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/IP combination\n",
1306                                         scsi_get_prot_op(sc));
1307                         ret = 1;
1308                         break;
1309
1310                 }
1311         } else {
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                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1328                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1329                         break;
1330
1331                 case SCSI_PROT_NORMAL:
1332                 default:
1333                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1334                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1335                                         scsi_get_prot_op(sc));
1336                         ret = 1;
1337                         break;
1338                 }
1339         }
1340
1341         return ret;
1342 }
1343
1344 struct scsi_dif_tuple {
1345         __be16 guard_tag;       /* Checksum */
1346         __be16 app_tag;         /* Opaque storage */
1347         __be32 ref_tag;         /* Target LBA or indirect LBA */
1348 };
1349
1350 static inline unsigned
1351 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1352 {
1353         return sc->device->sector_size;
1354 }
1355
1356 /*
1357  * This function sets up buffer list for protection groups of
1358  * type LPFC_PG_TYPE_NO_DIF
1359  *
1360  * This is usually used when the HBA is instructed to generate
1361  * DIFs and insert them into data stream (or strip DIF from
1362  * incoming data stream)
1363  *
1364  * The buffer list consists of just one protection group described
1365  * below:
1366  *                                +-------------------------+
1367  *   start of prot group  -->     |          PDE_5          |
1368  *                                +-------------------------+
1369  *                                |          PDE_6          |
1370  *                                +-------------------------+
1371  *                                |         Data BDE        |
1372  *                                +-------------------------+
1373  *                                |more Data BDE's ... (opt)|
1374  *                                +-------------------------+
1375  *
1376  * @sc: pointer to scsi command we're working on
1377  * @bpl: pointer to buffer list for protection groups
1378  * @datacnt: number of segments of data that have been dma mapped
1379  *
1380  * Note: Data s/g buffers have been dma mapped
1381  */
1382 static int
1383 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1384                 struct ulp_bde64 *bpl, int datasegcnt)
1385 {
1386         struct scatterlist *sgde = NULL; /* s/g data entry */
1387         struct lpfc_pde5 *pde5 = NULL;
1388         struct lpfc_pde6 *pde6 = NULL;
1389         dma_addr_t physaddr;
1390         int i = 0, num_bde = 0, status;
1391         int datadir = sc->sc_data_direction;
1392         uint32_t reftag;
1393         unsigned blksize;
1394         uint8_t txop, rxop;
1395
1396         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1397         if (status)
1398                 goto out;
1399
1400         /* extract some info from the scsi command for pde*/
1401         blksize = lpfc_cmd_blksize(sc);
1402         reftag = scsi_get_lba(sc) & 0xffffffff;
1403
1404         /* setup PDE5 with what we have */
1405         pde5 = (struct lpfc_pde5 *) bpl;
1406         memset(pde5, 0, sizeof(struct lpfc_pde5));
1407         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1408
1409         /* Endianness conversion if necessary for PDE5 */
1410         pde5->word0 = cpu_to_le32(pde5->word0);
1411         pde5->reftag = cpu_to_le32(reftag);
1412
1413         /* advance bpl and increment bde count */
1414         num_bde++;
1415         bpl++;
1416         pde6 = (struct lpfc_pde6 *) bpl;
1417
1418         /* setup PDE6 with the rest of the info */
1419         memset(pde6, 0, sizeof(struct lpfc_pde6));
1420         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1421         bf_set(pde6_optx, pde6, txop);
1422         bf_set(pde6_oprx, pde6, rxop);
1423         if (datadir == DMA_FROM_DEVICE) {
1424                 bf_set(pde6_ce, pde6, 1);
1425                 bf_set(pde6_re, pde6, 1);
1426         }
1427         bf_set(pde6_ai, pde6, 1);
1428         bf_set(pde6_ae, pde6, 0);
1429         bf_set(pde6_apptagval, pde6, 0);
1430
1431         /* Endianness conversion if necessary for PDE6 */
1432         pde6->word0 = cpu_to_le32(pde6->word0);
1433         pde6->word1 = cpu_to_le32(pde6->word1);
1434         pde6->word2 = cpu_to_le32(pde6->word2);
1435
1436         /* advance bpl and increment bde count */
1437         num_bde++;
1438         bpl++;
1439
1440         /* assumption: caller has already run dma_map_sg on command data */
1441         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1442                 physaddr = sg_dma_address(sgde);
1443                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1444                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1445                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1446                 if (datadir == DMA_TO_DEVICE)
1447                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1448                 else
1449                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1450                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1451                 bpl++;
1452                 num_bde++;
1453         }
1454
1455 out:
1456         return num_bde;
1457 }
1458
1459 /*
1460  * This function sets up buffer list for protection groups of
1461  * type LPFC_PG_TYPE_DIF_BUF
1462  *
1463  * This is usually used when DIFs are in their own buffers,
1464  * separate from the data. The HBA can then by instructed
1465  * to place the DIFs in the outgoing stream.  For read operations,
1466  * The HBA could extract the DIFs and place it in DIF buffers.
1467  *
1468  * The buffer list for this type consists of one or more of the
1469  * protection groups described below:
1470  *                                    +-------------------------+
1471  *   start of first prot group  -->   |          PDE_5          |
1472  *                                    +-------------------------+
1473  *                                    |          PDE_6          |
1474  *                                    +-------------------------+
1475  *                                    |      PDE_7 (Prot BDE)   |
1476  *                                    +-------------------------+
1477  *                                    |        Data BDE         |
1478  *                                    +-------------------------+
1479  *                                    |more Data BDE's ... (opt)|
1480  *                                    +-------------------------+
1481  *   start of new  prot group  -->    |          PDE_5          |
1482  *                                    +-------------------------+
1483  *                                    |          ...            |
1484  *                                    +-------------------------+
1485  *
1486  * @sc: pointer to scsi command we're working on
1487  * @bpl: pointer to buffer list for protection groups
1488  * @datacnt: number of segments of data that have been dma mapped
1489  * @protcnt: number of segment of protection data that have been dma mapped
1490  *
1491  * Note: It is assumed that both data and protection s/g buffers have been
1492  *       mapped for DMA
1493  */
1494 static int
1495 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1496                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1497 {
1498         struct scatterlist *sgde = NULL; /* s/g data entry */
1499         struct scatterlist *sgpe = NULL; /* s/g prot entry */
1500         struct lpfc_pde5 *pde5 = NULL;
1501         struct lpfc_pde6 *pde6 = NULL;
1502         struct lpfc_pde7 *pde7 = NULL;
1503         dma_addr_t dataphysaddr, protphysaddr;
1504         unsigned short curr_data = 0, curr_prot = 0;
1505         unsigned int split_offset;
1506         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1507         unsigned int protgrp_blks, protgrp_bytes;
1508         unsigned int remainder, subtotal;
1509         int status;
1510         int datadir = sc->sc_data_direction;
1511         unsigned char pgdone = 0, alldone = 0;
1512         unsigned blksize;
1513         uint32_t reftag;
1514         uint8_t txop, rxop;
1515         int num_bde = 0;
1516
1517         sgpe = scsi_prot_sglist(sc);
1518         sgde = scsi_sglist(sc);
1519
1520         if (!sgpe || !sgde) {
1521                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1522                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
1523                                 sgpe, sgde);
1524                 return 0;
1525         }
1526
1527         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1528         if (status)
1529                 goto out;
1530
1531         /* extract some info from the scsi command */
1532         blksize = lpfc_cmd_blksize(sc);
1533         reftag = scsi_get_lba(sc) & 0xffffffff;
1534
1535         split_offset = 0;
1536         do {
1537                 /* setup PDE5 with what we have */
1538                 pde5 = (struct lpfc_pde5 *) bpl;
1539                 memset(pde5, 0, sizeof(struct lpfc_pde5));
1540                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1541
1542                 /* Endianness conversion if necessary for PDE5 */
1543                 pde5->word0 = cpu_to_le32(pde5->word0);
1544                 pde5->reftag = cpu_to_le32(reftag);
1545
1546                 /* advance bpl and increment bde count */
1547                 num_bde++;
1548                 bpl++;
1549                 pde6 = (struct lpfc_pde6 *) bpl;
1550
1551                 /* setup PDE6 with the rest of the info */
1552                 memset(pde6, 0, sizeof(struct lpfc_pde6));
1553                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1554                 bf_set(pde6_optx, pde6, txop);
1555                 bf_set(pde6_oprx, pde6, rxop);
1556                 bf_set(pde6_ce, pde6, 1);
1557                 bf_set(pde6_re, pde6, 1);
1558                 bf_set(pde6_ai, pde6, 1);
1559                 bf_set(pde6_ae, pde6, 0);
1560                 bf_set(pde6_apptagval, pde6, 0);
1561
1562                 /* Endianness conversion if necessary for PDE6 */
1563                 pde6->word0 = cpu_to_le32(pde6->word0);
1564                 pde6->word1 = cpu_to_le32(pde6->word1);
1565                 pde6->word2 = cpu_to_le32(pde6->word2);
1566
1567                 /* advance bpl and increment bde count */
1568                 num_bde++;
1569                 bpl++;
1570
1571                 /* setup the first BDE that points to protection buffer */
1572                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1573                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1574
1575                 /* must be integer multiple of the DIF block length */
1576                 BUG_ON(protgroup_len % 8);
1577
1578                 pde7 = (struct lpfc_pde7 *) bpl;
1579                 memset(pde7, 0, sizeof(struct lpfc_pde7));
1580                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1581
1582                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
1583                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
1584
1585                 protgrp_blks = protgroup_len / 8;
1586                 protgrp_bytes = protgrp_blks * blksize;
1587
1588                 /* check if this pde is crossing the 4K boundary; if so split */
1589                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1590                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1591                         protgroup_offset += protgroup_remainder;
1592                         protgrp_blks = protgroup_remainder / 8;
1593                         protgrp_bytes = protgrp_blks * blksize;
1594                 } else {
1595                         protgroup_offset = 0;
1596                         curr_prot++;
1597                 }
1598
1599                 num_bde++;
1600
1601                 /* setup BDE's for data blocks associated with DIF data */
1602                 pgdone = 0;
1603                 subtotal = 0; /* total bytes processed for current prot grp */
1604                 while (!pgdone) {
1605                         if (!sgde) {
1606                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1607                                         "9065 BLKGRD:%s Invalid data segment\n",
1608                                                 __func__);
1609                                 return 0;
1610                         }
1611                         bpl++;
1612                         dataphysaddr = sg_dma_address(sgde) + split_offset;
1613                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1614                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1615
1616                         remainder = sg_dma_len(sgde) - split_offset;
1617
1618                         if ((subtotal + remainder) <= protgrp_bytes) {
1619                                 /* we can use this whole buffer */
1620                                 bpl->tus.f.bdeSize = remainder;
1621                                 split_offset = 0;
1622
1623                                 if ((subtotal + remainder) == protgrp_bytes)
1624                                         pgdone = 1;
1625                         } else {
1626                                 /* must split this buffer with next prot grp */
1627                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1628                                 split_offset += bpl->tus.f.bdeSize;
1629                         }
1630
1631                         subtotal += bpl->tus.f.bdeSize;
1632
1633                         if (datadir == DMA_TO_DEVICE)
1634                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1635                         else
1636                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1637                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
1638
1639                         num_bde++;
1640                         curr_data++;
1641
1642                         if (split_offset)
1643                                 break;
1644
1645                         /* Move to the next s/g segment if possible */
1646                         sgde = sg_next(sgde);
1647
1648                 }
1649
1650                 if (protgroup_offset) {
1651                         /* update the reference tag */
1652                         reftag += protgrp_blks;
1653                         bpl++;
1654                         continue;
1655                 }
1656
1657                 /* are we done ? */
1658                 if (curr_prot == protcnt) {
1659                         alldone = 1;
1660                 } else if (curr_prot < protcnt) {
1661                         /* advance to next prot buffer */
1662                         sgpe = sg_next(sgpe);
1663                         bpl++;
1664
1665                         /* update the reference tag */
1666                         reftag += protgrp_blks;
1667                 } else {
1668                         /* if we're here, we have a bug */
1669                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1670                                 "9054 BLKGRD: bug in %s\n", __func__);
1671                 }
1672
1673         } while (!alldone);
1674
1675 out:
1676
1677         return num_bde;
1678 }
1679
1680 /*
1681  * Given a SCSI command that supports DIF, determine composition of protection
1682  * groups involved in setting up buffer lists
1683  *
1684  * Returns:
1685  *                            for DIF (for both read and write)
1686  * */
1687 static int
1688 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1689 {
1690         int ret = LPFC_PG_TYPE_INVALID;
1691         unsigned char op = scsi_get_prot_op(sc);
1692
1693         switch (op) {
1694         case SCSI_PROT_READ_STRIP:
1695         case SCSI_PROT_WRITE_INSERT:
1696                 ret = LPFC_PG_TYPE_NO_DIF;
1697                 break;
1698         case SCSI_PROT_READ_INSERT:
1699         case SCSI_PROT_WRITE_STRIP:
1700         case SCSI_PROT_READ_PASS:
1701         case SCSI_PROT_WRITE_PASS:
1702                 ret = LPFC_PG_TYPE_DIF_BUF;
1703                 break;
1704         default:
1705                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1706                                 "9021 Unsupported protection op:%d\n", op);
1707                 break;
1708         }
1709
1710         return ret;
1711 }
1712
1713 /*
1714  * This is the protection/DIF aware version of
1715  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
1716  * two functions eventually, but for now, it's here
1717  */
1718 static int
1719 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
1720                 struct lpfc_scsi_buf *lpfc_cmd)
1721 {
1722         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1723         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1724         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1725         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1726         uint32_t num_bde = 0;
1727         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
1728         int prot_group_type = 0;
1729         int diflen, fcpdl;
1730         unsigned blksize;
1731
1732         /*
1733          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
1734          *  fcp_rsp regions to the first data bde entry
1735          */
1736         bpl += 2;
1737         if (scsi_sg_count(scsi_cmnd)) {
1738                 /*
1739                  * The driver stores the segment count returned from pci_map_sg
1740                  * because this a count of dma-mappings used to map the use_sg
1741                  * pages.  They are not guaranteed to be the same for those
1742                  * architectures that implement an IOMMU.
1743                  */
1744                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
1745                                         scsi_sglist(scsi_cmnd),
1746                                         scsi_sg_count(scsi_cmnd), datadir);
1747                 if (unlikely(!datasegcnt))
1748                         return 1;
1749
1750                 lpfc_cmd->seg_cnt = datasegcnt;
1751                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1752                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1753                                         "9067 BLKGRD: %s: Too many sg segments"
1754                                         " from dma_map_sg.  Config %d, seg_cnt"
1755                                         " %d\n",
1756                                         __func__, phba->cfg_sg_seg_cnt,
1757                                         lpfc_cmd->seg_cnt);
1758                         scsi_dma_unmap(scsi_cmnd);
1759                         return 1;
1760                 }
1761
1762                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
1763
1764                 switch (prot_group_type) {
1765                 case LPFC_PG_TYPE_NO_DIF:
1766                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
1767                                         datasegcnt);
1768                         /* we should have 2 or more entries in buffer list */
1769                         if (num_bde < 2)
1770                                 goto err;
1771                         break;
1772                 case LPFC_PG_TYPE_DIF_BUF:{
1773                         /*
1774                          * This type indicates that protection buffers are
1775                          * passed to the driver, so that needs to be prepared
1776                          * for DMA
1777                          */
1778                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
1779                                         scsi_prot_sglist(scsi_cmnd),
1780                                         scsi_prot_sg_count(scsi_cmnd), datadir);
1781                         if (unlikely(!protsegcnt)) {
1782                                 scsi_dma_unmap(scsi_cmnd);
1783                                 return 1;
1784                         }
1785
1786                         lpfc_cmd->prot_seg_cnt = protsegcnt;
1787                         if (lpfc_cmd->prot_seg_cnt
1788                             > phba->cfg_prot_sg_seg_cnt) {
1789                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1790                                         "9068 BLKGRD: %s: Too many prot sg "
1791                                         "segments from dma_map_sg.  Config %d,"
1792                                                 "prot_seg_cnt %d\n", __func__,
1793                                                 phba->cfg_prot_sg_seg_cnt,
1794                                                 lpfc_cmd->prot_seg_cnt);
1795                                 dma_unmap_sg(&phba->pcidev->dev,
1796                                              scsi_prot_sglist(scsi_cmnd),
1797                                              scsi_prot_sg_count(scsi_cmnd),
1798                                              datadir);
1799                                 scsi_dma_unmap(scsi_cmnd);
1800                                 return 1;
1801                         }
1802
1803                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
1804                                         datasegcnt, protsegcnt);
1805                         /* we should have 3 or more entries in buffer list */
1806                         if (num_bde < 3)
1807                                 goto err;
1808                         break;
1809                 }
1810                 case LPFC_PG_TYPE_INVALID:
1811                 default:
1812                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1813                                         "9022 Unexpected protection group %i\n",
1814                                         prot_group_type);
1815                         return 1;
1816                 }
1817         }
1818
1819         /*
1820          * Finish initializing those IOCB fields that are dependent on the
1821          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
1822          * reinitialized since all iocb memory resources are used many times
1823          * for transmit, receive, and continuation bpl's.
1824          */
1825         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
1826         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
1827         iocb_cmd->ulpBdeCount = 1;
1828         iocb_cmd->ulpLe = 1;
1829
1830         fcpdl = scsi_bufflen(scsi_cmnd);
1831
1832         if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
1833                 /*
1834                  * We are in DIF Type 1 mode
1835                  * Every data block has a 8 byte DIF (trailer)
1836                  * attached to it.  Must ajust FCP data length
1837                  */
1838                 blksize = lpfc_cmd_blksize(scsi_cmnd);
1839                 diflen = (fcpdl / blksize) * 8;
1840                 fcpdl += diflen;
1841         }
1842         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
1843
1844         /*
1845          * Due to difference in data length between DIF/non-DIF paths,
1846          * we need to set word 4 of IOCB here
1847          */
1848         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
1849
1850         return 0;
1851 err:
1852         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1853                         "9023 Could not setup all needed BDE's"
1854                         "prot_group_type=%d, num_bde=%d\n",
1855                         prot_group_type, num_bde);
1856         return 1;
1857 }
1858
1859 /*
1860  * This function checks for BlockGuard errors detected by
1861  * the HBA.  In case of errors, the ASC/ASCQ fields in the
1862  * sense buffer will be set accordingly, paired with
1863  * ILLEGAL_REQUEST to signal to the kernel that the HBA
1864  * detected corruption.
1865  *
1866  * Returns:
1867  *  0 - No error found
1868  *  1 - BlockGuard error found
1869  * -1 - Internal error (bad profile, ...etc)
1870  */
1871 static int
1872 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
1873                         struct lpfc_iocbq *pIocbOut)
1874 {
1875         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
1876         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
1877         int ret = 0;
1878         uint32_t bghm = bgf->bghm;
1879         uint32_t bgstat = bgf->bgstat;
1880         uint64_t failing_sector = 0;
1881
1882         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
1883                         " 0x%x lba 0x%llx blk cnt 0x%x "
1884                         "bgstat=0x%x bghm=0x%x\n",
1885                         cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1886                         blk_rq_sectors(cmd->request), bgstat, bghm);
1887
1888         spin_lock(&_dump_buf_lock);
1889         if (!_dump_buf_done) {
1890                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
1891                         " Data for %u blocks to debugfs\n",
1892                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1893                 lpfc_debug_save_data(phba, cmd);
1894
1895                 /* If we have a prot sgl, save the DIF buffer */
1896                 if (lpfc_prot_group_type(phba, cmd) ==
1897                                 LPFC_PG_TYPE_DIF_BUF) {
1898                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
1899                                 "Saving DIF for %u blocks to debugfs\n",
1900                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1901                         lpfc_debug_save_dif(phba, cmd);
1902                 }
1903
1904                 _dump_buf_done = 1;
1905         }
1906         spin_unlock(&_dump_buf_lock);
1907
1908         if (lpfc_bgs_get_invalid_prof(bgstat)) {
1909                 cmd->result = ScsiResult(DID_ERROR, 0);
1910                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
1911                         " BlockGuard profile. bgstat:0x%x\n",
1912                         bgstat);
1913                 ret = (-1);
1914                 goto out;
1915         }
1916
1917         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
1918                 cmd->result = ScsiResult(DID_ERROR, 0);
1919                 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
1920                                 "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1921                                 bgstat);
1922                 ret = (-1);
1923                 goto out;
1924         }
1925
1926         if (lpfc_bgs_get_guard_err(bgstat)) {
1927                 ret = 1;
1928
1929                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1930                                 0x10, 0x1);
1931                 cmd->result = DRIVER_SENSE << 24
1932                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1933                 phba->bg_guard_err_cnt++;
1934                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1935                         "9055 BLKGRD: guard_tag error\n");
1936         }
1937
1938         if (lpfc_bgs_get_reftag_err(bgstat)) {
1939                 ret = 1;
1940
1941                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1942                                 0x10, 0x3);
1943                 cmd->result = DRIVER_SENSE << 24
1944                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1945
1946                 phba->bg_reftag_err_cnt++;
1947                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1948                         "9056 BLKGRD: ref_tag error\n");
1949         }
1950
1951         if (lpfc_bgs_get_apptag_err(bgstat)) {
1952                 ret = 1;
1953
1954                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
1955                                 0x10, 0x2);
1956                 cmd->result = DRIVER_SENSE << 24
1957                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
1958
1959                 phba->bg_apptag_err_cnt++;
1960                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1961                         "9061 BLKGRD: app_tag error\n");
1962         }
1963
1964         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
1965                 /*
1966                  * setup sense data descriptor 0 per SPC-4 as an information
1967                  * field, and put the failing LBA in it.
1968                  * This code assumes there was also a guard/app/ref tag error
1969                  * indication.
1970                  */
1971                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
1972                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
1973                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
1974                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
1975                 bghm /= cmd->device->sector_size;
1976
1977                 failing_sector = scsi_get_lba(cmd);
1978                 failing_sector += bghm;
1979
1980                 /* Descriptor Information */
1981                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
1982         }
1983
1984         if (!ret) {
1985                 /* No error was reported - problem in FW? */
1986                 cmd->result = ScsiResult(DID_ERROR, 0);
1987                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1988                         "9057 BLKGRD: no errors reported!\n");
1989         }
1990
1991 out:
1992         return ret;
1993 }
1994
1995 /**
1996  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
1997  * @phba: The Hba for which this call is being executed.
1998  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1999  *
2000  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
2001  * field of @lpfc_cmd for device with SLI-4 interface spec.
2002  *
2003  * Return codes:
2004  *      1 - Error
2005  *      0 - Success
2006  **/
2007 static int
2008 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2009 {
2010         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2011         struct scatterlist *sgel = NULL;
2012         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2013         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
2014         struct sli4_sge *first_data_sgl;
2015         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2016         dma_addr_t physaddr;
2017         uint32_t num_bde = 0;
2018         uint32_t dma_len;
2019         uint32_t dma_offset = 0;
2020         int nseg;
2021         struct ulp_bde64 *bde;
2022
2023         /*
2024          * There are three possibilities here - use scatter-gather segment, use
2025          * the single mapping, or neither.  Start the lpfc command prep by
2026          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2027          * data bde entry.
2028          */
2029         if (scsi_sg_count(scsi_cmnd)) {
2030                 /*
2031                  * The driver stores the segment count returned from pci_map_sg
2032                  * because this a count of dma-mappings used to map the use_sg
2033                  * pages.  They are not guaranteed to be the same for those
2034                  * architectures that implement an IOMMU.
2035                  */
2036
2037                 nseg = scsi_dma_map(scsi_cmnd);
2038                 if (unlikely(!nseg))
2039                         return 1;
2040                 sgl += 1;
2041                 /* clear the last flag in the fcp_rsp map entry */
2042                 sgl->word2 = le32_to_cpu(sgl->word2);
2043                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2044                 sgl->word2 = cpu_to_le32(sgl->word2);
2045                 sgl += 1;
2046                 first_data_sgl = sgl;
2047                 lpfc_cmd->seg_cnt = nseg;
2048                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2049                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
2050                                 " %s: Too many sg segments from "
2051                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
2052                                 __func__, phba->cfg_sg_seg_cnt,
2053                                lpfc_cmd->seg_cnt);
2054                         scsi_dma_unmap(scsi_cmnd);
2055                         return 1;
2056                 }
2057
2058                 /*
2059                  * The driver established a maximum scatter-gather segment count
2060                  * during probe that limits the number of sg elements in any
2061                  * single scsi command.  Just run through the seg_cnt and format
2062                  * the sge's.
2063                  * When using SLI-3 the driver will try to fit all the BDEs into
2064                  * the IOCB. If it can't then the BDEs get added to a BPL as it
2065                  * does for SLI-2 mode.
2066                  */
2067                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
2068                         physaddr = sg_dma_address(sgel);
2069                         dma_len = sg_dma_len(sgel);
2070                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2071                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2072                         sgl->word2 = le32_to_cpu(sgl->word2);
2073                         if ((num_bde + 1) == nseg)
2074                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2075                         else
2076                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2077                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2078                         sgl->word2 = cpu_to_le32(sgl->word2);
2079                         sgl->sge_len = cpu_to_le32(dma_len);
2080                         dma_offset += dma_len;
2081                         sgl++;
2082                 }
2083                 /* setup the performance hint (first data BDE) if enabled */
2084                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
2085                         bde = (struct ulp_bde64 *)
2086                                         &(iocb_cmd->unsli3.sli3Words[5]);
2087                         bde->addrLow = first_data_sgl->addr_lo;
2088                         bde->addrHigh = first_data_sgl->addr_hi;
2089                         bde->tus.f.bdeSize =
2090                                         le32_to_cpu(first_data_sgl->sge_len);
2091                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2092                         bde->tus.w = cpu_to_le32(bde->tus.w);
2093                 }
2094         } else {
2095                 sgl += 1;
2096                 /* clear the last flag in the fcp_rsp map entry */
2097                 sgl->word2 = le32_to_cpu(sgl->word2);
2098                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2099                 sgl->word2 = cpu_to_le32(sgl->word2);
2100         }
2101
2102         /*
2103          * Finish initializing those IOCB fields that are dependent on the
2104          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
2105          * explicitly reinitialized.
2106          * all iocb memory resources are reused.
2107          */
2108         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
2109
2110         /*
2111          * Due to difference in data length between DIF/non-DIF paths,
2112          * we need to set word 4 of IOCB here
2113          */
2114         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
2115         return 0;
2116 }
2117
2118 /**
2119  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
2120  * @phba: The Hba for which this call is being executed.
2121  * @lpfc_cmd: The scsi buffer which is going to be mapped.
2122  *
2123  * This routine wraps the actual DMA mapping function pointer from the
2124  * lpfc_hba struct.
2125  *
2126  * Return codes:
2127  *      1 - Error
2128  *      0 - Success
2129  **/
2130 static inline int
2131 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2132 {
2133         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
2134 }
2135
2136 /**
2137  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2138  * @phba: Pointer to hba context object.
2139  * @vport: Pointer to vport object.
2140  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
2141  * @rsp_iocb: Pointer to response iocb object which reported error.
2142  *
2143  * This function posts an event when there is a SCSI command reporting
2144  * error from the scsi device.
2145  **/
2146 static void
2147 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
2148                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
2149         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2150         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2151         uint32_t resp_info = fcprsp->rspStatus2;
2152         uint32_t scsi_status = fcprsp->rspStatus3;
2153         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2154         struct lpfc_fast_path_event *fast_path_evt = NULL;
2155         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
2156         unsigned long flags;
2157
2158         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2159                 return;
2160
2161         /* If there is queuefull or busy condition send a scsi event */
2162         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
2163                 (cmnd->result == SAM_STAT_BUSY)) {
2164                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2165                 if (!fast_path_evt)
2166                         return;
2167                 fast_path_evt->un.scsi_evt.event_type =
2168                         FC_REG_SCSI_EVENT;
2169                 fast_path_evt->un.scsi_evt.subcategory =
2170                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
2171                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
2172                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
2173                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
2174                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2175                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
2176                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2177         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
2178                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
2179                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2180                 if (!fast_path_evt)
2181                         return;
2182                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
2183                         FC_REG_SCSI_EVENT;
2184                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
2185                         LPFC_EVENT_CHECK_COND;
2186                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
2187                         cmnd->device->lun;
2188                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
2189                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2190                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
2191                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2192                 fast_path_evt->un.check_cond_evt.sense_key =
2193                         cmnd->sense_buffer[2] & 0xf;
2194                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
2195                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
2196         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2197                      fcpi_parm &&
2198                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
2199                         ((scsi_status == SAM_STAT_GOOD) &&
2200                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
2201                 /*
2202                  * If status is good or resid does not match with fcp_param and
2203                  * there is valid fcpi_parm, then there is a read_check error
2204                  */
2205                 fast_path_evt = lpfc_alloc_fast_evt(phba);
2206                 if (!fast_path_evt)
2207                         return;
2208                 fast_path_evt->un.read_check_error.header.event_type =
2209                         FC_REG_FABRIC_EVENT;
2210                 fast_path_evt->un.read_check_error.header.subcategory =
2211                         LPFC_EVENT_FCPRDCHKERR;
2212                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
2213                         &pnode->nlp_portname, sizeof(struct lpfc_name));
2214                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
2215                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
2216                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
2217                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
2218                 fast_path_evt->un.read_check_error.fcpiparam =
2219                         fcpi_parm;
2220         } else
2221                 return;
2222
2223         fast_path_evt->vport = vport;
2224         spin_lock_irqsave(&phba->hbalock, flags);
2225         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
2226         spin_unlock_irqrestore(&phba->hbalock, flags);
2227         lpfc_worker_wake_up(phba);
2228         return;
2229 }
2230
2231 /**
2232  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2233  * @phba: The HBA for which this call is being executed.
2234  * @psb: The scsi buffer which is going to be un-mapped.
2235  *
2236  * This routine does DMA un-mapping of scatter gather list of scsi command
2237  * field of @lpfc_cmd for device with SLI-3 interface spec.
2238  **/
2239 static void
2240 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2241 {
2242         /*
2243          * There are only two special cases to consider.  (1) the scsi command
2244          * requested scatter-gather usage or (2) the scsi command allocated
2245          * a request buffer, but did not request use_sg.  There is a third
2246          * case, but it does not require resource deallocation.
2247          */
2248         if (psb->seg_cnt > 0)
2249                 scsi_dma_unmap(psb->pCmd);
2250         if (psb->prot_seg_cnt > 0)
2251                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
2252                                 scsi_prot_sg_count(psb->pCmd),
2253                                 psb->pCmd->sc_data_direction);
2254 }
2255
2256 /**
2257  * lpfc_handler_fcp_err - FCP response handler
2258  * @vport: The virtual port for which this call is being executed.
2259  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2260  * @rsp_iocb: The response IOCB which contains FCP error.
2261  *
2262  * This routine is called to process response IOCB with status field
2263  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
2264  * based upon SCSI and FCP error.
2265  **/
2266 static void
2267 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2268                     struct lpfc_iocbq *rsp_iocb)
2269 {
2270         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
2271         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
2272         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2273         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
2274         uint32_t resp_info = fcprsp->rspStatus2;
2275         uint32_t scsi_status = fcprsp->rspStatus3;
2276         uint32_t *lp;
2277         uint32_t host_status = DID_OK;
2278         uint32_t rsplen = 0;
2279         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
2280
2281
2282         /*
2283          *  If this is a task management command, there is no
2284          *  scsi packet associated with this lpfc_cmd.  The driver
2285          *  consumes it.
2286          */
2287         if (fcpcmd->fcpCntl2) {
2288                 scsi_status = 0;
2289                 goto out;
2290         }
2291
2292         if (resp_info & RSP_LEN_VALID) {
2293                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
2294                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2295                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2296                                  "2719 Invalid response length: "
2297                                  "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
2298                                  cmnd->device->id,
2299                                  cmnd->device->lun, cmnd->cmnd[0],
2300                                  rsplen);
2301                         host_status = DID_ERROR;
2302                         goto out;
2303                 }
2304                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
2305                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
2306                                  "2757 Protocol failure detected during "
2307                                  "processing of FCP I/O op: "
2308                                  "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
2309                                  cmnd->device->id,
2310                                  cmnd->device->lun, cmnd->cmnd[0],
2311                                  fcprsp->rspInfo3);
2312                         host_status = DID_ERROR;
2313                         goto out;
2314                 }
2315         }
2316
2317         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
2318                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
2319                 if (snslen > SCSI_SENSE_BUFFERSIZE)
2320                         snslen = SCSI_SENSE_BUFFERSIZE;
2321
2322                 if (resp_info & RSP_LEN_VALID)
2323                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
2324                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
2325         }
2326         lp = (uint32_t *)cmnd->sense_buffer;
2327
2328         if (!scsi_status && (resp_info & RESID_UNDER))
2329                 logit = LOG_FCP;
2330
2331         lpfc_printf_vlog(vport, KERN_WARNING, logit,
2332                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
2333                          "Data: x%x x%x x%x x%x x%x\n",
2334                          cmnd->cmnd[0], scsi_status,
2335                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
2336                          be32_to_cpu(fcprsp->rspResId),
2337                          be32_to_cpu(fcprsp->rspSnsLen),
2338                          be32_to_cpu(fcprsp->rspRspLen),
2339                          fcprsp->rspInfo3);
2340
2341         scsi_set_resid(cmnd, 0);
2342         if (resp_info & RESID_UNDER) {
2343                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
2344
2345                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2346                                  "9025 FCP Read Underrun, expected %d, "
2347                                  "residual %d Data: x%x x%x x%x\n",
2348                                  be32_to_cpu(fcpcmd->fcpDl),
2349                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
2350                                  cmnd->underflow);
2351
2352                 /*
2353                  * If there is an under run check if under run reported by
2354                  * storage array is same as the under run reported by HBA.
2355                  * If this is not same, there is a dropped frame.
2356                  */
2357                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
2358                         fcpi_parm &&
2359                         (scsi_get_resid(cmnd) != fcpi_parm)) {
2360                         lpfc_printf_vlog(vport, KERN_WARNING,
2361                                          LOG_FCP | LOG_FCP_ERROR,
2362                                          "9026 FCP Read Check Error "
2363                                          "and Underrun Data: x%x x%x x%x x%x\n",
2364                                          be32_to_cpu(fcpcmd->fcpDl),
2365                                          scsi_get_resid(cmnd), fcpi_parm,
2366                                          cmnd->cmnd[0]);
2367                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2368                         host_status = DID_ERROR;
2369                 }
2370                 /*
2371                  * The cmnd->underflow is the minimum number of bytes that must
2372                  * be transferred for this command.  Provided a sense condition
2373                  * is not present, make sure the actual amount transferred is at
2374                  * least the underflow value or fail.
2375                  */
2376                 if (!(resp_info & SNS_LEN_VALID) &&
2377                     (scsi_status == SAM_STAT_GOOD) &&
2378                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
2379                      < cmnd->underflow)) {
2380                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2381                                          "9027 FCP command x%x residual "
2382                                          "underrun converted to error "
2383                                          "Data: x%x x%x x%x\n",
2384                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
2385                                          scsi_get_resid(cmnd), cmnd->underflow);
2386                         host_status = DID_ERROR;
2387                 }
2388         } else if (resp_info & RESID_OVER) {
2389                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2390                                  "9028 FCP command x%x residual overrun error. "
2391                                  "Data: x%x x%x\n", cmnd->cmnd[0],
2392                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
2393                 host_status = DID_ERROR;
2394
2395         /*
2396          * Check SLI validation that all the transfer was actually done
2397          * (fcpi_parm should be zero). Apply check only to reads.
2398          */
2399         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2400                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2401                                  "9029 FCP Read Check Error Data: "
2402                                  "x%x x%x x%x x%x x%x\n",
2403                                  be32_to_cpu(fcpcmd->fcpDl),
2404                                  be32_to_cpu(fcprsp->rspResId),
2405                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
2406                 switch (scsi_status) {
2407                 case SAM_STAT_GOOD:
2408                 case SAM_STAT_CHECK_CONDITION:
2409                         /* Fabric dropped a data frame. Fail any successful
2410                          * command in which we detected dropped frames.
2411                          * A status of good or some check conditions could
2412                          * be considered a successful command.
2413                          */
2414                         host_status = DID_ERROR;
2415                         break;
2416                 }
2417                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2418         }
2419
2420  out:
2421         cmnd->result = ScsiResult(host_status, scsi_status);
2422         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
2423 }
2424
2425 /**
2426  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2427  * @phba: The Hba for which this call is being executed.
2428  * @pIocbIn: The command IOCBQ for the scsi cmnd.
2429  * @pIocbOut: The response IOCBQ for the scsi cmnd.
2430  *
2431  * This routine assigns scsi command result by looking into response IOCB
2432  * status field appropriately. This routine handles QUEUE FULL condition as
2433  * well by ramping down device queue depth.
2434  **/
2435 static void
2436 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
2437                         struct lpfc_iocbq *pIocbOut)
2438 {
2439         struct lpfc_scsi_buf *lpfc_cmd =
2440                 (struct lpfc_scsi_buf *) pIocbIn->context1;
2441         struct lpfc_vport      *vport = pIocbIn->vport;
2442         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2443         struct lpfc_nodelist *pnode = rdata->pnode;
2444         struct scsi_cmnd *cmd;
2445         int result;
2446         struct scsi_device *tmp_sdev;
2447         int depth;
2448         unsigned long flags;
2449         struct lpfc_fast_path_event *fast_path_evt;
2450         struct Scsi_Host *shost;
2451         uint32_t queue_depth, scsi_id;
2452
2453         /* Sanity check on return of outstanding command */
2454         if (!(lpfc_cmd->pCmd))
2455                 return;
2456         cmd = lpfc_cmd->pCmd;
2457         shost = cmd->device->host;
2458
2459         lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
2460         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2461         /* pick up SLI4 exhange busy status from HBA */
2462         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
2463
2464         if (pnode && NLP_CHK_NODE_ACT(pnode))
2465                 atomic_dec(&pnode->cmd_pending);
2466
2467         if (lpfc_cmd->status) {
2468                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
2469                     (lpfc_cmd->result & IOERR_DRVR_MASK))
2470                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
2471                 else if (lpfc_cmd->status >= IOSTAT_CNT)
2472                         lpfc_cmd->status = IOSTAT_DEFAULT;
2473
2474                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2475                                  "9030 FCP cmd x%x failed <%d/%d> "
2476                                  "status: x%x result: x%x Data: x%x x%x\n",
2477                                  cmd->cmnd[0],
2478                                  cmd->device ? cmd->device->id : 0xffff,
2479                                  cmd->device ? cmd->device->lun : 0xffff,
2480                                  lpfc_cmd->status, lpfc_cmd->result,
2481                                  pIocbOut->iocb.ulpContext,
2482                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
2483
2484                 switch (lpfc_cmd->status) {
2485                 case IOSTAT_FCP_RSP_ERROR:
2486                         /* Call FCP RSP handler to determine result */
2487                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
2488                         break;
2489                 case IOSTAT_NPORT_BSY:
2490                 case IOSTAT_FABRIC_BSY:
2491                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2492                         fast_path_evt = lpfc_alloc_fast_evt(phba);
2493                         if (!fast_path_evt)
2494                                 break;
2495                         fast_path_evt->un.fabric_evt.event_type =
2496                                 FC_REG_FABRIC_EVENT;
2497                         fast_path_evt->un.fabric_evt.subcategory =
2498                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
2499                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
2500                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2501                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
2502                                         &pnode->nlp_portname,
2503                                         sizeof(struct lpfc_name));
2504                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
2505                                         &pnode->nlp_nodename,
2506                                         sizeof(struct lpfc_name));
2507                         }
2508                         fast_path_evt->vport = vport;
2509                         fast_path_evt->work_evt.evt =
2510                                 LPFC_EVT_FASTPATH_MGMT_EVT;
2511                         spin_lock_irqsave(&phba->hbalock, flags);
2512                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
2513                                 &phba->work_list);
2514                         spin_unlock_irqrestore(&phba->hbalock, flags);
2515                         lpfc_worker_wake_up(phba);
2516                         break;
2517                 case IOSTAT_LOCAL_REJECT:
2518                 case IOSTAT_REMOTE_STOP:
2519                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
2520                             lpfc_cmd->result ==
2521                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
2522                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
2523                             lpfc_cmd->result ==
2524                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
2525                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
2526                                 break;
2527                         }
2528                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2529                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
2530                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
2531                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2532                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
2533                                 break;
2534                         }
2535                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
2536                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
2537                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
2538                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2539                                         /*
2540                                          * This is a response for a BG enabled
2541                                          * cmd. Parse BG error
2542                                          */
2543                                         lpfc_parse_bg_err(phba, lpfc_cmd,
2544                                                         pIocbOut);
2545                                         break;
2546                                 } else {
2547                                         lpfc_printf_vlog(vport, KERN_WARNING,
2548                                                         LOG_BG,
2549                                                         "9031 non-zero BGSTAT "
2550                                                         "on unprotected cmd\n");
2551                                 }
2552                         }
2553                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
2554                                 && (phba->sli_rev == LPFC_SLI_REV4)
2555                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
2556                                 /* This IO was aborted by the target, we don't
2557                                  * know the rxid and because we did not send the
2558                                  * ABTS we cannot generate and RRQ.
2559                                  */
2560                                 lpfc_set_rrq_active(phba, pnode,
2561                                                 lpfc_cmd->cur_iocbq.sli4_xritag,
2562                                                 0, 0);
2563                         }
2564                 /* else: fall through */
2565                 default:
2566                         cmd->result = ScsiResult(DID_ERROR, 0);
2567                         break;
2568                 }
2569
2570                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2571                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2572                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
2573                                                  SAM_STAT_BUSY);
2574         } else
2575                 cmd->result = ScsiResult(DID_OK, 0);
2576
2577         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
2578                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
2579
2580                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2581                                  "0710 Iodone <%d/%d> cmd %p, error "
2582                                  "x%x SNS x%x x%x Data: x%x x%x\n",
2583                                  cmd->device->id, cmd->device->lun, cmd,
2584                                  cmd->result, *lp, *(lp + 3), cmd->retries,
2585                                  scsi_get_resid(cmd));
2586         }
2587
2588         lpfc_update_stats(phba, lpfc_cmd);
2589         result = cmd->result;
2590         if (vport->cfg_max_scsicmpl_time &&
2591            time_after(jiffies, lpfc_cmd->start_time +
2592                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2593                 spin_lock_irqsave(shost->host_lock, flags);
2594                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2595                         if (pnode->cmd_qdepth >
2596                                 atomic_read(&pnode->cmd_pending) &&
2597                                 (atomic_read(&pnode->cmd_pending) >
2598                                 LPFC_MIN_TGT_QDEPTH) &&
2599                                 ((cmd->cmnd[0] == READ_10) ||
2600                                 (cmd->cmnd[0] == WRITE_10)))
2601                                 pnode->cmd_qdepth =
2602                                         atomic_read(&pnode->cmd_pending);
2603
2604                         pnode->last_change_time = jiffies;
2605                 }
2606                 spin_unlock_irqrestore(shost->host_lock, flags);
2607         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2608                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2609                    time_after(jiffies, pnode->last_change_time +
2610                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2611                         spin_lock_irqsave(shost->host_lock, flags);
2612                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
2613                                 / 100;
2614                         depth = depth ? depth : 1;
2615                         pnode->cmd_qdepth += depth;
2616                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
2617                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2618                         pnode->last_change_time = jiffies;
2619                         spin_unlock_irqrestore(shost->host_lock, flags);
2620                 }
2621         }
2622
2623         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2624
2625         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
2626         queue_depth = cmd->device->queue_depth;
2627         scsi_id = cmd->device->id;
2628         cmd->scsi_done(cmd);
2629
2630         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2631                 /*
2632                  * If there is a thread waiting for command completion
2633                  * wake up the thread.
2634                  */
2635                 spin_lock_irqsave(shost->host_lock, flags);
2636                 lpfc_cmd->pCmd = NULL;
2637                 if (lpfc_cmd->waitq)
2638                         wake_up(lpfc_cmd->waitq);
2639                 spin_unlock_irqrestore(shost->host_lock, flags);
2640                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2641                 return;
2642         }
2643
2644         if (!result)
2645                 lpfc_rampup_queue_depth(vport, queue_depth);
2646
2647         /*
2648          * Check for queue full.  If the lun is reporting queue full, then
2649          * back off the lun queue depth to prevent target overloads.
2650          */
2651         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
2652             NLP_CHK_NODE_ACT(pnode)) {
2653                 shost_for_each_device(tmp_sdev, shost) {
2654                         if (tmp_sdev->id != scsi_id)
2655                                 continue;
2656                         depth = scsi_track_queue_full(tmp_sdev,
2657                                                       tmp_sdev->queue_depth-1);
2658                         if (depth <= 0)
2659                                 continue;
2660                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2661                                          "0711 detected queue full - lun queue "
2662                                          "depth adjusted to %d.\n", depth);
2663                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
2664                                                                pnode,
2665                                                                tmp_sdev->lun,
2666                                                                depth+1, depth);
2667                 }
2668         }
2669
2670         /*
2671          * If there is a thread waiting for command completion
2672          * wake up the thread.
2673          */
2674         spin_lock_irqsave(shost->host_lock, flags);
2675         lpfc_cmd->pCmd = NULL;
2676         if (lpfc_cmd->waitq)
2677                 wake_up(lpfc_cmd->waitq);
2678         spin_unlock_irqrestore(shost->host_lock, flags);
2679
2680         lpfc_release_scsi_buf(phba, lpfc_cmd);
2681 }
2682
2683 /**
2684  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2685  * @data: A pointer to the immediate command data portion of the IOCB.
2686  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
2687  *
2688  * The routine copies the entire FCP command from @fcp_cmnd to @data while
2689  * byte swapping the data to big endian format for transmission on the wire.
2690  **/
2691 static void
2692 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
2693 {
2694         int i, j;
2695         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
2696              i += sizeof(uint32_t), j++) {
2697                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
2698         }
2699 }
2700
2701 /**
2702  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2703  * @vport: The virtual port for which this call is being executed.
2704  * @lpfc_cmd: The scsi command which needs to send.
2705  * @pnode: Pointer to lpfc_nodelist.
2706  *
2707  * This routine initializes fcp_cmnd and iocb data structure from scsi command
2708  * to transfer for device with SLI3 interface spec.
2709  **/
2710 static void
2711 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
2712                     struct lpfc_nodelist *pnode)
2713 {
2714         struct lpfc_hba *phba = vport->phba;
2715         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2716         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2717         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2718         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
2719         int datadir = scsi_cmnd->sc_data_direction;
2720         char tag[2];
2721
2722         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
2723                 return;
2724
2725         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2726         /* clear task management bits */
2727         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
2728
2729         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
2730                         &lpfc_cmd->fcp_cmnd->fcp_lun);
2731
2732         memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
2733
2734         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
2735                 switch (tag[0]) {
2736                 case HEAD_OF_QUEUE_TAG:
2737                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
2738                         break;
2739                 case ORDERED_QUEUE_TAG:
2740                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
2741                         break;
2742                 default:
2743                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
2744                         break;
2745                 }
2746         } else
2747                 fcp_cmnd->fcpCntl1 = 0;
2748
2749         /*
2750          * There are three possibilities here - use scatter-gather segment, use
2751          * the single mapping, or neither.  Start the lpfc command prep by
2752          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
2753          * data bde entry.
2754          */
2755         if (scsi_sg_count(scsi_cmnd)) {
2756                 if (datadir == DMA_TO_DEVICE) {
2757                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2758                         if (phba->sli_rev < LPFC_SLI_REV4) {
2759                                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2760                                 iocb_cmd->ulpPU = 0;
2761                         } else
2762                                 iocb_cmd->ulpPU = PARM_READ_CHECK;
2763                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
2764                         phba->fc4OutputRequests++;
2765                 } else {
2766                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
2767                         iocb_cmd->ulpPU = PARM_READ_CHECK;
2768                         fcp_cmnd->fcpCntl3 = READ_DATA;
2769                         phba->fc4InputRequests++;
2770                 }
2771         } else {
2772                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
2773                 iocb_cmd->un.fcpi.fcpi_parm = 0;
2774                 iocb_cmd->ulpPU = 0;
2775                 fcp_cmnd->fcpCntl3 = 0;
2776                 phba->fc4ControlRequests++;
2777         }
2778         if (phba->sli_rev == 3 &&
2779             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2780                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
2781         /*
2782          * Finish initializing those IOCB fields that are independent
2783          * of the scsi_cmnd request_buffer
2784          */
2785         piocbq->iocb.ulpContext = pnode->nlp_rpi;
2786         if (phba->sli_rev == LPFC_SLI_REV4)
2787                 piocbq->iocb.ulpContext =
2788                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
2789         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
2790                 piocbq->iocb.ulpFCP2Rcvy = 1;
2791         else
2792                 piocbq->iocb.ulpFCP2Rcvy = 0;
2793
2794         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
2795         piocbq->context1  = lpfc_cmd;
2796         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2797         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
2798         piocbq->vport = vport;
2799 }
2800
2801 /**
2802  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
2803  * @vport: The virtual port for which this call is being executed.
2804  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
2805  * @lun: Logical unit number.
2806  * @task_mgmt_cmd: SCSI task management command.
2807  *
2808  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
2809  * for device with SLI-3 interface spec.
2810  *
2811  * Return codes:
2812  *   0 - Error
2813  *   1 - Success
2814  **/
2815 static int
2816 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
2817                              struct lpfc_scsi_buf *lpfc_cmd,
2818                              unsigned int lun,
2819                              uint8_t task_mgmt_cmd)
2820 {
2821         struct lpfc_iocbq *piocbq;
2822         IOCB_t *piocb;
2823         struct fcp_cmnd *fcp_cmnd;
2824         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
2825         struct lpfc_nodelist *ndlp = rdata->pnode;
2826
2827         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2828             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
2829                 return 0;
2830
2831         piocbq = &(lpfc_cmd->cur_iocbq);
2832         piocbq->vport = vport;
2833
2834         piocb = &piocbq->iocb;
2835
2836         fcp_cmnd = lpfc_cmd->fcp_cmnd;
2837         /* Clear out any old data in the FCP command area */
2838         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2839         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
2840         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2841         if (vport->phba->sli_rev == 3 &&
2842             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2843                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
2844         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
2845         piocb->ulpContext = ndlp->nlp_rpi;
2846         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
2847                 piocb->ulpContext =
2848                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
2849         }
2850         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
2851                 piocb->ulpFCP2Rcvy = 1;
2852         }
2853         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
2854
2855         /* ulpTimeout is only one byte */
2856         if (lpfc_cmd->timeout > 0xff) {
2857                 /*
2858                  * Do not timeout the command at the firmware level.
2859                  * The driver will provide the timeout mechanism.
2860                  */
2861                 piocb->ulpTimeout = 0;
2862         } else
2863                 piocb->ulpTimeout = lpfc_cmd->timeout;
2864
2865         if (vport->phba->sli_rev == LPFC_SLI_REV4)
2866                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2867
2868         return 1;
2869 }
2870
2871 /**
2872  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
2873  * @phba: The hba struct for which this call is being executed.
2874  * @dev_grp: The HBA PCI-Device group number.
2875  *
2876  * This routine sets up the SCSI interface API function jump table in @phba
2877  * struct.
2878  * Returns: 0 - success, -ENODEV - failure.
2879  **/
2880 int
2881 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
2882 {
2883
2884         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
2885         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
2886
2887         switch (dev_grp) {
2888         case LPFC_PCI_DEV_LP:
2889                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
2890                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
2891                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
2892                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
2893                 break;
2894         case LPFC_PCI_DEV_OC:
2895                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
2896                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
2897                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
2898                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
2899                 break;
2900         default:
2901                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
2902                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
2903                                 dev_grp);
2904                 return -ENODEV;
2905                 break;
2906         }
2907         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2908         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2909         return 0;
2910 }
2911
2912 /**
2913  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2914  * @phba: The Hba for which this call is being executed.
2915  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
2916  * @rspiocbq: Pointer to lpfc_iocbq data structure.
2917  *
2918  * This routine is IOCB completion routine for device reset and target reset
2919  * routine. This routine release scsi buffer associated with lpfc_cmd.
2920  **/
2921 static void
2922 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
2923                         struct lpfc_iocbq *cmdiocbq,
2924                         struct lpfc_iocbq *rspiocbq)
2925 {
2926         struct lpfc_scsi_buf *lpfc_cmd =
2927                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
2928         if (lpfc_cmd)
2929                 lpfc_release_scsi_buf(phba, lpfc_cmd);
2930         return;
2931 }
2932
2933 /**
2934  * lpfc_info - Info entry point of scsi_host_template data structure
2935  * @host: The scsi host for which this call is being executed.
2936  *
2937  * This routine provides module information about hba.
2938  *
2939  * Reutrn code:
2940  *   Pointer to char - Success.
2941  **/
2942 const char *
2943 lpfc_info(struct Scsi_Host *host)
2944 {
2945         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
2946         struct lpfc_hba   *phba = vport->phba;
2947         int len;
2948         static char  lpfcinfobuf[384];
2949
2950         memset(lpfcinfobuf,0,384);
2951         if (phba && phba->pcidev){
2952                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
2953                 len = strlen(lpfcinfobuf);
2954                 snprintf(lpfcinfobuf + len,
2955                         384-len,
2956                         " on PCI bus %02x device %02x irq %d",
2957                         phba->pcidev->bus->number,
2958                         phba->pcidev->devfn,
2959                         phba->pcidev->irq);
2960                 len = strlen(lpfcinfobuf);
2961                 if (phba->Port[0]) {
2962                         snprintf(lpfcinfobuf + len,
2963                                  384-len,
2964                                  " port %s",
2965                                  phba->Port);
2966                 }
2967                 len = strlen(lpfcinfobuf);
2968                 if (phba->sli4_hba.link_state.logical_speed) {
2969                         snprintf(lpfcinfobuf + len,
2970                                  384-len,
2971                                  " Logical Link Speed: %d Mbps",
2972                                  phba->sli4_hba.link_state.logical_speed * 10);
2973                 }
2974         }
2975         return lpfcinfobuf;
2976 }
2977
2978 /**
2979  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2980  * @phba: The Hba for which this call is being executed.
2981  *
2982  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
2983  * The default value of cfg_poll_tmo is 10 milliseconds.
2984  **/
2985 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
2986 {
2987         unsigned long  poll_tmo_expires =
2988                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
2989
2990         if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
2991                 mod_timer(&phba->fcp_poll_timer,
2992                           poll_tmo_expires);
2993 }
2994
2995 /**
2996  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2997  * @phba: The Hba for which this call is being executed.
2998  *
2999  * This routine starts the fcp_poll_timer of @phba.
3000  **/
3001 void lpfc_poll_start_timer(struct lpfc_hba * phba)
3002 {
3003         lpfc_poll_rearm_timer(phba);
3004 }
3005
3006 /**
3007  * lpfc_poll_timeout - Restart polling timer
3008  * @ptr: Map to lpfc_hba data structure pointer.
3009  *
3010  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
3011  * and FCP Ring interrupt is disable.
3012  **/
3013
3014 void lpfc_poll_timeout(unsigned long ptr)
3015 {
3016         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
3017
3018         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3019                 lpfc_sli_handle_fast_ring_event(phba,
3020                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3021
3022                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3023                         lpfc_poll_rearm_timer(phba);
3024         }
3025 }
3026
3027 /**
3028  * lpfc_queuecommand - scsi_host_template queuecommand entry point
3029  * @cmnd: Pointer to scsi_cmnd data structure.
3030  * @done: Pointer to done routine.
3031  *
3032  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
3033  * This routine prepares an IOCB from scsi command and provides to firmware.
3034  * The @done callback is invoked after driver finished processing the command.
3035  *
3036  * Return value :
3037  *   0 - Success
3038  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
3039  **/
3040 static int
3041 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
3042 {
3043         struct Scsi_Host  *shost = cmnd->device->host;
3044         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3045         struct lpfc_hba   *phba = vport->phba;
3046         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3047         struct lpfc_nodelist *ndlp;
3048         struct lpfc_scsi_buf *lpfc_cmd;
3049         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3050         int err;
3051
3052         err = fc_remote_port_chkready(rport);
3053         if (err) {
3054                 cmnd->result = err;
3055                 goto out_fail_command;
3056         }
3057         ndlp = rdata->pnode;
3058
3059         if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
3060                 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3061
3062                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
3063                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
3064                                 " op:%02x str=%s without registering for"
3065                                 " BlockGuard - Rejecting command\n",
3066                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3067                                 dif_op_str[scsi_get_prot_op(cmnd)]);
3068                 goto out_fail_command;
3069         }
3070
3071         /*
3072          * Catch race where our node has transitioned, but the
3073          * transport is still transitioning.
3074          */
3075         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
3076                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
3077                 goto out_fail_command;
3078         }
3079         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
3080                 goto out_tgt_busy;
3081
3082         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
3083         if (lpfc_cmd == NULL) {
3084                 lpfc_rampdown_queue_depth(phba);
3085
3086                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3087                                  "0707 driver's buffer pool is empty, "
3088                                  "IO busied\n");
3089                 goto out_host_busy;
3090         }
3091
3092         /*
3093          * Store the midlayer's command structure for the completion phase
3094          * and complete the command initialization.
3095          */
3096         lpfc_cmd->pCmd  = cmnd;
3097         lpfc_cmd->rdata = rdata;
3098         lpfc_cmd->timeout = 0;
3099         lpfc_cmd->start_time = jiffies;
3100         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
3101         cmnd->scsi_done = done;
3102
3103         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3104                 if (vport->phba->cfg_enable_bg) {
3105                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3106                                 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
3107                                 "str=%s\n",
3108                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3109                                 dif_op_str[scsi_get_prot_op(cmnd)]);
3110                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3111                                 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
3112                                 "%02x %02x %02x %02x %02x\n",
3113                                 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
3114                                 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
3115                                 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
3116                                 cmnd->cmnd[9]);
3117                         if (cmnd->cmnd[0] == READ_10)
3118                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3119                                         "9035 BLKGRD: READ @ sector %llu, "
3120                                         "count %u\n",
3121                                         (unsigned long long)scsi_get_lba(cmnd),
3122                                         blk_rq_sectors(cmnd->request));
3123                         else if (cmnd->cmnd[0] == WRITE_10)
3124                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3125                                         "9036 BLKGRD: WRITE @ sector %llu, "
3126                                         "count %u cmd=%p\n",
3127                                         (unsigned long long)scsi_get_lba(cmnd),
3128                                         blk_rq_sectors(cmnd->request),
3129                                         cmnd);
3130                 }
3131
3132                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3133         } else {
3134                 if (vport->phba->cfg_enable_bg) {
3135                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3136                                         "9038 BLKGRD: rcvd unprotected cmd:"
3137                                         "%02x op:%02x str=%s\n",
3138                                         cmnd->cmnd[0], scsi_get_prot_op(cmnd),
3139                                         dif_op_str[scsi_get_prot_op(cmnd)]);
3140                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3141                                         "9039 BLKGRD: CDB: %02x %02x %02x "
3142                                         "%02x %02x %02x %02x %02x %02x %02x\n",
3143                                         cmnd->cmnd[0], cmnd->cmnd[1],
3144                                         cmnd->cmnd[2], cmnd->cmnd[3],
3145                                         cmnd->cmnd[4], cmnd->cmnd[5],
3146                                         cmnd->cmnd[6], cmnd->cmnd[7],
3147                                         cmnd->cmnd[8], cmnd->cmnd[9]);
3148                         if (cmnd->cmnd[0] == READ_10)
3149                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3150                                         "9040 dbg: READ @ sector %llu, "
3151                                         "count %u\n",
3152                                         (unsigned long long)scsi_get_lba(cmnd),
3153                                          blk_rq_sectors(cmnd->request));
3154                         else if (cmnd->cmnd[0] == WRITE_10)
3155                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3156                                          "9041 dbg: WRITE @ sector %llu, "
3157                                          "count %u cmd=%p\n",
3158                                          (unsigned long long)scsi_get_lba(cmnd),
3159                                          blk_rq_sectors(cmnd->request), cmnd);
3160                         else
3161                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3162                                          "9042 dbg: parser not implemented\n");
3163                 }
3164                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3165         }
3166
3167         if (err)
3168                 goto out_host_busy_free_buf;
3169
3170         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
3171
3172         atomic_inc(&ndlp->cmd_pending);
3173         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3174                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3175         if (err) {
3176                 atomic_dec(&ndlp->cmd_pending);
3177                 goto out_host_busy_free_buf;
3178         }
3179         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3180                 spin_unlock(shost->host_lock);
3181                 lpfc_sli_handle_fast_ring_event(phba,
3182                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3183
3184                 spin_lock(shost->host_lock);
3185                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3186                         lpfc_poll_rearm_timer(phba);
3187         }
3188
3189         return 0;
3190
3191  out_host_busy_free_buf:
3192         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3193         lpfc_release_scsi_buf(phba, lpfc_cmd);
3194  out_host_busy:
3195         return SCSI_MLQUEUE_HOST_BUSY;
3196
3197  out_tgt_busy:
3198         return SCSI_MLQUEUE_TARGET_BUSY;
3199
3200  out_fail_command:
3201         done(cmnd);
3202         return 0;
3203 }
3204
3205 static DEF_SCSI_QCMD(lpfc_queuecommand)
3206
3207 /**
3208  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3209  * @cmnd: Pointer to scsi_cmnd data structure.
3210  *
3211  * This routine aborts @cmnd pending in base driver.
3212  *
3213  * Return code :
3214  *   0x2003 - Error
3215  *   0x2002 - Success
3216  **/
3217 static int
3218 lpfc_abort_handler(struct scsi_cmnd *cmnd)
3219 {
3220         struct Scsi_Host  *shost = cmnd->device->host;
3221         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3222         struct lpfc_hba   *phba = vport->phba;
3223         struct lpfc_iocbq *iocb;
3224         struct lpfc_iocbq *abtsiocb;
3225         struct lpfc_scsi_buf *lpfc_cmd;
3226         IOCB_t *cmd, *icmd;
3227         int ret = SUCCESS;
3228         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
3229
3230         ret = fc_block_scsi_eh(cmnd);
3231         if (ret)
3232                 return ret;
3233         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
3234         if (!lpfc_cmd) {
3235                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3236                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
3237                          "x%x ID %d LUN %d\n",
3238                          ret, cmnd->device->id, cmnd->device->lun);
3239                 return SUCCESS;
3240         }
3241
3242         /*
3243          * If pCmd field of the corresponding lpfc_scsi_buf structure
3244          * points to a different SCSI command, then the driver has
3245          * already completed this command, but the midlayer did not
3246          * see the completion before the eh fired.  Just return
3247          * SUCCESS.
3248          */
3249         iocb = &lpfc_cmd->cur_iocbq;
3250         if (lpfc_cmd->pCmd != cmnd)
3251                 goto out;
3252
3253         BUG_ON(iocb->context1 != lpfc_cmd);
3254
3255         abtsiocb = lpfc_sli_get_iocbq(phba);
3256         if (abtsiocb == NULL) {
3257                 ret = FAILED;
3258                 goto out;
3259         }
3260
3261         /*
3262          * The scsi command can not be in txq and it is in flight because the
3263          * pCmd is still pointig at the SCSI command we have to abort. There
3264          * is no need to search the txcmplq. Just send an abort to the FW.
3265          */
3266
3267         cmd = &iocb->iocb;
3268         icmd = &abtsiocb->iocb;
3269         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
3270         icmd->un.acxri.abortContextTag = cmd->ulpContext;
3271         if (phba->sli_rev == LPFC_SLI_REV4)
3272                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
3273         else
3274                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
3275
3276         icmd->ulpLe = 1;
3277         icmd->ulpClass = cmd->ulpClass;
3278
3279         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3280         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3281         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3282
3283         if (lpfc_is_link_up(phba))
3284                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
3285         else
3286                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
3287
3288         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
3289         abtsiocb->vport = vport;
3290         if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
3291             IOCB_ERROR) {
3292                 lpfc_sli_release_iocbq(phba, abtsiocb);
3293                 ret = FAILED;
3294                 goto out;
3295         }
3296
3297         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3298                 lpfc_sli_handle_fast_ring_event(phba,
3299                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3300
3301         lpfc_cmd->waitq = &waitq;
3302         /* Wait for abort to complete */
3303         wait_event_timeout(waitq,
3304                           (lpfc_cmd->pCmd != cmnd),
3305                            (2*vport->cfg_devloss_tmo*HZ));
3306
3307         spin_lock_irq(shost->host_lock);
3308         lpfc_cmd->waitq = NULL;
3309         spin_unlock_irq(shost->host_lock);
3310
3311         if (lpfc_cmd->pCmd == cmnd) {
3312                 ret = FAILED;
3313                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3314                                  "0748 abort handler timed out waiting "
3315                                  "for abort to complete: ret %#x, ID %d, "
3316                                  "LUN %d\n",
3317                                  ret, cmnd->device->id, cmnd->device->lun);
3318         }
3319
3320  out:
3321         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3322                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3323                          "LUN %d\n", ret, cmnd->device->id,
3324                          cmnd->device->lun);
3325         return ret;
3326 }
3327
3328 static char *
3329 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
3330 {
3331         switch (task_mgmt_cmd) {
3332         case FCP_ABORT_TASK_SET:
3333                 return "ABORT_TASK_SET";
3334         case FCP_CLEAR_TASK_SET:
3335                 return "FCP_CLEAR_TASK_SET";
3336         case FCP_BUS_RESET:
3337                 return "FCP_BUS_RESET";
3338         case FCP_LUN_RESET:
3339                 return "FCP_LUN_RESET";
3340         case FCP_TARGET_RESET:
3341                 return "FCP_TARGET_RESET";
3342         case FCP_CLEAR_ACA:
3343                 return "FCP_CLEAR_ACA";
3344         case FCP_TERMINATE_TASK:
3345                 return "FCP_TERMINATE_TASK";
3346         default:
3347                 return "unknown";
3348         }
3349 }
3350
3351 /**
3352  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
3353  * @vport: The virtual port for which this call is being executed.
3354  * @rdata: Pointer to remote port local data
3355  * @tgt_id: Target ID of remote device.
3356  * @lun_id: Lun number for the TMF
3357  * @task_mgmt_cmd: type of TMF to send
3358  *
3359  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
3360  * a remote port.
3361  *
3362  * Return Code:
3363  *   0x2003 - Error
3364  *   0x2002 - Success.
3365  **/
3366 static int
3367 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
3368                     unsigned  tgt_id, unsigned int lun_id,
3369                     uint8_t task_mgmt_cmd)
3370 {
3371         struct lpfc_hba   *phba = vport->phba;
3372         struct lpfc_scsi_buf *lpfc_cmd;
3373         struct lpfc_iocbq *iocbq;
3374         struct lpfc_iocbq *iocbqrsp;
3375         struct lpfc_nodelist *pnode = rdata->pnode;
3376         int ret;
3377         int status;
3378
3379         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3380                 return FAILED;
3381
3382         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
3383         if (lpfc_cmd == NULL)
3384                 return FAILED;
3385         lpfc_cmd->timeout = 60;
3386         lpfc_cmd->rdata = rdata;
3387
3388         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
3389                                            task_mgmt_cmd);
3390         if (!status) {
3391                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3392                 return FAILED;
3393         }
3394
3395         iocbq = &lpfc_cmd->cur_iocbq;
3396         iocbqrsp = lpfc_sli_get_iocbq(phba);
3397         if (iocbqrsp == NULL) {
3398                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3399                 return FAILED;
3400         }
3401
3402         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3403                          "0702 Issue %s to TGT %d LUN %d "
3404                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
3405                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3406                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
3407                          iocbq->iocb_flag);
3408
3409         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3410                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
3411         if (status != IOCB_SUCCESS) {
3412                 if (status == IOCB_TIMEDOUT) {
3413                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3414                         ret = TIMEOUT_ERROR;
3415                 } else
3416                         ret = FAILED;
3417                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3418                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3419                          "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
3420                          "iocb_flag x%x\n",
3421                          lpfc_taskmgmt_name(task_mgmt_cmd),
3422                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3423                          iocbqrsp->iocb.un.ulpWord[4],
3424                          iocbq->iocb_flag);
3425         } else if (status == IOCB_BUSY)
3426                 ret = FAILED;
3427         else
3428                 ret = SUCCESS;
3429
3430         lpfc_sli_release_iocbq(phba, iocbqrsp);
3431
3432         if (ret != TIMEOUT_ERROR)
3433                 lpfc_release_scsi_buf(phba, lpfc_cmd);
3434
3435         return ret;
3436 }
3437
3438 /**
3439  * lpfc_chk_tgt_mapped -
3440  * @vport: The virtual port to check on
3441  * @cmnd: Pointer to scsi_cmnd data structure.
3442  *
3443  * This routine delays until the scsi target (aka rport) for the
3444  * command exists (is present and logged in) or we declare it non-existent.
3445  *
3446  * Return code :
3447  *  0x2003 - Error
3448  *  0x2002 - Success
3449  **/
3450 static int
3451 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
3452 {
3453         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3454         struct lpfc_nodelist *pnode;
3455         unsigned long later;
3456
3457         if (!rdata) {
3458                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3459                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
3460                 return FAILED;
3461         }
3462         pnode = rdata->pnode;
3463         /*
3464          * If target is not in a MAPPED state, delay until
3465          * target is rediscovered or devloss timeout expires.
3466          */
3467         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3468         while (time_after(later, jiffies)) {
3469                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3470                         return FAILED;
3471                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
3472                         return SUCCESS;
3473                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
3474                 rdata = cmnd->device->hostdata;
3475                 if (!rdata)
3476                         return FAILED;
3477                 pnode = rdata->pnode;
3478         }
3479         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
3480             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3481                 return FAILED;
3482         return SUCCESS;
3483 }
3484
3485 /**
3486  * lpfc_reset_flush_io_context -
3487  * @vport: The virtual port (scsi_host) for the flush context
3488  * @tgt_id: If aborting by Target contect - specifies the target id
3489  * @lun_id: If aborting by Lun context - specifies the lun id
3490  * @context: specifies the context level to flush at.
3491  *
3492  * After a reset condition via TMF, we need to flush orphaned i/o
3493  * contexts from the adapter. This routine aborts any contexts
3494  * outstanding, then waits for their completions. The wait is
3495  * bounded by devloss_tmo though.
3496  *
3497  * Return code :
3498  *  0x2003 - Error
3499  *  0x2002 - Success
3500  **/
3501 static int
3502 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
3503                         uint64_t lun_id, lpfc_ctx_cmd context)
3504 {
3505         struct lpfc_hba   *phba = vport->phba;
3506         unsigned long later;
3507         int cnt;
3508
3509         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3510         if (cnt)
3511                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3512                                     tgt_id, lun_id, context);
3513         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
3514         while (time_after(later, jiffies) && cnt) {
3515                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3516                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3517         }
3518         if (cnt) {
3519                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3520                         "0724 I/O flush failure for context %s : cnt x%x\n",
3521                         ((context == LPFC_CTX_LUN) ? "LUN" :
3522                          ((context == LPFC_CTX_TGT) ? "TGT" :
3523                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
3524                         cnt);
3525                 return FAILED;
3526         }
3527         return SUCCESS;
3528 }
3529
3530 /**
3531  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3532  * @cmnd: Pointer to scsi_cmnd data structure.
3533  *
3534  * This routine does a device reset by sending a LUN_RESET task management
3535  * command.
3536  *
3537  * Return code :
3538  *  0x2003 - Error
3539  *  0x2002 - Success
3540  **/
3541 static int
3542 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
3543 {
3544         struct Scsi_Host  *shost = cmnd->device->host;
3545         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3546         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3547         struct lpfc_nodelist *pnode;
3548         unsigned tgt_id = cmnd->device->id;
3549         unsigned int lun_id = cmnd->device->lun;
3550         struct lpfc_scsi_event_header scsi_event;
3551         int status;
3552
3553         if (!rdata) {
3554                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3555                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
3556                 return FAILED;
3557         }
3558         pnode = rdata->pnode;
3559         status = fc_block_scsi_eh(cmnd);
3560         if (status)
3561                 return status;
3562
3563         status = lpfc_chk_tgt_mapped(vport, cmnd);
3564         if (status == FAILED) {
3565                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3566                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
3567                 return FAILED;
3568         }
3569
3570         scsi_event.event_type = FC_REG_SCSI_EVENT;
3571         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
3572         scsi_event.lun = lun_id;
3573         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3574         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3575
3576         fc_host_post_vendor_event(shost, fc_get_event_number(),
3577                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3578
3579         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3580                                                 FCP_LUN_RESET);
3581
3582         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3583                          "0713 SCSI layer issued Device Reset (%d, %d) "
3584                          "return x%x\n", tgt_id, lun_id, status);
3585
3586         /*
3587          * We have to clean up i/o as : they may be orphaned by the TMF;
3588          * or if the TMF failed, they may be in an indeterminate state.
3589          * So, continue on.
3590          * We will report success if all the i/o aborts successfully.
3591          */
3592         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3593                                                 LPFC_CTX_LUN);
3594         return status;
3595 }
3596
3597 /**
3598  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
3599  * @cmnd: Pointer to scsi_cmnd data structure.
3600  *
3601  * This routine does a target reset by sending a TARGET_RESET task management
3602  * command.
3603  *
3604  * Return code :
3605  *  0x2003 - Error
3606  *  0x2002 - Success
3607  **/
3608 static int
3609 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
3610 {
3611         struct Scsi_Host  *shost = cmnd->device->host;
3612         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3613         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3614         struct lpfc_nodelist *pnode;
3615         unsigned tgt_id = cmnd->device->id;
3616         unsigned int lun_id = cmnd->device->lun;
3617         struct lpfc_scsi_event_header scsi_event;
3618         int status;
3619
3620         if (!rdata) {
3621                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3622                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
3623                 return FAILED;
3624         }
3625         pnode = rdata->pnode;
3626         status = fc_block_scsi_eh(cmnd);
3627         if (status)
3628                 return status;
3629
3630         status = lpfc_chk_tgt_mapped(vport, cmnd);
3631         if (status == FAILED) {
3632                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3633                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
3634                 return FAILED;
3635         }
3636
3637         scsi_event.event_type = FC_REG_SCSI_EVENT;
3638         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
3639         scsi_event.lun = 0;
3640         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
3641         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
3642
3643         fc_host_post_vendor_event(shost, fc_get_event_number(),
3644                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3645
3646         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
3647                                         FCP_TARGET_RESET);
3648
3649         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3650                          "0723 SCSI layer issued Target Reset (%d, %d) "
3651                          "return x%x\n", tgt_id, lun_id, status);
3652
3653         /*
3654          * We have to clean up i/o as : they may be orphaned by the TMF;
3655          * or if the TMF failed, they may be in an indeterminate state.
3656          * So, continue on.
3657          * We will report success if all the i/o aborts successfully.
3658          */
3659         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
3660                                         LPFC_CTX_TGT);
3661         return status;
3662 }
3663
3664 /**
3665  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3666  * @cmnd: Pointer to scsi_cmnd data structure.
3667  *
3668  * This routine does target reset to all targets on @cmnd->device->host.
3669  * This emulates Parallel SCSI Bus Reset Semantics.
3670  *
3671  * Return code :
3672  *  0x2003 - Error
3673  *  0x2002 - Success
3674  **/
3675 static int
3676 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
3677 {
3678         struct Scsi_Host  *shost = cmnd->device->host;
3679         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
3680         struct lpfc_nodelist *ndlp = NULL;
3681         struct lpfc_scsi_event_header scsi_event;
3682         int match;
3683         int ret = SUCCESS, status, i;
3684
3685         scsi_event.event_type = FC_REG_SCSI_EVENT;
3686         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
3687         scsi_event.lun = 0;
3688         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
3689         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
3690
3691         fc_host_post_vendor_event(shost, fc_get_event_number(),
3692                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
3693
3694         ret = fc_block_scsi_eh(cmnd);
3695         if (ret)
3696                 return ret;
3697
3698         /*
3699          * Since the driver manages a single bus device, reset all
3700          * targets known to the driver.  Should any target reset
3701          * fail, this routine returns failure to the midlayer.
3702          */
3703         for (i = 0; i < LPFC_MAX_TARGET; i++) {
3704                 /* Search for mapped node by target ID */
3705                 match = 0;
3706                 spin_lock_irq(shost->host_lock);
3707                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3708                         if (!NLP_CHK_NODE_ACT(ndlp))
3709                                 continue;
3710                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3711                             ndlp->nlp_sid == i &&
3712                             ndlp->rport) {
3713                                 match = 1;
3714                                 break;
3715                         }
3716                 }
3717                 spin_unlock_irq(shost->host_lock);
3718                 if (!match)
3719                         continue;
3720
3721                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
3722                                         i, 0, FCP_TARGET_RESET);
3723
3724                 if (status != SUCCESS) {
3725                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3726                                          "0700 Bus Reset on target %d failed\n",
3727                                          i);
3728                         ret = FAILED;
3729                 }
3730         }
3731         /*
3732          * We have to clean up i/o as : they may be orphaned by the TMFs
3733          * above; or if any of the TMFs failed, they may be in an
3734          * indeterminate state.
3735          * We will report success if all the i/o aborts successfully.
3736          */
3737
3738         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
3739         if (status != SUCCESS)
3740                 ret = FAILED;
3741
3742         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3743                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
3744         return ret;
3745 }
3746
3747 /**
3748  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3749  * @sdev: Pointer to scsi_device.
3750  *
3751  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
3752  * globally available list of scsi buffers. This routine also makes sure scsi
3753  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
3754  * of scsi buffer exists for the lifetime of the driver.
3755  *
3756  * Return codes:
3757  *   non-0 - Error
3758  *   0 - Success
3759  **/
3760 static int
3761 lpfc_slave_alloc(struct scsi_device *sdev)
3762 {
3763         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3764         struct lpfc_hba   *phba = vport->phba;
3765         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3766         uint32_t total = 0;
3767         uint32_t num_to_alloc = 0;
3768         int num_allocated = 0;
3769         uint32_t sdev_cnt;
3770
3771         if (!rport || fc_remote_port_chkready(rport))
3772                 return -ENXIO;
3773
3774         sdev->hostdata = rport->dd_data;
3775         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
3776
3777         /*
3778          * Populate the cmds_per_lun count scsi_bufs into this host's globally
3779          * available list of scsi buffers.  Don't allocate more than the
3780          * HBA limit conveyed to the midlayer via the host structure.  The
3781          * formula accounts for the lun_queue_depth + error handlers + 1
3782          * extra.  This list of scsi bufs exists for the lifetime of the driver.
3783          */
3784         total = phba->total_scsi_bufs;
3785         num_to_alloc = vport->cfg_lun_queue_depth + 2;
3786
3787         /* If allocated buffers are enough do nothing */
3788         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
3789                 return 0;
3790
3791         /* Allow some exchanges to be available always to complete discovery */
3792         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3793                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3794                                  "0704 At limitation of %d preallocated "
3795                                  "command buffers\n", total);
3796                 return 0;
3797         /* Allow some exchanges to be available always to complete discovery */
3798         } else if (total + num_to_alloc >
3799                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3800                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3801                                  "0705 Allocation request of %d "
3802                                  "command buffers will exceed max of %d.  "
3803                                  "Reducing allocation request to %d.\n",
3804                                  num_to_alloc, phba->cfg_hba_queue_depth,
3805                                  (phba->cfg_hba_queue_depth - total));
3806                 num_to_alloc = phba->cfg_hba_queue_depth - total;
3807         }
3808         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
3809         if (num_to_alloc != num_allocated) {
3810                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3811                                  "0708 Allocation request of %d "
3812                                  "command buffers did not succeed.  "
3813                                  "Allocated %d buffers.\n",
3814                                  num_to_alloc, num_allocated);
3815         }
3816         if (num_allocated > 0)
3817                 phba->total_scsi_bufs += num_allocated;
3818         return 0;
3819 }
3820
3821 /**
3822  * lpfc_slave_configure - scsi_host_template slave_configure entry point
3823  * @sdev: Pointer to scsi_device.
3824  *
3825  * This routine configures following items
3826  *   - Tag command queuing support for @sdev if supported.
3827  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
3828  *
3829  * Return codes:
3830  *   0 - Success
3831  **/
3832 static int
3833 lpfc_slave_configure(struct scsi_device *sdev)
3834 {
3835         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3836         struct lpfc_hba   *phba = vport->phba;
3837
3838         if (sdev->tagged_supported)
3839                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
3840         else
3841                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
3842
3843         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3844                 lpfc_sli_handle_fast_ring_event(phba,
3845                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3846                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3847                         lpfc_poll_rearm_timer(phba);
3848         }
3849
3850         return 0;
3851 }
3852
3853 /**
3854  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3855  * @sdev: Pointer to scsi_device.
3856  *
3857  * This routine sets @sdev hostatdata filed to null.
3858  **/
3859 static void
3860 lpfc_slave_destroy(struct scsi_device *sdev)
3861 {
3862         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
3863         struct lpfc_hba   *phba = vport->phba;
3864         atomic_dec(&phba->sdev_cnt);
3865         sdev->hostdata = NULL;
3866         return;
3867 }
3868
3869
3870 struct scsi_host_template lpfc_template = {
3871         .module                 = THIS_MODULE,
3872         .name                   = LPFC_DRIVER_NAME,
3873         .info                   = lpfc_info,
3874         .queuecommand           = lpfc_queuecommand,
3875         .eh_abort_handler       = lpfc_abort_handler,
3876         .eh_device_reset_handler = lpfc_device_reset_handler,
3877         .eh_target_reset_handler = lpfc_target_reset_handler,
3878         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3879         .slave_alloc            = lpfc_slave_alloc,
3880         .slave_configure        = lpfc_slave_configure,
3881         .slave_destroy          = lpfc_slave_destroy,
3882         .scan_finished          = lpfc_scan_finished,
3883         .this_id                = -1,
3884         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3885         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3886         .use_clustering         = ENABLE_CLUSTERING,
3887         .shost_attrs            = lpfc_hba_attrs,
3888         .max_sectors            = 0xFFFF,
3889         .vendor_id              = LPFC_NL_VENDOR_ID,
3890         .change_queue_depth     = lpfc_change_queue_depth,
3891 };
3892
3893 struct scsi_host_template lpfc_vport_template = {
3894         .module                 = THIS_MODULE,
3895         .name                   = LPFC_DRIVER_NAME,
3896         .info                   = lpfc_info,
3897         .queuecommand           = lpfc_queuecommand,
3898         .eh_abort_handler       = lpfc_abort_handler,
3899         .eh_device_reset_handler = lpfc_device_reset_handler,
3900         .eh_target_reset_handler = lpfc_target_reset_handler,
3901         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
3902         .slave_alloc            = lpfc_slave_alloc,
3903         .slave_configure        = lpfc_slave_configure,
3904         .slave_destroy          = lpfc_slave_destroy,
3905         .scan_finished          = lpfc_scan_finished,
3906         .this_id                = -1,
3907         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
3908         .cmd_per_lun            = LPFC_CMD_PER_LUN,
3909         .use_clustering         = ENABLE_CLUSTERING,
3910         .shost_attrs            = lpfc_vport_attrs,
3911         .max_sectors            = 0xFFFF,
3912         .change_queue_depth     = lpfc_change_queue_depth,
3913 };