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) 2017-2018 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 int _dump_buf_done = 1;
  57
  58 static char *dif_op_str[] = {
  59         "PROT_NORMAL",
  60         "PROT_READ_INSERT",
  61         "PROT_WRITE_STRIP",
  62         "PROT_READ_STRIP",
  63         "PROT_WRITE_INSERT",
  64         "PROT_READ_PASS",
  65         "PROT_WRITE_PASS",
  66 };
  67
  68 struct scsi_dif_tuple {
  69         __be16 guard_tag;       /* Checksum */
  70         __be16 app_tag;         /* Opaque storage */
  71         __be32 ref_tag;         /* Target LBA or indirect LBA */
  72 };
  73
  74 static struct lpfc_rport_data *
  75 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  76 {
  77         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  78
  79         if (vport->phba->cfg_fof)
  80                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  81         else
  82                 return (struct lpfc_rport_data *)sdev->hostdata;
  83 }
  84
  85 static void
  86 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  87 static void
  88 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  89 static int
  90 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  91
  92 static void
  93 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  94 {
  95         void *src, *dst;
  96         struct scatterlist *sgde = scsi_sglist(cmnd);
  97
  98         if (!_dump_buf_data) {
  99                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 100                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 101                                 __func__);
 102                 return;
 103         }
 104
 105
 106         if (!sgde) {
 107                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 108                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
 109                 return;
 110         }
 111
 112         dst = (void *) _dump_buf_data;
 113         while (sgde) {
 114                 src = sg_virt(sgde);
 115                 memcpy(dst, src, sgde->length);
 116                 dst += sgde->length;
 117                 sgde = sg_next(sgde);
 118         }
 119 }
 120
 121 static void
 122 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
 123 {
 124         void *src, *dst;
 125         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 126
 127         if (!_dump_buf_dif) {
 128                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 129                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 130                                 __func__);
 131                 return;
 132         }
 133
 134         if (!sgde) {
 135                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 136                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 137                 return;
 138         }
 139
 140         dst = _dump_buf_dif;
 141         while (sgde) {
 142                 src = sg_virt(sgde);
 143                 memcpy(dst, src, sgde->length);
 144                 dst += sgde->length;
 145                 sgde = sg_next(sgde);
 146         }
 147 }
 148
 149 static inline unsigned
 150 lpfc_cmd_blksize(struct scsi_cmnd *sc)
 151 {
 152         return sc->device->sector_size;
 153 }
 154
 155 #define LPFC_CHECK_PROTECT_GUARD        1
 156 #define LPFC_CHECK_PROTECT_REF          2
 157 static inline unsigned
 158 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 159 {
 160         return 1;
 161 }
 162
 163 static inline unsigned
 164 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 165 {
 166         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 167                 return 0;
 168         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 169                 return 1;
 170         return 0;
 171 }
 172
 173 /**
 174  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 175  * @phba: Pointer to HBA object.
 176  * @lpfc_cmd: lpfc scsi command object pointer.
 177  *
 178  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 179  * set the last bit in the response sge entry.
 180  **/
 181 static void
 182 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 183                                 struct lpfc_scsi_buf *lpfc_cmd)
 184 {
 185         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 186         if (sgl) {
 187                 sgl += 1;
 188                 sgl->word2 = le32_to_cpu(sgl->word2);
 189                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 190                 sgl->word2 = cpu_to_le32(sgl->word2);
 191         }
 192 }
 193
 194 /**
 195  * lpfc_update_stats - Update statistical data for the command completion
 196  * @phba: Pointer to HBA object.
 197  * @lpfc_cmd: lpfc scsi command object pointer.
 198  *
 199  * This function is called when there is a command completion and this
 200  * function updates the statistical data for the command completion.
 201  **/
 202 static void
 203 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 204 {
 205         struct lpfc_rport_data *rdata;
 206         struct lpfc_nodelist *pnode;
 207         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 208         unsigned long flags;
 209         struct Scsi_Host  *shost = cmd->device->host;
 210         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 211         unsigned long latency;
 212         int i;
 213
 214         if (!vport->stat_data_enabled ||
 215             vport->stat_data_blocked ||
 216             (cmd->result))
 217                 return;
 218
 219         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 220         rdata = lpfc_cmd->rdata;
 221         pnode = rdata->pnode;
 222
 223         spin_lock_irqsave(shost->host_lock, flags);
 224         if (!pnode ||
 225             !pnode->lat_data ||
 226             (phba->bucket_type == LPFC_NO_BUCKET)) {
 227                 spin_unlock_irqrestore(shost->host_lock, flags);
 228                 return;
 229         }
 230
 231         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 232                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 233                         phba->bucket_step;
 234                 /* check array subscript bounds */
 235                 if (i < 0)
 236                         i = 0;
 237                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 238                         i = LPFC_MAX_BUCKET_COUNT - 1;
 239         } else {
 240                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 241                         if (latency <= (phba->bucket_base +
 242                                 ((1<<i)*phba->bucket_step)))
 243                                 break;
 244         }
 245
 246         pnode->lat_data[i].cmd_count++;
 247         spin_unlock_irqrestore(shost->host_lock, flags);
 248 }
 249
 250 /**
 251  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 252  * @phba: The Hba for which this call is being executed.
 253  *
 254  * This routine is called when there is resource error in driver or firmware.
 255  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 256  * posts at most 1 event each second. This routine wakes up worker thread of
 257  * @phba to process WORKER_RAM_DOWN_EVENT event.
 258  *
 259  * This routine should be called with no lock held.
 260  **/
 261 void
 262 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 263 {
 264         unsigned long flags;
 265         uint32_t evt_posted;
 266         unsigned long expires;
 267
 268         spin_lock_irqsave(&phba->hbalock, flags);
 269         atomic_inc(&phba->num_rsrc_err);
 270         phba->last_rsrc_error_time = jiffies;
 271
 272         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 273         if (time_after(expires, jiffies)) {
 274                 spin_unlock_irqrestore(&phba->hbalock, flags);
 275                 return;
 276         }
 277
 278         phba->last_ramp_down_time = jiffies;
 279
 280         spin_unlock_irqrestore(&phba->hbalock, flags);
 281
 282         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 283         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 284         if (!evt_posted)
 285                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 286         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 287
 288         if (!evt_posted)
 289                 lpfc_worker_wake_up(phba);
 290         return;
 291 }
 292
 293 /**
 294  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 295  * @phba: The Hba for which this call is being executed.
 296  *
 297  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 298  * thread.This routine reduces queue depth for all scsi device on each vport
 299  * associated with @phba.
 300  **/
 301 void
 302 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 303 {
 304         struct lpfc_vport **vports;
 305         struct Scsi_Host  *shost;
 306         struct scsi_device *sdev;
 307         unsigned long new_queue_depth;
 308         unsigned long num_rsrc_err, num_cmd_success;
 309         int i;
 310
 311         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 312         num_cmd_success = atomic_read(&phba->num_cmd_success);
 313
 314         /*
 315          * The error and success command counters are global per
 316          * driver instance.  If another handler has already
 317          * operated on this error event, just exit.
 318          */
 319         if (num_rsrc_err == 0)
 320                 return;
 321
 322         vports = lpfc_create_vport_work_array(phba);
 323         if (vports != NULL)
 324                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 325                         shost = lpfc_shost_from_vport(vports[i]);
 326                         shost_for_each_device(sdev, shost) {
 327                                 new_queue_depth =
 328                                         sdev->queue_depth * num_rsrc_err /
 329                                         (num_rsrc_err + num_cmd_success);
 330                                 if (!new_queue_depth)
 331                                         new_queue_depth = sdev->queue_depth - 1;
 332                                 else
 333                                         new_queue_depth = sdev->queue_depth -
 334                                                                 new_queue_depth;
 335                                 scsi_change_queue_depth(sdev, new_queue_depth);
 336                         }
 337                 }
 338         lpfc_destroy_vport_work_array(phba, vports);
 339         atomic_set(&phba->num_rsrc_err, 0);
 340         atomic_set(&phba->num_cmd_success, 0);
 341 }
 342
 343 /**
 344  * lpfc_scsi_dev_block - set all scsi hosts to block state
 345  * @phba: Pointer to HBA context object.
 346  *
 347  * This function walks vport list and set each SCSI host to block state
 348  * by invoking fc_remote_port_delete() routine. This function is invoked
 349  * with EEH when device's PCI slot has been permanently disabled.
 350  **/
 351 void
 352 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 353 {
 354         struct lpfc_vport **vports;
 355         struct Scsi_Host  *shost;
 356         struct scsi_device *sdev;
 357         struct fc_rport *rport;
 358         int i;
 359
 360         vports = lpfc_create_vport_work_array(phba);
 361         if (vports != NULL)
 362                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 363                         shost = lpfc_shost_from_vport(vports[i]);
 364                         shost_for_each_device(sdev, shost) {
 365                                 rport = starget_to_rport(scsi_target(sdev));
 366                                 fc_remote_port_delete(rport);
 367                         }
 368                 }
 369         lpfc_destroy_vport_work_array(phba, vports);
 370 }
 371
 372 /**
 373  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 374  * @vport: The virtual port for which this call being executed.
 375  * @num_to_allocate: The requested number of buffers to allocate.
 376  *
 377  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 378  * the scsi buffer contains all the necessary information needed to initiate
 379  * a SCSI I/O. The non-DMAable buffer region contains information to build
 380  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 381  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 382  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 383  *
 384  * Return codes:
 385  *   int - number of scsi buffers that were allocated.
 386  *   0 = failure, less than num_to_alloc is a partial failure.
 387  **/
 388 static int
 389 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 390 {
 391         struct lpfc_hba *phba = vport->phba;
 392         struct lpfc_scsi_buf *psb;
 393         struct ulp_bde64 *bpl;
 394         IOCB_t *iocb;
 395         dma_addr_t pdma_phys_fcp_cmd;
 396         dma_addr_t pdma_phys_fcp_rsp;
 397         dma_addr_t pdma_phys_bpl;
 398         uint16_t iotag;
 399         int bcnt, bpl_size;
 400
 401         bpl_size = phba->cfg_sg_dma_buf_size -
 402                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 403
 404         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 405                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 406                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 407                          (int)sizeof(struct fcp_cmnd),
 408                          (int)sizeof(struct fcp_rsp), bpl_size);
 409
 410         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 411                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 412                 if (!psb)
 413                         break;
 414
 415                 /*
 416                  * Get memory from the pci pool to map the virt space to pci
 417                  * bus space for an I/O.  The DMA buffer includes space for the
 418                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 419                  * necessary to support the sg_tablesize.
 420                  */
 421                 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
 422                                         GFP_KERNEL, &psb->dma_handle);
 423                 if (!psb->data) {
 424                         kfree(psb);
 425                         break;
 426                 }
 427
 428
 429                 /* Allocate iotag for psb->cur_iocbq. */
 430                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 431                 if (iotag == 0) {
 432                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 433                                       psb->data, psb->dma_handle);
 434                         kfree(psb);
 435                         break;
 436                 }
 437                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 438
 439                 psb->fcp_cmnd = psb->data;
 440                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 441                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 442                         sizeof(struct fcp_rsp);
 443
 444                 /* Initialize local short-hand pointers. */
 445                 bpl = psb->fcp_bpl;
 446                 pdma_phys_fcp_cmd = psb->dma_handle;
 447                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 448                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 449                         sizeof(struct fcp_rsp);
 450
 451                 /*
 452                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 453                  * are sg list bdes.  Initialize the first two and leave the
 454                  * rest for queuecommand.
 455                  */
 456                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 457                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 458                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 459                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 460                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 461
 462                 /* Setup the physical region for the FCP RSP */
 463                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 464                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 465                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 466                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 467                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 468
 469                 /*
 470                  * Since the IOCB for the FCP I/O is built into this
 471                  * lpfc_scsi_buf, initialize it with all known data now.
 472                  */
 473                 iocb = &psb->cur_iocbq.iocb;
 474                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 475                 if ((phba->sli_rev == 3) &&
 476                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 477                         /* fill in immediate fcp command BDE */
 478                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 479                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 480                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 481                                         unsli3.fcp_ext.icd);
 482                         iocb->un.fcpi64.bdl.addrHigh = 0;
 483                         iocb->ulpBdeCount = 0;
 484                         iocb->ulpLe = 0;
 485                         /* fill in response BDE */
 486                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 487                                                         BUFF_TYPE_BDE_64;
 488                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 489                                 sizeof(struct fcp_rsp);
 490                         iocb->unsli3.fcp_ext.rbde.addrLow =
 491                                 putPaddrLow(pdma_phys_fcp_rsp);
 492                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 493                                 putPaddrHigh(pdma_phys_fcp_rsp);
 494                 } else {
 495                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 496                         iocb->un.fcpi64.bdl.bdeSize =
 497                                         (2 * sizeof(struct ulp_bde64));
 498                         iocb->un.fcpi64.bdl.addrLow =
 499                                         putPaddrLow(pdma_phys_bpl);
 500                         iocb->un.fcpi64.bdl.addrHigh =
 501                                         putPaddrHigh(pdma_phys_bpl);
 502                         iocb->ulpBdeCount = 1;
 503                         iocb->ulpLe = 1;
 504                 }
 505                 iocb->ulpClass = CLASS3;
 506                 psb->status = IOSTAT_SUCCESS;
 507                 /* Put it back into the SCSI buffer list */
 508                 psb->cur_iocbq.context1  = psb;
 509                 lpfc_release_scsi_buf_s3(phba, psb);
 510
 511         }
 512
 513         return bcnt;
 514 }
 515
 516 /**
 517  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 518  * @vport: pointer to lpfc vport data structure.
 519  *
 520  * This routine is invoked by the vport cleanup for deletions and the cleanup
 521  * for an ndlp on removal.
 522  **/
 523 void
 524 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 525 {
 526         struct lpfc_hba *phba = vport->phba;
 527         struct lpfc_scsi_buf *psb, *next_psb;
 528         unsigned long iflag = 0;
 529
 530         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 531                 return;
 532         spin_lock_irqsave(&phba->hbalock, iflag);
 533         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 534         list_for_each_entry_safe(psb, next_psb,
 535                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 536                 if (psb->rdata && psb->rdata->pnode
 537                         && psb->rdata->pnode->vport == vport)
 538                         psb->rdata = NULL;
 539         }
 540         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 541         spin_unlock_irqrestore(&phba->hbalock, iflag);
 542 }
 543
 544 /**
 545  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 546  * @phba: pointer to lpfc hba data structure.
 547  * @axri: pointer to the fcp xri abort wcqe structure.
 548  *
 549  * This routine is invoked by the worker thread to process a SLI4 fast-path
 550  * FCP aborted xri.
 551  **/
 552 void
 553 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 554                           struct sli4_wcqe_xri_aborted *axri)
 555 {
 556         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 557         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 558         struct lpfc_scsi_buf *psb, *next_psb;
 559         unsigned long iflag = 0;
 560         struct lpfc_iocbq *iocbq;
 561         int i;
 562         struct lpfc_nodelist *ndlp;
 563         int rrq_empty = 0;
 564         struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
 565
 566         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 567                 return;
 568         spin_lock_irqsave(&phba->hbalock, iflag);
 569         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 570         list_for_each_entry_safe(psb, next_psb,
 571                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 572                 if (psb->cur_iocbq.sli4_xritag == xri) {
 573                         list_del(&psb->list);
 574                         psb->exch_busy = 0;
 575                         psb->status = IOSTAT_SUCCESS;
 576                         spin_unlock(
 577                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 578                         if (psb->rdata && psb->rdata->pnode)
 579                                 ndlp = psb->rdata->pnode;
 580                         else
 581                                 ndlp = NULL;
 582
 583                         rrq_empty = list_empty(&phba->active_rrq_list);
 584                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 585                         if (ndlp) {
 586                                 lpfc_set_rrq_active(phba, ndlp,
 587                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 588                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 589                         }
 590                         lpfc_release_scsi_buf_s4(phba, psb);
 591                         if (rrq_empty)
 592                                 lpfc_worker_wake_up(phba);
 593                         return;
 594                 }
 595         }
 596         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 597         for (i = 1; i <= phba->sli.last_iotag; i++) {
 598                 iocbq = phba->sli.iocbq_lookup[i];
 599
 600                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 601                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 602                         continue;
 603                 if (iocbq->sli4_xritag != xri)
 604                         continue;
 605                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 606                 psb->exch_busy = 0;
 607                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 608                 if (!list_empty(&pring->txq))
 609                         lpfc_worker_wake_up(phba);
 610                 return;
 611
 612         }
 613         spin_unlock_irqrestore(&phba->hbalock, iflag);
 614 }
 615
 616 /**
 617  * lpfc_sli4_post_scsi_sgl_list - Post blocks of scsi buffer sgls from a list
 618  * @phba: pointer to lpfc hba data structure.
 619  * @post_sblist: pointer to the scsi buffer list.
 620  *
 621  * This routine walks a list of scsi buffers that was passed in. It attempts
 622  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 623  * uses the non-embedded SGL block post mailbox commands to post to the port.
 624  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 625  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 626  * must be local list, thus no lock is needed when manipulate the list.
 627  *
 628  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 629  **/
 630 static int
 631 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 632                              struct list_head *post_sblist, int sb_count)
 633 {
 634         struct lpfc_scsi_buf *psb, *psb_next;
 635         int status, sgl_size;
 636         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 637         dma_addr_t pdma_phys_bpl1;
 638         int last_xritag = NO_XRI;
 639         LIST_HEAD(prep_sblist);
 640         LIST_HEAD(blck_sblist);
 641         LIST_HEAD(scsi_sblist);
 642
 643         /* sanity check */
 644         if (sb_count <= 0)
 645                 return -EINVAL;
 646
 647         sgl_size = phba->cfg_sg_dma_buf_size -
 648                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 649
 650         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 651                 list_del_init(&psb->list);
 652                 block_cnt++;
 653                 if ((last_xritag != NO_XRI) &&
 654                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 655                         /* a hole in xri block, form a sgl posting block */
 656                         list_splice_init(&prep_sblist, &blck_sblist);
 657                         post_cnt = block_cnt - 1;
 658                         /* prepare list for next posting block */
 659                         list_add_tail(&psb->list, &prep_sblist);
 660                         block_cnt = 1;
 661                 } else {
 662                         /* prepare list for next posting block */
 663                         list_add_tail(&psb->list, &prep_sblist);
 664                         /* enough sgls for non-embed sgl mbox command */
 665                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 666                                 list_splice_init(&prep_sblist, &blck_sblist);
 667                                 post_cnt = block_cnt;
 668                                 block_cnt = 0;
 669                         }
 670                 }
 671                 num_posting++;
 672                 last_xritag = psb->cur_iocbq.sli4_xritag;
 673
 674                 /* end of repost sgl list condition for SCSI buffers */
 675                 if (num_posting == sb_count) {
 676                         if (post_cnt == 0) {
 677                                 /* last sgl posting block */
 678                                 list_splice_init(&prep_sblist, &blck_sblist);
 679                                 post_cnt = block_cnt;
 680                         } else if (block_cnt == 1) {
 681                                 /* last single sgl with non-contiguous xri */
 682                                 if (sgl_size > SGL_PAGE_SIZE)
 683                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 684                                                                 SGL_PAGE_SIZE;
 685                                 else
 686                                         pdma_phys_bpl1 = 0;
 687                                 status = lpfc_sli4_post_sgl(phba,
 688                                                 psb->dma_phys_bpl,
 689                                                 pdma_phys_bpl1,
 690                                                 psb->cur_iocbq.sli4_xritag);
 691                                 if (status) {
 692                                         /* failure, put on abort scsi list */
 693                                         psb->exch_busy = 1;
 694                                 } else {
 695                                         /* success, put on SCSI buffer list */
 696                                         psb->exch_busy = 0;
 697                                         psb->status = IOSTAT_SUCCESS;
 698                                         num_posted++;
 699                                 }
 700                                 /* success, put on SCSI buffer sgl list */
 701                                 list_add_tail(&psb->list, &scsi_sblist);
 702                         }
 703                 }
 704
 705                 /* continue until a nembed page worth of sgls */
 706                 if (post_cnt == 0)
 707                         continue;
 708
 709                 /* post block of SCSI buffer list sgls */
 710                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 711                                                        post_cnt);
 712
 713                 /* don't reset xirtag due to hole in xri block */
 714                 if (block_cnt == 0)
 715                         last_xritag = NO_XRI;
 716
 717                 /* reset SCSI buffer post count for next round of posting */
 718                 post_cnt = 0;
 719
 720                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 721                 while (!list_empty(&blck_sblist)) {
 722                         list_remove_head(&blck_sblist, psb,
 723                                          struct lpfc_scsi_buf, list);
 724                         if (status) {
 725                                 /* failure, put on abort scsi list */
 726                                 psb->exch_busy = 1;
 727                         } else {
 728                                 /* success, put on SCSI buffer list */
 729                                 psb->exch_busy = 0;
 730                                 psb->status = IOSTAT_SUCCESS;
 731                                 num_posted++;
 732                         }
 733                         list_add_tail(&psb->list, &scsi_sblist);
 734                 }
 735         }
 736         /* Push SCSI buffers with sgl posted to the availble list */
 737         while (!list_empty(&scsi_sblist)) {
 738                 list_remove_head(&scsi_sblist, psb,
 739                                  struct lpfc_scsi_buf, list);
 740                 lpfc_release_scsi_buf_s4(phba, psb);
 741         }
 742         return num_posted;
 743 }
 744
 745 /**
 746  * lpfc_sli4_repost_scsi_sgl_list - Repost all the allocated scsi buffer sgls
 747  * @phba: pointer to lpfc hba data structure.
 748  *
 749  * This routine walks the list of scsi buffers that have been allocated and
 750  * repost them to the port by using SGL block post. This is needed after a
 751  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 752  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 753  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 754  *
 755  * Returns: 0 = success, non-zero failure.
 756  **/
 757 int
 758 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 759 {
 760         LIST_HEAD(post_sblist);
 761         int num_posted, rc = 0;
 762
 763         /* get all SCSI buffers need to repost to a local list */
 764         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 765         spin_lock(&phba->scsi_buf_list_put_lock);
 766         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 767         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 768         spin_unlock(&phba->scsi_buf_list_put_lock);
 769         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 770
 771         /* post the list of scsi buffer sgls to port if available */
 772         if (!list_empty(&post_sblist)) {
 773                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 774                                                 phba->sli4_hba.scsi_xri_cnt);
 775                 /* failed to post any scsi buffer, return error */
 776                 if (num_posted == 0)
 777                         rc = -EIO;
 778         }
 779         return rc;
 780 }
 781
 782 /**
 783  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 784  * @vport: The virtual port for which this call being executed.
 785  * @num_to_allocate: The requested number of buffers to allocate.
 786  *
 787  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 788  * the scsi buffer contains all the necessary information needed to initiate
 789  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 790  * them on a list, it post them to the port by using SGL block post.
 791  *
 792  * Return codes:
 793  *   int - number of scsi buffers that were allocated and posted.
 794  *   0 = failure, less than num_to_alloc is a partial failure.
 795  **/
 796 static int
 797 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 798 {
 799         struct lpfc_hba *phba = vport->phba;
 800         struct lpfc_scsi_buf *psb;
 801         struct sli4_sge *sgl;
 802         IOCB_t *iocb;
 803         dma_addr_t pdma_phys_fcp_cmd;
 804         dma_addr_t pdma_phys_fcp_rsp;
 805         dma_addr_t pdma_phys_bpl;
 806         uint16_t iotag, lxri = 0;
 807         int bcnt, num_posted, sgl_size;
 808         LIST_HEAD(prep_sblist);
 809         LIST_HEAD(post_sblist);
 810         LIST_HEAD(scsi_sblist);
 811
 812         sgl_size = phba->cfg_sg_dma_buf_size -
 813                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 814
 815         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 816                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 817                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 818                          (int)sizeof(struct fcp_cmnd),
 819                          (int)sizeof(struct fcp_rsp));
 820
 821         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 822                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 823                 if (!psb)
 824                         break;
 825                 /*
 826                  * Get memory from the pci pool to map the virt space to
 827                  * pci bus space for an I/O. The DMA buffer includes space
 828                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 829                  * of bde's necessary to support the sg_tablesize.
 830                  */
 831                 psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
 832                                                 GFP_KERNEL, &psb->dma_handle);
 833                 if (!psb->data) {
 834                         kfree(psb);
 835                         break;
 836                 }
 837
 838                 /*
 839                  * 4K Page alignment is CRITICAL to BlockGuard, double check
 840                  * to be sure.
 841                  */
 842                 if ((phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
 843                     (((unsigned long)(psb->data) &
 844                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
 845                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 846                                         "3369 Memory alignment error "
 847                                         "addr=%lx\n",
 848                                         (unsigned long)psb->data);
 849                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 850                                       psb->data, psb->dma_handle);
 851                         kfree(psb);
 852                         break;
 853                 }
 854
 855
 856                 lxri = lpfc_sli4_next_xritag(phba);
 857                 if (lxri == NO_XRI) {
 858                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 859                                       psb->data, psb->dma_handle);
 860                         kfree(psb);
 861                         break;
 862                 }
 863
 864                 /* Allocate iotag for psb->cur_iocbq. */
 865                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 866                 if (iotag == 0) {
 867                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
 868                                       psb->data, psb->dma_handle);
 869                         kfree(psb);
 870                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 871                                         "3368 Failed to allocate IOTAG for"
 872                                         " XRI:0x%x\n", lxri);
 873                         lpfc_sli4_free_xri(phba, lxri);
 874                         break;
 875                 }
 876                 psb->cur_iocbq.sli4_lxritag = lxri;
 877                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 878                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 879                 psb->fcp_bpl = psb->data;
 880                 psb->fcp_cmnd = (psb->data + sgl_size);
 881                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 882                                         sizeof(struct fcp_cmnd));
 883
 884                 /* Initialize local short-hand pointers. */
 885                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 886                 pdma_phys_bpl = psb->dma_handle;
 887                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
 888                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 889
 890                 /*
 891                  * The first two bdes are the FCP_CMD and FCP_RSP.
 892                  * The balance are sg list bdes. Initialize the
 893                  * first two and leave the rest for queuecommand.
 894                  */
 895                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 896                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 897                 sgl->word2 = le32_to_cpu(sgl->word2);
 898                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 899                 sgl->word2 = cpu_to_le32(sgl->word2);
 900                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 901                 sgl++;
 902
 903                 /* Setup the physical region for the FCP RSP */
 904                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 905                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 906                 sgl->word2 = le32_to_cpu(sgl->word2);
 907                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 908                 sgl->word2 = cpu_to_le32(sgl->word2);
 909                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 910
 911                 /*
 912                  * Since the IOCB for the FCP I/O is built into this
 913                  * lpfc_scsi_buf, initialize it with all known data now.
 914                  */
 915                 iocb = &psb->cur_iocbq.iocb;
 916                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 917                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 918                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
 919                  * We are setting the bpl to point to out sgl. An sgl's
 920                  * entries are 16 bytes, a bpl entries are 12 bytes.
 921                  */
 922                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 923                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 924                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 925                 iocb->ulpBdeCount = 1;
 926                 iocb->ulpLe = 1;
 927                 iocb->ulpClass = CLASS3;
 928                 psb->cur_iocbq.context1 = psb;
 929                 psb->dma_phys_bpl = pdma_phys_bpl;
 930
 931                 /* add the scsi buffer to a post list */
 932                 list_add_tail(&psb->list, &post_sblist);
 933                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
 934                 phba->sli4_hba.scsi_xri_cnt++;
 935                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 936         }
 937         lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP,
 938                         "3021 Allocate %d out of %d requested new SCSI "
 939                         "buffers\n", bcnt, num_to_alloc);
 940
 941         /* post the list of scsi buffer sgls to port if available */
 942         if (!list_empty(&post_sblist))
 943                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
 944                                                           &post_sblist, bcnt);
 945         else
 946                 num_posted = 0;
 947
 948         return num_posted;
 949 }
 950
 951 /**
 952  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 953  * @vport: The virtual port for which this call being executed.
 954  * @num_to_allocate: The requested number of buffers to allocate.
 955  *
 956  * This routine wraps the actual SCSI buffer allocator function pointer from
 957  * the lpfc_hba struct.
 958  *
 959  * Return codes:
 960  *   int - number of scsi buffers that were allocated.
 961  *   0 = failure, less than num_to_alloc is a partial failure.
 962  **/
 963 static inline int
 964 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
 965 {
 966         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
 967 }
 968
 969 /**
 970  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 971  * @phba: The HBA for which this call is being executed.
 972  *
 973  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 974  * and returns to caller.
 975  *
 976  * Return codes:
 977  *   NULL - Error
 978  *   Pointer to lpfc_scsi_buf - Success
 979  **/
 980 static struct lpfc_scsi_buf*
 981 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 982 {
 983         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 984         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
 985         unsigned long iflag = 0;
 986
 987         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
 988         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
 989                          list);
 990         if (!lpfc_cmd) {
 991                 spin_lock(&phba->scsi_buf_list_put_lock);
 992                 list_splice(&phba->lpfc_scsi_buf_list_put,
 993                             &phba->lpfc_scsi_buf_list_get);
 994                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
 995                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
 996                                  struct lpfc_scsi_buf, list);
 997                 spin_unlock(&phba->scsi_buf_list_put_lock);
 998         }
 999         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1000
1001         if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
1002                 atomic_inc(&ndlp->cmd_pending);
1003                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
1004         }
1005         return  lpfc_cmd;
1006 }
1007 /**
1008  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1009  * @phba: The HBA for which this call is being executed.
1010  *
1011  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1012  * and returns to caller.
1013  *
1014  * Return codes:
1015  *   NULL - Error
1016  *   Pointer to lpfc_scsi_buf - Success
1017  **/
1018 static struct lpfc_scsi_buf*
1019 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1020 {
1021         struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1022         unsigned long iflag = 0;
1023         int found = 0;
1024
1025         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1026         list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1027                                  &phba->lpfc_scsi_buf_list_get, list) {
1028                 if (lpfc_test_rrq_active(phba, ndlp,
1029                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1030                         continue;
1031                 list_del_init(&lpfc_cmd->list);
1032                 found = 1;
1033                 break;
1034         }
1035         if (!found) {
1036                 spin_lock(&phba->scsi_buf_list_put_lock);
1037                 list_splice(&phba->lpfc_scsi_buf_list_put,
1038                             &phba->lpfc_scsi_buf_list_get);
1039                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1040                 spin_unlock(&phba->scsi_buf_list_put_lock);
1041                 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1042                                          &phba->lpfc_scsi_buf_list_get, list) {
1043                         if (lpfc_test_rrq_active(
1044                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1045                                 continue;
1046                         list_del_init(&lpfc_cmd->list);
1047                         found = 1;
1048                         break;
1049                 }
1050         }
1051         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1052         if (!found)
1053                 return NULL;
1054
1055         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1056                 atomic_inc(&ndlp->cmd_pending);
1057                 lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
1058         }
1059         return  lpfc_cmd;
1060 }
1061 /**
1062  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1063  * @phba: The HBA for which this call is being executed.
1064  *
1065  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1066  * and returns to caller.
1067  *
1068  * Return codes:
1069  *   NULL - Error
1070  *   Pointer to lpfc_scsi_buf - Success
1071  **/
1072 static struct lpfc_scsi_buf*
1073 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1074 {
1075         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1076 }
1077
1078 /**
1079  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1080  * @phba: The Hba for which this call is being executed.
1081  * @psb: The scsi buffer which is being released.
1082  *
1083  * This routine releases @psb scsi buffer by adding it to tail of @phba
1084  * lpfc_scsi_buf_list list.
1085  **/
1086 static void
1087 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1088 {
1089         unsigned long iflag = 0;
1090
1091         psb->seg_cnt = 0;
1092         psb->nonsg_phys = 0;
1093         psb->prot_seg_cnt = 0;
1094
1095         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1096         psb->pCmd = NULL;
1097         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1098         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1099         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1100 }
1101
1102 /**
1103  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1104  * @phba: The Hba for which this call is being executed.
1105  * @psb: The scsi buffer which is being released.
1106  *
1107  * This routine releases @psb scsi buffer by adding it to tail of @phba
1108  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1109  * and cannot be reused for at least RA_TOV amount of time if it was
1110  * aborted.
1111  **/
1112 static void
1113 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1114 {
1115         unsigned long iflag = 0;
1116
1117         psb->seg_cnt = 0;
1118         psb->nonsg_phys = 0;
1119         psb->prot_seg_cnt = 0;
1120
1121         if (psb->exch_busy) {
1122                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1123                                         iflag);
1124                 psb->pCmd = NULL;
1125                 list_add_tail(&psb->list,
1126                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1127                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1128                                         iflag);
1129         } else {
1130                 psb->pCmd = NULL;
1131                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1132                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1133                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1134                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1135         }
1136 }
1137
1138 /**
1139  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1140  * @phba: The Hba for which this call is being executed.
1141  * @psb: The scsi buffer which is being released.
1142  *
1143  * This routine releases @psb scsi buffer by adding it to tail of @phba
1144  * lpfc_scsi_buf_list list.
1145  **/
1146 static void
1147 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1148 {
1149         if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
1150                 atomic_dec(&psb->ndlp->cmd_pending);
1151
1152         psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
1153         phba->lpfc_release_scsi_buf(phba, psb);
1154 }
1155
1156 /**
1157  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1158  * @phba: The Hba for which this call is being executed.
1159  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1160  *
1161  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1162  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1163  * through sg elements and format the bde. This routine also initializes all
1164  * IOCB fields which are dependent on scsi command request buffer.
1165  *
1166  * Return codes:
1167  *   1 - Error
1168  *   0 - Success
1169  **/
1170 static int
1171 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1172 {
1173         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1174         struct scatterlist *sgel = NULL;
1175         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1176         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1177         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1178         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1179         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1180         dma_addr_t physaddr;
1181         uint32_t num_bde = 0;
1182         int nseg, datadir = scsi_cmnd->sc_data_direction;
1183
1184         /*
1185          * There are three possibilities here - use scatter-gather segment, use
1186          * the single mapping, or neither.  Start the lpfc command prep by
1187          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1188          * data bde entry.
1189          */
1190         bpl += 2;
1191         if (scsi_sg_count(scsi_cmnd)) {
1192                 /*
1193                  * The driver stores the segment count returned from pci_map_sg
1194                  * because this a count of dma-mappings used to map the use_sg
1195                  * pages.  They are not guaranteed to be the same for those
1196                  * architectures that implement an IOMMU.
1197                  */
1198
1199                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1200                                   scsi_sg_count(scsi_cmnd), datadir);
1201                 if (unlikely(!nseg))
1202                         return 1;
1203
1204                 lpfc_cmd->seg_cnt = nseg;
1205                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1206                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1207                                 "9064 BLKGRD: %s: Too many sg segments from "
1208                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1209                                __func__, phba->cfg_sg_seg_cnt,
1210                                lpfc_cmd->seg_cnt);
1211                         lpfc_cmd->seg_cnt = 0;
1212                         scsi_dma_unmap(scsi_cmnd);
1213                         return 1;
1214                 }
1215
1216                 /*
1217                  * The driver established a maximum scatter-gather segment count
1218                  * during probe that limits the number of sg elements in any
1219                  * single scsi command.  Just run through the seg_cnt and format
1220                  * the bde's.
1221                  * When using SLI-3 the driver will try to fit all the BDEs into
1222                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1223                  * does for SLI-2 mode.
1224                  */
1225                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1226                         physaddr = sg_dma_address(sgel);
1227                         if (phba->sli_rev == 3 &&
1228                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1229                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1230                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1231                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1232                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1233                                 data_bde->addrLow = putPaddrLow(physaddr);
1234                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1235                                 data_bde++;
1236                         } else {
1237                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1238                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1239                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1240                                 bpl->addrLow =
1241                                         le32_to_cpu(putPaddrLow(physaddr));
1242                                 bpl->addrHigh =
1243                                         le32_to_cpu(putPaddrHigh(physaddr));
1244                                 bpl++;
1245                         }
1246                 }
1247         }
1248
1249         /*
1250          * Finish initializing those IOCB fields that are dependent on the
1251          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1252          * explicitly reinitialized and for SLI-3 the extended bde count is
1253          * explicitly reinitialized since all iocb memory resources are reused.
1254          */
1255         if (phba->sli_rev == 3 &&
1256             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1257             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1258                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1259                         /*
1260                          * The extended IOCB format can only fit 3 BDE or a BPL.
1261                          * This I/O has more than 3 BDE so the 1st data bde will
1262                          * be a BPL that is filled in here.
1263                          */
1264                         physaddr = lpfc_cmd->dma_handle;
1265                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1266                         data_bde->tus.f.bdeSize = (num_bde *
1267                                                    sizeof(struct ulp_bde64));
1268                         physaddr += (sizeof(struct fcp_cmnd) +
1269                                      sizeof(struct fcp_rsp) +
1270                                      (2 * sizeof(struct ulp_bde64)));
1271                         data_bde->addrHigh = putPaddrHigh(physaddr);
1272                         data_bde->addrLow = putPaddrLow(physaddr);
1273                         /* ebde count includes the response bde and data bpl */
1274                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1275                 } else {
1276                         /* ebde count includes the response bde and data bdes */
1277                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1278                 }
1279         } else {
1280                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1281                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1282                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1283         }
1284         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1285
1286         /*
1287          * Due to difference in data length between DIF/non-DIF paths,
1288          * we need to set word 4 of IOCB here
1289          */
1290         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1291         return 0;
1292 }
1293
1294 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1295
1296 /* Return BG_ERR_INIT if error injection is detected by Initiator */
1297 #define BG_ERR_INIT     0x1
1298 /* Return BG_ERR_TGT if error injection is detected by Target */
1299 #define BG_ERR_TGT      0x2
1300 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1301 #define BG_ERR_SWAP     0x10
1302 /**
1303  * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
1304  * error injection
1305  **/
1306 #define BG_ERR_CHECK    0x20
1307
1308 /**
1309  * lpfc_bg_err_inject - Determine if we should inject an error
1310  * @phba: The Hba for which this call is being executed.
1311  * @sc: The SCSI command to examine
1312  * @reftag: (out) BlockGuard reference tag for transmitted data
1313  * @apptag: (out) BlockGuard application tag for transmitted data
1314  * @new_guard (in) Value to replace CRC with if needed
1315  *
1316  * Returns BG_ERR_* bit mask or 0 if request ignored
1317  **/
1318 static int
1319 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1320                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1321 {
1322         struct scatterlist *sgpe; /* s/g prot entry */
1323         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1324         struct scsi_dif_tuple *src = NULL;
1325         struct lpfc_nodelist *ndlp;
1326         struct lpfc_rport_data *rdata;
1327         uint32_t op = scsi_get_prot_op(sc);
1328         uint32_t blksize;
1329         uint32_t numblks;
1330         sector_t lba;
1331         int rc = 0;
1332         int blockoff = 0;
1333
1334         if (op == SCSI_PROT_NORMAL)
1335                 return 0;
1336
1337         sgpe = scsi_prot_sglist(sc);
1338         lba = scsi_get_lba(sc);
1339
1340         /* First check if we need to match the LBA */
1341         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1342                 blksize = lpfc_cmd_blksize(sc);
1343                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1344
1345                 /* Make sure we have the right LBA if one is specified */
1346                 if ((phba->lpfc_injerr_lba < lba) ||
1347                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1348                         return 0;
1349                 if (sgpe) {
1350                         blockoff = phba->lpfc_injerr_lba - lba;
1351                         numblks = sg_dma_len(sgpe) /
1352                                 sizeof(struct scsi_dif_tuple);
1353                         if (numblks < blockoff)
1354                                 blockoff = numblks;
1355                 }
1356         }
1357
1358         /* Next check if we need to match the remote NPortID or WWPN */
1359         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1360         if (rdata && rdata->pnode) {
1361                 ndlp = rdata->pnode;
1362
1363                 /* Make sure we have the right NPortID if one is specified */
1364                 if (phba->lpfc_injerr_nportid  &&
1365                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1366                         return 0;
1367
1368                 /*
1369                  * Make sure we have the right WWPN if one is specified.
1370                  * wwn[0] should be a non-zero NAA in a good WWPN.
1371                  */
1372                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1373                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1374                                 sizeof(struct lpfc_name)) != 0))
1375                         return 0;
1376         }
1377
1378         /* Setup a ptr to the protection data if the SCSI host provides it */
1379         if (sgpe) {
1380                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1381                 src += blockoff;
1382                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1383         }
1384
1385         /* Should we change the Reference Tag */
1386         if (reftag) {
1387                 if (phba->lpfc_injerr_wref_cnt) {
1388                         switch (op) {
1389                         case SCSI_PROT_WRITE_PASS:
1390                                 if (src) {
1391                                         /*
1392                                          * For WRITE_PASS, force the error
1393                                          * to be sent on the wire. It should
1394                                          * be detected by the Target.
1395                                          * If blockoff != 0 error will be
1396                                          * inserted in middle of the IO.
1397                                          */
1398
1399                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1400                                         "9076 BLKGRD: Injecting reftag error: "
1401                                         "write lba x%lx + x%x oldrefTag x%x\n",
1402                                         (unsigned long)lba, blockoff,
1403                                         be32_to_cpu(src->ref_tag));
1404
1405                                         /*
1406                                          * Save the old ref_tag so we can
1407                                          * restore it on completion.
1408                                          */
1409                                         if (lpfc_cmd) {
1410                                                 lpfc_cmd->prot_data_type =
1411                                                         LPFC_INJERR_REFTAG;
1412                                                 lpfc_cmd->prot_data_segment =
1413                                                         src;
1414                                                 lpfc_cmd->prot_data =
1415                                                         src->ref_tag;
1416                                         }
1417                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1418                                         phba->lpfc_injerr_wref_cnt--;
1419                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1420                                                 phba->lpfc_injerr_nportid = 0;
1421                                                 phba->lpfc_injerr_lba =
1422                                                         LPFC_INJERR_LBA_OFF;
1423                                                 memset(&phba->lpfc_injerr_wwpn,
1424                                                   0, sizeof(struct lpfc_name));
1425                                         }
1426                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1427
1428                                         break;
1429                                 }
1430                                 /* Drop thru */
1431                         case SCSI_PROT_WRITE_INSERT:
1432                                 /*
1433                                  * For WRITE_INSERT, force the error
1434                                  * to be sent on the wire. It should be
1435                                  * detected by the Target.
1436                                  */
1437                                 /* DEADBEEF will be the reftag on the wire */
1438                                 *reftag = 0xDEADBEEF;
1439                                 phba->lpfc_injerr_wref_cnt--;
1440                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1441                                         phba->lpfc_injerr_nportid = 0;
1442                                         phba->lpfc_injerr_lba =
1443                                         LPFC_INJERR_LBA_OFF;
1444                                         memset(&phba->lpfc_injerr_wwpn,
1445                                                 0, sizeof(struct lpfc_name));
1446                                 }
1447                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1448
1449                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1450                                         "9078 BLKGRD: Injecting reftag error: "
1451                                         "write lba x%lx\n", (unsigned long)lba);
1452                                 break;
1453                         case SCSI_PROT_WRITE_STRIP:
1454                                 /*
1455                                  * For WRITE_STRIP and WRITE_PASS,
1456                                  * force the error on data
1457                                  * being copied from SLI-Host to SLI-Port.
1458                                  */
1459                                 *reftag = 0xDEADBEEF;
1460                                 phba->lpfc_injerr_wref_cnt--;
1461                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1462                                         phba->lpfc_injerr_nportid = 0;
1463                                         phba->lpfc_injerr_lba =
1464                                                 LPFC_INJERR_LBA_OFF;
1465                                         memset(&phba->lpfc_injerr_wwpn,
1466                                                 0, sizeof(struct lpfc_name));
1467                                 }
1468                                 rc = BG_ERR_INIT;
1469
1470                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1471                                         "9077 BLKGRD: Injecting reftag error: "
1472                                         "write lba x%lx\n", (unsigned long)lba);
1473                                 break;
1474                         }
1475                 }
1476                 if (phba->lpfc_injerr_rref_cnt) {
1477                         switch (op) {
1478                         case SCSI_PROT_READ_INSERT:
1479                         case SCSI_PROT_READ_STRIP:
1480                         case SCSI_PROT_READ_PASS:
1481                                 /*
1482                                  * For READ_STRIP and READ_PASS, force the
1483                                  * error on data being read off the wire. It
1484                                  * should force an IO error to the driver.
1485                                  */
1486                                 *reftag = 0xDEADBEEF;
1487                                 phba->lpfc_injerr_rref_cnt--;
1488                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1489                                         phba->lpfc_injerr_nportid = 0;
1490                                         phba->lpfc_injerr_lba =
1491                                                 LPFC_INJERR_LBA_OFF;
1492                                         memset(&phba->lpfc_injerr_wwpn,
1493                                                 0, sizeof(struct lpfc_name));
1494                                 }
1495                                 rc = BG_ERR_INIT;
1496
1497                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1498                                         "9079 BLKGRD: Injecting reftag error: "
1499                                         "read lba x%lx\n", (unsigned long)lba);
1500                                 break;
1501                         }
1502                 }
1503         }
1504
1505         /* Should we change the Application Tag */
1506         if (apptag) {
1507                 if (phba->lpfc_injerr_wapp_cnt) {
1508                         switch (op) {
1509                         case SCSI_PROT_WRITE_PASS:
1510                                 if (src) {
1511                                         /*
1512                                          * For WRITE_PASS, force the error
1513                                          * to be sent on the wire. It should
1514                                          * be detected by the Target.
1515                                          * If blockoff != 0 error will be
1516                                          * inserted in middle of the IO.
1517                                          */
1518
1519                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1520                                         "9080 BLKGRD: Injecting apptag error: "
1521                                         "write lba x%lx + x%x oldappTag x%x\n",
1522                                         (unsigned long)lba, blockoff,
1523                                         be16_to_cpu(src->app_tag));
1524
1525                                         /*
1526                                          * Save the old app_tag so we can
1527                                          * restore it on completion.
1528                                          */
1529                                         if (lpfc_cmd) {
1530                                                 lpfc_cmd->prot_data_type =
1531                                                         LPFC_INJERR_APPTAG;
1532                                                 lpfc_cmd->prot_data_segment =
1533                                                         src;
1534                                                 lpfc_cmd->prot_data =
1535                                                         src->app_tag;
1536                                         }
1537                                         src->app_tag = cpu_to_be16(0xDEAD);
1538                                         phba->lpfc_injerr_wapp_cnt--;
1539                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1540                                                 phba->lpfc_injerr_nportid = 0;
1541                                                 phba->lpfc_injerr_lba =
1542                                                         LPFC_INJERR_LBA_OFF;
1543                                                 memset(&phba->lpfc_injerr_wwpn,
1544                                                   0, sizeof(struct lpfc_name));
1545                                         }
1546                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1547                                         break;
1548                                 }
1549                                 /* Drop thru */
1550                         case SCSI_PROT_WRITE_INSERT:
1551                                 /*
1552                                  * For WRITE_INSERT, force the
1553                                  * error to be sent on the wire. It should be
1554                                  * detected by the Target.
1555                                  */
1556                                 /* DEAD will be the apptag on the wire */
1557                                 *apptag = 0xDEAD;
1558                                 phba->lpfc_injerr_wapp_cnt--;
1559                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1560                                         phba->lpfc_injerr_nportid = 0;
1561                                         phba->lpfc_injerr_lba =
1562                                                 LPFC_INJERR_LBA_OFF;
1563                                         memset(&phba->lpfc_injerr_wwpn,
1564                                                 0, sizeof(struct lpfc_name));
1565                                 }
1566                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1567
1568                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1569                                         "0813 BLKGRD: Injecting apptag error: "
1570                                         "write lba x%lx\n", (unsigned long)lba);
1571                                 break;
1572                         case SCSI_PROT_WRITE_STRIP:
1573                                 /*
1574                                  * For WRITE_STRIP and WRITE_PASS,
1575                                  * force the error on data
1576                                  * being copied from SLI-Host to SLI-Port.
1577                                  */
1578                                 *apptag = 0xDEAD;
1579                                 phba->lpfc_injerr_wapp_cnt--;
1580                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1581                                         phba->lpfc_injerr_nportid = 0;
1582                                         phba->lpfc_injerr_lba =
1583                                                 LPFC_INJERR_LBA_OFF;
1584                                         memset(&phba->lpfc_injerr_wwpn,
1585                                                 0, sizeof(struct lpfc_name));
1586                                 }
1587                                 rc = BG_ERR_INIT;
1588
1589                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1590                                         "0812 BLKGRD: Injecting apptag error: "
1591                                         "write lba x%lx\n", (unsigned long)lba);
1592                                 break;
1593                         }
1594                 }
1595                 if (phba->lpfc_injerr_rapp_cnt) {
1596                         switch (op) {
1597                         case SCSI_PROT_READ_INSERT:
1598                         case SCSI_PROT_READ_STRIP:
1599                         case SCSI_PROT_READ_PASS:
1600                                 /*
1601                                  * For READ_STRIP and READ_PASS, force the
1602                                  * error on data being read off the wire. It
1603                                  * should force an IO error to the driver.
1604                                  */
1605                                 *apptag = 0xDEAD;
1606                                 phba->lpfc_injerr_rapp_cnt--;
1607                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1608                                         phba->lpfc_injerr_nportid = 0;
1609                                         phba->lpfc_injerr_lba =
1610                                                 LPFC_INJERR_LBA_OFF;
1611                                         memset(&phba->lpfc_injerr_wwpn,
1612                                                 0, sizeof(struct lpfc_name));
1613                                 }
1614                                 rc = BG_ERR_INIT;
1615
1616                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1617                                         "0814 BLKGRD: Injecting apptag error: "
1618                                         "read lba x%lx\n", (unsigned long)lba);
1619                                 break;
1620                         }
1621                 }
1622         }
1623
1624
1625         /* Should we change the Guard Tag */
1626         if (new_guard) {
1627                 if (phba->lpfc_injerr_wgrd_cnt) {
1628                         switch (op) {
1629                         case SCSI_PROT_WRITE_PASS:
1630                                 rc = BG_ERR_CHECK;
1631                                 /* Drop thru */
1632
1633                         case SCSI_PROT_WRITE_INSERT:
1634                                 /*
1635                                  * For WRITE_INSERT, force the
1636                                  * error to be sent on the wire. It should be
1637                                  * detected by the Target.
1638                                  */
1639                                 phba->lpfc_injerr_wgrd_cnt--;
1640                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1641                                         phba->lpfc_injerr_nportid = 0;
1642                                         phba->lpfc_injerr_lba =
1643                                                 LPFC_INJERR_LBA_OFF;
1644                                         memset(&phba->lpfc_injerr_wwpn,
1645                                                 0, sizeof(struct lpfc_name));
1646                                 }
1647
1648                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1649                                 /* Signals the caller to swap CRC->CSUM */
1650
1651                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1652                                         "0817 BLKGRD: Injecting guard error: "
1653                                         "write lba x%lx\n", (unsigned long)lba);
1654                                 break;
1655                         case SCSI_PROT_WRITE_STRIP:
1656                                 /*
1657                                  * For WRITE_STRIP and WRITE_PASS,
1658                                  * force the error on data
1659                                  * being copied from SLI-Host to SLI-Port.
1660                                  */
1661                                 phba->lpfc_injerr_wgrd_cnt--;
1662                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1663                                         phba->lpfc_injerr_nportid = 0;
1664                                         phba->lpfc_injerr_lba =
1665                                                 LPFC_INJERR_LBA_OFF;
1666                                         memset(&phba->lpfc_injerr_wwpn,
1667                                                 0, sizeof(struct lpfc_name));
1668                                 }
1669
1670                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1671                                 /* Signals the caller to swap CRC->CSUM */
1672
1673                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1674                                         "0816 BLKGRD: Injecting guard error: "
1675                                         "write lba x%lx\n", (unsigned long)lba);
1676                                 break;
1677                         }
1678                 }
1679                 if (phba->lpfc_injerr_rgrd_cnt) {
1680                         switch (op) {
1681                         case SCSI_PROT_READ_INSERT:
1682                         case SCSI_PROT_READ_STRIP:
1683                         case SCSI_PROT_READ_PASS:
1684                                 /*
1685                                  * For READ_STRIP and READ_PASS, force the
1686                                  * error on data being read off the wire. It
1687                                  * should force an IO error to the driver.
1688                                  */
1689                                 phba->lpfc_injerr_rgrd_cnt--;
1690                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1691                                         phba->lpfc_injerr_nportid = 0;
1692                                         phba->lpfc_injerr_lba =
1693                                                 LPFC_INJERR_LBA_OFF;
1694                                         memset(&phba->lpfc_injerr_wwpn,
1695                                                 0, sizeof(struct lpfc_name));
1696                                 }
1697
1698                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1699                                 /* Signals the caller to swap CRC->CSUM */
1700
1701                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1702                                         "0818 BLKGRD: Injecting guard error: "
1703                                         "read lba x%lx\n", (unsigned long)lba);
1704                         }
1705                 }
1706         }
1707
1708         return rc;
1709 }
1710 #endif
1711
1712 /**
1713  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1714  * the specified SCSI command.
1715  * @phba: The Hba for which this call is being executed.
1716  * @sc: The SCSI command to examine
1717  * @txopt: (out) BlockGuard operation for transmitted data
1718  * @rxopt: (out) BlockGuard operation for received data
1719  *
1720  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1721  *
1722  **/
1723 static int
1724 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1725                 uint8_t *txop, uint8_t *rxop)
1726 {
1727         uint8_t ret = 0;
1728
1729         if (lpfc_cmd_guard_csum(sc)) {
1730                 switch (scsi_get_prot_op(sc)) {
1731                 case SCSI_PROT_READ_INSERT:
1732                 case SCSI_PROT_WRITE_STRIP:
1733                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1734                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1735                         break;
1736
1737                 case SCSI_PROT_READ_STRIP:
1738                 case SCSI_PROT_WRITE_INSERT:
1739                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1740                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1741                         break;
1742
1743                 case SCSI_PROT_READ_PASS:
1744                 case SCSI_PROT_WRITE_PASS:
1745                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1746                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1747                         break;
1748
1749                 case SCSI_PROT_NORMAL:
1750                 default:
1751                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1752                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1753                                         scsi_get_prot_op(sc));
1754                         ret = 1;
1755                         break;
1756
1757                 }
1758         } else {
1759                 switch (scsi_get_prot_op(sc)) {
1760                 case SCSI_PROT_READ_STRIP:
1761                 case SCSI_PROT_WRITE_INSERT:
1762                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1763                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1764                         break;
1765
1766                 case SCSI_PROT_READ_PASS:
1767                 case SCSI_PROT_WRITE_PASS:
1768                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1769                         *txop = BG_OP_IN_CRC_OUT_CRC;
1770                         break;
1771
1772                 case SCSI_PROT_READ_INSERT:
1773                 case SCSI_PROT_WRITE_STRIP:
1774                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1775                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1776                         break;
1777
1778                 case SCSI_PROT_NORMAL:
1779                 default:
1780                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1781                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1782                                         scsi_get_prot_op(sc));
1783                         ret = 1;
1784                         break;
1785                 }
1786         }
1787
1788         return ret;
1789 }
1790
1791 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1792 /**
1793  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1794  * the specified SCSI command in order to force a guard tag error.
1795  * @phba: The Hba for which this call is being executed.
1796  * @sc: The SCSI command to examine
1797  * @txopt: (out) BlockGuard operation for transmitted data
1798  * @rxopt: (out) BlockGuard operation for received data
1799  *
1800  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1801  *
1802  **/
1803 static int
1804 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1805                 uint8_t *txop, uint8_t *rxop)
1806 {
1807         uint8_t ret = 0;
1808
1809         if (lpfc_cmd_guard_csum(sc)) {
1810                 switch (scsi_get_prot_op(sc)) {
1811                 case SCSI_PROT_READ_INSERT:
1812                 case SCSI_PROT_WRITE_STRIP:
1813                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1814                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1815                         break;
1816
1817                 case SCSI_PROT_READ_STRIP:
1818                 case SCSI_PROT_WRITE_INSERT:
1819                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1820                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1821                         break;
1822
1823                 case SCSI_PROT_READ_PASS:
1824                 case SCSI_PROT_WRITE_PASS:
1825                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1826                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1827                         break;
1828
1829                 case SCSI_PROT_NORMAL:
1830                 default:
1831                         break;
1832
1833                 }
1834         } else {
1835                 switch (scsi_get_prot_op(sc)) {
1836                 case SCSI_PROT_READ_STRIP:
1837                 case SCSI_PROT_WRITE_INSERT:
1838                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1839                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1840                         break;
1841
1842                 case SCSI_PROT_READ_PASS:
1843                 case SCSI_PROT_WRITE_PASS:
1844                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1845                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1846                         break;
1847
1848                 case SCSI_PROT_READ_INSERT:
1849                 case SCSI_PROT_WRITE_STRIP:
1850                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1851                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1852                         break;
1853
1854                 case SCSI_PROT_NORMAL:
1855                 default:
1856                         break;
1857                 }
1858         }
1859
1860         return ret;
1861 }
1862 #endif
1863
1864 /**
1865  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1866  * @phba: The Hba for which this call is being executed.
1867  * @sc: pointer to scsi command we're working on
1868  * @bpl: pointer to buffer list for protection groups
1869  * @datacnt: number of segments of data that have been dma mapped
1870  *
1871  * This function sets up BPL buffer list for protection groups of
1872  * type LPFC_PG_TYPE_NO_DIF
1873  *
1874  * This is usually used when the HBA is instructed to generate
1875  * DIFs and insert them into data stream (or strip DIF from
1876  * incoming data stream)
1877  *
1878  * The buffer list consists of just one protection group described
1879  * below:
1880  *                                +-------------------------+
1881  *   start of prot group  -->     |          PDE_5          |
1882  *                                +-------------------------+
1883  *                                |          PDE_6          |
1884  *                                +-------------------------+
1885  *                                |         Data BDE        |
1886  *                                +-------------------------+
1887  *                                |more Data BDE's ... (opt)|
1888  *                                +-------------------------+
1889  *
1890  *
1891  * Note: Data s/g buffers have been dma mapped
1892  *
1893  * Returns the number of BDEs added to the BPL.
1894  **/
1895 static int
1896 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1897                 struct ulp_bde64 *bpl, int datasegcnt)
1898 {
1899         struct scatterlist *sgde = NULL; /* s/g data entry */
1900         struct lpfc_pde5 *pde5 = NULL;
1901         struct lpfc_pde6 *pde6 = NULL;
1902         dma_addr_t physaddr;
1903         int i = 0, num_bde = 0, status;
1904         int datadir = sc->sc_data_direction;
1905 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1906         uint32_t rc;
1907 #endif
1908         uint32_t checking = 1;
1909         uint32_t reftag;
1910         uint8_t txop, rxop;
1911
1912         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1913         if (status)
1914                 goto out;
1915
1916         /* extract some info from the scsi command for pde*/
1917         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1918
1919 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1920         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1921         if (rc) {
1922                 if (rc & BG_ERR_SWAP)
1923                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1924                 if (rc & BG_ERR_CHECK)
1925                         checking = 0;
1926         }
1927 #endif
1928
1929         /* setup PDE5 with what we have */
1930         pde5 = (struct lpfc_pde5 *) bpl;
1931         memset(pde5, 0, sizeof(struct lpfc_pde5));
1932         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1933
1934         /* Endianness conversion if necessary for PDE5 */
1935         pde5->word0 = cpu_to_le32(pde5->word0);
1936         pde5->reftag = cpu_to_le32(reftag);
1937
1938         /* advance bpl and increment bde count */
1939         num_bde++;
1940         bpl++;
1941         pde6 = (struct lpfc_pde6 *) bpl;
1942
1943         /* setup PDE6 with the rest of the info */
1944         memset(pde6, 0, sizeof(struct lpfc_pde6));
1945         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1946         bf_set(pde6_optx, pde6, txop);
1947         bf_set(pde6_oprx, pde6, rxop);
1948
1949         /*
1950          * We only need to check the data on READs, for WRITEs
1951          * protection data is automatically generated, not checked.
1952          */
1953         if (datadir == DMA_FROM_DEVICE) {
1954                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1955                         bf_set(pde6_ce, pde6, checking);
1956                 else
1957                         bf_set(pde6_ce, pde6, 0);
1958
1959                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1960                         bf_set(pde6_re, pde6, checking);
1961                 else
1962                         bf_set(pde6_re, pde6, 0);
1963         }
1964         bf_set(pde6_ai, pde6, 1);
1965         bf_set(pde6_ae, pde6, 0);
1966         bf_set(pde6_apptagval, pde6, 0);
1967
1968         /* Endianness conversion if necessary for PDE6 */
1969         pde6->word0 = cpu_to_le32(pde6->word0);
1970         pde6->word1 = cpu_to_le32(pde6->word1);
1971         pde6->word2 = cpu_to_le32(pde6->word2);
1972
1973         /* advance bpl and increment bde count */
1974         num_bde++;
1975         bpl++;
1976
1977         /* assumption: caller has already run dma_map_sg on command data */
1978         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1979                 physaddr = sg_dma_address(sgde);
1980                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1981                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1982                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1983                 if (datadir == DMA_TO_DEVICE)
1984                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1985                 else
1986                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1987                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1988                 bpl++;
1989                 num_bde++;
1990         }
1991
1992 out:
1993         return num_bde;
1994 }
1995
1996 /**
1997  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1998  * @phba: The Hba for which this call is being executed.
1999  * @sc: pointer to scsi command we're working on
2000  * @bpl: pointer to buffer list for protection groups
2001  * @datacnt: number of segments of data that have been dma mapped
2002  * @protcnt: number of segment of protection data that have been dma mapped
2003  *
2004  * This function sets up BPL buffer list for protection groups of
2005  * type LPFC_PG_TYPE_DIF
2006  *
2007  * This is usually used when DIFs are in their own buffers,
2008  * separate from the data. The HBA can then by instructed
2009  * to place the DIFs in the outgoing stream.  For read operations,
2010  * The HBA could extract the DIFs and place it in DIF buffers.
2011  *
2012  * The buffer list for this type consists of one or more of the
2013  * protection groups described below:
2014  *                                    +-------------------------+
2015  *   start of first prot group  -->   |          PDE_5          |
2016  *                                    +-------------------------+
2017  *                                    |          PDE_6          |
2018  *                                    +-------------------------+
2019  *                                    |      PDE_7 (Prot BDE)   |
2020  *                                    +-------------------------+
2021  *                                    |        Data BDE         |
2022  *                                    +-------------------------+
2023  *                                    |more Data BDE's ... (opt)|
2024  *                                    +-------------------------+
2025  *   start of new  prot group  -->    |          PDE_5          |
2026  *                                    +-------------------------+
2027  *                                    |          ...            |
2028  *                                    +-------------------------+
2029  *
2030  * Note: It is assumed that both data and protection s/g buffers have been
2031  *       mapped for DMA
2032  *
2033  * Returns the number of BDEs added to the BPL.
2034  **/
2035 static int
2036 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2037                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2038 {
2039         struct scatterlist *sgde = NULL; /* s/g data entry */
2040         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2041         struct lpfc_pde5 *pde5 = NULL;
2042         struct lpfc_pde6 *pde6 = NULL;
2043         struct lpfc_pde7 *pde7 = NULL;
2044         dma_addr_t dataphysaddr, protphysaddr;
2045         unsigned short curr_data = 0, curr_prot = 0;
2046         unsigned int split_offset;
2047         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2048         unsigned int protgrp_blks, protgrp_bytes;
2049         unsigned int remainder, subtotal;
2050         int status;
2051         int datadir = sc->sc_data_direction;
2052         unsigned char pgdone = 0, alldone = 0;
2053         unsigned blksize;
2054 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2055         uint32_t rc;
2056 #endif
2057         uint32_t checking = 1;
2058         uint32_t reftag;
2059         uint8_t txop, rxop;
2060         int num_bde = 0;
2061
2062         sgpe = scsi_prot_sglist(sc);
2063         sgde = scsi_sglist(sc);
2064
2065         if (!sgpe || !sgde) {
2066                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2067                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2068                                 sgpe, sgde);
2069                 return 0;
2070         }
2071
2072         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2073         if (status)
2074                 goto out;
2075
2076         /* extract some info from the scsi command */
2077         blksize = lpfc_cmd_blksize(sc);
2078         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2079
2080 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2081         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2082         if (rc) {
2083                 if (rc & BG_ERR_SWAP)
2084                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2085                 if (rc & BG_ERR_CHECK)
2086                         checking = 0;
2087         }
2088 #endif
2089
2090         split_offset = 0;
2091         do {
2092                 /* Check to see if we ran out of space */
2093                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2094                         return num_bde + 3;
2095
2096                 /* setup PDE5 with what we have */
2097                 pde5 = (struct lpfc_pde5 *) bpl;
2098                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2099                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2100
2101                 /* Endianness conversion if necessary for PDE5 */
2102                 pde5->word0 = cpu_to_le32(pde5->word0);
2103                 pde5->reftag = cpu_to_le32(reftag);
2104
2105                 /* advance bpl and increment bde count */
2106                 num_bde++;
2107                 bpl++;
2108                 pde6 = (struct lpfc_pde6 *) bpl;
2109
2110                 /* setup PDE6 with the rest of the info */
2111                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2112                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2113                 bf_set(pde6_optx, pde6, txop);
2114                 bf_set(pde6_oprx, pde6, rxop);
2115
2116                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2117                         bf_set(pde6_ce, pde6, checking);
2118                 else
2119                         bf_set(pde6_ce, pde6, 0);
2120
2121                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2122                         bf_set(pde6_re, pde6, checking);
2123                 else
2124                         bf_set(pde6_re, pde6, 0);
2125
2126                 bf_set(pde6_ai, pde6, 1);
2127                 bf_set(pde6_ae, pde6, 0);
2128                 bf_set(pde6_apptagval, pde6, 0);
2129
2130                 /* Endianness conversion if necessary for PDE6 */
2131                 pde6->word0 = cpu_to_le32(pde6->word0);
2132                 pde6->word1 = cpu_to_le32(pde6->word1);
2133                 pde6->word2 = cpu_to_le32(pde6->word2);
2134
2135                 /* advance bpl and increment bde count */
2136                 num_bde++;
2137                 bpl++;
2138
2139                 /* setup the first BDE that points to protection buffer */
2140                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2141                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2142
2143                 /* must be integer multiple of the DIF block length */
2144                 BUG_ON(protgroup_len % 8);
2145
2146                 pde7 = (struct lpfc_pde7 *) bpl;
2147                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2148                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2149
2150                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2151                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2152
2153                 protgrp_blks = protgroup_len / 8;
2154                 protgrp_bytes = protgrp_blks * blksize;
2155
2156                 /* check if this pde is crossing the 4K boundary; if so split */
2157                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2158                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2159                         protgroup_offset += protgroup_remainder;
2160                         protgrp_blks = protgroup_remainder / 8;
2161                         protgrp_bytes = protgrp_blks * blksize;
2162                 } else {
2163                         protgroup_offset = 0;
2164                         curr_prot++;
2165                 }
2166
2167                 num_bde++;
2168
2169                 /* setup BDE's for data blocks associated with DIF data */
2170                 pgdone = 0;
2171                 subtotal = 0; /* total bytes processed for current prot grp */
2172                 while (!pgdone) {
2173                         /* Check to see if we ran out of space */
2174                         if (num_bde >= phba->cfg_total_seg_cnt)
2175                                 return num_bde + 1;
2176
2177                         if (!sgde) {
2178                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2179                                         "9065 BLKGRD:%s Invalid data segment\n",
2180                                                 __func__);
2181                                 return 0;
2182                         }
2183                         bpl++;
2184                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2185                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2186                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2187
2188                         remainder = sg_dma_len(sgde) - split_offset;
2189
2190                         if ((subtotal + remainder) <= protgrp_bytes) {
2191                                 /* we can use this whole buffer */
2192                                 bpl->tus.f.bdeSize = remainder;
2193                                 split_offset = 0;
2194
2195                                 if ((subtotal + remainder) == protgrp_bytes)
2196                                         pgdone = 1;
2197                         } else {
2198                                 /* must split this buffer with next prot grp */
2199                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2200                                 split_offset += bpl->tus.f.bdeSize;
2201                         }
2202
2203                         subtotal += bpl->tus.f.bdeSize;
2204
2205                         if (datadir == DMA_TO_DEVICE)
2206                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2207                         else
2208                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2209                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2210
2211                         num_bde++;
2212                         curr_data++;
2213
2214                         if (split_offset)
2215                                 break;
2216
2217                         /* Move to the next s/g segment if possible */
2218                         sgde = sg_next(sgde);
2219
2220                 }
2221
2222                 if (protgroup_offset) {
2223                         /* update the reference tag */
2224                         reftag += protgrp_blks;
2225                         bpl++;
2226                         continue;
2227                 }
2228
2229                 /* are we done ? */
2230                 if (curr_prot == protcnt) {
2231                         alldone = 1;
2232                 } else if (curr_prot < protcnt) {
2233                         /* advance to next prot buffer */
2234                         sgpe = sg_next(sgpe);
2235                         bpl++;
2236
2237                         /* update the reference tag */
2238                         reftag += protgrp_blks;
2239                 } else {
2240                         /* if we're here, we have a bug */
2241                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2242                                 "9054 BLKGRD: bug in %s\n", __func__);
2243                 }
2244
2245         } while (!alldone);
2246 out:
2247
2248         return num_bde;
2249 }
2250
2251 /**
2252  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2253  * @phba: The Hba for which this call is being executed.
2254  * @sc: pointer to scsi command we're working on
2255  * @sgl: pointer to buffer list for protection groups
2256  * @datacnt: number of segments of data that have been dma mapped
2257  *
2258  * This function sets up SGL buffer list for protection groups of
2259  * type LPFC_PG_TYPE_NO_DIF
2260  *
2261  * This is usually used when the HBA is instructed to generate
2262  * DIFs and insert them into data stream (or strip DIF from
2263  * incoming data stream)
2264  *
2265  * The buffer list consists of just one protection group described
2266  * below:
2267  *                                +-------------------------+
2268  *   start of prot group  -->     |         DI_SEED         |
2269  *                                +-------------------------+
2270  *                                |         Data SGE        |
2271  *                                +-------------------------+
2272  *                                |more Data SGE's ... (opt)|
2273  *                                +-------------------------+
2274  *
2275  *
2276  * Note: Data s/g buffers have been dma mapped
2277  *
2278  * Returns the number of SGEs added to the SGL.
2279  **/
2280 static int
2281 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2282                 struct sli4_sge *sgl, int datasegcnt)
2283 {
2284         struct scatterlist *sgde = NULL; /* s/g data entry */
2285         struct sli4_sge_diseed *diseed = NULL;
2286         dma_addr_t physaddr;
2287         int i = 0, num_sge = 0, status;
2288         uint32_t reftag;
2289         uint8_t txop, rxop;
2290 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2291         uint32_t rc;
2292 #endif
2293         uint32_t checking = 1;
2294         uint32_t dma_len;
2295         uint32_t dma_offset = 0;
2296
2297         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2298         if (status)
2299                 goto out;
2300
2301         /* extract some info from the scsi command for pde*/
2302         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2303
2304 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2305         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2306         if (rc) {
2307                 if (rc & BG_ERR_SWAP)
2308                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2309                 if (rc & BG_ERR_CHECK)
2310                         checking = 0;
2311         }
2312 #endif
2313
2314         /* setup DISEED with what we have */
2315         diseed = (struct sli4_sge_diseed *) sgl;
2316         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2317         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2318
2319         /* Endianness conversion if necessary */
2320         diseed->ref_tag = cpu_to_le32(reftag);
2321         diseed->ref_tag_tran = diseed->ref_tag;
2322
2323         /*
2324          * We only need to check the data on READs, for WRITEs
2325          * protection data is automatically generated, not checked.
2326          */
2327         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2328                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2329                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2330                 else
2331                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2332
2333                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2334                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2335                 else
2336                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2337         }
2338
2339         /* setup DISEED with the rest of the info */
2340         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2341         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2342
2343         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2344         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2345
2346         /* Endianness conversion if necessary for DISEED */
2347         diseed->word2 = cpu_to_le32(diseed->word2);
2348         diseed->word3 = cpu_to_le32(diseed->word3);
2349
2350         /* advance bpl and increment sge count */
2351         num_sge++;
2352         sgl++;
2353
2354         /* assumption: caller has already run dma_map_sg on command data */
2355         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2356                 physaddr = sg_dma_address(sgde);
2357                 dma_len = sg_dma_len(sgde);
2358                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2359                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2360                 if ((i + 1) == datasegcnt)
2361                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2362                 else
2363                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2364                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2365                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2366
2367                 sgl->sge_len = cpu_to_le32(dma_len);
2368                 dma_offset += dma_len;
2369
2370                 sgl++;
2371                 num_sge++;
2372         }
2373
2374 out:
2375         return num_sge;
2376 }
2377
2378 /**
2379  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2380  * @phba: The Hba for which this call is being executed.
2381  * @sc: pointer to scsi command we're working on
2382  * @sgl: pointer to buffer list for protection groups
2383  * @datacnt: number of segments of data that have been dma mapped
2384  * @protcnt: number of segment of protection data that have been dma mapped
2385  *
2386  * This function sets up SGL buffer list for protection groups of
2387  * type LPFC_PG_TYPE_DIF
2388  *
2389  * This is usually used when DIFs are in their own buffers,
2390  * separate from the data. The HBA can then by instructed
2391  * to place the DIFs in the outgoing stream.  For read operations,
2392  * The HBA could extract the DIFs and place it in DIF buffers.
2393  *
2394  * The buffer list for this type consists of one or more of the
2395  * protection groups described below:
2396  *                                    +-------------------------+
2397  *   start of first prot group  -->   |         DISEED          |
2398  *                                    +-------------------------+
2399  *                                    |      DIF (Prot SGE)     |
2400  *                                    +-------------------------+
2401  *                                    |        Data SGE         |
2402  *                                    +-------------------------+
2403  *                                    |more Data SGE's ... (opt)|
2404  *                                    +-------------------------+
2405  *   start of new  prot group  -->    |         DISEED          |
2406  *                                    +-------------------------+
2407  *                                    |          ...            |
2408  *                                    +-------------------------+
2409  *
2410  * Note: It is assumed that both data and protection s/g buffers have been
2411  *       mapped for DMA
2412  *
2413  * Returns the number of SGEs added to the SGL.
2414  **/
2415 static int
2416 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2417                 struct sli4_sge *sgl, int datacnt, int protcnt)
2418 {
2419         struct scatterlist *sgde = NULL; /* s/g data entry */
2420         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2421         struct sli4_sge_diseed *diseed = NULL;
2422         dma_addr_t dataphysaddr, protphysaddr;
2423         unsigned short curr_data = 0, curr_prot = 0;
2424         unsigned int split_offset;
2425         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2426         unsigned int protgrp_blks, protgrp_bytes;
2427         unsigned int remainder, subtotal;
2428         int status;
2429         unsigned char pgdone = 0, alldone = 0;
2430         unsigned blksize;
2431         uint32_t reftag;
2432         uint8_t txop, rxop;
2433         uint32_t dma_len;
2434 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2435         uint32_t rc;
2436 #endif
2437         uint32_t checking = 1;
2438         uint32_t dma_offset = 0;
2439         int num_sge = 0;
2440
2441         sgpe = scsi_prot_sglist(sc);
2442         sgde = scsi_sglist(sc);
2443
2444         if (!sgpe || !sgde) {
2445                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2446                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2447                                 sgpe, sgde);
2448                 return 0;
2449         }
2450
2451         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2452         if (status)
2453                 goto out;
2454
2455         /* extract some info from the scsi command */
2456         blksize = lpfc_cmd_blksize(sc);
2457         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2458
2459 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2460         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2461         if (rc) {
2462                 if (rc & BG_ERR_SWAP)
2463                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2464                 if (rc & BG_ERR_CHECK)
2465                         checking = 0;
2466         }
2467 #endif
2468
2469         split_offset = 0;
2470         do {
2471                 /* Check to see if we ran out of space */
2472                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2473                         return num_sge + 3;
2474
2475                 /* setup DISEED with what we have */
2476                 diseed = (struct sli4_sge_diseed *) sgl;
2477                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2478                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2479
2480                 /* Endianness conversion if necessary */
2481                 diseed->ref_tag = cpu_to_le32(reftag);
2482                 diseed->ref_tag_tran = diseed->ref_tag;
2483
2484                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2485                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2486
2487                 } else {
2488                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2489                         /*
2490                          * When in this mode, the hardware will replace
2491                          * the guard tag from the host with a
2492                          * newly generated good CRC for the wire.
2493                          * Switch to raw mode here to avoid this
2494                          * behavior. What the host sends gets put on the wire.
2495                          */
2496                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2497                                 txop = BG_OP_RAW_MODE;
2498                                 rxop = BG_OP_RAW_MODE;
2499                         }
2500                 }
2501
2502
2503                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2504                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2505                 else
2506                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2507
2508                 /* setup DISEED with the rest of the info */
2509                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2510                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2511
2512                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2513                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2514
2515                 /* Endianness conversion if necessary for DISEED */
2516                 diseed->word2 = cpu_to_le32(diseed->word2);
2517                 diseed->word3 = cpu_to_le32(diseed->word3);
2518
2519                 /* advance sgl and increment bde count */
2520                 num_sge++;
2521                 sgl++;
2522
2523                 /* setup the first BDE that points to protection buffer */
2524                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2525                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2526
2527                 /* must be integer multiple of the DIF block length */
2528                 BUG_ON(protgroup_len % 8);
2529
2530                 /* Now setup DIF SGE */
2531                 sgl->word2 = 0;
2532                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2533                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2534                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2535                 sgl->word2 = cpu_to_le32(sgl->word2);
2536
2537                 protgrp_blks = protgroup_len / 8;
2538                 protgrp_bytes = protgrp_blks * blksize;
2539
2540                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2541                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2542                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2543                         protgroup_offset += protgroup_remainder;
2544                         protgrp_blks = protgroup_remainder / 8;
2545                         protgrp_bytes = protgrp_blks * blksize;
2546                 } else {
2547                         protgroup_offset = 0;
2548                         curr_prot++;
2549                 }
2550
2551                 num_sge++;
2552
2553                 /* setup SGE's for data blocks associated with DIF data */
2554                 pgdone = 0;
2555                 subtotal = 0; /* total bytes processed for current prot grp */
2556                 while (!pgdone) {
2557                         /* Check to see if we ran out of space */
2558                         if (num_sge >= phba->cfg_total_seg_cnt)
2559                                 return num_sge + 1;
2560
2561                         if (!sgde) {
2562                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2563                                         "9086 BLKGRD:%s Invalid data segment\n",
2564                                                 __func__);
2565                                 return 0;
2566                         }
2567                         sgl++;
2568                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2569
2570                         remainder = sg_dma_len(sgde) - split_offset;
2571
2572                         if ((subtotal + remainder) <= protgrp_bytes) {
2573                                 /* we can use this whole buffer */
2574                                 dma_len = remainder;
2575                                 split_offset = 0;
2576
2577                                 if ((subtotal + remainder) == protgrp_bytes)
2578                                         pgdone = 1;
2579                         } else {
2580                                 /* must split this buffer with next prot grp */
2581                                 dma_len = protgrp_bytes - subtotal;
2582                                 split_offset += dma_len;
2583                         }
2584
2585                         subtotal += dma_len;
2586
2587                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2588                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2589                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2590                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2591                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2592
2593                         sgl->sge_len = cpu_to_le32(dma_len);
2594                         dma_offset += dma_len;
2595
2596                         num_sge++;
2597                         curr_data++;
2598
2599                         if (split_offset)
2600                                 break;
2601
2602                         /* Move to the next s/g segment if possible */
2603                         sgde = sg_next(sgde);
2604                 }
2605
2606                 if (protgroup_offset) {
2607                         /* update the reference tag */
2608                         reftag += protgrp_blks;
2609                         sgl++;
2610                         continue;
2611                 }
2612
2613                 /* are we done ? */
2614                 if (curr_prot == protcnt) {
2615                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2616                         alldone = 1;
2617                 } else if (curr_prot < protcnt) {
2618                         /* advance to next prot buffer */
2619                         sgpe = sg_next(sgpe);
2620                         sgl++;
2621
2622                         /* update the reference tag */
2623                         reftag += protgrp_blks;
2624                 } else {
2625                         /* if we're here, we have a bug */
2626                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2627                                 "9085 BLKGRD: bug in %s\n", __func__);
2628                 }
2629
2630         } while (!alldone);
2631
2632 out:
2633
2634         return num_sge;
2635 }
2636
2637 /**
2638  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2639  * @phba: The Hba for which this call is being executed.
2640  * @sc: pointer to scsi command we're working on
2641  *
2642  * Given a SCSI command that supports DIF, determine composition of protection
2643  * groups involved in setting up buffer lists
2644  *
2645  * Returns: Protection group type (with or without DIF)
2646  *
2647  **/
2648 static int
2649 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2650 {
2651         int ret = LPFC_PG_TYPE_INVALID;
2652         unsigned char op = scsi_get_prot_op(sc);
2653
2654         switch (op) {
2655         case SCSI_PROT_READ_STRIP:
2656         case SCSI_PROT_WRITE_INSERT:
2657                 ret = LPFC_PG_TYPE_NO_DIF;
2658                 break;
2659         case SCSI_PROT_READ_INSERT:
2660         case SCSI_PROT_WRITE_STRIP:
2661         case SCSI_PROT_READ_PASS:
2662         case SCSI_PROT_WRITE_PASS:
2663                 ret = LPFC_PG_TYPE_DIF_BUF;
2664                 break;
2665         default:
2666                 if (phba)
2667                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2668                                         "9021 Unsupported protection op:%d\n",
2669                                         op);
2670                 break;
2671         }
2672         return ret;
2673 }
2674
2675 /**
2676  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2677  * @phba: The Hba for which this call is being executed.
2678  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2679  *
2680  * Adjust the data length to account for how much data
2681  * is actually on the wire.
2682  *
2683  * returns the adjusted data length
2684  **/
2685 static int
2686 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2687                        struct lpfc_scsi_buf *lpfc_cmd)
2688 {
2689         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2690         int fcpdl;
2691
2692         fcpdl = scsi_bufflen(sc);
2693
2694         /* Check if there is protection data on the wire */
2695         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2696                 /* Read check for protection data */
2697                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2698                         return fcpdl;
2699
2700         } else {
2701                 /* Write check for protection data */
2702                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2703                         return fcpdl;
2704         }
2705
2706         /*
2707          * If we are in DIF Type 1 mode every data block has a 8 byte
2708          * DIF (trailer) attached to it. Must ajust FCP data length
2709          * to account for the protection data.
2710          */
2711         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2712
2713         return fcpdl;
2714 }
2715
2716 /**
2717  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2718  * @phba: The Hba for which this call is being executed.
2719  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2720  *
2721  * This is the protection/DIF aware version of
2722  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2723  * two functions eventually, but for now, it's here
2724  **/
2725 static int
2726 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2727                 struct lpfc_scsi_buf *lpfc_cmd)
2728 {
2729         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2730         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2731         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2732         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2733         uint32_t num_bde = 0;
2734         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2735         int prot_group_type = 0;
2736         int fcpdl;
2737
2738         /*
2739          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2740          *  fcp_rsp regions to the first data bde entry
2741          */
2742         bpl += 2;
2743         if (scsi_sg_count(scsi_cmnd)) {
2744                 /*
2745                  * The driver stores the segment count returned from pci_map_sg
2746                  * because this a count of dma-mappings used to map the use_sg
2747                  * pages.  They are not guaranteed to be the same for those
2748                  * architectures that implement an IOMMU.
2749                  */
2750                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2751                                         scsi_sglist(scsi_cmnd),
2752                                         scsi_sg_count(scsi_cmnd), datadir);
2753                 if (unlikely(!datasegcnt))
2754                         return 1;
2755
2756                 lpfc_cmd->seg_cnt = datasegcnt;
2757
2758                 /* First check if data segment count from SCSI Layer is good */
2759                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2760                         goto err;
2761
2762                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2763
2764                 switch (prot_group_type) {
2765                 case LPFC_PG_TYPE_NO_DIF:
2766
2767                         /* Here we need to add a PDE5 and PDE6 to the count */
2768                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2769                                 goto err;
2770
2771                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2772                                         datasegcnt);
2773                         /* we should have 2 or more entries in buffer list */
2774                         if (num_bde < 2)
2775                                 goto err;
2776                         break;
2777
2778                 case LPFC_PG_TYPE_DIF_BUF:
2779                         /*
2780                          * This type indicates that protection buffers are
2781                          * passed to the driver, so that needs to be prepared
2782                          * for DMA
2783                          */
2784                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2785                                         scsi_prot_sglist(scsi_cmnd),
2786                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2787                         if (unlikely(!protsegcnt)) {
2788                                 scsi_dma_unmap(scsi_cmnd);
2789                                 return 1;
2790                         }
2791
2792                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2793
2794                         /*
2795                          * There is a minimun of 4 BPLs used for every
2796                          * protection data segment.
2797                          */
2798                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2799                             (phba->cfg_total_seg_cnt - 2))
2800                                 goto err;
2801
2802                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2803                                         datasegcnt, protsegcnt);
2804                         /* we should have 3 or more entries in buffer list */
2805                         if ((num_bde < 3) ||
2806                             (num_bde > phba->cfg_total_seg_cnt))
2807                                 goto err;
2808                         break;
2809
2810                 case LPFC_PG_TYPE_INVALID:
2811                 default:
2812                         scsi_dma_unmap(scsi_cmnd);
2813                         lpfc_cmd->seg_cnt = 0;
2814
2815                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2816                                         "9022 Unexpected protection group %i\n",
2817                                         prot_group_type);
2818                         return 1;
2819                 }
2820         }
2821
2822         /*
2823          * Finish initializing those IOCB fields that are dependent on the
2824          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2825          * reinitialized since all iocb memory resources are used many times
2826          * for transmit, receive, and continuation bpl's.
2827          */
2828         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2829         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2830         iocb_cmd->ulpBdeCount = 1;
2831         iocb_cmd->ulpLe = 1;
2832
2833         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2834         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2835
2836         /*
2837          * Due to difference in data length between DIF/non-DIF paths,
2838          * we need to set word 4 of IOCB here
2839          */
2840         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2841
2842         return 0;
2843 err:
2844         if (lpfc_cmd->seg_cnt)
2845                 scsi_dma_unmap(scsi_cmnd);
2846         if (lpfc_cmd->prot_seg_cnt)
2847                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2848                              scsi_prot_sg_count(scsi_cmnd),
2849                              scsi_cmnd->sc_data_direction);
2850
2851         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2852                         "9023 Cannot setup S/G List for HBA"
2853                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2854                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2855                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2856                         prot_group_type, num_bde);
2857
2858         lpfc_cmd->seg_cnt = 0;
2859         lpfc_cmd->prot_seg_cnt = 0;
2860         return 1;
2861 }
2862
2863 /*
2864  * This function calcuates the T10 DIF guard tag
2865  * on the specified data using a CRC algorithmn
2866  * using crc_t10dif.
2867  */
2868 static uint16_t
2869 lpfc_bg_crc(uint8_t *data, int count)
2870 {
2871         uint16_t crc = 0;
2872         uint16_t x;
2873
2874         crc = crc_t10dif(data, count);
2875         x = cpu_to_be16(crc);
2876         return x;
2877 }
2878
2879 /*
2880  * This function calcuates the T10 DIF guard tag
2881  * on the specified data using a CSUM algorithmn
2882  * using ip_compute_csum.
2883  */
2884 static uint16_t
2885 lpfc_bg_csum(uint8_t *data, int count)
2886 {
2887         uint16_t ret;
2888
2889         ret = ip_compute_csum(data, count);
2890         return ret;
2891 }
2892
2893 /*
2894  * This function examines the protection data to try to determine
2895  * what type of T10-DIF error occurred.
2896  */
2897 static void
2898 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2899 {
2900         struct scatterlist *sgpe; /* s/g prot entry */
2901         struct scatterlist *sgde; /* s/g data entry */
2902         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2903         struct scsi_dif_tuple *src = NULL;
2904         uint8_t *data_src = NULL;
2905         uint16_t guard_tag;
2906         uint16_t start_app_tag, app_tag;
2907         uint32_t start_ref_tag, ref_tag;
2908         int prot, protsegcnt;
2909         int err_type, len, data_len;
2910         int chk_ref, chk_app, chk_guard;
2911         uint16_t sum;
2912         unsigned blksize;
2913
2914         err_type = BGS_GUARD_ERR_MASK;
2915         sum = 0;
2916         guard_tag = 0;
2917
2918         /* First check to see if there is protection data to examine */
2919         prot = scsi_get_prot_op(cmd);
2920         if ((prot == SCSI_PROT_READ_STRIP) ||
2921             (prot == SCSI_PROT_WRITE_INSERT) ||
2922             (prot == SCSI_PROT_NORMAL))
2923                 goto out;
2924
2925         /* Currently the driver just supports ref_tag and guard_tag checking */
2926         chk_ref = 1;
2927         chk_app = 0;
2928         chk_guard = 0;
2929
2930         /* Setup a ptr to the protection data provided by the SCSI host */
2931         sgpe = scsi_prot_sglist(cmd);
2932         protsegcnt = lpfc_cmd->prot_seg_cnt;
2933
2934         if (sgpe && protsegcnt) {
2935
2936                 /*
2937                  * We will only try to verify guard tag if the segment
2938                  * data length is a multiple of the blksize.
2939                  */
2940                 sgde = scsi_sglist(cmd);
2941                 blksize = lpfc_cmd_blksize(cmd);
2942                 data_src = (uint8_t *)sg_virt(sgde);
2943                 data_len = sgde->length;
2944                 if ((data_len & (blksize - 1)) == 0)
2945                         chk_guard = 1;
2946
2947                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2948                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2949                 start_app_tag = src->app_tag;
2950                 len = sgpe->length;
2951                 while (src && protsegcnt) {
2952                         while (len) {
2953
2954                                 /*
2955                                  * First check to see if a protection data
2956                                  * check is valid
2957                                  */
2958                                 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
2959                                     (src->app_tag == T10_PI_APP_ESCAPE)) {
2960                                         start_ref_tag++;
2961                                         goto skipit;
2962                                 }
2963
2964                                 /* First Guard Tag checking */
2965                                 if (chk_guard) {
2966                                         guard_tag = src->guard_tag;
2967                                         if (lpfc_cmd_guard_csum(cmd))
2968                                                 sum = lpfc_bg_csum(data_src,
2969                                                                    blksize);
2970                                         else
2971                                                 sum = lpfc_bg_crc(data_src,
2972                                                                   blksize);
2973                                         if ((guard_tag != sum)) {
2974                                                 err_type = BGS_GUARD_ERR_MASK;
2975                                                 goto out;
2976                                         }
2977                                 }
2978
2979                                 /* Reference Tag checking */
2980                                 ref_tag = be32_to_cpu(src->ref_tag);
2981                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2982                                         err_type = BGS_REFTAG_ERR_MASK;
2983                                         goto out;
2984                                 }
2985                                 start_ref_tag++;
2986
2987                                 /* App Tag checking */
2988                                 app_tag = src->app_tag;
2989                                 if (chk_app && (app_tag != start_app_tag)) {
2990                                         err_type = BGS_APPTAG_ERR_MASK;
2991                                         goto out;
2992                                 }
2993 skipit:
2994                                 len -= sizeof(struct scsi_dif_tuple);
2995                                 if (len < 0)
2996                                         len = 0;
2997                                 src++;
2998
2999                                 data_src += blksize;
3000                                 data_len -= blksize;
3001
3002                                 /*
3003                                  * Are we at the end of the Data segment?
3004                                  * The data segment is only used for Guard
3005                                  * tag checking.
3006                                  */
3007                                 if (chk_guard && (data_len == 0)) {
3008                                         chk_guard = 0;
3009                                         sgde = sg_next(sgde);
3010                                         if (!sgde)
3011                                                 goto out;
3012
3013                                         data_src = (uint8_t *)sg_virt(sgde);
3014                                         data_len = sgde->length;
3015                                         if ((data_len & (blksize - 1)) == 0)
3016                                                 chk_guard = 1;
3017                                 }
3018                         }
3019
3020                         /* Goto the next Protection data segment */
3021                         sgpe = sg_next(sgpe);
3022                         if (sgpe) {
3023                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3024                                 len = sgpe->length;
3025                         } else {
3026                                 src = NULL;
3027                         }
3028                         protsegcnt--;
3029                 }
3030         }
3031 out:
3032         if (err_type == BGS_GUARD_ERR_MASK) {
3033                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3034                                         0x10, 0x1);
3035                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3036                               SAM_STAT_CHECK_CONDITION;
3037                 phba->bg_guard_err_cnt++;
3038                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3039                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3040                                 (unsigned long)scsi_get_lba(cmd),
3041                                 sum, guard_tag);
3042
3043         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3044                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3045                                         0x10, 0x3);
3046                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3047                               SAM_STAT_CHECK_CONDITION;
3048
3049                 phba->bg_reftag_err_cnt++;
3050                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3051                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3052                                 (unsigned long)scsi_get_lba(cmd),
3053                                 ref_tag, start_ref_tag);
3054
3055         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3056                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3057                                         0x10, 0x2);
3058                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3059                               SAM_STAT_CHECK_CONDITION;
3060
3061                 phba->bg_apptag_err_cnt++;
3062                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3063                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3064                                 (unsigned long)scsi_get_lba(cmd),
3065                                 app_tag, start_app_tag);
3066         }
3067 }
3068
3069
3070 /*
3071  * This function checks for BlockGuard errors detected by
3072  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3073  * sense buffer will be set accordingly, paired with
3074  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3075  * detected corruption.
3076  *
3077  * Returns:
3078  *  0 - No error found
3079  *  1 - BlockGuard error found
3080  * -1 - Internal error (bad profile, ...etc)
3081  */
3082 static int
3083 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3084                         struct lpfc_iocbq *pIocbOut)
3085 {
3086         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3087         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3088         int ret = 0;
3089         uint32_t bghm = bgf->bghm;
3090         uint32_t bgstat = bgf->bgstat;
3091         uint64_t failing_sector = 0;
3092
3093         spin_lock(&_dump_buf_lock);
3094         if (!_dump_buf_done) {
3095                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3096                         " Data for %u blocks to debugfs\n",
3097                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3098                 lpfc_debug_save_data(phba, cmd);
3099
3100                 /* If we have a prot sgl, save the DIF buffer */
3101                 if (lpfc_prot_group_type(phba, cmd) ==
3102                                 LPFC_PG_TYPE_DIF_BUF) {
3103                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3104                                 "Saving DIF for %u blocks to debugfs\n",
3105                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3106                         lpfc_debug_save_dif(phba, cmd);
3107                 }
3108
3109                 _dump_buf_done = 1;
3110         }
3111         spin_unlock(&_dump_buf_lock);
3112
3113         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3114                 cmd->result = DID_ERROR << 16;
3115                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3116                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3117                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3118                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3119                                 (unsigned long long)scsi_get_lba(cmd),
3120                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3121                 ret = (-1);
3122                 goto out;
3123         }
3124
3125         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3126                 cmd->result = DID_ERROR << 16;
3127                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3128                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3129                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3130                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3131                                 (unsigned long long)scsi_get_lba(cmd),
3132                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3133                 ret = (-1);
3134                 goto out;
3135         }
3136
3137         if (lpfc_bgs_get_guard_err(bgstat)) {
3138                 ret = 1;
3139
3140                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3141                                 0x10, 0x1);
3142                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3143                               SAM_STAT_CHECK_CONDITION;
3144                 phba->bg_guard_err_cnt++;
3145                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3146                                 "9055 BLKGRD: Guard Tag error in cmd"
3147                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3148                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3149                                 (unsigned long long)scsi_get_lba(cmd),
3150                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3151         }
3152
3153         if (lpfc_bgs_get_reftag_err(bgstat)) {
3154                 ret = 1;
3155
3156                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3157                                 0x10, 0x3);
3158                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3159                               SAM_STAT_CHECK_CONDITION;
3160
3161                 phba->bg_reftag_err_cnt++;
3162                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3163                                 "9056 BLKGRD: Ref Tag error in cmd"
3164                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3165                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3166                                 (unsigned long long)scsi_get_lba(cmd),
3167                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3168         }
3169
3170         if (lpfc_bgs_get_apptag_err(bgstat)) {
3171                 ret = 1;
3172
3173                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3174                                 0x10, 0x2);
3175                 cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
3176                               SAM_STAT_CHECK_CONDITION;
3177
3178                 phba->bg_apptag_err_cnt++;
3179                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3180                                 "9061 BLKGRD: App Tag error in cmd"
3181                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3182                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3183                                 (unsigned long long)scsi_get_lba(cmd),
3184                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3185         }
3186
3187         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3188                 /*
3189                  * setup sense data descriptor 0 per SPC-4 as an information
3190                  * field, and put the failing LBA in it.
3191                  * This code assumes there was also a guard/app/ref tag error
3192                  * indication.
3193                  */
3194                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3195                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3196                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3197                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3198
3199                 /* bghm is a "on the wire" FC frame based count */
3200                 switch (scsi_get_prot_op(cmd)) {
3201                 case SCSI_PROT_READ_INSERT:
3202                 case SCSI_PROT_WRITE_STRIP:
3203                         bghm /= cmd->device->sector_size;
3204                         break;
3205                 case SCSI_PROT_READ_STRIP:
3206                 case SCSI_PROT_WRITE_INSERT:
3207                 case SCSI_PROT_READ_PASS:
3208                 case SCSI_PROT_WRITE_PASS:
3209                         bghm /= (cmd->device->sector_size +
3210                                 sizeof(struct scsi_dif_tuple));
3211                         break;
3212                 }
3213
3214                 failing_sector = scsi_get_lba(cmd);
3215                 failing_sector += bghm;
3216
3217                 /* Descriptor Information */
3218                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3219         }
3220
3221         if (!ret) {
3222                 /* No error was reported - problem in FW? */
3223                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3224                                 "9057 BLKGRD: Unknown error in cmd"
3225                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3226                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3227                                 (unsigned long long)scsi_get_lba(cmd),
3228                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3229
3230                 /* Calcuate what type of error it was */
3231                 lpfc_calc_bg_err(phba, lpfc_cmd);
3232         }
3233 out:
3234         return ret;
3235 }
3236
3237 /**
3238  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3239  * @phba: The Hba for which this call is being executed.
3240  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3241  *
3242  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3243  * field of @lpfc_cmd for device with SLI-4 interface spec.
3244  *
3245  * Return codes:
3246  *      1 - Error
3247  *      0 - Success
3248  **/
3249 static int
3250 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3251 {
3252         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3253         struct scatterlist *sgel = NULL;
3254         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3255         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3256         struct sli4_sge *first_data_sgl;
3257         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3258         dma_addr_t physaddr;
3259         uint32_t num_bde = 0;
3260         uint32_t dma_len;
3261         uint32_t dma_offset = 0;
3262         int nseg;
3263         struct ulp_bde64 *bde;
3264
3265         /*
3266          * There are three possibilities here - use scatter-gather segment, use
3267          * the single mapping, or neither.  Start the lpfc command prep by
3268          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3269          * data bde entry.
3270          */
3271         if (scsi_sg_count(scsi_cmnd)) {
3272                 /*
3273                  * The driver stores the segment count returned from pci_map_sg
3274                  * because this a count of dma-mappings used to map the use_sg
3275                  * pages.  They are not guaranteed to be the same for those
3276                  * architectures that implement an IOMMU.
3277                  */
3278
3279                 nseg = scsi_dma_map(scsi_cmnd);
3280                 if (unlikely(nseg <= 0))
3281                         return 1;
3282                 sgl += 1;
3283                 /* clear the last flag in the fcp_rsp map entry */
3284                 sgl->word2 = le32_to_cpu(sgl->word2);
3285                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3286                 sgl->word2 = cpu_to_le32(sgl->word2);
3287                 sgl += 1;
3288                 first_data_sgl = sgl;
3289                 lpfc_cmd->seg_cnt = nseg;
3290                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3291                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3292                                 " %s: Too many sg segments from "
3293                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3294                                 __func__, phba->cfg_sg_seg_cnt,
3295                                lpfc_cmd->seg_cnt);
3296                         lpfc_cmd->seg_cnt = 0;
3297                         scsi_dma_unmap(scsi_cmnd);
3298                         return 1;
3299                 }
3300
3301                 /*
3302                  * The driver established a maximum scatter-gather segment count
3303                  * during probe that limits the number of sg elements in any
3304                  * single scsi command.  Just run through the seg_cnt and format
3305                  * the sge's.
3306                  * When using SLI-3 the driver will try to fit all the BDEs into
3307                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3308                  * does for SLI-2 mode.
3309                  */
3310                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3311                         physaddr = sg_dma_address(sgel);
3312                         dma_len = sg_dma_len(sgel);
3313                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3314                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3315                         sgl->word2 = le32_to_cpu(sgl->word2);
3316                         if ((num_bde + 1) == nseg)
3317                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3318                         else
3319                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3320                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3321                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3322                         sgl->word2 = cpu_to_le32(sgl->word2);
3323                         sgl->sge_len = cpu_to_le32(dma_len);
3324                         dma_offset += dma_len;
3325                         sgl++;
3326                 }
3327                 /*
3328                  * Setup the first Payload BDE. For FCoE we just key off
3329                  * Performance Hints, for FC we use lpfc_enable_pbde.
3330                  * We populate words 13-15 of IOCB/WQE.
3331                  */
3332                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3333                     phba->cfg_enable_pbde) {
3334                         bde = (struct ulp_bde64 *)
3335                                 &(iocb_cmd->unsli3.sli3Words[5]);
3336                         bde->addrLow = first_data_sgl->addr_lo;
3337                         bde->addrHigh = first_data_sgl->addr_hi;
3338                         bde->tus.f.bdeSize =
3339                                         le32_to_cpu(first_data_sgl->sge_len);
3340                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3341                         bde->tus.w = cpu_to_le32(bde->tus.w);
3342                 }
3343         } else {
3344                 sgl += 1;
3345                 /* clear the last flag in the fcp_rsp map entry */
3346                 sgl->word2 = le32_to_cpu(sgl->word2);
3347                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3348                 sgl->word2 = cpu_to_le32(sgl->word2);
3349
3350                 if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3351                     phba->cfg_enable_pbde) {
3352                         bde = (struct ulp_bde64 *)
3353                                 &(iocb_cmd->unsli3.sli3Words[5]);
3354                         memset(bde, 0, (sizeof(uint32_t) * 3));
3355                 }
3356         }
3357
3358         /*
3359          * Finish initializing those IOCB fields that are dependent on the
3360          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3361          * explicitly reinitialized.
3362          * all iocb memory resources are reused.
3363          */
3364         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3365
3366         /*
3367          * Due to difference in data length between DIF/non-DIF paths,
3368          * we need to set word 4 of IOCB here
3369          */
3370         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3371
3372         /*
3373          * If the OAS driver feature is enabled and the lun is enabled for
3374          * OAS, set the oas iocb related flags.
3375          */
3376         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3377                 scsi_cmnd->device->hostdata)->oas_enabled) {
3378                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3379                 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
3380                         scsi_cmnd->device->hostdata)->priority;
3381         }
3382         return 0;
3383 }
3384
3385 /**
3386  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3387  * @phba: The Hba for which this call is being executed.
3388  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3389  *
3390  * This is the protection/DIF aware version of
3391  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3392  * two functions eventually, but for now, it's here
3393  **/
3394 static int
3395 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3396                 struct lpfc_scsi_buf *lpfc_cmd)
3397 {
3398         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3399         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3400         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3401         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3402         uint32_t num_sge = 0;
3403         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3404         int prot_group_type = 0;
3405         int fcpdl;
3406
3407         /*
3408          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3409          *  fcp_rsp regions to the first data sge entry
3410          */
3411         if (scsi_sg_count(scsi_cmnd)) {
3412                 /*
3413                  * The driver stores the segment count returned from pci_map_sg
3414                  * because this a count of dma-mappings used to map the use_sg
3415                  * pages.  They are not guaranteed to be the same for those
3416                  * architectures that implement an IOMMU.
3417                  */
3418                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3419                                         scsi_sglist(scsi_cmnd),
3420                                         scsi_sg_count(scsi_cmnd), datadir);
3421                 if (unlikely(!datasegcnt))
3422                         return 1;
3423
3424                 sgl += 1;
3425                 /* clear the last flag in the fcp_rsp map entry */
3426                 sgl->word2 = le32_to_cpu(sgl->word2);
3427                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3428                 sgl->word2 = cpu_to_le32(sgl->word2);
3429
3430                 sgl += 1;
3431                 lpfc_cmd->seg_cnt = datasegcnt;
3432
3433                 /* First check if data segment count from SCSI Layer is good */
3434                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3435                         goto err;
3436
3437                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3438
3439                 switch (prot_group_type) {
3440                 case LPFC_PG_TYPE_NO_DIF:
3441                         /* Here we need to add a DISEED to the count */
3442                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3443                                 goto err;
3444
3445                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3446                                         datasegcnt);
3447
3448                         /* we should have 2 or more entries in buffer list */
3449                         if (num_sge < 2)
3450                                 goto err;
3451                         break;
3452
3453                 case LPFC_PG_TYPE_DIF_BUF:
3454                         /*
3455                          * This type indicates that protection buffers are
3456                          * passed to the driver, so that needs to be prepared
3457                          * for DMA
3458                          */
3459                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3460                                         scsi_prot_sglist(scsi_cmnd),
3461                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3462                         if (unlikely(!protsegcnt)) {
3463                                 scsi_dma_unmap(scsi_cmnd);
3464                                 return 1;
3465                         }
3466
3467                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3468                         /*
3469                          * There is a minimun of 3 SGEs used for every
3470                          * protection data segment.
3471                          */
3472                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3473                             (phba->cfg_total_seg_cnt - 2))
3474                                 goto err;
3475
3476                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3477                                         datasegcnt, protsegcnt);
3478
3479                         /* we should have 3 or more entries in buffer list */
3480                         if ((num_sge < 3) ||
3481                             (num_sge > phba->cfg_total_seg_cnt))
3482                                 goto err;
3483                         break;
3484
3485                 case LPFC_PG_TYPE_INVALID:
3486                 default:
3487                         scsi_dma_unmap(scsi_cmnd);
3488                         lpfc_cmd->seg_cnt = 0;
3489
3490                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3491                                         "9083 Unexpected protection group %i\n",
3492                                         prot_group_type);
3493                         return 1;
3494                 }
3495         }
3496
3497         switch (scsi_get_prot_op(scsi_cmnd)) {
3498         case SCSI_PROT_WRITE_STRIP:
3499         case SCSI_PROT_READ_STRIP:
3500                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3501                 break;
3502         case SCSI_PROT_WRITE_INSERT:
3503         case SCSI_PROT_READ_INSERT:
3504                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3505                 break;
3506         case SCSI_PROT_WRITE_PASS:
3507         case SCSI_PROT_READ_PASS:
3508                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3509                 break;
3510         }
3511
3512         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3513         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3514
3515         /*
3516          * Due to difference in data length between DIF/non-DIF paths,
3517          * we need to set word 4 of IOCB here
3518          */
3519         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3520
3521         /*
3522          * If the OAS driver feature is enabled and the lun is enabled for
3523          * OAS, set the oas iocb related flags.
3524          */
3525         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3526                 scsi_cmnd->device->hostdata)->oas_enabled)
3527                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3528
3529         return 0;
3530 err:
3531         if (lpfc_cmd->seg_cnt)
3532                 scsi_dma_unmap(scsi_cmnd);
3533         if (lpfc_cmd->prot_seg_cnt)
3534                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3535                              scsi_prot_sg_count(scsi_cmnd),
3536                              scsi_cmnd->sc_data_direction);
3537
3538         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3539                         "9084 Cannot setup S/G List for HBA"
3540                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3541                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3542                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3543                         prot_group_type, num_sge);
3544
3545         lpfc_cmd->seg_cnt = 0;
3546         lpfc_cmd->prot_seg_cnt = 0;
3547         return 1;
3548 }
3549
3550 /**
3551  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3552  * @phba: The Hba for which this call is being executed.
3553  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3554  *
3555  * This routine wraps the actual DMA mapping function pointer from the
3556  * lpfc_hba struct.
3557  *
3558  * Return codes:
3559  *      1 - Error
3560  *      0 - Success
3561  **/
3562 static inline int
3563 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3564 {
3565         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3566 }
3567
3568 /**
3569  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3570  * using BlockGuard.
3571  * @phba: The Hba for which this call is being executed.
3572  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3573  *
3574  * This routine wraps the actual DMA mapping function pointer from the
3575  * lpfc_hba struct.
3576  *
3577  * Return codes:
3578  *      1 - Error
3579  *      0 - Success
3580  **/
3581 static inline int
3582 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3583 {
3584         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3585 }
3586
3587 /**
3588  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3589  * @phba: Pointer to hba context object.
3590  * @vport: Pointer to vport object.
3591  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3592  * @rsp_iocb: Pointer to response iocb object which reported error.
3593  *
3594  * This function posts an event when there is a SCSI command reporting
3595  * error from the scsi device.
3596  **/
3597 static void
3598 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3599                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3600         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3601         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3602         uint32_t resp_info = fcprsp->rspStatus2;
3603         uint32_t scsi_status = fcprsp->rspStatus3;
3604         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3605         struct lpfc_fast_path_event *fast_path_evt = NULL;
3606         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3607         unsigned long flags;
3608
3609         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3610                 return;
3611
3612         /* If there is queuefull or busy condition send a scsi event */
3613         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3614                 (cmnd->result == SAM_STAT_BUSY)) {
3615                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3616                 if (!fast_path_evt)
3617                         return;
3618                 fast_path_evt->un.scsi_evt.event_type =
3619                         FC_REG_SCSI_EVENT;
3620                 fast_path_evt->un.scsi_evt.subcategory =
3621                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3622                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3623                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3624                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3625                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3626                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3627                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3628         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3629                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3630                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3631                 if (!fast_path_evt)
3632                         return;
3633                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3634                         FC_REG_SCSI_EVENT;
3635                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3636                         LPFC_EVENT_CHECK_COND;
3637                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3638                         cmnd->device->lun;
3639                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3640                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3641                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3642                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3643                 fast_path_evt->un.check_cond_evt.sense_key =
3644                         cmnd->sense_buffer[2] & 0xf;
3645                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3646                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3647         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3648                      fcpi_parm &&
3649                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3650                         ((scsi_status == SAM_STAT_GOOD) &&
3651                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3652                 /*
3653                  * If status is good or resid does not match with fcp_param and
3654                  * there is valid fcpi_parm, then there is a read_check error
3655                  */
3656                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3657                 if (!fast_path_evt)
3658                         return;
3659                 fast_path_evt->un.read_check_error.header.event_type =
3660                         FC_REG_FABRIC_EVENT;
3661                 fast_path_evt->un.read_check_error.header.subcategory =
3662                         LPFC_EVENT_FCPRDCHKERR;
3663                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3664                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3665                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3666                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3667                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3668                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3669                 fast_path_evt->un.read_check_error.fcpiparam =
3670                         fcpi_parm;
3671         } else
3672                 return;
3673
3674         fast_path_evt->vport = vport;
3675         spin_lock_irqsave(&phba->hbalock, flags);
3676         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3677         spin_unlock_irqrestore(&phba->hbalock, flags);
3678         lpfc_worker_wake_up(phba);
3679         return;
3680 }
3681
3682 /**
3683  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3684  * @phba: The HBA for which this call is being executed.
3685  * @psb: The scsi buffer which is going to be un-mapped.
3686  *
3687  * This routine does DMA un-mapping of scatter gather list of scsi command
3688  * field of @lpfc_cmd for device with SLI-3 interface spec.
3689  **/
3690 static void
3691 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3692 {
3693         /*
3694          * There are only two special cases to consider.  (1) the scsi command
3695          * requested scatter-gather usage or (2) the scsi command allocated
3696          * a request buffer, but did not request use_sg.  There is a third
3697          * case, but it does not require resource deallocation.
3698          */
3699         if (psb->seg_cnt > 0)
3700                 scsi_dma_unmap(psb->pCmd);
3701         if (psb->prot_seg_cnt > 0)
3702                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3703                                 scsi_prot_sg_count(psb->pCmd),
3704                                 psb->pCmd->sc_data_direction);
3705 }
3706
3707 /**
3708  * lpfc_handler_fcp_err - FCP response handler
3709  * @vport: The virtual port for which this call is being executed.
3710  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3711  * @rsp_iocb: The response IOCB which contains FCP error.
3712  *
3713  * This routine is called to process response IOCB with status field
3714  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3715  * based upon SCSI and FCP error.
3716  **/
3717 static void
3718 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3719                     struct lpfc_iocbq *rsp_iocb)
3720 {
3721         struct lpfc_hba *phba = vport->phba;
3722         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3723         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3724         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3725         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3726         uint32_t resp_info = fcprsp->rspStatus2;
3727         uint32_t scsi_status = fcprsp->rspStatus3;
3728         uint32_t *lp;
3729         uint32_t host_status = DID_OK;
3730         uint32_t rsplen = 0;
3731         uint32_t fcpDl;
3732         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3733
3734
3735         /*
3736          *  If this is a task management command, there is no
3737          *  scsi packet associated with this lpfc_cmd.  The driver
3738          *  consumes it.
3739          */
3740         if (fcpcmd->fcpCntl2) {
3741                 scsi_status = 0;
3742                 goto out;
3743         }
3744
3745         if (resp_info & RSP_LEN_VALID) {
3746                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3747                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3748                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3749                                  "2719 Invalid response length: "
3750                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3751                                  cmnd->device->id,
3752                                  cmnd->device->lun, cmnd->cmnd[0],
3753                                  rsplen);
3754                         host_status = DID_ERROR;
3755                         goto out;
3756                 }
3757                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3758                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3759                                  "2757 Protocol failure detected during "
3760                                  "processing of FCP I/O op: "
3761                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3762                                  cmnd->device->id,
3763                                  cmnd->device->lun, cmnd->cmnd[0],
3764                                  fcprsp->rspInfo3);
3765                         host_status = DID_ERROR;
3766                         goto out;
3767                 }
3768         }
3769
3770         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3771                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3772                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3773                         snslen = SCSI_SENSE_BUFFERSIZE;
3774
3775                 if (resp_info & RSP_LEN_VALID)
3776                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3777                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3778         }
3779         lp = (uint32_t *)cmnd->sense_buffer;
3780
3781         /* special handling for under run conditions */
3782         if (!scsi_status && (resp_info & RESID_UNDER)) {
3783                 /* don't log under runs if fcp set... */
3784                 if (vport->cfg_log_verbose & LOG_FCP)
3785                         logit = LOG_FCP_ERROR;
3786                 /* unless operator says so */
3787                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3788                         logit = LOG_FCP_UNDER;
3789         }
3790
3791         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3792                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3793                          "Data: x%x x%x x%x x%x x%x\n",
3794                          cmnd->cmnd[0], scsi_status,
3795                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3796                          be32_to_cpu(fcprsp->rspResId),
3797                          be32_to_cpu(fcprsp->rspSnsLen),
3798                          be32_to_cpu(fcprsp->rspRspLen),
3799                          fcprsp->rspInfo3);
3800
3801         scsi_set_resid(cmnd, 0);
3802         fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3803         if (resp_info & RESID_UNDER) {
3804                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3805
3806                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3807                                  "9025 FCP Underrun, expected %d, "
3808                                  "residual %d Data: x%x x%x x%x\n",
3809                                  fcpDl,
3810                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3811                                  cmnd->underflow);
3812
3813                 /*
3814                  * If there is an under run, check if under run reported by
3815                  * storage array is same as the under run reported by HBA.
3816                  * If this is not same, there is a dropped frame.
3817                  */
3818                 if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3819                         lpfc_printf_vlog(vport, KERN_WARNING,
3820                                          LOG_FCP | LOG_FCP_ERROR,
3821                                          "9026 FCP Read Check Error "
3822                                          "and Underrun Data: x%x x%x x%x x%x\n",
3823                                          fcpDl,
3824                                          scsi_get_resid(cmnd), fcpi_parm,
3825                                          cmnd->cmnd[0]);
3826                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3827                         host_status = DID_ERROR;
3828                 }
3829                 /*
3830                  * The cmnd->underflow is the minimum number of bytes that must
3831                  * be transferred for this command.  Provided a sense condition
3832                  * is not present, make sure the actual amount transferred is at
3833                  * least the underflow value or fail.
3834                  */
3835                 if (!(resp_info & SNS_LEN_VALID) &&
3836                     (scsi_status == SAM_STAT_GOOD) &&
3837                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3838                      < cmnd->underflow)) {
3839                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3840                                          "9027 FCP command x%x residual "
3841                                          "underrun converted to error "
3842                                          "Data: x%x x%x x%x\n",
3843                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3844                                          scsi_get_resid(cmnd), cmnd->underflow);
3845                         host_status = DID_ERROR;
3846                 }
3847         } else if (resp_info & RESID_OVER) {
3848                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3849                                  "9028 FCP command x%x residual overrun error. "
3850                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3851                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3852                 host_status = DID_ERROR;
3853
3854         /*
3855          * Check SLI validation that all the transfer was actually done
3856          * (fcpi_parm should be zero). Apply check only to reads.
3857          */
3858         } else if (fcpi_parm) {
3859                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3860                                  "9029 FCP %s Check Error xri x%x  Data: "
3861                                  "x%x x%x x%x x%x x%x\n",
3862                                  ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
3863                                  "Read" : "Write"),
3864                                  ((phba->sli_rev == LPFC_SLI_REV4) ?
3865                                  lpfc_cmd->cur_iocbq.sli4_xritag :
3866                                  rsp_iocb->iocb.ulpContext),
3867                                  fcpDl, be32_to_cpu(fcprsp->rspResId),
3868                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3869
3870                 /* There is some issue with the LPe12000 that causes it
3871                  * to miscalculate the fcpi_parm and falsely trip this
3872                  * recovery logic.  Detect this case and don't error when true.
3873                  */
3874                 if (fcpi_parm > fcpDl)
3875                         goto out;
3876
3877                 switch (scsi_status) {
3878                 case SAM_STAT_GOOD:
3879                 case SAM_STAT_CHECK_CONDITION:
3880                         /* Fabric dropped a data frame. Fail any successful
3881                          * command in which we detected dropped frames.
3882                          * A status of good or some check conditions could
3883                          * be considered a successful command.
3884                          */
3885                         host_status = DID_ERROR;
3886                         break;
3887                 }
3888                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3889         }
3890
3891  out:
3892         cmnd->result = host_status << 16 | scsi_status;
3893         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3894 }
3895
3896 /**
3897  * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
3898  * @phba: Pointer to HBA context object.
3899  *
3900  * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
3901  * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
3902  * held.
3903  * If scsi-mq is enabled, get the default block layer mapping of software queues
3904  * to hardware queues. This information is saved in request tag.
3905  *
3906  * Return: index into SLI4 fast-path FCP queue index.
3907  **/
3908 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
3909                                   struct lpfc_scsi_buf *lpfc_cmd)
3910 {
3911         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3912         struct lpfc_vector_map_info *cpup;
3913         int chann, cpu;
3914         uint32_t tag;
3915         uint16_t hwq;
3916
3917         if (cmnd) {
3918                 tag = blk_mq_unique_tag(cmnd->request);
3919                 hwq = blk_mq_unique_tag_to_hwq(tag);
3920
3921                 return hwq;
3922         }
3923
3924         if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
3925             && phba->cfg_fcp_io_channel > 1) {
3926                 cpu = smp_processor_id();
3927                 if (cpu < phba->sli4_hba.num_present_cpu) {
3928                         cpup = phba->sli4_hba.cpu_map;
3929                         cpup += cpu;
3930                         return cpup->channel_id;
3931                 }
3932         }
3933         chann = atomic_add_return(1, &phba->fcp_qidx);
3934         chann = chann % phba->cfg_fcp_io_channel;
3935         return chann;
3936 }
3937
3938
3939 /**
3940  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3941  * @phba: The Hba for which this call is being executed.
3942  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3943  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3944  *
3945  * This routine assigns scsi command result by looking into response IOCB
3946  * status field appropriately. This routine handles QUEUE FULL condition as
3947  * well by ramping down device queue depth.
3948  **/
3949 static void
3950 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3951                         struct lpfc_iocbq *pIocbOut)
3952 {
3953         struct lpfc_scsi_buf *lpfc_cmd =
3954                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3955         struct lpfc_vport      *vport = pIocbIn->vport;
3956         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3957         struct lpfc_nodelist *pnode = rdata->pnode;
3958         struct scsi_cmnd *cmd;
3959         unsigned long flags;
3960         struct lpfc_fast_path_event *fast_path_evt;
3961         struct Scsi_Host *shost;
3962         uint32_t logit = LOG_FCP;
3963
3964         atomic_inc(&phba->fc4ScsiIoCmpls);
3965
3966         /* Sanity check on return of outstanding command */
3967         cmd = lpfc_cmd->pCmd;
3968         if (!cmd)
3969                 return;
3970         shost = cmd->device->host;
3971
3972         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3973         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3974         /* pick up SLI4 exhange busy status from HBA */
3975         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3976
3977 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3978         if (lpfc_cmd->prot_data_type) {
3979                 struct scsi_dif_tuple *src = NULL;
3980
3981                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3982                 /*
3983                  * Used to restore any changes to protection
3984                  * data for error injection.
3985                  */
3986                 switch (lpfc_cmd->prot_data_type) {
3987                 case LPFC_INJERR_REFTAG:
3988                         src->ref_tag =
3989                                 lpfc_cmd->prot_data;
3990                         break;
3991                 case LPFC_INJERR_APPTAG:
3992                         src->app_tag =
3993                                 (uint16_t)lpfc_cmd->prot_data;
3994                         break;
3995                 case LPFC_INJERR_GUARD:
3996                         src->guard_tag =
3997                                 (uint16_t)lpfc_cmd->prot_data;
3998                         break;
3999                 default:
4000                         break;
4001                 }
4002
4003                 lpfc_cmd->prot_data = 0;
4004                 lpfc_cmd->prot_data_type = 0;
4005                 lpfc_cmd->prot_data_segment = NULL;
4006         }
4007 #endif
4008
4009         if (lpfc_cmd->status) {
4010                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4011                     (lpfc_cmd->result & IOERR_DRVR_MASK))
4012                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4013                 else if (lpfc_cmd->status >= IOSTAT_CNT)
4014                         lpfc_cmd->status = IOSTAT_DEFAULT;
4015                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4016                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
4017                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4018                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4019                         logit = 0;
4020                 else
4021                         logit = LOG_FCP | LOG_FCP_UNDER;
4022                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4023                          "9030 FCP cmd x%x failed <%d/%lld> "
4024                          "status: x%x result: x%x "
4025                          "sid: x%x did: x%x oxid: x%x "
4026                          "Data: x%x x%x\n",
4027                          cmd->cmnd[0],
4028                          cmd->device ? cmd->device->id : 0xffff,
4029                          cmd->device ? cmd->device->lun : 0xffff,
4030                          lpfc_cmd->status, lpfc_cmd->result,
4031                          vport->fc_myDID,
4032                          (pnode) ? pnode->nlp_DID : 0,
4033                          phba->sli_rev == LPFC_SLI_REV4 ?
4034                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4035                          pIocbOut->iocb.ulpContext,
4036                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4037
4038                 switch (lpfc_cmd->status) {
4039                 case IOSTAT_FCP_RSP_ERROR:
4040                         /* Call FCP RSP handler to determine result */
4041                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4042                         break;
4043                 case IOSTAT_NPORT_BSY:
4044                 case IOSTAT_FABRIC_BSY:
4045                         cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4046                         fast_path_evt = lpfc_alloc_fast_evt(phba);
4047                         if (!fast_path_evt)
4048                                 break;
4049                         fast_path_evt->un.fabric_evt.event_type =
4050                                 FC_REG_FABRIC_EVENT;
4051                         fast_path_evt->un.fabric_evt.subcategory =
4052                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4053                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4054                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4055                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4056                                         &pnode->nlp_portname,
4057                                         sizeof(struct lpfc_name));
4058                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4059                                         &pnode->nlp_nodename,
4060                                         sizeof(struct lpfc_name));
4061                         }
4062                         fast_path_evt->vport = vport;
4063                         fast_path_evt->work_evt.evt =
4064                                 LPFC_EVT_FASTPATH_MGMT_EVT;
4065                         spin_lock_irqsave(&phba->hbalock, flags);
4066                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
4067                                 &phba->work_list);
4068                         spin_unlock_irqrestore(&phba->hbalock, flags);
4069                         lpfc_worker_wake_up(phba);
4070                         break;
4071                 case IOSTAT_LOCAL_REJECT:
4072                 case IOSTAT_REMOTE_STOP:
4073                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4074                             lpfc_cmd->result ==
4075                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4076                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4077                             lpfc_cmd->result ==
4078                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4079                                 cmd->result = DID_NO_CONNECT << 16;
4080                                 break;
4081                         }
4082                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4083                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4084                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4085                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4086                                 cmd->result = DID_REQUEUE << 16;
4087                                 break;
4088                         }
4089                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4090                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4091                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4092                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4093                                         /*
4094                                          * This is a response for a BG enabled
4095                                          * cmd. Parse BG error
4096                                          */
4097                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4098                                                         pIocbOut);
4099                                         break;
4100                                 } else {
4101                                         lpfc_printf_vlog(vport, KERN_WARNING,
4102                                                         LOG_BG,
4103                                                         "9031 non-zero BGSTAT "
4104                                                         "on unprotected cmd\n");
4105                                 }
4106                         }
4107                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4108                                 && (phba->sli_rev == LPFC_SLI_REV4)
4109                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4110                                 /* This IO was aborted by the target, we don't
4111                                  * know the rxid and because we did not send the
4112                                  * ABTS we cannot generate and RRQ.
4113                                  */
4114                                 lpfc_set_rrq_active(phba, pnode,
4115                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4116                                         0, 0);
4117                         }
4118                 /* else: fall through */
4119                 default:
4120                         cmd->result = DID_ERROR << 16;
4121                         break;
4122                 }
4123
4124                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4125                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4126                         cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
4127                                       SAM_STAT_BUSY;
4128         } else
4129                 cmd->result = DID_OK << 16;
4130
4131         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4132                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4133
4134                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4135                                  "0710 Iodone <%d/%llu> cmd %p, error "
4136                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4137                                  cmd->device->id, cmd->device->lun, cmd,
4138                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4139                                  scsi_get_resid(cmd));
4140         }
4141
4142         lpfc_update_stats(phba, lpfc_cmd);
4143         if (vport->cfg_max_scsicmpl_time &&
4144            time_after(jiffies, lpfc_cmd->start_time +
4145                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4146                 spin_lock_irqsave(shost->host_lock, flags);
4147                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4148                         if (pnode->cmd_qdepth >
4149                                 atomic_read(&pnode->cmd_pending) &&
4150                                 (atomic_read(&pnode->cmd_pending) >
4151                                 LPFC_MIN_TGT_QDEPTH) &&
4152                                 ((cmd->cmnd[0] == READ_10) ||
4153                                 (cmd->cmnd[0] == WRITE_10)))
4154                                 pnode->cmd_qdepth =
4155                                         atomic_read(&pnode->cmd_pending);
4156
4157                         pnode->last_change_time = jiffies;
4158                 }
4159                 spin_unlock_irqrestore(shost->host_lock, flags);
4160         }
4161         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4162
4163         /* If pCmd was set to NULL from abort path, do not call scsi_done */
4164         if (xchg(&lpfc_cmd->pCmd, NULL) == NULL) {
4165                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4166                                  "0711 FCP cmd already NULL, sid: 0x%06x, "
4167                                  "did: 0x%06x, oxid: 0x%04x\n",
4168                                  vport->fc_myDID,
4169                                  (pnode) ? pnode->nlp_DID : 0,
4170                                  phba->sli_rev == LPFC_SLI_REV4 ?
4171                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff);
4172                 return;
4173         }
4174
4175         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4176         cmd->scsi_done(cmd);
4177
4178         /*
4179          * If there is a thread waiting for command completion
4180          * wake up the thread.
4181          */
4182         spin_lock_irqsave(shost->host_lock, flags);
4183         if (lpfc_cmd->waitq)
4184                 wake_up(lpfc_cmd->waitq);
4185         spin_unlock_irqrestore(shost->host_lock, flags);
4186
4187         lpfc_release_scsi_buf(phba, lpfc_cmd);
4188 }
4189
4190 /**
4191  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4192  * @data: A pointer to the immediate command data portion of the IOCB.
4193  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4194  *
4195  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4196  * byte swapping the data to big endian format for transmission on the wire.
4197  **/
4198 static void
4199 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4200 {
4201         int i, j;
4202         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4203              i += sizeof(uint32_t), j++) {
4204                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4205         }
4206 }
4207
4208 /**
4209  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4210  * @vport: The virtual port for which this call is being executed.
4211  * @lpfc_cmd: The scsi command which needs to send.
4212  * @pnode: Pointer to lpfc_nodelist.
4213  *
4214  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4215  * to transfer for device with SLI3 interface spec.
4216  **/
4217 static void
4218 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4219                     struct lpfc_nodelist *pnode)
4220 {
4221         struct lpfc_hba *phba = vport->phba;
4222         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4223         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4224         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4225         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4226         int datadir = scsi_cmnd->sc_data_direction;
4227         uint8_t *ptr;
4228         bool sli4;
4229         uint32_t fcpdl;
4230
4231         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4232                 return;
4233
4234         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4235         /* clear task management bits */
4236         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4237
4238         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4239                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4240
4241         ptr = &fcp_cmnd->fcpCdb[0];
4242         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4243         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4244                 ptr += scsi_cmnd->cmd_len;
4245                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4246         }
4247
4248         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4249
4250         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4251         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4252
4253         /*
4254          * There are three possibilities here - use scatter-gather segment, use
4255          * the single mapping, or neither.  Start the lpfc command prep by
4256          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4257          * data bde entry.
4258          */
4259         if (scsi_sg_count(scsi_cmnd)) {
4260                 if (datadir == DMA_TO_DEVICE) {
4261                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4262                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4263                         if (vport->cfg_first_burst_size &&
4264                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4265                                 fcpdl = scsi_bufflen(scsi_cmnd);
4266                                 if (fcpdl < vport->cfg_first_burst_size)
4267                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4268                                 else
4269                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4270                                                 vport->cfg_first_burst_size;
4271                         }
4272                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4273                         atomic_inc(&phba->fc4ScsiOutputRequests);
4274                 } else {
4275                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4276                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4277                         fcp_cmnd->fcpCntl3 = READ_DATA;
4278                         atomic_inc(&phba->fc4ScsiInputRequests);
4279                 }
4280         } else {
4281                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4282                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4283                 iocb_cmd->ulpPU = 0;
4284                 fcp_cmnd->fcpCntl3 = 0;
4285                 atomic_inc(&phba->fc4ScsiControlRequests);
4286         }
4287         if (phba->sli_rev == 3 &&
4288             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4289                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4290         /*
4291          * Finish initializing those IOCB fields that are independent
4292          * of the scsi_cmnd request_buffer
4293          */
4294         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4295         if (sli4)
4296                 piocbq->iocb.ulpContext =
4297                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4298         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4299                 piocbq->iocb.ulpFCP2Rcvy = 1;
4300         else
4301                 piocbq->iocb.ulpFCP2Rcvy = 0;
4302
4303         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4304         piocbq->context1  = lpfc_cmd;
4305         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4306         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4307         piocbq->vport = vport;
4308 }
4309
4310 /**
4311  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4312  * @vport: The virtual port for which this call is being executed.
4313  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4314  * @lun: Logical unit number.
4315  * @task_mgmt_cmd: SCSI task management command.
4316  *
4317  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4318  * for device with SLI-3 interface spec.
4319  *
4320  * Return codes:
4321  *   0 - Error
4322  *   1 - Success
4323  **/
4324 static int
4325 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4326                              struct lpfc_scsi_buf *lpfc_cmd,
4327                              uint64_t lun,
4328                              uint8_t task_mgmt_cmd)
4329 {
4330         struct lpfc_iocbq *piocbq;
4331         IOCB_t *piocb;
4332         struct fcp_cmnd *fcp_cmnd;
4333         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4334         struct lpfc_nodelist *ndlp = rdata->pnode;
4335
4336         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4337             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4338                 return 0;
4339
4340         piocbq = &(lpfc_cmd->cur_iocbq);
4341         piocbq->vport = vport;
4342
4343         piocb = &piocbq->iocb;
4344
4345         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4346         /* Clear out any old data in the FCP command area */
4347         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4348         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4349         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4350         if (vport->phba->sli_rev == 3 &&
4351             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4352                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4353         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4354         piocb->ulpContext = ndlp->nlp_rpi;
4355         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4356                 piocb->ulpContext =
4357                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4358         }
4359         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4360         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4361         piocb->ulpPU = 0;
4362         piocb->un.fcpi.fcpi_parm = 0;
4363
4364         /* ulpTimeout is only one byte */
4365         if (lpfc_cmd->timeout > 0xff) {
4366                 /*
4367                  * Do not timeout the command at the firmware level.
4368                  * The driver will provide the timeout mechanism.
4369                  */
4370                 piocb->ulpTimeout = 0;
4371         } else
4372                 piocb->ulpTimeout = lpfc_cmd->timeout;
4373
4374         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4375                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4376
4377         return 1;
4378 }
4379
4380 /**
4381  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4382  * @phba: The hba struct for which this call is being executed.
4383  * @dev_grp: The HBA PCI-Device group number.
4384  *
4385  * This routine sets up the SCSI interface API function jump table in @phba
4386  * struct.
4387  * Returns: 0 - success, -ENODEV - failure.
4388  **/
4389 int
4390 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4391 {
4392
4393         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4394         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4395
4396         switch (dev_grp) {
4397         case LPFC_PCI_DEV_LP:
4398                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4399                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4400                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4401                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4402                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4403                 break;
4404         case LPFC_PCI_DEV_OC:
4405                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4406                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4407                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4408                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4409                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4410                 break;
4411         default:
4412                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4413                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4414                                 dev_grp);
4415                 return -ENODEV;
4416                 break;
4417         }
4418         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4419         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4420         return 0;
4421 }
4422
4423 /**
4424  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4425  * @phba: The Hba for which this call is being executed.
4426  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4427  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4428  *
4429  * This routine is IOCB completion routine for device reset and target reset
4430  * routine. This routine release scsi buffer associated with lpfc_cmd.
4431  **/
4432 static void
4433 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4434                         struct lpfc_iocbq *cmdiocbq,
4435                         struct lpfc_iocbq *rspiocbq)
4436 {
4437         struct lpfc_scsi_buf *lpfc_cmd =
4438                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4439         if (lpfc_cmd)
4440                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4441         return;
4442 }
4443
4444 /**
4445  * lpfc_info - Info entry point of scsi_host_template data structure
4446  * @host: The scsi host for which this call is being executed.
4447  *
4448  * This routine provides module information about hba.
4449  *
4450  * Reutrn code:
4451  *   Pointer to char - Success.
4452  **/
4453 const char *
4454 lpfc_info(struct Scsi_Host *host)
4455 {
4456         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4457         struct lpfc_hba   *phba = vport->phba;
4458         int len, link_speed = 0;
4459         static char  lpfcinfobuf[384];
4460
4461         memset(lpfcinfobuf,0,384);
4462         if (phba && phba->pcidev){
4463                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4464                 len = strlen(lpfcinfobuf);
4465                 snprintf(lpfcinfobuf + len,
4466                         384-len,
4467                         " on PCI bus %02x device %02x irq %d",
4468                         phba->pcidev->bus->number,
4469                         phba->pcidev->devfn,
4470                         phba->pcidev->irq);
4471                 len = strlen(lpfcinfobuf);
4472                 if (phba->Port[0]) {
4473                         snprintf(lpfcinfobuf + len,
4474                                  384-len,
4475                                  " port %s",
4476                                  phba->Port);
4477                 }
4478                 len = strlen(lpfcinfobuf);
4479                 link_speed = lpfc_sli_port_speed_get(phba);
4480                 if (link_speed != 0)
4481                         snprintf(lpfcinfobuf + len, 384-len,
4482                                  " Logical Link Speed: %d Mbps", link_speed);
4483         }
4484         return lpfcinfobuf;
4485 }
4486
4487 /**
4488  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4489  * @phba: The Hba for which this call is being executed.
4490  *
4491  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4492  * The default value of cfg_poll_tmo is 10 milliseconds.
4493  **/
4494 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4495 {
4496         unsigned long  poll_tmo_expires =
4497                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4498
4499         if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4500                 mod_timer(&phba->fcp_poll_timer,
4501                           poll_tmo_expires);
4502 }
4503
4504 /**
4505  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4506  * @phba: The Hba for which this call is being executed.
4507  *
4508  * This routine starts the fcp_poll_timer of @phba.
4509  **/
4510 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4511 {
4512         lpfc_poll_rearm_timer(phba);
4513 }
4514
4515 /**
4516  * lpfc_poll_timeout - Restart polling timer
4517  * @ptr: Map to lpfc_hba data structure pointer.
4518  *
4519  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4520  * and FCP Ring interrupt is disable.
4521  **/
4522
4523 void lpfc_poll_timeout(struct timer_list *t)
4524 {
4525         struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4526
4527         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4528                 lpfc_sli_handle_fast_ring_event(phba,
4529                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4530
4531                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4532                         lpfc_poll_rearm_timer(phba);
4533         }
4534 }
4535
4536 /**
4537  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4538  * @cmnd: Pointer to scsi_cmnd data structure.
4539  * @done: Pointer to done routine.
4540  *
4541  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4542  * This routine prepares an IOCB from scsi command and provides to firmware.
4543  * The @done callback is invoked after driver finished processing the command.
4544  *
4545  * Return value :
4546  *   0 - Success
4547  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4548  **/
4549 static int
4550 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4551 {
4552         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4553         struct lpfc_hba   *phba = vport->phba;
4554         struct lpfc_rport_data *rdata;
4555         struct lpfc_nodelist *ndlp;
4556         struct lpfc_scsi_buf *lpfc_cmd;
4557         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4558         int err;
4559
4560         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4561
4562         /* sanity check on references */
4563         if (unlikely(!rdata) || unlikely(!rport))
4564                 goto out_fail_command;
4565
4566         err = fc_remote_port_chkready(rport);
4567         if (err) {
4568                 cmnd->result = err;
4569                 goto out_fail_command;
4570         }
4571         ndlp = rdata->pnode;
4572
4573         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4574                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4575
4576                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4577                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4578                                 " op:%02x str=%s without registering for"
4579                                 " BlockGuard - Rejecting command\n",
4580                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4581                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4582                 goto out_fail_command;
4583         }
4584
4585         /*
4586          * Catch race where our node has transitioned, but the
4587          * transport is still transitioning.
4588          */
4589         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4590                 goto out_tgt_busy;
4591         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
4592                 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
4593                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4594                                          "3377 Target Queue Full, scsi Id:%d "
4595                                          "Qdepth:%d Pending command:%d"
4596                                          " WWNN:%02x:%02x:%02x:%02x:"
4597                                          "%02x:%02x:%02x:%02x, "
4598                                          " WWPN:%02x:%02x:%02x:%02x:"
4599                                          "%02x:%02x:%02x:%02x",
4600                                          ndlp->nlp_sid, ndlp->cmd_qdepth,
4601                                          atomic_read(&ndlp->cmd_pending),
4602                                          ndlp->nlp_nodename.u.wwn[0],
4603                                          ndlp->nlp_nodename.u.wwn[1],
4604                                          ndlp->nlp_nodename.u.wwn[2],
4605                                          ndlp->nlp_nodename.u.wwn[3],
4606                                          ndlp->nlp_nodename.u.wwn[4],
4607                                          ndlp->nlp_nodename.u.wwn[5],
4608                                          ndlp->nlp_nodename.u.wwn[6],
4609                                          ndlp->nlp_nodename.u.wwn[7],
4610                                          ndlp->nlp_portname.u.wwn[0],
4611                                          ndlp->nlp_portname.u.wwn[1],
4612                                          ndlp->nlp_portname.u.wwn[2],
4613                                          ndlp->nlp_portname.u.wwn[3],
4614                                          ndlp->nlp_portname.u.wwn[4],
4615                                          ndlp->nlp_portname.u.wwn[5],
4616                                          ndlp->nlp_portname.u.wwn[6],
4617                                          ndlp->nlp_portname.u.wwn[7]);
4618                         goto out_tgt_busy;
4619                 }
4620         }
4621
4622         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4623         if (lpfc_cmd == NULL) {
4624                 lpfc_rampdown_queue_depth(phba);
4625
4626                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4627                                  "0707 driver's buffer pool is empty, "
4628                                  "IO busied\n");
4629                 goto out_host_busy;
4630         }
4631
4632         /*
4633          * Store the midlayer's command structure for the completion phase
4634          * and complete the command initialization.
4635          */
4636         lpfc_cmd->pCmd  = cmnd;
4637         lpfc_cmd->rdata = rdata;
4638         lpfc_cmd->ndlp = ndlp;
4639         lpfc_cmd->timeout = 0;
4640         lpfc_cmd->start_time = jiffies;
4641         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4642
4643         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4644                 if (vport->phba->cfg_enable_bg) {
4645                         lpfc_printf_vlog(vport,
4646                                          KERN_INFO, LOG_SCSI_CMD,
4647                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4648                                          "sector x%llx cnt %u pt %x\n",
4649                                          dif_op_str[scsi_get_prot_op(cmnd)],
4650                                          cmnd->cmnd[0],
4651                                          (unsigned long long)scsi_get_lba(cmnd),
4652                                          blk_rq_sectors(cmnd->request),
4653                                          (cmnd->cmnd[1]>>5));
4654                 }
4655                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4656         } else {
4657                 if (vport->phba->cfg_enable_bg) {
4658                         lpfc_printf_vlog(vport,
4659                                          KERN_INFO, LOG_SCSI_CMD,
4660                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4661                                          "x%x sector x%llx cnt %u pt %x\n",
4662                                          cmnd->cmnd[0],
4663                                          (unsigned long long)scsi_get_lba(cmnd),
4664                                          blk_rq_sectors(cmnd->request),
4665                                          (cmnd->cmnd[1]>>5));
4666                 }
4667                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4668         }
4669
4670         if (err)
4671                 goto out_host_busy_free_buf;
4672
4673         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4674
4675         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4676                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4677         if (err) {
4678                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4679                                  "3376 FCP could not issue IOCB err %x"
4680                                  "FCP cmd x%x <%d/%llu> "
4681                                  "sid: x%x did: x%x oxid: x%x "
4682                                  "Data: x%x x%x x%x x%x\n",
4683                                  err, cmnd->cmnd[0],
4684                                  cmnd->device ? cmnd->device->id : 0xffff,
4685                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4686                                  vport->fc_myDID, ndlp->nlp_DID,
4687                                  phba->sli_rev == LPFC_SLI_REV4 ?
4688                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4689                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4690                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4691                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4692                                  (uint32_t)
4693                                  (cmnd->request->timeout / 1000));
4694
4695                 switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
4696                 case WRITE_DATA:
4697                         atomic_dec(&phba->fc4ScsiOutputRequests);
4698                         break;
4699                 case READ_DATA:
4700                         atomic_dec(&phba->fc4ScsiInputRequests);
4701                         break;
4702                 default:
4703                         atomic_dec(&phba->fc4ScsiControlRequests);
4704                 }
4705                 goto out_host_busy_free_buf;
4706         }
4707         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4708                 lpfc_sli_handle_fast_ring_event(phba,
4709                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4710
4711                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4712                         lpfc_poll_rearm_timer(phba);
4713         }
4714
4715         return 0;
4716
4717  out_host_busy_free_buf:
4718         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4719         lpfc_release_scsi_buf(phba, lpfc_cmd);
4720  out_host_busy:
4721         return SCSI_MLQUEUE_HOST_BUSY;
4722
4723  out_tgt_busy:
4724         return SCSI_MLQUEUE_TARGET_BUSY;
4725
4726  out_fail_command:
4727         cmnd->scsi_done(cmnd);
4728         return 0;
4729 }
4730
4731
4732 /**
4733  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4734  * @cmnd: Pointer to scsi_cmnd data structure.
4735  *
4736  * This routine aborts @cmnd pending in base driver.
4737  *
4738  * Return code :
4739  *   0x2003 - Error
4740  *   0x2002 - Success
4741  **/
4742 static int
4743 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4744 {
4745         struct Scsi_Host  *shost = cmnd->device->host;
4746         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4747         struct lpfc_hba   *phba = vport->phba;
4748         struct lpfc_iocbq *iocb;
4749         struct lpfc_iocbq *abtsiocb;
4750         struct lpfc_scsi_buf *lpfc_cmd;
4751         IOCB_t *cmd, *icmd;
4752         int ret = SUCCESS, status = 0;
4753         struct lpfc_sli_ring *pring_s4 = NULL;
4754         int ret_val;
4755         unsigned long flags;
4756         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4757
4758         status = fc_block_scsi_eh(cmnd);
4759         if (status != 0 && status != SUCCESS)
4760                 return status;
4761
4762         spin_lock_irqsave(&phba->hbalock, flags);
4763         /* driver queued commands are in process of being flushed */
4764         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4765                 spin_unlock_irqrestore(&phba->hbalock, flags);
4766                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4767                         "3168 SCSI Layer abort requested I/O has been "
4768                         "flushed by LLD.\n");
4769                 return FAILED;
4770         }
4771
4772         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4773         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4774                 spin_unlock_irqrestore(&phba->hbalock, flags);
4775                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4776                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4777                          "x%x ID %d LUN %llu\n",
4778                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4779                 return SUCCESS;
4780         }
4781
4782         iocb = &lpfc_cmd->cur_iocbq;
4783         if (phba->sli_rev == LPFC_SLI_REV4) {
4784                 if (!(phba->cfg_fof) ||
4785                     (!(iocb->iocb_flag & LPFC_IO_FOF))) {
4786                         pring_s4 =
4787                                 phba->sli4_hba.fcp_wq[iocb->hba_wqidx]->pring;
4788                 } else {
4789                         iocb->hba_wqidx = 0;
4790                         pring_s4 = phba->sli4_hba.oas_wq->pring;
4791                 }
4792                 if (!pring_s4) {
4793                         ret = FAILED;
4794                         goto out_unlock;
4795                 }
4796                 spin_lock(&pring_s4->ring_lock);
4797         }
4798         /* the command is in process of being cancelled */
4799         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4800                 if (phba->sli_rev == LPFC_SLI_REV4)
4801                         spin_unlock(&pring_s4->ring_lock);
4802                 spin_unlock_irqrestore(&phba->hbalock, flags);
4803                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4804                         "3169 SCSI Layer abort requested I/O has been "
4805                         "cancelled by LLD.\n");
4806                 return FAILED;
4807         }
4808         /*
4809          * If pCmd field of the corresponding lpfc_scsi_buf structure
4810          * points to a different SCSI command, then the driver has
4811          * already completed this command, but the midlayer did not
4812          * see the completion before the eh fired. Just return SUCCESS.
4813          */
4814         if (lpfc_cmd->pCmd != cmnd) {
4815                 if (phba->sli_rev == LPFC_SLI_REV4)
4816                         spin_unlock(&pring_s4->ring_lock);
4817                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4818                         "3170 SCSI Layer abort requested I/O has been "
4819                         "completed by LLD.\n");
4820                 goto out_unlock;
4821         }
4822
4823         BUG_ON(iocb->context1 != lpfc_cmd);
4824
4825         /* abort issued in recovery is still in progress */
4826         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4827                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4828                          "3389 SCSI Layer I/O Abort Request is pending\n");
4829                 if (phba->sli_rev == LPFC_SLI_REV4)
4830                         spin_unlock(&pring_s4->ring_lock);
4831                 spin_unlock_irqrestore(&phba->hbalock, flags);
4832                 goto wait_for_cmpl;
4833         }
4834
4835         abtsiocb = __lpfc_sli_get_iocbq(phba);
4836         if (abtsiocb == NULL) {
4837                 ret = FAILED;
4838                 if (phba->sli_rev == LPFC_SLI_REV4)
4839                         spin_unlock(&pring_s4->ring_lock);
4840                 goto out_unlock;
4841         }
4842
4843         /* Indicate the IO is being aborted by the driver. */
4844         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4845
4846         /*
4847          * The scsi command can not be in txq and it is in flight because the
4848          * pCmd is still pointig at the SCSI command we have to abort. There
4849          * is no need to search the txcmplq. Just send an abort to the FW.
4850          */
4851
4852         cmd = &iocb->iocb;
4853         icmd = &abtsiocb->iocb;
4854         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4855         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4856         if (phba->sli_rev == LPFC_SLI_REV4)
4857                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4858         else
4859                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4860
4861         icmd->ulpLe = 1;
4862         icmd->ulpClass = cmd->ulpClass;
4863
4864         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4865         abtsiocb->hba_wqidx = iocb->hba_wqidx;
4866         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4867         if (iocb->iocb_flag & LPFC_IO_FOF)
4868                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4869
4870         if (lpfc_is_link_up(phba))
4871                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4872         else
4873                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4874
4875         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4876         abtsiocb->vport = vport;
4877         lpfc_cmd->waitq = &waitq;
4878         if (phba->sli_rev == LPFC_SLI_REV4) {
4879                 /* Note: both hbalock and ring_lock must be set here */
4880                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4881                                                 abtsiocb, 0);
4882                 spin_unlock(&pring_s4->ring_lock);
4883         } else {
4884                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4885                                                 abtsiocb, 0);
4886         }
4887         /* no longer need the lock after this point */
4888         spin_unlock_irqrestore(&phba->hbalock, flags);
4889
4890
4891         if (ret_val == IOCB_ERROR) {
4892                 if (phba->sli_rev == LPFC_SLI_REV4)
4893                         spin_lock_irqsave(&pring_s4->ring_lock, flags);
4894                 else
4895                         spin_lock_irqsave(&phba->hbalock, flags);
4896                 /* Indicate the IO is not being aborted by the driver. */
4897                 iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
4898                 lpfc_cmd->waitq = NULL;
4899                 if (phba->sli_rev == LPFC_SLI_REV4)
4900                         spin_unlock_irqrestore(&pring_s4->ring_lock, flags);
4901                 else
4902                         spin_unlock_irqrestore(&phba->hbalock, flags);
4903                 lpfc_sli_release_iocbq(phba, abtsiocb);
4904                 ret = FAILED;
4905                 goto out;
4906         }
4907
4908         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4909                 lpfc_sli_handle_fast_ring_event(phba,
4910                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4911
4912 wait_for_cmpl:
4913         /* Wait for abort to complete */
4914         wait_event_timeout(waitq,
4915                           (lpfc_cmd->pCmd != cmnd),
4916                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4917
4918         spin_lock_irqsave(shost->host_lock, flags);
4919         lpfc_cmd->waitq = NULL;
4920         spin_unlock_irqrestore(shost->host_lock, flags);
4921
4922         if (lpfc_cmd->pCmd == cmnd) {
4923                 ret = FAILED;
4924                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4925                                  "0748 abort handler timed out waiting "
4926                                  "for aborting I/O (xri:x%x) to complete: "
4927                                  "ret %#x, ID %d, LUN %llu\n",
4928                                  iocb->sli4_xritag, ret,
4929                                  cmnd->device->id, cmnd->device->lun);
4930         }
4931         goto out;
4932
4933 out_unlock:
4934         spin_unlock_irqrestore(&phba->hbalock, flags);
4935 out:
4936         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4937                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4938                          "LUN %llu\n", ret, cmnd->device->id,
4939                          cmnd->device->lun);
4940         return ret;
4941 }
4942
4943 static char *
4944 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4945 {
4946         switch (task_mgmt_cmd) {
4947         case FCP_ABORT_TASK_SET:
4948                 return "ABORT_TASK_SET";
4949         case FCP_CLEAR_TASK_SET:
4950                 return "FCP_CLEAR_TASK_SET";
4951         case FCP_BUS_RESET:
4952                 return "FCP_BUS_RESET";
4953         case FCP_LUN_RESET:
4954                 return "FCP_LUN_RESET";
4955         case FCP_TARGET_RESET:
4956                 return "FCP_TARGET_RESET";
4957         case FCP_CLEAR_ACA:
4958                 return "FCP_CLEAR_ACA";
4959         case FCP_TERMINATE_TASK:
4960                 return "FCP_TERMINATE_TASK";
4961         default:
4962                 return "unknown";
4963         }
4964 }
4965
4966
4967 /**
4968  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4969  * @vport: The virtual port for which this call is being executed.
4970  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4971  *
4972  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4973  *
4974  * Return code :
4975  *   0x2003 - Error
4976  *   0x2002 - Success
4977  **/
4978 static int
4979 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4980 {
4981         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4982         uint32_t rsp_info;
4983         uint32_t rsp_len;
4984         uint8_t  rsp_info_code;
4985         int ret = FAILED;
4986
4987
4988         if (fcprsp == NULL)
4989                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4990                                  "0703 fcp_rsp is missing\n");
4991         else {
4992                 rsp_info = fcprsp->rspStatus2;
4993                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4994                 rsp_info_code = fcprsp->rspInfo3;
4995
4996
4997                 lpfc_printf_vlog(vport, KERN_INFO,
4998                                  LOG_FCP,
4999                                  "0706 fcp_rsp valid 0x%x,"
5000                                  " rsp len=%d code 0x%x\n",
5001                                  rsp_info,
5002                                  rsp_len, rsp_info_code);
5003
5004                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
5005                         switch (rsp_info_code) {
5006                         case RSP_NO_FAILURE:
5007                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5008                                                  "0715 Task Mgmt No Failure\n");
5009                                 ret = SUCCESS;
5010                                 break;
5011                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
5012                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5013                                                  "0716 Task Mgmt Target "
5014                                                 "reject\n");
5015                                 break;
5016                         case RSP_TM_NOT_COMPLETED: /* TM failed */
5017                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5018                                                  "0717 Task Mgmt Target "
5019                                                 "failed TM\n");
5020                                 break;
5021                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
5022                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5023                                                  "0718 Task Mgmt to invalid "
5024                                                 "LUN\n");
5025                                 break;
5026                         }
5027                 }
5028         }
5029         return ret;
5030 }
5031
5032
5033 /**
5034  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
5035  * @vport: The virtual port for which this call is being executed.
5036  * @rdata: Pointer to remote port local data
5037  * @tgt_id: Target ID of remote device.
5038  * @lun_id: Lun number for the TMF
5039  * @task_mgmt_cmd: type of TMF to send
5040  *
5041  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
5042  * a remote port.
5043  *
5044  * Return Code:
5045  *   0x2003 - Error
5046  *   0x2002 - Success.
5047  **/
5048 static int
5049 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
5050                    unsigned int tgt_id, uint64_t lun_id,
5051                    uint8_t task_mgmt_cmd)
5052 {
5053         struct lpfc_hba   *phba = vport->phba;
5054         struct lpfc_scsi_buf *lpfc_cmd;
5055         struct lpfc_iocbq *iocbq;
5056         struct lpfc_iocbq *iocbqrsp;
5057         struct lpfc_rport_data *rdata;
5058         struct lpfc_nodelist *pnode;
5059         int ret;
5060         int status;
5061
5062         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5063         if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5064                 return FAILED;
5065         pnode = rdata->pnode;
5066
5067         lpfc_cmd = lpfc_get_scsi_buf(phba, pnode);
5068         if (lpfc_cmd == NULL)
5069                 return FAILED;
5070         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5071         lpfc_cmd->rdata = rdata;
5072         lpfc_cmd->pCmd = cmnd;
5073         lpfc_cmd->ndlp = pnode;
5074
5075         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
5076                                            task_mgmt_cmd);
5077         if (!status) {
5078                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5079                 return FAILED;
5080         }
5081
5082         iocbq = &lpfc_cmd->cur_iocbq;
5083         iocbqrsp = lpfc_sli_get_iocbq(phba);
5084         if (iocbqrsp == NULL) {
5085                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5086                 return FAILED;
5087         }
5088         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5089
5090         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5091                          "0702 Issue %s to TGT %d LUN %llu "
5092                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5093                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5094                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5095                          iocbq->iocb_flag);
5096
5097         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5098                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5099         if ((status != IOCB_SUCCESS) ||
5100             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5101                 if (status != IOCB_SUCCESS ||
5102                     iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5103                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5104                                          "0727 TMF %s to TGT %d LUN %llu "
5105                                          "failed (%d, %d) iocb_flag x%x\n",
5106                                          lpfc_taskmgmt_name(task_mgmt_cmd),
5107                                          tgt_id, lun_id,
5108                                          iocbqrsp->iocb.ulpStatus,
5109                                          iocbqrsp->iocb.un.ulpWord[4],
5110                                          iocbq->iocb_flag);
5111                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5112                 if (status == IOCB_SUCCESS) {
5113                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5114                                 /* Something in the FCP_RSP was invalid.
5115                                  * Check conditions */
5116                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5117                         else
5118                                 ret = FAILED;
5119                 } else if (status == IOCB_TIMEDOUT) {
5120                         ret = TIMEOUT_ERROR;
5121                 } else {
5122                         ret = FAILED;
5123                 }
5124         } else
5125                 ret = SUCCESS;
5126
5127         lpfc_sli_release_iocbq(phba, iocbqrsp);
5128
5129         if (ret != TIMEOUT_ERROR)
5130                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5131
5132         return ret;
5133 }
5134
5135 /**
5136  * lpfc_chk_tgt_mapped -
5137  * @vport: The virtual port to check on
5138  * @cmnd: Pointer to scsi_cmnd data structure.
5139  *
5140  * This routine delays until the scsi target (aka rport) for the
5141  * command exists (is present and logged in) or we declare it non-existent.
5142  *
5143  * Return code :
5144  *  0x2003 - Error
5145  *  0x2002 - Success
5146  **/
5147 static int
5148 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5149 {
5150         struct lpfc_rport_data *rdata;
5151         struct lpfc_nodelist *pnode;
5152         unsigned long later;
5153
5154         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5155         if (!rdata) {
5156                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5157                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5158                 return FAILED;
5159         }
5160         pnode = rdata->pnode;
5161         /*
5162          * If target is not in a MAPPED state, delay until
5163          * target is rediscovered or devloss timeout expires.
5164          */
5165         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5166         while (time_after(later, jiffies)) {
5167                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5168                         return FAILED;
5169                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5170                         return SUCCESS;
5171                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5172                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5173                 if (!rdata)
5174                         return FAILED;
5175                 pnode = rdata->pnode;
5176         }
5177         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5178             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5179                 return FAILED;
5180         return SUCCESS;
5181 }
5182
5183 /**
5184  * lpfc_reset_flush_io_context -
5185  * @vport: The virtual port (scsi_host) for the flush context
5186  * @tgt_id: If aborting by Target contect - specifies the target id
5187  * @lun_id: If aborting by Lun context - specifies the lun id
5188  * @context: specifies the context level to flush at.
5189  *
5190  * After a reset condition via TMF, we need to flush orphaned i/o
5191  * contexts from the adapter. This routine aborts any contexts
5192  * outstanding, then waits for their completions. The wait is
5193  * bounded by devloss_tmo though.
5194  *
5195  * Return code :
5196  *  0x2003 - Error
5197  *  0x2002 - Success
5198  **/
5199 static int
5200 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5201                         uint64_t lun_id, lpfc_ctx_cmd context)
5202 {
5203         struct lpfc_hba   *phba = vport->phba;
5204         unsigned long later;
5205         int cnt;
5206
5207         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5208         if (cnt)
5209                 lpfc_sli_abort_taskmgmt(vport,
5210                                         &phba->sli.sli3_ring[LPFC_FCP_RING],
5211                                         tgt_id, lun_id, context);
5212         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5213         while (time_after(later, jiffies) && cnt) {
5214                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5215                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5216         }
5217         if (cnt) {
5218                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5219                         "0724 I/O flush failure for context %s : cnt x%x\n",
5220                         ((context == LPFC_CTX_LUN) ? "LUN" :
5221                          ((context == LPFC_CTX_TGT) ? "TGT" :
5222                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5223                         cnt);
5224                 return FAILED;
5225         }
5226         return SUCCESS;
5227 }
5228
5229 /**
5230  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5231  * @cmnd: Pointer to scsi_cmnd data structure.
5232  *
5233  * This routine does a device reset by sending a LUN_RESET task management
5234  * command.
5235  *
5236  * Return code :
5237  *  0x2003 - Error
5238  *  0x2002 - Success
5239  **/
5240 static int
5241 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5242 {
5243         struct Scsi_Host  *shost = cmnd->device->host;
5244         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5245         struct lpfc_rport_data *rdata;
5246         struct lpfc_nodelist *pnode;
5247         unsigned tgt_id = cmnd->device->id;
5248         uint64_t lun_id = cmnd->device->lun;
5249         struct lpfc_scsi_event_header scsi_event;
5250         int status;
5251
5252         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5253         if (!rdata || !rdata->pnode) {
5254                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5255                                  "0798 Device Reset rport failure: rdata x%p\n",
5256                                  rdata);
5257                 return FAILED;
5258         }
5259         pnode = rdata->pnode;
5260         status = fc_block_scsi_eh(cmnd);
5261         if (status != 0 && status != SUCCESS)
5262                 return status;
5263
5264         status = lpfc_chk_tgt_mapped(vport, cmnd);
5265         if (status == FAILED) {
5266                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5267                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5268                 return FAILED;
5269         }
5270
5271         scsi_event.event_type = FC_REG_SCSI_EVENT;
5272         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5273         scsi_event.lun = lun_id;
5274         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5275         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5276
5277         fc_host_post_vendor_event(shost, fc_get_event_number(),
5278                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5279
5280         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5281                                                 FCP_LUN_RESET);
5282
5283         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5284                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5285                          "return x%x\n", tgt_id, lun_id, status);
5286
5287         /*
5288          * We have to clean up i/o as : they may be orphaned by the TMF;
5289          * or if the TMF failed, they may be in an indeterminate state.
5290          * So, continue on.
5291          * We will report success if all the i/o aborts successfully.
5292          */
5293         if (status == SUCCESS)
5294                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5295                                                 LPFC_CTX_LUN);
5296
5297         return status;
5298 }
5299
5300 /**
5301  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5302  * @cmnd: Pointer to scsi_cmnd data structure.
5303  *
5304  * This routine does a target reset by sending a TARGET_RESET task management
5305  * command.
5306  *
5307  * Return code :
5308  *  0x2003 - Error
5309  *  0x2002 - Success
5310  **/
5311 static int
5312 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5313 {
5314         struct Scsi_Host  *shost = cmnd->device->host;
5315         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5316         struct lpfc_rport_data *rdata;
5317         struct lpfc_nodelist *pnode;
5318         unsigned tgt_id = cmnd->device->id;
5319         uint64_t lun_id = cmnd->device->lun;
5320         struct lpfc_scsi_event_header scsi_event;
5321         int status;
5322
5323         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5324         if (!rdata) {
5325                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5326                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5327                 return FAILED;
5328         }
5329         pnode = rdata->pnode;
5330         status = fc_block_scsi_eh(cmnd);
5331         if (status != 0 && status != SUCCESS)
5332                 return status;
5333
5334         status = lpfc_chk_tgt_mapped(vport, cmnd);
5335         if (status == FAILED) {
5336                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5337                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5338                 if (pnode) {
5339                         spin_lock_irq(shost->host_lock);
5340                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5341                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5342                         spin_unlock_irq(shost->host_lock);
5343                 }
5344                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5345                                           LPFC_CTX_TGT);
5346                 return FAST_IO_FAIL;
5347         }
5348
5349         scsi_event.event_type = FC_REG_SCSI_EVENT;
5350         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5351         scsi_event.lun = 0;
5352         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5353         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5354
5355         fc_host_post_vendor_event(shost, fc_get_event_number(),
5356                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5357
5358         status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5359                                         FCP_TARGET_RESET);
5360
5361         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5362                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5363                          "return x%x\n", tgt_id, lun_id, status);
5364
5365         /*
5366          * We have to clean up i/o as : they may be orphaned by the TMF;
5367          * or if the TMF failed, they may be in an indeterminate state.
5368          * So, continue on.
5369          * We will report success if all the i/o aborts successfully.
5370          */
5371         if (status == SUCCESS)
5372                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5373                                           LPFC_CTX_TGT);
5374         return status;
5375 }
5376
5377 /**
5378  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5379  * @cmnd: Pointer to scsi_cmnd data structure.
5380  *
5381  * This routine does target reset to all targets on @cmnd->device->host.
5382  * This emulates Parallel SCSI Bus Reset Semantics.
5383  *
5384  * Return code :
5385  *  0x2003 - Error
5386  *  0x2002 - Success
5387  **/
5388 static int
5389 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5390 {
5391         struct Scsi_Host  *shost = cmnd->device->host;
5392         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5393         struct lpfc_nodelist *ndlp = NULL;
5394         struct lpfc_scsi_event_header scsi_event;
5395         int match;
5396         int ret = SUCCESS, status, i;
5397
5398         scsi_event.event_type = FC_REG_SCSI_EVENT;
5399         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5400         scsi_event.lun = 0;
5401         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5402         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5403
5404         fc_host_post_vendor_event(shost, fc_get_event_number(),
5405                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5406
5407         status = fc_block_scsi_eh(cmnd);
5408         if (status != 0 && status != SUCCESS)
5409                 return status;
5410
5411         /*
5412          * Since the driver manages a single bus device, reset all
5413          * targets known to the driver.  Should any target reset
5414          * fail, this routine returns failure to the midlayer.
5415          */
5416         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5417                 /* Search for mapped node by target ID */
5418                 match = 0;
5419                 spin_lock_irq(shost->host_lock);
5420                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5421                         if (!NLP_CHK_NODE_ACT(ndlp))
5422                                 continue;
5423                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5424                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5425                                 continue;
5426                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5427                             ndlp->nlp_sid == i &&
5428                             ndlp->rport &&
5429                             ndlp->nlp_type & NLP_FCP_TARGET) {
5430                                 match = 1;
5431                                 break;
5432                         }
5433                 }
5434                 spin_unlock_irq(shost->host_lock);
5435                 if (!match)
5436                         continue;
5437
5438                 status = lpfc_send_taskmgmt(vport, cmnd,
5439                                         i, 0, FCP_TARGET_RESET);
5440
5441                 if (status != SUCCESS) {
5442                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5443                                          "0700 Bus Reset on target %d failed\n",
5444                                          i);
5445                         ret = FAILED;
5446                 }
5447         }
5448         /*
5449          * We have to clean up i/o as : they may be orphaned by the TMFs
5450          * above; or if any of the TMFs failed, they may be in an
5451          * indeterminate state.
5452          * We will report success if all the i/o aborts successfully.
5453          */
5454
5455         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5456         if (status != SUCCESS)
5457                 ret = FAILED;
5458
5459         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5460                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5461         return ret;
5462 }
5463
5464 /**
5465  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5466  * @cmnd: Pointer to scsi_cmnd data structure.
5467  *
5468  * This routine does host reset to the adaptor port. It brings the HBA
5469  * offline, performs a board restart, and then brings the board back online.
5470  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5471  * reject all outstanding SCSI commands to the host and error returned
5472  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5473  * of error handling, it will only return error if resetting of the adapter
5474  * is not successful; in all other cases, will return success.
5475  *
5476  * Return code :
5477  *  0x2003 - Error
5478  *  0x2002 - Success
5479  **/
5480 static int
5481 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5482 {
5483         struct Scsi_Host *shost = cmnd->device->host;
5484         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5485         struct lpfc_hba *phba = vport->phba;
5486         int rc, ret = SUCCESS;
5487
5488         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5489                          "3172 SCSI layer issued Host Reset Data:\n");
5490
5491         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5492         lpfc_offline(phba);
5493         rc = lpfc_sli_brdrestart(phba);
5494         if (rc)
5495                 ret = FAILED;
5496         rc = lpfc_online(phba);
5497         if (rc)
5498                 ret = FAILED;
5499         lpfc_unblock_mgmt_io(phba);
5500
5501         if (ret == FAILED) {
5502                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5503                                  "3323 Failed host reset, bring it offline\n");
5504                 lpfc_sli4_offline_eratt(phba);
5505         }
5506         return ret;
5507 }
5508
5509 /**
5510  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5511  * @sdev: Pointer to scsi_device.
5512  *
5513  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5514  * globally available list of scsi buffers. This routine also makes sure scsi
5515  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5516  * of scsi buffer exists for the lifetime of the driver.
5517  *
5518  * Return codes:
5519  *   non-0 - Error
5520  *   0 - Success
5521  **/
5522 static int
5523 lpfc_slave_alloc(struct scsi_device *sdev)
5524 {
5525         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5526         struct lpfc_hba   *phba = vport->phba;
5527         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5528         uint32_t total = 0;
5529         uint32_t num_to_alloc = 0;
5530         int num_allocated = 0;
5531         uint32_t sdev_cnt;
5532         struct lpfc_device_data *device_data;
5533         unsigned long flags;
5534         struct lpfc_name target_wwpn;
5535
5536         if (!rport || fc_remote_port_chkready(rport))
5537                 return -ENXIO;
5538
5539         if (phba->cfg_fof) {
5540
5541                 /*
5542                  * Check to see if the device data structure for the lun
5543                  * exists.  If not, create one.
5544                  */
5545
5546                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5547                 spin_lock_irqsave(&phba->devicelock, flags);
5548                 device_data = __lpfc_get_device_data(phba,
5549                                                      &phba->luns,
5550                                                      &vport->fc_portname,
5551                                                      &target_wwpn,
5552                                                      sdev->lun);
5553                 if (!device_data) {
5554                         spin_unlock_irqrestore(&phba->devicelock, flags);
5555                         device_data = lpfc_create_device_data(phba,
5556                                                         &vport->fc_portname,
5557                                                         &target_wwpn,
5558                                                         sdev->lun,
5559                                                         phba->cfg_XLanePriority,
5560                                                         true);
5561                         if (!device_data)
5562                                 return -ENOMEM;
5563                         spin_lock_irqsave(&phba->devicelock, flags);
5564                         list_add_tail(&device_data->listentry, &phba->luns);
5565                 }
5566                 device_data->rport_data = rport->dd_data;
5567                 device_data->available = true;
5568                 spin_unlock_irqrestore(&phba->devicelock, flags);
5569                 sdev->hostdata = device_data;
5570         } else {
5571                 sdev->hostdata = rport->dd_data;
5572         }
5573         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5574
5575         /*
5576          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5577          * available list of scsi buffers.  Don't allocate more than the
5578          * HBA limit conveyed to the midlayer via the host structure.  The
5579          * formula accounts for the lun_queue_depth + error handlers + 1
5580          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5581          */
5582         total = phba->total_scsi_bufs;
5583         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5584
5585         /* If allocated buffers are enough do nothing */
5586         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5587                 return 0;
5588
5589         /* Allow some exchanges to be available always to complete discovery */
5590         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5591                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5592                                  "0704 At limitation of %d preallocated "
5593                                  "command buffers\n", total);
5594                 return 0;
5595         /* Allow some exchanges to be available always to complete discovery */
5596         } else if (total + num_to_alloc >
5597                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5598                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5599                                  "0705 Allocation request of %d "
5600                                  "command buffers will exceed max of %d.  "
5601                                  "Reducing allocation request to %d.\n",
5602                                  num_to_alloc, phba->cfg_hba_queue_depth,
5603                                  (phba->cfg_hba_queue_depth - total));
5604                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5605         }
5606         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5607         if (num_to_alloc != num_allocated) {
5608                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5609                                          "0708 Allocation request of %d "
5610                                          "command buffers did not succeed.  "
5611                                          "Allocated %d buffers.\n",
5612                                          num_to_alloc, num_allocated);
5613         }
5614         if (num_allocated > 0)
5615                 phba->total_scsi_bufs += num_allocated;
5616         return 0;
5617 }
5618
5619 /**
5620  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5621  * @sdev: Pointer to scsi_device.
5622  *
5623  * This routine configures following items
5624  *   - Tag command queuing support for @sdev if supported.
5625  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5626  *
5627  * Return codes:
5628  *   0 - Success
5629  **/
5630 static int
5631 lpfc_slave_configure(struct scsi_device *sdev)
5632 {
5633         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5634         struct lpfc_hba   *phba = vport->phba;
5635
5636         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5637
5638         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5639                 lpfc_sli_handle_fast_ring_event(phba,
5640                         &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5641                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5642                         lpfc_poll_rearm_timer(phba);
5643         }
5644
5645         return 0;
5646 }
5647
5648 /**
5649  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5650  * @sdev: Pointer to scsi_device.
5651  *
5652  * This routine sets @sdev hostatdata filed to null.
5653  **/
5654 static void
5655 lpfc_slave_destroy(struct scsi_device *sdev)
5656 {
5657         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5658         struct lpfc_hba   *phba = vport->phba;
5659         unsigned long flags;
5660         struct lpfc_device_data *device_data = sdev->hostdata;
5661
5662         atomic_dec(&phba->sdev_cnt);
5663         if ((phba->cfg_fof) && (device_data)) {
5664                 spin_lock_irqsave(&phba->devicelock, flags);
5665                 device_data->available = false;
5666                 if (!device_data->oas_enabled)
5667                         lpfc_delete_device_data(phba, device_data);
5668                 spin_unlock_irqrestore(&phba->devicelock, flags);
5669         }
5670         sdev->hostdata = NULL;
5671         return;
5672 }
5673
5674 /**
5675  * lpfc_create_device_data - creates and initializes device data structure for OAS
5676  * @pha: Pointer to host bus adapter structure.
5677  * @vport_wwpn: Pointer to vport's wwpn information
5678  * @target_wwpn: Pointer to target's wwpn information
5679  * @lun: Lun on target
5680  * @atomic_create: Flag to indicate if memory should be allocated using the
5681  *                GFP_ATOMIC flag or not.
5682  *
5683  * This routine creates a device data structure which will contain identifying
5684  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5685  * whether or not the corresponding lun is available by the system,
5686  * and pointer to the rport data.
5687  *
5688  * Return codes:
5689  *   NULL - Error
5690  *   Pointer to lpfc_device_data - Success
5691  **/
5692 struct lpfc_device_data*
5693 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5694                         struct lpfc_name *target_wwpn, uint64_t lun,
5695                         uint32_t pri, bool atomic_create)
5696 {
5697
5698         struct lpfc_device_data *lun_info;
5699         int memory_flags;
5700
5701         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5702             !(phba->cfg_fof))
5703                 return NULL;
5704
5705         /* Attempt to create the device data to contain lun info */
5706
5707         if (atomic_create)
5708                 memory_flags = GFP_ATOMIC;
5709         else
5710                 memory_flags = GFP_KERNEL;
5711         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5712         if (!lun_info)
5713                 return NULL;
5714         INIT_LIST_HEAD(&lun_info->listentry);
5715         lun_info->rport_data  = NULL;
5716         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5717                sizeof(struct lpfc_name));
5718         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5719                sizeof(struct lpfc_name));
5720         lun_info->device_id.lun = lun;
5721         lun_info->oas_enabled = false;
5722         lun_info->priority = pri;
5723         lun_info->available = false;
5724         return lun_info;
5725 }
5726
5727 /**
5728  * lpfc_delete_device_data - frees a device data structure for OAS
5729  * @pha: Pointer to host bus adapter structure.
5730  * @lun_info: Pointer to device data structure to free.
5731  *
5732  * This routine frees the previously allocated device data structure passed.
5733  *
5734  **/
5735 void
5736 lpfc_delete_device_data(struct lpfc_hba *phba,
5737                         struct lpfc_device_data *lun_info)
5738 {
5739
5740         if (unlikely(!phba) || !lun_info  ||
5741             !(phba->cfg_fof))
5742                 return;
5743
5744         if (!list_empty(&lun_info->listentry))
5745                 list_del(&lun_info->listentry);
5746         mempool_free(lun_info, phba->device_data_mem_pool);
5747         return;
5748 }
5749
5750 /**
5751  * __lpfc_get_device_data - returns the device data for the specified lun
5752  * @pha: Pointer to host bus adapter structure.
5753  * @list: Point to list to search.
5754  * @vport_wwpn: Pointer to vport's wwpn information
5755  * @target_wwpn: Pointer to target's wwpn information
5756  * @lun: Lun on target
5757  *
5758  * This routine searches the list passed for the specified lun's device data.
5759  * This function does not hold locks, it is the responsibility of the caller
5760  * to ensure the proper lock is held before calling the function.
5761  *
5762  * Return codes:
5763  *   NULL - Error
5764  *   Pointer to lpfc_device_data - Success
5765  **/
5766 struct lpfc_device_data*
5767 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5768                        struct lpfc_name *vport_wwpn,
5769                        struct lpfc_name *target_wwpn, uint64_t lun)
5770 {
5771
5772         struct lpfc_device_data *lun_info;
5773
5774         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5775             !phba->cfg_fof)
5776                 return NULL;
5777
5778         /* Check to see if the lun is already enabled for OAS. */
5779
5780         list_for_each_entry(lun_info, list, listentry) {
5781                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5782                             sizeof(struct lpfc_name)) == 0) &&
5783                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5784                             sizeof(struct lpfc_name)) == 0) &&
5785                     (lun_info->device_id.lun == lun))
5786                         return lun_info;
5787         }
5788
5789         return NULL;
5790 }
5791
5792 /**
5793  * lpfc_find_next_oas_lun - searches for the next oas lun
5794  * @pha: Pointer to host bus adapter structure.
5795  * @vport_wwpn: Pointer to vport's wwpn information
5796  * @target_wwpn: Pointer to target's wwpn information
5797  * @starting_lun: Pointer to the lun to start searching for
5798  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5799  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5800  * @found_lun: Pointer to the found lun.
5801  * @found_lun_status: Pointer to status of the found lun.
5802  *
5803  * This routine searches the luns list for the specified lun
5804  * or the first lun for the vport/target.  If the vport wwpn contains
5805  * a zero value then a specific vport is not specified. In this case
5806  * any vport which contains the lun will be considered a match.  If the
5807  * target wwpn contains a zero value then a specific target is not specified.
5808  * In this case any target which contains the lun will be considered a
5809  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5810  * are returned.  The function will also return the next lun if available.
5811  * If the next lun is not found, starting_lun parameter will be set to
5812  * NO_MORE_OAS_LUN.
5813  *
5814  * Return codes:
5815  *   non-0 - Error
5816  *   0 - Success
5817  **/
5818 bool
5819 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5820                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5821                        struct lpfc_name *found_vport_wwpn,
5822                        struct lpfc_name *found_target_wwpn,
5823                        uint64_t *found_lun,
5824                        uint32_t *found_lun_status,
5825                        uint32_t *found_lun_pri)
5826 {
5827
5828         unsigned long flags;
5829         struct lpfc_device_data *lun_info;
5830         struct lpfc_device_id *device_id;
5831         uint64_t lun;
5832         bool found = false;
5833
5834         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5835             !starting_lun || !found_vport_wwpn ||
5836             !found_target_wwpn || !found_lun || !found_lun_status ||
5837             (*starting_lun == NO_MORE_OAS_LUN) ||
5838             !phba->cfg_fof)
5839                 return false;
5840
5841         lun = *starting_lun;
5842         *found_lun = NO_MORE_OAS_LUN;
5843         *starting_lun = NO_MORE_OAS_LUN;
5844
5845         /* Search for lun or the lun closet in value */
5846
5847         spin_lock_irqsave(&phba->devicelock, flags);
5848         list_for_each_entry(lun_info, &phba->luns, listentry) {
5849                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5850                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5851                             sizeof(struct lpfc_name)) == 0)) &&
5852                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5853                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5854                             sizeof(struct lpfc_name)) == 0)) &&
5855                     (lun_info->oas_enabled)) {
5856                         device_id = &lun_info->device_id;
5857                         if ((!found) &&
5858                             ((lun == FIND_FIRST_OAS_LUN) ||
5859                              (device_id->lun == lun))) {
5860                                 *found_lun = device_id->lun;
5861                                 memcpy(found_vport_wwpn,
5862                                        &device_id->vport_wwpn,
5863                                        sizeof(struct lpfc_name));
5864                                 memcpy(found_target_wwpn,
5865                                        &device_id->target_wwpn,
5866                                        sizeof(struct lpfc_name));
5867                                 if (lun_info->available)
5868                                         *found_lun_status =
5869                                                 OAS_LUN_STATUS_EXISTS;
5870                                 else
5871                                         *found_lun_status = 0;
5872                                 *found_lun_pri = lun_info->priority;
5873                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5874                                         memset(vport_wwpn, 0x0,
5875                                                sizeof(struct lpfc_name));
5876                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5877                                         memset(target_wwpn, 0x0,
5878                                                sizeof(struct lpfc_name));
5879                                 found = true;
5880                         } else if (found) {
5881                                 *starting_lun = device_id->lun;
5882                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5883                                        sizeof(struct lpfc_name));
5884                                 memcpy(target_wwpn, &device_id->target_wwpn,
5885                                        sizeof(struct lpfc_name));
5886                                 break;
5887                         }
5888                 }
5889         }
5890         spin_unlock_irqrestore(&phba->devicelock, flags);
5891         return found;
5892 }
5893
5894 /**
5895  * lpfc_enable_oas_lun - enables a lun for OAS operations
5896  * @pha: Pointer to host bus adapter structure.
5897  * @vport_wwpn: Pointer to vport's wwpn information
5898  * @target_wwpn: Pointer to target's wwpn information
5899  * @lun: Lun
5900  *
5901  * This routine enables a lun for oas operations.  The routines does so by
5902  * doing the following :
5903  *
5904  *   1) Checks to see if the device data for the lun has been created.
5905  *   2) If found, sets the OAS enabled flag if not set and returns.
5906  *   3) Otherwise, creates a device data structure.
5907  *   4) If successfully created, indicates the device data is for an OAS lun,
5908  *   indicates the lun is not available and add to the list of luns.
5909  *
5910  * Return codes:
5911  *   false - Error
5912  *   true - Success
5913  **/
5914 bool
5915 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5916                     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5917 {
5918
5919         struct lpfc_device_data *lun_info;
5920         unsigned long flags;
5921
5922         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5923             !phba->cfg_fof)
5924                 return false;
5925
5926         spin_lock_irqsave(&phba->devicelock, flags);
5927
5928         /* Check to see if the device data for the lun has been created */
5929         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5930                                           target_wwpn, lun);
5931         if (lun_info) {
5932                 if (!lun_info->oas_enabled)
5933                         lun_info->oas_enabled = true;
5934                 lun_info->priority = pri;
5935                 spin_unlock_irqrestore(&phba->devicelock, flags);
5936                 return true;
5937         }
5938
5939         /* Create an lun info structure and add to list of luns */
5940         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5941                                            pri, false);
5942         if (lun_info) {
5943                 lun_info->oas_enabled = true;
5944                 lun_info->priority = pri;
5945                 lun_info->available = false;
5946                 list_add_tail(&lun_info->listentry, &phba->luns);
5947                 spin_unlock_irqrestore(&phba->devicelock, flags);
5948                 return true;
5949         }
5950         spin_unlock_irqrestore(&phba->devicelock, flags);
5951         return false;
5952 }
5953
5954 /**
5955  * lpfc_disable_oas_lun - disables a lun for OAS operations
5956  * @pha: Pointer to host bus adapter structure.
5957  * @vport_wwpn: Pointer to vport's wwpn information
5958  * @target_wwpn: Pointer to target's wwpn information
5959  * @lun: Lun
5960  *
5961  * This routine disables a lun for oas operations.  The routines does so by
5962  * doing the following :
5963  *
5964  *   1) Checks to see if the device data for the lun is created.
5965  *   2) If present, clears the flag indicating this lun is for OAS.
5966  *   3) If the lun is not available by the system, the device data is
5967  *   freed.
5968  *
5969  * Return codes:
5970  *   false - Error
5971  *   true - Success
5972  **/
5973 bool
5974 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5975                      struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5976 {
5977
5978         struct lpfc_device_data *lun_info;
5979         unsigned long flags;
5980
5981         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5982             !phba->cfg_fof)
5983                 return false;
5984
5985         spin_lock_irqsave(&phba->devicelock, flags);
5986
5987         /* Check to see if the lun is available. */
5988         lun_info = __lpfc_get_device_data(phba,
5989                                           &phba->luns, vport_wwpn,
5990                                           target_wwpn, lun);
5991         if (lun_info) {
5992                 lun_info->oas_enabled = false;
5993                 lun_info->priority = pri;
5994                 if (!lun_info->available)
5995                         lpfc_delete_device_data(phba, lun_info);
5996                 spin_unlock_irqrestore(&phba->devicelock, flags);
5997                 return true;
5998         }
5999
6000         spin_unlock_irqrestore(&phba->devicelock, flags);
6001         return false;
6002 }
6003
6004 static int
6005 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
6006 {
6007         return SCSI_MLQUEUE_HOST_BUSY;
6008 }
6009
6010 static int
6011 lpfc_no_handler(struct scsi_cmnd *cmnd)
6012 {
6013         return FAILED;
6014 }
6015
6016 static int
6017 lpfc_no_slave(struct scsi_device *sdev)
6018 {
6019         return -ENODEV;
6020 }
6021
6022 struct scsi_host_template lpfc_template_nvme = {
6023         .module                 = THIS_MODULE,
6024         .name                   = LPFC_DRIVER_NAME,
6025         .proc_name              = LPFC_DRIVER_NAME,
6026         .info                   = lpfc_info,
6027         .queuecommand           = lpfc_no_command,
6028         .eh_abort_handler       = lpfc_no_handler,
6029         .eh_device_reset_handler = lpfc_no_handler,
6030         .eh_target_reset_handler = lpfc_no_handler,
6031         .eh_bus_reset_handler   = lpfc_no_handler,
6032         .eh_host_reset_handler  = lpfc_no_handler,
6033         .slave_alloc            = lpfc_no_slave,
6034         .slave_configure        = lpfc_no_slave,
6035         .scan_finished          = lpfc_scan_finished,
6036         .this_id                = -1,
6037         .sg_tablesize           = 1,
6038         .cmd_per_lun            = 1,
6039         .use_clustering         = ENABLE_CLUSTERING,
6040         .shost_attrs            = lpfc_hba_attrs,
6041         .max_sectors            = 0xFFFF,
6042         .vendor_id              = LPFC_NL_VENDOR_ID,
6043         .track_queue_depth      = 0,
6044 };
6045
6046 struct scsi_host_template lpfc_template_no_hr = {
6047         .module                 = THIS_MODULE,
6048         .name                   = LPFC_DRIVER_NAME,
6049         .proc_name              = LPFC_DRIVER_NAME,
6050         .info                   = lpfc_info,
6051         .queuecommand           = lpfc_queuecommand,
6052         .eh_timed_out           = fc_eh_timed_out,
6053         .eh_abort_handler       = lpfc_abort_handler,
6054         .eh_device_reset_handler = lpfc_device_reset_handler,
6055         .eh_target_reset_handler = lpfc_target_reset_handler,
6056         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6057         .slave_alloc            = lpfc_slave_alloc,
6058         .slave_configure        = lpfc_slave_configure,
6059         .slave_destroy          = lpfc_slave_destroy,
6060         .scan_finished          = lpfc_scan_finished,
6061         .this_id                = -1,
6062         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6063         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6064         .use_clustering         = ENABLE_CLUSTERING,
6065         .shost_attrs            = lpfc_hba_attrs,
6066         .max_sectors            = 0xFFFF,
6067         .vendor_id              = LPFC_NL_VENDOR_ID,
6068         .change_queue_depth     = scsi_change_queue_depth,
6069         .track_queue_depth      = 1,
6070 };
6071
6072 struct scsi_host_template lpfc_template = {
6073         .module                 = THIS_MODULE,
6074         .name                   = LPFC_DRIVER_NAME,
6075         .proc_name              = LPFC_DRIVER_NAME,
6076         .info                   = lpfc_info,
6077         .queuecommand           = lpfc_queuecommand,
6078         .eh_timed_out           = fc_eh_timed_out,
6079         .eh_abort_handler       = lpfc_abort_handler,
6080         .eh_device_reset_handler = lpfc_device_reset_handler,
6081         .eh_target_reset_handler = lpfc_target_reset_handler,
6082         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
6083         .eh_host_reset_handler  = lpfc_host_reset_handler,
6084         .slave_alloc            = lpfc_slave_alloc,
6085         .slave_configure        = lpfc_slave_configure,
6086         .slave_destroy          = lpfc_slave_destroy,
6087         .scan_finished          = lpfc_scan_finished,
6088         .this_id                = -1,
6089         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6090         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6091         .use_clustering         = ENABLE_CLUSTERING,
6092         .shost_attrs            = lpfc_hba_attrs,
6093         .max_sectors            = 0xFFFF,
6094         .vendor_id              = LPFC_NL_VENDOR_ID,
6095         .change_queue_depth     = scsi_change_queue_depth,
6096         .track_queue_depth      = 1,
6097 };
6098
6099 struct scsi_host_template lpfc_vport_template = {
6100         .module                 = THIS_MODULE,
6101         .name                   = LPFC_DRIVER_NAME,
6102         .proc_name              = LPFC_DRIVER_NAME,
6103         .info                   = lpfc_info,
6104         .queuecommand           = lpfc_queuecommand,
6105         .eh_timed_out           = fc_eh_timed_out,
6106         .eh_abort_handler       = lpfc_abort_handler,
6107         .eh_device_reset_handler = lpfc_device_reset_handler,
6108         .eh_target_reset_handler = lpfc_target_reset_handler,
6109         .slave_alloc            = lpfc_slave_alloc,
6110         .slave_configure        = lpfc_slave_configure,
6111         .slave_destroy          = lpfc_slave_destroy,
6112         .scan_finished          = lpfc_scan_finished,
6113         .this_id                = -1,
6114         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
6115         .cmd_per_lun            = LPFC_CMD_PER_LUN,
6116         .use_clustering         = ENABLE_CLUSTERING,
6117         .shost_attrs            = lpfc_vport_attrs,
6118         .max_sectors            = 0xFFFF,
6119         .change_queue_depth     = scsi_change_queue_depth,
6120         .track_queue_depth      = 1,
6121 };