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 static 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         unsigned long expires;
 384
 385         spin_lock_irqsave(&phba->hbalock, flags);
 386         atomic_inc(&phba->num_rsrc_err);
 387         phba->last_rsrc_error_time = jiffies;
 388
 389         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 390         if (time_after(expires, jiffies)) {
 391                 spin_unlock_irqrestore(&phba->hbalock, flags);
 392                 return;
 393         }
 394
 395         phba->last_ramp_down_time = jiffies;
 396
 397         spin_unlock_irqrestore(&phba->hbalock, flags);
 398
 399         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 400         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 401         if (!evt_posted)
 402                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 403         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 404
 405         if (!evt_posted)
 406                 lpfc_worker_wake_up(phba);
 407         return;
 408 }
 409
 410 /**
 411  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 412  * @phba: The Hba for which this call is being executed.
 413  *
 414  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 415  * thread.This routine reduces queue depth for all scsi device on each vport
 416  * associated with @phba.
 417  **/
 418 void
 419 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 420 {
 421         struct lpfc_vport **vports;
 422         struct Scsi_Host  *shost;
 423         struct scsi_device *sdev;
 424         unsigned long new_queue_depth;
 425         unsigned long num_rsrc_err, num_cmd_success;
 426         int i;
 427
 428         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 429         num_cmd_success = atomic_read(&phba->num_cmd_success);
 430
 431         /*
 432          * The error and success command counters are global per
 433          * driver instance.  If another handler has already
 434          * operated on this error event, just exit.
 435          */
 436         if (num_rsrc_err == 0)
 437                 return;
 438
 439         vports = lpfc_create_vport_work_array(phba);
 440         if (vports != NULL)
 441                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 442                         shost = lpfc_shost_from_vport(vports[i]);
 443                         shost_for_each_device(sdev, shost) {
 444                                 new_queue_depth =
 445                                         sdev->queue_depth * num_rsrc_err /
 446                                         (num_rsrc_err + num_cmd_success);
 447                                 if (!new_queue_depth)
 448                                         new_queue_depth = sdev->queue_depth - 1;
 449                                 else
 450                                         new_queue_depth = sdev->queue_depth -
 451                                                                 new_queue_depth;
 452                                 lpfc_change_queue_depth(sdev, new_queue_depth,
 453                                                         SCSI_QDEPTH_DEFAULT);
 454                         }
 455                 }
 456         lpfc_destroy_vport_work_array(phba, vports);
 457         atomic_set(&phba->num_rsrc_err, 0);
 458         atomic_set(&phba->num_cmd_success, 0);
 459 }
 460
 461 /**
 462  * lpfc_scsi_dev_block - set all scsi hosts to block state
 463  * @phba: Pointer to HBA context object.
 464  *
 465  * This function walks vport list and set each SCSI host to block state
 466  * by invoking fc_remote_port_delete() routine. This function is invoked
 467  * with EEH when device's PCI slot has been permanently disabled.
 468  **/
 469 void
 470 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 471 {
 472         struct lpfc_vport **vports;
 473         struct Scsi_Host  *shost;
 474         struct scsi_device *sdev;
 475         struct fc_rport *rport;
 476         int i;
 477
 478         vports = lpfc_create_vport_work_array(phba);
 479         if (vports != NULL)
 480                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 481                         shost = lpfc_shost_from_vport(vports[i]);
 482                         shost_for_each_device(sdev, shost) {
 483                                 rport = starget_to_rport(scsi_target(sdev));
 484                                 fc_remote_port_delete(rport);
 485                         }
 486                 }
 487         lpfc_destroy_vport_work_array(phba, vports);
 488 }
 489
 490 /**
 491  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 492  * @vport: The virtual port for which this call being executed.
 493  * @num_to_allocate: The requested number of buffers to allocate.
 494  *
 495  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 496  * the scsi buffer contains all the necessary information needed to initiate
 497  * a SCSI I/O. The non-DMAable buffer region contains information to build
 498  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 499  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 500  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 501  *
 502  * Return codes:
 503  *   int - number of scsi buffers that were allocated.
 504  *   0 = failure, less than num_to_alloc is a partial failure.
 505  **/
 506 static int
 507 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 508 {
 509         struct lpfc_hba *phba = vport->phba;
 510         struct lpfc_scsi_buf *psb;
 511         struct ulp_bde64 *bpl;
 512         IOCB_t *iocb;
 513         dma_addr_t pdma_phys_fcp_cmd;
 514         dma_addr_t pdma_phys_fcp_rsp;
 515         dma_addr_t pdma_phys_bpl;
 516         uint16_t iotag;
 517         int bcnt, bpl_size;
 518
 519         bpl_size = phba->cfg_sg_dma_buf_size -
 520                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 521
 522         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 523                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 524                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 525                          (int)sizeof(struct fcp_cmnd),
 526                          (int)sizeof(struct fcp_rsp), bpl_size);
 527
 528         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 529                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 530                 if (!psb)
 531                         break;
 532
 533                 /*
 534                  * Get memory from the pci pool to map the virt space to pci
 535                  * bus space for an I/O.  The DMA buffer includes space for the
 536                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 537                  * necessary to support the sg_tablesize.
 538                  */
 539                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 540                                         GFP_KERNEL, &psb->dma_handle);
 541                 if (!psb->data) {
 542                         kfree(psb);
 543                         break;
 544                 }
 545
 546                 /* Initialize virtual ptrs to dma_buf region. */
 547                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 548
 549                 /* Allocate iotag for psb->cur_iocbq. */
 550                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 551                 if (iotag == 0) {
 552                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 553                                         psb->data, psb->dma_handle);
 554                         kfree(psb);
 555                         break;
 556                 }
 557                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 558
 559                 psb->fcp_cmnd = psb->data;
 560                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 561                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 562                         sizeof(struct fcp_rsp);
 563
 564                 /* Initialize local short-hand pointers. */
 565                 bpl = psb->fcp_bpl;
 566                 pdma_phys_fcp_cmd = psb->dma_handle;
 567                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 568                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 569                         sizeof(struct fcp_rsp);
 570
 571                 /*
 572                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 573                  * are sg list bdes.  Initialize the first two and leave the
 574                  * rest for queuecommand.
 575                  */
 576                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 577                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 578                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 579                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 580                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 581
 582                 /* Setup the physical region for the FCP RSP */
 583                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 584                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 585                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 586                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 587                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 588
 589                 /*
 590                  * Since the IOCB for the FCP I/O is built into this
 591                  * lpfc_scsi_buf, initialize it with all known data now.
 592                  */
 593                 iocb = &psb->cur_iocbq.iocb;
 594                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 595                 if ((phba->sli_rev == 3) &&
 596                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 597                         /* fill in immediate fcp command BDE */
 598                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 599                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 600                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 601                                         unsli3.fcp_ext.icd);
 602                         iocb->un.fcpi64.bdl.addrHigh = 0;
 603                         iocb->ulpBdeCount = 0;
 604                         iocb->ulpLe = 0;
 605                         /* fill in response BDE */
 606                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 607                                                         BUFF_TYPE_BDE_64;
 608                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 609                                 sizeof(struct fcp_rsp);
 610                         iocb->unsli3.fcp_ext.rbde.addrLow =
 611                                 putPaddrLow(pdma_phys_fcp_rsp);
 612                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 613                                 putPaddrHigh(pdma_phys_fcp_rsp);
 614                 } else {
 615                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 616                         iocb->un.fcpi64.bdl.bdeSize =
 617                                         (2 * sizeof(struct ulp_bde64));
 618                         iocb->un.fcpi64.bdl.addrLow =
 619                                         putPaddrLow(pdma_phys_bpl);
 620                         iocb->un.fcpi64.bdl.addrHigh =
 621                                         putPaddrHigh(pdma_phys_bpl);
 622                         iocb->ulpBdeCount = 1;
 623                         iocb->ulpLe = 1;
 624                 }
 625                 iocb->ulpClass = CLASS3;
 626                 psb->status = IOSTAT_SUCCESS;
 627                 /* Put it back into the SCSI buffer list */
 628                 psb->cur_iocbq.context1  = psb;
 629                 lpfc_release_scsi_buf_s3(phba, psb);
 630
 631         }
 632
 633         return bcnt;
 634 }
 635
 636 /**
 637  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 638  * @vport: pointer to lpfc vport data structure.
 639  *
 640  * This routine is invoked by the vport cleanup for deletions and the cleanup
 641  * for an ndlp on removal.
 642  **/
 643 void
 644 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 645 {
 646         struct lpfc_hba *phba = vport->phba;
 647         struct lpfc_scsi_buf *psb, *next_psb;
 648         unsigned long iflag = 0;
 649
 650         spin_lock_irqsave(&phba->hbalock, iflag);
 651         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 652         list_for_each_entry_safe(psb, next_psb,
 653                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 654                 if (psb->rdata && psb->rdata->pnode
 655                         && psb->rdata->pnode->vport == vport)
 656                         psb->rdata = NULL;
 657         }
 658         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 659         spin_unlock_irqrestore(&phba->hbalock, iflag);
 660 }
 661
 662 /**
 663  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 664  * @phba: pointer to lpfc hba data structure.
 665  * @axri: pointer to the fcp xri abort wcqe structure.
 666  *
 667  * This routine is invoked by the worker thread to process a SLI4 fast-path
 668  * FCP aborted xri.
 669  **/
 670 void
 671 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 672                           struct sli4_wcqe_xri_aborted *axri)
 673 {
 674         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 675         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 676         struct lpfc_scsi_buf *psb, *next_psb;
 677         unsigned long iflag = 0;
 678         struct lpfc_iocbq *iocbq;
 679         int i;
 680         struct lpfc_nodelist *ndlp;
 681         int rrq_empty = 0;
 682         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 683
 684         spin_lock_irqsave(&phba->hbalock, iflag);
 685         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 686         list_for_each_entry_safe(psb, next_psb,
 687                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 688                 if (psb->cur_iocbq.sli4_xritag == xri) {
 689                         list_del(&psb->list);
 690                         psb->exch_busy = 0;
 691                         psb->status = IOSTAT_SUCCESS;
 692                         spin_unlock(
 693                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 694                         if (psb->rdata && psb->rdata->pnode)
 695                                 ndlp = psb->rdata->pnode;
 696                         else
 697                                 ndlp = NULL;
 698
 699                         rrq_empty = list_empty(&phba->active_rrq_list);
 700                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 701                         if (ndlp) {
 702                                 lpfc_set_rrq_active(phba, ndlp,
 703                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 704                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 705                         }
 706                         lpfc_release_scsi_buf_s4(phba, psb);
 707                         if (rrq_empty)
 708                                 lpfc_worker_wake_up(phba);
 709                         return;
 710                 }
 711         }
 712         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 713         for (i = 1; i <= phba->sli.last_iotag; i++) {
 714                 iocbq = phba->sli.iocbq_lookup[i];
 715
 716                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 717                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 718                         continue;
 719                 if (iocbq->sli4_xritag != xri)
 720                         continue;
 721                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 722                 psb->exch_busy = 0;
 723                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 724                 if (!list_empty(&pring->txq))
 725                         lpfc_worker_wake_up(phba);
 726                 return;
 727
 728         }
 729         spin_unlock_irqrestore(&phba->hbalock, iflag);
 730 }
 731
 732 /**
 733  * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
 734  * @phba: pointer to lpfc hba data structure.
 735  * @post_sblist: pointer to the scsi buffer list.
 736  *
 737  * This routine walks a list of scsi buffers that was passed in. It attempts
 738  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 739  * uses the non-embedded SGL block post mailbox commands to post to the port.
 740  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 741  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 742  * must be local list, thus no lock is needed when manipulate the list.
 743  *
 744  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 745  **/
 746 static int
 747 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 748                              struct list_head *post_sblist, int sb_count)
 749 {
 750         struct lpfc_scsi_buf *psb, *psb_next;
 751         int status, sgl_size;
 752         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 753         dma_addr_t pdma_phys_bpl1;
 754         int last_xritag = NO_XRI;
 755         LIST_HEAD(prep_sblist);
 756         LIST_HEAD(blck_sblist);
 757         LIST_HEAD(scsi_sblist);
 758
 759         /* sanity check */
 760         if (sb_count <= 0)
 761                 return -EINVAL;
 762
 763         sgl_size = phba->cfg_sg_dma_buf_size -
 764                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 765
 766         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 767                 list_del_init(&psb->list);
 768                 block_cnt++;
 769                 if ((last_xritag != NO_XRI) &&
 770                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 771                         /* a hole in xri block, form a sgl posting block */
 772                         list_splice_init(&prep_sblist, &blck_sblist);
 773                         post_cnt = block_cnt - 1;
 774                         /* prepare list for next posting block */
 775                         list_add_tail(&psb->list, &prep_sblist);
 776                         block_cnt = 1;
 777                 } else {
 778                         /* prepare list for next posting block */
 779                         list_add_tail(&psb->list, &prep_sblist);
 780                         /* enough sgls for non-embed sgl mbox command */
 781                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 782                                 list_splice_init(&prep_sblist, &blck_sblist);
 783                                 post_cnt = block_cnt;
 784                                 block_cnt = 0;
 785                         }
 786                 }
 787                 num_posting++;
 788                 last_xritag = psb->cur_iocbq.sli4_xritag;
 789
 790                 /* end of repost sgl list condition for SCSI buffers */
 791                 if (num_posting == sb_count) {
 792                         if (post_cnt == 0) {
 793                                 /* last sgl posting block */
 794                                 list_splice_init(&prep_sblist, &blck_sblist);
 795                                 post_cnt = block_cnt;
 796                         } else if (block_cnt == 1) {
 797                                 /* last single sgl with non-contiguous xri */
 798                                 if (sgl_size > SGL_PAGE_SIZE)
 799                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 800                                                                 SGL_PAGE_SIZE;
 801                                 else
 802                                         pdma_phys_bpl1 = 0;
 803                                 status = lpfc_sli4_post_sgl(phba,
 804                                                 psb->dma_phys_bpl,
 805                                                 pdma_phys_bpl1,
 806                                                 psb->cur_iocbq.sli4_xritag);
 807                                 if (status) {
 808                                         /* failure, put on abort scsi list */
 809                                         psb->exch_busy = 1;
 810                                 } else {
 811                                         /* success, put on SCSI buffer list */
 812                                         psb->exch_busy = 0;
 813                                         psb->status = IOSTAT_SUCCESS;
 814                                         num_posted++;
 815                                 }
 816                                 /* success, put on SCSI buffer sgl list */
 817                                 list_add_tail(&psb->list, &scsi_sblist);
 818                         }
 819                 }
 820
 821                 /* continue until a nembed page worth of sgls */
 822                 if (post_cnt == 0)
 823                         continue;
 824
 825                 /* post block of SCSI buffer list sgls */
 826                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 827                                                        post_cnt);
 828
 829                 /* don't reset xirtag due to hole in xri block */
 830                 if (block_cnt == 0)
 831                         last_xritag = NO_XRI;
 832
 833                 /* reset SCSI buffer post count for next round of posting */
 834                 post_cnt = 0;
 835
 836                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 837                 while (!list_empty(&blck_sblist)) {
 838                         list_remove_head(&blck_sblist, psb,
 839                                          struct lpfc_scsi_buf, list);
 840                         if (status) {
 841                                 /* failure, put on abort scsi list */
 842                                 psb->exch_busy = 1;
 843                         } else {
 844                                 /* success, put on SCSI buffer list */
 845                                 psb->exch_busy = 0;
 846                                 psb->status = IOSTAT_SUCCESS;
 847                                 num_posted++;
 848                         }
 849                         list_add_tail(&psb->list, &scsi_sblist);
 850                 }
 851         }
 852         /* Push SCSI buffers with sgl posted to the availble list */
 853         while (!list_empty(&scsi_sblist)) {
 854                 list_remove_head(&scsi_sblist, psb,
 855                                  struct lpfc_scsi_buf, list);
 856                 lpfc_release_scsi_buf_s4(phba, psb);
 857         }
 858         return num_posted;
 859 }
 860
 861 /**
 862  * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 863  * @phba: pointer to lpfc hba data structure.
 864  *
 865  * This routine walks the list of scsi buffers that have been allocated and
 866  * repost them to the port by using SGL block post. This is needed after a
 867  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 868  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 869  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 870  *
 871  * Returns: 0 = success, non-zero failure.
 872  **/
 873 int
 874 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 875 {
 876         LIST_HEAD(post_sblist);
 877         int num_posted, rc = 0;
 878
 879         /* get all SCSI buffers need to repost to a local list */
 880         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 881         spin_lock(&phba->scsi_buf_list_put_lock);
 882         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 883         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 884         spin_unlock(&phba->scsi_buf_list_put_lock);
 885         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 886
 887         /* post the list of scsi buffer sgls to port if available */
 888         if (!list_empty(&post_sblist)) {
 889                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 890                                                 phba->sli4_hba.scsi_xri_cnt);
 891                 /* failed to post any scsi buffer, return error */
 892                 if (num_posted == 0)
 893                         rc = -EIO;
 894         }
 895         return rc;
 896 }
 897
 898 /**
 899  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 900  * @vport: The virtual port for which this call being executed.
 901  * @num_to_allocate: The requested number of buffers to allocate.
 902  *
 903  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 904  * the scsi buffer contains all the necessary information needed to initiate
 905  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 906  * them on a list, it post them to the port by using SGL block post.
 907  *
 908  * Return codes:
 909  *   int - number of scsi buffers that were allocated and posted.
 910  *   0 = failure, less than num_to_alloc is a partial failure.
 911  **/
 912 static int
 913 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 914 {
 915         struct lpfc_hba *phba = vport->phba;
 916         struct lpfc_scsi_buf *psb;
 917         struct sli4_sge *sgl;
 918         IOCB_t *iocb;
 919         dma_addr_t pdma_phys_fcp_cmd;
 920         dma_addr_t pdma_phys_fcp_rsp;
 921         dma_addr_t pdma_phys_bpl;
 922         uint16_t iotag, lxri = 0;
 923         int bcnt, num_posted, sgl_size;
 924         LIST_HEAD(prep_sblist);
 925         LIST_HEAD(post_sblist);
 926         LIST_HEAD(scsi_sblist);
 927
 928         sgl_size = phba->cfg_sg_dma_buf_size -
 929                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 930
 931         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 932                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 933                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 934                          (int)sizeof(struct fcp_cmnd),
 935                          (int)sizeof(struct fcp_rsp));
 936
 937         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 938                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 939                 if (!psb)
 940                         break;
 941                 /*
 942                  * Get memory from the pci pool to map the virt space to
 943                  * pci bus space for an I/O. The DMA buffer includes space
 944                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 945                  * of bde's necessary to support the sg_tablesize.
 946                  */
 947                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 948                                                 GFP_KERNEL, &psb->dma_handle);
 949                 if (!psb->data) {
 950                         kfree(psb);
 951                         break;
 952                 }
 953                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 954
 955                 /*
 956                  * 4K Page alignment is CRITICAL to BlockGuard, double check
 957                  * to be sure.
 958                  */
 959                 if (phba->cfg_enable_bg  && (((unsigned long)(psb->data) &
 960                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
 961                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 962                                       psb->data, psb->dma_handle);
 963                         kfree(psb);
 964                         break;
 965                 }
 966
 967
 968                 lxri = lpfc_sli4_next_xritag(phba);
 969                 if (lxri == NO_XRI) {
 970                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 971                               psb->data, psb->dma_handle);
 972                         kfree(psb);
 973                         break;
 974                 }
 975
 976                 /* Allocate iotag for psb->cur_iocbq. */
 977                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 978                 if (iotag == 0) {
 979                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 980                                 psb->data, psb->dma_handle);
 981                         kfree(psb);
 982                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 983                                         "3368 Failed to allocated IOTAG for"
 984                                         " XRI:0x%x\n", lxri);
 985                         lpfc_sli4_free_xri(phba, lxri);
 986                         break;
 987                 }
 988                 psb->cur_iocbq.sli4_lxritag = lxri;
 989                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 990                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 991                 psb->fcp_bpl = psb->data;
 992                 psb->fcp_cmnd = (psb->data + sgl_size);
 993                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 994                                         sizeof(struct fcp_cmnd));
 995
 996                 /* Initialize local short-hand pointers. */
 997                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 998                 pdma_phys_bpl = psb->dma_handle;
 999                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
1000                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
1001
1002                 /*
1003                  * The first two bdes are the FCP_CMD and FCP_RSP.
1004                  * The balance are sg list bdes. Initialize the
1005                  * first two and leave the rest for queuecommand.
1006                  */
1007                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
1008                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
1009                 sgl->word2 = le32_to_cpu(sgl->word2);
1010                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1011                 sgl->word2 = cpu_to_le32(sgl->word2);
1012                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
1013                 sgl++;
1014
1015                 /* Setup the physical region for the FCP RSP */
1016                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
1017                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
1018                 sgl->word2 = le32_to_cpu(sgl->word2);
1019                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1020                 sgl->word2 = cpu_to_le32(sgl->word2);
1021                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
1022
1023                 /*
1024                  * Since the IOCB for the FCP I/O is built into this
1025                  * lpfc_scsi_buf, initialize it with all known data now.
1026                  */
1027                 iocb = &psb->cur_iocbq.iocb;
1028                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
1029                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
1030                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
1031                  * We are setting the bpl to point to out sgl. An sgl's
1032                  * entries are 16 bytes, a bpl entries are 12 bytes.
1033                  */
1034                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
1035                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
1036                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
1037                 iocb->ulpBdeCount = 1;
1038                 iocb->ulpLe = 1;
1039                 iocb->ulpClass = CLASS3;
1040                 psb->cur_iocbq.context1 = psb;
1041                 psb->dma_phys_bpl = pdma_phys_bpl;
1042
1043                 /* add the scsi buffer to a post list */
1044                 list_add_tail(&psb->list, &post_sblist);
1045                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
1046                 phba->sli4_hba.scsi_xri_cnt++;
1047                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
1048         }
1049         lpfc_printf_log(phba, KERN_INFO, LOG_BG,
1050                         "3021 Allocate %d out of %d requested new SCSI "
1051                         "buffers\n", bcnt, num_to_alloc);
1052
1053         /* post the list of scsi buffer sgls to port if available */
1054         if (!list_empty(&post_sblist))
1055                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
1056                                                           &post_sblist, bcnt);
1057         else
1058                 num_posted = 0;
1059
1060         return num_posted;
1061 }
1062
1063 /**
1064  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
1065  * @vport: The virtual port for which this call being executed.
1066  * @num_to_allocate: The requested number of buffers to allocate.
1067  *
1068  * This routine wraps the actual SCSI buffer allocator function pointer from
1069  * the lpfc_hba struct.
1070  *
1071  * Return codes:
1072  *   int - number of scsi buffers that were allocated.
1073  *   0 = failure, less than num_to_alloc is a partial failure.
1074  **/
1075 static inline int
1076 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
1077 {
1078         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
1079 }
1080
1081 /**
1082  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1083  * @phba: The HBA for which this call is being executed.
1084  *
1085  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1086  * and returns to caller.
1087  *
1088  * Return codes:
1089  *   NULL - Error
1090  *   Pointer to lpfc_scsi_buf - Success
1091  **/
1092 static struct lpfc_scsi_buf*
1093 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1094 {
1095         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
1096         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
1097         unsigned long iflag = 0;
1098
1099         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1100         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
1101                          list);
1102         if (!lpfc_cmd) {
1103                 spin_lock(&phba->scsi_buf_list_put_lock);
1104                 list_splice(&phba->lpfc_scsi_buf_list_put,
1105                             &phba->lpfc_scsi_buf_list_get);
1106                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1107                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
1108                                  struct lpfc_scsi_buf, list);
1109                 spin_unlock(&phba->scsi_buf_list_put_lock);
1110         }
1111         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1112         return  lpfc_cmd;
1113 }
1114 /**
1115  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1116  * @phba: The HBA for which this call is being executed.
1117  *
1118  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1119  * and returns to caller.
1120  *
1121  * Return codes:
1122  *   NULL - Error
1123  *   Pointer to lpfc_scsi_buf - Success
1124  **/
1125 static struct lpfc_scsi_buf*
1126 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1127 {
1128         struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1129         unsigned long iflag = 0;
1130         int found = 0;
1131
1132         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1133         list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1134                                  &phba->lpfc_scsi_buf_list_get, list) {
1135                 if (lpfc_test_rrq_active(phba, ndlp,
1136                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1137                         continue;
1138                 list_del(&lpfc_cmd->list);
1139                 found = 1;
1140                 break;
1141         }
1142         if (!found) {
1143                 spin_lock(&phba->scsi_buf_list_put_lock);
1144                 list_splice(&phba->lpfc_scsi_buf_list_put,
1145                             &phba->lpfc_scsi_buf_list_get);
1146                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1147                 spin_unlock(&phba->scsi_buf_list_put_lock);
1148                 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1149                                          &phba->lpfc_scsi_buf_list_get, list) {
1150                         if (lpfc_test_rrq_active(
1151                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1152                                 continue;
1153                         list_del(&lpfc_cmd->list);
1154                         found = 1;
1155                         break;
1156                 }
1157         }
1158         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1159         if (!found)
1160                 return NULL;
1161         return  lpfc_cmd;
1162 }
1163 /**
1164  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1165  * @phba: The HBA for which this call is being executed.
1166  *
1167  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1168  * and returns to caller.
1169  *
1170  * Return codes:
1171  *   NULL - Error
1172  *   Pointer to lpfc_scsi_buf - Success
1173  **/
1174 static struct lpfc_scsi_buf*
1175 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1176 {
1177         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1178 }
1179
1180 /**
1181  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1182  * @phba: The Hba for which this call is being executed.
1183  * @psb: The scsi buffer which is being released.
1184  *
1185  * This routine releases @psb scsi buffer by adding it to tail of @phba
1186  * lpfc_scsi_buf_list list.
1187  **/
1188 static void
1189 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1190 {
1191         unsigned long iflag = 0;
1192
1193         psb->seg_cnt = 0;
1194         psb->nonsg_phys = 0;
1195         psb->prot_seg_cnt = 0;
1196
1197         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1198         psb->pCmd = NULL;
1199         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1200         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1201         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1202 }
1203
1204 /**
1205  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1206  * @phba: The Hba for which this call is being executed.
1207  * @psb: The scsi buffer which is being released.
1208  *
1209  * This routine releases @psb scsi buffer by adding it to tail of @phba
1210  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1211  * and cannot be reused for at least RA_TOV amount of time if it was
1212  * aborted.
1213  **/
1214 static void
1215 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1216 {
1217         unsigned long iflag = 0;
1218
1219         psb->seg_cnt = 0;
1220         psb->nonsg_phys = 0;
1221         psb->prot_seg_cnt = 0;
1222
1223         if (psb->exch_busy) {
1224                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1225                                         iflag);
1226                 psb->pCmd = NULL;
1227                 list_add_tail(&psb->list,
1228                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1229                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1230                                         iflag);
1231         } else {
1232                 psb->pCmd = NULL;
1233                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1234                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1235                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1236                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1237         }
1238 }
1239
1240 /**
1241  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1242  * @phba: The Hba for which this call is being executed.
1243  * @psb: The scsi buffer which is being released.
1244  *
1245  * This routine releases @psb scsi buffer by adding it to tail of @phba
1246  * lpfc_scsi_buf_list list.
1247  **/
1248 static void
1249 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1250 {
1251
1252         phba->lpfc_release_scsi_buf(phba, psb);
1253 }
1254
1255 /**
1256  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1257  * @phba: The Hba for which this call is being executed.
1258  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1259  *
1260  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1261  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1262  * through sg elements and format the bdea. This routine also initializes all
1263  * IOCB fields which are dependent on scsi command request buffer.
1264  *
1265  * Return codes:
1266  *   1 - Error
1267  *   0 - Success
1268  **/
1269 static int
1270 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1271 {
1272         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1273         struct scatterlist *sgel = NULL;
1274         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1275         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1276         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1277         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1278         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1279         dma_addr_t physaddr;
1280         uint32_t num_bde = 0;
1281         int nseg, datadir = scsi_cmnd->sc_data_direction;
1282
1283         /*
1284          * There are three possibilities here - use scatter-gather segment, use
1285          * the single mapping, or neither.  Start the lpfc command prep by
1286          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1287          * data bde entry.
1288          */
1289         bpl += 2;
1290         if (scsi_sg_count(scsi_cmnd)) {
1291                 /*
1292                  * The driver stores the segment count returned from pci_map_sg
1293                  * because this a count of dma-mappings used to map the use_sg
1294                  * pages.  They are not guaranteed to be the same for those
1295                  * architectures that implement an IOMMU.
1296                  */
1297
1298                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1299                                   scsi_sg_count(scsi_cmnd), datadir);
1300                 if (unlikely(!nseg))
1301                         return 1;
1302
1303                 lpfc_cmd->seg_cnt = nseg;
1304                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1305                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1306                                 "9064 BLKGRD: %s: Too many sg segments from "
1307                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1308                                __func__, phba->cfg_sg_seg_cnt,
1309                                lpfc_cmd->seg_cnt);
1310                         lpfc_cmd->seg_cnt = 0;
1311                         scsi_dma_unmap(scsi_cmnd);
1312                         return 1;
1313                 }
1314
1315                 /*
1316                  * The driver established a maximum scatter-gather segment count
1317                  * during probe that limits the number of sg elements in any
1318                  * single scsi command.  Just run through the seg_cnt and format
1319                  * the bde's.
1320                  * When using SLI-3 the driver will try to fit all the BDEs into
1321                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1322                  * does for SLI-2 mode.
1323                  */
1324                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1325                         physaddr = sg_dma_address(sgel);
1326                         if (phba->sli_rev == 3 &&
1327                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1328                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1329                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1330                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1331                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1332                                 data_bde->addrLow = putPaddrLow(physaddr);
1333                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1334                                 data_bde++;
1335                         } else {
1336                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1337                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1338                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1339                                 bpl->addrLow =
1340                                         le32_to_cpu(putPaddrLow(physaddr));
1341                                 bpl->addrHigh =
1342                                         le32_to_cpu(putPaddrHigh(physaddr));
1343                                 bpl++;
1344                         }
1345                 }
1346         }
1347
1348         /*
1349          * Finish initializing those IOCB fields that are dependent on the
1350          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1351          * explicitly reinitialized and for SLI-3 the extended bde count is
1352          * explicitly reinitialized since all iocb memory resources are reused.
1353          */
1354         if (phba->sli_rev == 3 &&
1355             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1356             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1357                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1358                         /*
1359                          * The extended IOCB format can only fit 3 BDE or a BPL.
1360                          * This I/O has more than 3 BDE so the 1st data bde will
1361                          * be a BPL that is filled in here.
1362                          */
1363                         physaddr = lpfc_cmd->dma_handle;
1364                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1365                         data_bde->tus.f.bdeSize = (num_bde *
1366                                                    sizeof(struct ulp_bde64));
1367                         physaddr += (sizeof(struct fcp_cmnd) +
1368                                      sizeof(struct fcp_rsp) +
1369                                      (2 * sizeof(struct ulp_bde64)));
1370                         data_bde->addrHigh = putPaddrHigh(physaddr);
1371                         data_bde->addrLow = putPaddrLow(physaddr);
1372                         /* ebde count includes the response bde and data bpl */
1373                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1374                 } else {
1375                         /* ebde count includes the response bde and data bdes */
1376                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1377                 }
1378         } else {
1379                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1380                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1381                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1382         }
1383         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1384
1385         /*
1386          * Due to difference in data length between DIF/non-DIF paths,
1387          * we need to set word 4 of IOCB here
1388          */
1389         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1390         return 0;
1391 }
1392
1393 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1394
1395 /* Return if if error injection is detected by Initiator */
1396 #define BG_ERR_INIT     0x1
1397 /* Return if if error injection is detected by Target */
1398 #define BG_ERR_TGT      0x2
1399 /* Return if if swapping CSUM<-->CRC is required for error injection */
1400 #define BG_ERR_SWAP     0x10
1401 /* Return if disabling Guard/Ref/App checking is required for error injection */
1402 #define BG_ERR_CHECK    0x20
1403
1404 /**
1405  * lpfc_bg_err_inject - Determine if we should inject an error
1406  * @phba: The Hba for which this call is being executed.
1407  * @sc: The SCSI command to examine
1408  * @reftag: (out) BlockGuard reference tag for transmitted data
1409  * @apptag: (out) BlockGuard application tag for transmitted data
1410  * @new_guard (in) Value to replace CRC with if needed
1411  *
1412  * Returns BG_ERR_* bit mask or 0 if request ignored
1413  **/
1414 static int
1415 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1416                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1417 {
1418         struct scatterlist *sgpe; /* s/g prot entry */
1419         struct scatterlist *sgde; /* s/g data entry */
1420         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1421         struct scsi_dif_tuple *src = NULL;
1422         struct lpfc_nodelist *ndlp;
1423         struct lpfc_rport_data *rdata;
1424         uint32_t op = scsi_get_prot_op(sc);
1425         uint32_t blksize;
1426         uint32_t numblks;
1427         sector_t lba;
1428         int rc = 0;
1429         int blockoff = 0;
1430
1431         if (op == SCSI_PROT_NORMAL)
1432                 return 0;
1433
1434         sgpe = scsi_prot_sglist(sc);
1435         sgde = scsi_sglist(sc);
1436         lba = scsi_get_lba(sc);
1437
1438         /* First check if we need to match the LBA */
1439         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1440                 blksize = lpfc_cmd_blksize(sc);
1441                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1442
1443                 /* Make sure we have the right LBA if one is specified */
1444                 if ((phba->lpfc_injerr_lba < lba) ||
1445                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1446                         return 0;
1447                 if (sgpe) {
1448                         blockoff = phba->lpfc_injerr_lba - lba;
1449                         numblks = sg_dma_len(sgpe) /
1450                                 sizeof(struct scsi_dif_tuple);
1451                         if (numblks < blockoff)
1452                                 blockoff = numblks;
1453                 }
1454         }
1455
1456         /* Next check if we need to match the remote NPortID or WWPN */
1457         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1458         if (rdata && rdata->pnode) {
1459                 ndlp = rdata->pnode;
1460
1461                 /* Make sure we have the right NPortID if one is specified */
1462                 if (phba->lpfc_injerr_nportid  &&
1463                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1464                         return 0;
1465
1466                 /*
1467                  * Make sure we have the right WWPN if one is specified.
1468                  * wwn[0] should be a non-zero NAA in a good WWPN.
1469                  */
1470                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1471                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1472                                 sizeof(struct lpfc_name)) != 0))
1473                         return 0;
1474         }
1475
1476         /* Setup a ptr to the protection data if the SCSI host provides it */
1477         if (sgpe) {
1478                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1479                 src += blockoff;
1480                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1481         }
1482
1483         /* Should we change the Reference Tag */
1484         if (reftag) {
1485                 if (phba->lpfc_injerr_wref_cnt) {
1486                         switch (op) {
1487                         case SCSI_PROT_WRITE_PASS:
1488                                 if (src) {
1489                                         /*
1490                                          * For WRITE_PASS, force the error
1491                                          * to be sent on the wire. It should
1492                                          * be detected by the Target.
1493                                          * If blockoff != 0 error will be
1494                                          * inserted in middle of the IO.
1495                                          */
1496
1497                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1498                                         "9076 BLKGRD: Injecting reftag error: "
1499                                         "write lba x%lx + x%x oldrefTag x%x\n",
1500                                         (unsigned long)lba, blockoff,
1501                                         be32_to_cpu(src->ref_tag));
1502
1503                                         /*
1504                                          * Save the old ref_tag so we can
1505                                          * restore it on completion.
1506                                          */
1507                                         if (lpfc_cmd) {
1508                                                 lpfc_cmd->prot_data_type =
1509                                                         LPFC_INJERR_REFTAG;
1510                                                 lpfc_cmd->prot_data_segment =
1511                                                         src;
1512                                                 lpfc_cmd->prot_data =
1513                                                         src->ref_tag;
1514                                         }
1515                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1516                                         phba->lpfc_injerr_wref_cnt--;
1517                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1518                                                 phba->lpfc_injerr_nportid = 0;
1519                                                 phba->lpfc_injerr_lba =
1520                                                         LPFC_INJERR_LBA_OFF;
1521                                                 memset(&phba->lpfc_injerr_wwpn,
1522                                                   0, sizeof(struct lpfc_name));
1523                                         }
1524                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1525
1526                                         break;
1527                                 }
1528                                 /* Drop thru */
1529                         case SCSI_PROT_WRITE_INSERT:
1530                                 /*
1531                                  * For WRITE_INSERT, force the error
1532                                  * to be sent on the wire. It should be
1533                                  * detected by the Target.
1534                                  */
1535                                 /* DEADBEEF will be the reftag on the wire */
1536                                 *reftag = 0xDEADBEEF;
1537                                 phba->lpfc_injerr_wref_cnt--;
1538                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1539                                         phba->lpfc_injerr_nportid = 0;
1540                                         phba->lpfc_injerr_lba =
1541                                         LPFC_INJERR_LBA_OFF;
1542                                         memset(&phba->lpfc_injerr_wwpn,
1543                                                 0, sizeof(struct lpfc_name));
1544                                 }
1545                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1546
1547                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1548                                         "9078 BLKGRD: Injecting reftag error: "
1549                                         "write lba x%lx\n", (unsigned long)lba);
1550                                 break;
1551                         case SCSI_PROT_WRITE_STRIP:
1552                                 /*
1553                                  * For WRITE_STRIP and WRITE_PASS,
1554                                  * force the error on data
1555                                  * being copied from SLI-Host to SLI-Port.
1556                                  */
1557                                 *reftag = 0xDEADBEEF;
1558                                 phba->lpfc_injerr_wref_cnt--;
1559                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1560                                         phba->lpfc_injerr_nportid = 0;
1561                                         phba->lpfc_injerr_lba =
1562                                                 LPFC_INJERR_LBA_OFF;
1563                                         memset(&phba->lpfc_injerr_wwpn,
1564                                                 0, sizeof(struct lpfc_name));
1565                                 }
1566                                 rc = BG_ERR_INIT;
1567
1568                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1569                                         "9077 BLKGRD: Injecting reftag error: "
1570                                         "write lba x%lx\n", (unsigned long)lba);
1571                                 break;
1572                         }
1573                 }
1574                 if (phba->lpfc_injerr_rref_cnt) {
1575                         switch (op) {
1576                         case SCSI_PROT_READ_INSERT:
1577                         case SCSI_PROT_READ_STRIP:
1578                         case SCSI_PROT_READ_PASS:
1579                                 /*
1580                                  * For READ_STRIP and READ_PASS, force the
1581                                  * error on data being read off the wire. It
1582                                  * should force an IO error to the driver.
1583                                  */
1584                                 *reftag = 0xDEADBEEF;
1585                                 phba->lpfc_injerr_rref_cnt--;
1586                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1587                                         phba->lpfc_injerr_nportid = 0;
1588                                         phba->lpfc_injerr_lba =
1589                                                 LPFC_INJERR_LBA_OFF;
1590                                         memset(&phba->lpfc_injerr_wwpn,
1591                                                 0, sizeof(struct lpfc_name));
1592                                 }
1593                                 rc = BG_ERR_INIT;
1594
1595                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1596                                         "9079 BLKGRD: Injecting reftag error: "
1597                                         "read lba x%lx\n", (unsigned long)lba);
1598                                 break;
1599                         }
1600                 }
1601         }
1602
1603         /* Should we change the Application Tag */
1604         if (apptag) {
1605                 if (phba->lpfc_injerr_wapp_cnt) {
1606                         switch (op) {
1607                         case SCSI_PROT_WRITE_PASS:
1608                                 if (src) {
1609                                         /*
1610                                          * For WRITE_PASS, force the error
1611                                          * to be sent on the wire. It should
1612                                          * be detected by the Target.
1613                                          * If blockoff != 0 error will be
1614                                          * inserted in middle of the IO.
1615                                          */
1616
1617                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1618                                         "9080 BLKGRD: Injecting apptag error: "
1619                                         "write lba x%lx + x%x oldappTag x%x\n",
1620                                         (unsigned long)lba, blockoff,
1621                                         be16_to_cpu(src->app_tag));
1622
1623                                         /*
1624                                          * Save the old app_tag so we can
1625                                          * restore it on completion.
1626                                          */
1627                                         if (lpfc_cmd) {
1628                                                 lpfc_cmd->prot_data_type =
1629                                                         LPFC_INJERR_APPTAG;
1630                                                 lpfc_cmd->prot_data_segment =
1631                                                         src;
1632                                                 lpfc_cmd->prot_data =
1633                                                         src->app_tag;
1634                                         }
1635                                         src->app_tag = cpu_to_be16(0xDEAD);
1636                                         phba->lpfc_injerr_wapp_cnt--;
1637                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1638                                                 phba->lpfc_injerr_nportid = 0;
1639                                                 phba->lpfc_injerr_lba =
1640                                                         LPFC_INJERR_LBA_OFF;
1641                                                 memset(&phba->lpfc_injerr_wwpn,
1642                                                   0, sizeof(struct lpfc_name));
1643                                         }
1644                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1645                                         break;
1646                                 }
1647                                 /* Drop thru */
1648                         case SCSI_PROT_WRITE_INSERT:
1649                                 /*
1650                                  * For WRITE_INSERT, force the
1651                                  * error to be sent on the wire. It should be
1652                                  * detected by the Target.
1653                                  */
1654                                 /* DEAD will be the apptag on the wire */
1655                                 *apptag = 0xDEAD;
1656                                 phba->lpfc_injerr_wapp_cnt--;
1657                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1658                                         phba->lpfc_injerr_nportid = 0;
1659                                         phba->lpfc_injerr_lba =
1660                                                 LPFC_INJERR_LBA_OFF;
1661                                         memset(&phba->lpfc_injerr_wwpn,
1662                                                 0, sizeof(struct lpfc_name));
1663                                 }
1664                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1665
1666                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1667                                         "0813 BLKGRD: Injecting apptag error: "
1668                                         "write lba x%lx\n", (unsigned long)lba);
1669                                 break;
1670                         case SCSI_PROT_WRITE_STRIP:
1671                                 /*
1672                                  * For WRITE_STRIP and WRITE_PASS,
1673                                  * force the error on data
1674                                  * being copied from SLI-Host to SLI-Port.
1675                                  */
1676                                 *apptag = 0xDEAD;
1677                                 phba->lpfc_injerr_wapp_cnt--;
1678                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1679                                         phba->lpfc_injerr_nportid = 0;
1680                                         phba->lpfc_injerr_lba =
1681                                                 LPFC_INJERR_LBA_OFF;
1682                                         memset(&phba->lpfc_injerr_wwpn,
1683                                                 0, sizeof(struct lpfc_name));
1684                                 }
1685                                 rc = BG_ERR_INIT;
1686
1687                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1688                                         "0812 BLKGRD: Injecting apptag error: "
1689                                         "write lba x%lx\n", (unsigned long)lba);
1690                                 break;
1691                         }
1692                 }
1693                 if (phba->lpfc_injerr_rapp_cnt) {
1694                         switch (op) {
1695                         case SCSI_PROT_READ_INSERT:
1696                         case SCSI_PROT_READ_STRIP:
1697                         case SCSI_PROT_READ_PASS:
1698                                 /*
1699                                  * For READ_STRIP and READ_PASS, force the
1700                                  * error on data being read off the wire. It
1701                                  * should force an IO error to the driver.
1702                                  */
1703                                 *apptag = 0xDEAD;
1704                                 phba->lpfc_injerr_rapp_cnt--;
1705                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1706                                         phba->lpfc_injerr_nportid = 0;
1707                                         phba->lpfc_injerr_lba =
1708                                                 LPFC_INJERR_LBA_OFF;
1709                                         memset(&phba->lpfc_injerr_wwpn,
1710                                                 0, sizeof(struct lpfc_name));
1711                                 }
1712                                 rc = BG_ERR_INIT;
1713
1714                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1715                                         "0814 BLKGRD: Injecting apptag error: "
1716                                         "read lba x%lx\n", (unsigned long)lba);
1717                                 break;
1718                         }
1719                 }
1720         }
1721
1722
1723         /* Should we change the Guard Tag */
1724         if (new_guard) {
1725                 if (phba->lpfc_injerr_wgrd_cnt) {
1726                         switch (op) {
1727                         case SCSI_PROT_WRITE_PASS:
1728                                 rc = BG_ERR_CHECK;
1729                                 /* Drop thru */
1730
1731                         case SCSI_PROT_WRITE_INSERT:
1732                                 /*
1733                                  * For WRITE_INSERT, force the
1734                                  * error to be sent on the wire. It should be
1735                                  * detected by the Target.
1736                                  */
1737                                 phba->lpfc_injerr_wgrd_cnt--;
1738                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1739                                         phba->lpfc_injerr_nportid = 0;
1740                                         phba->lpfc_injerr_lba =
1741                                                 LPFC_INJERR_LBA_OFF;
1742                                         memset(&phba->lpfc_injerr_wwpn,
1743                                                 0, sizeof(struct lpfc_name));
1744                                 }
1745
1746                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1747                                 /* Signals the caller to swap CRC->CSUM */
1748
1749                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1750                                         "0817 BLKGRD: Injecting guard error: "
1751                                         "write lba x%lx\n", (unsigned long)lba);
1752                                 break;
1753                         case SCSI_PROT_WRITE_STRIP:
1754                                 /*
1755                                  * For WRITE_STRIP and WRITE_PASS,
1756                                  * force the error on data
1757                                  * being copied from SLI-Host to SLI-Port.
1758                                  */
1759                                 phba->lpfc_injerr_wgrd_cnt--;
1760                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1761                                         phba->lpfc_injerr_nportid = 0;
1762                                         phba->lpfc_injerr_lba =
1763                                                 LPFC_INJERR_LBA_OFF;
1764                                         memset(&phba->lpfc_injerr_wwpn,
1765                                                 0, sizeof(struct lpfc_name));
1766                                 }
1767
1768                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1769                                 /* Signals the caller to swap CRC->CSUM */
1770
1771                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1772                                         "0816 BLKGRD: Injecting guard error: "
1773                                         "write lba x%lx\n", (unsigned long)lba);
1774                                 break;
1775                         }
1776                 }
1777                 if (phba->lpfc_injerr_rgrd_cnt) {
1778                         switch (op) {
1779                         case SCSI_PROT_READ_INSERT:
1780                         case SCSI_PROT_READ_STRIP:
1781                         case SCSI_PROT_READ_PASS:
1782                                 /*
1783                                  * For READ_STRIP and READ_PASS, force the
1784                                  * error on data being read off the wire. It
1785                                  * should force an IO error to the driver.
1786                                  */
1787                                 phba->lpfc_injerr_rgrd_cnt--;
1788                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1789                                         phba->lpfc_injerr_nportid = 0;
1790                                         phba->lpfc_injerr_lba =
1791                                                 LPFC_INJERR_LBA_OFF;
1792                                         memset(&phba->lpfc_injerr_wwpn,
1793                                                 0, sizeof(struct lpfc_name));
1794                                 }
1795
1796                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1797                                 /* Signals the caller to swap CRC->CSUM */
1798
1799                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1800                                         "0818 BLKGRD: Injecting guard error: "
1801                                         "read lba x%lx\n", (unsigned long)lba);
1802                         }
1803                 }
1804         }
1805
1806         return rc;
1807 }
1808 #endif
1809
1810 /**
1811  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1812  * the specified SCSI command.
1813  * @phba: The Hba for which this call is being executed.
1814  * @sc: The SCSI command to examine
1815  * @txopt: (out) BlockGuard operation for transmitted data
1816  * @rxopt: (out) BlockGuard operation for received data
1817  *
1818  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1819  *
1820  **/
1821 static int
1822 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1823                 uint8_t *txop, uint8_t *rxop)
1824 {
1825         uint8_t ret = 0;
1826
1827         if (lpfc_cmd_guard_csum(sc)) {
1828                 switch (scsi_get_prot_op(sc)) {
1829                 case SCSI_PROT_READ_INSERT:
1830                 case SCSI_PROT_WRITE_STRIP:
1831                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1832                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1833                         break;
1834
1835                 case SCSI_PROT_READ_STRIP:
1836                 case SCSI_PROT_WRITE_INSERT:
1837                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1838                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1839                         break;
1840
1841                 case SCSI_PROT_READ_PASS:
1842                 case SCSI_PROT_WRITE_PASS:
1843                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1844                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1845                         break;
1846
1847                 case SCSI_PROT_NORMAL:
1848                 default:
1849                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1850                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1851                                         scsi_get_prot_op(sc));
1852                         ret = 1;
1853                         break;
1854
1855                 }
1856         } else {
1857                 switch (scsi_get_prot_op(sc)) {
1858                 case SCSI_PROT_READ_STRIP:
1859                 case SCSI_PROT_WRITE_INSERT:
1860                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1861                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1862                         break;
1863
1864                 case SCSI_PROT_READ_PASS:
1865                 case SCSI_PROT_WRITE_PASS:
1866                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1867                         *txop = BG_OP_IN_CRC_OUT_CRC;
1868                         break;
1869
1870                 case SCSI_PROT_READ_INSERT:
1871                 case SCSI_PROT_WRITE_STRIP:
1872                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1873                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1874                         break;
1875
1876                 case SCSI_PROT_NORMAL:
1877                 default:
1878                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1879                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1880                                         scsi_get_prot_op(sc));
1881                         ret = 1;
1882                         break;
1883                 }
1884         }
1885
1886         return ret;
1887 }
1888
1889 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1890 /**
1891  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1892  * the specified SCSI command in order to force a guard tag error.
1893  * @phba: The Hba for which this call is being executed.
1894  * @sc: The SCSI command to examine
1895  * @txopt: (out) BlockGuard operation for transmitted data
1896  * @rxopt: (out) BlockGuard operation for received data
1897  *
1898  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1899  *
1900  **/
1901 static int
1902 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1903                 uint8_t *txop, uint8_t *rxop)
1904 {
1905         uint8_t ret = 0;
1906
1907         if (lpfc_cmd_guard_csum(sc)) {
1908                 switch (scsi_get_prot_op(sc)) {
1909                 case SCSI_PROT_READ_INSERT:
1910                 case SCSI_PROT_WRITE_STRIP:
1911                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1912                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1913                         break;
1914
1915                 case SCSI_PROT_READ_STRIP:
1916                 case SCSI_PROT_WRITE_INSERT:
1917                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1918                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1919                         break;
1920
1921                 case SCSI_PROT_READ_PASS:
1922                 case SCSI_PROT_WRITE_PASS:
1923                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1924                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1925                         break;
1926
1927                 case SCSI_PROT_NORMAL:
1928                 default:
1929                         break;
1930
1931                 }
1932         } else {
1933                 switch (scsi_get_prot_op(sc)) {
1934                 case SCSI_PROT_READ_STRIP:
1935                 case SCSI_PROT_WRITE_INSERT:
1936                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1937                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1938                         break;
1939
1940                 case SCSI_PROT_READ_PASS:
1941                 case SCSI_PROT_WRITE_PASS:
1942                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1943                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1944                         break;
1945
1946                 case SCSI_PROT_READ_INSERT:
1947                 case SCSI_PROT_WRITE_STRIP:
1948                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1949                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1950                         break;
1951
1952                 case SCSI_PROT_NORMAL:
1953                 default:
1954                         break;
1955                 }
1956         }
1957
1958         return ret;
1959 }
1960 #endif
1961
1962 /**
1963  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1964  * @phba: The Hba for which this call is being executed.
1965  * @sc: pointer to scsi command we're working on
1966  * @bpl: pointer to buffer list for protection groups
1967  * @datacnt: number of segments of data that have been dma mapped
1968  *
1969  * This function sets up BPL buffer list for protection groups of
1970  * type LPFC_PG_TYPE_NO_DIF
1971  *
1972  * This is usually used when the HBA is instructed to generate
1973  * DIFs and insert them into data stream (or strip DIF from
1974  * incoming data stream)
1975  *
1976  * The buffer list consists of just one protection group described
1977  * below:
1978  *                                +-------------------------+
1979  *   start of prot group  -->     |          PDE_5          |
1980  *                                +-------------------------+
1981  *                                |          PDE_6          |
1982  *                                +-------------------------+
1983  *                                |         Data BDE        |
1984  *                                +-------------------------+
1985  *                                |more Data BDE's ... (opt)|
1986  *                                +-------------------------+
1987  *
1988  *
1989  * Note: Data s/g buffers have been dma mapped
1990  *
1991  * Returns the number of BDEs added to the BPL.
1992  **/
1993 static int
1994 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1995                 struct ulp_bde64 *bpl, int datasegcnt)
1996 {
1997         struct scatterlist *sgde = NULL; /* s/g data entry */
1998         struct lpfc_pde5 *pde5 = NULL;
1999         struct lpfc_pde6 *pde6 = NULL;
2000         dma_addr_t physaddr;
2001         int i = 0, num_bde = 0, status;
2002         int datadir = sc->sc_data_direction;
2003 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2004         uint32_t rc;
2005 #endif
2006         uint32_t checking = 1;
2007         uint32_t reftag;
2008         unsigned blksize;
2009         uint8_t txop, rxop;
2010
2011         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2012         if (status)
2013                 goto out;
2014
2015         /* extract some info from the scsi command for pde*/
2016         blksize = lpfc_cmd_blksize(sc);
2017         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2018
2019 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2020         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2021         if (rc) {
2022                 if (rc & BG_ERR_SWAP)
2023                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2024                 if (rc & BG_ERR_CHECK)
2025                         checking = 0;
2026         }
2027 #endif
2028
2029         /* setup PDE5 with what we have */
2030         pde5 = (struct lpfc_pde5 *) bpl;
2031         memset(pde5, 0, sizeof(struct lpfc_pde5));
2032         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2033
2034         /* Endianness conversion if necessary for PDE5 */
2035         pde5->word0 = cpu_to_le32(pde5->word0);
2036         pde5->reftag = cpu_to_le32(reftag);
2037
2038         /* advance bpl and increment bde count */
2039         num_bde++;
2040         bpl++;
2041         pde6 = (struct lpfc_pde6 *) bpl;
2042
2043         /* setup PDE6 with the rest of the info */
2044         memset(pde6, 0, sizeof(struct lpfc_pde6));
2045         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2046         bf_set(pde6_optx, pde6, txop);
2047         bf_set(pde6_oprx, pde6, rxop);
2048
2049         /*
2050          * We only need to check the data on READs, for WRITEs
2051          * protection data is automatically generated, not checked.
2052          */
2053         if (datadir == DMA_FROM_DEVICE) {
2054                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2055                         bf_set(pde6_ce, pde6, checking);
2056                 else
2057                         bf_set(pde6_ce, pde6, 0);
2058
2059                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2060                         bf_set(pde6_re, pde6, checking);
2061                 else
2062                         bf_set(pde6_re, pde6, 0);
2063         }
2064         bf_set(pde6_ai, pde6, 1);
2065         bf_set(pde6_ae, pde6, 0);
2066         bf_set(pde6_apptagval, pde6, 0);
2067
2068         /* Endianness conversion if necessary for PDE6 */
2069         pde6->word0 = cpu_to_le32(pde6->word0);
2070         pde6->word1 = cpu_to_le32(pde6->word1);
2071         pde6->word2 = cpu_to_le32(pde6->word2);
2072
2073         /* advance bpl and increment bde count */
2074         num_bde++;
2075         bpl++;
2076
2077         /* assumption: caller has already run dma_map_sg on command data */
2078         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2079                 physaddr = sg_dma_address(sgde);
2080                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
2081                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
2082                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
2083                 if (datadir == DMA_TO_DEVICE)
2084                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2085                 else
2086                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2087                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
2088                 bpl++;
2089                 num_bde++;
2090         }
2091
2092 out:
2093         return num_bde;
2094 }
2095
2096 /**
2097  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
2098  * @phba: The Hba for which this call is being executed.
2099  * @sc: pointer to scsi command we're working on
2100  * @bpl: pointer to buffer list for protection groups
2101  * @datacnt: number of segments of data that have been dma mapped
2102  * @protcnt: number of segment of protection data that have been dma mapped
2103  *
2104  * This function sets up BPL buffer list for protection groups of
2105  * type LPFC_PG_TYPE_DIF
2106  *
2107  * This is usually used when DIFs are in their own buffers,
2108  * separate from the data. The HBA can then by instructed
2109  * to place the DIFs in the outgoing stream.  For read operations,
2110  * The HBA could extract the DIFs and place it in DIF buffers.
2111  *
2112  * The buffer list for this type consists of one or more of the
2113  * protection groups described below:
2114  *                                    +-------------------------+
2115  *   start of first prot group  -->   |          PDE_5          |
2116  *                                    +-------------------------+
2117  *                                    |          PDE_6          |
2118  *                                    +-------------------------+
2119  *                                    |      PDE_7 (Prot BDE)   |
2120  *                                    +-------------------------+
2121  *                                    |        Data BDE         |
2122  *                                    +-------------------------+
2123  *                                    |more Data BDE's ... (opt)|
2124  *                                    +-------------------------+
2125  *   start of new  prot group  -->    |          PDE_5          |
2126  *                                    +-------------------------+
2127  *                                    |          ...            |
2128  *                                    +-------------------------+
2129  *
2130  * Note: It is assumed that both data and protection s/g buffers have been
2131  *       mapped for DMA
2132  *
2133  * Returns the number of BDEs added to the BPL.
2134  **/
2135 static int
2136 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2137                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2138 {
2139         struct scatterlist *sgde = NULL; /* s/g data entry */
2140         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2141         struct lpfc_pde5 *pde5 = NULL;
2142         struct lpfc_pde6 *pde6 = NULL;
2143         struct lpfc_pde7 *pde7 = NULL;
2144         dma_addr_t dataphysaddr, protphysaddr;
2145         unsigned short curr_data = 0, curr_prot = 0;
2146         unsigned int split_offset;
2147         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2148         unsigned int protgrp_blks, protgrp_bytes;
2149         unsigned int remainder, subtotal;
2150         int status;
2151         int datadir = sc->sc_data_direction;
2152         unsigned char pgdone = 0, alldone = 0;
2153         unsigned blksize;
2154 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2155         uint32_t rc;
2156 #endif
2157         uint32_t checking = 1;
2158         uint32_t reftag;
2159         uint8_t txop, rxop;
2160         int num_bde = 0;
2161
2162         sgpe = scsi_prot_sglist(sc);
2163         sgde = scsi_sglist(sc);
2164
2165         if (!sgpe || !sgde) {
2166                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2167                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2168                                 sgpe, sgde);
2169                 return 0;
2170         }
2171
2172         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2173         if (status)
2174                 goto out;
2175
2176         /* extract some info from the scsi command */
2177         blksize = lpfc_cmd_blksize(sc);
2178         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2179
2180 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2181         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2182         if (rc) {
2183                 if (rc & BG_ERR_SWAP)
2184                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2185                 if (rc & BG_ERR_CHECK)
2186                         checking = 0;
2187         }
2188 #endif
2189
2190         split_offset = 0;
2191         do {
2192                 /* Check to see if we ran out of space */
2193                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2194                         return num_bde + 3;
2195
2196                 /* setup PDE5 with what we have */
2197                 pde5 = (struct lpfc_pde5 *) bpl;
2198                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2199                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2200
2201                 /* Endianness conversion if necessary for PDE5 */
2202                 pde5->word0 = cpu_to_le32(pde5->word0);
2203                 pde5->reftag = cpu_to_le32(reftag);
2204
2205                 /* advance bpl and increment bde count */
2206                 num_bde++;
2207                 bpl++;
2208                 pde6 = (struct lpfc_pde6 *) bpl;
2209
2210                 /* setup PDE6 with the rest of the info */
2211                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2212                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2213                 bf_set(pde6_optx, pde6, txop);
2214                 bf_set(pde6_oprx, pde6, rxop);
2215
2216                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2217                         bf_set(pde6_ce, pde6, checking);
2218                 else
2219                         bf_set(pde6_ce, pde6, 0);
2220
2221                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2222                         bf_set(pde6_re, pde6, checking);
2223                 else
2224                         bf_set(pde6_re, pde6, 0);
2225
2226                 bf_set(pde6_ai, pde6, 1);
2227                 bf_set(pde6_ae, pde6, 0);
2228                 bf_set(pde6_apptagval, pde6, 0);
2229
2230                 /* Endianness conversion if necessary for PDE6 */
2231                 pde6->word0 = cpu_to_le32(pde6->word0);
2232                 pde6->word1 = cpu_to_le32(pde6->word1);
2233                 pde6->word2 = cpu_to_le32(pde6->word2);
2234
2235                 /* advance bpl and increment bde count */
2236                 num_bde++;
2237                 bpl++;
2238
2239                 /* setup the first BDE that points to protection buffer */
2240                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2241                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2242
2243                 /* must be integer multiple of the DIF block length */
2244                 BUG_ON(protgroup_len % 8);
2245
2246                 pde7 = (struct lpfc_pde7 *) bpl;
2247                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2248                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2249
2250                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2251                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2252
2253                 protgrp_blks = protgroup_len / 8;
2254                 protgrp_bytes = protgrp_blks * blksize;
2255
2256                 /* check if this pde is crossing the 4K boundary; if so split */
2257                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2258                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2259                         protgroup_offset += protgroup_remainder;
2260                         protgrp_blks = protgroup_remainder / 8;
2261                         protgrp_bytes = protgrp_blks * blksize;
2262                 } else {
2263                         protgroup_offset = 0;
2264                         curr_prot++;
2265                 }
2266
2267                 num_bde++;
2268
2269                 /* setup BDE's for data blocks associated with DIF data */
2270                 pgdone = 0;
2271                 subtotal = 0; /* total bytes processed for current prot grp */
2272                 while (!pgdone) {
2273                         /* Check to see if we ran out of space */
2274                         if (num_bde >= phba->cfg_total_seg_cnt)
2275                                 return num_bde + 1;
2276
2277                         if (!sgde) {
2278                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2279                                         "9065 BLKGRD:%s Invalid data segment\n",
2280                                                 __func__);
2281                                 return 0;
2282                         }
2283                         bpl++;
2284                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2285                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2286                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2287
2288                         remainder = sg_dma_len(sgde) - split_offset;
2289
2290                         if ((subtotal + remainder) <= protgrp_bytes) {
2291                                 /* we can use this whole buffer */
2292                                 bpl->tus.f.bdeSize = remainder;
2293                                 split_offset = 0;
2294
2295                                 if ((subtotal + remainder) == protgrp_bytes)
2296                                         pgdone = 1;
2297                         } else {
2298                                 /* must split this buffer with next prot grp */
2299                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2300                                 split_offset += bpl->tus.f.bdeSize;
2301                         }
2302
2303                         subtotal += bpl->tus.f.bdeSize;
2304
2305                         if (datadir == DMA_TO_DEVICE)
2306                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2307                         else
2308                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2309                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2310
2311                         num_bde++;
2312                         curr_data++;
2313
2314                         if (split_offset)
2315                                 break;
2316
2317                         /* Move to the next s/g segment if possible */
2318                         sgde = sg_next(sgde);
2319
2320                 }
2321
2322                 if (protgroup_offset) {
2323                         /* update the reference tag */
2324                         reftag += protgrp_blks;
2325                         bpl++;
2326                         continue;
2327                 }
2328
2329                 /* are we done ? */
2330                 if (curr_prot == protcnt) {
2331                         alldone = 1;
2332                 } else if (curr_prot < protcnt) {
2333                         /* advance to next prot buffer */
2334                         sgpe = sg_next(sgpe);
2335                         bpl++;
2336
2337                         /* update the reference tag */
2338                         reftag += protgrp_blks;
2339                 } else {
2340                         /* if we're here, we have a bug */
2341                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2342                                 "9054 BLKGRD: bug in %s\n", __func__);
2343                 }
2344
2345         } while (!alldone);
2346 out:
2347
2348         return num_bde;
2349 }
2350
2351 /**
2352  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2353  * @phba: The Hba for which this call is being executed.
2354  * @sc: pointer to scsi command we're working on
2355  * @sgl: pointer to buffer list for protection groups
2356  * @datacnt: number of segments of data that have been dma mapped
2357  *
2358  * This function sets up SGL buffer list for protection groups of
2359  * type LPFC_PG_TYPE_NO_DIF
2360  *
2361  * This is usually used when the HBA is instructed to generate
2362  * DIFs and insert them into data stream (or strip DIF from
2363  * incoming data stream)
2364  *
2365  * The buffer list consists of just one protection group described
2366  * below:
2367  *                                +-------------------------+
2368  *   start of prot group  -->     |         DI_SEED         |
2369  *                                +-------------------------+
2370  *                                |         Data SGE        |
2371  *                                +-------------------------+
2372  *                                |more Data SGE's ... (opt)|
2373  *                                +-------------------------+
2374  *
2375  *
2376  * Note: Data s/g buffers have been dma mapped
2377  *
2378  * Returns the number of SGEs added to the SGL.
2379  **/
2380 static int
2381 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2382                 struct sli4_sge *sgl, int datasegcnt)
2383 {
2384         struct scatterlist *sgde = NULL; /* s/g data entry */
2385         struct sli4_sge_diseed *diseed = NULL;
2386         dma_addr_t physaddr;
2387         int i = 0, num_sge = 0, status;
2388         uint32_t reftag;
2389         unsigned blksize;
2390         uint8_t txop, rxop;
2391 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2392         uint32_t rc;
2393 #endif
2394         uint32_t checking = 1;
2395         uint32_t dma_len;
2396         uint32_t dma_offset = 0;
2397
2398         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2399         if (status)
2400                 goto out;
2401
2402         /* extract some info from the scsi command for pde*/
2403         blksize = lpfc_cmd_blksize(sc);
2404         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2405
2406 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2407         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2408         if (rc) {
2409                 if (rc & BG_ERR_SWAP)
2410                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2411                 if (rc & BG_ERR_CHECK)
2412                         checking = 0;
2413         }
2414 #endif
2415
2416         /* setup DISEED with what we have */
2417         diseed = (struct sli4_sge_diseed *) sgl;
2418         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2419         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2420
2421         /* Endianness conversion if necessary */
2422         diseed->ref_tag = cpu_to_le32(reftag);
2423         diseed->ref_tag_tran = diseed->ref_tag;
2424
2425         /*
2426          * We only need to check the data on READs, for WRITEs
2427          * protection data is automatically generated, not checked.
2428          */
2429         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2430                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2431                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2432                 else
2433                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2434
2435                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2436                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2437                 else
2438                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2439         }
2440
2441         /* setup DISEED with the rest of the info */
2442         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2443         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2444
2445         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2446         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2447
2448         /* Endianness conversion if necessary for DISEED */
2449         diseed->word2 = cpu_to_le32(diseed->word2);
2450         diseed->word3 = cpu_to_le32(diseed->word3);
2451
2452         /* advance bpl and increment sge count */
2453         num_sge++;
2454         sgl++;
2455
2456         /* assumption: caller has already run dma_map_sg on command data */
2457         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2458                 physaddr = sg_dma_address(sgde);
2459                 dma_len = sg_dma_len(sgde);
2460                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2461                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2462                 if ((i + 1) == datasegcnt)
2463                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2464                 else
2465                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2466                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2467                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2468
2469                 sgl->sge_len = cpu_to_le32(dma_len);
2470                 dma_offset += dma_len;
2471
2472                 sgl++;
2473                 num_sge++;
2474         }
2475
2476 out:
2477         return num_sge;
2478 }
2479
2480 /**
2481  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2482  * @phba: The Hba for which this call is being executed.
2483  * @sc: pointer to scsi command we're working on
2484  * @sgl: pointer to buffer list for protection groups
2485  * @datacnt: number of segments of data that have been dma mapped
2486  * @protcnt: number of segment of protection data that have been dma mapped
2487  *
2488  * This function sets up SGL buffer list for protection groups of
2489  * type LPFC_PG_TYPE_DIF
2490  *
2491  * This is usually used when DIFs are in their own buffers,
2492  * separate from the data. The HBA can then by instructed
2493  * to place the DIFs in the outgoing stream.  For read operations,
2494  * The HBA could extract the DIFs and place it in DIF buffers.
2495  *
2496  * The buffer list for this type consists of one or more of the
2497  * protection groups described below:
2498  *                                    +-------------------------+
2499  *   start of first prot group  -->   |         DISEED          |
2500  *                                    +-------------------------+
2501  *                                    |      DIF (Prot SGE)     |
2502  *                                    +-------------------------+
2503  *                                    |        Data SGE         |
2504  *                                    +-------------------------+
2505  *                                    |more Data SGE's ... (opt)|
2506  *                                    +-------------------------+
2507  *   start of new  prot group  -->    |         DISEED          |
2508  *                                    +-------------------------+
2509  *                                    |          ...            |
2510  *                                    +-------------------------+
2511  *
2512  * Note: It is assumed that both data and protection s/g buffers have been
2513  *       mapped for DMA
2514  *
2515  * Returns the number of SGEs added to the SGL.
2516  **/
2517 static int
2518 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2519                 struct sli4_sge *sgl, int datacnt, int protcnt)
2520 {
2521         struct scatterlist *sgde = NULL; /* s/g data entry */
2522         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2523         struct sli4_sge_diseed *diseed = NULL;
2524         dma_addr_t dataphysaddr, protphysaddr;
2525         unsigned short curr_data = 0, curr_prot = 0;
2526         unsigned int split_offset;
2527         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2528         unsigned int protgrp_blks, protgrp_bytes;
2529         unsigned int remainder, subtotal;
2530         int status;
2531         unsigned char pgdone = 0, alldone = 0;
2532         unsigned blksize;
2533         uint32_t reftag;
2534         uint8_t txop, rxop;
2535         uint32_t dma_len;
2536 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2537         uint32_t rc;
2538 #endif
2539         uint32_t checking = 1;
2540         uint32_t dma_offset = 0;
2541         int num_sge = 0;
2542
2543         sgpe = scsi_prot_sglist(sc);
2544         sgde = scsi_sglist(sc);
2545
2546         if (!sgpe || !sgde) {
2547                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2548                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2549                                 sgpe, sgde);
2550                 return 0;
2551         }
2552
2553         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2554         if (status)
2555                 goto out;
2556
2557         /* extract some info from the scsi command */
2558         blksize = lpfc_cmd_blksize(sc);
2559         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2560
2561 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2562         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2563         if (rc) {
2564                 if (rc & BG_ERR_SWAP)
2565                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2566                 if (rc & BG_ERR_CHECK)
2567                         checking = 0;
2568         }
2569 #endif
2570
2571         split_offset = 0;
2572         do {
2573                 /* Check to see if we ran out of space */
2574                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2575                         return num_sge + 3;
2576
2577                 /* setup DISEED with what we have */
2578                 diseed = (struct sli4_sge_diseed *) sgl;
2579                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2580                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2581
2582                 /* Endianness conversion if necessary */
2583                 diseed->ref_tag = cpu_to_le32(reftag);
2584                 diseed->ref_tag_tran = diseed->ref_tag;
2585
2586                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2587                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2588
2589                 } else {
2590                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2591                         /*
2592                          * When in this mode, the hardware will replace
2593                          * the guard tag from the host with a
2594                          * newly generated good CRC for the wire.
2595                          * Switch to raw mode here to avoid this
2596                          * behavior. What the host sends gets put on the wire.
2597                          */
2598                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2599                                 txop = BG_OP_RAW_MODE;
2600                                 rxop = BG_OP_RAW_MODE;
2601                         }
2602                 }
2603
2604
2605                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2606                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2607                 else
2608                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2609
2610                 /* setup DISEED with the rest of the info */
2611                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2612                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2613
2614                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2615                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2616
2617                 /* Endianness conversion if necessary for DISEED */
2618                 diseed->word2 = cpu_to_le32(diseed->word2);
2619                 diseed->word3 = cpu_to_le32(diseed->word3);
2620
2621                 /* advance sgl and increment bde count */
2622                 num_sge++;
2623                 sgl++;
2624
2625                 /* setup the first BDE that points to protection buffer */
2626                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2627                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2628
2629                 /* must be integer multiple of the DIF block length */
2630                 BUG_ON(protgroup_len % 8);
2631
2632                 /* Now setup DIF SGE */
2633                 sgl->word2 = 0;
2634                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2635                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2636                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2637                 sgl->word2 = cpu_to_le32(sgl->word2);
2638
2639                 protgrp_blks = protgroup_len / 8;
2640                 protgrp_bytes = protgrp_blks * blksize;
2641
2642                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2643                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2644                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2645                         protgroup_offset += protgroup_remainder;
2646                         protgrp_blks = protgroup_remainder / 8;
2647                         protgrp_bytes = protgrp_blks * blksize;
2648                 } else {
2649                         protgroup_offset = 0;
2650                         curr_prot++;
2651                 }
2652
2653                 num_sge++;
2654
2655                 /* setup SGE's for data blocks associated with DIF data */
2656                 pgdone = 0;
2657                 subtotal = 0; /* total bytes processed for current prot grp */
2658                 while (!pgdone) {
2659                         /* Check to see if we ran out of space */
2660                         if (num_sge >= phba->cfg_total_seg_cnt)
2661                                 return num_sge + 1;
2662
2663                         if (!sgde) {
2664                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2665                                         "9086 BLKGRD:%s Invalid data segment\n",
2666                                                 __func__);
2667                                 return 0;
2668                         }
2669                         sgl++;
2670                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2671
2672                         remainder = sg_dma_len(sgde) - split_offset;
2673
2674                         if ((subtotal + remainder) <= protgrp_bytes) {
2675                                 /* we can use this whole buffer */
2676                                 dma_len = remainder;
2677                                 split_offset = 0;
2678
2679                                 if ((subtotal + remainder) == protgrp_bytes)
2680                                         pgdone = 1;
2681                         } else {
2682                                 /* must split this buffer with next prot grp */
2683                                 dma_len = protgrp_bytes - subtotal;
2684                                 split_offset += dma_len;
2685                         }
2686
2687                         subtotal += dma_len;
2688
2689                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2690                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2691                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2692                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2693                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2694
2695                         sgl->sge_len = cpu_to_le32(dma_len);
2696                         dma_offset += dma_len;
2697
2698                         num_sge++;
2699                         curr_data++;
2700
2701                         if (split_offset)
2702                                 break;
2703
2704                         /* Move to the next s/g segment if possible */
2705                         sgde = sg_next(sgde);
2706                 }
2707
2708                 if (protgroup_offset) {
2709                         /* update the reference tag */
2710                         reftag += protgrp_blks;
2711                         sgl++;
2712                         continue;
2713                 }
2714
2715                 /* are we done ? */
2716                 if (curr_prot == protcnt) {
2717                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2718                         alldone = 1;
2719                 } else if (curr_prot < protcnt) {
2720                         /* advance to next prot buffer */
2721                         sgpe = sg_next(sgpe);
2722                         sgl++;
2723
2724                         /* update the reference tag */
2725                         reftag += protgrp_blks;
2726                 } else {
2727                         /* if we're here, we have a bug */
2728                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2729                                 "9085 BLKGRD: bug in %s\n", __func__);
2730                 }
2731
2732         } while (!alldone);
2733
2734 out:
2735
2736         return num_sge;
2737 }
2738
2739 /**
2740  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2741  * @phba: The Hba for which this call is being executed.
2742  * @sc: pointer to scsi command we're working on
2743  *
2744  * Given a SCSI command that supports DIF, determine composition of protection
2745  * groups involved in setting up buffer lists
2746  *
2747  * Returns: Protection group type (with or without DIF)
2748  *
2749  **/
2750 static int
2751 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2752 {
2753         int ret = LPFC_PG_TYPE_INVALID;
2754         unsigned char op = scsi_get_prot_op(sc);
2755
2756         switch (op) {
2757         case SCSI_PROT_READ_STRIP:
2758         case SCSI_PROT_WRITE_INSERT:
2759                 ret = LPFC_PG_TYPE_NO_DIF;
2760                 break;
2761         case SCSI_PROT_READ_INSERT:
2762         case SCSI_PROT_WRITE_STRIP:
2763         case SCSI_PROT_READ_PASS:
2764         case SCSI_PROT_WRITE_PASS:
2765                 ret = LPFC_PG_TYPE_DIF_BUF;
2766                 break;
2767         default:
2768                 if (phba)
2769                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2770                                         "9021 Unsupported protection op:%d\n",
2771                                         op);
2772                 break;
2773         }
2774         return ret;
2775 }
2776
2777 /**
2778  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2779  * @phba: The Hba for which this call is being executed.
2780  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2781  *
2782  * Adjust the data length to account for how much data
2783  * is actually on the wire.
2784  *
2785  * returns the adjusted data length
2786  **/
2787 static int
2788 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2789                        struct lpfc_scsi_buf *lpfc_cmd)
2790 {
2791         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2792         int fcpdl;
2793
2794         fcpdl = scsi_bufflen(sc);
2795
2796         /* Check if there is protection data on the wire */
2797         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2798                 /* Read check for protection data */
2799                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2800                         return fcpdl;
2801
2802         } else {
2803                 /* Write check for protection data */
2804                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2805                         return fcpdl;
2806         }
2807
2808         /*
2809          * If we are in DIF Type 1 mode every data block has a 8 byte
2810          * DIF (trailer) attached to it. Must ajust FCP data length
2811          * to account for the protection data.
2812          */
2813         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2814
2815         return fcpdl;
2816 }
2817
2818 /**
2819  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2820  * @phba: The Hba for which this call is being executed.
2821  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2822  *
2823  * This is the protection/DIF aware version of
2824  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2825  * two functions eventually, but for now, it's here
2826  **/
2827 static int
2828 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2829                 struct lpfc_scsi_buf *lpfc_cmd)
2830 {
2831         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2832         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2833         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2834         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2835         uint32_t num_bde = 0;
2836         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2837         int prot_group_type = 0;
2838         int fcpdl;
2839
2840         /*
2841          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2842          *  fcp_rsp regions to the first data bde entry
2843          */
2844         bpl += 2;
2845         if (scsi_sg_count(scsi_cmnd)) {
2846                 /*
2847                  * The driver stores the segment count returned from pci_map_sg
2848                  * because this a count of dma-mappings used to map the use_sg
2849                  * pages.  They are not guaranteed to be the same for those
2850                  * architectures that implement an IOMMU.
2851                  */
2852                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2853                                         scsi_sglist(scsi_cmnd),
2854                                         scsi_sg_count(scsi_cmnd), datadir);
2855                 if (unlikely(!datasegcnt))
2856                         return 1;
2857
2858                 lpfc_cmd->seg_cnt = datasegcnt;
2859
2860                 /* First check if data segment count from SCSI Layer is good */
2861                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2862                         goto err;
2863
2864                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2865
2866                 switch (prot_group_type) {
2867                 case LPFC_PG_TYPE_NO_DIF:
2868
2869                         /* Here we need to add a PDE5 and PDE6 to the count */
2870                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2871                                 goto err;
2872
2873                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2874                                         datasegcnt);
2875                         /* we should have 2 or more entries in buffer list */
2876                         if (num_bde < 2)
2877                                 goto err;
2878                         break;
2879
2880                 case LPFC_PG_TYPE_DIF_BUF:
2881                         /*
2882                          * This type indicates that protection buffers are
2883                          * passed to the driver, so that needs to be prepared
2884                          * for DMA
2885                          */
2886                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2887                                         scsi_prot_sglist(scsi_cmnd),
2888                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2889                         if (unlikely(!protsegcnt)) {
2890                                 scsi_dma_unmap(scsi_cmnd);
2891                                 return 1;
2892                         }
2893
2894                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2895
2896                         /*
2897                          * There is a minimun of 4 BPLs used for every
2898                          * protection data segment.
2899                          */
2900                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2901                             (phba->cfg_total_seg_cnt - 2))
2902                                 goto err;
2903
2904                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2905                                         datasegcnt, protsegcnt);
2906                         /* we should have 3 or more entries in buffer list */
2907                         if ((num_bde < 3) ||
2908                             (num_bde > phba->cfg_total_seg_cnt))
2909                                 goto err;
2910                         break;
2911
2912                 case LPFC_PG_TYPE_INVALID:
2913                 default:
2914                         scsi_dma_unmap(scsi_cmnd);
2915                         lpfc_cmd->seg_cnt = 0;
2916
2917                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2918                                         "9022 Unexpected protection group %i\n",
2919                                         prot_group_type);
2920                         return 1;
2921                 }
2922         }
2923
2924         /*
2925          * Finish initializing those IOCB fields that are dependent on the
2926          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2927          * reinitialized since all iocb memory resources are used many times
2928          * for transmit, receive, and continuation bpl's.
2929          */
2930         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2931         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2932         iocb_cmd->ulpBdeCount = 1;
2933         iocb_cmd->ulpLe = 1;
2934
2935         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2936         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2937
2938         /*
2939          * Due to difference in data length between DIF/non-DIF paths,
2940          * we need to set word 4 of IOCB here
2941          */
2942         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2943
2944         return 0;
2945 err:
2946         if (lpfc_cmd->seg_cnt)
2947                 scsi_dma_unmap(scsi_cmnd);
2948         if (lpfc_cmd->prot_seg_cnt)
2949                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2950                              scsi_prot_sg_count(scsi_cmnd),
2951                              scsi_cmnd->sc_data_direction);
2952
2953         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2954                         "9023 Cannot setup S/G List for HBA"
2955                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2956                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2957                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2958                         prot_group_type, num_bde);
2959
2960         lpfc_cmd->seg_cnt = 0;
2961         lpfc_cmd->prot_seg_cnt = 0;
2962         return 1;
2963 }
2964
2965 /*
2966  * This function calcuates the T10 DIF guard tag
2967  * on the specified data using a CRC algorithmn
2968  * using crc_t10dif.
2969  */
2970 static uint16_t
2971 lpfc_bg_crc(uint8_t *data, int count)
2972 {
2973         uint16_t crc = 0;
2974         uint16_t x;
2975
2976         crc = crc_t10dif(data, count);
2977         x = cpu_to_be16(crc);
2978         return x;
2979 }
2980
2981 /*
2982  * This function calcuates the T10 DIF guard tag
2983  * on the specified data using a CSUM algorithmn
2984  * using ip_compute_csum.
2985  */
2986 static uint16_t
2987 lpfc_bg_csum(uint8_t *data, int count)
2988 {
2989         uint16_t ret;
2990
2991         ret = ip_compute_csum(data, count);
2992         return ret;
2993 }
2994
2995 /*
2996  * This function examines the protection data to try to determine
2997  * what type of T10-DIF error occurred.
2998  */
2999 static void
3000 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3001 {
3002         struct scatterlist *sgpe; /* s/g prot entry */
3003         struct scatterlist *sgde; /* s/g data entry */
3004         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3005         struct scsi_dif_tuple *src = NULL;
3006         uint8_t *data_src = NULL;
3007         uint16_t guard_tag, guard_type;
3008         uint16_t start_app_tag, app_tag;
3009         uint32_t start_ref_tag, ref_tag;
3010         int prot, protsegcnt;
3011         int err_type, len, data_len;
3012         int chk_ref, chk_app, chk_guard;
3013         uint16_t sum;
3014         unsigned blksize;
3015
3016         err_type = BGS_GUARD_ERR_MASK;
3017         sum = 0;
3018         guard_tag = 0;
3019
3020         /* First check to see if there is protection data to examine */
3021         prot = scsi_get_prot_op(cmd);
3022         if ((prot == SCSI_PROT_READ_STRIP) ||
3023             (prot == SCSI_PROT_WRITE_INSERT) ||
3024             (prot == SCSI_PROT_NORMAL))
3025                 goto out;
3026
3027         /* Currently the driver just supports ref_tag and guard_tag checking */
3028         chk_ref = 1;
3029         chk_app = 0;
3030         chk_guard = 0;
3031
3032         /* Setup a ptr to the protection data provided by the SCSI host */
3033         sgpe = scsi_prot_sglist(cmd);
3034         protsegcnt = lpfc_cmd->prot_seg_cnt;
3035
3036         if (sgpe && protsegcnt) {
3037
3038                 /*
3039                  * We will only try to verify guard tag if the segment
3040                  * data length is a multiple of the blksize.
3041                  */
3042                 sgde = scsi_sglist(cmd);
3043                 blksize = lpfc_cmd_blksize(cmd);
3044                 data_src = (uint8_t *)sg_virt(sgde);
3045                 data_len = sgde->length;
3046                 if ((data_len & (blksize - 1)) == 0)
3047                         chk_guard = 1;
3048                 guard_type = scsi_host_get_guard(cmd->device->host);
3049
3050                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3051                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
3052                 start_app_tag = src->app_tag;
3053                 len = sgpe->length;
3054                 while (src && protsegcnt) {
3055                         while (len) {
3056
3057                                 /*
3058                                  * First check to see if a protection data
3059                                  * check is valid
3060                                  */
3061                                 if ((src->ref_tag == 0xffffffff) ||
3062                                     (src->app_tag == 0xffff)) {
3063                                         start_ref_tag++;
3064                                         goto skipit;
3065                                 }
3066
3067                                 /* First Guard Tag checking */
3068                                 if (chk_guard) {
3069                                         guard_tag = src->guard_tag;
3070                                         if (lpfc_cmd_guard_csum(cmd))
3071                                                 sum = lpfc_bg_csum(data_src,
3072                                                                    blksize);
3073                                         else
3074                                                 sum = lpfc_bg_crc(data_src,
3075                                                                   blksize);
3076                                         if ((guard_tag != sum)) {
3077                                                 err_type = BGS_GUARD_ERR_MASK;
3078                                                 goto out;
3079                                         }
3080                                 }
3081
3082                                 /* Reference Tag checking */
3083                                 ref_tag = be32_to_cpu(src->ref_tag);
3084                                 if (chk_ref && (ref_tag != start_ref_tag)) {
3085                                         err_type = BGS_REFTAG_ERR_MASK;
3086                                         goto out;
3087                                 }
3088                                 start_ref_tag++;
3089
3090                                 /* App Tag checking */
3091                                 app_tag = src->app_tag;
3092                                 if (chk_app && (app_tag != start_app_tag)) {
3093                                         err_type = BGS_APPTAG_ERR_MASK;
3094                                         goto out;
3095                                 }
3096 skipit:
3097                                 len -= sizeof(struct scsi_dif_tuple);
3098                                 if (len < 0)
3099                                         len = 0;
3100                                 src++;
3101
3102                                 data_src += blksize;
3103                                 data_len -= blksize;
3104
3105                                 /*
3106                                  * Are we at the end of the Data segment?
3107                                  * The data segment is only used for Guard
3108                                  * tag checking.
3109                                  */
3110                                 if (chk_guard && (data_len == 0)) {
3111                                         chk_guard = 0;
3112                                         sgde = sg_next(sgde);
3113                                         if (!sgde)
3114                                                 goto out;
3115
3116                                         data_src = (uint8_t *)sg_virt(sgde);
3117                                         data_len = sgde->length;
3118                                         if ((data_len & (blksize - 1)) == 0)
3119                                                 chk_guard = 1;
3120                                 }
3121                         }
3122
3123                         /* Goto the next Protection data segment */
3124                         sgpe = sg_next(sgpe);
3125                         if (sgpe) {
3126                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3127                                 len = sgpe->length;
3128                         } else {
3129                                 src = NULL;
3130                         }
3131                         protsegcnt--;
3132                 }
3133         }
3134 out:
3135         if (err_type == BGS_GUARD_ERR_MASK) {
3136                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3137                                         0x10, 0x1);
3138                 cmd->result = DRIVER_SENSE << 24
3139                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3140                 phba->bg_guard_err_cnt++;
3141                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3142                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3143                                 (unsigned long)scsi_get_lba(cmd),
3144                                 sum, guard_tag);
3145
3146         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3147                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3148                                         0x10, 0x3);
3149                 cmd->result = DRIVER_SENSE << 24
3150                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3151
3152                 phba->bg_reftag_err_cnt++;
3153                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3154                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3155                                 (unsigned long)scsi_get_lba(cmd),
3156                                 ref_tag, start_ref_tag);
3157
3158         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3159                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3160                                         0x10, 0x2);
3161                 cmd->result = DRIVER_SENSE << 24
3162                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3163
3164                 phba->bg_apptag_err_cnt++;
3165                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3166                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3167                                 (unsigned long)scsi_get_lba(cmd),
3168                                 app_tag, start_app_tag);
3169         }
3170 }
3171
3172
3173 /*
3174  * This function checks for BlockGuard errors detected by
3175  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3176  * sense buffer will be set accordingly, paired with
3177  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3178  * detected corruption.
3179  *
3180  * Returns:
3181  *  0 - No error found
3182  *  1 - BlockGuard error found
3183  * -1 - Internal error (bad profile, ...etc)
3184  */
3185 static int
3186 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3187                         struct lpfc_iocbq *pIocbOut)
3188 {
3189         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3190         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3191         int ret = 0;
3192         uint32_t bghm = bgf->bghm;
3193         uint32_t bgstat = bgf->bgstat;
3194         uint64_t failing_sector = 0;
3195
3196         spin_lock(&_dump_buf_lock);
3197         if (!_dump_buf_done) {
3198                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3199                         " Data for %u blocks to debugfs\n",
3200                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3201                 lpfc_debug_save_data(phba, cmd);
3202
3203                 /* If we have a prot sgl, save the DIF buffer */
3204                 if (lpfc_prot_group_type(phba, cmd) ==
3205                                 LPFC_PG_TYPE_DIF_BUF) {
3206                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3207                                 "Saving DIF for %u blocks to debugfs\n",
3208                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3209                         lpfc_debug_save_dif(phba, cmd);
3210                 }
3211
3212                 _dump_buf_done = 1;
3213         }
3214         spin_unlock(&_dump_buf_lock);
3215
3216         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3217                 cmd->result = ScsiResult(DID_ERROR, 0);
3218                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3219                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3220                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3221                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3222                                 (unsigned long long)scsi_get_lba(cmd),
3223                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3224                 ret = (-1);
3225                 goto out;
3226         }
3227
3228         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3229                 cmd->result = ScsiResult(DID_ERROR, 0);
3230                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3231                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3232                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3233                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3234                                 (unsigned long long)scsi_get_lba(cmd),
3235                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3236                 ret = (-1);
3237                 goto out;
3238         }
3239
3240         if (lpfc_bgs_get_guard_err(bgstat)) {
3241                 ret = 1;
3242
3243                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3244                                 0x10, 0x1);
3245                 cmd->result = DRIVER_SENSE << 24
3246                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3247                 phba->bg_guard_err_cnt++;
3248                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3249                                 "9055 BLKGRD: Guard Tag error in cmd"
3250                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3251                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3252                                 (unsigned long long)scsi_get_lba(cmd),
3253                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3254         }
3255
3256         if (lpfc_bgs_get_reftag_err(bgstat)) {
3257                 ret = 1;
3258
3259                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3260                                 0x10, 0x3);
3261                 cmd->result = DRIVER_SENSE << 24
3262                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3263
3264                 phba->bg_reftag_err_cnt++;
3265                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3266                                 "9056 BLKGRD: Ref Tag error in cmd"
3267                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3268                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3269                                 (unsigned long long)scsi_get_lba(cmd),
3270                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3271         }
3272
3273         if (lpfc_bgs_get_apptag_err(bgstat)) {
3274                 ret = 1;
3275
3276                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3277                                 0x10, 0x2);
3278                 cmd->result = DRIVER_SENSE << 24
3279                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3280
3281                 phba->bg_apptag_err_cnt++;
3282                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3283                                 "9061 BLKGRD: App Tag error in cmd"
3284                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3285                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3286                                 (unsigned long long)scsi_get_lba(cmd),
3287                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3288         }
3289
3290         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3291                 /*
3292                  * setup sense data descriptor 0 per SPC-4 as an information
3293                  * field, and put the failing LBA in it.
3294                  * This code assumes there was also a guard/app/ref tag error
3295                  * indication.
3296                  */
3297                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3298                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3299                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3300                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3301
3302                 /* bghm is a "on the wire" FC frame based count */
3303                 switch (scsi_get_prot_op(cmd)) {
3304                 case SCSI_PROT_READ_INSERT:
3305                 case SCSI_PROT_WRITE_STRIP:
3306                         bghm /= cmd->device->sector_size;
3307                         break;
3308                 case SCSI_PROT_READ_STRIP:
3309                 case SCSI_PROT_WRITE_INSERT:
3310                 case SCSI_PROT_READ_PASS:
3311                 case SCSI_PROT_WRITE_PASS:
3312                         bghm /= (cmd->device->sector_size +
3313                                 sizeof(struct scsi_dif_tuple));
3314                         break;
3315                 }
3316
3317                 failing_sector = scsi_get_lba(cmd);
3318                 failing_sector += bghm;
3319
3320                 /* Descriptor Information */
3321                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3322         }
3323
3324         if (!ret) {
3325                 /* No error was reported - problem in FW? */
3326                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3327                                 "9057 BLKGRD: Unknown error in cmd"
3328                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3329                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3330                                 (unsigned long long)scsi_get_lba(cmd),
3331                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3332
3333                 /* Calcuate what type of error it was */
3334                 lpfc_calc_bg_err(phba, lpfc_cmd);
3335         }
3336 out:
3337         return ret;
3338 }
3339
3340 /**
3341  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3342  * @phba: The Hba for which this call is being executed.
3343  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3344  *
3345  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3346  * field of @lpfc_cmd for device with SLI-4 interface spec.
3347  *
3348  * Return codes:
3349  *      1 - Error
3350  *      0 - Success
3351  **/
3352 static int
3353 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3354 {
3355         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3356         struct scatterlist *sgel = NULL;
3357         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3358         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3359         struct sli4_sge *first_data_sgl;
3360         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3361         dma_addr_t physaddr;
3362         uint32_t num_bde = 0;
3363         uint32_t dma_len;
3364         uint32_t dma_offset = 0;
3365         int nseg;
3366         struct ulp_bde64 *bde;
3367
3368         /*
3369          * There are three possibilities here - use scatter-gather segment, use
3370          * the single mapping, or neither.  Start the lpfc command prep by
3371          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3372          * data bde entry.
3373          */
3374         if (scsi_sg_count(scsi_cmnd)) {
3375                 /*
3376                  * The driver stores the segment count returned from pci_map_sg
3377                  * because this a count of dma-mappings used to map the use_sg
3378                  * pages.  They are not guaranteed to be the same for those
3379                  * architectures that implement an IOMMU.
3380                  */
3381
3382                 nseg = scsi_dma_map(scsi_cmnd);
3383                 if (unlikely(!nseg))
3384                         return 1;
3385                 sgl += 1;
3386                 /* clear the last flag in the fcp_rsp map entry */
3387                 sgl->word2 = le32_to_cpu(sgl->word2);
3388                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3389                 sgl->word2 = cpu_to_le32(sgl->word2);
3390                 sgl += 1;
3391                 first_data_sgl = sgl;
3392                 lpfc_cmd->seg_cnt = nseg;
3393                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3394                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3395                                 " %s: Too many sg segments from "
3396                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3397                                 __func__, phba->cfg_sg_seg_cnt,
3398                                lpfc_cmd->seg_cnt);
3399                         lpfc_cmd->seg_cnt = 0;
3400                         scsi_dma_unmap(scsi_cmnd);
3401                         return 1;
3402                 }
3403
3404                 /*
3405                  * The driver established a maximum scatter-gather segment count
3406                  * during probe that limits the number of sg elements in any
3407                  * single scsi command.  Just run through the seg_cnt and format
3408                  * the sge's.
3409                  * When using SLI-3 the driver will try to fit all the BDEs into
3410                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3411                  * does for SLI-2 mode.
3412                  */
3413                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3414                         physaddr = sg_dma_address(sgel);
3415                         dma_len = sg_dma_len(sgel);
3416                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3417                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3418                         sgl->word2 = le32_to_cpu(sgl->word2);
3419                         if ((num_bde + 1) == nseg)
3420                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3421                         else
3422                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3423                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3424                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3425                         sgl->word2 = cpu_to_le32(sgl->word2);
3426                         sgl->sge_len = cpu_to_le32(dma_len);
3427                         dma_offset += dma_len;
3428                         sgl++;
3429                 }
3430                 /* setup the performance hint (first data BDE) if enabled */
3431                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3432                         bde = (struct ulp_bde64 *)
3433                                         &(iocb_cmd->unsli3.sli3Words[5]);
3434                         bde->addrLow = first_data_sgl->addr_lo;
3435                         bde->addrHigh = first_data_sgl->addr_hi;
3436                         bde->tus.f.bdeSize =
3437                                         le32_to_cpu(first_data_sgl->sge_len);
3438                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3439                         bde->tus.w = cpu_to_le32(bde->tus.w);
3440                 }
3441         } else {
3442                 sgl += 1;
3443                 /* clear the last flag in the fcp_rsp map entry */
3444                 sgl->word2 = le32_to_cpu(sgl->word2);
3445                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3446                 sgl->word2 = cpu_to_le32(sgl->word2);
3447         }
3448
3449         /*
3450          * Finish initializing those IOCB fields that are dependent on the
3451          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3452          * explicitly reinitialized.
3453          * all iocb memory resources are reused.
3454          */
3455         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3456
3457         /*
3458          * Due to difference in data length between DIF/non-DIF paths,
3459          * we need to set word 4 of IOCB here
3460          */
3461         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3462
3463         /*
3464          * If the OAS driver feature is enabled and the lun is enabled for
3465          * OAS, set the oas iocb related flags.
3466          */
3467         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3468                 scsi_cmnd->device->hostdata)->oas_enabled)
3469                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3470         return 0;
3471 }
3472
3473 /**
3474  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3475  * @phba: The Hba for which this call is being executed.
3476  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3477  *
3478  * This is the protection/DIF aware version of
3479  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3480  * two functions eventually, but for now, it's here
3481  **/
3482 static int
3483 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3484                 struct lpfc_scsi_buf *lpfc_cmd)
3485 {
3486         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3487         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3488         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3489         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3490         uint32_t num_sge = 0;
3491         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3492         int prot_group_type = 0;
3493         int fcpdl;
3494
3495         /*
3496          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3497          *  fcp_rsp regions to the first data sge entry
3498          */
3499         if (scsi_sg_count(scsi_cmnd)) {
3500                 /*
3501                  * The driver stores the segment count returned from pci_map_sg
3502                  * because this a count of dma-mappings used to map the use_sg
3503                  * pages.  They are not guaranteed to be the same for those
3504                  * architectures that implement an IOMMU.
3505                  */
3506                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3507                                         scsi_sglist(scsi_cmnd),
3508                                         scsi_sg_count(scsi_cmnd), datadir);
3509                 if (unlikely(!datasegcnt))
3510                         return 1;
3511
3512                 sgl += 1;
3513                 /* clear the last flag in the fcp_rsp map entry */
3514                 sgl->word2 = le32_to_cpu(sgl->word2);
3515                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3516                 sgl->word2 = cpu_to_le32(sgl->word2);
3517
3518                 sgl += 1;
3519                 lpfc_cmd->seg_cnt = datasegcnt;
3520
3521                 /* First check if data segment count from SCSI Layer is good */
3522                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3523                         goto err;
3524
3525                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3526
3527                 switch (prot_group_type) {
3528                 case LPFC_PG_TYPE_NO_DIF:
3529                         /* Here we need to add a DISEED to the count */
3530                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3531                                 goto err;
3532
3533                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3534                                         datasegcnt);
3535
3536                         /* we should have 2 or more entries in buffer list */
3537                         if (num_sge < 2)
3538                                 goto err;
3539                         break;
3540
3541                 case LPFC_PG_TYPE_DIF_BUF:
3542                         /*
3543                          * This type indicates that protection buffers are
3544                          * passed to the driver, so that needs to be prepared
3545                          * for DMA
3546                          */
3547                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3548                                         scsi_prot_sglist(scsi_cmnd),
3549                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3550                         if (unlikely(!protsegcnt)) {
3551                                 scsi_dma_unmap(scsi_cmnd);
3552                                 return 1;
3553                         }
3554
3555                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3556                         /*
3557                          * There is a minimun of 3 SGEs used for every
3558                          * protection data segment.
3559                          */
3560                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3561                             (phba->cfg_total_seg_cnt - 2))
3562                                 goto err;
3563
3564                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3565                                         datasegcnt, protsegcnt);
3566
3567                         /* we should have 3 or more entries in buffer list */
3568                         if ((num_sge < 3) ||
3569                             (num_sge > phba->cfg_total_seg_cnt))
3570                                 goto err;
3571                         break;
3572
3573                 case LPFC_PG_TYPE_INVALID:
3574                 default:
3575                         scsi_dma_unmap(scsi_cmnd);
3576                         lpfc_cmd->seg_cnt = 0;
3577
3578                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3579                                         "9083 Unexpected protection group %i\n",
3580                                         prot_group_type);
3581                         return 1;
3582                 }
3583         }
3584
3585         switch (scsi_get_prot_op(scsi_cmnd)) {
3586         case SCSI_PROT_WRITE_STRIP:
3587         case SCSI_PROT_READ_STRIP:
3588                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3589                 break;
3590         case SCSI_PROT_WRITE_INSERT:
3591         case SCSI_PROT_READ_INSERT:
3592                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3593                 break;
3594         case SCSI_PROT_WRITE_PASS:
3595         case SCSI_PROT_READ_PASS:
3596                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3597                 break;
3598         }
3599
3600         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3601         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3602
3603         /*
3604          * Due to difference in data length between DIF/non-DIF paths,
3605          * we need to set word 4 of IOCB here
3606          */
3607         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3608
3609         /*
3610          * If the OAS driver feature is enabled and the lun is enabled for
3611          * OAS, set the oas iocb related flags.
3612          */
3613         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3614                 scsi_cmnd->device->hostdata)->oas_enabled)
3615                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3616
3617         return 0;
3618 err:
3619         if (lpfc_cmd->seg_cnt)
3620                 scsi_dma_unmap(scsi_cmnd);
3621         if (lpfc_cmd->prot_seg_cnt)
3622                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3623                              scsi_prot_sg_count(scsi_cmnd),
3624                              scsi_cmnd->sc_data_direction);
3625
3626         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3627                         "9084 Cannot setup S/G List for HBA"
3628                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3629                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3630                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3631                         prot_group_type, num_sge);
3632
3633         lpfc_cmd->seg_cnt = 0;
3634         lpfc_cmd->prot_seg_cnt = 0;
3635         return 1;
3636 }
3637
3638 /**
3639  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3640  * @phba: The Hba for which this call is being executed.
3641  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3642  *
3643  * This routine wraps the actual DMA mapping function pointer from the
3644  * lpfc_hba struct.
3645  *
3646  * Return codes:
3647  *      1 - Error
3648  *      0 - Success
3649  **/
3650 static inline int
3651 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3652 {
3653         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3654 }
3655
3656 /**
3657  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3658  * using BlockGuard.
3659  * @phba: The Hba for which this call is being executed.
3660  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3661  *
3662  * This routine wraps the actual DMA mapping function pointer from the
3663  * lpfc_hba struct.
3664  *
3665  * Return codes:
3666  *      1 - Error
3667  *      0 - Success
3668  **/
3669 static inline int
3670 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3671 {
3672         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3673 }
3674
3675 /**
3676  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3677  * @phba: Pointer to hba context object.
3678  * @vport: Pointer to vport object.
3679  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3680  * @rsp_iocb: Pointer to response iocb object which reported error.
3681  *
3682  * This function posts an event when there is a SCSI command reporting
3683  * error from the scsi device.
3684  **/
3685 static void
3686 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3687                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3688         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3689         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3690         uint32_t resp_info = fcprsp->rspStatus2;
3691         uint32_t scsi_status = fcprsp->rspStatus3;
3692         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3693         struct lpfc_fast_path_event *fast_path_evt = NULL;
3694         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3695         unsigned long flags;
3696
3697         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3698                 return;
3699
3700         /* If there is queuefull or busy condition send a scsi event */
3701         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3702                 (cmnd->result == SAM_STAT_BUSY)) {
3703                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3704                 if (!fast_path_evt)
3705                         return;
3706                 fast_path_evt->un.scsi_evt.event_type =
3707                         FC_REG_SCSI_EVENT;
3708                 fast_path_evt->un.scsi_evt.subcategory =
3709                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3710                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3711                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3712                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3713                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3714                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3715                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3716         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3717                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3718                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3719                 if (!fast_path_evt)
3720                         return;
3721                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3722                         FC_REG_SCSI_EVENT;
3723                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3724                         LPFC_EVENT_CHECK_COND;
3725                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3726                         cmnd->device->lun;
3727                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3728                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3729                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3730                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3731                 fast_path_evt->un.check_cond_evt.sense_key =
3732                         cmnd->sense_buffer[2] & 0xf;
3733                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3734                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3735         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3736                      fcpi_parm &&
3737                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3738                         ((scsi_status == SAM_STAT_GOOD) &&
3739                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3740                 /*
3741                  * If status is good or resid does not match with fcp_param and
3742                  * there is valid fcpi_parm, then there is a read_check error
3743                  */
3744                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3745                 if (!fast_path_evt)
3746                         return;
3747                 fast_path_evt->un.read_check_error.header.event_type =
3748                         FC_REG_FABRIC_EVENT;
3749                 fast_path_evt->un.read_check_error.header.subcategory =
3750                         LPFC_EVENT_FCPRDCHKERR;
3751                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3752                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3753                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3754                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3755                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3756                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3757                 fast_path_evt->un.read_check_error.fcpiparam =
3758                         fcpi_parm;
3759         } else
3760                 return;
3761
3762         fast_path_evt->vport = vport;
3763         spin_lock_irqsave(&phba->hbalock, flags);
3764         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3765         spin_unlock_irqrestore(&phba->hbalock, flags);
3766         lpfc_worker_wake_up(phba);
3767         return;
3768 }
3769
3770 /**
3771  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3772  * @phba: The HBA for which this call is being executed.
3773  * @psb: The scsi buffer which is going to be un-mapped.
3774  *
3775  * This routine does DMA un-mapping of scatter gather list of scsi command
3776  * field of @lpfc_cmd for device with SLI-3 interface spec.
3777  **/
3778 static void
3779 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3780 {
3781         /*
3782          * There are only two special cases to consider.  (1) the scsi command
3783          * requested scatter-gather usage or (2) the scsi command allocated
3784          * a request buffer, but did not request use_sg.  There is a third
3785          * case, but it does not require resource deallocation.
3786          */
3787         if (psb->seg_cnt > 0)
3788                 scsi_dma_unmap(psb->pCmd);
3789         if (psb->prot_seg_cnt > 0)
3790                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3791                                 scsi_prot_sg_count(psb->pCmd),
3792                                 psb->pCmd->sc_data_direction);
3793 }
3794
3795 /**
3796  * lpfc_handler_fcp_err - FCP response handler
3797  * @vport: The virtual port for which this call is being executed.
3798  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3799  * @rsp_iocb: The response IOCB which contains FCP error.
3800  *
3801  * This routine is called to process response IOCB with status field
3802  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3803  * based upon SCSI and FCP error.
3804  **/
3805 static void
3806 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3807                     struct lpfc_iocbq *rsp_iocb)
3808 {
3809         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3810         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3811         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3812         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3813         uint32_t resp_info = fcprsp->rspStatus2;
3814         uint32_t scsi_status = fcprsp->rspStatus3;
3815         uint32_t *lp;
3816         uint32_t host_status = DID_OK;
3817         uint32_t rsplen = 0;
3818         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3819
3820
3821         /*
3822          *  If this is a task management command, there is no
3823          *  scsi packet associated with this lpfc_cmd.  The driver
3824          *  consumes it.
3825          */
3826         if (fcpcmd->fcpCntl2) {
3827                 scsi_status = 0;
3828                 goto out;
3829         }
3830
3831         if (resp_info & RSP_LEN_VALID) {
3832                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3833                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3834                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3835                                  "2719 Invalid response length: "
3836                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3837                                  cmnd->device->id,
3838                                  cmnd->device->lun, cmnd->cmnd[0],
3839                                  rsplen);
3840                         host_status = DID_ERROR;
3841                         goto out;
3842                 }
3843                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3844                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3845                                  "2757 Protocol failure detected during "
3846                                  "processing of FCP I/O op: "
3847                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3848                                  cmnd->device->id,
3849                                  cmnd->device->lun, cmnd->cmnd[0],
3850                                  fcprsp->rspInfo3);
3851                         host_status = DID_ERROR;
3852                         goto out;
3853                 }
3854         }
3855
3856         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3857                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3858                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3859                         snslen = SCSI_SENSE_BUFFERSIZE;
3860
3861                 if (resp_info & RSP_LEN_VALID)
3862                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3863                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3864         }
3865         lp = (uint32_t *)cmnd->sense_buffer;
3866
3867         /* special handling for under run conditions */
3868         if (!scsi_status && (resp_info & RESID_UNDER)) {
3869                 /* don't log under runs if fcp set... */
3870                 if (vport->cfg_log_verbose & LOG_FCP)
3871                         logit = LOG_FCP_ERROR;
3872                 /* unless operator says so */
3873                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3874                         logit = LOG_FCP_UNDER;
3875         }
3876
3877         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3878                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3879                          "Data: x%x x%x x%x x%x x%x\n",
3880                          cmnd->cmnd[0], scsi_status,
3881                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3882                          be32_to_cpu(fcprsp->rspResId),
3883                          be32_to_cpu(fcprsp->rspSnsLen),
3884                          be32_to_cpu(fcprsp->rspRspLen),
3885                          fcprsp->rspInfo3);
3886
3887         scsi_set_resid(cmnd, 0);
3888         if (resp_info & RESID_UNDER) {
3889                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3890
3891                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3892                                  "9025 FCP Read Underrun, expected %d, "
3893                                  "residual %d Data: x%x x%x x%x\n",
3894                                  be32_to_cpu(fcpcmd->fcpDl),
3895                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3896                                  cmnd->underflow);
3897
3898                 /*
3899                  * If there is an under run check if under run reported by
3900                  * storage array is same as the under run reported by HBA.
3901                  * If this is not same, there is a dropped frame.
3902                  */
3903                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3904                         fcpi_parm &&
3905                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3906                         lpfc_printf_vlog(vport, KERN_WARNING,
3907                                          LOG_FCP | LOG_FCP_ERROR,
3908                                          "9026 FCP Read Check Error "
3909                                          "and Underrun Data: x%x x%x x%x x%x\n",
3910                                          be32_to_cpu(fcpcmd->fcpDl),
3911                                          scsi_get_resid(cmnd), fcpi_parm,
3912                                          cmnd->cmnd[0]);
3913                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3914                         host_status = DID_ERROR;
3915                 }
3916                 /*
3917                  * The cmnd->underflow is the minimum number of bytes that must
3918                  * be transferred for this command.  Provided a sense condition
3919                  * is not present, make sure the actual amount transferred is at
3920                  * least the underflow value or fail.
3921                  */
3922                 if (!(resp_info & SNS_LEN_VALID) &&
3923                     (scsi_status == SAM_STAT_GOOD) &&
3924                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3925                      < cmnd->underflow)) {
3926                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3927                                          "9027 FCP command x%x residual "
3928                                          "underrun converted to error "
3929                                          "Data: x%x x%x x%x\n",
3930                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3931                                          scsi_get_resid(cmnd), cmnd->underflow);
3932                         host_status = DID_ERROR;
3933                 }
3934         } else if (resp_info & RESID_OVER) {
3935                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3936                                  "9028 FCP command x%x residual overrun error. "
3937                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3938                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3939                 host_status = DID_ERROR;
3940
3941         /*
3942          * Check SLI validation that all the transfer was actually done
3943          * (fcpi_parm should be zero). Apply check only to reads.
3944          */
3945         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
3946                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3947                                  "9029 FCP Read Check Error Data: "
3948                                  "x%x x%x x%x x%x x%x\n",
3949                                  be32_to_cpu(fcpcmd->fcpDl),
3950                                  be32_to_cpu(fcprsp->rspResId),
3951                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3952                 switch (scsi_status) {
3953                 case SAM_STAT_GOOD:
3954                 case SAM_STAT_CHECK_CONDITION:
3955                         /* Fabric dropped a data frame. Fail any successful
3956                          * command in which we detected dropped frames.
3957                          * A status of good or some check conditions could
3958                          * be considered a successful command.
3959                          */
3960                         host_status = DID_ERROR;
3961                         break;
3962                 }
3963                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3964         }
3965
3966  out:
3967         cmnd->result = ScsiResult(host_status, scsi_status);
3968         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3969 }
3970
3971 /**
3972  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3973  * @phba: The Hba for which this call is being executed.
3974  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3975  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3976  *
3977  * This routine assigns scsi command result by looking into response IOCB
3978  * status field appropriately. This routine handles QUEUE FULL condition as
3979  * well by ramping down device queue depth.
3980  **/
3981 static void
3982 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3983                         struct lpfc_iocbq *pIocbOut)
3984 {
3985         struct lpfc_scsi_buf *lpfc_cmd =
3986                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3987         struct lpfc_vport      *vport = pIocbIn->vport;
3988         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3989         struct lpfc_nodelist *pnode = rdata->pnode;
3990         struct scsi_cmnd *cmd;
3991         int result;
3992         int depth;
3993         unsigned long flags;
3994         struct lpfc_fast_path_event *fast_path_evt;
3995         struct Scsi_Host *shost;
3996         uint32_t queue_depth, scsi_id;
3997         uint32_t logit = LOG_FCP;
3998
3999         /* Sanity check on return of outstanding command */
4000         if (!(lpfc_cmd->pCmd))
4001                 return;
4002         cmd = lpfc_cmd->pCmd;
4003         shost = cmd->device->host;
4004
4005         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
4006         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
4007         /* pick up SLI4 exhange busy status from HBA */
4008         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
4009
4010 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4011         if (lpfc_cmd->prot_data_type) {
4012                 struct scsi_dif_tuple *src = NULL;
4013
4014                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4015                 /*
4016                  * Used to restore any changes to protection
4017                  * data for error injection.
4018                  */
4019                 switch (lpfc_cmd->prot_data_type) {
4020                 case LPFC_INJERR_REFTAG:
4021                         src->ref_tag =
4022                                 lpfc_cmd->prot_data;
4023                         break;
4024                 case LPFC_INJERR_APPTAG:
4025                         src->app_tag =
4026                                 (uint16_t)lpfc_cmd->prot_data;
4027                         break;
4028                 case LPFC_INJERR_GUARD:
4029                         src->guard_tag =
4030                                 (uint16_t)lpfc_cmd->prot_data;
4031                         break;
4032                 default:
4033                         break;
4034                 }
4035
4036                 lpfc_cmd->prot_data = 0;
4037                 lpfc_cmd->prot_data_type = 0;
4038                 lpfc_cmd->prot_data_segment = NULL;
4039         }
4040 #endif
4041         if (pnode && NLP_CHK_NODE_ACT(pnode))
4042                 atomic_dec(&pnode->cmd_pending);
4043
4044         if (lpfc_cmd->status) {
4045                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4046                     (lpfc_cmd->result & IOERR_DRVR_MASK))
4047                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4048                 else if (lpfc_cmd->status >= IOSTAT_CNT)
4049                         lpfc_cmd->status = IOSTAT_DEFAULT;
4050                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4051                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
4052                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4053                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4054                         logit = 0;
4055                 else
4056                         logit = LOG_FCP | LOG_FCP_UNDER;
4057                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4058                          "9030 FCP cmd x%x failed <%d/%lld> "
4059                          "status: x%x result: x%x "
4060                          "sid: x%x did: x%x oxid: x%x "
4061                          "Data: x%x x%x\n",
4062                          cmd->cmnd[0],
4063                          cmd->device ? cmd->device->id : 0xffff,
4064                          cmd->device ? cmd->device->lun : 0xffff,
4065                          lpfc_cmd->status, lpfc_cmd->result,
4066                          vport->fc_myDID,
4067                          (pnode) ? pnode->nlp_DID : 0,
4068                          phba->sli_rev == LPFC_SLI_REV4 ?
4069                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4070                          pIocbOut->iocb.ulpContext,
4071                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4072
4073                 switch (lpfc_cmd->status) {
4074                 case IOSTAT_FCP_RSP_ERROR:
4075                         /* Call FCP RSP handler to determine result */
4076                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4077                         break;
4078                 case IOSTAT_NPORT_BSY:
4079                 case IOSTAT_FABRIC_BSY:
4080                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4081                         fast_path_evt = lpfc_alloc_fast_evt(phba);
4082                         if (!fast_path_evt)
4083                                 break;
4084                         fast_path_evt->un.fabric_evt.event_type =
4085                                 FC_REG_FABRIC_EVENT;
4086                         fast_path_evt->un.fabric_evt.subcategory =
4087                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4088                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4089                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4090                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4091                                         &pnode->nlp_portname,
4092                                         sizeof(struct lpfc_name));
4093                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4094                                         &pnode->nlp_nodename,
4095                                         sizeof(struct lpfc_name));
4096                         }
4097                         fast_path_evt->vport = vport;
4098                         fast_path_evt->work_evt.evt =
4099                                 LPFC_EVT_FASTPATH_MGMT_EVT;
4100                         spin_lock_irqsave(&phba->hbalock, flags);
4101                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
4102                                 &phba->work_list);
4103                         spin_unlock_irqrestore(&phba->hbalock, flags);
4104                         lpfc_worker_wake_up(phba);
4105                         break;
4106                 case IOSTAT_LOCAL_REJECT:
4107                 case IOSTAT_REMOTE_STOP:
4108                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4109                             lpfc_cmd->result ==
4110                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4111                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4112                             lpfc_cmd->result ==
4113                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4114                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4115                                 break;
4116                         }
4117                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4118                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4119                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4120                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4121                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
4122                                 break;
4123                         }
4124                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4125                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4126                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4127                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4128                                         /*
4129                                          * This is a response for a BG enabled
4130                                          * cmd. Parse BG error
4131                                          */
4132                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4133                                                         pIocbOut);
4134                                         break;
4135                                 } else {
4136                                         lpfc_printf_vlog(vport, KERN_WARNING,
4137                                                         LOG_BG,
4138                                                         "9031 non-zero BGSTAT "
4139                                                         "on unprotected cmd\n");
4140                                 }
4141                         }
4142                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4143                                 && (phba->sli_rev == LPFC_SLI_REV4)
4144                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4145                                 /* This IO was aborted by the target, we don't
4146                                  * know the rxid and because we did not send the
4147                                  * ABTS we cannot generate and RRQ.
4148                                  */
4149                                 lpfc_set_rrq_active(phba, pnode,
4150                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4151                                         0, 0);
4152                         }
4153                 /* else: fall through */
4154                 default:
4155                         cmd->result = ScsiResult(DID_ERROR, 0);
4156                         break;
4157                 }
4158
4159                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4160                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4161                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4162                                                  SAM_STAT_BUSY);
4163         } else
4164                 cmd->result = ScsiResult(DID_OK, 0);
4165
4166         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4167                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4168
4169                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4170                                  "0710 Iodone <%d/%llu> cmd %p, error "
4171                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4172                                  cmd->device->id, cmd->device->lun, cmd,
4173                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4174                                  scsi_get_resid(cmd));
4175         }
4176
4177         lpfc_update_stats(phba, lpfc_cmd);
4178         result = cmd->result;
4179         if (vport->cfg_max_scsicmpl_time &&
4180            time_after(jiffies, lpfc_cmd->start_time +
4181                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4182                 spin_lock_irqsave(shost->host_lock, flags);
4183                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4184                         if (pnode->cmd_qdepth >
4185                                 atomic_read(&pnode->cmd_pending) &&
4186                                 (atomic_read(&pnode->cmd_pending) >
4187                                 LPFC_MIN_TGT_QDEPTH) &&
4188                                 ((cmd->cmnd[0] == READ_10) ||
4189                                 (cmd->cmnd[0] == WRITE_10)))
4190                                 pnode->cmd_qdepth =
4191                                         atomic_read(&pnode->cmd_pending);
4192
4193                         pnode->last_change_time = jiffies;
4194                 }
4195                 spin_unlock_irqrestore(shost->host_lock, flags);
4196         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4197                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4198                    time_after(jiffies, pnode->last_change_time +
4199                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4200                         spin_lock_irqsave(shost->host_lock, flags);
4201                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4202                                 / 100;
4203                         depth = depth ? depth : 1;
4204                         pnode->cmd_qdepth += depth;
4205                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4206                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4207                         pnode->last_change_time = jiffies;
4208                         spin_unlock_irqrestore(shost->host_lock, flags);
4209                 }
4210         }
4211
4212         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4213
4214         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4215         queue_depth = cmd->device->queue_depth;
4216         scsi_id = cmd->device->id;
4217         cmd->scsi_done(cmd);
4218
4219         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4220                 spin_lock_irqsave(&phba->hbalock, flags);
4221                 lpfc_cmd->pCmd = NULL;
4222                 spin_unlock_irqrestore(&phba->hbalock, flags);
4223
4224                 /*
4225                  * If there is a thread waiting for command completion
4226                  * wake up the thread.
4227                  */
4228                 spin_lock_irqsave(shost->host_lock, flags);
4229                 if (lpfc_cmd->waitq)
4230                         wake_up(lpfc_cmd->waitq);
4231                 spin_unlock_irqrestore(shost->host_lock, flags);
4232                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4233                 return;
4234         }
4235
4236         spin_lock_irqsave(&phba->hbalock, flags);
4237         lpfc_cmd->pCmd = NULL;
4238         spin_unlock_irqrestore(&phba->hbalock, flags);
4239
4240         /*
4241          * If there is a thread waiting for command completion
4242          * wake up the thread.
4243          */
4244         spin_lock_irqsave(shost->host_lock, flags);
4245         if (lpfc_cmd->waitq)
4246                 wake_up(lpfc_cmd->waitq);
4247         spin_unlock_irqrestore(shost->host_lock, flags);
4248
4249         lpfc_release_scsi_buf(phba, lpfc_cmd);
4250 }
4251
4252 /**
4253  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4254  * @data: A pointer to the immediate command data portion of the IOCB.
4255  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4256  *
4257  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4258  * byte swapping the data to big endian format for transmission on the wire.
4259  **/
4260 static void
4261 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4262 {
4263         int i, j;
4264         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4265              i += sizeof(uint32_t), j++) {
4266                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4267         }
4268 }
4269
4270 /**
4271  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4272  * @vport: The virtual port for which this call is being executed.
4273  * @lpfc_cmd: The scsi command which needs to send.
4274  * @pnode: Pointer to lpfc_nodelist.
4275  *
4276  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4277  * to transfer for device with SLI3 interface spec.
4278  **/
4279 static void
4280 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4281                     struct lpfc_nodelist *pnode)
4282 {
4283         struct lpfc_hba *phba = vport->phba;
4284         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4285         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4286         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4287         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4288         int datadir = scsi_cmnd->sc_data_direction;
4289         char tag[2];
4290         uint8_t *ptr;
4291         bool sli4;
4292         uint32_t fcpdl;
4293
4294         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4295                 return;
4296
4297         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4298         /* clear task management bits */
4299         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4300
4301         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4302                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4303
4304         ptr = &fcp_cmnd->fcpCdb[0];
4305         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4306         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4307                 ptr += scsi_cmnd->cmd_len;
4308                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4309         }
4310
4311         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
4312                 switch (tag[0]) {
4313                 case HEAD_OF_QUEUE_TAG:
4314                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
4315                         break;
4316                 case ORDERED_QUEUE_TAG:
4317                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
4318                         break;
4319                 default:
4320                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4321                         break;
4322                 }
4323         } else
4324                 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4325
4326         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4327         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4328
4329         /*
4330          * There are three possibilities here - use scatter-gather segment, use
4331          * the single mapping, or neither.  Start the lpfc command prep by
4332          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4333          * data bde entry.
4334          */
4335         if (scsi_sg_count(scsi_cmnd)) {
4336                 if (datadir == DMA_TO_DEVICE) {
4337                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4338                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4339                         if (vport->cfg_first_burst_size &&
4340                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4341                                 fcpdl = scsi_bufflen(scsi_cmnd);
4342                                 if (fcpdl < vport->cfg_first_burst_size)
4343                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4344                                 else
4345                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4346                                                 vport->cfg_first_burst_size;
4347                         }
4348                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4349                         phba->fc4OutputRequests++;
4350                 } else {
4351                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4352                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4353                         fcp_cmnd->fcpCntl3 = READ_DATA;
4354                         phba->fc4InputRequests++;
4355                 }
4356         } else {
4357                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4358                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4359                 iocb_cmd->ulpPU = 0;
4360                 fcp_cmnd->fcpCntl3 = 0;
4361                 phba->fc4ControlRequests++;
4362         }
4363         if (phba->sli_rev == 3 &&
4364             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4365                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4366         /*
4367          * Finish initializing those IOCB fields that are independent
4368          * of the scsi_cmnd request_buffer
4369          */
4370         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4371         if (sli4)
4372                 piocbq->iocb.ulpContext =
4373                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4374         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4375                 piocbq->iocb.ulpFCP2Rcvy = 1;
4376         else
4377                 piocbq->iocb.ulpFCP2Rcvy = 0;
4378
4379         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4380         piocbq->context1  = lpfc_cmd;
4381         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4382         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4383         piocbq->vport = vport;
4384 }
4385
4386 /**
4387  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4388  * @vport: The virtual port for which this call is being executed.
4389  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4390  * @lun: Logical unit number.
4391  * @task_mgmt_cmd: SCSI task management command.
4392  *
4393  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4394  * for device with SLI-3 interface spec.
4395  *
4396  * Return codes:
4397  *   0 - Error
4398  *   1 - Success
4399  **/
4400 static int
4401 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4402                              struct lpfc_scsi_buf *lpfc_cmd,
4403                              uint64_t lun,
4404                              uint8_t task_mgmt_cmd)
4405 {
4406         struct lpfc_iocbq *piocbq;
4407         IOCB_t *piocb;
4408         struct fcp_cmnd *fcp_cmnd;
4409         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4410         struct lpfc_nodelist *ndlp = rdata->pnode;
4411
4412         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4413             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4414                 return 0;
4415
4416         piocbq = &(lpfc_cmd->cur_iocbq);
4417         piocbq->vport = vport;
4418
4419         piocb = &piocbq->iocb;
4420
4421         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4422         /* Clear out any old data in the FCP command area */
4423         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4424         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4425         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4426         if (vport->phba->sli_rev == 3 &&
4427             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4428                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4429         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4430         piocb->ulpContext = ndlp->nlp_rpi;
4431         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4432                 piocb->ulpContext =
4433                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4434         }
4435         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4436         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4437         piocb->ulpPU = 0;
4438         piocb->un.fcpi.fcpi_parm = 0;
4439
4440         /* ulpTimeout is only one byte */
4441         if (lpfc_cmd->timeout > 0xff) {
4442                 /*
4443                  * Do not timeout the command at the firmware level.
4444                  * The driver will provide the timeout mechanism.
4445                  */
4446                 piocb->ulpTimeout = 0;
4447         } else
4448                 piocb->ulpTimeout = lpfc_cmd->timeout;
4449
4450         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4451                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4452
4453         return 1;
4454 }
4455
4456 /**
4457  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4458  * @phba: The hba struct for which this call is being executed.
4459  * @dev_grp: The HBA PCI-Device group number.
4460  *
4461  * This routine sets up the SCSI interface API function jump table in @phba
4462  * struct.
4463  * Returns: 0 - success, -ENODEV - failure.
4464  **/
4465 int
4466 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4467 {
4468
4469         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4470         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4471
4472         switch (dev_grp) {
4473         case LPFC_PCI_DEV_LP:
4474                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4475                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4476                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4477                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4478                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4479                 break;
4480         case LPFC_PCI_DEV_OC:
4481                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4482                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4483                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4484                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4485                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4486                 break;
4487         default:
4488                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4489                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4490                                 dev_grp);
4491                 return -ENODEV;
4492                 break;
4493         }
4494         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4495         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4496         return 0;
4497 }
4498
4499 /**
4500  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4501  * @phba: The Hba for which this call is being executed.
4502  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4503  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4504  *
4505  * This routine is IOCB completion routine for device reset and target reset
4506  * routine. This routine release scsi buffer associated with lpfc_cmd.
4507  **/
4508 static void
4509 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4510                         struct lpfc_iocbq *cmdiocbq,
4511                         struct lpfc_iocbq *rspiocbq)
4512 {
4513         struct lpfc_scsi_buf *lpfc_cmd =
4514                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4515         if (lpfc_cmd)
4516                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4517         return;
4518 }
4519
4520 /**
4521  * lpfc_info - Info entry point of scsi_host_template data structure
4522  * @host: The scsi host for which this call is being executed.
4523  *
4524  * This routine provides module information about hba.
4525  *
4526  * Reutrn code:
4527  *   Pointer to char - Success.
4528  **/
4529 const char *
4530 lpfc_info(struct Scsi_Host *host)
4531 {
4532         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4533         struct lpfc_hba   *phba = vport->phba;
4534         int len, link_speed = 0;
4535         static char  lpfcinfobuf[384];
4536
4537         memset(lpfcinfobuf,0,384);
4538         if (phba && phba->pcidev){
4539                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4540                 len = strlen(lpfcinfobuf);
4541                 snprintf(lpfcinfobuf + len,
4542                         384-len,
4543                         " on PCI bus %02x device %02x irq %d",
4544                         phba->pcidev->bus->number,
4545                         phba->pcidev->devfn,
4546                         phba->pcidev->irq);
4547                 len = strlen(lpfcinfobuf);
4548                 if (phba->Port[0]) {
4549                         snprintf(lpfcinfobuf + len,
4550                                  384-len,
4551                                  " port %s",
4552                                  phba->Port);
4553                 }
4554                 len = strlen(lpfcinfobuf);
4555                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4556                         link_speed = lpfc_sli_port_speed_get(phba);
4557                 } else {
4558                         if (phba->sli4_hba.link_state.logical_speed)
4559                                 link_speed =
4560                                       phba->sli4_hba.link_state.logical_speed;
4561                         else
4562                                 link_speed = phba->sli4_hba.link_state.speed;
4563                 }
4564                 if (link_speed != 0)
4565                         snprintf(lpfcinfobuf + len, 384-len,
4566                                  " Logical Link Speed: %d Mbps", link_speed);
4567         }
4568         return lpfcinfobuf;
4569 }
4570
4571 /**
4572  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4573  * @phba: The Hba for which this call is being executed.
4574  *
4575  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4576  * The default value of cfg_poll_tmo is 10 milliseconds.
4577  **/
4578 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4579 {
4580         unsigned long  poll_tmo_expires =
4581                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4582
4583         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4584                 mod_timer(&phba->fcp_poll_timer,
4585                           poll_tmo_expires);
4586 }
4587
4588 /**
4589  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4590  * @phba: The Hba for which this call is being executed.
4591  *
4592  * This routine starts the fcp_poll_timer of @phba.
4593  **/
4594 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4595 {
4596         lpfc_poll_rearm_timer(phba);
4597 }
4598
4599 /**
4600  * lpfc_poll_timeout - Restart polling timer
4601  * @ptr: Map to lpfc_hba data structure pointer.
4602  *
4603  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4604  * and FCP Ring interrupt is disable.
4605  **/
4606
4607 void lpfc_poll_timeout(unsigned long ptr)
4608 {
4609         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4610
4611         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4612                 lpfc_sli_handle_fast_ring_event(phba,
4613                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4614
4615                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4616                         lpfc_poll_rearm_timer(phba);
4617         }
4618 }
4619
4620 /**
4621  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4622  * @cmnd: Pointer to scsi_cmnd data structure.
4623  * @done: Pointer to done routine.
4624  *
4625  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4626  * This routine prepares an IOCB from scsi command and provides to firmware.
4627  * The @done callback is invoked after driver finished processing the command.
4628  *
4629  * Return value :
4630  *   0 - Success
4631  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4632  **/
4633 static int
4634 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4635 {
4636         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4637         struct lpfc_hba   *phba = vport->phba;
4638         struct lpfc_rport_data *rdata;
4639         struct lpfc_nodelist *ndlp;
4640         struct lpfc_scsi_buf *lpfc_cmd;
4641         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4642         int err;
4643
4644         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4645         err = fc_remote_port_chkready(rport);
4646         if (err) {
4647                 cmnd->result = err;
4648                 goto out_fail_command;
4649         }
4650         ndlp = rdata->pnode;
4651
4652         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4653                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4654
4655                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4656                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4657                                 " op:%02x str=%s without registering for"
4658                                 " BlockGuard - Rejecting command\n",
4659                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4660                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4661                 goto out_fail_command;
4662         }
4663
4664         /*
4665          * Catch race where our node has transitioned, but the
4666          * transport is still transitioning.
4667          */
4668         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4669                 goto out_tgt_busy;
4670         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4671                 goto out_tgt_busy;
4672
4673         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4674         if (lpfc_cmd == NULL) {
4675                 lpfc_rampdown_queue_depth(phba);
4676
4677                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4678                                  "0707 driver's buffer pool is empty, "
4679                                  "IO busied\n");
4680                 goto out_host_busy;
4681         }
4682
4683         /*
4684          * Store the midlayer's command structure for the completion phase
4685          * and complete the command initialization.
4686          */
4687         lpfc_cmd->pCmd  = cmnd;
4688         lpfc_cmd->rdata = rdata;
4689         lpfc_cmd->timeout = 0;
4690         lpfc_cmd->start_time = jiffies;
4691         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4692
4693         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4694                 if (vport->phba->cfg_enable_bg) {
4695                         lpfc_printf_vlog(vport,
4696                                          KERN_INFO, LOG_SCSI_CMD,
4697                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4698                                          "sector x%llx cnt %u pt %x\n",
4699                                          dif_op_str[scsi_get_prot_op(cmnd)],
4700                                          cmnd->cmnd[0],
4701                                          (unsigned long long)scsi_get_lba(cmnd),
4702                                          blk_rq_sectors(cmnd->request),
4703                                          (cmnd->cmnd[1]>>5));
4704                 }
4705                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4706         } else {
4707                 if (vport->phba->cfg_enable_bg) {
4708                         lpfc_printf_vlog(vport,
4709                                          KERN_INFO, LOG_SCSI_CMD,
4710                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4711                                          "x%x sector x%llx cnt %u pt %x\n",
4712                                          cmnd->cmnd[0],
4713                                          (unsigned long long)scsi_get_lba(cmnd),
4714                                          blk_rq_sectors(cmnd->request),
4715                                          (cmnd->cmnd[1]>>5));
4716                 }
4717                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4718         }
4719
4720         if (err)
4721                 goto out_host_busy_free_buf;
4722
4723         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4724
4725         atomic_inc(&ndlp->cmd_pending);
4726         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4727                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4728         if (err) {
4729                 atomic_dec(&ndlp->cmd_pending);
4730                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4731                                  "3376 FCP could not issue IOCB err %x"
4732                                  "FCP cmd x%x <%d/%llu> "
4733                                  "sid: x%x did: x%x oxid: x%x "
4734                                  "Data: x%x x%x x%x x%x\n",
4735                                  err, cmnd->cmnd[0],
4736                                  cmnd->device ? cmnd->device->id : 0xffff,
4737                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4738                                  vport->fc_myDID, ndlp->nlp_DID,
4739                                  phba->sli_rev == LPFC_SLI_REV4 ?
4740                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4741                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4742                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4743                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4744                                  (uint32_t)
4745                                  (cmnd->request->timeout / 1000));
4746
4747
4748                 goto out_host_busy_free_buf;
4749         }
4750         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4751                 lpfc_sli_handle_fast_ring_event(phba,
4752                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4753
4754                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4755                         lpfc_poll_rearm_timer(phba);
4756         }
4757
4758         return 0;
4759
4760  out_host_busy_free_buf:
4761         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4762         lpfc_release_scsi_buf(phba, lpfc_cmd);
4763  out_host_busy:
4764         return SCSI_MLQUEUE_HOST_BUSY;
4765
4766  out_tgt_busy:
4767         return SCSI_MLQUEUE_TARGET_BUSY;
4768
4769  out_fail_command:
4770         cmnd->scsi_done(cmnd);
4771         return 0;
4772 }
4773
4774
4775 /**
4776  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4777  * @cmnd: Pointer to scsi_cmnd data structure.
4778  *
4779  * This routine aborts @cmnd pending in base driver.
4780  *
4781  * Return code :
4782  *   0x2003 - Error
4783  *   0x2002 - Success
4784  **/
4785 static int
4786 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4787 {
4788         struct Scsi_Host  *shost = cmnd->device->host;
4789         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4790         struct lpfc_hba   *phba = vport->phba;
4791         struct lpfc_iocbq *iocb;
4792         struct lpfc_iocbq *abtsiocb;
4793         struct lpfc_scsi_buf *lpfc_cmd;
4794         IOCB_t *cmd, *icmd;
4795         int ret = SUCCESS, status = 0;
4796         struct lpfc_sli_ring *pring_s4;
4797         int ring_number, ret_val;
4798         unsigned long flags, iflags;
4799         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4800
4801         status = fc_block_scsi_eh(cmnd);
4802         if (status != 0 && status != SUCCESS)
4803                 return status;
4804
4805         spin_lock_irqsave(&phba->hbalock, flags);
4806         /* driver queued commands are in process of being flushed */
4807         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4808                 spin_unlock_irqrestore(&phba->hbalock, flags);
4809                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4810                         "3168 SCSI Layer abort requested I/O has been "
4811                         "flushed by LLD.\n");
4812                 return FAILED;
4813         }
4814
4815         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4816         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4817                 spin_unlock_irqrestore(&phba->hbalock, flags);
4818                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4819                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4820                          "x%x ID %d LUN %llu\n",
4821                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4822                 return SUCCESS;
4823         }
4824
4825         iocb = &lpfc_cmd->cur_iocbq;
4826         /* the command is in process of being cancelled */
4827         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4828                 spin_unlock_irqrestore(&phba->hbalock, flags);
4829                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4830                         "3169 SCSI Layer abort requested I/O has been "
4831                         "cancelled by LLD.\n");
4832                 return FAILED;
4833         }
4834         /*
4835          * If pCmd field of the corresponding lpfc_scsi_buf structure
4836          * points to a different SCSI command, then the driver has
4837          * already completed this command, but the midlayer did not
4838          * see the completion before the eh fired. Just return SUCCESS.
4839          */
4840         if (lpfc_cmd->pCmd != cmnd) {
4841                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4842                         "3170 SCSI Layer abort requested I/O has been "
4843                         "completed by LLD.\n");
4844                 goto out_unlock;
4845         }
4846
4847         BUG_ON(iocb->context1 != lpfc_cmd);
4848
4849         /* abort issued in recovery is still in progress */
4850         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4851                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4852                          "3389 SCSI Layer I/O Abort Request is pending\n");
4853                 spin_unlock_irqrestore(&phba->hbalock, flags);
4854                 goto wait_for_cmpl;
4855         }
4856
4857         abtsiocb = __lpfc_sli_get_iocbq(phba);
4858         if (abtsiocb == NULL) {
4859                 ret = FAILED;
4860                 goto out_unlock;
4861         }
4862
4863         /* Indicate the IO is being aborted by the driver. */
4864         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4865
4866         /*
4867          * The scsi command can not be in txq and it is in flight because the
4868          * pCmd is still pointig at the SCSI command we have to abort. There
4869          * is no need to search the txcmplq. Just send an abort to the FW.
4870          */
4871
4872         cmd = &iocb->iocb;
4873         icmd = &abtsiocb->iocb;
4874         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4875         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4876         if (phba->sli_rev == LPFC_SLI_REV4)
4877                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4878         else
4879                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4880
4881         icmd->ulpLe = 1;
4882         icmd->ulpClass = cmd->ulpClass;
4883
4884         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4885         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4886         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4887         if (iocb->iocb_flag & LPFC_IO_FOF)
4888                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4889
4890         if (lpfc_is_link_up(phba))
4891                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4892         else
4893                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4894
4895         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4896         abtsiocb->vport = vport;
4897         if (phba->sli_rev == LPFC_SLI_REV4) {
4898                 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
4899                 pring_s4 = &phba->sli.ring[ring_number];
4900                 /* Note: both hbalock and ring_lock must be set here */
4901                 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4902                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4903                                                 abtsiocb, 0);
4904                 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4905         } else {
4906                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4907                                                 abtsiocb, 0);
4908         }
4909         /* no longer need the lock after this point */
4910         spin_unlock_irqrestore(&phba->hbalock, flags);
4911
4912
4913         if (ret_val == IOCB_ERROR) {
4914                 lpfc_sli_release_iocbq(phba, abtsiocb);
4915                 ret = FAILED;
4916                 goto out;
4917         }
4918
4919         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4920                 lpfc_sli_handle_fast_ring_event(phba,
4921                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4922
4923 wait_for_cmpl:
4924         lpfc_cmd->waitq = &waitq;
4925         /* Wait for abort to complete */
4926         wait_event_timeout(waitq,
4927                           (lpfc_cmd->pCmd != cmnd),
4928                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4929
4930         spin_lock_irqsave(shost->host_lock, flags);
4931         lpfc_cmd->waitq = NULL;
4932         spin_unlock_irqrestore(shost->host_lock, flags);
4933
4934         if (lpfc_cmd->pCmd == cmnd) {
4935                 ret = FAILED;
4936                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4937                                  "0748 abort handler timed out waiting "
4938                                  "for abortng I/O (xri:x%x) to complete: "
4939                                  "ret %#x, ID %d, LUN %llu\n",
4940                                  iocb->sli4_xritag, ret,
4941                                  cmnd->device->id, cmnd->device->lun);
4942         }
4943         goto out;
4944
4945 out_unlock:
4946         spin_unlock_irqrestore(&phba->hbalock, flags);
4947 out:
4948         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4949                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4950                          "LUN %llu\n", ret, cmnd->device->id,
4951                          cmnd->device->lun);
4952         return ret;
4953 }
4954
4955 static char *
4956 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4957 {
4958         switch (task_mgmt_cmd) {
4959         case FCP_ABORT_TASK_SET:
4960                 return "ABORT_TASK_SET";
4961         case FCP_CLEAR_TASK_SET:
4962                 return "FCP_CLEAR_TASK_SET";
4963         case FCP_BUS_RESET:
4964                 return "FCP_BUS_RESET";
4965         case FCP_LUN_RESET:
4966                 return "FCP_LUN_RESET";
4967         case FCP_TARGET_RESET:
4968                 return "FCP_TARGET_RESET";
4969         case FCP_CLEAR_ACA:
4970                 return "FCP_CLEAR_ACA";
4971         case FCP_TERMINATE_TASK:
4972                 return "FCP_TERMINATE_TASK";
4973         default:
4974                 return "unknown";
4975         }
4976 }
4977
4978
4979 /**
4980  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4981  * @vport: The virtual port for which this call is being executed.
4982  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4983  *
4984  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4985  *
4986  * Return code :
4987  *   0x2003 - Error
4988  *   0x2002 - Success
4989  **/
4990 static int
4991 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4992 {
4993         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4994         uint32_t rsp_info;
4995         uint32_t rsp_len;
4996         uint8_t  rsp_info_code;
4997         int ret = FAILED;
4998
4999
5000         if (fcprsp == NULL)
5001                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5002                                  "0703 fcp_rsp is missing\n");
5003         else {
5004                 rsp_info = fcprsp->rspStatus2;
5005                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
5006                 rsp_info_code = fcprsp->rspInfo3;
5007
5008
5009                 lpfc_printf_vlog(vport, KERN_INFO,
5010                                  LOG_FCP,
5011                                  "0706 fcp_rsp valid 0x%x,"
5012                                  " rsp len=%d code 0x%x\n",
5013                                  rsp_info,
5014                                  rsp_len, rsp_info_code);
5015
5016                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
5017                         switch (rsp_info_code) {
5018                         case RSP_NO_FAILURE:
5019                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5020                                                  "0715 Task Mgmt No Failure\n");
5021                                 ret = SUCCESS;
5022                                 break;
5023                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
5024                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5025                                                  "0716 Task Mgmt Target "
5026                                                 "reject\n");
5027                                 break;
5028                         case RSP_TM_NOT_COMPLETED: /* TM failed */
5029                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5030                                                  "0717 Task Mgmt Target "
5031                                                 "failed TM\n");
5032                                 break;
5033                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
5034                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5035                                                  "0718 Task Mgmt to invalid "
5036                                                 "LUN\n");
5037                                 break;
5038                         }
5039                 }
5040         }
5041         return ret;
5042 }
5043
5044
5045 /**
5046  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5047  * @vport: The virtual port for which this call is being executed.
5048  * @rdata: Pointer to remote port local data
5049  * @tgt_id: Target ID of remote device.
5050  * @lun_id: Lun number for the TMF
5051  * @task_mgmt_cmd: type of TMF to send
5052  *
5053  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5054  * a remote port.
5055  *
5056  * Return Code:
5057  *   0x2003 - Error
5058  *   0x2002 - Success.
5059  **/
5060 static int
5061 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
5062                     unsigned  tgt_id, uint64_t lun_id,
5063                     uint8_t task_mgmt_cmd)
5064 {
5065         struct lpfc_hba   *phba = vport->phba;
5066         struct lpfc_scsi_buf *lpfc_cmd;
5067         struct lpfc_iocbq *iocbq;
5068         struct lpfc_iocbq *iocbqrsp;
5069         struct lpfc_nodelist *pnode = rdata->pnode;
5070         int ret;
5071         int status;
5072
5073         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5074                 return FAILED;
5075
5076         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
5077         if (lpfc_cmd == NULL)
5078                 return FAILED;
5079         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5080         lpfc_cmd->rdata = rdata;
5081
5082         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5083                                            task_mgmt_cmd);
5084         if (!status) {
5085                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5086                 return FAILED;
5087         }
5088
5089         iocbq = &lpfc_cmd->cur_iocbq;
5090         iocbqrsp = lpfc_sli_get_iocbq(phba);
5091         if (iocbqrsp == NULL) {
5092                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5093                 return FAILED;
5094         }
5095         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5096
5097         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5098                          "0702 Issue %s to TGT %d LUN %llu "
5099                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5100                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5101                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5102                          iocbq->iocb_flag);
5103
5104         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5105                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5106         if ((status != IOCB_SUCCESS) ||
5107             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5108                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5109                          "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) "
5110                          "iocb_flag x%x\n",
5111                          lpfc_taskmgmt_name(task_mgmt_cmd),
5112                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
5113                          iocbqrsp->iocb.un.ulpWord[4],
5114                          iocbq->iocb_flag);
5115                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5116                 if (status == IOCB_SUCCESS) {
5117                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5118                                 /* Something in the FCP_RSP was invalid.
5119                                  * Check conditions */
5120                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5121                         else
5122                                 ret = FAILED;
5123                 } else if (status == IOCB_TIMEDOUT) {
5124                         ret = TIMEOUT_ERROR;
5125                 } else {
5126                         ret = FAILED;
5127                 }
5128                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
5129         } else
5130                 ret = SUCCESS;
5131
5132         lpfc_sli_release_iocbq(phba, iocbqrsp);
5133
5134         if (ret != TIMEOUT_ERROR)
5135                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5136
5137         return ret;
5138 }
5139
5140 /**
5141  * lpfc_chk_tgt_mapped -
5142  * @vport: The virtual port to check on
5143  * @cmnd: Pointer to scsi_cmnd data structure.
5144  *
5145  * This routine delays until the scsi target (aka rport) for the
5146  * command exists (is present and logged in) or we declare it non-existent.
5147  *
5148  * Return code :
5149  *  0x2003 - Error
5150  *  0x2002 - Success
5151  **/
5152 static int
5153 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5154 {
5155         struct lpfc_rport_data *rdata;
5156         struct lpfc_nodelist *pnode;
5157         unsigned long later;
5158
5159         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5160         if (!rdata) {
5161                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5162                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5163                 return FAILED;
5164         }
5165         pnode = rdata->pnode;
5166         /*
5167          * If target is not in a MAPPED state, delay until
5168          * target is rediscovered or devloss timeout expires.
5169          */
5170         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5171         while (time_after(later, jiffies)) {
5172                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5173                         return FAILED;
5174                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5175                         return SUCCESS;
5176                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5177                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5178                 if (!rdata)
5179                         return FAILED;
5180                 pnode = rdata->pnode;
5181         }
5182         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5183             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5184                 return FAILED;
5185         return SUCCESS;
5186 }
5187
5188 /**
5189  * lpfc_reset_flush_io_context -
5190  * @vport: The virtual port (scsi_host) for the flush context
5191  * @tgt_id: If aborting by Target contect - specifies the target id
5192  * @lun_id: If aborting by Lun context - specifies the lun id
5193  * @context: specifies the context level to flush at.
5194  *
5195  * After a reset condition via TMF, we need to flush orphaned i/o
5196  * contexts from the adapter. This routine aborts any contexts
5197  * outstanding, then waits for their completions. The wait is
5198  * bounded by devloss_tmo though.
5199  *
5200  * Return code :
5201  *  0x2003 - Error
5202  *  0x2002 - Success
5203  **/
5204 static int
5205 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5206                         uint64_t lun_id, lpfc_ctx_cmd context)
5207 {
5208         struct lpfc_hba   *phba = vport->phba;
5209         unsigned long later;
5210         int cnt;
5211
5212         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5213         if (cnt)
5214                 lpfc_sli_abort_taskmgmt(vport,
5215                                         &phba->sli.ring[phba->sli.fcp_ring],
5216                                         tgt_id, lun_id, context);
5217         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5218         while (time_after(later, jiffies) && cnt) {
5219                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5220                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5221         }
5222         if (cnt) {
5223                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5224                         "0724 I/O flush failure for context %s : cnt x%x\n",
5225                         ((context == LPFC_CTX_LUN) ? "LUN" :
5226                          ((context == LPFC_CTX_TGT) ? "TGT" :
5227                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5228                         cnt);
5229                 return FAILED;
5230         }
5231         return SUCCESS;
5232 }
5233
5234 /**
5235  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5236  * @cmnd: Pointer to scsi_cmnd data structure.
5237  *
5238  * This routine does a device reset by sending a LUN_RESET task management
5239  * command.
5240  *
5241  * Return code :
5242  *  0x2003 - Error
5243  *  0x2002 - Success
5244  **/
5245 static int
5246 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5247 {
5248         struct Scsi_Host  *shost = cmnd->device->host;
5249         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5250         struct lpfc_rport_data *rdata;
5251         struct lpfc_nodelist *pnode;
5252         unsigned tgt_id = cmnd->device->id;
5253         uint64_t lun_id = cmnd->device->lun;
5254         struct lpfc_scsi_event_header scsi_event;
5255         int status;
5256
5257         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5258         if (!rdata) {
5259                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5260                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
5261                 return FAILED;
5262         }
5263         pnode = rdata->pnode;
5264         status = fc_block_scsi_eh(cmnd);
5265         if (status != 0 && status != SUCCESS)
5266                 return status;
5267
5268         status = lpfc_chk_tgt_mapped(vport, cmnd);
5269         if (status == FAILED) {
5270                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5271                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5272                 return FAILED;
5273         }
5274
5275         scsi_event.event_type = FC_REG_SCSI_EVENT;
5276         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5277         scsi_event.lun = lun_id;
5278         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5279         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5280
5281         fc_host_post_vendor_event(shost, fc_get_event_number(),
5282                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5283
5284         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5285                                                 FCP_LUN_RESET);
5286
5287         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5288                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5289                          "return x%x\n", tgt_id, lun_id, status);
5290
5291         /*
5292          * We have to clean up i/o as : they may be orphaned by the TMF;
5293          * or if the TMF failed, they may be in an indeterminate state.
5294          * So, continue on.
5295          * We will report success if all the i/o aborts successfully.
5296          */
5297         if (status == SUCCESS)
5298                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5299                                                 LPFC_CTX_LUN);
5300
5301         return status;
5302 }
5303
5304 /**
5305  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5306  * @cmnd: Pointer to scsi_cmnd data structure.
5307  *
5308  * This routine does a target reset by sending a TARGET_RESET task management
5309  * command.
5310  *
5311  * Return code :
5312  *  0x2003 - Error
5313  *  0x2002 - Success
5314  **/
5315 static int
5316 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5317 {
5318         struct Scsi_Host  *shost = cmnd->device->host;
5319         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5320         struct lpfc_rport_data *rdata;
5321         struct lpfc_nodelist *pnode;
5322         unsigned tgt_id = cmnd->device->id;
5323         uint64_t lun_id = cmnd->device->lun;
5324         struct lpfc_scsi_event_header scsi_event;
5325         int status;
5326
5327         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5328         if (!rdata) {
5329                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5330                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5331                 return FAILED;
5332         }
5333         pnode = rdata->pnode;
5334         status = fc_block_scsi_eh(cmnd);
5335         if (status != 0 && status != SUCCESS)
5336                 return status;
5337
5338         status = lpfc_chk_tgt_mapped(vport, cmnd);
5339         if (status == FAILED) {
5340                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5341                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5342                 spin_lock_irq(shost->host_lock);
5343                 pnode->nlp_flag &= ~NLP_NPR_ADISC;
5344                 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5345                 spin_unlock_irq(shost->host_lock);
5346                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5347                                           LPFC_CTX_TGT);
5348                 return FAST_IO_FAIL;
5349         }
5350
5351         scsi_event.event_type = FC_REG_SCSI_EVENT;
5352         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5353         scsi_event.lun = 0;
5354         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5355         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5356
5357         fc_host_post_vendor_event(shost, fc_get_event_number(),
5358                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5359
5360         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5361                                         FCP_TARGET_RESET);
5362
5363         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5364                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5365                          "return x%x\n", tgt_id, lun_id, status);
5366
5367         /*
5368          * We have to clean up i/o as : they may be orphaned by the TMF;
5369          * or if the TMF failed, they may be in an indeterminate state.
5370          * So, continue on.
5371          * We will report success if all the i/o aborts successfully.
5372          */
5373         if (status == SUCCESS)
5374                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5375                                           LPFC_CTX_TGT);
5376         return status;
5377 }
5378
5379 /**
5380  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5381  * @cmnd: Pointer to scsi_cmnd data structure.
5382  *
5383  * This routine does target reset to all targets on @cmnd->device->host.
5384  * This emulates Parallel SCSI Bus Reset Semantics.
5385  *
5386  * Return code :
5387  *  0x2003 - Error
5388  *  0x2002 - Success
5389  **/
5390 static int
5391 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5392 {
5393         struct Scsi_Host  *shost = cmnd->device->host;
5394         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5395         struct lpfc_nodelist *ndlp = NULL;
5396         struct lpfc_scsi_event_header scsi_event;
5397         int match;
5398         int ret = SUCCESS, status, i;
5399
5400         scsi_event.event_type = FC_REG_SCSI_EVENT;
5401         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5402         scsi_event.lun = 0;
5403         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5404         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5405
5406         fc_host_post_vendor_event(shost, fc_get_event_number(),
5407                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5408
5409         status = fc_block_scsi_eh(cmnd);
5410         if (status != 0 && status != SUCCESS)
5411                 return status;
5412
5413         /*
5414          * Since the driver manages a single bus device, reset all
5415          * targets known to the driver.  Should any target reset
5416          * fail, this routine returns failure to the midlayer.
5417          */
5418         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5419                 /* Search for mapped node by target ID */
5420                 match = 0;
5421                 spin_lock_irq(shost->host_lock);
5422                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5423                         if (!NLP_CHK_NODE_ACT(ndlp))
5424                                 continue;
5425                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5426                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5427                                 continue;
5428                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5429                             ndlp->nlp_sid == i &&
5430                             ndlp->rport) {
5431                                 match = 1;
5432                                 break;
5433                         }
5434                 }
5435                 spin_unlock_irq(shost->host_lock);
5436                 if (!match)
5437                         continue;
5438
5439                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5440                                         i, 0, FCP_TARGET_RESET);
5441
5442                 if (status != SUCCESS) {
5443                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5444                                          "0700 Bus Reset on target %d failed\n",
5445                                          i);
5446                         ret = FAILED;
5447                 }
5448         }
5449         /*
5450          * We have to clean up i/o as : they may be orphaned by the TMFs
5451          * above; or if any of the TMFs failed, they may be in an
5452          * indeterminate state.
5453          * We will report success if all the i/o aborts successfully.
5454          */
5455
5456         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5457         if (status != SUCCESS)
5458                 ret = FAILED;
5459
5460         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5461                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5462         return ret;
5463 }
5464
5465 /**
5466  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5467  * @cmnd: Pointer to scsi_cmnd data structure.
5468  *
5469  * This routine does host reset to the adaptor port. It brings the HBA
5470  * offline, performs a board restart, and then brings the board back online.
5471  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5472  * reject all outstanding SCSI commands to the host and error returned
5473  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5474  * of error handling, it will only return error if resetting of the adapter
5475  * is not successful; in all other cases, will return success.
5476  *
5477  * Return code :
5478  *  0x2003 - Error
5479  *  0x2002 - Success
5480  **/
5481 static int
5482 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5483 {
5484         struct Scsi_Host *shost = cmnd->device->host;
5485         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5486         struct lpfc_hba *phba = vport->phba;
5487         int rc, ret = SUCCESS;
5488
5489         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5490                          "3172 SCSI layer issued Host Reset Data:\n");
5491
5492         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5493         lpfc_offline(phba);
5494         rc = lpfc_sli_brdrestart(phba);
5495         if (rc)
5496                 ret = FAILED;
5497         rc = lpfc_online(phba);
5498         if (rc)
5499                 ret = FAILED;
5500         lpfc_unblock_mgmt_io(phba);
5501
5502         if (ret == FAILED) {
5503                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5504                                  "3323 Failed host reset, bring it offline\n");
5505                 lpfc_sli4_offline_eratt(phba);
5506         }
5507         return ret;
5508 }
5509
5510 /**
5511  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5512  * @sdev: Pointer to scsi_device.
5513  *
5514  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5515  * globally available list of scsi buffers. This routine also makes sure scsi
5516  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5517  * of scsi buffer exists for the lifetime of the driver.
5518  *
5519  * Return codes:
5520  *   non-0 - Error
5521  *   0 - Success
5522  **/
5523 static int
5524 lpfc_slave_alloc(struct scsi_device *sdev)
5525 {
5526         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5527         struct lpfc_hba   *phba = vport->phba;
5528         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5529         uint32_t total = 0;
5530         uint32_t num_to_alloc = 0;
5531         int num_allocated = 0;
5532         uint32_t sdev_cnt;
5533         struct lpfc_device_data *device_data;
5534         unsigned long flags;
5535         struct lpfc_name target_wwpn;
5536
5537         if (!rport || fc_remote_port_chkready(rport))
5538                 return -ENXIO;
5539
5540         if (phba->cfg_fof) {
5541
5542                 /*
5543                  * Check to see if the device data structure for the lun
5544                  * exists.  If not, create one.
5545                  */
5546
5547                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5548                 spin_lock_irqsave(&phba->devicelock, flags);
5549                 device_data = __lpfc_get_device_data(phba,
5550                                                      &phba->luns,
5551                                                      &vport->fc_portname,
5552                                                      &target_wwpn,
5553                                                      sdev->lun);
5554                 if (!device_data) {
5555                         spin_unlock_irqrestore(&phba->devicelock, flags);
5556                         device_data = lpfc_create_device_data(phba,
5557                                                         &vport->fc_portname,
5558                                                         &target_wwpn,
5559                                                         sdev->lun, true);
5560                         if (!device_data)
5561                                 return -ENOMEM;
5562                         spin_lock_irqsave(&phba->devicelock, flags);
5563                         list_add_tail(&device_data->listentry, &phba->luns);
5564                 }
5565                 device_data->rport_data = rport->dd_data;
5566                 device_data->available = true;
5567                 spin_unlock_irqrestore(&phba->devicelock, flags);
5568                 sdev->hostdata = device_data;
5569         } else {
5570                 sdev->hostdata = rport->dd_data;
5571         }
5572         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5573
5574         /*
5575          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5576          * available list of scsi buffers.  Don't allocate more than the
5577          * HBA limit conveyed to the midlayer via the host structure.  The
5578          * formula accounts for the lun_queue_depth + error handlers + 1
5579          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5580          */
5581         total = phba->total_scsi_bufs;
5582         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5583
5584         /* If allocated buffers are enough do nothing */
5585         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5586                 return 0;
5587
5588         /* Allow some exchanges to be available always to complete discovery */
5589         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5590                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5591                                  "0704 At limitation of %d preallocated "
5592                                  "command buffers\n", total);
5593                 return 0;
5594         /* Allow some exchanges to be available always to complete discovery */
5595         } else if (total + num_to_alloc >
5596                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5597                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5598                                  "0705 Allocation request of %d "
5599                                  "command buffers will exceed max of %d.  "
5600                                  "Reducing allocation request to %d.\n",
5601                                  num_to_alloc, phba->cfg_hba_queue_depth,
5602                                  (phba->cfg_hba_queue_depth - total));
5603                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5604         }
5605         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5606         if (num_to_alloc != num_allocated) {
5607                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5608                                          "0708 Allocation request of %d "
5609                                          "command buffers did not succeed.  "
5610                                          "Allocated %d buffers.\n",
5611                                          num_to_alloc, num_allocated);
5612         }
5613         if (num_allocated > 0)
5614                 phba->total_scsi_bufs += num_allocated;
5615         return 0;
5616 }
5617
5618 /**
5619  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5620  * @sdev: Pointer to scsi_device.
5621  *
5622  * This routine configures following items
5623  *   - Tag command queuing support for @sdev if supported.
5624  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5625  *
5626  * Return codes:
5627  *   0 - Success
5628  **/
5629 static int
5630 lpfc_slave_configure(struct scsi_device *sdev)
5631 {
5632         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5633         struct lpfc_hba   *phba = vport->phba;
5634
5635         if (sdev->tagged_supported)
5636                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
5637         else
5638                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
5639
5640         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5641                 lpfc_sli_handle_fast_ring_event(phba,
5642                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5643                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5644                         lpfc_poll_rearm_timer(phba);
5645         }
5646
5647         return 0;
5648 }
5649
5650 /**
5651  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5652  * @sdev: Pointer to scsi_device.
5653  *
5654  * This routine sets @sdev hostatdata filed to null.
5655  **/
5656 static void
5657 lpfc_slave_destroy(struct scsi_device *sdev)
5658 {
5659         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5660         struct lpfc_hba   *phba = vport->phba;
5661         unsigned long flags;
5662         struct lpfc_device_data *device_data = sdev->hostdata;
5663
5664         atomic_dec(&phba->sdev_cnt);
5665         if ((phba->cfg_fof) && (device_data)) {
5666                 spin_lock_irqsave(&phba->devicelock, flags);
5667                 device_data->available = false;
5668                 if (!device_data->oas_enabled)
5669                         lpfc_delete_device_data(phba, device_data);
5670                 spin_unlock_irqrestore(&phba->devicelock, flags);
5671         }
5672         sdev->hostdata = NULL;
5673         return;
5674 }
5675
5676 /**
5677  * lpfc_create_device_data - creates and initializes device data structure for OAS
5678  * @pha: Pointer to host bus adapter structure.
5679  * @vport_wwpn: Pointer to vport's wwpn information
5680  * @target_wwpn: Pointer to target's wwpn information
5681  * @lun: Lun on target
5682  * @atomic_create: Flag to indicate if memory should be allocated using the
5683  *                GFP_ATOMIC flag or not.
5684  *
5685  * This routine creates a device data structure which will contain identifying
5686  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5687  * whether or not the corresponding lun is available by the system,
5688  * and pointer to the rport data.
5689  *
5690  * Return codes:
5691  *   NULL - Error
5692  *   Pointer to lpfc_device_data - Success
5693  **/
5694 struct lpfc_device_data*
5695 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5696                         struct lpfc_name *target_wwpn, uint64_t lun,
5697                         bool atomic_create)
5698 {
5699
5700         struct lpfc_device_data *lun_info;
5701         int memory_flags;
5702
5703         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5704             !(phba->cfg_fof))
5705                 return NULL;
5706
5707         /* Attempt to create the device data to contain lun info */
5708
5709         if (atomic_create)
5710                 memory_flags = GFP_ATOMIC;
5711         else
5712                 memory_flags = GFP_KERNEL;
5713         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5714         if (!lun_info)
5715                 return NULL;
5716         INIT_LIST_HEAD(&lun_info->listentry);
5717         lun_info->rport_data  = NULL;
5718         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5719                sizeof(struct lpfc_name));
5720         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5721                sizeof(struct lpfc_name));
5722         lun_info->device_id.lun = lun;
5723         lun_info->oas_enabled = false;
5724         lun_info->available = false;
5725         return lun_info;
5726 }
5727
5728 /**
5729  * lpfc_delete_device_data - frees a device data structure for OAS
5730  * @pha: Pointer to host bus adapter structure.
5731  * @lun_info: Pointer to device data structure to free.
5732  *
5733  * This routine frees the previously allocated device data structure passed.
5734  *
5735  **/
5736 void
5737 lpfc_delete_device_data(struct lpfc_hba *phba,
5738                         struct lpfc_device_data *lun_info)
5739 {
5740
5741         if (unlikely(!phba) || !lun_info  ||
5742             !(phba->cfg_fof))
5743                 return;
5744
5745         if (!list_empty(&lun_info->listentry))
5746                 list_del(&lun_info->listentry);
5747         mempool_free(lun_info, phba->device_data_mem_pool);
5748         return;
5749 }
5750
5751 /**
5752  * __lpfc_get_device_data - returns the device data for the specified lun
5753  * @pha: Pointer to host bus adapter structure.
5754  * @list: Point to list to search.
5755  * @vport_wwpn: Pointer to vport's wwpn information
5756  * @target_wwpn: Pointer to target's wwpn information
5757  * @lun: Lun on target
5758  *
5759  * This routine searches the list passed for the specified lun's device data.
5760  * This function does not hold locks, it is the responsibility of the caller
5761  * to ensure the proper lock is held before calling the function.
5762  *
5763  * Return codes:
5764  *   NULL - Error
5765  *   Pointer to lpfc_device_data - Success
5766  **/
5767 struct lpfc_device_data*
5768 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5769                        struct lpfc_name *vport_wwpn,
5770                        struct lpfc_name *target_wwpn, uint64_t lun)
5771 {
5772
5773         struct lpfc_device_data *lun_info;
5774
5775         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5776             !phba->cfg_fof)
5777                 return NULL;
5778
5779         /* Check to see if the lun is already enabled for OAS. */
5780
5781         list_for_each_entry(lun_info, list, listentry) {
5782                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5783                             sizeof(struct lpfc_name)) == 0) &&
5784                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5785                             sizeof(struct lpfc_name)) == 0) &&
5786                     (lun_info->device_id.lun == lun))
5787                         return lun_info;
5788         }
5789
5790         return NULL;
5791 }
5792
5793 /**
5794  * lpfc_find_next_oas_lun - searches for the next oas lun
5795  * @pha: Pointer to host bus adapter structure.
5796  * @vport_wwpn: Pointer to vport's wwpn information
5797  * @target_wwpn: Pointer to target's wwpn information
5798  * @starting_lun: Pointer to the lun to start searching for
5799  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5800  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5801  * @found_lun: Pointer to the found lun.
5802  * @found_lun_status: Pointer to status of the found lun.
5803  *
5804  * This routine searches the luns list for the specified lun
5805  * or the first lun for the vport/target.  If the vport wwpn contains
5806  * a zero value then a specific vport is not specified. In this case
5807  * any vport which contains the lun will be considered a match.  If the
5808  * target wwpn contains a zero value then a specific target is not specified.
5809  * In this case any target which contains the lun will be considered a
5810  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5811  * are returned.  The function will also return the next lun if available.
5812  * If the next lun is not found, starting_lun parameter will be set to
5813  * NO_MORE_OAS_LUN.
5814  *
5815  * Return codes:
5816  *   non-0 - Error
5817  *   0 - Success
5818  **/
5819 bool
5820 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5821                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5822                        struct lpfc_name *found_vport_wwpn,
5823                        struct lpfc_name *found_target_wwpn,
5824                        uint64_t *found_lun,
5825                        uint32_t *found_lun_status)
5826 {
5827
5828         unsigned long flags;
5829         struct lpfc_device_data *lun_info;
5830         struct lpfc_device_id *device_id;
5831         uint64_t lun;
5832         bool found = false;
5833
5834         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5835             !starting_lun || !found_vport_wwpn ||
5836             !found_target_wwpn || !found_lun || !found_lun_status ||
5837             (*starting_lun == NO_MORE_OAS_LUN) ||
5838             !phba->cfg_fof)
5839                 return false;
5840
5841         lun = *starting_lun;
5842         *found_lun = NO_MORE_OAS_LUN;
5843         *starting_lun = NO_MORE_OAS_LUN;
5844
5845         /* Search for lun or the lun closet in value */
5846
5847         spin_lock_irqsave(&phba->devicelock, flags);
5848         list_for_each_entry(lun_info, &phba->luns, listentry) {
5849                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5850                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5851                             sizeof(struct lpfc_name)) == 0)) &&
5852                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5853                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5854                             sizeof(struct lpfc_name)) == 0)) &&
5855                     (lun_info->oas_enabled)) {
5856                         device_id = &lun_info->device_id;
5857                         if ((!found) &&
5858                             ((lun == FIND_FIRST_OAS_LUN) ||
5859                              (device_id->lun == lun))) {
5860                                 *found_lun = device_id->lun;
5861                                 memcpy(found_vport_wwpn,
5862                                        &device_id->vport_wwpn,
5863                                        sizeof(struct lpfc_name));
5864                                 memcpy(found_target_wwpn,
5865                                        &device_id->target_wwpn,
5866                                        sizeof(struct lpfc_name));
5867                                 if (lun_info->available)
5868                                         *found_lun_status =
5869                                                 OAS_LUN_STATUS_EXISTS;
5870                                 else
5871                                         *found_lun_status = 0;
5872                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5873                                         memset(vport_wwpn, 0x0,
5874                                                sizeof(struct lpfc_name));
5875                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5876                                         memset(target_wwpn, 0x0,
5877                                                sizeof(struct lpfc_name));
5878                                 found = true;
5879                         } else if (found) {
5880                                 *starting_lun = device_id->lun;
5881                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5882                                        sizeof(struct lpfc_name));
5883                                 memcpy(target_wwpn, &device_id->target_wwpn,
5884                                        sizeof(struct lpfc_name));
5885                                 break;
5886                         }
5887                 }
5888         }
5889         spin_unlock_irqrestore(&phba->devicelock, flags);
5890         return found;
5891 }
5892
5893 /**
5894  * lpfc_enable_oas_lun - enables a lun for OAS operations
5895  * @pha: Pointer to host bus adapter structure.
5896  * @vport_wwpn: Pointer to vport's wwpn information
5897  * @target_wwpn: Pointer to target's wwpn information
5898  * @lun: Lun
5899  *
5900  * This routine enables a lun for oas operations.  The routines does so by
5901  * doing the following :
5902  *
5903  *   1) Checks to see if the device data for the lun has been created.
5904  *   2) If found, sets the OAS enabled flag if not set and returns.
5905  *   3) Otherwise, creates a device data structure.
5906  *   4) If successfully created, indicates the device data is for an OAS lun,
5907  *   indicates the lun is not available and add to the list of luns.
5908  *
5909  * Return codes:
5910  *   false - Error
5911  *   true - Success
5912  **/
5913 bool
5914 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5915                     struct lpfc_name *target_wwpn, uint64_t lun)
5916 {
5917
5918         struct lpfc_device_data *lun_info;
5919         unsigned long flags;
5920
5921         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5922             !phba->cfg_fof)
5923                 return false;
5924
5925         spin_lock_irqsave(&phba->devicelock, flags);
5926
5927         /* Check to see if the device data for the lun has been created */
5928         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5929                                           target_wwpn, lun);
5930         if (lun_info) {
5931                 if (!lun_info->oas_enabled)
5932                         lun_info->oas_enabled = true;
5933                 spin_unlock_irqrestore(&phba->devicelock, flags);
5934                 return true;
5935         }
5936
5937         /* Create an lun info structure and add to list of luns */
5938         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5939                                            false);
5940         if (lun_info) {
5941                 lun_info->oas_enabled = true;
5942                 lun_info->available = false;
5943                 list_add_tail(&lun_info->listentry, &phba->luns);
5944                 spin_unlock_irqrestore(&phba->devicelock, flags);
5945                 return true;
5946         }
5947         spin_unlock_irqrestore(&phba->devicelock, flags);
5948         return false;
5949 }
5950
5951 /**
5952  * lpfc_disable_oas_lun - disables a lun for OAS operations
5953  * @pha: Pointer to host bus adapter structure.
5954  * @vport_wwpn: Pointer to vport's wwpn information
5955  * @target_wwpn: Pointer to target's wwpn information
5956  * @lun: Lun
5957  *
5958  * This routine disables a lun for oas operations.  The routines does so by
5959  * doing the following :
5960  *
5961  *   1) Checks to see if the device data for the lun is created.
5962  *   2) If present, clears the flag indicating this lun is for OAS.
5963  *   3) If the lun is not available by the system, the device data is
5964  *   freed.
5965  *
5966  * Return codes:
5967  *   false - Error
5968  *   true - Success
5969  **/
5970 bool
5971 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5972                      struct lpfc_name *target_wwpn, uint64_t lun)
5973 {
5974
5975         struct lpfc_device_data *lun_info;
5976         unsigned long flags;
5977
5978         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5979             !phba->cfg_fof)
5980                 return false;
5981
5982         spin_lock_irqsave(&phba->devicelock, flags);
5983
5984         /* Check to see if the lun is available. */
5985         lun_info = __lpfc_get_device_data(phba,
5986                                           &phba->luns, vport_wwpn,
5987                                           target_wwpn, lun);
5988         if (lun_info) {
5989                 lun_info->oas_enabled = false;
5990                 if (!lun_info->available)
5991                         lpfc_delete_device_data(phba, lun_info);
5992                 spin_unlock_irqrestore(&phba->devicelock, flags);
5993                 return true;
5994         }
5995
5996         spin_unlock_irqrestore(&phba->devicelock, flags);
5997         return false;
5998 }
5999
6000 struct scsi_host_template lpfc_template = {
6001         .module                 = THIS_MODULE,
6002         .name                   = LPFC_DRIVER_NAME,
6003         .info                   = lpfc_info,
6004         .queuecommand           = lpfc_queuecommand,
6005         .eh_abort_handler       = lpfc_abort_handler,
6006         .eh_device_reset_handler = lpfc_device_reset_handler,
6007         .eh_target_reset_handler = lpfc_target_reset_handler,
6008         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6009         .eh_host_reset_handler  = lpfc_host_reset_handler,
6010         .slave_alloc            = lpfc_slave_alloc,
6011         .slave_configure        = lpfc_slave_configure,
6012         .slave_destroy          = lpfc_slave_destroy,
6013         .scan_finished          = lpfc_scan_finished,
6014         .this_id                = -1,
6015         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6016         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6017         .use_clustering         = ENABLE_CLUSTERING,
6018         .shost_attrs            = lpfc_hba_attrs,
6019         .max_sectors            = 0xFFFF,
6020         .vendor_id              = LPFC_NL_VENDOR_ID,
6021         .change_queue_depth     = lpfc_change_queue_depth,
6022         .change_queue_type      = lpfc_change_queue_type,
6023 };
6024
6025 struct scsi_host_template lpfc_vport_template = {
6026         .module                 = THIS_MODULE,
6027         .name                   = LPFC_DRIVER_NAME,
6028         .info                   = lpfc_info,
6029         .queuecommand           = lpfc_queuecommand,
6030         .eh_abort_handler       = lpfc_abort_handler,
6031         .eh_device_reset_handler = lpfc_device_reset_handler,
6032         .eh_target_reset_handler = lpfc_target_reset_handler,
6033         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6034         .slave_alloc            = lpfc_slave_alloc,
6035         .slave_configure        = lpfc_slave_configure,
6036         .slave_destroy          = lpfc_slave_destroy,
6037         .scan_finished          = lpfc_scan_finished,
6038         .this_id                = -1,
6039         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6040         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6041         .use_clustering         = ENABLE_CLUSTERING,
6042         .shost_attrs            = lpfc_vport_attrs,
6043         .max_sectors            = 0xFFFF,
6044         .change_queue_depth     = lpfc_change_queue_depth,
6045         .change_queue_type      = lpfc_change_queue_type,
6046 };