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