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_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
1134  * @data: A pointer to the immediate command data portion of the IOCB.
1135  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
1136  *
1137  * The routine copies the entire FCP command from @fcp_cmnd to @data while
1138  * byte swapping the data to big endian format for transmission on the wire.
1139  **/
1140 static void
1141 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
1142 {
1143         int i, j;
1144
1145         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
1146              i += sizeof(uint32_t), j++) {
1147                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
1148         }
1149 }
1150
1151 /**
1152  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1153  * @phba: The Hba for which this call is being executed.
1154  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1155  *
1156  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1157  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1158  * through sg elements and format the bdea. This routine also initializes all
1159  * IOCB fields which are dependent on scsi command request buffer.
1160  *
1161  * Return codes:
1162  *   1 - Error
1163  *   0 - Success
1164  **/
1165 static int
1166 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1167 {
1168         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1169         struct scatterlist *sgel = NULL;
1170         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1171         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1172         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1173         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1174         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1175         dma_addr_t physaddr;
1176         uint32_t num_bde = 0;
1177         int nseg, datadir = scsi_cmnd->sc_data_direction;
1178
1179         /*
1180          * There are three possibilities here - use scatter-gather segment, use
1181          * the single mapping, or neither.  Start the lpfc command prep by
1182          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1183          * data bde entry.
1184          */
1185         bpl += 2;
1186         if (scsi_sg_count(scsi_cmnd)) {
1187                 /*
1188                  * The driver stores the segment count returned from pci_map_sg
1189                  * because this a count of dma-mappings used to map the use_sg
1190                  * pages.  They are not guaranteed to be the same for those
1191                  * architectures that implement an IOMMU.
1192                  */
1193
1194                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1195                                   scsi_sg_count(scsi_cmnd), datadir);
1196                 if (unlikely(!nseg))
1197                         return 1;
1198
1199                 lpfc_cmd->seg_cnt = nseg;
1200                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1201                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1202                                 "9064 BLKGRD: %s: Too many sg segments from "
1203                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1204                                __func__, phba->cfg_sg_seg_cnt,
1205                                lpfc_cmd->seg_cnt);
1206                         lpfc_cmd->seg_cnt = 0;
1207                         scsi_dma_unmap(scsi_cmnd);
1208                         return 1;
1209                 }
1210
1211                 /*
1212                  * The driver established a maximum scatter-gather segment count
1213                  * during probe that limits the number of sg elements in any
1214                  * single scsi command.  Just run through the seg_cnt and format
1215                  * the bde's.
1216                  * When using SLI-3 the driver will try to fit all the BDEs into
1217                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1218                  * does for SLI-2 mode.
1219                  */
1220                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1221                         physaddr = sg_dma_address(sgel);
1222                         if (phba->sli_rev == 3 &&
1223                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1224                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1225                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1226                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1227                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1228                                 data_bde->addrLow = putPaddrLow(physaddr);
1229                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1230                                 data_bde++;
1231                         } else {
1232                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1233                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1234                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1235                                 bpl->addrLow =
1236                                         le32_to_cpu(putPaddrLow(physaddr));
1237                                 bpl->addrHigh =
1238                                         le32_to_cpu(putPaddrHigh(physaddr));
1239                                 bpl++;
1240                         }
1241                 }
1242         }
1243
1244         /*
1245          * Finish initializing those IOCB fields that are dependent on the
1246          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1247          * explicitly reinitialized and for SLI-3 the extended bde count is
1248          * explicitly reinitialized since all iocb memory resources are reused.
1249          */
1250         if (phba->sli_rev == 3 &&
1251             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1252             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1253                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1254                         /*
1255                          * The extended IOCB format can only fit 3 BDE or a BPL.
1256                          * This I/O has more than 3 BDE so the 1st data bde will
1257                          * be a BPL that is filled in here.
1258                          */
1259                         physaddr = lpfc_cmd->dma_handle;
1260                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1261                         data_bde->tus.f.bdeSize = (num_bde *
1262                                                    sizeof(struct ulp_bde64));
1263                         physaddr += (sizeof(struct fcp_cmnd) +
1264                                      sizeof(struct fcp_rsp) +
1265                                      (2 * sizeof(struct ulp_bde64)));
1266                         data_bde->addrHigh = putPaddrHigh(physaddr);
1267                         data_bde->addrLow = putPaddrLow(physaddr);
1268                         /* ebde count includes the response bde and data bpl */
1269                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1270                 } else {
1271                         /* ebde count includes the response bde and data bdes */
1272                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1273                 }
1274         } else {
1275                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1276                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1277                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1278         }
1279         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1280
1281         /*
1282          * Due to difference in data length between DIF/non-DIF paths,
1283          * we need to set word 4 of IOCB here
1284          */
1285         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1286         lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
1287         return 0;
1288 }
1289
1290 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1291
1292 /* Return if if error injection is detected by Initiator */
1293 #define BG_ERR_INIT     0x1
1294 /* Return if if error injection is detected by Target */
1295 #define BG_ERR_TGT      0x2
1296 /* Return if if swapping CSUM<-->CRC is required for error injection */
1297 #define BG_ERR_SWAP     0x10
1298 /* Return if disabling Guard/Ref/App checking is required for error injection */
1299 #define BG_ERR_CHECK    0x20
1300
1301 /**
1302  * lpfc_bg_err_inject - Determine if we should inject an error
1303  * @phba: The Hba for which this call is being executed.
1304  * @sc: The SCSI command to examine
1305  * @reftag: (out) BlockGuard reference tag for transmitted data
1306  * @apptag: (out) BlockGuard application tag for transmitted data
1307  * @new_guard (in) Value to replace CRC with if needed
1308  *
1309  * Returns BG_ERR_* bit mask or 0 if request ignored
1310  **/
1311 static int
1312 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1313                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1314 {
1315         struct scatterlist *sgpe; /* s/g prot entry */
1316         struct scatterlist *sgde; /* s/g data entry */
1317         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1318         struct scsi_dif_tuple *src = NULL;
1319         struct lpfc_nodelist *ndlp;
1320         struct lpfc_rport_data *rdata;
1321         uint32_t op = scsi_get_prot_op(sc);
1322         uint32_t blksize;
1323         uint32_t numblks;
1324         sector_t lba;
1325         int rc = 0;
1326         int blockoff = 0;
1327
1328         if (op == SCSI_PROT_NORMAL)
1329                 return 0;
1330
1331         sgpe = scsi_prot_sglist(sc);
1332         sgde = scsi_sglist(sc);
1333         lba = scsi_get_lba(sc);
1334
1335         /* First check if we need to match the LBA */
1336         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1337                 blksize = lpfc_cmd_blksize(sc);
1338                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1339
1340                 /* Make sure we have the right LBA if one is specified */
1341                 if ((phba->lpfc_injerr_lba < lba) ||
1342                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1343                         return 0;
1344                 if (sgpe) {
1345                         blockoff = phba->lpfc_injerr_lba - lba;
1346                         numblks = sg_dma_len(sgpe) /
1347                                 sizeof(struct scsi_dif_tuple);
1348                         if (numblks < blockoff)
1349                                 blockoff = numblks;
1350                 }
1351         }
1352
1353         /* Next check if we need to match the remote NPortID or WWPN */
1354         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1355         if (rdata && rdata->pnode) {
1356                 ndlp = rdata->pnode;
1357
1358                 /* Make sure we have the right NPortID if one is specified */
1359                 if (phba->lpfc_injerr_nportid  &&
1360                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1361                         return 0;
1362
1363                 /*
1364                  * Make sure we have the right WWPN if one is specified.
1365                  * wwn[0] should be a non-zero NAA in a good WWPN.
1366                  */
1367                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1368                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1369                                 sizeof(struct lpfc_name)) != 0))
1370                         return 0;
1371         }
1372
1373         /* Setup a ptr to the protection data if the SCSI host provides it */
1374         if (sgpe) {
1375                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1376                 src += blockoff;
1377                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1378         }
1379
1380         /* Should we change the Reference Tag */
1381         if (reftag) {
1382                 if (phba->lpfc_injerr_wref_cnt) {
1383                         switch (op) {
1384                         case SCSI_PROT_WRITE_PASS:
1385                                 if (src) {
1386                                         /*
1387                                          * For WRITE_PASS, force the error
1388                                          * to be sent on the wire. It should
1389                                          * be detected by the Target.
1390                                          * If blockoff != 0 error will be
1391                                          * inserted in middle of the IO.
1392                                          */
1393
1394                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1395                                         "9076 BLKGRD: Injecting reftag error: "
1396                                         "write lba x%lx + x%x oldrefTag x%x\n",
1397                                         (unsigned long)lba, blockoff,
1398                                         be32_to_cpu(src->ref_tag));
1399
1400                                         /*
1401                                          * Save the old ref_tag so we can
1402                                          * restore it on completion.
1403                                          */
1404                                         if (lpfc_cmd) {
1405                                                 lpfc_cmd->prot_data_type =
1406                                                         LPFC_INJERR_REFTAG;
1407                                                 lpfc_cmd->prot_data_segment =
1408                                                         src;
1409                                                 lpfc_cmd->prot_data =
1410                                                         src->ref_tag;
1411                                         }
1412                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1413                                         phba->lpfc_injerr_wref_cnt--;
1414                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1415                                                 phba->lpfc_injerr_nportid = 0;
1416                                                 phba->lpfc_injerr_lba =
1417                                                         LPFC_INJERR_LBA_OFF;
1418                                                 memset(&phba->lpfc_injerr_wwpn,
1419                                                   0, sizeof(struct lpfc_name));
1420                                         }
1421                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1422
1423                                         break;
1424                                 }
1425                                 /* Drop thru */
1426                         case SCSI_PROT_WRITE_INSERT:
1427                                 /*
1428                                  * For WRITE_INSERT, force the error
1429                                  * to be sent on the wire. It should be
1430                                  * detected by the Target.
1431                                  */
1432                                 /* DEADBEEF will be the reftag on the wire */
1433                                 *reftag = 0xDEADBEEF;
1434                                 phba->lpfc_injerr_wref_cnt--;
1435                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1436                                         phba->lpfc_injerr_nportid = 0;
1437                                         phba->lpfc_injerr_lba =
1438                                         LPFC_INJERR_LBA_OFF;
1439                                         memset(&phba->lpfc_injerr_wwpn,
1440                                                 0, sizeof(struct lpfc_name));
1441                                 }
1442                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1443
1444                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1445                                         "9078 BLKGRD: Injecting reftag error: "
1446                                         "write lba x%lx\n", (unsigned long)lba);
1447                                 break;
1448                         case SCSI_PROT_WRITE_STRIP:
1449                                 /*
1450                                  * For WRITE_STRIP and WRITE_PASS,
1451                                  * force the error on data
1452                                  * being copied from SLI-Host to SLI-Port.
1453                                  */
1454                                 *reftag = 0xDEADBEEF;
1455                                 phba->lpfc_injerr_wref_cnt--;
1456                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1457                                         phba->lpfc_injerr_nportid = 0;
1458                                         phba->lpfc_injerr_lba =
1459                                                 LPFC_INJERR_LBA_OFF;
1460                                         memset(&phba->lpfc_injerr_wwpn,
1461                                                 0, sizeof(struct lpfc_name));
1462                                 }
1463                                 rc = BG_ERR_INIT;
1464
1465                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1466                                         "9077 BLKGRD: Injecting reftag error: "
1467                                         "write lba x%lx\n", (unsigned long)lba);
1468                                 break;
1469                         }
1470                 }
1471                 if (phba->lpfc_injerr_rref_cnt) {
1472                         switch (op) {
1473                         case SCSI_PROT_READ_INSERT:
1474                         case SCSI_PROT_READ_STRIP:
1475                         case SCSI_PROT_READ_PASS:
1476                                 /*
1477                                  * For READ_STRIP and READ_PASS, force the
1478                                  * error on data being read off the wire. It
1479                                  * should force an IO error to the driver.
1480                                  */
1481                                 *reftag = 0xDEADBEEF;
1482                                 phba->lpfc_injerr_rref_cnt--;
1483                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1484                                         phba->lpfc_injerr_nportid = 0;
1485                                         phba->lpfc_injerr_lba =
1486                                                 LPFC_INJERR_LBA_OFF;
1487                                         memset(&phba->lpfc_injerr_wwpn,
1488                                                 0, sizeof(struct lpfc_name));
1489                                 }
1490                                 rc = BG_ERR_INIT;
1491
1492                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1493                                         "9079 BLKGRD: Injecting reftag error: "
1494                                         "read lba x%lx\n", (unsigned long)lba);
1495                                 break;
1496                         }
1497                 }
1498         }
1499
1500         /* Should we change the Application Tag */
1501         if (apptag) {
1502                 if (phba->lpfc_injerr_wapp_cnt) {
1503                         switch (op) {
1504                         case SCSI_PROT_WRITE_PASS:
1505                                 if (src) {
1506                                         /*
1507                                          * For WRITE_PASS, force the error
1508                                          * to be sent on the wire. It should
1509                                          * be detected by the Target.
1510                                          * If blockoff != 0 error will be
1511                                          * inserted in middle of the IO.
1512                                          */
1513
1514                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1515                                         "9080 BLKGRD: Injecting apptag error: "
1516                                         "write lba x%lx + x%x oldappTag x%x\n",
1517                                         (unsigned long)lba, blockoff,
1518                                         be16_to_cpu(src->app_tag));
1519
1520                                         /*
1521                                          * Save the old app_tag so we can
1522                                          * restore it on completion.
1523                                          */
1524                                         if (lpfc_cmd) {
1525                                                 lpfc_cmd->prot_data_type =
1526                                                         LPFC_INJERR_APPTAG;
1527                                                 lpfc_cmd->prot_data_segment =
1528                                                         src;
1529                                                 lpfc_cmd->prot_data =
1530                                                         src->app_tag;
1531                                         }
1532                                         src->app_tag = cpu_to_be16(0xDEAD);
1533                                         phba->lpfc_injerr_wapp_cnt--;
1534                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1535                                                 phba->lpfc_injerr_nportid = 0;
1536                                                 phba->lpfc_injerr_lba =
1537                                                         LPFC_INJERR_LBA_OFF;
1538                                                 memset(&phba->lpfc_injerr_wwpn,
1539                                                   0, sizeof(struct lpfc_name));
1540                                         }
1541                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1542                                         break;
1543                                 }
1544                                 /* Drop thru */
1545                         case SCSI_PROT_WRITE_INSERT:
1546                                 /*
1547                                  * For WRITE_INSERT, force the
1548                                  * error to be sent on the wire. It should be
1549                                  * detected by the Target.
1550                                  */
1551                                 /* DEAD will be the apptag on the wire */
1552                                 *apptag = 0xDEAD;
1553                                 phba->lpfc_injerr_wapp_cnt--;
1554                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1555                                         phba->lpfc_injerr_nportid = 0;
1556                                         phba->lpfc_injerr_lba =
1557                                                 LPFC_INJERR_LBA_OFF;
1558                                         memset(&phba->lpfc_injerr_wwpn,
1559                                                 0, sizeof(struct lpfc_name));
1560                                 }
1561                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1562
1563                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1564                                         "0813 BLKGRD: Injecting apptag error: "
1565                                         "write lba x%lx\n", (unsigned long)lba);
1566                                 break;
1567                         case SCSI_PROT_WRITE_STRIP:
1568                                 /*
1569                                  * For WRITE_STRIP and WRITE_PASS,
1570                                  * force the error on data
1571                                  * being copied from SLI-Host to SLI-Port.
1572                                  */
1573                                 *apptag = 0xDEAD;
1574                                 phba->lpfc_injerr_wapp_cnt--;
1575                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1576                                         phba->lpfc_injerr_nportid = 0;
1577                                         phba->lpfc_injerr_lba =
1578                                                 LPFC_INJERR_LBA_OFF;
1579                                         memset(&phba->lpfc_injerr_wwpn,
1580                                                 0, sizeof(struct lpfc_name));
1581                                 }
1582                                 rc = BG_ERR_INIT;
1583
1584                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1585                                         "0812 BLKGRD: Injecting apptag error: "
1586                                         "write lba x%lx\n", (unsigned long)lba);
1587                                 break;
1588                         }
1589                 }
1590                 if (phba->lpfc_injerr_rapp_cnt) {
1591                         switch (op) {
1592                         case SCSI_PROT_READ_INSERT:
1593                         case SCSI_PROT_READ_STRIP:
1594                         case SCSI_PROT_READ_PASS:
1595                                 /*
1596                                  * For READ_STRIP and READ_PASS, force the
1597                                  * error on data being read off the wire. It
1598                                  * should force an IO error to the driver.
1599                                  */
1600                                 *apptag = 0xDEAD;
1601                                 phba->lpfc_injerr_rapp_cnt--;
1602                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1603                                         phba->lpfc_injerr_nportid = 0;
1604                                         phba->lpfc_injerr_lba =
1605                                                 LPFC_INJERR_LBA_OFF;
1606                                         memset(&phba->lpfc_injerr_wwpn,
1607                                                 0, sizeof(struct lpfc_name));
1608                                 }
1609                                 rc = BG_ERR_INIT;
1610
1611                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1612                                         "0814 BLKGRD: Injecting apptag error: "
1613                                         "read lba x%lx\n", (unsigned long)lba);
1614                                 break;
1615                         }
1616                 }
1617         }
1618
1619
1620         /* Should we change the Guard Tag */
1621         if (new_guard) {
1622                 if (phba->lpfc_injerr_wgrd_cnt) {
1623                         switch (op) {
1624                         case SCSI_PROT_WRITE_PASS:
1625                                 rc = BG_ERR_CHECK;
1626                                 /* Drop thru */
1627
1628                         case SCSI_PROT_WRITE_INSERT:
1629                                 /*
1630                                  * For WRITE_INSERT, force the
1631                                  * error to be sent on the wire. It should be
1632                                  * detected by the Target.
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_TGT | BG_ERR_SWAP;
1644                                 /* Signals the caller to swap CRC->CSUM */
1645
1646                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1647                                         "0817 BLKGRD: Injecting guard error: "
1648                                         "write lba x%lx\n", (unsigned long)lba);
1649                                 break;
1650                         case SCSI_PROT_WRITE_STRIP:
1651                                 /*
1652                                  * For WRITE_STRIP and WRITE_PASS,
1653                                  * force the error on data
1654                                  * being copied from SLI-Host to SLI-Port.
1655                                  */
1656                                 phba->lpfc_injerr_wgrd_cnt--;
1657                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1658                                         phba->lpfc_injerr_nportid = 0;
1659                                         phba->lpfc_injerr_lba =
1660                                                 LPFC_INJERR_LBA_OFF;
1661                                         memset(&phba->lpfc_injerr_wwpn,
1662                                                 0, sizeof(struct lpfc_name));
1663                                 }
1664
1665                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1666                                 /* Signals the caller to swap CRC->CSUM */
1667
1668                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1669                                         "0816 BLKGRD: Injecting guard error: "
1670                                         "write lba x%lx\n", (unsigned long)lba);
1671                                 break;
1672                         }
1673                 }
1674                 if (phba->lpfc_injerr_rgrd_cnt) {
1675                         switch (op) {
1676                         case SCSI_PROT_READ_INSERT:
1677                         case SCSI_PROT_READ_STRIP:
1678                         case SCSI_PROT_READ_PASS:
1679                                 /*
1680                                  * For READ_STRIP and READ_PASS, force the
1681                                  * error on data being read off the wire. It
1682                                  * should force an IO error to the driver.
1683                                  */
1684                                 phba->lpfc_injerr_rgrd_cnt--;
1685                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1686                                         phba->lpfc_injerr_nportid = 0;
1687                                         phba->lpfc_injerr_lba =
1688                                                 LPFC_INJERR_LBA_OFF;
1689                                         memset(&phba->lpfc_injerr_wwpn,
1690                                                 0, sizeof(struct lpfc_name));
1691                                 }
1692
1693                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1694                                 /* Signals the caller to swap CRC->CSUM */
1695
1696                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1697                                         "0818 BLKGRD: Injecting guard error: "
1698                                         "read lba x%lx\n", (unsigned long)lba);
1699                         }
1700                 }
1701         }
1702
1703         return rc;
1704 }
1705 #endif
1706
1707 /**
1708  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1709  * the specified SCSI command.
1710  * @phba: The Hba for which this call is being executed.
1711  * @sc: The SCSI command to examine
1712  * @txopt: (out) BlockGuard operation for transmitted data
1713  * @rxopt: (out) BlockGuard operation for received data
1714  *
1715  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1716  *
1717  **/
1718 static int
1719 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1720                 uint8_t *txop, uint8_t *rxop)
1721 {
1722         uint8_t ret = 0;
1723
1724         if (lpfc_cmd_guard_csum(sc)) {
1725                 switch (scsi_get_prot_op(sc)) {
1726                 case SCSI_PROT_READ_INSERT:
1727                 case SCSI_PROT_WRITE_STRIP:
1728                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1729                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1730                         break;
1731
1732                 case SCSI_PROT_READ_STRIP:
1733                 case SCSI_PROT_WRITE_INSERT:
1734                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1735                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1736                         break;
1737
1738                 case SCSI_PROT_READ_PASS:
1739                 case SCSI_PROT_WRITE_PASS:
1740                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1741                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1742                         break;
1743
1744                 case SCSI_PROT_NORMAL:
1745                 default:
1746                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1747                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1748                                         scsi_get_prot_op(sc));
1749                         ret = 1;
1750                         break;
1751
1752                 }
1753         } else {
1754                 switch (scsi_get_prot_op(sc)) {
1755                 case SCSI_PROT_READ_STRIP:
1756                 case SCSI_PROT_WRITE_INSERT:
1757                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1758                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1759                         break;
1760
1761                 case SCSI_PROT_READ_PASS:
1762                 case SCSI_PROT_WRITE_PASS:
1763                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1764                         *txop = BG_OP_IN_CRC_OUT_CRC;
1765                         break;
1766
1767                 case SCSI_PROT_READ_INSERT:
1768                 case SCSI_PROT_WRITE_STRIP:
1769                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1770                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1771                         break;
1772
1773                 case SCSI_PROT_NORMAL:
1774                 default:
1775                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1776                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1777                                         scsi_get_prot_op(sc));
1778                         ret = 1;
1779                         break;
1780                 }
1781         }
1782
1783         return ret;
1784 }
1785
1786 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1787 /**
1788  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1789  * the specified SCSI command in order to force a guard tag error.
1790  * @phba: The Hba for which this call is being executed.
1791  * @sc: The SCSI command to examine
1792  * @txopt: (out) BlockGuard operation for transmitted data
1793  * @rxopt: (out) BlockGuard operation for received data
1794  *
1795  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1796  *
1797  **/
1798 static int
1799 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1800                 uint8_t *txop, uint8_t *rxop)
1801 {
1802         uint8_t ret = 0;
1803
1804         if (lpfc_cmd_guard_csum(sc)) {
1805                 switch (scsi_get_prot_op(sc)) {
1806                 case SCSI_PROT_READ_INSERT:
1807                 case SCSI_PROT_WRITE_STRIP:
1808                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1809                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1810                         break;
1811
1812                 case SCSI_PROT_READ_STRIP:
1813                 case SCSI_PROT_WRITE_INSERT:
1814                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1815                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1816                         break;
1817
1818                 case SCSI_PROT_READ_PASS:
1819                 case SCSI_PROT_WRITE_PASS:
1820                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1821                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1822                         break;
1823
1824                 case SCSI_PROT_NORMAL:
1825                 default:
1826                         break;
1827
1828                 }
1829         } else {
1830                 switch (scsi_get_prot_op(sc)) {
1831                 case SCSI_PROT_READ_STRIP:
1832                 case SCSI_PROT_WRITE_INSERT:
1833                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1834                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1835                         break;
1836
1837                 case SCSI_PROT_READ_PASS:
1838                 case SCSI_PROT_WRITE_PASS:
1839                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1840                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1841                         break;
1842
1843                 case SCSI_PROT_READ_INSERT:
1844                 case SCSI_PROT_WRITE_STRIP:
1845                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1846                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1847                         break;
1848
1849                 case SCSI_PROT_NORMAL:
1850                 default:
1851                         break;
1852                 }
1853         }
1854
1855         return ret;
1856 }
1857 #endif
1858
1859 /**
1860  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1861  * @phba: The Hba for which this call is being executed.
1862  * @sc: pointer to scsi command we're working on
1863  * @bpl: pointer to buffer list for protection groups
1864  * @datacnt: number of segments of data that have been dma mapped
1865  *
1866  * This function sets up BPL buffer list for protection groups of
1867  * type LPFC_PG_TYPE_NO_DIF
1868  *
1869  * This is usually used when the HBA is instructed to generate
1870  * DIFs and insert them into data stream (or strip DIF from
1871  * incoming data stream)
1872  *
1873  * The buffer list consists of just one protection group described
1874  * below:
1875  *                                +-------------------------+
1876  *   start of prot group  -->     |          PDE_5          |
1877  *                                +-------------------------+
1878  *                                |          PDE_6          |
1879  *                                +-------------------------+
1880  *                                |         Data BDE        |
1881  *                                +-------------------------+
1882  *                                |more Data BDE's ... (opt)|
1883  *                                +-------------------------+
1884  *
1885  *
1886  * Note: Data s/g buffers have been dma mapped
1887  *
1888  * Returns the number of BDEs added to the BPL.
1889  **/
1890 static int
1891 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1892                 struct ulp_bde64 *bpl, int datasegcnt)
1893 {
1894         struct scatterlist *sgde = NULL; /* s/g data entry */
1895         struct lpfc_pde5 *pde5 = NULL;
1896         struct lpfc_pde6 *pde6 = NULL;
1897         dma_addr_t physaddr;
1898         int i = 0, num_bde = 0, status;
1899         int datadir = sc->sc_data_direction;
1900 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1901         uint32_t rc;
1902 #endif
1903         uint32_t checking = 1;
1904         uint32_t reftag;
1905         unsigned blksize;
1906         uint8_t txop, rxop;
1907
1908         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1909         if (status)
1910                 goto out;
1911
1912         /* extract some info from the scsi command for pde*/
1913         blksize = lpfc_cmd_blksize(sc);
1914         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1915
1916 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1917         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1918         if (rc) {
1919                 if (rc & BG_ERR_SWAP)
1920                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1921                 if (rc & BG_ERR_CHECK)
1922                         checking = 0;
1923         }
1924 #endif
1925
1926         /* setup PDE5 with what we have */
1927         pde5 = (struct lpfc_pde5 *) bpl;
1928         memset(pde5, 0, sizeof(struct lpfc_pde5));
1929         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1930
1931         /* Endianness conversion if necessary for PDE5 */
1932         pde5->word0 = cpu_to_le32(pde5->word0);
1933         pde5->reftag = cpu_to_le32(reftag);
1934
1935         /* advance bpl and increment bde count */
1936         num_bde++;
1937         bpl++;
1938         pde6 = (struct lpfc_pde6 *) bpl;
1939
1940         /* setup PDE6 with the rest of the info */
1941         memset(pde6, 0, sizeof(struct lpfc_pde6));
1942         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1943         bf_set(pde6_optx, pde6, txop);
1944         bf_set(pde6_oprx, pde6, rxop);
1945
1946         /*
1947          * We only need to check the data on READs, for WRITEs
1948          * protection data is automatically generated, not checked.
1949          */
1950         if (datadir == DMA_FROM_DEVICE) {
1951                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1952                         bf_set(pde6_ce, pde6, checking);
1953                 else
1954                         bf_set(pde6_ce, pde6, 0);
1955
1956                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1957                         bf_set(pde6_re, pde6, checking);
1958                 else
1959                         bf_set(pde6_re, pde6, 0);
1960         }
1961         bf_set(pde6_ai, pde6, 1);
1962         bf_set(pde6_ae, pde6, 0);
1963         bf_set(pde6_apptagval, pde6, 0);
1964
1965         /* Endianness conversion if necessary for PDE6 */
1966         pde6->word0 = cpu_to_le32(pde6->word0);
1967         pde6->word1 = cpu_to_le32(pde6->word1);
1968         pde6->word2 = cpu_to_le32(pde6->word2);
1969
1970         /* advance bpl and increment bde count */
1971         num_bde++;
1972         bpl++;
1973
1974         /* assumption: caller has already run dma_map_sg on command data */
1975         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1976                 physaddr = sg_dma_address(sgde);
1977                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1978                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1979                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1980                 if (datadir == DMA_TO_DEVICE)
1981                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1982                 else
1983                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1984                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1985                 bpl++;
1986                 num_bde++;
1987         }
1988
1989 out:
1990         return num_bde;
1991 }
1992
1993 /**
1994  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1995  * @phba: The Hba for which this call is being executed.
1996  * @sc: pointer to scsi command we're working on
1997  * @bpl: pointer to buffer list for protection groups
1998  * @datacnt: number of segments of data that have been dma mapped
1999  * @protcnt: number of segment of protection data that have been dma mapped
2000  *
2001  * This function sets up BPL buffer list for protection groups of
2002  * type LPFC_PG_TYPE_DIF
2003  *
2004  * This is usually used when DIFs are in their own buffers,
2005  * separate from the data. The HBA can then by instructed
2006  * to place the DIFs in the outgoing stream.  For read operations,
2007  * The HBA could extract the DIFs and place it in DIF buffers.
2008  *
2009  * The buffer list for this type consists of one or more of the
2010  * protection groups described below:
2011  *                                    +-------------------------+
2012  *   start of first prot group  -->   |          PDE_5          |
2013  *                                    +-------------------------+
2014  *                                    |          PDE_6          |
2015  *                                    +-------------------------+
2016  *                                    |      PDE_7 (Prot BDE)   |
2017  *                                    +-------------------------+
2018  *                                    |        Data BDE         |
2019  *                                    +-------------------------+
2020  *                                    |more Data BDE's ... (opt)|
2021  *                                    +-------------------------+
2022  *   start of new  prot group  -->    |          PDE_5          |
2023  *                                    +-------------------------+
2024  *                                    |          ...            |
2025  *                                    +-------------------------+
2026  *
2027  * Note: It is assumed that both data and protection s/g buffers have been
2028  *       mapped for DMA
2029  *
2030  * Returns the number of BDEs added to the BPL.
2031  **/
2032 static int
2033 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2034                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2035 {
2036         struct scatterlist *sgde = NULL; /* s/g data entry */
2037         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2038         struct lpfc_pde5 *pde5 = NULL;
2039         struct lpfc_pde6 *pde6 = NULL;
2040         struct lpfc_pde7 *pde7 = NULL;
2041         dma_addr_t dataphysaddr, protphysaddr;
2042         unsigned short curr_data = 0, curr_prot = 0;
2043         unsigned int split_offset;
2044         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2045         unsigned int protgrp_blks, protgrp_bytes;
2046         unsigned int remainder, subtotal;
2047         int status;
2048         int datadir = sc->sc_data_direction;
2049         unsigned char pgdone = 0, alldone = 0;
2050         unsigned blksize;
2051 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2052         uint32_t rc;
2053 #endif
2054         uint32_t checking = 1;
2055         uint32_t reftag;
2056         uint8_t txop, rxop;
2057         int num_bde = 0;
2058
2059         sgpe = scsi_prot_sglist(sc);
2060         sgde = scsi_sglist(sc);
2061
2062         if (!sgpe || !sgde) {
2063                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2064                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2065                                 sgpe, sgde);
2066                 return 0;
2067         }
2068
2069         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2070         if (status)
2071                 goto out;
2072
2073         /* extract some info from the scsi command */
2074         blksize = lpfc_cmd_blksize(sc);
2075         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2076
2077 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2078         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2079         if (rc) {
2080                 if (rc & BG_ERR_SWAP)
2081                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2082                 if (rc & BG_ERR_CHECK)
2083                         checking = 0;
2084         }
2085 #endif
2086
2087         split_offset = 0;
2088         do {
2089                 /* Check to see if we ran out of space */
2090                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2091                         return num_bde + 3;
2092
2093                 /* setup PDE5 with what we have */
2094                 pde5 = (struct lpfc_pde5 *) bpl;
2095                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2096                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2097
2098                 /* Endianness conversion if necessary for PDE5 */
2099                 pde5->word0 = cpu_to_le32(pde5->word0);
2100                 pde5->reftag = cpu_to_le32(reftag);
2101
2102                 /* advance bpl and increment bde count */
2103                 num_bde++;
2104                 bpl++;
2105                 pde6 = (struct lpfc_pde6 *) bpl;
2106
2107                 /* setup PDE6 with the rest of the info */
2108                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2109                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2110                 bf_set(pde6_optx, pde6, txop);
2111                 bf_set(pde6_oprx, pde6, rxop);
2112
2113                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2114                         bf_set(pde6_ce, pde6, checking);
2115                 else
2116                         bf_set(pde6_ce, pde6, 0);
2117
2118                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2119                         bf_set(pde6_re, pde6, checking);
2120                 else
2121                         bf_set(pde6_re, pde6, 0);
2122
2123                 bf_set(pde6_ai, pde6, 1);
2124                 bf_set(pde6_ae, pde6, 0);
2125                 bf_set(pde6_apptagval, pde6, 0);
2126
2127                 /* Endianness conversion if necessary for PDE6 */
2128                 pde6->word0 = cpu_to_le32(pde6->word0);
2129                 pde6->word1 = cpu_to_le32(pde6->word1);
2130                 pde6->word2 = cpu_to_le32(pde6->word2);
2131
2132                 /* advance bpl and increment bde count */
2133                 num_bde++;
2134                 bpl++;
2135
2136                 /* setup the first BDE that points to protection buffer */
2137                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2138                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2139
2140                 /* must be integer multiple of the DIF block length */
2141                 BUG_ON(protgroup_len % 8);
2142
2143                 pde7 = (struct lpfc_pde7 *) bpl;
2144                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2145                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2146
2147                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2148                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2149
2150                 protgrp_blks = protgroup_len / 8;
2151                 protgrp_bytes = protgrp_blks * blksize;
2152
2153                 /* check if this pde is crossing the 4K boundary; if so split */
2154                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2155                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2156                         protgroup_offset += protgroup_remainder;
2157                         protgrp_blks = protgroup_remainder / 8;
2158                         protgrp_bytes = protgrp_blks * blksize;
2159                 } else {
2160                         protgroup_offset = 0;
2161                         curr_prot++;
2162                 }
2163
2164                 num_bde++;
2165
2166                 /* setup BDE's for data blocks associated with DIF data */
2167                 pgdone = 0;
2168                 subtotal = 0; /* total bytes processed for current prot grp */
2169                 while (!pgdone) {
2170                         /* Check to see if we ran out of space */
2171                         if (num_bde >= phba->cfg_total_seg_cnt)
2172                                 return num_bde + 1;
2173
2174                         if (!sgde) {
2175                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2176                                         "9065 BLKGRD:%s Invalid data segment\n",
2177                                                 __func__);
2178                                 return 0;
2179                         }
2180                         bpl++;
2181                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2182                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2183                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2184
2185                         remainder = sg_dma_len(sgde) - split_offset;
2186
2187                         if ((subtotal + remainder) <= protgrp_bytes) {
2188                                 /* we can use this whole buffer */
2189                                 bpl->tus.f.bdeSize = remainder;
2190                                 split_offset = 0;
2191
2192                                 if ((subtotal + remainder) == protgrp_bytes)
2193                                         pgdone = 1;
2194                         } else {
2195                                 /* must split this buffer with next prot grp */
2196                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2197                                 split_offset += bpl->tus.f.bdeSize;
2198                         }
2199
2200                         subtotal += bpl->tus.f.bdeSize;
2201
2202                         if (datadir == DMA_TO_DEVICE)
2203                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2204                         else
2205                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2206                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2207
2208                         num_bde++;
2209                         curr_data++;
2210
2211                         if (split_offset)
2212                                 break;
2213
2214                         /* Move to the next s/g segment if possible */
2215                         sgde = sg_next(sgde);
2216
2217                 }
2218
2219                 if (protgroup_offset) {
2220                         /* update the reference tag */
2221                         reftag += protgrp_blks;
2222                         bpl++;
2223                         continue;
2224                 }
2225
2226                 /* are we done ? */
2227                 if (curr_prot == protcnt) {
2228                         alldone = 1;
2229                 } else if (curr_prot < protcnt) {
2230                         /* advance to next prot buffer */
2231                         sgpe = sg_next(sgpe);
2232                         bpl++;
2233
2234                         /* update the reference tag */
2235                         reftag += protgrp_blks;
2236                 } else {
2237                         /* if we're here, we have a bug */
2238                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2239                                 "9054 BLKGRD: bug in %s\n", __func__);
2240                 }
2241
2242         } while (!alldone);
2243 out:
2244
2245         return num_bde;
2246 }
2247
2248 /**
2249  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2250  * @phba: The Hba for which this call is being executed.
2251  * @sc: pointer to scsi command we're working on
2252  * @sgl: pointer to buffer list for protection groups
2253  * @datacnt: number of segments of data that have been dma mapped
2254  *
2255  * This function sets up SGL buffer list for protection groups of
2256  * type LPFC_PG_TYPE_NO_DIF
2257  *
2258  * This is usually used when the HBA is instructed to generate
2259  * DIFs and insert them into data stream (or strip DIF from
2260  * incoming data stream)
2261  *
2262  * The buffer list consists of just one protection group described
2263  * below:
2264  *                                +-------------------------+
2265  *   start of prot group  -->     |         DI_SEED         |
2266  *                                +-------------------------+
2267  *                                |         Data SGE        |
2268  *                                +-------------------------+
2269  *                                |more Data SGE's ... (opt)|
2270  *                                +-------------------------+
2271  *
2272  *
2273  * Note: Data s/g buffers have been dma mapped
2274  *
2275  * Returns the number of SGEs added to the SGL.
2276  **/
2277 static int
2278 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2279                 struct sli4_sge *sgl, int datasegcnt)
2280 {
2281         struct scatterlist *sgde = NULL; /* s/g data entry */
2282         struct sli4_sge_diseed *diseed = NULL;
2283         dma_addr_t physaddr;
2284         int i = 0, num_sge = 0, status;
2285         uint32_t reftag;
2286         unsigned blksize;
2287         uint8_t txop, rxop;
2288 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2289         uint32_t rc;
2290 #endif
2291         uint32_t checking = 1;
2292         uint32_t dma_len;
2293         uint32_t dma_offset = 0;
2294
2295         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2296         if (status)
2297                 goto out;
2298
2299         /* extract some info from the scsi command for pde*/
2300         blksize = lpfc_cmd_blksize(sc);
2301         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2302
2303 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2304         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2305         if (rc) {
2306                 if (rc & BG_ERR_SWAP)
2307                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2308                 if (rc & BG_ERR_CHECK)
2309                         checking = 0;
2310         }
2311 #endif
2312
2313         /* setup DISEED with what we have */
2314         diseed = (struct sli4_sge_diseed *) sgl;
2315         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2316         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2317
2318         /* Endianness conversion if necessary */
2319         diseed->ref_tag = cpu_to_le32(reftag);
2320         diseed->ref_tag_tran = diseed->ref_tag;
2321
2322         /*
2323          * We only need to check the data on READs, for WRITEs
2324          * protection data is automatically generated, not checked.
2325          */
2326         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2327                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2328                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2329                 else
2330                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2331
2332                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2333                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2334                 else
2335                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2336         }
2337
2338         /* setup DISEED with the rest of the info */
2339         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2340         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2341
2342         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2343         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2344
2345         /* Endianness conversion if necessary for DISEED */
2346         diseed->word2 = cpu_to_le32(diseed->word2);
2347         diseed->word3 = cpu_to_le32(diseed->word3);
2348
2349         /* advance bpl and increment sge count */
2350         num_sge++;
2351         sgl++;
2352
2353         /* assumption: caller has already run dma_map_sg on command data */
2354         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2355                 physaddr = sg_dma_address(sgde);
2356                 dma_len = sg_dma_len(sgde);
2357                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2358                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2359                 if ((i + 1) == datasegcnt)
2360                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2361                 else
2362                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2363                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2364                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2365
2366                 sgl->sge_len = cpu_to_le32(dma_len);
2367                 dma_offset += dma_len;
2368
2369                 sgl++;
2370                 num_sge++;
2371         }
2372
2373 out:
2374         return num_sge;
2375 }
2376
2377 /**
2378  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2379  * @phba: The Hba for which this call is being executed.
2380  * @sc: pointer to scsi command we're working on
2381  * @sgl: pointer to buffer list for protection groups
2382  * @datacnt: number of segments of data that have been dma mapped
2383  * @protcnt: number of segment of protection data that have been dma mapped
2384  *
2385  * This function sets up SGL buffer list for protection groups of
2386  * type LPFC_PG_TYPE_DIF
2387  *
2388  * This is usually used when DIFs are in their own buffers,
2389  * separate from the data. The HBA can then by instructed
2390  * to place the DIFs in the outgoing stream.  For read operations,
2391  * The HBA could extract the DIFs and place it in DIF buffers.
2392  *
2393  * The buffer list for this type consists of one or more of the
2394  * protection groups described below:
2395  *                                    +-------------------------+
2396  *   start of first prot group  -->   |         DISEED          |
2397  *                                    +-------------------------+
2398  *                                    |      DIF (Prot SGE)     |
2399  *                                    +-------------------------+
2400  *                                    |        Data SGE         |
2401  *                                    +-------------------------+
2402  *                                    |more Data SGE's ... (opt)|
2403  *                                    +-------------------------+
2404  *   start of new  prot group  -->    |         DISEED          |
2405  *                                    +-------------------------+
2406  *                                    |          ...            |
2407  *                                    +-------------------------+
2408  *
2409  * Note: It is assumed that both data and protection s/g buffers have been
2410  *       mapped for DMA
2411  *
2412  * Returns the number of SGEs added to the SGL.
2413  **/
2414 static int
2415 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2416                 struct sli4_sge *sgl, int datacnt, int protcnt)
2417 {
2418         struct scatterlist *sgde = NULL; /* s/g data entry */
2419         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2420         struct sli4_sge_diseed *diseed = NULL;
2421         dma_addr_t dataphysaddr, protphysaddr;
2422         unsigned short curr_data = 0, curr_prot = 0;
2423         unsigned int split_offset;
2424         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2425         unsigned int protgrp_blks, protgrp_bytes;
2426         unsigned int remainder, subtotal;
2427         int status;
2428         unsigned char pgdone = 0, alldone = 0;
2429         unsigned blksize;
2430         uint32_t reftag;
2431         uint8_t txop, rxop;
2432         uint32_t dma_len;
2433 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2434         uint32_t rc;
2435 #endif
2436         uint32_t checking = 1;
2437         uint32_t dma_offset = 0;
2438         int num_sge = 0;
2439
2440         sgpe = scsi_prot_sglist(sc);
2441         sgde = scsi_sglist(sc);
2442
2443         if (!sgpe || !sgde) {
2444                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2445                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2446                                 sgpe, sgde);
2447                 return 0;
2448         }
2449
2450         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2451         if (status)
2452                 goto out;
2453
2454         /* extract some info from the scsi command */
2455         blksize = lpfc_cmd_blksize(sc);
2456         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2457
2458 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2459         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2460         if (rc) {
2461                 if (rc & BG_ERR_SWAP)
2462                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2463                 if (rc & BG_ERR_CHECK)
2464                         checking = 0;
2465         }
2466 #endif
2467
2468         split_offset = 0;
2469         do {
2470                 /* Check to see if we ran out of space */
2471                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2472                         return num_sge + 3;
2473
2474                 /* setup DISEED with what we have */
2475                 diseed = (struct sli4_sge_diseed *) sgl;
2476                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2477                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2478
2479                 /* Endianness conversion if necessary */
2480                 diseed->ref_tag = cpu_to_le32(reftag);
2481                 diseed->ref_tag_tran = diseed->ref_tag;
2482
2483                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2484                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2485
2486                 } else {
2487                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2488                         /*
2489                          * When in this mode, the hardware will replace
2490                          * the guard tag from the host with a
2491                          * newly generated good CRC for the wire.
2492                          * Switch to raw mode here to avoid this
2493                          * behavior. What the host sends gets put on the wire.
2494                          */
2495                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2496                                 txop = BG_OP_RAW_MODE;
2497                                 rxop = BG_OP_RAW_MODE;
2498                         }
2499                 }
2500
2501
2502                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2503                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2504                 else
2505                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2506
2507                 /* setup DISEED with the rest of the info */
2508                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2509                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2510
2511                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2512                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2513
2514                 /* Endianness conversion if necessary for DISEED */
2515                 diseed->word2 = cpu_to_le32(diseed->word2);
2516                 diseed->word3 = cpu_to_le32(diseed->word3);
2517
2518                 /* advance sgl and increment bde count */
2519                 num_sge++;
2520                 sgl++;
2521
2522                 /* setup the first BDE that points to protection buffer */
2523                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2524                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2525
2526                 /* must be integer multiple of the DIF block length */
2527                 BUG_ON(protgroup_len % 8);
2528
2529                 /* Now setup DIF SGE */
2530                 sgl->word2 = 0;
2531                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2532                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2533                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2534                 sgl->word2 = cpu_to_le32(sgl->word2);
2535
2536                 protgrp_blks = protgroup_len / 8;
2537                 protgrp_bytes = protgrp_blks * blksize;
2538
2539                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2540                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2541                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2542                         protgroup_offset += protgroup_remainder;
2543                         protgrp_blks = protgroup_remainder / 8;
2544                         protgrp_bytes = protgrp_blks * blksize;
2545                 } else {
2546                         protgroup_offset = 0;
2547                         curr_prot++;
2548                 }
2549
2550                 num_sge++;
2551
2552                 /* setup SGE's for data blocks associated with DIF data */
2553                 pgdone = 0;
2554                 subtotal = 0; /* total bytes processed for current prot grp */
2555                 while (!pgdone) {
2556                         /* Check to see if we ran out of space */
2557                         if (num_sge >= phba->cfg_total_seg_cnt)
2558                                 return num_sge + 1;
2559
2560                         if (!sgde) {
2561                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2562                                         "9086 BLKGRD:%s Invalid data segment\n",
2563                                                 __func__);
2564                                 return 0;
2565                         }
2566                         sgl++;
2567                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2568
2569                         remainder = sg_dma_len(sgde) - split_offset;
2570
2571                         if ((subtotal + remainder) <= protgrp_bytes) {
2572                                 /* we can use this whole buffer */
2573                                 dma_len = remainder;
2574                                 split_offset = 0;
2575
2576                                 if ((subtotal + remainder) == protgrp_bytes)
2577                                         pgdone = 1;
2578                         } else {
2579                                 /* must split this buffer with next prot grp */
2580                                 dma_len = protgrp_bytes - subtotal;
2581                                 split_offset += dma_len;
2582                         }
2583
2584                         subtotal += dma_len;
2585
2586                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2587                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2588                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2589                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2590                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2591
2592                         sgl->sge_len = cpu_to_le32(dma_len);
2593                         dma_offset += dma_len;
2594
2595                         num_sge++;
2596                         curr_data++;
2597
2598                         if (split_offset)
2599                                 break;
2600
2601                         /* Move to the next s/g segment if possible */
2602                         sgde = sg_next(sgde);
2603                 }
2604
2605                 if (protgroup_offset) {
2606                         /* update the reference tag */
2607                         reftag += protgrp_blks;
2608                         sgl++;
2609                         continue;
2610                 }
2611
2612                 /* are we done ? */
2613                 if (curr_prot == protcnt) {
2614                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2615                         alldone = 1;
2616                 } else if (curr_prot < protcnt) {
2617                         /* advance to next prot buffer */
2618                         sgpe = sg_next(sgpe);
2619                         sgl++;
2620
2621                         /* update the reference tag */
2622                         reftag += protgrp_blks;
2623                 } else {
2624                         /* if we're here, we have a bug */
2625                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2626                                 "9085 BLKGRD: bug in %s\n", __func__);
2627                 }
2628
2629         } while (!alldone);
2630
2631 out:
2632
2633         return num_sge;
2634 }
2635
2636 /**
2637  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2638  * @phba: The Hba for which this call is being executed.
2639  * @sc: pointer to scsi command we're working on
2640  *
2641  * Given a SCSI command that supports DIF, determine composition of protection
2642  * groups involved in setting up buffer lists
2643  *
2644  * Returns: Protection group type (with or without DIF)
2645  *
2646  **/
2647 static int
2648 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2649 {
2650         int ret = LPFC_PG_TYPE_INVALID;
2651         unsigned char op = scsi_get_prot_op(sc);
2652
2653         switch (op) {
2654         case SCSI_PROT_READ_STRIP:
2655         case SCSI_PROT_WRITE_INSERT:
2656                 ret = LPFC_PG_TYPE_NO_DIF;
2657                 break;
2658         case SCSI_PROT_READ_INSERT:
2659         case SCSI_PROT_WRITE_STRIP:
2660         case SCSI_PROT_READ_PASS:
2661         case SCSI_PROT_WRITE_PASS:
2662                 ret = LPFC_PG_TYPE_DIF_BUF;
2663                 break;
2664         default:
2665                 if (phba)
2666                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2667                                         "9021 Unsupported protection op:%d\n",
2668                                         op);
2669                 break;
2670         }
2671         return ret;
2672 }
2673
2674 /**
2675  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2676  * @phba: The Hba for which this call is being executed.
2677  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2678  *
2679  * Adjust the data length to account for how much data
2680  * is actually on the wire.
2681  *
2682  * returns the adjusted data length
2683  **/
2684 static int
2685 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2686                        struct lpfc_scsi_buf *lpfc_cmd)
2687 {
2688         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2689         int fcpdl;
2690
2691         fcpdl = scsi_bufflen(sc);
2692
2693         /* Check if there is protection data on the wire */
2694         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2695                 /* Read check for protection data */
2696                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2697                         return fcpdl;
2698
2699         } else {
2700                 /* Write check for protection data */
2701                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2702                         return fcpdl;
2703         }
2704
2705         /*
2706          * If we are in DIF Type 1 mode every data block has a 8 byte
2707          * DIF (trailer) attached to it. Must ajust FCP data length
2708          * to account for the protection data.
2709          */
2710         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2711
2712         return fcpdl;
2713 }
2714
2715 /**
2716  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2717  * @phba: The Hba for which this call is being executed.
2718  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2719  *
2720  * This is the protection/DIF aware version of
2721  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2722  * two functions eventually, but for now, it's here
2723  **/
2724 static int
2725 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2726                 struct lpfc_scsi_buf *lpfc_cmd)
2727 {
2728         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2729         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2730         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2731         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2732         uint32_t num_bde = 0;
2733         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2734         int prot_group_type = 0;
2735         int fcpdl;
2736
2737         /*
2738          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2739          *  fcp_rsp regions to the first data bde entry
2740          */
2741         bpl += 2;
2742         if (scsi_sg_count(scsi_cmnd)) {
2743                 /*
2744                  * The driver stores the segment count returned from pci_map_sg
2745                  * because this a count of dma-mappings used to map the use_sg
2746                  * pages.  They are not guaranteed to be the same for those
2747                  * architectures that implement an IOMMU.
2748                  */
2749                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2750                                         scsi_sglist(scsi_cmnd),
2751                                         scsi_sg_count(scsi_cmnd), datadir);
2752                 if (unlikely(!datasegcnt))
2753                         return 1;
2754
2755                 lpfc_cmd->seg_cnt = datasegcnt;
2756
2757                 /* First check if data segment count from SCSI Layer is good */
2758                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2759                         goto err;
2760
2761                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2762
2763                 switch (prot_group_type) {
2764                 case LPFC_PG_TYPE_NO_DIF:
2765
2766                         /* Here we need to add a PDE5 and PDE6 to the count */
2767                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2768                                 goto err;
2769
2770                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2771                                         datasegcnt);
2772                         /* we should have 2 or more entries in buffer list */
2773                         if (num_bde < 2)
2774                                 goto err;
2775                         break;
2776
2777                 case LPFC_PG_TYPE_DIF_BUF:
2778                         /*
2779                          * This type indicates that protection buffers are
2780                          * passed to the driver, so that needs to be prepared
2781                          * for DMA
2782                          */
2783                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2784                                         scsi_prot_sglist(scsi_cmnd),
2785                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2786                         if (unlikely(!protsegcnt)) {
2787                                 scsi_dma_unmap(scsi_cmnd);
2788                                 return 1;
2789                         }
2790
2791                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2792
2793                         /*
2794                          * There is a minimun of 4 BPLs used for every
2795                          * protection data segment.
2796                          */
2797                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2798                             (phba->cfg_total_seg_cnt - 2))
2799                                 goto err;
2800
2801                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2802                                         datasegcnt, protsegcnt);
2803                         /* we should have 3 or more entries in buffer list */
2804                         if ((num_bde < 3) ||
2805                             (num_bde > phba->cfg_total_seg_cnt))
2806                                 goto err;
2807                         break;
2808
2809                 case LPFC_PG_TYPE_INVALID:
2810                 default:
2811                         scsi_dma_unmap(scsi_cmnd);
2812                         lpfc_cmd->seg_cnt = 0;
2813
2814                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2815                                         "9022 Unexpected protection group %i\n",
2816                                         prot_group_type);
2817                         return 1;
2818                 }
2819         }
2820
2821         /*
2822          * Finish initializing those IOCB fields that are dependent on the
2823          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2824          * reinitialized since all iocb memory resources are used many times
2825          * for transmit, receive, and continuation bpl's.
2826          */
2827         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2828         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2829         iocb_cmd->ulpBdeCount = 1;
2830         iocb_cmd->ulpLe = 1;
2831
2832         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2833         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2834
2835         /*
2836          * Due to difference in data length between DIF/non-DIF paths,
2837          * we need to set word 4 of IOCB here
2838          */
2839         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2840
2841         return 0;
2842 err:
2843         if (lpfc_cmd->seg_cnt)
2844                 scsi_dma_unmap(scsi_cmnd);
2845         if (lpfc_cmd->prot_seg_cnt)
2846                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2847                              scsi_prot_sg_count(scsi_cmnd),
2848                              scsi_cmnd->sc_data_direction);
2849
2850         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2851                         "9023 Cannot setup S/G List for HBA"
2852                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2853                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2854                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2855                         prot_group_type, num_bde);
2856
2857         lpfc_cmd->seg_cnt = 0;
2858         lpfc_cmd->prot_seg_cnt = 0;
2859         return 1;
2860 }
2861
2862 /*
2863  * This function calcuates the T10 DIF guard tag
2864  * on the specified data using a CRC algorithmn
2865  * using crc_t10dif.
2866  */
2867 static uint16_t
2868 lpfc_bg_crc(uint8_t *data, int count)
2869 {
2870         uint16_t crc = 0;
2871         uint16_t x;
2872
2873         crc = crc_t10dif(data, count);
2874         x = cpu_to_be16(crc);
2875         return x;
2876 }
2877
2878 /*
2879  * This function calcuates the T10 DIF guard tag
2880  * on the specified data using a CSUM algorithmn
2881  * using ip_compute_csum.
2882  */
2883 static uint16_t
2884 lpfc_bg_csum(uint8_t *data, int count)
2885 {
2886         uint16_t ret;
2887
2888         ret = ip_compute_csum(data, count);
2889         return ret;
2890 }
2891
2892 /*
2893  * This function examines the protection data to try to determine
2894  * what type of T10-DIF error occurred.
2895  */
2896 static void
2897 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2898 {
2899         struct scatterlist *sgpe; /* s/g prot entry */
2900         struct scatterlist *sgde; /* s/g data entry */
2901         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2902         struct scsi_dif_tuple *src = NULL;
2903         uint8_t *data_src = NULL;
2904         uint16_t guard_tag, guard_type;
2905         uint16_t start_app_tag, app_tag;
2906         uint32_t start_ref_tag, ref_tag;
2907         int prot, protsegcnt;
2908         int err_type, len, data_len;
2909         int chk_ref, chk_app, chk_guard;
2910         uint16_t sum;
2911         unsigned blksize;
2912
2913         err_type = BGS_GUARD_ERR_MASK;
2914         sum = 0;
2915         guard_tag = 0;
2916
2917         /* First check to see if there is protection data to examine */
2918         prot = scsi_get_prot_op(cmd);
2919         if ((prot == SCSI_PROT_READ_STRIP) ||
2920             (prot == SCSI_PROT_WRITE_INSERT) ||
2921             (prot == SCSI_PROT_NORMAL))
2922                 goto out;
2923
2924         /* Currently the driver just supports ref_tag and guard_tag checking */
2925         chk_ref = 1;
2926         chk_app = 0;
2927         chk_guard = 0;
2928
2929         /* Setup a ptr to the protection data provided by the SCSI host */
2930         sgpe = scsi_prot_sglist(cmd);
2931         protsegcnt = lpfc_cmd->prot_seg_cnt;
2932
2933         if (sgpe && protsegcnt) {
2934
2935                 /*
2936                  * We will only try to verify guard tag if the segment
2937                  * data length is a multiple of the blksize.
2938                  */
2939                 sgde = scsi_sglist(cmd);
2940                 blksize = lpfc_cmd_blksize(cmd);
2941                 data_src = (uint8_t *)sg_virt(sgde);
2942                 data_len = sgde->length;
2943                 if ((data_len & (blksize - 1)) == 0)
2944                         chk_guard = 1;
2945                 guard_type = scsi_host_get_guard(cmd->device->host);
2946
2947                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2948                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2949                 start_app_tag = src->app_tag;
2950                 len = sgpe->length;
2951                 while (src && protsegcnt) {
2952                         while (len) {
2953
2954                                 /*
2955                                  * First check to see if a protection data
2956                                  * check is valid
2957                                  */
2958                                 if ((src->ref_tag == 0xffffffff) ||
2959                                     (src->app_tag == 0xffff)) {
2960                                         start_ref_tag++;
2961                                         goto skipit;
2962                                 }
2963
2964                                 /* First Guard Tag checking */
2965                                 if (chk_guard) {
2966                                         guard_tag = src->guard_tag;
2967                                         if (lpfc_cmd_guard_csum(cmd))
2968                                                 sum = lpfc_bg_csum(data_src,
2969                                                                    blksize);
2970                                         else
2971                                                 sum = lpfc_bg_crc(data_src,
2972                                                                   blksize);
2973                                         if ((guard_tag != sum)) {
2974                                                 err_type = BGS_GUARD_ERR_MASK;
2975                                                 goto out;
2976                                         }
2977                                 }
2978
2979                                 /* Reference Tag checking */
2980                                 ref_tag = be32_to_cpu(src->ref_tag);
2981                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2982                                         err_type = BGS_REFTAG_ERR_MASK;
2983                                         goto out;
2984                                 }
2985                                 start_ref_tag++;
2986
2987                                 /* App Tag checking */
2988                                 app_tag = src->app_tag;
2989                                 if (chk_app && (app_tag != start_app_tag)) {
2990                                         err_type = BGS_APPTAG_ERR_MASK;
2991                                         goto out;
2992                                 }
2993 skipit:
2994                                 len -= sizeof(struct scsi_dif_tuple);
2995                                 if (len < 0)
2996                                         len = 0;
2997                                 src++;
2998
2999                                 data_src += blksize;
3000                                 data_len -= blksize;
3001
3002                                 /*
3003                                  * Are we at the end of the Data segment?
3004                                  * The data segment is only used for Guard
3005                                  * tag checking.
3006                                  */
3007                                 if (chk_guard && (data_len == 0)) {
3008                                         chk_guard = 0;
3009                                         sgde = sg_next(sgde);
3010                                         if (!sgde)
3011                                                 goto out;
3012
3013                                         data_src = (uint8_t *)sg_virt(sgde);
3014                                         data_len = sgde->length;
3015                                         if ((data_len & (blksize - 1)) == 0)
3016                                                 chk_guard = 1;
3017                                 }
3018                         }
3019
3020                         /* Goto the next Protection data segment */
3021                         sgpe = sg_next(sgpe);
3022                         if (sgpe) {
3023                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3024                                 len = sgpe->length;
3025                         } else {
3026                                 src = NULL;
3027                         }
3028                         protsegcnt--;
3029                 }
3030         }
3031 out:
3032         if (err_type == BGS_GUARD_ERR_MASK) {
3033                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3034                                         0x10, 0x1);
3035                 cmd->result = DRIVER_SENSE << 24
3036                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3037                 phba->bg_guard_err_cnt++;
3038                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3039                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3040                                 (unsigned long)scsi_get_lba(cmd),
3041                                 sum, guard_tag);
3042
3043         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3044                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3045                                         0x10, 0x3);
3046                 cmd->result = DRIVER_SENSE << 24
3047                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3048
3049                 phba->bg_reftag_err_cnt++;
3050                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3051                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3052                                 (unsigned long)scsi_get_lba(cmd),
3053                                 ref_tag, start_ref_tag);
3054
3055         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3056                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3057                                         0x10, 0x2);
3058                 cmd->result = DRIVER_SENSE << 24
3059                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3060
3061                 phba->bg_apptag_err_cnt++;
3062                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3063                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3064                                 (unsigned long)scsi_get_lba(cmd),
3065                                 app_tag, start_app_tag);
3066         }
3067 }
3068
3069
3070 /*
3071  * This function checks for BlockGuard errors detected by
3072  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3073  * sense buffer will be set accordingly, paired with
3074  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3075  * detected corruption.
3076  *
3077  * Returns:
3078  *  0 - No error found
3079  *  1 - BlockGuard error found
3080  * -1 - Internal error (bad profile, ...etc)
3081  */
3082 static int
3083 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3084                         struct lpfc_iocbq *pIocbOut)
3085 {
3086         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3087         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3088         int ret = 0;
3089         uint32_t bghm = bgf->bghm;
3090         uint32_t bgstat = bgf->bgstat;
3091         uint64_t failing_sector = 0;
3092
3093         spin_lock(&_dump_buf_lock);
3094         if (!_dump_buf_done) {
3095                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3096                         " Data for %u blocks to debugfs\n",
3097                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3098                 lpfc_debug_save_data(phba, cmd);
3099
3100                 /* If we have a prot sgl, save the DIF buffer */
3101                 if (lpfc_prot_group_type(phba, cmd) ==
3102                                 LPFC_PG_TYPE_DIF_BUF) {
3103                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3104                                 "Saving DIF for %u blocks to debugfs\n",
3105                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3106                         lpfc_debug_save_dif(phba, cmd);
3107                 }
3108
3109                 _dump_buf_done = 1;
3110         }
3111         spin_unlock(&_dump_buf_lock);
3112
3113         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3114                 cmd->result = ScsiResult(DID_ERROR, 0);
3115                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3116                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3117                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3118                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3119                                 (unsigned long long)scsi_get_lba(cmd),
3120                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3121                 ret = (-1);
3122                 goto out;
3123         }
3124
3125         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3126                 cmd->result = ScsiResult(DID_ERROR, 0);
3127                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3128                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3129                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3130                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3131                                 (unsigned long long)scsi_get_lba(cmd),
3132                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3133                 ret = (-1);
3134                 goto out;
3135         }
3136
3137         if (lpfc_bgs_get_guard_err(bgstat)) {
3138                 ret = 1;
3139
3140                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3141                                 0x10, 0x1);
3142                 cmd->result = DRIVER_SENSE << 24
3143                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3144                 phba->bg_guard_err_cnt++;
3145                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3146                                 "9055 BLKGRD: Guard Tag error in cmd"
3147                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3148                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3149                                 (unsigned long long)scsi_get_lba(cmd),
3150                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3151         }
3152
3153         if (lpfc_bgs_get_reftag_err(bgstat)) {
3154                 ret = 1;
3155
3156                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3157                                 0x10, 0x3);
3158                 cmd->result = DRIVER_SENSE << 24
3159                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3160
3161                 phba->bg_reftag_err_cnt++;
3162                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3163                                 "9056 BLKGRD: Ref Tag error in cmd"
3164                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3165                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3166                                 (unsigned long long)scsi_get_lba(cmd),
3167                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3168         }
3169
3170         if (lpfc_bgs_get_apptag_err(bgstat)) {
3171                 ret = 1;
3172
3173                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3174                                 0x10, 0x2);
3175                 cmd->result = DRIVER_SENSE << 24
3176                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3177
3178                 phba->bg_apptag_err_cnt++;
3179                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3180                                 "9061 BLKGRD: App Tag error in cmd"
3181                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3182                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3183                                 (unsigned long long)scsi_get_lba(cmd),
3184                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3185         }
3186
3187         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3188                 /*
3189                  * setup sense data descriptor 0 per SPC-4 as an information
3190                  * field, and put the failing LBA in it.
3191                  * This code assumes there was also a guard/app/ref tag error
3192                  * indication.
3193                  */
3194                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3195                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3196                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3197                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3198
3199                 /* bghm is a "on the wire" FC frame based count */
3200                 switch (scsi_get_prot_op(cmd)) {
3201                 case SCSI_PROT_READ_INSERT:
3202                 case SCSI_PROT_WRITE_STRIP:
3203                         bghm /= cmd->device->sector_size;
3204                         break;
3205                 case SCSI_PROT_READ_STRIP:
3206                 case SCSI_PROT_WRITE_INSERT:
3207                 case SCSI_PROT_READ_PASS:
3208                 case SCSI_PROT_WRITE_PASS:
3209                         bghm /= (cmd->device->sector_size +
3210                                 sizeof(struct scsi_dif_tuple));
3211                         break;
3212                 }
3213
3214                 failing_sector = scsi_get_lba(cmd);
3215                 failing_sector += bghm;
3216
3217                 /* Descriptor Information */
3218                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3219         }
3220
3221         if (!ret) {
3222                 /* No error was reported - problem in FW? */
3223                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3224                                 "9057 BLKGRD: Unknown error in cmd"
3225                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3226                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3227                                 (unsigned long long)scsi_get_lba(cmd),
3228                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3229
3230                 /* Calcuate what type of error it was */
3231                 lpfc_calc_bg_err(phba, lpfc_cmd);
3232         }
3233 out:
3234         return ret;
3235 }
3236
3237 /**
3238  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3239  * @phba: The Hba for which this call is being executed.
3240  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3241  *
3242  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3243  * field of @lpfc_cmd for device with SLI-4 interface spec.
3244  *
3245  * Return codes:
3246  *      1 - Error
3247  *      0 - Success
3248  **/
3249 static int
3250 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3251 {
3252         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3253         struct scatterlist *sgel = NULL;
3254         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3255         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3256         struct sli4_sge *first_data_sgl;
3257         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3258         dma_addr_t physaddr;
3259         uint32_t num_bde = 0;
3260         uint32_t dma_len;
3261         uint32_t dma_offset = 0;
3262         int nseg;
3263         struct ulp_bde64 *bde;
3264
3265         /*
3266          * There are three possibilities here - use scatter-gather segment, use
3267          * the single mapping, or neither.  Start the lpfc command prep by
3268          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3269          * data bde entry.
3270          */
3271         if (scsi_sg_count(scsi_cmnd)) {
3272                 /*
3273                  * The driver stores the segment count returned from pci_map_sg
3274                  * because this a count of dma-mappings used to map the use_sg
3275                  * pages.  They are not guaranteed to be the same for those
3276                  * architectures that implement an IOMMU.
3277                  */
3278
3279                 nseg = scsi_dma_map(scsi_cmnd);
3280                 if (unlikely(!nseg))
3281                         return 1;
3282                 sgl += 1;
3283                 /* clear the last flag in the fcp_rsp map entry */
3284                 sgl->word2 = le32_to_cpu(sgl->word2);
3285                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3286                 sgl->word2 = cpu_to_le32(sgl->word2);
3287                 sgl += 1;
3288                 first_data_sgl = sgl;
3289                 lpfc_cmd->seg_cnt = nseg;
3290                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3291                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3292                                 " %s: Too many sg segments from "
3293                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3294                                 __func__, phba->cfg_sg_seg_cnt,
3295                                lpfc_cmd->seg_cnt);
3296                         lpfc_cmd->seg_cnt = 0;
3297                         scsi_dma_unmap(scsi_cmnd);
3298                         return 1;
3299                 }
3300
3301                 /*
3302                  * The driver established a maximum scatter-gather segment count
3303                  * during probe that limits the number of sg elements in any
3304                  * single scsi command.  Just run through the seg_cnt and format
3305                  * the sge's.
3306                  * When using SLI-3 the driver will try to fit all the BDEs into
3307                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3308                  * does for SLI-2 mode.
3309                  */
3310                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3311                         physaddr = sg_dma_address(sgel);
3312                         dma_len = sg_dma_len(sgel);
3313                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3314                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3315                         sgl->word2 = le32_to_cpu(sgl->word2);
3316                         if ((num_bde + 1) == nseg)
3317                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3318                         else
3319                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3320                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3321                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3322                         sgl->word2 = cpu_to_le32(sgl->word2);
3323                         sgl->sge_len = cpu_to_le32(dma_len);
3324                         dma_offset += dma_len;
3325                         sgl++;
3326                 }
3327                 /* setup the performance hint (first data BDE) if enabled */
3328                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3329                         bde = (struct ulp_bde64 *)
3330                                         &(iocb_cmd->unsli3.sli3Words[5]);
3331                         bde->addrLow = first_data_sgl->addr_lo;
3332                         bde->addrHigh = first_data_sgl->addr_hi;
3333                         bde->tus.f.bdeSize =
3334                                         le32_to_cpu(first_data_sgl->sge_len);
3335                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3336                         bde->tus.w = cpu_to_le32(bde->tus.w);
3337                 }
3338         } else {
3339                 sgl += 1;
3340                 /* clear the last flag in the fcp_rsp map entry */
3341                 sgl->word2 = le32_to_cpu(sgl->word2);
3342                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3343                 sgl->word2 = cpu_to_le32(sgl->word2);
3344         }
3345
3346         /*
3347          * Finish initializing those IOCB fields that are dependent on the
3348          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3349          * explicitly reinitialized.
3350          * all iocb memory resources are reused.
3351          */
3352         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3353
3354         /*
3355          * Due to difference in data length between DIF/non-DIF paths,
3356          * we need to set word 4 of IOCB here
3357          */
3358         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3359
3360         /*
3361          * If the OAS driver feature is enabled and the lun is enabled for
3362          * OAS, set the oas iocb related flags.
3363          */
3364         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3365                 scsi_cmnd->device->hostdata)->oas_enabled)
3366                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3367         return 0;
3368 }
3369
3370 /**
3371  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3372  * @phba: The Hba for which this call is being executed.
3373  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3374  *
3375  * This is the protection/DIF aware version of
3376  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3377  * two functions eventually, but for now, it's here
3378  **/
3379 static int
3380 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3381                 struct lpfc_scsi_buf *lpfc_cmd)
3382 {
3383         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3384         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3385         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3386         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3387         uint32_t num_sge = 0;
3388         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3389         int prot_group_type = 0;
3390         int fcpdl;
3391
3392         /*
3393          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3394          *  fcp_rsp regions to the first data sge entry
3395          */
3396         if (scsi_sg_count(scsi_cmnd)) {
3397                 /*
3398                  * The driver stores the segment count returned from pci_map_sg
3399                  * because this a count of dma-mappings used to map the use_sg
3400                  * pages.  They are not guaranteed to be the same for those
3401                  * architectures that implement an IOMMU.
3402                  */
3403                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3404                                         scsi_sglist(scsi_cmnd),
3405                                         scsi_sg_count(scsi_cmnd), datadir);
3406                 if (unlikely(!datasegcnt))
3407                         return 1;
3408
3409                 sgl += 1;
3410                 /* clear the last flag in the fcp_rsp map entry */
3411                 sgl->word2 = le32_to_cpu(sgl->word2);
3412                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3413                 sgl->word2 = cpu_to_le32(sgl->word2);
3414
3415                 sgl += 1;
3416                 lpfc_cmd->seg_cnt = datasegcnt;
3417
3418                 /* First check if data segment count from SCSI Layer is good */
3419                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3420                         goto err;
3421
3422                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3423
3424                 switch (prot_group_type) {
3425                 case LPFC_PG_TYPE_NO_DIF:
3426                         /* Here we need to add a DISEED to the count */
3427                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3428                                 goto err;
3429
3430                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3431                                         datasegcnt);
3432
3433                         /* we should have 2 or more entries in buffer list */
3434                         if (num_sge < 2)
3435                                 goto err;
3436                         break;
3437
3438                 case LPFC_PG_TYPE_DIF_BUF:
3439                         /*
3440                          * This type indicates that protection buffers are
3441                          * passed to the driver, so that needs to be prepared
3442                          * for DMA
3443                          */
3444                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3445                                         scsi_prot_sglist(scsi_cmnd),
3446                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3447                         if (unlikely(!protsegcnt)) {
3448                                 scsi_dma_unmap(scsi_cmnd);
3449                                 return 1;
3450                         }
3451
3452                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3453                         /*
3454                          * There is a minimun of 3 SGEs used for every
3455                          * protection data segment.
3456                          */
3457                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3458                             (phba->cfg_total_seg_cnt - 2))
3459                                 goto err;
3460
3461                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3462                                         datasegcnt, protsegcnt);
3463
3464                         /* we should have 3 or more entries in buffer list */
3465                         if ((num_sge < 3) ||
3466                             (num_sge > phba->cfg_total_seg_cnt))
3467                                 goto err;
3468                         break;
3469
3470                 case LPFC_PG_TYPE_INVALID:
3471                 default:
3472                         scsi_dma_unmap(scsi_cmnd);
3473                         lpfc_cmd->seg_cnt = 0;
3474
3475                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3476                                         "9083 Unexpected protection group %i\n",
3477                                         prot_group_type);
3478                         return 1;
3479                 }
3480         }
3481
3482         switch (scsi_get_prot_op(scsi_cmnd)) {
3483         case SCSI_PROT_WRITE_STRIP:
3484         case SCSI_PROT_READ_STRIP:
3485                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3486                 break;
3487         case SCSI_PROT_WRITE_INSERT:
3488         case SCSI_PROT_READ_INSERT:
3489                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3490                 break;
3491         case SCSI_PROT_WRITE_PASS:
3492         case SCSI_PROT_READ_PASS:
3493                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3494                 break;
3495         }
3496
3497         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3498         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3499
3500         /*
3501          * Due to difference in data length between DIF/non-DIF paths,
3502          * we need to set word 4 of IOCB here
3503          */
3504         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3505
3506         /*
3507          * If the OAS driver feature is enabled and the lun is enabled for
3508          * OAS, set the oas iocb related flags.
3509          */
3510         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3511                 scsi_cmnd->device->hostdata)->oas_enabled)
3512                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3513
3514         return 0;
3515 err:
3516         if (lpfc_cmd->seg_cnt)
3517                 scsi_dma_unmap(scsi_cmnd);
3518         if (lpfc_cmd->prot_seg_cnt)
3519                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3520                              scsi_prot_sg_count(scsi_cmnd),
3521                              scsi_cmnd->sc_data_direction);
3522
3523         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3524                         "9084 Cannot setup S/G List for HBA"
3525                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3526                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3527                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3528                         prot_group_type, num_sge);
3529
3530         lpfc_cmd->seg_cnt = 0;
3531         lpfc_cmd->prot_seg_cnt = 0;
3532         return 1;
3533 }
3534
3535 /**
3536  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3537  * @phba: The Hba for which this call is being executed.
3538  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3539  *
3540  * This routine wraps the actual DMA mapping function pointer from the
3541  * lpfc_hba struct.
3542  *
3543  * Return codes:
3544  *      1 - Error
3545  *      0 - Success
3546  **/
3547 static inline int
3548 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3549 {
3550         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3551 }
3552
3553 /**
3554  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3555  * using BlockGuard.
3556  * @phba: The Hba for which this call is being executed.
3557  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3558  *
3559  * This routine wraps the actual DMA mapping function pointer from the
3560  * lpfc_hba struct.
3561  *
3562  * Return codes:
3563  *      1 - Error
3564  *      0 - Success
3565  **/
3566 static inline int
3567 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3568 {
3569         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3570 }
3571
3572 /**
3573  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3574  * @phba: Pointer to hba context object.
3575  * @vport: Pointer to vport object.
3576  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3577  * @rsp_iocb: Pointer to response iocb object which reported error.
3578  *
3579  * This function posts an event when there is a SCSI command reporting
3580  * error from the scsi device.
3581  **/
3582 static void
3583 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3584                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3585         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3586         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3587         uint32_t resp_info = fcprsp->rspStatus2;
3588         uint32_t scsi_status = fcprsp->rspStatus3;
3589         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3590         struct lpfc_fast_path_event *fast_path_evt = NULL;
3591         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3592         unsigned long flags;
3593
3594         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3595                 return;
3596
3597         /* If there is queuefull or busy condition send a scsi event */
3598         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3599                 (cmnd->result == SAM_STAT_BUSY)) {
3600                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3601                 if (!fast_path_evt)
3602                         return;
3603                 fast_path_evt->un.scsi_evt.event_type =
3604                         FC_REG_SCSI_EVENT;
3605                 fast_path_evt->un.scsi_evt.subcategory =
3606                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3607                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3608                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3609                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3610                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3611                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3612                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3613         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3614                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3615                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3616                 if (!fast_path_evt)
3617                         return;
3618                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3619                         FC_REG_SCSI_EVENT;
3620                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3621                         LPFC_EVENT_CHECK_COND;
3622                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3623                         cmnd->device->lun;
3624                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3625                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3626                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3627                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3628                 fast_path_evt->un.check_cond_evt.sense_key =
3629                         cmnd->sense_buffer[2] & 0xf;
3630                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3631                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3632         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3633                      fcpi_parm &&
3634                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3635                         ((scsi_status == SAM_STAT_GOOD) &&
3636                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3637                 /*
3638                  * If status is good or resid does not match with fcp_param and
3639                  * there is valid fcpi_parm, then there is a read_check error
3640                  */
3641                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3642                 if (!fast_path_evt)
3643                         return;
3644                 fast_path_evt->un.read_check_error.header.event_type =
3645                         FC_REG_FABRIC_EVENT;
3646                 fast_path_evt->un.read_check_error.header.subcategory =
3647                         LPFC_EVENT_FCPRDCHKERR;
3648                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3649                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3650                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3651                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3652                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3653                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3654                 fast_path_evt->un.read_check_error.fcpiparam =
3655                         fcpi_parm;
3656         } else
3657                 return;
3658
3659         fast_path_evt->vport = vport;
3660         spin_lock_irqsave(&phba->hbalock, flags);
3661         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3662         spin_unlock_irqrestore(&phba->hbalock, flags);
3663         lpfc_worker_wake_up(phba);
3664         return;
3665 }
3666
3667 /**
3668  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3669  * @phba: The HBA for which this call is being executed.
3670  * @psb: The scsi buffer which is going to be un-mapped.
3671  *
3672  * This routine does DMA un-mapping of scatter gather list of scsi command
3673  * field of @lpfc_cmd for device with SLI-3 interface spec.
3674  **/
3675 static void
3676 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3677 {
3678         /*
3679          * There are only two special cases to consider.  (1) the scsi command
3680          * requested scatter-gather usage or (2) the scsi command allocated
3681          * a request buffer, but did not request use_sg.  There is a third
3682          * case, but it does not require resource deallocation.
3683          */
3684         if (psb->seg_cnt > 0)
3685                 scsi_dma_unmap(psb->pCmd);
3686         if (psb->prot_seg_cnt > 0)
3687                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3688                                 scsi_prot_sg_count(psb->pCmd),
3689                                 psb->pCmd->sc_data_direction);
3690 }
3691
3692 /**
3693  * lpfc_handler_fcp_err - FCP response handler
3694  * @vport: The virtual port for which this call is being executed.
3695  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3696  * @rsp_iocb: The response IOCB which contains FCP error.
3697  *
3698  * This routine is called to process response IOCB with status field
3699  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3700  * based upon SCSI and FCP error.
3701  **/
3702 static void
3703 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3704                     struct lpfc_iocbq *rsp_iocb)
3705 {
3706         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3707         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3708         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3709         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3710         uint32_t resp_info = fcprsp->rspStatus2;
3711         uint32_t scsi_status = fcprsp->rspStatus3;
3712         uint32_t *lp;
3713         uint32_t host_status = DID_OK;
3714         uint32_t rsplen = 0;
3715         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3716
3717
3718         /*
3719          *  If this is a task management command, there is no
3720          *  scsi packet associated with this lpfc_cmd.  The driver
3721          *  consumes it.
3722          */
3723         if (fcpcmd->fcpCntl2) {
3724                 scsi_status = 0;
3725                 goto out;
3726         }
3727
3728         if (resp_info & RSP_LEN_VALID) {
3729                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3730                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3731                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3732                                  "2719 Invalid response length: "
3733                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3734                                  cmnd->device->id,
3735                                  cmnd->device->lun, cmnd->cmnd[0],
3736                                  rsplen);
3737                         host_status = DID_ERROR;
3738                         goto out;
3739                 }
3740                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3741                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3742                                  "2757 Protocol failure detected during "
3743                                  "processing of FCP I/O op: "
3744                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3745                                  cmnd->device->id,
3746                                  cmnd->device->lun, cmnd->cmnd[0],
3747                                  fcprsp->rspInfo3);
3748                         host_status = DID_ERROR;
3749                         goto out;
3750                 }
3751         }
3752
3753         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3754                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3755                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3756                         snslen = SCSI_SENSE_BUFFERSIZE;
3757
3758                 if (resp_info & RSP_LEN_VALID)
3759                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3760                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3761         }
3762         lp = (uint32_t *)cmnd->sense_buffer;
3763
3764         /* special handling for under run conditions */
3765         if (!scsi_status && (resp_info & RESID_UNDER)) {
3766                 /* don't log under runs if fcp set... */
3767                 if (vport->cfg_log_verbose & LOG_FCP)
3768                         logit = LOG_FCP_ERROR;
3769                 /* unless operator says so */
3770                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3771                         logit = LOG_FCP_UNDER;
3772         }
3773
3774         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3775                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3776                          "Data: x%x x%x x%x x%x x%x\n",
3777                          cmnd->cmnd[0], scsi_status,
3778                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3779                          be32_to_cpu(fcprsp->rspResId),
3780                          be32_to_cpu(fcprsp->rspSnsLen),
3781                          be32_to_cpu(fcprsp->rspRspLen),
3782                          fcprsp->rspInfo3);
3783
3784         scsi_set_resid(cmnd, 0);
3785         if (resp_info & RESID_UNDER) {
3786                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3787
3788                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3789                                  "9025 FCP Read Underrun, expected %d, "
3790                                  "residual %d Data: x%x x%x x%x\n",
3791                                  be32_to_cpu(fcpcmd->fcpDl),
3792                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3793                                  cmnd->underflow);
3794
3795                 /*
3796                  * If there is an under run check if under run reported by
3797                  * storage array is same as the under run reported by HBA.
3798                  * If this is not same, there is a dropped frame.
3799                  */
3800                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3801                         fcpi_parm &&
3802                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3803                         lpfc_printf_vlog(vport, KERN_WARNING,
3804                                          LOG_FCP | LOG_FCP_ERROR,
3805                                          "9026 FCP Read Check Error "
3806                                          "and Underrun Data: x%x x%x x%x x%x\n",
3807                                          be32_to_cpu(fcpcmd->fcpDl),
3808                                          scsi_get_resid(cmnd), fcpi_parm,
3809                                          cmnd->cmnd[0]);
3810                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3811                         host_status = DID_ERROR;
3812                 }
3813                 /*
3814                  * The cmnd->underflow is the minimum number of bytes that must
3815                  * be transferred for this command.  Provided a sense condition
3816                  * is not present, make sure the actual amount transferred is at
3817                  * least the underflow value or fail.
3818                  */
3819                 if (!(resp_info & SNS_LEN_VALID) &&
3820                     (scsi_status == SAM_STAT_GOOD) &&
3821                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3822                      < cmnd->underflow)) {
3823                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3824                                          "9027 FCP command x%x residual "
3825                                          "underrun converted to error "
3826                                          "Data: x%x x%x x%x\n",
3827                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3828                                          scsi_get_resid(cmnd), cmnd->underflow);
3829                         host_status = DID_ERROR;
3830                 }
3831         } else if (resp_info & RESID_OVER) {
3832                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3833                                  "9028 FCP command x%x residual overrun error. "
3834                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3835                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3836                 host_status = DID_ERROR;
3837
3838         /*
3839          * Check SLI validation that all the transfer was actually done
3840          * (fcpi_parm should be zero). Apply check only to reads.
3841          */
3842         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
3843                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3844                                  "9029 FCP Read Check Error Data: "
3845                                  "x%x x%x x%x x%x x%x\n",
3846                                  be32_to_cpu(fcpcmd->fcpDl),
3847                                  be32_to_cpu(fcprsp->rspResId),
3848                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3849                 switch (scsi_status) {
3850                 case SAM_STAT_GOOD:
3851                 case SAM_STAT_CHECK_CONDITION:
3852                         /* Fabric dropped a data frame. Fail any successful
3853                          * command in which we detected dropped frames.
3854                          * A status of good or some check conditions could
3855                          * be considered a successful command.
3856                          */
3857                         host_status = DID_ERROR;
3858                         break;
3859                 }
3860                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3861         }
3862
3863  out:
3864         cmnd->result = ScsiResult(host_status, scsi_status);
3865         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3866 }
3867
3868 /**
3869  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3870  * @phba: The Hba for which this call is being executed.
3871  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3872  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3873  *
3874  * This routine assigns scsi command result by looking into response IOCB
3875  * status field appropriately. This routine handles QUEUE FULL condition as
3876  * well by ramping down device queue depth.
3877  **/
3878 static void
3879 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3880                         struct lpfc_iocbq *pIocbOut)
3881 {
3882         struct lpfc_scsi_buf *lpfc_cmd =
3883                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3884         struct lpfc_vport      *vport = pIocbIn->vport;
3885         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3886         struct lpfc_nodelist *pnode = rdata->pnode;
3887         struct scsi_cmnd *cmd;
3888         int result;
3889         int depth;
3890         unsigned long flags;
3891         struct lpfc_fast_path_event *fast_path_evt;
3892         struct Scsi_Host *shost;
3893         uint32_t queue_depth, scsi_id;
3894         uint32_t logit = LOG_FCP;
3895
3896         /* Sanity check on return of outstanding command */
3897         if (!(lpfc_cmd->pCmd))
3898                 return;
3899         cmd = lpfc_cmd->pCmd;
3900         shost = cmd->device->host;
3901
3902         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3903         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3904         /* pick up SLI4 exhange busy status from HBA */
3905         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3906
3907 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3908         if (lpfc_cmd->prot_data_type) {
3909                 struct scsi_dif_tuple *src = NULL;
3910
3911                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3912                 /*
3913                  * Used to restore any changes to protection
3914                  * data for error injection.
3915                  */
3916                 switch (lpfc_cmd->prot_data_type) {
3917                 case LPFC_INJERR_REFTAG:
3918                         src->ref_tag =
3919                                 lpfc_cmd->prot_data;
3920                         break;
3921                 case LPFC_INJERR_APPTAG:
3922                         src->app_tag =
3923                                 (uint16_t)lpfc_cmd->prot_data;
3924                         break;
3925                 case LPFC_INJERR_GUARD:
3926                         src->guard_tag =
3927                                 (uint16_t)lpfc_cmd->prot_data;
3928                         break;
3929                 default:
3930                         break;
3931                 }
3932
3933                 lpfc_cmd->prot_data = 0;
3934                 lpfc_cmd->prot_data_type = 0;
3935                 lpfc_cmd->prot_data_segment = NULL;
3936         }
3937 #endif
3938         if (pnode && NLP_CHK_NODE_ACT(pnode))
3939                 atomic_dec(&pnode->cmd_pending);
3940
3941         if (lpfc_cmd->status) {
3942                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3943                     (lpfc_cmd->result & IOERR_DRVR_MASK))
3944                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3945                 else if (lpfc_cmd->status >= IOSTAT_CNT)
3946                         lpfc_cmd->status = IOSTAT_DEFAULT;
3947                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3948                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
3949                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3950                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3951                         logit = 0;
3952                 else
3953                         logit = LOG_FCP | LOG_FCP_UNDER;
3954                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3955                          "9030 FCP cmd x%x failed <%d/%lld> "
3956                          "status: x%x result: x%x "
3957                          "sid: x%x did: x%x oxid: x%x "
3958                          "Data: x%x x%x\n",
3959                          cmd->cmnd[0],
3960                          cmd->device ? cmd->device->id : 0xffff,
3961                          cmd->device ? cmd->device->lun : 0xffff,
3962                          lpfc_cmd->status, lpfc_cmd->result,
3963                          vport->fc_myDID,
3964                          (pnode) ? pnode->nlp_DID : 0,
3965                          phba->sli_rev == LPFC_SLI_REV4 ?
3966                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
3967                          pIocbOut->iocb.ulpContext,
3968                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
3969
3970                 switch (lpfc_cmd->status) {
3971                 case IOSTAT_FCP_RSP_ERROR:
3972                         /* Call FCP RSP handler to determine result */
3973                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
3974                         break;
3975                 case IOSTAT_NPORT_BSY:
3976                 case IOSTAT_FABRIC_BSY:
3977                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
3978                         fast_path_evt = lpfc_alloc_fast_evt(phba);
3979                         if (!fast_path_evt)
3980                                 break;
3981                         fast_path_evt->un.fabric_evt.event_type =
3982                                 FC_REG_FABRIC_EVENT;
3983                         fast_path_evt->un.fabric_evt.subcategory =
3984                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
3985                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
3986                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
3987                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
3988                                         &pnode->nlp_portname,
3989                                         sizeof(struct lpfc_name));
3990                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
3991                                         &pnode->nlp_nodename,
3992                                         sizeof(struct lpfc_name));
3993                         }
3994                         fast_path_evt->vport = vport;
3995                         fast_path_evt->work_evt.evt =
3996                                 LPFC_EVT_FASTPATH_MGMT_EVT;
3997                         spin_lock_irqsave(&phba->hbalock, flags);
3998                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
3999                                 &phba->work_list);
4000                         spin_unlock_irqrestore(&phba->hbalock, flags);
4001                         lpfc_worker_wake_up(phba);
4002                         break;
4003                 case IOSTAT_LOCAL_REJECT:
4004                 case IOSTAT_REMOTE_STOP:
4005                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4006                             lpfc_cmd->result ==
4007                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4008                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4009                             lpfc_cmd->result ==
4010                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4011                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4012                                 break;
4013                         }
4014                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4015                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4016                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4017                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4018                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
4019                                 break;
4020                         }
4021                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4022                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4023                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4024                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4025                                         /*
4026                                          * This is a response for a BG enabled
4027                                          * cmd. Parse BG error
4028                                          */
4029                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4030                                                         pIocbOut);
4031                                         break;
4032                                 } else {
4033                                         lpfc_printf_vlog(vport, KERN_WARNING,
4034                                                         LOG_BG,
4035                                                         "9031 non-zero BGSTAT "
4036                                                         "on unprotected cmd\n");
4037                                 }
4038                         }
4039                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4040                                 && (phba->sli_rev == LPFC_SLI_REV4)
4041                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4042                                 /* This IO was aborted by the target, we don't
4043                                  * know the rxid and because we did not send the
4044                                  * ABTS we cannot generate and RRQ.
4045                                  */
4046                                 lpfc_set_rrq_active(phba, pnode,
4047                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4048                                         0, 0);
4049                         }
4050                 /* else: fall through */
4051                 default:
4052                         cmd->result = ScsiResult(DID_ERROR, 0);
4053                         break;
4054                 }
4055
4056                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4057                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4058                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4059                                                  SAM_STAT_BUSY);
4060         } else
4061                 cmd->result = ScsiResult(DID_OK, 0);
4062
4063         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4064                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4065
4066                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4067                                  "0710 Iodone <%d/%llu> cmd %p, error "
4068                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4069                                  cmd->device->id, cmd->device->lun, cmd,
4070                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4071                                  scsi_get_resid(cmd));
4072         }
4073
4074         lpfc_update_stats(phba, lpfc_cmd);
4075         result = cmd->result;
4076         if (vport->cfg_max_scsicmpl_time &&
4077            time_after(jiffies, lpfc_cmd->start_time +
4078                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4079                 spin_lock_irqsave(shost->host_lock, flags);
4080                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4081                         if (pnode->cmd_qdepth >
4082                                 atomic_read(&pnode->cmd_pending) &&
4083                                 (atomic_read(&pnode->cmd_pending) >
4084                                 LPFC_MIN_TGT_QDEPTH) &&
4085                                 ((cmd->cmnd[0] == READ_10) ||
4086                                 (cmd->cmnd[0] == WRITE_10)))
4087                                 pnode->cmd_qdepth =
4088                                         atomic_read(&pnode->cmd_pending);
4089
4090                         pnode->last_change_time = jiffies;
4091                 }
4092                 spin_unlock_irqrestore(shost->host_lock, flags);
4093         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4094                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4095                    time_after(jiffies, pnode->last_change_time +
4096                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4097                         spin_lock_irqsave(shost->host_lock, flags);
4098                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4099                                 / 100;
4100                         depth = depth ? depth : 1;
4101                         pnode->cmd_qdepth += depth;
4102                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4103                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4104                         pnode->last_change_time = jiffies;
4105                         spin_unlock_irqrestore(shost->host_lock, flags);
4106                 }
4107         }
4108
4109         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4110
4111         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4112         queue_depth = cmd->device->queue_depth;
4113         scsi_id = cmd->device->id;
4114         cmd->scsi_done(cmd);
4115
4116         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4117                 spin_lock_irqsave(&phba->hbalock, flags);
4118                 lpfc_cmd->pCmd = NULL;
4119                 spin_unlock_irqrestore(&phba->hbalock, flags);
4120
4121                 /*
4122                  * If there is a thread waiting for command completion
4123                  * wake up the thread.
4124                  */
4125                 spin_lock_irqsave(shost->host_lock, flags);
4126                 if (lpfc_cmd->waitq)
4127                         wake_up(lpfc_cmd->waitq);
4128                 spin_unlock_irqrestore(shost->host_lock, flags);
4129                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4130                 return;
4131         }
4132
4133         spin_lock_irqsave(&phba->hbalock, flags);
4134         lpfc_cmd->pCmd = NULL;
4135         spin_unlock_irqrestore(&phba->hbalock, flags);
4136
4137         /*
4138          * If there is a thread waiting for command completion
4139          * wake up the thread.
4140          */
4141         spin_lock_irqsave(shost->host_lock, flags);
4142         if (lpfc_cmd->waitq)
4143                 wake_up(lpfc_cmd->waitq);
4144         spin_unlock_irqrestore(shost->host_lock, flags);
4145
4146         lpfc_release_scsi_buf(phba, lpfc_cmd);
4147 }
4148
4149 /**
4150  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4151  * @vport: The virtual port for which this call is being executed.
4152  * @lpfc_cmd: The scsi command which needs to send.
4153  * @pnode: Pointer to lpfc_nodelist.
4154  *
4155  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4156  * to transfer for device with SLI3 interface spec.
4157  **/
4158 static void
4159 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4160                     struct lpfc_nodelist *pnode)
4161 {
4162         struct lpfc_hba *phba = vport->phba;
4163         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4164         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4165         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4166         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4167         int datadir = scsi_cmnd->sc_data_direction;
4168         uint8_t *ptr;
4169         bool sli4;
4170         uint32_t fcpdl;
4171
4172         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4173                 return;
4174
4175         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4176         /* clear task management bits */
4177         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4178
4179         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4180                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4181
4182         ptr = &fcp_cmnd->fcpCdb[0];
4183         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4184         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4185                 ptr += scsi_cmnd->cmd_len;
4186                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4187         }
4188
4189         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4190
4191         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4192         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4193
4194         /*
4195          * There are three possibilities here - use scatter-gather segment, use
4196          * the single mapping, or neither.  Start the lpfc command prep by
4197          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4198          * data bde entry.
4199          */
4200         if (scsi_sg_count(scsi_cmnd)) {
4201                 if (datadir == DMA_TO_DEVICE) {
4202                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4203                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4204                         if (vport->cfg_first_burst_size &&
4205                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4206                                 fcpdl = scsi_bufflen(scsi_cmnd);
4207                                 if (fcpdl < vport->cfg_first_burst_size)
4208                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4209                                 else
4210                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4211                                                 vport->cfg_first_burst_size;
4212                         }
4213                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4214                         phba->fc4OutputRequests++;
4215                 } else {
4216                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4217                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4218                         fcp_cmnd->fcpCntl3 = READ_DATA;
4219                         phba->fc4InputRequests++;
4220                 }
4221         } else {
4222                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4223                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4224                 iocb_cmd->ulpPU = 0;
4225                 fcp_cmnd->fcpCntl3 = 0;
4226                 phba->fc4ControlRequests++;
4227         }
4228         /*
4229          * Finish initializing those IOCB fields that are independent
4230          * of the scsi_cmnd request_buffer
4231          */
4232         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4233         if (sli4)
4234                 piocbq->iocb.ulpContext =
4235                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4236         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4237                 piocbq->iocb.ulpFCP2Rcvy = 1;
4238         else
4239                 piocbq->iocb.ulpFCP2Rcvy = 0;
4240
4241         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4242         piocbq->context1  = lpfc_cmd;
4243         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4244         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4245         piocbq->vport = vport;
4246 }
4247
4248 /**
4249  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4250  * @vport: The virtual port for which this call is being executed.
4251  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4252  * @lun: Logical unit number.
4253  * @task_mgmt_cmd: SCSI task management command.
4254  *
4255  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4256  * for device with SLI-3 interface spec.
4257  *
4258  * Return codes:
4259  *   0 - Error
4260  *   1 - Success
4261  **/
4262 static int
4263 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4264                              struct lpfc_scsi_buf *lpfc_cmd,
4265                              uint64_t lun,
4266                              uint8_t task_mgmt_cmd)
4267 {
4268         struct lpfc_iocbq *piocbq;
4269         IOCB_t *piocb;
4270         struct fcp_cmnd *fcp_cmnd;
4271         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4272         struct lpfc_nodelist *ndlp = rdata->pnode;
4273
4274         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4275             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4276                 return 0;
4277
4278         piocbq = &(lpfc_cmd->cur_iocbq);
4279         piocbq->vport = vport;
4280
4281         piocb = &piocbq->iocb;
4282
4283         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4284         /* Clear out any old data in the FCP command area */
4285         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4286         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4287         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4288         if (vport->phba->sli_rev == 3 &&
4289             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4290                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4291         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4292         piocb->ulpContext = ndlp->nlp_rpi;
4293         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4294                 piocb->ulpContext =
4295                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4296         }
4297         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4298         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4299         piocb->ulpPU = 0;
4300         piocb->un.fcpi.fcpi_parm = 0;
4301
4302         /* ulpTimeout is only one byte */
4303         if (lpfc_cmd->timeout > 0xff) {
4304                 /*
4305                  * Do not timeout the command at the firmware level.
4306                  * The driver will provide the timeout mechanism.
4307                  */
4308                 piocb->ulpTimeout = 0;
4309         } else
4310                 piocb->ulpTimeout = lpfc_cmd->timeout;
4311
4312         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4313                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4314
4315         return 1;
4316 }
4317
4318 /**
4319  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4320  * @phba: The hba struct for which this call is being executed.
4321  * @dev_grp: The HBA PCI-Device group number.
4322  *
4323  * This routine sets up the SCSI interface API function jump table in @phba
4324  * struct.
4325  * Returns: 0 - success, -ENODEV - failure.
4326  **/
4327 int
4328 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4329 {
4330
4331         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4332         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4333
4334         switch (dev_grp) {
4335         case LPFC_PCI_DEV_LP:
4336                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4337                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4338                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4339                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4340                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4341                 break;
4342         case LPFC_PCI_DEV_OC:
4343                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4344                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4345                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4346                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4347                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4348                 break;
4349         default:
4350                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4351                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4352                                 dev_grp);
4353                 return -ENODEV;
4354                 break;
4355         }
4356         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4357         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4358         return 0;
4359 }
4360
4361 /**
4362  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4363  * @phba: The Hba for which this call is being executed.
4364  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4365  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4366  *
4367  * This routine is IOCB completion routine for device reset and target reset
4368  * routine. This routine release scsi buffer associated with lpfc_cmd.
4369  **/
4370 static void
4371 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4372                         struct lpfc_iocbq *cmdiocbq,
4373                         struct lpfc_iocbq *rspiocbq)
4374 {
4375         struct lpfc_scsi_buf *lpfc_cmd =
4376                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4377         if (lpfc_cmd)
4378                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4379         return;
4380 }
4381
4382 /**
4383  * lpfc_info - Info entry point of scsi_host_template data structure
4384  * @host: The scsi host for which this call is being executed.
4385  *
4386  * This routine provides module information about hba.
4387  *
4388  * Reutrn code:
4389  *   Pointer to char - Success.
4390  **/
4391 const char *
4392 lpfc_info(struct Scsi_Host *host)
4393 {
4394         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4395         struct lpfc_hba   *phba = vport->phba;
4396         int len, link_speed = 0;
4397         static char  lpfcinfobuf[384];
4398
4399         memset(lpfcinfobuf,0,384);
4400         if (phba && phba->pcidev){
4401                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4402                 len = strlen(lpfcinfobuf);
4403                 snprintf(lpfcinfobuf + len,
4404                         384-len,
4405                         " on PCI bus %02x device %02x irq %d",
4406                         phba->pcidev->bus->number,
4407                         phba->pcidev->devfn,
4408                         phba->pcidev->irq);
4409                 len = strlen(lpfcinfobuf);
4410                 if (phba->Port[0]) {
4411                         snprintf(lpfcinfobuf + len,
4412                                  384-len,
4413                                  " port %s",
4414                                  phba->Port);
4415                 }
4416                 len = strlen(lpfcinfobuf);
4417                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4418                         link_speed = lpfc_sli_port_speed_get(phba);
4419                 } else {
4420                         if (phba->sli4_hba.link_state.logical_speed)
4421                                 link_speed =
4422                                       phba->sli4_hba.link_state.logical_speed;
4423                         else
4424                                 link_speed = phba->sli4_hba.link_state.speed;
4425                 }
4426                 if (link_speed != 0)
4427                         snprintf(lpfcinfobuf + len, 384-len,
4428                                  " Logical Link Speed: %d Mbps", link_speed);
4429         }
4430         return lpfcinfobuf;
4431 }
4432
4433 /**
4434  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4435  * @phba: The Hba for which this call is being executed.
4436  *
4437  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4438  * The default value of cfg_poll_tmo is 10 milliseconds.
4439  **/
4440 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4441 {
4442         unsigned long  poll_tmo_expires =
4443                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4444
4445         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4446                 mod_timer(&phba->fcp_poll_timer,
4447                           poll_tmo_expires);
4448 }
4449
4450 /**
4451  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4452  * @phba: The Hba for which this call is being executed.
4453  *
4454  * This routine starts the fcp_poll_timer of @phba.
4455  **/
4456 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4457 {
4458         lpfc_poll_rearm_timer(phba);
4459 }
4460
4461 /**
4462  * lpfc_poll_timeout - Restart polling timer
4463  * @ptr: Map to lpfc_hba data structure pointer.
4464  *
4465  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4466  * and FCP Ring interrupt is disable.
4467  **/
4468
4469 void lpfc_poll_timeout(unsigned long ptr)
4470 {
4471         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4472
4473         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4474                 lpfc_sli_handle_fast_ring_event(phba,
4475                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4476
4477                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4478                         lpfc_poll_rearm_timer(phba);
4479         }
4480 }
4481
4482 /**
4483  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4484  * @cmnd: Pointer to scsi_cmnd data structure.
4485  * @done: Pointer to done routine.
4486  *
4487  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4488  * This routine prepares an IOCB from scsi command and provides to firmware.
4489  * The @done callback is invoked after driver finished processing the command.
4490  *
4491  * Return value :
4492  *   0 - Success
4493  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4494  **/
4495 static int
4496 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4497 {
4498         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4499         struct lpfc_hba   *phba = vport->phba;
4500         struct lpfc_rport_data *rdata;
4501         struct lpfc_nodelist *ndlp;
4502         struct lpfc_scsi_buf *lpfc_cmd;
4503         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4504         int err;
4505
4506         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4507         err = fc_remote_port_chkready(rport);
4508         if (err) {
4509                 cmnd->result = err;
4510                 goto out_fail_command;
4511         }
4512         ndlp = rdata->pnode;
4513
4514         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4515                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4516
4517                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4518                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4519                                 " op:%02x str=%s without registering for"
4520                                 " BlockGuard - Rejecting command\n",
4521                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4522                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4523                 goto out_fail_command;
4524         }
4525
4526         /*
4527          * Catch race where our node has transitioned, but the
4528          * transport is still transitioning.
4529          */
4530         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4531                 goto out_tgt_busy;
4532         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4533                 goto out_tgt_busy;
4534
4535         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4536         if (lpfc_cmd == NULL) {
4537                 lpfc_rampdown_queue_depth(phba);
4538
4539                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4540                                  "0707 driver's buffer pool is empty, "
4541                                  "IO busied\n");
4542                 goto out_host_busy;
4543         }
4544
4545         /*
4546          * Store the midlayer's command structure for the completion phase
4547          * and complete the command initialization.
4548          */
4549         lpfc_cmd->pCmd  = cmnd;
4550         lpfc_cmd->rdata = rdata;
4551         lpfc_cmd->timeout = 0;
4552         lpfc_cmd->start_time = jiffies;
4553         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4554
4555         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4556                 if (vport->phba->cfg_enable_bg) {
4557                         lpfc_printf_vlog(vport,
4558                                          KERN_INFO, LOG_SCSI_CMD,
4559                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4560                                          "sector x%llx cnt %u pt %x\n",
4561                                          dif_op_str[scsi_get_prot_op(cmnd)],
4562                                          cmnd->cmnd[0],
4563                                          (unsigned long long)scsi_get_lba(cmnd),
4564                                          blk_rq_sectors(cmnd->request),
4565                                          (cmnd->cmnd[1]>>5));
4566                 }
4567                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4568         } else {
4569                 if (vport->phba->cfg_enable_bg) {
4570                         lpfc_printf_vlog(vport,
4571                                          KERN_INFO, LOG_SCSI_CMD,
4572                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4573                                          "x%x sector x%llx cnt %u pt %x\n",
4574                                          cmnd->cmnd[0],
4575                                          (unsigned long long)scsi_get_lba(cmnd),
4576                                          blk_rq_sectors(cmnd->request),
4577                                          (cmnd->cmnd[1]>>5));
4578                 }
4579                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4580         }
4581
4582         if (err)
4583                 goto out_host_busy_free_buf;
4584
4585         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4586
4587         atomic_inc(&ndlp->cmd_pending);
4588         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4589                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4590         if (err) {
4591                 atomic_dec(&ndlp->cmd_pending);
4592                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4593                                  "3376 FCP could not issue IOCB err %x"
4594                                  "FCP cmd x%x <%d/%llu> "
4595                                  "sid: x%x did: x%x oxid: x%x "
4596                                  "Data: x%x x%x x%x x%x\n",
4597                                  err, cmnd->cmnd[0],
4598                                  cmnd->device ? cmnd->device->id : 0xffff,
4599                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4600                                  vport->fc_myDID, ndlp->nlp_DID,
4601                                  phba->sli_rev == LPFC_SLI_REV4 ?
4602                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4603                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4604                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4605                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4606                                  (uint32_t)
4607                                  (cmnd->request->timeout / 1000));
4608
4609
4610                 goto out_host_busy_free_buf;
4611         }
4612         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4613                 lpfc_sli_handle_fast_ring_event(phba,
4614                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4615
4616                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4617                         lpfc_poll_rearm_timer(phba);
4618         }
4619
4620         return 0;
4621
4622  out_host_busy_free_buf:
4623         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4624         lpfc_release_scsi_buf(phba, lpfc_cmd);
4625  out_host_busy:
4626         return SCSI_MLQUEUE_HOST_BUSY;
4627
4628  out_tgt_busy:
4629         return SCSI_MLQUEUE_TARGET_BUSY;
4630
4631  out_fail_command:
4632         cmnd->scsi_done(cmnd);
4633         return 0;
4634 }
4635
4636
4637 /**
4638  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4639  * @cmnd: Pointer to scsi_cmnd data structure.
4640  *
4641  * This routine aborts @cmnd pending in base driver.
4642  *
4643  * Return code :
4644  *   0x2003 - Error
4645  *   0x2002 - Success
4646  **/
4647 static int
4648 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4649 {
4650         struct Scsi_Host  *shost = cmnd->device->host;
4651         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4652         struct lpfc_hba   *phba = vport->phba;
4653         struct lpfc_iocbq *iocb;
4654         struct lpfc_iocbq *abtsiocb;
4655         struct lpfc_scsi_buf *lpfc_cmd;
4656         IOCB_t *cmd, *icmd;
4657         int ret = SUCCESS, status = 0;
4658         struct lpfc_sli_ring *pring_s4;
4659         int ring_number, ret_val;
4660         unsigned long flags, iflags;
4661         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4662
4663         status = fc_block_scsi_eh(cmnd);
4664         if (status != 0 && status != SUCCESS)
4665                 return status;
4666
4667         spin_lock_irqsave(&phba->hbalock, flags);
4668         /* driver queued commands are in process of being flushed */
4669         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4670                 spin_unlock_irqrestore(&phba->hbalock, flags);
4671                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4672                         "3168 SCSI Layer abort requested I/O has been "
4673                         "flushed by LLD.\n");
4674                 return FAILED;
4675         }
4676
4677         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4678         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4679                 spin_unlock_irqrestore(&phba->hbalock, flags);
4680                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4681                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4682                          "x%x ID %d LUN %llu\n",
4683                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4684                 return SUCCESS;
4685         }
4686
4687         iocb = &lpfc_cmd->cur_iocbq;
4688         /* the command is in process of being cancelled */
4689         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4690                 spin_unlock_irqrestore(&phba->hbalock, flags);
4691                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4692                         "3169 SCSI Layer abort requested I/O has been "
4693                         "cancelled by LLD.\n");
4694                 return FAILED;
4695         }
4696         /*
4697          * If pCmd field of the corresponding lpfc_scsi_buf structure
4698          * points to a different SCSI command, then the driver has
4699          * already completed this command, but the midlayer did not
4700          * see the completion before the eh fired. Just return SUCCESS.
4701          */
4702         if (lpfc_cmd->pCmd != cmnd) {
4703                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4704                         "3170 SCSI Layer abort requested I/O has been "
4705                         "completed by LLD.\n");
4706                 goto out_unlock;
4707         }
4708
4709         BUG_ON(iocb->context1 != lpfc_cmd);
4710
4711         /* abort issued in recovery is still in progress */
4712         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4713                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4714                          "3389 SCSI Layer I/O Abort Request is pending\n");
4715                 spin_unlock_irqrestore(&phba->hbalock, flags);
4716                 goto wait_for_cmpl;
4717         }
4718
4719         abtsiocb = __lpfc_sli_get_iocbq(phba);
4720         if (abtsiocb == NULL) {
4721                 ret = FAILED;
4722                 goto out_unlock;
4723         }
4724
4725         /* Indicate the IO is being aborted by the driver. */
4726         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4727
4728         /*
4729          * The scsi command can not be in txq and it is in flight because the
4730          * pCmd is still pointig at the SCSI command we have to abort. There
4731          * is no need to search the txcmplq. Just send an abort to the FW.
4732          */
4733
4734         cmd = &iocb->iocb;
4735         icmd = &abtsiocb->iocb;
4736         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4737         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4738         if (phba->sli_rev == LPFC_SLI_REV4)
4739                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4740         else
4741                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4742
4743         icmd->ulpLe = 1;
4744         icmd->ulpClass = cmd->ulpClass;
4745
4746         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4747         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4748         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4749         if (iocb->iocb_flag & LPFC_IO_FOF)
4750                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4751
4752         if (lpfc_is_link_up(phba))
4753                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4754         else
4755                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4756
4757         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4758         abtsiocb->vport = vport;
4759         if (phba->sli_rev == LPFC_SLI_REV4) {
4760                 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
4761                 pring_s4 = &phba->sli.ring[ring_number];
4762                 /* Note: both hbalock and ring_lock must be set here */
4763                 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4764                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4765                                                 abtsiocb, 0);
4766                 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4767         } else {
4768                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4769                                                 abtsiocb, 0);
4770         }
4771         /* no longer need the lock after this point */
4772         spin_unlock_irqrestore(&phba->hbalock, flags);
4773
4774
4775         if (ret_val == IOCB_ERROR) {
4776                 lpfc_sli_release_iocbq(phba, abtsiocb);
4777                 ret = FAILED;
4778                 goto out;
4779         }
4780
4781         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4782                 lpfc_sli_handle_fast_ring_event(phba,
4783                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4784
4785 wait_for_cmpl:
4786         lpfc_cmd->waitq = &waitq;
4787         /* Wait for abort to complete */
4788         wait_event_timeout(waitq,
4789                           (lpfc_cmd->pCmd != cmnd),
4790                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4791
4792         spin_lock_irqsave(shost->host_lock, flags);
4793         lpfc_cmd->waitq = NULL;
4794         spin_unlock_irqrestore(shost->host_lock, flags);
4795
4796         if (lpfc_cmd->pCmd == cmnd) {
4797                 ret = FAILED;
4798                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4799                                  "0748 abort handler timed out waiting "
4800                                  "for abortng I/O (xri:x%x) to complete: "
4801                                  "ret %#x, ID %d, LUN %llu\n",
4802                                  iocb->sli4_xritag, ret,
4803                                  cmnd->device->id, cmnd->device->lun);
4804         }
4805         goto out;
4806
4807 out_unlock:
4808         spin_unlock_irqrestore(&phba->hbalock, flags);
4809 out:
4810         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4811                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4812                          "LUN %llu\n", ret, cmnd->device->id,
4813                          cmnd->device->lun);
4814         return ret;
4815 }
4816
4817 static char *
4818 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4819 {
4820         switch (task_mgmt_cmd) {
4821         case FCP_ABORT_TASK_SET:
4822                 return "ABORT_TASK_SET";
4823         case FCP_CLEAR_TASK_SET:
4824                 return "FCP_CLEAR_TASK_SET";
4825         case FCP_BUS_RESET:
4826                 return "FCP_BUS_RESET";
4827         case FCP_LUN_RESET:
4828                 return "FCP_LUN_RESET";
4829         case FCP_TARGET_RESET:
4830                 return "FCP_TARGET_RESET";
4831         case FCP_CLEAR_ACA:
4832                 return "FCP_CLEAR_ACA";
4833         case FCP_TERMINATE_TASK:
4834                 return "FCP_TERMINATE_TASK";
4835         default:
4836                 return "unknown";
4837         }
4838 }
4839
4840
4841 /**
4842  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4843  * @vport: The virtual port for which this call is being executed.
4844  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4845  *
4846  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4847  *
4848  * Return code :
4849  *   0x2003 - Error
4850  *   0x2002 - Success
4851  **/
4852 static int
4853 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4854 {
4855         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4856         uint32_t rsp_info;
4857         uint32_t rsp_len;
4858         uint8_t  rsp_info_code;
4859         int ret = FAILED;
4860
4861
4862         if (fcprsp == NULL)
4863                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4864                                  "0703 fcp_rsp is missing\n");
4865         else {
4866                 rsp_info = fcprsp->rspStatus2;
4867                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4868                 rsp_info_code = fcprsp->rspInfo3;
4869
4870
4871                 lpfc_printf_vlog(vport, KERN_INFO,
4872                                  LOG_FCP,
4873                                  "0706 fcp_rsp valid 0x%x,"
4874                                  " rsp len=%d code 0x%x\n",
4875                                  rsp_info,
4876                                  rsp_len, rsp_info_code);
4877
4878                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
4879                         switch (rsp_info_code) {
4880                         case RSP_NO_FAILURE:
4881                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4882                                                  "0715 Task Mgmt No Failure\n");
4883                                 ret = SUCCESS;
4884                                 break;
4885                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4886                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4887                                                  "0716 Task Mgmt Target "
4888                                                 "reject\n");
4889                                 break;
4890                         case RSP_TM_NOT_COMPLETED: /* TM failed */
4891                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4892                                                  "0717 Task Mgmt Target "
4893                                                 "failed TM\n");
4894                                 break;
4895                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4896                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4897                                                  "0718 Task Mgmt to invalid "
4898                                                 "LUN\n");
4899                                 break;
4900                         }
4901                 }
4902         }
4903         return ret;
4904 }
4905
4906
4907 /**
4908  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
4909  * @vport: The virtual port for which this call is being executed.
4910  * @rdata: Pointer to remote port local data
4911  * @tgt_id: Target ID of remote device.
4912  * @lun_id: Lun number for the TMF
4913  * @task_mgmt_cmd: type of TMF to send
4914  *
4915  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
4916  * a remote port.
4917  *
4918  * Return Code:
4919  *   0x2003 - Error
4920  *   0x2002 - Success.
4921  **/
4922 static int
4923 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
4924                     unsigned  tgt_id, uint64_t lun_id,
4925                     uint8_t task_mgmt_cmd)
4926 {
4927         struct lpfc_hba   *phba = vport->phba;
4928         struct lpfc_scsi_buf *lpfc_cmd;
4929         struct lpfc_iocbq *iocbq;
4930         struct lpfc_iocbq *iocbqrsp;
4931         struct lpfc_nodelist *pnode = rdata->pnode;
4932         int ret;
4933         int status;
4934
4935         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4936                 return FAILED;
4937
4938         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
4939         if (lpfc_cmd == NULL)
4940                 return FAILED;
4941         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
4942         lpfc_cmd->rdata = rdata;
4943
4944         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
4945                                            task_mgmt_cmd);
4946         if (!status) {
4947                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4948                 return FAILED;
4949         }
4950
4951         iocbq = &lpfc_cmd->cur_iocbq;
4952         iocbqrsp = lpfc_sli_get_iocbq(phba);
4953         if (iocbqrsp == NULL) {
4954                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4955                 return FAILED;
4956         }
4957         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
4958
4959         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4960                          "0702 Issue %s to TGT %d LUN %llu "
4961                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
4962                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
4963                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
4964                          iocbq->iocb_flag);
4965
4966         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
4967                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
4968         if ((status != IOCB_SUCCESS) ||
4969             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
4970                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4971                          "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) "
4972                          "iocb_flag x%x\n",
4973                          lpfc_taskmgmt_name(task_mgmt_cmd),
4974                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
4975                          iocbqrsp->iocb.un.ulpWord[4],
4976                          iocbq->iocb_flag);
4977                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
4978                 if (status == IOCB_SUCCESS) {
4979                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
4980                                 /* Something in the FCP_RSP was invalid.
4981                                  * Check conditions */
4982                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
4983                         else
4984                                 ret = FAILED;
4985                 } else if (status == IOCB_TIMEDOUT) {
4986                         ret = TIMEOUT_ERROR;
4987                 } else {
4988                         ret = FAILED;
4989                 }
4990                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4991         } else
4992                 ret = SUCCESS;
4993
4994         lpfc_sli_release_iocbq(phba, iocbqrsp);
4995
4996         if (ret != TIMEOUT_ERROR)
4997                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4998
4999         return ret;
5000 }
5001
5002 /**
5003  * lpfc_chk_tgt_mapped -
5004  * @vport: The virtual port to check on
5005  * @cmnd: Pointer to scsi_cmnd data structure.
5006  *
5007  * This routine delays until the scsi target (aka rport) for the
5008  * command exists (is present and logged in) or we declare it non-existent.
5009  *
5010  * Return code :
5011  *  0x2003 - Error
5012  *  0x2002 - Success
5013  **/
5014 static int
5015 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5016 {
5017         struct lpfc_rport_data *rdata;
5018         struct lpfc_nodelist *pnode;
5019         unsigned long later;
5020
5021         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5022         if (!rdata) {
5023                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5024                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5025                 return FAILED;
5026         }
5027         pnode = rdata->pnode;
5028         /*
5029          * If target is not in a MAPPED state, delay until
5030          * target is rediscovered or devloss timeout expires.
5031          */
5032         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5033         while (time_after(later, jiffies)) {
5034                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5035                         return FAILED;
5036                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5037                         return SUCCESS;
5038                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5039                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5040                 if (!rdata)
5041                         return FAILED;
5042                 pnode = rdata->pnode;
5043         }
5044         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5045             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5046                 return FAILED;
5047         return SUCCESS;
5048 }
5049
5050 /**
5051  * lpfc_reset_flush_io_context -
5052  * @vport: The virtual port (scsi_host) for the flush context
5053  * @tgt_id: If aborting by Target contect - specifies the target id
5054  * @lun_id: If aborting by Lun context - specifies the lun id
5055  * @context: specifies the context level to flush at.
5056  *
5057  * After a reset condition via TMF, we need to flush orphaned i/o
5058  * contexts from the adapter. This routine aborts any contexts
5059  * outstanding, then waits for their completions. The wait is
5060  * bounded by devloss_tmo though.
5061  *
5062  * Return code :
5063  *  0x2003 - Error
5064  *  0x2002 - Success
5065  **/
5066 static int
5067 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5068                         uint64_t lun_id, lpfc_ctx_cmd context)
5069 {
5070         struct lpfc_hba   *phba = vport->phba;
5071         unsigned long later;
5072         int cnt;
5073
5074         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5075         if (cnt)
5076                 lpfc_sli_abort_taskmgmt(vport,
5077                                         &phba->sli.ring[phba->sli.fcp_ring],
5078                                         tgt_id, lun_id, context);
5079         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5080         while (time_after(later, jiffies) && cnt) {
5081                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5082                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5083         }
5084         if (cnt) {
5085                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5086                         "0724 I/O flush failure for context %s : cnt x%x\n",
5087                         ((context == LPFC_CTX_LUN) ? "LUN" :
5088                          ((context == LPFC_CTX_TGT) ? "TGT" :
5089                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5090                         cnt);
5091                 return FAILED;
5092         }
5093         return SUCCESS;
5094 }
5095
5096 /**
5097  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5098  * @cmnd: Pointer to scsi_cmnd data structure.
5099  *
5100  * This routine does a device reset by sending a LUN_RESET task management
5101  * command.
5102  *
5103  * Return code :
5104  *  0x2003 - Error
5105  *  0x2002 - Success
5106  **/
5107 static int
5108 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5109 {
5110         struct Scsi_Host  *shost = cmnd->device->host;
5111         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5112         struct lpfc_rport_data *rdata;
5113         struct lpfc_nodelist *pnode;
5114         unsigned tgt_id = cmnd->device->id;
5115         uint64_t lun_id = cmnd->device->lun;
5116         struct lpfc_scsi_event_header scsi_event;
5117         int status;
5118
5119         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5120         if (!rdata || !rdata->pnode) {
5121                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5122                                  "0798 Device Reset rport failure: rdata x%p\n",
5123                                  rdata);
5124                 return FAILED;
5125         }
5126         pnode = rdata->pnode;
5127         status = fc_block_scsi_eh(cmnd);
5128         if (status != 0 && status != SUCCESS)
5129                 return status;
5130
5131         status = lpfc_chk_tgt_mapped(vport, cmnd);
5132         if (status == FAILED) {
5133                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5134                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5135                 return FAILED;
5136         }
5137
5138         scsi_event.event_type = FC_REG_SCSI_EVENT;
5139         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5140         scsi_event.lun = lun_id;
5141         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5142         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5143
5144         fc_host_post_vendor_event(shost, fc_get_event_number(),
5145                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5146
5147         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5148                                                 FCP_LUN_RESET);
5149
5150         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5151                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5152                          "return x%x\n", tgt_id, lun_id, status);
5153
5154         /*
5155          * We have to clean up i/o as : they may be orphaned by the TMF;
5156          * or if the TMF failed, they may be in an indeterminate state.
5157          * So, continue on.
5158          * We will report success if all the i/o aborts successfully.
5159          */
5160         if (status == SUCCESS)
5161                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5162                                                 LPFC_CTX_LUN);
5163
5164         return status;
5165 }
5166
5167 /**
5168  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5169  * @cmnd: Pointer to scsi_cmnd data structure.
5170  *
5171  * This routine does a target reset by sending a TARGET_RESET task management
5172  * command.
5173  *
5174  * Return code :
5175  *  0x2003 - Error
5176  *  0x2002 - Success
5177  **/
5178 static int
5179 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5180 {
5181         struct Scsi_Host  *shost = cmnd->device->host;
5182         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5183         struct lpfc_rport_data *rdata;
5184         struct lpfc_nodelist *pnode;
5185         unsigned tgt_id = cmnd->device->id;
5186         uint64_t lun_id = cmnd->device->lun;
5187         struct lpfc_scsi_event_header scsi_event;
5188         int status;
5189
5190         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5191         if (!rdata) {
5192                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5193                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5194                 return FAILED;
5195         }
5196         pnode = rdata->pnode;
5197         status = fc_block_scsi_eh(cmnd);
5198         if (status != 0 && status != SUCCESS)
5199                 return status;
5200
5201         status = lpfc_chk_tgt_mapped(vport, cmnd);
5202         if (status == FAILED) {
5203                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5204                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5205                 if (pnode) {
5206                         spin_lock_irq(shost->host_lock);
5207                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5208                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5209                         spin_unlock_irq(shost->host_lock);
5210                 }
5211                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5212                                           LPFC_CTX_TGT);
5213                 return FAST_IO_FAIL;
5214         }
5215
5216         scsi_event.event_type = FC_REG_SCSI_EVENT;
5217         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5218         scsi_event.lun = 0;
5219         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5220         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5221
5222         fc_host_post_vendor_event(shost, fc_get_event_number(),
5223                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5224
5225         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5226                                         FCP_TARGET_RESET);
5227
5228         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5229                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5230                          "return x%x\n", tgt_id, lun_id, status);
5231
5232         /*
5233          * We have to clean up i/o as : they may be orphaned by the TMF;
5234          * or if the TMF failed, they may be in an indeterminate state.
5235          * So, continue on.
5236          * We will report success if all the i/o aborts successfully.
5237          */
5238         if (status == SUCCESS)
5239                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5240                                           LPFC_CTX_TGT);
5241         return status;
5242 }
5243
5244 /**
5245  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5246  * @cmnd: Pointer to scsi_cmnd data structure.
5247  *
5248  * This routine does target reset to all targets on @cmnd->device->host.
5249  * This emulates Parallel SCSI Bus Reset Semantics.
5250  *
5251  * Return code :
5252  *  0x2003 - Error
5253  *  0x2002 - Success
5254  **/
5255 static int
5256 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5257 {
5258         struct Scsi_Host  *shost = cmnd->device->host;
5259         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5260         struct lpfc_nodelist *ndlp = NULL;
5261         struct lpfc_scsi_event_header scsi_event;
5262         int match;
5263         int ret = SUCCESS, status, i;
5264
5265         scsi_event.event_type = FC_REG_SCSI_EVENT;
5266         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5267         scsi_event.lun = 0;
5268         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5269         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5270
5271         fc_host_post_vendor_event(shost, fc_get_event_number(),
5272                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5273
5274         status = fc_block_scsi_eh(cmnd);
5275         if (status != 0 && status != SUCCESS)
5276                 return status;
5277
5278         /*
5279          * Since the driver manages a single bus device, reset all
5280          * targets known to the driver.  Should any target reset
5281          * fail, this routine returns failure to the midlayer.
5282          */
5283         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5284                 /* Search for mapped node by target ID */
5285                 match = 0;
5286                 spin_lock_irq(shost->host_lock);
5287                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5288                         if (!NLP_CHK_NODE_ACT(ndlp))
5289                                 continue;
5290                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5291                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5292                                 continue;
5293                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5294                             ndlp->nlp_sid == i &&
5295                             ndlp->rport) {
5296                                 match = 1;
5297                                 break;
5298                         }
5299                 }
5300                 spin_unlock_irq(shost->host_lock);
5301                 if (!match)
5302                         continue;
5303
5304                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5305                                         i, 0, FCP_TARGET_RESET);
5306
5307                 if (status != SUCCESS) {
5308                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5309                                          "0700 Bus Reset on target %d failed\n",
5310                                          i);
5311                         ret = FAILED;
5312                 }
5313         }
5314         /*
5315          * We have to clean up i/o as : they may be orphaned by the TMFs
5316          * above; or if any of the TMFs failed, they may be in an
5317          * indeterminate state.
5318          * We will report success if all the i/o aborts successfully.
5319          */
5320
5321         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5322         if (status != SUCCESS)
5323                 ret = FAILED;
5324
5325         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5326                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5327         return ret;
5328 }
5329
5330 /**
5331  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5332  * @cmnd: Pointer to scsi_cmnd data structure.
5333  *
5334  * This routine does host reset to the adaptor port. It brings the HBA
5335  * offline, performs a board restart, and then brings the board back online.
5336  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5337  * reject all outstanding SCSI commands to the host and error returned
5338  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5339  * of error handling, it will only return error if resetting of the adapter
5340  * is not successful; in all other cases, will return success.
5341  *
5342  * Return code :
5343  *  0x2003 - Error
5344  *  0x2002 - Success
5345  **/
5346 static int
5347 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5348 {
5349         struct Scsi_Host *shost = cmnd->device->host;
5350         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5351         struct lpfc_hba *phba = vport->phba;
5352         int rc, ret = SUCCESS;
5353
5354         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5355                          "3172 SCSI layer issued Host Reset Data:\n");
5356
5357         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5358         lpfc_offline(phba);
5359         rc = lpfc_sli_brdrestart(phba);
5360         if (rc)
5361                 ret = FAILED;
5362         rc = lpfc_online(phba);
5363         if (rc)
5364                 ret = FAILED;
5365         lpfc_unblock_mgmt_io(phba);
5366
5367         if (ret == FAILED) {
5368                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5369                                  "3323 Failed host reset, bring it offline\n");
5370                 lpfc_sli4_offline_eratt(phba);
5371         }
5372         return ret;
5373 }
5374
5375 /**
5376  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5377  * @sdev: Pointer to scsi_device.
5378  *
5379  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5380  * globally available list of scsi buffers. This routine also makes sure scsi
5381  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5382  * of scsi buffer exists for the lifetime of the driver.
5383  *
5384  * Return codes:
5385  *   non-0 - Error
5386  *   0 - Success
5387  **/
5388 static int
5389 lpfc_slave_alloc(struct scsi_device *sdev)
5390 {
5391         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5392         struct lpfc_hba   *phba = vport->phba;
5393         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5394         uint32_t total = 0;
5395         uint32_t num_to_alloc = 0;
5396         int num_allocated = 0;
5397         uint32_t sdev_cnt;
5398         struct lpfc_device_data *device_data;
5399         unsigned long flags;
5400         struct lpfc_name target_wwpn;
5401
5402         if (!rport || fc_remote_port_chkready(rport))
5403                 return -ENXIO;
5404
5405         if (phba->cfg_fof) {
5406
5407                 /*
5408                  * Check to see if the device data structure for the lun
5409                  * exists.  If not, create one.
5410                  */
5411
5412                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5413                 spin_lock_irqsave(&phba->devicelock, flags);
5414                 device_data = __lpfc_get_device_data(phba,
5415                                                      &phba->luns,
5416                                                      &vport->fc_portname,
5417                                                      &target_wwpn,
5418                                                      sdev->lun);
5419                 if (!device_data) {
5420                         spin_unlock_irqrestore(&phba->devicelock, flags);
5421                         device_data = lpfc_create_device_data(phba,
5422                                                         &vport->fc_portname,
5423                                                         &target_wwpn,
5424                                                         sdev->lun, true);
5425                         if (!device_data)
5426                                 return -ENOMEM;
5427                         spin_lock_irqsave(&phba->devicelock, flags);
5428                         list_add_tail(&device_data->listentry, &phba->luns);
5429                 }
5430                 device_data->rport_data = rport->dd_data;
5431                 device_data->available = true;
5432                 spin_unlock_irqrestore(&phba->devicelock, flags);
5433                 sdev->hostdata = device_data;
5434         } else {
5435                 sdev->hostdata = rport->dd_data;
5436         }
5437         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5438
5439         /*
5440          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5441          * available list of scsi buffers.  Don't allocate more than the
5442          * HBA limit conveyed to the midlayer via the host structure.  The
5443          * formula accounts for the lun_queue_depth + error handlers + 1
5444          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5445          */
5446         total = phba->total_scsi_bufs;
5447         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5448
5449         /* If allocated buffers are enough do nothing */
5450         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5451                 return 0;
5452
5453         /* Allow some exchanges to be available always to complete discovery */
5454         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5455                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5456                                  "0704 At limitation of %d preallocated "
5457                                  "command buffers\n", total);
5458                 return 0;
5459         /* Allow some exchanges to be available always to complete discovery */
5460         } else if (total + num_to_alloc >
5461                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5462                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5463                                  "0705 Allocation request of %d "
5464                                  "command buffers will exceed max of %d.  "
5465                                  "Reducing allocation request to %d.\n",
5466                                  num_to_alloc, phba->cfg_hba_queue_depth,
5467                                  (phba->cfg_hba_queue_depth - total));
5468                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5469         }
5470         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5471         if (num_to_alloc != num_allocated) {
5472                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5473                                          "0708 Allocation request of %d "
5474                                          "command buffers did not succeed.  "
5475                                          "Allocated %d buffers.\n",
5476                                          num_to_alloc, num_allocated);
5477         }
5478         if (num_allocated > 0)
5479                 phba->total_scsi_bufs += num_allocated;
5480         return 0;
5481 }
5482
5483 /**
5484  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5485  * @sdev: Pointer to scsi_device.
5486  *
5487  * This routine configures following items
5488  *   - Tag command queuing support for @sdev if supported.
5489  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5490  *
5491  * Return codes:
5492  *   0 - Success
5493  **/
5494 static int
5495 lpfc_slave_configure(struct scsi_device *sdev)
5496 {
5497         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5498         struct lpfc_hba   *phba = vport->phba;
5499
5500         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5501
5502         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5503                 lpfc_sli_handle_fast_ring_event(phba,
5504                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5505                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5506                         lpfc_poll_rearm_timer(phba);
5507         }
5508
5509         return 0;
5510 }
5511
5512 /**
5513  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5514  * @sdev: Pointer to scsi_device.
5515  *
5516  * This routine sets @sdev hostatdata filed to null.
5517  **/
5518 static void
5519 lpfc_slave_destroy(struct scsi_device *sdev)
5520 {
5521         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5522         struct lpfc_hba   *phba = vport->phba;
5523         unsigned long flags;
5524         struct lpfc_device_data *device_data = sdev->hostdata;
5525
5526         atomic_dec(&phba->sdev_cnt);
5527         if ((phba->cfg_fof) && (device_data)) {
5528                 spin_lock_irqsave(&phba->devicelock, flags);
5529                 device_data->available = false;
5530                 if (!device_data->oas_enabled)
5531                         lpfc_delete_device_data(phba, device_data);
5532                 spin_unlock_irqrestore(&phba->devicelock, flags);
5533         }
5534         sdev->hostdata = NULL;
5535         return;
5536 }
5537
5538 /**
5539  * lpfc_create_device_data - creates and initializes device data structure for OAS
5540  * @pha: Pointer to host bus adapter structure.
5541  * @vport_wwpn: Pointer to vport's wwpn information
5542  * @target_wwpn: Pointer to target's wwpn information
5543  * @lun: Lun on target
5544  * @atomic_create: Flag to indicate if memory should be allocated using the
5545  *                GFP_ATOMIC flag or not.
5546  *
5547  * This routine creates a device data structure which will contain identifying
5548  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5549  * whether or not the corresponding lun is available by the system,
5550  * and pointer to the rport data.
5551  *
5552  * Return codes:
5553  *   NULL - Error
5554  *   Pointer to lpfc_device_data - Success
5555  **/
5556 struct lpfc_device_data*
5557 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5558                         struct lpfc_name *target_wwpn, uint64_t lun,
5559                         bool atomic_create)
5560 {
5561
5562         struct lpfc_device_data *lun_info;
5563         int memory_flags;
5564
5565         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5566             !(phba->cfg_fof))
5567                 return NULL;
5568
5569         /* Attempt to create the device data to contain lun info */
5570
5571         if (atomic_create)
5572                 memory_flags = GFP_ATOMIC;
5573         else
5574                 memory_flags = GFP_KERNEL;
5575         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5576         if (!lun_info)
5577                 return NULL;
5578         INIT_LIST_HEAD(&lun_info->listentry);
5579         lun_info->rport_data  = NULL;
5580         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5581                sizeof(struct lpfc_name));
5582         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5583                sizeof(struct lpfc_name));
5584         lun_info->device_id.lun = lun;
5585         lun_info->oas_enabled = false;
5586         lun_info->available = false;
5587         return lun_info;
5588 }
5589
5590 /**
5591  * lpfc_delete_device_data - frees a device data structure for OAS
5592  * @pha: Pointer to host bus adapter structure.
5593  * @lun_info: Pointer to device data structure to free.
5594  *
5595  * This routine frees the previously allocated device data structure passed.
5596  *
5597  **/
5598 void
5599 lpfc_delete_device_data(struct lpfc_hba *phba,
5600                         struct lpfc_device_data *lun_info)
5601 {
5602
5603         if (unlikely(!phba) || !lun_info  ||
5604             !(phba->cfg_fof))
5605                 return;
5606
5607         if (!list_empty(&lun_info->listentry))
5608                 list_del(&lun_info->listentry);
5609         mempool_free(lun_info, phba->device_data_mem_pool);
5610         return;
5611 }
5612
5613 /**
5614  * __lpfc_get_device_data - returns the device data for the specified lun
5615  * @pha: Pointer to host bus adapter structure.
5616  * @list: Point to list to search.
5617  * @vport_wwpn: Pointer to vport's wwpn information
5618  * @target_wwpn: Pointer to target's wwpn information
5619  * @lun: Lun on target
5620  *
5621  * This routine searches the list passed for the specified lun's device data.
5622  * This function does not hold locks, it is the responsibility of the caller
5623  * to ensure the proper lock is held before calling the function.
5624  *
5625  * Return codes:
5626  *   NULL - Error
5627  *   Pointer to lpfc_device_data - Success
5628  **/
5629 struct lpfc_device_data*
5630 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5631                        struct lpfc_name *vport_wwpn,
5632                        struct lpfc_name *target_wwpn, uint64_t lun)
5633 {
5634
5635         struct lpfc_device_data *lun_info;
5636
5637         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5638             !phba->cfg_fof)
5639                 return NULL;
5640
5641         /* Check to see if the lun is already enabled for OAS. */
5642
5643         list_for_each_entry(lun_info, list, listentry) {
5644                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5645                             sizeof(struct lpfc_name)) == 0) &&
5646                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5647                             sizeof(struct lpfc_name)) == 0) &&
5648                     (lun_info->device_id.lun == lun))
5649                         return lun_info;
5650         }
5651
5652         return NULL;
5653 }
5654
5655 /**
5656  * lpfc_find_next_oas_lun - searches for the next oas lun
5657  * @pha: Pointer to host bus adapter structure.
5658  * @vport_wwpn: Pointer to vport's wwpn information
5659  * @target_wwpn: Pointer to target's wwpn information
5660  * @starting_lun: Pointer to the lun to start searching for
5661  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5662  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5663  * @found_lun: Pointer to the found lun.
5664  * @found_lun_status: Pointer to status of the found lun.
5665  *
5666  * This routine searches the luns list for the specified lun
5667  * or the first lun for the vport/target.  If the vport wwpn contains
5668  * a zero value then a specific vport is not specified. In this case
5669  * any vport which contains the lun will be considered a match.  If the
5670  * target wwpn contains a zero value then a specific target is not specified.
5671  * In this case any target which contains the lun will be considered a
5672  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5673  * are returned.  The function will also return the next lun if available.
5674  * If the next lun is not found, starting_lun parameter will be set to
5675  * NO_MORE_OAS_LUN.
5676  *
5677  * Return codes:
5678  *   non-0 - Error
5679  *   0 - Success
5680  **/
5681 bool
5682 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5683                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5684                        struct lpfc_name *found_vport_wwpn,
5685                        struct lpfc_name *found_target_wwpn,
5686                        uint64_t *found_lun,
5687                        uint32_t *found_lun_status)
5688 {
5689
5690         unsigned long flags;
5691         struct lpfc_device_data *lun_info;
5692         struct lpfc_device_id *device_id;
5693         uint64_t lun;
5694         bool found = false;
5695
5696         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5697             !starting_lun || !found_vport_wwpn ||
5698             !found_target_wwpn || !found_lun || !found_lun_status ||
5699             (*starting_lun == NO_MORE_OAS_LUN) ||
5700             !phba->cfg_fof)
5701                 return false;
5702
5703         lun = *starting_lun;
5704         *found_lun = NO_MORE_OAS_LUN;
5705         *starting_lun = NO_MORE_OAS_LUN;
5706
5707         /* Search for lun or the lun closet in value */
5708
5709         spin_lock_irqsave(&phba->devicelock, flags);
5710         list_for_each_entry(lun_info, &phba->luns, listentry) {
5711                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5712                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5713                             sizeof(struct lpfc_name)) == 0)) &&
5714                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5715                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5716                             sizeof(struct lpfc_name)) == 0)) &&
5717                     (lun_info->oas_enabled)) {
5718                         device_id = &lun_info->device_id;
5719                         if ((!found) &&
5720                             ((lun == FIND_FIRST_OAS_LUN) ||
5721                              (device_id->lun == lun))) {
5722                                 *found_lun = device_id->lun;
5723                                 memcpy(found_vport_wwpn,
5724                                        &device_id->vport_wwpn,
5725                                        sizeof(struct lpfc_name));
5726                                 memcpy(found_target_wwpn,
5727                                        &device_id->target_wwpn,
5728                                        sizeof(struct lpfc_name));
5729                                 if (lun_info->available)
5730                                         *found_lun_status =
5731                                                 OAS_LUN_STATUS_EXISTS;
5732                                 else
5733                                         *found_lun_status = 0;
5734                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5735                                         memset(vport_wwpn, 0x0,
5736                                                sizeof(struct lpfc_name));
5737                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5738                                         memset(target_wwpn, 0x0,
5739                                                sizeof(struct lpfc_name));
5740                                 found = true;
5741                         } else if (found) {
5742                                 *starting_lun = device_id->lun;
5743                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5744                                        sizeof(struct lpfc_name));
5745                                 memcpy(target_wwpn, &device_id->target_wwpn,
5746                                        sizeof(struct lpfc_name));
5747                                 break;
5748                         }
5749                 }
5750         }
5751         spin_unlock_irqrestore(&phba->devicelock, flags);
5752         return found;
5753 }
5754
5755 /**
5756  * lpfc_enable_oas_lun - enables a lun for OAS operations
5757  * @pha: Pointer to host bus adapter structure.
5758  * @vport_wwpn: Pointer to vport's wwpn information
5759  * @target_wwpn: Pointer to target's wwpn information
5760  * @lun: Lun
5761  *
5762  * This routine enables a lun for oas operations.  The routines does so by
5763  * doing the following :
5764  *
5765  *   1) Checks to see if the device data for the lun has been created.
5766  *   2) If found, sets the OAS enabled flag if not set and returns.
5767  *   3) Otherwise, creates a device data structure.
5768  *   4) If successfully created, indicates the device data is for an OAS lun,
5769  *   indicates the lun is not available and add to the list of luns.
5770  *
5771  * Return codes:
5772  *   false - Error
5773  *   true - Success
5774  **/
5775 bool
5776 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5777                     struct lpfc_name *target_wwpn, uint64_t lun)
5778 {
5779
5780         struct lpfc_device_data *lun_info;
5781         unsigned long flags;
5782
5783         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5784             !phba->cfg_fof)
5785                 return false;
5786
5787         spin_lock_irqsave(&phba->devicelock, flags);
5788
5789         /* Check to see if the device data for the lun has been created */
5790         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5791                                           target_wwpn, lun);
5792         if (lun_info) {
5793                 if (!lun_info->oas_enabled)
5794                         lun_info->oas_enabled = true;
5795                 spin_unlock_irqrestore(&phba->devicelock, flags);
5796                 return true;
5797         }
5798
5799         /* Create an lun info structure and add to list of luns */
5800         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5801                                            false);
5802         if (lun_info) {
5803                 lun_info->oas_enabled = true;
5804                 lun_info->available = false;
5805                 list_add_tail(&lun_info->listentry, &phba->luns);
5806                 spin_unlock_irqrestore(&phba->devicelock, flags);
5807                 return true;
5808         }
5809         spin_unlock_irqrestore(&phba->devicelock, flags);
5810         return false;
5811 }
5812
5813 /**
5814  * lpfc_disable_oas_lun - disables a lun for OAS operations
5815  * @pha: Pointer to host bus adapter structure.
5816  * @vport_wwpn: Pointer to vport's wwpn information
5817  * @target_wwpn: Pointer to target's wwpn information
5818  * @lun: Lun
5819  *
5820  * This routine disables a lun for oas operations.  The routines does so by
5821  * doing the following :
5822  *
5823  *   1) Checks to see if the device data for the lun is created.
5824  *   2) If present, clears the flag indicating this lun is for OAS.
5825  *   3) If the lun is not available by the system, the device data is
5826  *   freed.
5827  *
5828  * Return codes:
5829  *   false - Error
5830  *   true - Success
5831  **/
5832 bool
5833 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5834                      struct lpfc_name *target_wwpn, uint64_t lun)
5835 {
5836
5837         struct lpfc_device_data *lun_info;
5838         unsigned long flags;
5839
5840         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5841             !phba->cfg_fof)
5842                 return false;
5843
5844         spin_lock_irqsave(&phba->devicelock, flags);
5845
5846         /* Check to see if the lun is available. */
5847         lun_info = __lpfc_get_device_data(phba,
5848                                           &phba->luns, vport_wwpn,
5849                                           target_wwpn, lun);
5850         if (lun_info) {
5851                 lun_info->oas_enabled = false;
5852                 if (!lun_info->available)
5853                         lpfc_delete_device_data(phba, lun_info);
5854                 spin_unlock_irqrestore(&phba->devicelock, flags);
5855                 return true;
5856         }
5857
5858         spin_unlock_irqrestore(&phba->devicelock, flags);
5859         return false;
5860 }
5861
5862 struct scsi_host_template lpfc_template_s3 = {
5863         .module                 = THIS_MODULE,
5864         .name                   = LPFC_DRIVER_NAME,
5865         .info                   = lpfc_info,
5866         .queuecommand           = lpfc_queuecommand,
5867         .eh_abort_handler       = lpfc_abort_handler,
5868         .eh_device_reset_handler = lpfc_device_reset_handler,
5869         .eh_target_reset_handler = lpfc_target_reset_handler,
5870         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5871         .slave_alloc            = lpfc_slave_alloc,
5872         .slave_configure        = lpfc_slave_configure,
5873         .slave_destroy          = lpfc_slave_destroy,
5874         .scan_finished          = lpfc_scan_finished,
5875         .this_id                = -1,
5876         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5877         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5878         .use_clustering         = ENABLE_CLUSTERING,
5879         .shost_attrs            = lpfc_hba_attrs,
5880         .max_sectors            = 0xFFFF,
5881         .vendor_id              = LPFC_NL_VENDOR_ID,
5882         .change_queue_depth     = scsi_change_queue_depth,
5883         .use_blk_tags           = 1,
5884         .track_queue_depth      = 1,
5885 };
5886
5887 struct scsi_host_template lpfc_template = {
5888         .module                 = THIS_MODULE,
5889         .name                   = LPFC_DRIVER_NAME,
5890         .info                   = lpfc_info,
5891         .queuecommand           = lpfc_queuecommand,
5892         .eh_abort_handler       = lpfc_abort_handler,
5893         .eh_device_reset_handler = lpfc_device_reset_handler,
5894         .eh_target_reset_handler = lpfc_target_reset_handler,
5895         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5896         .eh_host_reset_handler  = lpfc_host_reset_handler,
5897         .slave_alloc            = lpfc_slave_alloc,
5898         .slave_configure        = lpfc_slave_configure,
5899         .slave_destroy          = lpfc_slave_destroy,
5900         .scan_finished          = lpfc_scan_finished,
5901         .this_id                = -1,
5902         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5903         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5904         .use_clustering         = ENABLE_CLUSTERING,
5905         .shost_attrs            = lpfc_hba_attrs,
5906         .max_sectors            = 0xFFFF,
5907         .vendor_id              = LPFC_NL_VENDOR_ID,
5908         .change_queue_depth     = scsi_change_queue_depth,
5909         .use_blk_tags           = 1,
5910         .track_queue_depth      = 1,
5911 };
5912
5913 struct scsi_host_template lpfc_vport_template = {
5914         .module                 = THIS_MODULE,
5915         .name                   = LPFC_DRIVER_NAME,
5916         .info                   = lpfc_info,
5917         .queuecommand           = lpfc_queuecommand,
5918         .eh_abort_handler       = lpfc_abort_handler,
5919         .eh_device_reset_handler = lpfc_device_reset_handler,
5920         .eh_target_reset_handler = lpfc_target_reset_handler,
5921         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5922         .slave_alloc            = lpfc_slave_alloc,
5923         .slave_configure        = lpfc_slave_configure,
5924         .slave_destroy          = lpfc_slave_destroy,
5925         .scan_finished          = lpfc_scan_finished,
5926         .this_id                = -1,
5927         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5928         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5929         .use_clustering         = ENABLE_CLUSTERING,
5930         .shost_attrs            = lpfc_vport_attrs,
5931         .max_sectors            = 0xFFFF,
5932         .change_queue_depth     = scsi_change_queue_depth,
5933         .use_blk_tags           = 1,
5934         .track_queue_depth      = 1,
5935 };