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) 2017-2019 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  *******************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/export.h>
  27 #include <linux/delay.h>
  28 #include <asm/unaligned.h>
  29 #include <linux/t10-pi.h>
  30 #include <linux/crc-t10dif.h>
  31 #include <net/checksum.h>
  32
  33 #include <scsi/scsi.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_eh.h>
  36 #include <scsi/scsi_host.h>
  37 #include <scsi/scsi_tcq.h>
  38 #include <scsi/scsi_transport_fc.h>
  39
  40 #include "lpfc_version.h"
  41 #include "lpfc_hw4.h"
  42 #include "lpfc_hw.h"
  43 #include "lpfc_sli.h"
  44 #include "lpfc_sli4.h"
  45 #include "lpfc_nl.h"
  46 #include "lpfc_disc.h"
  47 #include "lpfc.h"
  48 #include "lpfc_scsi.h"
  49 #include "lpfc_logmsg.h"
  50 #include "lpfc_crtn.h"
  51 #include "lpfc_vport.h"
  52
  53 #define LPFC_RESET_WAIT  2
  54 #define LPFC_ABORT_WAIT  2
  55
  56 static char *dif_op_str[] = {
  57         "PROT_NORMAL",
  58         "PROT_READ_INSERT",
  59         "PROT_WRITE_STRIP",
  60         "PROT_READ_STRIP",
  61         "PROT_WRITE_INSERT",
  62         "PROT_READ_PASS",
  63         "PROT_WRITE_PASS",
  64 };
  65
  66 struct scsi_dif_tuple {
  67         __be16 guard_tag;       /* Checksum */
  68         __be16 app_tag;         /* Opaque storage */
  69         __be32 ref_tag;         /* Target LBA or indirect LBA */
  70 };
  71
  72 static struct lpfc_rport_data *
  73 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  74 {
  75         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  76
  77         if (vport->phba->cfg_fof)
  78                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  79         else
  80                 return (struct lpfc_rport_data *)sdev->hostdata;
  81 }
  82
  83 static void
  84 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
  85 static void
  86 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
  87 static int
  88 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  89
  90 static inline unsigned
  91 lpfc_cmd_blksize(struct scsi_cmnd *sc)
  92 {
  93         return sc->device->sector_size;
  94 }
  95
  96 #define LPFC_CHECK_PROTECT_GUARD        1
  97 #define LPFC_CHECK_PROTECT_REF          2
  98 static inline unsigned
  99 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 100 {
 101         return 1;
 102 }
 103
 104 static inline unsigned
 105 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 106 {
 107         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 108                 return 0;
 109         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 110                 return 1;
 111         return 0;
 112 }
 113
 114 /**
 115  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 116  * @phba: Pointer to HBA object.
 117  * @lpfc_cmd: lpfc scsi command object pointer.
 118  *
 119  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 120  * set the last bit in the response sge entry.
 121  **/
 122 static void
 123 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 124                                 struct lpfc_io_buf *lpfc_cmd)
 125 {
 126         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
 127         if (sgl) {
 128                 sgl += 1;
 129                 sgl->word2 = le32_to_cpu(sgl->word2);
 130                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 131                 sgl->word2 = cpu_to_le32(sgl->word2);
 132         }
 133 }
 134
 135 /**
 136  * lpfc_update_stats - Update statistical data for the command completion
 137  * @vport: The virtual port on which this call is executing.
 138  * @lpfc_cmd: lpfc scsi command object pointer.
 139  *
 140  * This function is called when there is a command completion and this
 141  * function updates the statistical data for the command completion.
 142  **/
 143 static void
 144 lpfc_update_stats(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
 145 {
 146         struct lpfc_hba *phba = vport->phba;
 147         struct lpfc_rport_data *rdata;
 148         struct lpfc_nodelist *pnode;
 149         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 150         unsigned long flags;
 151         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 152         unsigned long latency;
 153         int i;
 154
 155         if (!vport->stat_data_enabled ||
 156             vport->stat_data_blocked ||
 157             (cmd->result))
 158                 return;
 159
 160         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 161         rdata = lpfc_cmd->rdata;
 162         pnode = rdata->pnode;
 163
 164         spin_lock_irqsave(shost->host_lock, flags);
 165         if (!pnode ||
 166             !pnode->lat_data ||
 167             (phba->bucket_type == LPFC_NO_BUCKET)) {
 168                 spin_unlock_irqrestore(shost->host_lock, flags);
 169                 return;
 170         }
 171
 172         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 173                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 174                         phba->bucket_step;
 175                 /* check array subscript bounds */
 176                 if (i < 0)
 177                         i = 0;
 178                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 179                         i = LPFC_MAX_BUCKET_COUNT - 1;
 180         } else {
 181                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 182                         if (latency <= (phba->bucket_base +
 183                                 ((1<<i)*phba->bucket_step)))
 184                                 break;
 185         }
 186
 187         pnode->lat_data[i].cmd_count++;
 188         spin_unlock_irqrestore(shost->host_lock, flags);
 189 }
 190
 191 /**
 192  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 193  * @phba: The Hba for which this call is being executed.
 194  *
 195  * This routine is called when there is resource error in driver or firmware.
 196  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 197  * posts at most 1 event each second. This routine wakes up worker thread of
 198  * @phba to process WORKER_RAM_DOWN_EVENT event.
 199  *
 200  * This routine should be called with no lock held.
 201  **/
 202 void
 203 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 204 {
 205         unsigned long flags;
 206         uint32_t evt_posted;
 207         unsigned long expires;
 208
 209         spin_lock_irqsave(&phba->hbalock, flags);
 210         atomic_inc(&phba->num_rsrc_err);
 211         phba->last_rsrc_error_time = jiffies;
 212
 213         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 214         if (time_after(expires, jiffies)) {
 215                 spin_unlock_irqrestore(&phba->hbalock, flags);
 216                 return;
 217         }
 218
 219         phba->last_ramp_down_time = jiffies;
 220
 221         spin_unlock_irqrestore(&phba->hbalock, flags);
 222
 223         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 224         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 225         if (!evt_posted)
 226                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 227         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 228
 229         if (!evt_posted)
 230                 lpfc_worker_wake_up(phba);
 231         return;
 232 }
 233
 234 /**
 235  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 236  * @phba: The Hba for which this call is being executed.
 237  *
 238  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 239  * thread.This routine reduces queue depth for all scsi device on each vport
 240  * associated with @phba.
 241  **/
 242 void
 243 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 244 {
 245         struct lpfc_vport **vports;
 246         struct Scsi_Host  *shost;
 247         struct scsi_device *sdev;
 248         unsigned long new_queue_depth;
 249         unsigned long num_rsrc_err, num_cmd_success;
 250         int i;
 251
 252         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 253         num_cmd_success = atomic_read(&phba->num_cmd_success);
 254
 255         /*
 256          * The error and success command counters are global per
 257          * driver instance.  If another handler has already
 258          * operated on this error event, just exit.
 259          */
 260         if (num_rsrc_err == 0)
 261                 return;
 262
 263         vports = lpfc_create_vport_work_array(phba);
 264         if (vports != NULL)
 265                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 266                         shost = lpfc_shost_from_vport(vports[i]);
 267                         shost_for_each_device(sdev, shost) {
 268                                 new_queue_depth =
 269                                         sdev->queue_depth * num_rsrc_err /
 270                                         (num_rsrc_err + num_cmd_success);
 271                                 if (!new_queue_depth)
 272                                         new_queue_depth = sdev->queue_depth - 1;
 273                                 else
 274                                         new_queue_depth = sdev->queue_depth -
 275                                                                 new_queue_depth;
 276                                 scsi_change_queue_depth(sdev, new_queue_depth);
 277                         }
 278                 }
 279         lpfc_destroy_vport_work_array(phba, vports);
 280         atomic_set(&phba->num_rsrc_err, 0);
 281         atomic_set(&phba->num_cmd_success, 0);
 282 }
 283
 284 /**
 285  * lpfc_scsi_dev_block - set all scsi hosts to block state
 286  * @phba: Pointer to HBA context object.
 287  *
 288  * This function walks vport list and set each SCSI host to block state
 289  * by invoking fc_remote_port_delete() routine. This function is invoked
 290  * with EEH when device's PCI slot has been permanently disabled.
 291  **/
 292 void
 293 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 294 {
 295         struct lpfc_vport **vports;
 296         struct Scsi_Host  *shost;
 297         struct scsi_device *sdev;
 298         struct fc_rport *rport;
 299         int i;
 300
 301         vports = lpfc_create_vport_work_array(phba);
 302         if (vports != NULL)
 303                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 304                         shost = lpfc_shost_from_vport(vports[i]);
 305                         shost_for_each_device(sdev, shost) {
 306                                 rport = starget_to_rport(scsi_target(sdev));
 307                                 fc_remote_port_delete(rport);
 308                         }
 309                 }
 310         lpfc_destroy_vport_work_array(phba, vports);
 311 }
 312
 313 /**
 314  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 315  * @vport: The virtual port for which this call being executed.
 316  * @num_to_allocate: The requested number of buffers to allocate.
 317  *
 318  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 319  * the scsi buffer contains all the necessary information needed to initiate
 320  * a SCSI I/O. The non-DMAable buffer region contains information to build
 321  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 322  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 323  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 324  *
 325  * Return codes:
 326  *   int - number of scsi buffers that were allocated.
 327  *   0 = failure, less than num_to_alloc is a partial failure.
 328  **/
 329 static int
 330 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 331 {
 332         struct lpfc_hba *phba = vport->phba;
 333         struct lpfc_io_buf *psb;
 334         struct ulp_bde64 *bpl;
 335         IOCB_t *iocb;
 336         dma_addr_t pdma_phys_fcp_cmd;
 337         dma_addr_t pdma_phys_fcp_rsp;
 338         dma_addr_t pdma_phys_sgl;
 339         uint16_t iotag;
 340         int bcnt, bpl_size;
 341
 342         bpl_size = phba->cfg_sg_dma_buf_size -
 343                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 344
 345         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 346                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 347                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 348                          (int)sizeof(struct fcp_cmnd),
 349                          (int)sizeof(struct fcp_rsp), bpl_size);
 350
 351         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 352                 psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL);
 353                 if (!psb)
 354                         break;
 355
 356                 /*
 357                  * Get memory from the pci pool to map the virt space to pci
 358                  * bus space for an I/O.  The DMA buffer includes space for the
 359                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 360                  * necessary to support the sg_tablesize.
 361                  */
 362                 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
 363                                         GFP_KERNEL, &psb->dma_handle);
 364                 if (!psb->data) {
 365                         kfree(psb);
 366                         break;
 367                 }
 368
 369
 370                 /* Allocate iotag for psb->cur_iocbq. */
 371                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 372                 if (iotag == 0) {
 373                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 374                                       psb->data, psb->dma_handle);
 375                         kfree(psb);
 376                         break;
 377                 }
 378                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 379
 380                 psb->fcp_cmnd = psb->data;
 381                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 382                 psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) +
 383                         sizeof(struct fcp_rsp);
 384
 385                 /* Initialize local short-hand pointers. */
 386                 bpl = (struct ulp_bde64 *)psb->dma_sgl;
 387                 pdma_phys_fcp_cmd = psb->dma_handle;
 388                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 389                 pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 390                         sizeof(struct fcp_rsp);
 391
 392                 /*
 393                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 394                  * are sg list bdes.  Initialize the first two and leave the
 395                  * rest for queuecommand.
 396                  */
 397                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 398                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 399                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 400                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 401                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 402
 403                 /* Setup the physical region for the FCP RSP */
 404                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 405                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 406                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 407                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 408                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 409
 410                 /*
 411                  * Since the IOCB for the FCP I/O is built into this
 412                  * lpfc_scsi_buf, initialize it with all known data now.
 413                  */
 414                 iocb = &psb->cur_iocbq.iocb;
 415                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 416                 if ((phba->sli_rev == 3) &&
 417                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 418                         /* fill in immediate fcp command BDE */
 419                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 420                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 421                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 422                                         unsli3.fcp_ext.icd);
 423                         iocb->un.fcpi64.bdl.addrHigh = 0;
 424                         iocb->ulpBdeCount = 0;
 425                         iocb->ulpLe = 0;
 426                         /* fill in response BDE */
 427                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 428                                                         BUFF_TYPE_BDE_64;
 429                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 430                                 sizeof(struct fcp_rsp);
 431                         iocb->unsli3.fcp_ext.rbde.addrLow =
 432                                 putPaddrLow(pdma_phys_fcp_rsp);
 433                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 434                                 putPaddrHigh(pdma_phys_fcp_rsp);
 435                 } else {
 436                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 437                         iocb->un.fcpi64.bdl.bdeSize =
 438                                         (2 * sizeof(struct ulp_bde64));
 439                         iocb->un.fcpi64.bdl.addrLow =
 440                                         putPaddrLow(pdma_phys_sgl);
 441                         iocb->un.fcpi64.bdl.addrHigh =
 442                                         putPaddrHigh(pdma_phys_sgl);
 443                         iocb->ulpBdeCount = 1;
 444                         iocb->ulpLe = 1;
 445                 }
 446                 iocb->ulpClass = CLASS3;
 447                 psb->status = IOSTAT_SUCCESS;
 448                 /* Put it back into the SCSI buffer list */
 449                 psb->cur_iocbq.context1  = psb;
 450                 spin_lock_init(&psb->buf_lock);
 451                 lpfc_release_scsi_buf_s3(phba, psb);
 452
 453         }
 454
 455         return bcnt;
 456 }
 457
 458 /**
 459  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 460  * @vport: pointer to lpfc vport data structure.
 461  *
 462  * This routine is invoked by the vport cleanup for deletions and the cleanup
 463  * for an ndlp on removal.
 464  **/
 465 void
 466 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 467 {
 468         struct lpfc_hba *phba = vport->phba;
 469         struct lpfc_io_buf *psb, *next_psb;
 470         struct lpfc_sli4_hdw_queue *qp;
 471         unsigned long iflag = 0;
 472         int idx;
 473
 474         if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 475                 return;
 476
 477         spin_lock_irqsave(&phba->hbalock, iflag);
 478         for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
 479                 qp = &phba->sli4_hba.hdwq[idx];
 480
 481                 spin_lock(&qp->abts_io_buf_list_lock);
 482                 list_for_each_entry_safe(psb, next_psb,
 483                                          &qp->lpfc_abts_io_buf_list, list) {
 484                         if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME)
 485                                 continue;
 486
 487                         if (psb->rdata && psb->rdata->pnode &&
 488                             psb->rdata->pnode->vport == vport)
 489                                 psb->rdata = NULL;
 490                 }
 491                 spin_unlock(&qp->abts_io_buf_list_lock);
 492         }
 493         spin_unlock_irqrestore(&phba->hbalock, iflag);
 494 }
 495
 496 /**
 497  * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort
 498  * @phba: pointer to lpfc hba data structure.
 499  * @axri: pointer to the fcp xri abort wcqe structure.
 500  *
 501  * This routine is invoked by the worker thread to process a SLI4 fast-path
 502  * FCP or NVME aborted xri.
 503  **/
 504 void
 505 lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba,
 506                          struct sli4_wcqe_xri_aborted *axri, int idx)
 507 {
 508         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 509         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 510         struct lpfc_io_buf *psb, *next_psb;
 511         struct lpfc_sli4_hdw_queue *qp;
 512         unsigned long iflag = 0;
 513         struct lpfc_iocbq *iocbq;
 514         int i;
 515         struct lpfc_nodelist *ndlp;
 516         int rrq_empty = 0;
 517         struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
 518
 519         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 520                 return;
 521
 522         qp = &phba->sli4_hba.hdwq[idx];
 523         spin_lock_irqsave(&phba->hbalock, iflag);
 524         spin_lock(&qp->abts_io_buf_list_lock);
 525         list_for_each_entry_safe(psb, next_psb,
 526                 &qp->lpfc_abts_io_buf_list, list) {
 527                 if (psb->cur_iocbq.sli4_xritag == xri) {
 528                         list_del_init(&psb->list);
 529                         psb->flags &= ~LPFC_SBUF_XBUSY;
 530                         psb->status = IOSTAT_SUCCESS;
 531                         if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME) {
 532                                 qp->abts_nvme_io_bufs--;
 533                                 spin_unlock(&qp->abts_io_buf_list_lock);
 534                                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 535                                 lpfc_sli4_nvme_xri_aborted(phba, axri, psb);
 536                                 return;
 537                         }
 538                         qp->abts_scsi_io_bufs--;
 539                         spin_unlock(&qp->abts_io_buf_list_lock);
 540
 541                         if (psb->rdata && psb->rdata->pnode)
 542                                 ndlp = psb->rdata->pnode;
 543                         else
 544                                 ndlp = NULL;
 545
 546                         rrq_empty = list_empty(&phba->active_rrq_list);
 547                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 548                         if (ndlp) {
 549                                 lpfc_set_rrq_active(phba, ndlp,
 550                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 551                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 552                         }
 553                         lpfc_release_scsi_buf_s4(phba, psb);
 554                         if (rrq_empty)
 555                                 lpfc_worker_wake_up(phba);
 556                         return;
 557                 }
 558         }
 559         spin_unlock(&qp->abts_io_buf_list_lock);
 560         for (i = 1; i <= phba->sli.last_iotag; i++) {
 561                 iocbq = phba->sli.iocbq_lookup[i];
 562
 563                 if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
 564                     (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 565                         continue;
 566                 if (iocbq->sli4_xritag != xri)
 567                         continue;
 568                 psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq);
 569                 psb->flags &= ~LPFC_SBUF_XBUSY;
 570                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 571                 if (!list_empty(&pring->txq))
 572                         lpfc_worker_wake_up(phba);
 573                 return;
 574
 575         }
 576         spin_unlock_irqrestore(&phba->hbalock, iflag);
 577 }
 578
 579 /**
 580  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 581  * @phba: The HBA for which this call is being executed.
 582  *
 583  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 584  * and returns to caller.
 585  *
 586  * Return codes:
 587  *   NULL - Error
 588  *   Pointer to lpfc_scsi_buf - Success
 589  **/
 590 static struct lpfc_io_buf *
 591 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 592                      struct scsi_cmnd *cmnd)
 593 {
 594         struct lpfc_io_buf *lpfc_cmd = NULL;
 595         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
 596         unsigned long iflag = 0;
 597
 598         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
 599         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf,
 600                          list);
 601         if (!lpfc_cmd) {
 602                 spin_lock(&phba->scsi_buf_list_put_lock);
 603                 list_splice(&phba->lpfc_scsi_buf_list_put,
 604                             &phba->lpfc_scsi_buf_list_get);
 605                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
 606                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
 607                                  struct lpfc_io_buf, list);
 608                 spin_unlock(&phba->scsi_buf_list_put_lock);
 609         }
 610         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
 611
 612         if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
 613                 atomic_inc(&ndlp->cmd_pending);
 614                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
 615         }
 616         return  lpfc_cmd;
 617 }
 618 /**
 619  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA
 620  * @phba: The HBA for which this call is being executed.
 621  *
 622  * This routine removes a scsi buffer from head of @hdwq io_buf_list
 623  * and returns to caller.
 624  *
 625  * Return codes:
 626  *   NULL - Error
 627  *   Pointer to lpfc_scsi_buf - Success
 628  **/
 629 static struct lpfc_io_buf *
 630 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 631                      struct scsi_cmnd *cmnd)
 632 {
 633         struct lpfc_io_buf *lpfc_cmd;
 634         struct lpfc_sli4_hdw_queue *qp;
 635         struct sli4_sge *sgl;
 636         IOCB_t *iocb;
 637         dma_addr_t pdma_phys_fcp_rsp;
 638         dma_addr_t pdma_phys_fcp_cmd;
 639         uint32_t cpu, idx;
 640         int tag;
 641         struct fcp_cmd_rsp_buf *tmp = NULL;
 642
 643         cpu = raw_smp_processor_id();
 644         if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
 645                 tag = blk_mq_unique_tag(cmnd->request);
 646                 idx = blk_mq_unique_tag_to_hwq(tag);
 647         } else {
 648                 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
 649         }
 650
 651         lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx,
 652                                    !phba->cfg_xri_rebalancing);
 653         if (!lpfc_cmd) {
 654                 qp = &phba->sli4_hba.hdwq[idx];
 655                 qp->empty_io_bufs++;
 656                 return NULL;
 657         }
 658
 659         /* Setup key fields in buffer that may have been changed
 660          * if other protocols used this buffer.
 661          */
 662         lpfc_cmd->cur_iocbq.iocb_flag = LPFC_IO_FCP;
 663         lpfc_cmd->prot_seg_cnt = 0;
 664         lpfc_cmd->seg_cnt = 0;
 665         lpfc_cmd->timeout = 0;
 666         lpfc_cmd->flags = 0;
 667         lpfc_cmd->start_time = jiffies;
 668         lpfc_cmd->waitq = NULL;
 669         lpfc_cmd->cpu = cpu;
 670 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 671         lpfc_cmd->prot_data_type = 0;
 672 #endif
 673         tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
 674         if (!tmp)
 675                 return NULL;
 676
 677         lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
 678         lpfc_cmd->fcp_rsp = tmp->fcp_rsp;
 679
 680         /*
 681          * The first two SGEs are the FCP_CMD and FCP_RSP.
 682          * The balance are sg list bdes. Initialize the
 683          * first two and leave the rest for queuecommand.
 684          */
 685         sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
 686         pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle;
 687         sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 688         sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 689         sgl->word2 = le32_to_cpu(sgl->word2);
 690         bf_set(lpfc_sli4_sge_last, sgl, 0);
 691         sgl->word2 = cpu_to_le32(sgl->word2);
 692         sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 693         sgl++;
 694
 695         /* Setup the physical region for the FCP RSP */
 696         pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 697         sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 698         sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 699         sgl->word2 = le32_to_cpu(sgl->word2);
 700         bf_set(lpfc_sli4_sge_last, sgl, 1);
 701         sgl->word2 = cpu_to_le32(sgl->word2);
 702         sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 703
 704         /*
 705          * Since the IOCB for the FCP I/O is built into this
 706          * lpfc_io_buf, initialize it with all known data now.
 707          */
 708         iocb = &lpfc_cmd->cur_iocbq.iocb;
 709         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 710         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 711         /* setting the BLP size to 2 * sizeof BDE may not be correct.
 712          * We are setting the bpl to point to out sgl. An sgl's
 713          * entries are 16 bytes, a bpl entries are 12 bytes.
 714          */
 715         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 716         iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 717         iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 718         iocb->ulpBdeCount = 1;
 719         iocb->ulpLe = 1;
 720         iocb->ulpClass = CLASS3;
 721
 722         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
 723                 atomic_inc(&ndlp->cmd_pending);
 724                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
 725         }
 726         return  lpfc_cmd;
 727 }
 728 /**
 729  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 730  * @phba: The HBA for which this call is being executed.
 731  *
 732  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 733  * and returns to caller.
 734  *
 735  * Return codes:
 736  *   NULL - Error
 737  *   Pointer to lpfc_scsi_buf - Success
 738  **/
 739 static struct lpfc_io_buf*
 740 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
 741                   struct scsi_cmnd *cmnd)
 742 {
 743         return  phba->lpfc_get_scsi_buf(phba, ndlp, cmnd);
 744 }
 745
 746 /**
 747  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
 748  * @phba: The Hba for which this call is being executed.
 749  * @psb: The scsi buffer which is being released.
 750  *
 751  * This routine releases @psb scsi buffer by adding it to tail of @phba
 752  * lpfc_scsi_buf_list list.
 753  **/
 754 static void
 755 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 756 {
 757         unsigned long iflag = 0;
 758
 759         psb->seg_cnt = 0;
 760         psb->prot_seg_cnt = 0;
 761
 762         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
 763         psb->pCmd = NULL;
 764         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
 765         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
 766         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
 767 }
 768
 769 /**
 770  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
 771  * @phba: The Hba for which this call is being executed.
 772  * @psb: The scsi buffer which is being released.
 773  *
 774  * This routine releases @psb scsi buffer by adding it to tail of @hdwq
 775  * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer
 776  * and cannot be reused for at least RA_TOV amount of time if it was
 777  * aborted.
 778  **/
 779 static void
 780 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 781 {
 782         struct lpfc_sli4_hdw_queue *qp;
 783         unsigned long iflag = 0;
 784
 785         psb->seg_cnt = 0;
 786         psb->prot_seg_cnt = 0;
 787
 788         qp = psb->hdwq;
 789         if (psb->flags & LPFC_SBUF_XBUSY) {
 790                 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
 791                 psb->pCmd = NULL;
 792                 list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list);
 793                 qp->abts_scsi_io_bufs++;
 794                 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
 795         } else {
 796                 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp);
 797         }
 798 }
 799
 800 /**
 801  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 802  * @phba: The Hba for which this call is being executed.
 803  * @psb: The scsi buffer which is being released.
 804  *
 805  * This routine releases @psb scsi buffer by adding it to tail of @phba
 806  * lpfc_scsi_buf_list list.
 807  **/
 808 static void
 809 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 810 {
 811         if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
 812                 atomic_dec(&psb->ndlp->cmd_pending);
 813
 814         psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
 815         phba->lpfc_release_scsi_buf(phba, psb);
 816 }
 817
 818 /**
 819  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
 820  * @phba: The Hba for which this call is being executed.
 821  * @lpfc_cmd: The scsi buffer which is going to be mapped.
 822  *
 823  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
 824  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
 825  * through sg elements and format the bde. This routine also initializes all
 826  * IOCB fields which are dependent on scsi command request buffer.
 827  *
 828  * Return codes:
 829  *   1 - Error
 830  *   0 - Success
 831  **/
 832 static int
 833 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 834 {
 835         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
 836         struct scatterlist *sgel = NULL;
 837         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
 838         struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
 839         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
 840         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
 841         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
 842         dma_addr_t physaddr;
 843         uint32_t num_bde = 0;
 844         int nseg, datadir = scsi_cmnd->sc_data_direction;
 845
 846         /*
 847          * There are three possibilities here - use scatter-gather segment, use
 848          * the single mapping, or neither.  Start the lpfc command prep by
 849          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
 850          * data bde entry.
 851          */
 852         bpl += 2;
 853         if (scsi_sg_count(scsi_cmnd)) {
 854                 /*
 855                  * The driver stores the segment count returned from pci_map_sg
 856                  * because this a count of dma-mappings used to map the use_sg
 857                  * pages.  They are not guaranteed to be the same for those
 858                  * architectures that implement an IOMMU.
 859                  */
 860
 861                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
 862                                   scsi_sg_count(scsi_cmnd), datadir);
 863                 if (unlikely(!nseg))
 864                         return 1;
 865
 866                 lpfc_cmd->seg_cnt = nseg;
 867                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
 868                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 869                                 "9064 BLKGRD: %s: Too many sg segments from "
 870                                "dma_map_sg.  Config %d, seg_cnt %d\n",
 871                                __func__, phba->cfg_sg_seg_cnt,
 872                                lpfc_cmd->seg_cnt);
 873                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
 874                         lpfc_cmd->seg_cnt = 0;
 875                         scsi_dma_unmap(scsi_cmnd);
 876                         return 2;
 877                 }
 878
 879                 /*
 880                  * The driver established a maximum scatter-gather segment count
 881                  * during probe that limits the number of sg elements in any
 882                  * single scsi command.  Just run through the seg_cnt and format
 883                  * the bde's.
 884                  * When using SLI-3 the driver will try to fit all the BDEs into
 885                  * the IOCB. If it can't then the BDEs get added to a BPL as it
 886                  * does for SLI-2 mode.
 887                  */
 888                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
 889                         physaddr = sg_dma_address(sgel);
 890                         if (phba->sli_rev == 3 &&
 891                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
 892                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
 893                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
 894                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 895                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
 896                                 data_bde->addrLow = putPaddrLow(physaddr);
 897                                 data_bde->addrHigh = putPaddrHigh(physaddr);
 898                                 data_bde++;
 899                         } else {
 900                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 901                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
 902                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 903                                 bpl->addrLow =
 904                                         le32_to_cpu(putPaddrLow(physaddr));
 905                                 bpl->addrHigh =
 906                                         le32_to_cpu(putPaddrHigh(physaddr));
 907                                 bpl++;
 908                         }
 909                 }
 910         }
 911
 912         /*
 913          * Finish initializing those IOCB fields that are dependent on the
 914          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
 915          * explicitly reinitialized and for SLI-3 the extended bde count is
 916          * explicitly reinitialized since all iocb memory resources are reused.
 917          */
 918         if (phba->sli_rev == 3 &&
 919             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
 920             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
 921                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
 922                         /*
 923                          * The extended IOCB format can only fit 3 BDE or a BPL.
 924                          * This I/O has more than 3 BDE so the 1st data bde will
 925                          * be a BPL that is filled in here.
 926                          */
 927                         physaddr = lpfc_cmd->dma_handle;
 928                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
 929                         data_bde->tus.f.bdeSize = (num_bde *
 930                                                    sizeof(struct ulp_bde64));
 931                         physaddr += (sizeof(struct fcp_cmnd) +
 932                                      sizeof(struct fcp_rsp) +
 933                                      (2 * sizeof(struct ulp_bde64)));
 934                         data_bde->addrHigh = putPaddrHigh(physaddr);
 935                         data_bde->addrLow = putPaddrLow(physaddr);
 936                         /* ebde count includes the response bde and data bpl */
 937                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
 938                 } else {
 939                         /* ebde count includes the response bde and data bdes */
 940                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 941                 }
 942         } else {
 943                 iocb_cmd->un.fcpi64.bdl.bdeSize =
 944                         ((num_bde + 2) * sizeof(struct ulp_bde64));
 945                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
 946         }
 947         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 948
 949         /*
 950          * Due to difference in data length between DIF/non-DIF paths,
 951          * we need to set word 4 of IOCB here
 952          */
 953         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
 954         return 0;
 955 }
 956
 957 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 958
 959 /* Return BG_ERR_INIT if error injection is detected by Initiator */
 960 #define BG_ERR_INIT     0x1
 961 /* Return BG_ERR_TGT if error injection is detected by Target */
 962 #define BG_ERR_TGT      0x2
 963 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
 964 #define BG_ERR_SWAP     0x10
 965 /**
 966  * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
 967  * error injection
 968  **/
 969 #define BG_ERR_CHECK    0x20
 970
 971 /**
 972  * lpfc_bg_err_inject - Determine if we should inject an error
 973  * @phba: The Hba for which this call is being executed.
 974  * @sc: The SCSI command to examine
 975  * @reftag: (out) BlockGuard reference tag for transmitted data
 976  * @apptag: (out) BlockGuard application tag for transmitted data
 977  * @new_guard (in) Value to replace CRC with if needed
 978  *
 979  * Returns BG_ERR_* bit mask or 0 if request ignored
 980  **/
 981 static int
 982 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 983                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
 984 {
 985         struct scatterlist *sgpe; /* s/g prot entry */
 986         struct lpfc_io_buf *lpfc_cmd = NULL;
 987         struct scsi_dif_tuple *src = NULL;
 988         struct lpfc_nodelist *ndlp;
 989         struct lpfc_rport_data *rdata;
 990         uint32_t op = scsi_get_prot_op(sc);
 991         uint32_t blksize;
 992         uint32_t numblks;
 993         sector_t lba;
 994         int rc = 0;
 995         int blockoff = 0;
 996
 997         if (op == SCSI_PROT_NORMAL)
 998                 return 0;
 999
1000         sgpe = scsi_prot_sglist(sc);
1001         lba = scsi_get_lba(sc);
1002
1003         /* First check if we need to match the LBA */
1004         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1005                 blksize = lpfc_cmd_blksize(sc);
1006                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1007
1008                 /* Make sure we have the right LBA if one is specified */
1009                 if ((phba->lpfc_injerr_lba < lba) ||
1010                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1011                         return 0;
1012                 if (sgpe) {
1013                         blockoff = phba->lpfc_injerr_lba - lba;
1014                         numblks = sg_dma_len(sgpe) /
1015                                 sizeof(struct scsi_dif_tuple);
1016                         if (numblks < blockoff)
1017                                 blockoff = numblks;
1018                 }
1019         }
1020
1021         /* Next check if we need to match the remote NPortID or WWPN */
1022         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1023         if (rdata && rdata->pnode) {
1024                 ndlp = rdata->pnode;
1025
1026                 /* Make sure we have the right NPortID if one is specified */
1027                 if (phba->lpfc_injerr_nportid  &&
1028                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1029                         return 0;
1030
1031                 /*
1032                  * Make sure we have the right WWPN if one is specified.
1033                  * wwn[0] should be a non-zero NAA in a good WWPN.
1034                  */
1035                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1036                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1037                                 sizeof(struct lpfc_name)) != 0))
1038                         return 0;
1039         }
1040
1041         /* Setup a ptr to the protection data if the SCSI host provides it */
1042         if (sgpe) {
1043                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1044                 src += blockoff;
1045                 lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble;
1046         }
1047
1048         /* Should we change the Reference Tag */
1049         if (reftag) {
1050                 if (phba->lpfc_injerr_wref_cnt) {
1051                         switch (op) {
1052                         case SCSI_PROT_WRITE_PASS:
1053                                 if (src) {
1054                                         /*
1055                                          * For WRITE_PASS, force the error
1056                                          * to be sent on the wire. It should
1057                                          * be detected by the Target.
1058                                          * If blockoff != 0 error will be
1059                                          * inserted in middle of the IO.
1060                                          */
1061
1062                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1063                                         "9076 BLKGRD: Injecting reftag error: "
1064                                         "write lba x%lx + x%x oldrefTag x%x\n",
1065                                         (unsigned long)lba, blockoff,
1066                                         be32_to_cpu(src->ref_tag));
1067
1068                                         /*
1069                                          * Save the old ref_tag so we can
1070                                          * restore it on completion.
1071                                          */
1072                                         if (lpfc_cmd) {
1073                                                 lpfc_cmd->prot_data_type =
1074                                                         LPFC_INJERR_REFTAG;
1075                                                 lpfc_cmd->prot_data_segment =
1076                                                         src;
1077                                                 lpfc_cmd->prot_data =
1078                                                         src->ref_tag;
1079                                         }
1080                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1081                                         phba->lpfc_injerr_wref_cnt--;
1082                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1083                                                 phba->lpfc_injerr_nportid = 0;
1084                                                 phba->lpfc_injerr_lba =
1085                                                         LPFC_INJERR_LBA_OFF;
1086                                                 memset(&phba->lpfc_injerr_wwpn,
1087                                                   0, sizeof(struct lpfc_name));
1088                                         }
1089                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1090
1091                                         break;
1092                                 }
1093                                 /* fall through */
1094                         case SCSI_PROT_WRITE_INSERT:
1095                                 /*
1096                                  * For WRITE_INSERT, force the error
1097                                  * to be sent on the wire. It should be
1098                                  * detected by the Target.
1099                                  */
1100                                 /* DEADBEEF will be the reftag on the wire */
1101                                 *reftag = 0xDEADBEEF;
1102                                 phba->lpfc_injerr_wref_cnt--;
1103                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1104                                         phba->lpfc_injerr_nportid = 0;
1105                                         phba->lpfc_injerr_lba =
1106                                         LPFC_INJERR_LBA_OFF;
1107                                         memset(&phba->lpfc_injerr_wwpn,
1108                                                 0, sizeof(struct lpfc_name));
1109                                 }
1110                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1111
1112                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1113                                         "9078 BLKGRD: Injecting reftag error: "
1114                                         "write lba x%lx\n", (unsigned long)lba);
1115                                 break;
1116                         case SCSI_PROT_WRITE_STRIP:
1117                                 /*
1118                                  * For WRITE_STRIP and WRITE_PASS,
1119                                  * force the error on data
1120                                  * being copied from SLI-Host to SLI-Port.
1121                                  */
1122                                 *reftag = 0xDEADBEEF;
1123                                 phba->lpfc_injerr_wref_cnt--;
1124                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1125                                         phba->lpfc_injerr_nportid = 0;
1126                                         phba->lpfc_injerr_lba =
1127                                                 LPFC_INJERR_LBA_OFF;
1128                                         memset(&phba->lpfc_injerr_wwpn,
1129                                                 0, sizeof(struct lpfc_name));
1130                                 }
1131                                 rc = BG_ERR_INIT;
1132
1133                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1134                                         "9077 BLKGRD: Injecting reftag error: "
1135                                         "write lba x%lx\n", (unsigned long)lba);
1136                                 break;
1137                         }
1138                 }
1139                 if (phba->lpfc_injerr_rref_cnt) {
1140                         switch (op) {
1141                         case SCSI_PROT_READ_INSERT:
1142                         case SCSI_PROT_READ_STRIP:
1143                         case SCSI_PROT_READ_PASS:
1144                                 /*
1145                                  * For READ_STRIP and READ_PASS, force the
1146                                  * error on data being read off the wire. It
1147                                  * should force an IO error to the driver.
1148                                  */
1149                                 *reftag = 0xDEADBEEF;
1150                                 phba->lpfc_injerr_rref_cnt--;
1151                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1152                                         phba->lpfc_injerr_nportid = 0;
1153                                         phba->lpfc_injerr_lba =
1154                                                 LPFC_INJERR_LBA_OFF;
1155                                         memset(&phba->lpfc_injerr_wwpn,
1156                                                 0, sizeof(struct lpfc_name));
1157                                 }
1158                                 rc = BG_ERR_INIT;
1159
1160                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1161                                         "9079 BLKGRD: Injecting reftag error: "
1162                                         "read lba x%lx\n", (unsigned long)lba);
1163                                 break;
1164                         }
1165                 }
1166         }
1167
1168         /* Should we change the Application Tag */
1169         if (apptag) {
1170                 if (phba->lpfc_injerr_wapp_cnt) {
1171                         switch (op) {
1172                         case SCSI_PROT_WRITE_PASS:
1173                                 if (src) {
1174                                         /*
1175                                          * For WRITE_PASS, force the error
1176                                          * to be sent on the wire. It should
1177                                          * be detected by the Target.
1178                                          * If blockoff != 0 error will be
1179                                          * inserted in middle of the IO.
1180                                          */
1181
1182                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1183                                         "9080 BLKGRD: Injecting apptag error: "
1184                                         "write lba x%lx + x%x oldappTag x%x\n",
1185                                         (unsigned long)lba, blockoff,
1186                                         be16_to_cpu(src->app_tag));
1187
1188                                         /*
1189                                          * Save the old app_tag so we can
1190                                          * restore it on completion.
1191                                          */
1192                                         if (lpfc_cmd) {
1193                                                 lpfc_cmd->prot_data_type =
1194                                                         LPFC_INJERR_APPTAG;
1195                                                 lpfc_cmd->prot_data_segment =
1196                                                         src;
1197                                                 lpfc_cmd->prot_data =
1198                                                         src->app_tag;
1199                                         }
1200                                         src->app_tag = cpu_to_be16(0xDEAD);
1201                                         phba->lpfc_injerr_wapp_cnt--;
1202                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1203                                                 phba->lpfc_injerr_nportid = 0;
1204                                                 phba->lpfc_injerr_lba =
1205                                                         LPFC_INJERR_LBA_OFF;
1206                                                 memset(&phba->lpfc_injerr_wwpn,
1207                                                   0, sizeof(struct lpfc_name));
1208                                         }
1209                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1210                                         break;
1211                                 }
1212                                 /* fall through */
1213                         case SCSI_PROT_WRITE_INSERT:
1214                                 /*
1215                                  * For WRITE_INSERT, force the
1216                                  * error to be sent on the wire. It should be
1217                                  * detected by the Target.
1218                                  */
1219                                 /* DEAD will be the apptag on the wire */
1220                                 *apptag = 0xDEAD;
1221                                 phba->lpfc_injerr_wapp_cnt--;
1222                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1223                                         phba->lpfc_injerr_nportid = 0;
1224                                         phba->lpfc_injerr_lba =
1225                                                 LPFC_INJERR_LBA_OFF;
1226                                         memset(&phba->lpfc_injerr_wwpn,
1227                                                 0, sizeof(struct lpfc_name));
1228                                 }
1229                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1230
1231                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1232                                         "0813 BLKGRD: Injecting apptag error: "
1233                                         "write lba x%lx\n", (unsigned long)lba);
1234                                 break;
1235                         case SCSI_PROT_WRITE_STRIP:
1236                                 /*
1237                                  * For WRITE_STRIP and WRITE_PASS,
1238                                  * force the error on data
1239                                  * being copied from SLI-Host to SLI-Port.
1240                                  */
1241                                 *apptag = 0xDEAD;
1242                                 phba->lpfc_injerr_wapp_cnt--;
1243                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1244                                         phba->lpfc_injerr_nportid = 0;
1245                                         phba->lpfc_injerr_lba =
1246                                                 LPFC_INJERR_LBA_OFF;
1247                                         memset(&phba->lpfc_injerr_wwpn,
1248                                                 0, sizeof(struct lpfc_name));
1249                                 }
1250                                 rc = BG_ERR_INIT;
1251
1252                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1253                                         "0812 BLKGRD: Injecting apptag error: "
1254                                         "write lba x%lx\n", (unsigned long)lba);
1255                                 break;
1256                         }
1257                 }
1258                 if (phba->lpfc_injerr_rapp_cnt) {
1259                         switch (op) {
1260                         case SCSI_PROT_READ_INSERT:
1261                         case SCSI_PROT_READ_STRIP:
1262                         case SCSI_PROT_READ_PASS:
1263                                 /*
1264                                  * For READ_STRIP and READ_PASS, force the
1265                                  * error on data being read off the wire. It
1266                                  * should force an IO error to the driver.
1267                                  */
1268                                 *apptag = 0xDEAD;
1269                                 phba->lpfc_injerr_rapp_cnt--;
1270                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1271                                         phba->lpfc_injerr_nportid = 0;
1272                                         phba->lpfc_injerr_lba =
1273                                                 LPFC_INJERR_LBA_OFF;
1274                                         memset(&phba->lpfc_injerr_wwpn,
1275                                                 0, sizeof(struct lpfc_name));
1276                                 }
1277                                 rc = BG_ERR_INIT;
1278
1279                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1280                                         "0814 BLKGRD: Injecting apptag error: "
1281                                         "read lba x%lx\n", (unsigned long)lba);
1282                                 break;
1283                         }
1284                 }
1285         }
1286
1287
1288         /* Should we change the Guard Tag */
1289         if (new_guard) {
1290                 if (phba->lpfc_injerr_wgrd_cnt) {
1291                         switch (op) {
1292                         case SCSI_PROT_WRITE_PASS:
1293                                 rc = BG_ERR_CHECK;
1294                                 /* fall through */
1295
1296                         case SCSI_PROT_WRITE_INSERT:
1297                                 /*
1298                                  * For WRITE_INSERT, force the
1299                                  * error to be sent on the wire. It should be
1300                                  * detected by the Target.
1301                                  */
1302                                 phba->lpfc_injerr_wgrd_cnt--;
1303                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1304                                         phba->lpfc_injerr_nportid = 0;
1305                                         phba->lpfc_injerr_lba =
1306                                                 LPFC_INJERR_LBA_OFF;
1307                                         memset(&phba->lpfc_injerr_wwpn,
1308                                                 0, sizeof(struct lpfc_name));
1309                                 }
1310
1311                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1312                                 /* Signals the caller to swap CRC->CSUM */
1313
1314                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1315                                         "0817 BLKGRD: Injecting guard error: "
1316                                         "write lba x%lx\n", (unsigned long)lba);
1317                                 break;
1318                         case SCSI_PROT_WRITE_STRIP:
1319                                 /*
1320                                  * For WRITE_STRIP and WRITE_PASS,
1321                                  * force the error on data
1322                                  * being copied from SLI-Host to SLI-Port.
1323                                  */
1324                                 phba->lpfc_injerr_wgrd_cnt--;
1325                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1326                                         phba->lpfc_injerr_nportid = 0;
1327                                         phba->lpfc_injerr_lba =
1328                                                 LPFC_INJERR_LBA_OFF;
1329                                         memset(&phba->lpfc_injerr_wwpn,
1330                                                 0, sizeof(struct lpfc_name));
1331                                 }
1332
1333                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1334                                 /* Signals the caller to swap CRC->CSUM */
1335
1336                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1337                                         "0816 BLKGRD: Injecting guard error: "
1338                                         "write lba x%lx\n", (unsigned long)lba);
1339                                 break;
1340                         }
1341                 }
1342                 if (phba->lpfc_injerr_rgrd_cnt) {
1343                         switch (op) {
1344                         case SCSI_PROT_READ_INSERT:
1345                         case SCSI_PROT_READ_STRIP:
1346                         case SCSI_PROT_READ_PASS:
1347                                 /*
1348                                  * For READ_STRIP and READ_PASS, force the
1349                                  * error on data being read off the wire. It
1350                                  * should force an IO error to the driver.
1351                                  */
1352                                 phba->lpfc_injerr_rgrd_cnt--;
1353                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1354                                         phba->lpfc_injerr_nportid = 0;
1355                                         phba->lpfc_injerr_lba =
1356                                                 LPFC_INJERR_LBA_OFF;
1357                                         memset(&phba->lpfc_injerr_wwpn,
1358                                                 0, sizeof(struct lpfc_name));
1359                                 }
1360
1361                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1362                                 /* Signals the caller to swap CRC->CSUM */
1363
1364                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1365                                         "0818 BLKGRD: Injecting guard error: "
1366                                         "read lba x%lx\n", (unsigned long)lba);
1367                         }
1368                 }
1369         }
1370
1371         return rc;
1372 }
1373 #endif
1374
1375 /**
1376  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1377  * the specified SCSI command.
1378  * @phba: The Hba for which this call is being executed.
1379  * @sc: The SCSI command to examine
1380  * @txopt: (out) BlockGuard operation for transmitted data
1381  * @rxopt: (out) BlockGuard operation for received data
1382  *
1383  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1384  *
1385  **/
1386 static int
1387 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1388                 uint8_t *txop, uint8_t *rxop)
1389 {
1390         uint8_t ret = 0;
1391
1392         if (lpfc_cmd_guard_csum(sc)) {
1393                 switch (scsi_get_prot_op(sc)) {
1394                 case SCSI_PROT_READ_INSERT:
1395                 case SCSI_PROT_WRITE_STRIP:
1396                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1397                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1398                         break;
1399
1400                 case SCSI_PROT_READ_STRIP:
1401                 case SCSI_PROT_WRITE_INSERT:
1402                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1403                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1404                         break;
1405
1406                 case SCSI_PROT_READ_PASS:
1407                 case SCSI_PROT_WRITE_PASS:
1408                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1409                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1410                         break;
1411
1412                 case SCSI_PROT_NORMAL:
1413                 default:
1414                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1415                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1416                                         scsi_get_prot_op(sc));
1417                         ret = 1;
1418                         break;
1419
1420                 }
1421         } else {
1422                 switch (scsi_get_prot_op(sc)) {
1423                 case SCSI_PROT_READ_STRIP:
1424                 case SCSI_PROT_WRITE_INSERT:
1425                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1426                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1427                         break;
1428
1429                 case SCSI_PROT_READ_PASS:
1430                 case SCSI_PROT_WRITE_PASS:
1431                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1432                         *txop = BG_OP_IN_CRC_OUT_CRC;
1433                         break;
1434
1435                 case SCSI_PROT_READ_INSERT:
1436                 case SCSI_PROT_WRITE_STRIP:
1437                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1438                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1439                         break;
1440
1441                 case SCSI_PROT_NORMAL:
1442                 default:
1443                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1444                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1445                                         scsi_get_prot_op(sc));
1446                         ret = 1;
1447                         break;
1448                 }
1449         }
1450
1451         return ret;
1452 }
1453
1454 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1455 /**
1456  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1457  * the specified SCSI command in order to force a guard tag error.
1458  * @phba: The Hba for which this call is being executed.
1459  * @sc: The SCSI command to examine
1460  * @txopt: (out) BlockGuard operation for transmitted data
1461  * @rxopt: (out) BlockGuard operation for received data
1462  *
1463  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1464  *
1465  **/
1466 static int
1467 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1468                 uint8_t *txop, uint8_t *rxop)
1469 {
1470         uint8_t ret = 0;
1471
1472         if (lpfc_cmd_guard_csum(sc)) {
1473                 switch (scsi_get_prot_op(sc)) {
1474                 case SCSI_PROT_READ_INSERT:
1475                 case SCSI_PROT_WRITE_STRIP:
1476                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1477                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1478                         break;
1479
1480                 case SCSI_PROT_READ_STRIP:
1481                 case SCSI_PROT_WRITE_INSERT:
1482                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1483                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1484                         break;
1485
1486                 case SCSI_PROT_READ_PASS:
1487                 case SCSI_PROT_WRITE_PASS:
1488                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1489                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1490                         break;
1491
1492                 case SCSI_PROT_NORMAL:
1493                 default:
1494                         break;
1495
1496                 }
1497         } else {
1498                 switch (scsi_get_prot_op(sc)) {
1499                 case SCSI_PROT_READ_STRIP:
1500                 case SCSI_PROT_WRITE_INSERT:
1501                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1502                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1503                         break;
1504
1505                 case SCSI_PROT_READ_PASS:
1506                 case SCSI_PROT_WRITE_PASS:
1507                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1508                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1509                         break;
1510
1511                 case SCSI_PROT_READ_INSERT:
1512                 case SCSI_PROT_WRITE_STRIP:
1513                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1514                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1515                         break;
1516
1517                 case SCSI_PROT_NORMAL:
1518                 default:
1519                         break;
1520                 }
1521         }
1522
1523         return ret;
1524 }
1525 #endif
1526
1527 /**
1528  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1529  * @phba: The Hba for which this call is being executed.
1530  * @sc: pointer to scsi command we're working on
1531  * @bpl: pointer to buffer list for protection groups
1532  * @datacnt: number of segments of data that have been dma mapped
1533  *
1534  * This function sets up BPL buffer list for protection groups of
1535  * type LPFC_PG_TYPE_NO_DIF
1536  *
1537  * This is usually used when the HBA is instructed to generate
1538  * DIFs and insert them into data stream (or strip DIF from
1539  * incoming data stream)
1540  *
1541  * The buffer list consists of just one protection group described
1542  * below:
1543  *                                +-------------------------+
1544  *   start of prot group  -->     |          PDE_5          |
1545  *                                +-------------------------+
1546  *                                |          PDE_6          |
1547  *                                +-------------------------+
1548  *                                |         Data BDE        |
1549  *                                +-------------------------+
1550  *                                |more Data BDE's ... (opt)|
1551  *                                +-------------------------+
1552  *
1553  *
1554  * Note: Data s/g buffers have been dma mapped
1555  *
1556  * Returns the number of BDEs added to the BPL.
1557  **/
1558 static int
1559 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1560                 struct ulp_bde64 *bpl, int datasegcnt)
1561 {
1562         struct scatterlist *sgde = NULL; /* s/g data entry */
1563         struct lpfc_pde5 *pde5 = NULL;
1564         struct lpfc_pde6 *pde6 = NULL;
1565         dma_addr_t physaddr;
1566         int i = 0, num_bde = 0, status;
1567         int datadir = sc->sc_data_direction;
1568 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1569         uint32_t rc;
1570 #endif
1571         uint32_t checking = 1;
1572         uint32_t reftag;
1573         uint8_t txop, rxop;
1574
1575         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1576         if (status)
1577                 goto out;
1578
1579         /* extract some info from the scsi command for pde*/
1580         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1581
1582 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1583         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1584         if (rc) {
1585                 if (rc & BG_ERR_SWAP)
1586                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1587                 if (rc & BG_ERR_CHECK)
1588                         checking = 0;
1589         }
1590 #endif
1591
1592         /* setup PDE5 with what we have */
1593         pde5 = (struct lpfc_pde5 *) bpl;
1594         memset(pde5, 0, sizeof(struct lpfc_pde5));
1595         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1596
1597         /* Endianness conversion if necessary for PDE5 */
1598         pde5->word0 = cpu_to_le32(pde5->word0);
1599         pde5->reftag = cpu_to_le32(reftag);
1600
1601         /* advance bpl and increment bde count */
1602         num_bde++;
1603         bpl++;
1604         pde6 = (struct lpfc_pde6 *) bpl;
1605
1606         /* setup PDE6 with the rest of the info */
1607         memset(pde6, 0, sizeof(struct lpfc_pde6));
1608         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1609         bf_set(pde6_optx, pde6, txop);
1610         bf_set(pde6_oprx, pde6, rxop);
1611
1612         /*
1613          * We only need to check the data on READs, for WRITEs
1614          * protection data is automatically generated, not checked.
1615          */
1616         if (datadir == DMA_FROM_DEVICE) {
1617                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1618                         bf_set(pde6_ce, pde6, checking);
1619                 else
1620                         bf_set(pde6_ce, pde6, 0);
1621
1622                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1623                         bf_set(pde6_re, pde6, checking);
1624                 else
1625                         bf_set(pde6_re, pde6, 0);
1626         }
1627         bf_set(pde6_ai, pde6, 1);
1628         bf_set(pde6_ae, pde6, 0);
1629         bf_set(pde6_apptagval, pde6, 0);
1630
1631         /* Endianness conversion if necessary for PDE6 */
1632         pde6->word0 = cpu_to_le32(pde6->word0);
1633         pde6->word1 = cpu_to_le32(pde6->word1);
1634         pde6->word2 = cpu_to_le32(pde6->word2);
1635
1636         /* advance bpl and increment bde count */
1637         num_bde++;
1638         bpl++;
1639
1640         /* assumption: caller has already run dma_map_sg on command data */
1641         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1642                 physaddr = sg_dma_address(sgde);
1643                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1644                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1645                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1646                 if (datadir == DMA_TO_DEVICE)
1647                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1648                 else
1649                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1650                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1651                 bpl++;
1652                 num_bde++;
1653         }
1654
1655 out:
1656         return num_bde;
1657 }
1658
1659 /**
1660  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1661  * @phba: The Hba for which this call is being executed.
1662  * @sc: pointer to scsi command we're working on
1663  * @bpl: pointer to buffer list for protection groups
1664  * @datacnt: number of segments of data that have been dma mapped
1665  * @protcnt: number of segment of protection data that have been dma mapped
1666  *
1667  * This function sets up BPL buffer list for protection groups of
1668  * type LPFC_PG_TYPE_DIF
1669  *
1670  * This is usually used when DIFs are in their own buffers,
1671  * separate from the data. The HBA can then by instructed
1672  * to place the DIFs in the outgoing stream.  For read operations,
1673  * The HBA could extract the DIFs and place it in DIF buffers.
1674  *
1675  * The buffer list for this type consists of one or more of the
1676  * protection groups described below:
1677  *                                    +-------------------------+
1678  *   start of first prot group  -->   |          PDE_5          |
1679  *                                    +-------------------------+
1680  *                                    |          PDE_6          |
1681  *                                    +-------------------------+
1682  *                                    |      PDE_7 (Prot BDE)   |
1683  *                                    +-------------------------+
1684  *                                    |        Data BDE         |
1685  *                                    +-------------------------+
1686  *                                    |more Data BDE's ... (opt)|
1687  *                                    +-------------------------+
1688  *   start of new  prot group  -->    |          PDE_5          |
1689  *                                    +-------------------------+
1690  *                                    |          ...            |
1691  *                                    +-------------------------+
1692  *
1693  * Note: It is assumed that both data and protection s/g buffers have been
1694  *       mapped for DMA
1695  *
1696  * Returns the number of BDEs added to the BPL.
1697  **/
1698 static int
1699 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1700                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
1701 {
1702         struct scatterlist *sgde = NULL; /* s/g data entry */
1703         struct scatterlist *sgpe = NULL; /* s/g prot entry */
1704         struct lpfc_pde5 *pde5 = NULL;
1705         struct lpfc_pde6 *pde6 = NULL;
1706         struct lpfc_pde7 *pde7 = NULL;
1707         dma_addr_t dataphysaddr, protphysaddr;
1708         unsigned short curr_data = 0, curr_prot = 0;
1709         unsigned int split_offset;
1710         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1711         unsigned int protgrp_blks, protgrp_bytes;
1712         unsigned int remainder, subtotal;
1713         int status;
1714         int datadir = sc->sc_data_direction;
1715         unsigned char pgdone = 0, alldone = 0;
1716         unsigned blksize;
1717 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1718         uint32_t rc;
1719 #endif
1720         uint32_t checking = 1;
1721         uint32_t reftag;
1722         uint8_t txop, rxop;
1723         int num_bde = 0;
1724
1725         sgpe = scsi_prot_sglist(sc);
1726         sgde = scsi_sglist(sc);
1727
1728         if (!sgpe || !sgde) {
1729                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1730                                 "9020 Invalid s/g entry: data=x%px prot=x%px\n",
1731                                 sgpe, sgde);
1732                 return 0;
1733         }
1734
1735         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1736         if (status)
1737                 goto out;
1738
1739         /* extract some info from the scsi command */
1740         blksize = lpfc_cmd_blksize(sc);
1741         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1742
1743 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1744         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1745         if (rc) {
1746                 if (rc & BG_ERR_SWAP)
1747                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1748                 if (rc & BG_ERR_CHECK)
1749                         checking = 0;
1750         }
1751 #endif
1752
1753         split_offset = 0;
1754         do {
1755                 /* Check to see if we ran out of space */
1756                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
1757                         return num_bde + 3;
1758
1759                 /* setup PDE5 with what we have */
1760                 pde5 = (struct lpfc_pde5 *) bpl;
1761                 memset(pde5, 0, sizeof(struct lpfc_pde5));
1762                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1763
1764                 /* Endianness conversion if necessary for PDE5 */
1765                 pde5->word0 = cpu_to_le32(pde5->word0);
1766                 pde5->reftag = cpu_to_le32(reftag);
1767
1768                 /* advance bpl and increment bde count */
1769                 num_bde++;
1770                 bpl++;
1771                 pde6 = (struct lpfc_pde6 *) bpl;
1772
1773                 /* setup PDE6 with the rest of the info */
1774                 memset(pde6, 0, sizeof(struct lpfc_pde6));
1775                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1776                 bf_set(pde6_optx, pde6, txop);
1777                 bf_set(pde6_oprx, pde6, rxop);
1778
1779                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1780                         bf_set(pde6_ce, pde6, checking);
1781                 else
1782                         bf_set(pde6_ce, pde6, 0);
1783
1784                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1785                         bf_set(pde6_re, pde6, checking);
1786                 else
1787                         bf_set(pde6_re, pde6, 0);
1788
1789                 bf_set(pde6_ai, pde6, 1);
1790                 bf_set(pde6_ae, pde6, 0);
1791                 bf_set(pde6_apptagval, pde6, 0);
1792
1793                 /* Endianness conversion if necessary for PDE6 */
1794                 pde6->word0 = cpu_to_le32(pde6->word0);
1795                 pde6->word1 = cpu_to_le32(pde6->word1);
1796                 pde6->word2 = cpu_to_le32(pde6->word2);
1797
1798                 /* advance bpl and increment bde count */
1799                 num_bde++;
1800                 bpl++;
1801
1802                 /* setup the first BDE that points to protection buffer */
1803                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
1804                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1805
1806                 /* must be integer multiple of the DIF block length */
1807                 BUG_ON(protgroup_len % 8);
1808
1809                 pde7 = (struct lpfc_pde7 *) bpl;
1810                 memset(pde7, 0, sizeof(struct lpfc_pde7));
1811                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
1812
1813                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
1814                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
1815
1816                 protgrp_blks = protgroup_len / 8;
1817                 protgrp_bytes = protgrp_blks * blksize;
1818
1819                 /* check if this pde is crossing the 4K boundary; if so split */
1820                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
1821                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
1822                         protgroup_offset += protgroup_remainder;
1823                         protgrp_blks = protgroup_remainder / 8;
1824                         protgrp_bytes = protgrp_blks * blksize;
1825                 } else {
1826                         protgroup_offset = 0;
1827                         curr_prot++;
1828                 }
1829
1830                 num_bde++;
1831
1832                 /* setup BDE's for data blocks associated with DIF data */
1833                 pgdone = 0;
1834                 subtotal = 0; /* total bytes processed for current prot grp */
1835                 while (!pgdone) {
1836                         /* Check to see if we ran out of space */
1837                         if (num_bde >= phba->cfg_total_seg_cnt)
1838                                 return num_bde + 1;
1839
1840                         if (!sgde) {
1841                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1842                                         "9065 BLKGRD:%s Invalid data segment\n",
1843                                                 __func__);
1844                                 return 0;
1845                         }
1846                         bpl++;
1847                         dataphysaddr = sg_dma_address(sgde) + split_offset;
1848                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
1849                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
1850
1851                         remainder = sg_dma_len(sgde) - split_offset;
1852
1853                         if ((subtotal + remainder) <= protgrp_bytes) {
1854                                 /* we can use this whole buffer */
1855                                 bpl->tus.f.bdeSize = remainder;
1856                                 split_offset = 0;
1857
1858                                 if ((subtotal + remainder) == protgrp_bytes)
1859                                         pgdone = 1;
1860                         } else {
1861                                 /* must split this buffer with next prot grp */
1862                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
1863                                 split_offset += bpl->tus.f.bdeSize;
1864                         }
1865
1866                         subtotal += bpl->tus.f.bdeSize;
1867
1868                         if (datadir == DMA_TO_DEVICE)
1869                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1870                         else
1871                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1872                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
1873
1874                         num_bde++;
1875                         curr_data++;
1876
1877                         if (split_offset)
1878                                 break;
1879
1880                         /* Move to the next s/g segment if possible */
1881                         sgde = sg_next(sgde);
1882
1883                 }
1884
1885                 if (protgroup_offset) {
1886                         /* update the reference tag */
1887                         reftag += protgrp_blks;
1888                         bpl++;
1889                         continue;
1890                 }
1891
1892                 /* are we done ? */
1893                 if (curr_prot == protcnt) {
1894                         alldone = 1;
1895                 } else if (curr_prot < protcnt) {
1896                         /* advance to next prot buffer */
1897                         sgpe = sg_next(sgpe);
1898                         bpl++;
1899
1900                         /* update the reference tag */
1901                         reftag += protgrp_blks;
1902                 } else {
1903                         /* if we're here, we have a bug */
1904                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1905                                 "9054 BLKGRD: bug in %s\n", __func__);
1906                 }
1907
1908         } while (!alldone);
1909 out:
1910
1911         return num_bde;
1912 }
1913
1914 /**
1915  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
1916  * @phba: The Hba for which this call is being executed.
1917  * @sc: pointer to scsi command we're working on
1918  * @sgl: pointer to buffer list for protection groups
1919  * @datacnt: number of segments of data that have been dma mapped
1920  *
1921  * This function sets up SGL buffer list for protection groups of
1922  * type LPFC_PG_TYPE_NO_DIF
1923  *
1924  * This is usually used when the HBA is instructed to generate
1925  * DIFs and insert them into data stream (or strip DIF from
1926  * incoming data stream)
1927  *
1928  * The buffer list consists of just one protection group described
1929  * below:
1930  *                                +-------------------------+
1931  *   start of prot group  -->     |         DI_SEED         |
1932  *                                +-------------------------+
1933  *                                |         Data SGE        |
1934  *                                +-------------------------+
1935  *                                |more Data SGE's ... (opt)|
1936  *                                +-------------------------+
1937  *
1938  *
1939  * Note: Data s/g buffers have been dma mapped
1940  *
1941  * Returns the number of SGEs added to the SGL.
1942  **/
1943 static int
1944 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1945                 struct sli4_sge *sgl, int datasegcnt,
1946                 struct lpfc_io_buf *lpfc_cmd)
1947 {
1948         struct scatterlist *sgde = NULL; /* s/g data entry */
1949         struct sli4_sge_diseed *diseed = NULL;
1950         dma_addr_t physaddr;
1951         int i = 0, num_sge = 0, status;
1952         uint32_t reftag;
1953         uint8_t txop, rxop;
1954 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1955         uint32_t rc;
1956 #endif
1957         uint32_t checking = 1;
1958         uint32_t dma_len;
1959         uint32_t dma_offset = 0;
1960         struct sli4_hybrid_sgl *sgl_xtra = NULL;
1961         int j;
1962         bool lsp_just_set = false;
1963
1964         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1965         if (status)
1966                 goto out;
1967
1968         /* extract some info from the scsi command for pde*/
1969         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1970
1971 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1972         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1973         if (rc) {
1974                 if (rc & BG_ERR_SWAP)
1975                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1976                 if (rc & BG_ERR_CHECK)
1977                         checking = 0;
1978         }
1979 #endif
1980
1981         /* setup DISEED with what we have */
1982         diseed = (struct sli4_sge_diseed *) sgl;
1983         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
1984         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
1985
1986         /* Endianness conversion if necessary */
1987         diseed->ref_tag = cpu_to_le32(reftag);
1988         diseed->ref_tag_tran = diseed->ref_tag;
1989
1990         /*
1991          * We only need to check the data on READs, for WRITEs
1992          * protection data is automatically generated, not checked.
1993          */
1994         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
1995                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1996                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
1997                 else
1998                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
1999
2000                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2001                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2002                 else
2003                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2004         }
2005
2006         /* setup DISEED with the rest of the info */
2007         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2008         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2009
2010         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2011         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2012
2013         /* Endianness conversion if necessary for DISEED */
2014         diseed->word2 = cpu_to_le32(diseed->word2);
2015         diseed->word3 = cpu_to_le32(diseed->word3);
2016
2017         /* advance bpl and increment sge count */
2018         num_sge++;
2019         sgl++;
2020
2021         /* assumption: caller has already run dma_map_sg on command data */
2022         sgde = scsi_sglist(sc);
2023         j = 3;
2024         for (i = 0; i < datasegcnt; i++) {
2025                 /* clear it */
2026                 sgl->word2 = 0;
2027
2028                 /* do we need to expand the segment */
2029                 if (!lsp_just_set && !((j + 1) % phba->border_sge_num) &&
2030                     ((datasegcnt - 1) != i)) {
2031                         /* set LSP type */
2032                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2033
2034                         sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2035
2036                         if (unlikely(!sgl_xtra)) {
2037                                 lpfc_cmd->seg_cnt = 0;
2038                                 return 0;
2039                         }
2040                         sgl->addr_lo = cpu_to_le32(putPaddrLow(
2041                                                 sgl_xtra->dma_phys_sgl));
2042                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2043                                                 sgl_xtra->dma_phys_sgl));
2044
2045                 } else {
2046                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2047                 }
2048
2049                 if (!(bf_get(lpfc_sli4_sge_type, sgl) & LPFC_SGE_TYPE_LSP)) {
2050                         if ((datasegcnt - 1) == i)
2051                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
2052                         physaddr = sg_dma_address(sgde);
2053                         dma_len = sg_dma_len(sgde);
2054                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2055                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2056
2057                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2058                         sgl->word2 = cpu_to_le32(sgl->word2);
2059                         sgl->sge_len = cpu_to_le32(dma_len);
2060
2061                         dma_offset += dma_len;
2062                         sgde = sg_next(sgde);
2063
2064                         sgl++;
2065                         num_sge++;
2066                         lsp_just_set = false;
2067
2068                 } else {
2069                         sgl->word2 = cpu_to_le32(sgl->word2);
2070                         sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2071
2072                         sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2073                         i = i - 1;
2074
2075                         lsp_just_set = true;
2076                 }
2077
2078                 j++;
2079
2080         }
2081
2082 out:
2083         return num_sge;
2084 }
2085
2086 /**
2087  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2088  * @phba: The Hba for which this call is being executed.
2089  * @sc: pointer to scsi command we're working on
2090  * @sgl: pointer to buffer list for protection groups
2091  * @datacnt: number of segments of data that have been dma mapped
2092  * @protcnt: number of segment of protection data that have been dma mapped
2093  *
2094  * This function sets up SGL buffer list for protection groups of
2095  * type LPFC_PG_TYPE_DIF
2096  *
2097  * This is usually used when DIFs are in their own buffers,
2098  * separate from the data. The HBA can then by instructed
2099  * to place the DIFs in the outgoing stream.  For read operations,
2100  * The HBA could extract the DIFs and place it in DIF buffers.
2101  *
2102  * The buffer list for this type consists of one or more of the
2103  * protection groups described below:
2104  *                                    +-------------------------+
2105  *   start of first prot group  -->   |         DISEED          |
2106  *                                    +-------------------------+
2107  *                                    |      DIF (Prot SGE)     |
2108  *                                    +-------------------------+
2109  *                                    |        Data SGE         |
2110  *                                    +-------------------------+
2111  *                                    |more Data SGE's ... (opt)|
2112  *                                    +-------------------------+
2113  *   start of new  prot group  -->    |         DISEED          |
2114  *                                    +-------------------------+
2115  *                                    |          ...            |
2116  *                                    +-------------------------+
2117  *
2118  * Note: It is assumed that both data and protection s/g buffers have been
2119  *       mapped for DMA
2120  *
2121  * Returns the number of SGEs added to the SGL.
2122  **/
2123 static int
2124 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2125                 struct sli4_sge *sgl, int datacnt, int protcnt,
2126                 struct lpfc_io_buf *lpfc_cmd)
2127 {
2128         struct scatterlist *sgde = NULL; /* s/g data entry */
2129         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2130         struct sli4_sge_diseed *diseed = NULL;
2131         dma_addr_t dataphysaddr, protphysaddr;
2132         unsigned short curr_data = 0, curr_prot = 0;
2133         unsigned int split_offset;
2134         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2135         unsigned int protgrp_blks, protgrp_bytes;
2136         unsigned int remainder, subtotal;
2137         int status;
2138         unsigned char pgdone = 0, alldone = 0;
2139         unsigned blksize;
2140         uint32_t reftag;
2141         uint8_t txop, rxop;
2142         uint32_t dma_len;
2143 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2144         uint32_t rc;
2145 #endif
2146         uint32_t checking = 1;
2147         uint32_t dma_offset = 0;
2148         int num_sge = 0, j = 2;
2149         struct sli4_hybrid_sgl *sgl_xtra = NULL;
2150
2151         sgpe = scsi_prot_sglist(sc);
2152         sgde = scsi_sglist(sc);
2153
2154         if (!sgpe || !sgde) {
2155                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2156                                 "9082 Invalid s/g entry: data=x%px prot=x%px\n",
2157                                 sgpe, sgde);
2158                 return 0;
2159         }
2160
2161         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2162         if (status)
2163                 goto out;
2164
2165         /* extract some info from the scsi command */
2166         blksize = lpfc_cmd_blksize(sc);
2167         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2168
2169 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2170         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2171         if (rc) {
2172                 if (rc & BG_ERR_SWAP)
2173                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2174                 if (rc & BG_ERR_CHECK)
2175                         checking = 0;
2176         }
2177 #endif
2178
2179         split_offset = 0;
2180         do {
2181                 /* Check to see if we ran out of space */
2182                 if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) &&
2183                     !(phba->cfg_xpsgl))
2184                         return num_sge + 3;
2185
2186                 /* DISEED and DIF have to be together */
2187                 if (!((j + 1) % phba->border_sge_num) ||
2188                     !((j + 2) % phba->border_sge_num) ||
2189                     !((j + 3) % phba->border_sge_num)) {
2190                         sgl->word2 = 0;
2191
2192                         /* set LSP type */
2193                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
2194
2195                         sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
2196
2197                         if (unlikely(!sgl_xtra)) {
2198                                 goto out;
2199                         } else {
2200                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2201                                                 sgl_xtra->dma_phys_sgl));
2202                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2203                                                        sgl_xtra->dma_phys_sgl));
2204                         }
2205
2206                         sgl->word2 = cpu_to_le32(sgl->word2);
2207                         sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);
2208
2209                         sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2210                         j = 0;
2211                 }
2212
2213                 /* setup DISEED with what we have */
2214                 diseed = (struct sli4_sge_diseed *) sgl;
2215                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2216                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2217
2218                 /* Endianness conversion if necessary */
2219                 diseed->ref_tag = cpu_to_le32(reftag);
2220                 diseed->ref_tag_tran = diseed->ref_tag;
2221
2222                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2223                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2224
2225                 } else {
2226                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2227                         /*
2228                          * When in this mode, the hardware will replace
2229                          * the guard tag from the host with a
2230                          * newly generated good CRC for the wire.
2231                          * Switch to raw mode here to avoid this
2232                          * behavior. What the host sends gets put on the wire.
2233                          */
2234                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2235                                 txop = BG_OP_RAW_MODE;
2236                                 rxop = BG_OP_RAW_MODE;
2237                         }
2238                 }
2239
2240
2241                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2242                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2243                 else
2244                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2245
2246                 /* setup DISEED with the rest of the info */
2247                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2248                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2249
2250                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2251                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2252
2253                 /* Endianness conversion if necessary for DISEED */
2254                 diseed->word2 = cpu_to_le32(diseed->word2);
2255                 diseed->word3 = cpu_to_le32(diseed->word3);
2256
2257                 /* advance sgl and increment bde count */
2258                 num_sge++;
2259
2260                 sgl++;
2261                 j++;
2262
2263                 /* setup the first BDE that points to protection buffer */
2264                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2265                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2266
2267                 /* must be integer multiple of the DIF block length */
2268                 BUG_ON(protgroup_len % 8);
2269
2270                 /* Now setup DIF SGE */
2271                 sgl->word2 = 0;
2272                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2273                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2274                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2275                 sgl->word2 = cpu_to_le32(sgl->word2);
2276                 sgl->sge_len = 0;
2277
2278                 protgrp_blks = protgroup_len / 8;
2279                 protgrp_bytes = protgrp_blks * blksize;
2280
2281                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2282                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2283                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2284                         protgroup_offset += protgroup_remainder;
2285                         protgrp_blks = protgroup_remainder / 8;
2286                         protgrp_bytes = protgrp_blks * blksize;
2287                 } else {
2288                         protgroup_offset = 0;
2289                         curr_prot++;
2290                 }
2291
2292                 num_sge++;
2293
2294                 /* setup SGE's for data blocks associated with DIF data */
2295                 pgdone = 0;
2296                 subtotal = 0; /* total bytes processed for current prot grp */
2297
2298                 sgl++;
2299                 j++;
2300
2301                 while (!pgdone) {
2302                         /* Check to see if we ran out of space */
2303                         if ((num_sge >= phba->cfg_total_seg_cnt) &&
2304                             !phba->cfg_xpsgl)
2305                                 return num_sge + 1;
2306
2307                         if (!sgde) {
2308                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2309                                         "9086 BLKGRD:%s Invalid data segment\n",
2310                                                 __func__);
2311                                 return 0;
2312                         }
2313
2314                         if (!((j + 1) % phba->border_sge_num)) {
2315                                 sgl->word2 = 0;
2316
2317                                 /* set LSP type */
2318                                 bf_set(lpfc_sli4_sge_type, sgl,
2319                                        LPFC_SGE_TYPE_LSP);
2320
2321                                 sgl_xtra = lpfc_get_sgl_per_hdwq(phba,
2322                                                                  lpfc_cmd);
2323
2324                                 if (unlikely(!sgl_xtra)) {
2325                                         goto out;
2326                                 } else {
2327                                         sgl->addr_lo = cpu_to_le32(
2328                                           putPaddrLow(sgl_xtra->dma_phys_sgl));
2329                                         sgl->addr_hi = cpu_to_le32(
2330                                           putPaddrHigh(sgl_xtra->dma_phys_sgl));
2331                                 }
2332
2333                                 sgl->word2 = cpu_to_le32(sgl->word2);
2334                                 sgl->sge_len = cpu_to_le32(
2335                                                      phba->cfg_sg_dma_buf_size);
2336
2337                                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2338                         } else {
2339                                 dataphysaddr = sg_dma_address(sgde) +
2340                                                                    split_offset;
2341
2342                                 remainder = sg_dma_len(sgde) - split_offset;
2343
2344                                 if ((subtotal + remainder) <= protgrp_bytes) {
2345                                         /* we can use this whole buffer */
2346                                         dma_len = remainder;
2347                                         split_offset = 0;
2348
2349                                         if ((subtotal + remainder) ==
2350                                                                   protgrp_bytes)
2351                                                 pgdone = 1;
2352                                 } else {
2353                                         /* must split this buffer with next
2354                                          * prot grp
2355                                          */
2356                                         dma_len = protgrp_bytes - subtotal;
2357                                         split_offset += dma_len;
2358                                 }
2359
2360                                 subtotal += dma_len;
2361
2362                                 sgl->word2 = 0;
2363                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
2364                                                                  dataphysaddr));
2365                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
2366                                                                  dataphysaddr));
2367                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2368                                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2369                                 bf_set(lpfc_sli4_sge_type, sgl,
2370                                        LPFC_SGE_TYPE_DATA);
2371
2372                                 sgl->sge_len = cpu_to_le32(dma_len);
2373                                 dma_offset += dma_len;
2374
2375                                 num_sge++;
2376                                 curr_data++;
2377
2378                                 if (split_offset) {
2379                                         sgl++;
2380                                         j++;
2381                                         break;
2382                                 }
2383
2384                                 /* Move to the next s/g segment if possible */
2385                                 sgde = sg_next(sgde);
2386
2387                                 sgl++;
2388                         }
2389
2390                         j++;
2391                 }
2392
2393                 if (protgroup_offset) {
2394                         /* update the reference tag */
2395                         reftag += protgrp_blks;
2396                         continue;
2397                 }
2398
2399                 /* are we done ? */
2400                 if (curr_prot == protcnt) {
2401                         /* mark the last SGL */
2402                         sgl--;
2403                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2404                         alldone = 1;
2405                 } else if (curr_prot < protcnt) {
2406                         /* advance to next prot buffer */
2407                         sgpe = sg_next(sgpe);
2408
2409                         /* update the reference tag */
2410                         reftag += protgrp_blks;
2411                 } else {
2412                         /* if we're here, we have a bug */
2413                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2414                                 "9085 BLKGRD: bug in %s\n", __func__);
2415                 }
2416
2417         } while (!alldone);
2418
2419 out:
2420
2421         return num_sge;
2422 }
2423
2424 /**
2425  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2426  * @phba: The Hba for which this call is being executed.
2427  * @sc: pointer to scsi command we're working on
2428  *
2429  * Given a SCSI command that supports DIF, determine composition of protection
2430  * groups involved in setting up buffer lists
2431  *
2432  * Returns: Protection group type (with or without DIF)
2433  *
2434  **/
2435 static int
2436 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2437 {
2438         int ret = LPFC_PG_TYPE_INVALID;
2439         unsigned char op = scsi_get_prot_op(sc);
2440
2441         switch (op) {
2442         case SCSI_PROT_READ_STRIP:
2443         case SCSI_PROT_WRITE_INSERT:
2444                 ret = LPFC_PG_TYPE_NO_DIF;
2445                 break;
2446         case SCSI_PROT_READ_INSERT:
2447         case SCSI_PROT_WRITE_STRIP:
2448         case SCSI_PROT_READ_PASS:
2449         case SCSI_PROT_WRITE_PASS:
2450                 ret = LPFC_PG_TYPE_DIF_BUF;
2451                 break;
2452         default:
2453                 if (phba)
2454                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2455                                         "9021 Unsupported protection op:%d\n",
2456                                         op);
2457                 break;
2458         }
2459         return ret;
2460 }
2461
2462 /**
2463  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2464  * @phba: The Hba for which this call is being executed.
2465  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2466  *
2467  * Adjust the data length to account for how much data
2468  * is actually on the wire.
2469  *
2470  * returns the adjusted data length
2471  **/
2472 static int
2473 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2474                        struct lpfc_io_buf *lpfc_cmd)
2475 {
2476         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2477         int fcpdl;
2478
2479         fcpdl = scsi_bufflen(sc);
2480
2481         /* Check if there is protection data on the wire */
2482         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2483                 /* Read check for protection data */
2484                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2485                         return fcpdl;
2486
2487         } else {
2488                 /* Write check for protection data */
2489                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2490                         return fcpdl;
2491         }
2492
2493         /*
2494          * If we are in DIF Type 1 mode every data block has a 8 byte
2495          * DIF (trailer) attached to it. Must ajust FCP data length
2496          * to account for the protection data.
2497          */
2498         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2499
2500         return fcpdl;
2501 }
2502
2503 /**
2504  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2505  * @phba: The Hba for which this call is being executed.
2506  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2507  *
2508  * This is the protection/DIF aware version of
2509  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2510  * two functions eventually, but for now, it's here.
2511  * RETURNS 0 - SUCCESS,
2512  *         1 - Failed DMA map, retry.
2513  *         2 - Invalid scsi cmd or prot-type. Do not rety.
2514  **/
2515 static int
2516 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2517                 struct lpfc_io_buf *lpfc_cmd)
2518 {
2519         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2520         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2521         struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
2522         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2523         uint32_t num_bde = 0;
2524         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2525         int prot_group_type = 0;
2526         int fcpdl;
2527         int ret = 1;
2528         struct lpfc_vport *vport = phba->pport;
2529
2530         /*
2531          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2532          *  fcp_rsp regions to the first data bde entry
2533          */
2534         bpl += 2;
2535         if (scsi_sg_count(scsi_cmnd)) {
2536                 /*
2537                  * The driver stores the segment count returned from pci_map_sg
2538                  * because this a count of dma-mappings used to map the use_sg
2539                  * pages.  They are not guaranteed to be the same for those
2540                  * architectures that implement an IOMMU.
2541                  */
2542                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2543                                         scsi_sglist(scsi_cmnd),
2544                                         scsi_sg_count(scsi_cmnd), datadir);
2545                 if (unlikely(!datasegcnt))
2546                         return 1;
2547
2548                 lpfc_cmd->seg_cnt = datasegcnt;
2549
2550                 /* First check if data segment count from SCSI Layer is good */
2551                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2552                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
2553                         ret = 2;
2554                         goto err;
2555                 }
2556
2557                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2558
2559                 switch (prot_group_type) {
2560                 case LPFC_PG_TYPE_NO_DIF:
2561
2562                         /* Here we need to add a PDE5 and PDE6 to the count */
2563                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) {
2564                                 ret = 2;
2565                                 goto err;
2566                         }
2567
2568                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2569                                         datasegcnt);
2570                         /* we should have 2 or more entries in buffer list */
2571                         if (num_bde < 2) {
2572                                 ret = 2;
2573                                 goto err;
2574                         }
2575                         break;
2576
2577                 case LPFC_PG_TYPE_DIF_BUF:
2578                         /*
2579                          * This type indicates that protection buffers are
2580                          * passed to the driver, so that needs to be prepared
2581                          * for DMA
2582                          */
2583                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2584                                         scsi_prot_sglist(scsi_cmnd),
2585                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2586                         if (unlikely(!protsegcnt)) {
2587                                 scsi_dma_unmap(scsi_cmnd);
2588                                 return 1;
2589                         }
2590
2591                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2592
2593                         /*
2594                          * There is a minimun of 4 BPLs used for every
2595                          * protection data segment.
2596                          */
2597                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2598                             (phba->cfg_total_seg_cnt - 2)) {
2599                                 ret = 2;
2600                                 goto err;
2601                         }
2602
2603                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2604                                         datasegcnt, protsegcnt);
2605                         /* we should have 3 or more entries in buffer list */
2606                         if ((num_bde < 3) ||
2607                             (num_bde > phba->cfg_total_seg_cnt)) {
2608                                 ret = 2;
2609                                 goto err;
2610                         }
2611                         break;
2612
2613                 case LPFC_PG_TYPE_INVALID:
2614                 default:
2615                         scsi_dma_unmap(scsi_cmnd);
2616                         lpfc_cmd->seg_cnt = 0;
2617
2618                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2619                                         "9022 Unexpected protection group %i\n",
2620                                         prot_group_type);
2621                         return 2;
2622                 }
2623         }
2624
2625         /*
2626          * Finish initializing those IOCB fields that are dependent on the
2627          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2628          * reinitialized since all iocb memory resources are used many times
2629          * for transmit, receive, and continuation bpl's.
2630          */
2631         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2632         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2633         iocb_cmd->ulpBdeCount = 1;
2634         iocb_cmd->ulpLe = 1;
2635
2636         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2637         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2638
2639         /*
2640          * Due to difference in data length between DIF/non-DIF paths,
2641          * we need to set word 4 of IOCB here
2642          */
2643         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2644
2645         /*
2646          * For First burst, we may need to adjust the initial transfer
2647          * length for DIF
2648          */
2649         if (iocb_cmd->un.fcpi.fcpi_XRdy &&
2650             (fcpdl < vport->cfg_first_burst_size))
2651                 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
2652
2653         return 0;
2654 err:
2655         if (lpfc_cmd->seg_cnt)
2656                 scsi_dma_unmap(scsi_cmnd);
2657         if (lpfc_cmd->prot_seg_cnt)
2658                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2659                              scsi_prot_sg_count(scsi_cmnd),
2660                              scsi_cmnd->sc_data_direction);
2661
2662         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2663                         "9023 Cannot setup S/G List for HBA"
2664                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2665                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2666                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2667                         prot_group_type, num_bde);
2668
2669         lpfc_cmd->seg_cnt = 0;
2670         lpfc_cmd->prot_seg_cnt = 0;
2671         return ret;
2672 }
2673
2674 /*
2675  * This function calcuates the T10 DIF guard tag
2676  * on the specified data using a CRC algorithmn
2677  * using crc_t10dif.
2678  */
2679 static uint16_t
2680 lpfc_bg_crc(uint8_t *data, int count)
2681 {
2682         uint16_t crc = 0;
2683         uint16_t x;
2684
2685         crc = crc_t10dif(data, count);
2686         x = cpu_to_be16(crc);
2687         return x;
2688 }
2689
2690 /*
2691  * This function calcuates the T10 DIF guard tag
2692  * on the specified data using a CSUM algorithmn
2693  * using ip_compute_csum.
2694  */
2695 static uint16_t
2696 lpfc_bg_csum(uint8_t *data, int count)
2697 {
2698         uint16_t ret;
2699
2700         ret = ip_compute_csum(data, count);
2701         return ret;
2702 }
2703
2704 /*
2705  * This function examines the protection data to try to determine
2706  * what type of T10-DIF error occurred.
2707  */
2708 static void
2709 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
2710 {
2711         struct scatterlist *sgpe; /* s/g prot entry */
2712         struct scatterlist *sgde; /* s/g data entry */
2713         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2714         struct scsi_dif_tuple *src = NULL;
2715         uint8_t *data_src = NULL;
2716         uint16_t guard_tag;
2717         uint16_t start_app_tag, app_tag;
2718         uint32_t start_ref_tag, ref_tag;
2719         int prot, protsegcnt;
2720         int err_type, len, data_len;
2721         int chk_ref, chk_app, chk_guard;
2722         uint16_t sum;
2723         unsigned blksize;
2724
2725         err_type = BGS_GUARD_ERR_MASK;
2726         sum = 0;
2727         guard_tag = 0;
2728
2729         /* First check to see if there is protection data to examine */
2730         prot = scsi_get_prot_op(cmd);
2731         if ((prot == SCSI_PROT_READ_STRIP) ||
2732             (prot == SCSI_PROT_WRITE_INSERT) ||
2733             (prot == SCSI_PROT_NORMAL))
2734                 goto out;
2735
2736         /* Currently the driver just supports ref_tag and guard_tag checking */
2737         chk_ref = 1;
2738         chk_app = 0;
2739         chk_guard = 0;
2740
2741         /* Setup a ptr to the protection data provided by the SCSI host */
2742         sgpe = scsi_prot_sglist(cmd);
2743         protsegcnt = lpfc_cmd->prot_seg_cnt;
2744
2745         if (sgpe && protsegcnt) {
2746
2747                 /*
2748                  * We will only try to verify guard tag if the segment
2749                  * data length is a multiple of the blksize.
2750                  */
2751                 sgde = scsi_sglist(cmd);
2752                 blksize = lpfc_cmd_blksize(cmd);
2753                 data_src = (uint8_t *)sg_virt(sgde);
2754                 data_len = sgde->length;
2755                 if ((data_len & (blksize - 1)) == 0)
2756                         chk_guard = 1;
2757
2758                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2759                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2760                 start_app_tag = src->app_tag;
2761                 len = sgpe->length;
2762                 while (src && protsegcnt) {
2763                         while (len) {
2764
2765                                 /*
2766                                  * First check to see if a protection data
2767                                  * check is valid
2768                                  */
2769                                 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2770                                     (src->app_tag == T10_PI_APP_ESCAPE)) {
2771                                         start_ref_tag++;
2772                                         goto skipit;
2773                                 }
2774
2775                                 /* First Guard Tag checking */
2776                                 if (chk_guard) {
2777                                         guard_tag = src->guard_tag;
2778                                         if (lpfc_cmd_guard_csum(cmd))
2779                                                 sum = lpfc_bg_csum(data_src,
2780                                                                    blksize);
2781                                         else
2782                                                 sum = lpfc_bg_crc(data_src,
2783                                                                   blksize);
2784                                         if ((guard_tag != sum)) {
2785                                                 err_type = BGS_GUARD_ERR_MASK;
2786                                                 goto out;
2787                                         }
2788                                 }
2789
2790                                 /* Reference Tag checking */
2791                                 ref_tag = be32_to_cpu(src->ref_tag);
2792                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2793                                         err_type = BGS_REFTAG_ERR_MASK;
2794                                         goto out;
2795                                 }
2796                                 start_ref_tag++;
2797
2798                                 /* App Tag checking */
2799                                 app_tag = src->app_tag;
2800                                 if (chk_app && (app_tag != start_app_tag)) {
2801                                         err_type = BGS_APPTAG_ERR_MASK;
2802                                         goto out;
2803                                 }
2804 skipit:
2805                                 len -= sizeof(struct scsi_dif_tuple);
2806                                 if (len < 0)
2807                                         len = 0;
2808                                 src++;
2809
2810                                 data_src += blksize;
2811                                 data_len -= blksize;
2812
2813                                 /*
2814                                  * Are we at the end of the Data segment?
2815                                  * The data segment is only used for Guard
2816                                  * tag checking.
2817                                  */
2818                                 if (chk_guard && (data_len == 0)) {
2819                                         chk_guard = 0;
2820                                         sgde = sg_next(sgde);
2821                                         if (!sgde)
2822                                                 goto out;
2823
2824                                         data_src = (uint8_t *)sg_virt(sgde);
2825                                         data_len = sgde->length;
2826                                         if ((data_len & (blksize - 1)) == 0)
2827                                                 chk_guard = 1;
2828                                 }
2829                         }
2830
2831                         /* Goto the next Protection data segment */
2832                         sgpe = sg_next(sgpe);
2833                         if (sgpe) {
2834                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2835                                 len = sgpe->length;
2836                         } else {
2837                                 src = NULL;
2838                         }
2839                         protsegcnt--;
2840                 }
2841         }
2842 out:
2843         if (err_type == BGS_GUARD_ERR_MASK) {
2844                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2845                                         0x10, 0x1);
2846                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2847                               SAM_STAT_CHECK_CONDITION;
2848                 phba->bg_guard_err_cnt++;
2849                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2850                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
2851                                 (unsigned long)scsi_get_lba(cmd),
2852                                 sum, guard_tag);
2853
2854         } else if (err_type == BGS_REFTAG_ERR_MASK) {
2855                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2856                                         0x10, 0x3);
2857                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2858                               SAM_STAT_CHECK_CONDITION;
2859
2860                 phba->bg_reftag_err_cnt++;
2861                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2862                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
2863                                 (unsigned long)scsi_get_lba(cmd),
2864                                 ref_tag, start_ref_tag);
2865
2866         } else if (err_type == BGS_APPTAG_ERR_MASK) {
2867                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2868                                         0x10, 0x2);
2869                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2870                               SAM_STAT_CHECK_CONDITION;
2871
2872                 phba->bg_apptag_err_cnt++;
2873                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2874                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
2875                                 (unsigned long)scsi_get_lba(cmd),
2876                                 app_tag, start_app_tag);
2877         }
2878 }
2879
2880
2881 /*
2882  * This function checks for BlockGuard errors detected by
2883  * the HBA.  In case of errors, the ASC/ASCQ fields in the
2884  * sense buffer will be set accordingly, paired with
2885  * ILLEGAL_REQUEST to signal to the kernel that the HBA
2886  * detected corruption.
2887  *
2888  * Returns:
2889  *  0 - No error found
2890  *  1 - BlockGuard error found
2891  * -1 - Internal error (bad profile, ...etc)
2892  */
2893 static int
2894 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
2895                   struct lpfc_iocbq *pIocbOut)
2896 {
2897         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2898         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
2899         int ret = 0;
2900         uint32_t bghm = bgf->bghm;
2901         uint32_t bgstat = bgf->bgstat;
2902         uint64_t failing_sector = 0;
2903
2904         if (lpfc_bgs_get_invalid_prof(bgstat)) {
2905                 cmd->result = DID_ERROR << 16;
2906                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2907                                 "9072 BLKGRD: Invalid BG Profile in cmd"
2908                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2909                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2910                                 (unsigned long long)scsi_get_lba(cmd),
2911                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2912                 ret = (-1);
2913                 goto out;
2914         }
2915
2916         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
2917                 cmd->result = DID_ERROR << 16;
2918                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2919                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
2920                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2921                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2922                                 (unsigned long long)scsi_get_lba(cmd),
2923                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2924                 ret = (-1);
2925                 goto out;
2926         }
2927
2928         if (lpfc_bgs_get_guard_err(bgstat)) {
2929                 ret = 1;
2930
2931                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2932                                 0x10, 0x1);
2933                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2934                               SAM_STAT_CHECK_CONDITION;
2935                 phba->bg_guard_err_cnt++;
2936                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2937                                 "9055 BLKGRD: Guard Tag error in cmd"
2938                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2939                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2940                                 (unsigned long long)scsi_get_lba(cmd),
2941                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2942         }
2943
2944         if (lpfc_bgs_get_reftag_err(bgstat)) {
2945                 ret = 1;
2946
2947                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2948                                 0x10, 0x3);
2949                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2950                               SAM_STAT_CHECK_CONDITION;
2951
2952                 phba->bg_reftag_err_cnt++;
2953                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2954                                 "9056 BLKGRD: Ref Tag error in cmd"
2955                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2956                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2957                                 (unsigned long long)scsi_get_lba(cmd),
2958                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2959         }
2960
2961         if (lpfc_bgs_get_apptag_err(bgstat)) {
2962                 ret = 1;
2963
2964                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
2965                                 0x10, 0x2);
2966                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
2967                               SAM_STAT_CHECK_CONDITION;
2968
2969                 phba->bg_apptag_err_cnt++;
2970                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
2971                                 "9061 BLKGRD: App Tag error in cmd"
2972                                 " 0x%x lba 0x%llx blk cnt 0x%x "
2973                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
2974                                 (unsigned long long)scsi_get_lba(cmd),
2975                                 blk_rq_sectors(cmd->request), bgstat, bghm);
2976         }
2977
2978         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
2979                 /*
2980                  * setup sense data descriptor 0 per SPC-4 as an information
2981                  * field, and put the failing LBA in it.
2982                  * This code assumes there was also a guard/app/ref tag error
2983                  * indication.
2984                  */
2985                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
2986                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
2987                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
2988                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
2989
2990                 /* bghm is a "on the wire" FC frame based count */
2991                 switch (scsi_get_prot_op(cmd)) {
2992                 case SCSI_PROT_READ_INSERT:
2993                 case SCSI_PROT_WRITE_STRIP:
2994                         bghm /= cmd->device->sector_size;
2995                         break;
2996                 case SCSI_PROT_READ_STRIP:
2997                 case SCSI_PROT_WRITE_INSERT:
2998                 case SCSI_PROT_READ_PASS:
2999                 case SCSI_PROT_WRITE_PASS:
3000                         bghm /= (cmd->device->sector_size +
3001                                 sizeof(struct scsi_dif_tuple));
3002                         break;
3003                 }
3004
3005                 failing_sector = scsi_get_lba(cmd);
3006                 failing_sector += bghm;
3007
3008                 /* Descriptor Information */
3009                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3010         }
3011
3012         if (!ret) {
3013                 /* No error was reported - problem in FW? */
3014                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3015                                 "9057 BLKGRD: Unknown error in cmd"
3016                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3017                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3018                                 (unsigned long long)scsi_get_lba(cmd),
3019                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3020
3021                 /* Calcuate what type of error it was */
3022                 lpfc_calc_bg_err(phba, lpfc_cmd);
3023         }
3024 out:
3025         return ret;
3026 }
3027
3028 /**
3029  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3030  * @phba: The Hba for which this call is being executed.
3031  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3032  *
3033  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3034  * field of @lpfc_cmd for device with SLI-4 interface spec.
3035  *
3036  * Return codes:
3037  *      2 - Error - Do not retry
3038  *      1 - Error - Retry
3039  *      0 - Success
3040  **/
3041 static int
3042 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3043 {
3044         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3045         struct scatterlist *sgel = NULL;
3046         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3047         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
3048         struct sli4_sge *first_data_sgl;
3049         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3050         dma_addr_t physaddr;
3051         uint32_t num_bde = 0;
3052         uint32_t dma_len;
3053         uint32_t dma_offset = 0;
3054         int nseg, i, j;
3055         struct ulp_bde64 *bde;
3056         bool lsp_just_set = false;
3057         struct sli4_hybrid_sgl *sgl_xtra = NULL;
3058
3059         /*
3060          * There are three possibilities here - use scatter-gather segment, use
3061          * the single mapping, or neither.  Start the lpfc command prep by
3062          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3063          * data bde entry.
3064          */
3065         if (scsi_sg_count(scsi_cmnd)) {
3066                 /*
3067                  * The driver stores the segment count returned from pci_map_sg
3068                  * because this a count of dma-mappings used to map the use_sg
3069                  * pages.  They are not guaranteed to be the same for those
3070                  * architectures that implement an IOMMU.
3071                  */
3072
3073                 nseg = scsi_dma_map(scsi_cmnd);
3074                 if (unlikely(nseg <= 0))
3075                         return 1;
3076                 sgl += 1;
3077                 /* clear the last flag in the fcp_rsp map entry */
3078                 sgl->word2 = le32_to_cpu(sgl->word2);
3079                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3080                 sgl->word2 = cpu_to_le32(sgl->word2);
3081                 sgl += 1;
3082                 first_data_sgl = sgl;
3083                 lpfc_cmd->seg_cnt = nseg;
3084                 if (!phba->cfg_xpsgl &&
3085                     lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3086                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3087                                 " %s: Too many sg segments from "
3088                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3089                                 __func__, phba->cfg_sg_seg_cnt,
3090                                lpfc_cmd->seg_cnt);
3091                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3092                         lpfc_cmd->seg_cnt = 0;
3093                         scsi_dma_unmap(scsi_cmnd);
3094                         return 2;
3095                 }
3096
3097                 /*
3098                  * The driver established a maximum scatter-gather segment count
3099                  * during probe that limits the number of sg elements in any
3100                  * single scsi command.  Just run through the seg_cnt and format
3101                  * the sge's.
3102                  * When using SLI-3 the driver will try to fit all the BDEs into
3103                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3104                  * does for SLI-2 mode.
3105                  */
3106
3107                 /* for tracking segment boundaries */
3108                 sgel = scsi_sglist(scsi_cmnd);
3109                 j = 2;
3110                 for (i = 0; i < nseg; i++) {
3111                         sgl->word2 = 0;
3112                         if ((num_bde + 1) == nseg) {
3113                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3114                                 bf_set(lpfc_sli4_sge_type, sgl,
3115                                        LPFC_SGE_TYPE_DATA);
3116                         } else {
3117                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3118
3119                                 /* do we need to expand the segment */
3120                                 if (!lsp_just_set &&
3121                                     !((j + 1) % phba->border_sge_num) &&
3122                                     ((nseg - 1) != i)) {
3123                                         /* set LSP type */
3124                                         bf_set(lpfc_sli4_sge_type, sgl,
3125                                                LPFC_SGE_TYPE_LSP);
3126
3127                                         sgl_xtra = lpfc_get_sgl_per_hdwq(
3128                                                         phba, lpfc_cmd);
3129
3130                                         if (unlikely(!sgl_xtra)) {
3131                                                 lpfc_cmd->seg_cnt = 0;
3132                                                 scsi_dma_unmap(scsi_cmnd);
3133                                                 return 1;
3134                                         }
3135                                         sgl->addr_lo = cpu_to_le32(putPaddrLow(
3136                                                        sgl_xtra->dma_phys_sgl));
3137                                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3138                                                        sgl_xtra->dma_phys_sgl));
3139
3140                                 } else {
3141                                         bf_set(lpfc_sli4_sge_type, sgl,
3142                                                LPFC_SGE_TYPE_DATA);
3143                                 }
3144                         }
3145
3146                         if (!(bf_get(lpfc_sli4_sge_type, sgl) &
3147                                      LPFC_SGE_TYPE_LSP)) {
3148                                 if ((nseg - 1) == i)
3149                                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3150
3151                                 physaddr = sg_dma_address(sgel);
3152                                 dma_len = sg_dma_len(sgel);
3153                                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
3154                                                            physaddr));
3155                                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
3156                                                            physaddr));
3157
3158                                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3159                                 sgl->word2 = cpu_to_le32(sgl->word2);
3160                                 sgl->sge_len = cpu_to_le32(dma_len);
3161
3162                                 dma_offset += dma_len;
3163                                 sgel = sg_next(sgel);
3164
3165                                 sgl++;
3166                                 lsp_just_set = false;
3167
3168                         } else {
3169                                 sgl->word2 = cpu_to_le32(sgl->word2);
3170                                 sgl->sge_len = cpu_to_le32(
3171                                                      phba->cfg_sg_dma_buf_size);
3172
3173                                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
3174                                 i = i - 1;
3175
3176                                 lsp_just_set = true;
3177                         }
3178
3179                         j++;
3180                 }
3181                 /*
3182                  * Setup the first Payload BDE. For FCoE we just key off
3183                  * Performance Hints, for FC we use lpfc_enable_pbde.
3184                  * We populate words 13-15 of IOCB/WQE.
3185                  */
3186                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3187                     phba->cfg_enable_pbde) {
3188                         bde = (struct ulp_bde64 *)
3189                                 &(iocb_cmd->unsli3.sli3Words[5]);
3190                         bde->addrLow = first_data_sgl->addr_lo;
3191                         bde->addrHigh = first_data_sgl->addr_hi;
3192                         bde->tus.f.bdeSize =
3193                                         le32_to_cpu(first_data_sgl->sge_len);
3194                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3195                         bde->tus.w = cpu_to_le32(bde->tus.w);
3196                 }
3197         } else {
3198                 sgl += 1;
3199                 /* clear the last flag in the fcp_rsp map entry */
3200                 sgl->word2 = le32_to_cpu(sgl->word2);
3201                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3202                 sgl->word2 = cpu_to_le32(sgl->word2);
3203
3204                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3205                     phba->cfg_enable_pbde) {
3206                         bde = (struct ulp_bde64 *)
3207                                 &(iocb_cmd->unsli3.sli3Words[5]);
3208                         memset(bde, 0, (sizeof(uint32_t) * 3));
3209                 }
3210         }
3211
3212         /*
3213          * Finish initializing those IOCB fields that are dependent on the
3214          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3215          * explicitly reinitialized.
3216          * all iocb memory resources are reused.
3217          */
3218         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3219
3220         /*
3221          * Due to difference in data length between DIF/non-DIF paths,
3222          * we need to set word 4 of IOCB here
3223          */
3224         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3225
3226         /*
3227          * If the OAS driver feature is enabled and the lun is enabled for
3228          * OAS, set the oas iocb related flags.
3229          */
3230         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3231                 scsi_cmnd->device->hostdata)->oas_enabled) {
3232                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3233                 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3234                         scsi_cmnd->device->hostdata)->priority;
3235         }
3236
3237         return 0;
3238 }
3239
3240 /**
3241  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3242  * @phba: The Hba for which this call is being executed.
3243  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3244  *
3245  * This is the protection/DIF aware version of
3246  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3247  * two functions eventually, but for now, it's here
3248  * Return codes:
3249  *      2 - Error - Do not retry
3250  *      1 - Error - Retry
3251  *      0 - Success
3252  **/
3253 static int
3254 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3255                 struct lpfc_io_buf *lpfc_cmd)
3256 {
3257         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3258         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3259         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl);
3260         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3261         uint32_t num_sge = 0;
3262         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3263         int prot_group_type = 0;
3264         int fcpdl;
3265         int ret = 1;
3266         struct lpfc_vport *vport = phba->pport;
3267
3268         /*
3269          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3270          *  fcp_rsp regions to the first data sge entry
3271          */
3272         if (scsi_sg_count(scsi_cmnd)) {
3273                 /*
3274                  * The driver stores the segment count returned from pci_map_sg
3275                  * because this a count of dma-mappings used to map the use_sg
3276                  * pages.  They are not guaranteed to be the same for those
3277                  * architectures that implement an IOMMU.
3278                  */
3279                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3280                                         scsi_sglist(scsi_cmnd),
3281                                         scsi_sg_count(scsi_cmnd), datadir);
3282                 if (unlikely(!datasegcnt))
3283                         return 1;
3284
3285                 sgl += 1;
3286                 /* clear the last flag in the fcp_rsp map entry */
3287                 sgl->word2 = le32_to_cpu(sgl->word2);
3288                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3289                 sgl->word2 = cpu_to_le32(sgl->word2);
3290
3291                 sgl += 1;
3292                 lpfc_cmd->seg_cnt = datasegcnt;
3293
3294                 /* First check if data segment count from SCSI Layer is good */
3295                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt &&
3296                     !phba->cfg_xpsgl) {
3297                         WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3298                         ret = 2;
3299                         goto err;
3300                 }
3301
3302                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3303
3304                 switch (prot_group_type) {
3305                 case LPFC_PG_TYPE_NO_DIF:
3306                         /* Here we need to add a DISEED to the count */
3307                         if (((lpfc_cmd->seg_cnt + 1) >
3308                                         phba->cfg_total_seg_cnt) &&
3309                             !phba->cfg_xpsgl) {
3310                                 ret = 2;
3311                                 goto err;
3312                         }
3313
3314                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3315                                         datasegcnt, lpfc_cmd);
3316
3317                         /* we should have 2 or more entries in buffer list */
3318                         if (num_sge < 2) {
3319                                 ret = 2;
3320                                 goto err;
3321                         }
3322                         break;
3323
3324                 case LPFC_PG_TYPE_DIF_BUF:
3325                         /*
3326                          * This type indicates that protection buffers are
3327                          * passed to the driver, so that needs to be prepared
3328                          * for DMA
3329                          */
3330                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3331                                         scsi_prot_sglist(scsi_cmnd),
3332                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3333                         if (unlikely(!protsegcnt)) {
3334                                 scsi_dma_unmap(scsi_cmnd);
3335                                 return 1;
3336                         }
3337
3338                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3339                         /*
3340                          * There is a minimun of 3 SGEs used for every
3341                          * protection data segment.
3342                          */
3343                         if (((lpfc_cmd->prot_seg_cnt * 3) >
3344                                         (phba->cfg_total_seg_cnt - 2)) &&
3345                             !phba->cfg_xpsgl) {
3346                                 ret = 2;
3347                                 goto err;
3348                         }
3349
3350                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3351                                         datasegcnt, protsegcnt, lpfc_cmd);
3352
3353                         /* we should have 3 or more entries in buffer list */
3354                         if (num_sge < 3 ||
3355                             (num_sge > phba->cfg_total_seg_cnt &&
3356                              !phba->cfg_xpsgl)) {
3357                                 ret = 2;
3358                                 goto err;
3359                         }
3360                         break;
3361
3362                 case LPFC_PG_TYPE_INVALID:
3363                 default:
3364                         scsi_dma_unmap(scsi_cmnd);
3365                         lpfc_cmd->seg_cnt = 0;
3366
3367                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3368                                         "9083 Unexpected protection group %i\n",
3369                                         prot_group_type);
3370                         return 2;
3371                 }
3372         }
3373
3374         switch (scsi_get_prot_op(scsi_cmnd)) {
3375         case SCSI_PROT_WRITE_STRIP:
3376         case SCSI_PROT_READ_STRIP:
3377                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3378                 break;
3379         case SCSI_PROT_WRITE_INSERT:
3380         case SCSI_PROT_READ_INSERT:
3381                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3382                 break;
3383         case SCSI_PROT_WRITE_PASS:
3384         case SCSI_PROT_READ_PASS:
3385                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3386                 break;
3387         }
3388
3389         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3390         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3391
3392         /*
3393          * Due to difference in data length between DIF/non-DIF paths,
3394          * we need to set word 4 of IOCB here
3395          */
3396         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3397
3398         /*
3399          * For First burst, we may need to adjust the initial transfer
3400          * length for DIF
3401          */
3402         if (iocb_cmd->un.fcpi.fcpi_XRdy &&
3403             (fcpdl < vport->cfg_first_burst_size))
3404                 iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
3405
3406         /*
3407          * If the OAS driver feature is enabled and the lun is enabled for
3408          * OAS, set the oas iocb related flags.
3409          */
3410         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3411                 scsi_cmnd->device->hostdata)->oas_enabled)
3412                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3413
3414         return 0;
3415 err:
3416         if (lpfc_cmd->seg_cnt)
3417                 scsi_dma_unmap(scsi_cmnd);
3418         if (lpfc_cmd->prot_seg_cnt)
3419                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3420                              scsi_prot_sg_count(scsi_cmnd),
3421                              scsi_cmnd->sc_data_direction);
3422
3423         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3424                         "9084 Cannot setup S/G List for HBA"
3425                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3426                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3427                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3428                         prot_group_type, num_sge);
3429
3430         lpfc_cmd->seg_cnt = 0;
3431         lpfc_cmd->prot_seg_cnt = 0;
3432         return ret;
3433 }
3434
3435 /**
3436  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3437  * @phba: The Hba for which this call is being executed.
3438  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3439  *
3440  * This routine wraps the actual DMA mapping function pointer from the
3441  * lpfc_hba struct.
3442  *
3443  * Return codes:
3444  *      1 - Error
3445  *      0 - Success
3446  **/
3447 static inline int
3448 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3449 {
3450         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3451 }
3452
3453 /**
3454  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3455  * using BlockGuard.
3456  * @phba: The Hba for which this call is being executed.
3457  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3458  *
3459  * This routine wraps the actual DMA mapping function pointer from the
3460  * lpfc_hba struct.
3461  *
3462  * Return codes:
3463  *      1 - Error
3464  *      0 - Success
3465  **/
3466 static inline int
3467 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3468 {
3469         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3470 }
3471
3472 /**
3473  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3474  * @phba: Pointer to hba context object.
3475  * @vport: Pointer to vport object.
3476  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3477  * @rsp_iocb: Pointer to response iocb object which reported error.
3478  *
3479  * This function posts an event when there is a SCSI command reporting
3480  * error from the scsi device.
3481  **/
3482 static void
3483 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3484                 struct lpfc_io_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3485         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3486         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3487         uint32_t resp_info = fcprsp->rspStatus2;
3488         uint32_t scsi_status = fcprsp->rspStatus3;
3489         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3490         struct lpfc_fast_path_event *fast_path_evt = NULL;
3491         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3492         unsigned long flags;
3493
3494         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3495                 return;
3496
3497         /* If there is queuefull or busy condition send a scsi event */
3498         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3499                 (cmnd->result == SAM_STAT_BUSY)) {
3500                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3501                 if (!fast_path_evt)
3502                         return;
3503                 fast_path_evt->un.scsi_evt.event_type =
3504                         FC_REG_SCSI_EVENT;
3505                 fast_path_evt->un.scsi_evt.subcategory =
3506                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3507                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3508                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3509                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3510                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3511                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3512                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3513         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3514                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3515                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3516                 if (!fast_path_evt)
3517                         return;
3518                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3519                         FC_REG_SCSI_EVENT;
3520                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3521                         LPFC_EVENT_CHECK_COND;
3522                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3523                         cmnd->device->lun;
3524                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3525                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3526                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3527                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3528                 fast_path_evt->un.check_cond_evt.sense_key =
3529                         cmnd->sense_buffer[2] & 0xf;
3530                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3531                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3532         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3533                      fcpi_parm &&
3534                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3535                         ((scsi_status == SAM_STAT_GOOD) &&
3536                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3537                 /*
3538                  * If status is good or resid does not match with fcp_param and
3539                  * there is valid fcpi_parm, then there is a read_check error
3540                  */
3541                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3542                 if (!fast_path_evt)
3543                         return;
3544                 fast_path_evt->un.read_check_error.header.event_type =
3545                         FC_REG_FABRIC_EVENT;
3546                 fast_path_evt->un.read_check_error.header.subcategory =
3547                         LPFC_EVENT_FCPRDCHKERR;
3548                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3549                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3550                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3551                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3552                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3553                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3554                 fast_path_evt->un.read_check_error.fcpiparam =
3555                         fcpi_parm;
3556         } else
3557                 return;
3558
3559         fast_path_evt->vport = vport;
3560         spin_lock_irqsave(&phba->hbalock, flags);
3561         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3562         spin_unlock_irqrestore(&phba->hbalock, flags);
3563         lpfc_worker_wake_up(phba);
3564         return;
3565 }
3566
3567 /**
3568  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3569  * @phba: The HBA for which this call is being executed.
3570  * @psb: The scsi buffer which is going to be un-mapped.
3571  *
3572  * This routine does DMA un-mapping of scatter gather list of scsi command
3573  * field of @lpfc_cmd for device with SLI-3 interface spec.
3574  **/
3575 static void
3576 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
3577 {
3578         /*
3579          * There are only two special cases to consider.  (1) the scsi command
3580          * requested scatter-gather usage or (2) the scsi command allocated
3581          * a request buffer, but did not request use_sg.  There is a third
3582          * case, but it does not require resource deallocation.
3583          */
3584         if (psb->seg_cnt > 0)
3585                 scsi_dma_unmap(psb->pCmd);
3586         if (psb->prot_seg_cnt > 0)
3587                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3588                                 scsi_prot_sg_count(psb->pCmd),
3589                                 psb->pCmd->sc_data_direction);
3590 }
3591
3592 /**
3593  * lpfc_handler_fcp_err - FCP response handler
3594  * @vport: The virtual port for which this call is being executed.
3595  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
3596  * @rsp_iocb: The response IOCB which contains FCP error.
3597  *
3598  * This routine is called to process response IOCB with status field
3599  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3600  * based upon SCSI and FCP error.
3601  **/
3602 static void
3603 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
3604                     struct lpfc_iocbq *rsp_iocb)
3605 {
3606         struct lpfc_hba *phba = vport->phba;
3607         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3608         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3609         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3610         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3611         uint32_t resp_info = fcprsp->rspStatus2;
3612         uint32_t scsi_status = fcprsp->rspStatus3;
3613         uint32_t *lp;
3614         uint32_t host_status = DID_OK;
3615         uint32_t rsplen = 0;
3616         uint32_t fcpDl;
3617         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3618
3619
3620         /*
3621          *  If this is a task management command, there is no
3622          *  scsi packet associated with this lpfc_cmd.  The driver
3623          *  consumes it.
3624          */
3625         if (fcpcmd->fcpCntl2) {
3626                 scsi_status = 0;
3627                 goto out;
3628         }
3629
3630         if (resp_info & RSP_LEN_VALID) {
3631                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3632                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3633                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3634                                  "2719 Invalid response length: "
3635                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3636                                  cmnd->device->id,
3637                                  cmnd->device->lun, cmnd->cmnd[0],
3638                                  rsplen);
3639                         host_status = DID_ERROR;
3640                         goto out;
3641                 }
3642                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3643                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3644                                  "2757 Protocol failure detected during "
3645                                  "processing of FCP I/O op: "
3646                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3647                                  cmnd->device->id,
3648                                  cmnd->device->lun, cmnd->cmnd[0],
3649                                  fcprsp->rspInfo3);
3650                         host_status = DID_ERROR;
3651                         goto out;
3652                 }
3653         }
3654
3655         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3656                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3657                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3658                         snslen = SCSI_SENSE_BUFFERSIZE;
3659
3660                 if (resp_info & RSP_LEN_VALID)
3661                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3662                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3663         }
3664         lp = (uint32_t *)cmnd->sense_buffer;
3665
3666         /* special handling for under run conditions */
3667         if (!scsi_status && (resp_info & RESID_UNDER)) {
3668                 /* don't log under runs if fcp set... */
3669                 if (vport->cfg_log_verbose & LOG_FCP)
3670                         logit = LOG_FCP_ERROR;
3671                 /* unless operator says so */
3672                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3673                         logit = LOG_FCP_UNDER;
3674         }
3675
3676         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3677                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3678                          "Data: x%x x%x x%x x%x x%x\n",
3679                          cmnd->cmnd[0], scsi_status,
3680                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3681                          be32_to_cpu(fcprsp->rspResId),
3682                          be32_to_cpu(fcprsp->rspSnsLen),
3683                          be32_to_cpu(fcprsp->rspRspLen),
3684                          fcprsp->rspInfo3);
3685
3686         scsi_set_resid(cmnd, 0);
3687         fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3688         if (resp_info & RESID_UNDER) {
3689                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3690
3691                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3692                                  "9025 FCP Underrun, expected %d, "
3693                                  "residual %d Data: x%x x%x x%x\n",
3694                                  fcpDl,
3695                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3696                                  cmnd->underflow);
3697
3698                 /*
3699                  * If there is an under run, check if under run reported by
3700                  * storage array is same as the under run reported by HBA.
3701                  * If this is not same, there is a dropped frame.
3702                  */
3703                 if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3704                         lpfc_printf_vlog(vport, KERN_WARNING,
3705                                          LOG_FCP | LOG_FCP_ERROR,
3706                                          "9026 FCP Read Check Error "
3707                                          "and Underrun Data: x%x x%x x%x x%x\n",
3708                                          fcpDl,
3709                                          scsi_get_resid(cmnd), fcpi_parm,
3710                                          cmnd->cmnd[0]);
3711                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3712                         host_status = DID_ERROR;
3713                 }
3714                 /*
3715                  * The cmnd->underflow is the minimum number of bytes that must
3716                  * be transferred for this command.  Provided a sense condition
3717                  * is not present, make sure the actual amount transferred is at
3718                  * least the underflow value or fail.
3719                  */
3720                 if (!(resp_info & SNS_LEN_VALID) &&
3721                     (scsi_status == SAM_STAT_GOOD) &&
3722                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3723                      < cmnd->underflow)) {
3724                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3725                                          "9027 FCP command x%x residual "
3726                                          "underrun converted to error "
3727                                          "Data: x%x x%x x%x\n",
3728                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3729                                          scsi_get_resid(cmnd), cmnd->underflow);
3730                         host_status = DID_ERROR;
3731                 }
3732         } else if (resp_info & RESID_OVER) {
3733                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3734                                  "9028 FCP command x%x residual overrun error. "
3735                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3736                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3737                 host_status = DID_ERROR;
3738
3739         /*
3740          * Check SLI validation that all the transfer was actually done
3741          * (fcpi_parm should be zero). Apply check only to reads.
3742          */
3743         } else if (fcpi_parm) {
3744                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3745                                  "9029 FCP %s Check Error xri x%x  Data: "
3746                                  "x%x x%x x%x x%x x%x\n",
3747                                  ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
3748                                  "Read" : "Write"),
3749                                  ((phba->sli_rev == LPFC_SLI_REV4) ?
3750                                  lpfc_cmd->cur_iocbq.sli4_xritag :
3751                                  rsp_iocb->iocb.ulpContext),
3752                                  fcpDl, be32_to_cpu(fcprsp->rspResId),
3753                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3754
3755                 /* There is some issue with the LPe12000 that causes it
3756                  * to miscalculate the fcpi_parm and falsely trip this
3757                  * recovery logic.  Detect this case and don't error when true.
3758                  */
3759                 if (fcpi_parm > fcpDl)
3760                         goto out;
3761
3762                 switch (scsi_status) {
3763                 case SAM_STAT_GOOD:
3764                 case SAM_STAT_CHECK_CONDITION:
3765                         /* Fabric dropped a data frame. Fail any successful
3766                          * command in which we detected dropped frames.
3767                          * A status of good or some check conditions could
3768                          * be considered a successful command.
3769                          */
3770                         host_status = DID_ERROR;
3771                         break;
3772                 }
3773                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3774         }
3775
3776  out:
3777         cmnd->result = host_status << 16 | scsi_status;
3778         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3779 }
3780
3781 /**
3782  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3783  * @phba: The Hba for which this call is being executed.
3784  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3785  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3786  *
3787  * This routine assigns scsi command result by looking into response IOCB
3788  * status field appropriately. This routine handles QUEUE FULL condition as
3789  * well by ramping down device queue depth.
3790  **/
3791 static void
3792 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3793                         struct lpfc_iocbq *pIocbOut)
3794 {
3795         struct lpfc_io_buf *lpfc_cmd =
3796                 (struct lpfc_io_buf *) pIocbIn->context1;
3797         struct lpfc_vport      *vport = pIocbIn->vport;
3798         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3799         struct lpfc_nodelist *pnode = rdata->pnode;
3800         struct scsi_cmnd *cmd;
3801         unsigned long flags;
3802         struct lpfc_fast_path_event *fast_path_evt;
3803         struct Scsi_Host *shost;
3804         int idx;
3805         uint32_t logit = LOG_FCP;
3806 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3807         int cpu;
3808 #endif
3809
3810         /* Guard against abort handler being called at same time */
3811         spin_lock(&lpfc_cmd->buf_lock);
3812
3813         /* Sanity check on return of outstanding command */
3814         cmd = lpfc_cmd->pCmd;
3815         if (!cmd || !phba) {
3816                 lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
3817                                  "2621 IO completion: Not an active IO\n");
3818                 spin_unlock(&lpfc_cmd->buf_lock);
3819                 return;
3820         }
3821
3822         idx = lpfc_cmd->cur_iocbq.hba_wqidx;
3823         if (phba->sli4_hba.hdwq)
3824                 phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
3825
3826 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3827         if (unlikely(phba->cpucheck_on & LPFC_CHECK_SCSI_IO)) {
3828                 cpu = raw_smp_processor_id();
3829                 if (cpu < LPFC_CHECK_CPU_CNT && phba->sli4_hba.hdwq)
3830                         phba->sli4_hba.hdwq[idx].cpucheck_cmpl_io[cpu]++;
3831         }
3832 #endif
3833         shost = cmd->device->host;
3834
3835         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3836         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3837         /* pick up SLI4 exhange busy status from HBA */
3838         if (pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY)
3839                 lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
3840         else
3841                 lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
3842
3843 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3844         if (lpfc_cmd->prot_data_type) {
3845                 struct scsi_dif_tuple *src = NULL;
3846
3847                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3848                 /*
3849                  * Used to restore any changes to protection
3850                  * data for error injection.
3851                  */
3852                 switch (lpfc_cmd->prot_data_type) {
3853                 case LPFC_INJERR_REFTAG:
3854                         src->ref_tag =
3855                                 lpfc_cmd->prot_data;
3856                         break;
3857                 case LPFC_INJERR_APPTAG:
3858                         src->app_tag =
3859                                 (uint16_t)lpfc_cmd->prot_data;
3860                         break;
3861                 case LPFC_INJERR_GUARD:
3862                         src->guard_tag =
3863                                 (uint16_t)lpfc_cmd->prot_data;
3864                         break;
3865                 default:
3866                         break;
3867                 }
3868
3869                 lpfc_cmd->prot_data = 0;
3870                 lpfc_cmd->prot_data_type = 0;
3871                 lpfc_cmd->prot_data_segment = NULL;
3872         }
3873 #endif
3874
3875         if (unlikely(lpfc_cmd->status)) {
3876                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3877                     (lpfc_cmd->result & IOERR_DRVR_MASK))
3878                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3879                 else if (lpfc_cmd->status >= IOSTAT_CNT)
3880                         lpfc_cmd->status = IOSTAT_DEFAULT;
3881                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3882                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
3883                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3884                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3885                         logit = 0;
3886                 else
3887                         logit = LOG_FCP | LOG_FCP_UNDER;
3888                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3889                          "9030 FCP cmd x%x failed <%d/%lld> "
3890                          "status: x%x result: x%x "
3891                          "sid: x%x did: x%x oxid: x%x "
3892                          "Data: x%x x%x\n",
3893                          cmd->cmnd[0],
3894                          cmd->device ? cmd->device->id : 0xffff,
3895                          cmd->device ? cmd->device->lun : 0xffff,
3896                          lpfc_cmd->status, lpfc_cmd->result,
3897                          vport->fc_myDID,
3898                          (pnode) ? pnode->nlp_DID : 0,
3899                          phba->sli_rev == LPFC_SLI_REV4 ?
3900                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
3901                          pIocbOut->iocb.ulpContext,
3902                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
3903
3904                 switch (lpfc_cmd->status) {
3905                 case IOSTAT_FCP_RSP_ERROR:
3906                         /* Call FCP RSP handler to determine result */
3907                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
3908                         break;
3909                 case IOSTAT_NPORT_BSY:
3910                 case IOSTAT_FABRIC_BSY:
3911                         cmd->result = DID_TRANSPORT_DISRUPTED << 16;
3912                         fast_path_evt = lpfc_alloc_fast_evt(phba);
3913                         if (!fast_path_evt)
3914                                 break;
3915                         fast_path_evt->un.fabric_evt.event_type =
3916                                 FC_REG_FABRIC_EVENT;
3917                         fast_path_evt->un.fabric_evt.subcategory =
3918                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
3919                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
3920                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
3921                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
3922                                         &pnode->nlp_portname,
3923                                         sizeof(struct lpfc_name));
3924                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
3925                                         &pnode->nlp_nodename,
3926                                         sizeof(struct lpfc_name));
3927                         }
3928                         fast_path_evt->vport = vport;
3929                         fast_path_evt->work_evt.evt =
3930                                 LPFC_EVT_FASTPATH_MGMT_EVT;
3931                         spin_lock_irqsave(&phba->hbalock, flags);
3932                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
3933                                 &phba->work_list);
3934                         spin_unlock_irqrestore(&phba->hbalock, flags);
3935                         lpfc_worker_wake_up(phba);
3936                         break;
3937                 case IOSTAT_LOCAL_REJECT:
3938                 case IOSTAT_REMOTE_STOP:
3939                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
3940                             lpfc_cmd->result ==
3941                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
3942                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
3943                             lpfc_cmd->result ==
3944                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
3945                                 cmd->result = DID_NO_CONNECT << 16;
3946                                 break;
3947                         }
3948                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
3949                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
3950                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
3951                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
3952                                 cmd->result = DID_REQUEUE << 16;
3953                                 break;
3954                         }
3955                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
3956                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
3957                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
3958                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
3959                                         /*
3960                                          * This is a response for a BG enabled
3961                                          * cmd. Parse BG error
3962                                          */
3963                                         lpfc_parse_bg_err(phba, lpfc_cmd,
3964                                                         pIocbOut);
3965                                         break;
3966                                 } else {
3967                                         lpfc_printf_vlog(vport, KERN_WARNING,
3968                                                         LOG_BG,
3969                                                         "9031 non-zero BGSTAT "
3970                                                         "on unprotected cmd\n");
3971                                 }
3972                         }
3973                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
3974                                 && (phba->sli_rev == LPFC_SLI_REV4)
3975                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
3976                                 /* This IO was aborted by the target, we don't
3977                                  * know the rxid and because we did not send the
3978                                  * ABTS we cannot generate and RRQ.
3979                                  */
3980                                 lpfc_set_rrq_active(phba, pnode,
3981                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
3982                                         0, 0);
3983                         }
3984                         /* fall through */
3985                 default:
3986                         cmd->result = DID_ERROR << 16;
3987                         break;
3988                 }
3989
3990                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
3991                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
3992                         cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
3993                                       SAM_STAT_BUSY;
3994         } else
3995                 cmd->result = DID_OK << 16;
3996
3997         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
3998                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
3999
4000                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4001                                  "0710 Iodone <%d/%llu> cmd x%px, error "
4002                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4003                                  cmd->device->id, cmd->device->lun, cmd,
4004                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4005                                  scsi_get_resid(cmd));
4006         }
4007
4008         lpfc_update_stats(vport, lpfc_cmd);
4009         if (vport->cfg_max_scsicmpl_time &&
4010            time_after(jiffies, lpfc_cmd->start_time +
4011                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4012                 spin_lock_irqsave(shost->host_lock, flags);
4013                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4014                         if (pnode->cmd_qdepth >
4015                                 atomic_read(&pnode->cmd_pending) &&
4016                                 (atomic_read(&pnode->cmd_pending) >
4017                                 LPFC_MIN_TGT_QDEPTH) &&
4018                                 ((cmd->cmnd[0] == READ_10) ||
4019                                 (cmd->cmnd[0] == WRITE_10)))
4020                                 pnode->cmd_qdepth =
4021                                         atomic_read(&pnode->cmd_pending);
4022
4023                         pnode->last_change_time = jiffies;
4024                 }
4025                 spin_unlock_irqrestore(shost->host_lock, flags);
4026         }
4027         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4028
4029         lpfc_cmd->pCmd = NULL;
4030         spin_unlock(&lpfc_cmd->buf_lock);
4031
4032         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4033         cmd->scsi_done(cmd);
4034
4035         /*
4036          * If there is an abort thread waiting for command completion
4037          * wake up the thread.
4038          */
4039         spin_lock(&lpfc_cmd->buf_lock);
4040         lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
4041         if (lpfc_cmd->waitq)
4042                 wake_up(lpfc_cmd->waitq);
4043         spin_unlock(&lpfc_cmd->buf_lock);
4044
4045         lpfc_release_scsi_buf(phba, lpfc_cmd);
4046 }
4047
4048 /**
4049  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4050  * @data: A pointer to the immediate command data portion of the IOCB.
4051  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4052  *
4053  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4054  * byte swapping the data to big endian format for transmission on the wire.
4055  **/
4056 static void
4057 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4058 {
4059         int i, j;
4060         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4061              i += sizeof(uint32_t), j++) {
4062                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4063         }
4064 }
4065
4066 /**
4067  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4068  * @vport: The virtual port for which this call is being executed.
4069  * @lpfc_cmd: The scsi command which needs to send.
4070  * @pnode: Pointer to lpfc_nodelist.
4071  *
4072  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4073  * to transfer for device with SLI3 interface spec.
4074  **/
4075 static void
4076 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
4077                     struct lpfc_nodelist *pnode)
4078 {
4079         struct lpfc_hba *phba = vport->phba;
4080         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4081         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4082         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4083         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4084         struct lpfc_sli4_hdw_queue *hdwq = NULL;
4085         int datadir = scsi_cmnd->sc_data_direction;
4086         int idx;
4087         uint8_t *ptr;
4088         bool sli4;
4089         uint32_t fcpdl;
4090
4091         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4092                 return;
4093
4094         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4095         /* clear task management bits */
4096         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4097
4098         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4099                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4100
4101         ptr = &fcp_cmnd->fcpCdb[0];
4102         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4103         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4104                 ptr += scsi_cmnd->cmd_len;
4105                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4106         }
4107
4108         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4109
4110         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4111         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4112         idx = lpfc_cmd->hdwq_no;
4113         if (phba->sli4_hba.hdwq)
4114                 hdwq = &phba->sli4_hba.hdwq[idx];
4115
4116         /*
4117          * There are three possibilities here - use scatter-gather segment, use
4118          * the single mapping, or neither.  Start the lpfc command prep by
4119          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4120          * data bde entry.
4121          */
4122         if (scsi_sg_count(scsi_cmnd)) {
4123                 if (datadir == DMA_TO_DEVICE) {
4124                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4125                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4126                         if (vport->cfg_first_burst_size &&
4127                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4128                                 fcpdl = scsi_bufflen(scsi_cmnd);
4129                                 if (fcpdl < vport->cfg_first_burst_size)
4130                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4131                                 else
4132                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4133                                                 vport->cfg_first_burst_size;
4134                         }
4135                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4136                         if (hdwq)
4137                                 hdwq->scsi_cstat.output_requests++;
4138                 } else {
4139                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4140                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4141                         fcp_cmnd->fcpCntl3 = READ_DATA;
4142                         if (hdwq)
4143                                 hdwq->scsi_cstat.input_requests++;
4144                 }
4145         } else {
4146                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4147                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4148                 iocb_cmd->ulpPU = 0;
4149                 fcp_cmnd->fcpCntl3 = 0;
4150                 if (hdwq)
4151                         hdwq->scsi_cstat.control_requests++;
4152         }
4153         if (phba->sli_rev == 3 &&
4154             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4155                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4156         /*
4157          * Finish initializing those IOCB fields that are independent
4158          * of the scsi_cmnd request_buffer
4159          */
4160         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4161         if (sli4)
4162                 piocbq->iocb.ulpContext =
4163                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4164         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4165                 piocbq->iocb.ulpFCP2Rcvy = 1;
4166         else
4167                 piocbq->iocb.ulpFCP2Rcvy = 0;
4168
4169         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4170         piocbq->context1  = lpfc_cmd;
4171         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4172         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4173         piocbq->vport = vport;
4174 }
4175
4176 /**
4177  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4178  * @vport: The virtual port for which this call is being executed.
4179  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
4180  * @lun: Logical unit number.
4181  * @task_mgmt_cmd: SCSI task management command.
4182  *
4183  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4184  * for device with SLI-3 interface spec.
4185  *
4186  * Return codes:
4187  *   0 - Error
4188  *   1 - Success
4189  **/
4190 static int
4191 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4192                              struct lpfc_io_buf *lpfc_cmd,
4193                              uint64_t lun,
4194                              uint8_t task_mgmt_cmd)
4195 {
4196         struct lpfc_iocbq *piocbq;
4197         IOCB_t *piocb;
4198         struct fcp_cmnd *fcp_cmnd;
4199         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4200         struct lpfc_nodelist *ndlp = rdata->pnode;
4201
4202         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4203             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4204                 return 0;
4205
4206         piocbq = &(lpfc_cmd->cur_iocbq);
4207         piocbq->vport = vport;
4208
4209         piocb = &piocbq->iocb;
4210
4211         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4212         /* Clear out any old data in the FCP command area */
4213         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4214         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4215         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4216         if (vport->phba->sli_rev == 3 &&
4217             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4218                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4219         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4220         piocb->ulpContext = ndlp->nlp_rpi;
4221         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4222                 piocb->ulpContext =
4223                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4224         }
4225         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4226         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4227         piocb->ulpPU = 0;
4228         piocb->un.fcpi.fcpi_parm = 0;
4229
4230         /* ulpTimeout is only one byte */
4231         if (lpfc_cmd->timeout > 0xff) {
4232                 /*
4233                  * Do not timeout the command at the firmware level.
4234                  * The driver will provide the timeout mechanism.
4235                  */
4236                 piocb->ulpTimeout = 0;
4237         } else
4238                 piocb->ulpTimeout = lpfc_cmd->timeout;
4239
4240         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4241                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4242
4243         return 1;
4244 }
4245
4246 /**
4247  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4248  * @phba: The hba struct for which this call is being executed.
4249  * @dev_grp: The HBA PCI-Device group number.
4250  *
4251  * This routine sets up the SCSI interface API function jump table in @phba
4252  * struct.
4253  * Returns: 0 - success, -ENODEV - failure.
4254  **/
4255 int
4256 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4257 {
4258
4259         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4260         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4261
4262         switch (dev_grp) {
4263         case LPFC_PCI_DEV_LP:
4264                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4265                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4266                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4267                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4268                 break;
4269         case LPFC_PCI_DEV_OC:
4270                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4271                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4272                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4273                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4274                 break;
4275         default:
4276                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4277                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4278                                 dev_grp);
4279                 return -ENODEV;
4280                 break;
4281         }
4282         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4283         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4284         return 0;
4285 }
4286
4287 /**
4288  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4289  * @phba: The Hba for which this call is being executed.
4290  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4291  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4292  *
4293  * This routine is IOCB completion routine for device reset and target reset
4294  * routine. This routine release scsi buffer associated with lpfc_cmd.
4295  **/
4296 static void
4297 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4298                         struct lpfc_iocbq *cmdiocbq,
4299                         struct lpfc_iocbq *rspiocbq)
4300 {
4301         struct lpfc_io_buf *lpfc_cmd =
4302                 (struct lpfc_io_buf *) cmdiocbq->context1;
4303         if (lpfc_cmd)
4304                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4305         return;
4306 }
4307
4308 /**
4309  * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
4310  *                             if issuing a pci_bus_reset is possibly unsafe
4311  * @phba: lpfc_hba pointer.
4312  *
4313  * Description:
4314  * Walks the bus_list to ensure only PCI devices with Emulex
4315  * vendor id, device ids that support hot reset, and only one occurrence
4316  * of function 0.
4317  *
4318  * Returns:
4319  * -EBADSLT,  detected invalid device
4320  *      0,    successful
4321  */
4322 int
4323 lpfc_check_pci_resettable(const struct lpfc_hba *phba)
4324 {
4325         const struct pci_dev *pdev = phba->pcidev;
4326         struct pci_dev *ptr = NULL;
4327         u8 counter = 0;
4328
4329         /* Walk the list of devices on the pci_dev's bus */
4330         list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
4331                 /* Check for Emulex Vendor ID */
4332                 if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
4333                         lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4334                                         "8346 Non-Emulex vendor found: "
4335                                         "0x%04x\n", ptr->vendor);
4336                         return -EBADSLT;
4337                 }
4338
4339                 /* Check for valid Emulex Device ID */
4340                 switch (ptr->device) {
4341                 case PCI_DEVICE_ID_LANCER_FC:
4342                 case PCI_DEVICE_ID_LANCER_G6_FC:
4343                 case PCI_DEVICE_ID_LANCER_G7_FC:
4344                         break;
4345                 default:
4346                         lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4347                                         "8347 Invalid device found: "
4348                                         "0x%04x\n", ptr->device);
4349                         return -EBADSLT;
4350                 }
4351
4352                 /* Check for only one function 0 ID to ensure only one HBA on
4353                  * secondary bus
4354                  */
4355                 if (ptr->devfn == 0) {
4356                         if (++counter > 1) {
4357                                 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
4358                                                 "8348 More than one device on "
4359                                                 "secondary bus found\n");
4360                                 return -EBADSLT;
4361                         }
4362                 }
4363         }
4364
4365         return 0;
4366 }
4367
4368 /**
4369  * lpfc_info - Info entry point of scsi_host_template data structure
4370  * @host: The scsi host for which this call is being executed.
4371  *
4372  * This routine provides module information about hba.
4373  *
4374  * Reutrn code:
4375  *   Pointer to char - Success.
4376  **/
4377 const char *
4378 lpfc_info(struct Scsi_Host *host)
4379 {
4380         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4381         struct lpfc_hba   *phba = vport->phba;
4382         int link_speed = 0;
4383         static char lpfcinfobuf[384];
4384         char tmp[384] = {0};
4385
4386         memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
4387         if (phba && phba->pcidev){
4388                 /* Model Description */
4389                 scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
4390                 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4391                     sizeof(lpfcinfobuf))
4392                         goto buffer_done;
4393
4394                 /* PCI Info */
4395                 scnprintf(tmp, sizeof(tmp),
4396                           " on PCI bus %02x device %02x irq %d",
4397                           phba->pcidev->bus->number, phba->pcidev->devfn,
4398                           phba->pcidev->irq);
4399                 if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4400                     sizeof(lpfcinfobuf))
4401                         goto buffer_done;
4402
4403                 /* Port Number */
4404                 if (phba->Port[0]) {
4405                         scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
4406                         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4407                             sizeof(lpfcinfobuf))
4408                                 goto buffer_done;
4409                 }
4410
4411                 /* Link Speed */
4412                 link_speed = lpfc_sli_port_speed_get(phba);
4413                 if (link_speed != 0) {
4414                         scnprintf(tmp, sizeof(tmp),
4415                                   " Logical Link Speed: %d Mbps", link_speed);
4416                         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
4417                             sizeof(lpfcinfobuf))
4418                                 goto buffer_done;
4419                 }
4420
4421                 /* PCI resettable */
4422                 if (!lpfc_check_pci_resettable(phba)) {
4423                         scnprintf(tmp, sizeof(tmp), " PCI resettable");
4424                         strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
4425                 }
4426         }
4427
4428 buffer_done:
4429         return lpfcinfobuf;
4430 }
4431
4432 /**
4433  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4434  * @phba: The Hba for which this call is being executed.
4435  *
4436  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4437  * The default value of cfg_poll_tmo is 10 milliseconds.
4438  **/
4439 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4440 {
4441         unsigned long  poll_tmo_expires =
4442                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4443
4444         if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4445                 mod_timer(&phba->fcp_poll_timer,
4446                           poll_tmo_expires);
4447 }
4448
4449 /**
4450  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4451  * @phba: The Hba for which this call is being executed.
4452  *
4453  * This routine starts the fcp_poll_timer of @phba.
4454  **/
4455 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4456 {
4457         lpfc_poll_rearm_timer(phba);
4458 }
4459
4460 /**
4461  * lpfc_poll_timeout - Restart polling timer
4462  * @ptr: Map to lpfc_hba data structure pointer.
4463  *
4464  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4465  * and FCP Ring interrupt is disable.
4466  **/
4467
4468 void lpfc_poll_timeout(struct timer_list *t)
4469 {
4470         struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4471
4472         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4473                 lpfc_sli_handle_fast_ring_event(phba,
4474                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4475
4476                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4477                         lpfc_poll_rearm_timer(phba);
4478         }
4479 }
4480
4481 /**
4482  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4483  * @cmnd: Pointer to scsi_cmnd data structure.
4484  * @done: Pointer to done routine.
4485  *
4486  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4487  * This routine prepares an IOCB from scsi command and provides to firmware.
4488  * The @done callback is invoked after driver finished processing the command.
4489  *
4490  * Return value :
4491  *   0 - Success
4492  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4493  **/
4494 static int
4495 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4496 {
4497         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4498         struct lpfc_hba   *phba = vport->phba;
4499         struct lpfc_rport_data *rdata;
4500         struct lpfc_nodelist *ndlp;
4501         struct lpfc_io_buf *lpfc_cmd;
4502         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4503         int err, idx;
4504 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4505         int cpu;
4506 #endif
4507
4508         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4509
4510         /* sanity check on references */
4511         if (unlikely(!rdata) || unlikely(!rport))
4512                 goto out_fail_command;
4513
4514         err = fc_remote_port_chkready(rport);
4515         if (err) {
4516                 cmnd->result = err;
4517                 goto out_fail_command;
4518         }
4519         ndlp = rdata->pnode;
4520
4521         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4522                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4523
4524                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4525                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4526                                 " op:%02x str=%s without registering for"
4527                                 " BlockGuard - Rejecting command\n",
4528                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4529                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4530                 goto out_fail_command;
4531         }
4532
4533         /*
4534          * Catch race where our node has transitioned, but the
4535          * transport is still transitioning.
4536          */
4537         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4538                 goto out_tgt_busy;
4539         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
4540                 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
4541                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4542                                          "3377 Target Queue Full, scsi Id:%d "
4543                                          "Qdepth:%d Pending command:%d"
4544                                          " WWNN:%02x:%02x:%02x:%02x:"
4545                                          "%02x:%02x:%02x:%02x, "
4546                                          " WWPN:%02x:%02x:%02x:%02x:"
4547                                          "%02x:%02x:%02x:%02x",
4548                                          ndlp->nlp_sid, ndlp->cmd_qdepth,
4549                                          atomic_read(&ndlp->cmd_pending),
4550                                          ndlp->nlp_nodename.u.wwn[0],
4551                                          ndlp->nlp_nodename.u.wwn[1],
4552                                          ndlp->nlp_nodename.u.wwn[2],
4553                                          ndlp->nlp_nodename.u.wwn[3],
4554                                          ndlp->nlp_nodename.u.wwn[4],
4555                                          ndlp->nlp_nodename.u.wwn[5],
4556                                          ndlp->nlp_nodename.u.wwn[6],
4557                                          ndlp->nlp_nodename.u.wwn[7],
4558                                          ndlp->nlp_portname.u.wwn[0],
4559                                          ndlp->nlp_portname.u.wwn[1],
4560                                          ndlp->nlp_portname.u.wwn[2],
4561                                          ndlp->nlp_portname.u.wwn[3],
4562                                          ndlp->nlp_portname.u.wwn[4],
4563                                          ndlp->nlp_portname.u.wwn[5],
4564                                          ndlp->nlp_portname.u.wwn[6],
4565                                          ndlp->nlp_portname.u.wwn[7]);
4566                         goto out_tgt_busy;
4567                 }
4568         }
4569
4570         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd);
4571         if (lpfc_cmd == NULL) {
4572                 lpfc_rampdown_queue_depth(phba);
4573
4574                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4575                                  "0707 driver's buffer pool is empty, "
4576                                  "IO busied\n");
4577                 goto out_host_busy;
4578         }
4579
4580         /*
4581          * Store the midlayer's command structure for the completion phase
4582          * and complete the command initialization.
4583          */
4584         lpfc_cmd->pCmd  = cmnd;
4585         lpfc_cmd->rdata = rdata;
4586         lpfc_cmd->ndlp = ndlp;
4587         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4588
4589         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4590                 if (vport->phba->cfg_enable_bg) {
4591                         lpfc_printf_vlog(vport,
4592                                          KERN_INFO, LOG_SCSI_CMD,
4593                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4594                                          "sector x%llx cnt %u pt %x\n",
4595                                          dif_op_str[scsi_get_prot_op(cmnd)],
4596                                          cmnd->cmnd[0],
4597                                          (unsigned long long)scsi_get_lba(cmnd),
4598                                          blk_rq_sectors(cmnd->request),
4599                                          (cmnd->cmnd[1]>>5));
4600                 }
4601                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4602         } else {
4603                 if (vport->phba->cfg_enable_bg) {
4604                         lpfc_printf_vlog(vport,
4605                                          KERN_INFO, LOG_SCSI_CMD,
4606                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4607                                          "x%x sector x%llx cnt %u pt %x\n",
4608                                          cmnd->cmnd[0],
4609                                          (unsigned long long)scsi_get_lba(cmnd),
4610                                          blk_rq_sectors(cmnd->request),
4611                                          (cmnd->cmnd[1]>>5));
4612                 }
4613                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4614         }
4615
4616         if (unlikely(err)) {
4617                 if (err == 2) {
4618                         cmnd->result = DID_ERROR << 16;
4619                         goto out_fail_command_release_buf;
4620                 }
4621                 goto out_host_busy_free_buf;
4622         }
4623
4624         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4625
4626 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4627         if (unlikely(phba->cpucheck_on & LPFC_CHECK_SCSI_IO)) {
4628                 cpu = raw_smp_processor_id();
4629                 if (cpu < LPFC_CHECK_CPU_CNT) {
4630                         struct lpfc_sli4_hdw_queue *hdwq =
4631                                         &phba->sli4_hba.hdwq[lpfc_cmd->hdwq_no];
4632                         hdwq->cpucheck_xmt_io[cpu]++;
4633                 }
4634         }
4635 #endif
4636         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4637                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4638         if (err) {
4639                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4640                                  "3376 FCP could not issue IOCB err %x"
4641                                  "FCP cmd x%x <%d/%llu> "
4642                                  "sid: x%x did: x%x oxid: x%x "
4643                                  "Data: x%x x%x x%x x%x\n",
4644                                  err, cmnd->cmnd[0],
4645                                  cmnd->device ? cmnd->device->id : 0xffff,
4646                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4647                                  vport->fc_myDID, ndlp->nlp_DID,
4648                                  phba->sli_rev == LPFC_SLI_REV4 ?
4649                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4650                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4651                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4652                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4653                                  (uint32_t)
4654                                  (cmnd->request->timeout / 1000));
4655
4656                 goto out_host_busy_free_buf;
4657         }
4658         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4659                 lpfc_sli_handle_fast_ring_event(phba,
4660                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4661
4662                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4663                         lpfc_poll_rearm_timer(phba);
4664         }
4665
4666         if (phba->cfg_xri_rebalancing)
4667                 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no);
4668
4669         return 0;
4670
4671  out_host_busy_free_buf:
4672         idx = lpfc_cmd->hdwq_no;
4673         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4674         if (phba->sli4_hba.hdwq) {
4675                 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
4676                 case WRITE_DATA:
4677                         phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--;
4678                         break;
4679                 case READ_DATA:
4680                         phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--;
4681                         break;
4682                 default:
4683                         phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--;
4684                 }
4685         }
4686         lpfc_release_scsi_buf(phba, lpfc_cmd);
4687  out_host_busy:
4688         return SCSI_MLQUEUE_HOST_BUSY;
4689
4690  out_tgt_busy:
4691         return SCSI_MLQUEUE_TARGET_BUSY;
4692
4693  out_fail_command_release_buf:
4694         lpfc_release_scsi_buf(phba, lpfc_cmd);
4695
4696  out_fail_command:
4697         cmnd->scsi_done(cmnd);
4698         return 0;
4699 }
4700
4701
4702 /**
4703  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4704  * @cmnd: Pointer to scsi_cmnd data structure.
4705  *
4706  * This routine aborts @cmnd pending in base driver.
4707  *
4708  * Return code :
4709  *   0x2003 - Error
4710  *   0x2002 - Success
4711  **/
4712 static int
4713 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4714 {
4715         struct Scsi_Host  *shost = cmnd->device->host;
4716         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4717         struct lpfc_hba   *phba = vport->phba;
4718         struct lpfc_iocbq *iocb;
4719         struct lpfc_iocbq *abtsiocb;
4720         struct lpfc_io_buf *lpfc_cmd;
4721         IOCB_t *cmd, *icmd;
4722         int ret = SUCCESS, status = 0;
4723         struct lpfc_sli_ring *pring_s4 = NULL;
4724         int ret_val;
4725         unsigned long flags;
4726         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4727
4728         status = fc_block_scsi_eh(cmnd);
4729         if (status != 0 && status != SUCCESS)
4730                 return status;
4731
4732         lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble;
4733         if (!lpfc_cmd)
4734                 return ret;
4735
4736         spin_lock_irqsave(&phba->hbalock, flags);
4737         /* driver queued commands are in process of being flushed */
4738         if (phba->hba_flag & HBA_IOQ_FLUSH) {
4739                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4740                         "3168 SCSI Layer abort requested I/O has been "
4741                         "flushed by LLD.\n");
4742                 ret = FAILED;
4743                 goto out_unlock;
4744         }
4745
4746         /* Guard against IO completion being called at same time */
4747         spin_lock(&lpfc_cmd->buf_lock);
4748
4749         if (!lpfc_cmd->pCmd) {
4750                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4751                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4752                          "x%x ID %d LUN %llu\n",
4753                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4754                 goto out_unlock_buf;
4755         }
4756
4757         iocb = &lpfc_cmd->cur_iocbq;
4758         if (phba->sli_rev == LPFC_SLI_REV4) {
4759                 pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
4760                 if (!pring_s4) {
4761                         ret = FAILED;
4762                         goto out_unlock_buf;
4763                 }
4764                 spin_lock(&pring_s4->ring_lock);
4765         }
4766         /* the command is in process of being cancelled */
4767         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4768                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4769                         "3169 SCSI Layer abort requested I/O has been "
4770                         "cancelled by LLD.\n");
4771                 ret = FAILED;
4772                 goto out_unlock_ring;
4773         }
4774         /*
4775          * If pCmd field of the corresponding lpfc_io_buf structure
4776          * points to a different SCSI command, then the driver has
4777          * already completed this command, but the midlayer did not
4778          * see the completion before the eh fired. Just return SUCCESS.
4779          */
4780         if (lpfc_cmd->pCmd != cmnd) {
4781                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4782                         "3170 SCSI Layer abort requested I/O has been "
4783                         "completed by LLD.\n");
4784                 goto out_unlock_ring;
4785         }
4786
4787         BUG_ON(iocb->context1 != lpfc_cmd);
4788
4789         /* abort issued in recovery is still in progress */
4790         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4791                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4792                          "3389 SCSI Layer I/O Abort Request is pending\n");
4793                 if (phba->sli_rev == LPFC_SLI_REV4)
4794                         spin_unlock(&pring_s4->ring_lock);
4795                 spin_unlock(&lpfc_cmd->buf_lock);
4796                 spin_unlock_irqrestore(&phba->hbalock, flags);
4797                 goto wait_for_cmpl;
4798         }
4799
4800         abtsiocb = __lpfc_sli_get_iocbq(phba);
4801         if (abtsiocb == NULL) {
4802                 ret = FAILED;
4803                 goto out_unlock_ring;
4804         }
4805
4806         /* Indicate the IO is being aborted by the driver. */
4807         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4808
4809         /*
4810          * The scsi command can not be in txq and it is in flight because the
4811          * pCmd is still pointig at the SCSI command we have to abort. There
4812          * is no need to search the txcmplq. Just send an abort to the FW.
4813          */
4814
4815         cmd = &iocb->iocb;
4816         icmd = &abtsiocb->iocb;
4817         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4818         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4819         if (phba->sli_rev == LPFC_SLI_REV4)
4820                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4821         else
4822                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4823
4824         icmd->ulpLe = 1;
4825         icmd->ulpClass = cmd->ulpClass;
4826
4827         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4828         abtsiocb->hba_wqidx = iocb->hba_wqidx;
4829         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4830         if (iocb->iocb_flag & LPFC_IO_FOF)
4831                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4832
4833         if (lpfc_is_link_up(phba))
4834                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4835         else
4836                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4837
4838         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4839         abtsiocb->vport = vport;
4840         lpfc_cmd->waitq = &waitq;
4841         if (phba->sli_rev == LPFC_SLI_REV4) {
4842                 /* Note: both hbalock and ring_lock must be set here */
4843                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4844                                                 abtsiocb, 0);
4845                 spin_unlock(&pring_s4->ring_lock);
4846         } else {
4847                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4848                                                 abtsiocb, 0);
4849         }
4850
4851         if (ret_val == IOCB_ERROR) {
4852                 /* Indicate the IO is not being aborted by the driver. */
4853                 iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
4854                 lpfc_cmd->waitq = NULL;
4855                 spin_unlock(&lpfc_cmd->buf_lock);
4856                 spin_unlock_irqrestore(&phba->hbalock, flags);
4857                 lpfc_sli_release_iocbq(phba, abtsiocb);
4858                 ret = FAILED;
4859                 goto out;
4860         }
4861
4862         /* no longer need the lock after this point */
4863         spin_unlock(&lpfc_cmd->buf_lock);
4864         spin_unlock_irqrestore(&phba->hbalock, flags);
4865
4866         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4867                 lpfc_sli_handle_fast_ring_event(phba,
4868                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4869
4870 wait_for_cmpl:
4871         /* Wait for abort to complete */
4872         wait_event_timeout(waitq,
4873                           (lpfc_cmd->pCmd != cmnd),
4874                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4875
4876         spin_lock(&lpfc_cmd->buf_lock);
4877
4878         if (lpfc_cmd->pCmd == cmnd) {
4879                 ret = FAILED;
4880                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4881                                  "0748 abort handler timed out waiting "
4882                                  "for aborting I/O (xri:x%x) to complete: "
4883                                  "ret %#x, ID %d, LUN %llu\n",
4884                                  iocb->sli4_xritag, ret,
4885                                  cmnd->device->id, cmnd->device->lun);
4886         }
4887
4888         lpfc_cmd->waitq = NULL;
4889
4890         spin_unlock(&lpfc_cmd->buf_lock);
4891         goto out;
4892
4893 out_unlock_ring:
4894         if (phba->sli_rev == LPFC_SLI_REV4)
4895                 spin_unlock(&pring_s4->ring_lock);
4896 out_unlock_buf:
4897         spin_unlock(&lpfc_cmd->buf_lock);
4898 out_unlock:
4899         spin_unlock_irqrestore(&phba->hbalock, flags);
4900 out:
4901         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4902                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4903                          "LUN %llu\n", ret, cmnd->device->id,
4904                          cmnd->device->lun);
4905         return ret;
4906 }
4907
4908 static char *
4909 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4910 {
4911         switch (task_mgmt_cmd) {
4912         case FCP_ABORT_TASK_SET:
4913                 return "ABORT_TASK_SET";
4914         case FCP_CLEAR_TASK_SET:
4915                 return "FCP_CLEAR_TASK_SET";
4916         case FCP_BUS_RESET:
4917                 return "FCP_BUS_RESET";
4918         case FCP_LUN_RESET:
4919                 return "FCP_LUN_RESET";
4920         case FCP_TARGET_RESET:
4921                 return "FCP_TARGET_RESET";
4922         case FCP_CLEAR_ACA:
4923                 return "FCP_CLEAR_ACA";
4924         case FCP_TERMINATE_TASK:
4925                 return "FCP_TERMINATE_TASK";
4926         default:
4927                 return "unknown";
4928         }
4929 }
4930
4931
4932 /**
4933  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4934  * @vport: The virtual port for which this call is being executed.
4935  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
4936  *
4937  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4938  *
4939  * Return code :
4940  *   0x2003 - Error
4941  *   0x2002 - Success
4942  **/
4943 static int
4944 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
4945 {
4946         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4947         uint32_t rsp_info;
4948         uint32_t rsp_len;
4949         uint8_t  rsp_info_code;
4950         int ret = FAILED;
4951
4952
4953         if (fcprsp == NULL)
4954                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4955                                  "0703 fcp_rsp is missing\n");
4956         else {
4957                 rsp_info = fcprsp->rspStatus2;
4958                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4959                 rsp_info_code = fcprsp->rspInfo3;
4960
4961
4962                 lpfc_printf_vlog(vport, KERN_INFO,
4963                                  LOG_FCP,
4964                                  "0706 fcp_rsp valid 0x%x,"
4965                                  " rsp len=%d code 0x%x\n",
4966                                  rsp_info,
4967                                  rsp_len, rsp_info_code);
4968
4969                 /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN
4970                  * field specifies the number of valid bytes of FCP_RSP_INFO.
4971                  * The FCP_RSP_LEN field shall be set to 0x04 or 0x08
4972                  */
4973                 if ((fcprsp->rspStatus2 & RSP_LEN_VALID) &&
4974                     ((rsp_len == 8) || (rsp_len == 4))) {
4975                         switch (rsp_info_code) {
4976                         case RSP_NO_FAILURE:
4977                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4978                                                  "0715 Task Mgmt No Failure\n");
4979                                 ret = SUCCESS;
4980                                 break;
4981                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4982                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4983                                                  "0716 Task Mgmt Target "
4984                                                 "reject\n");
4985                                 break;
4986                         case RSP_TM_NOT_COMPLETED: /* TM failed */
4987                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4988                                                  "0717 Task Mgmt Target "
4989                                                 "failed TM\n");
4990                                 break;
4991                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4992                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4993                                                  "0718 Task Mgmt to invalid "
4994                                                 "LUN\n");
4995                                 break;
4996                         }
4997                 }
4998         }
4999         return ret;
5000 }
5001
5002
5003 /**
5004  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5005  * @vport: The virtual port for which this call is being executed.
5006  * @rdata: Pointer to remote port local data
5007  * @tgt_id: Target ID of remote device.
5008  * @lun_id: Lun number for the TMF
5009  * @task_mgmt_cmd: type of TMF to send
5010  *
5011  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5012  * a remote port.
5013  *
5014  * Return Code:
5015  *   0x2003 - Error
5016  *   0x2002 - Success.
5017  **/
5018 static int
5019 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
5020                    unsigned int tgt_id, uint64_t lun_id,
5021                    uint8_t task_mgmt_cmd)
5022 {
5023         struct lpfc_hba   *phba = vport->phba;
5024         struct lpfc_io_buf *lpfc_cmd;
5025         struct lpfc_iocbq *iocbq;
5026         struct lpfc_iocbq *iocbqrsp;
5027         struct lpfc_rport_data *rdata;
5028         struct lpfc_nodelist *pnode;
5029         int ret;
5030         int status;
5031
5032         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5033         if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5034                 return FAILED;
5035         pnode = rdata->pnode;
5036
5037         lpfc_cmd = lpfc_get_scsi_buf(phba, pnode, NULL);
5038         if (lpfc_cmd == NULL)
5039                 return FAILED;
5040         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5041         lpfc_cmd->rdata = rdata;
5042         lpfc_cmd->pCmd = cmnd;
5043         lpfc_cmd->ndlp = pnode;
5044
5045         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5046                                            task_mgmt_cmd);
5047         if (!status) {
5048                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5049                 return FAILED;
5050         }
5051
5052         iocbq = &lpfc_cmd->cur_iocbq;
5053         iocbqrsp = lpfc_sli_get_iocbq(phba);
5054         if (iocbqrsp == NULL) {
5055                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5056                 return FAILED;
5057         }
5058         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5059
5060         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5061                          "0702 Issue %s to TGT %d LUN %llu "
5062                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5063                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5064                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5065                          iocbq->iocb_flag);
5066
5067         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5068                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5069         if ((status != IOCB_SUCCESS) ||
5070             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5071                 if (status != IOCB_SUCCESS ||
5072                     iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5073                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5074                                          "0727 TMF %s to TGT %d LUN %llu "
5075                                          "failed (%d, %d) iocb_flag x%x\n",
5076                                          lpfc_taskmgmt_name(task_mgmt_cmd),
5077                                          tgt_id, lun_id,
5078                                          iocbqrsp->iocb.ulpStatus,
5079                                          iocbqrsp->iocb.un.ulpWord[4],
5080                                          iocbq->iocb_flag);
5081                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5082                 if (status == IOCB_SUCCESS) {
5083                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5084                                 /* Something in the FCP_RSP was invalid.
5085                                  * Check conditions */
5086                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5087                         else
5088                                 ret = FAILED;
5089                 } else if (status == IOCB_TIMEDOUT) {
5090                         ret = TIMEOUT_ERROR;
5091                 } else {
5092                         ret = FAILED;
5093                 }
5094         } else
5095                 ret = SUCCESS;
5096
5097         lpfc_sli_release_iocbq(phba, iocbqrsp);
5098
5099         if (ret != TIMEOUT_ERROR)
5100                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5101
5102         return ret;
5103 }
5104
5105 /**
5106  * lpfc_chk_tgt_mapped -
5107  * @vport: The virtual port to check on
5108  * @cmnd: Pointer to scsi_cmnd data structure.
5109  *
5110  * This routine delays until the scsi target (aka rport) for the
5111  * command exists (is present and logged in) or we declare it non-existent.
5112  *
5113  * Return code :
5114  *  0x2003 - Error
5115  *  0x2002 - Success
5116  **/
5117 static int
5118 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5119 {
5120         struct lpfc_rport_data *rdata;
5121         struct lpfc_nodelist *pnode;
5122         unsigned long later;
5123
5124         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5125         if (!rdata) {
5126                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5127                         "0797 Tgt Map rport failure: rdata x%px\n", rdata);
5128                 return FAILED;
5129         }
5130         pnode = rdata->pnode;
5131         /*
5132          * If target is not in a MAPPED state, delay until
5133          * target is rediscovered or devloss timeout expires.
5134          */
5135         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5136         while (time_after(later, jiffies)) {
5137                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5138                         return FAILED;
5139                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5140                         return SUCCESS;
5141                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5142                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5143                 if (!rdata)
5144                         return FAILED;
5145                 pnode = rdata->pnode;
5146         }
5147         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5148             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5149                 return FAILED;
5150         return SUCCESS;
5151 }
5152
5153 /**
5154  * lpfc_reset_flush_io_context -
5155  * @vport: The virtual port (scsi_host) for the flush context
5156  * @tgt_id: If aborting by Target contect - specifies the target id
5157  * @lun_id: If aborting by Lun context - specifies the lun id
5158  * @context: specifies the context level to flush at.
5159  *
5160  * After a reset condition via TMF, we need to flush orphaned i/o
5161  * contexts from the adapter. This routine aborts any contexts
5162  * outstanding, then waits for their completions. The wait is
5163  * bounded by devloss_tmo though.
5164  *
5165  * Return code :
5166  *  0x2003 - Error
5167  *  0x2002 - Success
5168  **/
5169 static int
5170 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5171                         uint64_t lun_id, lpfc_ctx_cmd context)
5172 {
5173         struct lpfc_hba   *phba = vport->phba;
5174         unsigned long later;
5175         int cnt;
5176
5177         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5178         if (cnt)
5179                 lpfc_sli_abort_taskmgmt(vport,
5180                                         &phba->sli.sli3_ring[LPFC_FCP_RING],
5181                                         tgt_id, lun_id, context);
5182         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5183         while (time_after(later, jiffies) && cnt) {
5184                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5185                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5186         }
5187         if (cnt) {
5188                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5189                         "0724 I/O flush failure for context %s : cnt x%x\n",
5190                         ((context == LPFC_CTX_LUN) ? "LUN" :
5191                          ((context == LPFC_CTX_TGT) ? "TGT" :
5192                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5193                         cnt);
5194                 return FAILED;
5195         }
5196         return SUCCESS;
5197 }
5198
5199 /**
5200  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5201  * @cmnd: Pointer to scsi_cmnd data structure.
5202  *
5203  * This routine does a device reset by sending a LUN_RESET task management
5204  * command.
5205  *
5206  * Return code :
5207  *  0x2003 - Error
5208  *  0x2002 - Success
5209  **/
5210 static int
5211 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5212 {
5213         struct Scsi_Host  *shost = cmnd->device->host;
5214         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5215         struct lpfc_rport_data *rdata;
5216         struct lpfc_nodelist *pnode;
5217         unsigned tgt_id = cmnd->device->id;
5218         uint64_t lun_id = cmnd->device->lun;
5219         struct lpfc_scsi_event_header scsi_event;
5220         int status;
5221
5222         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5223         if (!rdata || !rdata->pnode) {
5224                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5225                                  "0798 Device Reset rdata failure: rdata x%px\n",
5226                                  rdata);
5227                 return FAILED;
5228         }
5229         pnode = rdata->pnode;
5230         status = fc_block_scsi_eh(cmnd);
5231         if (status != 0 && status != SUCCESS)
5232                 return status;
5233
5234         status = lpfc_chk_tgt_mapped(vport, cmnd);
5235         if (status == FAILED) {
5236                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5237                         "0721 Device Reset rport failure: rdata x%px\n", rdata);
5238                 return FAILED;
5239         }
5240
5241         scsi_event.event_type = FC_REG_SCSI_EVENT;
5242         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5243         scsi_event.lun = lun_id;
5244         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5245         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5246
5247         fc_host_post_vendor_event(shost, fc_get_event_number(),
5248                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5249
5250         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5251                                                 FCP_LUN_RESET);
5252
5253         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5254                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5255                          "return x%x\n", tgt_id, lun_id, status);
5256
5257         /*
5258          * We have to clean up i/o as : they may be orphaned by the TMF;
5259          * or if the TMF failed, they may be in an indeterminate state.
5260          * So, continue on.
5261          * We will report success if all the i/o aborts successfully.
5262          */
5263         if (status == SUCCESS)
5264                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5265                                                 LPFC_CTX_LUN);
5266
5267         return status;
5268 }
5269
5270 /**
5271  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5272  * @cmnd: Pointer to scsi_cmnd data structure.
5273  *
5274  * This routine does a target reset by sending a TARGET_RESET task management
5275  * command.
5276  *
5277  * Return code :
5278  *  0x2003 - Error
5279  *  0x2002 - Success
5280  **/
5281 static int
5282 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5283 {
5284         struct Scsi_Host  *shost = cmnd->device->host;
5285         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5286         struct lpfc_rport_data *rdata;
5287         struct lpfc_nodelist *pnode;
5288         unsigned tgt_id = cmnd->device->id;
5289         uint64_t lun_id = cmnd->device->lun;
5290         struct lpfc_scsi_event_header scsi_event;
5291         int status;
5292
5293         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5294         if (!rdata || !rdata->pnode) {
5295                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5296                                  "0799 Target Reset rdata failure: rdata x%px\n",
5297                                  rdata);
5298                 return FAILED;
5299         }
5300         pnode = rdata->pnode;
5301         status = fc_block_scsi_eh(cmnd);
5302         if (status != 0 && status != SUCCESS)
5303                 return status;
5304
5305         status = lpfc_chk_tgt_mapped(vport, cmnd);
5306         if (status == FAILED) {
5307                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5308                         "0722 Target Reset rport failure: rdata x%px\n", rdata);
5309                 if (pnode) {
5310                         spin_lock_irq(shost->host_lock);
5311                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5312                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5313                         spin_unlock_irq(shost->host_lock);
5314                 }
5315                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5316                                           LPFC_CTX_TGT);
5317                 return FAST_IO_FAIL;
5318         }
5319
5320         scsi_event.event_type = FC_REG_SCSI_EVENT;
5321         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5322         scsi_event.lun = 0;
5323         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5324         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5325
5326         fc_host_post_vendor_event(shost, fc_get_event_number(),
5327                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5328
5329         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5330                                         FCP_TARGET_RESET);
5331
5332         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5333                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5334                          "return x%x\n", tgt_id, lun_id, status);
5335
5336         /*
5337          * We have to clean up i/o as : they may be orphaned by the TMF;
5338          * or if the TMF failed, they may be in an indeterminate state.
5339          * So, continue on.
5340          * We will report success if all the i/o aborts successfully.
5341          */
5342         if (status == SUCCESS)
5343                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5344                                           LPFC_CTX_TGT);
5345         return status;
5346 }
5347
5348 /**
5349  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5350  * @cmnd: Pointer to scsi_cmnd data structure.
5351  *
5352  * This routine does target reset to all targets on @cmnd->device->host.
5353  * This emulates Parallel SCSI Bus Reset Semantics.
5354  *
5355  * Return code :
5356  *  0x2003 - Error
5357  *  0x2002 - Success
5358  **/
5359 static int
5360 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5361 {
5362         struct Scsi_Host  *shost = cmnd->device->host;
5363         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5364         struct lpfc_nodelist *ndlp = NULL;
5365         struct lpfc_scsi_event_header scsi_event;
5366         int match;
5367         int ret = SUCCESS, status, i;
5368
5369         scsi_event.event_type = FC_REG_SCSI_EVENT;
5370         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5371         scsi_event.lun = 0;
5372         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5373         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5374
5375         fc_host_post_vendor_event(shost, fc_get_event_number(),
5376                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5377
5378         status = fc_block_scsi_eh(cmnd);
5379         if (status != 0 && status != SUCCESS)
5380                 return status;
5381
5382         /*
5383          * Since the driver manages a single bus device, reset all
5384          * targets known to the driver.  Should any target reset
5385          * fail, this routine returns failure to the midlayer.
5386          */
5387         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5388                 /* Search for mapped node by target ID */
5389                 match = 0;
5390                 spin_lock_irq(shost->host_lock);
5391                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5392                         if (!NLP_CHK_NODE_ACT(ndlp))
5393                                 continue;
5394                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5395                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5396                                 continue;
5397                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5398                             ndlp->nlp_sid == i &&
5399                             ndlp->rport &&
5400                             ndlp->nlp_type & NLP_FCP_TARGET) {
5401                                 match = 1;
5402                                 break;
5403                         }
5404                 }
5405                 spin_unlock_irq(shost->host_lock);
5406                 if (!match)
5407                         continue;
5408
5409                 status = lpfc_send_taskmgmt(vport, cmnd,
5410                                         i, 0, FCP_TARGET_RESET);
5411
5412                 if (status != SUCCESS) {
5413                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5414                                          "0700 Bus Reset on target %d failed\n",
5415                                          i);
5416                         ret = FAILED;
5417                 }
5418         }
5419         /*
5420          * We have to clean up i/o as : they may be orphaned by the TMFs
5421          * above; or if any of the TMFs failed, they may be in an
5422          * indeterminate state.
5423          * We will report success if all the i/o aborts successfully.
5424          */
5425
5426         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5427         if (status != SUCCESS)
5428                 ret = FAILED;
5429
5430         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5431                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5432         return ret;
5433 }
5434
5435 /**
5436  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5437  * @cmnd: Pointer to scsi_cmnd data structure.
5438  *
5439  * This routine does host reset to the adaptor port. It brings the HBA
5440  * offline, performs a board restart, and then brings the board back online.
5441  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5442  * reject all outstanding SCSI commands to the host and error returned
5443  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5444  * of error handling, it will only return error if resetting of the adapter
5445  * is not successful; in all other cases, will return success.
5446  *
5447  * Return code :
5448  *  0x2003 - Error
5449  *  0x2002 - Success
5450  **/
5451 static int
5452 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5453 {
5454         struct Scsi_Host *shost = cmnd->device->host;
5455         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5456         struct lpfc_hba *phba = vport->phba;
5457         int rc, ret = SUCCESS;
5458
5459         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5460                          "3172 SCSI layer issued Host Reset Data:\n");
5461
5462         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5463         lpfc_offline(phba);
5464         rc = lpfc_sli_brdrestart(phba);
5465         if (rc)
5466                 goto error;
5467
5468         rc = lpfc_online(phba);
5469         if (rc)
5470                 goto error;
5471
5472         lpfc_unblock_mgmt_io(phba);
5473
5474         return ret;
5475 error:
5476         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5477                          "3323 Failed host reset\n");
5478         lpfc_unblock_mgmt_io(phba);
5479         return FAILED;
5480 }
5481
5482 /**
5483  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5484  * @sdev: Pointer to scsi_device.
5485  *
5486  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5487  * globally available list of scsi buffers. This routine also makes sure scsi
5488  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5489  * of scsi buffer exists for the lifetime of the driver.
5490  *
5491  * Return codes:
5492  *   non-0 - Error
5493  *   0 - Success
5494  **/
5495 static int
5496 lpfc_slave_alloc(struct scsi_device *sdev)
5497 {
5498         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5499         struct lpfc_hba   *phba = vport->phba;
5500         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5501         uint32_t total = 0;
5502         uint32_t num_to_alloc = 0;
5503         int num_allocated = 0;
5504         uint32_t sdev_cnt;
5505         struct lpfc_device_data *device_data;
5506         unsigned long flags;
5507         struct lpfc_name target_wwpn;
5508
5509         if (!rport || fc_remote_port_chkready(rport))
5510                 return -ENXIO;
5511
5512         if (phba->cfg_fof) {
5513
5514                 /*
5515                  * Check to see if the device data structure for the lun
5516                  * exists.  If not, create one.
5517                  */
5518
5519                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5520                 spin_lock_irqsave(&phba->devicelock, flags);
5521                 device_data = __lpfc_get_device_data(phba,
5522                                                      &phba->luns,
5523                                                      &vport->fc_portname,
5524                                                      &target_wwpn,
5525                                                      sdev->lun);
5526                 if (!device_data) {
5527                         spin_unlock_irqrestore(&phba->devicelock, flags);
5528                         device_data = lpfc_create_device_data(phba,
5529                                                         &vport->fc_portname,
5530                                                         &target_wwpn,
5531                                                         sdev->lun,
5532                                                         phba->cfg_XLanePriority,
5533                                                         true);
5534                         if (!device_data)
5535                                 return -ENOMEM;
5536                         spin_lock_irqsave(&phba->devicelock, flags);
5537                         list_add_tail(&device_data->listentry, &phba->luns);
5538                 }
5539                 device_data->rport_data = rport->dd_data;
5540                 device_data->available = true;
5541                 spin_unlock_irqrestore(&phba->devicelock, flags);
5542                 sdev->hostdata = device_data;
5543         } else {
5544                 sdev->hostdata = rport->dd_data;
5545         }
5546         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5547
5548         /* For SLI4, all IO buffers are pre-allocated */
5549         if (phba->sli_rev == LPFC_SLI_REV4)
5550                 return 0;
5551
5552         /* This code path is now ONLY for SLI3 adapters */
5553
5554         /*
5555          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5556          * available list of scsi buffers.  Don't allocate more than the
5557          * HBA limit conveyed to the midlayer via the host structure.  The
5558          * formula accounts for the lun_queue_depth + error handlers + 1
5559          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5560          */
5561         total = phba->total_scsi_bufs;
5562         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5563
5564         /* If allocated buffers are enough do nothing */
5565         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5566                 return 0;
5567
5568         /* Allow some exchanges to be available always to complete discovery */
5569         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5570                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5571                                  "0704 At limitation of %d preallocated "
5572                                  "command buffers\n", total);
5573                 return 0;
5574         /* Allow some exchanges to be available always to complete discovery */
5575         } else if (total + num_to_alloc >
5576                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5577                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5578                                  "0705 Allocation request of %d "
5579                                  "command buffers will exceed max of %d.  "
5580                                  "Reducing allocation request to %d.\n",
5581                                  num_to_alloc, phba->cfg_hba_queue_depth,
5582                                  (phba->cfg_hba_queue_depth - total));
5583                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5584         }
5585         num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc);
5586         if (num_to_alloc != num_allocated) {
5587                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5588                                          "0708 Allocation request of %d "
5589                                          "command buffers did not succeed.  "
5590                                          "Allocated %d buffers.\n",
5591                                          num_to_alloc, num_allocated);
5592         }
5593         if (num_allocated > 0)
5594                 phba->total_scsi_bufs += num_allocated;
5595         return 0;
5596 }
5597
5598 /**
5599  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5600  * @sdev: Pointer to scsi_device.
5601  *
5602  * This routine configures following items
5603  *   - Tag command queuing support for @sdev if supported.
5604  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5605  *
5606  * Return codes:
5607  *   0 - Success
5608  **/
5609 static int
5610 lpfc_slave_configure(struct scsi_device *sdev)
5611 {
5612         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5613         struct lpfc_hba   *phba = vport->phba;
5614
5615         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5616
5617         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5618                 lpfc_sli_handle_fast_ring_event(phba,
5619                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5620                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5621                         lpfc_poll_rearm_timer(phba);
5622         }
5623
5624         return 0;
5625 }
5626
5627 /**
5628  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5629  * @sdev: Pointer to scsi_device.
5630  *
5631  * This routine sets @sdev hostatdata filed to null.
5632  **/
5633 static void
5634 lpfc_slave_destroy(struct scsi_device *sdev)
5635 {
5636         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5637         struct lpfc_hba   *phba = vport->phba;
5638         unsigned long flags;
5639         struct lpfc_device_data *device_data = sdev->hostdata;
5640
5641         atomic_dec(&phba->sdev_cnt);
5642         if ((phba->cfg_fof) && (device_data)) {
5643                 spin_lock_irqsave(&phba->devicelock, flags);
5644                 device_data->available = false;
5645                 if (!device_data->oas_enabled)
5646                         lpfc_delete_device_data(phba, device_data);
5647                 spin_unlock_irqrestore(&phba->devicelock, flags);
5648         }
5649         sdev->hostdata = NULL;
5650         return;
5651 }
5652
5653 /**
5654  * lpfc_create_device_data - creates and initializes device data structure for OAS
5655  * @pha: Pointer to host bus adapter structure.
5656  * @vport_wwpn: Pointer to vport's wwpn information
5657  * @target_wwpn: Pointer to target's wwpn information
5658  * @lun: Lun on target
5659  * @atomic_create: Flag to indicate if memory should be allocated using the
5660  *                GFP_ATOMIC flag or not.
5661  *
5662  * This routine creates a device data structure which will contain identifying
5663  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5664  * whether or not the corresponding lun is available by the system,
5665  * and pointer to the rport data.
5666  *
5667  * Return codes:
5668  *   NULL - Error
5669  *   Pointer to lpfc_device_data - Success
5670  **/
5671 struct lpfc_device_data*
5672 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5673                         struct lpfc_name *target_wwpn, uint64_t lun,
5674                         uint32_t pri, bool atomic_create)
5675 {
5676
5677         struct lpfc_device_data *lun_info;
5678         int memory_flags;
5679
5680         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5681             !(phba->cfg_fof))
5682                 return NULL;
5683
5684         /* Attempt to create the device data to contain lun info */
5685
5686         if (atomic_create)
5687                 memory_flags = GFP_ATOMIC;
5688         else
5689                 memory_flags = GFP_KERNEL;
5690         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5691         if (!lun_info)
5692                 return NULL;
5693         INIT_LIST_HEAD(&lun_info->listentry);
5694         lun_info->rport_data  = NULL;
5695         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5696                sizeof(struct lpfc_name));
5697         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5698                sizeof(struct lpfc_name));
5699         lun_info->device_id.lun = lun;
5700         lun_info->oas_enabled = false;
5701         lun_info->priority = pri;
5702         lun_info->available = false;
5703         return lun_info;
5704 }
5705
5706 /**
5707  * lpfc_delete_device_data - frees a device data structure for OAS
5708  * @pha: Pointer to host bus adapter structure.
5709  * @lun_info: Pointer to device data structure to free.
5710  *
5711  * This routine frees the previously allocated device data structure passed.
5712  *
5713  **/
5714 void
5715 lpfc_delete_device_data(struct lpfc_hba *phba,
5716                         struct lpfc_device_data *lun_info)
5717 {
5718
5719         if (unlikely(!phba) || !lun_info  ||
5720             !(phba->cfg_fof))
5721                 return;
5722
5723         if (!list_empty(&lun_info->listentry))
5724                 list_del(&lun_info->listentry);
5725         mempool_free(lun_info, phba->device_data_mem_pool);
5726         return;
5727 }
5728
5729 /**
5730  * __lpfc_get_device_data - returns the device data for the specified lun
5731  * @pha: Pointer to host bus adapter structure.
5732  * @list: Point to list to search.
5733  * @vport_wwpn: Pointer to vport's wwpn information
5734  * @target_wwpn: Pointer to target's wwpn information
5735  * @lun: Lun on target
5736  *
5737  * This routine searches the list passed for the specified lun's device data.
5738  * This function does not hold locks, it is the responsibility of the caller
5739  * to ensure the proper lock is held before calling the function.
5740  *
5741  * Return codes:
5742  *   NULL - Error
5743  *   Pointer to lpfc_device_data - Success
5744  **/
5745 struct lpfc_device_data*
5746 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5747                        struct lpfc_name *vport_wwpn,
5748                        struct lpfc_name *target_wwpn, uint64_t lun)
5749 {
5750
5751         struct lpfc_device_data *lun_info;
5752
5753         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5754             !phba->cfg_fof)
5755                 return NULL;
5756
5757         /* Check to see if the lun is already enabled for OAS. */
5758
5759         list_for_each_entry(lun_info, list, listentry) {
5760                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5761                             sizeof(struct lpfc_name)) == 0) &&
5762                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5763                             sizeof(struct lpfc_name)) == 0) &&
5764                     (lun_info->device_id.lun == lun))
5765                         return lun_info;
5766         }
5767
5768         return NULL;
5769 }
5770
5771 /**
5772  * lpfc_find_next_oas_lun - searches for the next oas lun
5773  * @pha: Pointer to host bus adapter structure.
5774  * @vport_wwpn: Pointer to vport's wwpn information
5775  * @target_wwpn: Pointer to target's wwpn information
5776  * @starting_lun: Pointer to the lun to start searching for
5777  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5778  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5779  * @found_lun: Pointer to the found lun.
5780  * @found_lun_status: Pointer to status of the found lun.
5781  *
5782  * This routine searches the luns list for the specified lun
5783  * or the first lun for the vport/target.  If the vport wwpn contains
5784  * a zero value then a specific vport is not specified. In this case
5785  * any vport which contains the lun will be considered a match.  If the
5786  * target wwpn contains a zero value then a specific target is not specified.
5787  * In this case any target which contains the lun will be considered a
5788  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5789  * are returned.  The function will also return the next lun if available.
5790  * If the next lun is not found, starting_lun parameter will be set to
5791  * NO_MORE_OAS_LUN.
5792  *
5793  * Return codes:
5794  *   non-0 - Error
5795  *   0 - Success
5796  **/
5797 bool
5798 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5799                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5800                        struct lpfc_name *found_vport_wwpn,
5801                        struct lpfc_name *found_target_wwpn,
5802                        uint64_t *found_lun,
5803                        uint32_t *found_lun_status,
5804                        uint32_t *found_lun_pri)
5805 {
5806
5807         unsigned long flags;
5808         struct lpfc_device_data *lun_info;
5809         struct lpfc_device_id *device_id;
5810         uint64_t lun;
5811         bool found = false;
5812
5813         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5814             !starting_lun || !found_vport_wwpn ||
5815             !found_target_wwpn || !found_lun || !found_lun_status ||
5816             (*starting_lun == NO_MORE_OAS_LUN) ||
5817             !phba->cfg_fof)
5818                 return false;
5819
5820         lun = *starting_lun;
5821         *found_lun = NO_MORE_OAS_LUN;
5822         *starting_lun = NO_MORE_OAS_LUN;
5823
5824         /* Search for lun or the lun closet in value */
5825
5826         spin_lock_irqsave(&phba->devicelock, flags);
5827         list_for_each_entry(lun_info, &phba->luns, listentry) {
5828                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5829                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5830                             sizeof(struct lpfc_name)) == 0)) &&
5831                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5832                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5833                             sizeof(struct lpfc_name)) == 0)) &&
5834                     (lun_info->oas_enabled)) {
5835                         device_id = &lun_info->device_id;
5836                         if ((!found) &&
5837                             ((lun == FIND_FIRST_OAS_LUN) ||
5838                              (device_id->lun == lun))) {
5839                                 *found_lun = device_id->lun;
5840                                 memcpy(found_vport_wwpn,
5841                                        &device_id->vport_wwpn,
5842                                        sizeof(struct lpfc_name));
5843                                 memcpy(found_target_wwpn,
5844                                        &device_id->target_wwpn,
5845                                        sizeof(struct lpfc_name));
5846                                 if (lun_info->available)
5847                                         *found_lun_status =
5848                                                 OAS_LUN_STATUS_EXISTS;
5849                                 else
5850                                         *found_lun_status = 0;
5851                                 *found_lun_pri = lun_info->priority;
5852                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5853                                         memset(vport_wwpn, 0x0,
5854                                                sizeof(struct lpfc_name));
5855                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5856                                         memset(target_wwpn, 0x0,
5857                                                sizeof(struct lpfc_name));
5858                                 found = true;
5859                         } else if (found) {
5860                                 *starting_lun = device_id->lun;
5861                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5862                                        sizeof(struct lpfc_name));
5863                                 memcpy(target_wwpn, &device_id->target_wwpn,
5864                                        sizeof(struct lpfc_name));
5865                                 break;
5866                         }
5867                 }
5868         }
5869         spin_unlock_irqrestore(&phba->devicelock, flags);
5870         return found;
5871 }
5872
5873 /**
5874  * lpfc_enable_oas_lun - enables a lun for OAS operations
5875  * @pha: Pointer to host bus adapter structure.
5876  * @vport_wwpn: Pointer to vport's wwpn information
5877  * @target_wwpn: Pointer to target's wwpn information
5878  * @lun: Lun
5879  *
5880  * This routine enables a lun for oas operations.  The routines does so by
5881  * doing the following :
5882  *
5883  *   1) Checks to see if the device data for the lun has been created.
5884  *   2) If found, sets the OAS enabled flag if not set and returns.
5885  *   3) Otherwise, creates a device data structure.
5886  *   4) If successfully created, indicates the device data is for an OAS lun,
5887  *   indicates the lun is not available and add to the list of luns.
5888  *
5889  * Return codes:
5890  *   false - Error
5891  *   true - Success
5892  **/
5893 bool
5894 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5895                     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5896 {
5897
5898         struct lpfc_device_data *lun_info;
5899         unsigned long flags;
5900
5901         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5902             !phba->cfg_fof)
5903                 return false;
5904
5905         spin_lock_irqsave(&phba->devicelock, flags);
5906
5907         /* Check to see if the device data for the lun has been created */
5908         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5909                                           target_wwpn, lun);
5910         if (lun_info) {
5911                 if (!lun_info->oas_enabled)
5912                         lun_info->oas_enabled = true;
5913                 lun_info->priority = pri;
5914                 spin_unlock_irqrestore(&phba->devicelock, flags);
5915                 return true;
5916         }
5917
5918         /* Create an lun info structure and add to list of luns */
5919         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5920                                            pri, true);
5921         if (lun_info) {
5922                 lun_info->oas_enabled = true;
5923                 lun_info->priority = pri;
5924                 lun_info->available = false;
5925                 list_add_tail(&lun_info->listentry, &phba->luns);
5926                 spin_unlock_irqrestore(&phba->devicelock, flags);
5927                 return true;
5928         }
5929         spin_unlock_irqrestore(&phba->devicelock, flags);
5930         return false;
5931 }
5932
5933 /**
5934  * lpfc_disable_oas_lun - disables a lun for OAS operations
5935  * @pha: Pointer to host bus adapter structure.
5936  * @vport_wwpn: Pointer to vport's wwpn information
5937  * @target_wwpn: Pointer to target's wwpn information
5938  * @lun: Lun
5939  *
5940  * This routine disables a lun for oas operations.  The routines does so by
5941  * doing the following :
5942  *
5943  *   1) Checks to see if the device data for the lun is created.
5944  *   2) If present, clears the flag indicating this lun is for OAS.
5945  *   3) If the lun is not available by the system, the device data is
5946  *   freed.
5947  *
5948  * Return codes:
5949  *   false - Error
5950  *   true - Success
5951  **/
5952 bool
5953 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5954                      struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5955 {
5956
5957         struct lpfc_device_data *lun_info;
5958         unsigned long flags;
5959
5960         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5961             !phba->cfg_fof)
5962                 return false;
5963
5964         spin_lock_irqsave(&phba->devicelock, flags);
5965
5966         /* Check to see if the lun is available. */
5967         lun_info = __lpfc_get_device_data(phba,
5968                                           &phba->luns, vport_wwpn,
5969                                           target_wwpn, lun);
5970         if (lun_info) {
5971                 lun_info->oas_enabled = false;
5972                 lun_info->priority = pri;
5973                 if (!lun_info->available)
5974                         lpfc_delete_device_data(phba, lun_info);
5975                 spin_unlock_irqrestore(&phba->devicelock, flags);
5976                 return true;
5977         }
5978
5979         spin_unlock_irqrestore(&phba->devicelock, flags);
5980         return false;
5981 }
5982
5983 static int
5984 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
5985 {
5986         return SCSI_MLQUEUE_HOST_BUSY;
5987 }
5988
5989 static int
5990 lpfc_no_handler(struct scsi_cmnd *cmnd)
5991 {
5992         return FAILED;
5993 }
5994
5995 static int
5996 lpfc_no_slave(struct scsi_device *sdev)
5997 {
5998         return -ENODEV;
5999 }
6000
6001 struct scsi_host_template lpfc_template_nvme = {
6002         .module                 = THIS_MODULE,
6003         .name                   = LPFC_DRIVER_NAME,
6004         .proc_name              = LPFC_DRIVER_NAME,
6005         .info                   = lpfc_info,
6006         .queuecommand           = lpfc_no_command,
6007         .eh_abort_handler       = lpfc_no_handler,
6008         .eh_device_reset_handler = lpfc_no_handler,
6009         .eh_target_reset_handler = lpfc_no_handler,
6010         .eh_bus_reset_handler   = lpfc_no_handler,
6011         .eh_host_reset_handler  = lpfc_no_handler,
6012         .slave_alloc            = lpfc_no_slave,
6013         .slave_configure        = lpfc_no_slave,
6014         .scan_finished          = lpfc_scan_finished,
6015         .this_id                = -1,
6016         .sg_tablesize           = 1,
6017         .cmd_per_lun            = 1,
6018         .shost_attrs            = lpfc_hba_attrs,
6019         .max_sectors            = 0xFFFF,
6020         .vendor_id              = LPFC_NL_VENDOR_ID,
6021         .track_queue_depth      = 0,
6022 };
6023
6024 struct scsi_host_template lpfc_template_no_hr = {
6025         .module                 = THIS_MODULE,
6026         .name                   = LPFC_DRIVER_NAME,
6027         .proc_name              = LPFC_DRIVER_NAME,
6028         .info                   = lpfc_info,
6029         .queuecommand           = lpfc_queuecommand,
6030         .eh_timed_out           = fc_eh_timed_out,
6031         .eh_abort_handler       = lpfc_abort_handler,
6032         .eh_device_reset_handler = lpfc_device_reset_handler,
6033         .eh_target_reset_handler = lpfc_target_reset_handler,
6034         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6035         .slave_alloc            = lpfc_slave_alloc,
6036         .slave_configure        = lpfc_slave_configure,
6037         .slave_destroy          = lpfc_slave_destroy,
6038         .scan_finished          = lpfc_scan_finished,
6039         .this_id                = -1,
6040         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6041         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6042         .shost_attrs            = lpfc_hba_attrs,
6043         .max_sectors            = 0xFFFFFFFF,
6044         .vendor_id              = LPFC_NL_VENDOR_ID,
6045         .change_queue_depth     = scsi_change_queue_depth,
6046         .track_queue_depth      = 1,
6047 };
6048
6049 struct scsi_host_template lpfc_template = {
6050         .module                 = THIS_MODULE,
6051         .name                   = LPFC_DRIVER_NAME,
6052         .proc_name              = LPFC_DRIVER_NAME,
6053         .info                   = lpfc_info,
6054         .queuecommand           = lpfc_queuecommand,
6055         .eh_timed_out           = fc_eh_timed_out,
6056         .eh_abort_handler       = lpfc_abort_handler,
6057         .eh_device_reset_handler = lpfc_device_reset_handler,
6058         .eh_target_reset_handler = lpfc_target_reset_handler,
6059         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6060         .eh_host_reset_handler  = lpfc_host_reset_handler,
6061         .slave_alloc            = lpfc_slave_alloc,
6062         .slave_configure        = lpfc_slave_configure,
6063         .slave_destroy          = lpfc_slave_destroy,
6064         .scan_finished          = lpfc_scan_finished,
6065         .this_id                = -1,
6066         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6067         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6068         .shost_attrs            = lpfc_hba_attrs,
6069         .max_sectors            = 0xFFFF,
6070         .vendor_id              = LPFC_NL_VENDOR_ID,
6071         .change_queue_depth     = scsi_change_queue_depth,
6072         .track_queue_depth      = 1,
6073 };
6074
6075 struct scsi_host_template lpfc_vport_template = {
6076         .module                 = THIS_MODULE,
6077         .name                   = LPFC_DRIVER_NAME,
6078         .proc_name              = LPFC_DRIVER_NAME,
6079         .info                   = lpfc_info,
6080         .queuecommand           = lpfc_queuecommand,
6081         .eh_timed_out           = fc_eh_timed_out,
6082         .eh_abort_handler       = lpfc_abort_handler,
6083         .eh_device_reset_handler = lpfc_device_reset_handler,
6084         .eh_target_reset_handler = lpfc_target_reset_handler,
6085         .slave_alloc            = lpfc_slave_alloc,
6086         .slave_configure        = lpfc_slave_configure,
6087         .slave_destroy          = lpfc_slave_destroy,
6088         .scan_finished          = lpfc_scan_finished,
6089         .this_id                = -1,
6090         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6091         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6092         .shost_attrs            = lpfc_vport_attrs,
6093         .max_sectors            = 0xFFFF,
6094         .change_queue_depth     = scsi_change_queue_depth,
6095         .track_queue_depth      = 1,
6096 };