drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2015 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21 #include <linux/pci.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/export.h>
  25 #include <linux/delay.h>
  26 #include <asm/unaligned.h>
  27 #include <linux/crc-t10dif.h>
  28 #include <net/checksum.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_eh.h>
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/scsi_transport_fc.h>
  36
  37 #include "lpfc_version.h"
  38 #include "lpfc_hw4.h"
  39 #include "lpfc_hw.h"
  40 #include "lpfc_sli.h"
  41 #include "lpfc_sli4.h"
  42 #include "lpfc_nl.h"
  43 #include "lpfc_disc.h"
  44 #include "lpfc.h"
  45 #include "lpfc_scsi.h"
  46 #include "lpfc_logmsg.h"
  47 #include "lpfc_crtn.h"
  48 #include "lpfc_vport.h"
  49
  50 #define LPFC_RESET_WAIT  2
  51 #define LPFC_ABORT_WAIT  2
  52
  53 int _dump_buf_done = 1;
  54
  55 static char *dif_op_str[] = {
  56         "PROT_NORMAL",
  57         "PROT_READ_INSERT",
  58         "PROT_WRITE_STRIP",
  59         "PROT_READ_STRIP",
  60         "PROT_WRITE_INSERT",
  61         "PROT_READ_PASS",
  62         "PROT_WRITE_PASS",
  63 };
  64
  65 struct scsi_dif_tuple {
  66         __be16 guard_tag;       /* Checksum */
  67         __be16 app_tag;         /* Opaque storage */
  68         __be32 ref_tag;         /* Target LBA or indirect LBA */
  69 };
  70
  71 static struct lpfc_rport_data *
  72 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
  73 {
  74         struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
  75
  76         if (vport->phba->cfg_fof)
  77                 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
  78         else
  79                 return (struct lpfc_rport_data *)sdev->hostdata;
  80 }
  81
  82 static void
  83 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  84 static void
  85 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  86 static int
  87 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
  88
  89 static void
  90 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  91 {
  92         void *src, *dst;
  93         struct scatterlist *sgde = scsi_sglist(cmnd);
  94
  95         if (!_dump_buf_data) {
  96                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  97                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  98                                 __func__);
  99                 return;
 100         }
 101
 102
 103         if (!sgde) {
 104                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 105                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
 106                 return;
 107         }
 108
 109         dst = (void *) _dump_buf_data;
 110         while (sgde) {
 111                 src = sg_virt(sgde);
 112                 memcpy(dst, src, sgde->length);
 113                 dst += sgde->length;
 114                 sgde = sg_next(sgde);
 115         }
 116 }
 117
 118 static void
 119 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
 120 {
 121         void *src, *dst;
 122         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 123
 124         if (!_dump_buf_dif) {
 125                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 126                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 127                                 __func__);
 128                 return;
 129         }
 130
 131         if (!sgde) {
 132                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 133                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 134                 return;
 135         }
 136
 137         dst = _dump_buf_dif;
 138         while (sgde) {
 139                 src = sg_virt(sgde);
 140                 memcpy(dst, src, sgde->length);
 141                 dst += sgde->length;
 142                 sgde = sg_next(sgde);
 143         }
 144 }
 145
 146 static inline unsigned
 147 lpfc_cmd_blksize(struct scsi_cmnd *sc)
 148 {
 149         return sc->device->sector_size;
 150 }
 151
 152 #define LPFC_CHECK_PROTECT_GUARD        1
 153 #define LPFC_CHECK_PROTECT_REF          2
 154 static inline unsigned
 155 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
 156 {
 157         return 1;
 158 }
 159
 160 static inline unsigned
 161 lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
 162 {
 163         if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
 164                 return 0;
 165         if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
 166                 return 1;
 167         return 0;
 168 }
 169
 170 /**
 171  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 172  * @phba: Pointer to HBA object.
 173  * @lpfc_cmd: lpfc scsi command object pointer.
 174  *
 175  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 176  * set the last bit in the response sge entry.
 177  **/
 178 static void
 179 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 180                                 struct lpfc_scsi_buf *lpfc_cmd)
 181 {
 182         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 183         if (sgl) {
 184                 sgl += 1;
 185                 sgl->word2 = le32_to_cpu(sgl->word2);
 186                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 187                 sgl->word2 = cpu_to_le32(sgl->word2);
 188         }
 189 }
 190
 191 /**
 192  * lpfc_update_stats - Update statistical data for the command completion
 193  * @phba: Pointer to HBA object.
 194  * @lpfc_cmd: lpfc scsi command object pointer.
 195  *
 196  * This function is called when there is a command completion and this
 197  * function updates the statistical data for the command completion.
 198  **/
 199 static void
 200 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 201 {
 202         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 203         struct lpfc_nodelist *pnode = rdata->pnode;
 204         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 205         unsigned long flags;
 206         struct Scsi_Host  *shost = cmd->device->host;
 207         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 208         unsigned long latency;
 209         int i;
 210
 211         if (cmd->result)
 212                 return;
 213
 214         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 215
 216         spin_lock_irqsave(shost->host_lock, flags);
 217         if (!vport->stat_data_enabled ||
 218                 vport->stat_data_blocked ||
 219                 !pnode ||
 220                 !pnode->lat_data ||
 221                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 222                 spin_unlock_irqrestore(shost->host_lock, flags);
 223                 return;
 224         }
 225
 226         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 227                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 228                         phba->bucket_step;
 229                 /* check array subscript bounds */
 230                 if (i < 0)
 231                         i = 0;
 232                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 233                         i = LPFC_MAX_BUCKET_COUNT - 1;
 234         } else {
 235                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 236                         if (latency <= (phba->bucket_base +
 237                                 ((1<<i)*phba->bucket_step)))
 238                                 break;
 239         }
 240
 241         pnode->lat_data[i].cmd_count++;
 242         spin_unlock_irqrestore(shost->host_lock, flags);
 243 }
 244
 245 /**
 246  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 247  * @phba: The Hba for which this call is being executed.
 248  *
 249  * This routine is called when there is resource error in driver or firmware.
 250  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 251  * posts at most 1 event each second. This routine wakes up worker thread of
 252  * @phba to process WORKER_RAM_DOWN_EVENT event.
 253  *
 254  * This routine should be called with no lock held.
 255  **/
 256 void
 257 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 258 {
 259         unsigned long flags;
 260         uint32_t evt_posted;
 261         unsigned long expires;
 262
 263         spin_lock_irqsave(&phba->hbalock, flags);
 264         atomic_inc(&phba->num_rsrc_err);
 265         phba->last_rsrc_error_time = jiffies;
 266
 267         expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
 268         if (time_after(expires, jiffies)) {
 269                 spin_unlock_irqrestore(&phba->hbalock, flags);
 270                 return;
 271         }
 272
 273         phba->last_ramp_down_time = jiffies;
 274
 275         spin_unlock_irqrestore(&phba->hbalock, flags);
 276
 277         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 278         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 279         if (!evt_posted)
 280                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 281         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 282
 283         if (!evt_posted)
 284                 lpfc_worker_wake_up(phba);
 285         return;
 286 }
 287
 288 /**
 289  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 290  * @phba: The Hba for which this call is being executed.
 291  *
 292  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 293  * thread.This routine reduces queue depth for all scsi device on each vport
 294  * associated with @phba.
 295  **/
 296 void
 297 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 298 {
 299         struct lpfc_vport **vports;
 300         struct Scsi_Host  *shost;
 301         struct scsi_device *sdev;
 302         unsigned long new_queue_depth;
 303         unsigned long num_rsrc_err, num_cmd_success;
 304         int i;
 305
 306         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 307         num_cmd_success = atomic_read(&phba->num_cmd_success);
 308
 309         /*
 310          * The error and success command counters are global per
 311          * driver instance.  If another handler has already
 312          * operated on this error event, just exit.
 313          */
 314         if (num_rsrc_err == 0)
 315                 return;
 316
 317         vports = lpfc_create_vport_work_array(phba);
 318         if (vports != NULL)
 319                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 320                         shost = lpfc_shost_from_vport(vports[i]);
 321                         shost_for_each_device(sdev, shost) {
 322                                 new_queue_depth =
 323                                         sdev->queue_depth * num_rsrc_err /
 324                                         (num_rsrc_err + num_cmd_success);
 325                                 if (!new_queue_depth)
 326                                         new_queue_depth = sdev->queue_depth - 1;
 327                                 else
 328                                         new_queue_depth = sdev->queue_depth -
 329                                                                 new_queue_depth;
 330                                 scsi_change_queue_depth(sdev, new_queue_depth);
 331                         }
 332                 }
 333         lpfc_destroy_vport_work_array(phba, vports);
 334         atomic_set(&phba->num_rsrc_err, 0);
 335         atomic_set(&phba->num_cmd_success, 0);
 336 }
 337
 338 /**
 339  * lpfc_scsi_dev_block - set all scsi hosts to block state
 340  * @phba: Pointer to HBA context object.
 341  *
 342  * This function walks vport list and set each SCSI host to block state
 343  * by invoking fc_remote_port_delete() routine. This function is invoked
 344  * with EEH when device's PCI slot has been permanently disabled.
 345  **/
 346 void
 347 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 348 {
 349         struct lpfc_vport **vports;
 350         struct Scsi_Host  *shost;
 351         struct scsi_device *sdev;
 352         struct fc_rport *rport;
 353         int i;
 354
 355         vports = lpfc_create_vport_work_array(phba);
 356         if (vports != NULL)
 357                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 358                         shost = lpfc_shost_from_vport(vports[i]);
 359                         shost_for_each_device(sdev, shost) {
 360                                 rport = starget_to_rport(scsi_target(sdev));
 361                                 fc_remote_port_delete(rport);
 362                         }
 363                 }
 364         lpfc_destroy_vport_work_array(phba, vports);
 365 }
 366
 367 /**
 368  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 369  * @vport: The virtual port for which this call being executed.
 370  * @num_to_allocate: The requested number of buffers to allocate.
 371  *
 372  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 373  * the scsi buffer contains all the necessary information needed to initiate
 374  * a SCSI I/O. The non-DMAable buffer region contains information to build
 375  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 376  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 377  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 378  *
 379  * Return codes:
 380  *   int - number of scsi buffers that were allocated.
 381  *   0 = failure, less than num_to_alloc is a partial failure.
 382  **/
 383 static int
 384 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 385 {
 386         struct lpfc_hba *phba = vport->phba;
 387         struct lpfc_scsi_buf *psb;
 388         struct ulp_bde64 *bpl;
 389         IOCB_t *iocb;
 390         dma_addr_t pdma_phys_fcp_cmd;
 391         dma_addr_t pdma_phys_fcp_rsp;
 392         dma_addr_t pdma_phys_bpl;
 393         uint16_t iotag;
 394         int bcnt, bpl_size;
 395
 396         bpl_size = phba->cfg_sg_dma_buf_size -
 397                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 398
 399         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 400                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 401                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 402                          (int)sizeof(struct fcp_cmnd),
 403                          (int)sizeof(struct fcp_rsp), bpl_size);
 404
 405         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 406                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 407                 if (!psb)
 408                         break;
 409
 410                 /*
 411                  * Get memory from the pci pool to map the virt space to pci
 412                  * bus space for an I/O.  The DMA buffer includes space for the
 413                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 414                  * necessary to support the sg_tablesize.
 415                  */
 416                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 417                                         GFP_KERNEL, &psb->dma_handle);
 418                 if (!psb->data) {
 419                         kfree(psb);
 420                         break;
 421                 }
 422
 423                 /* Initialize virtual ptrs to dma_buf region. */
 424                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 425
 426                 /* Allocate iotag for psb->cur_iocbq. */
 427                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 428                 if (iotag == 0) {
 429                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 430                                         psb->data, psb->dma_handle);
 431                         kfree(psb);
 432                         break;
 433                 }
 434                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 435
 436                 psb->fcp_cmnd = psb->data;
 437                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 438                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 439                         sizeof(struct fcp_rsp);
 440
 441                 /* Initialize local short-hand pointers. */
 442                 bpl = psb->fcp_bpl;
 443                 pdma_phys_fcp_cmd = psb->dma_handle;
 444                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 445                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 446                         sizeof(struct fcp_rsp);
 447
 448                 /*
 449                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 450                  * are sg list bdes.  Initialize the first two and leave the
 451                  * rest for queuecommand.
 452                  */
 453                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 454                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 455                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 456                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 457                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 458
 459                 /* Setup the physical region for the FCP RSP */
 460                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 461                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 462                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 463                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 464                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 465
 466                 /*
 467                  * Since the IOCB for the FCP I/O is built into this
 468                  * lpfc_scsi_buf, initialize it with all known data now.
 469                  */
 470                 iocb = &psb->cur_iocbq.iocb;
 471                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 472                 if ((phba->sli_rev == 3) &&
 473                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 474                         /* fill in immediate fcp command BDE */
 475                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 476                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 477                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 478                                         unsli3.fcp_ext.icd);
 479                         iocb->un.fcpi64.bdl.addrHigh = 0;
 480                         iocb->ulpBdeCount = 0;
 481                         iocb->ulpLe = 0;
 482                         /* fill in response BDE */
 483                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 484                                                         BUFF_TYPE_BDE_64;
 485                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 486                                 sizeof(struct fcp_rsp);
 487                         iocb->unsli3.fcp_ext.rbde.addrLow =
 488                                 putPaddrLow(pdma_phys_fcp_rsp);
 489                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 490                                 putPaddrHigh(pdma_phys_fcp_rsp);
 491                 } else {
 492                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 493                         iocb->un.fcpi64.bdl.bdeSize =
 494                                         (2 * sizeof(struct ulp_bde64));
 495                         iocb->un.fcpi64.bdl.addrLow =
 496                                         putPaddrLow(pdma_phys_bpl);
 497                         iocb->un.fcpi64.bdl.addrHigh =
 498                                         putPaddrHigh(pdma_phys_bpl);
 499                         iocb->ulpBdeCount = 1;
 500                         iocb->ulpLe = 1;
 501                 }
 502                 iocb->ulpClass = CLASS3;
 503                 psb->status = IOSTAT_SUCCESS;
 504                 /* Put it back into the SCSI buffer list */
 505                 psb->cur_iocbq.context1  = psb;
 506                 lpfc_release_scsi_buf_s3(phba, psb);
 507
 508         }
 509
 510         return bcnt;
 511 }
 512
 513 /**
 514  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 515  * @vport: pointer to lpfc vport data structure.
 516  *
 517  * This routine is invoked by the vport cleanup for deletions and the cleanup
 518  * for an ndlp on removal.
 519  **/
 520 void
 521 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 522 {
 523         struct lpfc_hba *phba = vport->phba;
 524         struct lpfc_scsi_buf *psb, *next_psb;
 525         unsigned long iflag = 0;
 526
 527         spin_lock_irqsave(&phba->hbalock, iflag);
 528         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 529         list_for_each_entry_safe(psb, next_psb,
 530                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 531                 if (psb->rdata && psb->rdata->pnode
 532                         && psb->rdata->pnode->vport == vport)
 533                         psb->rdata = NULL;
 534         }
 535         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 536         spin_unlock_irqrestore(&phba->hbalock, iflag);
 537 }
 538
 539 /**
 540  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 541  * @phba: pointer to lpfc hba data structure.
 542  * @axri: pointer to the fcp xri abort wcqe structure.
 543  *
 544  * This routine is invoked by the worker thread to process a SLI4 fast-path
 545  * FCP aborted xri.
 546  **/
 547 void
 548 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 549                           struct sli4_wcqe_xri_aborted *axri)
 550 {
 551         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 552         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 553         struct lpfc_scsi_buf *psb, *next_psb;
 554         unsigned long iflag = 0;
 555         struct lpfc_iocbq *iocbq;
 556         int i;
 557         struct lpfc_nodelist *ndlp;
 558         int rrq_empty = 0;
 559         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 560
 561         spin_lock_irqsave(&phba->hbalock, iflag);
 562         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 563         list_for_each_entry_safe(psb, next_psb,
 564                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 565                 if (psb->cur_iocbq.sli4_xritag == xri) {
 566                         list_del(&psb->list);
 567                         psb->exch_busy = 0;
 568                         psb->status = IOSTAT_SUCCESS;
 569                         spin_unlock(
 570                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 571                         if (psb->rdata && psb->rdata->pnode)
 572                                 ndlp = psb->rdata->pnode;
 573                         else
 574                                 ndlp = NULL;
 575
 576                         rrq_empty = list_empty(&phba->active_rrq_list);
 577                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 578                         if (ndlp) {
 579                                 lpfc_set_rrq_active(phba, ndlp,
 580                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 581                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 582                         }
 583                         lpfc_release_scsi_buf_s4(phba, psb);
 584                         if (rrq_empty)
 585                                 lpfc_worker_wake_up(phba);
 586                         return;
 587                 }
 588         }
 589         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 590         for (i = 1; i <= phba->sli.last_iotag; i++) {
 591                 iocbq = phba->sli.iocbq_lookup[i];
 592
 593                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 594                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 595                         continue;
 596                 if (iocbq->sli4_xritag != xri)
 597                         continue;
 598                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 599                 psb->exch_busy = 0;
 600                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 601                 if (!list_empty(&pring->txq))
 602                         lpfc_worker_wake_up(phba);
 603                 return;
 604
 605         }
 606         spin_unlock_irqrestore(&phba->hbalock, iflag);
 607 }
 608
 609 /**
 610  * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
 611  * @phba: pointer to lpfc hba data structure.
 612  * @post_sblist: pointer to the scsi buffer list.
 613  *
 614  * This routine walks a list of scsi buffers that was passed in. It attempts
 615  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 616  * uses the non-embedded SGL block post mailbox commands to post to the port.
 617  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 618  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 619  * must be local list, thus no lock is needed when manipulate the list.
 620  *
 621  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 622  **/
 623 static int
 624 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 625                              struct list_head *post_sblist, int sb_count)
 626 {
 627         struct lpfc_scsi_buf *psb, *psb_next;
 628         int status, sgl_size;
 629         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 630         dma_addr_t pdma_phys_bpl1;
 631         int last_xritag = NO_XRI;
 632         LIST_HEAD(prep_sblist);
 633         LIST_HEAD(blck_sblist);
 634         LIST_HEAD(scsi_sblist);
 635
 636         /* sanity check */
 637         if (sb_count <= 0)
 638                 return -EINVAL;
 639
 640         sgl_size = phba->cfg_sg_dma_buf_size -
 641                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 642
 643         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 644                 list_del_init(&psb->list);
 645                 block_cnt++;
 646                 if ((last_xritag != NO_XRI) &&
 647                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 648                         /* a hole in xri block, form a sgl posting block */
 649                         list_splice_init(&prep_sblist, &blck_sblist);
 650                         post_cnt = block_cnt - 1;
 651                         /* prepare list for next posting block */
 652                         list_add_tail(&psb->list, &prep_sblist);
 653                         block_cnt = 1;
 654                 } else {
 655                         /* prepare list for next posting block */
 656                         list_add_tail(&psb->list, &prep_sblist);
 657                         /* enough sgls for non-embed sgl mbox command */
 658                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 659                                 list_splice_init(&prep_sblist, &blck_sblist);
 660                                 post_cnt = block_cnt;
 661                                 block_cnt = 0;
 662                         }
 663                 }
 664                 num_posting++;
 665                 last_xritag = psb->cur_iocbq.sli4_xritag;
 666
 667                 /* end of repost sgl list condition for SCSI buffers */
 668                 if (num_posting == sb_count) {
 669                         if (post_cnt == 0) {
 670                                 /* last sgl posting block */
 671                                 list_splice_init(&prep_sblist, &blck_sblist);
 672                                 post_cnt = block_cnt;
 673                         } else if (block_cnt == 1) {
 674                                 /* last single sgl with non-contiguous xri */
 675                                 if (sgl_size > SGL_PAGE_SIZE)
 676                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 677                                                                 SGL_PAGE_SIZE;
 678                                 else
 679                                         pdma_phys_bpl1 = 0;
 680                                 status = lpfc_sli4_post_sgl(phba,
 681                                                 psb->dma_phys_bpl,
 682                                                 pdma_phys_bpl1,
 683                                                 psb->cur_iocbq.sli4_xritag);
 684                                 if (status) {
 685                                         /* failure, put on abort scsi list */
 686                                         psb->exch_busy = 1;
 687                                 } else {
 688                                         /* success, put on SCSI buffer list */
 689                                         psb->exch_busy = 0;
 690                                         psb->status = IOSTAT_SUCCESS;
 691                                         num_posted++;
 692                                 }
 693                                 /* success, put on SCSI buffer sgl list */
 694                                 list_add_tail(&psb->list, &scsi_sblist);
 695                         }
 696                 }
 697
 698                 /* continue until a nembed page worth of sgls */
 699                 if (post_cnt == 0)
 700                         continue;
 701
 702                 /* post block of SCSI buffer list sgls */
 703                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 704                                                        post_cnt);
 705
 706                 /* don't reset xirtag due to hole in xri block */
 707                 if (block_cnt == 0)
 708                         last_xritag = NO_XRI;
 709
 710                 /* reset SCSI buffer post count for next round of posting */
 711                 post_cnt = 0;
 712
 713                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 714                 while (!list_empty(&blck_sblist)) {
 715                         list_remove_head(&blck_sblist, psb,
 716                                          struct lpfc_scsi_buf, list);
 717                         if (status) {
 718                                 /* failure, put on abort scsi list */
 719                                 psb->exch_busy = 1;
 720                         } else {
 721                                 /* success, put on SCSI buffer list */
 722                                 psb->exch_busy = 0;
 723                                 psb->status = IOSTAT_SUCCESS;
 724                                 num_posted++;
 725                         }
 726                         list_add_tail(&psb->list, &scsi_sblist);
 727                 }
 728         }
 729         /* Push SCSI buffers with sgl posted to the availble list */
 730         while (!list_empty(&scsi_sblist)) {
 731                 list_remove_head(&scsi_sblist, psb,
 732                                  struct lpfc_scsi_buf, list);
 733                 lpfc_release_scsi_buf_s4(phba, psb);
 734         }
 735         return num_posted;
 736 }
 737
 738 /**
 739  * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 740  * @phba: pointer to lpfc hba data structure.
 741  *
 742  * This routine walks the list of scsi buffers that have been allocated and
 743  * repost them to the port by using SGL block post. This is needed after a
 744  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 745  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 746  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 747  *
 748  * Returns: 0 = success, non-zero failure.
 749  **/
 750 int
 751 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 752 {
 753         LIST_HEAD(post_sblist);
 754         int num_posted, rc = 0;
 755
 756         /* get all SCSI buffers need to repost to a local list */
 757         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 758         spin_lock(&phba->scsi_buf_list_put_lock);
 759         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 760         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 761         spin_unlock(&phba->scsi_buf_list_put_lock);
 762         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 763
 764         /* post the list of scsi buffer sgls to port if available */
 765         if (!list_empty(&post_sblist)) {
 766                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 767                                                 phba->sli4_hba.scsi_xri_cnt);
 768                 /* failed to post any scsi buffer, return error */
 769                 if (num_posted == 0)
 770                         rc = -EIO;
 771         }
 772         return rc;
 773 }
 774
 775 /**
 776  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 777  * @vport: The virtual port for which this call being executed.
 778  * @num_to_allocate: The requested number of buffers to allocate.
 779  *
 780  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 781  * the scsi buffer contains all the necessary information needed to initiate
 782  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 783  * them on a list, it post them to the port by using SGL block post.
 784  *
 785  * Return codes:
 786  *   int - number of scsi buffers that were allocated and posted.
 787  *   0 = failure, less than num_to_alloc is a partial failure.
 788  **/
 789 static int
 790 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 791 {
 792         struct lpfc_hba *phba = vport->phba;
 793         struct lpfc_scsi_buf *psb;
 794         struct sli4_sge *sgl;
 795         IOCB_t *iocb;
 796         dma_addr_t pdma_phys_fcp_cmd;
 797         dma_addr_t pdma_phys_fcp_rsp;
 798         dma_addr_t pdma_phys_bpl;
 799         uint16_t iotag, lxri = 0;
 800         int bcnt, num_posted, sgl_size;
 801         LIST_HEAD(prep_sblist);
 802         LIST_HEAD(post_sblist);
 803         LIST_HEAD(scsi_sblist);
 804
 805         sgl_size = phba->cfg_sg_dma_buf_size -
 806                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 807
 808         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 809                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 810                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 811                          (int)sizeof(struct fcp_cmnd),
 812                          (int)sizeof(struct fcp_rsp));
 813
 814         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 815                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 816                 if (!psb)
 817                         break;
 818                 /*
 819                  * Get memory from the pci pool to map the virt space to
 820                  * pci bus space for an I/O. The DMA buffer includes space
 821                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 822                  * of bde's necessary to support the sg_tablesize.
 823                  */
 824                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 825                                                 GFP_KERNEL, &psb->dma_handle);
 826                 if (!psb->data) {
 827                         kfree(psb);
 828                         break;
 829                 }
 830                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 831
 832                 /*
 833                  * 4K Page alignment is CRITICAL to BlockGuard, double check
 834                  * to be sure.
 835                  */
 836                 if (phba->cfg_enable_bg  && (((unsigned long)(psb->data) &
 837                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
 838                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 839                                       psb->data, psb->dma_handle);
 840                         kfree(psb);
 841                         break;
 842                 }
 843
 844
 845                 lxri = lpfc_sli4_next_xritag(phba);
 846                 if (lxri == NO_XRI) {
 847                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 848                               psb->data, psb->dma_handle);
 849                         kfree(psb);
 850                         break;
 851                 }
 852
 853                 /* Allocate iotag for psb->cur_iocbq. */
 854                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 855                 if (iotag == 0) {
 856                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 857                                 psb->data, psb->dma_handle);
 858                         kfree(psb);
 859                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
 860                                         "3368 Failed to allocated IOTAG for"
 861                                         " XRI:0x%x\n", lxri);
 862                         lpfc_sli4_free_xri(phba, lxri);
 863                         break;
 864                 }
 865                 psb->cur_iocbq.sli4_lxritag = lxri;
 866                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 867                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 868                 psb->fcp_bpl = psb->data;
 869                 psb->fcp_cmnd = (psb->data + sgl_size);
 870                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
 871                                         sizeof(struct fcp_cmnd));
 872
 873                 /* Initialize local short-hand pointers. */
 874                 sgl = (struct sli4_sge *)psb->fcp_bpl;
 875                 pdma_phys_bpl = psb->dma_handle;
 876                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
 877                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
 878
 879                 /*
 880                  * The first two bdes are the FCP_CMD and FCP_RSP.
 881                  * The balance are sg list bdes. Initialize the
 882                  * first two and leave the rest for queuecommand.
 883                  */
 884                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
 885                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
 886                 sgl->word2 = le32_to_cpu(sgl->word2);
 887                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 888                 sgl->word2 = cpu_to_le32(sgl->word2);
 889                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
 890                 sgl++;
 891
 892                 /* Setup the physical region for the FCP RSP */
 893                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
 894                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
 895                 sgl->word2 = le32_to_cpu(sgl->word2);
 896                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 897                 sgl->word2 = cpu_to_le32(sgl->word2);
 898                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 899
 900                 /*
 901                  * Since the IOCB for the FCP I/O is built into this
 902                  * lpfc_scsi_buf, initialize it with all known data now.
 903                  */
 904                 iocb = &psb->cur_iocbq.iocb;
 905                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 906                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
 907                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
 908                  * We are setting the bpl to point to out sgl. An sgl's
 909                  * entries are 16 bytes, a bpl entries are 12 bytes.
 910                  */
 911                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 912                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
 913                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
 914                 iocb->ulpBdeCount = 1;
 915                 iocb->ulpLe = 1;
 916                 iocb->ulpClass = CLASS3;
 917                 psb->cur_iocbq.context1 = psb;
 918                 psb->dma_phys_bpl = pdma_phys_bpl;
 919
 920                 /* add the scsi buffer to a post list */
 921                 list_add_tail(&psb->list, &post_sblist);
 922                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
 923                 phba->sli4_hba.scsi_xri_cnt++;
 924                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 925         }
 926         lpfc_printf_log(phba, KERN_INFO, LOG_BG,
 927                         "3021 Allocate %d out of %d requested new SCSI "
 928                         "buffers\n", bcnt, num_to_alloc);
 929
 930         /* post the list of scsi buffer sgls to port if available */
 931         if (!list_empty(&post_sblist))
 932                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
 933                                                           &post_sblist, bcnt);
 934         else
 935                 num_posted = 0;
 936
 937         return num_posted;
 938 }
 939
 940 /**
 941  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 942  * @vport: The virtual port for which this call being executed.
 943  * @num_to_allocate: The requested number of buffers to allocate.
 944  *
 945  * This routine wraps the actual SCSI buffer allocator function pointer from
 946  * the lpfc_hba struct.
 947  *
 948  * Return codes:
 949  *   int - number of scsi buffers that were allocated.
 950  *   0 = failure, less than num_to_alloc is a partial failure.
 951  **/
 952 static inline int
 953 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
 954 {
 955         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
 956 }
 957
 958 /**
 959  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 960  * @phba: The HBA for which this call is being executed.
 961  *
 962  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 963  * and returns to caller.
 964  *
 965  * Return codes:
 966  *   NULL - Error
 967  *   Pointer to lpfc_scsi_buf - Success
 968  **/
 969 static struct lpfc_scsi_buf*
 970 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 971 {
 972         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
 973         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
 974         unsigned long iflag = 0;
 975
 976         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
 977         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
 978                          list);
 979         if (!lpfc_cmd) {
 980                 spin_lock(&phba->scsi_buf_list_put_lock);
 981                 list_splice(&phba->lpfc_scsi_buf_list_put,
 982                             &phba->lpfc_scsi_buf_list_get);
 983                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
 984                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
 985                                  struct lpfc_scsi_buf, list);
 986                 spin_unlock(&phba->scsi_buf_list_put_lock);
 987         }
 988         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
 989         return  lpfc_cmd;
 990 }
 991 /**
 992  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 993  * @phba: The HBA for which this call is being executed.
 994  *
 995  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 996  * and returns to caller.
 997  *
 998  * Return codes:
 999  *   NULL - Error
1000  *   Pointer to lpfc_scsi_buf - Success
1001  **/
1002 static struct lpfc_scsi_buf*
1003 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1004 {
1005         struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1006         unsigned long iflag = 0;
1007         int found = 0;
1008
1009         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1010         list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1011                                  &phba->lpfc_scsi_buf_list_get, list) {
1012                 if (lpfc_test_rrq_active(phba, ndlp,
1013                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1014                         continue;
1015                 list_del(&lpfc_cmd->list);
1016                 found = 1;
1017                 break;
1018         }
1019         if (!found) {
1020                 spin_lock(&phba->scsi_buf_list_put_lock);
1021                 list_splice(&phba->lpfc_scsi_buf_list_put,
1022                             &phba->lpfc_scsi_buf_list_get);
1023                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1024                 spin_unlock(&phba->scsi_buf_list_put_lock);
1025                 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
1026                                          &phba->lpfc_scsi_buf_list_get, list) {
1027                         if (lpfc_test_rrq_active(
1028                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1029                                 continue;
1030                         list_del(&lpfc_cmd->list);
1031                         found = 1;
1032                         break;
1033                 }
1034         }
1035         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1036         if (!found)
1037                 return NULL;
1038         return  lpfc_cmd;
1039 }
1040 /**
1041  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1042  * @phba: The HBA for which this call is being executed.
1043  *
1044  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1045  * and returns to caller.
1046  *
1047  * Return codes:
1048  *   NULL - Error
1049  *   Pointer to lpfc_scsi_buf - Success
1050  **/
1051 static struct lpfc_scsi_buf*
1052 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1053 {
1054         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1055 }
1056
1057 /**
1058  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1059  * @phba: The Hba for which this call is being executed.
1060  * @psb: The scsi buffer which is being released.
1061  *
1062  * This routine releases @psb scsi buffer by adding it to tail of @phba
1063  * lpfc_scsi_buf_list list.
1064  **/
1065 static void
1066 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1067 {
1068         unsigned long iflag = 0;
1069
1070         psb->seg_cnt = 0;
1071         psb->nonsg_phys = 0;
1072         psb->prot_seg_cnt = 0;
1073
1074         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1075         psb->pCmd = NULL;
1076         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1077         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1078         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1079 }
1080
1081 /**
1082  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1083  * @phba: The Hba for which this call is being executed.
1084  * @psb: The scsi buffer which is being released.
1085  *
1086  * This routine releases @psb scsi buffer by adding it to tail of @phba
1087  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1088  * and cannot be reused for at least RA_TOV amount of time if it was
1089  * aborted.
1090  **/
1091 static void
1092 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1093 {
1094         unsigned long iflag = 0;
1095
1096         psb->seg_cnt = 0;
1097         psb->nonsg_phys = 0;
1098         psb->prot_seg_cnt = 0;
1099
1100         if (psb->exch_busy) {
1101                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1102                                         iflag);
1103                 psb->pCmd = NULL;
1104                 list_add_tail(&psb->list,
1105                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1106                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1107                                         iflag);
1108         } else {
1109                 psb->pCmd = NULL;
1110                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1111                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1112                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1113                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1114         }
1115 }
1116
1117 /**
1118  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1119  * @phba: The Hba for which this call is being executed.
1120  * @psb: The scsi buffer which is being released.
1121  *
1122  * This routine releases @psb scsi buffer by adding it to tail of @phba
1123  * lpfc_scsi_buf_list list.
1124  **/
1125 static void
1126 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1127 {
1128
1129         phba->lpfc_release_scsi_buf(phba, psb);
1130 }
1131
1132 /**
1133  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1134  * @phba: The Hba for which this call is being executed.
1135  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1136  *
1137  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1138  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1139  * through sg elements and format the bdea. This routine also initializes all
1140  * IOCB fields which are dependent on scsi command request buffer.
1141  *
1142  * Return codes:
1143  *   1 - Error
1144  *   0 - Success
1145  **/
1146 static int
1147 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1148 {
1149         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1150         struct scatterlist *sgel = NULL;
1151         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1152         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1153         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1154         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1155         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1156         dma_addr_t physaddr;
1157         uint32_t num_bde = 0;
1158         int nseg, datadir = scsi_cmnd->sc_data_direction;
1159
1160         /*
1161          * There are three possibilities here - use scatter-gather segment, use
1162          * the single mapping, or neither.  Start the lpfc command prep by
1163          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1164          * data bde entry.
1165          */
1166         bpl += 2;
1167         if (scsi_sg_count(scsi_cmnd)) {
1168                 /*
1169                  * The driver stores the segment count returned from pci_map_sg
1170                  * because this a count of dma-mappings used to map the use_sg
1171                  * pages.  They are not guaranteed to be the same for those
1172                  * architectures that implement an IOMMU.
1173                  */
1174
1175                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1176                                   scsi_sg_count(scsi_cmnd), datadir);
1177                 if (unlikely(!nseg))
1178                         return 1;
1179
1180                 lpfc_cmd->seg_cnt = nseg;
1181                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1182                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1183                                 "9064 BLKGRD: %s: Too many sg segments from "
1184                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1185                                __func__, phba->cfg_sg_seg_cnt,
1186                                lpfc_cmd->seg_cnt);
1187                         lpfc_cmd->seg_cnt = 0;
1188                         scsi_dma_unmap(scsi_cmnd);
1189                         return 1;
1190                 }
1191
1192                 /*
1193                  * The driver established a maximum scatter-gather segment count
1194                  * during probe that limits the number of sg elements in any
1195                  * single scsi command.  Just run through the seg_cnt and format
1196                  * the bde's.
1197                  * When using SLI-3 the driver will try to fit all the BDEs into
1198                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1199                  * does for SLI-2 mode.
1200                  */
1201                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1202                         physaddr = sg_dma_address(sgel);
1203                         if (phba->sli_rev == 3 &&
1204                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1205                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1206                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1207                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1208                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1209                                 data_bde->addrLow = putPaddrLow(physaddr);
1210                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1211                                 data_bde++;
1212                         } else {
1213                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1214                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1215                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1216                                 bpl->addrLow =
1217                                         le32_to_cpu(putPaddrLow(physaddr));
1218                                 bpl->addrHigh =
1219                                         le32_to_cpu(putPaddrHigh(physaddr));
1220                                 bpl++;
1221                         }
1222                 }
1223         }
1224
1225         /*
1226          * Finish initializing those IOCB fields that are dependent on the
1227          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1228          * explicitly reinitialized and for SLI-3 the extended bde count is
1229          * explicitly reinitialized since all iocb memory resources are reused.
1230          */
1231         if (phba->sli_rev == 3 &&
1232             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1233             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1234                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1235                         /*
1236                          * The extended IOCB format can only fit 3 BDE or a BPL.
1237                          * This I/O has more than 3 BDE so the 1st data bde will
1238                          * be a BPL that is filled in here.
1239                          */
1240                         physaddr = lpfc_cmd->dma_handle;
1241                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1242                         data_bde->tus.f.bdeSize = (num_bde *
1243                                                    sizeof(struct ulp_bde64));
1244                         physaddr += (sizeof(struct fcp_cmnd) +
1245                                      sizeof(struct fcp_rsp) +
1246                                      (2 * sizeof(struct ulp_bde64)));
1247                         data_bde->addrHigh = putPaddrHigh(physaddr);
1248                         data_bde->addrLow = putPaddrLow(physaddr);
1249                         /* ebde count includes the response bde and data bpl */
1250                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1251                 } else {
1252                         /* ebde count includes the response bde and data bdes */
1253                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1254                 }
1255         } else {
1256                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1257                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1258                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1259         }
1260         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1261
1262         /*
1263          * Due to difference in data length between DIF/non-DIF paths,
1264          * we need to set word 4 of IOCB here
1265          */
1266         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1267         return 0;
1268 }
1269
1270 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1271
1272 /* Return if if error injection is detected by Initiator */
1273 #define BG_ERR_INIT     0x1
1274 /* Return if if error injection is detected by Target */
1275 #define BG_ERR_TGT      0x2
1276 /* Return if if swapping CSUM<-->CRC is required for error injection */
1277 #define BG_ERR_SWAP     0x10
1278 /* Return if disabling Guard/Ref/App checking is required for error injection */
1279 #define BG_ERR_CHECK    0x20
1280
1281 /**
1282  * lpfc_bg_err_inject - Determine if we should inject an error
1283  * @phba: The Hba for which this call is being executed.
1284  * @sc: The SCSI command to examine
1285  * @reftag: (out) BlockGuard reference tag for transmitted data
1286  * @apptag: (out) BlockGuard application tag for transmitted data
1287  * @new_guard (in) Value to replace CRC with if needed
1288  *
1289  * Returns BG_ERR_* bit mask or 0 if request ignored
1290  **/
1291 static int
1292 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1293                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1294 {
1295         struct scatterlist *sgpe; /* s/g prot entry */
1296         struct scatterlist *sgde; /* s/g data entry */
1297         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1298         struct scsi_dif_tuple *src = NULL;
1299         struct lpfc_nodelist *ndlp;
1300         struct lpfc_rport_data *rdata;
1301         uint32_t op = scsi_get_prot_op(sc);
1302         uint32_t blksize;
1303         uint32_t numblks;
1304         sector_t lba;
1305         int rc = 0;
1306         int blockoff = 0;
1307
1308         if (op == SCSI_PROT_NORMAL)
1309                 return 0;
1310
1311         sgpe = scsi_prot_sglist(sc);
1312         sgde = scsi_sglist(sc);
1313         lba = scsi_get_lba(sc);
1314
1315         /* First check if we need to match the LBA */
1316         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1317                 blksize = lpfc_cmd_blksize(sc);
1318                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1319
1320                 /* Make sure we have the right LBA if one is specified */
1321                 if ((phba->lpfc_injerr_lba < lba) ||
1322                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1323                         return 0;
1324                 if (sgpe) {
1325                         blockoff = phba->lpfc_injerr_lba - lba;
1326                         numblks = sg_dma_len(sgpe) /
1327                                 sizeof(struct scsi_dif_tuple);
1328                         if (numblks < blockoff)
1329                                 blockoff = numblks;
1330                 }
1331         }
1332
1333         /* Next check if we need to match the remote NPortID or WWPN */
1334         rdata = lpfc_rport_data_from_scsi_device(sc->device);
1335         if (rdata && rdata->pnode) {
1336                 ndlp = rdata->pnode;
1337
1338                 /* Make sure we have the right NPortID if one is specified */
1339                 if (phba->lpfc_injerr_nportid  &&
1340                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1341                         return 0;
1342
1343                 /*
1344                  * Make sure we have the right WWPN if one is specified.
1345                  * wwn[0] should be a non-zero NAA in a good WWPN.
1346                  */
1347                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1348                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1349                                 sizeof(struct lpfc_name)) != 0))
1350                         return 0;
1351         }
1352
1353         /* Setup a ptr to the protection data if the SCSI host provides it */
1354         if (sgpe) {
1355                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1356                 src += blockoff;
1357                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1358         }
1359
1360         /* Should we change the Reference Tag */
1361         if (reftag) {
1362                 if (phba->lpfc_injerr_wref_cnt) {
1363                         switch (op) {
1364                         case SCSI_PROT_WRITE_PASS:
1365                                 if (src) {
1366                                         /*
1367                                          * For WRITE_PASS, force the error
1368                                          * to be sent on the wire. It should
1369                                          * be detected by the Target.
1370                                          * If blockoff != 0 error will be
1371                                          * inserted in middle of the IO.
1372                                          */
1373
1374                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1375                                         "9076 BLKGRD: Injecting reftag error: "
1376                                         "write lba x%lx + x%x oldrefTag x%x\n",
1377                                         (unsigned long)lba, blockoff,
1378                                         be32_to_cpu(src->ref_tag));
1379
1380                                         /*
1381                                          * Save the old ref_tag so we can
1382                                          * restore it on completion.
1383                                          */
1384                                         if (lpfc_cmd) {
1385                                                 lpfc_cmd->prot_data_type =
1386                                                         LPFC_INJERR_REFTAG;
1387                                                 lpfc_cmd->prot_data_segment =
1388                                                         src;
1389                                                 lpfc_cmd->prot_data =
1390                                                         src->ref_tag;
1391                                         }
1392                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1393                                         phba->lpfc_injerr_wref_cnt--;
1394                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1395                                                 phba->lpfc_injerr_nportid = 0;
1396                                                 phba->lpfc_injerr_lba =
1397                                                         LPFC_INJERR_LBA_OFF;
1398                                                 memset(&phba->lpfc_injerr_wwpn,
1399                                                   0, sizeof(struct lpfc_name));
1400                                         }
1401                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1402
1403                                         break;
1404                                 }
1405                                 /* Drop thru */
1406                         case SCSI_PROT_WRITE_INSERT:
1407                                 /*
1408                                  * For WRITE_INSERT, force the error
1409                                  * to be sent on the wire. It should be
1410                                  * detected by the Target.
1411                                  */
1412                                 /* DEADBEEF will be the reftag on the wire */
1413                                 *reftag = 0xDEADBEEF;
1414                                 phba->lpfc_injerr_wref_cnt--;
1415                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1416                                         phba->lpfc_injerr_nportid = 0;
1417                                         phba->lpfc_injerr_lba =
1418                                         LPFC_INJERR_LBA_OFF;
1419                                         memset(&phba->lpfc_injerr_wwpn,
1420                                                 0, sizeof(struct lpfc_name));
1421                                 }
1422                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1423
1424                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1425                                         "9078 BLKGRD: Injecting reftag error: "
1426                                         "write lba x%lx\n", (unsigned long)lba);
1427                                 break;
1428                         case SCSI_PROT_WRITE_STRIP:
1429                                 /*
1430                                  * For WRITE_STRIP and WRITE_PASS,
1431                                  * force the error on data
1432                                  * being copied from SLI-Host to SLI-Port.
1433                                  */
1434                                 *reftag = 0xDEADBEEF;
1435                                 phba->lpfc_injerr_wref_cnt--;
1436                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1437                                         phba->lpfc_injerr_nportid = 0;
1438                                         phba->lpfc_injerr_lba =
1439                                                 LPFC_INJERR_LBA_OFF;
1440                                         memset(&phba->lpfc_injerr_wwpn,
1441                                                 0, sizeof(struct lpfc_name));
1442                                 }
1443                                 rc = BG_ERR_INIT;
1444
1445                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1446                                         "9077 BLKGRD: Injecting reftag error: "
1447                                         "write lba x%lx\n", (unsigned long)lba);
1448                                 break;
1449                         }
1450                 }
1451                 if (phba->lpfc_injerr_rref_cnt) {
1452                         switch (op) {
1453                         case SCSI_PROT_READ_INSERT:
1454                         case SCSI_PROT_READ_STRIP:
1455                         case SCSI_PROT_READ_PASS:
1456                                 /*
1457                                  * For READ_STRIP and READ_PASS, force the
1458                                  * error on data being read off the wire. It
1459                                  * should force an IO error to the driver.
1460                                  */
1461                                 *reftag = 0xDEADBEEF;
1462                                 phba->lpfc_injerr_rref_cnt--;
1463                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1464                                         phba->lpfc_injerr_nportid = 0;
1465                                         phba->lpfc_injerr_lba =
1466                                                 LPFC_INJERR_LBA_OFF;
1467                                         memset(&phba->lpfc_injerr_wwpn,
1468                                                 0, sizeof(struct lpfc_name));
1469                                 }
1470                                 rc = BG_ERR_INIT;
1471
1472                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1473                                         "9079 BLKGRD: Injecting reftag error: "
1474                                         "read lba x%lx\n", (unsigned long)lba);
1475                                 break;
1476                         }
1477                 }
1478         }
1479
1480         /* Should we change the Application Tag */
1481         if (apptag) {
1482                 if (phba->lpfc_injerr_wapp_cnt) {
1483                         switch (op) {
1484                         case SCSI_PROT_WRITE_PASS:
1485                                 if (src) {
1486                                         /*
1487                                          * For WRITE_PASS, force the error
1488                                          * to be sent on the wire. It should
1489                                          * be detected by the Target.
1490                                          * If blockoff != 0 error will be
1491                                          * inserted in middle of the IO.
1492                                          */
1493
1494                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1495                                         "9080 BLKGRD: Injecting apptag error: "
1496                                         "write lba x%lx + x%x oldappTag x%x\n",
1497                                         (unsigned long)lba, blockoff,
1498                                         be16_to_cpu(src->app_tag));
1499
1500                                         /*
1501                                          * Save the old app_tag so we can
1502                                          * restore it on completion.
1503                                          */
1504                                         if (lpfc_cmd) {
1505                                                 lpfc_cmd->prot_data_type =
1506                                                         LPFC_INJERR_APPTAG;
1507                                                 lpfc_cmd->prot_data_segment =
1508                                                         src;
1509                                                 lpfc_cmd->prot_data =
1510                                                         src->app_tag;
1511                                         }
1512                                         src->app_tag = cpu_to_be16(0xDEAD);
1513                                         phba->lpfc_injerr_wapp_cnt--;
1514                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1515                                                 phba->lpfc_injerr_nportid = 0;
1516                                                 phba->lpfc_injerr_lba =
1517                                                         LPFC_INJERR_LBA_OFF;
1518                                                 memset(&phba->lpfc_injerr_wwpn,
1519                                                   0, sizeof(struct lpfc_name));
1520                                         }
1521                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1522                                         break;
1523                                 }
1524                                 /* Drop thru */
1525                         case SCSI_PROT_WRITE_INSERT:
1526                                 /*
1527                                  * For WRITE_INSERT, force the
1528                                  * error to be sent on the wire. It should be
1529                                  * detected by the Target.
1530                                  */
1531                                 /* DEAD will be the apptag on the wire */
1532                                 *apptag = 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
1543                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1544                                         "0813 BLKGRD: Injecting apptag error: "
1545                                         "write lba x%lx\n", (unsigned long)lba);
1546                                 break;
1547                         case SCSI_PROT_WRITE_STRIP:
1548                                 /*
1549                                  * For WRITE_STRIP and WRITE_PASS,
1550                                  * force the error on data
1551                                  * being copied from SLI-Host to SLI-Port.
1552                                  */
1553                                 *apptag = 0xDEAD;
1554                                 phba->lpfc_injerr_wapp_cnt--;
1555                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1556                                         phba->lpfc_injerr_nportid = 0;
1557                                         phba->lpfc_injerr_lba =
1558                                                 LPFC_INJERR_LBA_OFF;
1559                                         memset(&phba->lpfc_injerr_wwpn,
1560                                                 0, sizeof(struct lpfc_name));
1561                                 }
1562                                 rc = BG_ERR_INIT;
1563
1564                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1565                                         "0812 BLKGRD: Injecting apptag error: "
1566                                         "write lba x%lx\n", (unsigned long)lba);
1567                                 break;
1568                         }
1569                 }
1570                 if (phba->lpfc_injerr_rapp_cnt) {
1571                         switch (op) {
1572                         case SCSI_PROT_READ_INSERT:
1573                         case SCSI_PROT_READ_STRIP:
1574                         case SCSI_PROT_READ_PASS:
1575                                 /*
1576                                  * For READ_STRIP and READ_PASS, force the
1577                                  * error on data being read off the wire. It
1578                                  * should force an IO error to the driver.
1579                                  */
1580                                 *apptag = 0xDEAD;
1581                                 phba->lpfc_injerr_rapp_cnt--;
1582                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1583                                         phba->lpfc_injerr_nportid = 0;
1584                                         phba->lpfc_injerr_lba =
1585                                                 LPFC_INJERR_LBA_OFF;
1586                                         memset(&phba->lpfc_injerr_wwpn,
1587                                                 0, sizeof(struct lpfc_name));
1588                                 }
1589                                 rc = BG_ERR_INIT;
1590
1591                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1592                                         "0814 BLKGRD: Injecting apptag error: "
1593                                         "read lba x%lx\n", (unsigned long)lba);
1594                                 break;
1595                         }
1596                 }
1597         }
1598
1599
1600         /* Should we change the Guard Tag */
1601         if (new_guard) {
1602                 if (phba->lpfc_injerr_wgrd_cnt) {
1603                         switch (op) {
1604                         case SCSI_PROT_WRITE_PASS:
1605                                 rc = BG_ERR_CHECK;
1606                                 /* Drop thru */
1607
1608                         case SCSI_PROT_WRITE_INSERT:
1609                                 /*
1610                                  * For WRITE_INSERT, force the
1611                                  * error to be sent on the wire. It should be
1612                                  * detected by the Target.
1613                                  */
1614                                 phba->lpfc_injerr_wgrd_cnt--;
1615                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1616                                         phba->lpfc_injerr_nportid = 0;
1617                                         phba->lpfc_injerr_lba =
1618                                                 LPFC_INJERR_LBA_OFF;
1619                                         memset(&phba->lpfc_injerr_wwpn,
1620                                                 0, sizeof(struct lpfc_name));
1621                                 }
1622
1623                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1624                                 /* Signals the caller to swap CRC->CSUM */
1625
1626                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1627                                         "0817 BLKGRD: Injecting guard error: "
1628                                         "write lba x%lx\n", (unsigned long)lba);
1629                                 break;
1630                         case SCSI_PROT_WRITE_STRIP:
1631                                 /*
1632                                  * For WRITE_STRIP and WRITE_PASS,
1633                                  * force the error on data
1634                                  * being copied from SLI-Host to SLI-Port.
1635                                  */
1636                                 phba->lpfc_injerr_wgrd_cnt--;
1637                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1638                                         phba->lpfc_injerr_nportid = 0;
1639                                         phba->lpfc_injerr_lba =
1640                                                 LPFC_INJERR_LBA_OFF;
1641                                         memset(&phba->lpfc_injerr_wwpn,
1642                                                 0, sizeof(struct lpfc_name));
1643                                 }
1644
1645                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1646                                 /* Signals the caller to swap CRC->CSUM */
1647
1648                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1649                                         "0816 BLKGRD: Injecting guard error: "
1650                                         "write lba x%lx\n", (unsigned long)lba);
1651                                 break;
1652                         }
1653                 }
1654                 if (phba->lpfc_injerr_rgrd_cnt) {
1655                         switch (op) {
1656                         case SCSI_PROT_READ_INSERT:
1657                         case SCSI_PROT_READ_STRIP:
1658                         case SCSI_PROT_READ_PASS:
1659                                 /*
1660                                  * For READ_STRIP and READ_PASS, force the
1661                                  * error on data being read off the wire. It
1662                                  * should force an IO error to the driver.
1663                                  */
1664                                 phba->lpfc_injerr_rgrd_cnt--;
1665                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1666                                         phba->lpfc_injerr_nportid = 0;
1667                                         phba->lpfc_injerr_lba =
1668                                                 LPFC_INJERR_LBA_OFF;
1669                                         memset(&phba->lpfc_injerr_wwpn,
1670                                                 0, sizeof(struct lpfc_name));
1671                                 }
1672
1673                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1674                                 /* Signals the caller to swap CRC->CSUM */
1675
1676                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1677                                         "0818 BLKGRD: Injecting guard error: "
1678                                         "read lba x%lx\n", (unsigned long)lba);
1679                         }
1680                 }
1681         }
1682
1683         return rc;
1684 }
1685 #endif
1686
1687 /**
1688  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1689  * the specified SCSI command.
1690  * @phba: The Hba for which this call is being executed.
1691  * @sc: The SCSI command to examine
1692  * @txopt: (out) BlockGuard operation for transmitted data
1693  * @rxopt: (out) BlockGuard operation for received data
1694  *
1695  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1696  *
1697  **/
1698 static int
1699 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1700                 uint8_t *txop, uint8_t *rxop)
1701 {
1702         uint8_t ret = 0;
1703
1704         if (lpfc_cmd_guard_csum(sc)) {
1705                 switch (scsi_get_prot_op(sc)) {
1706                 case SCSI_PROT_READ_INSERT:
1707                 case SCSI_PROT_WRITE_STRIP:
1708                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1709                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1710                         break;
1711
1712                 case SCSI_PROT_READ_STRIP:
1713                 case SCSI_PROT_WRITE_INSERT:
1714                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1715                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1716                         break;
1717
1718                 case SCSI_PROT_READ_PASS:
1719                 case SCSI_PROT_WRITE_PASS:
1720                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1721                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1722                         break;
1723
1724                 case SCSI_PROT_NORMAL:
1725                 default:
1726                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1727                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1728                                         scsi_get_prot_op(sc));
1729                         ret = 1;
1730                         break;
1731
1732                 }
1733         } else {
1734                 switch (scsi_get_prot_op(sc)) {
1735                 case SCSI_PROT_READ_STRIP:
1736                 case SCSI_PROT_WRITE_INSERT:
1737                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1738                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1739                         break;
1740
1741                 case SCSI_PROT_READ_PASS:
1742                 case SCSI_PROT_WRITE_PASS:
1743                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1744                         *txop = BG_OP_IN_CRC_OUT_CRC;
1745                         break;
1746
1747                 case SCSI_PROT_READ_INSERT:
1748                 case SCSI_PROT_WRITE_STRIP:
1749                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1750                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1751                         break;
1752
1753                 case SCSI_PROT_NORMAL:
1754                 default:
1755                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1756                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1757                                         scsi_get_prot_op(sc));
1758                         ret = 1;
1759                         break;
1760                 }
1761         }
1762
1763         return ret;
1764 }
1765
1766 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1767 /**
1768  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1769  * the specified SCSI command in order to force a guard tag error.
1770  * @phba: The Hba for which this call is being executed.
1771  * @sc: The SCSI command to examine
1772  * @txopt: (out) BlockGuard operation for transmitted data
1773  * @rxopt: (out) BlockGuard operation for received data
1774  *
1775  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1776  *
1777  **/
1778 static int
1779 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1780                 uint8_t *txop, uint8_t *rxop)
1781 {
1782         uint8_t ret = 0;
1783
1784         if (lpfc_cmd_guard_csum(sc)) {
1785                 switch (scsi_get_prot_op(sc)) {
1786                 case SCSI_PROT_READ_INSERT:
1787                 case SCSI_PROT_WRITE_STRIP:
1788                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1789                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1790                         break;
1791
1792                 case SCSI_PROT_READ_STRIP:
1793                 case SCSI_PROT_WRITE_INSERT:
1794                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1795                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1796                         break;
1797
1798                 case SCSI_PROT_READ_PASS:
1799                 case SCSI_PROT_WRITE_PASS:
1800                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1801                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1802                         break;
1803
1804                 case SCSI_PROT_NORMAL:
1805                 default:
1806                         break;
1807
1808                 }
1809         } else {
1810                 switch (scsi_get_prot_op(sc)) {
1811                 case SCSI_PROT_READ_STRIP:
1812                 case SCSI_PROT_WRITE_INSERT:
1813                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1814                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1815                         break;
1816
1817                 case SCSI_PROT_READ_PASS:
1818                 case SCSI_PROT_WRITE_PASS:
1819                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1820                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1821                         break;
1822
1823                 case SCSI_PROT_READ_INSERT:
1824                 case SCSI_PROT_WRITE_STRIP:
1825                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1826                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1827                         break;
1828
1829                 case SCSI_PROT_NORMAL:
1830                 default:
1831                         break;
1832                 }
1833         }
1834
1835         return ret;
1836 }
1837 #endif
1838
1839 /**
1840  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1841  * @phba: The Hba for which this call is being executed.
1842  * @sc: pointer to scsi command we're working on
1843  * @bpl: pointer to buffer list for protection groups
1844  * @datacnt: number of segments of data that have been dma mapped
1845  *
1846  * This function sets up BPL buffer list for protection groups of
1847  * type LPFC_PG_TYPE_NO_DIF
1848  *
1849  * This is usually used when the HBA is instructed to generate
1850  * DIFs and insert them into data stream (or strip DIF from
1851  * incoming data stream)
1852  *
1853  * The buffer list consists of just one protection group described
1854  * below:
1855  *                                +-------------------------+
1856  *   start of prot group  -->     |          PDE_5          |
1857  *                                +-------------------------+
1858  *                                |          PDE_6          |
1859  *                                +-------------------------+
1860  *                                |         Data BDE        |
1861  *                                +-------------------------+
1862  *                                |more Data BDE's ... (opt)|
1863  *                                +-------------------------+
1864  *
1865  *
1866  * Note: Data s/g buffers have been dma mapped
1867  *
1868  * Returns the number of BDEs added to the BPL.
1869  **/
1870 static int
1871 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1872                 struct ulp_bde64 *bpl, int datasegcnt)
1873 {
1874         struct scatterlist *sgde = NULL; /* s/g data entry */
1875         struct lpfc_pde5 *pde5 = NULL;
1876         struct lpfc_pde6 *pde6 = NULL;
1877         dma_addr_t physaddr;
1878         int i = 0, num_bde = 0, status;
1879         int datadir = sc->sc_data_direction;
1880 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1881         uint32_t rc;
1882 #endif
1883         uint32_t checking = 1;
1884         uint32_t reftag;
1885         unsigned blksize;
1886         uint8_t txop, rxop;
1887
1888         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
1889         if (status)
1890                 goto out;
1891
1892         /* extract some info from the scsi command for pde*/
1893         blksize = lpfc_cmd_blksize(sc);
1894         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1895
1896 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1897         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1898         if (rc) {
1899                 if (rc & BG_ERR_SWAP)
1900                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1901                 if (rc & BG_ERR_CHECK)
1902                         checking = 0;
1903         }
1904 #endif
1905
1906         /* setup PDE5 with what we have */
1907         pde5 = (struct lpfc_pde5 *) bpl;
1908         memset(pde5, 0, sizeof(struct lpfc_pde5));
1909         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1910
1911         /* Endianness conversion if necessary for PDE5 */
1912         pde5->word0 = cpu_to_le32(pde5->word0);
1913         pde5->reftag = cpu_to_le32(reftag);
1914
1915         /* advance bpl and increment bde count */
1916         num_bde++;
1917         bpl++;
1918         pde6 = (struct lpfc_pde6 *) bpl;
1919
1920         /* setup PDE6 with the rest of the info */
1921         memset(pde6, 0, sizeof(struct lpfc_pde6));
1922         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
1923         bf_set(pde6_optx, pde6, txop);
1924         bf_set(pde6_oprx, pde6, rxop);
1925
1926         /*
1927          * We only need to check the data on READs, for WRITEs
1928          * protection data is automatically generated, not checked.
1929          */
1930         if (datadir == DMA_FROM_DEVICE) {
1931                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1932                         bf_set(pde6_ce, pde6, checking);
1933                 else
1934                         bf_set(pde6_ce, pde6, 0);
1935
1936                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1937                         bf_set(pde6_re, pde6, checking);
1938                 else
1939                         bf_set(pde6_re, pde6, 0);
1940         }
1941         bf_set(pde6_ai, pde6, 1);
1942         bf_set(pde6_ae, pde6, 0);
1943         bf_set(pde6_apptagval, pde6, 0);
1944
1945         /* Endianness conversion if necessary for PDE6 */
1946         pde6->word0 = cpu_to_le32(pde6->word0);
1947         pde6->word1 = cpu_to_le32(pde6->word1);
1948         pde6->word2 = cpu_to_le32(pde6->word2);
1949
1950         /* advance bpl and increment bde count */
1951         num_bde++;
1952         bpl++;
1953
1954         /* assumption: caller has already run dma_map_sg on command data */
1955         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
1956                 physaddr = sg_dma_address(sgde);
1957                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
1958                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
1959                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
1960                 if (datadir == DMA_TO_DEVICE)
1961                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1962                 else
1963                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
1964                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1965                 bpl++;
1966                 num_bde++;
1967         }
1968
1969 out:
1970         return num_bde;
1971 }
1972
1973 /**
1974  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
1975  * @phba: The Hba for which this call is being executed.
1976  * @sc: pointer to scsi command we're working on
1977  * @bpl: pointer to buffer list for protection groups
1978  * @datacnt: number of segments of data that have been dma mapped
1979  * @protcnt: number of segment of protection data that have been dma mapped
1980  *
1981  * This function sets up BPL buffer list for protection groups of
1982  * type LPFC_PG_TYPE_DIF
1983  *
1984  * This is usually used when DIFs are in their own buffers,
1985  * separate from the data. The HBA can then by instructed
1986  * to place the DIFs in the outgoing stream.  For read operations,
1987  * The HBA could extract the DIFs and place it in DIF buffers.
1988  *
1989  * The buffer list for this type consists of one or more of the
1990  * protection groups described below:
1991  *                                    +-------------------------+
1992  *   start of first prot group  -->   |          PDE_5          |
1993  *                                    +-------------------------+
1994  *                                    |          PDE_6          |
1995  *                                    +-------------------------+
1996  *                                    |      PDE_7 (Prot BDE)   |
1997  *                                    +-------------------------+
1998  *                                    |        Data BDE         |
1999  *                                    +-------------------------+
2000  *                                    |more Data BDE's ... (opt)|
2001  *                                    +-------------------------+
2002  *   start of new  prot group  -->    |          PDE_5          |
2003  *                                    +-------------------------+
2004  *                                    |          ...            |
2005  *                                    +-------------------------+
2006  *
2007  * Note: It is assumed that both data and protection s/g buffers have been
2008  *       mapped for DMA
2009  *
2010  * Returns the number of BDEs added to the BPL.
2011  **/
2012 static int
2013 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2014                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2015 {
2016         struct scatterlist *sgde = NULL; /* s/g data entry */
2017         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2018         struct lpfc_pde5 *pde5 = NULL;
2019         struct lpfc_pde6 *pde6 = NULL;
2020         struct lpfc_pde7 *pde7 = NULL;
2021         dma_addr_t dataphysaddr, protphysaddr;
2022         unsigned short curr_data = 0, curr_prot = 0;
2023         unsigned int split_offset;
2024         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2025         unsigned int protgrp_blks, protgrp_bytes;
2026         unsigned int remainder, subtotal;
2027         int status;
2028         int datadir = sc->sc_data_direction;
2029         unsigned char pgdone = 0, alldone = 0;
2030         unsigned blksize;
2031 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2032         uint32_t rc;
2033 #endif
2034         uint32_t checking = 1;
2035         uint32_t reftag;
2036         uint8_t txop, rxop;
2037         int num_bde = 0;
2038
2039         sgpe = scsi_prot_sglist(sc);
2040         sgde = scsi_sglist(sc);
2041
2042         if (!sgpe || !sgde) {
2043                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2044                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2045                                 sgpe, sgde);
2046                 return 0;
2047         }
2048
2049         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2050         if (status)
2051                 goto out;
2052
2053         /* extract some info from the scsi command */
2054         blksize = lpfc_cmd_blksize(sc);
2055         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2056
2057 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2058         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2059         if (rc) {
2060                 if (rc & BG_ERR_SWAP)
2061                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2062                 if (rc & BG_ERR_CHECK)
2063                         checking = 0;
2064         }
2065 #endif
2066
2067         split_offset = 0;
2068         do {
2069                 /* Check to see if we ran out of space */
2070                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2071                         return num_bde + 3;
2072
2073                 /* setup PDE5 with what we have */
2074                 pde5 = (struct lpfc_pde5 *) bpl;
2075                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2076                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2077
2078                 /* Endianness conversion if necessary for PDE5 */
2079                 pde5->word0 = cpu_to_le32(pde5->word0);
2080                 pde5->reftag = cpu_to_le32(reftag);
2081
2082                 /* advance bpl and increment bde count */
2083                 num_bde++;
2084                 bpl++;
2085                 pde6 = (struct lpfc_pde6 *) bpl;
2086
2087                 /* setup PDE6 with the rest of the info */
2088                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2089                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2090                 bf_set(pde6_optx, pde6, txop);
2091                 bf_set(pde6_oprx, pde6, rxop);
2092
2093                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2094                         bf_set(pde6_ce, pde6, checking);
2095                 else
2096                         bf_set(pde6_ce, pde6, 0);
2097
2098                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2099                         bf_set(pde6_re, pde6, checking);
2100                 else
2101                         bf_set(pde6_re, pde6, 0);
2102
2103                 bf_set(pde6_ai, pde6, 1);
2104                 bf_set(pde6_ae, pde6, 0);
2105                 bf_set(pde6_apptagval, pde6, 0);
2106
2107                 /* Endianness conversion if necessary for PDE6 */
2108                 pde6->word0 = cpu_to_le32(pde6->word0);
2109                 pde6->word1 = cpu_to_le32(pde6->word1);
2110                 pde6->word2 = cpu_to_le32(pde6->word2);
2111
2112                 /* advance bpl and increment bde count */
2113                 num_bde++;
2114                 bpl++;
2115
2116                 /* setup the first BDE that points to protection buffer */
2117                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2118                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2119
2120                 /* must be integer multiple of the DIF block length */
2121                 BUG_ON(protgroup_len % 8);
2122
2123                 pde7 = (struct lpfc_pde7 *) bpl;
2124                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2125                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2126
2127                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2128                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2129
2130                 protgrp_blks = protgroup_len / 8;
2131                 protgrp_bytes = protgrp_blks * blksize;
2132
2133                 /* check if this pde is crossing the 4K boundary; if so split */
2134                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2135                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2136                         protgroup_offset += protgroup_remainder;
2137                         protgrp_blks = protgroup_remainder / 8;
2138                         protgrp_bytes = protgrp_blks * blksize;
2139                 } else {
2140                         protgroup_offset = 0;
2141                         curr_prot++;
2142                 }
2143
2144                 num_bde++;
2145
2146                 /* setup BDE's for data blocks associated with DIF data */
2147                 pgdone = 0;
2148                 subtotal = 0; /* total bytes processed for current prot grp */
2149                 while (!pgdone) {
2150                         /* Check to see if we ran out of space */
2151                         if (num_bde >= phba->cfg_total_seg_cnt)
2152                                 return num_bde + 1;
2153
2154                         if (!sgde) {
2155                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2156                                         "9065 BLKGRD:%s Invalid data segment\n",
2157                                                 __func__);
2158                                 return 0;
2159                         }
2160                         bpl++;
2161                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2162                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2163                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2164
2165                         remainder = sg_dma_len(sgde) - split_offset;
2166
2167                         if ((subtotal + remainder) <= protgrp_bytes) {
2168                                 /* we can use this whole buffer */
2169                                 bpl->tus.f.bdeSize = remainder;
2170                                 split_offset = 0;
2171
2172                                 if ((subtotal + remainder) == protgrp_bytes)
2173                                         pgdone = 1;
2174                         } else {
2175                                 /* must split this buffer with next prot grp */
2176                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2177                                 split_offset += bpl->tus.f.bdeSize;
2178                         }
2179
2180                         subtotal += bpl->tus.f.bdeSize;
2181
2182                         if (datadir == DMA_TO_DEVICE)
2183                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2184                         else
2185                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2186                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2187
2188                         num_bde++;
2189                         curr_data++;
2190
2191                         if (split_offset)
2192                                 break;
2193
2194                         /* Move to the next s/g segment if possible */
2195                         sgde = sg_next(sgde);
2196
2197                 }
2198
2199                 if (protgroup_offset) {
2200                         /* update the reference tag */
2201                         reftag += protgrp_blks;
2202                         bpl++;
2203                         continue;
2204                 }
2205
2206                 /* are we done ? */
2207                 if (curr_prot == protcnt) {
2208                         alldone = 1;
2209                 } else if (curr_prot < protcnt) {
2210                         /* advance to next prot buffer */
2211                         sgpe = sg_next(sgpe);
2212                         bpl++;
2213
2214                         /* update the reference tag */
2215                         reftag += protgrp_blks;
2216                 } else {
2217                         /* if we're here, we have a bug */
2218                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2219                                 "9054 BLKGRD: bug in %s\n", __func__);
2220                 }
2221
2222         } while (!alldone);
2223 out:
2224
2225         return num_bde;
2226 }
2227
2228 /**
2229  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2230  * @phba: The Hba for which this call is being executed.
2231  * @sc: pointer to scsi command we're working on
2232  * @sgl: pointer to buffer list for protection groups
2233  * @datacnt: number of segments of data that have been dma mapped
2234  *
2235  * This function sets up SGL buffer list for protection groups of
2236  * type LPFC_PG_TYPE_NO_DIF
2237  *
2238  * This is usually used when the HBA is instructed to generate
2239  * DIFs and insert them into data stream (or strip DIF from
2240  * incoming data stream)
2241  *
2242  * The buffer list consists of just one protection group described
2243  * below:
2244  *                                +-------------------------+
2245  *   start of prot group  -->     |         DI_SEED         |
2246  *                                +-------------------------+
2247  *                                |         Data SGE        |
2248  *                                +-------------------------+
2249  *                                |more Data SGE's ... (opt)|
2250  *                                +-------------------------+
2251  *
2252  *
2253  * Note: Data s/g buffers have been dma mapped
2254  *
2255  * Returns the number of SGEs added to the SGL.
2256  **/
2257 static int
2258 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2259                 struct sli4_sge *sgl, int datasegcnt)
2260 {
2261         struct scatterlist *sgde = NULL; /* s/g data entry */
2262         struct sli4_sge_diseed *diseed = NULL;
2263         dma_addr_t physaddr;
2264         int i = 0, num_sge = 0, status;
2265         uint32_t reftag;
2266         unsigned blksize;
2267         uint8_t txop, rxop;
2268 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2269         uint32_t rc;
2270 #endif
2271         uint32_t checking = 1;
2272         uint32_t dma_len;
2273         uint32_t dma_offset = 0;
2274
2275         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2276         if (status)
2277                 goto out;
2278
2279         /* extract some info from the scsi command for pde*/
2280         blksize = lpfc_cmd_blksize(sc);
2281         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2282
2283 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2284         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2285         if (rc) {
2286                 if (rc & BG_ERR_SWAP)
2287                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2288                 if (rc & BG_ERR_CHECK)
2289                         checking = 0;
2290         }
2291 #endif
2292
2293         /* setup DISEED with what we have */
2294         diseed = (struct sli4_sge_diseed *) sgl;
2295         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2296         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2297
2298         /* Endianness conversion if necessary */
2299         diseed->ref_tag = cpu_to_le32(reftag);
2300         diseed->ref_tag_tran = diseed->ref_tag;
2301
2302         /*
2303          * We only need to check the data on READs, for WRITEs
2304          * protection data is automatically generated, not checked.
2305          */
2306         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2307                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2308                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2309                 else
2310                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2311
2312                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2313                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2314                 else
2315                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2316         }
2317
2318         /* setup DISEED with the rest of the info */
2319         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2320         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2321
2322         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2323         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2324
2325         /* Endianness conversion if necessary for DISEED */
2326         diseed->word2 = cpu_to_le32(diseed->word2);
2327         diseed->word3 = cpu_to_le32(diseed->word3);
2328
2329         /* advance bpl and increment sge count */
2330         num_sge++;
2331         sgl++;
2332
2333         /* assumption: caller has already run dma_map_sg on command data */
2334         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2335                 physaddr = sg_dma_address(sgde);
2336                 dma_len = sg_dma_len(sgde);
2337                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2338                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2339                 if ((i + 1) == datasegcnt)
2340                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2341                 else
2342                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2343                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2344                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2345
2346                 sgl->sge_len = cpu_to_le32(dma_len);
2347                 dma_offset += dma_len;
2348
2349                 sgl++;
2350                 num_sge++;
2351         }
2352
2353 out:
2354         return num_sge;
2355 }
2356
2357 /**
2358  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2359  * @phba: The Hba for which this call is being executed.
2360  * @sc: pointer to scsi command we're working on
2361  * @sgl: pointer to buffer list for protection groups
2362  * @datacnt: number of segments of data that have been dma mapped
2363  * @protcnt: number of segment of protection data that have been dma mapped
2364  *
2365  * This function sets up SGL buffer list for protection groups of
2366  * type LPFC_PG_TYPE_DIF
2367  *
2368  * This is usually used when DIFs are in their own buffers,
2369  * separate from the data. The HBA can then by instructed
2370  * to place the DIFs in the outgoing stream.  For read operations,
2371  * The HBA could extract the DIFs and place it in DIF buffers.
2372  *
2373  * The buffer list for this type consists of one or more of the
2374  * protection groups described below:
2375  *                                    +-------------------------+
2376  *   start of first prot group  -->   |         DISEED          |
2377  *                                    +-------------------------+
2378  *                                    |      DIF (Prot SGE)     |
2379  *                                    +-------------------------+
2380  *                                    |        Data SGE         |
2381  *                                    +-------------------------+
2382  *                                    |more Data SGE's ... (opt)|
2383  *                                    +-------------------------+
2384  *   start of new  prot group  -->    |         DISEED          |
2385  *                                    +-------------------------+
2386  *                                    |          ...            |
2387  *                                    +-------------------------+
2388  *
2389  * Note: It is assumed that both data and protection s/g buffers have been
2390  *       mapped for DMA
2391  *
2392  * Returns the number of SGEs added to the SGL.
2393  **/
2394 static int
2395 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2396                 struct sli4_sge *sgl, int datacnt, int protcnt)
2397 {
2398         struct scatterlist *sgde = NULL; /* s/g data entry */
2399         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2400         struct sli4_sge_diseed *diseed = NULL;
2401         dma_addr_t dataphysaddr, protphysaddr;
2402         unsigned short curr_data = 0, curr_prot = 0;
2403         unsigned int split_offset;
2404         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2405         unsigned int protgrp_blks, protgrp_bytes;
2406         unsigned int remainder, subtotal;
2407         int status;
2408         unsigned char pgdone = 0, alldone = 0;
2409         unsigned blksize;
2410         uint32_t reftag;
2411         uint8_t txop, rxop;
2412         uint32_t dma_len;
2413 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2414         uint32_t rc;
2415 #endif
2416         uint32_t checking = 1;
2417         uint32_t dma_offset = 0;
2418         int num_sge = 0;
2419
2420         sgpe = scsi_prot_sglist(sc);
2421         sgde = scsi_sglist(sc);
2422
2423         if (!sgpe || !sgde) {
2424                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2425                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2426                                 sgpe, sgde);
2427                 return 0;
2428         }
2429
2430         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2431         if (status)
2432                 goto out;
2433
2434         /* extract some info from the scsi command */
2435         blksize = lpfc_cmd_blksize(sc);
2436         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2437
2438 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2439         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2440         if (rc) {
2441                 if (rc & BG_ERR_SWAP)
2442                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2443                 if (rc & BG_ERR_CHECK)
2444                         checking = 0;
2445         }
2446 #endif
2447
2448         split_offset = 0;
2449         do {
2450                 /* Check to see if we ran out of space */
2451                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2452                         return num_sge + 3;
2453
2454                 /* setup DISEED with what we have */
2455                 diseed = (struct sli4_sge_diseed *) sgl;
2456                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2457                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2458
2459                 /* Endianness conversion if necessary */
2460                 diseed->ref_tag = cpu_to_le32(reftag);
2461                 diseed->ref_tag_tran = diseed->ref_tag;
2462
2463                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2464                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2465
2466                 } else {
2467                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2468                         /*
2469                          * When in this mode, the hardware will replace
2470                          * the guard tag from the host with a
2471                          * newly generated good CRC for the wire.
2472                          * Switch to raw mode here to avoid this
2473                          * behavior. What the host sends gets put on the wire.
2474                          */
2475                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2476                                 txop = BG_OP_RAW_MODE;
2477                                 rxop = BG_OP_RAW_MODE;
2478                         }
2479                 }
2480
2481
2482                 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2483                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2484                 else
2485                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2486
2487                 /* setup DISEED with the rest of the info */
2488                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2489                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2490
2491                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2492                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2493
2494                 /* Endianness conversion if necessary for DISEED */
2495                 diseed->word2 = cpu_to_le32(diseed->word2);
2496                 diseed->word3 = cpu_to_le32(diseed->word3);
2497
2498                 /* advance sgl and increment bde count */
2499                 num_sge++;
2500                 sgl++;
2501
2502                 /* setup the first BDE that points to protection buffer */
2503                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2504                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2505
2506                 /* must be integer multiple of the DIF block length */
2507                 BUG_ON(protgroup_len % 8);
2508
2509                 /* Now setup DIF SGE */
2510                 sgl->word2 = 0;
2511                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2512                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2513                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2514                 sgl->word2 = cpu_to_le32(sgl->word2);
2515
2516                 protgrp_blks = protgroup_len / 8;
2517                 protgrp_bytes = protgrp_blks * blksize;
2518
2519                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2520                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2521                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2522                         protgroup_offset += protgroup_remainder;
2523                         protgrp_blks = protgroup_remainder / 8;
2524                         protgrp_bytes = protgrp_blks * blksize;
2525                 } else {
2526                         protgroup_offset = 0;
2527                         curr_prot++;
2528                 }
2529
2530                 num_sge++;
2531
2532                 /* setup SGE's for data blocks associated with DIF data */
2533                 pgdone = 0;
2534                 subtotal = 0; /* total bytes processed for current prot grp */
2535                 while (!pgdone) {
2536                         /* Check to see if we ran out of space */
2537                         if (num_sge >= phba->cfg_total_seg_cnt)
2538                                 return num_sge + 1;
2539
2540                         if (!sgde) {
2541                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2542                                         "9086 BLKGRD:%s Invalid data segment\n",
2543                                                 __func__);
2544                                 return 0;
2545                         }
2546                         sgl++;
2547                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2548
2549                         remainder = sg_dma_len(sgde) - split_offset;
2550
2551                         if ((subtotal + remainder) <= protgrp_bytes) {
2552                                 /* we can use this whole buffer */
2553                                 dma_len = remainder;
2554                                 split_offset = 0;
2555
2556                                 if ((subtotal + remainder) == protgrp_bytes)
2557                                         pgdone = 1;
2558                         } else {
2559                                 /* must split this buffer with next prot grp */
2560                                 dma_len = protgrp_bytes - subtotal;
2561                                 split_offset += dma_len;
2562                         }
2563
2564                         subtotal += dma_len;
2565
2566                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2567                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2568                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2569                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2570                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2571
2572                         sgl->sge_len = cpu_to_le32(dma_len);
2573                         dma_offset += dma_len;
2574
2575                         num_sge++;
2576                         curr_data++;
2577
2578                         if (split_offset)
2579                                 break;
2580
2581                         /* Move to the next s/g segment if possible */
2582                         sgde = sg_next(sgde);
2583                 }
2584
2585                 if (protgroup_offset) {
2586                         /* update the reference tag */
2587                         reftag += protgrp_blks;
2588                         sgl++;
2589                         continue;
2590                 }
2591
2592                 /* are we done ? */
2593                 if (curr_prot == protcnt) {
2594                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2595                         alldone = 1;
2596                 } else if (curr_prot < protcnt) {
2597                         /* advance to next prot buffer */
2598                         sgpe = sg_next(sgpe);
2599                         sgl++;
2600
2601                         /* update the reference tag */
2602                         reftag += protgrp_blks;
2603                 } else {
2604                         /* if we're here, we have a bug */
2605                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2606                                 "9085 BLKGRD: bug in %s\n", __func__);
2607                 }
2608
2609         } while (!alldone);
2610
2611 out:
2612
2613         return num_sge;
2614 }
2615
2616 /**
2617  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2618  * @phba: The Hba for which this call is being executed.
2619  * @sc: pointer to scsi command we're working on
2620  *
2621  * Given a SCSI command that supports DIF, determine composition of protection
2622  * groups involved in setting up buffer lists
2623  *
2624  * Returns: Protection group type (with or without DIF)
2625  *
2626  **/
2627 static int
2628 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2629 {
2630         int ret = LPFC_PG_TYPE_INVALID;
2631         unsigned char op = scsi_get_prot_op(sc);
2632
2633         switch (op) {
2634         case SCSI_PROT_READ_STRIP:
2635         case SCSI_PROT_WRITE_INSERT:
2636                 ret = LPFC_PG_TYPE_NO_DIF;
2637                 break;
2638         case SCSI_PROT_READ_INSERT:
2639         case SCSI_PROT_WRITE_STRIP:
2640         case SCSI_PROT_READ_PASS:
2641         case SCSI_PROT_WRITE_PASS:
2642                 ret = LPFC_PG_TYPE_DIF_BUF;
2643                 break;
2644         default:
2645                 if (phba)
2646                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2647                                         "9021 Unsupported protection op:%d\n",
2648                                         op);
2649                 break;
2650         }
2651         return ret;
2652 }
2653
2654 /**
2655  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2656  * @phba: The Hba for which this call is being executed.
2657  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2658  *
2659  * Adjust the data length to account for how much data
2660  * is actually on the wire.
2661  *
2662  * returns the adjusted data length
2663  **/
2664 static int
2665 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2666                        struct lpfc_scsi_buf *lpfc_cmd)
2667 {
2668         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2669         int fcpdl;
2670
2671         fcpdl = scsi_bufflen(sc);
2672
2673         /* Check if there is protection data on the wire */
2674         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2675                 /* Read check for protection data */
2676                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2677                         return fcpdl;
2678
2679         } else {
2680                 /* Write check for protection data */
2681                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2682                         return fcpdl;
2683         }
2684
2685         /*
2686          * If we are in DIF Type 1 mode every data block has a 8 byte
2687          * DIF (trailer) attached to it. Must ajust FCP data length
2688          * to account for the protection data.
2689          */
2690         fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2691
2692         return fcpdl;
2693 }
2694
2695 /**
2696  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2697  * @phba: The Hba for which this call is being executed.
2698  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2699  *
2700  * This is the protection/DIF aware version of
2701  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2702  * two functions eventually, but for now, it's here
2703  **/
2704 static int
2705 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2706                 struct lpfc_scsi_buf *lpfc_cmd)
2707 {
2708         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2709         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2710         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2711         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2712         uint32_t num_bde = 0;
2713         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2714         int prot_group_type = 0;
2715         int fcpdl;
2716
2717         /*
2718          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2719          *  fcp_rsp regions to the first data bde entry
2720          */
2721         bpl += 2;
2722         if (scsi_sg_count(scsi_cmnd)) {
2723                 /*
2724                  * The driver stores the segment count returned from pci_map_sg
2725                  * because this a count of dma-mappings used to map the use_sg
2726                  * pages.  They are not guaranteed to be the same for those
2727                  * architectures that implement an IOMMU.
2728                  */
2729                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2730                                         scsi_sglist(scsi_cmnd),
2731                                         scsi_sg_count(scsi_cmnd), datadir);
2732                 if (unlikely(!datasegcnt))
2733                         return 1;
2734
2735                 lpfc_cmd->seg_cnt = datasegcnt;
2736
2737                 /* First check if data segment count from SCSI Layer is good */
2738                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2739                         goto err;
2740
2741                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2742
2743                 switch (prot_group_type) {
2744                 case LPFC_PG_TYPE_NO_DIF:
2745
2746                         /* Here we need to add a PDE5 and PDE6 to the count */
2747                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2748                                 goto err;
2749
2750                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2751                                         datasegcnt);
2752                         /* we should have 2 or more entries in buffer list */
2753                         if (num_bde < 2)
2754                                 goto err;
2755                         break;
2756
2757                 case LPFC_PG_TYPE_DIF_BUF:
2758                         /*
2759                          * This type indicates that protection buffers are
2760                          * passed to the driver, so that needs to be prepared
2761                          * for DMA
2762                          */
2763                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2764                                         scsi_prot_sglist(scsi_cmnd),
2765                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2766                         if (unlikely(!protsegcnt)) {
2767                                 scsi_dma_unmap(scsi_cmnd);
2768                                 return 1;
2769                         }
2770
2771                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2772
2773                         /*
2774                          * There is a minimun of 4 BPLs used for every
2775                          * protection data segment.
2776                          */
2777                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2778                             (phba->cfg_total_seg_cnt - 2))
2779                                 goto err;
2780
2781                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2782                                         datasegcnt, protsegcnt);
2783                         /* we should have 3 or more entries in buffer list */
2784                         if ((num_bde < 3) ||
2785                             (num_bde > phba->cfg_total_seg_cnt))
2786                                 goto err;
2787                         break;
2788
2789                 case LPFC_PG_TYPE_INVALID:
2790                 default:
2791                         scsi_dma_unmap(scsi_cmnd);
2792                         lpfc_cmd->seg_cnt = 0;
2793
2794                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2795                                         "9022 Unexpected protection group %i\n",
2796                                         prot_group_type);
2797                         return 1;
2798                 }
2799         }
2800
2801         /*
2802          * Finish initializing those IOCB fields that are dependent on the
2803          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2804          * reinitialized since all iocb memory resources are used many times
2805          * for transmit, receive, and continuation bpl's.
2806          */
2807         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2808         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2809         iocb_cmd->ulpBdeCount = 1;
2810         iocb_cmd->ulpLe = 1;
2811
2812         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2813         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2814
2815         /*
2816          * Due to difference in data length between DIF/non-DIF paths,
2817          * we need to set word 4 of IOCB here
2818          */
2819         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2820
2821         return 0;
2822 err:
2823         if (lpfc_cmd->seg_cnt)
2824                 scsi_dma_unmap(scsi_cmnd);
2825         if (lpfc_cmd->prot_seg_cnt)
2826                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2827                              scsi_prot_sg_count(scsi_cmnd),
2828                              scsi_cmnd->sc_data_direction);
2829
2830         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2831                         "9023 Cannot setup S/G List for HBA"
2832                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2833                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2834                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2835                         prot_group_type, num_bde);
2836
2837         lpfc_cmd->seg_cnt = 0;
2838         lpfc_cmd->prot_seg_cnt = 0;
2839         return 1;
2840 }
2841
2842 /*
2843  * This function calcuates the T10 DIF guard tag
2844  * on the specified data using a CRC algorithmn
2845  * using crc_t10dif.
2846  */
2847 static uint16_t
2848 lpfc_bg_crc(uint8_t *data, int count)
2849 {
2850         uint16_t crc = 0;
2851         uint16_t x;
2852
2853         crc = crc_t10dif(data, count);
2854         x = cpu_to_be16(crc);
2855         return x;
2856 }
2857
2858 /*
2859  * This function calcuates the T10 DIF guard tag
2860  * on the specified data using a CSUM algorithmn
2861  * using ip_compute_csum.
2862  */
2863 static uint16_t
2864 lpfc_bg_csum(uint8_t *data, int count)
2865 {
2866         uint16_t ret;
2867
2868         ret = ip_compute_csum(data, count);
2869         return ret;
2870 }
2871
2872 /*
2873  * This function examines the protection data to try to determine
2874  * what type of T10-DIF error occurred.
2875  */
2876 static void
2877 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
2878 {
2879         struct scatterlist *sgpe; /* s/g prot entry */
2880         struct scatterlist *sgde; /* s/g data entry */
2881         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2882         struct scsi_dif_tuple *src = NULL;
2883         uint8_t *data_src = NULL;
2884         uint16_t guard_tag, guard_type;
2885         uint16_t start_app_tag, app_tag;
2886         uint32_t start_ref_tag, ref_tag;
2887         int prot, protsegcnt;
2888         int err_type, len, data_len;
2889         int chk_ref, chk_app, chk_guard;
2890         uint16_t sum;
2891         unsigned blksize;
2892
2893         err_type = BGS_GUARD_ERR_MASK;
2894         sum = 0;
2895         guard_tag = 0;
2896
2897         /* First check to see if there is protection data to examine */
2898         prot = scsi_get_prot_op(cmd);
2899         if ((prot == SCSI_PROT_READ_STRIP) ||
2900             (prot == SCSI_PROT_WRITE_INSERT) ||
2901             (prot == SCSI_PROT_NORMAL))
2902                 goto out;
2903
2904         /* Currently the driver just supports ref_tag and guard_tag checking */
2905         chk_ref = 1;
2906         chk_app = 0;
2907         chk_guard = 0;
2908
2909         /* Setup a ptr to the protection data provided by the SCSI host */
2910         sgpe = scsi_prot_sglist(cmd);
2911         protsegcnt = lpfc_cmd->prot_seg_cnt;
2912
2913         if (sgpe && protsegcnt) {
2914
2915                 /*
2916                  * We will only try to verify guard tag if the segment
2917                  * data length is a multiple of the blksize.
2918                  */
2919                 sgde = scsi_sglist(cmd);
2920                 blksize = lpfc_cmd_blksize(cmd);
2921                 data_src = (uint8_t *)sg_virt(sgde);
2922                 data_len = sgde->length;
2923                 if ((data_len & (blksize - 1)) == 0)
2924                         chk_guard = 1;
2925                 guard_type = scsi_host_get_guard(cmd->device->host);
2926
2927                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2928                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2929                 start_app_tag = src->app_tag;
2930                 len = sgpe->length;
2931                 while (src && protsegcnt) {
2932                         while (len) {
2933
2934                                 /*
2935                                  * First check to see if a protection data
2936                                  * check is valid
2937                                  */
2938                                 if ((src->ref_tag == 0xffffffff) ||
2939                                     (src->app_tag == 0xffff)) {
2940                                         start_ref_tag++;
2941                                         goto skipit;
2942                                 }
2943
2944                                 /* First Guard Tag checking */
2945                                 if (chk_guard) {
2946                                         guard_tag = src->guard_tag;
2947                                         if (lpfc_cmd_guard_csum(cmd))
2948                                                 sum = lpfc_bg_csum(data_src,
2949                                                                    blksize);
2950                                         else
2951                                                 sum = lpfc_bg_crc(data_src,
2952                                                                   blksize);
2953                                         if ((guard_tag != sum)) {
2954                                                 err_type = BGS_GUARD_ERR_MASK;
2955                                                 goto out;
2956                                         }
2957                                 }
2958
2959                                 /* Reference Tag checking */
2960                                 ref_tag = be32_to_cpu(src->ref_tag);
2961                                 if (chk_ref && (ref_tag != start_ref_tag)) {
2962                                         err_type = BGS_REFTAG_ERR_MASK;
2963                                         goto out;
2964                                 }
2965                                 start_ref_tag++;
2966
2967                                 /* App Tag checking */
2968                                 app_tag = src->app_tag;
2969                                 if (chk_app && (app_tag != start_app_tag)) {
2970                                         err_type = BGS_APPTAG_ERR_MASK;
2971                                         goto out;
2972                                 }
2973 skipit:
2974                                 len -= sizeof(struct scsi_dif_tuple);
2975                                 if (len < 0)
2976                                         len = 0;
2977                                 src++;
2978
2979                                 data_src += blksize;
2980                                 data_len -= blksize;
2981
2982                                 /*
2983                                  * Are we at the end of the Data segment?
2984                                  * The data segment is only used for Guard
2985                                  * tag checking.
2986                                  */
2987                                 if (chk_guard && (data_len == 0)) {
2988                                         chk_guard = 0;
2989                                         sgde = sg_next(sgde);
2990                                         if (!sgde)
2991                                                 goto out;
2992
2993                                         data_src = (uint8_t *)sg_virt(sgde);
2994                                         data_len = sgde->length;
2995                                         if ((data_len & (blksize - 1)) == 0)
2996                                                 chk_guard = 1;
2997                                 }
2998                         }
2999
3000                         /* Goto the next Protection data segment */
3001                         sgpe = sg_next(sgpe);
3002                         if (sgpe) {
3003                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3004                                 len = sgpe->length;
3005                         } else {
3006                                 src = NULL;
3007                         }
3008                         protsegcnt--;
3009                 }
3010         }
3011 out:
3012         if (err_type == BGS_GUARD_ERR_MASK) {
3013                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3014                                         0x10, 0x1);
3015                 cmd->result = DRIVER_SENSE << 24
3016                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3017                 phba->bg_guard_err_cnt++;
3018                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3019                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3020                                 (unsigned long)scsi_get_lba(cmd),
3021                                 sum, guard_tag);
3022
3023         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3024                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3025                                         0x10, 0x3);
3026                 cmd->result = DRIVER_SENSE << 24
3027                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3028
3029                 phba->bg_reftag_err_cnt++;
3030                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3031                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3032                                 (unsigned long)scsi_get_lba(cmd),
3033                                 ref_tag, start_ref_tag);
3034
3035         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3036                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3037                                         0x10, 0x2);
3038                 cmd->result = DRIVER_SENSE << 24
3039                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3040
3041                 phba->bg_apptag_err_cnt++;
3042                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3043                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3044                                 (unsigned long)scsi_get_lba(cmd),
3045                                 app_tag, start_app_tag);
3046         }
3047 }
3048
3049
3050 /*
3051  * This function checks for BlockGuard errors detected by
3052  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3053  * sense buffer will be set accordingly, paired with
3054  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3055  * detected corruption.
3056  *
3057  * Returns:
3058  *  0 - No error found
3059  *  1 - BlockGuard error found
3060  * -1 - Internal error (bad profile, ...etc)
3061  */
3062 static int
3063 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3064                         struct lpfc_iocbq *pIocbOut)
3065 {
3066         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3067         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3068         int ret = 0;
3069         uint32_t bghm = bgf->bghm;
3070         uint32_t bgstat = bgf->bgstat;
3071         uint64_t failing_sector = 0;
3072
3073         spin_lock(&_dump_buf_lock);
3074         if (!_dump_buf_done) {
3075                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3076                         " Data for %u blocks to debugfs\n",
3077                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3078                 lpfc_debug_save_data(phba, cmd);
3079
3080                 /* If we have a prot sgl, save the DIF buffer */
3081                 if (lpfc_prot_group_type(phba, cmd) ==
3082                                 LPFC_PG_TYPE_DIF_BUF) {
3083                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3084                                 "Saving DIF for %u blocks to debugfs\n",
3085                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3086                         lpfc_debug_save_dif(phba, cmd);
3087                 }
3088
3089                 _dump_buf_done = 1;
3090         }
3091         spin_unlock(&_dump_buf_lock);
3092
3093         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3094                 cmd->result = ScsiResult(DID_ERROR, 0);
3095                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3096                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3097                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3098                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3099                                 (unsigned long long)scsi_get_lba(cmd),
3100                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3101                 ret = (-1);
3102                 goto out;
3103         }
3104
3105         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3106                 cmd->result = ScsiResult(DID_ERROR, 0);
3107                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3108                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3109                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3110                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3111                                 (unsigned long long)scsi_get_lba(cmd),
3112                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3113                 ret = (-1);
3114                 goto out;
3115         }
3116
3117         if (lpfc_bgs_get_guard_err(bgstat)) {
3118                 ret = 1;
3119
3120                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3121                                 0x10, 0x1);
3122                 cmd->result = DRIVER_SENSE << 24
3123                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3124                 phba->bg_guard_err_cnt++;
3125                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3126                                 "9055 BLKGRD: Guard Tag error in cmd"
3127                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3128                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3129                                 (unsigned long long)scsi_get_lba(cmd),
3130                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3131         }
3132
3133         if (lpfc_bgs_get_reftag_err(bgstat)) {
3134                 ret = 1;
3135
3136                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3137                                 0x10, 0x3);
3138                 cmd->result = DRIVER_SENSE << 24
3139                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3140
3141                 phba->bg_reftag_err_cnt++;
3142                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3143                                 "9056 BLKGRD: Ref Tag error in cmd"
3144                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3145                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3146                                 (unsigned long long)scsi_get_lba(cmd),
3147                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3148         }
3149
3150         if (lpfc_bgs_get_apptag_err(bgstat)) {
3151                 ret = 1;
3152
3153                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3154                                 0x10, 0x2);
3155                 cmd->result = DRIVER_SENSE << 24
3156                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3157
3158                 phba->bg_apptag_err_cnt++;
3159                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3160                                 "9061 BLKGRD: App Tag error in cmd"
3161                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3162                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3163                                 (unsigned long long)scsi_get_lba(cmd),
3164                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3165         }
3166
3167         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3168                 /*
3169                  * setup sense data descriptor 0 per SPC-4 as an information
3170                  * field, and put the failing LBA in it.
3171                  * This code assumes there was also a guard/app/ref tag error
3172                  * indication.
3173                  */
3174                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3175                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3176                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3177                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3178
3179                 /* bghm is a "on the wire" FC frame based count */
3180                 switch (scsi_get_prot_op(cmd)) {
3181                 case SCSI_PROT_READ_INSERT:
3182                 case SCSI_PROT_WRITE_STRIP:
3183                         bghm /= cmd->device->sector_size;
3184                         break;
3185                 case SCSI_PROT_READ_STRIP:
3186                 case SCSI_PROT_WRITE_INSERT:
3187                 case SCSI_PROT_READ_PASS:
3188                 case SCSI_PROT_WRITE_PASS:
3189                         bghm /= (cmd->device->sector_size +
3190                                 sizeof(struct scsi_dif_tuple));
3191                         break;
3192                 }
3193
3194                 failing_sector = scsi_get_lba(cmd);
3195                 failing_sector += bghm;
3196
3197                 /* Descriptor Information */
3198                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3199         }
3200
3201         if (!ret) {
3202                 /* No error was reported - problem in FW? */
3203                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3204                                 "9057 BLKGRD: Unknown error in cmd"
3205                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3206                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3207                                 (unsigned long long)scsi_get_lba(cmd),
3208                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3209
3210                 /* Calcuate what type of error it was */
3211                 lpfc_calc_bg_err(phba, lpfc_cmd);
3212         }
3213 out:
3214         return ret;
3215 }
3216
3217 /**
3218  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3219  * @phba: The Hba for which this call is being executed.
3220  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3221  *
3222  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3223  * field of @lpfc_cmd for device with SLI-4 interface spec.
3224  *
3225  * Return codes:
3226  *      1 - Error
3227  *      0 - Success
3228  **/
3229 static int
3230 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3231 {
3232         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3233         struct scatterlist *sgel = NULL;
3234         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3235         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3236         struct sli4_sge *first_data_sgl;
3237         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3238         dma_addr_t physaddr;
3239         uint32_t num_bde = 0;
3240         uint32_t dma_len;
3241         uint32_t dma_offset = 0;
3242         int nseg;
3243         struct ulp_bde64 *bde;
3244
3245         /*
3246          * There are three possibilities here - use scatter-gather segment, use
3247          * the single mapping, or neither.  Start the lpfc command prep by
3248          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3249          * data bde entry.
3250          */
3251         if (scsi_sg_count(scsi_cmnd)) {
3252                 /*
3253                  * The driver stores the segment count returned from pci_map_sg
3254                  * because this a count of dma-mappings used to map the use_sg
3255                  * pages.  They are not guaranteed to be the same for those
3256                  * architectures that implement an IOMMU.
3257                  */
3258
3259                 nseg = scsi_dma_map(scsi_cmnd);
3260                 if (unlikely(!nseg))
3261                         return 1;
3262                 sgl += 1;
3263                 /* clear the last flag in the fcp_rsp map entry */
3264                 sgl->word2 = le32_to_cpu(sgl->word2);
3265                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3266                 sgl->word2 = cpu_to_le32(sgl->word2);
3267                 sgl += 1;
3268                 first_data_sgl = sgl;
3269                 lpfc_cmd->seg_cnt = nseg;
3270                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3271                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3272                                 " %s: Too many sg segments from "
3273                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3274                                 __func__, phba->cfg_sg_seg_cnt,
3275                                lpfc_cmd->seg_cnt);
3276                         lpfc_cmd->seg_cnt = 0;
3277                         scsi_dma_unmap(scsi_cmnd);
3278                         return 1;
3279                 }
3280
3281                 /*
3282                  * The driver established a maximum scatter-gather segment count
3283                  * during probe that limits the number of sg elements in any
3284                  * single scsi command.  Just run through the seg_cnt and format
3285                  * the sge's.
3286                  * When using SLI-3 the driver will try to fit all the BDEs into
3287                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3288                  * does for SLI-2 mode.
3289                  */
3290                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3291                         physaddr = sg_dma_address(sgel);
3292                         dma_len = sg_dma_len(sgel);
3293                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3294                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3295                         sgl->word2 = le32_to_cpu(sgl->word2);
3296                         if ((num_bde + 1) == nseg)
3297                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3298                         else
3299                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3300                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3301                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3302                         sgl->word2 = cpu_to_le32(sgl->word2);
3303                         sgl->sge_len = cpu_to_le32(dma_len);
3304                         dma_offset += dma_len;
3305                         sgl++;
3306                 }
3307                 /* setup the performance hint (first data BDE) if enabled */
3308                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3309                         bde = (struct ulp_bde64 *)
3310                                         &(iocb_cmd->unsli3.sli3Words[5]);
3311                         bde->addrLow = first_data_sgl->addr_lo;
3312                         bde->addrHigh = first_data_sgl->addr_hi;
3313                         bde->tus.f.bdeSize =
3314                                         le32_to_cpu(first_data_sgl->sge_len);
3315                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3316                         bde->tus.w = cpu_to_le32(bde->tus.w);
3317                 }
3318         } else {
3319                 sgl += 1;
3320                 /* clear the last flag in the fcp_rsp map entry */
3321                 sgl->word2 = le32_to_cpu(sgl->word2);
3322                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3323                 sgl->word2 = cpu_to_le32(sgl->word2);
3324         }
3325
3326         /*
3327          * Finish initializing those IOCB fields that are dependent on the
3328          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3329          * explicitly reinitialized.
3330          * all iocb memory resources are reused.
3331          */
3332         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3333
3334         /*
3335          * Due to difference in data length between DIF/non-DIF paths,
3336          * we need to set word 4 of IOCB here
3337          */
3338         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3339
3340         /*
3341          * If the OAS driver feature is enabled and the lun is enabled for
3342          * OAS, set the oas iocb related flags.
3343          */
3344         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3345                 scsi_cmnd->device->hostdata)->oas_enabled)
3346                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3347         return 0;
3348 }
3349
3350 /**
3351  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3352  * @phba: The Hba for which this call is being executed.
3353  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3354  *
3355  * This is the protection/DIF aware version of
3356  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3357  * two functions eventually, but for now, it's here
3358  **/
3359 static int
3360 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3361                 struct lpfc_scsi_buf *lpfc_cmd)
3362 {
3363         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3364         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3365         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3366         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3367         uint32_t num_sge = 0;
3368         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3369         int prot_group_type = 0;
3370         int fcpdl;
3371
3372         /*
3373          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3374          *  fcp_rsp regions to the first data sge entry
3375          */
3376         if (scsi_sg_count(scsi_cmnd)) {
3377                 /*
3378                  * The driver stores the segment count returned from pci_map_sg
3379                  * because this a count of dma-mappings used to map the use_sg
3380                  * pages.  They are not guaranteed to be the same for those
3381                  * architectures that implement an IOMMU.
3382                  */
3383                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3384                                         scsi_sglist(scsi_cmnd),
3385                                         scsi_sg_count(scsi_cmnd), datadir);
3386                 if (unlikely(!datasegcnt))
3387                         return 1;
3388
3389                 sgl += 1;
3390                 /* clear the last flag in the fcp_rsp map entry */
3391                 sgl->word2 = le32_to_cpu(sgl->word2);
3392                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3393                 sgl->word2 = cpu_to_le32(sgl->word2);
3394
3395                 sgl += 1;
3396                 lpfc_cmd->seg_cnt = datasegcnt;
3397
3398                 /* First check if data segment count from SCSI Layer is good */
3399                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3400                         goto err;
3401
3402                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3403
3404                 switch (prot_group_type) {
3405                 case LPFC_PG_TYPE_NO_DIF:
3406                         /* Here we need to add a DISEED to the count */
3407                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3408                                 goto err;
3409
3410                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3411                                         datasegcnt);
3412
3413                         /* we should have 2 or more entries in buffer list */
3414                         if (num_sge < 2)
3415                                 goto err;
3416                         break;
3417
3418                 case LPFC_PG_TYPE_DIF_BUF:
3419                         /*
3420                          * This type indicates that protection buffers are
3421                          * passed to the driver, so that needs to be prepared
3422                          * for DMA
3423                          */
3424                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3425                                         scsi_prot_sglist(scsi_cmnd),
3426                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3427                         if (unlikely(!protsegcnt)) {
3428                                 scsi_dma_unmap(scsi_cmnd);
3429                                 return 1;
3430                         }
3431
3432                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3433                         /*
3434                          * There is a minimun of 3 SGEs used for every
3435                          * protection data segment.
3436                          */
3437                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3438                             (phba->cfg_total_seg_cnt - 2))
3439                                 goto err;
3440
3441                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3442                                         datasegcnt, protsegcnt);
3443
3444                         /* we should have 3 or more entries in buffer list */
3445                         if ((num_sge < 3) ||
3446                             (num_sge > phba->cfg_total_seg_cnt))
3447                                 goto err;
3448                         break;
3449
3450                 case LPFC_PG_TYPE_INVALID:
3451                 default:
3452                         scsi_dma_unmap(scsi_cmnd);
3453                         lpfc_cmd->seg_cnt = 0;
3454
3455                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3456                                         "9083 Unexpected protection group %i\n",
3457                                         prot_group_type);
3458                         return 1;
3459                 }
3460         }
3461
3462         switch (scsi_get_prot_op(scsi_cmnd)) {
3463         case SCSI_PROT_WRITE_STRIP:
3464         case SCSI_PROT_READ_STRIP:
3465                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3466                 break;
3467         case SCSI_PROT_WRITE_INSERT:
3468         case SCSI_PROT_READ_INSERT:
3469                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3470                 break;
3471         case SCSI_PROT_WRITE_PASS:
3472         case SCSI_PROT_READ_PASS:
3473                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3474                 break;
3475         }
3476
3477         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3478         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3479
3480         /*
3481          * Due to difference in data length between DIF/non-DIF paths,
3482          * we need to set word 4 of IOCB here
3483          */
3484         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3485
3486         /*
3487          * If the OAS driver feature is enabled and the lun is enabled for
3488          * OAS, set the oas iocb related flags.
3489          */
3490         if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3491                 scsi_cmnd->device->hostdata)->oas_enabled)
3492                 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3493
3494         return 0;
3495 err:
3496         if (lpfc_cmd->seg_cnt)
3497                 scsi_dma_unmap(scsi_cmnd);
3498         if (lpfc_cmd->prot_seg_cnt)
3499                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3500                              scsi_prot_sg_count(scsi_cmnd),
3501                              scsi_cmnd->sc_data_direction);
3502
3503         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3504                         "9084 Cannot setup S/G List for HBA"
3505                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3506                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3507                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3508                         prot_group_type, num_sge);
3509
3510         lpfc_cmd->seg_cnt = 0;
3511         lpfc_cmd->prot_seg_cnt = 0;
3512         return 1;
3513 }
3514
3515 /**
3516  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3517  * @phba: The Hba for which this call is being executed.
3518  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3519  *
3520  * This routine wraps the actual DMA mapping function pointer from the
3521  * lpfc_hba struct.
3522  *
3523  * Return codes:
3524  *      1 - Error
3525  *      0 - Success
3526  **/
3527 static inline int
3528 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3529 {
3530         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3531 }
3532
3533 /**
3534  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3535  * using BlockGuard.
3536  * @phba: The Hba for which this call is being executed.
3537  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3538  *
3539  * This routine wraps the actual DMA mapping function pointer from the
3540  * lpfc_hba struct.
3541  *
3542  * Return codes:
3543  *      1 - Error
3544  *      0 - Success
3545  **/
3546 static inline int
3547 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3548 {
3549         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3550 }
3551
3552 /**
3553  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3554  * @phba: Pointer to hba context object.
3555  * @vport: Pointer to vport object.
3556  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3557  * @rsp_iocb: Pointer to response iocb object which reported error.
3558  *
3559  * This function posts an event when there is a SCSI command reporting
3560  * error from the scsi device.
3561  **/
3562 static void
3563 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3564                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3565         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3566         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3567         uint32_t resp_info = fcprsp->rspStatus2;
3568         uint32_t scsi_status = fcprsp->rspStatus3;
3569         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3570         struct lpfc_fast_path_event *fast_path_evt = NULL;
3571         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3572         unsigned long flags;
3573
3574         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3575                 return;
3576
3577         /* If there is queuefull or busy condition send a scsi event */
3578         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3579                 (cmnd->result == SAM_STAT_BUSY)) {
3580                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3581                 if (!fast_path_evt)
3582                         return;
3583                 fast_path_evt->un.scsi_evt.event_type =
3584                         FC_REG_SCSI_EVENT;
3585                 fast_path_evt->un.scsi_evt.subcategory =
3586                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3587                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3588                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3589                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3590                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3591                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3592                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3593         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3594                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3595                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3596                 if (!fast_path_evt)
3597                         return;
3598                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3599                         FC_REG_SCSI_EVENT;
3600                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3601                         LPFC_EVENT_CHECK_COND;
3602                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3603                         cmnd->device->lun;
3604                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3605                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3606                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3607                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3608                 fast_path_evt->un.check_cond_evt.sense_key =
3609                         cmnd->sense_buffer[2] & 0xf;
3610                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3611                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3612         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3613                      fcpi_parm &&
3614                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3615                         ((scsi_status == SAM_STAT_GOOD) &&
3616                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3617                 /*
3618                  * If status is good or resid does not match with fcp_param and
3619                  * there is valid fcpi_parm, then there is a read_check error
3620                  */
3621                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3622                 if (!fast_path_evt)
3623                         return;
3624                 fast_path_evt->un.read_check_error.header.event_type =
3625                         FC_REG_FABRIC_EVENT;
3626                 fast_path_evt->un.read_check_error.header.subcategory =
3627                         LPFC_EVENT_FCPRDCHKERR;
3628                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3629                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3630                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3631                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3632                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3633                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3634                 fast_path_evt->un.read_check_error.fcpiparam =
3635                         fcpi_parm;
3636         } else
3637                 return;
3638
3639         fast_path_evt->vport = vport;
3640         spin_lock_irqsave(&phba->hbalock, flags);
3641         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3642         spin_unlock_irqrestore(&phba->hbalock, flags);
3643         lpfc_worker_wake_up(phba);
3644         return;
3645 }
3646
3647 /**
3648  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3649  * @phba: The HBA for which this call is being executed.
3650  * @psb: The scsi buffer which is going to be un-mapped.
3651  *
3652  * This routine does DMA un-mapping of scatter gather list of scsi command
3653  * field of @lpfc_cmd for device with SLI-3 interface spec.
3654  **/
3655 static void
3656 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3657 {
3658         /*
3659          * There are only two special cases to consider.  (1) the scsi command
3660          * requested scatter-gather usage or (2) the scsi command allocated
3661          * a request buffer, but did not request use_sg.  There is a third
3662          * case, but it does not require resource deallocation.
3663          */
3664         if (psb->seg_cnt > 0)
3665                 scsi_dma_unmap(psb->pCmd);
3666         if (psb->prot_seg_cnt > 0)
3667                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3668                                 scsi_prot_sg_count(psb->pCmd),
3669                                 psb->pCmd->sc_data_direction);
3670 }
3671
3672 /**
3673  * lpfc_handler_fcp_err - FCP response handler
3674  * @vport: The virtual port for which this call is being executed.
3675  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3676  * @rsp_iocb: The response IOCB which contains FCP error.
3677  *
3678  * This routine is called to process response IOCB with status field
3679  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3680  * based upon SCSI and FCP error.
3681  **/
3682 static void
3683 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3684                     struct lpfc_iocbq *rsp_iocb)
3685 {
3686         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3687         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3688         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3689         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3690         uint32_t resp_info = fcprsp->rspStatus2;
3691         uint32_t scsi_status = fcprsp->rspStatus3;
3692         uint32_t *lp;
3693         uint32_t host_status = DID_OK;
3694         uint32_t rsplen = 0;
3695         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3696
3697
3698         /*
3699          *  If this is a task management command, there is no
3700          *  scsi packet associated with this lpfc_cmd.  The driver
3701          *  consumes it.
3702          */
3703         if (fcpcmd->fcpCntl2) {
3704                 scsi_status = 0;
3705                 goto out;
3706         }
3707
3708         if (resp_info & RSP_LEN_VALID) {
3709                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3710                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3711                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3712                                  "2719 Invalid response length: "
3713                                  "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3714                                  cmnd->device->id,
3715                                  cmnd->device->lun, cmnd->cmnd[0],
3716                                  rsplen);
3717                         host_status = DID_ERROR;
3718                         goto out;
3719                 }
3720                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3721                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3722                                  "2757 Protocol failure detected during "
3723                                  "processing of FCP I/O op: "
3724                                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3725                                  cmnd->device->id,
3726                                  cmnd->device->lun, cmnd->cmnd[0],
3727                                  fcprsp->rspInfo3);
3728                         host_status = DID_ERROR;
3729                         goto out;
3730                 }
3731         }
3732
3733         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3734                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3735                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3736                         snslen = SCSI_SENSE_BUFFERSIZE;
3737
3738                 if (resp_info & RSP_LEN_VALID)
3739                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3740                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3741         }
3742         lp = (uint32_t *)cmnd->sense_buffer;
3743
3744         /* special handling for under run conditions */
3745         if (!scsi_status && (resp_info & RESID_UNDER)) {
3746                 /* don't log under runs if fcp set... */
3747                 if (vport->cfg_log_verbose & LOG_FCP)
3748                         logit = LOG_FCP_ERROR;
3749                 /* unless operator says so */
3750                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3751                         logit = LOG_FCP_UNDER;
3752         }
3753
3754         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3755                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3756                          "Data: x%x x%x x%x x%x x%x\n",
3757                          cmnd->cmnd[0], scsi_status,
3758                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3759                          be32_to_cpu(fcprsp->rspResId),
3760                          be32_to_cpu(fcprsp->rspSnsLen),
3761                          be32_to_cpu(fcprsp->rspRspLen),
3762                          fcprsp->rspInfo3);
3763
3764         scsi_set_resid(cmnd, 0);
3765         if (resp_info & RESID_UNDER) {
3766                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3767
3768                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3769                                  "9025 FCP Read Underrun, expected %d, "
3770                                  "residual %d Data: x%x x%x x%x\n",
3771                                  be32_to_cpu(fcpcmd->fcpDl),
3772                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3773                                  cmnd->underflow);
3774
3775                 /*
3776                  * If there is an under run check if under run reported by
3777                  * storage array is same as the under run reported by HBA.
3778                  * If this is not same, there is a dropped frame.
3779                  */
3780                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3781                         fcpi_parm &&
3782                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3783                         lpfc_printf_vlog(vport, KERN_WARNING,
3784                                          LOG_FCP | LOG_FCP_ERROR,
3785                                          "9026 FCP Read Check Error "
3786                                          "and Underrun Data: x%x x%x x%x x%x\n",
3787                                          be32_to_cpu(fcpcmd->fcpDl),
3788                                          scsi_get_resid(cmnd), fcpi_parm,
3789                                          cmnd->cmnd[0]);
3790                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3791                         host_status = DID_ERROR;
3792                 }
3793                 /*
3794                  * The cmnd->underflow is the minimum number of bytes that must
3795                  * be transferred for this command.  Provided a sense condition
3796                  * is not present, make sure the actual amount transferred is at
3797                  * least the underflow value or fail.
3798                  */
3799                 if (!(resp_info & SNS_LEN_VALID) &&
3800                     (scsi_status == SAM_STAT_GOOD) &&
3801                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3802                      < cmnd->underflow)) {
3803                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3804                                          "9027 FCP command x%x residual "
3805                                          "underrun converted to error "
3806                                          "Data: x%x x%x x%x\n",
3807                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3808                                          scsi_get_resid(cmnd), cmnd->underflow);
3809                         host_status = DID_ERROR;
3810                 }
3811         } else if (resp_info & RESID_OVER) {
3812                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3813                                  "9028 FCP command x%x residual overrun error. "
3814                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3815                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3816                 host_status = DID_ERROR;
3817
3818         /*
3819          * Check SLI validation that all the transfer was actually done
3820          * (fcpi_parm should be zero). Apply check only to reads.
3821          */
3822         } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
3823                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3824                                  "9029 FCP Read Check Error Data: "
3825                                  "x%x x%x x%x x%x x%x\n",
3826                                  be32_to_cpu(fcpcmd->fcpDl),
3827                                  be32_to_cpu(fcprsp->rspResId),
3828                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3829                 switch (scsi_status) {
3830                 case SAM_STAT_GOOD:
3831                 case SAM_STAT_CHECK_CONDITION:
3832                         /* Fabric dropped a data frame. Fail any successful
3833                          * command in which we detected dropped frames.
3834                          * A status of good or some check conditions could
3835                          * be considered a successful command.
3836                          */
3837                         host_status = DID_ERROR;
3838                         break;
3839                 }
3840                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3841         }
3842
3843  out:
3844         cmnd->result = ScsiResult(host_status, scsi_status);
3845         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3846 }
3847
3848 /**
3849  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3850  * @phba: The Hba for which this call is being executed.
3851  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3852  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3853  *
3854  * This routine assigns scsi command result by looking into response IOCB
3855  * status field appropriately. This routine handles QUEUE FULL condition as
3856  * well by ramping down device queue depth.
3857  **/
3858 static void
3859 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3860                         struct lpfc_iocbq *pIocbOut)
3861 {
3862         struct lpfc_scsi_buf *lpfc_cmd =
3863                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3864         struct lpfc_vport      *vport = pIocbIn->vport;
3865         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3866         struct lpfc_nodelist *pnode = rdata->pnode;
3867         struct scsi_cmnd *cmd;
3868         int result;
3869         int depth;
3870         unsigned long flags;
3871         struct lpfc_fast_path_event *fast_path_evt;
3872         struct Scsi_Host *shost;
3873         uint32_t queue_depth, scsi_id;
3874         uint32_t logit = LOG_FCP;
3875
3876         /* Sanity check on return of outstanding command */
3877         if (!(lpfc_cmd->pCmd))
3878                 return;
3879         cmd = lpfc_cmd->pCmd;
3880         shost = cmd->device->host;
3881
3882         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
3883         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3884         /* pick up SLI4 exhange busy status from HBA */
3885         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
3886
3887 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
3888         if (lpfc_cmd->prot_data_type) {
3889                 struct scsi_dif_tuple *src = NULL;
3890
3891                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
3892                 /*
3893                  * Used to restore any changes to protection
3894                  * data for error injection.
3895                  */
3896                 switch (lpfc_cmd->prot_data_type) {
3897                 case LPFC_INJERR_REFTAG:
3898                         src->ref_tag =
3899                                 lpfc_cmd->prot_data;
3900                         break;
3901                 case LPFC_INJERR_APPTAG:
3902                         src->app_tag =
3903                                 (uint16_t)lpfc_cmd->prot_data;
3904                         break;
3905                 case LPFC_INJERR_GUARD:
3906                         src->guard_tag =
3907                                 (uint16_t)lpfc_cmd->prot_data;
3908                         break;
3909                 default:
3910                         break;
3911                 }
3912
3913                 lpfc_cmd->prot_data = 0;
3914                 lpfc_cmd->prot_data_type = 0;
3915                 lpfc_cmd->prot_data_segment = NULL;
3916         }
3917 #endif
3918         if (pnode && NLP_CHK_NODE_ACT(pnode))
3919                 atomic_dec(&pnode->cmd_pending);
3920
3921         if (lpfc_cmd->status) {
3922                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
3923                     (lpfc_cmd->result & IOERR_DRVR_MASK))
3924                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
3925                 else if (lpfc_cmd->status >= IOSTAT_CNT)
3926                         lpfc_cmd->status = IOSTAT_DEFAULT;
3927                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
3928                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
3929                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
3930                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3931                         logit = 0;
3932                 else
3933                         logit = LOG_FCP | LOG_FCP_UNDER;
3934                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
3935                          "9030 FCP cmd x%x failed <%d/%lld> "
3936                          "status: x%x result: x%x "
3937                          "sid: x%x did: x%x oxid: x%x "
3938                          "Data: x%x x%x\n",
3939                          cmd->cmnd[0],
3940                          cmd->device ? cmd->device->id : 0xffff,
3941                          cmd->device ? cmd->device->lun : 0xffff,
3942                          lpfc_cmd->status, lpfc_cmd->result,
3943                          vport->fc_myDID,
3944                          (pnode) ? pnode->nlp_DID : 0,
3945                          phba->sli_rev == LPFC_SLI_REV4 ?
3946                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
3947                          pIocbOut->iocb.ulpContext,
3948                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
3949
3950                 switch (lpfc_cmd->status) {
3951                 case IOSTAT_FCP_RSP_ERROR:
3952                         /* Call FCP RSP handler to determine result */
3953                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
3954                         break;
3955                 case IOSTAT_NPORT_BSY:
3956                 case IOSTAT_FABRIC_BSY:
3957                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
3958                         fast_path_evt = lpfc_alloc_fast_evt(phba);
3959                         if (!fast_path_evt)
3960                                 break;
3961                         fast_path_evt->un.fabric_evt.event_type =
3962                                 FC_REG_FABRIC_EVENT;
3963                         fast_path_evt->un.fabric_evt.subcategory =
3964                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
3965                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
3966                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
3967                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
3968                                         &pnode->nlp_portname,
3969                                         sizeof(struct lpfc_name));
3970                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
3971                                         &pnode->nlp_nodename,
3972                                         sizeof(struct lpfc_name));
3973                         }
3974                         fast_path_evt->vport = vport;
3975                         fast_path_evt->work_evt.evt =
3976                                 LPFC_EVT_FASTPATH_MGMT_EVT;
3977                         spin_lock_irqsave(&phba->hbalock, flags);
3978                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
3979                                 &phba->work_list);
3980                         spin_unlock_irqrestore(&phba->hbalock, flags);
3981                         lpfc_worker_wake_up(phba);
3982                         break;
3983                 case IOSTAT_LOCAL_REJECT:
3984                 case IOSTAT_REMOTE_STOP:
3985                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
3986                             lpfc_cmd->result ==
3987                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
3988                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
3989                             lpfc_cmd->result ==
3990                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
3991                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
3992                                 break;
3993                         }
3994                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
3995                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
3996                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
3997                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
3998                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
3999                                 break;
4000                         }
4001                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4002                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4003                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4004                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4005                                         /*
4006                                          * This is a response for a BG enabled
4007                                          * cmd. Parse BG error
4008                                          */
4009                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4010                                                         pIocbOut);
4011                                         break;
4012                                 } else {
4013                                         lpfc_printf_vlog(vport, KERN_WARNING,
4014                                                         LOG_BG,
4015                                                         "9031 non-zero BGSTAT "
4016                                                         "on unprotected cmd\n");
4017                                 }
4018                         }
4019                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4020                                 && (phba->sli_rev == LPFC_SLI_REV4)
4021                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4022                                 /* This IO was aborted by the target, we don't
4023                                  * know the rxid and because we did not send the
4024                                  * ABTS we cannot generate and RRQ.
4025                                  */
4026                                 lpfc_set_rrq_active(phba, pnode,
4027                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4028                                         0, 0);
4029                         }
4030                 /* else: fall through */
4031                 default:
4032                         cmd->result = ScsiResult(DID_ERROR, 0);
4033                         break;
4034                 }
4035
4036                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4037                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4038                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4039                                                  SAM_STAT_BUSY);
4040         } else
4041                 cmd->result = ScsiResult(DID_OK, 0);
4042
4043         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4044                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4045
4046                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4047                                  "0710 Iodone <%d/%llu> cmd %p, error "
4048                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4049                                  cmd->device->id, cmd->device->lun, cmd,
4050                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4051                                  scsi_get_resid(cmd));
4052         }
4053
4054         lpfc_update_stats(phba, lpfc_cmd);
4055         result = cmd->result;
4056         if (vport->cfg_max_scsicmpl_time &&
4057            time_after(jiffies, lpfc_cmd->start_time +
4058                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4059                 spin_lock_irqsave(shost->host_lock, flags);
4060                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4061                         if (pnode->cmd_qdepth >
4062                                 atomic_read(&pnode->cmd_pending) &&
4063                                 (atomic_read(&pnode->cmd_pending) >
4064                                 LPFC_MIN_TGT_QDEPTH) &&
4065                                 ((cmd->cmnd[0] == READ_10) ||
4066                                 (cmd->cmnd[0] == WRITE_10)))
4067                                 pnode->cmd_qdepth =
4068                                         atomic_read(&pnode->cmd_pending);
4069
4070                         pnode->last_change_time = jiffies;
4071                 }
4072                 spin_unlock_irqrestore(shost->host_lock, flags);
4073         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4074                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4075                    time_after(jiffies, pnode->last_change_time +
4076                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4077                         spin_lock_irqsave(shost->host_lock, flags);
4078                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4079                                 / 100;
4080                         depth = depth ? depth : 1;
4081                         pnode->cmd_qdepth += depth;
4082                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4083                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4084                         pnode->last_change_time = jiffies;
4085                         spin_unlock_irqrestore(shost->host_lock, flags);
4086                 }
4087         }
4088
4089         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4090
4091         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4092         queue_depth = cmd->device->queue_depth;
4093         scsi_id = cmd->device->id;
4094         cmd->scsi_done(cmd);
4095
4096         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4097                 spin_lock_irqsave(&phba->hbalock, flags);
4098                 lpfc_cmd->pCmd = NULL;
4099                 spin_unlock_irqrestore(&phba->hbalock, flags);
4100
4101                 /*
4102                  * If there is a thread waiting for command completion
4103                  * wake up the thread.
4104                  */
4105                 spin_lock_irqsave(shost->host_lock, flags);
4106                 if (lpfc_cmd->waitq)
4107                         wake_up(lpfc_cmd->waitq);
4108                 spin_unlock_irqrestore(shost->host_lock, flags);
4109                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4110                 return;
4111         }
4112
4113         spin_lock_irqsave(&phba->hbalock, flags);
4114         lpfc_cmd->pCmd = NULL;
4115         spin_unlock_irqrestore(&phba->hbalock, flags);
4116
4117         /*
4118          * If there is a thread waiting for command completion
4119          * wake up the thread.
4120          */
4121         spin_lock_irqsave(shost->host_lock, flags);
4122         if (lpfc_cmd->waitq)
4123                 wake_up(lpfc_cmd->waitq);
4124         spin_unlock_irqrestore(shost->host_lock, flags);
4125
4126         lpfc_release_scsi_buf(phba, lpfc_cmd);
4127 }
4128
4129 /**
4130  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4131  * @data: A pointer to the immediate command data portion of the IOCB.
4132  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4133  *
4134  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4135  * byte swapping the data to big endian format for transmission on the wire.
4136  **/
4137 static void
4138 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4139 {
4140         int i, j;
4141         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4142              i += sizeof(uint32_t), j++) {
4143                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4144         }
4145 }
4146
4147 /**
4148  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4149  * @vport: The virtual port for which this call is being executed.
4150  * @lpfc_cmd: The scsi command which needs to send.
4151  * @pnode: Pointer to lpfc_nodelist.
4152  *
4153  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4154  * to transfer for device with SLI3 interface spec.
4155  **/
4156 static void
4157 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4158                     struct lpfc_nodelist *pnode)
4159 {
4160         struct lpfc_hba *phba = vport->phba;
4161         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4162         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4163         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4164         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4165         int datadir = scsi_cmnd->sc_data_direction;
4166         uint8_t *ptr;
4167         bool sli4;
4168         uint32_t fcpdl;
4169
4170         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4171                 return;
4172
4173         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4174         /* clear task management bits */
4175         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4176
4177         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4178                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4179
4180         ptr = &fcp_cmnd->fcpCdb[0];
4181         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4182         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4183                 ptr += scsi_cmnd->cmd_len;
4184                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4185         }
4186
4187         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4188
4189         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4190         piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4191
4192         /*
4193          * There are three possibilities here - use scatter-gather segment, use
4194          * the single mapping, or neither.  Start the lpfc command prep by
4195          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4196          * data bde entry.
4197          */
4198         if (scsi_sg_count(scsi_cmnd)) {
4199                 if (datadir == DMA_TO_DEVICE) {
4200                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4201                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4202                         if (vport->cfg_first_burst_size &&
4203                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
4204                                 fcpdl = scsi_bufflen(scsi_cmnd);
4205                                 if (fcpdl < vport->cfg_first_burst_size)
4206                                         piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
4207                                 else
4208                                         piocbq->iocb.un.fcpi.fcpi_XRdy =
4209                                                 vport->cfg_first_burst_size;
4210                         }
4211                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4212                         phba->fc4OutputRequests++;
4213                 } else {
4214                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4215                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4216                         fcp_cmnd->fcpCntl3 = READ_DATA;
4217                         phba->fc4InputRequests++;
4218                 }
4219         } else {
4220                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4221                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4222                 iocb_cmd->ulpPU = 0;
4223                 fcp_cmnd->fcpCntl3 = 0;
4224                 phba->fc4ControlRequests++;
4225         }
4226         if (phba->sli_rev == 3 &&
4227             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4228                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4229         /*
4230          * Finish initializing those IOCB fields that are independent
4231          * of the scsi_cmnd request_buffer
4232          */
4233         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4234         if (sli4)
4235                 piocbq->iocb.ulpContext =
4236                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4237         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4238                 piocbq->iocb.ulpFCP2Rcvy = 1;
4239         else
4240                 piocbq->iocb.ulpFCP2Rcvy = 0;
4241
4242         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4243         piocbq->context1  = lpfc_cmd;
4244         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4245         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4246         piocbq->vport = vport;
4247 }
4248
4249 /**
4250  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4251  * @vport: The virtual port for which this call is being executed.
4252  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4253  * @lun: Logical unit number.
4254  * @task_mgmt_cmd: SCSI task management command.
4255  *
4256  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4257  * for device with SLI-3 interface spec.
4258  *
4259  * Return codes:
4260  *   0 - Error
4261  *   1 - Success
4262  **/
4263 static int
4264 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4265                              struct lpfc_scsi_buf *lpfc_cmd,
4266                              uint64_t lun,
4267                              uint8_t task_mgmt_cmd)
4268 {
4269         struct lpfc_iocbq *piocbq;
4270         IOCB_t *piocb;
4271         struct fcp_cmnd *fcp_cmnd;
4272         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4273         struct lpfc_nodelist *ndlp = rdata->pnode;
4274
4275         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4276             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4277                 return 0;
4278
4279         piocbq = &(lpfc_cmd->cur_iocbq);
4280         piocbq->vport = vport;
4281
4282         piocb = &piocbq->iocb;
4283
4284         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4285         /* Clear out any old data in the FCP command area */
4286         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4287         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4288         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4289         if (vport->phba->sli_rev == 3 &&
4290             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4291                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4292         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4293         piocb->ulpContext = ndlp->nlp_rpi;
4294         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4295                 piocb->ulpContext =
4296                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4297         }
4298         piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4299         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4300         piocb->ulpPU = 0;
4301         piocb->un.fcpi.fcpi_parm = 0;
4302
4303         /* ulpTimeout is only one byte */
4304         if (lpfc_cmd->timeout > 0xff) {
4305                 /*
4306                  * Do not timeout the command at the firmware level.
4307                  * The driver will provide the timeout mechanism.
4308                  */
4309                 piocb->ulpTimeout = 0;
4310         } else
4311                 piocb->ulpTimeout = lpfc_cmd->timeout;
4312
4313         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4314                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4315
4316         return 1;
4317 }
4318
4319 /**
4320  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4321  * @phba: The hba struct for which this call is being executed.
4322  * @dev_grp: The HBA PCI-Device group number.
4323  *
4324  * This routine sets up the SCSI interface API function jump table in @phba
4325  * struct.
4326  * Returns: 0 - success, -ENODEV - failure.
4327  **/
4328 int
4329 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4330 {
4331
4332         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4333         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4334
4335         switch (dev_grp) {
4336         case LPFC_PCI_DEV_LP:
4337                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4338                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4339                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4340                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4341                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4342                 break;
4343         case LPFC_PCI_DEV_OC:
4344                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4345                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4346                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4347                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4348                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4349                 break;
4350         default:
4351                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4352                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4353                                 dev_grp);
4354                 return -ENODEV;
4355                 break;
4356         }
4357         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4358         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4359         return 0;
4360 }
4361
4362 /**
4363  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4364  * @phba: The Hba for which this call is being executed.
4365  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4366  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4367  *
4368  * This routine is IOCB completion routine for device reset and target reset
4369  * routine. This routine release scsi buffer associated with lpfc_cmd.
4370  **/
4371 static void
4372 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4373                         struct lpfc_iocbq *cmdiocbq,
4374                         struct lpfc_iocbq *rspiocbq)
4375 {
4376         struct lpfc_scsi_buf *lpfc_cmd =
4377                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4378         if (lpfc_cmd)
4379                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4380         return;
4381 }
4382
4383 /**
4384  * lpfc_info - Info entry point of scsi_host_template data structure
4385  * @host: The scsi host for which this call is being executed.
4386  *
4387  * This routine provides module information about hba.
4388  *
4389  * Reutrn code:
4390  *   Pointer to char - Success.
4391  **/
4392 const char *
4393 lpfc_info(struct Scsi_Host *host)
4394 {
4395         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4396         struct lpfc_hba   *phba = vport->phba;
4397         int len, link_speed = 0;
4398         static char  lpfcinfobuf[384];
4399
4400         memset(lpfcinfobuf,0,384);
4401         if (phba && phba->pcidev){
4402                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4403                 len = strlen(lpfcinfobuf);
4404                 snprintf(lpfcinfobuf + len,
4405                         384-len,
4406                         " on PCI bus %02x device %02x irq %d",
4407                         phba->pcidev->bus->number,
4408                         phba->pcidev->devfn,
4409                         phba->pcidev->irq);
4410                 len = strlen(lpfcinfobuf);
4411                 if (phba->Port[0]) {
4412                         snprintf(lpfcinfobuf + len,
4413                                  384-len,
4414                                  " port %s",
4415                                  phba->Port);
4416                 }
4417                 len = strlen(lpfcinfobuf);
4418                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4419                         link_speed = lpfc_sli_port_speed_get(phba);
4420                 } else {
4421                         if (phba->sli4_hba.link_state.logical_speed)
4422                                 link_speed =
4423                                       phba->sli4_hba.link_state.logical_speed;
4424                         else
4425                                 link_speed = phba->sli4_hba.link_state.speed;
4426                 }
4427                 if (link_speed != 0)
4428                         snprintf(lpfcinfobuf + len, 384-len,
4429                                  " Logical Link Speed: %d Mbps", link_speed);
4430         }
4431         return lpfcinfobuf;
4432 }
4433
4434 /**
4435  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4436  * @phba: The Hba for which this call is being executed.
4437  *
4438  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4439  * The default value of cfg_poll_tmo is 10 milliseconds.
4440  **/
4441 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4442 {
4443         unsigned long  poll_tmo_expires =
4444                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4445
4446         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4447                 mod_timer(&phba->fcp_poll_timer,
4448                           poll_tmo_expires);
4449 }
4450
4451 /**
4452  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4453  * @phba: The Hba for which this call is being executed.
4454  *
4455  * This routine starts the fcp_poll_timer of @phba.
4456  **/
4457 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4458 {
4459         lpfc_poll_rearm_timer(phba);
4460 }
4461
4462 /**
4463  * lpfc_poll_timeout - Restart polling timer
4464  * @ptr: Map to lpfc_hba data structure pointer.
4465  *
4466  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4467  * and FCP Ring interrupt is disable.
4468  **/
4469
4470 void lpfc_poll_timeout(unsigned long ptr)
4471 {
4472         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4473
4474         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4475                 lpfc_sli_handle_fast_ring_event(phba,
4476                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4477
4478                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4479                         lpfc_poll_rearm_timer(phba);
4480         }
4481 }
4482
4483 /**
4484  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4485  * @cmnd: Pointer to scsi_cmnd data structure.
4486  * @done: Pointer to done routine.
4487  *
4488  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4489  * This routine prepares an IOCB from scsi command and provides to firmware.
4490  * The @done callback is invoked after driver finished processing the command.
4491  *
4492  * Return value :
4493  *   0 - Success
4494  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4495  **/
4496 static int
4497 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4498 {
4499         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4500         struct lpfc_hba   *phba = vport->phba;
4501         struct lpfc_rport_data *rdata;
4502         struct lpfc_nodelist *ndlp;
4503         struct lpfc_scsi_buf *lpfc_cmd;
4504         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4505         int err;
4506
4507         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4508         err = fc_remote_port_chkready(rport);
4509         if (err) {
4510                 cmnd->result = err;
4511                 goto out_fail_command;
4512         }
4513         ndlp = rdata->pnode;
4514
4515         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4516                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4517
4518                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4519                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4520                                 " op:%02x str=%s without registering for"
4521                                 " BlockGuard - Rejecting command\n",
4522                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4523                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4524                 goto out_fail_command;
4525         }
4526
4527         /*
4528          * Catch race where our node has transitioned, but the
4529          * transport is still transitioning.
4530          */
4531         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4532                 goto out_tgt_busy;
4533         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4534                 goto out_tgt_busy;
4535
4536         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4537         if (lpfc_cmd == NULL) {
4538                 lpfc_rampdown_queue_depth(phba);
4539
4540                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4541                                  "0707 driver's buffer pool is empty, "
4542                                  "IO busied\n");
4543                 goto out_host_busy;
4544         }
4545
4546         /*
4547          * Store the midlayer's command structure for the completion phase
4548          * and complete the command initialization.
4549          */
4550         lpfc_cmd->pCmd  = cmnd;
4551         lpfc_cmd->rdata = rdata;
4552         lpfc_cmd->timeout = 0;
4553         lpfc_cmd->start_time = jiffies;
4554         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4555
4556         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4557                 if (vport->phba->cfg_enable_bg) {
4558                         lpfc_printf_vlog(vport,
4559                                          KERN_INFO, LOG_SCSI_CMD,
4560                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4561                                          "sector x%llx cnt %u pt %x\n",
4562                                          dif_op_str[scsi_get_prot_op(cmnd)],
4563                                          cmnd->cmnd[0],
4564                                          (unsigned long long)scsi_get_lba(cmnd),
4565                                          blk_rq_sectors(cmnd->request),
4566                                          (cmnd->cmnd[1]>>5));
4567                 }
4568                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4569         } else {
4570                 if (vport->phba->cfg_enable_bg) {
4571                         lpfc_printf_vlog(vport,
4572                                          KERN_INFO, LOG_SCSI_CMD,
4573                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4574                                          "x%x sector x%llx cnt %u pt %x\n",
4575                                          cmnd->cmnd[0],
4576                                          (unsigned long long)scsi_get_lba(cmnd),
4577                                          blk_rq_sectors(cmnd->request),
4578                                          (cmnd->cmnd[1]>>5));
4579                 }
4580                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4581         }
4582
4583         if (err)
4584                 goto out_host_busy_free_buf;
4585
4586         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4587
4588         atomic_inc(&ndlp->cmd_pending);
4589         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4590                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4591         if (err) {
4592                 atomic_dec(&ndlp->cmd_pending);
4593                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4594                                  "3376 FCP could not issue IOCB err %x"
4595                                  "FCP cmd x%x <%d/%llu> "
4596                                  "sid: x%x did: x%x oxid: x%x "
4597                                  "Data: x%x x%x x%x x%x\n",
4598                                  err, cmnd->cmnd[0],
4599                                  cmnd->device ? cmnd->device->id : 0xffff,
4600                                  cmnd->device ? cmnd->device->lun : (u64) -1,
4601                                  vport->fc_myDID, ndlp->nlp_DID,
4602                                  phba->sli_rev == LPFC_SLI_REV4 ?
4603                                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4604                                  lpfc_cmd->cur_iocbq.iocb.ulpContext,
4605                                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
4606                                  lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
4607                                  (uint32_t)
4608                                  (cmnd->request->timeout / 1000));
4609
4610
4611                 goto out_host_busy_free_buf;
4612         }
4613         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4614                 lpfc_sli_handle_fast_ring_event(phba,
4615                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4616
4617                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4618                         lpfc_poll_rearm_timer(phba);
4619         }
4620
4621         return 0;
4622
4623  out_host_busy_free_buf:
4624         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4625         lpfc_release_scsi_buf(phba, lpfc_cmd);
4626  out_host_busy:
4627         return SCSI_MLQUEUE_HOST_BUSY;
4628
4629  out_tgt_busy:
4630         return SCSI_MLQUEUE_TARGET_BUSY;
4631
4632  out_fail_command:
4633         cmnd->scsi_done(cmnd);
4634         return 0;
4635 }
4636
4637
4638 /**
4639  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4640  * @cmnd: Pointer to scsi_cmnd data structure.
4641  *
4642  * This routine aborts @cmnd pending in base driver.
4643  *
4644  * Return code :
4645  *   0x2003 - Error
4646  *   0x2002 - Success
4647  **/
4648 static int
4649 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4650 {
4651         struct Scsi_Host  *shost = cmnd->device->host;
4652         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4653         struct lpfc_hba   *phba = vport->phba;
4654         struct lpfc_iocbq *iocb;
4655         struct lpfc_iocbq *abtsiocb;
4656         struct lpfc_scsi_buf *lpfc_cmd;
4657         IOCB_t *cmd, *icmd;
4658         int ret = SUCCESS, status = 0;
4659         struct lpfc_sli_ring *pring_s4;
4660         int ring_number, ret_val;
4661         unsigned long flags, iflags;
4662         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4663
4664         status = fc_block_scsi_eh(cmnd);
4665         if (status != 0 && status != SUCCESS)
4666                 return status;
4667
4668         spin_lock_irqsave(&phba->hbalock, flags);
4669         /* driver queued commands are in process of being flushed */
4670         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4671                 spin_unlock_irqrestore(&phba->hbalock, flags);
4672                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4673                         "3168 SCSI Layer abort requested I/O has been "
4674                         "flushed by LLD.\n");
4675                 return FAILED;
4676         }
4677
4678         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4679         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4680                 spin_unlock_irqrestore(&phba->hbalock, flags);
4681                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4682                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4683                          "x%x ID %d LUN %llu\n",
4684                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4685                 return SUCCESS;
4686         }
4687
4688         iocb = &lpfc_cmd->cur_iocbq;
4689         /* the command is in process of being cancelled */
4690         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4691                 spin_unlock_irqrestore(&phba->hbalock, flags);
4692                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4693                         "3169 SCSI Layer abort requested I/O has been "
4694                         "cancelled by LLD.\n");
4695                 return FAILED;
4696         }
4697         /*
4698          * If pCmd field of the corresponding lpfc_scsi_buf structure
4699          * points to a different SCSI command, then the driver has
4700          * already completed this command, but the midlayer did not
4701          * see the completion before the eh fired. Just return SUCCESS.
4702          */
4703         if (lpfc_cmd->pCmd != cmnd) {
4704                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4705                         "3170 SCSI Layer abort requested I/O has been "
4706                         "completed by LLD.\n");
4707                 goto out_unlock;
4708         }
4709
4710         BUG_ON(iocb->context1 != lpfc_cmd);
4711
4712         /* abort issued in recovery is still in progress */
4713         if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
4714                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4715                          "3389 SCSI Layer I/O Abort Request is pending\n");
4716                 spin_unlock_irqrestore(&phba->hbalock, flags);
4717                 goto wait_for_cmpl;
4718         }
4719
4720         abtsiocb = __lpfc_sli_get_iocbq(phba);
4721         if (abtsiocb == NULL) {
4722                 ret = FAILED;
4723                 goto out_unlock;
4724         }
4725
4726         /* Indicate the IO is being aborted by the driver. */
4727         iocb->iocb_flag |= LPFC_DRIVER_ABORTED;
4728
4729         /*
4730          * The scsi command can not be in txq and it is in flight because the
4731          * pCmd is still pointig at the SCSI command we have to abort. There
4732          * is no need to search the txcmplq. Just send an abort to the FW.
4733          */
4734
4735         cmd = &iocb->iocb;
4736         icmd = &abtsiocb->iocb;
4737         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4738         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4739         if (phba->sli_rev == LPFC_SLI_REV4)
4740                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4741         else
4742                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4743
4744         icmd->ulpLe = 1;
4745         icmd->ulpClass = cmd->ulpClass;
4746
4747         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4748         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4749         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4750         if (iocb->iocb_flag & LPFC_IO_FOF)
4751                 abtsiocb->iocb_flag |= LPFC_IO_FOF;
4752
4753         if (lpfc_is_link_up(phba))
4754                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4755         else
4756                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4757
4758         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4759         abtsiocb->vport = vport;
4760         if (phba->sli_rev == LPFC_SLI_REV4) {
4761                 ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
4762                 pring_s4 = &phba->sli.ring[ring_number];
4763                 /* Note: both hbalock and ring_lock must be set here */
4764                 spin_lock_irqsave(&pring_s4->ring_lock, iflags);
4765                 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
4766                                                 abtsiocb, 0);
4767                 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
4768         } else {
4769                 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4770                                                 abtsiocb, 0);
4771         }
4772         /* no longer need the lock after this point */
4773         spin_unlock_irqrestore(&phba->hbalock, flags);
4774
4775
4776         if (ret_val == IOCB_ERROR) {
4777                 lpfc_sli_release_iocbq(phba, abtsiocb);
4778                 ret = FAILED;
4779                 goto out;
4780         }
4781
4782         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4783                 lpfc_sli_handle_fast_ring_event(phba,
4784                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4785
4786 wait_for_cmpl:
4787         lpfc_cmd->waitq = &waitq;
4788         /* Wait for abort to complete */
4789         wait_event_timeout(waitq,
4790                           (lpfc_cmd->pCmd != cmnd),
4791                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4792
4793         spin_lock_irqsave(shost->host_lock, flags);
4794         lpfc_cmd->waitq = NULL;
4795         spin_unlock_irqrestore(shost->host_lock, flags);
4796
4797         if (lpfc_cmd->pCmd == cmnd) {
4798                 ret = FAILED;
4799                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4800                                  "0748 abort handler timed out waiting "
4801                                  "for abortng I/O (xri:x%x) to complete: "
4802                                  "ret %#x, ID %d, LUN %llu\n",
4803                                  iocb->sli4_xritag, ret,
4804                                  cmnd->device->id, cmnd->device->lun);
4805         }
4806         goto out;
4807
4808 out_unlock:
4809         spin_unlock_irqrestore(&phba->hbalock, flags);
4810 out:
4811         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4812                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4813                          "LUN %llu\n", ret, cmnd->device->id,
4814                          cmnd->device->lun);
4815         return ret;
4816 }
4817
4818 static char *
4819 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4820 {
4821         switch (task_mgmt_cmd) {
4822         case FCP_ABORT_TASK_SET:
4823                 return "ABORT_TASK_SET";
4824         case FCP_CLEAR_TASK_SET:
4825                 return "FCP_CLEAR_TASK_SET";
4826         case FCP_BUS_RESET:
4827                 return "FCP_BUS_RESET";
4828         case FCP_LUN_RESET:
4829                 return "FCP_LUN_RESET";
4830         case FCP_TARGET_RESET:
4831                 return "FCP_TARGET_RESET";
4832         case FCP_CLEAR_ACA:
4833                 return "FCP_CLEAR_ACA";
4834         case FCP_TERMINATE_TASK:
4835                 return "FCP_TERMINATE_TASK";
4836         default:
4837                 return "unknown";
4838         }
4839 }
4840
4841
4842 /**
4843  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
4844  * @vport: The virtual port for which this call is being executed.
4845  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4846  *
4847  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
4848  *
4849  * Return code :
4850  *   0x2003 - Error
4851  *   0x2002 - Success
4852  **/
4853 static int
4854 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
4855 {
4856         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
4857         uint32_t rsp_info;
4858         uint32_t rsp_len;
4859         uint8_t  rsp_info_code;
4860         int ret = FAILED;
4861
4862
4863         if (fcprsp == NULL)
4864                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4865                                  "0703 fcp_rsp is missing\n");
4866         else {
4867                 rsp_info = fcprsp->rspStatus2;
4868                 rsp_len = be32_to_cpu(fcprsp->rspRspLen);
4869                 rsp_info_code = fcprsp->rspInfo3;
4870
4871
4872                 lpfc_printf_vlog(vport, KERN_INFO,
4873                                  LOG_FCP,
4874                                  "0706 fcp_rsp valid 0x%x,"
4875                                  " rsp len=%d code 0x%x\n",
4876                                  rsp_info,
4877                                  rsp_len, rsp_info_code);
4878
4879                 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
4880                         switch (rsp_info_code) {
4881                         case RSP_NO_FAILURE:
4882                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4883                                                  "0715 Task Mgmt No Failure\n");
4884                                 ret = SUCCESS;
4885                                 break;
4886                         case RSP_TM_NOT_SUPPORTED: /* TM rejected */
4887                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4888                                                  "0716 Task Mgmt Target "
4889                                                 "reject\n");
4890                                 break;
4891                         case RSP_TM_NOT_COMPLETED: /* TM failed */
4892                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4893                                                  "0717 Task Mgmt Target "
4894                                                 "failed TM\n");
4895                                 break;
4896                         case RSP_TM_INVALID_LU: /* TM to invalid LU! */
4897                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4898                                                  "0718 Task Mgmt to invalid "
4899                                                 "LUN\n");
4900                                 break;
4901                         }
4902                 }
4903         }
4904         return ret;
4905 }
4906
4907
4908 /**
4909  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
4910  * @vport: The virtual port for which this call is being executed.
4911  * @rdata: Pointer to remote port local data
4912  * @tgt_id: Target ID of remote device.
4913  * @lun_id: Lun number for the TMF
4914  * @task_mgmt_cmd: type of TMF to send
4915  *
4916  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
4917  * a remote port.
4918  *
4919  * Return Code:
4920  *   0x2003 - Error
4921  *   0x2002 - Success.
4922  **/
4923 static int
4924 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
4925                     unsigned  tgt_id, uint64_t lun_id,
4926                     uint8_t task_mgmt_cmd)
4927 {
4928         struct lpfc_hba   *phba = vport->phba;
4929         struct lpfc_scsi_buf *lpfc_cmd;
4930         struct lpfc_iocbq *iocbq;
4931         struct lpfc_iocbq *iocbqrsp;
4932         struct lpfc_nodelist *pnode = rdata->pnode;
4933         int ret;
4934         int status;
4935
4936         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4937                 return FAILED;
4938
4939         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
4940         if (lpfc_cmd == NULL)
4941                 return FAILED;
4942         lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
4943         lpfc_cmd->rdata = rdata;
4944
4945         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
4946                                            task_mgmt_cmd);
4947         if (!status) {
4948                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4949                 return FAILED;
4950         }
4951
4952         iocbq = &lpfc_cmd->cur_iocbq;
4953         iocbqrsp = lpfc_sli_get_iocbq(phba);
4954         if (iocbqrsp == NULL) {
4955                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4956                 return FAILED;
4957         }
4958         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
4959
4960         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4961                          "0702 Issue %s to TGT %d LUN %llu "
4962                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
4963                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
4964                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
4965                          iocbq->iocb_flag);
4966
4967         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
4968                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
4969         if ((status != IOCB_SUCCESS) ||
4970             (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
4971                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4972                          "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) "
4973                          "iocb_flag x%x\n",
4974                          lpfc_taskmgmt_name(task_mgmt_cmd),
4975                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
4976                          iocbqrsp->iocb.un.ulpWord[4],
4977                          iocbq->iocb_flag);
4978                 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
4979                 if (status == IOCB_SUCCESS) {
4980                         if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
4981                                 /* Something in the FCP_RSP was invalid.
4982                                  * Check conditions */
4983                                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
4984                         else
4985                                 ret = FAILED;
4986                 } else if (status == IOCB_TIMEDOUT) {
4987                         ret = TIMEOUT_ERROR;
4988                 } else {
4989                         ret = FAILED;
4990                 }
4991                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4992         } else
4993                 ret = SUCCESS;
4994
4995         lpfc_sli_release_iocbq(phba, iocbqrsp);
4996
4997         if (ret != TIMEOUT_ERROR)
4998                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4999
5000         return ret;
5001 }
5002
5003 /**
5004  * lpfc_chk_tgt_mapped -
5005  * @vport: The virtual port to check on
5006  * @cmnd: Pointer to scsi_cmnd data structure.
5007  *
5008  * This routine delays until the scsi target (aka rport) for the
5009  * command exists (is present and logged in) or we declare it non-existent.
5010  *
5011  * Return code :
5012  *  0x2003 - Error
5013  *  0x2002 - Success
5014  **/
5015 static int
5016 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5017 {
5018         struct lpfc_rport_data *rdata;
5019         struct lpfc_nodelist *pnode;
5020         unsigned long later;
5021
5022         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5023         if (!rdata) {
5024                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5025                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5026                 return FAILED;
5027         }
5028         pnode = rdata->pnode;
5029         /*
5030          * If target is not in a MAPPED state, delay until
5031          * target is rediscovered or devloss timeout expires.
5032          */
5033         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5034         while (time_after(later, jiffies)) {
5035                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5036                         return FAILED;
5037                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5038                         return SUCCESS;
5039                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5040                 rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5041                 if (!rdata)
5042                         return FAILED;
5043                 pnode = rdata->pnode;
5044         }
5045         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5046             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5047                 return FAILED;
5048         return SUCCESS;
5049 }
5050
5051 /**
5052  * lpfc_reset_flush_io_context -
5053  * @vport: The virtual port (scsi_host) for the flush context
5054  * @tgt_id: If aborting by Target contect - specifies the target id
5055  * @lun_id: If aborting by Lun context - specifies the lun id
5056  * @context: specifies the context level to flush at.
5057  *
5058  * After a reset condition via TMF, we need to flush orphaned i/o
5059  * contexts from the adapter. This routine aborts any contexts
5060  * outstanding, then waits for their completions. The wait is
5061  * bounded by devloss_tmo though.
5062  *
5063  * Return code :
5064  *  0x2003 - Error
5065  *  0x2002 - Success
5066  **/
5067 static int
5068 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5069                         uint64_t lun_id, lpfc_ctx_cmd context)
5070 {
5071         struct lpfc_hba   *phba = vport->phba;
5072         unsigned long later;
5073         int cnt;
5074
5075         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5076         if (cnt)
5077                 lpfc_sli_abort_taskmgmt(vport,
5078                                         &phba->sli.ring[phba->sli.fcp_ring],
5079                                         tgt_id, lun_id, context);
5080         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5081         while (time_after(later, jiffies) && cnt) {
5082                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5083                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5084         }
5085         if (cnt) {
5086                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5087                         "0724 I/O flush failure for context %s : cnt x%x\n",
5088                         ((context == LPFC_CTX_LUN) ? "LUN" :
5089                          ((context == LPFC_CTX_TGT) ? "TGT" :
5090                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5091                         cnt);
5092                 return FAILED;
5093         }
5094         return SUCCESS;
5095 }
5096
5097 /**
5098  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5099  * @cmnd: Pointer to scsi_cmnd data structure.
5100  *
5101  * This routine does a device reset by sending a LUN_RESET task management
5102  * command.
5103  *
5104  * Return code :
5105  *  0x2003 - Error
5106  *  0x2002 - Success
5107  **/
5108 static int
5109 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5110 {
5111         struct Scsi_Host  *shost = cmnd->device->host;
5112         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5113         struct lpfc_rport_data *rdata;
5114         struct lpfc_nodelist *pnode;
5115         unsigned tgt_id = cmnd->device->id;
5116         uint64_t lun_id = cmnd->device->lun;
5117         struct lpfc_scsi_event_header scsi_event;
5118         int status;
5119
5120         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5121         if (!rdata || !rdata->pnode) {
5122                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5123                                  "0798 Device Reset rport failure: rdata x%p\n",
5124                                  rdata);
5125                 return FAILED;
5126         }
5127         pnode = rdata->pnode;
5128         status = fc_block_scsi_eh(cmnd);
5129         if (status != 0 && status != SUCCESS)
5130                 return status;
5131
5132         status = lpfc_chk_tgt_mapped(vport, cmnd);
5133         if (status == FAILED) {
5134                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5135                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5136                 return FAILED;
5137         }
5138
5139         scsi_event.event_type = FC_REG_SCSI_EVENT;
5140         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5141         scsi_event.lun = lun_id;
5142         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5143         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5144
5145         fc_host_post_vendor_event(shost, fc_get_event_number(),
5146                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5147
5148         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5149                                                 FCP_LUN_RESET);
5150
5151         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5152                          "0713 SCSI layer issued Device Reset (%d, %llu) "
5153                          "return x%x\n", tgt_id, lun_id, status);
5154
5155         /*
5156          * We have to clean up i/o as : they may be orphaned by the TMF;
5157          * or if the TMF failed, they may be in an indeterminate state.
5158          * So, continue on.
5159          * We will report success if all the i/o aborts successfully.
5160          */
5161         if (status == SUCCESS)
5162                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5163                                                 LPFC_CTX_LUN);
5164
5165         return status;
5166 }
5167
5168 /**
5169  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5170  * @cmnd: Pointer to scsi_cmnd data structure.
5171  *
5172  * This routine does a target reset by sending a TARGET_RESET task management
5173  * command.
5174  *
5175  * Return code :
5176  *  0x2003 - Error
5177  *  0x2002 - Success
5178  **/
5179 static int
5180 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5181 {
5182         struct Scsi_Host  *shost = cmnd->device->host;
5183         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5184         struct lpfc_rport_data *rdata;
5185         struct lpfc_nodelist *pnode;
5186         unsigned tgt_id = cmnd->device->id;
5187         uint64_t lun_id = cmnd->device->lun;
5188         struct lpfc_scsi_event_header scsi_event;
5189         int status;
5190
5191         rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5192         if (!rdata) {
5193                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5194                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5195                 return FAILED;
5196         }
5197         pnode = rdata->pnode;
5198         status = fc_block_scsi_eh(cmnd);
5199         if (status != 0 && status != SUCCESS)
5200                 return status;
5201
5202         status = lpfc_chk_tgt_mapped(vport, cmnd);
5203         if (status == FAILED) {
5204                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5205                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5206                 if (pnode) {
5207                         spin_lock_irq(shost->host_lock);
5208                         pnode->nlp_flag &= ~NLP_NPR_ADISC;
5209                         pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5210                         spin_unlock_irq(shost->host_lock);
5211                 }
5212                 lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5213                                           LPFC_CTX_TGT);
5214                 return FAST_IO_FAIL;
5215         }
5216
5217         scsi_event.event_type = FC_REG_SCSI_EVENT;
5218         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5219         scsi_event.lun = 0;
5220         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5221         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5222
5223         fc_host_post_vendor_event(shost, fc_get_event_number(),
5224                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5225
5226         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5227                                         FCP_TARGET_RESET);
5228
5229         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5230                          "0723 SCSI layer issued Target Reset (%d, %llu) "
5231                          "return x%x\n", tgt_id, lun_id, status);
5232
5233         /*
5234          * We have to clean up i/o as : they may be orphaned by the TMF;
5235          * or if the TMF failed, they may be in an indeterminate state.
5236          * So, continue on.
5237          * We will report success if all the i/o aborts successfully.
5238          */
5239         if (status == SUCCESS)
5240                 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5241                                           LPFC_CTX_TGT);
5242         return status;
5243 }
5244
5245 /**
5246  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5247  * @cmnd: Pointer to scsi_cmnd data structure.
5248  *
5249  * This routine does target reset to all targets on @cmnd->device->host.
5250  * This emulates Parallel SCSI Bus Reset Semantics.
5251  *
5252  * Return code :
5253  *  0x2003 - Error
5254  *  0x2002 - Success
5255  **/
5256 static int
5257 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5258 {
5259         struct Scsi_Host  *shost = cmnd->device->host;
5260         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5261         struct lpfc_nodelist *ndlp = NULL;
5262         struct lpfc_scsi_event_header scsi_event;
5263         int match;
5264         int ret = SUCCESS, status, i;
5265
5266         scsi_event.event_type = FC_REG_SCSI_EVENT;
5267         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5268         scsi_event.lun = 0;
5269         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5270         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5271
5272         fc_host_post_vendor_event(shost, fc_get_event_number(),
5273                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5274
5275         status = fc_block_scsi_eh(cmnd);
5276         if (status != 0 && status != SUCCESS)
5277                 return status;
5278
5279         /*
5280          * Since the driver manages a single bus device, reset all
5281          * targets known to the driver.  Should any target reset
5282          * fail, this routine returns failure to the midlayer.
5283          */
5284         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5285                 /* Search for mapped node by target ID */
5286                 match = 0;
5287                 spin_lock_irq(shost->host_lock);
5288                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5289                         if (!NLP_CHK_NODE_ACT(ndlp))
5290                                 continue;
5291                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5292                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5293                                 continue;
5294                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5295                             ndlp->nlp_sid == i &&
5296                             ndlp->rport) {
5297                                 match = 1;
5298                                 break;
5299                         }
5300                 }
5301                 spin_unlock_irq(shost->host_lock);
5302                 if (!match)
5303                         continue;
5304
5305                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5306                                         i, 0, FCP_TARGET_RESET);
5307
5308                 if (status != SUCCESS) {
5309                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5310                                          "0700 Bus Reset on target %d failed\n",
5311                                          i);
5312                         ret = FAILED;
5313                 }
5314         }
5315         /*
5316          * We have to clean up i/o as : they may be orphaned by the TMFs
5317          * above; or if any of the TMFs failed, they may be in an
5318          * indeterminate state.
5319          * We will report success if all the i/o aborts successfully.
5320          */
5321
5322         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5323         if (status != SUCCESS)
5324                 ret = FAILED;
5325
5326         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5327                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5328         return ret;
5329 }
5330
5331 /**
5332  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5333  * @cmnd: Pointer to scsi_cmnd data structure.
5334  *
5335  * This routine does host reset to the adaptor port. It brings the HBA
5336  * offline, performs a board restart, and then brings the board back online.
5337  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5338  * reject all outstanding SCSI commands to the host and error returned
5339  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5340  * of error handling, it will only return error if resetting of the adapter
5341  * is not successful; in all other cases, will return success.
5342  *
5343  * Return code :
5344  *  0x2003 - Error
5345  *  0x2002 - Success
5346  **/
5347 static int
5348 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5349 {
5350         struct Scsi_Host *shost = cmnd->device->host;
5351         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5352         struct lpfc_hba *phba = vport->phba;
5353         int rc, ret = SUCCESS;
5354
5355         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5356                          "3172 SCSI layer issued Host Reset Data:\n");
5357
5358         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5359         lpfc_offline(phba);
5360         rc = lpfc_sli_brdrestart(phba);
5361         if (rc)
5362                 ret = FAILED;
5363         rc = lpfc_online(phba);
5364         if (rc)
5365                 ret = FAILED;
5366         lpfc_unblock_mgmt_io(phba);
5367
5368         if (ret == FAILED) {
5369                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5370                                  "3323 Failed host reset, bring it offline\n");
5371                 lpfc_sli4_offline_eratt(phba);
5372         }
5373         return ret;
5374 }
5375
5376 /**
5377  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5378  * @sdev: Pointer to scsi_device.
5379  *
5380  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5381  * globally available list of scsi buffers. This routine also makes sure scsi
5382  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5383  * of scsi buffer exists for the lifetime of the driver.
5384  *
5385  * Return codes:
5386  *   non-0 - Error
5387  *   0 - Success
5388  **/
5389 static int
5390 lpfc_slave_alloc(struct scsi_device *sdev)
5391 {
5392         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5393         struct lpfc_hba   *phba = vport->phba;
5394         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5395         uint32_t total = 0;
5396         uint32_t num_to_alloc = 0;
5397         int num_allocated = 0;
5398         uint32_t sdev_cnt;
5399         struct lpfc_device_data *device_data;
5400         unsigned long flags;
5401         struct lpfc_name target_wwpn;
5402
5403         if (!rport || fc_remote_port_chkready(rport))
5404                 return -ENXIO;
5405
5406         if (phba->cfg_fof) {
5407
5408                 /*
5409                  * Check to see if the device data structure for the lun
5410                  * exists.  If not, create one.
5411                  */
5412
5413                 u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
5414                 spin_lock_irqsave(&phba->devicelock, flags);
5415                 device_data = __lpfc_get_device_data(phba,
5416                                                      &phba->luns,
5417                                                      &vport->fc_portname,
5418                                                      &target_wwpn,
5419                                                      sdev->lun);
5420                 if (!device_data) {
5421                         spin_unlock_irqrestore(&phba->devicelock, flags);
5422                         device_data = lpfc_create_device_data(phba,
5423                                                         &vport->fc_portname,
5424                                                         &target_wwpn,
5425                                                         sdev->lun, true);
5426                         if (!device_data)
5427                                 return -ENOMEM;
5428                         spin_lock_irqsave(&phba->devicelock, flags);
5429                         list_add_tail(&device_data->listentry, &phba->luns);
5430                 }
5431                 device_data->rport_data = rport->dd_data;
5432                 device_data->available = true;
5433                 spin_unlock_irqrestore(&phba->devicelock, flags);
5434                 sdev->hostdata = device_data;
5435         } else {
5436                 sdev->hostdata = rport->dd_data;
5437         }
5438         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5439
5440         /*
5441          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5442          * available list of scsi buffers.  Don't allocate more than the
5443          * HBA limit conveyed to the midlayer via the host structure.  The
5444          * formula accounts for the lun_queue_depth + error handlers + 1
5445          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5446          */
5447         total = phba->total_scsi_bufs;
5448         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5449
5450         /* If allocated buffers are enough do nothing */
5451         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5452                 return 0;
5453
5454         /* Allow some exchanges to be available always to complete discovery */
5455         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5456                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5457                                  "0704 At limitation of %d preallocated "
5458                                  "command buffers\n", total);
5459                 return 0;
5460         /* Allow some exchanges to be available always to complete discovery */
5461         } else if (total + num_to_alloc >
5462                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5463                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5464                                  "0705 Allocation request of %d "
5465                                  "command buffers will exceed max of %d.  "
5466                                  "Reducing allocation request to %d.\n",
5467                                  num_to_alloc, phba->cfg_hba_queue_depth,
5468                                  (phba->cfg_hba_queue_depth - total));
5469                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5470         }
5471         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5472         if (num_to_alloc != num_allocated) {
5473                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5474                                          "0708 Allocation request of %d "
5475                                          "command buffers did not succeed.  "
5476                                          "Allocated %d buffers.\n",
5477                                          num_to_alloc, num_allocated);
5478         }
5479         if (num_allocated > 0)
5480                 phba->total_scsi_bufs += num_allocated;
5481         return 0;
5482 }
5483
5484 /**
5485  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5486  * @sdev: Pointer to scsi_device.
5487  *
5488  * This routine configures following items
5489  *   - Tag command queuing support for @sdev if supported.
5490  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5491  *
5492  * Return codes:
5493  *   0 - Success
5494  **/
5495 static int
5496 lpfc_slave_configure(struct scsi_device *sdev)
5497 {
5498         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5499         struct lpfc_hba   *phba = vport->phba;
5500
5501         scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
5502
5503         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5504                 lpfc_sli_handle_fast_ring_event(phba,
5505                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5506                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5507                         lpfc_poll_rearm_timer(phba);
5508         }
5509
5510         return 0;
5511 }
5512
5513 /**
5514  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5515  * @sdev: Pointer to scsi_device.
5516  *
5517  * This routine sets @sdev hostatdata filed to null.
5518  **/
5519 static void
5520 lpfc_slave_destroy(struct scsi_device *sdev)
5521 {
5522         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5523         struct lpfc_hba   *phba = vport->phba;
5524         unsigned long flags;
5525         struct lpfc_device_data *device_data = sdev->hostdata;
5526
5527         atomic_dec(&phba->sdev_cnt);
5528         if ((phba->cfg_fof) && (device_data)) {
5529                 spin_lock_irqsave(&phba->devicelock, flags);
5530                 device_data->available = false;
5531                 if (!device_data->oas_enabled)
5532                         lpfc_delete_device_data(phba, device_data);
5533                 spin_unlock_irqrestore(&phba->devicelock, flags);
5534         }
5535         sdev->hostdata = NULL;
5536         return;
5537 }
5538
5539 /**
5540  * lpfc_create_device_data - creates and initializes device data structure for OAS
5541  * @pha: Pointer to host bus adapter structure.
5542  * @vport_wwpn: Pointer to vport's wwpn information
5543  * @target_wwpn: Pointer to target's wwpn information
5544  * @lun: Lun on target
5545  * @atomic_create: Flag to indicate if memory should be allocated using the
5546  *                GFP_ATOMIC flag or not.
5547  *
5548  * This routine creates a device data structure which will contain identifying
5549  * information for the device (host wwpn, target wwpn, lun), state of OAS,
5550  * whether or not the corresponding lun is available by the system,
5551  * and pointer to the rport data.
5552  *
5553  * Return codes:
5554  *   NULL - Error
5555  *   Pointer to lpfc_device_data - Success
5556  **/
5557 struct lpfc_device_data*
5558 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5559                         struct lpfc_name *target_wwpn, uint64_t lun,
5560                         bool atomic_create)
5561 {
5562
5563         struct lpfc_device_data *lun_info;
5564         int memory_flags;
5565
5566         if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5567             !(phba->cfg_fof))
5568                 return NULL;
5569
5570         /* Attempt to create the device data to contain lun info */
5571
5572         if (atomic_create)
5573                 memory_flags = GFP_ATOMIC;
5574         else
5575                 memory_flags = GFP_KERNEL;
5576         lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
5577         if (!lun_info)
5578                 return NULL;
5579         INIT_LIST_HEAD(&lun_info->listentry);
5580         lun_info->rport_data  = NULL;
5581         memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
5582                sizeof(struct lpfc_name));
5583         memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
5584                sizeof(struct lpfc_name));
5585         lun_info->device_id.lun = lun;
5586         lun_info->oas_enabled = false;
5587         lun_info->available = false;
5588         return lun_info;
5589 }
5590
5591 /**
5592  * lpfc_delete_device_data - frees a device data structure for OAS
5593  * @pha: Pointer to host bus adapter structure.
5594  * @lun_info: Pointer to device data structure to free.
5595  *
5596  * This routine frees the previously allocated device data structure passed.
5597  *
5598  **/
5599 void
5600 lpfc_delete_device_data(struct lpfc_hba *phba,
5601                         struct lpfc_device_data *lun_info)
5602 {
5603
5604         if (unlikely(!phba) || !lun_info  ||
5605             !(phba->cfg_fof))
5606                 return;
5607
5608         if (!list_empty(&lun_info->listentry))
5609                 list_del(&lun_info->listentry);
5610         mempool_free(lun_info, phba->device_data_mem_pool);
5611         return;
5612 }
5613
5614 /**
5615  * __lpfc_get_device_data - returns the device data for the specified lun
5616  * @pha: Pointer to host bus adapter structure.
5617  * @list: Point to list to search.
5618  * @vport_wwpn: Pointer to vport's wwpn information
5619  * @target_wwpn: Pointer to target's wwpn information
5620  * @lun: Lun on target
5621  *
5622  * This routine searches the list passed for the specified lun's device data.
5623  * This function does not hold locks, it is the responsibility of the caller
5624  * to ensure the proper lock is held before calling the function.
5625  *
5626  * Return codes:
5627  *   NULL - Error
5628  *   Pointer to lpfc_device_data - Success
5629  **/
5630 struct lpfc_device_data*
5631 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
5632                        struct lpfc_name *vport_wwpn,
5633                        struct lpfc_name *target_wwpn, uint64_t lun)
5634 {
5635
5636         struct lpfc_device_data *lun_info;
5637
5638         if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5639             !phba->cfg_fof)
5640                 return NULL;
5641
5642         /* Check to see if the lun is already enabled for OAS. */
5643
5644         list_for_each_entry(lun_info, list, listentry) {
5645                 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5646                             sizeof(struct lpfc_name)) == 0) &&
5647                     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5648                             sizeof(struct lpfc_name)) == 0) &&
5649                     (lun_info->device_id.lun == lun))
5650                         return lun_info;
5651         }
5652
5653         return NULL;
5654 }
5655
5656 /**
5657  * lpfc_find_next_oas_lun - searches for the next oas lun
5658  * @pha: Pointer to host bus adapter structure.
5659  * @vport_wwpn: Pointer to vport's wwpn information
5660  * @target_wwpn: Pointer to target's wwpn information
5661  * @starting_lun: Pointer to the lun to start searching for
5662  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
5663  * @found_target_wwpn: Pointer to the found lun's target wwpn information
5664  * @found_lun: Pointer to the found lun.
5665  * @found_lun_status: Pointer to status of the found lun.
5666  *
5667  * This routine searches the luns list for the specified lun
5668  * or the first lun for the vport/target.  If the vport wwpn contains
5669  * a zero value then a specific vport is not specified. In this case
5670  * any vport which contains the lun will be considered a match.  If the
5671  * target wwpn contains a zero value then a specific target is not specified.
5672  * In this case any target which contains the lun will be considered a
5673  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
5674  * are returned.  The function will also return the next lun if available.
5675  * If the next lun is not found, starting_lun parameter will be set to
5676  * NO_MORE_OAS_LUN.
5677  *
5678  * Return codes:
5679  *   non-0 - Error
5680  *   0 - Success
5681  **/
5682 bool
5683 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5684                        struct lpfc_name *target_wwpn, uint64_t *starting_lun,
5685                        struct lpfc_name *found_vport_wwpn,
5686                        struct lpfc_name *found_target_wwpn,
5687                        uint64_t *found_lun,
5688                        uint32_t *found_lun_status)
5689 {
5690
5691         unsigned long flags;
5692         struct lpfc_device_data *lun_info;
5693         struct lpfc_device_id *device_id;
5694         uint64_t lun;
5695         bool found = false;
5696
5697         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5698             !starting_lun || !found_vport_wwpn ||
5699             !found_target_wwpn || !found_lun || !found_lun_status ||
5700             (*starting_lun == NO_MORE_OAS_LUN) ||
5701             !phba->cfg_fof)
5702                 return false;
5703
5704         lun = *starting_lun;
5705         *found_lun = NO_MORE_OAS_LUN;
5706         *starting_lun = NO_MORE_OAS_LUN;
5707
5708         /* Search for lun or the lun closet in value */
5709
5710         spin_lock_irqsave(&phba->devicelock, flags);
5711         list_for_each_entry(lun_info, &phba->luns, listentry) {
5712                 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
5713                      (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
5714                             sizeof(struct lpfc_name)) == 0)) &&
5715                     ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
5716                      (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
5717                             sizeof(struct lpfc_name)) == 0)) &&
5718                     (lun_info->oas_enabled)) {
5719                         device_id = &lun_info->device_id;
5720                         if ((!found) &&
5721                             ((lun == FIND_FIRST_OAS_LUN) ||
5722                              (device_id->lun == lun))) {
5723                                 *found_lun = device_id->lun;
5724                                 memcpy(found_vport_wwpn,
5725                                        &device_id->vport_wwpn,
5726                                        sizeof(struct lpfc_name));
5727                                 memcpy(found_target_wwpn,
5728                                        &device_id->target_wwpn,
5729                                        sizeof(struct lpfc_name));
5730                                 if (lun_info->available)
5731                                         *found_lun_status =
5732                                                 OAS_LUN_STATUS_EXISTS;
5733                                 else
5734                                         *found_lun_status = 0;
5735                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
5736                                         memset(vport_wwpn, 0x0,
5737                                                sizeof(struct lpfc_name));
5738                                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
5739                                         memset(target_wwpn, 0x0,
5740                                                sizeof(struct lpfc_name));
5741                                 found = true;
5742                         } else if (found) {
5743                                 *starting_lun = device_id->lun;
5744                                 memcpy(vport_wwpn, &device_id->vport_wwpn,
5745                                        sizeof(struct lpfc_name));
5746                                 memcpy(target_wwpn, &device_id->target_wwpn,
5747                                        sizeof(struct lpfc_name));
5748                                 break;
5749                         }
5750                 }
5751         }
5752         spin_unlock_irqrestore(&phba->devicelock, flags);
5753         return found;
5754 }
5755
5756 /**
5757  * lpfc_enable_oas_lun - enables a lun for OAS operations
5758  * @pha: Pointer to host bus adapter structure.
5759  * @vport_wwpn: Pointer to vport's wwpn information
5760  * @target_wwpn: Pointer to target's wwpn information
5761  * @lun: Lun
5762  *
5763  * This routine enables a lun for oas operations.  The routines does so by
5764  * doing the following :
5765  *
5766  *   1) Checks to see if the device data for the lun has been created.
5767  *   2) If found, sets the OAS enabled flag if not set and returns.
5768  *   3) Otherwise, creates a device data structure.
5769  *   4) If successfully created, indicates the device data is for an OAS lun,
5770  *   indicates the lun is not available and add to the list of luns.
5771  *
5772  * Return codes:
5773  *   false - Error
5774  *   true - Success
5775  **/
5776 bool
5777 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5778                     struct lpfc_name *target_wwpn, uint64_t lun)
5779 {
5780
5781         struct lpfc_device_data *lun_info;
5782         unsigned long flags;
5783
5784         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5785             !phba->cfg_fof)
5786                 return false;
5787
5788         spin_lock_irqsave(&phba->devicelock, flags);
5789
5790         /* Check to see if the device data for the lun has been created */
5791         lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
5792                                           target_wwpn, lun);
5793         if (lun_info) {
5794                 if (!lun_info->oas_enabled)
5795                         lun_info->oas_enabled = true;
5796                 spin_unlock_irqrestore(&phba->devicelock, flags);
5797                 return true;
5798         }
5799
5800         /* Create an lun info structure and add to list of luns */
5801         lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5802                                            false);
5803         if (lun_info) {
5804                 lun_info->oas_enabled = true;
5805                 lun_info->available = false;
5806                 list_add_tail(&lun_info->listentry, &phba->luns);
5807                 spin_unlock_irqrestore(&phba->devicelock, flags);
5808                 return true;
5809         }
5810         spin_unlock_irqrestore(&phba->devicelock, flags);
5811         return false;
5812 }
5813
5814 /**
5815  * lpfc_disable_oas_lun - disables a lun for OAS operations
5816  * @pha: Pointer to host bus adapter structure.
5817  * @vport_wwpn: Pointer to vport's wwpn information
5818  * @target_wwpn: Pointer to target's wwpn information
5819  * @lun: Lun
5820  *
5821  * This routine disables a lun for oas operations.  The routines does so by
5822  * doing the following :
5823  *
5824  *   1) Checks to see if the device data for the lun is created.
5825  *   2) If present, clears the flag indicating this lun is for OAS.
5826  *   3) If the lun is not available by the system, the device data is
5827  *   freed.
5828  *
5829  * Return codes:
5830  *   false - Error
5831  *   true - Success
5832  **/
5833 bool
5834 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5835                      struct lpfc_name *target_wwpn, uint64_t lun)
5836 {
5837
5838         struct lpfc_device_data *lun_info;
5839         unsigned long flags;
5840
5841         if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5842             !phba->cfg_fof)
5843                 return false;
5844
5845         spin_lock_irqsave(&phba->devicelock, flags);
5846
5847         /* Check to see if the lun is available. */
5848         lun_info = __lpfc_get_device_data(phba,
5849                                           &phba->luns, vport_wwpn,
5850                                           target_wwpn, lun);
5851         if (lun_info) {
5852                 lun_info->oas_enabled = false;
5853                 if (!lun_info->available)
5854                         lpfc_delete_device_data(phba, lun_info);
5855                 spin_unlock_irqrestore(&phba->devicelock, flags);
5856                 return true;
5857         }
5858
5859         spin_unlock_irqrestore(&phba->devicelock, flags);
5860         return false;
5861 }
5862
5863 struct scsi_host_template lpfc_template_s3 = {
5864         .module                 = THIS_MODULE,
5865         .name                   = LPFC_DRIVER_NAME,
5866         .info                   = lpfc_info,
5867         .queuecommand           = lpfc_queuecommand,
5868         .eh_abort_handler       = lpfc_abort_handler,
5869         .eh_device_reset_handler = lpfc_device_reset_handler,
5870         .eh_target_reset_handler = lpfc_target_reset_handler,
5871         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5872         .slave_alloc            = lpfc_slave_alloc,
5873         .slave_configure        = lpfc_slave_configure,
5874         .slave_destroy          = lpfc_slave_destroy,
5875         .scan_finished          = lpfc_scan_finished,
5876         .this_id                = -1,
5877         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5878         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5879         .use_clustering         = ENABLE_CLUSTERING,
5880         .shost_attrs            = lpfc_hba_attrs,
5881         .max_sectors            = 0xFFFF,
5882         .vendor_id              = LPFC_NL_VENDOR_ID,
5883         .change_queue_depth     = scsi_change_queue_depth,
5884         .use_blk_tags           = 1,
5885         .track_queue_depth      = 1,
5886 };
5887
5888 struct scsi_host_template lpfc_template = {
5889         .module                 = THIS_MODULE,
5890         .name                   = LPFC_DRIVER_NAME,
5891         .info                   = lpfc_info,
5892         .queuecommand           = lpfc_queuecommand,
5893         .eh_abort_handler       = lpfc_abort_handler,
5894         .eh_device_reset_handler = lpfc_device_reset_handler,
5895         .eh_target_reset_handler = lpfc_target_reset_handler,
5896         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5897         .eh_host_reset_handler  = lpfc_host_reset_handler,
5898         .slave_alloc            = lpfc_slave_alloc,
5899         .slave_configure        = lpfc_slave_configure,
5900         .slave_destroy          = lpfc_slave_destroy,
5901         .scan_finished          = lpfc_scan_finished,
5902         .this_id                = -1,
5903         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5904         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5905         .use_clustering         = ENABLE_CLUSTERING,
5906         .shost_attrs            = lpfc_hba_attrs,
5907         .max_sectors            = 0xFFFF,
5908         .vendor_id              = LPFC_NL_VENDOR_ID,
5909         .change_queue_depth     = scsi_change_queue_depth,
5910         .use_blk_tags           = 1,
5911         .track_queue_depth      = 1,
5912 };
5913
5914 struct scsi_host_template lpfc_vport_template = {
5915         .module                 = THIS_MODULE,
5916         .name                   = LPFC_DRIVER_NAME,
5917         .info                   = lpfc_info,
5918         .queuecommand           = lpfc_queuecommand,
5919         .eh_abort_handler       = lpfc_abort_handler,
5920         .eh_device_reset_handler = lpfc_device_reset_handler,
5921         .eh_target_reset_handler = lpfc_target_reset_handler,
5922         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5923         .slave_alloc            = lpfc_slave_alloc,
5924         .slave_configure        = lpfc_slave_configure,
5925         .slave_destroy          = lpfc_slave_destroy,
5926         .scan_finished          = lpfc_scan_finished,
5927         .this_id                = -1,
5928         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5929         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5930         .use_clustering         = ENABLE_CLUSTERING,
5931         .shost_attrs            = lpfc_vport_attrs,
5932         .max_sectors            = 0xFFFF,
5933         .change_queue_depth     = scsi_change_queue_depth,
5934         .use_blk_tags           = 1,
5935         .track_queue_depth      = 1,
5936 };