drivers/scsi/qla2xxx/qla_iocb.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2014 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8 #include "qla_target.h"
   9
  10 #include <linux/blkdev.h>
  11 #include <linux/delay.h>
  12
  13 #include <scsi/scsi_tcq.h>
  14
  15 /**
  16  * qla2x00_get_cmd_direction() - Determine control_flag data direction.
  17  * @sp: SCSI command
  18  *
  19  * Returns the proper CF_* direction based on CDB.
  20  */
  21 static inline uint16_t
  22 qla2x00_get_cmd_direction(srb_t *sp)
  23 {
  24         uint16_t cflags;
  25         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
  26         struct scsi_qla_host *vha = sp->vha;
  27
  28         cflags = 0;
  29
  30         /* Set transfer direction */
  31         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
  32                 cflags = CF_WRITE;
  33                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
  34                 vha->qla_stats.output_requests++;
  35         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
  36                 cflags = CF_READ;
  37                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
  38                 vha->qla_stats.input_requests++;
  39         }
  40         return (cflags);
  41 }
  42
  43 /**
  44  * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
  45  * Continuation Type 0 IOCBs to allocate.
  46  *
  47  * @dsds: number of data segment decriptors needed
  48  *
  49  * Returns the number of IOCB entries needed to store @dsds.
  50  */
  51 uint16_t
  52 qla2x00_calc_iocbs_32(uint16_t dsds)
  53 {
  54         uint16_t iocbs;
  55
  56         iocbs = 1;
  57         if (dsds > 3) {
  58                 iocbs += (dsds - 3) / 7;
  59                 if ((dsds - 3) % 7)
  60                         iocbs++;
  61         }
  62         return (iocbs);
  63 }
  64
  65 /**
  66  * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
  67  * Continuation Type 1 IOCBs to allocate.
  68  *
  69  * @dsds: number of data segment decriptors needed
  70  *
  71  * Returns the number of IOCB entries needed to store @dsds.
  72  */
  73 uint16_t
  74 qla2x00_calc_iocbs_64(uint16_t dsds)
  75 {
  76         uint16_t iocbs;
  77
  78         iocbs = 1;
  79         if (dsds > 2) {
  80                 iocbs += (dsds - 2) / 5;
  81                 if ((dsds - 2) % 5)
  82                         iocbs++;
  83         }
  84         return (iocbs);
  85 }
  86
  87 /**
  88  * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
  89  * @vha: HA context
  90  *
  91  * Returns a pointer to the Continuation Type 0 IOCB packet.
  92  */
  93 static inline cont_entry_t *
  94 qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
  95 {
  96         cont_entry_t *cont_pkt;
  97         struct req_que *req = vha->req;
  98         /* Adjust ring index. */
  99         req->ring_index++;
 100         if (req->ring_index == req->length) {
 101                 req->ring_index = 0;
 102                 req->ring_ptr = req->ring;
 103         } else {
 104                 req->ring_ptr++;
 105         }
 106
 107         cont_pkt = (cont_entry_t *)req->ring_ptr;
 108
 109         /* Load packet defaults. */
 110         put_unaligned_le32(CONTINUE_TYPE, &cont_pkt->entry_type);
 111
 112         return (cont_pkt);
 113 }
 114
 115 /**
 116  * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
 117  * @vha: HA context
 118  * @req: request queue
 119  *
 120  * Returns a pointer to the continuation type 1 IOCB packet.
 121  */
 122 static inline cont_a64_entry_t *
 123 qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
 124 {
 125         cont_a64_entry_t *cont_pkt;
 126
 127         /* Adjust ring index. */
 128         req->ring_index++;
 129         if (req->ring_index == req->length) {
 130                 req->ring_index = 0;
 131                 req->ring_ptr = req->ring;
 132         } else {
 133                 req->ring_ptr++;
 134         }
 135
 136         cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
 137
 138         /* Load packet defaults. */
 139         put_unaligned_le32(IS_QLAFX00(vha->hw) ? CONTINUE_A64_TYPE_FX00 :
 140                            CONTINUE_A64_TYPE, &cont_pkt->entry_type);
 141
 142         return (cont_pkt);
 143 }
 144
 145 inline int
 146 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 147 {
 148         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 149         uint8_t guard = scsi_host_get_guard(cmd->device->host);
 150
 151         /* We always use DIFF Bundling for best performance */
 152         *fw_prot_opts = 0;
 153
 154         /* Translate SCSI opcode to a protection opcode */
 155         switch (scsi_get_prot_op(cmd)) {
 156         case SCSI_PROT_READ_STRIP:
 157                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 158                 break;
 159         case SCSI_PROT_WRITE_INSERT:
 160                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 161                 break;
 162         case SCSI_PROT_READ_INSERT:
 163                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 164                 break;
 165         case SCSI_PROT_WRITE_STRIP:
 166                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 167                 break;
 168         case SCSI_PROT_READ_PASS:
 169         case SCSI_PROT_WRITE_PASS:
 170                 if (guard & SHOST_DIX_GUARD_IP)
 171                         *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
 172                 else
 173                         *fw_prot_opts |= PO_MODE_DIF_PASS;
 174                 break;
 175         default:        /* Normal Request */
 176                 *fw_prot_opts |= PO_MODE_DIF_PASS;
 177                 break;
 178         }
 179
 180         return scsi_prot_sg_count(cmd);
 181 }
 182
 183 /*
 184  * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 185  * capable IOCB types.
 186  *
 187  * @sp: SRB command to process
 188  * @cmd_pkt: Command type 2 IOCB
 189  * @tot_dsds: Total number of segments to transfer
 190  */
 191 void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
 192     uint16_t tot_dsds)
 193 {
 194         uint16_t        avail_dsds;
 195         struct dsd32    *cur_dsd;
 196         scsi_qla_host_t *vha;
 197         struct scsi_cmnd *cmd;
 198         struct scatterlist *sg;
 199         int i;
 200
 201         cmd = GET_CMD_SP(sp);
 202
 203         /* Update entry type to indicate Command Type 2 IOCB */
 204         put_unaligned_le32(COMMAND_TYPE, &cmd_pkt->entry_type);
 205
 206         /* No data transfer */
 207         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 208                 cmd_pkt->byte_count = cpu_to_le32(0);
 209                 return;
 210         }
 211
 212         vha = sp->vha;
 213         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 214
 215         /* Three DSDs are available in the Command Type 2 IOCB */
 216         avail_dsds = ARRAY_SIZE(cmd_pkt->dsd32);
 217         cur_dsd = cmd_pkt->dsd32;
 218
 219         /* Load data segments */
 220         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 221                 cont_entry_t *cont_pkt;
 222
 223                 /* Allocate additional continuation packets? */
 224                 if (avail_dsds == 0) {
 225                         /*
 226                          * Seven DSDs are available in the Continuation
 227                          * Type 0 IOCB.
 228                          */
 229                         cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
 230                         cur_dsd = cont_pkt->dsd;
 231                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 232                 }
 233
 234                 append_dsd32(&cur_dsd, sg);
 235                 avail_dsds--;
 236         }
 237 }
 238
 239 /**
 240  * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 241  * capable IOCB types.
 242  *
 243  * @sp: SRB command to process
 244  * @cmd_pkt: Command type 3 IOCB
 245  * @tot_dsds: Total number of segments to transfer
 246  */
 247 void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
 248     uint16_t tot_dsds)
 249 {
 250         uint16_t        avail_dsds;
 251         struct dsd64    *cur_dsd;
 252         scsi_qla_host_t *vha;
 253         struct scsi_cmnd *cmd;
 254         struct scatterlist *sg;
 255         int i;
 256
 257         cmd = GET_CMD_SP(sp);
 258
 259         /* Update entry type to indicate Command Type 3 IOCB */
 260         put_unaligned_le32(COMMAND_A64_TYPE, &cmd_pkt->entry_type);
 261
 262         /* No data transfer */
 263         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 264                 cmd_pkt->byte_count = cpu_to_le32(0);
 265                 return;
 266         }
 267
 268         vha = sp->vha;
 269         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 270
 271         /* Two DSDs are available in the Command Type 3 IOCB */
 272         avail_dsds = ARRAY_SIZE(cmd_pkt->dsd64);
 273         cur_dsd = cmd_pkt->dsd64;
 274
 275         /* Load data segments */
 276         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 277                 cont_a64_entry_t *cont_pkt;
 278
 279                 /* Allocate additional continuation packets? */
 280                 if (avail_dsds == 0) {
 281                         /*
 282                          * Five DSDs are available in the Continuation
 283                          * Type 1 IOCB.
 284                          */
 285                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 286                         cur_dsd = cont_pkt->dsd;
 287                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 288                 }
 289
 290                 append_dsd64(&cur_dsd, sg);
 291                 avail_dsds--;
 292         }
 293 }
 294
 295 /**
 296  * qla2x00_start_scsi() - Send a SCSI command to the ISP
 297  * @sp: command to send to the ISP
 298  *
 299  * Returns non-zero if a failure occurred, else zero.
 300  */
 301 int
 302 qla2x00_start_scsi(srb_t *sp)
 303 {
 304         int             nseg;
 305         unsigned long   flags;
 306         scsi_qla_host_t *vha;
 307         struct scsi_cmnd *cmd;
 308         uint32_t        *clr_ptr;
 309         uint32_t        index;
 310         uint32_t        handle;
 311         cmd_entry_t     *cmd_pkt;
 312         uint16_t        cnt;
 313         uint16_t        req_cnt;
 314         uint16_t        tot_dsds;
 315         struct device_reg_2xxx __iomem *reg;
 316         struct qla_hw_data *ha;
 317         struct req_que *req;
 318         struct rsp_que *rsp;
 319
 320         /* Setup device pointers. */
 321         vha = sp->vha;
 322         ha = vha->hw;
 323         reg = &ha->iobase->isp;
 324         cmd = GET_CMD_SP(sp);
 325         req = ha->req_q_map[0];
 326         rsp = ha->rsp_q_map[0];
 327         /* So we know we haven't pci_map'ed anything yet */
 328         tot_dsds = 0;
 329
 330         /* Send marker if required */
 331         if (vha->marker_needed != 0) {
 332                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
 333                     QLA_SUCCESS) {
 334                         return (QLA_FUNCTION_FAILED);
 335                 }
 336                 vha->marker_needed = 0;
 337         }
 338
 339         /* Acquire ring specific lock */
 340         spin_lock_irqsave(&ha->hardware_lock, flags);
 341
 342         /* Check for room in outstanding command list. */
 343         handle = req->current_outstanding_cmd;
 344         for (index = 1; index < req->num_outstanding_cmds; index++) {
 345                 handle++;
 346                 if (handle == req->num_outstanding_cmds)
 347                         handle = 1;
 348                 if (!req->outstanding_cmds[handle])
 349                         break;
 350         }
 351         if (index == req->num_outstanding_cmds)
 352                 goto queuing_error;
 353
 354         /* Map the sg table so we have an accurate count of sg entries needed */
 355         if (scsi_sg_count(cmd)) {
 356                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
 357                     scsi_sg_count(cmd), cmd->sc_data_direction);
 358                 if (unlikely(!nseg))
 359                         goto queuing_error;
 360         } else
 361                 nseg = 0;
 362
 363         tot_dsds = nseg;
 364
 365         /* Calculate the number of request entries needed. */
 366         req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
 367         if (req->cnt < (req_cnt + 2)) {
 368                 cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
 369                 if (req->ring_index < cnt)
 370                         req->cnt = cnt - req->ring_index;
 371                 else
 372                         req->cnt = req->length -
 373                             (req->ring_index - cnt);
 374                 /* If still no head room then bail out */
 375                 if (req->cnt < (req_cnt + 2))
 376                         goto queuing_error;
 377         }
 378
 379         /* Build command packet */
 380         req->current_outstanding_cmd = handle;
 381         req->outstanding_cmds[handle] = sp;
 382         sp->handle = handle;
 383         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
 384         req->cnt -= req_cnt;
 385
 386         cmd_pkt = (cmd_entry_t *)req->ring_ptr;
 387         cmd_pkt->handle = handle;
 388         /* Zero out remaining portion of packet. */
 389         clr_ptr = (uint32_t *)cmd_pkt + 2;
 390         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 391         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 392
 393         /* Set target ID and LUN number*/
 394         SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
 395         cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
 396         cmd_pkt->control_flags = cpu_to_le16(CF_SIMPLE_TAG);
 397
 398         /* Load SCSI command packet. */
 399         memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
 400         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 401
 402         /* Build IOCB segments */
 403         ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 404
 405         /* Set total data segment count. */
 406         cmd_pkt->entry_count = (uint8_t)req_cnt;
 407         wmb();
 408
 409         /* Adjust ring index. */
 410         req->ring_index++;
 411         if (req->ring_index == req->length) {
 412                 req->ring_index = 0;
 413                 req->ring_ptr = req->ring;
 414         } else
 415                 req->ring_ptr++;
 416
 417         sp->flags |= SRB_DMA_VALID;
 418
 419         /* Set chip new ring index. */
 420         WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index);
 421         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
 422
 423         /* Manage unprocessed RIO/ZIO commands in response queue. */
 424         if (vha->flags.process_response_queue &&
 425             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 426                 qla2x00_process_response_queue(rsp);
 427
 428         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 429         return (QLA_SUCCESS);
 430
 431 queuing_error:
 432         if (tot_dsds)
 433                 scsi_dma_unmap(cmd);
 434
 435         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 436
 437         return (QLA_FUNCTION_FAILED);
 438 }
 439
 440 /**
 441  * qla2x00_start_iocbs() - Execute the IOCB command
 442  * @vha: HA context
 443  * @req: request queue
 444  */
 445 void
 446 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 447 {
 448         struct qla_hw_data *ha = vha->hw;
 449         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
 450
 451         if (IS_P3P_TYPE(ha)) {
 452                 qla82xx_start_iocbs(vha);
 453         } else {
 454                 /* Adjust ring index. */
 455                 req->ring_index++;
 456                 if (req->ring_index == req->length) {
 457                         req->ring_index = 0;
 458                         req->ring_ptr = req->ring;
 459                 } else
 460                         req->ring_ptr++;
 461
 462                 /* Set chip new ring index. */
 463                 if (ha->mqenable || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
 464                         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 465                 } else if (IS_QLA83XX(ha)) {
 466                         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 467                         RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
 468                 } else if (IS_QLAFX00(ha)) {
 469                         WRT_REG_DWORD(&reg->ispfx00.req_q_in, req->ring_index);
 470                         RD_REG_DWORD_RELAXED(&reg->ispfx00.req_q_in);
 471                         QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
 472                 } else if (IS_FWI2_CAPABLE(ha)) {
 473                         WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
 474                         RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
 475                 } else {
 476                         WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
 477                                 req->ring_index);
 478                         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
 479                 }
 480         }
 481 }
 482
 483 /**
 484  * qla2x00_marker() - Send a marker IOCB to the firmware.
 485  * @vha: HA context
 486  * @qpair: queue pair pointer
 487  * @loop_id: loop ID
 488  * @lun: LUN
 489  * @type: marker modifier
 490  *
 491  * Can be called from both normal and interrupt context.
 492  *
 493  * Returns non-zero if a failure occurred, else zero.
 494  */
 495 static int
 496 __qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 497     uint16_t loop_id, uint64_t lun, uint8_t type)
 498 {
 499         mrk_entry_t *mrk;
 500         struct mrk_entry_24xx *mrk24 = NULL;
 501         struct req_que *req = qpair->req;
 502         struct qla_hw_data *ha = vha->hw;
 503         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 504
 505         mrk = (mrk_entry_t *)__qla2x00_alloc_iocbs(qpair, NULL);
 506         if (mrk == NULL) {
 507                 ql_log(ql_log_warn, base_vha, 0x3026,
 508                     "Failed to allocate Marker IOCB.\n");
 509
 510                 return (QLA_FUNCTION_FAILED);
 511         }
 512
 513         mrk->entry_type = MARKER_TYPE;
 514         mrk->modifier = type;
 515         if (type != MK_SYNC_ALL) {
 516                 if (IS_FWI2_CAPABLE(ha)) {
 517                         mrk24 = (struct mrk_entry_24xx *) mrk;
 518                         mrk24->nport_handle = cpu_to_le16(loop_id);
 519                         int_to_scsilun(lun, (struct scsi_lun *)&mrk24->lun);
 520                         host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
 521                         mrk24->vp_index = vha->vp_idx;
 522                         mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
 523                 } else {
 524                         SET_TARGET_ID(ha, mrk->target, loop_id);
 525                         mrk->lun = cpu_to_le16((uint16_t)lun);
 526                 }
 527         }
 528         wmb();
 529
 530         qla2x00_start_iocbs(vha, req);
 531
 532         return (QLA_SUCCESS);
 533 }
 534
 535 int
 536 qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 537     uint16_t loop_id, uint64_t lun, uint8_t type)
 538 {
 539         int ret;
 540         unsigned long flags = 0;
 541
 542         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
 543         ret = __qla2x00_marker(vha, qpair, loop_id, lun, type);
 544         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
 545
 546         return (ret);
 547 }
 548
 549 /*
 550  * qla2x00_issue_marker
 551  *
 552  * Issue marker
 553  * Caller CAN have hardware lock held as specified by ha_locked parameter.
 554  * Might release it, then reaquire.
 555  */
 556 int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 557 {
 558         if (ha_locked) {
 559                 if (__qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 560                                         MK_SYNC_ALL) != QLA_SUCCESS)
 561                         return QLA_FUNCTION_FAILED;
 562         } else {
 563                 if (qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 564                                         MK_SYNC_ALL) != QLA_SUCCESS)
 565                         return QLA_FUNCTION_FAILED;
 566         }
 567         vha->marker_needed = 0;
 568
 569         return QLA_SUCCESS;
 570 }
 571
 572 static inline int
 573 qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
 574         uint16_t tot_dsds)
 575 {
 576         struct dsd64 *cur_dsd = NULL, *next_dsd;
 577         scsi_qla_host_t *vha;
 578         struct qla_hw_data *ha;
 579         struct scsi_cmnd *cmd;
 580         struct  scatterlist *cur_seg;
 581         uint8_t avail_dsds;
 582         uint8_t first_iocb = 1;
 583         uint32_t dsd_list_len;
 584         struct dsd_dma *dsd_ptr;
 585         struct ct6_dsd *ctx;
 586
 587         cmd = GET_CMD_SP(sp);
 588
 589         /* Update entry type to indicate Command Type 3 IOCB */
 590         put_unaligned_le32(COMMAND_TYPE_6, &cmd_pkt->entry_type);
 591
 592         /* No data transfer */
 593         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 594                 cmd_pkt->byte_count = cpu_to_le32(0);
 595                 return 0;
 596         }
 597
 598         vha = sp->vha;
 599         ha = vha->hw;
 600
 601         /* Set transfer direction */
 602         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 603                 cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
 604                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 605                 vha->qla_stats.output_requests++;
 606         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 607                 cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
 608                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 609                 vha->qla_stats.input_requests++;
 610         }
 611
 612         cur_seg = scsi_sglist(cmd);
 613         ctx = GET_CMD_CTX_SP(sp);
 614
 615         while (tot_dsds) {
 616                 avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
 617                     QLA_DSDS_PER_IOCB : tot_dsds;
 618                 tot_dsds -= avail_dsds;
 619                 dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
 620
 621                 dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
 622                     struct dsd_dma, list);
 623                 next_dsd = dsd_ptr->dsd_addr;
 624                 list_del(&dsd_ptr->list);
 625                 ha->gbl_dsd_avail--;
 626                 list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
 627                 ctx->dsd_use_cnt++;
 628                 ha->gbl_dsd_inuse++;
 629
 630                 if (first_iocb) {
 631                         first_iocb = 0;
 632                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 633                                            &cmd_pkt->fcp_dsd.address);
 634                         cmd_pkt->fcp_dsd.length = cpu_to_le32(dsd_list_len);
 635                 } else {
 636                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 637                                            &cur_dsd->address);
 638                         cur_dsd->length = cpu_to_le32(dsd_list_len);
 639                         cur_dsd++;
 640                 }
 641                 cur_dsd = next_dsd;
 642                 while (avail_dsds) {
 643                         append_dsd64(&cur_dsd, cur_seg);
 644                         cur_seg = sg_next(cur_seg);
 645                         avail_dsds--;
 646                 }
 647         }
 648
 649         /* Null termination */
 650         cur_dsd->address = 0;
 651         cur_dsd->length = 0;
 652         cur_dsd++;
 653         cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
 654         return 0;
 655 }
 656
 657 /*
 658  * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 659  * for Command Type 6.
 660  *
 661  * @dsds: number of data segment decriptors needed
 662  *
 663  * Returns the number of dsd list needed to store @dsds.
 664  */
 665 static inline uint16_t
 666 qla24xx_calc_dsd_lists(uint16_t dsds)
 667 {
 668         uint16_t dsd_lists = 0;
 669
 670         dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
 671         if (dsds % QLA_DSDS_PER_IOCB)
 672                 dsd_lists++;
 673         return dsd_lists;
 674 }
 675
 676
 677 /**
 678  * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 679  * IOCB types.
 680  *
 681  * @sp: SRB command to process
 682  * @cmd_pkt: Command type 3 IOCB
 683  * @tot_dsds: Total number of segments to transfer
 684  * @req: pointer to request queue
 685  */
 686 inline void
 687 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 688         uint16_t tot_dsds, struct req_que *req)
 689 {
 690         uint16_t        avail_dsds;
 691         struct dsd64    *cur_dsd;
 692         scsi_qla_host_t *vha;
 693         struct scsi_cmnd *cmd;
 694         struct scatterlist *sg;
 695         int i;
 696
 697         cmd = GET_CMD_SP(sp);
 698
 699         /* Update entry type to indicate Command Type 3 IOCB */
 700         put_unaligned_le32(COMMAND_TYPE_7, &cmd_pkt->entry_type);
 701
 702         /* No data transfer */
 703         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 704                 cmd_pkt->byte_count = cpu_to_le32(0);
 705                 return;
 706         }
 707
 708         vha = sp->vha;
 709
 710         /* Set transfer direction */
 711         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 712                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_WRITE_DATA);
 713                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 714                 vha->qla_stats.output_requests++;
 715         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 716                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_READ_DATA);
 717                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 718                 vha->qla_stats.input_requests++;
 719         }
 720
 721         /* One DSD is available in the Command Type 3 IOCB */
 722         avail_dsds = 1;
 723         cur_dsd = &cmd_pkt->dsd;
 724
 725         /* Load data segments */
 726
 727         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 728                 cont_a64_entry_t *cont_pkt;
 729
 730                 /* Allocate additional continuation packets? */
 731                 if (avail_dsds == 0) {
 732                         /*
 733                          * Five DSDs are available in the Continuation
 734                          * Type 1 IOCB.
 735                          */
 736                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
 737                         cur_dsd = cont_pkt->dsd;
 738                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 739                 }
 740
 741                 append_dsd64(&cur_dsd, sg);
 742                 avail_dsds--;
 743         }
 744 }
 745
 746 struct fw_dif_context {
 747         uint32_t ref_tag;
 748         uint16_t app_tag;
 749         uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
 750         uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
 751 };
 752
 753 /*
 754  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 755  *
 756  */
 757 static inline void
 758 qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 759     unsigned int protcnt)
 760 {
 761         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 762
 763         switch (scsi_get_prot_type(cmd)) {
 764         case SCSI_PROT_DIF_TYPE0:
 765                 /*
 766                  * No check for ql2xenablehba_err_chk, as it would be an
 767                  * I/O error if hba tag generation is not done.
 768                  */
 769                 pkt->ref_tag = cpu_to_le32((uint32_t)
 770                     (0xffffffff & scsi_get_lba(cmd)));
 771
 772                 if (!qla2x00_hba_err_chk_enabled(sp))
 773                         break;
 774
 775                 pkt->ref_tag_mask[0] = 0xff;
 776                 pkt->ref_tag_mask[1] = 0xff;
 777                 pkt->ref_tag_mask[2] = 0xff;
 778                 pkt->ref_tag_mask[3] = 0xff;
 779                 break;
 780
 781         /*
 782          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
 783          * match LBA in CDB + N
 784          */
 785         case SCSI_PROT_DIF_TYPE2:
 786                 pkt->app_tag = cpu_to_le16(0);
 787                 pkt->app_tag_mask[0] = 0x0;
 788                 pkt->app_tag_mask[1] = 0x0;
 789
 790                 pkt->ref_tag = cpu_to_le32((uint32_t)
 791                     (0xffffffff & scsi_get_lba(cmd)));
 792
 793                 if (!qla2x00_hba_err_chk_enabled(sp))
 794                         break;
 795
 796                 /* enable ALL bytes of the ref tag */
 797                 pkt->ref_tag_mask[0] = 0xff;
 798                 pkt->ref_tag_mask[1] = 0xff;
 799                 pkt->ref_tag_mask[2] = 0xff;
 800                 pkt->ref_tag_mask[3] = 0xff;
 801                 break;
 802
 803         /* For Type 3 protection: 16 bit GUARD only */
 804         case SCSI_PROT_DIF_TYPE3:
 805                 pkt->ref_tag_mask[0] = pkt->ref_tag_mask[1] =
 806                         pkt->ref_tag_mask[2] = pkt->ref_tag_mask[3] =
 807                                                                 0x00;
 808                 break;
 809
 810         /*
 811          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
 812          * 16 bit app tag.
 813          */
 814         case SCSI_PROT_DIF_TYPE1:
 815                 pkt->ref_tag = cpu_to_le32((uint32_t)
 816                     (0xffffffff & scsi_get_lba(cmd)));
 817                 pkt->app_tag = cpu_to_le16(0);
 818                 pkt->app_tag_mask[0] = 0x0;
 819                 pkt->app_tag_mask[1] = 0x0;
 820
 821                 if (!qla2x00_hba_err_chk_enabled(sp))
 822                         break;
 823
 824                 /* enable ALL bytes of the ref tag */
 825                 pkt->ref_tag_mask[0] = 0xff;
 826                 pkt->ref_tag_mask[1] = 0xff;
 827                 pkt->ref_tag_mask[2] = 0xff;
 828                 pkt->ref_tag_mask[3] = 0xff;
 829                 break;
 830         }
 831 }
 832
 833 int
 834 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 835         uint32_t *partial)
 836 {
 837         struct scatterlist *sg;
 838         uint32_t cumulative_partial, sg_len;
 839         dma_addr_t sg_dma_addr;
 840
 841         if (sgx->num_bytes == sgx->tot_bytes)
 842                 return 0;
 843
 844         sg = sgx->cur_sg;
 845         cumulative_partial = sgx->tot_partial;
 846
 847         sg_dma_addr = sg_dma_address(sg);
 848         sg_len = sg_dma_len(sg);
 849
 850         sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 851
 852         if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
 853                 sgx->dma_len = (blk_sz - cumulative_partial);
 854                 sgx->tot_partial = 0;
 855                 sgx->num_bytes += blk_sz;
 856                 *partial = 0;
 857         } else {
 858                 sgx->dma_len = sg_len - sgx->bytes_consumed;
 859                 sgx->tot_partial += sgx->dma_len;
 860                 *partial = 1;
 861         }
 862
 863         sgx->bytes_consumed += sgx->dma_len;
 864
 865         if (sg_len == sgx->bytes_consumed) {
 866                 sg = sg_next(sg);
 867                 sgx->num_sg++;
 868                 sgx->cur_sg = sg;
 869                 sgx->bytes_consumed = 0;
 870         }
 871
 872         return 1;
 873 }
 874
 875 int
 876 qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
 877         struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 878 {
 879         void *next_dsd;
 880         uint8_t avail_dsds = 0;
 881         uint32_t dsd_list_len;
 882         struct dsd_dma *dsd_ptr;
 883         struct scatterlist *sg_prot;
 884         struct dsd64 *cur_dsd = dsd;
 885         uint16_t        used_dsds = tot_dsds;
 886         uint32_t        prot_int; /* protection interval */
 887         uint32_t        partial;
 888         struct qla2_sgx sgx;
 889         dma_addr_t      sle_dma;
 890         uint32_t        sle_dma_len, tot_prot_dma_len = 0;
 891         struct scsi_cmnd *cmd;
 892
 893         memset(&sgx, 0, sizeof(struct qla2_sgx));
 894         if (sp) {
 895                 cmd = GET_CMD_SP(sp);
 896                 prot_int = cmd->device->sector_size;
 897
 898                 sgx.tot_bytes = scsi_bufflen(cmd);
 899                 sgx.cur_sg = scsi_sglist(cmd);
 900                 sgx.sp = sp;
 901
 902                 sg_prot = scsi_prot_sglist(cmd);
 903         } else if (tc) {
 904                 prot_int      = tc->blk_sz;
 905                 sgx.tot_bytes = tc->bufflen;
 906                 sgx.cur_sg    = tc->sg;
 907                 sg_prot       = tc->prot_sg;
 908         } else {
 909                 BUG();
 910                 return 1;
 911         }
 912
 913         while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 914
 915                 sle_dma = sgx.dma_addr;
 916                 sle_dma_len = sgx.dma_len;
 917 alloc_and_fill:
 918                 /* Allocate additional continuation packets? */
 919                 if (avail_dsds == 0) {
 920                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 921                                         QLA_DSDS_PER_IOCB : used_dsds;
 922                         dsd_list_len = (avail_dsds + 1) * 12;
 923                         used_dsds -= avail_dsds;
 924
 925                         /* allocate tracking DS */
 926                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 927                         if (!dsd_ptr)
 928                                 return 1;
 929
 930                         /* allocate new list */
 931                         dsd_ptr->dsd_addr = next_dsd =
 932                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 933                                 &dsd_ptr->dsd_list_dma);
 934
 935                         if (!next_dsd) {
 936                                 /*
 937                                  * Need to cleanup only this dsd_ptr, rest
 938                                  * will be done by sp_free_dma()
 939                                  */
 940                                 kfree(dsd_ptr);
 941                                 return 1;
 942                         }
 943
 944                         if (sp) {
 945                                 list_add_tail(&dsd_ptr->list,
 946                                     &((struct crc_context *)
 947                                             sp->u.scmd.ctx)->dsd_list);
 948
 949                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
 950                         } else {
 951                                 list_add_tail(&dsd_ptr->list,
 952                                     &(tc->ctx->dsd_list));
 953                                 *tc->ctx_dsd_alloced = 1;
 954                         }
 955
 956
 957                         /* add new list to cmd iocb or last list */
 958                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 959                                            &cur_dsd->address);
 960                         cur_dsd->length = cpu_to_le32(dsd_list_len);
 961                         cur_dsd = next_dsd;
 962                 }
 963                 put_unaligned_le64(sle_dma, &cur_dsd->address);
 964                 cur_dsd->length = cpu_to_le32(sle_dma_len);
 965                 cur_dsd++;
 966                 avail_dsds--;
 967
 968                 if (partial == 0) {
 969                         /* Got a full protection interval */
 970                         sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
 971                         sle_dma_len = 8;
 972
 973                         tot_prot_dma_len += sle_dma_len;
 974                         if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
 975                                 tot_prot_dma_len = 0;
 976                                 sg_prot = sg_next(sg_prot);
 977                         }
 978
 979                         partial = 1; /* So as to not re-enter this block */
 980                         goto alloc_and_fill;
 981                 }
 982         }
 983         /* Null termination */
 984         cur_dsd->address = 0;
 985         cur_dsd->length = 0;
 986         cur_dsd++;
 987         return 0;
 988 }
 989
 990 int
 991 qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp,
 992         struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 993 {
 994         void *next_dsd;
 995         uint8_t avail_dsds = 0;
 996         uint32_t dsd_list_len;
 997         struct dsd_dma *dsd_ptr;
 998         struct scatterlist *sg, *sgl;
 999         struct dsd64 *cur_dsd = dsd;
1000         int     i;
1001         uint16_t        used_dsds = tot_dsds;
1002         struct scsi_cmnd *cmd;
1003
1004         if (sp) {
1005                 cmd = GET_CMD_SP(sp);
1006                 sgl = scsi_sglist(cmd);
1007         } else if (tc) {
1008                 sgl = tc->sg;
1009         } else {
1010                 BUG();
1011                 return 1;
1012         }
1013
1014
1015         for_each_sg(sgl, sg, tot_dsds, i) {
1016                 /* Allocate additional continuation packets? */
1017                 if (avail_dsds == 0) {
1018                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1019                                         QLA_DSDS_PER_IOCB : used_dsds;
1020                         dsd_list_len = (avail_dsds + 1) * 12;
1021                         used_dsds -= avail_dsds;
1022
1023                         /* allocate tracking DS */
1024                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
1025                         if (!dsd_ptr)
1026                                 return 1;
1027
1028                         /* allocate new list */
1029                         dsd_ptr->dsd_addr = next_dsd =
1030                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1031                                 &dsd_ptr->dsd_list_dma);
1032
1033                         if (!next_dsd) {
1034                                 /*
1035                                  * Need to cleanup only this dsd_ptr, rest
1036                                  * will be done by sp_free_dma()
1037                                  */
1038                                 kfree(dsd_ptr);
1039                                 return 1;
1040                         }
1041
1042                         if (sp) {
1043                                 list_add_tail(&dsd_ptr->list,
1044                                     &((struct crc_context *)
1045                                             sp->u.scmd.ctx)->dsd_list);
1046
1047                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
1048                         } else {
1049                                 list_add_tail(&dsd_ptr->list,
1050                                     &(tc->ctx->dsd_list));
1051                                 *tc->ctx_dsd_alloced = 1;
1052                         }
1053
1054                         /* add new list to cmd iocb or last list */
1055                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
1056                                            &cur_dsd->address);
1057                         cur_dsd->length = cpu_to_le32(dsd_list_len);
1058                         cur_dsd = next_dsd;
1059                 }
1060                 append_dsd64(&cur_dsd, sg);
1061                 avail_dsds--;
1062
1063         }
1064         /* Null termination */
1065         cur_dsd->address = 0;
1066         cur_dsd->length = 0;
1067         cur_dsd++;
1068         return 0;
1069 }
1070
1071 int
1072 qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
1073         struct dsd64 *cur_dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1074 {
1075         struct dsd_dma *dsd_ptr = NULL, *dif_dsd, *nxt_dsd;
1076         struct scatterlist *sg, *sgl;
1077         struct crc_context *difctx = NULL;
1078         struct scsi_qla_host *vha;
1079         uint dsd_list_len;
1080         uint avail_dsds = 0;
1081         uint used_dsds = tot_dsds;
1082         bool dif_local_dma_alloc = false;
1083         bool direction_to_device = false;
1084         int i;
1085
1086         if (sp) {
1087                 struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1088
1089                 sgl = scsi_prot_sglist(cmd);
1090                 vha = sp->vha;
1091                 difctx = sp->u.scmd.ctx;
1092                 direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
1093                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1094                   "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
1095                         __func__, cmd, difctx, sp);
1096         } else if (tc) {
1097                 vha = tc->vha;
1098                 sgl = tc->prot_sg;
1099                 difctx = tc->ctx;
1100                 direction_to_device = tc->dma_data_direction == DMA_TO_DEVICE;
1101         } else {
1102                 BUG();
1103                 return 1;
1104         }
1105
1106         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1107             "%s: enter (write=%u)\n", __func__, direction_to_device);
1108
1109         /* if initiator doing write or target doing read */
1110         if (direction_to_device) {
1111                 for_each_sg(sgl, sg, tot_dsds, i) {
1112                         u64 sle_phys = sg_phys(sg);
1113
1114                         /* If SGE addr + len flips bits in upper 32-bits */
1115                         if (MSD(sle_phys + sg->length) ^ MSD(sle_phys)) {
1116                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe022,
1117                                     "%s: page boundary crossing (phys=%llx len=%x)\n",
1118                                     __func__, sle_phys, sg->length);
1119
1120                                 if (difctx) {
1121                                         ha->dif_bundle_crossed_pages++;
1122                                         dif_local_dma_alloc = true;
1123                                 } else {
1124                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1125                                             vha, 0xe022,
1126                                             "%s: difctx pointer is NULL\n",
1127                                             __func__);
1128                                 }
1129                                 break;
1130                         }
1131                 }
1132                 ha->dif_bundle_writes++;
1133         } else {
1134                 ha->dif_bundle_reads++;
1135         }
1136
1137         if (ql2xdifbundlinginternalbuffers)
1138                 dif_local_dma_alloc = direction_to_device;
1139
1140         if (dif_local_dma_alloc) {
1141                 u32 track_difbundl_buf = 0;
1142                 u32 ldma_sg_len = 0;
1143                 u8 ldma_needed = 1;
1144
1145                 difctx->no_dif_bundl = 0;
1146                 difctx->dif_bundl_len = 0;
1147
1148                 /* Track DSD buffers */
1149                 INIT_LIST_HEAD(&difctx->ldif_dsd_list);
1150                 /* Track local DMA buffers */
1151                 INIT_LIST_HEAD(&difctx->ldif_dma_hndl_list);
1152
1153                 for_each_sg(sgl, sg, tot_dsds, i) {
1154                         u32 sglen = sg_dma_len(sg);
1155
1156                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe023,
1157                             "%s: sg[%x] (phys=%llx sglen=%x) ldma_sg_len: %x dif_bundl_len: %x ldma_needed: %x\n",
1158                             __func__, i, (u64)sg_phys(sg), sglen, ldma_sg_len,
1159                             difctx->dif_bundl_len, ldma_needed);
1160
1161                         while (sglen) {
1162                                 u32 xfrlen = 0;
1163
1164                                 if (ldma_needed) {
1165                                         /*
1166                                          * Allocate list item to store
1167                                          * the DMA buffers
1168                                          */
1169                                         dsd_ptr = kzalloc(sizeof(*dsd_ptr),
1170                                             GFP_ATOMIC);
1171                                         if (!dsd_ptr) {
1172                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1173                                                     "%s: failed alloc dsd_ptr\n",
1174                                                     __func__);
1175                                                 return 1;
1176                                         }
1177                                         ha->dif_bundle_kallocs++;
1178
1179                                         /* allocate dma buffer */
1180                                         dsd_ptr->dsd_addr = dma_pool_alloc
1181                                                 (ha->dif_bundl_pool, GFP_ATOMIC,
1182                                                  &dsd_ptr->dsd_list_dma);
1183                                         if (!dsd_ptr->dsd_addr) {
1184                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1185                                                     "%s: failed alloc ->dsd_ptr\n",
1186                                                     __func__);
1187                                                 /*
1188                                                  * need to cleanup only this
1189                                                  * dsd_ptr rest will be done
1190                                                  * by sp_free_dma()
1191                                                  */
1192                                                 kfree(dsd_ptr);
1193                                                 ha->dif_bundle_kallocs--;
1194                                                 return 1;
1195                                         }
1196                                         ha->dif_bundle_dma_allocs++;
1197                                         ldma_needed = 0;
1198                                         difctx->no_dif_bundl++;
1199                                         list_add_tail(&dsd_ptr->list,
1200                                             &difctx->ldif_dma_hndl_list);
1201                                 }
1202
1203                                 /* xfrlen is min of dma pool size and sglen */
1204                                 xfrlen = (sglen >
1205                                    (DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len)) ?
1206                                     DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len :
1207                                     sglen;
1208
1209                                 /* replace with local allocated dma buffer */
1210                                 sg_pcopy_to_buffer(sgl, sg_nents(sgl),
1211                                     dsd_ptr->dsd_addr + ldma_sg_len, xfrlen,
1212                                     difctx->dif_bundl_len);
1213                                 difctx->dif_bundl_len += xfrlen;
1214                                 sglen -= xfrlen;
1215                                 ldma_sg_len += xfrlen;
1216                                 if (ldma_sg_len == DIF_BUNDLING_DMA_POOL_SIZE ||
1217                                     sg_is_last(sg)) {
1218                                         ldma_needed = 1;
1219                                         ldma_sg_len = 0;
1220                                 }
1221                         }
1222                 }
1223
1224                 track_difbundl_buf = used_dsds = difctx->no_dif_bundl;
1225                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe025,
1226                     "dif_bundl_len=%x, no_dif_bundl=%x track_difbundl_buf: %x\n",
1227                     difctx->dif_bundl_len, difctx->no_dif_bundl,
1228                     track_difbundl_buf);
1229
1230                 if (sp)
1231                         sp->flags |= SRB_DIF_BUNDL_DMA_VALID;
1232                 else
1233                         tc->prot_flags = DIF_BUNDL_DMA_VALID;
1234
1235                 list_for_each_entry_safe(dif_dsd, nxt_dsd,
1236                     &difctx->ldif_dma_hndl_list, list) {
1237                         u32 sglen = (difctx->dif_bundl_len >
1238                             DIF_BUNDLING_DMA_POOL_SIZE) ?
1239                             DIF_BUNDLING_DMA_POOL_SIZE : difctx->dif_bundl_len;
1240
1241                         BUG_ON(track_difbundl_buf == 0);
1242
1243                         /* Allocate additional continuation packets? */
1244                         if (avail_dsds == 0) {
1245                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha,
1246                                     0xe024,
1247                                     "%s: adding continuation iocb's\n",
1248                                     __func__);
1249                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1250                                     QLA_DSDS_PER_IOCB : used_dsds;
1251                                 dsd_list_len = (avail_dsds + 1) * 12;
1252                                 used_dsds -= avail_dsds;
1253
1254                                 /* allocate tracking DS */
1255                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1256                                 if (!dsd_ptr) {
1257                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1258                                             "%s: failed alloc dsd_ptr\n",
1259                                             __func__);
1260                                         return 1;
1261                                 }
1262                                 ha->dif_bundle_kallocs++;
1263
1264                                 difctx->no_ldif_dsd++;
1265                                 /* allocate new list */
1266                                 dsd_ptr->dsd_addr =
1267                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1268                                         &dsd_ptr->dsd_list_dma);
1269                                 if (!dsd_ptr->dsd_addr) {
1270                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1271                                             "%s: failed alloc ->dsd_addr\n",
1272                                             __func__);
1273                                         /*
1274                                          * need to cleanup only this dsd_ptr
1275                                          *  rest will be done by sp_free_dma()
1276                                          */
1277                                         kfree(dsd_ptr);
1278                                         ha->dif_bundle_kallocs--;
1279                                         return 1;
1280                                 }
1281                                 ha->dif_bundle_dma_allocs++;
1282
1283                                 if (sp) {
1284                                         list_add_tail(&dsd_ptr->list,
1285                                             &difctx->ldif_dsd_list);
1286                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1287                                 } else {
1288                                         list_add_tail(&dsd_ptr->list,
1289                                             &difctx->ldif_dsd_list);
1290                                         tc->ctx_dsd_alloced = 1;
1291                                 }
1292
1293                                 /* add new list to cmd iocb or last list */
1294                                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
1295                                                    &cur_dsd->address);
1296                                 cur_dsd->length = cpu_to_le32(dsd_list_len);
1297                                 cur_dsd = dsd_ptr->dsd_addr;
1298                         }
1299                         put_unaligned_le64(dif_dsd->dsd_list_dma,
1300                                            &cur_dsd->address);
1301                         cur_dsd->length = cpu_to_le32(sglen);
1302                         cur_dsd++;
1303                         avail_dsds--;
1304                         difctx->dif_bundl_len -= sglen;
1305                         track_difbundl_buf--;
1306                 }
1307
1308                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe026,
1309                     "%s: no_ldif_dsd:%x, no_dif_bundl:%x\n", __func__,
1310                         difctx->no_ldif_dsd, difctx->no_dif_bundl);
1311         } else {
1312                 for_each_sg(sgl, sg, tot_dsds, i) {
1313                         /* Allocate additional continuation packets? */
1314                         if (avail_dsds == 0) {
1315                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1316                                     QLA_DSDS_PER_IOCB : used_dsds;
1317                                 dsd_list_len = (avail_dsds + 1) * 12;
1318                                 used_dsds -= avail_dsds;
1319
1320                                 /* allocate tracking DS */
1321                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1322                                 if (!dsd_ptr) {
1323                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1324                                             vha, 0xe027,
1325                                             "%s: failed alloc dsd_dma...\n",
1326                                             __func__);
1327                                         return 1;
1328                                 }
1329
1330                                 /* allocate new list */
1331                                 dsd_ptr->dsd_addr =
1332                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1333                                         &dsd_ptr->dsd_list_dma);
1334                                 if (!dsd_ptr->dsd_addr) {
1335                                         /* need to cleanup only this dsd_ptr */
1336                                         /* rest will be done by sp_free_dma() */
1337                                         kfree(dsd_ptr);
1338                                         return 1;
1339                                 }
1340
1341                                 if (sp) {
1342                                         list_add_tail(&dsd_ptr->list,
1343                                             &difctx->dsd_list);
1344                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1345                                 } else {
1346                                         list_add_tail(&dsd_ptr->list,
1347                                             &difctx->dsd_list);
1348                                         tc->ctx_dsd_alloced = 1;
1349                                 }
1350
1351                                 /* add new list to cmd iocb or last list */
1352                                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
1353                                                    &cur_dsd->address);
1354                                 cur_dsd->length = cpu_to_le32(dsd_list_len);
1355                                 cur_dsd = dsd_ptr->dsd_addr;
1356                         }
1357                         append_dsd64(&cur_dsd, sg);
1358                         avail_dsds--;
1359                 }
1360         }
1361         /* Null termination */
1362         cur_dsd->address = 0;
1363         cur_dsd->length = 0;
1364         cur_dsd++;
1365         return 0;
1366 }
1367
1368 /**
1369  * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
1370  *                                                      Type 6 IOCB types.
1371  *
1372  * @sp: SRB command to process
1373  * @cmd_pkt: Command type 3 IOCB
1374  * @tot_dsds: Total number of segments to transfer
1375  * @tot_prot_dsds: Total number of segments with protection information
1376  * @fw_prot_opts: Protection options to be passed to firmware
1377  */
1378 static inline int
1379 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
1380     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
1381 {
1382         struct dsd64            *cur_dsd;
1383         uint32_t                *fcp_dl;
1384         scsi_qla_host_t         *vha;
1385         struct scsi_cmnd        *cmd;
1386         uint32_t                total_bytes = 0;
1387         uint32_t                data_bytes;
1388         uint32_t                dif_bytes;
1389         uint8_t                 bundling = 1;
1390         uint16_t                blk_size;
1391         struct crc_context      *crc_ctx_pkt = NULL;
1392         struct qla_hw_data      *ha;
1393         uint8_t                 additional_fcpcdb_len;
1394         uint16_t                fcp_cmnd_len;
1395         struct fcp_cmnd         *fcp_cmnd;
1396         dma_addr_t              crc_ctx_dma;
1397
1398         cmd = GET_CMD_SP(sp);
1399
1400         /* Update entry type to indicate Command Type CRC_2 IOCB */
1401         put_unaligned_le32(COMMAND_TYPE_CRC_2, &cmd_pkt->entry_type);
1402
1403         vha = sp->vha;
1404         ha = vha->hw;
1405
1406         /* No data transfer */
1407         data_bytes = scsi_bufflen(cmd);
1408         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1409                 cmd_pkt->byte_count = cpu_to_le32(0);
1410                 return QLA_SUCCESS;
1411         }
1412
1413         cmd_pkt->vp_index = sp->vha->vp_idx;
1414
1415         /* Set transfer direction */
1416         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1417                 cmd_pkt->control_flags =
1418                     cpu_to_le16(CF_WRITE_DATA);
1419         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
1420                 cmd_pkt->control_flags =
1421                     cpu_to_le16(CF_READ_DATA);
1422         }
1423
1424         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1425             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
1426             (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
1427             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1428                 bundling = 0;
1429
1430         /* Allocate CRC context from global pool */
1431         crc_ctx_pkt = sp->u.scmd.ctx =
1432             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1433
1434         if (!crc_ctx_pkt)
1435                 goto crc_queuing_error;
1436
1437         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
1438
1439         sp->flags |= SRB_CRC_CTX_DMA_VALID;
1440
1441         /* Set handle */
1442         crc_ctx_pkt->handle = cmd_pkt->handle;
1443
1444         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
1445
1446         qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1447             &crc_ctx_pkt->ref_tag, tot_prot_dsds);
1448
1449         put_unaligned_le64(crc_ctx_dma, &cmd_pkt->crc_context_address);
1450         cmd_pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
1451
1452         /* Determine SCSI command length -- align to 4 byte boundary */
1453         if (cmd->cmd_len > 16) {
1454                 additional_fcpcdb_len = cmd->cmd_len - 16;
1455                 if ((cmd->cmd_len % 4) != 0) {
1456                         /* SCSI cmd > 16 bytes must be multiple of 4 */
1457                         goto crc_queuing_error;
1458                 }
1459                 fcp_cmnd_len = 12 + cmd->cmd_len + 4;
1460         } else {
1461                 additional_fcpcdb_len = 0;
1462                 fcp_cmnd_len = 12 + 16 + 4;
1463         }
1464
1465         fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
1466
1467         fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
1468         if (cmd->sc_data_direction == DMA_TO_DEVICE)
1469                 fcp_cmnd->additional_cdb_len |= 1;
1470         else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1471                 fcp_cmnd->additional_cdb_len |= 2;
1472
1473         int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1474         memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
1475         cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
1476         put_unaligned_le64(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF,
1477                            &cmd_pkt->fcp_cmnd_dseg_address);
1478         fcp_cmnd->task_management = 0;
1479         fcp_cmnd->task_attribute = TSK_SIMPLE;
1480
1481         cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
1482
1483         /* Compute dif len and adjust data len to incude protection */
1484         dif_bytes = 0;
1485         blk_size = cmd->device->sector_size;
1486         dif_bytes = (data_bytes / blk_size) * 8;
1487
1488         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1489         case SCSI_PROT_READ_INSERT:
1490         case SCSI_PROT_WRITE_STRIP:
1491                 total_bytes = data_bytes;
1492                 data_bytes += dif_bytes;
1493                 break;
1494
1495         case SCSI_PROT_READ_STRIP:
1496         case SCSI_PROT_WRITE_INSERT:
1497         case SCSI_PROT_READ_PASS:
1498         case SCSI_PROT_WRITE_PASS:
1499                 total_bytes = data_bytes + dif_bytes;
1500                 break;
1501         default:
1502                 BUG();
1503         }
1504
1505         if (!qla2x00_hba_err_chk_enabled(sp))
1506                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1507         /* HBA error checking enabled */
1508         else if (IS_PI_UNINIT_CAPABLE(ha)) {
1509                 if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
1510                     || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1511                         SCSI_PROT_DIF_TYPE2))
1512                         fw_prot_opts |= BIT_10;
1513                 else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1514                     SCSI_PROT_DIF_TYPE3)
1515                         fw_prot_opts |= BIT_11;
1516         }
1517
1518         if (!bundling) {
1519                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
1520         } else {
1521                 /*
1522                  * Configure Bundling if we need to fetch interlaving
1523                  * protection PCI accesses
1524                  */
1525                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
1526                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
1527                 crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
1528                                                         tot_prot_dsds);
1529                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
1530         }
1531
1532         /* Finish the common fields of CRC pkt */
1533         crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
1534         crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
1535         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
1536         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
1537         /* Fibre channel byte count */
1538         cmd_pkt->byte_count = cpu_to_le32(total_bytes);
1539         fcp_dl = (uint32_t *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
1540             additional_fcpcdb_len);
1541         *fcp_dl = htonl(total_bytes);
1542
1543         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1544                 cmd_pkt->byte_count = cpu_to_le32(0);
1545                 return QLA_SUCCESS;
1546         }
1547         /* Walks data segments */
1548
1549         cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1550
1551         if (!bundling && tot_prot_dsds) {
1552                 if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
1553                         cur_dsd, tot_dsds, NULL))
1554                         goto crc_queuing_error;
1555         } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1556                         (tot_dsds - tot_prot_dsds), NULL))
1557                 goto crc_queuing_error;
1558
1559         if (bundling && tot_prot_dsds) {
1560                 /* Walks dif segments */
1561                 cmd_pkt->control_flags |= cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
1562                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
1563                 if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
1564                                 tot_prot_dsds, NULL))
1565                         goto crc_queuing_error;
1566         }
1567         return QLA_SUCCESS;
1568
1569 crc_queuing_error:
1570         /* Cleanup will be performed by the caller */
1571
1572         return QLA_FUNCTION_FAILED;
1573 }
1574
1575 /**
1576  * qla24xx_start_scsi() - Send a SCSI command to the ISP
1577  * @sp: command to send to the ISP
1578  *
1579  * Returns non-zero if a failure occurred, else zero.
1580  */
1581 int
1582 qla24xx_start_scsi(srb_t *sp)
1583 {
1584         int             nseg;
1585         unsigned long   flags;
1586         uint32_t        *clr_ptr;
1587         uint32_t        index;
1588         uint32_t        handle;
1589         struct cmd_type_7 *cmd_pkt;
1590         uint16_t        cnt;
1591         uint16_t        req_cnt;
1592         uint16_t        tot_dsds;
1593         struct req_que *req = NULL;
1594         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1595         struct scsi_qla_host *vha = sp->vha;
1596         struct qla_hw_data *ha = vha->hw;
1597
1598         /* Setup device pointers. */
1599         req = vha->req;
1600
1601         /* So we know we haven't pci_map'ed anything yet */
1602         tot_dsds = 0;
1603
1604         /* Send marker if required */
1605         if (vha->marker_needed != 0) {
1606                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1607                     QLA_SUCCESS)
1608                         return QLA_FUNCTION_FAILED;
1609                 vha->marker_needed = 0;
1610         }
1611
1612         /* Acquire ring specific lock */
1613         spin_lock_irqsave(&ha->hardware_lock, flags);
1614
1615         /* Check for room in outstanding command list. */
1616         handle = req->current_outstanding_cmd;
1617         for (index = 1; index < req->num_outstanding_cmds; index++) {
1618                 handle++;
1619                 if (handle == req->num_outstanding_cmds)
1620                         handle = 1;
1621                 if (!req->outstanding_cmds[handle])
1622                         break;
1623         }
1624         if (index == req->num_outstanding_cmds)
1625                 goto queuing_error;
1626
1627         /* Map the sg table so we have an accurate count of sg entries needed */
1628         if (scsi_sg_count(cmd)) {
1629                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1630                     scsi_sg_count(cmd), cmd->sc_data_direction);
1631                 if (unlikely(!nseg))
1632                         goto queuing_error;
1633         } else
1634                 nseg = 0;
1635
1636         tot_dsds = nseg;
1637         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1638         if (req->cnt < (req_cnt + 2)) {
1639                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1640                     RD_REG_DWORD_RELAXED(req->req_q_out);
1641                 if (req->ring_index < cnt)
1642                         req->cnt = cnt - req->ring_index;
1643                 else
1644                         req->cnt = req->length -
1645                                 (req->ring_index - cnt);
1646                 if (req->cnt < (req_cnt + 2))
1647                         goto queuing_error;
1648         }
1649
1650         /* Build command packet. */
1651         req->current_outstanding_cmd = handle;
1652         req->outstanding_cmds[handle] = sp;
1653         sp->handle = handle;
1654         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1655         req->cnt -= req_cnt;
1656
1657         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1658         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1659
1660         /* Zero out remaining portion of packet. */
1661         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1662         clr_ptr = (uint32_t *)cmd_pkt + 2;
1663         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1664         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1665
1666         /* Set NPORT-ID and LUN number*/
1667         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1668         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1669         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1670         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1671         cmd_pkt->vp_index = sp->vha->vp_idx;
1672
1673         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1674         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1675
1676         cmd_pkt->task = TSK_SIMPLE;
1677
1678         /* Load SCSI command packet. */
1679         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1680         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1681
1682         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1683
1684         /* Build IOCB segments */
1685         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
1686
1687         /* Set total data segment count. */
1688         cmd_pkt->entry_count = (uint8_t)req_cnt;
1689         wmb();
1690         /* Adjust ring index. */
1691         req->ring_index++;
1692         if (req->ring_index == req->length) {
1693                 req->ring_index = 0;
1694                 req->ring_ptr = req->ring;
1695         } else
1696                 req->ring_ptr++;
1697
1698         sp->flags |= SRB_DMA_VALID;
1699
1700         /* Set chip new ring index. */
1701         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1702
1703         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1704         return QLA_SUCCESS;
1705
1706 queuing_error:
1707         if (tot_dsds)
1708                 scsi_dma_unmap(cmd);
1709
1710         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1711
1712         return QLA_FUNCTION_FAILED;
1713 }
1714
1715 /**
1716  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1717  * @sp: command to send to the ISP
1718  *
1719  * Returns non-zero if a failure occurred, else zero.
1720  */
1721 int
1722 qla24xx_dif_start_scsi(srb_t *sp)
1723 {
1724         int                     nseg;
1725         unsigned long           flags;
1726         uint32_t                *clr_ptr;
1727         uint32_t                index;
1728         uint32_t                handle;
1729         uint16_t                cnt;
1730         uint16_t                req_cnt = 0;
1731         uint16_t                tot_dsds;
1732         uint16_t                tot_prot_dsds;
1733         uint16_t                fw_prot_opts = 0;
1734         struct req_que          *req = NULL;
1735         struct rsp_que          *rsp = NULL;
1736         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1737         struct scsi_qla_host    *vha = sp->vha;
1738         struct qla_hw_data      *ha = vha->hw;
1739         struct cmd_type_crc_2   *cmd_pkt;
1740         uint32_t                status = 0;
1741
1742 #define QDSS_GOT_Q_SPACE        BIT_0
1743
1744         /* Only process protection or >16 cdb in this routine */
1745         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1746                 if (cmd->cmd_len <= 16)
1747                         return qla24xx_start_scsi(sp);
1748         }
1749
1750         /* Setup device pointers. */
1751         req = vha->req;
1752         rsp = req->rsp;
1753
1754         /* So we know we haven't pci_map'ed anything yet */
1755         tot_dsds = 0;
1756
1757         /* Send marker if required */
1758         if (vha->marker_needed != 0) {
1759                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1760                     QLA_SUCCESS)
1761                         return QLA_FUNCTION_FAILED;
1762                 vha->marker_needed = 0;
1763         }
1764
1765         /* Acquire ring specific lock */
1766         spin_lock_irqsave(&ha->hardware_lock, flags);
1767
1768         /* Check for room in outstanding command list. */
1769         handle = req->current_outstanding_cmd;
1770         for (index = 1; index < req->num_outstanding_cmds; index++) {
1771                 handle++;
1772                 if (handle == req->num_outstanding_cmds)
1773                         handle = 1;
1774                 if (!req->outstanding_cmds[handle])
1775                         break;
1776         }
1777
1778         if (index == req->num_outstanding_cmds)
1779                 goto queuing_error;
1780
1781         /* Compute number of required data segments */
1782         /* Map the sg table so we have an accurate count of sg entries needed */
1783         if (scsi_sg_count(cmd)) {
1784                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1785                     scsi_sg_count(cmd), cmd->sc_data_direction);
1786                 if (unlikely(!nseg))
1787                         goto queuing_error;
1788                 else
1789                         sp->flags |= SRB_DMA_VALID;
1790
1791                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1792                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1793                         struct qla2_sgx sgx;
1794                         uint32_t        partial;
1795
1796                         memset(&sgx, 0, sizeof(struct qla2_sgx));
1797                         sgx.tot_bytes = scsi_bufflen(cmd);
1798                         sgx.cur_sg = scsi_sglist(cmd);
1799                         sgx.sp = sp;
1800
1801                         nseg = 0;
1802                         while (qla24xx_get_one_block_sg(
1803                             cmd->device->sector_size, &sgx, &partial))
1804                                 nseg++;
1805                 }
1806         } else
1807                 nseg = 0;
1808
1809         /* number of required data segments */
1810         tot_dsds = nseg;
1811
1812         /* Compute number of required protection segments */
1813         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1814                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1815                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1816                 if (unlikely(!nseg))
1817                         goto queuing_error;
1818                 else
1819                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
1820
1821                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1822                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1823                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1824                 }
1825         } else {
1826                 nseg = 0;
1827         }
1828
1829         req_cnt = 1;
1830         /* Total Data and protection sg segment(s) */
1831         tot_prot_dsds = nseg;
1832         tot_dsds += nseg;
1833         if (req->cnt < (req_cnt + 2)) {
1834                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1835                     RD_REG_DWORD_RELAXED(req->req_q_out);
1836                 if (req->ring_index < cnt)
1837                         req->cnt = cnt - req->ring_index;
1838                 else
1839                         req->cnt = req->length -
1840                                 (req->ring_index - cnt);
1841                 if (req->cnt < (req_cnt + 2))
1842                         goto queuing_error;
1843         }
1844
1845         status |= QDSS_GOT_Q_SPACE;
1846
1847         /* Build header part of command packet (excluding the OPCODE). */
1848         req->current_outstanding_cmd = handle;
1849         req->outstanding_cmds[handle] = sp;
1850         sp->handle = handle;
1851         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1852         req->cnt -= req_cnt;
1853
1854         /* Fill-in common area */
1855         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1856         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1857
1858         clr_ptr = (uint32_t *)cmd_pkt + 2;
1859         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1860
1861         /* Set NPORT-ID and LUN number*/
1862         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1863         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1864         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1865         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1866
1867         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1868         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1869
1870         /* Total Data and protection segment(s) */
1871         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1872
1873         /* Build IOCB segments and adjust for data protection segments */
1874         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1875             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1876                 QLA_SUCCESS)
1877                 goto queuing_error;
1878
1879         cmd_pkt->entry_count = (uint8_t)req_cnt;
1880         /* Specify response queue number where completion should happen */
1881         cmd_pkt->entry_status = (uint8_t) rsp->id;
1882         cmd_pkt->timeout = cpu_to_le16(0);
1883         wmb();
1884
1885         /* Adjust ring index. */
1886         req->ring_index++;
1887         if (req->ring_index == req->length) {
1888                 req->ring_index = 0;
1889                 req->ring_ptr = req->ring;
1890         } else
1891                 req->ring_ptr++;
1892
1893         /* Set chip new ring index. */
1894         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1895
1896         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1897
1898         return QLA_SUCCESS;
1899
1900 queuing_error:
1901         if (status & QDSS_GOT_Q_SPACE) {
1902                 req->outstanding_cmds[handle] = NULL;
1903                 req->cnt += req_cnt;
1904         }
1905         /* Cleanup will be performed by the caller (queuecommand) */
1906
1907         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1908         return QLA_FUNCTION_FAILED;
1909 }
1910
1911 /**
1912  * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
1913  * @sp: command to send to the ISP
1914  *
1915  * Returns non-zero if a failure occurred, else zero.
1916  */
1917 static int
1918 qla2xxx_start_scsi_mq(srb_t *sp)
1919 {
1920         int             nseg;
1921         unsigned long   flags;
1922         uint32_t        *clr_ptr;
1923         uint32_t        index;
1924         uint32_t        handle;
1925         struct cmd_type_7 *cmd_pkt;
1926         uint16_t        cnt;
1927         uint16_t        req_cnt;
1928         uint16_t        tot_dsds;
1929         struct req_que *req = NULL;
1930         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1931         struct scsi_qla_host *vha = sp->fcport->vha;
1932         struct qla_hw_data *ha = vha->hw;
1933         struct qla_qpair *qpair = sp->qpair;
1934
1935         /* Acquire qpair specific lock */
1936         spin_lock_irqsave(&qpair->qp_lock, flags);
1937
1938         /* Setup qpair pointers */
1939         req = qpair->req;
1940
1941         /* So we know we haven't pci_map'ed anything yet */
1942         tot_dsds = 0;
1943
1944         /* Send marker if required */
1945         if (vha->marker_needed != 0) {
1946                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
1947                     QLA_SUCCESS) {
1948                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
1949                         return QLA_FUNCTION_FAILED;
1950                 }
1951                 vha->marker_needed = 0;
1952         }
1953
1954         /* Check for room in outstanding command list. */
1955         handle = req->current_outstanding_cmd;
1956         for (index = 1; index < req->num_outstanding_cmds; index++) {
1957                 handle++;
1958                 if (handle == req->num_outstanding_cmds)
1959                         handle = 1;
1960                 if (!req->outstanding_cmds[handle])
1961                         break;
1962         }
1963         if (index == req->num_outstanding_cmds)
1964                 goto queuing_error;
1965
1966         /* Map the sg table so we have an accurate count of sg entries needed */
1967         if (scsi_sg_count(cmd)) {
1968                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1969                     scsi_sg_count(cmd), cmd->sc_data_direction);
1970                 if (unlikely(!nseg))
1971                         goto queuing_error;
1972         } else
1973                 nseg = 0;
1974
1975         tot_dsds = nseg;
1976         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1977         if (req->cnt < (req_cnt + 2)) {
1978                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1979                     RD_REG_DWORD_RELAXED(req->req_q_out);
1980                 if (req->ring_index < cnt)
1981                         req->cnt = cnt - req->ring_index;
1982                 else
1983                         req->cnt = req->length -
1984                                 (req->ring_index - cnt);
1985                 if (req->cnt < (req_cnt + 2))
1986                         goto queuing_error;
1987         }
1988
1989         /* Build command packet. */
1990         req->current_outstanding_cmd = handle;
1991         req->outstanding_cmds[handle] = sp;
1992         sp->handle = handle;
1993         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1994         req->cnt -= req_cnt;
1995
1996         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1997         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1998
1999         /* Zero out remaining portion of packet. */
2000         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
2001         clr_ptr = (uint32_t *)cmd_pkt + 2;
2002         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2003         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2004
2005         /* Set NPORT-ID and LUN number*/
2006         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2007         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2008         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2009         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2010         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2011
2012         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2013         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2014
2015         cmd_pkt->task = TSK_SIMPLE;
2016
2017         /* Load SCSI command packet. */
2018         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2019         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2020
2021         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2022
2023         /* Build IOCB segments */
2024         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
2025
2026         /* Set total data segment count. */
2027         cmd_pkt->entry_count = (uint8_t)req_cnt;
2028         wmb();
2029         /* Adjust ring index. */
2030         req->ring_index++;
2031         if (req->ring_index == req->length) {
2032                 req->ring_index = 0;
2033                 req->ring_ptr = req->ring;
2034         } else
2035                 req->ring_ptr++;
2036
2037         sp->flags |= SRB_DMA_VALID;
2038
2039         /* Set chip new ring index. */
2040         WRT_REG_DWORD(req->req_q_in, req->ring_index);
2041
2042         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2043         return QLA_SUCCESS;
2044
2045 queuing_error:
2046         if (tot_dsds)
2047                 scsi_dma_unmap(cmd);
2048
2049         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2050
2051         return QLA_FUNCTION_FAILED;
2052 }
2053
2054
2055 /**
2056  * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
2057  * @sp: command to send to the ISP
2058  *
2059  * Returns non-zero if a failure occurred, else zero.
2060  */
2061 int
2062 qla2xxx_dif_start_scsi_mq(srb_t *sp)
2063 {
2064         int                     nseg;
2065         unsigned long           flags;
2066         uint32_t                *clr_ptr;
2067         uint32_t                index;
2068         uint32_t                handle;
2069         uint16_t                cnt;
2070         uint16_t                req_cnt = 0;
2071         uint16_t                tot_dsds;
2072         uint16_t                tot_prot_dsds;
2073         uint16_t                fw_prot_opts = 0;
2074         struct req_que          *req = NULL;
2075         struct rsp_que          *rsp = NULL;
2076         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
2077         struct scsi_qla_host    *vha = sp->fcport->vha;
2078         struct qla_hw_data      *ha = vha->hw;
2079         struct cmd_type_crc_2   *cmd_pkt;
2080         uint32_t                status = 0;
2081         struct qla_qpair        *qpair = sp->qpair;
2082
2083 #define QDSS_GOT_Q_SPACE        BIT_0
2084
2085         /* Check for host side state */
2086         if (!qpair->online) {
2087                 cmd->result = DID_NO_CONNECT << 16;
2088                 return QLA_INTERFACE_ERROR;
2089         }
2090
2091         if (!qpair->difdix_supported &&
2092                 scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2093                 cmd->result = DID_NO_CONNECT << 16;
2094                 return QLA_INTERFACE_ERROR;
2095         }
2096
2097         /* Only process protection or >16 cdb in this routine */
2098         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
2099                 if (cmd->cmd_len <= 16)
2100                         return qla2xxx_start_scsi_mq(sp);
2101         }
2102
2103         spin_lock_irqsave(&qpair->qp_lock, flags);
2104
2105         /* Setup qpair pointers */
2106         rsp = qpair->rsp;
2107         req = qpair->req;
2108
2109         /* So we know we haven't pci_map'ed anything yet */
2110         tot_dsds = 0;
2111
2112         /* Send marker if required */
2113         if (vha->marker_needed != 0) {
2114                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
2115                     QLA_SUCCESS) {
2116                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2117                         return QLA_FUNCTION_FAILED;
2118                 }
2119                 vha->marker_needed = 0;
2120         }
2121
2122         /* Check for room in outstanding command list. */
2123         handle = req->current_outstanding_cmd;
2124         for (index = 1; index < req->num_outstanding_cmds; index++) {
2125                 handle++;
2126                 if (handle == req->num_outstanding_cmds)
2127                         handle = 1;
2128                 if (!req->outstanding_cmds[handle])
2129                         break;
2130         }
2131
2132         if (index == req->num_outstanding_cmds)
2133                 goto queuing_error;
2134
2135         /* Compute number of required data segments */
2136         /* Map the sg table so we have an accurate count of sg entries needed */
2137         if (scsi_sg_count(cmd)) {
2138                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2139                     scsi_sg_count(cmd), cmd->sc_data_direction);
2140                 if (unlikely(!nseg))
2141                         goto queuing_error;
2142                 else
2143                         sp->flags |= SRB_DMA_VALID;
2144
2145                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2146                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2147                         struct qla2_sgx sgx;
2148                         uint32_t        partial;
2149
2150                         memset(&sgx, 0, sizeof(struct qla2_sgx));
2151                         sgx.tot_bytes = scsi_bufflen(cmd);
2152                         sgx.cur_sg = scsi_sglist(cmd);
2153                         sgx.sp = sp;
2154
2155                         nseg = 0;
2156                         while (qla24xx_get_one_block_sg(
2157                             cmd->device->sector_size, &sgx, &partial))
2158                                 nseg++;
2159                 }
2160         } else
2161                 nseg = 0;
2162
2163         /* number of required data segments */
2164         tot_dsds = nseg;
2165
2166         /* Compute number of required protection segments */
2167         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
2168                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
2169                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
2170                 if (unlikely(!nseg))
2171                         goto queuing_error;
2172                 else
2173                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
2174
2175                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2176                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2177                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
2178                 }
2179         } else {
2180                 nseg = 0;
2181         }
2182
2183         req_cnt = 1;
2184         /* Total Data and protection sg segment(s) */
2185         tot_prot_dsds = nseg;
2186         tot_dsds += nseg;
2187         if (req->cnt < (req_cnt + 2)) {
2188                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
2189                     RD_REG_DWORD_RELAXED(req->req_q_out);
2190                 if (req->ring_index < cnt)
2191                         req->cnt = cnt - req->ring_index;
2192                 else
2193                         req->cnt = req->length -
2194                                 (req->ring_index - cnt);
2195                 if (req->cnt < (req_cnt + 2))
2196                         goto queuing_error;
2197         }
2198
2199         status |= QDSS_GOT_Q_SPACE;
2200
2201         /* Build header part of command packet (excluding the OPCODE). */
2202         req->current_outstanding_cmd = handle;
2203         req->outstanding_cmds[handle] = sp;
2204         sp->handle = handle;
2205         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2206         req->cnt -= req_cnt;
2207
2208         /* Fill-in common area */
2209         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
2210         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2211
2212         clr_ptr = (uint32_t *)cmd_pkt + 2;
2213         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2214
2215         /* Set NPORT-ID and LUN number*/
2216         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2217         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2218         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2219         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2220
2221         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2222         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2223
2224         /* Total Data and protection segment(s) */
2225         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2226
2227         /* Build IOCB segments and adjust for data protection segments */
2228         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
2229             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
2230                 QLA_SUCCESS)
2231                 goto queuing_error;
2232
2233         cmd_pkt->entry_count = (uint8_t)req_cnt;
2234         cmd_pkt->timeout = cpu_to_le16(0);
2235         wmb();
2236
2237         /* Adjust ring index. */
2238         req->ring_index++;
2239         if (req->ring_index == req->length) {
2240                 req->ring_index = 0;
2241                 req->ring_ptr = req->ring;
2242         } else
2243                 req->ring_ptr++;
2244
2245         /* Set chip new ring index. */
2246         WRT_REG_DWORD(req->req_q_in, req->ring_index);
2247
2248         /* Manage unprocessed RIO/ZIO commands in response queue. */
2249         if (vha->flags.process_response_queue &&
2250             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2251                 qla24xx_process_response_queue(vha, rsp);
2252
2253         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2254
2255         return QLA_SUCCESS;
2256
2257 queuing_error:
2258         if (status & QDSS_GOT_Q_SPACE) {
2259                 req->outstanding_cmds[handle] = NULL;
2260                 req->cnt += req_cnt;
2261         }
2262         /* Cleanup will be performed by the caller (queuecommand) */
2263
2264         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2265         return QLA_FUNCTION_FAILED;
2266 }
2267
2268 /* Generic Control-SRB manipulation functions. */
2269
2270 /* hardware_lock assumed to be held. */
2271
2272 void *
2273 __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
2274 {
2275         scsi_qla_host_t *vha = qpair->vha;
2276         struct qla_hw_data *ha = vha->hw;
2277         struct req_que *req = qpair->req;
2278         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
2279         uint32_t index, handle;
2280         request_t *pkt;
2281         uint16_t cnt, req_cnt;
2282
2283         pkt = NULL;
2284         req_cnt = 1;
2285         handle = 0;
2286
2287         if (sp && (sp->type != SRB_SCSI_CMD)) {
2288                 /* Adjust entry-counts as needed. */
2289                 req_cnt = sp->iocbs;
2290         }
2291
2292         /* Check for room on request queue. */
2293         if (req->cnt < req_cnt + 2) {
2294                 if (qpair->use_shadow_reg)
2295                         cnt = *req->out_ptr;
2296                 else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
2297                     IS_QLA28XX(ha))
2298                         cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
2299                 else if (IS_P3P_TYPE(ha))
2300                         cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
2301                 else if (IS_FWI2_CAPABLE(ha))
2302                         cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
2303                 else if (IS_QLAFX00(ha))
2304                         cnt = RD_REG_DWORD(&reg->ispfx00.req_q_out);
2305                 else
2306                         cnt = qla2x00_debounce_register(
2307                             ISP_REQ_Q_OUT(ha, &reg->isp));
2308
2309                 if  (req->ring_index < cnt)
2310                         req->cnt = cnt - req->ring_index;
2311                 else
2312                         req->cnt = req->length -
2313                             (req->ring_index - cnt);
2314         }
2315         if (req->cnt < req_cnt + 2)
2316                 goto queuing_error;
2317
2318         if (sp) {
2319                 /* Check for room in outstanding command list. */
2320                 handle = req->current_outstanding_cmd;
2321                 for (index = 1; index < req->num_outstanding_cmds; index++) {
2322                         handle++;
2323                         if (handle == req->num_outstanding_cmds)
2324                                 handle = 1;
2325                         if (!req->outstanding_cmds[handle])
2326                                 break;
2327                 }
2328                 if (index == req->num_outstanding_cmds) {
2329                         ql_log(ql_log_warn, vha, 0x700b,
2330                             "No room on outstanding cmd array.\n");
2331                         goto queuing_error;
2332                 }
2333
2334                 /* Prep command array. */
2335                 req->current_outstanding_cmd = handle;
2336                 req->outstanding_cmds[handle] = sp;
2337                 sp->handle = handle;
2338         }
2339
2340         /* Prep packet */
2341         req->cnt -= req_cnt;
2342         pkt = req->ring_ptr;
2343         memset(pkt, 0, REQUEST_ENTRY_SIZE);
2344         if (IS_QLAFX00(ha)) {
2345                 WRT_REG_BYTE((void __iomem *)&pkt->entry_count, req_cnt);
2346                 WRT_REG_WORD((void __iomem *)&pkt->handle, handle);
2347         } else {
2348                 pkt->entry_count = req_cnt;
2349                 pkt->handle = handle;
2350         }
2351
2352         return pkt;
2353
2354 queuing_error:
2355         qpair->tgt_counters.num_alloc_iocb_failed++;
2356         return pkt;
2357 }
2358
2359 void *
2360 qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
2361 {
2362         scsi_qla_host_t *vha = qpair->vha;
2363
2364         if (qla2x00_reset_active(vha))
2365                 return NULL;
2366
2367         return __qla2x00_alloc_iocbs(qpair, sp);
2368 }
2369
2370 void *
2371 qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
2372 {
2373         return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
2374 }
2375
2376 static void
2377 qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2378 {
2379         struct srb_iocb *lio = &sp->u.iocb_cmd;
2380
2381         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2382         logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2383         if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
2384                 logio->control_flags |= LCF_NVME_PRLI;
2385                 if (sp->vha->flags.nvme_first_burst)
2386                         logio->io_parameter[0] = NVME_PRLI_SP_FIRST_BURST;
2387         }
2388
2389         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2390         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2391         logio->port_id[1] = sp->fcport->d_id.b.area;
2392         logio->port_id[2] = sp->fcport->d_id.b.domain;
2393         logio->vp_index = sp->vha->vp_idx;
2394 }
2395
2396 static void
2397 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2398 {
2399         struct srb_iocb *lio = &sp->u.iocb_cmd;
2400
2401         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2402         if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
2403                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2404         } else {
2405                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2406                 if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
2407                         logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
2408                 if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
2409                         logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
2410         }
2411         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2412         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2413         logio->port_id[1] = sp->fcport->d_id.b.area;
2414         logio->port_id[2] = sp->fcport->d_id.b.domain;
2415         logio->vp_index = sp->vha->vp_idx;
2416 }
2417
2418 static void
2419 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
2420 {
2421         struct qla_hw_data *ha = sp->vha->hw;
2422         struct srb_iocb *lio = &sp->u.iocb_cmd;
2423         uint16_t opts;
2424
2425         mbx->entry_type = MBX_IOCB_TYPE;
2426         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2427         mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
2428         opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
2429         opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
2430         if (HAS_EXTENDED_IDS(ha)) {
2431                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2432                 mbx->mb10 = cpu_to_le16(opts);
2433         } else {
2434                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
2435         }
2436         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2437         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2438             sp->fcport->d_id.b.al_pa);
2439         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2440 }
2441
2442 static void
2443 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2444 {
2445         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2446         logio->control_flags =
2447             cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
2448         if (!sp->fcport->keep_nport_handle)
2449                 logio->control_flags |= cpu_to_le16(LCF_FREE_NPORT);
2450         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2451         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2452         logio->port_id[1] = sp->fcport->d_id.b.area;
2453         logio->port_id[2] = sp->fcport->d_id.b.domain;
2454         logio->vp_index = sp->vha->vp_idx;
2455 }
2456
2457 static void
2458 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
2459 {
2460         struct qla_hw_data *ha = sp->vha->hw;
2461
2462         mbx->entry_type = MBX_IOCB_TYPE;
2463         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2464         mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
2465         mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
2466             cpu_to_le16(sp->fcport->loop_id) :
2467             cpu_to_le16(sp->fcport->loop_id << 8);
2468         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2469         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2470             sp->fcport->d_id.b.al_pa);
2471         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2472         /* Implicit: mbx->mbx10 = 0. */
2473 }
2474
2475 static void
2476 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2477 {
2478         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2479         logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
2480         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2481         logio->vp_index = sp->vha->vp_idx;
2482 }
2483
2484 static void
2485 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
2486 {
2487         struct qla_hw_data *ha = sp->vha->hw;
2488
2489         mbx->entry_type = MBX_IOCB_TYPE;
2490         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2491         mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
2492         if (HAS_EXTENDED_IDS(ha)) {
2493                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2494                 mbx->mb10 = cpu_to_le16(BIT_0);
2495         } else {
2496                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
2497         }
2498         mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
2499         mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
2500         mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2501         mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2502         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2503 }
2504
2505 static void
2506 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2507 {
2508         uint32_t flags;
2509         uint64_t lun;
2510         struct fc_port *fcport = sp->fcport;
2511         scsi_qla_host_t *vha = fcport->vha;
2512         struct qla_hw_data *ha = vha->hw;
2513         struct srb_iocb *iocb = &sp->u.iocb_cmd;
2514         struct req_que *req = vha->req;
2515
2516         flags = iocb->u.tmf.flags;
2517         lun = iocb->u.tmf.lun;
2518
2519         tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2520         tsk->entry_count = 1;
2521         tsk->handle = MAKE_HANDLE(req->id, tsk->handle);
2522         tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2523         tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2524         tsk->control_flags = cpu_to_le32(flags);
2525         tsk->port_id[0] = fcport->d_id.b.al_pa;
2526         tsk->port_id[1] = fcport->d_id.b.area;
2527         tsk->port_id[2] = fcport->d_id.b.domain;
2528         tsk->vp_index = fcport->vha->vp_idx;
2529
2530         if (flags == TCF_LUN_RESET) {
2531                 int_to_scsilun(lun, &tsk->lun);
2532                 host_to_fcp_swap((uint8_t *)&tsk->lun,
2533                         sizeof(tsk->lun));
2534         }
2535 }
2536
2537 void qla2x00_init_timer(srb_t *sp, unsigned long tmo)
2538 {
2539         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
2540         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
2541         sp->free = qla2x00_sp_free;
2542         if (IS_QLAFX00(sp->vha->hw) && sp->type == SRB_FXIOCB_DCMD)
2543                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
2544         sp->start_timer = 1;
2545 }
2546
2547 static void
2548 qla2x00_els_dcmd_sp_free(void *data)
2549 {
2550         srb_t *sp = data;
2551         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2552
2553         kfree(sp->fcport);
2554
2555         if (elsio->u.els_logo.els_logo_pyld)
2556                 dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
2557                     elsio->u.els_logo.els_logo_pyld,
2558                     elsio->u.els_logo.els_logo_pyld_dma);
2559
2560         del_timer(&elsio->timer);
2561         qla2x00_rel_sp(sp);
2562 }
2563
2564 static void
2565 qla2x00_els_dcmd_iocb_timeout(void *data)
2566 {
2567         srb_t *sp = data;
2568         fc_port_t *fcport = sp->fcport;
2569         struct scsi_qla_host *vha = sp->vha;
2570         struct srb_iocb *lio = &sp->u.iocb_cmd;
2571
2572         ql_dbg(ql_dbg_io, vha, 0x3069,
2573             "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
2574             sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
2575             fcport->d_id.b.al_pa);
2576
2577         complete(&lio->u.els_logo.comp);
2578 }
2579
2580 static void
2581 qla2x00_els_dcmd_sp_done(void *ptr, int res)
2582 {
2583         srb_t *sp = ptr;
2584         fc_port_t *fcport = sp->fcport;
2585         struct srb_iocb *lio = &sp->u.iocb_cmd;
2586         struct scsi_qla_host *vha = sp->vha;
2587
2588         ql_dbg(ql_dbg_io, vha, 0x3072,
2589             "%s hdl=%x, portid=%02x%02x%02x done\n",
2590             sp->name, sp->handle, fcport->d_id.b.domain,
2591             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2592
2593         complete(&lio->u.els_logo.comp);
2594 }
2595
2596 int
2597 qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
2598     port_id_t remote_did)
2599 {
2600         srb_t *sp;
2601         fc_port_t *fcport = NULL;
2602         struct srb_iocb *elsio = NULL;
2603         struct qla_hw_data *ha = vha->hw;
2604         struct els_logo_payload logo_pyld;
2605         int rval = QLA_SUCCESS;
2606
2607         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
2608         if (!fcport) {
2609                ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
2610                return -ENOMEM;
2611         }
2612
2613         /* Alloc SRB structure */
2614         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2615         if (!sp) {
2616                 kfree(fcport);
2617                 ql_log(ql_log_info, vha, 0x70e6,
2618                  "SRB allocation failed\n");
2619                 return -ENOMEM;
2620         }
2621
2622         elsio = &sp->u.iocb_cmd;
2623         fcport->loop_id = 0xFFFF;
2624         fcport->d_id.b.domain = remote_did.b.domain;
2625         fcport->d_id.b.area = remote_did.b.area;
2626         fcport->d_id.b.al_pa = remote_did.b.al_pa;
2627
2628         ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
2629             fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
2630
2631         sp->type = SRB_ELS_DCMD;
2632         sp->name = "ELS_DCMD";
2633         sp->fcport = fcport;
2634         elsio->timeout = qla2x00_els_dcmd_iocb_timeout;
2635         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT);
2636         init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
2637         sp->done = qla2x00_els_dcmd_sp_done;
2638         sp->free = qla2x00_els_dcmd_sp_free;
2639
2640         elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
2641                             DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
2642                             GFP_KERNEL);
2643
2644         if (!elsio->u.els_logo.els_logo_pyld) {
2645                 sp->free(sp);
2646                 return QLA_FUNCTION_FAILED;
2647         }
2648
2649         memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
2650
2651         elsio->u.els_logo.els_cmd = els_opcode;
2652         logo_pyld.opcode = els_opcode;
2653         logo_pyld.s_id[0] = vha->d_id.b.al_pa;
2654         logo_pyld.s_id[1] = vha->d_id.b.area;
2655         logo_pyld.s_id[2] = vha->d_id.b.domain;
2656         host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
2657         memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
2658
2659         memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
2660             sizeof(struct els_logo_payload));
2661
2662         rval = qla2x00_start_sp(sp);
2663         if (rval != QLA_SUCCESS) {
2664                 sp->free(sp);
2665                 return QLA_FUNCTION_FAILED;
2666         }
2667
2668         ql_dbg(ql_dbg_io, vha, 0x3074,
2669             "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
2670             sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
2671             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2672
2673         wait_for_completion(&elsio->u.els_logo.comp);
2674
2675         sp->free(sp);
2676         return rval;
2677 }
2678
2679 static void
2680 qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2681 {
2682         scsi_qla_host_t *vha = sp->vha;
2683         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2684
2685         els_iocb->entry_type = ELS_IOCB_TYPE;
2686         els_iocb->entry_count = 1;
2687         els_iocb->sys_define = 0;
2688         els_iocb->entry_status = 0;
2689         els_iocb->handle = sp->handle;
2690         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2691         els_iocb->tx_dsd_count = 1;
2692         els_iocb->vp_index = vha->vp_idx;
2693         els_iocb->sof_type = EST_SOFI3;
2694         els_iocb->rx_dsd_count = 0;
2695         els_iocb->opcode = elsio->u.els_logo.els_cmd;
2696
2697         els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2698         els_iocb->port_id[1] = sp->fcport->d_id.b.area;
2699         els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2700         els_iocb->s_id[0] = vha->d_id.b.al_pa;
2701         els_iocb->s_id[1] = vha->d_id.b.area;
2702         els_iocb->s_id[2] = vha->d_id.b.domain;
2703
2704         if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
2705                 els_iocb->control_flags = 0;
2706                 els_iocb->tx_byte_count = els_iocb->tx_len =
2707                         cpu_to_le32(sizeof(struct els_plogi_payload));
2708                 put_unaligned_le64(elsio->u.els_plogi.els_plogi_pyld_dma,
2709                                    &els_iocb->tx_address);
2710                 els_iocb->rx_dsd_count = 1;
2711                 els_iocb->rx_byte_count = els_iocb->rx_len =
2712                         cpu_to_le32(sizeof(struct els_plogi_payload));
2713                 put_unaligned_le64(elsio->u.els_plogi.els_resp_pyld_dma,
2714                                    &els_iocb->rx_address);
2715
2716                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
2717                     "PLOGI ELS IOCB:\n");
2718                 ql_dump_buffer(ql_log_info, vha, 0x0109,
2719                     (uint8_t *)els_iocb, 0x70);
2720         } else {
2721                 els_iocb->control_flags = 1 << 13;
2722                 els_iocb->tx_byte_count =
2723                         cpu_to_le32(sizeof(struct els_logo_payload));
2724                 put_unaligned_le64(elsio->u.els_logo.els_logo_pyld_dma,
2725                                    &els_iocb->tx_address);
2726                 els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
2727
2728                 els_iocb->rx_byte_count = 0;
2729                 els_iocb->rx_address = 0;
2730                 els_iocb->rx_len = 0;
2731         }
2732
2733         sp->vha->qla_stats.control_requests++;
2734 }
2735
2736 static void
2737 qla2x00_els_dcmd2_iocb_timeout(void *data)
2738 {
2739         srb_t *sp = data;
2740         fc_port_t *fcport = sp->fcport;
2741         struct scsi_qla_host *vha = sp->vha;
2742         struct qla_hw_data *ha = vha->hw;
2743         unsigned long flags = 0;
2744         int res;
2745
2746         ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
2747             "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
2748             sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
2749
2750         /* Abort the exchange */
2751         spin_lock_irqsave(&ha->hardware_lock, flags);
2752         res = ha->isp_ops->abort_command(sp);
2753         ql_dbg(ql_dbg_io, vha, 0x3070,
2754             "mbx abort_command %s\n",
2755             (res == QLA_SUCCESS) ? "successful" : "failed");
2756         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2757
2758         sp->done(sp, QLA_FUNCTION_TIMEOUT);
2759 }
2760
2761 static void
2762 qla2x00_els_dcmd2_sp_done(void *ptr, int res)
2763 {
2764         srb_t *sp = ptr;
2765         fc_port_t *fcport = sp->fcport;
2766         struct srb_iocb *lio = &sp->u.iocb_cmd;
2767         struct scsi_qla_host *vha = sp->vha;
2768         struct event_arg ea;
2769         struct qla_work_evt *e;
2770
2771         ql_dbg(ql_dbg_disc, vha, 0x3072,
2772             "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
2773             sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
2774
2775         fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
2776         del_timer(&sp->u.iocb_cmd.timer);
2777
2778         if (sp->flags & SRB_WAKEUP_ON_COMP)
2779                 complete(&lio->u.els_plogi.comp);
2780         else {
2781                 if (res) {
2782                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2783                 } else {
2784                         memset(&ea, 0, sizeof(ea));
2785                         ea.fcport = fcport;
2786                         ea.rc = res;
2787                         ea.event = FCME_ELS_PLOGI_DONE;
2788                         qla2x00_fcport_event_handler(vha, &ea);
2789                 }
2790
2791                 e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
2792                 if (!e) {
2793                         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2794
2795                         if (elsio->u.els_plogi.els_plogi_pyld)
2796                                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2797                                     elsio->u.els_plogi.tx_size,
2798                                     elsio->u.els_plogi.els_plogi_pyld,
2799                                     elsio->u.els_plogi.els_plogi_pyld_dma);
2800
2801                         if (elsio->u.els_plogi.els_resp_pyld)
2802                                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2803                                     elsio->u.els_plogi.rx_size,
2804                                     elsio->u.els_plogi.els_resp_pyld,
2805                                     elsio->u.els_plogi.els_resp_pyld_dma);
2806                         sp->free(sp);
2807                         return;
2808                 }
2809                 e->u.iosb.sp = sp;
2810                 qla2x00_post_work(vha, e);
2811         }
2812 }
2813
2814 int
2815 qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
2816     fc_port_t *fcport, bool wait)
2817 {
2818         srb_t *sp;
2819         struct srb_iocb *elsio = NULL;
2820         struct qla_hw_data *ha = vha->hw;
2821         int rval = QLA_SUCCESS;
2822         void    *ptr, *resp_ptr;
2823
2824         /* Alloc SRB structure */
2825         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2826         if (!sp) {
2827                 ql_log(ql_log_info, vha, 0x70e6,
2828                  "SRB allocation failed\n");
2829                 return -ENOMEM;
2830         }
2831
2832         elsio = &sp->u.iocb_cmd;
2833         ql_dbg(ql_dbg_io, vha, 0x3073,
2834             "Enter: PLOGI portid=%06x\n", fcport->d_id.b24);
2835
2836         fcport->flags |= FCF_ASYNC_SENT;
2837         sp->type = SRB_ELS_DCMD;
2838         sp->name = "ELS_DCMD";
2839         sp->fcport = fcport;
2840
2841         elsio->timeout = qla2x00_els_dcmd2_iocb_timeout;
2842         init_completion(&elsio->u.els_plogi.comp);
2843         if (wait)
2844                 sp->flags = SRB_WAKEUP_ON_COMP;
2845
2846         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT + 2);
2847
2848         sp->done = qla2x00_els_dcmd2_sp_done;
2849         elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
2850
2851         ptr = elsio->u.els_plogi.els_plogi_pyld =
2852             dma_alloc_coherent(&ha->pdev->dev, DMA_POOL_SIZE,
2853                 &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
2854
2855         if (!elsio->u.els_plogi.els_plogi_pyld) {
2856                 rval = QLA_FUNCTION_FAILED;
2857                 goto out;
2858         }
2859
2860         resp_ptr = elsio->u.els_plogi.els_resp_pyld =
2861             dma_alloc_coherent(&ha->pdev->dev, DMA_POOL_SIZE,
2862                 &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
2863
2864         if (!elsio->u.els_plogi.els_resp_pyld) {
2865                 rval = QLA_FUNCTION_FAILED;
2866                 goto out;
2867         }
2868
2869         ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
2870
2871         memset(ptr, 0, sizeof(struct els_plogi_payload));
2872         memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
2873         memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
2874             &ha->plogi_els_payld.data,
2875             sizeof(elsio->u.els_plogi.els_plogi_pyld->data));
2876
2877         elsio->u.els_plogi.els_cmd = els_opcode;
2878         elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
2879
2880         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
2881         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
2882             (uint8_t *)elsio->u.els_plogi.els_plogi_pyld, 0x70);
2883
2884         rval = qla2x00_start_sp(sp);
2885         if (rval != QLA_SUCCESS) {
2886                 rval = QLA_FUNCTION_FAILED;
2887         } else {
2888                 ql_dbg(ql_dbg_disc, vha, 0x3074,
2889                     "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
2890                     sp->name, sp->handle, fcport->loop_id,
2891                     fcport->d_id.b24, vha->d_id.b24);
2892         }
2893
2894         if (wait) {
2895                 wait_for_completion(&elsio->u.els_plogi.comp);
2896
2897                 if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
2898                         rval = QLA_FUNCTION_FAILED;
2899         } else {
2900                 goto done;
2901         }
2902
2903 out:
2904         fcport->flags &= ~(FCF_ASYNC_SENT);
2905         if (elsio->u.els_plogi.els_plogi_pyld)
2906                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2907                     elsio->u.els_plogi.tx_size,
2908                     elsio->u.els_plogi.els_plogi_pyld,
2909                     elsio->u.els_plogi.els_plogi_pyld_dma);
2910
2911         if (elsio->u.els_plogi.els_resp_pyld)
2912                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2913                     elsio->u.els_plogi.rx_size,
2914                     elsio->u.els_plogi.els_resp_pyld,
2915                     elsio->u.els_plogi.els_resp_pyld_dma);
2916
2917         sp->free(sp);
2918 done:
2919         return rval;
2920 }
2921
2922 static void
2923 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2924 {
2925         struct bsg_job *bsg_job = sp->u.bsg_job;
2926         struct fc_bsg_request *bsg_request = bsg_job->request;
2927
2928         els_iocb->entry_type = ELS_IOCB_TYPE;
2929         els_iocb->entry_count = 1;
2930         els_iocb->sys_define = 0;
2931         els_iocb->entry_status = 0;
2932         els_iocb->handle = sp->handle;
2933         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2934         els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
2935         els_iocb->vp_index = sp->vha->vp_idx;
2936         els_iocb->sof_type = EST_SOFI3;
2937         els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
2938
2939         els_iocb->opcode =
2940             sp->type == SRB_ELS_CMD_RPT ?
2941             bsg_request->rqst_data.r_els.els_code :
2942             bsg_request->rqst_data.h_els.command_code;
2943         els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2944         els_iocb->port_id[1] = sp->fcport->d_id.b.area;
2945         els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2946         els_iocb->control_flags = 0;
2947         els_iocb->rx_byte_count =
2948             cpu_to_le32(bsg_job->reply_payload.payload_len);
2949         els_iocb->tx_byte_count =
2950             cpu_to_le32(bsg_job->request_payload.payload_len);
2951
2952         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
2953                            &els_iocb->tx_address);
2954         els_iocb->tx_len = cpu_to_le32(sg_dma_len
2955             (bsg_job->request_payload.sg_list));
2956
2957         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
2958                            &els_iocb->rx_address);
2959         els_iocb->rx_len = cpu_to_le32(sg_dma_len
2960             (bsg_job->reply_payload.sg_list));
2961
2962         sp->vha->qla_stats.control_requests++;
2963 }
2964
2965 static void
2966 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
2967 {
2968         uint16_t        avail_dsds;
2969         struct dsd64    *cur_dsd;
2970         struct scatterlist *sg;
2971         int index;
2972         uint16_t tot_dsds;
2973         scsi_qla_host_t *vha = sp->vha;
2974         struct qla_hw_data *ha = vha->hw;
2975         struct bsg_job *bsg_job = sp->u.bsg_job;
2976         int entry_count = 1;
2977
2978         memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
2979         ct_iocb->entry_type = CT_IOCB_TYPE;
2980         ct_iocb->entry_status = 0;
2981         ct_iocb->handle1 = sp->handle;
2982         SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
2983         ct_iocb->status = cpu_to_le16(0);
2984         ct_iocb->control_flags = cpu_to_le16(0);
2985         ct_iocb->timeout = 0;
2986         ct_iocb->cmd_dsd_count =
2987             cpu_to_le16(bsg_job->request_payload.sg_cnt);
2988         ct_iocb->total_dsd_count =
2989             cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
2990         ct_iocb->req_bytecount =
2991             cpu_to_le32(bsg_job->request_payload.payload_len);
2992         ct_iocb->rsp_bytecount =
2993             cpu_to_le32(bsg_job->reply_payload.payload_len);
2994
2995         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
2996                            &ct_iocb->req_dsd.address);
2997         ct_iocb->req_dsd.length = ct_iocb->req_bytecount;
2998
2999         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3000                            &ct_iocb->rsp_dsd.address);
3001         ct_iocb->rsp_dsd.length = ct_iocb->rsp_bytecount;
3002
3003         avail_dsds = 1;
3004         cur_dsd = &ct_iocb->rsp_dsd;
3005         index = 0;
3006         tot_dsds = bsg_job->reply_payload.sg_cnt;
3007
3008         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
3009                 cont_a64_entry_t *cont_pkt;
3010
3011                 /* Allocate additional continuation packets? */
3012                 if (avail_dsds == 0) {
3013                         /*
3014                         * Five DSDs are available in the Cont.
3015                         * Type 1 IOCB.
3016                                */
3017                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3018                             vha->hw->req_q_map[0]);
3019                         cur_dsd = cont_pkt->dsd;
3020                         avail_dsds = 5;
3021                         entry_count++;
3022                 }
3023
3024                 append_dsd64(&cur_dsd, sg);
3025                 avail_dsds--;
3026         }
3027         ct_iocb->entry_count = entry_count;
3028
3029         sp->vha->qla_stats.control_requests++;
3030 }
3031
3032 static void
3033 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
3034 {
3035         uint16_t        avail_dsds;
3036         struct dsd64    *cur_dsd;
3037         struct scatterlist *sg;
3038         int index;
3039         uint16_t cmd_dsds, rsp_dsds;
3040         scsi_qla_host_t *vha = sp->vha;
3041         struct qla_hw_data *ha = vha->hw;
3042         struct bsg_job *bsg_job = sp->u.bsg_job;
3043         int entry_count = 1;
3044         cont_a64_entry_t *cont_pkt = NULL;
3045
3046         ct_iocb->entry_type = CT_IOCB_TYPE;
3047         ct_iocb->entry_status = 0;
3048         ct_iocb->sys_define = 0;
3049         ct_iocb->handle = sp->handle;
3050
3051         ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3052         ct_iocb->vp_index = sp->vha->vp_idx;
3053         ct_iocb->comp_status = cpu_to_le16(0);
3054
3055         cmd_dsds = bsg_job->request_payload.sg_cnt;
3056         rsp_dsds = bsg_job->reply_payload.sg_cnt;
3057
3058         ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
3059         ct_iocb->timeout = 0;
3060         ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
3061         ct_iocb->cmd_byte_count =
3062             cpu_to_le32(bsg_job->request_payload.payload_len);
3063
3064         avail_dsds = 2;
3065         cur_dsd = ct_iocb->dsd;
3066         index = 0;
3067
3068         for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
3069                 /* Allocate additional continuation packets? */
3070                 if (avail_dsds == 0) {
3071                         /*
3072                          * Five DSDs are available in the Cont.
3073                          * Type 1 IOCB.
3074                          */
3075                         cont_pkt = qla2x00_prep_cont_type1_iocb(
3076                             vha, ha->req_q_map[0]);
3077                         cur_dsd = cont_pkt->dsd;
3078                         avail_dsds = 5;
3079                         entry_count++;
3080                 }
3081
3082                 append_dsd64(&cur_dsd, sg);
3083                 avail_dsds--;
3084         }
3085
3086         index = 0;
3087
3088         for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
3089                 /* Allocate additional continuation packets? */
3090                 if (avail_dsds == 0) {
3091                         /*
3092                         * Five DSDs are available in the Cont.
3093                         * Type 1 IOCB.
3094                                */
3095                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3096                             ha->req_q_map[0]);
3097                         cur_dsd = cont_pkt->dsd;
3098                         avail_dsds = 5;
3099                         entry_count++;
3100                 }
3101
3102                 append_dsd64(&cur_dsd, sg);
3103                 avail_dsds--;
3104         }
3105         ct_iocb->entry_count = entry_count;
3106 }
3107
3108 /*
3109  * qla82xx_start_scsi() - Send a SCSI command to the ISP
3110  * @sp: command to send to the ISP
3111  *
3112  * Returns non-zero if a failure occurred, else zero.
3113  */
3114 int
3115 qla82xx_start_scsi(srb_t *sp)
3116 {
3117         int             nseg;
3118         unsigned long   flags;
3119         struct scsi_cmnd *cmd;
3120         uint32_t        *clr_ptr;
3121         uint32_t        index;
3122         uint32_t        handle;
3123         uint16_t        cnt;
3124         uint16_t        req_cnt;
3125         uint16_t        tot_dsds;
3126         struct device_reg_82xx __iomem *reg;
3127         uint32_t dbval;
3128         uint32_t *fcp_dl;
3129         uint8_t additional_cdb_len;
3130         struct ct6_dsd *ctx;
3131         struct scsi_qla_host *vha = sp->vha;
3132         struct qla_hw_data *ha = vha->hw;
3133         struct req_que *req = NULL;
3134         struct rsp_que *rsp = NULL;
3135
3136         /* Setup device pointers. */
3137         reg = &ha->iobase->isp82;
3138         cmd = GET_CMD_SP(sp);
3139         req = vha->req;
3140         rsp = ha->rsp_q_map[0];
3141
3142         /* So we know we haven't pci_map'ed anything yet */
3143         tot_dsds = 0;
3144
3145         dbval = 0x04 | (ha->portnum << 5);
3146
3147         /* Send marker if required */
3148         if (vha->marker_needed != 0) {
3149                 if (qla2x00_marker(vha, ha->base_qpair,
3150                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
3151                         ql_log(ql_log_warn, vha, 0x300c,
3152                             "qla2x00_marker failed for cmd=%p.\n", cmd);
3153                         return QLA_FUNCTION_FAILED;
3154                 }
3155                 vha->marker_needed = 0;
3156         }
3157
3158         /* Acquire ring specific lock */
3159         spin_lock_irqsave(&ha->hardware_lock, flags);
3160
3161         /* Check for room in outstanding command list. */
3162         handle = req->current_outstanding_cmd;
3163         for (index = 1; index < req->num_outstanding_cmds; index++) {
3164                 handle++;
3165                 if (handle == req->num_outstanding_cmds)
3166                         handle = 1;
3167                 if (!req->outstanding_cmds[handle])
3168                         break;
3169         }
3170         if (index == req->num_outstanding_cmds)
3171                 goto queuing_error;
3172
3173         /* Map the sg table so we have an accurate count of sg entries needed */
3174         if (scsi_sg_count(cmd)) {
3175                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
3176                     scsi_sg_count(cmd), cmd->sc_data_direction);
3177                 if (unlikely(!nseg))
3178                         goto queuing_error;
3179         } else
3180                 nseg = 0;
3181
3182         tot_dsds = nseg;
3183
3184         if (tot_dsds > ql2xshiftctondsd) {
3185                 struct cmd_type_6 *cmd_pkt;
3186                 uint16_t more_dsd_lists = 0;
3187                 struct dsd_dma *dsd_ptr;
3188                 uint16_t i;
3189
3190                 more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
3191                 if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
3192                         ql_dbg(ql_dbg_io, vha, 0x300d,
3193                             "Num of DSD list %d is than %d for cmd=%p.\n",
3194                             more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
3195                             cmd);
3196                         goto queuing_error;
3197                 }
3198
3199                 if (more_dsd_lists <= ha->gbl_dsd_avail)
3200                         goto sufficient_dsds;
3201                 else
3202                         more_dsd_lists -= ha->gbl_dsd_avail;
3203
3204                 for (i = 0; i < more_dsd_lists; i++) {
3205                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
3206                         if (!dsd_ptr) {
3207                                 ql_log(ql_log_fatal, vha, 0x300e,
3208                                     "Failed to allocate memory for dsd_dma "
3209                                     "for cmd=%p.\n", cmd);
3210                                 goto queuing_error;
3211                         }
3212
3213                         dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
3214                                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
3215                         if (!dsd_ptr->dsd_addr) {
3216                                 kfree(dsd_ptr);
3217                                 ql_log(ql_log_fatal, vha, 0x300f,
3218                                     "Failed to allocate memory for dsd_addr "
3219                                     "for cmd=%p.\n", cmd);
3220                                 goto queuing_error;
3221                         }
3222                         list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
3223                         ha->gbl_dsd_avail++;
3224                 }
3225
3226 sufficient_dsds:
3227                 req_cnt = 1;
3228
3229                 if (req->cnt < (req_cnt + 2)) {
3230                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
3231                                 &reg->req_q_out[0]);
3232                         if (req->ring_index < cnt)
3233                                 req->cnt = cnt - req->ring_index;
3234                         else
3235                                 req->cnt = req->length -
3236                                         (req->ring_index - cnt);
3237                         if (req->cnt < (req_cnt + 2))
3238                                 goto queuing_error;
3239                 }
3240
3241                 ctx = sp->u.scmd.ctx =
3242                     mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
3243                 if (!ctx) {
3244                         ql_log(ql_log_fatal, vha, 0x3010,
3245                             "Failed to allocate ctx for cmd=%p.\n", cmd);
3246                         goto queuing_error;
3247                 }
3248
3249                 memset(ctx, 0, sizeof(struct ct6_dsd));
3250                 ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
3251                         GFP_ATOMIC, &ctx->fcp_cmnd_dma);
3252                 if (!ctx->fcp_cmnd) {
3253                         ql_log(ql_log_fatal, vha, 0x3011,
3254                             "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
3255                         goto queuing_error;
3256                 }
3257
3258                 /* Initialize the DSD list and dma handle */
3259                 INIT_LIST_HEAD(&ctx->dsd_list);
3260                 ctx->dsd_use_cnt = 0;
3261
3262                 if (cmd->cmd_len > 16) {
3263                         additional_cdb_len = cmd->cmd_len - 16;
3264                         if ((cmd->cmd_len % 4) != 0) {
3265                                 /* SCSI command bigger than 16 bytes must be
3266                                  * multiple of 4
3267                                  */
3268                                 ql_log(ql_log_warn, vha, 0x3012,
3269                                     "scsi cmd len %d not multiple of 4 "
3270                                     "for cmd=%p.\n", cmd->cmd_len, cmd);
3271                                 goto queuing_error_fcp_cmnd;
3272                         }
3273                         ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
3274                 } else {
3275                         additional_cdb_len = 0;
3276                         ctx->fcp_cmnd_len = 12 + 16 + 4;
3277                 }
3278
3279                 cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
3280                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3281
3282                 /* Zero out remaining portion of packet. */
3283                 /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
3284                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3285                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3286                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3287
3288                 /* Set NPORT-ID and LUN number*/
3289                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3290                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3291                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3292                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3293                 cmd_pkt->vp_index = sp->vha->vp_idx;
3294
3295                 /* Build IOCB segments */
3296                 if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
3297                         goto queuing_error_fcp_cmnd;
3298
3299                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3300                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
3301
3302                 /* build FCP_CMND IU */
3303                 int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
3304                 ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
3305
3306                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
3307                         ctx->fcp_cmnd->additional_cdb_len |= 1;
3308                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
3309                         ctx->fcp_cmnd->additional_cdb_len |= 2;
3310
3311                 /* Populate the FCP_PRIO. */
3312                 if (ha->flags.fcp_prio_enabled)
3313                         ctx->fcp_cmnd->task_attribute |=
3314                             sp->fcport->fcp_prio << 3;
3315
3316                 memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
3317
3318                 fcp_dl = (uint32_t *)(ctx->fcp_cmnd->cdb + 16 +
3319                     additional_cdb_len);
3320                 *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
3321
3322                 cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
3323                 put_unaligned_le64(ctx->fcp_cmnd_dma,
3324                                    &cmd_pkt->fcp_cmnd_dseg_address);
3325
3326                 sp->flags |= SRB_FCP_CMND_DMA_VALID;
3327                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3328                 /* Set total data segment count. */
3329                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3330                 /* Specify response queue number where
3331                  * completion should happen
3332                  */
3333                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3334         } else {
3335                 struct cmd_type_7 *cmd_pkt;
3336
3337                 req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3338                 if (req->cnt < (req_cnt + 2)) {
3339                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
3340                             &reg->req_q_out[0]);
3341                         if (req->ring_index < cnt)
3342                                 req->cnt = cnt - req->ring_index;
3343                         else
3344                                 req->cnt = req->length -
3345                                         (req->ring_index - cnt);
3346                 }
3347                 if (req->cnt < (req_cnt + 2))
3348                         goto queuing_error;
3349
3350                 cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
3351                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3352
3353                 /* Zero out remaining portion of packet. */
3354                 /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3355                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3356                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3357                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3358
3359                 /* Set NPORT-ID and LUN number*/
3360                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3361                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3362                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3363                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3364                 cmd_pkt->vp_index = sp->vha->vp_idx;
3365
3366                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3367                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
3368                     sizeof(cmd_pkt->lun));
3369
3370                 /* Populate the FCP_PRIO. */
3371                 if (ha->flags.fcp_prio_enabled)
3372                         cmd_pkt->task |= sp->fcport->fcp_prio << 3;
3373
3374                 /* Load SCSI command packet. */
3375                 memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
3376                 host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
3377
3378                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3379
3380                 /* Build IOCB segments */
3381                 qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
3382
3383                 /* Set total data segment count. */
3384                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3385                 /* Specify response queue number where
3386                  * completion should happen.
3387                  */
3388                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3389
3390         }
3391         /* Build command packet. */
3392         req->current_outstanding_cmd = handle;
3393         req->outstanding_cmds[handle] = sp;
3394         sp->handle = handle;
3395         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
3396         req->cnt -= req_cnt;
3397         wmb();
3398
3399         /* Adjust ring index. */
3400         req->ring_index++;
3401         if (req->ring_index == req->length) {
3402                 req->ring_index = 0;
3403                 req->ring_ptr = req->ring;
3404         } else
3405                 req->ring_ptr++;
3406
3407         sp->flags |= SRB_DMA_VALID;
3408
3409         /* Set chip new ring index. */
3410         /* write, read and verify logic */
3411         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
3412         if (ql2xdbwr)
3413                 qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
3414         else {
3415                 WRT_REG_DWORD(ha->nxdb_wr_ptr, dbval);
3416                 wmb();
3417                 while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
3418                         WRT_REG_DWORD(ha->nxdb_wr_ptr, dbval);
3419                         wmb();
3420                 }
3421         }
3422
3423         /* Manage unprocessed RIO/ZIO commands in response queue. */
3424         if (vha->flags.process_response_queue &&
3425             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
3426                 qla24xx_process_response_queue(vha, rsp);
3427
3428         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3429         return QLA_SUCCESS;
3430
3431 queuing_error_fcp_cmnd:
3432         dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
3433 queuing_error:
3434         if (tot_dsds)
3435                 scsi_dma_unmap(cmd);
3436
3437         if (sp->u.scmd.ctx) {
3438                 mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
3439                 sp->u.scmd.ctx = NULL;
3440         }
3441         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3442
3443         return QLA_FUNCTION_FAILED;
3444 }
3445
3446 static void
3447 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
3448 {
3449         struct srb_iocb *aio = &sp->u.iocb_cmd;
3450         scsi_qla_host_t *vha = sp->vha;
3451         struct req_que *req = sp->qpair->req;
3452
3453         memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
3454         abt_iocb->entry_type = ABORT_IOCB_TYPE;
3455         abt_iocb->entry_count = 1;
3456         abt_iocb->handle = cpu_to_le32(MAKE_HANDLE(req->id, sp->handle));
3457         if (sp->fcport) {
3458                 abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3459                 abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
3460                 abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
3461                 abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
3462         }
3463         abt_iocb->handle_to_abort =
3464             cpu_to_le32(MAKE_HANDLE(aio->u.abt.req_que_no,
3465                                     aio->u.abt.cmd_hndl));
3466         abt_iocb->vp_index = vha->vp_idx;
3467         abt_iocb->req_que_no = cpu_to_le16(aio->u.abt.req_que_no);
3468         /* Send the command to the firmware */
3469         wmb();
3470 }
3471
3472 static void
3473 qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
3474 {
3475         int i, sz;
3476
3477         mbx->entry_type = MBX_IOCB_TYPE;
3478         mbx->handle = sp->handle;
3479         sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
3480
3481         for (i = 0; i < sz; i++)
3482                 mbx->mb[i] = cpu_to_le16(sp->u.iocb_cmd.u.mbx.out_mb[i]);
3483 }
3484
3485 static void
3486 qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
3487 {
3488         sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
3489         qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
3490         ct_pkt->handle = sp->handle;
3491 }
3492
3493 static void qla2x00_send_notify_ack_iocb(srb_t *sp,
3494         struct nack_to_isp *nack)
3495 {
3496         struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
3497
3498         nack->entry_type = NOTIFY_ACK_TYPE;
3499         nack->entry_count = 1;
3500         nack->ox_id = ntfy->ox_id;
3501
3502         nack->u.isp24.handle = sp->handle;
3503         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3504         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3505                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3506                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3507         }
3508         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3509         nack->u.isp24.status = ntfy->u.isp24.status;
3510         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3511         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3512         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3513         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3514         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3515         nack->u.isp24.srr_flags = 0;
3516         nack->u.isp24.srr_reject_code = 0;
3517         nack->u.isp24.srr_reject_code_expl = 0;
3518         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3519 }
3520
3521 /*
3522  * Build NVME LS request
3523  */
3524 static int
3525 qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
3526 {
3527         struct srb_iocb *nvme;
3528         int     rval = QLA_SUCCESS;
3529
3530         nvme = &sp->u.iocb_cmd;
3531         cmd_pkt->entry_type = PT_LS4_REQUEST;
3532         cmd_pkt->entry_count = 1;
3533         cmd_pkt->control_flags = CF_LS4_ORIGINATOR << CF_LS4_SHIFT;
3534
3535         cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
3536         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3537         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
3538
3539         cmd_pkt->tx_dseg_count = 1;
3540         cmd_pkt->tx_byte_count = nvme->u.nvme.cmd_len;
3541         cmd_pkt->dsd[0].length = nvme->u.nvme.cmd_len;
3542         put_unaligned_le64(nvme->u.nvme.cmd_dma, &cmd_pkt->dsd[0].address);
3543
3544         cmd_pkt->rx_dseg_count = 1;
3545         cmd_pkt->rx_byte_count = nvme->u.nvme.rsp_len;
3546         cmd_pkt->dsd[1].length  = nvme->u.nvme.rsp_len;
3547         put_unaligned_le64(nvme->u.nvme.rsp_dma, &cmd_pkt->dsd[1].address);
3548
3549         return rval;
3550 }
3551
3552 static void
3553 qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
3554 {
3555         int map, pos;
3556
3557         vce->entry_type = VP_CTRL_IOCB_TYPE;
3558         vce->handle = sp->handle;
3559         vce->entry_count = 1;
3560         vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
3561         vce->vp_count = cpu_to_le16(1);
3562
3563         /*
3564          * index map in firmware starts with 1; decrement index
3565          * this is ok as we never use index 0
3566          */
3567         map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
3568         pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
3569         vce->vp_idx_map[map] |= 1 << pos;
3570 }
3571
3572 static void
3573 qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
3574 {
3575         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
3576         logio->control_flags =
3577             cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
3578
3579         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3580         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
3581         logio->port_id[1] = sp->fcport->d_id.b.area;
3582         logio->port_id[2] = sp->fcport->d_id.b.domain;
3583         logio->vp_index = sp->fcport->vha->vp_idx;
3584 }
3585
3586 int
3587 qla2x00_start_sp(srb_t *sp)
3588 {
3589         int rval = QLA_SUCCESS;
3590         scsi_qla_host_t *vha = sp->vha;
3591         struct qla_hw_data *ha = vha->hw;
3592         struct qla_qpair *qp = sp->qpair;
3593         void *pkt;
3594         unsigned long flags;
3595
3596         spin_lock_irqsave(qp->qp_lock_ptr, flags);
3597         pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
3598         if (!pkt) {
3599                 rval = EAGAIN;
3600                 ql_log(ql_log_warn, vha, 0x700c,
3601                     "qla2x00_alloc_iocbs failed.\n");
3602                 goto done;
3603         }
3604
3605         switch (sp->type) {
3606         case SRB_LOGIN_CMD:
3607                 IS_FWI2_CAPABLE(ha) ?
3608                     qla24xx_login_iocb(sp, pkt) :
3609                     qla2x00_login_iocb(sp, pkt);
3610                 break;
3611         case SRB_PRLI_CMD:
3612                 qla24xx_prli_iocb(sp, pkt);
3613                 break;
3614         case SRB_LOGOUT_CMD:
3615                 IS_FWI2_CAPABLE(ha) ?
3616                     qla24xx_logout_iocb(sp, pkt) :
3617                     qla2x00_logout_iocb(sp, pkt);
3618                 break;
3619         case SRB_ELS_CMD_RPT:
3620         case SRB_ELS_CMD_HST:
3621                 qla24xx_els_iocb(sp, pkt);
3622                 break;
3623         case SRB_CT_CMD:
3624                 IS_FWI2_CAPABLE(ha) ?
3625                     qla24xx_ct_iocb(sp, pkt) :
3626                     qla2x00_ct_iocb(sp, pkt);
3627                 break;
3628         case SRB_ADISC_CMD:
3629                 IS_FWI2_CAPABLE(ha) ?
3630                     qla24xx_adisc_iocb(sp, pkt) :
3631                     qla2x00_adisc_iocb(sp, pkt);
3632                 break;
3633         case SRB_TM_CMD:
3634                 IS_QLAFX00(ha) ?
3635                     qlafx00_tm_iocb(sp, pkt) :
3636                     qla24xx_tm_iocb(sp, pkt);
3637                 break;
3638         case SRB_FXIOCB_DCMD:
3639         case SRB_FXIOCB_BCMD:
3640                 qlafx00_fxdisc_iocb(sp, pkt);
3641                 break;
3642         case SRB_NVME_LS:
3643                 qla_nvme_ls(sp, pkt);
3644                 break;
3645         case SRB_ABT_CMD:
3646                 IS_QLAFX00(ha) ?
3647                         qlafx00_abort_iocb(sp, pkt) :
3648                         qla24xx_abort_iocb(sp, pkt);
3649                 break;
3650         case SRB_ELS_DCMD:
3651                 qla24xx_els_logo_iocb(sp, pkt);
3652                 break;
3653         case SRB_CT_PTHRU_CMD:
3654                 qla2x00_ctpthru_cmd_iocb(sp, pkt);
3655                 break;
3656         case SRB_MB_IOCB:
3657                 qla2x00_mb_iocb(sp, pkt);
3658                 break;
3659         case SRB_NACK_PLOGI:
3660         case SRB_NACK_PRLI:
3661         case SRB_NACK_LOGO:
3662                 qla2x00_send_notify_ack_iocb(sp, pkt);
3663                 break;
3664         case SRB_CTRL_VP:
3665                 qla25xx_ctrlvp_iocb(sp, pkt);
3666                 break;
3667         case SRB_PRLO_CMD:
3668                 qla24xx_prlo_iocb(sp, pkt);
3669                 break;
3670         default:
3671                 break;
3672         }
3673
3674         if (sp->start_timer)
3675                 add_timer(&sp->u.iocb_cmd.timer);
3676
3677         wmb();
3678         qla2x00_start_iocbs(vha, qp->req);
3679 done:
3680         spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
3681         return rval;
3682 }
3683
3684 static void
3685 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
3686                                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
3687 {
3688         uint16_t avail_dsds;
3689         struct dsd64 *cur_dsd;
3690         uint32_t req_data_len = 0;
3691         uint32_t rsp_data_len = 0;
3692         struct scatterlist *sg;
3693         int index;
3694         int entry_count = 1;
3695         struct bsg_job *bsg_job = sp->u.bsg_job;
3696
3697         /*Update entry type to indicate bidir command */
3698         put_unaligned_le32(COMMAND_BIDIRECTIONAL, &cmd_pkt->entry_type);
3699
3700         /* Set the transfer direction, in this set both flags
3701          * Also set the BD_WRAP_BACK flag, firmware will take care
3702          * assigning DID=SID for outgoing pkts.
3703          */
3704         cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3705         cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3706         cmd_pkt->control_flags = cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
3707                                                         BD_WRAP_BACK);
3708
3709         req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
3710         cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
3711         cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
3712         cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
3713
3714         vha->bidi_stats.transfer_bytes += req_data_len;
3715         vha->bidi_stats.io_count++;
3716
3717         vha->qla_stats.output_bytes += req_data_len;
3718         vha->qla_stats.output_requests++;
3719
3720         /* Only one dsd is available for bidirectional IOCB, remaining dsds
3721          * are bundled in continuation iocb
3722          */
3723         avail_dsds = 1;
3724         cur_dsd = &cmd_pkt->fcp_dsd;
3725
3726         index = 0;
3727
3728         for_each_sg(bsg_job->request_payload.sg_list, sg,
3729                                 bsg_job->request_payload.sg_cnt, index) {
3730                 cont_a64_entry_t *cont_pkt;
3731
3732                 /* Allocate additional continuation packets */
3733                 if (avail_dsds == 0) {
3734                         /* Continuation type 1 IOCB can accomodate
3735                          * 5 DSDS
3736                          */
3737                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3738                         cur_dsd = cont_pkt->dsd;
3739                         avail_dsds = 5;
3740                         entry_count++;
3741                 }
3742                 append_dsd64(&cur_dsd, sg);
3743                 avail_dsds--;
3744         }
3745         /* For read request DSD will always goes to continuation IOCB
3746          * and follow the write DSD. If there is room on the current IOCB
3747          * then it is added to that IOCB else new continuation IOCB is
3748          * allocated.
3749          */
3750         for_each_sg(bsg_job->reply_payload.sg_list, sg,
3751                                 bsg_job->reply_payload.sg_cnt, index) {
3752                 cont_a64_entry_t *cont_pkt;
3753
3754                 /* Allocate additional continuation packets */
3755                 if (avail_dsds == 0) {
3756                         /* Continuation type 1 IOCB can accomodate
3757                          * 5 DSDS
3758                          */
3759                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3760                         cur_dsd = cont_pkt->dsd;
3761                         avail_dsds = 5;
3762                         entry_count++;
3763                 }
3764                 append_dsd64(&cur_dsd, sg);
3765                 avail_dsds--;
3766         }
3767         /* This value should be same as number of IOCB required for this cmd */
3768         cmd_pkt->entry_count = entry_count;
3769 }
3770
3771 int
3772 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
3773 {
3774
3775         struct qla_hw_data *ha = vha->hw;
3776         unsigned long flags;
3777         uint32_t handle;
3778         uint32_t index;
3779         uint16_t req_cnt;
3780         uint16_t cnt;
3781         uint32_t *clr_ptr;
3782         struct cmd_bidir *cmd_pkt = NULL;
3783         struct rsp_que *rsp;
3784         struct req_que *req;
3785         int rval = EXT_STATUS_OK;
3786
3787         rval = QLA_SUCCESS;
3788
3789         rsp = ha->rsp_q_map[0];
3790         req = vha->req;
3791
3792         /* Send marker if required */
3793         if (vha->marker_needed != 0) {
3794                 if (qla2x00_marker(vha, ha->base_qpair,
3795                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
3796                         return EXT_STATUS_MAILBOX;
3797                 vha->marker_needed = 0;
3798         }
3799
3800         /* Acquire ring specific lock */
3801         spin_lock_irqsave(&ha->hardware_lock, flags);
3802
3803         /* Check for room in outstanding command list. */
3804         handle = req->current_outstanding_cmd;
3805         for (index = 1; index < req->num_outstanding_cmds; index++) {
3806                 handle++;
3807                 if (handle == req->num_outstanding_cmds)
3808                         handle = 1;
3809                 if (!req->outstanding_cmds[handle])
3810                         break;
3811         }
3812
3813         if (index == req->num_outstanding_cmds) {
3814                 rval = EXT_STATUS_BUSY;
3815                 goto queuing_error;
3816         }
3817
3818         /* Calculate number of IOCB required */
3819         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3820
3821         /* Check for room on request queue. */
3822         if (req->cnt < req_cnt + 2) {
3823                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
3824                     RD_REG_DWORD_RELAXED(req->req_q_out);
3825                 if  (req->ring_index < cnt)
3826                         req->cnt = cnt - req->ring_index;
3827                 else
3828                         req->cnt = req->length -
3829                                 (req->ring_index - cnt);
3830         }
3831         if (req->cnt < req_cnt + 2) {
3832                 rval = EXT_STATUS_BUSY;
3833                 goto queuing_error;
3834         }
3835
3836         cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
3837         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3838
3839         /* Zero out remaining portion of packet. */
3840         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3841         clr_ptr = (uint32_t *)cmd_pkt + 2;
3842         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3843
3844         /* Set NPORT-ID  (of vha)*/
3845         cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
3846         cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
3847         cmd_pkt->port_id[1] = vha->d_id.b.area;
3848         cmd_pkt->port_id[2] = vha->d_id.b.domain;
3849
3850         qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
3851         cmd_pkt->entry_status = (uint8_t) rsp->id;
3852         /* Build command packet. */
3853         req->current_outstanding_cmd = handle;
3854         req->outstanding_cmds[handle] = sp;
3855         sp->handle = handle;
3856         req->cnt -= req_cnt;
3857
3858         /* Send the command to the firmware */
3859         wmb();
3860         qla2x00_start_iocbs(vha, req);
3861 queuing_error:
3862         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3863         return rval;
3864 }