kernel/drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2015 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21 #include <linux/pci.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/export.h>
  25 #include <linux/delay.h>
  26 #include <asm/unaligned.h>
  27 #include <linux/crc-t10dif.h>
  28 #include <net/checksum.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_eh.h>
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/scsi_transport_fc.h>
  36
  37 #include "lpfc_version.h"
  38 #include "lpfc_hw4.h"
  39 #include "lpfc_hw.h"
  40 #include "lpfc_sli.h"
  41 #include "lpfc_sli4.h"
  42 #include "lpfc_nl.h"
  43 #include "lpfc_disc.h"
  44 #include "lpfc.h"
  45 #include "lpfc_scsi.h"
  46 #include "lpfc_logmsg.h"
  47 #include "lpfc_crtn.h"
  48 #include "lpfc_vport.h"
  49
  50 #define LPFC_RESET_WAIT  2
  51 #define LPFC_ABORT_WAIT  2
  52
  53 int _dump_buf_done = 1;
  54
  55 static char *dif_op_str[] = {
  56         "PROT_NORMAL",
  57         "PROT_READ_INSERT",
  58         "PROT_WRITE_STRIP",
  59         "PROT_READ_STRIP",
  60         "PROT_WRITE_INSERT",
  61         "PROT_READ_PASS",
  62         "PROT_WRITE_PASS",
  63 };
  64
  65 struct scsi_dif_tuple {
  66         __be16 guard_tag;       /* Checksum */
  67         __be16 app_tag;         /* Opaque storage */
  68         __be32 ref_tag;         /* Target LBA or indirect LBA */
  69 };
  70
  71 static struct lpfc_rport_data *
  72 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  73 {
  74         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  75
  76         if (vport->phba->cfg_fof)
  77                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  78         else
  79                 return (struct lpfc_rport_data *)sdev->hostdata;
  80 }
  81
  82 static void
  83 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  84 static void
  85 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  86 static int
  87 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  88
  89 static void
  90 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  91 {
  92         void *src, *dst;
  93         struct scatterlist *sgde = scsi_sglist(cmnd);
  94
  95         if (!_dump_buf_data) {
  96                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  97                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  98                                 __func__);
  99                 return;
 100         }
 101
 102
 103         if (!sgde) {
 104                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 105                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
 106                 return;
 107         }
 108
 109         dst = (void *) _dump_buf_data;
 110         while (sgde) {
 111                 src = sg_virt(sgde);
 112                 memcpy(dst, src, sgde->length);
 113                 dst += sgde->length;
 114                 sgde = sg_next(sgde);
 115         }
 116 }
 117
 118 static void
 119 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
 120 {
 121         void *src, *dst;
 122         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 123
 124         if (!_dump_buf_dif) {
 125                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 126                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 127                                 __func__);
 128                 return;
 129         }
 130
 131         if (!sgde) {
 132                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 133                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 134                 return;
 135         }
 136
 137         dst = _dump_buf_dif;
 138         while (sgde) {
 139                 src = sg_virt(sgde);
 140                 memcpy(dst, src, sgde->length);
 141                 dst += sgde->length;
 142                 sgde = sg_next(sgde);
 143         }
 144 }
 145
 146 static inline unsigned
 147 lpfc_cmd_blksize(struct scsi_cmnd *sc)
 148 {
 149         return sc->device->sector_size;
 150 }
 151
 152 #define LPFC_CHECK_PROTECT_GUARD        1
 153 #define LPFC_CHECK_PROTECT_REF          2
 154 static inline unsigned
 155 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 156 {
 157         return 1;
 158 }
 159
 160 static inline unsigned
 161 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 162 {
 163         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 164                 return 0;
 165         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 166                 return 1;
 167         return 0;
 168 }
 169
 170 /**
 171  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 172  * @phba: Pointer to HBA object.
 173  * @lpfc_cmd: lpfc scsi command object pointer.
 174  *
 175  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 176  * set the last bit in the response sge entry.
 177  **/
 178 static void
 179 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 180                                 struct lpfc_scsi_buf *lpfc_cmd)
 181 {
 182         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 183         if (sgl) {
 184                 sgl += 1;
 185                 sgl->word2 = le32_to_cpu(sgl->word2);
 186                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 187                 sgl->word2 = cpu_to_le32(sgl->word2);
 188         }
 189 }
 190
 191 /**
 192  * lpfc_update_stats - Update statistical data for the command completion
 193  * @phba: Pointer to HBA object.
 194  * @lpfc_cmd: lpfc scsi command object pointer.
 195  *
 196  * This function is called when there is a command completion and this
 197  * function updates the statistical data for the command completion.
 198  **/
 199 static void
 200 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 201 {
 202         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 203         struct lpfc_nodelist *pnode = rdata->pnode;
 204         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 205         unsigned long flags;
 206         struct Scsi_Host  *shost = cmd->device->host;
 207         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 208         unsigned long latency;
 209         int i;
 210
 211         if (cmd->result)
 212                 return;
 213
 214         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 215
 216         spin_lock_irqsave(shost->host_lock, flags);
 217         if (!vport->stat_data_enabled ||
 218                 vport->stat_data_blocked ||
 219                 !pnode ||
 220                 !pnode->lat_data ||
 221                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 222                 spin_unlock_irqrestore(shost->host_lock, flags);
 223                 return;
 224         }
 225
 226         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 227                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 228                         phba->bucket_step;
 229                 /* check array subscript bounds */
 230                 if (i < 0)
 231                         i = 0;
 232                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 233                         i = LPFC_MAX_BUCKET_COUNT - 1;
 234         } else {
 235                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 236                         if (latency <= (phba->bucket_base +
 237                                 ((1<<i)*phba->bucket_step)))
 238                                 break;
 239         }
 240
 241         pnode->lat_data[i].cmd_count++;
 242         spin_unlock_irqrestore(shost->host_lock, flags);
 243 }
 244
 245 /**
 246  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 247  * @phba: The Hba for which this call is being executed.
 248  *
 249  * This routine is called when there is resource error in driver or firmware.
 250  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 251  * posts at most 1 event each second. This routine wakes up worker thread of
 252  * @phba to process WORKER_RAM_DOWN_EVENT event.
 253  *
 254  * This routine should be called with no lock held.
 255  **/
 256 void
 257 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 258 {
 259         unsigned long flags;
 260         uint32_t evt_posted;
 261         unsigned long expires;
 262
 263         spin_lock_irqsave(&phba->hbalock, flags);
 264         atomic_inc(&phba->num_rsrc_err);
 265         phba->last_rsrc_error_time = jiffies;
 266
 267         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 268         if (time_after(expires, jiffies)) {
 269                 spin_unlock_irqrestore(&phba->hbalock, flags);
 270                 return;
 271         }
 272
 273         phba->last_ramp_down_time = jiffies;
 274
 275         spin_unlock_irqrestore(&phba->hbalock, flags);
 276
 277         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 278         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 279         if (!evt_posted)
 280                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 281         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 282
 283         if (!evt_posted)
 284                 lpfc_worker_wake_up(phba);
 285         return;
 286 }
 287
 288 /**
 289  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 290  * @phba: The Hba for which this call is being executed.
 291  *
 292  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 293  * thread.This routine reduces queue depth for all scsi device on each vport
 294  * associated with @phba.
 295  **/
 296 void
 297 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 298 {
 299         struct lpfc_vport **vports;
 300         struct Scsi_Host  *shost;
 301         struct scsi_device *sdev;
 302         unsigned long new_queue_depth;
 303         unsigned long num_rsrc_err, num_cmd_success;
 304         int i;
 305
 306         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 307         num_cmd_success = atomic_read(&phba->num_cmd_success);
 308
 309         /*
 310          * The error and success command counters are global per
 311          * driver instance.  If another handler has already
 312          * operated on this error event, just exit.
 313          */
 314         if (num_rsrc_err == 0)
 315                 return;
 316
 317         vports = lpfc_create_vport_work_array(phba);
 318         if (vports != NULL)
 319                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 320                         shost = lpfc_shost_from_vport(vports[i]);
 321                         shost_for_each_device(sdev, shost) {
 322                                 new_queue_depth =
 323                                         sdev->queue_depth * num_rsrc_err /
 324                                         (num_rsrc_err + num_cmd_success);
 325                                 if (!new_queue_depth)
 326                                         new_queue_depth = sdev->queue_depth - 1;
 327                                 else
 328                                         new_queue_depth = sdev->queue_depth -
 329                                                                 new_queue_depth;
 330                                 scsi_change_queue_depth(sdev, new_queue_depth);
 331                         }
 332                 }
 333         lpfc_destroy_vport_work_array(phba, vports);
 334         atomic_set(&phba->num_rsrc_err, 0);
 335         atomic_set(&phba->num_cmd_success, 0);
 336 }
 337
 338 /**
 339  * lpfc_scsi_dev_block - set all scsi hosts to block state
 340  * @phba: Pointer to HBA context object.
 341  *
 342  * This function walks vport list and set each SCSI host to block state
 343  * by invoking fc_remote_port_delete() routine. This function is invoked
 344  * with EEH when device's PCI slot has been permanently disabled.
 345  **/
 346 void
 347 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 348 {
 349         struct lpfc_vport **vports;
 350         struct Scsi_Host  *shost;
 351         struct scsi_device *sdev;
 352         struct fc_rport *rport;
 353         int i;
 354
 355         vports = lpfc_create_vport_work_array(phba);
 356         if (vports != NULL)
 357                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 358                         shost = lpfc_shost_from_vport(vports[i]);
 359                         shost_for_each_device(sdev, shost) {
 360                                 rport = starget_to_rport(scsi_target(sdev));
 361                                 fc_remote_port_delete(rport);
 362                         }
 363                 }
 364         lpfc_destroy_vport_work_array(phba, vports);
 365 }
 366
 367 /**
 368  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 369  * @vport: The virtual port for which this call being executed.
 370  * @num_to_allocate: The requested number of buffers to allocate.
 371  *
 372  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 373  * the scsi buffer contains all the necessary information needed to initiate
 374  * a SCSI I/O. The non-DMAable buffer region contains information to build
 375  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 376  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 377  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 378  *
 379  * Return codes:
 380  *   int - number of scsi buffers that were allocated.
 381  *   0 = failure, less than num_to_alloc is a partial failure.
 382  **/
 383 static int
 384 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 385 {
 386         struct lpfc_hba *phba = vport->phba;
 387         struct lpfc_scsi_buf *psb;
 388         struct ulp_bde64 *bpl;
 389         IOCB_t *iocb;
 390         dma_addr_t pdma_phys_fcp_cmd;
 391         dma_addr_t pdma_phys_fcp_rsp;
 392         dma_addr_t pdma_phys_bpl;
 393         uint16_t iotag;
 394         int bcnt, bpl_size;
 395
 396         bpl_size = phba->cfg_sg_dma_buf_size -
 397                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 398
 399         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 400                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 401                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 402                          (int)sizeof(struct fcp_cmnd),
 403                          (int)sizeof(struct fcp_rsp), bpl_size);
 404
 405         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 406                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 407                 if (!psb)
 408                         break;
 409
 410                 /*
 411                  * Get memory from the pci pool to map the virt space to pci
 412                  * bus space for an I/O.  The DMA buffer includes space for the
 413                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 414                  * necessary to support the sg_tablesize.
 415                  */
 416                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 417                                         GFP_KERNEL, &psb->dma_handle);
 418                 if (!psb->data) {
 419                         kfree(psb);
 420                         break;
 421                 }
 422
 423                 /* Initialize virtual ptrs to dma_buf region. */
 424                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 425
 426                 /* Allocate iotag for psb->cur_iocbq. */
 427                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 428                 if (iotag == 0) {
 429                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 430                                         psb->data, psb->dma_handle);
 431                         kfree(psb);
 432                         break;
 433                 }
 434                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 435
 436                 psb->fcp_cmnd = psb->data;
 437                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 438                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 439                         sizeof(struct fcp_rsp);
 440
 441                 /* Initialize local short-hand pointers. */
 442                 bpl = psb->fcp_bpl;
 443                 pdma_phys_fcp_cmd = psb->dma_handle;
 444                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 445                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 446                         sizeof(struct fcp_rsp);
 447
 448                 /*
 449                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 450                  * are sg list bdes.  Initialize the first two and leave the
 451                  * rest for queuecommand.
 452                  */
 453                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 454                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 455                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 456                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 457                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 458
 459                 /* Setup the physical region for the FCP RSP */
 460                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 461                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 462                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 463                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 464                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 465
 466                 /*
 467                  * Since the IOCB for the FCP I/O is built into this
 468                  * lpfc_scsi_buf, initialize it with all known data now.
 469                  */
 470                 iocb = &psb->cur_iocbq.iocb;
 471                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 472                 if ((phba->sli_rev == 3) &&
 473                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 474                         /* fill in immediate fcp command BDE */
 475                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 476                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 477                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 478                                         unsli3.fcp_ext.icd);
 479                         iocb->un.fcpi64.bdl.addrHigh = 0;
 480                         iocb->ulpBdeCount = 0;
 481                         iocb->ulpLe = 0;
 482                         /* fill in response BDE */
 483                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 484                                                         BUFF_TYPE_BDE_64;
 485                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 486                                 sizeof(struct fcp_rsp);
 487                         iocb->unsli3.fcp_ext.rbde.addrLow =
 488                                 putPaddrLow(pdma_phys_fcp_rsp);
 489                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 490                                 putPaddrHigh(pdma_phys_fcp_rsp);
 491                 } else {
 492                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 493                         iocb->un.fcpi64.bdl.bdeSize =
 494                                         (2 * sizeof(struct ulp_bde64));
 495                         iocb->un.fcpi64.bdl.addrLow =
 496                                         putPaddrLow(pdma_phys_bpl);
 497                         iocb->un.fcpi64.bdl.addrHigh =
 498                                         putPaddrHigh(pdma_phys_bpl);
 499                         iocb->ulpBdeCount = 1;
 500                         iocb->ulpLe = 1;
 501                 }
 502                 iocb->ulpClass = CLASS3;
 503                 psb->status = IOSTAT_SUCCESS;
 504                 /* Put it back into the SCSI buffer list */
 505                 psb->cur_iocbq.context1  = psb;
 506                 lpfc_release_scsi_buf_s3(phba, psb);
 507
 508         }
 509
 510         return bcnt;
 511 }
 512
 513 /**
 514  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 515  * @vport: pointer to lpfc vport data structure.
 516  *
 517  * This routine is invoked by the vport cleanup for deletions and the cleanup
 518  * for an ndlp on removal.
 519  **/
 520 void
 521 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 522 {
 523         struct lpfc_hba *phba = vport->phba;
 524         struct lpfc_scsi_buf *psb, *next_psb;
 525         unsigned long iflag = 0;
 526
 527         spin_lock_irqsave(&phba->hbalock, iflag);
 528         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 529         list_for_each_entry_safe(psb, next_psb,
 530                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 531                 if (psb->rdata && psb->rdata->pnode
 532                         && psb->rdata->pnode->vport == vport)
 533                         psb->rdata = NULL;
 534         }
 535         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 536         spin_unlock_irqrestore(&phba->hbalock, iflag);
 537 }
 538
 539 /**
 540  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 541  * @phba: pointer to lpfc hba data structure.
 542  * @axri: pointer to the fcp xri abort wcqe structure.
 543  *
 544  * This routine is invoked by the worker thread to process a SLI4 fast-path
 545  * FCP aborted xri.
 546  **/
 547 void
 548 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 549                           struct sli4_wcqe_xri_aborted *axri)
 550 {
 551         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 552         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 553         struct lpfc_scsi_buf *psb, *next_psb;
 554         unsigned long iflag = 0;
 555         struct lpfc_iocbq *iocbq;
 556         int i;
 557         struct lpfc_nodelist *ndlp;
 558         int rrq_empty = 0;
 559         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 560
 561         spin_lock_irqsave(&phba->hbalock, iflag);
 562         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 563         list_for_each_entry_safe(psb, next_psb,
 564                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 565                 if (psb->cur_iocbq.sli4_xritag == xri) {
 566                         list_del(&psb->list);
 567                         psb->exch_busy = 0;
 568                         psb->status = IOSTAT_SUCCESS;
 569                         spin_unlock(
 570                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 571                         if (psb->rdata && psb->rdata->pnode)
 572                                 ndlp = psb->rdata->pnode;
 573                         else
 574                                 ndlp = NULL;
 575
 576                         rrq_empty = list_empty(&phba->active_rrq_list);
 577                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 578                         if (ndlp) {
 579                                 lpfc_set_rrq_active(phba, ndlp,
 580                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 581                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 582                         }
 583                         lpfc_release_scsi_buf_s4(phba, psb);
 584                         if (rrq_empty)
 585                                 lpfc_worker_wake_up(phba);
 586                         return;
 587                 }
 588         }
 589         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 590         for (i = 1; i <= phba->sli.last_iotag; i++) {
 591                 iocbq = phba->sli.iocbq_lookup[i];
 592
 593                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 594                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 595                         continue;
 596                 if (iocbq->sli4_xritag != xri)
 597                         continue;
 598                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 599                 psb->exch_busy = 0;
 600                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 601                 if (!list_empty(&pring->txq))
 602                         lpfc_worker_wake_up(phba);
 603                 return;
 604
 605         }
 606         spin_unlock_irqrestore(&phba->hbalock, iflag);
 607 }
 608
 609 /**
 610  * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
 611  * @phba: pointer to lpfc hba data structure.
 612  * @post_sblist: pointer to the scsi buffer list.
 613  *
 614  * This routine walks a list of scsi buffers that was passed in. It attempts
 615  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 616  * uses the non-embedded SGL block post mailbox commands to post to the port.
 617  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 618  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 619  * must be local list, thus no lock is needed when manipulate the list.
 620  *
 621  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 622  **/
 623 static int
 624 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 625                              struct list_head *post_sblist, int sb_count)
 626 {
 627         struct lpfc_scsi_buf *psb, *psb_next;
 628         int status, sgl_size;
 629         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 630         dma_addr_t pdma_phys_bpl1;
 631         int last_xritag = NO_XRI;
 632         LIST_HEAD(prep_sblist);
 633         LIST_HEAD(blck_sblist);
 634         LIST_HEAD(scsi_sblist);
 635
 636         /* sanity check */
 637         if (sb_count <= 0)
 638                 return -EINVAL;
 639
 640         sgl_size = phba->cfg_sg_dma_buf_size -
 641                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 642
 643         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 644                 list_del_init(&psb->list);
 645                 block_cnt++;
 646                 if ((last_xritag != NO_XRI) &&
 647                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 648                         /* a hole in xri block, form a sgl posting block */
 649                         list_splice_init(&prep_sblist, &blck_sblist);
 650                         post_cnt = block_cnt - 1;
 651                         /* prepare list for next posting block */
 652                         list_add_tail(&psb->list, &prep_sblist);
 653                         block_cnt = 1;
 654                 } else {
 655                         /* prepare list for next posting block */
 656                         list_add_tail(&psb->list, &prep_sblist);
 657                         /* enough sgls for non-embed sgl mbox command */
 658                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 659                                 list_splice_init(&prep_sblist, &blck_sblist);
 660                                 post_cnt = block_cnt;
 661                                 block_cnt = 0;
 662                         }
 663                 }
 664                 num_posting++;
 665                 last_xritag = psb->cur_iocbq.sli4_xritag;
 666
 667                 /* end of repost sgl list condition for SCSI buffers */
 668                 if (num_posting == sb_count) {
 669                         if (post_cnt == 0) {
 670                                 /* last sgl posting block */
 671                                 list_splice_init(&prep_sblist, &blck_sblist);
 672                                 post_cnt = block_cnt;
 673                         } else if (block_cnt == 1) {
 674                                 /* last single sgl with non-contiguous xri */
 675                                 if (sgl_size > SGL_PAGE_SIZE)
 676                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 677                                                                 SGL_PAGE_SIZE;
 678                                 else
 679                                         pdma_phys_bpl1 = 0;
 680                                 status = lpfc_sli4_post_sgl(phba,
 681                                                 psb->dma_phys_bpl,
 682                                                 pdma_phys_bpl1,
 683                                                 psb->cur_iocbq.sli4_xritag);
 684                                 if (status) {
 685                                         /* failure, put on abort scsi list */
 686                                         psb->exch_busy = 1;
 687                                 } else {
 688                                         /* success, put on SCSI buffer list */
 689                                         psb->exch_busy = 0;
 690                                         psb->status = IOSTAT_SUCCESS;
 691                                         num_posted++;
 692                                 }
 693                                 /* success, put on SCSI buffer sgl list */
 694                                 list_add_tail(&psb->list, &scsi_sblist);
 695                         }
 696                 }
 697
 698                 /* continue until a nembed page worth of sgls */
 699                 if (post_cnt == 0)
 700                         continue;
 701
 702                 /* post block of SCSI buffer list sgls */
 703                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 704                                                        post_cnt);
 705
 706                 /* don't reset xirtag due to hole in xri block */
 707                 if (block_cnt == 0)
 708                         last_xritag = NO_XRI;
 709
 710                 /* reset SCSI buffer post count for next round of posting */
 711                 post_cnt = 0;
 712
 713                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 714                 while (!list_empty(&blck_sblist)) {
 715                         list_remove_head(&blck_sblist, psb,
 716                                          struct lpfc_scsi_buf, list);
 717                         if (status) {
 718                                 /* failure, put on abort scsi list */
 719                                 psb->exch_busy = 1;
 720                         } else {
 721                                 /* success, put on SCSI buffer list */
 722                                 psb->exch_busy = 0;
 723                                 psb->status = IOSTAT_SUCCESS;
 724                                 num_posted++;
 725                         }
 726                         list_add_tail(&psb->list, &scsi_sblist);
 727                 }
 728         }
 729         /* Push SCSI buffers with sgl posted to the availble list */
 730         while (!list_empty(&scsi_sblist)) {
 731                 list_remove_head(&scsi_sblist, psb,
 732                                  struct lpfc_scsi_buf, list);
 733                 lpfc_release_scsi_buf_s4(phba, psb);
 734         }
 735         return num_posted;
 736 }
 737
 738 /**
 739  * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 740  * @phba: pointer to lpfc hba data structure.
 741  *
 742  * This routine walks the list of scsi buffers that have been allocated and
 743  * repost them to the port by using SGL block post. This is needed after a
 744  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 745  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 746  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 747  *
 748  * Returns: 0 = success, non-zero failure.
 749  **/
 750 int
 751 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 752 {
 753         LIST_HEAD(post_sblist);
 754         int num_posted, rc = 0;
 755
 756         /* get all SCSI buffers need to repost to a local list */
 757         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 758         spin_lock(&phba->scsi_buf_list_put_lock);
 759         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 760         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 761         spin_unlock(&phba->scsi_buf_list_put_lock);
 762         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 763
 764         /* post the list of scsi buffer sgls to port if available */
 765         if (!list_empty(&post_sblist)) {
 766                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 767                                                 phba->sli4_hba.scsi_xri_cnt);
 768                 /* failed to post any scsi buffer, return error */
 769                 if (num_posted == 0)
 770                         rc = -EIO;
 771         }
 772         return rc;
 773 }
 774
 775 /**
 776  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 777  * @vport: The virtual port for which this call being executed.
 778  * @num_to_allocate: The requested number of buffers to allocate.
 779  *
 780  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 781  * the scsi buffer contains all the necessary information needed to initiate
 782  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 783  * them on a list, it post them to the port by using SGL block post.
 784  *
 785  * Return codes:
 786  *   int - number of scsi buffers that were allocated and posted.
 787  *   0 = failure, less than num_to_alloc is a partial failure.
 788  **/
 789 static int
 790 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 791 {
 792         struct lpfc_hba *phba = vport->phba;
 793         struct lpfc_scsi_buf *psb;
 794         struct sli4_sge *sgl;
 795         IOCB_t *iocb;
 796         dma_addr_t pdma_phys_fcp_cmd;
 797         dma_addr_t pdma_phys_fcp_rsp;
 798         dma_addr_t pdma_phys_bpl;
 799         uint16_t iotag, lxri = 0;
 800         int bcnt, num_posted, sgl_size;
 801         LIST_HEAD(prep_sblist);
 802         LIST_HEAD(post_sblist);
 803         LIST_HEAD(scsi_sblist);
 804
 805         sgl_size = phba->cfg_sg_dma_buf_size -
 806                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 807
 808         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 809                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 810                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 811                          (int)sizeof(struct fcp_cmnd),
 812                          (int)sizeof(struct fcp_rsp));
 813
 814         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 815                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 816                 if (!psb)
 817                         break;
 818                 /*
 819                  * Get memory from the pci pool to map the virt space to
 820                  * pci bus space for an I/O. The DMA buffer includes space
 821                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 822                  * of bde's necessary to support the sg_tablesize.
 823                  */
 824                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 825                                                 GFP_KERNEL, &psb->dma_handle);
 826                 if (!psb->data) {
 827                         kfree(psb);
 828                         break;
 829                 }
 830                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 831
 832                 /*
 833                  * 4K Page alignment is CRITICAL to BlockGuard, double check
 834                  * to be sure.
 835                  */
 836                 if (phba->cfg_enable_bg  && (((unsigned long)(psb->data) &
 837                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
 838                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 839                                       psb->data, psb->dma_handle);
 840                         kfree(psb);
 841                         break;
 842                 }
 843
 844
 845                 lxri = lpfc_sli4_next_xritag(phba);
 846                 if (lxri == NO_XRI) {
 847                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 848                               psb->data, psb->dma_handle);
 849                         kfree(psb);
 850                         break;
 851                 }
 852
 853                 /* Allocate iotag for psb->cur_iocbq. */
 854                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 855                 if (iotag == 0) {
 856                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 857                                 psb->data, psb->dma_handle);
 858                         kfree(psb);
 859                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 860                                         "3368 Failed to allocated IOTAG for"
 861                                         " XRI:0x%x\n", lxri);
 862                         lpfc_sli4_free_xri(phba, lxri);
 863                         break;
 864                 }
 865                 psb->cur_iocbq.sli4_lxritag = lxri;
 866                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 867                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 868                 psb->fcp_bpl = psb->data;
 869                 psb->fcp_cmnd = (psb->data + sgl_size);
 870                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 871                                         sizeof(struct fcp_cmnd));
 872
 873                 /* Initialize local short-hand pointers. */
 874                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 875                 pdma_phys_bpl = psb->dma_handle;
 876                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
 877                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 878
 879                 /*
 880                  * The first two bdes are the FCP_CMD and FCP_RSP.
 881                  * The balance are sg list bdes. Initialize the
 882                  * first two and leave the rest for queuecommand.
 883                  */
 884                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 885                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 886                 sgl->word2 = le32_to_cpu(sgl->word2);
 887                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 888                 sgl->word2 = cpu_to_le32(sgl->word2);
 889                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 890                 sgl++;
 891
 892                 /* Setup the physical region for the FCP RSP */
 893                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 894                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 895                 sgl->word2 = le32_to_cpu(sgl->word2);
 896                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 897                 sgl->word2 = cpu_to_le32(sgl->word2);
 898                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 899
 900                 /*
 901                  * Since the IOCB for the FCP I/O is built into this
 902                  * lpfc_scsi_buf, initialize it with all known data now.
 903                  */
 904                 iocb = &psb->cur_iocbq.iocb;
 905                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 906                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 907                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
 908                  * We are setting the bpl to point to out sgl. An sgl's
 909                  * entries are 16 bytes, a bpl entries are 12 bytes.
 910                  */
 911                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 912                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 913                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 914                 iocb->ulpBdeCount = 1;
 915                 iocb->ulpLe = 1;
 916                 iocb->ulpClass = CLASS3;
 917                 psb->cur_iocbq.context1 = psb;
 918                 psb->dma_phys_bpl = pdma_phys_bpl;
 919
 920                 /* add the scsi buffer to a post list */
 921                 list_add_tail(&psb->list, &post_sblist);
 922                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
 923                 phba->sli4_hba.scsi_xri_cnt++;
 924                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 925         }
 926         lpfc_printf_log(phba, KERN_INFO, LOG_BG,
 927                         "3021 Allocate %d out of %d requested new SCSI "
 928                         "buffers\n", bcnt, num_to_alloc);
 929
 930         /* post the list of scsi buffer sgls to port if available */
 931         if (!list_empty(&post_sblist))
 932                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
 933                                                           &post_sblist, bcnt);
 934         else
 935                 num_posted = 0;
 936
 937         return num_posted;
 938 }
 939
 940 /**
 941  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 942  * @vport: The virtual port for which this call being executed.
 943  * @num_to_allocate: The requested number of buffers to allocate.
 944  *
 945  * This routine wraps the actual SCSI buffer allocator function pointer from
 946  * the lpfc_hba struct.
 947  *
 948  * Return codes:
 949  *   int - number of scsi buffers that were allocated.
 950  *   0 = failure, less than num_to_alloc is a partial failure.
 951  **/
 952 static inline int
 953 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
 954 {
 955         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
 956 }
 957
 958 /**
 959  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 960  * @phba: The HBA for which this call is being executed.
 961  *
 962  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 963  * and returns to caller.
 964  *
 965  * Return codes:
 966  *   NULL - Error
 967  *   Pointer to lpfc_scsi_buf - Success
 968  **/
 969 static struct lpfc_scsi_buf*
 970 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 971 {
 972         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 973         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
 974         unsigned long iflag = 0;
 975
 976         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
 977         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
 978                          list);
 979         if (!lpfc_cmd) {
 980                 spin_lock(&phba->scsi_buf_list_put_lock);
 981                 list_splice(&phba->lpfc_scsi_buf_list_put,
 982                             &phba->lpfc_scsi_buf_list_get);
 983                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
 984                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
 985                                  struct lpfc_scsi_buf, list);
 986                 spin_unlock(&phba->scsi_buf_list_put_lock);
 987         }
 988         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
 989         return  lpfc_cmd;
 990 }
 991 /**
 992  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 993  * @phba: The HBA for which this call is being executed.
 994  *
 995  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 996  * and returns to caller.
 997  *
 998  * Return codes:
 999  *   NULL - Error
1000  *   Pointer to lpfc_scsi_buf - Success
1001  **/
1002 static struct lpfc_scsi_buf*
1003 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1004 {
1005         struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1006         unsigned long iflag = 0;
1007         int found = 0;
1008
1009         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1010         list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1011                                  &phba->lpfc_scsi_buf_list_get, list) {
1012                 if (lpfc_test_rrq_active(phba, ndlp,
1013                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1014                         continue;
1015                 list_del(&lpfc_cmd->list);
1016                 found = 1;
1017                 break;
1018         }
1019         if (!found) {
1020                 spin_lock(&phba->scsi_buf_list_put_lock);
1021                 list_splice(&phba->lpfc_scsi_buf_list_put,
1022                             &phba->lpfc_scsi_buf_list_get);
1023                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1024                 spin_unlock(&phba->scsi_buf_list_put_lock);
1025                 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1026                                          &phba->lpfc_scsi_buf_list_get, list) {
1027                         if (lpfc_test_rrq_active(
1028                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1029                                 continue;
1030                         list_del(&lpfc_cmd->list);
1031                         found = 1;
1032                         break;
1033                 }
1034         }
1035         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1036         if (!found)
1037                 return NULL;
1038         return  lpfc_cmd;
1039 }
1040 /**
1041  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1042  * @phba: The HBA for which this call is being executed.
1043  *
1044  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1045  * and returns to caller.
1046  *
1047  * Return codes:
1048  *   NULL - Error
1049  *   Pointer to lpfc_scsi_buf - Success
1050  **/
1051 static struct lpfc_scsi_buf*
1052 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1053 {
1054         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1055 }
1056
1057 /**
1058  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1059  * @phba: The Hba for which this call is being executed.
1060  * @psb: The scsi buffer which is being released.
1061  *
1062  * This routine releases @psb scsi buffer by adding it to tail of @phba
1063  * lpfc_scsi_buf_list list.
1064  **/
1065 static void
1066 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1067 {
1068         unsigned long iflag = 0;
1069
1070         psb->seg_cnt = 0;
1071         psb->nonsg_phys = 0;
1072         psb->prot_seg_cnt = 0;
1073
1074         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1075         psb->pCmd = NULL;
1076         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1077         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1078         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1079 }
1080
1081 /**
1082  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1083  * @phba: The Hba for which this call is being executed.
1084  * @psb: The scsi buffer which is being released.
1085  *
1086  * This routine releases @psb scsi buffer by adding it to tail of @phba
1087  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1088  * and cannot be reused for at least RA_TOV amount of time if it was
1089  * aborted.
1090  **/
1091 static void
1092 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1093 {
1094         unsigned long iflag = 0;
1095
1096         psb->seg_cnt = 0;
1097         psb->nonsg_phys = 0;
1098         psb->prot_seg_cnt = 0;
1099
1100         if (psb->exch_busy) {
1101                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1102                                         iflag);
1103                 psb->pCmd = NULL;
1104                 list_add_tail(&psb->list,
1105                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1106                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1107                                         iflag);
1108         } else {
1109                 psb->pCmd = NULL;
1110                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1111                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1112                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1113                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1114         }
1115 }
1116
1117 /**
1118  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1119  * @phba: The Hba for which this call is being executed.
1120  * @psb: The scsi buffer which is being released.
1121  *
1122  * This routine releases @psb scsi buffer by adding it to tail of @phba
1123  * lpfc_scsi_buf_list list.
1124  **/
1125 static void
1126 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1127 {
1128
1129         phba->lpfc_release_scsi_buf(phba, psb);
1130 }
1131
1132 /**
1133  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1134  * @phba: The Hba for which this call is being executed.
1135  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1136  *
1137  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1138  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1139  * through sg elements and format the bdea. This routine also initializes all
1140  * IOCB fields which are dependent on scsi command request buffer.
1141  *
1142  * Return codes:
1143  *   1 - Error
1144  *   0 - Success
1145  **/
1146 static int
1147 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1148 {
1149         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1150         struct scatterlist *sgel = NULL;
1151         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1152         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1153         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1154         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1155         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1156         dma_addr_t physaddr;
1157         uint32_t num_bde = 0;
1158         int nseg, datadir = scsi_cmnd->sc_data_direction;
1159
1160         /*
1161          * There are three possibilities here - use scatter-gather segment, use
1162          * the single mapping, or neither.  Start the lpfc command prep by
1163          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1164          * data bde entry.
1165          */
1166         bpl += 2;
1167         if (scsi_sg_count(scsi_cmnd)) {
1168                 /*
1169                  * The driver stores the segment count returned from pci_map_sg
1170                  * because this a count of dma-mappings used to map the use_sg
1171                  * pages.  They are not guaranteed to be the same for those
1172                  * architectures that implement an IOMMU.
1173                  */
1174
1175                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1176                                   scsi_sg_count(scsi_cmnd), datadir);
1177                 if (unlikely(!nseg))
1178                         return 1;
1179
1180                 lpfc_cmd->seg_cnt = nseg;
1181                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1182                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1183                                 "9064 BLKGRD: %s: Too many sg segments from "
1184                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1185                                __func__, phba->cfg_sg_seg_cnt,
1186                                lpfc_cmd->seg_cnt);
1187                         lpfc_cmd->seg_cnt = 0;
1188                         scsi_dma_unmap(scsi_cmnd);
1189                         return 1;
1190                 }
1191
1192                 /*
1193                  * The driver established a maximum scatter-gather segment count
1194                  * during probe that limits the number of sg elements in any
1195                  * single scsi command.  Just run through the seg_cnt and format
1196                  * the bde's.
1197                  * When using SLI-3 the driver will try to fit all the BDEs into
1198                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1199                  * does for SLI-2 mode.
1200                  */
1201                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1202                         physaddr = sg_dma_address(sgel);
1203                         if (phba->sli_rev == 3 &&
1204                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1205                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1206                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1207                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1208                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1209                                 data_bde->addrLow = putPaddrLow(physaddr);
1210                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1211                                 data_bde++;
1212                         } else {
1213                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1214                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1215                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1216                                 bpl->addrLow =
1217                                         le32_to_cpu(putPaddrLow(physaddr));
1218                                 bpl->addrHigh =
1219                                         le32_to_cpu(putPaddrHigh(physaddr));
1220                                 bpl++;
1221                         }
1222                 }
1223         }
1224
1225         /*
1226          * Finish initializing those IOCB fields that are dependent on the
1227          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1228          * explicitly reinitialized and for SLI-3 the extended bde count is
1229          * explicitly reinitialized since all iocb memory resources are reused.
1230          */
1231         if (phba->sli_rev == 3 &&
1232             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1233             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1234                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1235                         /*
1236                          * The extended IOCB format can only fit 3 BDE or a BPL.
1237                          * This I/O has more than 3 BDE so the 1st data bde will
1238                          * be a BPL that is filled in here.
1239                          */
1240                         physaddr = lpfc_cmd->dma_handle;
1241                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1242                         data_bde->tus.f.bdeSize = (num_bde *
1243                                                    sizeof(struct ulp_bde64));
1244                         physaddr += (sizeof(struct fcp_cmnd) +
1245                                      sizeof(struct fcp_rsp) +
1246                                      (2 * sizeof(struct ulp_bde64)));
1247                         data_bde->addrHigh = putPaddrHigh(physaddr);
1248                         data_bde->addrLow = putPaddrLow(physaddr);
1249                         /* ebde count includes the response bde and data bpl */
1250                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1251                 } else {
1252                         /* ebde count includes the response bde and data bdes */
1253                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1254                 }
1255         } else {
1256                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1257                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1258                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1259         }
1260         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1261
1262         /*
1263          * Due to difference in data length between DIF/non-DIF paths,
1264          * we need to set word 4 of IOCB here
1265          */
1266         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1267         return 0;
1268 }
1269
1270 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1271
1272 /* Return if if error injection is detected by Initiator */
1273 #define BG_ERR_INIT     0x1
1274 /* Return if if error injection is detected by Target */
1275 #define BG_ERR_TGT      0x2
1276 /* Return if if swapping CSUM<-->CRC is required for error injection */
1277 #define BG_ERR_SWAP     0x10
1278 /* Return if disabling Guard/Ref/App checking is required for error injection */
1279 #define BG_ERR_CHECK    0x20
1280
1281 /**
1282  * lpfc_bg_err_inject - Determine if we should inject an error
1283  * @phba: The Hba for which this call is being executed.
1284  * @sc: The SCSI command to examine
1285  * @reftag: (out) BlockGuard reference tag for transmitted data
1286  * @apptag: (out) BlockGuard application tag for transmitted data
1287  * @new_guard (in) Value to replace CRC with if needed
1288  *
1289  * Returns BG_ERR_* bit mask or 0 if request ignored
1290  **/
1291 static int
1292 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1293                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1294 {
1295         struct scatterlist *sgpe; /* s/g prot entry */
1296         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1297         struct scsi_dif_tuple *src = NULL;
1298         struct lpfc_nodelist *ndlp;
1299         struct lpfc_rport_data *rdata;
1300         uint32_t op = scsi_get_prot_op(sc);
1301         uint32_t blksize;
1302         uint32_t numblks;
1303         sector_t lba;
1304         int rc = 0;
1305         int blockoff = 0;
1306
1307         if (op == SCSI_PROT_NORMAL)
1308                 return 0;
1309
1310         sgpe = scsi_prot_sglist(sc);
1311         lba = scsi_get_lba(sc);
1312
1313         /* First check if we need to match the LBA */
1314         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1315                 blksize = lpfc_cmd_blksize(sc);
1316                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1317
1318                 /* Make sure we have the right LBA if one is specified */
1319                 if ((phba->lpfc_injerr_lba < lba) ||
1320                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1321                         return 0;
1322                 if (sgpe) {
1323                         blockoff = phba->lpfc_injerr_lba - lba;
1324                         numblks = sg_dma_len(sgpe) /
1325                                 sizeof(struct scsi_dif_tuple);
1326                         if (numblks < blockoff)
1327                                 blockoff = numblks;
1328                 }
1329         }
1330
1331         /* Next check if we need to match the remote NPortID or WWPN */
1332         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1333         if (rdata && rdata->pnode) {
1334                 ndlp = rdata->pnode;
1335
1336                 /* Make sure we have the right NPortID if one is specified */
1337                 if (phba->lpfc_injerr_nportid  &&
1338                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1339                         return 0;
1340
1341                 /*
1342                  * Make sure we have the right WWPN if one is specified.
1343                  * wwn[0] should be a non-zero NAA in a good WWPN.
1344                  */
1345                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1346                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1347                                 sizeof(struct lpfc_name)) != 0))
1348                         return 0;
1349         }
1350
1351         /* Setup a ptr to the protection data if the SCSI host provides it */
1352         if (sgpe) {
1353                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1354                 src += blockoff;
1355                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1356         }
1357
1358         /* Should we change the Reference Tag */
1359         if (reftag) {
1360                 if (phba->lpfc_injerr_wref_cnt) {
1361                         switch (op) {
1362                         case SCSI_PROT_WRITE_PASS:
1363                                 if (src) {
1364                                         /*
1365                                          * For WRITE_PASS, force the error
1366                                          * to be sent on the wire. It should
1367                                          * be detected by the Target.
1368                                          * If blockoff != 0 error will be
1369                                          * inserted in middle of the IO.
1370                                          */
1371
1372                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1373                                         "9076 BLKGRD: Injecting reftag error: "
1374                                         "write lba x%lx + x%x oldrefTag x%x\n",
1375                                         (unsigned long)lba, blockoff,
1376                                         be32_to_cpu(src->ref_tag));
1377
1378                                         /*
1379                                          * Save the old ref_tag so we can
1380                                          * restore it on completion.
1381                                          */
1382                                         if (lpfc_cmd) {
1383                                                 lpfc_cmd->prot_data_type =
1384                                                         LPFC_INJERR_REFTAG;
1385                                                 lpfc_cmd->prot_data_segment =
1386                                                         src;
1387                                                 lpfc_cmd->prot_data =
1388                                                         src->ref_tag;
1389                                         }
1390                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1391                                         phba->lpfc_injerr_wref_cnt--;
1392                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1393                                                 phba->lpfc_injerr_nportid = 0;
1394                                                 phba->lpfc_injerr_lba =
1395                                                         LPFC_INJERR_LBA_OFF;
1396                                                 memset(&phba->lpfc_injerr_wwpn,
1397                                                   0, sizeof(struct lpfc_name));
1398                                         }
1399                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1400
1401                                         break;
1402                                 }
1403                                 /* Drop thru */
1404                         case SCSI_PROT_WRITE_INSERT:
1405                                 /*
1406                                  * For WRITE_INSERT, force the error
1407                                  * to be sent on the wire. It should be
1408                                  * detected by the Target.
1409                                  */
1410                                 /* DEADBEEF will be the reftag on the wire */
1411                                 *reftag = 0xDEADBEEF;
1412                                 phba->lpfc_injerr_wref_cnt--;
1413                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1414                                         phba->lpfc_injerr_nportid = 0;
1415                                         phba->lpfc_injerr_lba =
1416                                         LPFC_INJERR_LBA_OFF;
1417                                         memset(&phba->lpfc_injerr_wwpn,
1418                                                 0, sizeof(struct lpfc_name));
1419                                 }
1420                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1421
1422                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1423                                         "9078 BLKGRD: Injecting reftag error: "
1424                                         "write lba x%lx\n", (unsigned long)lba);
1425                                 break;
1426                         case SCSI_PROT_WRITE_STRIP:
1427                                 /*
1428                                  * For WRITE_STRIP and WRITE_PASS,
1429                                  * force the error on data
1430                                  * being copied from SLI-Host to SLI-Port.
1431                                  */
1432                                 *reftag = 0xDEADBEEF;
1433                                 phba->lpfc_injerr_wref_cnt--;
1434                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1435                                         phba->lpfc_injerr_nportid = 0;
1436                                         phba->lpfc_injerr_lba =
1437                                                 LPFC_INJERR_LBA_OFF;
1438                                         memset(&phba->lpfc_injerr_wwpn,
1439                                                 0, sizeof(struct lpfc_name));
1440                                 }
1441                                 rc = BG_ERR_INIT;
1442
1443                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1444                                         "9077 BLKGRD: Injecting reftag error: "
1445                                         "write lba x%lx\n", (unsigned long)lba);
1446                                 break;
1447                         }
1448                 }
1449                 if (phba->lpfc_injerr_rref_cnt) {
1450                         switch (op) {
1451                         case SCSI_PROT_READ_INSERT:
1452                         case SCSI_PROT_READ_STRIP:
1453                         case SCSI_PROT_READ_PASS:
1454                                 /*
1455                                  * For READ_STRIP and READ_PASS, force the
1456                                  * error on data being read off the wire. It
1457                                  * should force an IO error to the driver.
1458                                  */
1459                                 *reftag = 0xDEADBEEF;
1460                                 phba->lpfc_injerr_rref_cnt--;
1461                                 if (phba->lpfc_injerr_rref_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                                         "9079 BLKGRD: Injecting reftag error: "
1472                                         "read lba x%lx\n", (unsigned long)lba);
1473                                 break;
1474                         }
1475                 }
1476         }
1477
1478         /* Should we change the Application Tag */
1479         if (apptag) {
1480                 if (phba->lpfc_injerr_wapp_cnt) {
1481                         switch (op) {
1482                         case SCSI_PROT_WRITE_PASS:
1483                                 if (src) {
1484                                         /*
1485                                          * For WRITE_PASS, force the error
1486                                          * to be sent on the wire. It should
1487                                          * be detected by the Target.
1488                                          * If blockoff != 0 error will be
1489                                          * inserted in middle of the IO.
1490                                          */
1491
1492                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1493                                         "9080 BLKGRD: Injecting apptag error: "
1494                                         "write lba x%lx + x%x oldappTag x%x\n",
1495                                         (unsigned long)lba, blockoff,
1496                                         be16_to_cpu(src->app_tag));
1497
1498                                         /*
1499                                          * Save the old app_tag so we can
1500                                          * restore it on completion.
1501                                          */
1502                                         if (lpfc_cmd) {
1503                                                 lpfc_cmd->prot_data_type =
1504                                                         LPFC_INJERR_APPTAG;
1505                                                 lpfc_cmd->prot_data_segment =
1506                                                         src;
1507                                                 lpfc_cmd->prot_data =
1508                                                         src->app_tag;
1509                                         }
1510                                         src->app_tag = cpu_to_be16(0xDEAD);
1511                                         phba->lpfc_injerr_wapp_cnt--;
1512                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1513                                                 phba->lpfc_injerr_nportid = 0;
1514                                                 phba->lpfc_injerr_lba =
1515                                                         LPFC_INJERR_LBA_OFF;
1516                                                 memset(&phba->lpfc_injerr_wwpn,
1517                                                   0, sizeof(struct lpfc_name));
1518                                         }
1519                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1520                                         break;
1521                                 }
1522                                 /* Drop thru */
1523                         case SCSI_PROT_WRITE_INSERT:
1524                                 /*
1525                                  * For WRITE_INSERT, force the
1526                                  * error to be sent on the wire. It should be
1527                                  * detected by the Target.
1528                                  */
1529                                 /* DEAD will be the apptag on the wire */
1530                                 *apptag = 0xDEAD;
1531                                 phba->lpfc_injerr_wapp_cnt--;
1532                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1533                                         phba->lpfc_injerr_nportid = 0;
1534                                         phba->lpfc_injerr_lba =
1535                                                 LPFC_INJERR_LBA_OFF;
1536                                         memset(&phba->lpfc_injerr_wwpn,
1537                                                 0, sizeof(struct lpfc_name));
1538                                 }
1539                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1540
1541                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1542                                         "0813 BLKGRD: Injecting apptag error: "
1543                                         "write lba x%lx\n", (unsigned long)lba);
1544                                 break;
1545                         case SCSI_PROT_WRITE_STRIP:
1546                                 /*
1547                                  * For WRITE_STRIP and WRITE_PASS,
1548                                  * force the error on data
1549                                  * being copied from SLI-Host to SLI-Port.
1550                                  */
1551                                 *apptag = 0xDEAD;
1552                                 phba->lpfc_injerr_wapp_cnt--;
1553                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1554                                         phba->lpfc_injerr_nportid = 0;
1555                                         phba->lpfc_injerr_lba =
1556                                                 LPFC_INJERR_LBA_OFF;
1557                                         memset(&phba->lpfc_injerr_wwpn,
1558                                                 0, sizeof(struct lpfc_name));
1559                                 }
1560                                 rc = BG_ERR_INIT;
1561
1562                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1563                                         "0812 BLKGRD: Injecting apptag error: "
1564                                         "write lba x%lx\n", (unsigned long)lba);
1565                                 break;
1566                         }
1567                 }
1568                 if (phba->lpfc_injerr_rapp_cnt) {
1569                         switch (op) {
1570                         case SCSI_PROT_READ_INSERT:
1571                         case SCSI_PROT_READ_STRIP:
1572                         case SCSI_PROT_READ_PASS:
1573                                 /*
1574                                  * For READ_STRIP and READ_PASS, force the
1575                                  * error on data being read off the wire. It
1576                                  * should force an IO error to the driver.
1577                                  */
1578                                 *apptag = 0xDEAD;
1579                                 phba->lpfc_injerr_rapp_cnt--;
1580                                 if (phba->lpfc_injerr_rapp_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                                         "0814 BLKGRD: Injecting apptag error: "
1591                                         "read lba x%lx\n", (unsigned long)lba);
1592                                 break;
1593                         }
1594                 }
1595         }
1596
1597
1598         /* Should we change the Guard Tag */
1599         if (new_guard) {
1600                 if (phba->lpfc_injerr_wgrd_cnt) {
1601                         switch (op) {
1602                         case SCSI_PROT_WRITE_PASS:
1603                                 rc = BG_ERR_CHECK;
1604                                 /* Drop thru */
1605
1606                         case SCSI_PROT_WRITE_INSERT:
1607                                 /*
1608                                  * For WRITE_INSERT, force the
1609                                  * error to be sent on the wire. It should be
1610                                  * detected by the Target.
1611                                  */
1612                                 phba->lpfc_injerr_wgrd_cnt--;
1613                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1614                                         phba->lpfc_injerr_nportid = 0;
1615                                         phba->lpfc_injerr_lba =
1616                                                 LPFC_INJERR_LBA_OFF;
1617                                         memset(&phba->lpfc_injerr_wwpn,
1618                                                 0, sizeof(struct lpfc_name));
1619                                 }
1620
1621                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1622                                 /* Signals the caller to swap CRC->CSUM */
1623
1624                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1625                                         "0817 BLKGRD: Injecting guard error: "
1626                                         "write lba x%lx\n", (unsigned long)lba);
1627                                 break;
1628                         case SCSI_PROT_WRITE_STRIP:
1629                                 /*
1630                                  * For WRITE_STRIP and WRITE_PASS,
1631                                  * force the error on data
1632                                  * being copied from SLI-Host to SLI-Port.
1633                                  */
1634                                 phba->lpfc_injerr_wgrd_cnt--;
1635                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1636                                         phba->lpfc_injerr_nportid = 0;
1637                                         phba->lpfc_injerr_lba =
1638                                                 LPFC_INJERR_LBA_OFF;
1639                                         memset(&phba->lpfc_injerr_wwpn,
1640                                                 0, sizeof(struct lpfc_name));
1641                                 }
1642
1643                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1644                                 /* Signals the caller to swap CRC->CSUM */
1645
1646                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1647                                         "0816 BLKGRD: Injecting guard error: "
1648                                         "write lba x%lx\n", (unsigned long)lba);
1649                                 break;
1650                         }
1651                 }
1652                 if (phba->lpfc_injerr_rgrd_cnt) {
1653                         switch (op) {
1654                         case SCSI_PROT_READ_INSERT:
1655                         case SCSI_PROT_READ_STRIP:
1656                         case SCSI_PROT_READ_PASS:
1657                                 /*
1658                                  * For READ_STRIP and READ_PASS, force the
1659                                  * error on data being read off the wire. It
1660                                  * should force an IO error to the driver.
1661                                  */
1662                                 phba->lpfc_injerr_rgrd_cnt--;
1663                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1664                                         phba->lpfc_injerr_nportid = 0;
1665                                         phba->lpfc_injerr_lba =
1666                                                 LPFC_INJERR_LBA_OFF;
1667                                         memset(&phba->lpfc_injerr_wwpn,
1668                                                 0, sizeof(struct lpfc_name));
1669                                 }
1670
1671                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1672                                 /* Signals the caller to swap CRC->CSUM */
1673
1674                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1675                                         "0818 BLKGRD: Injecting guard error: "
1676                                         "read lba x%lx\n", (unsigned long)lba);
1677                         }
1678                 }
1679         }
1680
1681         return rc;
1682 }
1683 #endif
1684
1685 /**
1686  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1687  * the specified SCSI command.
1688  * @phba: The Hba for which this call is being executed.
1689  * @sc: The SCSI command to examine
1690  * @txopt: (out) BlockGuard operation for transmitted data
1691  * @rxopt: (out) BlockGuard operation for received data
1692  *
1693  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1694  *
1695  **/
1696 static int
1697 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1698                 uint8_t *txop, uint8_t *rxop)
1699 {
1700         uint8_t ret = 0;
1701
1702         if (lpfc_cmd_guard_csum(sc)) {
1703                 switch (scsi_get_prot_op(sc)) {
1704                 case SCSI_PROT_READ_INSERT:
1705                 case SCSI_PROT_WRITE_STRIP:
1706                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1707                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1708                         break;
1709
1710                 case SCSI_PROT_READ_STRIP:
1711                 case SCSI_PROT_WRITE_INSERT:
1712                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1713                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1714                         break;
1715
1716                 case SCSI_PROT_READ_PASS:
1717                 case SCSI_PROT_WRITE_PASS:
1718                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1719                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1720                         break;
1721
1722                 case SCSI_PROT_NORMAL:
1723                 default:
1724                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1725                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1726                                         scsi_get_prot_op(sc));
1727                         ret = 1;
1728                         break;
1729
1730                 }
1731         } else {
1732                 switch (scsi_get_prot_op(sc)) {
1733                 case SCSI_PROT_READ_STRIP:
1734                 case SCSI_PROT_WRITE_INSERT:
1735                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1736                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1737                         break;
1738
1739                 case SCSI_PROT_READ_PASS:
1740                 case SCSI_PROT_WRITE_PASS:
1741                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1742                         *txop = BG_OP_IN_CRC_OUT_CRC;
1743                         break;
1744
1745                 case SCSI_PROT_READ_INSERT:
1746                 case SCSI_PROT_WRITE_STRIP:
1747                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1748                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1749                         break;
1750
1751                 case SCSI_PROT_NORMAL:
1752                 default:
1753                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1754                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1755                                         scsi_get_prot_op(sc));
1756                         ret = 1;
1757                         break;
1758                 }
1759         }
1760
1761         return ret;
1762 }
1763
1764 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1765 /**
1766  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1767  * the specified SCSI command in order to force a guard tag error.
1768  * @phba: The Hba for which this call is being executed.
1769  * @sc: The SCSI command to examine
1770  * @txopt: (out) BlockGuard operation for transmitted data
1771  * @rxopt: (out) BlockGuard operation for received data
1772  *
1773  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1774  *
1775  **/
1776 static int
1777 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1778                 uint8_t *txop, uint8_t *rxop)
1779 {
1780         uint8_t ret = 0;
1781
1782         if (lpfc_cmd_guard_csum(sc)) {
1783                 switch (scsi_get_prot_op(sc)) {
1784                 case SCSI_PROT_READ_INSERT:
1785                 case SCSI_PROT_WRITE_STRIP:
1786                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1787                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1788                         break;
1789
1790                 case SCSI_PROT_READ_STRIP:
1791                 case SCSI_PROT_WRITE_INSERT:
1792                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1793                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1794                         break;
1795
1796                 case SCSI_PROT_READ_PASS:
1797                 case SCSI_PROT_WRITE_PASS:
1798                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1799                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1800                         break;
1801
1802                 case SCSI_PROT_NORMAL:
1803                 default:
1804                         break;
1805
1806                 }
1807         } else {
1808                 switch (scsi_get_prot_op(sc)) {
1809                 case SCSI_PROT_READ_STRIP:
1810                 case SCSI_PROT_WRITE_INSERT:
1811                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1812                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1813                         break;
1814
1815                 case SCSI_PROT_READ_PASS:
1816                 case SCSI_PROT_WRITE_PASS:
1817                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1818                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1819                         break;
1820
1821                 case SCSI_PROT_READ_INSERT:
1822                 case SCSI_PROT_WRITE_STRIP:
1823                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1824                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1825                         break;
1826
1827                 case SCSI_PROT_NORMAL:
1828                 default:
1829                         break;
1830                 }
1831         }
1832
1833         return ret;
1834 }
1835 #endif
1836
1837 /**
1838  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1839  * @phba: The Hba for which this call is being executed.
1840  * @sc: pointer to scsi command we're working on
1841  * @bpl: pointer to buffer list for protection groups
1842  * @datacnt: number of segments of data that have been dma mapped
1843  *
1844  * This function sets up BPL buffer list for protection groups of
1845  * type LPFC_PG_TYPE_NO_DIF
1846  *
1847  * This is usually used when the HBA is instructed to generate
1848  * DIFs and insert them into data stream (or strip DIF from
1849  * incoming data stream)
1850  *
1851  * The buffer list consists of just one protection group described
1852  * below:
1853  *                                +-------------------------+
1854  *   start of prot group  -->     |          PDE_5          |
1855  *                                +-------------------------+
1856  *                                |          PDE_6          |
1857  *                                +-------------------------+
1858  *                                |         Data BDE        |
1859  *                                +-------------------------+
1860  *                                |more Data BDE's ... (opt)|
1861  *                                +-------------------------+
1862  *
1863  *
1864  * Note: Data s/g buffers have been dma mapped
1865  *
1866  * Returns the number of BDEs added to the BPL.
1867  **/
1868 static int
1869 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1870                 struct ulp_bde64 *bpl, int datasegcnt)
1871 {
1872         struct scatterlist *sgde = NULL; /* s/g data entry */
1873         struct lpfc_pde5 *pde5 = NULL;
1874         struct lpfc_pde6 *pde6 = NULL;
1875         dma_addr_t physaddr;
1876         int i = 0, num_bde = 0, status;
1877         int datadir = sc->sc_data_direction;
1878 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1879         uint32_t rc;
1880 #endif
1881         uint32_t checking = 1;
1882         uint32_t reftag;
1883         uint8_t txop, rxop;
1884
1885         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1886         if (status)
1887                 goto out;
1888
1889         /* extract some info from the scsi command for pde*/
1890         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1891
1892 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1893         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1894         if (rc) {
1895                 if (rc & BG_ERR_SWAP)
1896                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1897                 if (rc & BG_ERR_CHECK)
1898                         checking = 0;
1899         }
1900 #endif
1901
1902         /* setup PDE5 with what we have */
1903         pde5 = (struct lpfc_pde5 *) bpl;
1904         memset(pde5, 0, sizeof(struct lpfc_pde5));
1905         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1906
1907         /* Endianness conversion if necessary for PDE5 */
1908         pde5->word0 = cpu_to_le32(pde5->word0);
1909         pde5->reftag = cpu_to_le32(reftag);
1910
1911         /* advance bpl and increment bde count */
1912         num_bde++;
1913         bpl++;
1914         pde6 = (struct lpfc_pde6 *) bpl;
1915
1916         /* setup PDE6 with the rest of the info */
1917         memset(pde6, 0, sizeof(struct lpfc_pde6));
1918         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1919         bf_set(pde6_optx, pde6, txop);
1920         bf_set(pde6_oprx, pde6, rxop);
1921
1922         /*
1923          * We only need to check the data on READs, for WRITEs
1924          * protection data is automatically generated, not checked.
1925          */
1926         if (datadir == DMA_FROM_DEVICE) {
1927                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1928                         bf_set(pde6_ce, pde6, checking);
1929                 else
1930                         bf_set(pde6_ce, pde6, 0);
1931
1932                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1933                         bf_set(pde6_re, pde6, checking);
1934                 else
1935                         bf_set(pde6_re, pde6, 0);
1936         }
1937         bf_set(pde6_ai, pde6, 1);
1938         bf_set(pde6_ae, pde6, 0);
1939         bf_set(pde6_apptagval, pde6, 0);
1940
1941         /* Endianness conversion if necessary for PDE6 */
1942         pde6->word0 = cpu_to_le32(pde6->word0);
1943         pde6->word1 = cpu_to_le32(pde6->word1);
1944         pde6->word2 = cpu_to_le32(pde6->word2);
1945
1946         /* advance bpl and increment bde count */
1947         num_bde++;
1948         bpl++;
1949
1950         /* assumption: caller has already run dma_map_sg on command data */
1951         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1952                 physaddr = sg_dma_address(sgde);
1953                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1954                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1955                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1956                 if (datadir == DMA_TO_DEVICE)
1957                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1958                 else
1959                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1960                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1961                 bpl++;
1962                 num_bde++;
1963         }
1964
1965 out:
1966         return num_bde;
1967 }
1968
1969 /**
1970  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1971  * @phba: The Hba for which this call is being executed.
1972  * @sc: pointer to scsi command we're working on
1973  * @bpl: pointer to buffer list for protection groups
1974  * @datacnt: number of segments of data that have been dma mapped
1975  * @protcnt: number of segment of protection data that have been dma mapped
1976  *
1977  * This function sets up BPL buffer list for protection groups of
1978  * type LPFC_PG_TYPE_DIF
1979  *
1980  * This is usually used when DIFs are in their own buffers,
1981  * separate from the data. The HBA can then by instructed
1982  * to place the DIFs in the outgoing stream.  For read operations,
1983  * The HBA could extract the DIFs and place it in DIF buffers.
1984  *
1985  * The buffer list for this type consists of one or more of the
1986  * protection groups described below:
1987  *                                    +-------------------------+
1988  *   start of first prot group  -->   |          PDE_5          |
1989  *                                    +-------------------------+
1990  *                                    |          PDE_6          |
1991  *                                    +-------------------------+
1992  *                                    |      PDE_7 (Prot BDE)   |
1993  *                                    +-------------------------+
1994  *                                    |        Data BDE         |
1995  *                                    +-------------------------+
1996  *                                    |more Data BDE's ... (opt)|
1997  *                                    +-------------------------+
1998  *   start of new  prot group  -->    |          PDE_5          |
1999  *                                    +-------------------------+
2000  *                                    |          ...            |
2001  *                                    +-------------------------+
2002  *
2003  * Note: It is assumed that both data and protection s/g buffers have been
2004  *       mapped for DMA
2005  *
2006  * Returns the number of BDEs added to the BPL.
2007  **/
2008 static int
2009 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2010                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2011 {
2012         struct scatterlist *sgde = NULL; /* s/g data entry */
2013         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2014         struct lpfc_pde5 *pde5 = NULL;
2015         struct lpfc_pde6 *pde6 = NULL;
2016         struct lpfc_pde7 *pde7 = NULL;
2017         dma_addr_t dataphysaddr, protphysaddr;
2018         unsigned short curr_data = 0, curr_prot = 0;
2019         unsigned int split_offset;
2020         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2021         unsigned int protgrp_blks, protgrp_bytes;
2022         unsigned int remainder, subtotal;
2023         int status;
2024         int datadir = sc->sc_data_direction;
2025         unsigned char pgdone = 0, alldone = 0;
2026         unsigned blksize;
2027 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2028         uint32_t rc;
2029 #endif
2030         uint32_t checking = 1;
2031         uint32_t reftag;
2032         uint8_t txop, rxop;
2033         int num_bde = 0;
2034
2035         sgpe = scsi_prot_sglist(sc);
2036         sgde = scsi_sglist(sc);
2037
2038         if (!sgpe || !sgde) {
2039                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2040                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2041                                 sgpe, sgde);
2042                 return 0;
2043         }
2044
2045         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2046         if (status)
2047                 goto out;
2048
2049         /* extract some info from the scsi command */
2050         blksize = lpfc_cmd_blksize(sc);
2051         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2052
2053 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2054         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2055         if (rc) {
2056                 if (rc & BG_ERR_SWAP)
2057                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2058                 if (rc & BG_ERR_CHECK)
2059                         checking = 0;
2060         }
2061 #endif
2062
2063         split_offset = 0;
2064         do {
2065                 /* Check to see if we ran out of space */
2066                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2067                         return num_bde + 3;
2068
2069                 /* setup PDE5 with what we have */
2070                 pde5 = (struct lpfc_pde5 *) bpl;
2071                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2072                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2073
2074                 /* Endianness conversion if necessary for PDE5 */
2075                 pde5->word0 = cpu_to_le32(pde5->word0);
2076                 pde5->reftag = cpu_to_le32(reftag);
2077
2078                 /* advance bpl and increment bde count */
2079                 num_bde++;
2080                 bpl++;
2081                 pde6 = (struct lpfc_pde6 *) bpl;
2082
2083                 /* setup PDE6 with the rest of the info */
2084                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2085                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2086                 bf_set(pde6_optx, pde6, txop);
2087                 bf_set(pde6_oprx, pde6, rxop);
2088
2089                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2090                         bf_set(pde6_ce, pde6, checking);
2091                 else
2092                         bf_set(pde6_ce, pde6, 0);
2093
2094                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2095                         bf_set(pde6_re, pde6, checking);
2096                 else
2097                         bf_set(pde6_re, pde6, 0);
2098
2099                 bf_set(pde6_ai, pde6, 1);
2100                 bf_set(pde6_ae, pde6, 0);
2101                 bf_set(pde6_apptagval, pde6, 0);
2102
2103                 /* Endianness conversion if necessary for PDE6 */
2104                 pde6->word0 = cpu_to_le32(pde6->word0);
2105                 pde6->word1 = cpu_to_le32(pde6->word1);
2106                 pde6->word2 = cpu_to_le32(pde6->word2);
2107
2108                 /* advance bpl and increment bde count */
2109                 num_bde++;
2110                 bpl++;
2111
2112                 /* setup the first BDE that points to protection buffer */
2113                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2114                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2115
2116                 /* must be integer multiple of the DIF block length */
2117                 BUG_ON(protgroup_len % 8);
2118
2119                 pde7 = (struct lpfc_pde7 *) bpl;
2120                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2121                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2122
2123                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2124                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2125
2126                 protgrp_blks = protgroup_len / 8;
2127                 protgrp_bytes = protgrp_blks * blksize;
2128
2129                 /* check if this pde is crossing the 4K boundary; if so split */
2130                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2131                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2132                         protgroup_offset += protgroup_remainder;
2133                         protgrp_blks = protgroup_remainder / 8;
2134                         protgrp_bytes = protgrp_blks * blksize;
2135                 } else {
2136                         protgroup_offset = 0;
2137                         curr_prot++;
2138                 }
2139
2140                 num_bde++;
2141
2142                 /* setup BDE's for data blocks associated with DIF data */
2143                 pgdone = 0;
2144                 subtotal = 0; /* total bytes processed for current prot grp */
2145                 while (!pgdone) {
2146                         /* Check to see if we ran out of space */
2147                         if (num_bde >= phba->cfg_total_seg_cnt)
2148                                 return num_bde + 1;
2149
2150                         if (!sgde) {
2151                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2152                                         "9065 BLKGRD:%s Invalid data segment\n",
2153                                                 __func__);
2154                                 return 0;
2155                         }
2156                         bpl++;
2157                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2158                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2159                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2160
2161                         remainder = sg_dma_len(sgde) - split_offset;
2162
2163                         if ((subtotal + remainder) <= protgrp_bytes) {
2164                                 /* we can use this whole buffer */
2165                                 bpl->tus.f.bdeSize = remainder;
2166                                 split_offset = 0;
2167
2168                                 if ((subtotal + remainder) == protgrp_bytes)
2169                                         pgdone = 1;
2170                         } else {
2171                                 /* must split this buffer with next prot grp */
2172                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2173                                 split_offset += bpl->tus.f.bdeSize;
2174                         }
2175
2176                         subtotal += bpl->tus.f.bdeSize;
2177
2178                         if (datadir == DMA_TO_DEVICE)
2179                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2180                         else
2181                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2182                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2183
2184                         num_bde++;
2185                         curr_data++;
2186
2187                         if (split_offset)
2188                                 break;
2189
2190                         /* Move to the next s/g segment if possible */
2191                         sgde = sg_next(sgde);
2192
2193                 }
2194
2195                 if (protgroup_offset) {
2196                         /* update the reference tag */
2197                         reftag += protgrp_blks;
2198                         bpl++;
2199                         continue;
2200                 }
2201
2202                 /* are we done ? */
2203                 if (curr_prot == protcnt) {
2204                         alldone = 1;
2205                 } else if (curr_prot < protcnt) {
2206                         /* advance to next prot buffer */
2207                         sgpe = sg_next(sgpe);
2208                         bpl++;
2209
2210                         /* update the reference tag */
2211                         reftag += protgrp_blks;
2212                 } else {
2213                         /* if we're here, we have a bug */
2214                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2215                                 "9054 BLKGRD: bug in %s\n", __func__);
2216                 }
2217
2218         } while (!alldone);
2219 out:
2220
2221         return num_bde;
2222 }
2223
2224 /**
2225  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2226  * @phba: The Hba for which this call is being executed.
2227  * @sc: pointer to scsi command we're working on
2228  * @sgl: pointer to buffer list for protection groups
2229  * @datacnt: number of segments of data that have been dma mapped
2230  *
2231  * This function sets up SGL buffer list for protection groups of
2232  * type LPFC_PG_TYPE_NO_DIF
2233  *
2234  * This is usually used when the HBA is instructed to generate
2235  * DIFs and insert them into data stream (or strip DIF from
2236  * incoming data stream)
2237  *
2238  * The buffer list consists of just one protection group described
2239  * below:
2240  *                                +-------------------------+
2241  *   start of prot group  -->     |         DI_SEED         |
2242  *                                +-------------------------+
2243  *                                |         Data SGE        |
2244  *                                +-------------------------+
2245  *                                |more Data SGE's ... (opt)|
2246  *                                +-------------------------+
2247  *
2248  *
2249  * Note: Data s/g buffers have been dma mapped
2250  *
2251  * Returns the number of SGEs added to the SGL.
2252  **/
2253 static int
2254 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2255                 struct sli4_sge *sgl, int datasegcnt)
2256 {
2257         struct scatterlist *sgde = NULL; /* s/g data entry */
2258         struct sli4_sge_diseed *diseed = NULL;
2259         dma_addr_t physaddr;
2260         int i = 0, num_sge = 0, status;
2261         uint32_t reftag;
2262         uint8_t txop, rxop;
2263 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2264         uint32_t rc;
2265 #endif
2266         uint32_t checking = 1;
2267         uint32_t dma_len;
2268         uint32_t dma_offset = 0;
2269
2270         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2271         if (status)
2272                 goto out;
2273
2274         /* extract some info from the scsi command for pde*/
2275         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2276
2277 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2278         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2279         if (rc) {
2280                 if (rc & BG_ERR_SWAP)
2281                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2282                 if (rc & BG_ERR_CHECK)
2283                         checking = 0;
2284         }
2285 #endif
2286
2287         /* setup DISEED with what we have */
2288         diseed = (struct sli4_sge_diseed *) sgl;
2289         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2290         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2291
2292         /* Endianness conversion if necessary */
2293         diseed->ref_tag = cpu_to_le32(reftag);
2294         diseed->ref_tag_tran = diseed->ref_tag;
2295
2296         /*
2297          * We only need to check the data on READs, for WRITEs
2298          * protection data is automatically generated, not checked.
2299          */
2300         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2301                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2302                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2303                 else
2304                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2305
2306                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2307                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2308                 else
2309                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2310         }
2311
2312         /* setup DISEED with the rest of the info */
2313         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2314         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2315
2316         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2317         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2318
2319         /* Endianness conversion if necessary for DISEED */
2320         diseed->word2 = cpu_to_le32(diseed->word2);
2321         diseed->word3 = cpu_to_le32(diseed->word3);
2322
2323         /* advance bpl and increment sge count */
2324         num_sge++;
2325         sgl++;
2326
2327         /* assumption: caller has already run dma_map_sg on command data */
2328         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2329                 physaddr = sg_dma_address(sgde);
2330                 dma_len = sg_dma_len(sgde);
2331                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2332                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2333                 if ((i + 1) == datasegcnt)
2334                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2335                 else
2336                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2337                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2338                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2339
2340                 sgl->sge_len = cpu_to_le32(dma_len);
2341                 dma_offset += dma_len;
2342
2343                 sgl++;
2344                 num_sge++;
2345         }
2346
2347 out:
2348         return num_sge;
2349 }
2350
2351 /**
2352  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2353  * @phba: The Hba for which this call is being executed.
2354  * @sc: pointer to scsi command we're working on
2355  * @sgl: pointer to buffer list for protection groups
2356  * @datacnt: number of segments of data that have been dma mapped
2357  * @protcnt: number of segment of protection data that have been dma mapped
2358  *
2359  * This function sets up SGL buffer list for protection groups of
2360  * type LPFC_PG_TYPE_DIF
2361  *
2362  * This is usually used when DIFs are in their own buffers,
2363  * separate from the data. The HBA can then by instructed
2364  * to place the DIFs in the outgoing stream.  For read operations,
2365  * The HBA could extract the DIFs and place it in DIF buffers.
2366  *
2367  * The buffer list for this type consists of one or more of the
2368  * protection groups described below:
2369  *                                    +-------------------------+
2370  *   start of first prot group  -->   |         DISEED          |
2371  *                                    +-------------------------+
2372  *                                    |      DIF (Prot SGE)     |
2373  *                                    +-------------------------+
2374  *                                    |        Data SGE         |
2375  *                                    +-------------------------+
2376  *                                    |more Data SGE's ... (opt)|
2377  *                                    +-------------------------+
2378  *   start of new  prot group  -->    |         DISEED          |
2379  *                                    +-------------------------+
2380  *                                    |          ...            |
2381  *                                    +-------------------------+
2382  *
2383  * Note: It is assumed that both data and protection s/g buffers have been
2384  *       mapped for DMA
2385  *
2386  * Returns the number of SGEs added to the SGL.
2387  **/
2388 static int
2389 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2390                 struct sli4_sge *sgl, int datacnt, int protcnt)
2391 {
2392         struct scatterlist *sgde = NULL; /* s/g data entry */
2393         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2394         struct sli4_sge_diseed *diseed = NULL;
2395         dma_addr_t dataphysaddr, protphysaddr;
2396         unsigned short curr_data = 0, curr_prot = 0;
2397         unsigned int split_offset;
2398         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2399         unsigned int protgrp_blks, protgrp_bytes;
2400         unsigned int remainder, subtotal;
2401         int status;
2402         unsigned char pgdone = 0, alldone = 0;
2403         unsigned blksize;
2404         uint32_t reftag;
2405         uint8_t txop, rxop;
2406         uint32_t dma_len;
2407 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2408         uint32_t rc;
2409 #endif
2410         uint32_t checking = 1;
2411         uint32_t dma_offset = 0;
2412         int num_sge = 0;
2413
2414         sgpe = scsi_prot_sglist(sc);
2415         sgde = scsi_sglist(sc);
2416
2417         if (!sgpe || !sgde) {
2418                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2419                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2420                                 sgpe, sgde);
2421                 return 0;
2422         }
2423
2424         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2425         if (status)
2426                 goto out;
2427
2428         /* extract some info from the scsi command */
2429         blksize = lpfc_cmd_blksize(sc);
2430         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2431
2432 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2433         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2434         if (rc) {
2435                 if (rc & BG_ERR_SWAP)
2436                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2437                 if (rc & BG_ERR_CHECK)
2438                         checking = 0;
2439         }
2440 #endif
2441
2442         split_offset = 0;
2443         do {
2444                 /* Check to see if we ran out of space */
2445                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2446                         return num_sge + 3;
2447
2448                 /* setup DISEED with what we have */
2449                 diseed = (struct sli4_sge_diseed *) sgl;
2450                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2451                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2452
2453                 /* Endianness conversion if necessary */
2454                 diseed->ref_tag = cpu_to_le32(reftag);
2455                 diseed->ref_tag_tran = diseed->ref_tag;
2456
2457                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2458                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2459
2460                 } else {
2461                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2462                         /*
2463                          * When in this mode, the hardware will replace
2464                          * the guard tag from the host with a
2465                          * newly generated good CRC for the wire.
2466                          * Switch to raw mode here to avoid this
2467                          * behavior. What the host sends gets put on the wire.
2468                          */
2469                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2470                                 txop = BG_OP_RAW_MODE;
2471                                 rxop = BG_OP_RAW_MODE;
2472                         }
2473                 }
2474
2475
2476                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2477                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2478                 else
2479                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2480
2481                 /* setup DISEED with the rest of the info */
2482                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2483                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2484
2485                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2486                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2487
2488                 /* Endianness conversion if necessary for DISEED */
2489                 diseed->word2 = cpu_to_le32(diseed->word2);
2490                 diseed->word3 = cpu_to_le32(diseed->word3);
2491
2492                 /* advance sgl and increment bde count */
2493                 num_sge++;
2494                 sgl++;
2495
2496                 /* setup the first BDE that points to protection buffer */
2497                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2498                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2499
2500                 /* must be integer multiple of the DIF block length */
2501                 BUG_ON(protgroup_len % 8);
2502
2503                 /* Now setup DIF SGE */
2504                 sgl->word2 = 0;
2505                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2506                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2507                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2508                 sgl->word2 = cpu_to_le32(sgl->word2);
2509
2510                 protgrp_blks = protgroup_len / 8;
2511                 protgrp_bytes = protgrp_blks * blksize;
2512
2513                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2514                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2515                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2516                         protgroup_offset += protgroup_remainder;
2517                         protgrp_blks = protgroup_remainder / 8;
2518                         protgrp_bytes = protgrp_blks * blksize;
2519                 } else {
2520                         protgroup_offset = 0;
2521                         curr_prot++;
2522                 }
2523
2524                 num_sge++;
2525
2526                 /* setup SGE's for data blocks associated with DIF data */
2527                 pgdone = 0;
2528                 subtotal = 0; /* total bytes processed for current prot grp */
2529                 while (!pgdone) {
2530                         /* Check to see if we ran out of space */
2531                         if (num_sge >= phba->cfg_total_seg_cnt)
2532                                 return num_sge + 1;
2533
2534                         if (!sgde) {
2535                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2536                                         "9086 BLKGRD:%s Invalid data segment\n",
2537                                                 __func__);
2538                                 return 0;
2539                         }
2540                         sgl++;
2541                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2542
2543                         remainder = sg_dma_len(sgde) - split_offset;
2544
2545                         if ((subtotal + remainder) <= protgrp_bytes) {
2546                                 /* we can use this whole buffer */
2547                                 dma_len = remainder;
2548                                 split_offset = 0;
2549
2550                                 if ((subtotal + remainder) == protgrp_bytes)
2551                                         pgdone = 1;
2552                         } else {
2553                                 /* must split this buffer with next prot grp */
2554                                 dma_len = protgrp_bytes - subtotal;
2555                                 split_offset += dma_len;
2556                         }
2557
2558                         subtotal += dma_len;
2559
2560                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2561                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2562                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2563                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2564                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2565
2566                         sgl->sge_len = cpu_to_le32(dma_len);
2567                         dma_offset += dma_len;
2568
2569                         num_sge++;
2570                         curr_data++;
2571
2572                         if (split_offset)
2573                                 break;
2574
2575                         /* Move to the next s/g segment if possible */
2576                         sgde = sg_next(sgde);
2577                 }
2578
2579                 if (protgroup_offset) {
2580                         /* update the reference tag */
2581                         reftag += protgrp_blks;
2582                         sgl++;
2583                         continue;
2584                 }
2585
2586                 /* are we done ? */
2587                 if (curr_prot == protcnt) {
2588                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2589                         alldone = 1;
2590                 } else if (curr_prot < protcnt) {
2591                         /* advance to next prot buffer */
2592                         sgpe = sg_next(sgpe);
2593                         sgl++;
2594
2595                         /* update the reference tag */
2596                         reftag += protgrp_blks;
2597                 } else {
2598                         /* if we're here, we have a bug */
2599                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2600                                 "9085 BLKGRD: bug in %s\n", __func__);
2601                 }
2602
2603         } while (!alldone);
2604
2605 out:
2606
2607         return num_sge;
2608 }
2609
2610 /**
2611  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2612  * @phba: The Hba for which this call is being executed.
2613  * @sc: pointer to scsi command we're working on
2614  *
2615  * Given a SCSI command that supports DIF, determine composition of protection
2616  * groups involved in setting up buffer lists
2617  *
2618  * Returns: Protection group type (with or without DIF)
2619  *
2620  **/
2621 static int
2622 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2623 {
2624         int ret = LPFC_PG_TYPE_INVALID;
2625         unsigned char op = scsi_get_prot_op(sc);
2626
2627         switch (op) {
2628         case SCSI_PROT_READ_STRIP:
2629         case SCSI_PROT_WRITE_INSERT:
2630                 ret = LPFC_PG_TYPE_NO_DIF;
2631                 break;
2632         case SCSI_PROT_READ_INSERT:
2633         case SCSI_PROT_WRITE_STRIP:
2634         case SCSI_PROT_READ_PASS:
2635         case SCSI_PROT_WRITE_PASS:
2636                 ret = LPFC_PG_TYPE_DIF_BUF;
2637                 break;
2638         default:
2639                 if (phba)
2640                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2641                                         "9021 Unsupported protection op:%d\n",
2642                                         op);
2643                 break;
2644         }
2645         return ret;
2646 }
2647
2648 /**
2649  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2650  * @phba: The Hba for which this call is being executed.
2651  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2652  *
2653  * Adjust the data length to account for how much data
2654  * is actually on the wire.
2655  *
2656  * returns the adjusted data length
2657  **/
2658 static int
2659 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2660                        struct lpfc_scsi_buf *lpfc_cmd)
2661 {
2662         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2663         int fcpdl;
2664
2665         fcpdl = scsi_bufflen(sc);
2666
2667         /* Check if there is protection data on the wire */
2668         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2669                 /* Read check for protection data */
2670                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2671                         return fcpdl;
2672
2673         } else {
2674                 /* Write check for protection data */
2675                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2676                         return fcpdl;
2677         }
2678
2679         /*
2680          * If we are in DIF Type 1 mode every data block has a 8 byte
2681          * DIF (trailer) attached to it. Must ajust FCP data length
2682          * to account for the protection data.
2683          */
2684         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2685
2686         return fcpdl;
2687 }
2688
2689 /**
2690  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2691  * @phba: The Hba for which this call is being executed.
2692  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2693  *
2694  * This is the protection/DIF aware version of
2695  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2696  * two functions eventually, but for now, it's here
2697  **/
2698 static int
2699 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2700                 struct lpfc_scsi_buf *lpfc_cmd)
2701 {
2702         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2703         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2704         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2705         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2706         uint32_t num_bde = 0;
2707         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2708         int prot_group_type = 0;
2709         int fcpdl;
2710
2711         /*
2712          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2713          *  fcp_rsp regions to the first data bde entry
2714          */
2715         bpl += 2;
2716         if (scsi_sg_count(scsi_cmnd)) {
2717                 /*
2718                  * The driver stores the segment count returned from pci_map_sg
2719                  * because this a count of dma-mappings used to map the use_sg
2720                  * pages.  They are not guaranteed to be the same for those
2721                  * architectures that implement an IOMMU.
2722                  */
2723                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2724                                         scsi_sglist(scsi_cmnd),
2725                                         scsi_sg_count(scsi_cmnd), datadir);
2726                 if (unlikely(!datasegcnt))
2727                         return 1;
2728
2729                 lpfc_cmd->seg_cnt = datasegcnt;
2730
2731                 /* First check if data segment count from SCSI Layer is good */
2732                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2733                         goto err;
2734
2735                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2736
2737                 switch (prot_group_type) {
2738                 case LPFC_PG_TYPE_NO_DIF:
2739
2740                         /* Here we need to add a PDE5 and PDE6 to the count */
2741                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2742                                 goto err;
2743
2744                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2745                                         datasegcnt);
2746                         /* we should have 2 or more entries in buffer list */
2747                         if (num_bde < 2)
2748                                 goto err;
2749                         break;
2750
2751                 case LPFC_PG_TYPE_DIF_BUF:
2752                         /*
2753                          * This type indicates that protection buffers are
2754                          * passed to the driver, so that needs to be prepared
2755                          * for DMA
2756                          */
2757                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2758                                         scsi_prot_sglist(scsi_cmnd),
2759                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2760                         if (unlikely(!protsegcnt)) {
2761                                 scsi_dma_unmap(scsi_cmnd);
2762                                 return 1;
2763                         }
2764
2765                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2766
2767                         /*
2768                          * There is a minimun of 4 BPLs used for every
2769                          * protection data segment.
2770                          */
2771                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2772                             (phba->cfg_total_seg_cnt - 2))
2773                                 goto err;
2774
2775                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2776                                         datasegcnt, protsegcnt);
2777                         /* we should have 3 or more entries in buffer list */
2778                         if ((num_bde < 3) ||
2779                             (num_bde > phba->cfg_total_seg_cnt))
2780                                 goto err;
2781                         break;
2782
2783                 case LPFC_PG_TYPE_INVALID:
2784                 default:
2785                         scsi_dma_unmap(scsi_cmnd);
2786                         lpfc_cmd->seg_cnt = 0;
2787
2788                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2789                                         "9022 Unexpected protection group %i\n",
2790                                         prot_group_type);
2791                         return 1;
2792                 }
2793         }
2794
2795         /*
2796          * Finish initializing those IOCB fields that are dependent on the
2797          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2798          * reinitialized since all iocb memory resources are used many times
2799          * for transmit, receive, and continuation bpl's.
2800          */
2801         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2802         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2803         iocb_cmd->ulpBdeCount = 1;
2804         iocb_cmd->ulpLe = 1;
2805
2806         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2807         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2808
2809         /*
2810          * Due to difference in data length between DIF/non-DIF paths,
2811          * we need to set word 4 of IOCB here
2812          */
2813         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2814
2815         return 0;
2816 err:
2817         if (lpfc_cmd->seg_cnt)
2818                 scsi_dma_unmap(scsi_cmnd);
2819         if (lpfc_cmd->prot_seg_cnt)
2820                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2821                              scsi_prot_sg_count(scsi_cmnd),
2822                              scsi_cmnd->sc_data_direction);
2823
2824         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2825                         "9023 Cannot setup S/G List for HBA"
2826                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2827                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2828                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2829                         prot_group_type, num_bde);
2830
2831         lpfc_cmd->seg_cnt = 0;
2832         lpfc_cmd->prot_seg_cnt = 0;
2833         return 1;
2834 }
2835
2836 /*
2837  * This function calcuates the T10 DIF guard tag
2838  * on the specified data using a CRC algorithmn
2839  * using crc_t10dif.
2840  */
2841 static uint16_t
2842 lpfc_bg_crc(uint8_t *data, int count)
2843 {
2844         uint16_t crc = 0;
2845         uint16_t x;
2846
2847         crc = crc_t10dif(data, count);
2848         x = cpu_to_be16(crc);
2849         return x;
2850 }
2851
2852 /*
2853  * This function calcuates the T10 DIF guard tag
2854  * on the specified data using a CSUM algorithmn
2855  * using ip_compute_csum.
2856  */
2857 static uint16_t
2858 lpfc_bg_csum(uint8_t *data, int count)
2859 {
2860         uint16_t ret;
2861
2862         ret = ip_compute_csum(data, count);
2863         return ret;
2864 }
2865
2866 /*
2867  * This function examines the protection data to try to determine
2868  * what type of T10-DIF error occurred.
2869  */
2870 static void
2871 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2872 {
2873         struct scatterlist *sgpe; /* s/g prot entry */
2874         struct scatterlist *sgde; /* s/g data entry */
2875         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2876         struct scsi_dif_tuple *src = NULL;
2877         uint8_t *data_src = NULL;
2878         uint16_t guard_tag;
2879         uint16_t start_app_tag, app_tag;
2880         uint32_t start_ref_tag, ref_tag;
2881         int prot, protsegcnt;
2882         int err_type, len, data_len;
2883         int chk_ref, chk_app, chk_guard;
2884         uint16_t sum;
2885         unsigned blksize;
2886
2887         err_type = BGS_GUARD_ERR_MASK;
2888         sum = 0;
2889         guard_tag = 0;
2890
2891         /* First check to see if there is protection data to examine */
2892         prot = scsi_get_prot_op(cmd);
2893         if ((prot == SCSI_PROT_READ_STRIP) ||
2894             (prot == SCSI_PROT_WRITE_INSERT) ||
2895             (prot == SCSI_PROT_NORMAL))
2896                 goto out;
2897
2898         /* Currently the driver just supports ref_tag and guard_tag checking */
2899         chk_ref = 1;
2900         chk_app = 0;
2901         chk_guard = 0;
2902
2903         /* Setup a ptr to the protection data provided by the SCSI host */
2904         sgpe = scsi_prot_sglist(cmd);
2905         protsegcnt = lpfc_cmd->prot_seg_cnt;
2906
2907         if (sgpe && protsegcnt) {
2908
2909                 /*
2910                  * We will only try to verify guard tag if the segment
2911                  * data length is a multiple of the blksize.
2912                  */
2913                 sgde = scsi_sglist(cmd);
2914                 blksize = lpfc_cmd_blksize(cmd);
2915                 data_src = (uint8_t *)sg_virt(sgde);
2916                 data_len = sgde->length;
2917                 if ((data_len & (blksize - 1)) == 0)
2918                         chk_guard = 1;
2919
2920                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2921                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2922                 start_app_tag = src->app_tag;
2923                 len = sgpe->length;
2924                 while (src && protsegcnt) {
2925                         while (len) {
2926
2927                                 /*
2928                                  * First check to see if a protection data
2929                                  * check is valid
2930                                  */
2931                                 if ((src->ref_tag == 0xffffffff) ||
2932                                     (src->app_tag == 0xffff)) {
2933                                         start_ref_tag++;
2934                                         goto skipit;
2935                                 }
2936
2937                                 /* First Guard Tag checking */
2938                                 if (chk_guard) {
2939                                         guard_tag = src->guard_tag;
2940                                         if (lpfc_cmd_guard_csum(cmd))
2941                                                 sum = lpfc_bg_csum(data_src,
2942                                                                    blksize);
2943                                         else
2944                                                 sum = lpfc_bg_crc(data_src,
2945                                                                   blksize);
2946                                         if ((guard_tag != sum)) {
2947                                                 err_type = BGS_GUARD_ERR_MASK;
2948                                                 goto out;
2949                                         }
2950                                 }
2951
2952                                 /* Reference Tag checking */
2953                                 ref_tag = be32_to_cpu(src->ref_tag);
2954                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2955                                         err_type = BGS_REFTAG_ERR_MASK;
2956                                         goto out;
2957                                 }
2958                                 start_ref_tag++;
2959
2960                                 /* App Tag checking */
2961                                 app_tag = src->app_tag;
2962                                 if (chk_app && (app_tag != start_app_tag)) {
2963                                         err_type = BGS_APPTAG_ERR_MASK;
2964                                         goto out;
2965                                 }
2966 skipit:
2967                                 len -= sizeof(struct scsi_dif_tuple);
2968                                 if (len < 0)
2969                                         len = 0;
2970                                 src++;
2971
2972                                 data_src += blksize;
2973                                 data_len -= blksize;
2974
2975                                 /*
2976                                  * Are we at the end of the Data segment?
2977                                  * The data segment is only used for Guard
2978                                  * tag checking.
2979                                  */
2980                                 if (chk_guard && (data_len == 0)) {
2981                                         chk_guard = 0;
2982                                         sgde = sg_next(sgde);
2983                                         if (!sgde)
2984                                                 goto out;
2985
2986                                         data_src = (uint8_t *)sg_virt(sgde);
2987                                         data_len = sgde->length;
2988                                         if ((data_len & (blksize - 1)) == 0)
2989                                                 chk_guard = 1;
2990                                 }
2991                         }
2992
2993                         /* Goto the next Protection data segment */
2994                         sgpe = sg_next(sgpe);
2995                         if (sgpe) {
2996                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2997                                 len = sgpe->length;
2998                         } else {
2999                                 src = NULL;
3000                         }
3001                         protsegcnt--;
3002                 }
3003         }
3004 out:
3005         if (err_type == BGS_GUARD_ERR_MASK) {
3006                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3007                                         0x10, 0x1);
3008                 cmd->result = DRIVER_SENSE << 24
3009                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3010                 phba->bg_guard_err_cnt++;
3011                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3012                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3013                                 (unsigned long)scsi_get_lba(cmd),
3014                                 sum, guard_tag);
3015
3016         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3017                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3018                                         0x10, 0x3);
3019                 cmd->result = DRIVER_SENSE << 24
3020                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3021
3022                 phba->bg_reftag_err_cnt++;
3023                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3024                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3025                                 (unsigned long)scsi_get_lba(cmd),
3026                                 ref_tag, start_ref_tag);
3027
3028         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3029                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3030                                         0x10, 0x2);
3031                 cmd->result = DRIVER_SENSE << 24
3032                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3033
3034                 phba->bg_apptag_err_cnt++;
3035                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3036                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3037                                 (unsigned long)scsi_get_lba(cmd),
3038                                 app_tag, start_app_tag);
3039         }
3040 }
3041
3042
3043 /*
3044  * This function checks for BlockGuard errors detected by
3045  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3046  * sense buffer will be set accordingly, paired with
3047  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3048  * detected corruption.
3049  *
3050  * Returns:
3051  *  0 - No error found
3052  *  1 - BlockGuard error found
3053  * -1 - Internal error (bad profile, ...etc)
3054  */
3055 static int
3056 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3057                         struct lpfc_iocbq *pIocbOut)
3058 {
3059         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3060         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3061         int ret = 0;
3062         uint32_t bghm = bgf->bghm;
3063         uint32_t bgstat = bgf->bgstat;
3064         uint64_t failing_sector = 0;
3065
3066         spin_lock(&_dump_buf_lock);
3067         if (!_dump_buf_done) {
3068                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3069                         " Data for %u blocks to debugfs\n",
3070                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3071                 lpfc_debug_save_data(phba, cmd);
3072
3073                 /* If we have a prot sgl, save the DIF buffer */
3074                 if (lpfc_prot_group_type(phba, cmd) ==
3075                                 LPFC_PG_TYPE_DIF_BUF) {
3076                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3077                                 "Saving DIF for %u blocks to debugfs\n",
3078                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3079                         lpfc_debug_save_dif(phba, cmd);
3080                 }
3081
3082                 _dump_buf_done = 1;
3083         }
3084         spin_unlock(&_dump_buf_lock);
3085
3086         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3087                 cmd->result = ScsiResult(DID_ERROR, 0);
3088                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3089                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3090                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3091                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3092                                 (unsigned long long)scsi_get_lba(cmd),
3093                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3094                 ret = (-1);
3095                 goto out;
3096         }
3097
3098         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3099                 cmd->result = ScsiResult(DID_ERROR, 0);
3100                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3101                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3102                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3103                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3104                                 (unsigned long long)scsi_get_lba(cmd),
3105                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3106                 ret = (-1);
3107                 goto out;
3108         }
3109
3110         if (lpfc_bgs_get_guard_err(bgstat)) {
3111                 ret = 1;
3112
3113                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3114                                 0x10, 0x1);
3115                 cmd->result = DRIVER_SENSE << 24
3116                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3117                 phba->bg_guard_err_cnt++;
3118                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3119                                 "9055 BLKGRD: Guard Tag error in cmd"
3120                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3121                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3122                                 (unsigned long long)scsi_get_lba(cmd),
3123                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3124         }
3125
3126         if (lpfc_bgs_get_reftag_err(bgstat)) {
3127                 ret = 1;
3128
3129                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3130                                 0x10, 0x3);
3131                 cmd->result = DRIVER_SENSE << 24
3132                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3133
3134                 phba->bg_reftag_err_cnt++;
3135                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3136                                 "9056 BLKGRD: Ref Tag error in cmd"
3137                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3138                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3139                                 (unsigned long long)scsi_get_lba(cmd),
3140                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3141         }
3142
3143         if (lpfc_bgs_get_apptag_err(bgstat)) {
3144                 ret = 1;
3145
3146                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3147                                 0x10, 0x2);
3148                 cmd->result = DRIVER_SENSE << 24
3149                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3150
3151                 phba->bg_apptag_err_cnt++;
3152                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3153                                 "9061 BLKGRD: App Tag error in cmd"
3154                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3155                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3156                                 (unsigned long long)scsi_get_lba(cmd),
3157                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3158         }
3159
3160         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3161                 /*
3162                  * setup sense data descriptor 0 per SPC-4 as an information
3163                  * field, and put the failing LBA in it.
3164                  * This code assumes there was also a guard/app/ref tag error
3165                  * indication.
3166                  */
3167                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3168                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3169                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3170                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3171
3172                 /* bghm is a "on the wire" FC frame based count */
3173                 switch (scsi_get_prot_op(cmd)) {
3174                 case SCSI_PROT_READ_INSERT:
3175                 case SCSI_PROT_WRITE_STRIP:
3176                         bghm /= cmd->device->sector_size;
3177                         break;
3178                 case SCSI_PROT_READ_STRIP:
3179                 case SCSI_PROT_WRITE_INSERT:
3180                 case SCSI_PROT_READ_PASS:
3181                 case SCSI_PROT_WRITE_PASS:
3182                         bghm /= (cmd->device->sector_size +
3183                                 sizeof(struct scsi_dif_tuple));
3184                         break;
3185                 }
3186
3187                 failing_sector = scsi_get_lba(cmd);
3188                 failing_sector += bghm;
3189
3190                 /* Descriptor Information */
3191                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3192         }
3193
3194         if (!ret) {
3195                 /* No error was reported - problem in FW? */
3196                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3197                                 "9057 BLKGRD: Unknown error in cmd"
3198                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3199                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3200                                 (unsigned long long)scsi_get_lba(cmd),
3201                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3202
3203                 /* Calcuate what type of error it was */
3204                 lpfc_calc_bg_err(phba, lpfc_cmd);
3205         }
3206 out:
3207         return ret;
3208 }
3209
3210 /**
3211  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3212  * @phba: The Hba for which this call is being executed.
3213  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3214  *
3215  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3216  * field of @lpfc_cmd for device with SLI-4 interface spec.
3217  *
3218  * Return codes:
3219  *      1 - Error
3220  *      0 - Success
3221  **/
3222 static int
3223 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3224 {
3225         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3226         struct scatterlist *sgel = NULL;
3227         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3228         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3229         struct sli4_sge *first_data_sgl;
3230         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3231         dma_addr_t physaddr;
3232         uint32_t num_bde = 0;
3233         uint32_t dma_len;
3234         uint32_t dma_offset = 0;
3235         int nseg;
3236         struct ulp_bde64 *bde;
3237
3238         /*
3239          * There are three possibilities here - use scatter-gather segment, use
3240          * the single mapping, or neither.  Start the lpfc command prep by
3241          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3242          * data bde entry.
3243          */
3244         if (scsi_sg_count(scsi_cmnd)) {
3245                 /*
3246                  * The driver stores the segment count returned from pci_map_sg
3247                  * because this a count of dma-mappings used to map the use_sg
3248                  * pages.  They are not guaranteed to be the same for those
3249                  * architectures that implement an IOMMU.
3250                  */
3251
3252                 nseg = scsi_dma_map(scsi_cmnd);
3253                 if (unlikely(nseg <= 0))
3254                         return 1;
3255                 sgl += 1;
3256                 /* clear the last flag in the fcp_rsp map entry */
3257                 sgl->word2 = le32_to_cpu(sgl->word2);
3258                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3259                 sgl->word2 = cpu_to_le32(sgl->word2);
3260                 sgl += 1;
3261                 first_data_sgl = sgl;
3262                 lpfc_cmd->seg_cnt = nseg;
3263                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3264                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3265                                 " %s: Too many sg segments from "
3266                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3267                                 __func__, phba->cfg_sg_seg_cnt,
3268                                lpfc_cmd->seg_cnt);
3269                         lpfc_cmd->seg_cnt = 0;
3270                         scsi_dma_unmap(scsi_cmnd);
3271                         return 1;
3272                 }
3273
3274                 /*
3275                  * The driver established a maximum scatter-gather segment count
3276                  * during probe that limits the number of sg elements in any
3277                  * single scsi command.  Just run through the seg_cnt and format
3278                  * the sge's.
3279                  * When using SLI-3 the driver will try to fit all the BDEs into
3280                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3281                  * does for SLI-2 mode.
3282                  */
3283                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3284                         physaddr = sg_dma_address(sgel);
3285                         dma_len = sg_dma_len(sgel);
3286                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3287                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3288                         sgl->word2 = le32_to_cpu(sgl->word2);
3289                         if ((num_bde + 1) == nseg)
3290                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3291                         else
3292                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3293                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3294                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3295                         sgl->word2 = cpu_to_le32(sgl->word2);
3296                         sgl->sge_len = cpu_to_le32(dma_len);
3297                         dma_offset += dma_len;
3298                         sgl++;
3299                 }
3300                 /* setup the performance hint (first data BDE) if enabled */
3301                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3302                         bde = (struct ulp_bde64 *)
3303                                         &(iocb_cmd->unsli3.sli3Words[5]);
3304                         bde->addrLow = first_data_sgl->addr_lo;
3305                         bde->addrHigh = first_data_sgl->addr_hi;
3306                         bde->tus.f.bdeSize =
3307                                         le32_to_cpu(first_data_sgl->sge_len);
3308                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3309                         bde->tus.w = cpu_to_le32(bde->tus.w);
3310                 }
3311         } else {
3312                 sgl += 1;
3313                 /* clear the last flag in the fcp_rsp map entry */
3314                 sgl->word2 = le32_to_cpu(sgl->word2);
3315                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3316                 sgl->word2 = cpu_to_le32(sgl->word2);
3317         }
3318
3319         /*
3320          * Finish initializing those IOCB fields that are dependent on the
3321          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3322          * explicitly reinitialized.
3323          * all iocb memory resources are reused.
3324          */
3325         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3326
3327         /*
3328          * Due to difference in data length between DIF/non-DIF paths,
3329          * we need to set word 4 of IOCB here
3330          */
3331         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3332
3333         /*
3334          * If the OAS driver feature is enabled and the lun is enabled for
3335          * OAS, set the oas iocb related flags.
3336          */
3337         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3338                 scsi_cmnd->device->hostdata)->oas_enabled)
3339                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3340         return 0;
3341 }
3342
3343 /**
3344  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3345  * @phba: The Hba for which this call is being executed.
3346  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3347  *
3348  * This is the protection/DIF aware version of
3349  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3350  * two functions eventually, but for now, it's here
3351  **/
3352 static int
3353 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3354                 struct lpfc_scsi_buf *lpfc_cmd)
3355 {
3356         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3357         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3358         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3359         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3360         uint32_t num_sge = 0;
3361         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3362         int prot_group_type = 0;
3363         int fcpdl;
3364
3365         /*
3366          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3367          *  fcp_rsp regions to the first data sge entry
3368          */
3369         if (scsi_sg_count(scsi_cmnd)) {
3370                 /*
3371                  * The driver stores the segment count returned from pci_map_sg
3372                  * because this a count of dma-mappings used to map the use_sg
3373                  * pages.  They are not guaranteed to be the same for those
3374                  * architectures that implement an IOMMU.
3375                  */
3376                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3377                                         scsi_sglist(scsi_cmnd),
3378                                         scsi_sg_count(scsi_cmnd), datadir);
3379                 if (unlikely(!datasegcnt))
3380                         return 1;
3381
3382                 sgl += 1;
3383                 /* clear the last flag in the fcp_rsp map entry */
3384                 sgl->word2 = le32_to_cpu(sgl->word2);
3385                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3386                 sgl->word2 = cpu_to_le32(sgl->word2);
3387
3388                 sgl += 1;
3389                 lpfc_cmd->seg_cnt = datasegcnt;
3390
3391                 /* First check if data segment count from SCSI Layer is good */
3392                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3393                         goto err;
3394
3395                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3396
3397                 switch (prot_group_type) {
3398                 case LPFC_PG_TYPE_NO_DIF:
3399                         /* Here we need to add a DISEED to the count */
3400                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3401                                 goto err;
3402
3403                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3404                                         datasegcnt);
3405
3406                         /* we should have 2 or more entries in buffer list */
3407                         if (num_sge < 2)
3408                                 goto err;
3409                         break;
3410
3411                 case LPFC_PG_TYPE_DIF_BUF:
3412                         /*
3413                          * This type indicates that protection buffers are
3414                          * passed to the driver, so that needs to be prepared
3415                          * for DMA
3416                          */
3417                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3418                                         scsi_prot_sglist(scsi_cmnd),
3419                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3420                         if (unlikely(!protsegcnt)) {
3421                                 scsi_dma_unmap(scsi_cmnd);
3422                                 return 1;
3423                         }
3424
3425                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3426                         /*
3427                          * There is a minimun of 3 SGEs used for every
3428                          * protection data segment.
3429                          */
3430                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3431                             (phba->cfg_total_seg_cnt - 2))
3432                                 goto err;
3433
3434                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3435                                         datasegcnt, protsegcnt);
3436
3437                         /* we should have 3 or more entries in buffer list */
3438                         if ((num_sge < 3) ||
3439                             (num_sge > phba->cfg_total_seg_cnt))
3440                                 goto err;
3441                         break;
3442
3443                 case LPFC_PG_TYPE_INVALID:
3444                 default:
3445                         scsi_dma_unmap(scsi_cmnd);
3446                         lpfc_cmd->seg_cnt = 0;
3447
3448                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3449                                         "9083 Unexpected protection group %i\n",
3450                                         prot_group_type);
3451                         return 1;
3452                 }
3453         }
3454
3455         switch (scsi_get_prot_op(scsi_cmnd)) {
3456         case SCSI_PROT_WRITE_STRIP:
3457         case SCSI_PROT_READ_STRIP:
3458                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3459                 break;
3460         case SCSI_PROT_WRITE_INSERT:
3461         case SCSI_PROT_READ_INSERT:
3462                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3463                 break;
3464         case SCSI_PROT_WRITE_PASS:
3465         case SCSI_PROT_READ_PASS:
3466                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3467                 break;
3468         }
3469
3470         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3471         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3472
3473         /*
3474          * Due to difference in data length between DIF/non-DIF paths,
3475          * we need to set word 4 of IOCB here
3476          */
3477         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3478
3479         /*
3480          * If the OAS driver feature is enabled and the lun is enabled for
3481          * OAS, set the oas iocb related flags.
3482          */
3483         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3484                 scsi_cmnd->device->hostdata)->oas_enabled)
3485                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3486
3487         return 0;
3488 err:
3489         if (lpfc_cmd->seg_cnt)
3490                 scsi_dma_unmap(scsi_cmnd);
3491         if (lpfc_cmd->prot_seg_cnt)
3492                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3493                              scsi_prot_sg_count(scsi_cmnd),
3494                              scsi_cmnd->sc_data_direction);
3495
3496         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3497                         "9084 Cannot setup S/G List for HBA"
3498                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3499                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3500                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3501                         prot_group_type, num_sge);
3502
3503         lpfc_cmd->seg_cnt = 0;
3504         lpfc_cmd->prot_seg_cnt = 0;
3505         return 1;
3506 }
3507
3508 /**
3509  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3510  * @phba: The Hba for which this call is being executed.
3511  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3512  *
3513  * This routine wraps the actual DMA mapping function pointer from the
3514  * lpfc_hba struct.
3515  *
3516  * Return codes:
3517  *      1 - Error
3518  *      0 - Success
3519  **/
3520 static inline int
3521 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3522 {
3523         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3524 }
3525
3526 /**
3527  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3528  * using BlockGuard.
3529  * @phba: The Hba for which this call is being executed.
3530  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3531  *
3532  * This routine wraps the actual DMA mapping function pointer from the
3533  * lpfc_hba struct.
3534  *
3535  * Return codes:
3536  *      1 - Error
3537  *      0 - Success
3538  **/
3539 static inline int
3540 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3541 {
3542         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3543 }
3544
3545 /**
3546  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3547  * @phba: Pointer to hba context object.
3548  * @vport: Pointer to vport object.
3549  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3550  * @rsp_iocb: Pointer to response iocb object which reported error.
3551  *
3552  * This function posts an event when there is a SCSI command reporting
3553  * error from the scsi device.
3554  **/
3555 static void
3556 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3557                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3558         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3559         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3560         uint32_t resp_info = fcprsp->rspStatus2;
3561         uint32_t scsi_status = fcprsp->rspStatus3;
3562         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3563         struct lpfc_fast_path_event *fast_path_evt = NULL;
3564         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3565         unsigned long flags;
3566
3567         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3568                 return;
3569
3570         /* If there is queuefull or busy condition send a scsi event */
3571         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3572                 (cmnd->result == SAM_STAT_BUSY)) {
3573                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3574                 if (!fast_path_evt)
3575                         return;
3576                 fast_path_evt->un.scsi_evt.event_type =
3577                         FC_REG_SCSI_EVENT;
3578                 fast_path_evt->un.scsi_evt.subcategory =
3579                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3580                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3581                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3582                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3583                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3584                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3585                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3586         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3587                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3588                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3589                 if (!fast_path_evt)
3590                         return;
3591                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3592                         FC_REG_SCSI_EVENT;
3593                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3594                         LPFC_EVENT_CHECK_COND;
3595                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3596                         cmnd->device->lun;
3597                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3598                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3599                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3600                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3601                 fast_path_evt->un.check_cond_evt.sense_key =
3602                         cmnd->sense_buffer[2] & 0xf;
3603                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3604                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3605         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3606                      fcpi_parm &&
3607                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3608                         ((scsi_status == SAM_STAT_GOOD) &&
3609                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3610                 /*
3611                  * If status is good or resid does not match with fcp_param and
3612                  * there is valid fcpi_parm, then there is a read_check error
3613                  */
3614                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3615                 if (!fast_path_evt)
3616                         return;
3617                 fast_path_evt->un.read_check_error.header.event_type =
3618                         FC_REG_FABRIC_EVENT;
3619                 fast_path_evt->un.read_check_error.header.subcategory =
3620                         LPFC_EVENT_FCPRDCHKERR;
3621                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3622                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3623                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3624                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3625                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3626                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3627                 fast_path_evt->un.read_check_error.fcpiparam =
3628                         fcpi_parm;
3629         } else
3630                 return;
3631
3632         fast_path_evt->vport = vport;
3633         spin_lock_irqsave(&phba->hbalock, flags);
3634         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3635         spin_unlock_irqrestore(&phba->hbalock, flags);
3636         lpfc_worker_wake_up(phba);
3637         return;
3638 }
3639
3640 /**
3641  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3642  * @phba: The HBA for which this call is being executed.
3643  * @psb: The scsi buffer which is going to be un-mapped.
3644  *
3645  * This routine does DMA un-mapping of scatter gather list of scsi command
3646  * field of @lpfc_cmd for device with SLI-3 interface spec.
3647  **/
3648 static void
3649 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3650 {
3651         /*
3652          * There are only two special cases to consider.  (1) the scsi command
3653          * requested scatter-gather usage or (2) the scsi command allocated
3654          * a request buffer, but did not request use_sg.  There is a third
3655          * case, but it does not require resource deallocation.
3656          */
3657         if (psb->seg_cnt > 0)
3658                 scsi_dma_unmap(psb->pCmd);
3659         if (psb->prot_seg_cnt > 0)
3660                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3661                                 scsi_prot_sg_count(psb->pCmd),
3662                                 psb->pCmd->sc_data_direction);
3663 }
3664
3665 /**
3666  * lpfc_handler_fcp_err - FCP response handler
3667  * @vport: The virtual port for which this call is being executed.
3668  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3669  * @rsp_iocb: The response IOCB which contains FCP error.
3670  *
3671  * This routine is called to process response IOCB with status field
3672  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3673  * based upon SCSI and FCP error.
3674  **/
3675 static void
3676 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3677                     struct lpfc_iocbq *rsp_iocb)
3678 {
3679         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3680         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3681         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3682         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3683         uint32_t resp_info = fcprsp->rspStatus2;
3684         uint32_t scsi_status = fcprsp->rspStatus3;
3685         uint32_t *lp;
3686         uint32_t host_status = DID_OK;
3687         uint32_t rsplen = 0;
3688         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3689
3690
3691         /*
3692          *  If this is a task management command, there is no
3693          *  scsi packet associated with this lpfc_cmd.  The driver
3694          *  consumes it.
3695          */
3696         if (fcpcmd->fcpCntl2) {
3697                 scsi_status = 0;
3698                 goto out;
3699         }
3700
3701         if (resp_info & RSP_LEN_VALID) {
3702                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3703                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3704                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3705                                  "2719 Invalid response length: "
3706                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3707                                  cmnd->device->id,
3708                                  cmnd->device->lun, cmnd->cmnd[0],
3709                                  rsplen);
3710                         host_status = DID_ERROR;
3711                         goto out;
3712                 }
3713                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3714                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3715                                  "2757 Protocol failure detected during "
3716                                  "processing of FCP I/O op: "
3717                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3718                                  cmnd->device->id,
3719                                  cmnd->device->lun, cmnd->cmnd[0],
3720                                  fcprsp->rspInfo3);
3721                         host_status = DID_ERROR;
3722                         goto out;
3723                 }
3724         }
3725
3726         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3727                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3728                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3729                         snslen = SCSI_SENSE_BUFFERSIZE;
3730
3731                 if (resp_info & RSP_LEN_VALID)
3732                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3733                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3734         }
3735         lp = (uint32_t *)cmnd->sense_buffer;
3736
3737         /* special handling for under run conditions */
3738         if (!scsi_status && (resp_info & RESID_UNDER)) {
3739                 /* don't log under runs if fcp set... */
3740                 if (vport->cfg_log_verbose & LOG_FCP)
3741                         logit = LOG_FCP_ERROR;
3742                 /* unless operator says so */
3743                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3744                         logit = LOG_FCP_UNDER;
3745         }
3746
3747         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3748                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3749                          "Data: x%x x%x x%x x%x x%x\n",
3750                          cmnd->cmnd[0], scsi_status,
3751                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3752                          be32_to_cpu(fcprsp->rspResId),
3753                          be32_to_cpu(fcprsp->rspSnsLen),
3754                          be32_to_cpu(fcprsp->rspRspLen),
3755                          fcprsp->rspInfo3);
3756
3757         scsi_set_resid(cmnd, 0);
3758         if (resp_info & RESID_UNDER) {
3759                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3760
3761                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3762                                  "9025 FCP Read Underrun, expected %d, "
3763                                  "residual %d Data: x%x x%x x%x\n",
3764                                  be32_to_cpu(fcpcmd->fcpDl),
3765                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3766                                  cmnd->underflow);
3767
3768                 /*
3769                  * If there is an under run check if under run reported by
3770                  * storage array is same as the under run reported by HBA.
3771                  * If this is not same, there is a dropped frame.
3772                  */
3773                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3774                         fcpi_parm &&
3775                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3776                         lpfc_printf_vlog(vport, KERN_WARNING,
3777                                          LOG_FCP | LOG_FCP_ERROR,
3778                                          "9026 FCP Read Check Error "
3779                                          "and Underrun Data: x%x x%x x%x x%x\n",
3780                                          be32_to_cpu(fcpcmd->fcpDl),
3781                                          scsi_get_resid(cmnd), fcpi_parm,
3782                                          cmnd->cmnd[0]);
3783                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3784                         host_status = DID_ERROR;
3785                 }
3786                 /*
3787                  * The cmnd->underflow is the minimum number of bytes that must
3788                  * be transferred for this command.  Provided a sense condition
3789                  * is not present, make sure the actual amount transferred is at
3790                  * least the underflow value or fail.
3791                  */
3792                 if (!(resp_info & SNS_LEN_VALID) &&
3793                     (scsi_status == SAM_STAT_GOOD) &&
3794                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3795                      < cmnd->underflow)) {
3796                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3797                                          "9027 FCP command x%x residual "
3798                                          "underrun converted to error "
3799                                          "Data: x%x x%x x%x\n",
3800                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3801                                          scsi_get_resid(cmnd), cmnd->underflow);
3802                         host_status = DID_ERROR;
3803                 }
3804         } else if (resp_info & RESID_OVER) {
3805                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3806                                  "9028 FCP command x%x residual overrun error. "
3807                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3808                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3809                 host_status = DID_ERROR;
3810
3811         /*
3812          * Check SLI validation that all the transfer was actually done
3813          * (fcpi_parm should be zero). Apply check only to reads.
3814          */
3815         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
3816                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3817                                  "9029 FCP Read Check Error Data: "
3818                                  "x%x x%x x%x x%x x%x\n",
3819                                  be32_to_cpu(fcpcmd->fcpDl),
3820                                  be32_to_cpu(fcprsp->rspResId),
3821                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3822                 switch (scsi_status) {
3823                 case SAM_STAT_GOOD:
3824                 case SAM_STAT_CHECK_CONDITION:
3825                         /* Fabric dropped a data frame. Fail any successful
3826                          * command in which we detected dropped frames.
3827                          * A status of good or some check conditions could
3828                          * be considered a successful command.
3829                          */
3830                         host_status = DID_ERROR;
3831                         break;
3832                 }
3833                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3834         }
3835
3836  out:
3837         cmnd->result = ScsiResult(host_status, scsi_status);
3838         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3839 }
3840
3841 /**
3842  * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
3843  * @phba: Pointer to HBA context object.
3844  *
3845  * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
3846  * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
3847  * held.
3848  * If scsi-mq is enabled, get the default block layer mapping of software queues
3849  * to hardware queues. This information is saved in request tag.
3850  *
3851  * Return: index into SLI4 fast-path FCP queue index.
3852  **/
3853 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
3854                                   struct lpfc_scsi_buf *lpfc_cmd)
3855 {
3856         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3857         struct lpfc_vector_map_info *cpup;
3858         int chann, cpu;
3859         uint32_t tag;
3860         uint16_t hwq;
3861
3862         if (cmnd && shost_use_blk_mq(cmnd->device->host)) {
3863                 tag = blk_mq_unique_tag(cmnd->request);
3864                 hwq = blk_mq_unique_tag_to_hwq(tag);
3865
3866                 return hwq;
3867         }
3868
3869         if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
3870             && phba->cfg_fcp_io_channel > 1) {
3871                 cpu = smp_processor_id();
3872                 if (cpu < phba->sli4_hba.num_present_cpu) {
3873                         cpup = phba->sli4_hba.cpu_map;
3874                         cpup += cpu;
3875                         return cpup->channel_id;
3876                 }
3877         }
3878         chann = atomic_add_return(1, &phba->fcp_qidx);
3879         chann = (chann % phba->cfg_fcp_io_channel);
3880         return chann;
3881 }
3882
3883
3884 /**
3885  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3886  * @phba: The Hba for which this call is being executed.
3887  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3888  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3889  *
3890  * This routine assigns scsi command result by looking into response IOCB
3891  * status field appropriately. This routine handles QUEUE FULL condition as
3892  * well by ramping down device queue depth.
3893  **/
3894 static void
3895 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3896                         struct lpfc_iocbq *pIocbOut)
3897 {
3898         struct lpfc_scsi_buf *lpfc_cmd =
3899                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3900         struct lpfc_vport      *vport = pIocbIn->vport;
3901         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3902         struct lpfc_nodelist *pnode = rdata->pnode;
3903         struct scsi_cmnd *cmd;
3904         int depth;
3905         unsigned long flags;
3906         struct lpfc_fast_path_event *fast_path_evt;
3907         struct Scsi_Host *shost;
3908         uint32_t logit = LOG_FCP;
3909
3910         /* Sanity check on return of outstanding command */
3911         cmd = lpfc_cmd->pCmd;
3912         if (!cmd)
3913                 return;
3914         shost = cmd->device->host;
3915
3916         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3917         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3918         /* pick up SLI4 exhange busy status from HBA */
3919         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3920
3921 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3922         if (lpfc_cmd->prot_data_type) {
3923                 struct scsi_dif_tuple *src = NULL;
3924
3925                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3926                 /*
3927                  * Used to restore any changes to protection
3928                  * data for error injection.
3929                  */
3930                 switch (lpfc_cmd->prot_data_type) {
3931                 case LPFC_INJERR_REFTAG:
3932                         src->ref_tag =
3933                                 lpfc_cmd->prot_data;
3934                         break;
3935                 case LPFC_INJERR_APPTAG:
3936                         src->app_tag =
3937                                 (uint16_t)lpfc_cmd->prot_data;
3938                         break;
3939                 case LPFC_INJERR_GUARD:
3940                         src->guard_tag =
3941                                 (uint16_t)lpfc_cmd->prot_data;
3942                         break;
3943                 default:
3944                         break;
3945                 }
3946
3947                 lpfc_cmd->prot_data = 0;
3948                 lpfc_cmd->prot_data_type = 0;
3949                 lpfc_cmd->prot_data_segment = NULL;
3950         }
3951 #endif
3952         if (pnode && NLP_CHK_NODE_ACT(pnode))
3953                 atomic_dec(&pnode->cmd_pending);
3954
3955         if (lpfc_cmd->status) {
3956                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3957                     (lpfc_cmd->result & IOERR_DRVR_MASK))
3958                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3959                 else if (lpfc_cmd->status >= IOSTAT_CNT)
3960                         lpfc_cmd->status = IOSTAT_DEFAULT;
3961                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3962                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
3963                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3964                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3965                         logit = 0;
3966                 else
3967                         logit = LOG_FCP | LOG_FCP_UNDER;
3968                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3969                          "9030 FCP cmd x%x failed <%d/%lld> "
3970                          "status: x%x result: x%x "
3971                          "sid: x%x did: x%x oxid: x%x "
3972                          "Data: x%x x%x\n",
3973                          cmd->cmnd[0],
3974                          cmd->device ? cmd->device->id : 0xffff,
3975                          cmd->device ? cmd->device->lun : 0xffff,
3976                          lpfc_cmd->status, lpfc_cmd->result,
3977                          vport->fc_myDID,
3978                          (pnode) ? pnode->nlp_DID : 0,
3979                          phba->sli_rev == LPFC_SLI_REV4 ?
3980                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
3981                          pIocbOut->iocb.ulpContext,
3982                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
3983
3984                 switch (lpfc_cmd->status) {
3985                 case IOSTAT_FCP_RSP_ERROR:
3986                         /* Call FCP RSP handler to determine result */
3987                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
3988                         break;
3989                 case IOSTAT_NPORT_BSY:
3990                 case IOSTAT_FABRIC_BSY:
3991                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
3992                         fast_path_evt = lpfc_alloc_fast_evt(phba);
3993                         if (!fast_path_evt)
3994                                 break;
3995                         fast_path_evt->un.fabric_evt.event_type =
3996                                 FC_REG_FABRIC_EVENT;
3997                         fast_path_evt->un.fabric_evt.subcategory =
3998                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
3999                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4000                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4001                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4002                                         &pnode->nlp_portname,
4003                                         sizeof(struct lpfc_name));
4004                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4005                                         &pnode->nlp_nodename,
4006                                         sizeof(struct lpfc_name));
4007                         }
4008                         fast_path_evt->vport = vport;
4009                         fast_path_evt->work_evt.evt =
4010                                 LPFC_EVT_FASTPATH_MGMT_EVT;
4011                         spin_lock_irqsave(&phba->hbalock, flags);
4012                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
4013                                 &phba->work_list);
4014                         spin_unlock_irqrestore(&phba->hbalock, flags);
4015                         lpfc_worker_wake_up(phba);
4016                         break;
4017                 case IOSTAT_LOCAL_REJECT:
4018                 case IOSTAT_REMOTE_STOP:
4019                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4020                             lpfc_cmd->result ==
4021                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4022                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4023                             lpfc_cmd->result ==
4024                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4025                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4026                                 break;
4027                         }
4028                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4029                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4030                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4031                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4032                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
4033                                 break;
4034                         }
4035                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4036                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4037                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4038                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4039                                         /*
4040                                          * This is a response for a BG enabled
4041                                          * cmd. Parse BG error
4042                                          */
4043                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4044                                                         pIocbOut);
4045                                         break;
4046                                 } else {
4047                                         lpfc_printf_vlog(vport, KERN_WARNING,
4048                                                         LOG_BG,
4049                                                         "9031 non-zero BGSTAT "
4050                                                         "on unprotected cmd\n");
4051                                 }
4052                         }
4053                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4054                                 && (phba->sli_rev == LPFC_SLI_REV4)
4055                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4056                                 /* This IO was aborted by the target, we don't
4057                                  * know the rxid and because we did not send the
4058                                  * ABTS we cannot generate and RRQ.
4059                                  */
4060                                 lpfc_set_rrq_active(phba, pnode,
4061                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4062                                         0, 0);
4063                         }
4064                 /* else: fall through */
4065                 default:
4066                         cmd->result = ScsiResult(DID_ERROR, 0);
4067                         break;
4068                 }
4069
4070                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4071                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4072                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4073                                                  SAM_STAT_BUSY);
4074         } else
4075                 cmd->result = ScsiResult(DID_OK, 0);
4076
4077         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4078                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4079
4080                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4081                                  "0710 Iodone <%d/%llu> cmd %p, error "
4082                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4083                                  cmd->device->id, cmd->device->lun, cmd,
4084                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4085                                  scsi_get_resid(cmd));
4086         }
4087
4088         lpfc_update_stats(phba, lpfc_cmd);
4089         if (vport->cfg_max_scsicmpl_time &&
4090            time_after(jiffies, lpfc_cmd->start_time +
4091                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4092                 spin_lock_irqsave(shost->host_lock, flags);
4093                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4094                         if (pnode->cmd_qdepth >
4095                                 atomic_read(&pnode->cmd_pending) &&
4096                                 (atomic_read(&pnode->cmd_pending) >
4097                                 LPFC_MIN_TGT_QDEPTH) &&
4098                                 ((cmd->cmnd[0] == READ_10) ||
4099                                 (cmd->cmnd[0] == WRITE_10)))
4100                                 pnode->cmd_qdepth =
4101                                         atomic_read(&pnode->cmd_pending);
4102
4103                         pnode->last_change_time = jiffies;
4104                 }
4105                 spin_unlock_irqrestore(shost->host_lock, flags);
4106         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4107                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4108                    time_after(jiffies, pnode->last_change_time +
4109                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4110                         spin_lock_irqsave(shost->host_lock, flags);
4111                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4112                                 / 100;
4113                         depth = depth ? depth : 1;
4114                         pnode->cmd_qdepth += depth;
4115                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4116                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4117                         pnode->last_change_time = jiffies;
4118                         spin_unlock_irqrestore(shost->host_lock, flags);
4119                 }
4120         }
4121
4122         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4123
4124         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4125         cmd->scsi_done(cmd);
4126
4127         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4128                 spin_lock_irqsave(&phba->hbalock, flags);
4129                 lpfc_cmd->pCmd = NULL;
4130                 spin_unlock_irqrestore(&phba->hbalock, flags);
4131
4132                 /*
4133                  * If there is a thread waiting for command completion
4134                  * wake up the thread.
4135                  */
4136                 spin_lock_irqsave(shost->host_lock, flags);
4137                 if (lpfc_cmd->waitq)
4138                         wake_up(lpfc_cmd->waitq);
4139                 spin_unlock_irqrestore(shost->host_lock, flags);
4140                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4141                 return;
4142         }
4143
4144         spin_lock_irqsave(&phba->hbalock, flags);
4145         lpfc_cmd->pCmd = NULL;
4146         spin_unlock_irqrestore(&phba->hbalock, flags);
4147
4148         /*
4149          * If there is a thread waiting for command completion
4150          * wake up the thread.
4151          */
4152         spin_lock_irqsave(shost->host_lock, flags);
4153         if (lpfc_cmd->waitq)
4154                 wake_up(lpfc_cmd->waitq);
4155         spin_unlock_irqrestore(shost->host_lock, flags);
4156
4157         lpfc_release_scsi_buf(phba, lpfc_cmd);
4158 }
4159
4160 /**
4161  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4162  * @data: A pointer to the immediate command data portion of the IOCB.
4163  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4164  *
4165  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4166  * byte swapping the data to big endian format for transmission on the wire.
4167  **/
4168 static void
4169 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4170 {
4171         int i, j;
4172         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4173              i += sizeof(uint32_t), j++) {
4174                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4175         }
4176 }
4177
4178 /**
4179  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4180  * @vport: The virtual port for which this call is being executed.
4181  * @lpfc_cmd: The scsi command which needs to send.
4182  * @pnode: Pointer to lpfc_nodelist.
4183  *
4184  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4185  * to transfer for device with SLI3 interface spec.
4186  **/
4187 static void
4188 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4189                     struct lpfc_nodelist *pnode)
4190 {
4191         struct lpfc_hba *phba = vport->phba;
4192         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4193         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4194         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4195         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4196         int datadir = scsi_cmnd->sc_data_direction;
4197         uint8_t *ptr;
4198         bool sli4;
4199         uint32_t fcpdl;
4200
4201         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4202                 return;
4203
4204         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4205         /* clear task management bits */
4206         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4207
4208         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4209                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4210
4211         ptr = &fcp_cmnd->fcpCdb[0];
4212         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4213         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4214                 ptr += scsi_cmnd->cmd_len;
4215                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4216         }
4217
4218         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4219
4220         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4221         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4222
4223         /*
4224          * There are three possibilities here - use scatter-gather segment, use
4225          * the single mapping, or neither.  Start the lpfc command prep by
4226          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4227          * data bde entry.
4228          */
4229         if (scsi_sg_count(scsi_cmnd)) {
4230                 if (datadir == DMA_TO_DEVICE) {
4231                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4232                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4233                         if (vport->cfg_first_burst_size &&
4234                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4235                                 fcpdl = scsi_bufflen(scsi_cmnd);
4236                                 if (fcpdl < vport->cfg_first_burst_size)
4237                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4238                                 else
4239                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4240                                                 vport->cfg_first_burst_size;
4241                         }
4242                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4243                         phba->fc4OutputRequests++;
4244                 } else {
4245                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4246                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4247                         fcp_cmnd->fcpCntl3 = READ_DATA;
4248                         phba->fc4InputRequests++;
4249                 }
4250         } else {
4251                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4252                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4253                 iocb_cmd->ulpPU = 0;
4254                 fcp_cmnd->fcpCntl3 = 0;
4255                 phba->fc4ControlRequests++;
4256         }
4257         if (phba->sli_rev == 3 &&
4258             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4259                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4260         /*
4261          * Finish initializing those IOCB fields that are independent
4262          * of the scsi_cmnd request_buffer
4263          */
4264         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4265         if (sli4)
4266                 piocbq->iocb.ulpContext =
4267                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4268         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4269                 piocbq->iocb.ulpFCP2Rcvy = 1;
4270         else
4271                 piocbq->iocb.ulpFCP2Rcvy = 0;
4272
4273         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4274         piocbq->context1  = lpfc_cmd;
4275         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4276         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4277         piocbq->vport = vport;
4278 }
4279
4280 /**
4281  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4282  * @vport: The virtual port for which this call is being executed.
4283  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4284  * @lun: Logical unit number.
4285  * @task_mgmt_cmd: SCSI task management command.
4286  *
4287  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4288  * for device with SLI-3 interface spec.
4289  *
4290  * Return codes:
4291  *   0 - Error
4292  *   1 - Success
4293  **/
4294 static int
4295 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4296                              struct lpfc_scsi_buf *lpfc_cmd,
4297                              uint64_t lun,
4298                              uint8_t task_mgmt_cmd)
4299 {
4300         struct lpfc_iocbq *piocbq;
4301         IOCB_t *piocb;
4302         struct fcp_cmnd *fcp_cmnd;
4303         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4304         struct lpfc_nodelist *ndlp = rdata->pnode;
4305
4306         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4307             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4308                 return 0;
4309
4310         piocbq = &(lpfc_cmd->cur_iocbq);
4311         piocbq->vport = vport;
4312
4313         piocb = &piocbq->iocb;
4314
4315         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4316         /* Clear out any old data in the FCP command area */
4317         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4318         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4319         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4320         if (vport->phba->sli_rev == 3 &&
4321             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4322                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4323         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4324         piocb->ulpContext = ndlp->nlp_rpi;
4325         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4326                 piocb->ulpContext =
4327                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4328         }
4329         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4330         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4331         piocb->ulpPU = 0;
4332         piocb->un.fcpi.fcpi_parm = 0;
4333
4334         /* ulpTimeout is only one byte */
4335         if (lpfc_cmd->timeout > 0xff) {
4336                 /*
4337                  * Do not timeout the command at the firmware level.
4338                  * The driver will provide the timeout mechanism.
4339                  */
4340                 piocb->ulpTimeout = 0;
4341         } else
4342                 piocb->ulpTimeout = lpfc_cmd->timeout;
4343
4344         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4345                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4346
4347         return 1;
4348 }
4349
4350 /**
4351  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4352  * @phba: The hba struct for which this call is being executed.
4353  * @dev_grp: The HBA PCI-Device group number.
4354  *
4355  * This routine sets up the SCSI interface API function jump table in @phba
4356  * struct.
4357  * Returns: 0 - success, -ENODEV - failure.
4358  **/
4359 int
4360 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4361 {
4362
4363         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4364         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4365
4366         switch (dev_grp) {
4367         case LPFC_PCI_DEV_LP:
4368                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4369                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4370                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4371                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4372                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4373                 break;
4374         case LPFC_PCI_DEV_OC:
4375                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4376                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4377                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4378                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4379                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4380                 break;
4381         default:
4382                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4383                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4384                                 dev_grp);
4385                 return -ENODEV;
4386                 break;
4387         }
4388         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4389         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4390         return 0;
4391 }
4392
4393 /**
4394  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4395  * @phba: The Hba for which this call is being executed.
4396  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4397  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4398  *
4399  * This routine is IOCB completion routine for device reset and target reset
4400  * routine. This routine release scsi buffer associated with lpfc_cmd.
4401  **/
4402 static void
4403 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4404                         struct lpfc_iocbq *cmdiocbq,
4405                         struct lpfc_iocbq *rspiocbq)
4406 {
4407         struct lpfc_scsi_buf *lpfc_cmd =
4408                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4409         if (lpfc_cmd)
4410                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4411         return;
4412 }
4413
4414 /**
4415  * lpfc_info - Info entry point of scsi_host_template data structure
4416  * @host: The scsi host for which this call is being executed.
4417  *
4418  * This routine provides module information about hba.
4419  *
4420  * Reutrn code:
4421  *   Pointer to char - Success.
4422  **/
4423 const char *
4424 lpfc_info(struct Scsi_Host *host)
4425 {
4426         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4427         struct lpfc_hba   *phba = vport->phba;
4428         int len, link_speed = 0;
4429         static char  lpfcinfobuf[384];
4430
4431         memset(lpfcinfobuf,0,384);
4432         if (phba && phba->pcidev){
4433                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4434                 len = strlen(lpfcinfobuf);
4435                 snprintf(lpfcinfobuf + len,
4436                         384-len,
4437                         " on PCI bus %02x device %02x irq %d",
4438                         phba->pcidev->bus->number,
4439                         phba->pcidev->devfn,
4440                         phba->pcidev->irq);
4441                 len = strlen(lpfcinfobuf);
4442                 if (phba->Port[0]) {
4443                         snprintf(lpfcinfobuf + len,
4444                                  384-len,
4445                                  " port %s",
4446                                  phba->Port);
4447                 }
4448                 len = strlen(lpfcinfobuf);
4449                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4450                         link_speed = lpfc_sli_port_speed_get(phba);
4451                 } else {
4452                         if (phba->sli4_hba.link_state.logical_speed)
4453                                 link_speed =
4454                                       phba->sli4_hba.link_state.logical_speed;
4455                         else
4456                                 link_speed = phba->sli4_hba.link_state.speed;
4457                 }
4458                 if (link_speed != 0)
4459                         snprintf(lpfcinfobuf + len, 384-len,
4460                                  " Logical Link Speed: %d Mbps", link_speed);
4461         }
4462         return lpfcinfobuf;
4463 }
4464
4465 /**
4466  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4467  * @phba: The Hba for which this call is being executed.
4468  *
4469  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4470  * The default value of cfg_poll_tmo is 10 milliseconds.
4471  **/
4472 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4473 {
4474         unsigned long  poll_tmo_expires =
4475                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4476
4477         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4478                 mod_timer(&phba->fcp_poll_timer,
4479                           poll_tmo_expires);
4480 }
4481
4482 /**
4483  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4484  * @phba: The Hba for which this call is being executed.
4485  *
4486  * This routine starts the fcp_poll_timer of @phba.
4487  **/
4488 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4489 {
4490         lpfc_poll_rearm_timer(phba);
4491 }
4492
4493 /**
4494  * lpfc_poll_timeout - Restart polling timer
4495  * @ptr: Map to lpfc_hba data structure pointer.
4496  *
4497  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4498  * and FCP Ring interrupt is disable.
4499  **/
4500
4501 void lpfc_poll_timeout(unsigned long ptr)
4502 {
4503         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4504
4505         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4506                 lpfc_sli_handle_fast_ring_event(phba,
4507                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4508
4509                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4510                         lpfc_poll_rearm_timer(phba);
4511         }
4512 }
4513
4514 /**
4515  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4516  * @cmnd: Pointer to scsi_cmnd data structure.
4517  * @done: Pointer to done routine.
4518  *
4519  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4520  * This routine prepares an IOCB from scsi command and provides to firmware.
4521  * The @done callback is invoked after driver finished processing the command.
4522  *
4523  * Return value :
4524  *   0 - Success
4525  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4526  **/
4527 static int
4528 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4529 {
4530         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4531         struct lpfc_hba   *phba = vport->phba;
4532         struct lpfc_rport_data *rdata;
4533         struct lpfc_nodelist *ndlp;
4534         struct lpfc_scsi_buf *lpfc_cmd;
4535         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4536         int err;
4537
4538         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4539         err = fc_remote_port_chkready(rport);
4540         if (err) {
4541                 cmnd->result = err;
4542                 goto out_fail_command;
4543         }
4544         ndlp = rdata->pnode;
4545
4546         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4547                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4548
4549                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4550                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4551                                 " op:%02x str=%s without registering for"
4552                                 " BlockGuard - Rejecting command\n",
4553                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4554                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4555                 goto out_fail_command;
4556         }
4557
4558         /*
4559          * Catch race where our node has transitioned, but the
4560          * transport is still transitioning.
4561          */
4562         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4563                 goto out_tgt_busy;
4564         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4565                 goto out_tgt_busy;
4566
4567         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4568         if (lpfc_cmd == NULL) {
4569                 lpfc_rampdown_queue_depth(phba);
4570
4571                 lpfc_printf_vlog(vport, KERN_INFO, LOG_MISC,
4572                                  "0707 driver's buffer pool is empty, "
4573                                  "IO busied\n");
4574                 goto out_host_busy;
4575         }
4576
4577         /*
4578          * Store the midlayer's command structure for the completion phase
4579          * and complete the command initialization.
4580          */
4581         lpfc_cmd->pCmd  = cmnd;
4582         lpfc_cmd->rdata = rdata;
4583         lpfc_cmd->timeout = 0;
4584         lpfc_cmd->start_time = jiffies;
4585         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4586
4587         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4588                 if (vport->phba->cfg_enable_bg) {
4589                         lpfc_printf_vlog(vport,
4590                                          KERN_INFO, LOG_SCSI_CMD,
4591                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4592                                          "sector x%llx cnt %u pt %x\n",
4593                                          dif_op_str[scsi_get_prot_op(cmnd)],
4594                                          cmnd->cmnd[0],
4595                                          (unsigned long long)scsi_get_lba(cmnd),
4596                                          blk_rq_sectors(cmnd->request),
4597                                          (cmnd->cmnd[1]>>5));
4598                 }
4599                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4600         } else {
4601                 if (vport->phba->cfg_enable_bg) {
4602                         lpfc_printf_vlog(vport,
4603                                          KERN_INFO, LOG_SCSI_CMD,
4604                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4605                                          "x%x sector x%llx cnt %u pt %x\n",
4606                                          cmnd->cmnd[0],
4607                                          (unsigned long long)scsi_get_lba(cmnd),
4608                                          blk_rq_sectors(cmnd->request),
4609                                          (cmnd->cmnd[1]>>5));
4610                 }
4611                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4612         }
4613
4614         if (err)
4615                 goto out_host_busy_free_buf;
4616
4617         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4618
4619         atomic_inc(&ndlp->cmd_pending);
4620         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4621                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4622         if (err) {
4623                 atomic_dec(&ndlp->cmd_pending);
4624                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4625                                  "3376 FCP could not issue IOCB err %x"
4626                                  "FCP cmd x%x <%d/%llu> "
4627                                  "sid: x%x did: x%x oxid: x%x "
4628                                  "Data: x%x x%x x%x x%x\n",
4629                                  err, cmnd->cmnd[0],
4630                                  cmnd->device ? cmnd->device->id : 0xffff,
4631                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4632                                  vport->fc_myDID, ndlp->nlp_DID,
4633                                  phba->sli_rev == LPFC_SLI_REV4 ?
4634                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4635                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4636                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4637                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4638                                  (uint32_t)
4639                                  (cmnd->request->timeout / 1000));
4640
4641
4642                 goto out_host_busy_free_buf;
4643         }
4644         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4645                 lpfc_sli_handle_fast_ring_event(phba,
4646                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4647
4648                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4649                         lpfc_poll_rearm_timer(phba);
4650         }
4651
4652         return 0;
4653
4654  out_host_busy_free_buf:
4655         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4656         lpfc_release_scsi_buf(phba, lpfc_cmd);
4657  out_host_busy:
4658         return SCSI_MLQUEUE_HOST_BUSY;
4659
4660  out_tgt_busy:
4661         return SCSI_MLQUEUE_TARGET_BUSY;
4662
4663  out_fail_command:
4664         cmnd->scsi_done(cmnd);
4665         return 0;
4666 }
4667
4668
4669 /**
4670  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4671  * @cmnd: Pointer to scsi_cmnd data structure.
4672  *
4673  * This routine aborts @cmnd pending in base driver.
4674  *
4675  * Return code :
4676  *   0x2003 - Error
4677  *   0x2002 - Success
4678  **/
4679 static int
4680 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4681 {
4682         struct Scsi_Host  *shost = cmnd->device->host;
4683         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4684         struct lpfc_hba   *phba = vport->phba;
4685         struct lpfc_iocbq *iocb;
4686         struct lpfc_iocbq *abtsiocb;
4687         struct lpfc_scsi_buf *lpfc_cmd;
4688         IOCB_t *cmd, *icmd;
4689         int ret = SUCCESS, status = 0;
4690         struct lpfc_sli_ring *pring_s4;
4691         int ring_number, ret_val;
4692         unsigned long flags, iflags;
4693         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4694
4695         status = fc_block_scsi_eh(cmnd);
4696         if (status != 0 && status != SUCCESS)
4697                 return status;
4698
4699         spin_lock_irqsave(&phba->hbalock, flags);
4700         /* driver queued commands are in process of being flushed */
4701         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4702                 spin_unlock_irqrestore(&phba->hbalock, flags);
4703                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4704                         "3168 SCSI Layer abort requested I/O has been "
4705                         "flushed by LLD.\n");
4706                 return FAILED;
4707         }
4708
4709         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4710         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4711                 spin_unlock_irqrestore(&phba->hbalock, flags);
4712                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4713                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4714                          "x%x ID %d LUN %llu\n",
4715                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4716                 return SUCCESS;
4717         }
4718
4719         iocb = &lpfc_cmd->cur_iocbq;
4720         /* the command is in process of being cancelled */
4721         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4722                 spin_unlock_irqrestore(&phba->hbalock, flags);
4723                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4724                         "3169 SCSI Layer abort requested I/O has been "
4725                         "cancelled by LLD.\n");
4726                 return FAILED;
4727         }
4728         /*
4729          * If pCmd field of the corresponding lpfc_scsi_buf structure
4730          * points to a different SCSI command, then the driver has
4731          * already completed this command, but the midlayer did not
4732          * see the completion before the eh fired. Just return SUCCESS.
4733          */
4734         if (lpfc_cmd->pCmd != cmnd) {
4735                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4736                         "3170 SCSI Layer abort requested I/O has been "
4737                         "completed by LLD.\n");
4738                 goto out_unlock;
4739         }
4740
4741         BUG_ON(iocb->context1 != lpfc_cmd);
4742
4743         /* abort issued in recovery is still in progress */
4744         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4745                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4746                          "3389 SCSI Layer I/O Abort Request is pending\n");
4747                 spin_unlock_irqrestore(&phba->hbalock, flags);
4748                 goto wait_for_cmpl;
4749         }
4750
4751         abtsiocb = __lpfc_sli_get_iocbq(phba);
4752         if (abtsiocb == NULL) {
4753                 ret = FAILED;
4754                 goto out_unlock;
4755         }
4756
4757         /* Indicate the IO is being aborted by the driver. */
4758         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4759
4760         /*
4761          * The scsi command can not be in txq and it is in flight because the
4762          * pCmd is still pointig at the SCSI command we have to abort. There
4763          * is no need to search the txcmplq. Just send an abort to the FW.
4764          */
4765
4766         cmd = &iocb->iocb;
4767         icmd = &abtsiocb->iocb;
4768         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4769         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4770         if (phba->sli_rev == LPFC_SLI_REV4)
4771                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4772         else
4773                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4774
4775         icmd->ulpLe = 1;
4776         icmd->ulpClass = cmd->ulpClass;
4777
4778         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4779         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4780         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4781         if (iocb->iocb_flag & LPFC_IO_FOF)
4782                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4783
4784         if (lpfc_is_link_up(phba))
4785                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4786         else
4787                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4788
4789         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4790         abtsiocb->vport = vport;
4791         if (phba->sli_rev == LPFC_SLI_REV4) {
4792                 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
4793                 pring_s4 = &phba->sli.ring[ring_number];
4794                 /* Note: both hbalock and ring_lock must be set here */
4795                 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4796                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4797                                                 abtsiocb, 0);
4798                 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4799         } else {
4800                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4801                                                 abtsiocb, 0);
4802         }
4803         /* no longer need the lock after this point */
4804         spin_unlock_irqrestore(&phba->hbalock, flags);
4805
4806
4807         if (ret_val == IOCB_ERROR) {
4808                 lpfc_sli_release_iocbq(phba, abtsiocb);
4809                 ret = FAILED;
4810                 goto out;
4811         }
4812
4813         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4814                 lpfc_sli_handle_fast_ring_event(phba,
4815                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4816
4817 wait_for_cmpl:
4818         lpfc_cmd->waitq = &waitq;
4819         /* Wait for abort to complete */
4820         wait_event_timeout(waitq,
4821                           (lpfc_cmd->pCmd != cmnd),
4822                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4823
4824         spin_lock_irqsave(shost->host_lock, flags);
4825         lpfc_cmd->waitq = NULL;
4826         spin_unlock_irqrestore(shost->host_lock, flags);
4827
4828         if (lpfc_cmd->pCmd == cmnd) {
4829                 ret = FAILED;
4830                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4831                                  "0748 abort handler timed out waiting "
4832                                  "for abortng I/O (xri:x%x) to complete: "
4833                                  "ret %#x, ID %d, LUN %llu\n",
4834                                  iocb->sli4_xritag, ret,
4835                                  cmnd->device->id, cmnd->device->lun);
4836         }
4837         goto out;
4838
4839 out_unlock:
4840         spin_unlock_irqrestore(&phba->hbalock, flags);
4841 out:
4842         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4843                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4844                          "LUN %llu\n", ret, cmnd->device->id,
4845                          cmnd->device->lun);
4846         return ret;
4847 }
4848
4849 static char *
4850 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4851 {
4852         switch (task_mgmt_cmd) {
4853         case FCP_ABORT_TASK_SET:
4854                 return "ABORT_TASK_SET";
4855         case FCP_CLEAR_TASK_SET:
4856                 return "FCP_CLEAR_TASK_SET";
4857         case FCP_BUS_RESET:
4858                 return "FCP_BUS_RESET";
4859         case FCP_LUN_RESET:
4860                 return "FCP_LUN_RESET";
4861         case FCP_TARGET_RESET:
4862                 return "FCP_TARGET_RESET";
4863         case FCP_CLEAR_ACA:
4864                 return "FCP_CLEAR_ACA";
4865         case FCP_TERMINATE_TASK:
4866                 return "FCP_TERMINATE_TASK";
4867         default:
4868                 return "unknown";
4869         }
4870 }
4871
4872
4873 /**
4874  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4875  * @vport: The virtual port for which this call is being executed.
4876  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4877  *
4878  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4879  *
4880  * Return code :
4881  *   0x2003 - Error
4882  *   0x2002 - Success
4883  **/
4884 static int
4885 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4886 {
4887         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4888         uint32_t rsp_info;
4889         uint32_t rsp_len;
4890         uint8_t  rsp_info_code;
4891         int ret = FAILED;
4892
4893
4894         if (fcprsp == NULL)
4895                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4896                                  "0703 fcp_rsp is missing\n");
4897         else {
4898                 rsp_info = fcprsp->rspStatus2;
4899                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4900                 rsp_info_code = fcprsp->rspInfo3;
4901
4902
4903                 lpfc_printf_vlog(vport, KERN_INFO,
4904                                  LOG_FCP,
4905                                  "0706 fcp_rsp valid 0x%x,"
4906                                  " rsp len=%d code 0x%x\n",
4907                                  rsp_info,
4908                                  rsp_len, rsp_info_code);
4909
4910                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
4911                         switch (rsp_info_code) {
4912                         case RSP_NO_FAILURE:
4913                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4914                                                  "0715 Task Mgmt No Failure\n");
4915                                 ret = SUCCESS;
4916                                 break;
4917                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4918                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4919                                                  "0716 Task Mgmt Target "
4920                                                 "reject\n");
4921                                 break;
4922                         case RSP_TM_NOT_COMPLETED: /* TM failed */
4923                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4924                                                  "0717 Task Mgmt Target "
4925                                                 "failed TM\n");
4926                                 break;
4927                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4928                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4929                                                  "0718 Task Mgmt to invalid "
4930                                                 "LUN\n");
4931                                 break;
4932                         }
4933                 }
4934         }
4935         return ret;
4936 }
4937
4938
4939 /**
4940  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
4941  * @vport: The virtual port for which this call is being executed.
4942  * @rdata: Pointer to remote port local data
4943  * @tgt_id: Target ID of remote device.
4944  * @lun_id: Lun number for the TMF
4945  * @task_mgmt_cmd: type of TMF to send
4946  *
4947  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
4948  * a remote port.
4949  *
4950  * Return Code:
4951  *   0x2003 - Error
4952  *   0x2002 - Success.
4953  **/
4954 static int
4955 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
4956                     unsigned  tgt_id, uint64_t lun_id,
4957                     uint8_t task_mgmt_cmd)
4958 {
4959         struct lpfc_hba   *phba = vport->phba;
4960         struct lpfc_scsi_buf *lpfc_cmd;
4961         struct lpfc_iocbq *iocbq;
4962         struct lpfc_iocbq *iocbqrsp;
4963         struct lpfc_nodelist *pnode = rdata->pnode;
4964         int ret;
4965         int status;
4966
4967         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4968                 return FAILED;
4969
4970         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
4971         if (lpfc_cmd == NULL)
4972                 return FAILED;
4973         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
4974         lpfc_cmd->rdata = rdata;
4975
4976         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
4977                                            task_mgmt_cmd);
4978         if (!status) {
4979                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4980                 return FAILED;
4981         }
4982
4983         iocbq = &lpfc_cmd->cur_iocbq;
4984         iocbqrsp = lpfc_sli_get_iocbq(phba);
4985         if (iocbqrsp == NULL) {
4986                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4987                 return FAILED;
4988         }
4989         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
4990
4991         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4992                          "0702 Issue %s to TGT %d LUN %llu "
4993                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
4994                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
4995                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
4996                          iocbq->iocb_flag);
4997
4998         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
4999                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5000         if ((status != IOCB_SUCCESS) ||
5001             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5002                 if (status != IOCB_SUCCESS ||
5003                     iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5004                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5005                                          "0727 TMF %s to TGT %d LUN %llu "
5006                                          "failed (%d, %d) iocb_flag x%x\n",
5007                                          lpfc_taskmgmt_name(task_mgmt_cmd),
5008                                          tgt_id, lun_id,
5009                                          iocbqrsp->iocb.ulpStatus,
5010                                          iocbqrsp->iocb.un.ulpWord[4],
5011                                          iocbq->iocb_flag);
5012                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
5013                 if (status == IOCB_SUCCESS) {
5014                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
5015                                 /* Something in the FCP_RSP was invalid.
5016                                  * Check conditions */
5017                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
5018                         else
5019                                 ret = FAILED;
5020                 } else if (status == IOCB_TIMEDOUT) {
5021                         ret = TIMEOUT_ERROR;
5022                 } else {
5023                         ret = FAILED;
5024                 }
5025         } else
5026                 ret = SUCCESS;
5027
5028         lpfc_sli_release_iocbq(phba, iocbqrsp);
5029
5030         if (ret != TIMEOUT_ERROR)
5031                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5032
5033         return ret;
5034 }
5035
5036 /**
5037  * lpfc_chk_tgt_mapped -
5038  * @vport: The virtual port to check on
5039  * @cmnd: Pointer to scsi_cmnd data structure.
5040  *
5041  * This routine delays until the scsi target (aka rport) for the
5042  * command exists (is present and logged in) or we declare it non-existent.
5043  *
5044  * Return code :
5045  *  0x2003 - Error
5046  *  0x2002 - Success
5047  **/
5048 static int
5049 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5050 {
5051         struct lpfc_rport_data *rdata;
5052         struct lpfc_nodelist *pnode;
5053         unsigned long later;
5054
5055         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5056         if (!rdata) {
5057                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5058                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5059                 return FAILED;
5060         }
5061         pnode = rdata->pnode;
5062         /*
5063          * If target is not in a MAPPED state, delay until
5064          * target is rediscovered or devloss timeout expires.
5065          */
5066         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5067         while (time_after(later, jiffies)) {
5068                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5069                         return FAILED;
5070                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5071                         return SUCCESS;
5072                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5073                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5074                 if (!rdata)
5075                         return FAILED;
5076                 pnode = rdata->pnode;
5077         }
5078         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5079             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5080                 return FAILED;
5081         return SUCCESS;
5082 }
5083
5084 /**
5085  * lpfc_reset_flush_io_context -
5086  * @vport: The virtual port (scsi_host) for the flush context
5087  * @tgt_id: If aborting by Target contect - specifies the target id
5088  * @lun_id: If aborting by Lun context - specifies the lun id
5089  * @context: specifies the context level to flush at.
5090  *
5091  * After a reset condition via TMF, we need to flush orphaned i/o
5092  * contexts from the adapter. This routine aborts any contexts
5093  * outstanding, then waits for their completions. The wait is
5094  * bounded by devloss_tmo though.
5095  *
5096  * Return code :
5097  *  0x2003 - Error
5098  *  0x2002 - Success
5099  **/
5100 static int
5101 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5102                         uint64_t lun_id, lpfc_ctx_cmd context)
5103 {
5104         struct lpfc_hba   *phba = vport->phba;
5105         unsigned long later;
5106         int cnt;
5107
5108         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5109         if (cnt)
5110                 lpfc_sli_abort_taskmgmt(vport,
5111                                         &phba->sli.ring[phba->sli.fcp_ring],
5112                                         tgt_id, lun_id, context);
5113         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5114         while (time_after(later, jiffies) && cnt) {
5115                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5116                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5117         }
5118         if (cnt) {
5119                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5120                         "0724 I/O flush failure for context %s : cnt x%x\n",
5121                         ((context == LPFC_CTX_LUN) ? "LUN" :
5122                          ((context == LPFC_CTX_TGT) ? "TGT" :
5123                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5124                         cnt);
5125                 return FAILED;
5126         }
5127         return SUCCESS;
5128 }
5129
5130 /**
5131  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5132  * @cmnd: Pointer to scsi_cmnd data structure.
5133  *
5134  * This routine does a device reset by sending a LUN_RESET task management
5135  * command.
5136  *
5137  * Return code :
5138  *  0x2003 - Error
5139  *  0x2002 - Success
5140  **/
5141 static int
5142 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5143 {
5144         struct Scsi_Host  *shost = cmnd->device->host;
5145         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5146         struct lpfc_rport_data *rdata;
5147         struct lpfc_nodelist *pnode;
5148         unsigned tgt_id = cmnd->device->id;
5149         uint64_t lun_id = cmnd->device->lun;
5150         struct lpfc_scsi_event_header scsi_event;
5151         int status;
5152
5153         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5154         if (!rdata || !rdata->pnode) {
5155                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5156                                  "0798 Device Reset rport failure: rdata x%p\n",
5157                                  rdata);
5158                 return FAILED;
5159         }
5160         pnode = rdata->pnode;
5161         status = fc_block_scsi_eh(cmnd);
5162         if (status != 0 && status != SUCCESS)
5163                 return status;
5164
5165         status = lpfc_chk_tgt_mapped(vport, cmnd);
5166         if (status == FAILED) {
5167                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5168                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5169                 return FAILED;
5170         }
5171
5172         scsi_event.event_type = FC_REG_SCSI_EVENT;
5173         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5174         scsi_event.lun = lun_id;
5175         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5176         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5177
5178         fc_host_post_vendor_event(shost, fc_get_event_number(),
5179                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5180
5181         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5182                                                 FCP_LUN_RESET);
5183
5184         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5185                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5186                          "return x%x\n", tgt_id, lun_id, status);
5187
5188         /*
5189          * We have to clean up i/o as : they may be orphaned by the TMF;
5190          * or if the TMF failed, they may be in an indeterminate state.
5191          * So, continue on.
5192          * We will report success if all the i/o aborts successfully.
5193          */
5194         if (status == SUCCESS)
5195                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5196                                                 LPFC_CTX_LUN);
5197
5198         return status;
5199 }
5200
5201 /**
5202  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5203  * @cmnd: Pointer to scsi_cmnd data structure.
5204  *
5205  * This routine does a target reset by sending a TARGET_RESET task management
5206  * command.
5207  *
5208  * Return code :
5209  *  0x2003 - Error
5210  *  0x2002 - Success
5211  **/
5212 static int
5213 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5214 {
5215         struct Scsi_Host  *shost = cmnd->device->host;
5216         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5217         struct lpfc_rport_data *rdata;
5218         struct lpfc_nodelist *pnode;
5219         unsigned tgt_id = cmnd->device->id;
5220         uint64_t lun_id = cmnd->device->lun;
5221         struct lpfc_scsi_event_header scsi_event;
5222         int status;
5223
5224         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5225         if (!rdata) {
5226                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5227                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5228                 return FAILED;
5229         }
5230         pnode = rdata->pnode;
5231         status = fc_block_scsi_eh(cmnd);
5232         if (status != 0 && status != SUCCESS)
5233                 return status;
5234
5235         status = lpfc_chk_tgt_mapped(vport, cmnd);
5236         if (status == FAILED) {
5237                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5238                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5239                 if (pnode) {
5240                         spin_lock_irq(shost->host_lock);
5241                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5242                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5243                         spin_unlock_irq(shost->host_lock);
5244                 }
5245                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5246                                           LPFC_CTX_TGT);
5247                 return FAST_IO_FAIL;
5248         }
5249
5250         scsi_event.event_type = FC_REG_SCSI_EVENT;
5251         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5252         scsi_event.lun = 0;
5253         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5254         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5255
5256         fc_host_post_vendor_event(shost, fc_get_event_number(),
5257                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5258
5259         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5260                                         FCP_TARGET_RESET);
5261
5262         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5263                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5264                          "return x%x\n", tgt_id, lun_id, status);
5265
5266         /*
5267          * We have to clean up i/o as : they may be orphaned by the TMF;
5268          * or if the TMF failed, they may be in an indeterminate state.
5269          * So, continue on.
5270          * We will report success if all the i/o aborts successfully.
5271          */
5272         if (status == SUCCESS)
5273                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5274                                           LPFC_CTX_TGT);
5275         return status;
5276 }
5277
5278 /**
5279  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5280  * @cmnd: Pointer to scsi_cmnd data structure.
5281  *
5282  * This routine does target reset to all targets on @cmnd->device->host.
5283  * This emulates Parallel SCSI Bus Reset Semantics.
5284  *
5285  * Return code :
5286  *  0x2003 - Error
5287  *  0x2002 - Success
5288  **/
5289 static int
5290 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5291 {
5292         struct Scsi_Host  *shost = cmnd->device->host;
5293         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5294         struct lpfc_nodelist *ndlp = NULL;
5295         struct lpfc_scsi_event_header scsi_event;
5296         int match;
5297         int ret = SUCCESS, status, i;
5298
5299         scsi_event.event_type = FC_REG_SCSI_EVENT;
5300         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5301         scsi_event.lun = 0;
5302         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5303         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5304
5305         fc_host_post_vendor_event(shost, fc_get_event_number(),
5306                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5307
5308         status = fc_block_scsi_eh(cmnd);
5309         if (status != 0 && status != SUCCESS)
5310                 return status;
5311
5312         /*
5313          * Since the driver manages a single bus device, reset all
5314          * targets known to the driver.  Should any target reset
5315          * fail, this routine returns failure to the midlayer.
5316          */
5317         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5318                 /* Search for mapped node by target ID */
5319                 match = 0;
5320                 spin_lock_irq(shost->host_lock);
5321                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5322                         if (!NLP_CHK_NODE_ACT(ndlp))
5323                                 continue;
5324                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5325                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5326                                 continue;
5327                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5328                             ndlp->nlp_sid == i &&
5329                             ndlp->rport) {
5330                                 match = 1;
5331                                 break;
5332                         }
5333                 }
5334                 spin_unlock_irq(shost->host_lock);
5335                 if (!match)
5336                         continue;
5337
5338                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5339                                         i, 0, FCP_TARGET_RESET);
5340
5341                 if (status != SUCCESS) {
5342                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5343                                          "0700 Bus Reset on target %d failed\n",
5344                                          i);
5345                         ret = FAILED;
5346                 }
5347         }
5348         /*
5349          * We have to clean up i/o as : they may be orphaned by the TMFs
5350          * above; or if any of the TMFs failed, they may be in an
5351          * indeterminate state.
5352          * We will report success if all the i/o aborts successfully.
5353          */
5354
5355         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5356         if (status != SUCCESS)
5357                 ret = FAILED;
5358
5359         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5360                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5361         return ret;
5362 }
5363
5364 /**
5365  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5366  * @cmnd: Pointer to scsi_cmnd data structure.
5367  *
5368  * This routine does host reset to the adaptor port. It brings the HBA
5369  * offline, performs a board restart, and then brings the board back online.
5370  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5371  * reject all outstanding SCSI commands to the host and error returned
5372  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5373  * of error handling, it will only return error if resetting of the adapter
5374  * is not successful; in all other cases, will return success.
5375  *
5376  * Return code :
5377  *  0x2003 - Error
5378  *  0x2002 - Success
5379  **/
5380 static int
5381 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5382 {
5383         struct Scsi_Host *shost = cmnd->device->host;
5384         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5385         struct lpfc_hba *phba = vport->phba;
5386         int rc, ret = SUCCESS;
5387
5388         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5389                          "3172 SCSI layer issued Host Reset Data:\n");
5390
5391         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5392         lpfc_offline(phba);
5393         rc = lpfc_sli_brdrestart(phba);
5394         if (rc)
5395                 ret = FAILED;
5396         rc = lpfc_online(phba);
5397         if (rc)
5398                 ret = FAILED;
5399         lpfc_unblock_mgmt_io(phba);
5400
5401         if (ret == FAILED) {
5402                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5403                                  "3323 Failed host reset, bring it offline\n");
5404                 lpfc_sli4_offline_eratt(phba);
5405         }
5406         return ret;
5407 }
5408
5409 /**
5410  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5411  * @sdev: Pointer to scsi_device.
5412  *
5413  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5414  * globally available list of scsi buffers. This routine also makes sure scsi
5415  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5416  * of scsi buffer exists for the lifetime of the driver.
5417  *
5418  * Return codes:
5419  *   non-0 - Error
5420  *   0 - Success
5421  **/
5422 static int
5423 lpfc_slave_alloc(struct scsi_device *sdev)
5424 {
5425         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5426         struct lpfc_hba   *phba = vport->phba;
5427         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5428         uint32_t total = 0;
5429         uint32_t num_to_alloc = 0;
5430         int num_allocated = 0;
5431         uint32_t sdev_cnt;
5432         struct lpfc_device_data *device_data;
5433         unsigned long flags;
5434         struct lpfc_name target_wwpn;
5435
5436         if (!rport || fc_remote_port_chkready(rport))
5437                 return -ENXIO;
5438
5439         if (phba->cfg_fof) {
5440
5441                 /*
5442                  * Check to see if the device data structure for the lun
5443                  * exists.  If not, create one.
5444                  */
5445
5446                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5447                 spin_lock_irqsave(&phba->devicelock, flags);
5448                 device_data = __lpfc_get_device_data(phba,
5449                                                      &phba->luns,
5450                                                      &vport->fc_portname,
5451                                                      &target_wwpn,
5452                                                      sdev->lun);
5453                 if (!device_data) {
5454                         spin_unlock_irqrestore(&phba->devicelock, flags);
5455                         device_data = lpfc_create_device_data(phba,
5456                                                         &vport->fc_portname,
5457                                                         &target_wwpn,
5458                                                         sdev->lun, true);
5459                         if (!device_data)
5460                                 return -ENOMEM;
5461                         spin_lock_irqsave(&phba->devicelock, flags);
5462                         list_add_tail(&device_data->listentry, &phba->luns);
5463                 }
5464                 device_data->rport_data = rport->dd_data;
5465                 device_data->available = true;
5466                 spin_unlock_irqrestore(&phba->devicelock, flags);
5467                 sdev->hostdata = device_data;
5468         } else {
5469                 sdev->hostdata = rport->dd_data;
5470         }
5471         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5472
5473         /*
5474          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5475          * available list of scsi buffers.  Don't allocate more than the
5476          * HBA limit conveyed to the midlayer via the host structure.  The
5477          * formula accounts for the lun_queue_depth + error handlers + 1
5478          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5479          */
5480         total = phba->total_scsi_bufs;
5481         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5482
5483         /* If allocated buffers are enough do nothing */
5484         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5485                 return 0;
5486
5487         /* Allow some exchanges to be available always to complete discovery */
5488         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5489                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5490                                  "0704 At limitation of %d preallocated "
5491                                  "command buffers\n", total);
5492                 return 0;
5493         /* Allow some exchanges to be available always to complete discovery */
5494         } else if (total + num_to_alloc >
5495                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5496                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5497                                  "0705 Allocation request of %d "
5498                                  "command buffers will exceed max of %d.  "
5499                                  "Reducing allocation request to %d.\n",
5500                                  num_to_alloc, phba->cfg_hba_queue_depth,
5501                                  (phba->cfg_hba_queue_depth - total));
5502                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5503         }
5504         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5505         if (num_to_alloc != num_allocated) {
5506                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5507                                          "0708 Allocation request of %d "
5508                                          "command buffers did not succeed.  "
5509                                          "Allocated %d buffers.\n",
5510                                          num_to_alloc, num_allocated);
5511         }
5512         if (num_allocated > 0)
5513                 phba->total_scsi_bufs += num_allocated;
5514         return 0;
5515 }
5516
5517 /**
5518  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5519  * @sdev: Pointer to scsi_device.
5520  *
5521  * This routine configures following items
5522  *   - Tag command queuing support for @sdev if supported.
5523  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5524  *
5525  * Return codes:
5526  *   0 - Success
5527  **/
5528 static int
5529 lpfc_slave_configure(struct scsi_device *sdev)
5530 {
5531         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5532         struct lpfc_hba   *phba = vport->phba;
5533
5534         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5535
5536         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5537                 lpfc_sli_handle_fast_ring_event(phba,
5538                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5539                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5540                         lpfc_poll_rearm_timer(phba);
5541         }
5542
5543         return 0;
5544 }
5545
5546 /**
5547  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5548  * @sdev: Pointer to scsi_device.
5549  *
5550  * This routine sets @sdev hostatdata filed to null.
5551  **/
5552 static void
5553 lpfc_slave_destroy(struct scsi_device *sdev)
5554 {
5555         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5556         struct lpfc_hba   *phba = vport->phba;
5557         unsigned long flags;
5558         struct lpfc_device_data *device_data = sdev->hostdata;
5559
5560         atomic_dec(&phba->sdev_cnt);
5561         if ((phba->cfg_fof) && (device_data)) {
5562                 spin_lock_irqsave(&phba->devicelock, flags);
5563                 device_data->available = false;
5564                 if (!device_data->oas_enabled)
5565                         lpfc_delete_device_data(phba, device_data);
5566                 spin_unlock_irqrestore(&phba->devicelock, flags);
5567         }
5568         sdev->hostdata = NULL;
5569         return;
5570 }
5571
5572 /**
5573  * lpfc_create_device_data - creates and initializes device data structure for OAS
5574  * @pha: Pointer to host bus adapter structure.
5575  * @vport_wwpn: Pointer to vport's wwpn information
5576  * @target_wwpn: Pointer to target's wwpn information
5577  * @lun: Lun on target
5578  * @atomic_create: Flag to indicate if memory should be allocated using the
5579  *                GFP_ATOMIC flag or not.
5580  *
5581  * This routine creates a device data structure which will contain identifying
5582  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5583  * whether or not the corresponding lun is available by the system,
5584  * and pointer to the rport data.
5585  *
5586  * Return codes:
5587  *   NULL - Error
5588  *   Pointer to lpfc_device_data - Success
5589  **/
5590 struct lpfc_device_data*
5591 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5592                         struct lpfc_name *target_wwpn, uint64_t lun,
5593                         bool atomic_create)
5594 {
5595
5596         struct lpfc_device_data *lun_info;
5597         int memory_flags;
5598
5599         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5600             !(phba->cfg_fof))
5601                 return NULL;
5602
5603         /* Attempt to create the device data to contain lun info */
5604
5605         if (atomic_create)
5606                 memory_flags = GFP_ATOMIC;
5607         else
5608                 memory_flags = GFP_KERNEL;
5609         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5610         if (!lun_info)
5611                 return NULL;
5612         INIT_LIST_HEAD(&lun_info->listentry);
5613         lun_info->rport_data  = NULL;
5614         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5615                sizeof(struct lpfc_name));
5616         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5617                sizeof(struct lpfc_name));
5618         lun_info->device_id.lun = lun;
5619         lun_info->oas_enabled = false;
5620         lun_info->available = false;
5621         return lun_info;
5622 }
5623
5624 /**
5625  * lpfc_delete_device_data - frees a device data structure for OAS
5626  * @pha: Pointer to host bus adapter structure.
5627  * @lun_info: Pointer to device data structure to free.
5628  *
5629  * This routine frees the previously allocated device data structure passed.
5630  *
5631  **/
5632 void
5633 lpfc_delete_device_data(struct lpfc_hba *phba,
5634                         struct lpfc_device_data *lun_info)
5635 {
5636
5637         if (unlikely(!phba) || !lun_info  ||
5638             !(phba->cfg_fof))
5639                 return;
5640
5641         if (!list_empty(&lun_info->listentry))
5642                 list_del(&lun_info->listentry);
5643         mempool_free(lun_info, phba->device_data_mem_pool);
5644         return;
5645 }
5646
5647 /**
5648  * __lpfc_get_device_data - returns the device data for the specified lun
5649  * @pha: Pointer to host bus adapter structure.
5650  * @list: Point to list to search.
5651  * @vport_wwpn: Pointer to vport's wwpn information
5652  * @target_wwpn: Pointer to target's wwpn information
5653  * @lun: Lun on target
5654  *
5655  * This routine searches the list passed for the specified lun's device data.
5656  * This function does not hold locks, it is the responsibility of the caller
5657  * to ensure the proper lock is held before calling the function.
5658  *
5659  * Return codes:
5660  *   NULL - Error
5661  *   Pointer to lpfc_device_data - Success
5662  **/
5663 struct lpfc_device_data*
5664 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5665                        struct lpfc_name *vport_wwpn,
5666                        struct lpfc_name *target_wwpn, uint64_t lun)
5667 {
5668
5669         struct lpfc_device_data *lun_info;
5670
5671         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5672             !phba->cfg_fof)
5673                 return NULL;
5674
5675         /* Check to see if the lun is already enabled for OAS. */
5676
5677         list_for_each_entry(lun_info, list, listentry) {
5678                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5679                             sizeof(struct lpfc_name)) == 0) &&
5680                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5681                             sizeof(struct lpfc_name)) == 0) &&
5682                     (lun_info->device_id.lun == lun))
5683                         return lun_info;
5684         }
5685
5686         return NULL;
5687 }
5688
5689 /**
5690  * lpfc_find_next_oas_lun - searches for the next oas lun
5691  * @pha: Pointer to host bus adapter structure.
5692  * @vport_wwpn: Pointer to vport's wwpn information
5693  * @target_wwpn: Pointer to target's wwpn information
5694  * @starting_lun: Pointer to the lun to start searching for
5695  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5696  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5697  * @found_lun: Pointer to the found lun.
5698  * @found_lun_status: Pointer to status of the found lun.
5699  *
5700  * This routine searches the luns list for the specified lun
5701  * or the first lun for the vport/target.  If the vport wwpn contains
5702  * a zero value then a specific vport is not specified. In this case
5703  * any vport which contains the lun will be considered a match.  If the
5704  * target wwpn contains a zero value then a specific target is not specified.
5705  * In this case any target which contains the lun will be considered a
5706  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5707  * are returned.  The function will also return the next lun if available.
5708  * If the next lun is not found, starting_lun parameter will be set to
5709  * NO_MORE_OAS_LUN.
5710  *
5711  * Return codes:
5712  *   non-0 - Error
5713  *   0 - Success
5714  **/
5715 bool
5716 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5717                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5718                        struct lpfc_name *found_vport_wwpn,
5719                        struct lpfc_name *found_target_wwpn,
5720                        uint64_t *found_lun,
5721                        uint32_t *found_lun_status)
5722 {
5723
5724         unsigned long flags;
5725         struct lpfc_device_data *lun_info;
5726         struct lpfc_device_id *device_id;
5727         uint64_t lun;
5728         bool found = false;
5729
5730         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5731             !starting_lun || !found_vport_wwpn ||
5732             !found_target_wwpn || !found_lun || !found_lun_status ||
5733             (*starting_lun == NO_MORE_OAS_LUN) ||
5734             !phba->cfg_fof)
5735                 return false;
5736
5737         lun = *starting_lun;
5738         *found_lun = NO_MORE_OAS_LUN;
5739         *starting_lun = NO_MORE_OAS_LUN;
5740
5741         /* Search for lun or the lun closet in value */
5742
5743         spin_lock_irqsave(&phba->devicelock, flags);
5744         list_for_each_entry(lun_info, &phba->luns, listentry) {
5745                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5746                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5747                             sizeof(struct lpfc_name)) == 0)) &&
5748                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5749                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5750                             sizeof(struct lpfc_name)) == 0)) &&
5751                     (lun_info->oas_enabled)) {
5752                         device_id = &lun_info->device_id;
5753                         if ((!found) &&
5754                             ((lun == FIND_FIRST_OAS_LUN) ||
5755                              (device_id->lun == lun))) {
5756                                 *found_lun = device_id->lun;
5757                                 memcpy(found_vport_wwpn,
5758                                        &device_id->vport_wwpn,
5759                                        sizeof(struct lpfc_name));
5760                                 memcpy(found_target_wwpn,
5761                                        &device_id->target_wwpn,
5762                                        sizeof(struct lpfc_name));
5763                                 if (lun_info->available)
5764                                         *found_lun_status =
5765                                                 OAS_LUN_STATUS_EXISTS;
5766                                 else
5767                                         *found_lun_status = 0;
5768                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5769                                         memset(vport_wwpn, 0x0,
5770                                                sizeof(struct lpfc_name));
5771                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5772                                         memset(target_wwpn, 0x0,
5773                                                sizeof(struct lpfc_name));
5774                                 found = true;
5775                         } else if (found) {
5776                                 *starting_lun = device_id->lun;
5777                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5778                                        sizeof(struct lpfc_name));
5779                                 memcpy(target_wwpn, &device_id->target_wwpn,
5780                                        sizeof(struct lpfc_name));
5781                                 break;
5782                         }
5783                 }
5784         }
5785         spin_unlock_irqrestore(&phba->devicelock, flags);
5786         return found;
5787 }
5788
5789 /**
5790  * lpfc_enable_oas_lun - enables a lun for OAS operations
5791  * @pha: Pointer to host bus adapter structure.
5792  * @vport_wwpn: Pointer to vport's wwpn information
5793  * @target_wwpn: Pointer to target's wwpn information
5794  * @lun: Lun
5795  *
5796  * This routine enables a lun for oas operations.  The routines does so by
5797  * doing the following :
5798  *
5799  *   1) Checks to see if the device data for the lun has been created.
5800  *   2) If found, sets the OAS enabled flag if not set and returns.
5801  *   3) Otherwise, creates a device data structure.
5802  *   4) If successfully created, indicates the device data is for an OAS lun,
5803  *   indicates the lun is not available and add to the list of luns.
5804  *
5805  * Return codes:
5806  *   false - Error
5807  *   true - Success
5808  **/
5809 bool
5810 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5811                     struct lpfc_name *target_wwpn, uint64_t lun)
5812 {
5813
5814         struct lpfc_device_data *lun_info;
5815         unsigned long flags;
5816
5817         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5818             !phba->cfg_fof)
5819                 return false;
5820
5821         spin_lock_irqsave(&phba->devicelock, flags);
5822
5823         /* Check to see if the device data for the lun has been created */
5824         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5825                                           target_wwpn, lun);
5826         if (lun_info) {
5827                 if (!lun_info->oas_enabled)
5828                         lun_info->oas_enabled = true;
5829                 spin_unlock_irqrestore(&phba->devicelock, flags);
5830                 return true;
5831         }
5832
5833         /* Create an lun info structure and add to list of luns */
5834         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5835                                            false);
5836         if (lun_info) {
5837                 lun_info->oas_enabled = true;
5838                 lun_info->available = false;
5839                 list_add_tail(&lun_info->listentry, &phba->luns);
5840                 spin_unlock_irqrestore(&phba->devicelock, flags);
5841                 return true;
5842         }
5843         spin_unlock_irqrestore(&phba->devicelock, flags);
5844         return false;
5845 }
5846
5847 /**
5848  * lpfc_disable_oas_lun - disables a lun for OAS operations
5849  * @pha: Pointer to host bus adapter structure.
5850  * @vport_wwpn: Pointer to vport's wwpn information
5851  * @target_wwpn: Pointer to target's wwpn information
5852  * @lun: Lun
5853  *
5854  * This routine disables a lun for oas operations.  The routines does so by
5855  * doing the following :
5856  *
5857  *   1) Checks to see if the device data for the lun is created.
5858  *   2) If present, clears the flag indicating this lun is for OAS.
5859  *   3) If the lun is not available by the system, the device data is
5860  *   freed.
5861  *
5862  * Return codes:
5863  *   false - Error
5864  *   true - Success
5865  **/
5866 bool
5867 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5868                      struct lpfc_name *target_wwpn, uint64_t lun)
5869 {
5870
5871         struct lpfc_device_data *lun_info;
5872         unsigned long flags;
5873
5874         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5875             !phba->cfg_fof)
5876                 return false;
5877
5878         spin_lock_irqsave(&phba->devicelock, flags);
5879
5880         /* Check to see if the lun is available. */
5881         lun_info = __lpfc_get_device_data(phba,
5882                                           &phba->luns, vport_wwpn,
5883                                           target_wwpn, lun);
5884         if (lun_info) {
5885                 lun_info->oas_enabled = false;
5886                 if (!lun_info->available)
5887                         lpfc_delete_device_data(phba, lun_info);
5888                 spin_unlock_irqrestore(&phba->devicelock, flags);
5889                 return true;
5890         }
5891
5892         spin_unlock_irqrestore(&phba->devicelock, flags);
5893         return false;
5894 }
5895
5896 struct scsi_host_template lpfc_template_s3 = {
5897         .module                 = THIS_MODULE,
5898         .name                   = LPFC_DRIVER_NAME,
5899         .info                   = lpfc_info,
5900         .queuecommand           = lpfc_queuecommand,
5901         .eh_abort_handler       = lpfc_abort_handler,
5902         .eh_device_reset_handler = lpfc_device_reset_handler,
5903         .eh_target_reset_handler = lpfc_target_reset_handler,
5904         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5905         .slave_alloc            = lpfc_slave_alloc,
5906         .slave_configure        = lpfc_slave_configure,
5907         .slave_destroy          = lpfc_slave_destroy,
5908         .scan_finished          = lpfc_scan_finished,
5909         .this_id                = -1,
5910         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5911         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5912         .use_clustering         = ENABLE_CLUSTERING,
5913         .shost_attrs            = lpfc_hba_attrs,
5914         .max_sectors            = 0xFFFF,
5915         .vendor_id              = LPFC_NL_VENDOR_ID,
5916         .change_queue_depth     = scsi_change_queue_depth,
5917         .track_queue_depth      = 1,
5918 };
5919
5920 struct scsi_host_template lpfc_template = {
5921         .module                 = THIS_MODULE,
5922         .name                   = LPFC_DRIVER_NAME,
5923         .info                   = lpfc_info,
5924         .queuecommand           = lpfc_queuecommand,
5925         .eh_abort_handler       = lpfc_abort_handler,
5926         .eh_device_reset_handler = lpfc_device_reset_handler,
5927         .eh_target_reset_handler = lpfc_target_reset_handler,
5928         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5929         .eh_host_reset_handler  = lpfc_host_reset_handler,
5930         .slave_alloc            = lpfc_slave_alloc,
5931         .slave_configure        = lpfc_slave_configure,
5932         .slave_destroy          = lpfc_slave_destroy,
5933         .scan_finished          = lpfc_scan_finished,
5934         .this_id                = -1,
5935         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5936         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5937         .use_clustering         = ENABLE_CLUSTERING,
5938         .shost_attrs            = lpfc_hba_attrs,
5939         .max_sectors            = 0xFFFF,
5940         .vendor_id              = LPFC_NL_VENDOR_ID,
5941         .change_queue_depth     = scsi_change_queue_depth,
5942         .track_queue_depth      = 1,
5943 };
5944
5945 struct scsi_host_template lpfc_vport_template = {
5946         .module                 = THIS_MODULE,
5947         .name                   = LPFC_DRIVER_NAME,
5948         .info                   = lpfc_info,
5949         .queuecommand           = lpfc_queuecommand,
5950         .eh_abort_handler       = lpfc_abort_handler,
5951         .eh_device_reset_handler = lpfc_device_reset_handler,
5952         .eh_target_reset_handler = lpfc_target_reset_handler,
5953         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5954         .slave_alloc            = lpfc_slave_alloc,
5955         .slave_configure        = lpfc_slave_configure,
5956         .slave_destroy          = lpfc_slave_destroy,
5957         .scan_finished          = lpfc_scan_finished,
5958         .this_id                = -1,
5959         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5960         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5961         .use_clustering         = ENABLE_CLUSTERING,
5962         .shost_attrs            = lpfc_vport_attrs,
5963         .max_sectors            = 0xFFFF,
5964         .change_queue_depth     = scsi_change_queue_depth,
5965         .track_queue_depth      = 1,
5966 };