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) 2004-2011 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21 #include <linux/pci.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/delay.h>
  25 #include <asm/unaligned.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_eh.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_tcq.h>
  32 #include <scsi/scsi_transport_fc.h>
  33
  34 #include "lpfc_version.h"
  35 #include "lpfc_hw4.h"
  36 #include "lpfc_hw.h"
  37 #include "lpfc_sli.h"
  38 #include "lpfc_sli4.h"
  39 #include "lpfc_nl.h"
  40 #include "lpfc_disc.h"
  41 #include "lpfc_scsi.h"
  42 #include "lpfc.h"
  43 #include "lpfc_logmsg.h"
  44 #include "lpfc_crtn.h"
  45 #include "lpfc_vport.h"
  46
  47 #define LPFC_RESET_WAIT  2
  48 #define LPFC_ABORT_WAIT  2
  49
  50 int _dump_buf_done;
  51
  52 static char *dif_op_str[] = {
  53         "SCSI_PROT_NORMAL",
  54         "SCSI_PROT_READ_INSERT",
  55         "SCSI_PROT_WRITE_STRIP",
  56         "SCSI_PROT_READ_STRIP",
  57         "SCSI_PROT_WRITE_INSERT",
  58         "SCSI_PROT_READ_PASS",
  59         "SCSI_PROT_WRITE_PASS",
  60 };
  61 static void
  62 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  63 static void
  64 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  65
  66 static void
  67 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  68 {
  69         void *src, *dst;
  70         struct scatterlist *sgde = scsi_sglist(cmnd);
  71
  72         if (!_dump_buf_data) {
  73                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  74                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  75                                 __func__);
  76                 return;
  77         }
  78
  79
  80         if (!sgde) {
  81                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  82                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
  83                 return;
  84         }
  85
  86         dst = (void *) _dump_buf_data;
  87         while (sgde) {
  88                 src = sg_virt(sgde);
  89                 memcpy(dst, src, sgde->length);
  90                 dst += sgde->length;
  91                 sgde = sg_next(sgde);
  92         }
  93 }
  94
  95 static void
  96 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  97 {
  98         void *src, *dst;
  99         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 100
 101         if (!_dump_buf_dif) {
 102                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 103                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 104                                 __func__);
 105                 return;
 106         }
 107
 108         if (!sgde) {
 109                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 110                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 111                 return;
 112         }
 113
 114         dst = _dump_buf_dif;
 115         while (sgde) {
 116                 src = sg_virt(sgde);
 117                 memcpy(dst, src, sgde->length);
 118                 dst += sgde->length;
 119                 sgde = sg_next(sgde);
 120         }
 121 }
 122
 123 /**
 124  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 125  * @phba: Pointer to HBA object.
 126  * @lpfc_cmd: lpfc scsi command object pointer.
 127  *
 128  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 129  * set the last bit in the response sge entry.
 130  **/
 131 static void
 132 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 133                                 struct lpfc_scsi_buf *lpfc_cmd)
 134 {
 135         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 136         if (sgl) {
 137                 sgl += 1;
 138                 sgl->word2 = le32_to_cpu(sgl->word2);
 139                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 140                 sgl->word2 = cpu_to_le32(sgl->word2);
 141         }
 142 }
 143
 144 /**
 145  * lpfc_update_stats - Update statistical data for the command completion
 146  * @phba: Pointer to HBA object.
 147  * @lpfc_cmd: lpfc scsi command object pointer.
 148  *
 149  * This function is called when there is a command completion and this
 150  * function updates the statistical data for the command completion.
 151  **/
 152 static void
 153 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 154 {
 155         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 156         struct lpfc_nodelist *pnode = rdata->pnode;
 157         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 158         unsigned long flags;
 159         struct Scsi_Host  *shost = cmd->device->host;
 160         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 161         unsigned long latency;
 162         int i;
 163
 164         if (cmd->result)
 165                 return;
 166
 167         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 168
 169         spin_lock_irqsave(shost->host_lock, flags);
 170         if (!vport->stat_data_enabled ||
 171                 vport->stat_data_blocked ||
 172                 !pnode ||
 173                 !pnode->lat_data ||
 174                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 175                 spin_unlock_irqrestore(shost->host_lock, flags);
 176                 return;
 177         }
 178
 179         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 180                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 181                         phba->bucket_step;
 182                 /* check array subscript bounds */
 183                 if (i < 0)
 184                         i = 0;
 185                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 186                         i = LPFC_MAX_BUCKET_COUNT - 1;
 187         } else {
 188                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 189                         if (latency <= (phba->bucket_base +
 190                                 ((1<<i)*phba->bucket_step)))
 191                                 break;
 192         }
 193
 194         pnode->lat_data[i].cmd_count++;
 195         spin_unlock_irqrestore(shost->host_lock, flags);
 196 }
 197
 198 /**
 199  * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
 200  * @phba: Pointer to HBA context object.
 201  * @vport: Pointer to vport object.
 202  * @ndlp: Pointer to FC node associated with the target.
 203  * @lun: Lun number of the scsi device.
 204  * @old_val: Old value of the queue depth.
 205  * @new_val: New value of the queue depth.
 206  *
 207  * This function sends an event to the mgmt application indicating
 208  * there is a change in the scsi device queue depth.
 209  **/
 210 static void
 211 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 212                 struct lpfc_vport  *vport,
 213                 struct lpfc_nodelist *ndlp,
 214                 uint32_t lun,
 215                 uint32_t old_val,
 216                 uint32_t new_val)
 217 {
 218         struct lpfc_fast_path_event *fast_path_evt;
 219         unsigned long flags;
 220
 221         fast_path_evt = lpfc_alloc_fast_evt(phba);
 222         if (!fast_path_evt)
 223                 return;
 224
 225         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 226                 FC_REG_SCSI_EVENT;
 227         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 228                 LPFC_EVENT_VARQUEDEPTH;
 229
 230         /* Report all luns with change in queue depth */
 231         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 232         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 233                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 234                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 235                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 236                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 237         }
 238
 239         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 240         fast_path_evt->un.queue_depth_evt.newval = new_val;
 241         fast_path_evt->vport = vport;
 242
 243         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 244         spin_lock_irqsave(&phba->hbalock, flags);
 245         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 246         spin_unlock_irqrestore(&phba->hbalock, flags);
 247         lpfc_worker_wake_up(phba);
 248
 249         return;
 250 }
 251
 252 /**
 253  * lpfc_change_queue_depth - Alter scsi device queue depth
 254  * @sdev: Pointer the scsi device on which to change the queue depth.
 255  * @qdepth: New queue depth to set the sdev to.
 256  * @reason: The reason for the queue depth change.
 257  *
 258  * This function is called by the midlayer and the LLD to alter the queue
 259  * depth for a scsi device. This function sets the queue depth to the new
 260  * value and sends an event out to log the queue depth change.
 261  **/
 262 int
 263 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 264 {
 265         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
 266         struct lpfc_hba   *phba = vport->phba;
 267         struct lpfc_rport_data *rdata;
 268         unsigned long new_queue_depth, old_queue_depth;
 269
 270         old_queue_depth = sdev->queue_depth;
 271         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
 272         new_queue_depth = sdev->queue_depth;
 273         rdata = sdev->hostdata;
 274         if (rdata)
 275                 lpfc_send_sdev_queuedepth_change_event(phba, vport,
 276                                                        rdata->pnode, sdev->lun,
 277                                                        old_queue_depth,
 278                                                        new_queue_depth);
 279         return sdev->queue_depth;
 280 }
 281
 282 /**
 283  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 284  * @phba: The Hba for which this call is being executed.
 285  *
 286  * This routine is called when there is resource error in driver or firmware.
 287  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 288  * posts at most 1 event each second. This routine wakes up worker thread of
 289  * @phba to process WORKER_RAM_DOWN_EVENT event.
 290  *
 291  * This routine should be called with no lock held.
 292  **/
 293 void
 294 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 295 {
 296         unsigned long flags;
 297         uint32_t evt_posted;
 298
 299         spin_lock_irqsave(&phba->hbalock, flags);
 300         atomic_inc(&phba->num_rsrc_err);
 301         phba->last_rsrc_error_time = jiffies;
 302
 303         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 304                 spin_unlock_irqrestore(&phba->hbalock, flags);
 305                 return;
 306         }
 307
 308         phba->last_ramp_down_time = jiffies;
 309
 310         spin_unlock_irqrestore(&phba->hbalock, flags);
 311
 312         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 313         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 314         if (!evt_posted)
 315                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 316         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 317
 318         if (!evt_posted)
 319                 lpfc_worker_wake_up(phba);
 320         return;
 321 }
 322
 323 /**
 324  * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
 325  * @phba: The Hba for which this call is being executed.
 326  *
 327  * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 328  * post at most 1 event every 5 minute after last_ramp_up_time or
 329  * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 330  * to process WORKER_RAM_DOWN_EVENT event.
 331  *
 332  * This routine should be called with no lock held.
 333  **/
 334 static inline void
 335 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 336                         uint32_t queue_depth)
 337 {
 338         unsigned long flags;
 339         struct lpfc_hba *phba = vport->phba;
 340         uint32_t evt_posted;
 341         atomic_inc(&phba->num_cmd_success);
 342
 343         if (vport->cfg_lun_queue_depth <= queue_depth)
 344                 return;
 345         spin_lock_irqsave(&phba->hbalock, flags);
 346         if (time_before(jiffies,
 347                         phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
 348             time_before(jiffies,
 349                         phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
 350                 spin_unlock_irqrestore(&phba->hbalock, flags);
 351                 return;
 352         }
 353         phba->last_ramp_up_time = jiffies;
 354         spin_unlock_irqrestore(&phba->hbalock, flags);
 355
 356         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 357         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 358         if (!evt_posted)
 359                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 360         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 361
 362         if (!evt_posted)
 363                 lpfc_worker_wake_up(phba);
 364         return;
 365 }
 366
 367 /**
 368  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 369  * @phba: The Hba for which this call is being executed.
 370  *
 371  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 372  * thread.This routine reduces queue depth for all scsi device on each vport
 373  * associated with @phba.
 374  **/
 375 void
 376 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 377 {
 378         struct lpfc_vport **vports;
 379         struct Scsi_Host  *shost;
 380         struct scsi_device *sdev;
 381         unsigned long new_queue_depth;
 382         unsigned long num_rsrc_err, num_cmd_success;
 383         int i;
 384
 385         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 386         num_cmd_success = atomic_read(&phba->num_cmd_success);
 387
 388         vports = lpfc_create_vport_work_array(phba);
 389         if (vports != NULL)
 390                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 391                         shost = lpfc_shost_from_vport(vports[i]);
 392                         shost_for_each_device(sdev, shost) {
 393                                 new_queue_depth =
 394                                         sdev->queue_depth * num_rsrc_err /
 395                                         (num_rsrc_err + num_cmd_success);
 396                                 if (!new_queue_depth)
 397                                         new_queue_depth = sdev->queue_depth - 1;
 398                                 else
 399                                         new_queue_depth = sdev->queue_depth -
 400                                                                 new_queue_depth;
 401                                 lpfc_change_queue_depth(sdev, new_queue_depth,
 402                                                         SCSI_QDEPTH_DEFAULT);
 403                         }
 404                 }
 405         lpfc_destroy_vport_work_array(phba, vports);
 406         atomic_set(&phba->num_rsrc_err, 0);
 407         atomic_set(&phba->num_cmd_success, 0);
 408 }
 409
 410 /**
 411  * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
 412  * @phba: The Hba for which this call is being executed.
 413  *
 414  * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 415  * thread.This routine increases queue depth for all scsi device on each vport
 416  * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 417  * num_cmd_success to zero.
 418  **/
 419 void
 420 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 421 {
 422         struct lpfc_vport **vports;
 423         struct Scsi_Host  *shost;
 424         struct scsi_device *sdev;
 425         int i;
 426
 427         vports = lpfc_create_vport_work_array(phba);
 428         if (vports != NULL)
 429                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 430                         shost = lpfc_shost_from_vport(vports[i]);
 431                         shost_for_each_device(sdev, shost) {
 432                                 if (vports[i]->cfg_lun_queue_depth <=
 433                                     sdev->queue_depth)
 434                                         continue;
 435                                 lpfc_change_queue_depth(sdev,
 436                                                         sdev->queue_depth+1,
 437                                                         SCSI_QDEPTH_RAMP_UP);
 438                         }
 439                 }
 440         lpfc_destroy_vport_work_array(phba, vports);
 441         atomic_set(&phba->num_rsrc_err, 0);
 442         atomic_set(&phba->num_cmd_success, 0);
 443 }
 444
 445 /**
 446  * lpfc_scsi_dev_block - set all scsi hosts to block state
 447  * @phba: Pointer to HBA context object.
 448  *
 449  * This function walks vport list and set each SCSI host to block state
 450  * by invoking fc_remote_port_delete() routine. This function is invoked
 451  * with EEH when device's PCI slot has been permanently disabled.
 452  **/
 453 void
 454 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 455 {
 456         struct lpfc_vport **vports;
 457         struct Scsi_Host  *shost;
 458         struct scsi_device *sdev;
 459         struct fc_rport *rport;
 460         int i;
 461
 462         vports = lpfc_create_vport_work_array(phba);
 463         if (vports != NULL)
 464                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 465                         shost = lpfc_shost_from_vport(vports[i]);
 466                         shost_for_each_device(sdev, shost) {
 467                                 rport = starget_to_rport(scsi_target(sdev));
 468                                 fc_remote_port_delete(rport);
 469                         }
 470                 }
 471         lpfc_destroy_vport_work_array(phba, vports);
 472 }
 473
 474 /**
 475  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 476  * @vport: The virtual port for which this call being executed.
 477  * @num_to_allocate: The requested number of buffers to allocate.
 478  *
 479  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 480  * the scsi buffer contains all the necessary information needed to initiate
 481  * a SCSI I/O. The non-DMAable buffer region contains information to build
 482  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 483  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 484  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 485  *
 486  * Return codes:
 487  *   int - number of scsi buffers that were allocated.
 488  *   0 = failure, less than num_to_alloc is a partial failure.
 489  **/
 490 static int
 491 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 492 {
 493         struct lpfc_hba *phba = vport->phba;
 494         struct lpfc_scsi_buf *psb;
 495         struct ulp_bde64 *bpl;
 496         IOCB_t *iocb;
 497         dma_addr_t pdma_phys_fcp_cmd;
 498         dma_addr_t pdma_phys_fcp_rsp;
 499         dma_addr_t pdma_phys_bpl;
 500         uint16_t iotag;
 501         int bcnt;
 502
 503         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 504                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 505                 if (!psb)
 506                         break;
 507
 508                 /*
 509                  * Get memory from the pci pool to map the virt space to pci
 510                  * bus space for an I/O.  The DMA buffer includes space for the
 511                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 512                  * necessary to support the sg_tablesize.
 513                  */
 514                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 515                                         GFP_KERNEL, &psb->dma_handle);
 516                 if (!psb->data) {
 517                         kfree(psb);
 518                         break;
 519                 }
 520
 521                 /* Initialize virtual ptrs to dma_buf region. */
 522                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 523
 524                 /* Allocate iotag for psb->cur_iocbq. */
 525                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 526                 if (iotag == 0) {
 527                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 528                                         psb->data, psb->dma_handle);
 529                         kfree(psb);
 530                         break;
 531                 }
 532                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 533
 534                 psb->fcp_cmnd = psb->data;
 535                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 536                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 537                         sizeof(struct fcp_rsp);
 538
 539                 /* Initialize local short-hand pointers. */
 540                 bpl = psb->fcp_bpl;
 541                 pdma_phys_fcp_cmd = psb->dma_handle;
 542                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 543                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 544                         sizeof(struct fcp_rsp);
 545
 546                 /*
 547                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 548                  * are sg list bdes.  Initialize the first two and leave the
 549                  * rest for queuecommand.
 550                  */
 551                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 552                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 553                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 554                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 555                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 556
 557                 /* Setup the physical region for the FCP RSP */
 558                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 559                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 560                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 561                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 562                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 563
 564                 /*
 565                  * Since the IOCB for the FCP I/O is built into this
 566                  * lpfc_scsi_buf, initialize it with all known data now.
 567                  */
 568                 iocb = &psb->cur_iocbq.iocb;
 569                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 570                 if ((phba->sli_rev == 3) &&
 571                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 572                         /* fill in immediate fcp command BDE */
 573                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 574                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 575                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 576                                         unsli3.fcp_ext.icd);
 577                         iocb->un.fcpi64.bdl.addrHigh = 0;
 578                         iocb->ulpBdeCount = 0;
 579                         iocb->ulpLe = 0;
 580                         /* fill in response BDE */
 581                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 582                                                         BUFF_TYPE_BDE_64;
 583                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 584                                 sizeof(struct fcp_rsp);
 585                         iocb->unsli3.fcp_ext.rbde.addrLow =
 586                                 putPaddrLow(pdma_phys_fcp_rsp);
 587                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 588                                 putPaddrHigh(pdma_phys_fcp_rsp);
 589                 } else {
 590                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 591                         iocb->un.fcpi64.bdl.bdeSize =
 592                                         (2 * sizeof(struct ulp_bde64));
 593                         iocb->un.fcpi64.bdl.addrLow =
 594                                         putPaddrLow(pdma_phys_bpl);
 595                         iocb->un.fcpi64.bdl.addrHigh =
 596                                         putPaddrHigh(pdma_phys_bpl);
 597                         iocb->ulpBdeCount = 1;
 598                         iocb->ulpLe = 1;
 599                 }
 600                 iocb->ulpClass = CLASS3;
 601                 psb->status = IOSTAT_SUCCESS;
 602                 /* Put it back into the SCSI buffer list */
 603                 psb->cur_iocbq.context1  = psb;
 604                 lpfc_release_scsi_buf_s3(phba, psb);
 605
 606         }
 607
 608         return bcnt;
 609 }
 610
 611 /**
 612  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 613  * @vport: pointer to lpfc vport data structure.
 614  *
 615  * This routine is invoked by the vport cleanup for deletions and the cleanup
 616  * for an ndlp on removal.
 617  **/
 618 void
 619 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 620 {
 621         struct lpfc_hba *phba = vport->phba;
 622         struct lpfc_scsi_buf *psb, *next_psb;
 623         unsigned long iflag = 0;
 624
 625         spin_lock_irqsave(&phba->hbalock, iflag);
 626         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 627         list_for_each_entry_safe(psb, next_psb,
 628                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 629                 if (psb->rdata && psb->rdata->pnode
 630                         && psb->rdata->pnode->vport == vport)
 631                         psb->rdata = NULL;
 632         }
 633         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 634         spin_unlock_irqrestore(&phba->hbalock, iflag);
 635 }
 636
 637 /**
 638  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 639  * @phba: pointer to lpfc hba data structure.
 640  * @axri: pointer to the fcp xri abort wcqe structure.
 641  *
 642  * This routine is invoked by the worker thread to process a SLI4 fast-path
 643  * FCP aborted xri.
 644  **/
 645 void
 646 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 647                           struct sli4_wcqe_xri_aborted *axri)
 648 {
 649         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 650         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 651         struct lpfc_scsi_buf *psb, *next_psb;
 652         unsigned long iflag = 0;
 653         struct lpfc_iocbq *iocbq;
 654         int i;
 655         struct lpfc_nodelist *ndlp;
 656         int rrq_empty = 0;
 657         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 658
 659         spin_lock_irqsave(&phba->hbalock, iflag);
 660         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 661         list_for_each_entry_safe(psb, next_psb,
 662                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 663                 if (psb->cur_iocbq.sli4_xritag == xri) {
 664                         list_del(&psb->list);
 665                         psb->exch_busy = 0;
 666                         psb->status = IOSTAT_SUCCESS;
 667                         spin_unlock(
 668                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 669                         if (psb->rdata && psb->rdata->pnode)
 670                                 ndlp = psb->rdata->pnode;
 671                         else
 672                                 ndlp = NULL;
 673
 674                         rrq_empty = list_empty(&phba->active_rrq_list);
 675                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 676                         if (ndlp)
 677                                 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1);
 678                         lpfc_release_scsi_buf_s4(phba, psb);
 679                         if (rrq_empty)
 680                                 lpfc_worker_wake_up(phba);
 681                         return;
 682                 }
 683         }
 684         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 685         for (i = 1; i <= phba->sli.last_iotag; i++) {
 686                 iocbq = phba->sli.iocbq_lookup[i];
 687
 688                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 689                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 690                         continue;
 691                 if (iocbq->sli4_xritag != xri)
 692                         continue;
 693                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 694                 psb->exch_busy = 0;
 695                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 696                 if (pring->txq_cnt)
 697                         lpfc_worker_wake_up(phba);
 698                 return;
 699
 700         }
 701         spin_unlock_irqrestore(&phba->hbalock, iflag);
 702 }
 703
 704 /**
 705  * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
 706  * @phba: pointer to lpfc hba data structure.
 707  *
 708  * This routine walks the list of scsi buffers that have been allocated and
 709  * repost them to the HBA by using SGL block post. This is needed after a
 710  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 711  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 712  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 713  *
 714  * Returns: 0 = success, non-zero failure.
 715  **/
 716 int
 717 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 718 {
 719         struct lpfc_scsi_buf *psb;
 720         int index, status, bcnt = 0, rcnt = 0, rc = 0;
 721         LIST_HEAD(sblist);
 722
 723         for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
 724                 psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
 725                 if (psb) {
 726                         /* Remove from SCSI buffer list */
 727                         list_del(&psb->list);
 728                         /* Add it to a local SCSI buffer list */
 729                         list_add_tail(&psb->list, &sblist);
 730                         if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 731                                 bcnt = rcnt;
 732                                 rcnt = 0;
 733                         }
 734                 } else
 735                         /* A hole present in the XRI array, need to skip */
 736                         bcnt = rcnt;
 737
 738                 if (index == phba->sli4_hba.scsi_xri_cnt - 1)
 739                         /* End of XRI array for SCSI buffer, complete */
 740                         bcnt = rcnt;
 741
 742                 /* Continue until collect up to a nembed page worth of sgls */
 743                 if (bcnt == 0)
 744                         continue;
 745                 /* Now, post the SCSI buffer list sgls as a block */
 746                 if (!phba->sli4_hba.extents_in_use)
 747                         status = lpfc_sli4_post_scsi_sgl_block(phba,
 748                                                         &sblist,
 749                                                         bcnt);
 750                 else
 751                         status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
 752                                                         &sblist,
 753                                                         bcnt);
 754                 /* Reset SCSI buffer count for next round of posting */
 755                 bcnt = 0;
 756                 while (!list_empty(&sblist)) {
 757                         list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
 758                                          list);
 759                         if (status) {
 760                                 /* Put this back on the abort scsi list */
 761                                 psb->exch_busy = 1;
 762                                 rc++;
 763                         } else {
 764                                 psb->exch_busy = 0;
 765                                 psb->status = IOSTAT_SUCCESS;
 766                         }
 767                         /* Put it back into the SCSI buffer list */
 768                         lpfc_release_scsi_buf_s4(phba, psb);
 769                 }
 770         }
 771         return rc;
 772 }
 773
 774 /**
 775  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 776  * @vport: The virtual port for which this call being executed.
 777  * @num_to_allocate: The requested number of buffers to allocate.
 778  *
 779  * This routine allocates a scsi buffer for device with SLI-4 interface spec,
 780  * the scsi buffer contains all the necessary information needed to initiate
 781  * a SCSI I/O.
 782  *
 783  * Return codes:
 784  *   int - number of scsi buffers that were allocated.
 785  *   0 = failure, less than num_to_alloc is a partial failure.
 786  **/
 787 static int
 788 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 789 {
 790         struct lpfc_hba *phba = vport->phba;
 791         struct lpfc_scsi_buf *psb;
 792         struct sli4_sge *sgl;
 793         IOCB_t *iocb;
 794         dma_addr_t pdma_phys_fcp_cmd;
 795         dma_addr_t pdma_phys_fcp_rsp;
 796         dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
 797         uint16_t iotag, last_xritag = NO_XRI, lxri = 0;
 798         int status = 0, index;
 799         int bcnt;
 800         int non_sequential_xri = 0;
 801         LIST_HEAD(sblist);
 802
 803         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 804                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 805                 if (!psb)
 806                         break;
 807
 808                 /*
 809                  * Get memory from the pci pool to map the virt space to pci bus
 810                  * space for an I/O.  The DMA buffer includes space for the
 811                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 812                  * necessary to support the sg_tablesize.
 813                  */
 814                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 815                                                 GFP_KERNEL, &psb->dma_handle);
 816                 if (!psb->data) {
 817                         kfree(psb);
 818                         break;
 819                 }
 820
 821                 /* Initialize virtual ptrs to dma_buf region. */
 822                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 823
 824                 /* Allocate iotag for psb->cur_iocbq. */
 825                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 826                 if (iotag == 0) {
 827                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 828                                 psb->data, psb->dma_handle);
 829                         kfree(psb);
 830                         break;
 831                 }
 832
 833                 lxri = lpfc_sli4_next_xritag(phba);
 834                 if (lxri == NO_XRI) {
 835                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 836                               psb->data, psb->dma_handle);
 837                         kfree(psb);
 838                         break;
 839                 }
 840                 psb->cur_iocbq.sli4_lxritag = lxri;
 841                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 842                 if (last_xritag != NO_XRI
 843                         && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
 844                         non_sequential_xri = 1;
 845                 } else
 846                         list_add_tail(&psb->list, &sblist);
 847                 last_xritag = psb->cur_iocbq.sli4_xritag;
 848
 849                 index = phba->sli4_hba.scsi_xri_cnt++;
 850                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 851
 852                 psb->fcp_bpl = psb->data;
 853                 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
 854                         - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 855                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 856                                         sizeof(struct fcp_cmnd));
 857
 858                 /* Initialize local short-hand pointers. */
 859                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 860                 pdma_phys_bpl = psb->dma_handle;
 861                 pdma_phys_fcp_cmd =
 862                         (psb->dma_handle + phba->cfg_sg_dma_buf_size)
 863                          - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 864                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 865
 866                 /*
 867                  * The first two bdes are the FCP_CMD and FCP_RSP.  The balance
 868                  * are sg list bdes.  Initialize the first two and leave the
 869                  * rest for queuecommand.
 870                  */
 871                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 872                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 873                 sgl->word2 = le32_to_cpu(sgl->word2);
 874                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 875                 sgl->word2 = cpu_to_le32(sgl->word2);
 876                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 877                 sgl++;
 878
 879                 /* Setup the physical region for the FCP RSP */
 880                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 881                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 882                 sgl->word2 = le32_to_cpu(sgl->word2);
 883                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 884                 sgl->word2 = cpu_to_le32(sgl->word2);
 885                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 886
 887                 /*
 888                  * Since the IOCB for the FCP I/O is built into this
 889                  * lpfc_scsi_buf, initialize it with all known data now.
 890                  */
 891                 iocb = &psb->cur_iocbq.iocb;
 892                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 893                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 894                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
 895                  * We are setting the bpl to point to out sgl. An sgl's
 896                  * entries are 16 bytes, a bpl entries are 12 bytes.
 897                  */
 898                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 899                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 900                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 901                 iocb->ulpBdeCount = 1;
 902                 iocb->ulpLe = 1;
 903                 iocb->ulpClass = CLASS3;
 904                 psb->cur_iocbq.context1  = psb;
 905                 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
 906                         pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
 907                 else
 908                         pdma_phys_bpl1 = 0;
 909                 psb->dma_phys_bpl = pdma_phys_bpl;
 910                 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
 911                 if (non_sequential_xri) {
 912                         status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
 913                                                 pdma_phys_bpl1,
 914                                                 psb->cur_iocbq.sli4_xritag);
 915                         if (status) {
 916                                 /* Put this back on the abort scsi list */
 917                                 psb->exch_busy = 1;
 918                         } else {
 919                                 psb->exch_busy = 0;
 920                                 psb->status = IOSTAT_SUCCESS;
 921                         }
 922                         /* Put it back into the SCSI buffer list */
 923                         lpfc_release_scsi_buf_s4(phba, psb);
 924                         break;
 925                 }
 926         }
 927         if (bcnt) {
 928                 if (!phba->sli4_hba.extents_in_use)
 929                         status = lpfc_sli4_post_scsi_sgl_block(phba,
 930                                                                 &sblist,
 931                                                                 bcnt);
 932                 else
 933                         status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
 934                                                                 &sblist,
 935                                                                 bcnt);
 936
 937                 if (status) {
 938                         lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
 939                                         "3021 SCSI SGL post error %d\n",
 940                                         status);
 941                         bcnt = 0;
 942                 }
 943                 /* Reset SCSI buffer count for next round of posting */
 944                 while (!list_empty(&sblist)) {
 945                         list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
 946                                  list);
 947                         if (status) {
 948                                 /* Put this back on the abort scsi list */
 949                                 psb->exch_busy = 1;
 950                         } else {
 951                                 psb->exch_busy = 0;
 952                                 psb->status = IOSTAT_SUCCESS;
 953                         }
 954                         /* Put it back into the SCSI buffer list */
 955                         lpfc_release_scsi_buf_s4(phba, psb);
 956                 }
 957         }
 958
 959         return bcnt + non_sequential_xri;
 960 }
 961
 962 /**
 963  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 964  * @vport: The virtual port for which this call being executed.
 965  * @num_to_allocate: The requested number of buffers to allocate.
 966  *
 967  * This routine wraps the actual SCSI buffer allocator function pointer from
 968  * the lpfc_hba struct.
 969  *
 970  * Return codes:
 971  *   int - number of scsi buffers that were allocated.
 972  *   0 = failure, less than num_to_alloc is a partial failure.
 973  **/
 974 static inline int
 975 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
 976 {
 977         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
 978 }
 979
 980 /**
 981  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 982  * @phba: The HBA for which this call is being executed.
 983  *
 984  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 985  * and returns to caller.
 986  *
 987  * Return codes:
 988  *   NULL - Error
 989  *   Pointer to lpfc_scsi_buf - Success
 990  **/
 991 static struct lpfc_scsi_buf*
 992 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 993 {
 994         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 995         struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
 996         unsigned long iflag = 0;
 997
 998         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
 999         list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1000         if (lpfc_cmd) {
1001                 lpfc_cmd->seg_cnt = 0;
1002                 lpfc_cmd->nonsg_phys = 0;
1003                 lpfc_cmd->prot_seg_cnt = 0;
1004         }
1005         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1006         return  lpfc_cmd;
1007 }
1008 /**
1009  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1010  * @phba: The HBA for which this call is being executed.
1011  *
1012  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1013  * and returns to caller.
1014  *
1015  * Return codes:
1016  *   NULL - Error
1017  *   Pointer to lpfc_scsi_buf - Success
1018  **/
1019 static struct lpfc_scsi_buf*
1020 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1021 {
1022         struct lpfc_scsi_buf *lpfc_cmd ;
1023         unsigned long iflag = 0;
1024         int found = 0;
1025
1026         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1027         list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,
1028                                                         list) {
1029                 if (lpfc_test_rrq_active(phba, ndlp,
1030                                          lpfc_cmd->cur_iocbq.sli4_xritag))
1031                         continue;
1032                 list_del(&lpfc_cmd->list);
1033                 found = 1;
1034                 lpfc_cmd->seg_cnt = 0;
1035                 lpfc_cmd->nonsg_phys = 0;
1036                 lpfc_cmd->prot_seg_cnt = 0;
1037                 break;
1038         }
1039         spin_unlock_irqrestore(&phba->scsi_buf_list_lock,
1040                                                  iflag);
1041         if (!found)
1042                 return NULL;
1043         else
1044                 return  lpfc_cmd;
1045 }
1046 /**
1047  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1048  * @phba: The HBA for which this call is being executed.
1049  *
1050  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1051  * and returns to caller.
1052  *
1053  * Return codes:
1054  *   NULL - Error
1055  *   Pointer to lpfc_scsi_buf - Success
1056  **/
1057 static struct lpfc_scsi_buf*
1058 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1059 {
1060         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1061 }
1062
1063 /**
1064  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1065  * @phba: The Hba for which this call is being executed.
1066  * @psb: The scsi buffer which is being released.
1067  *
1068  * This routine releases @psb scsi buffer by adding it to tail of @phba
1069  * lpfc_scsi_buf_list list.
1070  **/
1071 static void
1072 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1073 {
1074         unsigned long iflag = 0;
1075
1076         spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1077         psb->pCmd = NULL;
1078         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1079         spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1080 }
1081
1082 /**
1083  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1084  * @phba: The Hba for which this call is being executed.
1085  * @psb: The scsi buffer which is being released.
1086  *
1087  * This routine releases @psb scsi buffer by adding it to tail of @phba
1088  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1089  * and cannot be reused for at least RA_TOV amount of time if it was
1090  * aborted.
1091  **/
1092 static void
1093 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1094 {
1095         unsigned long iflag = 0;
1096
1097         if (psb->exch_busy) {
1098                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1099                                         iflag);
1100                 psb->pCmd = NULL;
1101                 list_add_tail(&psb->list,
1102                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1103                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1104                                         iflag);
1105         } else {
1106
1107                 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1108                 psb->pCmd = NULL;
1109                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1110                 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1111         }
1112 }
1113
1114 /**
1115  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1116  * @phba: The Hba for which this call is being executed.
1117  * @psb: The scsi buffer which is being released.
1118  *
1119  * This routine releases @psb scsi buffer by adding it to tail of @phba
1120  * lpfc_scsi_buf_list list.
1121  **/
1122 static void
1123 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1124 {
1125
1126         phba->lpfc_release_scsi_buf(phba, psb);
1127 }
1128
1129 /**
1130  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1131  * @phba: The Hba for which this call is being executed.
1132  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1133  *
1134  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1135  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1136  * through sg elements and format the bdea. This routine also initializes all
1137  * IOCB fields which are dependent on scsi command request buffer.
1138  *
1139  * Return codes:
1140  *   1 - Error
1141  *   0 - Success
1142  **/
1143 static int
1144 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1145 {
1146         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1147         struct scatterlist *sgel = NULL;
1148         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1149         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1150         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1151         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1152         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1153         dma_addr_t physaddr;
1154         uint32_t num_bde = 0;
1155         int nseg, datadir = scsi_cmnd->sc_data_direction;
1156
1157         /*
1158          * There are three possibilities here - use scatter-gather segment, use
1159          * the single mapping, or neither.  Start the lpfc command prep by
1160          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1161          * data bde entry.
1162          */
1163         bpl += 2;
1164         if (scsi_sg_count(scsi_cmnd)) {
1165                 /*
1166                  * The driver stores the segment count returned from pci_map_sg
1167                  * because this a count of dma-mappings used to map the use_sg
1168                  * pages.  They are not guaranteed to be the same for those
1169                  * architectures that implement an IOMMU.
1170                  */
1171
1172                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1173                                   scsi_sg_count(scsi_cmnd), datadir);
1174                 if (unlikely(!nseg))
1175                         return 1;
1176
1177                 lpfc_cmd->seg_cnt = nseg;
1178                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1179                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1180                                 "9064 BLKGRD: %s: Too many sg segments from "
1181                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1182                                __func__, phba->cfg_sg_seg_cnt,
1183                                lpfc_cmd->seg_cnt);
1184                         scsi_dma_unmap(scsi_cmnd);
1185                         return 1;
1186                 }
1187
1188                 /*
1189                  * The driver established a maximum scatter-gather segment count
1190                  * during probe that limits the number of sg elements in any
1191                  * single scsi command.  Just run through the seg_cnt and format
1192                  * the bde's.
1193                  * When using SLI-3 the driver will try to fit all the BDEs into
1194                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1195                  * does for SLI-2 mode.
1196                  */
1197                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1198                         physaddr = sg_dma_address(sgel);
1199                         if (phba->sli_rev == 3 &&
1200                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1201                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1202                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1203                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1204                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1205                                 data_bde->addrLow = putPaddrLow(physaddr);
1206                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1207                                 data_bde++;
1208                         } else {
1209                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1210                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1211                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1212                                 bpl->addrLow =
1213                                         le32_to_cpu(putPaddrLow(physaddr));
1214                                 bpl->addrHigh =
1215                                         le32_to_cpu(putPaddrHigh(physaddr));
1216                                 bpl++;
1217                         }
1218                 }
1219         }
1220
1221         /*
1222          * Finish initializing those IOCB fields that are dependent on the
1223          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1224          * explicitly reinitialized and for SLI-3 the extended bde count is
1225          * explicitly reinitialized since all iocb memory resources are reused.
1226          */
1227         if (phba->sli_rev == 3 &&
1228             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1229             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1230                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1231                         /*
1232                          * The extended IOCB format can only fit 3 BDE or a BPL.
1233                          * This I/O has more than 3 BDE so the 1st data bde will
1234                          * be a BPL that is filled in here.
1235                          */
1236                         physaddr = lpfc_cmd->dma_handle;
1237                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1238                         data_bde->tus.f.bdeSize = (num_bde *
1239                                                    sizeof(struct ulp_bde64));
1240                         physaddr += (sizeof(struct fcp_cmnd) +
1241                                      sizeof(struct fcp_rsp) +
1242                                      (2 * sizeof(struct ulp_bde64)));
1243                         data_bde->addrHigh = putPaddrHigh(physaddr);
1244                         data_bde->addrLow = putPaddrLow(physaddr);
1245                         /* ebde count includes the response bde and data bpl */
1246                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1247                 } else {
1248                         /* ebde count includes the response bde and data bdes */
1249                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1250                 }
1251         } else {
1252                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1253                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1254                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1255         }
1256         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1257
1258         /*
1259          * Due to difference in data length between DIF/non-DIF paths,
1260          * we need to set word 4 of IOCB here
1261          */
1262         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1263         return 0;
1264 }
1265
1266 /*
1267  * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
1268  * @sc: The SCSI command to examine
1269  * @txopt: (out) BlockGuard operation for transmitted data
1270  * @rxopt: (out) BlockGuard operation for received data
1271  *
1272  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1273  *
1274  */
1275 static int
1276 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1277                 uint8_t *txop, uint8_t *rxop)
1278 {
1279         uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1280         uint8_t ret = 0;
1281
1282         if (guard_type == SHOST_DIX_GUARD_IP) {
1283                 switch (scsi_get_prot_op(sc)) {
1284                 case SCSI_PROT_READ_INSERT:
1285                 case SCSI_PROT_WRITE_STRIP:
1286                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1287                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1288                         break;
1289
1290                 case SCSI_PROT_READ_STRIP:
1291                 case SCSI_PROT_WRITE_INSERT:
1292                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1293                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1294                         break;
1295
1296                 case SCSI_PROT_READ_PASS:
1297                 case SCSI_PROT_WRITE_PASS:
1298                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1299                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1300                         break;
1301
1302                 case SCSI_PROT_NORMAL:
1303                 default:
1304                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1305                                 "9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1306                                         scsi_get_prot_op(sc), guard_type);
1307                         ret = 1;
1308                         break;
1309
1310                 }
1311         } else if (guard_type == SHOST_DIX_GUARD_CRC) {
1312                 switch (scsi_get_prot_op(sc)) {
1313                 case SCSI_PROT_READ_STRIP:
1314                 case SCSI_PROT_WRITE_INSERT:
1315                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1316                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1317                         break;
1318
1319                 case SCSI_PROT_READ_PASS:
1320                 case SCSI_PROT_WRITE_PASS:
1321                         *txop = BG_OP_IN_CRC_OUT_CRC;
1322                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1323                         break;
1324
1325                 case SCSI_PROT_READ_INSERT:
1326                 case SCSI_PROT_WRITE_STRIP:
1327                 case SCSI_PROT_NORMAL:
1328                 default:
1329                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1330                                 "9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1331                                         scsi_get_prot_op(sc), guard_type);
1332                         ret = 1;
1333                         break;
1334                 }
1335         } else {
1336                 /* unsupported format */
1337                 BUG();
1338         }
1339
1340         return ret;
1341 }
1342
1343 struct scsi_dif_tuple {
1344         __be16 guard_tag;       /* Checksum */
1345         __be16 app_tag;         /* Opaque storage */
1346         __be32 ref_tag;         /* Target LBA or indirect LBA */
1347 };
1348
1349 static inline unsigned
1350 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1351 {
1352         return sc->device->sector_size;
1353 }
1354
1355 /**
1356  * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
1357  * @sc:             in: SCSI command
1358  * @apptagmask:     out: app tag mask
1359  * @apptagval:      out: app tag value
1360  * @reftag:         out: ref tag (reference tag)
1361  *
1362  * Description:
1363  *   Extract DIF parameters from the command if possible.  Otherwise,
1364  *   use default parameters.
1365  *
1366  **/
1367 static inline void
1368 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
1369                 uint16_t *apptagval, uint32_t *reftag)
1370 {
1371         struct  scsi_dif_tuple *spt;
1372         unsigned char op = scsi_get_prot_op(sc);
1373         unsigned int protcnt = scsi_prot_sg_count(sc);
1374         static int cnt;
1375
1376         if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1377                                 op == SCSI_PROT_WRITE_PASS)) {
1378
1379                 cnt++;
1380                 spt = page_address(sg_page(scsi_prot_sglist(sc))) +
1381                         scsi_prot_sglist(sc)[0].offset;
1382                 *apptagmask = 0;
1383                 *apptagval = 0;
1384                 *reftag = cpu_to_be32(spt->ref_tag);
1385
1386         } else {
1387                 /* SBC defines ref tag to be lower 32bits of LBA */
1388                 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
1389                 *apptagmask = 0;
1390                 *apptagval = 0;
1391         }
1392 }
1393
1394 /*
1395  * This function sets up buffer list for protection groups of
1396  * type LPFC_PG_TYPE_NO_DIF
1397  *
1398  * This is usually used when the HBA is instructed to generate
1399  * DIFs and insert them into data stream (or strip DIF from
1400  * incoming data stream)
1401  *
1402  * The buffer list consists of just one protection group described
1403  * below:
1404  *                                +-------------------------+
1405  *   start of prot group  -->     |          PDE_5          |
1406  *                                +-------------------------+
1407  *                                |          PDE_6          |
1408  *                                +-------------------------+
1409  *                                |         Data BDE        |
1410  *                                +-------------------------+
1411  *                                |more Data BDE's ... (opt)|
1412  *                                +-------------------------+
1413  *
1414  * @sc: pointer to scsi command we're working on
1415  * @bpl: pointer to buffer list for protection groups
1416  * @datacnt: number of segments of data that have been dma mapped
1417  *
1418  * Note: Data s/g buffers have been dma mapped
1419  */
1420 static int
1421 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1422                 struct ulp_bde64 *bpl, int datasegcnt)
1423 {
1424         struct scatterlist *sgde = NULL; /* s/g data entry */
1425         struct lpfc_pde5 *pde5 = NULL;
1426         struct lpfc_pde6 *pde6 = NULL;
1427         dma_addr_t physaddr;
1428         int i = 0, num_bde = 0, status;
1429         int datadir = sc->sc_data_direction;
1430         unsigned blksize;
1431         uint32_t reftag;
1432         uint16_t apptagmask, apptagval;
1433         uint8_t txop, rxop;
1434
1435         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1436         if (status)
1437                 goto out;
1438
1439         /* extract some info from the scsi command for pde*/
1440         blksize = lpfc_cmd_blksize(sc);
1441         lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1442
1443         /* setup PDE5 with what we have */
1444         pde5 = (struct lpfc_pde5 *) bpl;
1445         memset(pde5, 0, sizeof(struct lpfc_pde5));
1446         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1447         pde5->reftag = reftag;
1448
1449         /* Endianness conversion if necessary for PDE5 */
1450         pde5->word0 = cpu_to_le32(pde5->word0);
1451         pde5->reftag = cpu_to_le32(pde5->reftag);
1452
1453         /* advance bpl and increment bde count */
1454         num_bde++;
1455         bpl++;
1456         pde6 = (struct lpfc_pde6 *) bpl;
1457
1458         /* setup PDE6 with the rest of the info */
1459         memset(pde6, 0, sizeof(struct lpfc_pde6));
1460         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1461         bf_set(pde6_optx, pde6, txop);
1462         bf_set(pde6_oprx, pde6, rxop);
1463         if (datadir == DMA_FROM_DEVICE) {
1464                 bf_set(pde6_ce, pde6, 1);
1465                 bf_set(pde6_re, pde6, 1);
1466                 bf_set(pde6_ae, pde6, 1);
1467         }
1468         bf_set(pde6_ai, pde6, 1);
1469         bf_set(pde6_apptagval, pde6, apptagval);
1470
1471         /* Endianness conversion if necessary for PDE6 */
1472         pde6->word0 = cpu_to_le32(pde6->word0);
1473         pde6->word1 = cpu_to_le32(pde6->word1);
1474         pde6->word2 = cpu_to_le32(pde6->word2);
1475
1476         /* advance bpl and increment bde count */
1477         num_bde++;
1478         bpl++;
1479
1480         /* assumption: caller has already run dma_map_sg on command data */
1481         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1482                 physaddr = sg_dma_address(sgde);
1483                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1484                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1485                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1486                 if (datadir == DMA_TO_DEVICE)
1487                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1488                 else
1489                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1490                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1491                 bpl++;
1492                 num_bde++;
1493         }
1494
1495 out:
1496         return num_bde;
1497 }
1498
1499 /*
1500  * This function sets up buffer list for protection groups of
1501  * type LPFC_PG_TYPE_DIF_BUF
1502  *
1503  * This is usually used when DIFs are in their own buffers,
1504  * separate from the data. The HBA can then by instructed
1505  * to place the DIFs in the outgoing stream.  For read operations,
1506  * The HBA could extract the DIFs and place it in DIF buffers.
1507  *
1508  * The buffer list for this type consists of one or more of the
1509  * protection groups described below:
1510  *                                    +-------------------------+
1511  *   start of first prot group  -->   |          PDE_5          |
1512  *                                    +-------------------------+
1513  *                                    |          PDE_6          |
1514  *                                    +-------------------------+
1515  *                                    |      PDE_7 (Prot BDE)   |
1516  *                                    +-------------------------+
1517  *                                    |        Data BDE         |
1518  *                                    +-------------------------+
1519  *                                    |more Data BDE's ... (opt)|
1520  *                                    +-------------------------+
1521  *   start of new  prot group  -->    |          PDE_5          |
1522  *                                    +-------------------------+
1523  *                                    |          ...            |
1524  *                                    +-------------------------+
1525  *
1526  * @sc: pointer to scsi command we're working on
1527  * @bpl: pointer to buffer list for protection groups
1528  * @datacnt: number of segments of data that have been dma mapped
1529  * @protcnt: number of segment of protection data that have been dma mapped
1530  *
1531  * Note: It is assumed that both data and protection s/g buffers have been
1532  *       mapped for DMA
1533  */
1534 static int
1535 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1536                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1537 {
1538         struct scatterlist *sgde = NULL; /* s/g data entry */
1539         struct scatterlist *sgpe = NULL; /* s/g prot entry */
1540         struct lpfc_pde5 *pde5 = NULL;
1541         struct lpfc_pde6 *pde6 = NULL;
1542         struct lpfc_pde7 *pde7 = NULL;
1543         dma_addr_t dataphysaddr, protphysaddr;
1544         unsigned short curr_data = 0, curr_prot = 0;
1545         unsigned int split_offset;
1546         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1547         unsigned int protgrp_blks, protgrp_bytes;
1548         unsigned int remainder, subtotal;
1549         int status;
1550         int datadir = sc->sc_data_direction;
1551         unsigned char pgdone = 0, alldone = 0;
1552         unsigned blksize;
1553         uint32_t reftag;
1554         uint16_t apptagmask, apptagval;
1555         uint8_t txop, rxop;
1556         int num_bde = 0;
1557
1558         sgpe = scsi_prot_sglist(sc);
1559         sgde = scsi_sglist(sc);
1560
1561         if (!sgpe || !sgde) {
1562                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1563                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1564                                 sgpe, sgde);
1565                 return 0;
1566         }
1567
1568         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1569         if (status)
1570                 goto out;
1571
1572         /* extract some info from the scsi command */
1573         blksize = lpfc_cmd_blksize(sc);
1574         lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
1575
1576         split_offset = 0;
1577         do {
1578                 /* setup PDE5 with what we have */
1579                 pde5 = (struct lpfc_pde5 *) bpl;
1580                 memset(pde5, 0, sizeof(struct lpfc_pde5));
1581                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1582                 pde5->reftag = reftag;
1583
1584                 /* Endianness conversion if necessary for PDE5 */
1585                 pde5->word0 = cpu_to_le32(pde5->word0);
1586                 pde5->reftag = cpu_to_le32(pde5->reftag);
1587
1588                 /* advance bpl and increment bde count */
1589                 num_bde++;
1590                 bpl++;
1591                 pde6 = (struct lpfc_pde6 *) bpl;
1592
1593                 /* setup PDE6 with the rest of the info */
1594                 memset(pde6, 0, sizeof(struct lpfc_pde6));
1595                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1596                 bf_set(pde6_optx, pde6, txop);
1597                 bf_set(pde6_oprx, pde6, rxop);
1598                 bf_set(pde6_ce, pde6, 1);
1599                 bf_set(pde6_re, pde6, 1);
1600                 bf_set(pde6_ae, pde6, 1);
1601                 bf_set(pde6_ai, pde6, 1);
1602                 bf_set(pde6_apptagval, pde6, apptagval);
1603
1604                 /* Endianness conversion if necessary for PDE6 */
1605                 pde6->word0 = cpu_to_le32(pde6->word0);
1606                 pde6->word1 = cpu_to_le32(pde6->word1);
1607                 pde6->word2 = cpu_to_le32(pde6->word2);
1608
1609                 /* advance bpl and increment bde count */
1610                 num_bde++;
1611                 bpl++;
1612
1613                 /* setup the first BDE that points to protection buffer */
1614                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1615                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1616
1617                 /* must be integer multiple of the DIF block length */
1618                 BUG_ON(protgroup_len % 8);
1619
1620                 pde7 = (struct lpfc_pde7 *) bpl;
1621                 memset(pde7, 0, sizeof(struct lpfc_pde7));
1622                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1623
1624                 pde7->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
1625                 pde7->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1626
1627                 protgrp_blks = protgroup_len / 8;
1628                 protgrp_bytes = protgrp_blks * blksize;
1629
1630                 /* check if this pde is crossing the 4K boundary; if so split */
1631                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1632                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1633                         protgroup_offset += protgroup_remainder;
1634                         protgrp_blks = protgroup_remainder / 8;
1635                         protgrp_bytes = protgroup_remainder * blksize;
1636                 } else {
1637                         protgroup_offset = 0;
1638                         curr_prot++;
1639                 }
1640
1641                 num_bde++;
1642
1643                 /* setup BDE's for data blocks associated with DIF data */
1644                 pgdone = 0;
1645                 subtotal = 0; /* total bytes processed for current prot grp */
1646                 while (!pgdone) {
1647                         if (!sgde) {
1648                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1649                                         "9065 BLKGRD:%s Invalid data segment\n",
1650                                                 __func__);
1651                                 return 0;
1652                         }
1653                         bpl++;
1654                         dataphysaddr = sg_dma_address(sgde) + split_offset;
1655                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1656                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1657
1658                         remainder = sg_dma_len(sgde) - split_offset;
1659
1660                         if ((subtotal + remainder) <= protgrp_bytes) {
1661                                 /* we can use this whole buffer */
1662                                 bpl->tus.f.bdeSize = remainder;
1663                                 split_offset = 0;
1664
1665                                 if ((subtotal + remainder) == protgrp_bytes)
1666                                         pgdone = 1;
1667                         } else {
1668                                 /* must split this buffer with next prot grp */
1669                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1670                                 split_offset += bpl->tus.f.bdeSize;
1671                         }
1672
1673                         subtotal += bpl->tus.f.bdeSize;
1674
1675                         if (datadir == DMA_TO_DEVICE)
1676                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1677                         else
1678                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1679                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
1680
1681                         num_bde++;
1682                         curr_data++;
1683
1684                         if (split_offset)
1685                                 break;
1686
1687                         /* Move to the next s/g segment if possible */
1688                         sgde = sg_next(sgde);
1689
1690                 }
1691
1692                 if (protgroup_offset) {
1693                         /* update the reference tag */
1694                         reftag += protgrp_blks;
1695                         bpl++;
1696                         continue;
1697                 }
1698
1699                 /* are we done ? */
1700                 if (curr_prot == protcnt) {
1701                         alldone = 1;
1702                 } else if (curr_prot < protcnt) {
1703                         /* advance to next prot buffer */
1704                         sgpe = sg_next(sgpe);
1705                         bpl++;
1706
1707                         /* update the reference tag */
1708                         reftag += protgrp_blks;
1709                 } else {
1710                         /* if we're here, we have a bug */
1711                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1712                                 "9054 BLKGRD: bug in %s\n", __func__);
1713                 }
1714
1715         } while (!alldone);
1716
1717 out:
1718
1719         return num_bde;
1720 }
1721
1722 /*
1723  * Given a SCSI command that supports DIF, determine composition of protection
1724  * groups involved in setting up buffer lists
1725  *
1726  * Returns:
1727  *                            for DIF (for both read and write)
1728  * */
1729 static int
1730 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1731 {
1732         int ret = LPFC_PG_TYPE_INVALID;
1733         unsigned char op = scsi_get_prot_op(sc);
1734
1735         switch (op) {
1736         case SCSI_PROT_READ_STRIP:
1737         case SCSI_PROT_WRITE_INSERT:
1738                 ret = LPFC_PG_TYPE_NO_DIF;
1739                 break;
1740         case SCSI_PROT_READ_INSERT:
1741         case SCSI_PROT_WRITE_STRIP:
1742         case SCSI_PROT_READ_PASS:
1743         case SCSI_PROT_WRITE_PASS:
1744                 ret = LPFC_PG_TYPE_DIF_BUF;
1745                 break;
1746         default:
1747                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1748                                 "9021 Unsupported protection op:%d\n", op);
1749                 break;
1750         }
1751
1752         return ret;
1753 }
1754
1755 /*
1756  * This is the protection/DIF aware version of
1757  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1758  * two functions eventually, but for now, it's here
1759  */
1760 static int
1761 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1762                 struct lpfc_scsi_buf *lpfc_cmd)
1763 {
1764         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1765         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1766         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1767         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1768         uint32_t num_bde = 0;
1769         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1770         int prot_group_type = 0;
1771         int diflen, fcpdl;
1772         unsigned blksize;
1773
1774         /*
1775          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1776          *  fcp_rsp regions to the first data bde entry
1777          */
1778         bpl += 2;
1779         if (scsi_sg_count(scsi_cmnd)) {
1780                 /*
1781                  * The driver stores the segment count returned from pci_map_sg
1782                  * because this a count of dma-mappings used to map the use_sg
1783                  * pages.  They are not guaranteed to be the same for those
1784                  * architectures that implement an IOMMU.
1785                  */
1786                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1787                                         scsi_sglist(scsi_cmnd),
1788                                         scsi_sg_count(scsi_cmnd), datadir);
1789                 if (unlikely(!datasegcnt))
1790                         return 1;
1791
1792                 lpfc_cmd->seg_cnt = datasegcnt;
1793                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1794                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1795                                         "9067 BLKGRD: %s: Too many sg segments"
1796                                         " from dma_map_sg.  Config %d, seg_cnt"
1797                                         " %d\n",
1798                                         __func__, phba->cfg_sg_seg_cnt,
1799                                         lpfc_cmd->seg_cnt);
1800                         scsi_dma_unmap(scsi_cmnd);
1801                         return 1;
1802                 }
1803
1804                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1805
1806                 switch (prot_group_type) {
1807                 case LPFC_PG_TYPE_NO_DIF:
1808                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1809                                         datasegcnt);
1810                         /* we should have 2 or more entries in buffer list */
1811                         if (num_bde < 2)
1812                                 goto err;
1813                         break;
1814                 case LPFC_PG_TYPE_DIF_BUF:{
1815                         /*
1816                          * This type indicates that protection buffers are
1817                          * passed to the driver, so that needs to be prepared
1818                          * for DMA
1819                          */
1820                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
1821                                         scsi_prot_sglist(scsi_cmnd),
1822                                         scsi_prot_sg_count(scsi_cmnd), datadir);
1823                         if (unlikely(!protsegcnt)) {
1824                                 scsi_dma_unmap(scsi_cmnd);
1825                                 return 1;
1826                         }
1827
1828                         lpfc_cmd->prot_seg_cnt = protsegcnt;
1829                         if (lpfc_cmd->prot_seg_cnt
1830                             > phba->cfg_prot_sg_seg_cnt) {
1831                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1832                                         "9068 BLKGRD: %s: Too many prot sg "
1833                                         "segments from dma_map_sg.  Config %d,"
1834                                                 "prot_seg_cnt %d\n", __func__,
1835                                                 phba->cfg_prot_sg_seg_cnt,
1836                                                 lpfc_cmd->prot_seg_cnt);
1837                                 dma_unmap_sg(&phba->pcidev->dev,
1838                                              scsi_prot_sglist(scsi_cmnd),
1839                                              scsi_prot_sg_count(scsi_cmnd),
1840                                              datadir);
1841                                 scsi_dma_unmap(scsi_cmnd);
1842                                 return 1;
1843                         }
1844
1845                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1846                                         datasegcnt, protsegcnt);
1847                         /* we should have 3 or more entries in buffer list */
1848                         if (num_bde < 3)
1849                                 goto err;
1850                         break;
1851                 }
1852                 case LPFC_PG_TYPE_INVALID:
1853                 default:
1854                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1855                                         "9022 Unexpected protection group %i\n",
1856                                         prot_group_type);
1857                         return 1;
1858                 }
1859         }
1860
1861         /*
1862          * Finish initializing those IOCB fields that are dependent on the
1863          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
1864          * reinitialized since all iocb memory resources are used many times
1865          * for transmit, receive, and continuation bpl's.
1866          */
1867         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1868         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1869         iocb_cmd->ulpBdeCount = 1;
1870         iocb_cmd->ulpLe = 1;
1871
1872         fcpdl = scsi_bufflen(scsi_cmnd);
1873
1874         if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1875                 /*
1876                  * We are in DIF Type 1 mode
1877                  * Every data block has a 8 byte DIF (trailer)
1878                  * attached to it.  Must ajust FCP data length
1879                  */
1880                 blksize = lpfc_cmd_blksize(scsi_cmnd);
1881                 diflen = (fcpdl / blksize) * 8;
1882                 fcpdl += diflen;
1883         }
1884         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1885
1886         /*
1887          * Due to difference in data length between DIF/non-DIF paths,
1888          * we need to set word 4 of IOCB here
1889          */
1890         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1891
1892         return 0;
1893 err:
1894         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1895                         "9023 Could not setup all needed BDE's"
1896                         "prot_group_type=%d, num_bde=%d\n",
1897                         prot_group_type, num_bde);
1898         return 1;
1899 }
1900
1901 /*
1902  * This function checks for BlockGuard errors detected by
1903  * the HBA.  In case of errors, the ASC/ASCQ fields in the
1904  * sense buffer will be set accordingly, paired with
1905  * ILLEGAL_REQUEST to signal to the kernel that the HBA
1906  * detected corruption.
1907  *
1908  * Returns:
1909  *  0 - No error found
1910  *  1 - BlockGuard error found
1911  * -1 - Internal error (bad profile, ...etc)
1912  */
1913 static int
1914 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1915                         struct lpfc_iocbq *pIocbOut)
1916 {
1917         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1918         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1919         int ret = 0;
1920         uint32_t bghm = bgf->bghm;
1921         uint32_t bgstat = bgf->bgstat;
1922         uint64_t failing_sector = 0;
1923
1924         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1925                         " 0x%x lba 0x%llx blk cnt 0x%x "
1926                         "bgstat=0x%x bghm=0x%x\n",
1927                         cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1928                         blk_rq_sectors(cmd->request), bgstat, bghm);
1929
1930         spin_lock(&_dump_buf_lock);
1931         if (!_dump_buf_done) {
1932                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
1933                         " Data for %u blocks to debugfs\n",
1934                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1935                 lpfc_debug_save_data(phba, cmd);
1936
1937                 /* If we have a prot sgl, save the DIF buffer */
1938                 if (lpfc_prot_group_type(phba, cmd) ==
1939                                 LPFC_PG_TYPE_DIF_BUF) {
1940                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1941                                 "Saving DIF for %u blocks to debugfs\n",
1942                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1943                         lpfc_debug_save_dif(phba, cmd);
1944                 }
1945
1946                 _dump_buf_done = 1;
1947         }
1948         spin_unlock(&_dump_buf_lock);
1949
1950         if (lpfc_bgs_get_invalid_prof(bgstat)) {
1951                 cmd->result = ScsiResult(DID_ERROR, 0);
1952                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1953                         " BlockGuard profile. bgstat:0x%x\n",
1954                         bgstat);
1955                 ret = (-1);
1956                 goto out;
1957         }
1958
1959         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1960                 cmd->result = ScsiResult(DID_ERROR, 0);
1961                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1962                                 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1963                                 bgstat);
1964                 ret = (-1);
1965                 goto out;
1966         }
1967
1968         if (lpfc_bgs_get_guard_err(bgstat)) {
1969                 ret = 1;
1970
1971                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1972                                 0x10, 0x1);
1973                 cmd->result = DRIVER_SENSE << 24
1974                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1975                 phba->bg_guard_err_cnt++;
1976                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1977                         "9055 BLKGRD: guard_tag error\n");
1978         }
1979
1980         if (lpfc_bgs_get_reftag_err(bgstat)) {
1981                 ret = 1;
1982
1983                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1984                                 0x10, 0x3);
1985                 cmd->result = DRIVER_SENSE << 24
1986                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1987
1988                 phba->bg_reftag_err_cnt++;
1989                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1990                         "9056 BLKGRD: ref_tag error\n");
1991         }
1992
1993         if (lpfc_bgs_get_apptag_err(bgstat)) {
1994                 ret = 1;
1995
1996                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1997                                 0x10, 0x2);
1998                 cmd->result = DRIVER_SENSE << 24
1999                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
2000
2001                 phba->bg_apptag_err_cnt++;
2002                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2003                         "9061 BLKGRD: app_tag error\n");
2004         }
2005
2006         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
2007                 /*
2008                  * setup sense data descriptor 0 per SPC-4 as an information
2009                  * field, and put the failing LBA in it
2010                  */
2011                 cmd->sense_buffer[8] = 0;     /* Information */
2012                 cmd->sense_buffer[9] = 0xa;   /* Add. length */
2013                 bghm /= cmd->device->sector_size;
2014
2015                 failing_sector = scsi_get_lba(cmd);
2016                 failing_sector += bghm;
2017
2018                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
2019         }
2020
2021         if (!ret) {
2022                 /* No error was reported - problem in FW? */
2023                 cmd->result = ScsiResult(DID_ERROR, 0);
2024                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2025                         "9057 BLKGRD: no errors reported!\n");
2026         }
2027
2028 out:
2029         return ret;
2030 }
2031
2032 /**
2033  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
2034  * @phba: The Hba for which this call is being executed.
2035  * @lpfc_cmd: The scsi buffer which is going to be mapped.
2036  *
2037  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
2038  * field of @lpfc_cmd for device with SLI-4 interface spec.
2039  *
2040  * Return codes:
2041  *      1 - Error
2042  *      0 - Success
2043  **/
2044 static int
2045 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2046 {
2047         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2048         struct scatterlist *sgel = NULL;
2049         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2050         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
2051         struct sli4_sge *first_data_sgl;
2052         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2053         dma_addr_t physaddr;
2054         uint32_t num_bde = 0;
2055         uint32_t dma_len;
2056         uint32_t dma_offset = 0;
2057         int nseg;
2058         struct ulp_bde64 *bde;
2059
2060         /*
2061          * There are three possibilities here - use scatter-gather segment, use
2062          * the single mapping, or neither.  Start the lpfc command prep by
2063          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2064          * data bde entry.
2065          */
2066         if (scsi_sg_count(scsi_cmnd)) {
2067                 /*
2068                  * The driver stores the segment count returned from pci_map_sg
2069                  * because this a count of dma-mappings used to map the use_sg
2070                  * pages.  They are not guaranteed to be the same for those
2071                  * architectures that implement an IOMMU.
2072                  */
2073
2074                 nseg = scsi_dma_map(scsi_cmnd);
2075                 if (unlikely(!nseg))
2076                         return 1;
2077                 sgl += 1;
2078                 /* clear the last flag in the fcp_rsp map entry */
2079                 sgl->word2 = le32_to_cpu(sgl->word2);
2080                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2081                 sgl->word2 = cpu_to_le32(sgl->word2);
2082                 sgl += 1;
2083                 first_data_sgl = sgl;
2084                 lpfc_cmd->seg_cnt = nseg;
2085                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2086                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
2087                                 " %s: Too many sg segments from "
2088                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
2089                                 __func__, phba->cfg_sg_seg_cnt,
2090                                lpfc_cmd->seg_cnt);
2091                         scsi_dma_unmap(scsi_cmnd);
2092                         return 1;
2093                 }
2094
2095                 /*
2096                  * The driver established a maximum scatter-gather segment count
2097                  * during probe that limits the number of sg elements in any
2098                  * single scsi command.  Just run through the seg_cnt and format
2099                  * the sge's.
2100                  * When using SLI-3 the driver will try to fit all the BDEs into
2101                  * the IOCB. If it can't then the BDEs get added to a BPL as it
2102                  * does for SLI-2 mode.
2103                  */
2104                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
2105                         physaddr = sg_dma_address(sgel);
2106                         dma_len = sg_dma_len(sgel);
2107                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2108                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2109                         sgl->word2 = le32_to_cpu(sgl->word2);
2110                         if ((num_bde + 1) == nseg)
2111                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2112                         else
2113                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2114                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2115                         sgl->word2 = cpu_to_le32(sgl->word2);
2116                         sgl->sge_len = cpu_to_le32(dma_len);
2117                         dma_offset += dma_len;
2118                         sgl++;
2119                 }
2120                 /* setup the performance hint (first data BDE) if enabled */
2121                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
2122                         bde = (struct ulp_bde64 *)
2123                                         &(iocb_cmd->unsli3.sli3Words[5]);
2124                         bde->addrLow = first_data_sgl->addr_lo;
2125                         bde->addrHigh = first_data_sgl->addr_hi;
2126                         bde->tus.f.bdeSize =
2127                                         le32_to_cpu(first_data_sgl->sge_len);
2128                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2129                         bde->tus.w = cpu_to_le32(bde->tus.w);
2130                 }
2131         } else {
2132                 sgl += 1;
2133                 /* clear the last flag in the fcp_rsp map entry */
2134                 sgl->word2 = le32_to_cpu(sgl->word2);
2135                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2136                 sgl->word2 = cpu_to_le32(sgl->word2);
2137         }
2138
2139         /*
2140          * Finish initializing those IOCB fields that are dependent on the
2141          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
2142          * explicitly reinitialized.
2143          * all iocb memory resources are reused.
2144          */
2145         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
2146
2147         /*
2148          * Due to difference in data length between DIF/non-DIF paths,
2149          * we need to set word 4 of IOCB here
2150          */
2151         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
2152         return 0;
2153 }
2154
2155 /**
2156  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2157  * @phba: The Hba for which this call is being executed.
2158  * @lpfc_cmd: The scsi buffer which is going to be mapped.
2159  *
2160  * This routine wraps the actual DMA mapping function pointer from the
2161  * lpfc_hba struct.
2162  *
2163  * Return codes:
2164  *      1 - Error
2165  *      0 - Success
2166  **/
2167 static inline int
2168 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2169 {
2170         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2171 }
2172
2173 /**
2174  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2175  * @phba: Pointer to hba context object.
2176  * @vport: Pointer to vport object.
2177  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2178  * @rsp_iocb: Pointer to response iocb object which reported error.
2179  *
2180  * This function posts an event when there is a SCSI command reporting
2181  * error from the scsi device.
2182  **/
2183 static void
2184 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2185                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2186         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2187         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2188         uint32_t resp_info = fcprsp->rspStatus2;
2189         uint32_t scsi_status = fcprsp->rspStatus3;
2190         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2191         struct lpfc_fast_path_event *fast_path_evt = NULL;
2192         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2193         unsigned long flags;
2194
2195         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2196                 return;
2197
2198         /* If there is queuefull or busy condition send a scsi event */
2199         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2200                 (cmnd->result == SAM_STAT_BUSY)) {
2201                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2202                 if (!fast_path_evt)
2203                         return;
2204                 fast_path_evt->un.scsi_evt.event_type =
2205                         FC_REG_SCSI_EVENT;
2206                 fast_path_evt->un.scsi_evt.subcategory =
2207                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2208                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2209                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2210                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2211                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2212                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2213                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2214         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2215                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2216                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2217                 if (!fast_path_evt)
2218                         return;
2219                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2220                         FC_REG_SCSI_EVENT;
2221                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2222                         LPFC_EVENT_CHECK_COND;
2223                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2224                         cmnd->device->lun;
2225                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2226                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2227                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2228                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2229                 fast_path_evt->un.check_cond_evt.sense_key =
2230                         cmnd->sense_buffer[2] & 0xf;
2231                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2232                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2233         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2234                      fcpi_parm &&
2235                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2236                         ((scsi_status == SAM_STAT_GOOD) &&
2237                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2238                 /*
2239                  * If status is good or resid does not match with fcp_param and
2240                  * there is valid fcpi_parm, then there is a read_check error
2241                  */
2242                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2243                 if (!fast_path_evt)
2244                         return;
2245                 fast_path_evt->un.read_check_error.header.event_type =
2246                         FC_REG_FABRIC_EVENT;
2247                 fast_path_evt->un.read_check_error.header.subcategory =
2248                         LPFC_EVENT_FCPRDCHKERR;
2249                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2250                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2251                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2252                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2253                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2254                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2255                 fast_path_evt->un.read_check_error.fcpiparam =
2256                         fcpi_parm;
2257         } else
2258                 return;
2259
2260         fast_path_evt->vport = vport;
2261         spin_lock_irqsave(&phba->hbalock, flags);
2262         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2263         spin_unlock_irqrestore(&phba->hbalock, flags);
2264         lpfc_worker_wake_up(phba);
2265         return;
2266 }
2267
2268 /**
2269  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2270  * @phba: The HBA for which this call is being executed.
2271  * @psb: The scsi buffer which is going to be un-mapped.
2272  *
2273  * This routine does DMA un-mapping of scatter gather list of scsi command
2274  * field of @lpfc_cmd for device with SLI-3 interface spec.
2275  **/
2276 static void
2277 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2278 {
2279         /*
2280          * There are only two special cases to consider.  (1) the scsi command
2281          * requested scatter-gather usage or (2) the scsi command allocated
2282          * a request buffer, but did not request use_sg.  There is a third
2283          * case, but it does not require resource deallocation.
2284          */
2285         if (psb->seg_cnt > 0)
2286                 scsi_dma_unmap(psb->pCmd);
2287         if (psb->prot_seg_cnt > 0)
2288                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2289                                 scsi_prot_sg_count(psb->pCmd),
2290                                 psb->pCmd->sc_data_direction);
2291 }
2292
2293 /**
2294  * lpfc_handler_fcp_err - FCP response handler
2295  * @vport: The virtual port for which this call is being executed.
2296  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2297  * @rsp_iocb: The response IOCB which contains FCP error.
2298  *
2299  * This routine is called to process response IOCB with status field
2300  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2301  * based upon SCSI and FCP error.
2302  **/
2303 static void
2304 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2305                     struct lpfc_iocbq *rsp_iocb)
2306 {
2307         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2308         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2309         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2310         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2311         uint32_t resp_info = fcprsp->rspStatus2;
2312         uint32_t scsi_status = fcprsp->rspStatus3;
2313         uint32_t *lp;
2314         uint32_t host_status = DID_OK;
2315         uint32_t rsplen = 0;
2316         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2317
2318
2319         /*
2320          *  If this is a task management command, there is no
2321          *  scsi packet associated with this lpfc_cmd.  The driver
2322          *  consumes it.
2323          */
2324         if (fcpcmd->fcpCntl2) {
2325                 scsi_status = 0;
2326                 goto out;
2327         }
2328
2329         if (resp_info & RSP_LEN_VALID) {
2330                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2331                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2332                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2333                                  "2719 Invalid response length: "
2334                                  "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2335                                  cmnd->device->id,
2336                                  cmnd->device->lun, cmnd->cmnd[0],
2337                                  rsplen);
2338                         host_status = DID_ERROR;
2339                         goto out;
2340                 }
2341                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2342                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2343                                  "2757 Protocol failure detected during "
2344                                  "processing of FCP I/O op: "
2345                                  "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2346                                  cmnd->device->id,
2347                                  cmnd->device->lun, cmnd->cmnd[0],
2348                                  fcprsp->rspInfo3);
2349                         host_status = DID_ERROR;
2350                         goto out;
2351                 }
2352         }
2353
2354         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2355                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2356                 if (snslen > SCSI_SENSE_BUFFERSIZE)
2357                         snslen = SCSI_SENSE_BUFFERSIZE;
2358
2359                 if (resp_info & RSP_LEN_VALID)
2360                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
2361                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2362         }
2363         lp = (uint32_t *)cmnd->sense_buffer;
2364
2365         if (!scsi_status && (resp_info & RESID_UNDER))
2366                 logit = LOG_FCP;
2367
2368         lpfc_printf_vlog(vport, KERN_WARNING, logit,
2369                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
2370                          "Data: x%x x%x x%x x%x x%x\n",
2371                          cmnd->cmnd[0], scsi_status,
2372                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2373                          be32_to_cpu(fcprsp->rspResId),
2374                          be32_to_cpu(fcprsp->rspSnsLen),
2375                          be32_to_cpu(fcprsp->rspRspLen),
2376                          fcprsp->rspInfo3);
2377
2378         scsi_set_resid(cmnd, 0);
2379         if (resp_info & RESID_UNDER) {
2380                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2381
2382                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2383                                  "9025 FCP Read Underrun, expected %d, "
2384                                  "residual %d Data: x%x x%x x%x\n",
2385                                  be32_to_cpu(fcpcmd->fcpDl),
2386                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2387                                  cmnd->underflow);
2388
2389                 /*
2390                  * If there is an under run check if under run reported by
2391                  * storage array is same as the under run reported by HBA.
2392                  * If this is not same, there is a dropped frame.
2393                  */
2394                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2395                         fcpi_parm &&
2396                         (scsi_get_resid(cmnd) != fcpi_parm)) {
2397                         lpfc_printf_vlog(vport, KERN_WARNING,
2398                                          LOG_FCP | LOG_FCP_ERROR,
2399                                          "9026 FCP Read Check Error "
2400                                          "and Underrun Data: x%x x%x x%x x%x\n",
2401                                          be32_to_cpu(fcpcmd->fcpDl),
2402                                          scsi_get_resid(cmnd), fcpi_parm,
2403                                          cmnd->cmnd[0]);
2404                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2405                         host_status = DID_ERROR;
2406                 }
2407                 /*
2408                  * The cmnd->underflow is the minimum number of bytes that must
2409                  * be transferred for this command.  Provided a sense condition
2410                  * is not present, make sure the actual amount transferred is at
2411                  * least the underflow value or fail.
2412                  */
2413                 if (!(resp_info & SNS_LEN_VALID) &&
2414                     (scsi_status == SAM_STAT_GOOD) &&
2415                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2416                      < cmnd->underflow)) {
2417                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2418                                          "9027 FCP command x%x residual "
2419                                          "underrun converted to error "
2420                                          "Data: x%x x%x x%x\n",
2421                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
2422                                          scsi_get_resid(cmnd), cmnd->underflow);
2423                         host_status = DID_ERROR;
2424                 }
2425         } else if (resp_info & RESID_OVER) {
2426                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2427                                  "9028 FCP command x%x residual overrun error. "
2428                                  "Data: x%x x%x\n", cmnd->cmnd[0],
2429                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2430                 host_status = DID_ERROR;
2431
2432         /*
2433          * Check SLI validation that all the transfer was actually done
2434          * (fcpi_parm should be zero). Apply check only to reads.
2435          */
2436         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2437                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2438                                  "9029 FCP Read Check Error Data: "
2439                                  "x%x x%x x%x x%x x%x\n",
2440                                  be32_to_cpu(fcpcmd->fcpDl),
2441                                  be32_to_cpu(fcprsp->rspResId),
2442                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
2443                 switch (scsi_status) {
2444                 case SAM_STAT_GOOD:
2445                 case SAM_STAT_CHECK_CONDITION:
2446                         /* Fabric dropped a data frame. Fail any successful
2447                          * command in which we detected dropped frames.
2448                          * A status of good or some check conditions could
2449                          * be considered a successful command.
2450                          */
2451                         host_status = DID_ERROR;
2452                         break;
2453                 }
2454                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2455         }
2456
2457  out:
2458         cmnd->result = ScsiResult(host_status, scsi_status);
2459         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2460 }
2461
2462 /**
2463  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2464  * @phba: The Hba for which this call is being executed.
2465  * @pIocbIn: The command IOCBQ for the scsi cmnd.
2466  * @pIocbOut: The response IOCBQ for the scsi cmnd.
2467  *
2468  * This routine assigns scsi command result by looking into response IOCB
2469  * status field appropriately. This routine handles QUEUE FULL condition as
2470  * well by ramping down device queue depth.
2471  **/
2472 static void
2473 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2474                         struct lpfc_iocbq *pIocbOut)
2475 {
2476         struct lpfc_scsi_buf *lpfc_cmd =
2477                 (struct lpfc_scsi_buf *) pIocbIn->context1;
2478         struct lpfc_vport      *vport = pIocbIn->vport;
2479         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2480         struct lpfc_nodelist *pnode = rdata->pnode;
2481         struct scsi_cmnd *cmd;
2482         int result;
2483         struct scsi_device *tmp_sdev;
2484         int depth;
2485         unsigned long flags;
2486         struct lpfc_fast_path_event *fast_path_evt;
2487         struct Scsi_Host *shost;
2488         uint32_t queue_depth, scsi_id;
2489
2490         /* Sanity check on return of outstanding command */
2491         if (!(lpfc_cmd->pCmd))
2492                 return;
2493         cmd = lpfc_cmd->pCmd;
2494         shost = cmd->device->host;
2495
2496         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2497         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2498         /* pick up SLI4 exhange busy status from HBA */
2499         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2500
2501         if (pnode && NLP_CHK_NODE_ACT(pnode))
2502                 atomic_dec(&pnode->cmd_pending);
2503
2504         if (lpfc_cmd->status) {
2505                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2506                     (lpfc_cmd->result & IOERR_DRVR_MASK))
2507                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2508                 else if (lpfc_cmd->status >= IOSTAT_CNT)
2509                         lpfc_cmd->status = IOSTAT_DEFAULT;
2510
2511                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2512                                  "9030 FCP cmd x%x failed <%d/%d> "
2513                                  "status: x%x result: x%x Data: x%x x%x\n",
2514                                  cmd->cmnd[0],
2515                                  cmd->device ? cmd->device->id : 0xffff,
2516                                  cmd->device ? cmd->device->lun : 0xffff,
2517                                  lpfc_cmd->status, lpfc_cmd->result,
2518                                  pIocbOut->iocb.ulpContext,
2519                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2520
2521                 switch (lpfc_cmd->status) {
2522                 case IOSTAT_FCP_RSP_ERROR:
2523                         /* Call FCP RSP handler to determine result */
2524                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2525                         break;
2526                 case IOSTAT_NPORT_BSY:
2527                 case IOSTAT_FABRIC_BSY:
2528                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2529                         fast_path_evt = lpfc_alloc_fast_evt(phba);
2530                         if (!fast_path_evt)
2531                                 break;
2532                         fast_path_evt->un.fabric_evt.event_type =
2533                                 FC_REG_FABRIC_EVENT;
2534                         fast_path_evt->un.fabric_evt.subcategory =
2535                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2536                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2537                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2538                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2539                                         &pnode->nlp_portname,
2540                                         sizeof(struct lpfc_name));
2541                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2542                                         &pnode->nlp_nodename,
2543                                         sizeof(struct lpfc_name));
2544                         }
2545                         fast_path_evt->vport = vport;
2546                         fast_path_evt->work_evt.evt =
2547                                 LPFC_EVT_FASTPATH_MGMT_EVT;
2548                         spin_lock_irqsave(&phba->hbalock, flags);
2549                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
2550                                 &phba->work_list);
2551                         spin_unlock_irqrestore(&phba->hbalock, flags);
2552                         lpfc_worker_wake_up(phba);
2553                         break;
2554                 case IOSTAT_LOCAL_REJECT:
2555                 case IOSTAT_REMOTE_STOP:
2556                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
2557                             lpfc_cmd->result ==
2558                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
2559                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
2560                             lpfc_cmd->result ==
2561                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
2562                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
2563                                 break;
2564                         }
2565                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2566                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
2567                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2568                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2569                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
2570                                 break;
2571                         }
2572                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2573                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2574                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2575                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2576                                         /*
2577                                          * This is a response for a BG enabled
2578                                          * cmd. Parse BG error
2579                                          */
2580                                         lpfc_parse_bg_err(phba, lpfc_cmd,
2581                                                         pIocbOut);
2582                                         break;
2583                                 } else {
2584                                         lpfc_printf_vlog(vport, KERN_WARNING,
2585                                                         LOG_BG,
2586                                                         "9031 non-zero BGSTAT "
2587                                                         "on unprotected cmd\n");
2588                                 }
2589                         }
2590                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
2591                                 && (phba->sli_rev == LPFC_SLI_REV4)
2592                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
2593                                 /* This IO was aborted by the target, we don't
2594                                  * know the rxid and because we did not send the
2595                                  * ABTS we cannot generate and RRQ.
2596                                  */
2597                                 lpfc_set_rrq_active(phba, pnode,
2598                                                 lpfc_cmd->cur_iocbq.sli4_xritag,
2599                                                 0, 0);
2600                         }
2601                 /* else: fall through */
2602                 default:
2603                         cmd->result = ScsiResult(DID_ERROR, 0);
2604                         break;
2605                 }
2606
2607                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2608                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2609                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2610                                                  SAM_STAT_BUSY);
2611         } else
2612                 cmd->result = ScsiResult(DID_OK, 0);
2613
2614         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2615                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2616
2617                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2618                                  "0710 Iodone <%d/%d> cmd %p, error "
2619                                  "x%x SNS x%x x%x Data: x%x x%x\n",
2620                                  cmd->device->id, cmd->device->lun, cmd,
2621                                  cmd->result, *lp, *(lp + 3), cmd->retries,
2622                                  scsi_get_resid(cmd));
2623         }
2624
2625         lpfc_update_stats(phba, lpfc_cmd);
2626         result = cmd->result;
2627         if (vport->cfg_max_scsicmpl_time &&
2628            time_after(jiffies, lpfc_cmd->start_time +
2629                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2630                 spin_lock_irqsave(shost->host_lock, flags);
2631                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2632                         if (pnode->cmd_qdepth >
2633                                 atomic_read(&pnode->cmd_pending) &&
2634                                 (atomic_read(&pnode->cmd_pending) >
2635                                 LPFC_MIN_TGT_QDEPTH) &&
2636                                 ((cmd->cmnd[0] == READ_10) ||
2637                                 (cmd->cmnd[0] == WRITE_10)))
2638                                 pnode->cmd_qdepth =
2639                                         atomic_read(&pnode->cmd_pending);
2640
2641                         pnode->last_change_time = jiffies;
2642                 }
2643                 spin_unlock_irqrestore(shost->host_lock, flags);
2644         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2645                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2646                    time_after(jiffies, pnode->last_change_time +
2647                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2648                         spin_lock_irqsave(shost->host_lock, flags);
2649                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2650                                 / 100;
2651                         depth = depth ? depth : 1;
2652                         pnode->cmd_qdepth += depth;
2653                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2654                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2655                         pnode->last_change_time = jiffies;
2656                         spin_unlock_irqrestore(shost->host_lock, flags);
2657                 }
2658         }
2659
2660         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2661
2662         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2663         queue_depth = cmd->device->queue_depth;
2664         scsi_id = cmd->device->id;
2665         cmd->scsi_done(cmd);
2666
2667         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2668                 /*
2669                  * If there is a thread waiting for command completion
2670                  * wake up the thread.
2671                  */
2672                 spin_lock_irqsave(shost->host_lock, flags);
2673                 lpfc_cmd->pCmd = NULL;
2674                 if (lpfc_cmd->waitq)
2675                         wake_up(lpfc_cmd->waitq);
2676                 spin_unlock_irqrestore(shost->host_lock, flags);
2677                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2678                 return;
2679         }
2680
2681         if (!result)
2682                 lpfc_rampup_queue_depth(vport, queue_depth);
2683
2684         /*
2685          * Check for queue full.  If the lun is reporting queue full, then
2686          * back off the lun queue depth to prevent target overloads.
2687          */
2688         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2689             NLP_CHK_NODE_ACT(pnode)) {
2690                 shost_for_each_device(tmp_sdev, shost) {
2691                         if (tmp_sdev->id != scsi_id)
2692                                 continue;
2693                         depth = scsi_track_queue_full(tmp_sdev,
2694                                                       tmp_sdev->queue_depth-1);
2695                         if (depth <= 0)
2696                                 continue;
2697                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2698                                          "0711 detected queue full - lun queue "
2699                                          "depth adjusted to %d.\n", depth);
2700                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
2701                                                                pnode,
2702                                                                tmp_sdev->lun,
2703                                                                depth+1, depth);
2704                 }
2705         }
2706
2707         /*
2708          * If there is a thread waiting for command completion
2709          * wake up the thread.
2710          */
2711         spin_lock_irqsave(shost->host_lock, flags);
2712         lpfc_cmd->pCmd = NULL;
2713         if (lpfc_cmd->waitq)
2714                 wake_up(lpfc_cmd->waitq);
2715         spin_unlock_irqrestore(shost->host_lock, flags);
2716
2717         lpfc_release_scsi_buf(phba, lpfc_cmd);
2718 }
2719
2720 /**
2721  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2722  * @data: A pointer to the immediate command data portion of the IOCB.
2723  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2724  *
2725  * The routine copies the entire FCP command from @fcp_cmnd to @data while
2726  * byte swapping the data to big endian format for transmission on the wire.
2727  **/
2728 static void
2729 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2730 {
2731         int i, j;
2732         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2733              i += sizeof(uint32_t), j++) {
2734                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2735         }
2736 }
2737
2738 /**
2739  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2740  * @vport: The virtual port for which this call is being executed.
2741  * @lpfc_cmd: The scsi command which needs to send.
2742  * @pnode: Pointer to lpfc_nodelist.
2743  *
2744  * This routine initializes fcp_cmnd and iocb data structure from scsi command
2745  * to transfer for device with SLI3 interface spec.
2746  **/
2747 static void
2748 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2749                     struct lpfc_nodelist *pnode)
2750 {
2751         struct lpfc_hba *phba = vport->phba;
2752         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2753         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2754         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2755         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2756         int datadir = scsi_cmnd->sc_data_direction;
2757         char tag[2];
2758
2759         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2760                 return;
2761
2762         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2763         /* clear task management bits */
2764         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2765
2766         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2767                         &lpfc_cmd->fcp_cmnd->fcp_lun);
2768
2769         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2770
2771         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2772                 switch (tag[0]) {
2773                 case HEAD_OF_QUEUE_TAG:
2774                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2775                         break;
2776                 case ORDERED_QUEUE_TAG:
2777                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
2778                         break;
2779                 default:
2780                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2781                         break;
2782                 }
2783         } else
2784                 fcp_cmnd->fcpCntl1 = 0;
2785
2786         /*
2787          * There are three possibilities here - use scatter-gather segment, use
2788          * the single mapping, or neither.  Start the lpfc command prep by
2789          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2790          * data bde entry.
2791          */
2792         if (scsi_sg_count(scsi_cmnd)) {
2793                 if (datadir == DMA_TO_DEVICE) {
2794                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2795                         if (phba->sli_rev < LPFC_SLI_REV4) {
2796                                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2797                                 iocb_cmd->ulpPU = 0;
2798                         } else
2799                                 iocb_cmd->ulpPU = PARM_READ_CHECK;
2800                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
2801                         phba->fc4OutputRequests++;
2802                 } else {
2803                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2804                         iocb_cmd->ulpPU = PARM_READ_CHECK;
2805                         fcp_cmnd->fcpCntl3 = READ_DATA;
2806                         phba->fc4InputRequests++;
2807                 }
2808         } else {
2809                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2810                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2811                 iocb_cmd->ulpPU = 0;
2812                 fcp_cmnd->fcpCntl3 = 0;
2813                 phba->fc4ControlRequests++;
2814         }
2815         if (phba->sli_rev == 3 &&
2816             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2817                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2818         /*
2819          * Finish initializing those IOCB fields that are independent
2820          * of the scsi_cmnd request_buffer
2821          */
2822         piocbq->iocb.ulpContext = pnode->nlp_rpi;
2823         if (phba->sli_rev == LPFC_SLI_REV4)
2824                 piocbq->iocb.ulpContext =
2825                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
2826         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2827                 piocbq->iocb.ulpFCP2Rcvy = 1;
2828         else
2829                 piocbq->iocb.ulpFCP2Rcvy = 0;
2830
2831         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2832         piocbq->context1  = lpfc_cmd;
2833         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2834         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2835         piocbq->vport = vport;
2836 }
2837
2838 /**
2839  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
2840  * @vport: The virtual port for which this call is being executed.
2841  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2842  * @lun: Logical unit number.
2843  * @task_mgmt_cmd: SCSI task management command.
2844  *
2845  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2846  * for device with SLI-3 interface spec.
2847  *
2848  * Return codes:
2849  *   0 - Error
2850  *   1 - Success
2851  **/
2852 static int
2853 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2854                              struct lpfc_scsi_buf *lpfc_cmd,
2855                              unsigned int lun,
2856                              uint8_t task_mgmt_cmd)
2857 {
2858         struct lpfc_iocbq *piocbq;
2859         IOCB_t *piocb;
2860         struct fcp_cmnd *fcp_cmnd;
2861         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2862         struct lpfc_nodelist *ndlp = rdata->pnode;
2863
2864         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2865             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2866                 return 0;
2867
2868         piocbq = &(lpfc_cmd->cur_iocbq);
2869         piocbq->vport = vport;
2870
2871         piocb = &piocbq->iocb;
2872
2873         fcp_cmnd = lpfc_cmd->fcp_cmnd;
2874         /* Clear out any old data in the FCP command area */
2875         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2876         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2877         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2878         if (vport->phba->sli_rev == 3 &&
2879             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2880                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2881         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2882         piocb->ulpContext = ndlp->nlp_rpi;
2883         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
2884                 piocb->ulpContext =
2885                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
2886         }
2887         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2888                 piocb->ulpFCP2Rcvy = 1;
2889         }
2890         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2891
2892         /* ulpTimeout is only one byte */
2893         if (lpfc_cmd->timeout > 0xff) {
2894                 /*
2895                  * Do not timeout the command at the firmware level.
2896                  * The driver will provide the timeout mechanism.
2897                  */
2898                 piocb->ulpTimeout = 0;
2899         } else
2900                 piocb->ulpTimeout = lpfc_cmd->timeout;
2901
2902         if (vport->phba->sli_rev == LPFC_SLI_REV4)
2903                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2904
2905         return 1;
2906 }
2907
2908 /**
2909  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
2910  * @phba: The hba struct for which this call is being executed.
2911  * @dev_grp: The HBA PCI-Device group number.
2912  *
2913  * This routine sets up the SCSI interface API function jump table in @phba
2914  * struct.
2915  * Returns: 0 - success, -ENODEV - failure.
2916  **/
2917 int
2918 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2919 {
2920
2921         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2922         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2923
2924         switch (dev_grp) {
2925         case LPFC_PCI_DEV_LP:
2926                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2927                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2928                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2929                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
2930                 break;
2931         case LPFC_PCI_DEV_OC:
2932                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2933                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2934                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2935                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
2936                 break;
2937         default:
2938                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2939                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
2940                                 dev_grp);
2941                 return -ENODEV;
2942                 break;
2943         }
2944         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2945         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2946         return 0;
2947 }
2948
2949 /**
2950  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2951  * @phba: The Hba for which this call is being executed.
2952  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2953  * @rspiocbq: Pointer to lpfc_iocbq data structure.
2954  *
2955  * This routine is IOCB completion routine for device reset and target reset
2956  * routine. This routine release scsi buffer associated with lpfc_cmd.
2957  **/
2958 static void
2959 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2960                         struct lpfc_iocbq *cmdiocbq,
2961                         struct lpfc_iocbq *rspiocbq)
2962 {
2963         struct lpfc_scsi_buf *lpfc_cmd =
2964                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2965         if (lpfc_cmd)
2966                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2967         return;
2968 }
2969
2970 /**
2971  * lpfc_info - Info entry point of scsi_host_template data structure
2972  * @host: The scsi host for which this call is being executed.
2973  *
2974  * This routine provides module information about hba.
2975  *
2976  * Reutrn code:
2977  *   Pointer to char - Success.
2978  **/
2979 const char *
2980 lpfc_info(struct Scsi_Host *host)
2981 {
2982         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2983         struct lpfc_hba   *phba = vport->phba;
2984         int len;
2985         static char  lpfcinfobuf[384];
2986
2987         memset(lpfcinfobuf,0,384);
2988         if (phba && phba->pcidev){
2989                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2990                 len = strlen(lpfcinfobuf);
2991                 snprintf(lpfcinfobuf + len,
2992                         384-len,
2993                         " on PCI bus %02x device %02x irq %d",
2994                         phba->pcidev->bus->number,
2995                         phba->pcidev->devfn,
2996                         phba->pcidev->irq);
2997                 len = strlen(lpfcinfobuf);
2998                 if (phba->Port[0]) {
2999                         snprintf(lpfcinfobuf + len,
3000                                  384-len,
3001                                  " port %s",
3002                                  phba->Port);
3003                 }
3004                 len = strlen(lpfcinfobuf);
3005                 if (phba->sli4_hba.link_state.logical_speed) {
3006                         snprintf(lpfcinfobuf + len,
3007                                  384-len,
3008                                  " Logical Link Speed: %d Mbps",
3009                                  phba->sli4_hba.link_state.logical_speed * 10);
3010                 }
3011         }
3012         return lpfcinfobuf;
3013 }
3014
3015 /**
3016  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
3017  * @phba: The Hba for which this call is being executed.
3018  *
3019  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
3020  * The default value of cfg_poll_tmo is 10 milliseconds.
3021  **/
3022 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
3023 {
3024         unsigned long  poll_tmo_expires =
3025                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
3026
3027         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
3028                 mod_timer(&phba->fcp_poll_timer,
3029                           poll_tmo_expires);
3030 }
3031
3032 /**
3033  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
3034  * @phba: The Hba for which this call is being executed.
3035  *
3036  * This routine starts the fcp_poll_timer of @phba.
3037  **/
3038 void lpfc_poll_start_timer(struct lpfc_hba * phba)
3039 {
3040         lpfc_poll_rearm_timer(phba);
3041 }
3042
3043 /**
3044  * lpfc_poll_timeout - Restart polling timer
3045  * @ptr: Map to lpfc_hba data structure pointer.
3046  *
3047  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
3048  * and FCP Ring interrupt is disable.
3049  **/
3050
3051 void lpfc_poll_timeout(unsigned long ptr)
3052 {
3053         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
3054
3055         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3056                 lpfc_sli_handle_fast_ring_event(phba,
3057                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3058
3059                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3060                         lpfc_poll_rearm_timer(phba);
3061         }
3062 }
3063
3064 /**
3065  * lpfc_queuecommand - scsi_host_template queuecommand entry point
3066  * @cmnd: Pointer to scsi_cmnd data structure.
3067  * @done: Pointer to done routine.
3068  *
3069  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
3070  * This routine prepares an IOCB from scsi command and provides to firmware.
3071  * The @done callback is invoked after driver finished processing the command.
3072  *
3073  * Return value :
3074  *   0 - Success
3075  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
3076  **/
3077 static int
3078 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
3079 {
3080         struct Scsi_Host  *shost = cmnd->device->host;
3081         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3082         struct lpfc_hba   *phba = vport->phba;
3083         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3084         struct lpfc_nodelist *ndlp;
3085         struct lpfc_scsi_buf *lpfc_cmd;
3086         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3087         int err;
3088
3089         err = fc_remote_port_chkready(rport);
3090         if (err) {
3091                 cmnd->result = err;
3092                 goto out_fail_command;
3093         }
3094         ndlp = rdata->pnode;
3095
3096         if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
3097                 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3098
3099                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
3100                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
3101                                 " op:%02x str=%s without registering for"
3102                                 " BlockGuard - Rejecting command\n",
3103                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3104                                 dif_op_str[scsi_get_prot_op(cmnd)]);
3105                 goto out_fail_command;
3106         }
3107
3108         /*
3109          * Catch race where our node has transitioned, but the
3110          * transport is still transitioning.
3111          */
3112         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
3113                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
3114                 goto out_fail_command;
3115         }
3116         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
3117                 goto out_tgt_busy;
3118
3119         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
3120         if (lpfc_cmd == NULL) {
3121                 lpfc_rampdown_queue_depth(phba);
3122
3123                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3124                                  "0707 driver's buffer pool is empty, "
3125                                  "IO busied\n");
3126                 goto out_host_busy;
3127         }
3128
3129         /*
3130          * Store the midlayer's command structure for the completion phase
3131          * and complete the command initialization.
3132          */
3133         lpfc_cmd->pCmd  = cmnd;
3134         lpfc_cmd->rdata = rdata;
3135         lpfc_cmd->timeout = 0;
3136         lpfc_cmd->start_time = jiffies;
3137         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
3138         cmnd->scsi_done = done;
3139
3140         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3141                 if (vport->phba->cfg_enable_bg) {
3142                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3143                                 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
3144                                 "str=%s\n",
3145                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3146                                 dif_op_str[scsi_get_prot_op(cmnd)]);
3147                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3148                                 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
3149                                 "%02x %02x %02x %02x %02x\n",
3150                                 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
3151                                 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
3152                                 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
3153                                 cmnd->cmnd[9]);
3154                         if (cmnd->cmnd[0] == READ_10)
3155                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3156                                         "9035 BLKGRD: READ @ sector %llu, "
3157                                         "count %u\n",
3158                                         (unsigned long long)scsi_get_lba(cmnd),
3159                                         blk_rq_sectors(cmnd->request));
3160                         else if (cmnd->cmnd[0] == WRITE_10)
3161                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3162                                         "9036 BLKGRD: WRITE @ sector %llu, "
3163                                         "count %u cmd=%p\n",
3164                                         (unsigned long long)scsi_get_lba(cmnd),
3165                                         blk_rq_sectors(cmnd->request),
3166                                         cmnd);
3167                 }
3168
3169                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3170         } else {
3171                 if (vport->phba->cfg_enable_bg) {
3172                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3173                                         "9038 BLKGRD: rcvd unprotected cmd:"
3174                                         "%02x op:%02x str=%s\n",
3175                                         cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3176                                         dif_op_str[scsi_get_prot_op(cmnd)]);
3177                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3178                                         "9039 BLKGRD: CDB: %02x %02x %02x "
3179                                         "%02x %02x %02x %02x %02x %02x %02x\n",
3180                                         cmnd->cmnd[0], cmnd->cmnd[1],
3181                                         cmnd->cmnd[2], cmnd->cmnd[3],
3182                                         cmnd->cmnd[4], cmnd->cmnd[5],
3183                                         cmnd->cmnd[6], cmnd->cmnd[7],
3184                                         cmnd->cmnd[8], cmnd->cmnd[9]);
3185                         if (cmnd->cmnd[0] == READ_10)
3186                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3187                                         "9040 dbg: READ @ sector %llu, "
3188                                         "count %u\n",
3189                                         (unsigned long long)scsi_get_lba(cmnd),
3190                                          blk_rq_sectors(cmnd->request));
3191                         else if (cmnd->cmnd[0] == WRITE_10)
3192                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3193                                          "9041 dbg: WRITE @ sector %llu, "
3194                                          "count %u cmd=%p\n",
3195                                          (unsigned long long)scsi_get_lba(cmnd),
3196                                          blk_rq_sectors(cmnd->request), cmnd);
3197                         else
3198                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3199                                          "9042 dbg: parser not implemented\n");
3200                 }
3201                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3202         }
3203
3204         if (err)
3205                 goto out_host_busy_free_buf;
3206
3207         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
3208
3209         atomic_inc(&ndlp->cmd_pending);
3210         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3211                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3212         if (err) {
3213                 atomic_dec(&ndlp->cmd_pending);
3214                 goto out_host_busy_free_buf;
3215         }
3216         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3217                 spin_unlock(shost->host_lock);
3218                 lpfc_sli_handle_fast_ring_event(phba,
3219                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3220
3221                 spin_lock(shost->host_lock);
3222                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3223                         lpfc_poll_rearm_timer(phba);
3224         }
3225
3226         return 0;
3227
3228  out_host_busy_free_buf:
3229         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3230         lpfc_release_scsi_buf(phba, lpfc_cmd);
3231  out_host_busy:
3232         return SCSI_MLQUEUE_HOST_BUSY;
3233
3234  out_tgt_busy:
3235         return SCSI_MLQUEUE_TARGET_BUSY;
3236
3237  out_fail_command:
3238         done(cmnd);
3239         return 0;
3240 }
3241
3242 static DEF_SCSI_QCMD(lpfc_queuecommand)
3243
3244 /**
3245  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3246  * @cmnd: Pointer to scsi_cmnd data structure.
3247  *
3248  * This routine aborts @cmnd pending in base driver.
3249  *
3250  * Return code :
3251  *   0x2003 - Error
3252  *   0x2002 - Success
3253  **/
3254 static int
3255 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3256 {
3257         struct Scsi_Host  *shost = cmnd->device->host;
3258         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3259         struct lpfc_hba   *phba = vport->phba;
3260         struct lpfc_iocbq *iocb;
3261         struct lpfc_iocbq *abtsiocb;
3262         struct lpfc_scsi_buf *lpfc_cmd;
3263         IOCB_t *cmd, *icmd;
3264         int ret = SUCCESS;
3265         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3266
3267         ret = fc_block_scsi_eh(cmnd);
3268         if (ret)
3269                 return ret;
3270         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3271         if (!lpfc_cmd) {
3272                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3273                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
3274                          "x%x ID %d LUN %d\n",
3275                          ret, cmnd->device->id, cmnd->device->lun);
3276                 return SUCCESS;
3277         }
3278
3279         /*
3280          * If pCmd field of the corresponding lpfc_scsi_buf structure
3281          * points to a different SCSI command, then the driver has
3282          * already completed this command, but the midlayer did not
3283          * see the completion before the eh fired.  Just return
3284          * SUCCESS.
3285          */
3286         iocb = &lpfc_cmd->cur_iocbq;
3287         if (lpfc_cmd->pCmd != cmnd)
3288                 goto out;
3289
3290         BUG_ON(iocb->context1 != lpfc_cmd);
3291
3292         abtsiocb = lpfc_sli_get_iocbq(phba);
3293         if (abtsiocb == NULL) {
3294                 ret = FAILED;
3295                 goto out;
3296         }
3297
3298         /*
3299          * The scsi command can not be in txq and it is in flight because the
3300          * pCmd is still pointig at the SCSI command we have to abort. There
3301          * is no need to search the txcmplq. Just send an abort to the FW.
3302          */
3303
3304         cmd = &iocb->iocb;
3305         icmd = &abtsiocb->iocb;
3306         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3307         icmd->un.acxri.abortContextTag = cmd->ulpContext;
3308         if (phba->sli_rev == LPFC_SLI_REV4)
3309                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3310         else
3311                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3312
3313         icmd->ulpLe = 1;
3314         icmd->ulpClass = cmd->ulpClass;
3315
3316         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3317         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3318         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3319
3320         if (lpfc_is_link_up(phba))
3321                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3322         else
3323                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3324
3325         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3326         abtsiocb->vport = vport;
3327         if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3328             IOCB_ERROR) {
3329                 lpfc_sli_release_iocbq(phba, abtsiocb);
3330                 ret = FAILED;
3331                 goto out;
3332         }
3333
3334         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3335                 lpfc_sli_handle_fast_ring_event(phba,
3336                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3337
3338         lpfc_cmd->waitq = &waitq;
3339         /* Wait for abort to complete */
3340         wait_event_timeout(waitq,
3341                           (lpfc_cmd->pCmd != cmnd),
3342                            (2*vport->cfg_devloss_tmo*HZ));
3343
3344         spin_lock_irq(shost->host_lock);
3345         lpfc_cmd->waitq = NULL;
3346         spin_unlock_irq(shost->host_lock);
3347
3348         if (lpfc_cmd->pCmd == cmnd) {
3349                 ret = FAILED;
3350                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3351                                  "0748 abort handler timed out waiting "
3352                                  "for abort to complete: ret %#x, ID %d, "
3353                                  "LUN %d\n",
3354                                  ret, cmnd->device->id, cmnd->device->lun);
3355         }
3356
3357  out:
3358         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3359                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3360                          "LUN %d\n", ret, cmnd->device->id,
3361                          cmnd->device->lun);
3362         return ret;
3363 }
3364
3365 static char *
3366 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3367 {
3368         switch (task_mgmt_cmd) {
3369         case FCP_ABORT_TASK_SET:
3370                 return "ABORT_TASK_SET";
3371         case FCP_CLEAR_TASK_SET:
3372                 return "FCP_CLEAR_TASK_SET";
3373         case FCP_BUS_RESET:
3374                 return "FCP_BUS_RESET";
3375         case FCP_LUN_RESET:
3376                 return "FCP_LUN_RESET";
3377         case FCP_TARGET_RESET:
3378                 return "FCP_TARGET_RESET";
3379         case FCP_CLEAR_ACA:
3380                 return "FCP_CLEAR_ACA";
3381         case FCP_TERMINATE_TASK:
3382                 return "FCP_TERMINATE_TASK";
3383         default:
3384                 return "unknown";
3385         }
3386 }
3387
3388 /**
3389  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3390  * @vport: The virtual port for which this call is being executed.
3391  * @rdata: Pointer to remote port local data
3392  * @tgt_id: Target ID of remote device.
3393  * @lun_id: Lun number for the TMF
3394  * @task_mgmt_cmd: type of TMF to send
3395  *
3396  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3397  * a remote port.
3398  *
3399  * Return Code:
3400  *   0x2003 - Error
3401  *   0x2002 - Success.
3402  **/
3403 static int
3404 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3405                     unsigned  tgt_id, unsigned int lun_id,
3406                     uint8_t task_mgmt_cmd)
3407 {
3408         struct lpfc_hba   *phba = vport->phba;
3409         struct lpfc_scsi_buf *lpfc_cmd;
3410         struct lpfc_iocbq *iocbq;
3411         struct lpfc_iocbq *iocbqrsp;
3412         struct lpfc_nodelist *pnode = rdata->pnode;
3413         int ret;
3414         int status;
3415
3416         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3417                 return FAILED;
3418
3419         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
3420         if (lpfc_cmd == NULL)
3421                 return FAILED;
3422         lpfc_cmd->timeout = 60;
3423         lpfc_cmd->rdata = rdata;
3424
3425         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3426                                            task_mgmt_cmd);
3427         if (!status) {
3428                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3429                 return FAILED;
3430         }
3431
3432         iocbq = &lpfc_cmd->cur_iocbq;
3433         iocbqrsp = lpfc_sli_get_iocbq(phba);
3434         if (iocbqrsp == NULL) {
3435                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3436                 return FAILED;
3437         }
3438
3439         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3440                          "0702 Issue %s to TGT %d LUN %d "
3441                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
3442                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3443                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
3444                          iocbq->iocb_flag);
3445
3446         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3447                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
3448         if (status != IOCB_SUCCESS) {
3449                 if (status == IOCB_TIMEDOUT) {
3450                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3451                         ret = TIMEOUT_ERROR;
3452                 } else
3453                         ret = FAILED;
3454                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3455                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3456                          "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
3457                          "iocb_flag x%x\n",
3458                          lpfc_taskmgmt_name(task_mgmt_cmd),
3459                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3460                          iocbqrsp->iocb.un.ulpWord[4],
3461                          iocbq->iocb_flag);
3462         } else if (status == IOCB_BUSY)
3463                 ret = FAILED;
3464         else
3465                 ret = SUCCESS;
3466
3467         lpfc_sli_release_iocbq(phba, iocbqrsp);
3468
3469         if (ret != TIMEOUT_ERROR)
3470                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3471
3472         return ret;
3473 }
3474
3475 /**
3476  * lpfc_chk_tgt_mapped -
3477  * @vport: The virtual port to check on
3478  * @cmnd: Pointer to scsi_cmnd data structure.
3479  *
3480  * This routine delays until the scsi target (aka rport) for the
3481  * command exists (is present and logged in) or we declare it non-existent.
3482  *
3483  * Return code :
3484  *  0x2003 - Error
3485  *  0x2002 - Success
3486  **/
3487 static int
3488 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3489 {
3490         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3491         struct lpfc_nodelist *pnode;
3492         unsigned long later;
3493
3494         if (!rdata) {
3495                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3496                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3497                 return FAILED;
3498         }
3499         pnode = rdata->pnode;
3500         /*
3501          * If target is not in a MAPPED state, delay until
3502          * target is rediscovered or devloss timeout expires.
3503          */
3504         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3505         while (time_after(later, jiffies)) {
3506                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3507                         return FAILED;
3508                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3509                         return SUCCESS;
3510                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3511                 rdata = cmnd->device->hostdata;
3512                 if (!rdata)
3513                         return FAILED;
3514                 pnode = rdata->pnode;
3515         }
3516         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3517             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3518                 return FAILED;
3519         return SUCCESS;
3520 }
3521
3522 /**
3523  * lpfc_reset_flush_io_context -
3524  * @vport: The virtual port (scsi_host) for the flush context
3525  * @tgt_id: If aborting by Target contect - specifies the target id
3526  * @lun_id: If aborting by Lun context - specifies the lun id
3527  * @context: specifies the context level to flush at.
3528  *
3529  * After a reset condition via TMF, we need to flush orphaned i/o
3530  * contexts from the adapter. This routine aborts any contexts
3531  * outstanding, then waits for their completions. The wait is
3532  * bounded by devloss_tmo though.
3533  *
3534  * Return code :
3535  *  0x2003 - Error
3536  *  0x2002 - Success
3537  **/
3538 static int
3539 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3540                         uint64_t lun_id, lpfc_ctx_cmd context)
3541 {
3542         struct lpfc_hba   *phba = vport->phba;
3543         unsigned long later;
3544         int cnt;
3545
3546         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3547         if (cnt)
3548                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3549                                     tgt_id, lun_id, context);
3550         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3551         while (time_after(later, jiffies) && cnt) {
3552                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3553                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3554         }
3555         if (cnt) {
3556                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3557                         "0724 I/O flush failure for context %s : cnt x%x\n",
3558                         ((context == LPFC_CTX_LUN) ? "LUN" :
3559                          ((context == LPFC_CTX_TGT) ? "TGT" :
3560                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3561                         cnt);
3562                 return FAILED;
3563         }
3564         return SUCCESS;
3565 }
3566
3567 /**
3568  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3569  * @cmnd: Pointer to scsi_cmnd data structure.
3570  *
3571  * This routine does a device reset by sending a LUN_RESET task management
3572  * command.
3573  *
3574  * Return code :
3575  *  0x2003 - Error
3576  *  0x2002 - Success
3577  **/
3578 static int
3579 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3580 {
3581         struct Scsi_Host  *shost = cmnd->device->host;
3582         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3583         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3584         struct lpfc_nodelist *pnode;
3585         unsigned tgt_id = cmnd->device->id;
3586         unsigned int lun_id = cmnd->device->lun;
3587         struct lpfc_scsi_event_header scsi_event;
3588         int status;
3589
3590         if (!rdata) {
3591                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3592                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
3593                 return FAILED;
3594         }
3595         pnode = rdata->pnode;
3596         status = fc_block_scsi_eh(cmnd);
3597         if (status)
3598                 return status;
3599
3600         status = lpfc_chk_tgt_mapped(vport, cmnd);
3601         if (status == FAILED) {
3602                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3603                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
3604                 return FAILED;
3605         }
3606
3607         scsi_event.event_type = FC_REG_SCSI_EVENT;
3608         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3609         scsi_event.lun = lun_id;
3610         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3611         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3612
3613         fc_host_post_vendor_event(shost, fc_get_event_number(),
3614                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3615
3616         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3617                                                 FCP_LUN_RESET);
3618
3619         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3620                          "0713 SCSI layer issued Device Reset (%d, %d) "
3621                          "return x%x\n", tgt_id, lun_id, status);
3622
3623         /*
3624          * We have to clean up i/o as : they may be orphaned by the TMF;
3625          * or if the TMF failed, they may be in an indeterminate state.
3626          * So, continue on.
3627          * We will report success if all the i/o aborts successfully.
3628          */
3629         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3630                                                 LPFC_CTX_LUN);
3631         return status;
3632 }
3633
3634 /**
3635  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3636  * @cmnd: Pointer to scsi_cmnd data structure.
3637  *
3638  * This routine does a target reset by sending a TARGET_RESET task management
3639  * command.
3640  *
3641  * Return code :
3642  *  0x2003 - Error
3643  *  0x2002 - Success
3644  **/
3645 static int
3646 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3647 {
3648         struct Scsi_Host  *shost = cmnd->device->host;
3649         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3650         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3651         struct lpfc_nodelist *pnode;
3652         unsigned tgt_id = cmnd->device->id;
3653         unsigned int lun_id = cmnd->device->lun;
3654         struct lpfc_scsi_event_header scsi_event;
3655         int status;
3656
3657         if (!rdata) {
3658                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3659                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
3660                 return FAILED;
3661         }
3662         pnode = rdata->pnode;
3663         status = fc_block_scsi_eh(cmnd);
3664         if (status)
3665                 return status;
3666
3667         status = lpfc_chk_tgt_mapped(vport, cmnd);
3668         if (status == FAILED) {
3669                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3670                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
3671                 return FAILED;
3672         }
3673
3674         scsi_event.event_type = FC_REG_SCSI_EVENT;
3675         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3676         scsi_event.lun = 0;
3677         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3678         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3679
3680         fc_host_post_vendor_event(shost, fc_get_event_number(),
3681                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3682
3683         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3684                                         FCP_TARGET_RESET);
3685
3686         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3687                          "0723 SCSI layer issued Target Reset (%d, %d) "
3688                          "return x%x\n", tgt_id, lun_id, status);
3689
3690         /*
3691          * We have to clean up i/o as : they may be orphaned by the TMF;
3692          * or if the TMF failed, they may be in an indeterminate state.
3693          * So, continue on.
3694          * We will report success if all the i/o aborts successfully.
3695          */
3696         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3697                                         LPFC_CTX_TGT);
3698         return status;
3699 }
3700
3701 /**
3702  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3703  * @cmnd: Pointer to scsi_cmnd data structure.
3704  *
3705  * This routine does target reset to all targets on @cmnd->device->host.
3706  * This emulates Parallel SCSI Bus Reset Semantics.
3707  *
3708  * Return code :
3709  *  0x2003 - Error
3710  *  0x2002 - Success
3711  **/
3712 static int
3713 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3714 {
3715         struct Scsi_Host  *shost = cmnd->device->host;
3716         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3717         struct lpfc_nodelist *ndlp = NULL;
3718         struct lpfc_scsi_event_header scsi_event;
3719         int match;
3720         int ret = SUCCESS, status, i;
3721
3722         scsi_event.event_type = FC_REG_SCSI_EVENT;
3723         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3724         scsi_event.lun = 0;
3725         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3726         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3727
3728         fc_host_post_vendor_event(shost, fc_get_event_number(),
3729                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3730
3731         ret = fc_block_scsi_eh(cmnd);
3732         if (ret)
3733                 return ret;
3734
3735         /*
3736          * Since the driver manages a single bus device, reset all
3737          * targets known to the driver.  Should any target reset
3738          * fail, this routine returns failure to the midlayer.
3739          */
3740         for (i = 0; i < LPFC_MAX_TARGET; i++) {
3741                 /* Search for mapped node by target ID */
3742                 match = 0;
3743                 spin_lock_irq(shost->host_lock);
3744                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3745                         if (!NLP_CHK_NODE_ACT(ndlp))
3746                                 continue;
3747                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3748                             ndlp->nlp_sid == i &&
3749                             ndlp->rport) {
3750                                 match = 1;
3751                                 break;
3752                         }
3753                 }
3754                 spin_unlock_irq(shost->host_lock);
3755                 if (!match)
3756                         continue;
3757
3758                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3759                                         i, 0, FCP_TARGET_RESET);
3760
3761                 if (status != SUCCESS) {
3762                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3763                                          "0700 Bus Reset on target %d failed\n",
3764                                          i);
3765                         ret = FAILED;
3766                 }
3767         }
3768         /*
3769          * We have to clean up i/o as : they may be orphaned by the TMFs
3770          * above; or if any of the TMFs failed, they may be in an
3771          * indeterminate state.
3772          * We will report success if all the i/o aborts successfully.
3773          */
3774
3775         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3776         if (status != SUCCESS)
3777                 ret = FAILED;
3778
3779         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3780                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3781         return ret;
3782 }
3783
3784 /**
3785  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3786  * @sdev: Pointer to scsi_device.
3787  *
3788  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
3789  * globally available list of scsi buffers. This routine also makes sure scsi
3790  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3791  * of scsi buffer exists for the lifetime of the driver.
3792  *
3793  * Return codes:
3794  *   non-0 - Error
3795  *   0 - Success
3796  **/
3797 static int
3798 lpfc_slave_alloc(struct scsi_device *sdev)
3799 {
3800         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3801         struct lpfc_hba   *phba = vport->phba;
3802         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3803         uint32_t total = 0;
3804         uint32_t num_to_alloc = 0;
3805         int num_allocated = 0;
3806         uint32_t sdev_cnt;
3807
3808         if (!rport || fc_remote_port_chkready(rport))
3809                 return -ENXIO;
3810
3811         sdev->hostdata = rport->dd_data;
3812         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
3813
3814         /*
3815          * Populate the cmds_per_lun count scsi_bufs into this host's globally
3816          * available list of scsi buffers.  Don't allocate more than the
3817          * HBA limit conveyed to the midlayer via the host structure.  The
3818          * formula accounts for the lun_queue_depth + error handlers + 1
3819          * extra.  This list of scsi bufs exists for the lifetime of the driver.
3820          */
3821         total = phba->total_scsi_bufs;
3822         num_to_alloc = vport->cfg_lun_queue_depth + 2;
3823
3824         /* If allocated buffers are enough do nothing */
3825         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3826                 return 0;
3827
3828         /* Allow some exchanges to be available always to complete discovery */
3829         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3830                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3831                                  "0704 At limitation of %d preallocated "
3832                                  "command buffers\n", total);
3833                 return 0;
3834         /* Allow some exchanges to be available always to complete discovery */
3835         } else if (total + num_to_alloc >
3836                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3837                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3838                                  "0705 Allocation request of %d "
3839                                  "command buffers will exceed max of %d.  "
3840                                  "Reducing allocation request to %d.\n",
3841                                  num_to_alloc, phba->cfg_hba_queue_depth,
3842                                  (phba->cfg_hba_queue_depth - total));
3843                 num_to_alloc = phba->cfg_hba_queue_depth - total;
3844         }
3845         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3846         if (num_to_alloc != num_allocated) {
3847                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3848                                  "0708 Allocation request of %d "
3849                                  "command buffers did not succeed.  "
3850                                  "Allocated %d buffers.\n",
3851                                  num_to_alloc, num_allocated);
3852         }
3853         if (num_allocated > 0)
3854                 phba->total_scsi_bufs += num_allocated;
3855         return 0;
3856 }
3857
3858 /**
3859  * lpfc_slave_configure - scsi_host_template slave_configure entry point
3860  * @sdev: Pointer to scsi_device.
3861  *
3862  * This routine configures following items
3863  *   - Tag command queuing support for @sdev if supported.
3864  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3865  *
3866  * Return codes:
3867  *   0 - Success
3868  **/
3869 static int
3870 lpfc_slave_configure(struct scsi_device *sdev)
3871 {
3872         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3873         struct lpfc_hba   *phba = vport->phba;
3874
3875         if (sdev->tagged_supported)
3876                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3877         else
3878                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3879
3880         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3881                 lpfc_sli_handle_fast_ring_event(phba,
3882                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3883                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3884                         lpfc_poll_rearm_timer(phba);
3885         }
3886
3887         return 0;
3888 }
3889
3890 /**
3891  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3892  * @sdev: Pointer to scsi_device.
3893  *
3894  * This routine sets @sdev hostatdata filed to null.
3895  **/
3896 static void
3897 lpfc_slave_destroy(struct scsi_device *sdev)
3898 {
3899         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3900         struct lpfc_hba   *phba = vport->phba;
3901         atomic_dec(&phba->sdev_cnt);
3902         sdev->hostdata = NULL;
3903         return;
3904 }
3905
3906
3907 struct scsi_host_template lpfc_template = {
3908         .module                 = THIS_MODULE,
3909         .name                   = LPFC_DRIVER_NAME,
3910         .info                   = lpfc_info,
3911         .queuecommand           = lpfc_queuecommand,
3912         .eh_abort_handler       = lpfc_abort_handler,
3913         .eh_device_reset_handler = lpfc_device_reset_handler,
3914         .eh_target_reset_handler = lpfc_target_reset_handler,
3915         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3916         .slave_alloc            = lpfc_slave_alloc,
3917         .slave_configure        = lpfc_slave_configure,
3918         .slave_destroy          = lpfc_slave_destroy,
3919         .scan_finished          = lpfc_scan_finished,
3920         .this_id                = -1,
3921         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3922         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3923         .use_clustering         = ENABLE_CLUSTERING,
3924         .shost_attrs            = lpfc_hba_attrs,
3925         .max_sectors            = 0xFFFF,
3926         .vendor_id              = LPFC_NL_VENDOR_ID,
3927         .change_queue_depth     = lpfc_change_queue_depth,
3928 };
3929
3930 struct scsi_host_template lpfc_vport_template = {
3931         .module                 = THIS_MODULE,
3932         .name                   = LPFC_DRIVER_NAME,
3933         .info                   = lpfc_info,
3934         .queuecommand           = lpfc_queuecommand,
3935         .eh_abort_handler       = lpfc_abort_handler,
3936         .eh_device_reset_handler = lpfc_device_reset_handler,
3937         .eh_target_reset_handler = lpfc_target_reset_handler,
3938         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3939         .slave_alloc            = lpfc_slave_alloc,
3940         .slave_configure        = lpfc_slave_configure,
3941         .slave_destroy          = lpfc_slave_destroy,
3942         .scan_finished          = lpfc_scan_finished,
3943         .this_id                = -1,
3944         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3945         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3946         .use_clustering         = ENABLE_CLUSTERING,
3947         .shost_attrs            = lpfc_vport_attrs,
3948         .max_sectors            = 0xFFFF,
3949         .change_queue_depth     = lpfc_change_queue_depth,
3950 };