device with SLI-4 interface spec.
3345  *
3346  * Return codes:
3347  *      1 - Error
3348  *      0 - Success
3349  **/
3350 static int
3351 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3352 {
3353         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3354         struct scatterlist *sgel = NULL;
3355         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3356         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3357         struct sli4_sge *first_data_sgl;
3358         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3359         dma_addr_t physaddr;
3360         uint32_t num_bde = 0;
3361         uint32_t dma_len;
3362         uint32_t dma_offset = 0;
3363         int nseg;
3364         struct ulp_bde64 *bde;
3365
3366         /*
3367          * There are three possibilities here - use scatter-gather segment, use
3368          * the single mapping, or neither.  Start the lpfc command prep by
3369          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3370          * data bde entry.
3371          */
3372         if (scsi_sg_count(scsi_cmnd)) {
3373                 /*
3374                  * The driver stores the segment count returned from pci_map_sg
3375                  * because this a count of dma-mappings used to map the use_sg
3376                  * pages.  They are not guaranteed to be the same for those
3377                  * architectures that implement an IOMMU.
3378                  */
3379
3380                 nseg = scsi_dma_map(scsi_cmnd);
3381                 if (unlikely(!nseg))
3382                         return 1;
3383                 sgl += 1;
3384                 /* clear the last flag in the fcp_rsp map entry */
3385                 sgl->word2 = le32_to_cpu(sgl->word2);
3386                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3387                 sgl->word2 = cpu_to_le32(sgl->word2);
3388                 sgl += 1;
3389                 first_data_sgl = sgl;
3390                 lpfc_cmd->seg_cnt = nseg;
3391                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3392                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3393                                 " %s: Too many sg segments from "
3394                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3395                                 __func__, phba->cfg_sg_seg_cnt,
3396                                lpfc_cmd->seg_cnt);
3397                         lpfc_cmd->seg_cnt = 0;
3398                         scsi_dma_unmap(scsi_cmnd);
3399                         return 1;
3400                 }
3401
3402                 /*
3403                  * The driver established a maximum scatter-gather segment count
3404                  * during probe that limits the number of sg elements in any
3405                  * single scsi command.  Just run through the seg_cnt and format
3406                  * the sge's.
3407                  * When using SLI-3 the driver will try to fit all the BDEs into
3408                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3409                  * does for SLI-2 mode.
3410                  */
3411                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3412                         physaddr = sg_dma_address(sgel);
3413                         dma_len = sg_dma_len(sgel);
3414                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3415                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3416                         sgl->word2 = le32_to_cpu(sgl->word2);
3417                         if ((num_bde + 1) == nseg)
3418                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3419                         else
3420                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3421                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3422                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3423                         sgl->word2 = cpu_to_le32(sgl->word2);
3424                         sgl->sge_len = cpu_to_le32(dma_len);
3425                         dma_offset += dma_len;
3426                         sgl++;
3427                 }
3428                 /* setup the performance hint (first data BDE) if enabled */
3429                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3430                         bde = (struct ulp_bde64 *)
3431                                         &(iocb_cmd->unsli3.sli3Words[5]);
3432                         bde->addrLow = first_data_sgl->addr_lo;
3433                         bde->addrHigh = first_data_sgl->addr_hi;
3434                         bde->tus.f.bdeSize =
3435                                         le32_to_cpu(first_data_sgl->sge_len);
3436                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3437                         bde->tus.w = cpu_to_le32(bde->tus.w);
3438                 }
3439         } else {
3440                 sgl += 1;
3441                 /* clear the last flag in the fcp_rsp map entry */
3442                 sgl->word2 = le32_to_cpu(sgl->word2);
3443                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3444                 sgl->word2 = cpu_to_le32(sgl->word2);
3445         }
3446
3447         /*
3448          * Finish initializing those IOCB fields that are dependent on the
3449          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3450          * explicitly reinitialized.
3451          * all iocb memory resources are reused.
3452          */
3453         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3454
3455         /*
3456          * Due to difference in data length between DIF/non-DIF paths,
3457          * we need to set word 4 of IOCB here
3458          */
3459         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3460
3461         /*
3462          * If the OAS driver feature is enabled and the lun is enabled for
3463          * OAS, set the oas iocb related flags.
3464          */
3465         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3466                 scsi_cmnd->device->hostdata)->oas_enabled)
3467                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_OAS;
3468         return 0;
3469 }
3470
3471 /**
3472  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3473  * @phba: The Hba for which this call is being executed.
3474  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3475  *
3476  * This is the protection/DIF aware version of
3477  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3478  * two functions eventually, but for now, it's here
3479  **/
3480 static int
3481 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3482                 struct lpfc_scsi_buf *lpfc_cmd)
3483 {
3484         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3485         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3486         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3487         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3488         uint32_t num_sge = 0;
3489         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3490         int prot_group_type = 0;
3491         int fcpdl;
3492
3493         /*
3494          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3495          *  fcp_rsp regions to the first data sge entry
3496          */
3497         if (scsi_sg_count(scsi_cmnd)) {
3498                 /*
3499                  * The driver stores the segment count returned from pci_map_sg
3500                  * because this a count of dma-mappings used to map the use_sg
3501                  * pages.  They are not guaranteed to be the same for those
3502                  * architectures that implement an IOMMU.
3503                  */
3504                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3505                                         scsi_sglist(scsi_cmnd),
3506                                         scsi_sg_count(scsi_cmnd), datadir);
3507                 if (unlikely(!datasegcnt))
3508                         return 1;
3509
3510                 sgl += 1;
3511                 /* clear the last flag in the fcp_rsp map entry */
3512                 sgl->word2 = le32_to_cpu(sgl->word2);
3513                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3514                 sgl->word2 = cpu_to_le32(sgl->word2);
3515
3516                 sgl += 1;
3517                 lpfc_cmd->seg_cnt = datasegcnt;
3518
3519                 /* First check if data segment count from SCSI Layer is good */
3520                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3521                         goto err;
3522
3523                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3524
3525                 switch (prot_group_type) {
3526                 case LPFC_PG_TYPE_NO_DIF:
3527                         /* Here we need to add a DISEED to the count */
3528                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3529                                 goto err;
3530
3531                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3532                                         datasegcnt);
3533
3534                         /* we should have 2 or more entries in buffer list */
3535                         if (num_sge < 2)
3536                                 goto err;
3537                         break;
3538
3539                 case LPFC_PG_TYPE_DIF_BUF:
3540                         /*
3541                          * This type indicates that protection buffers are
3542                          * passed to the driver, so that needs to be prepared
3543                          * for DMA
3544                          */
3545                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3546                                         scsi_prot_sglist(scsi_cmnd),
3547                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3548                         if (unlikely(!protsegcnt)) {
3549                                 scsi_dma_unmap(scsi_cmnd);
3550                                 return 1;
3551                         }
3552
3553                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3554                         /*
3555                          * There is a minimun of 3 SGEs used for every
3556                          * protection data segment.
3557                          */
3558                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3559                             (phba->cfg_total_seg_cnt - 2))
3560                                 goto err;
3561
3562                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3563                                         datasegcnt, protsegcnt);
3564
3565                         /* we should have 3 or more entries in buffer list */
3566                         if ((num_sge < 3) ||
3567                             (num_sge > phba->cfg_total_seg_cnt))
3568                                 goto err;
3569                         break;
3570
3571                 case LPFC_PG_TYPE_INVALID:
3572                 default:
3573                         scsi_dma_unmap(scsi_cmnd);
3574                         lpfc_cmd->seg_cnt = 0;
3575
3576                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3577                                         "9083 Unexpected protection group %i\n",
3578                                         prot_group_type);
3579                         return 1;
3580                 }
3581         }
3582
3583         switch (scsi_get_prot_op(scsi_cmnd)) {
3584         case SCSI_PROT_WRITE_STRIP:
3585         case SCSI_PROT_READ_STRIP:
3586                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3587                 break;
3588         case SCSI_PROT_WRITE_INSERT:
3589         case SCSI_PROT_READ_INSERT:
3590                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3591                 break;
3592         case SCSI_PROT_WRITE_PASS:
3593         case SCSI_PROT_READ_PASS:
3594                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3595                 break;
3596         }
3597
3598         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3599         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3600
3601         /*
3602          * Due to difference in data length between DIF/non-DIF paths,
3603          * we need to set word 4 of IOCB here
3604          */
3605         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3606
3607         return 0;
3608 err:
3609         if (lpfc_cmd->seg_cnt)
3610                 scsi_dma_unmap(scsi_cmnd);
3611         if (lpfc_cmd->prot_seg_cnt)
3612                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3613                              scsi_prot_sg_count(scsi_cmnd),
3614                              scsi_cmnd->sc_data_direction);
3615
3616         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3617                         "9084 Cannot setup S/G List for HBA"
3618                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3619                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3620                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3621                         prot_group_type, num_sge);
3622
3623         lpfc_cmd->seg_cnt = 0;
3624         lpfc_cmd->prot_seg_cnt = 0;
3625         return 1;
3626 }
3627
3628 /**
3629  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3630  * @phba: The Hba for which this call is being executed.
3631  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3632  *
3633  * This routine wraps the actual DMA mapping function pointer from the
3634  * lpfc_hba struct.
3635  *
3636  * Return codes:
3637  *      1 - Error
3638  *      0 - Success
3639  **/
3640 static inline int
3641 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3642 {
3643         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3644 }
3645
3646 /**
3647  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3648  * using BlockGuard.
3649  * @phba: The Hba for which this call is being executed.
3650  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3651  *
3652  * This routine wraps the actual DMA mapping function pointer from the
3653  * lpfc_hba struct.
3654  *
3655  * Return codes:
3656  *      1 - Error
3657  *      0 - Success
3658  **/
3659 static inline int
3660 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3661 {
3662         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3663 }
3664
3665 /**
3666  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3667  * @phba: Pointer to hba context object.
3668  * @vport: Pointer to vport object.
3669  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3670  * @rsp_iocb: Pointer to response iocb object which reported error.
3671  *
3672  * This function posts an event when there is a SCSI command reporting
3673  * error from the scsi device.
3674  **/
3675 static void
3676 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3677                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3678         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3679         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3680         uint32_t resp_info = fcprsp->rspStatus2;
3681         uint32_t scsi_status = fcprsp->rspStatus3;
3682         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3683         struct lpfc_fast_path_event *fast_path_evt = NULL;
3684         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3685         unsigned long flags;
3686
3687         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3688                 return;
3689
3690         /* If there is queuefull or busy condition send a scsi event */
3691         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3692                 (cmnd->result == SAM_STAT_BUSY)) {
3693                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3694                 if (!fast_path_evt)
3695                         return;
3696                 fast_path_evt->un.scsi_evt.event_type =
3697                         FC_REG_SCSI_EVENT;
3698                 fast_path_evt->un.scsi_evt.subcategory =
3699                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3700                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3701                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3702                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3703                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3704                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3705                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3706         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3707                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3708                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3709                 if (!fast_path_evt)
3710                         return;
3711                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3712                         FC_REG_SCSI_EVENT;
3713                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3714                         LPFC_EVENT_CHECK_COND;
3715                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3716                         cmnd->device->lun;
3717                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3718                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3719                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3720                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3721                 fast_path_evt->un.check_cond_evt.sense_key =
3722                         cmnd->sense_buffer[2] & 0xf;
3723                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3724                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3725         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3726                      fcpi_parm &&
3727                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3728                         ((scsi_status == SAM_STAT_GOOD) &&
3729                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3730                 /*
3731                  * If status is good or resid does not match with fcp_param and
3732                  * there is valid fcpi_parm, then there is a read_check error
3733                  */
3734                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3735                 if (!fast_path_evt)
3736                         return;
3737                 fast_path_evt->un.read_check_error.header.event_type =
3738                         FC_REG_FABRIC_EVENT;
3739                 fast_path_evt->un.read_check_error.header.subcategory =
3740                         LPFC_EVENT_FCPRDCHKERR;
3741                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3742                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3743                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3744                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3745                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3746                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3747                 fast_path_evt->un.read_check_error.fcpiparam =
3748                         fcpi_parm;
3749         } else
3750                 return;
3751
3752         fast_path_evt->vport = vport;
3753         spin_lock_irqsave(&phba->hbalock, flags);
3754         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3755         spin_unlock_irqrestore(&phba->hbalock, flags);
3756         lpfc_worker_wake_up(phba);
3757         return;
3758 }
3759
3760 /**
3761  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3762  * @phba: The HBA for which this call is being executed.
3763  * @psb: The scsi buffer which is going to be un-mapped.
3764  *
3765  * This routine does DMA un-mapping of scatter gather list of scsi command
3766  * field of @lpfc_cmd for device with SLI-3 interface spec.
3767  **/
3768 static void
3769 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3770 {
3771         /*
3772          * There are only two special cases to consider.  (1) the scsi command
3773          * requested scatter-gather usage or (2) the scsi command allocated
3774          * a request buffer, but did not request use_sg.  There is a third
3775          * case, but it does not require resource deallocation.
3776          */
3777         if (psb->seg_cnt > 0)
3778                 scsi_dma_unmap(psb->pCmd);
3779         if (psb->prot_seg_cnt > 0)
3780                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3781                                 scsi_prot_sg_count(psb->pCmd),
3782                                 psb->pCmd->sc_data_direction);
3783 }
3784
3785 /**
3786  * lpfc_handler_fcp_err - FCP response handler
3787  * @vport: The virtual port for which this call is being executed.
3788  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3789  * @rsp_iocb: The response IOCB which contains FCP error.
3790  *
3791  * This routine is called to process response IOCB with status field
3792  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3793  * based upon SCSI and FCP error.
3794  **/
3795 static void
3796 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3797                     struct lpfc_iocbq *rsp_iocb)
3798 {
3799         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3800         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3801         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3802         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3803         uint32_t resp_info = fcprsp->rspStatus2;
3804         uint32_t scsi_status = fcprsp->rspStatus3;
3805         uint32_t *lp;
3806         uint32_t host_status = DID_OK;
3807         uint32_t rsplen = 0;
3808         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3809
3810
3811         /*
3812          *  If this is a task management command, there is no
3813          *  scsi packet associated with this lpfc_cmd.  The driver
3814          *  consumes it.
3815          */
3816         if (fcpcmd->fcpCntl2) {
3817                 scsi_status = 0;
3818                 goto out;
3819         }
3820
3821         if (resp_info & RSP_LEN_VALID) {
3822                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3823                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3824                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3825                                  "2719 Invalid response length: "
3826                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3827                                  cmnd->device->id,
3828                                  cmnd->device->lun, cmnd->cmnd[0],
3829                                  rsplen);
3830                         host_status = DID_ERROR;
3831                         goto out;
3832                 }
3833                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3834                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3835                                  "2757 Protocol failure detected during "
3836                                  "processing of FCP I/O op: "
3837                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3838                                  cmnd->device->id,
3839                                  cmnd->device->lun, cmnd->cmnd[0],
3840                                  fcprsp->rspInfo3);
3841                         host_status = DID_ERROR;
3842                         goto out;
3843                 }
3844         }
3845
3846         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3847                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3848                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3849                         snslen = SCSI_SENSE_BUFFERSIZE;
3850
3851                 if (resp_info & RSP_LEN_VALID)
3852                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3853                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3854         }
3855         lp = (uint32_t *)cmnd->sense_buffer;
3856
3857         /* special handling for under run conditions */
3858         if (!scsi_status && (resp_info & RESID_UNDER)) {
3859                 /* don't log under runs if fcp set... */
3860                 if (vport->cfg_log_verbose & LOG_FCP)
3861                         logit = LOG_FCP_ERROR;
3862                 /* unless operator says so */
3863                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3864                         logit = LOG_FCP_UNDER;
3865         }
3866
3867         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3868                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3869                          "Data: x%x x%x x%x x%x x%x\n",
3870                          cmnd->cmnd[0], scsi_status,
3871                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3872                          be32_to_cpu(fcprsp->rspResId),
3873                          be32_to_cpu(fcprsp->rspSnsLen),
3874                          be32_to_cpu(fcprsp->rspRspLen),
3875                          fcprsp->rspInfo3);
3876
3877         scsi_set_resid(cmnd, 0);
3878         if (resp_info & RESID_UNDER) {
3879                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3880
3881                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3882                                  "9025 FCP Read Underrun, expected %d, "
3883                                  "residual %d Data: x%x x%x x%x\n",
3884                                  be32_to_cpu(fcpcmd->fcpDl),
3885                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3886                                  cmnd->underflow);
3887
3888                 /*
3889                  * If there is an under run check if under run reported by
3890                  * storage array is same as the under run reported by HBA.
3891                  * If this is not same, there is a dropped frame.
3892                  */
3893                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3894                         fcpi_parm &&
3895                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3896                         lpfc_printf_vlog(vport, KERN_WARNING,
3897                                          LOG_FCP | LOG_FCP_ERROR,
3898                                          "9026 FCP Read Check Error "
3899                                          "and Underrun Data: x%x x%x x%x x%x\n",
3900                                          be32_to_cpu(fcpcmd->fcpDl),
3901                                          scsi_get_resid(cmnd), fcpi_parm,
3902                                          cmnd->cmnd[0]);
3903                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3904                         host_status = DID_ERROR;
3905                 }
3906                 /*
3907                  * The cmnd->underflow is the minimum number of bytes that must
3908                  * be transferred for this command.  Provided a sense condition
3909                  * is not present, make sure the actual amount transferred is at
3910                  * least the underflow value or fail.
3911                  */
3912                 if (!(resp_info & SNS_LEN_VALID) &&
3913                     (scsi_status == SAM_STAT_GOOD) &&
3914                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3915                      < cmnd->underflow)) {
3916                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3917                                          "9027 FCP command x%x residual "
3918                                          "underrun converted to error "
3919                                          "Data: x%x x%x x%x\n",
3920                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3921                                          scsi_get_resid(cmnd), cmnd->underflow);
3922                         host_status = DID_ERROR;
3923                 }
3924         } else if (resp_info & RESID_OVER) {
3925                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3926                                  "9028 FCP command x%x residual overrun error. "
3927                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3928                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3929                 host_status = DID_ERROR;
3930
3931         /*
3932          * Check SLI validation that all the transfer was actually done
3933          * (fcpi_parm should be zero). Apply check only to reads.
3934          */
3935         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
3936                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3937                                  "9029 FCP Read Check Error Data: "
3938                                  "x%x x%x x%x x%x x%x\n",
3939                                  be32_to_cpu(fcpcmd->fcpDl),
3940                                  be32_to_cpu(fcprsp->rspResId),
3941                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3942                 switch (scsi_status) {
3943                 case SAM_STAT_GOOD:
3944                 case SAM_STAT_CHECK_CONDITION:
3945                         /* Fabric dropped a data frame. Fail any successful
3946                          * command in which we detected dropped frames.
3947                          * A status of good or some check conditions could
3948                          * be considered a successful command.
3949                          */
3950                         host_status = DID_ERROR;
3951                         break;
3952                 }
3953                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3954         }
3955
3956  out:
3957         cmnd->result = ScsiResult(host_status, scsi_status);
3958         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3959 }
3960
3961 /**
3962  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3963  * @phba: The Hba for which this call is being executed.
3964  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3965  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3966  *
3967  * This routine assigns scsi command result by looking into response IOCB
3968  * status field appropriately. This routine handles QUEUE FULL condition as
3969  * well by ramping down device queue depth.
3970  **/
3971 static void
3972 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3973                         struct lpfc_iocbq *pIocbOut)
3974 {
3975         struct lpfc_scsi_buf *lpfc_cmd =
3976                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3977         struct lpfc_vport      *vport = pIocbIn->vport;
3978         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3979         struct lpfc_nodelist *pnode = rdata->pnode;
3980         struct scsi_cmnd *cmd;
3981         int result;
3982         int depth;
3983         unsigned long flags;
3984         struct lpfc_fast_path_event *fast_path_evt;
3985         struct Scsi_Host *shost;
3986         uint32_t queue_depth, scsi_id;
3987         uint32_t logit = LOG_FCP;
3988
3989         /* Sanity check on return of outstanding command */
3990         if (!(lpfc_cmd->pCmd))
3991                 return;
3992         cmd = lpfc_cmd->pCmd;
3993         shost = cmd->device->host;
3994
3995         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3996         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3997         /* pick up SLI4 exhange busy status from HBA */
3998         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3999
4000 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4001         if (lpfc_cmd->prot_data_type) {
4002                 struct scsi_dif_tuple *src = NULL;
4003
4004                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4005                 /*
4006                  * Used to restore any changes to protection
4007                  * data for error injection.
4008                  */
4009                 switch (lpfc_cmd->prot_data_type) {
4010                 case LPFC_INJERR_REFTAG:
4011                         src->ref_tag =
4012                                 lpfc_cmd->prot_data;
4013                         break;
4014                 case LPFC_INJERR_APPTAG:
4015                         src->app_tag =
4016                                 (uint16_t)lpfc_cmd->prot_data;
4017                         break;
4018                 case LPFC_INJERR_GUARD:
4019                         src->guard_tag =
4020                                 (uint16_t)lpfc_cmd->prot_data;
4021                         break;
4022                 default:
4023                         break;
4024                 }
4025
4026                 lpfc_cmd->prot_data = 0;
4027                 lpfc_cmd->prot_data_type = 0;
4028                 lpfc_cmd->prot_data_segment = NULL;
4029         }
4030 #endif
4031         if (pnode && NLP_CHK_NODE_ACT(pnode))
4032                 atomic_dec(&pnode->cmd_pending);
4033
4034         if (lpfc_cmd->status) {
4035                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4036                     (lpfc_cmd->result & IOERR_DRVR_MASK))
4037                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4038                 else if (lpfc_cmd->status >= IOSTAT_CNT)
4039                         lpfc_cmd->status = IOSTAT_DEFAULT;
4040                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4041                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
4042                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4043                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4044                         logit = 0;
4045                 else
4046                         logit = LOG_FCP | LOG_FCP_UNDER;
4047                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4048                          "9030 FCP cmd x%x failed <%d/%lld> "
4049                          "status: x%x result: x%x "
4050                          "sid: x%x did: x%x oxid: x%x "
4051                          "Data: x%x x%x\n",
4052                          cmd->cmnd[0],
4053                          cmd->device ? cmd->device->id : 0xffff,
4054                          cmd->device ? cmd->device->lun : 0xffff,
4055                          lpfc_cmd->status, lpfc_cmd->result,
4056                          vport->fc_myDID,
4057                          (pnode) ? pnode->nlp_DID : 0,
4058                          phba->sli_rev == LPFC_SLI_REV4 ?
4059                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4060                          pIocbOut->iocb.ulpContext,
4061                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4062
4063                 switch (lpfc_cmd->status) {
4064                 case IOSTAT_FCP_RSP_ERROR:
4065                         /* Call FCP RSP handler to determine result */
4066                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4067                         break;
4068                 case IOSTAT_NPORT_BSY:
4069                 case IOSTAT_FABRIC_BSY:
4070                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4071                         fast_path_evt = lpfc_alloc_fast_evt(phba);
4072                         if (!fast_path_evt)
4073                                 break;
4074                         fast_path_evt->un.fabric_evt.event_type =
4075                                 FC_REG_FABRIC_EVENT;
4076                         fast_path_evt->un.fabric_evt.subcategory =
4077                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4078                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4079                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4080                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4081                                         &pnode->nlp_portname,
4082                                         sizeof(struct lpfc_name));
4083                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4084                                         &pnode->nlp_nodename,
4085                                         sizeof(struct lpfc_name));
4086                         }
4087                         fast_path_evt->vport = vport;
4088                         fast_path_evt->work_evt.evt =
4089                                 LPFC_EVT_FASTPATH_MGMT_EVT;
4090                         spin_lock_irqsave(&phba->hbalock, flags);
4091                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
4092                                 &phba->work_list);
4093                         spin_unlock_irqrestore(&phba->hbalock, flags);
4094                         lpfc_worker_wake_up(phba);
4095                         break;
4096                 case IOSTAT_LOCAL_REJECT:
4097                 case IOSTAT_REMOTE_STOP:
4098                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4099                             lpfc_cmd->result ==
4100                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4101                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4102                             lpfc_cmd->result ==
4103                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4104                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4105                                 break;
4106                         }
4107                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4108                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4109                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4110                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4111                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
4112                                 break;
4113                         }
4114                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4115                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4116                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4117                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4118                                         /*
4119                                          * This is a response for a BG enabled
4120                                          * cmd. Parse BG error
4121                                          */
4122                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4123                                                         pIocbOut);
4124                                         break;
4125                                 } else {
4126                                         lpfc_printf_vlog(vport, KERN_WARNING,
4127                                                         LOG_BG,
4128                                                         "9031 non-zero BGSTAT "
4129                                                         "on unprotected cmd\n");
4130                                 }
4131                         }
4132                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4133                                 && (phba->sli_rev == LPFC_SLI_REV4)
4134                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4135                                 /* This IO was aborted by the target, we don't
4136                                  * know the rxid and because we did not send the
4137                                  * ABTS we cannot generate and RRQ.
4138                                  */
4139                                 lpfc_set_rrq_active(phba, pnode,
4140                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4141                                         0, 0);
4142                         }
4143                 /* else: fall through */
4144                 default:
4145                         cmd->result = ScsiResult(DID_ERROR, 0);
4146                         break;
4147                 }
4148
4149                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4150                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4151                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4152                                                  SAM_STAT_BUSY);
4153         } else
4154                 cmd->result = ScsiResult(DID_OK, 0);
4155
4156         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4157                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4158
4159                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4160                                  "0710 Iodone <%d/%llu> cmd %p, error "
4161                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4162                                  cmd->device->id, cmd->device->lun, cmd,
4163                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4164                                  scsi_get_resid(cmd));
4165         }
4166
4167         lpfc_update_stats(phba, lpfc_cmd);
4168         result = cmd->result;
4169         if (vport->cfg_max_scsicmpl_time &&
4170            time_after(jiffies, lpfc_cmd->start_time +
4171                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4172                 spin_lock_irqsave(shost->host_lock, flags);
4173                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4174                         if (pnode->cmd_qdepth >
4175                                 atomic_read(&pnode->cmd_pending) &&
4176                                 (atomic_read(&pnode->cmd_pending) >
4177                                 LPFC_MIN_TGT_QDEPTH) &&
4178                                 ((cmd->cmnd[0] == READ_10) ||
4179                                 (cmd->cmnd[0] == WRITE_10)))
4180                                 pnode->cmd_qdepth =
4181                                         atomic_read(&pnode->cmd_pending);
4182
4183                         pnode->last_change_time = jiffies;
4184                 }
4185                 spin_unlock_irqrestore(shost->host_lock, flags);
4186         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4187                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4188                    time_after(jiffies, pnode->last_change_time +
4189                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4190                         spin_lock_irqsave(shost->host_lock, flags);
4191                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4192                                 / 100;
4193                         depth = depth ? depth : 1;
4194                         pnode->cmd_qdepth += depth;
4195                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4196                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4197                         pnode->last_change_time = jiffies;
4198                         spin_unlock_irqrestore(shost->host_lock, flags);
4199                 }
4200         }
4201
4202         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4203
4204         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4205         queue_depth = cmd->device->queue_depth;
4206         scsi_id = cmd->device->id;
4207         cmd->scsi_done(cmd);
4208
4209         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4210                 spin_lock_irqsave(&phba->hbalock, flags);
4211                 lpfc_cmd->pCmd = NULL;
4212                 spin_unlock_irqrestore(&phba->hbalock, flags);
4213
4214                 /*
4215                  * If there is a thread waiting for command completion
4216                  * wake up the thread.
4217                  */
4218                 spin_lock_irqsave(shost->host_lock, flags);
4219                 if (lpfc_cmd->waitq)
4220                         wake_up(lpfc_cmd->waitq);
4221                 spin_unlock_irqrestore(shost->host_lock, flags);
4222                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4223                 return;
4224         }
4225
4226         spin_lock_irqsave(&phba->hbalock, flags);
4227         lpfc_cmd->pCmd = NULL;
4228         spin_unlock_irqrestore(&phba->hbalock, flags);
4229
4230         /*
4231          * If there is a thread waiting for command completion
4232          * wake up the thread.
4233          */
4234         spin_lock_irqsave(shost->host_lock, flags);
4235         if (lpfc_cmd->waitq)
4236                 wake_up(lpfc_cmd->waitq);
4237         spin_unlock_irqrestore(shost->host_lock, flags);
4238
4239         lpfc_release_scsi_buf(phba, lpfc_cmd);
4240 }
4241
4242 /**
4243  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4244  * @data: A pointer to the immediate command data portion of the IOCB.
4245  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4246  *
4247  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4248  * byte swapping the data to big endian format for transmission on the wire.
4249  **/
4250 static void
4251 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4252 {
4253         int i, j;
4254         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4255              i += sizeof(uint32_t), j++) {
4256                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4257         }
4258 }
4259
4260 /**
4261  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4262  * @vport: The virtual port for which this call is being executed.
4263  * @lpfc_cmd: The scsi command which needs to send.
4264  * @pnode: Pointer to lpfc_nodelist.
4265  *
4266  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4267  * to transfer for device with SLI3 interface spec.
4268  **/
4269 static void
4270 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4271                     struct lpfc_nodelist *pnode)
4272 {
4273         struct lpfc_hba *phba = vport->phba;
4274         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4275         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4276         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4277         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4278         int datadir = scsi_cmnd->sc_data_direction;
4279         char tag[2];
4280         uint8_t *ptr;
4281         bool sli4;
4282         uint32_t fcpdl;
4283
4284         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4285                 return;
4286
4287         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4288         /* clear task management bits */
4289         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4290
4291         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4292                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4293
4294         ptr = &fcp_cmnd->fcpCdb[0];
4295         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4296         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4297                 ptr += scsi_cmnd->cmd_len;
4298                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4299         }
4300
4301         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
4302                 switch (tag[0]) {
4303                 case HEAD_OF_QUEUE_TAG:
4304                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
4305                         break;
4306                 case ORDERED_QUEUE_TAG:
4307                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
4308                         break;
4309                 default:
4310                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4311                         break;
4312                 }
4313         } else
4314                 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4315
4316         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4317         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4318
4319         /*
4320          * There are three possibilities here - use scatter-gather segment, use
4321          * the single mapping, or neither.  Start the lpfc command prep by
4322          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4323          * data bde entry.
4324          */
4325         if (scsi_sg_count(scsi_cmnd)) {
4326                 if (datadir == DMA_TO_DEVICE) {
4327                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4328                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4329                         if (vport->cfg_first_burst_size &&
4330                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4331                                 fcpdl = scsi_bufflen(scsi_cmnd);
4332                                 if (fcpdl < vport->cfg_first_burst_size)
4333                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4334                                 else
4335                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4336                                                 vport->cfg_first_burst_size;
4337                         }
4338                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4339                         phba->fc4OutputRequests++;
4340                 } else {
4341                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4342                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4343                         fcp_cmnd->fcpCntl3 = READ_DATA;
4344                         phba->fc4InputRequests++;
4345                 }
4346         } else {
4347                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4348                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4349                 iocb_cmd->ulpPU = 0;
4350                 fcp_cmnd->fcpCntl3 = 0;
4351                 phba->fc4ControlRequests++;
4352         }
4353         if (phba->sli_rev == 3 &&
4354             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4355                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4356         /*
4357          * Finish initializing those IOCB fields that are independent
4358          * of the scsi_cmnd request_buffer
4359          */
4360         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4361         if (sli4)
4362                 piocbq->iocb.ulpContext =
4363                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4364         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4365                 piocbq->iocb.ulpFCP2Rcvy = 1;
4366         else
4367                 piocbq->iocb.ulpFCP2Rcvy = 0;
4368
4369         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4370         piocbq->context1  = lpfc_cmd;
4371         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4372         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4373         piocbq->vport = vport;
4374 }
4375
4376 /**
4377  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4378  * @vport: The virtual port for which this call is being executed.
4379  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4380  * @lun: Logical unit number.
4381  * @task_mgmt_cmd: SCSI task management command.
4382  *
4383  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4384  * for device with SLI-3 interface spec.
4385  *
4386  * Return codes:
4387  *   0 - Error
4388  *   1 - Success
4389  **/
4390 static int
4391 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4392                              struct lpfc_scsi_buf *lpfc_cmd,
4393                              uint64_t lun,
4394                              uint8_t task_mgmt_cmd)
4395 {
4396         struct lpfc_iocbq *piocbq;
4397         IOCB_t *piocb;
4398         struct fcp_cmnd *fcp_cmnd;
4399         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4400         struct lpfc_nodelist *ndlp = rdata->pnode;
4401
4402         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4403             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4404                 return 0;
4405
4406         piocbq = &(lpfc_cmd->cur_iocbq);
4407         piocbq->vport = vport;
4408
4409         piocb = &piocbq->iocb;
4410
4411         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4412         /* Clear out any old data in the FCP command area */
4413         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4414         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4415         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4416         if (vport->phba->sli_rev == 3 &&
4417             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4418                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4419         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4420         piocb->ulpContext = ndlp->nlp_rpi;
4421         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4422                 piocb->ulpContext =
4423                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4424         }
4425         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4426         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4427         piocb->ulpPU = 0;
4428         piocb->un.fcpi.fcpi_parm = 0;
4429
4430         /* ulpTimeout is only one byte */
4431         if (lpfc_cmd->timeout > 0xff) {
4432                 /*
4433                  * Do not timeout the command at the firmware level.
4434                  * The driver will provide the timeout mechanism.
4435                  */
4436                 piocb->ulpTimeout = 0;
4437         } else
4438                 piocb->ulpTimeout = lpfc_cmd->timeout;
4439
4440         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4441                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4442
4443         return 1;
4444 }
4445
4446 /**
4447  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4448  * @phba: The hba struct for which this call is being executed.
4449  * @dev_grp: The HBA PCI-Device group number.
4450  *
4451  * This routine sets up the SCSI interface API function jump table in @phba
4452  * struct.
4453  * Returns: 0 - success, -ENODEV - failure.
4454  **/
4455 int
4456 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4457 {
4458
4459         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4460         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4461
4462         switch (dev_grp) {
4463         case LPFC_PCI_DEV_LP:
4464                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4465                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4466                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4467                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4468                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4469                 break;
4470         case LPFC_PCI_DEV_OC:
4471                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4472                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4473                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4474                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4475                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4476                 break;
4477         default:
4478                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4479                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4480                                 dev_grp);
4481                 return -ENODEV;
4482                 break;
4483         }
4484         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4485         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4486         return 0;
4487 }
4488
4489 /**
4490  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4491  * @phba: The Hba for which this call is being executed.
4492  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4493  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4494  *
4495  * This routine is IOCB completion routine for device reset and target reset
4496  * routine. This routine release scsi buffer associated with lpfc_cmd.
4497  **/
4498 static void
4499 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4500                         struct lpfc_iocbq *cmdiocbq,
4501                         struct lpfc_iocbq *rspiocbq)
4502 {
4503         struct lpfc_scsi_buf *lpfc_cmd =
4504                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4505         if (lpfc_cmd)
4506                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4507         return;
4508 }
4509
4510 /**
4511  * lpfc_info - Info entry point of scsi_host_template data structure
4512  * @host: The scsi host for which this call is being executed.
4513  *
4514  * This routine provides module information about hba.
4515  *
4516  * Reutrn code:
4517  *   Pointer to char - Success.
4518  **/
4519 const char *
4520 lpfc_info(struct Scsi_Host *host)
4521 {
4522         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4523         struct lpfc_hba   *phba = vport->phba;
4524         int len, link_speed = 0;
4525         static char  lpfcinfobuf[384];
4526
4527         memset(lpfcinfobuf,0,384);
4528         if (phba && phba->pcidev){
4529                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4530                 len = strlen(lpfcinfobuf);
4531                 snprintf(lpfcinfobuf + len,
4532                         384-len,
4533                         " on PCI bus %02x device %02x irq %d",
4534                         phba->pcidev->bus->number,
4535                         phba->pcidev->devfn,
4536                         phba->pcidev->irq);
4537                 len = strlen(lpfcinfobuf);
4538                 if (phba->Port[0]) {
4539                         snprintf(lpfcinfobuf + len,
4540                                  384-len,
4541                                  " port %s",
4542                                  phba->Port);
4543                 }
4544                 len = strlen(lpfcinfobuf);
4545                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4546                         link_speed = lpfc_sli_port_speed_get(phba);
4547                 } else {
4548                         if (phba->sli4_hba.link_state.logical_speed)
4549                                 link_speed =
4550                                       phba->sli4_hba.link_state.logical_speed;
4551                         else
4552                                 link_speed = phba->sli4_hba.link_state.speed;
4553                 }
4554                 if (link_speed != 0)
4555                         snprintf(lpfcinfobuf + len, 384-len,
4556                                  " Logical Link Speed: %d Mbps", link_speed);
4557         }
4558         return lpfcinfobuf;
4559 }
4560
4561 /**
4562  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4563  * @phba: The Hba for which this call is being executed.
4564  *
4565  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4566  * The default value of cfg_poll_tmo is 10 milliseconds.
4567  **/
4568 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4569 {
4570         unsigned long  poll_tmo_expires =
4571                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4572
4573         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4574                 mod_timer(&phba->fcp_poll_timer,
4575                           poll_tmo_expires);
4576 }
4577
4578 /**
4579  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4580  * @phba: The Hba for which this call is being executed.
4581  *
4582  * This routine starts the fcp_poll_timer of @phba.
4583  **/
4584 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4585 {
4586         lpfc_poll_rearm_timer(phba);
4587 }
4588
4589 /**
4590  * lpfc_poll_timeout - Restart polling timer
4591  * @ptr: Map to lpfc_hba data structure pointer.
4592  *
4593  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4594  * and FCP Ring interrupt is disable.
4595  **/
4596
4597 void lpfc_poll_timeout(unsigned long ptr)
4598 {
4599         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4600
4601         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4602                 lpfc_sli_handle_fast_ring_event(phba,
4603                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4604
4605                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4606                         lpfc_poll_rearm_timer(phba);
4607         }
4608 }
4609
4610 /**
4611  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4612  * @cmnd: Pointer to scsi_cmnd data structure.
4613  * @done: Pointer to done routine.
4614  *
4615  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4616  * This routine prepares an IOCB from scsi command and provides to firmware.
4617  * The @done callback is invoked after driver finished processing the command.
4618  *
4619  * Return value :
4620  *   0 - Success
4621  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4622  **/
4623 static int
4624 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4625 {
4626         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4627         struct lpfc_hba   *phba = vport->phba;
4628         struct lpfc_rport_data *rdata;
4629         struct lpfc_nodelist *ndlp;
4630         struct lpfc_scsi_buf *lpfc_cmd;
4631         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4632         int err;
4633
4634         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4635         err = fc_remote_port_chkready(rport);
4636         if (err) {
4637                 cmnd->result = err;
4638                 goto out_fail_command;
4639         }
4640         ndlp = rdata->pnode;
4641
4642         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4643                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4644
4645                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4646                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4647                                 " op:%02x str=%s without registering for"
4648                                 " BlockGuard - Rejecting command\n",
4649                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4650                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4651                 goto out_fail_command;
4652         }
4653
4654         /*
4655          * Catch race where our node has transitioned, but the
4656          * transport is still transitioning.
4657          */
4658         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4659                 goto out_tgt_busy;
4660         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4661                 goto out_tgt_busy;
4662
4663         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4664         if (lpfc_cmd == NULL) {
4665                 lpfc_rampdown_queue_depth(phba);
4666
4667                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4668                                  "0707 driver's buffer pool is empty, "
4669                                  "IO busied\n");
4670                 goto out_host_busy;
4671         }
4672
4673         /*
4674          * Store the midlayer's command structure for the completion phase
4675          * and complete the command initialization.
4676          */
4677         lpfc_cmd->pCmd  = cmnd;
4678         lpfc_cmd->rdata = rdata;
4679         lpfc_cmd->timeout = 0;
4680         lpfc_cmd->start_time = jiffies;
4681         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4682
4683         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4684                 if (vport->phba->cfg_enable_bg) {
4685                         lpfc_printf_vlog(vport,
4686                                          KERN_INFO, LOG_SCSI_CMD,
4687                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4688                                          "sector x%llx cnt %u pt %x\n",
4689                                          dif_op_str[scsi_get_prot_op(cmnd)],
4690                                          cmnd->cmnd[0],
4691                                          (unsigned long long)scsi_get_lba(cmnd),
4692                                          blk_rq_sectors(cmnd->request),
4693                                          (cmnd->cmnd[1]>>5));
4694                 }
4695                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4696         } else {
4697                 if (vport->phba->cfg_enable_bg) {
4698                         lpfc_printf_vlog(vport,
4699                                          KERN_INFO, LOG_SCSI_CMD,
4700                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4701                                          "x%x sector x%llx cnt %u pt %x\n",
4702                                          cmnd->cmnd[0],
4703                                          (unsigned long long)scsi_get_lba(cmnd),
4704                                          blk_rq_sectors(cmnd->request),
4705                                          (cmnd->cmnd[1]>>5));
4706                 }
4707                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4708         }
4709
4710         if (err)
4711                 goto out_host_busy_free_buf;
4712
4713         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4714
4715         atomic_inc(&ndlp->cmd_pending);
4716         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4717                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4718         if (err) {
4719                 atomic_dec(&ndlp->cmd_pending);
4720                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4721                                  "3376 FCP could not issue IOCB err %x"
4722                                  "FCP cmd x%x <%d/%llu> "
4723                                  "sid: x%x did: x%x oxid: x%x "
4724                                  "Data: x%x x%x x%x x%x\n",
4725                                  err, cmnd->cmnd[0],
4726                                  cmnd->device ? cmnd->device->id : 0xffff,
4727                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4728                                  vport->fc_myDID, ndlp->nlp_DID,
4729                                  phba->sli_rev == LPFC_SLI_REV4 ?
4730                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4731                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4732                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4733                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4734                                  (uint32_t)
4735                                  (cmnd->request->timeout / 1000));
4736
4737
4738                 goto out_host_busy_free_buf;
4739         }
4740         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4741                 lpfc_sli_handle_fast_ring_event(phba,
4742                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4743
4744                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4745                         lpfc_poll_rearm_timer(phba);
4746         }
4747
4748         return 0;
4749
4750  out_host_busy_free_buf:
4751         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4752         lpfc_release_scsi_buf(phba, lpfc_cmd);
4753  out_host_busy:
4754         return SCSI_MLQUEUE_HOST_BUSY;
4755
4756  out_tgt_busy:
4757         return SCSI_MLQUEUE_TARGET_BUSY;
4758
4759  out_fail_command:
4760         cmnd->scsi_done(cmnd);
4761         return 0;
4762 }
4763
4764
4765 /**
4766  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4767  * @cmnd: Pointer to scsi_cmnd data structure.
4768  *
4769  * This routine aborts @cmnd pending in base driver.
4770  *
4771  * Return code :
4772  *   0x2003 - Error
4773  *   0x2002 - Success
4774  **/
4775 static int
4776 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4777 {
4778         struct Scsi_Host  *shost = cmnd->device->host;
4779         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4780         struct lpfc_hba   *phba = vport->phba;
4781         struct lpfc_iocbq *iocb;
4782         struct lpfc_iocbq *abtsiocb;
4783         struct lpfc_scsi_buf *lpfc_cmd;
4784         IOCB_t *cmd, *icmd;
4785         int ret = SUCCESS, status = 0;
4786         struct lpfc_sli_ring *pring_s4;
4787         int ring_number, ret_val;
4788         unsigned long flags, iflags;
4789         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4790
4791         status = fc_block_scsi_eh(cmnd);
4792         if (status != 0 && status != SUCCESS)
4793                 return status;
4794
4795         spin_lock_irqsave(&phba->hbalock, flags);
4796         /* driver queued commands are in process of being flushed */
4797         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4798                 spin_unlock_irqrestore(&phba->hbalock, flags);
4799                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4800                         "3168 SCSI Layer abort requested I/O has been "
4801                         "flushed by LLD.\n");
4802                 return FAILED;
4803         }
4804
4805         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4806         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4807                 spin_unlock_irqrestore(&phba->hbalock, flags);
4808                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4809                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4810                          "x%x ID %d LUN %llu\n",
4811                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4812                 return SUCCESS;
4813         }
4814
4815         iocb = &lpfc_cmd->cur_iocbq;
4816         /* the command is in process of being cancelled */
4817         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4818                 spin_unlock_irqrestore(&phba->hbalock, flags);
4819                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4820                         "3169 SCSI Layer abort requested I/O has been "
4821                         "cancelled by LLD.\n");
4822                 return FAILED;
4823         }
4824         /*
4825          * If pCmd field of the corresponding lpfc_scsi_buf structure
4826          * points to a different SCSI command, then the driver has
4827          * already completed this command, but the midlayer did not
4828          * see the completion before the eh fired. Just return SUCCESS.
4829          */
4830         if (lpfc_cmd->pCmd != cmnd) {
4831                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4832                         "3170 SCSI Layer abort requested I/O has been "
4833                         "completed by LLD.\n");
4834                 goto out_unlock;
4835         }
4836
4837         BUG_ON(iocb->context1 != lpfc_cmd);
4838
4839         /* abort issued in recovery is still in progress */
4840         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4841                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4842                          "3389 SCSI Layer I/O Abort Request is pending\n");
4843                 spin_unlock_irqrestore(&phba->hbalock, flags);
4844                 goto wait_for_cmpl;
4845         }
4846
4847         abtsiocb = __lpfc_sli_get_iocbq(phba);
4848         if (abtsiocb == NULL) {
4849                 ret = FAILED;
4850                 goto out_unlock;
4851         }
4852
4853         /* Indicate the IO is being aborted by the driver. */
4854         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4855
4856         /*
4857          * The scsi command can not be in txq and it is in flight because the
4858          * pCmd is still pointig at the SCSI command we have to abort. There
4859          * is no need to search the txcmplq. Just send an abort to the FW.
4860          */
4861
4862         cmd = &iocb->iocb;
4863         icmd = &abtsiocb->iocb;
4864         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4865         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4866         if (phba->sli_rev == LPFC_SLI_REV4)
4867                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4868         else
4869                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4870
4871         icmd->ulpLe = 1;
4872         icmd->ulpClass = cmd->ulpClass;
4873
4874         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4875         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4876         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4877
4878         if (lpfc_is_link_up(phba))
4879                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4880         else
4881                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4882
4883         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4884         abtsiocb->vport = vport;
4885         if (phba->sli_rev == LPFC_SLI_REV4) {
4886                 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
4887                 pring_s4 = &phba->sli.ring[ring_number];
4888                 /* Note: both hbalock and ring_lock must be set here */
4889                 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4890                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4891                                                 abtsiocb, 0);
4892                 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4893         } else {
4894                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4895                                                 abtsiocb, 0);
4896         }
4897         /* no longer need the lock after this point */
4898         spin_unlock_irqrestore(&phba->hbalock, flags);
4899
4900
4901         if (ret_val == IOCB_ERROR) {
4902                 lpfc_sli_release_iocbq(phba, abtsiocb);
4903                 ret = FAILED;
4904                 goto out;
4905         }
4906
4907         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4908                 lpfc_sli_handle_fast_ring_event(phba,
4909                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4910
4911 wait_for_cmpl:
4912         lpfc_cmd->waitq = &waitq;
4913         /* Wait for abort to complete */
4914         wait_event_timeout(waitq,
4915                           (lpfc_cmd->pCmd != cmnd),
4916                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4917
4918         spin_lock_irqsave(shost->host_lock, flags);
4919         lpfc_cmd->waitq = NULL;
4920         spin_unlock_irqrestore(shost->host_lock, flags);
4921
4922         if (lpfc_cmd->pCmd == cmnd) {
4923                 ret = FAILED;
4924                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4925                                  "0748 abort handler timed out waiting "
4926                                  "for abortng I/O (xri:x%x) to complete: "
4927                                  "ret %#x, ID %d, LUN %llu\n",
4928                                  iocb->sli4_xritag, ret,
4929                                  cmnd->device->id, cmnd->device->lun);
4930         }
4931         goto out;
4932
4933 out_unlock:
4934         spin_unlock_irqrestore(&phba->hbalock, flags);
4935 out:
4936         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4937                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4938                          "LUN %llu\n", ret, cmnd->device->id,
4939                          cmnd->device->lun);
4940         return ret;
4941 }
4942
4943 static char *
4944 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4945 {
4946         switch (task_mgmt_cmd) {
4947         case FCP_ABORT_TASK_SET:
4948                 return "ABORT_TASK_SET";
4949         case FCP_CLEAR_TASK_SET:
4950                 return "FCP_CLEAR_TASK_SET";
4951         case FCP_BUS_RESET:
4952                 return "FCP_BUS_RESET";
4953         case FCP_LUN_RESET:
4954                 return "FCP_LUN_RESET";
4955         case FCP_TARGET_RESET:
4956                 return "FCP_TARGET_RESET";
4957         case FCP_CLEAR_ACA:
4958                 return "FCP_CLEAR_ACA";
4959         case FCP_TERMINATE_TASK:
4960                 return "FCP_TERMINATE_TASK";
4961         default:
4962                 return "unknown";
4963         }
4964 }
4965
4966
4967 /**
4968  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4969  * @vport: The virtual port for which this call is being executed.
4970  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4971  *
4972  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4973  *
4974  * Return code :
4975  *   0x2003 - Error
4976  *   0x2002 - Success
4977  **/
4978 static int
4979 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4980 {
4981         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4982         uint32_t rsp_info;
4983         uint32_t rsp_len;
4984         uint8_t  rsp_info_code;
4985         int ret = FAILED;
4986
4987
4988         if (fcprsp == NULL)
4989                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4990                                  "0703 fcp_rsp is missing\n");
4991         else {
4992                 rsp_info = fcprsp->rspStatus2;
4993                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4994                 rsp_info_code = fcprsp->rspInfo3;
4995
4996
4997                 lpfc_printf_vlog(vport, KERN_INFO,
4998                                  LOG_FCP,
4999                                  "0706 fcp_rsp valid 0x%x,"
5000                                  " rsp len=%d code 0x%x\n",
5001                                  rsp_info,
5002                                  rsp_len, rsp_info_code);
5003
5004                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
5005                         switch (rsp_info_code) {
5006                         case RSP_NO_FAILURE:
5007                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5008                                                  "0715 Task Mgmt No Failure\n");
5009                                 ret = SUCCESS;
5010                                 break;
5011                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
5012                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5013                                                  "0716 Task Mgmt Target "
5014                                                 "reject\n");
5015                                 break;
5016                         case RSP_TM_NOT_COMPLETED: /* TM failed */
5017                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5018                                                  "0717 Task Mgmt Target "
5019                                                 "failed TM\n");
5020                                 break;
5021                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
5022                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5023                                                  "0718 Task Mgmt to invalid "
5024                                                 "LUN\n");
5025                                 break;
5026                         }
5027                 }
5028         }
5029         return ret;
5030 }
5031
5032
5033 /**
5034  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5035  * @vport: The virtual port for which this call is being executed.
5036  * @rdata: Pointer to remote port local data
5037  * @tgt_id: Target ID of remote device.
5038  * @lun_id: Lun number for the TMF
5039  * @task_mgmt_cmd: type of TMF to send
5040  *
5041  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5042  * a remote port.
5043  *
5044  * Return Code:
5045  *   0x2003 - Error
5046  *   0x2002 - Success.
5047  **/
5048 static int
5049 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
5050                     unsigned  tgt_id, uint64_t lun_id,
5051                     uint8_t task_mgmt_cmd)
5052 {
5053         struct lpfc_hba   *phba = vport->phba;
5054         struct lpfc_scsi_buf *lpfc_cmd;
5055         struct lpfc_iocbq *iocbq;
5056         struct lpfc_iocbq *iocbqrsp;
5057         struct lpfc_nodelist *pnode = rdata->pnode;
5058         int ret;
5059         int status;
5060
5061         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5062                 return FAILED;
5063
5064         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
5065         if (lpfc_cmd == NULL)
5066                 return FAILED;
5067         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5068         lpfc_cmd->rdata = rdata;
5069
5070         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5071                                            task_mgmt_cmd);
5072         if (!status) {
5073                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5074                 return FAILED;
5075         }
5076
5077         iocbq = &lpfc_cmd->cur_iocbq;
5078         iocbqrsp = lpfc_sli_get_iocbq(phba);
5079         if (iocbqrsp == NULL) {
5080                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5081                 return FAILED;
5082         }
5083         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5084
5085         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5086                          "0702 Issue %s to TGT %d LUN %llu "
5087                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5088                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5089                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5090                          iocbq->iocb_flag);
5091
5092         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5093                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5094         if ((status != IOCB_SUCCESS) ||
5095             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5096                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5097                          "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) "
5098                          "iocb_flag x%x\n",
5099                          lpfc_taskmgmt_name(task_mgmt_cmd),
5100                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
5101                          iocbqrsp->iocb.un.ulpWord[4],
5102                          iocbq->iocb_flag);
5103                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5104                 if (status == IOCB_SUCCESS) {
5105                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5106                                 /* Something in the FCP_RSP was invalid.
5107                                  * Check conditions */
5108                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5109                         else
5110                                 ret = FAILED;
5111                 } else if (status == IOCB_TIMEDOUT) {
5112                         ret = TIMEOUT_ERROR;
5113                 } else {
5114                         ret = FAILED;
5115                 }
5116                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
5117         } else
5118                 ret = SUCCESS;
5119
5120         lpfc_sli_release_iocbq(phba, iocbqrsp);
5121
5122         if (ret != TIMEOUT_ERROR)
5123                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5124
5125         return ret;
5126 }
5127
5128 /**
5129  * lpfc_chk_tgt_mapped -
5130  * @vport: The virtual port to check on
5131  * @cmnd: Pointer to scsi_cmnd data structure.
5132  *
5133  * This routine delays until the scsi target (aka rport) for the
5134  * command exists (is present and logged in) or we declare it non-existent.
5135  *
5136  * Return code :
5137  *  0x2003 - Error
5138  *  0x2002 - Success
5139  **/
5140 static int
5141 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5142 {
5143         struct lpfc_rport_data *rdata;
5144         struct lpfc_nodelist *pnode;
5145         unsigned long later;
5146
5147         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5148         if (!rdata) {
5149                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5150                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5151                 return FAILED;
5152         }
5153         pnode = rdata->pnode;
5154         /*
5155          * If target is not in a MAPPED state, delay until
5156          * target is rediscovered or devloss timeout expires.
5157          */
5158         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5159         while (time_after(later, jiffies)) {
5160                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5161                         return FAILED;
5162                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5163                         return SUCCESS;
5164                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5165                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5166                 if (!rdata)
5167                         return FAILED;
5168                 pnode = rdata->pnode;
5169         }
5170         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5171             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5172                 return FAILED;
5173         return SUCCESS;
5174 }
5175
5176 /**
5177  * lpfc_reset_flush_io_context -
5178  * @vport: The virtual port (scsi_host) for the flush context
5179  * @tgt_id: If aborting by Target contect - specifies the target id
5180  * @lun_id: If aborting by Lun context - specifies the lun id
5181  * @context: specifies the context level to flush at.
5182  *
5183  * After a reset condition via TMF, we need to flush orphaned i/o
5184  * contexts from the adapter. This routine aborts any contexts
5185  * outstanding, then waits for their completions. The wait is
5186  * bounded by devloss_tmo though.
5187  *
5188  * Return code :
5189  *  0x2003 - Error
5190  *  0x2002 - Success
5191  **/
5192 static int
5193 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5194                         uint64_t lun_id, lpfc_ctx_cmd context)
5195 {
5196         struct lpfc_hba   *phba = vport->phba;
5197         unsigned long later;
5198         int cnt;
5199
5200         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5201         if (cnt)
5202                 lpfc_sli_abort_taskmgmt(vport,
5203                                         &phba->sli.ring[phba->sli.fcp_ring],
5204                                         tgt_id, lun_id, context);
5205         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5206         while (time_after(later, jiffies) && cnt) {
5207                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5208                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5209         }
5210         if (cnt) {
5211                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5212                         "0724 I/O flush failure for context %s : cnt x%x\n",
5213                         ((context == LPFC_CTX_LUN) ? "LUN" :
5214                          ((context == LPFC_CTX_TGT) ? "TGT" :
5215                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5216                         cnt);
5217                 return FAILED;
5218         }
5219         return SUCCESS;
5220 }
5221
5222 /**
5223  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5224  * @cmnd: Pointer to scsi_cmnd data structure.
5225  *
5226  * This routine does a device reset by sending a LUN_RESET task management
5227  * command.
5228  *
5229  * Return code :
5230  *  0x2003 - Error
5231  *  0x2002 - Success
5232  **/
5233 static int
5234 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5235 {
5236         struct Scsi_Host  *shost = cmnd->device->host;
5237         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5238         struct lpfc_rport_data *rdata;
5239         struct lpfc_nodelist *pnode;
5240         unsigned tgt_id = cmnd->device->id;
5241         uint64_t lun_id = cmnd->device->lun;
5242         struct lpfc_scsi_event_header scsi_event;
5243         int status;
5244
5245         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5246         if (!rdata) {
5247                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5248                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
5249                 return FAILED;
5250         }
5251         pnode = rdata->pnode;
5252         status = fc_block_scsi_eh(cmnd);
5253         if (status != 0 && status != SUCCESS)
5254                 return status;
5255
5256         status = lpfc_chk_tgt_mapped(vport, cmnd);
5257         if (status == FAILED) {
5258                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5259                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5260                 return FAILED;
5261         }
5262
5263         scsi_event.event_type = FC_REG_SCSI_EVENT;
5264         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5265         scsi_event.lun = lun_id;
5266         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5267         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5268
5269         fc_host_post_vendor_event(shost, fc_get_event_number(),
5270                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5271
5272         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5273                                                 FCP_LUN_RESET);
5274
5275         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5276                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5277                          "return x%x\n", tgt_id, lun_id, status);
5278
5279         /*
5280          * We have to clean up i/o as : they may be orphaned by the TMF;
5281          * or if the TMF failed, they may be in an indeterminate state.
5282          * So, continue on.
5283          * We will report success if all the i/o aborts successfully.
5284          */
5285         if (status == SUCCESS)
5286                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5287                                                 LPFC_CTX_LUN);
5288
5289         return status;
5290 }
5291
5292 /**
5293  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5294  * @cmnd: Pointer to scsi_cmnd data structure.
5295  *
5296  * This routine does a target reset by sending a TARGET_RESET task management
5297  * command.
5298  *
5299  * Return code :
5300  *  0x2003 - Error
5301  *  0x2002 - Success
5302  **/
5303 static int
5304 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5305 {
5306         struct Scsi_Host  *shost = cmnd->device->host;
5307         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5308         struct lpfc_rport_data *rdata;
5309         struct lpfc_nodelist *pnode;
5310         unsigned tgt_id = cmnd->device->id;
5311         uint64_t lun_id = cmnd->device->lun;
5312         struct lpfc_scsi_event_header scsi_event;
5313         int status;
5314
5315         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5316         if (!rdata) {
5317                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5318                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5319                 return FAILED;
5320         }
5321         pnode = rdata->pnode;
5322         status = fc_block_scsi_eh(cmnd);
5323         if (status != 0 && status != SUCCESS)
5324                 return status;
5325
5326         status = lpfc_chk_tgt_mapped(vport, cmnd);
5327         if (status == FAILED) {
5328                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5329                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5330                 return FAILED;
5331         }
5332
5333         scsi_event.event_type = FC_REG_SCSI_EVENT;
5334         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5335         scsi_event.lun = 0;
5336         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5337         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5338
5339         fc_host_post_vendor_event(shost, fc_get_event_number(),
5340                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5341
5342         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5343                                         FCP_TARGET_RESET);
5344
5345         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5346                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5347                          "return x%x\n", tgt_id, lun_id, status);
5348
5349         /*
5350          * We have to clean up i/o as : they may be orphaned by the TMF;
5351          * or if the TMF failed, they may be in an indeterminate state.
5352          * So, continue on.
5353          * We will report success if all the i/o aborts successfully.
5354          */
5355         if (status == SUCCESS)
5356                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5357                                           LPFC_CTX_TGT);
5358         return status;
5359 }
5360
5361 /**
5362  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5363  * @cmnd: Pointer to scsi_cmnd data structure.
5364  *
5365  * This routine does target reset to all targets on @cmnd->device->host.
5366  * This emulates Parallel SCSI Bus Reset Semantics.
5367  *
5368  * Return code :
5369  *  0x2003 - Error
5370  *  0x2002 - Success
5371  **/
5372 static int
5373 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5374 {
5375         struct Scsi_Host  *shost = cmnd->device->host;
5376         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5377         struct lpfc_nodelist *ndlp = NULL;
5378         struct lpfc_scsi_event_header scsi_event;
5379         int match;
5380         int ret = SUCCESS, status, i;
5381
5382         scsi_event.event_type = FC_REG_SCSI_EVENT;
5383         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5384         scsi_event.lun = 0;
5385         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5386         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5387
5388         fc_host_post_vendor_event(shost, fc_get_event_number(),
5389                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5390
5391         status = fc_block_scsi_eh(cmnd);
5392         if (status != 0 && status != SUCCESS)
5393                 return status;
5394
5395         /*
5396          * Since the driver manages a single bus device, reset all
5397          * targets known to the driver.  Should any target reset
5398          * fail, this routine returns failure to the midlayer.
5399          */
5400         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5401                 /* Search for mapped node by target ID */
5402                 match = 0;
5403                 spin_lock_irq(shost->host_lock);
5404                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5405                         if (!NLP_CHK_NODE_ACT(ndlp))
5406                                 continue;
5407                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5408                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5409                                 continue;
5410                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5411                             ndlp->nlp_sid == i &&
5412                             ndlp->rport) {
5413                                 match = 1;
5414                                 break;
5415                         }
5416                 }
5417                 spin_unlock_irq(shost->host_lock);
5418                 if (!match)
5419                         continue;
5420
5421                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5422                                         i, 0, FCP_TARGET_RESET);
5423
5424                 if (status != SUCCESS) {
5425                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5426                                          "0700 Bus Reset on target %d failed\n",
5427                                          i);
5428                         ret = FAILED;
5429                 }
5430         }
5431         /*
5432          * We have to clean up i/o as : they may be orphaned by the TMFs
5433          * above; or if any of the TMFs failed, they may be in an
5434          * indeterminate state.
5435          * We will report success if all the i/o aborts successfully.
5436          */
5437
5438         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5439         if (status != SUCCESS)
5440                 ret = FAILED;
5441
5442         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5443                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5444         return ret;
5445 }
5446
5447 /**
5448  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5449  * @cmnd: Pointer to scsi_cmnd data structure.
5450  *
5451  * This routine does host reset to the adaptor port. It brings the HBA
5452  * offline, performs a board restart, and then brings the board back online.
5453  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5454  * reject all outstanding SCSI commands to the host and error returned
5455  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5456  * of error handling, it will only return error if resetting of the adapter
5457  * is not successful; in all other cases, will return success.
5458  *
5459  * Return code :
5460  *  0x2003 - Error
5461  *  0x2002 - Success
5462  **/
5463 static int
5464 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5465 {
5466         struct Scsi_Host *shost = cmnd->device->host;
5467         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5468         struct lpfc_hba *phba = vport->phba;
5469         int rc, ret = SUCCESS;
5470
5471         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5472                          "3172 SCSI layer issued Host Reset Data:\n");
5473
5474         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5475         lpfc_offline(phba);
5476         rc = lpfc_sli_brdrestart(phba);
5477         if (rc)
5478                 ret = FAILED;
5479         rc = lpfc_online(phba);
5480         if (rc)
5481                 ret = FAILED;
5482         lpfc_unblock_mgmt_io(phba);
5483
5484         if (ret == FAILED) {
5485                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5486                                  "3323 Failed host reset, bring it offline\n");
5487                 lpfc_sli4_offline_eratt(phba);
5488         }
5489         return ret;
5490 }
5491
5492 /**
5493  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5494  * @sdev: Pointer to scsi_device.
5495  *
5496  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5497  * globally available list of scsi buffers. This routine also makes sure scsi
5498  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5499  * of scsi buffer exists for the lifetime of the driver.
5500  *
5501  * Return codes:
5502  *   non-0 - Error
5503  *   0 - Success
5504  **/
5505 static int
5506 lpfc_slave_alloc(struct scsi_device *sdev)
5507 {
5508         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5509         struct lpfc_hba   *phba = vport->phba;
5510         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5511         uint32_t total = 0;
5512         uint32_t num_to_alloc = 0;
5513         int num_allocated = 0;
5514         uint32_t sdev_cnt;
5515         struct lpfc_device_data *device_data;
5516         unsigned long flags;
5517         struct lpfc_name target_wwpn;
5518
5519         if (!rport || fc_remote_port_chkready(rport))
5520                 return -ENXIO;
5521
5522         if (phba->cfg_fof) {
5523
5524                 /*
5525                  * Check to see if the device data structure for the lun
5526                  * exists.  If not, create one.
5527                  */
5528
5529                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5530                 spin_lock_irqsave(&phba->devicelock, flags);
5531                 device_data = __lpfc_get_device_data(phba,
5532                                                      &phba->luns,
5533                                                      &vport->fc_portname,
5534                                                      &target_wwpn,
5535                                                      sdev->lun);
5536                 if (!device_data) {
5537                         spin_unlock_irqrestore(&phba->devicelock, flags);
5538                         device_data = lpfc_create_device_data(phba,
5539                                                         &vport->fc_portname,
5540                                                         &target_wwpn,
5541                                                         sdev->lun, true);
5542                         if (!device_data)
5543                                 return -ENOMEM;
5544                         spin_lock_irqsave(&phba->devicelock, flags);
5545                         list_add_tail(&device_data->listentry, &phba->luns);
5546                 }
5547                 device_data->rport_data = rport->dd_data;
5548                 device_data->available = true;
5549                 spin_unlock_irqrestore(&phba->devicelock, flags);
5550                 sdev->hostdata = device_data;
5551         } else {
5552                 sdev->hostdata = rport->dd_data;
5553         }
5554         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5555
5556         /*
5557          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5558          * available list of scsi buffers.  Don't allocate more than the
5559          * HBA limit conveyed to the midlayer via the host structure.  The
5560          * formula accounts for the lun_queue_depth + error handlers + 1
5561          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5562          */
5563         total = phba->total_scsi_bufs;
5564         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5565
5566         /* If allocated buffers are enough do nothing */
5567         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5568                 return 0;
5569
5570         /* Allow some exchanges to be available always to complete discovery */
5571         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5572                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5573                                  "0704 At limitation of %d preallocated "
5574                                  "command buffers\n", total);
5575                 return 0;
5576         /* Allow some exchanges to be available always to complete discovery */
5577         } else if (total + num_to_alloc >
5578                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5579                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5580                                  "0705 Allocation request of %d "
5581                                  "command buffers will exceed max of %d.  "
5582                                  "Reducing allocation request to %d.\n",
5583                                  num_to_alloc, phba->cfg_hba_queue_depth,
5584                                  (phba->cfg_hba_queue_depth - total));
5585                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5586         }
5587         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5588         if (num_to_alloc != num_allocated) {
5589                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5590                                          "0708 Allocation request of %d "
5591                                          "command buffers did not succeed.  "
5592                                          "Allocated %d buffers.\n",
5593                                          num_to_alloc, num_allocated);
5594         }
5595         if (num_allocated > 0)
5596                 phba->total_scsi_bufs += num_allocated;
5597         return 0;
5598 }
5599
5600 /**
5601  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5602  * @sdev: Pointer to scsi_device.
5603  *
5604  * This routine configures following items
5605  *   - Tag command queuing support for @sdev if supported.
5606  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5607  *
5608  * Return codes:
5609  *   0 - Success
5610  **/
5611 static int
5612 lpfc_slave_configure(struct scsi_device *sdev)
5613 {
5614         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5615         struct lpfc_hba   *phba = vport->phba;
5616
5617         if (sdev->tagged_supported)
5618                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
5619         else
5620                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
5621
5622         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5623                 lpfc_sli_handle_fast_ring_event(phba,
5624                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5625                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5626                         lpfc_poll_rearm_timer(phba);
5627         }
5628
5629         return 0;
5630 }
5631
5632 /**
5633  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5634  * @sdev: Pointer to scsi_device.
5635  *
5636  * This routine sets @sdev hostatdata filed to null.
5637  **/
5638 static void
5639 lpfc_slave_destroy(struct scsi_device *sdev)
5640 {
5641         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5642         struct lpfc_hba   *phba = vport->phba;
5643         unsigned long flags;
5644         struct lpfc_device_data *device_data = sdev->hostdata;
5645
5646         atomic_dec(&phba->sdev_cnt);
5647         if ((phba->cfg_fof) && (device_data)) {
5648                 spin_lock_irqsave(&phba->devicelock, flags);
5649                 device_data->available = false;
5650                 if (!device_data->oas_enabled)
5651                         lpfc_delete_device_data(phba, device_data);
5652                 spin_unlock_irqrestore(&phba->devicelock, flags);
5653         }
5654         sdev->hostdata = NULL;
5655         return;
5656 }
5657
5658 /**
5659  * lpfc_create_device_data - creates and initializes device data structure for OAS
5660  * @pha: Pointer to host bus adapter structure.
5661  * @vport_wwpn: Pointer to vport's wwpn information
5662  * @target_wwpn: Pointer to target's wwpn information
5663  * @lun: Lun on target
5664  * @atomic_create: Flag to indicate if memory should be allocated using the
5665  *                GFP_ATOMIC flag or not.
5666  *
5667  * This routine creates a device data structure which will contain identifying
5668  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5669  * whether or not the corresponding lun is available by the system,
5670  * and pointer to the rport data.
5671  *
5672  * Return codes:
5673  *   NULL - Error
5674  *   Pointer to lpfc_device_data - Success
5675  **/
5676 struct lpfc_device_data*
5677 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5678                         struct lpfc_name *target_wwpn, uint64_t lun,
5679                         bool atomic_create)
5680 {
5681
5682         struct lpfc_device_data *lun_info;
5683         int memory_flags;
5684
5685         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5686             !(phba->cfg_fof))
5687                 return NULL;
5688
5689         /* Attempt to create the device data to contain lun info */
5690
5691         if (atomic_create)
5692                 memory_flags = GFP_ATOMIC;
5693         else
5694                 memory_flags = GFP_KERNEL;
5695         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5696         if (!lun_info)
5697                 return NULL;
5698         INIT_LIST_HEAD(&lun_info->listentry);
5699         lun_info->rport_data  = NULL;
5700         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5701                sizeof(struct lpfc_name));
5702         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5703                sizeof(struct lpfc_name));
5704         lun_info->device_id.lun = lun;
5705         lun_info->oas_enabled = false;
5706         lun_info->available = false;
5707         return lun_info;
5708 }
5709
5710 /**
5711  * lpfc_delete_device_data - frees a device data structure for OAS
5712  * @pha: Pointer to host bus adapter structure.
5713  * @lun_info: Pointer to device data structure to free.
5714  *
5715  * This routine frees the previously allocated device data structure passed.
5716  *
5717  **/
5718 void
5719 lpfc_delete_device_data(struct lpfc_hba *phba,
5720                         struct lpfc_device_data *lun_info)
5721 {
5722
5723         if (unlikely(!phba) || !lun_info  ||
5724             !(phba->cfg_fof))
5725                 return;
5726
5727         if (!list_empty(&lun_info->listentry))
5728                 list_del(&lun_info->listentry);
5729         mempool_free(lun_info, phba->device_data_mem_pool);
5730         return;
5731 }
5732
5733 /**
5734  * __lpfc_get_device_data - returns the device data for the specified lun
5735  * @pha: Pointer to host bus adapter structure.
5736  * @list: Point to list to search.
5737  * @vport_wwpn: Pointer to vport's wwpn information
5738  * @target_wwpn: Pointer to target's wwpn information
5739  * @lun: Lun on target
5740  *
5741  * This routine searches the list passed for the specified lun's device data.
5742  * This function does not hold locks, it is the responsibility of the caller
5743  * to ensure the proper lock is held before calling the function.
5744  *
5745  * Return codes:
5746  *   NULL - Error
5747  *   Pointer to lpfc_device_data - Success
5748  **/
5749 struct lpfc_device_data*
5750 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5751                        struct lpfc_name *vport_wwpn,
5752                        struct lpfc_name *target_wwpn, uint64_t lun)
5753 {
5754
5755         struct lpfc_device_data *lun_info;
5756
5757         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5758             !phba->cfg_fof)
5759                 return NULL;
5760
5761         /* Check to see if the lun is already enabled for OAS. */
5762
5763         list_for_each_entry(lun_info, list, listentry) {
5764                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5765                             sizeof(struct lpfc_name)) == 0) &&
5766                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5767                             sizeof(struct lpfc_name)) == 0) &&
5768                     (lun_info->device_id.lun == lun))
5769                         return lun_info;
5770         }
5771
5772         return NULL;
5773 }
5774
5775 /**
5776  * lpfc_find_next_oas_lun - searches for the next oas lun
5777  * @pha: Pointer to host bus adapter structure.
5778  * @vport_wwpn: Pointer to vport's wwpn information
5779  * @target_wwpn: Pointer to target's wwpn information
5780  * @starting_lun: Pointer to the lun to start searching for
5781  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5782  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5783  * @found_lun: Pointer to the found lun.
5784  * @found_lun_status: Pointer to status of the found lun.
5785  *
5786  * This routine searches the luns list for the specified lun
5787  * or the first lun for the vport/target.  If the vport wwpn contains
5788  * a zero value then a specific vport is not specified. In this case
5789  * any vport which contains the lun will be considered a match.  If the
5790  * target wwpn contains a zero value then a specific target is not specified.
5791  * In this case any target which contains the lun will be considered a
5792  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5793  * are returned.  The function will also return the next lun if available.
5794  * If the next lun is not found, starting_lun parameter will be set to
5795  * NO_MORE_OAS_LUN.
5796  *
5797  * Return codes:
5798  *   non-0 - Error
5799  *   0 - Success
5800  **/
5801 bool
5802 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5803                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5804                        struct lpfc_name *found_vport_wwpn,
5805                        struct lpfc_name *found_target_wwpn,
5806                        uint64_t *found_lun,
5807                        uint32_t *found_lun_status)
5808 {
5809
5810         unsigned long flags;
5811         struct lpfc_device_data *lun_info;
5812         struct lpfc_device_id *device_id;
5813         uint64_t lun;
5814         bool found = false;
5815
5816         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5817             !starting_lun || !found_vport_wwpn ||
5818             !found_target_wwpn || !found_lun || !found_lun_status ||
5819             (*starting_lun == NO_MORE_OAS_LUN) ||
5820             !phba->cfg_fof)
5821                 return false;
5822
5823         lun = *starting_lun;
5824         *found_lun = NO_MORE_OAS_LUN;
5825         *starting_lun = NO_MORE_OAS_LUN;
5826
5827         /* Search for lun or the lun closet in value */
5828
5829         spin_lock_irqsave(&phba->devicelock, flags);
5830         list_for_each_entry(lun_info, &phba->luns, listentry) {
5831                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5832                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5833                             sizeof(struct lpfc_name)) == 0)) &&
5834                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5835                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5836                             sizeof(struct lpfc_name)) == 0)) &&
5837                     (lun_info->oas_enabled)) {
5838                         device_id = &lun_info->device_id;
5839                         if ((!found) &&
5840                             ((lun == FIND_FIRST_OAS_LUN) ||
5841                              (device_id->lun == lun))) {
5842                                 *found_lun = device_id->lun;
5843                                 memcpy(found_vport_wwpn,
5844                                        &device_id->vport_wwpn,
5845                                        sizeof(struct lpfc_name));
5846                                 memcpy(found_target_wwpn,
5847                                        &device_id->target_wwpn,
5848                                        sizeof(struct lpfc_name));
5849                                 if (lun_info->available)
5850                                         *found_lun_status =
5851                                                 OAS_LUN_STATUS_EXISTS;
5852                                 else
5853                                         *found_lun_status = 0;
5854                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5855                                         memset(vport_wwpn, 0x0,
5856                                                sizeof(struct lpfc_name));
5857                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5858                                         memset(target_wwpn, 0x0,
5859                                                sizeof(struct lpfc_name));
5860                                 found = true;
5861                         } else if (found) {
5862                                 *starting_lun = device_id->lun;
5863                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5864                                        sizeof(struct lpfc_name));
5865                                 memcpy(target_wwpn, &device_id->target_wwpn,
5866                                        sizeof(struct lpfc_name));
5867                                 break;
5868                         }
5869                 }
5870         }
5871         spin_unlock_irqrestore(&phba->devicelock, flags);
5872         return found;
5873 }
5874
5875 /**
5876  * lpfc_enable_oas_lun - enables a lun for OAS operations
5877  * @pha: Pointer to host bus adapter structure.
5878  * @vport_wwpn: Pointer to vport's wwpn information
5879  * @target_wwpn: Pointer to target's wwpn information
5880  * @lun: Lun
5881  *
5882  * This routine enables a lun for oas operations.  The routines does so by
5883  * doing the following :
5884  *
5885  *   1) Checks to see if the device data for the lun has been created.
5886  *   2) If found, sets the OAS enabled flag if not set and returns.
5887  *   3) Otherwise, creates a device data structure.
5888  *   4) If successfully created, indicates the device data is for an OAS lun,
5889  *   indicates the lun is not available and add to the list of luns.
5890  *
5891  * Return codes:
5892  *   false - Error
5893  *   true - Success
5894  **/
5895 bool
5896 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5897                     struct lpfc_name *target_wwpn, uint64_t lun)
5898 {
5899
5900         struct lpfc_device_data *lun_info;
5901         unsigned long flags;
5902
5903         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5904             !phba->cfg_fof)
5905                 return false;
5906
5907         spin_lock_irqsave(&phba->devicelock, flags);
5908
5909         /* Check to see if the device data for the lun has been created */
5910         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5911                                           target_wwpn, lun);
5912         if (lun_info) {
5913                 if (!lun_info->oas_enabled)
5914                         lun_info->oas_enabled = true;
5915                 spin_unlock_irqrestore(&phba->devicelock, flags);
5916                 return true;
5917         }
5918
5919         /* Create an lun info structure and add to list of luns */
5920         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5921                                            false);
5922         if (lun_info) {
5923                 lun_info->oas_enabled = true;
5924                 lun_info->available = false;
5925                 list_add_tail(&lun_info->listentry, &phba->luns);
5926                 spin_unlock_irqrestore(&phba->devicelock, flags);
5927                 return true;
5928         }
5929         spin_unlock_irqrestore(&phba->devicelock, flags);
5930         return false;
5931 }
5932
5933 /**
5934  * lpfc_disable_oas_lun - disables a lun for OAS operations
5935  * @pha: Pointer to host bus adapter structure.
5936  * @vport_wwpn: Pointer to vport's wwpn information
5937  * @target_wwpn: Pointer to target's wwpn information
5938  * @lun: Lun
5939  *
5940  * This routine disables a lun for oas operations.  The routines does so by
5941  * doing the following :
5942  *
5943  *   1) Checks to see if the device data for the lun is created.
5944  *   2) If present, clears the flag indicating this lun is for OAS.
5945  *   3) If the lun is not available by the system, the device data is
5946  *   freed.
5947  *
5948  * Return codes:
5949  *   false - Error
5950  *   true - Success
5951  **/
5952 bool
5953 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5954                      struct lpfc_name *target_wwpn, uint64_t lun)
5955 {
5956
5957         struct lpfc_device_data *lun_info;
5958         unsigned long flags;
5959
5960         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5961             !phba->cfg_fof)
5962                 return false;
5963
5964         spin_lock_irqsave(&phba->devicelock, flags);
5965
5966         /* Check to see if the lun is available. */
5967         lun_info = __lpfc_get_device_data(phba,
5968                                           &phba->luns, vport_wwpn,
5969                                           target_wwpn, lun);
5970         if (lun_info) {
5971                 lun_info->oas_enabled = false;
5972                 if (!lun_info->available)
5973                         lpfc_delete_device_data(phba, lun_info);
5974                 spin_unlock_irqrestore(&phba->devicelock, flags);
5975                 return true;
5976         }
5977
5978         spin_unlock_irqrestore(&phba->devicelock, flags);
5979         return false;
5980 }
5981
5982 struct scsi_host_template lpfc_template = {
5983         .module                 = THIS_MODULE,
5984         .name                   = LPFC_DRIVER_NAME,
5985         .info                   = lpfc_info,
5986         .queuecommand           = lpfc_queuecommand,
5987         .eh_abort_handler       = lpfc_abort_handler,
5988         .eh_device_reset_handler = lpfc_device_reset_handler,
5989         .eh_target_reset_handler = lpfc_target_reset_handler,
5990         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5991         .eh_host_reset_handler  = lpfc_host_reset_handler,
5992         .slave_alloc            = lpfc_slave_alloc,
5993         .slave_configure        = lpfc_slave_configure,
5994         .slave_destroy          = lpfc_slave_destroy,
5995         .scan_finished          = lpfc_scan_finished,
5996         .this_id                = -1,
5997         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5998         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5999         .use_clustering         = ENABLE_CLUSTERING,
6000         .shost_attrs            = lpfc_hba_attrs,
6001         .max_sectors            = 0xFFFF,
6002         .vendor_id              = LPFC_NL_VENDOR_ID,
6003         .change_queue_depth     = lpfc_change_queue_depth,
6004         .change_queue_type      = lpfc_change_queue_type,
6005 };
6006
6007 struct scsi_host_template lpfc_vport_template = {
6008         .module                 = THIS_MODULE,
6009         .name                   = LPFC_DRIVER_NAME,
6010         .info                   = lpfc_info,
6011         .queuecommand           = lpfc_queuecommand,
6012         .eh_abort_handler       = lpfc_abort_handler,
6013         .eh_device_reset_handler = lpfc_device_reset_handler,
6014         .eh_target_reset_handler = lpfc_target_reset_handler,
6015         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6016         .slave_alloc            = lpfc_slave_alloc,
6017         .slave_configure        = lpfc_slave_configure,
6018         .slave_destroy          = lpfc_slave_destroy,
6019         .scan_finished          = lpfc_scan_finished,
6020         .this_id                = -1,
6021         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6022         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6023         .use_clustering         = ENABLE_CLUSTERING,
6024         .shost_attrs            = lpfc_vport_attrs,
6025         .max_sectors            = 0xFFFF,
6026         .change_queue_depth     = lpfc_change_queue_depth,
6027         .change_queue_type      = lpfc_change_queue_type,
6028 };