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