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         *((uint32_t *)(&cont_pkt->entry_type)) = cpu_to_le32(CONTINUE_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         *((uint32_t *)(&cont_pkt->entry_type)) = IS_QLAFX00(vha->hw) ?
 140             cpu_to_le32(CONTINUE_A64_TYPE_FX00) :
 141             cpu_to_le32(CONTINUE_A64_TYPE);
 142
 143         return (cont_pkt);
 144 }
 145
 146 inline int
 147 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 148 {
 149         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 150         uint8_t guard = scsi_host_get_guard(cmd->device->host);
 151
 152         /* We always use DIFF Bundling for best performance */
 153         *fw_prot_opts = 0;
 154
 155         /* Translate SCSI opcode to a protection opcode */
 156         switch (scsi_get_prot_op(cmd)) {
 157         case SCSI_PROT_READ_STRIP:
 158                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 159                 break;
 160         case SCSI_PROT_WRITE_INSERT:
 161                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 162                 break;
 163         case SCSI_PROT_READ_INSERT:
 164                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 165                 break;
 166         case SCSI_PROT_WRITE_STRIP:
 167                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 168                 break;
 169         case SCSI_PROT_READ_PASS:
 170         case SCSI_PROT_WRITE_PASS:
 171                 if (guard & SHOST_DIX_GUARD_IP)
 172                         *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
 173                 else
 174                         *fw_prot_opts |= PO_MODE_DIF_PASS;
 175                 break;
 176         default:        /* Normal Request */
 177                 *fw_prot_opts |= PO_MODE_DIF_PASS;
 178                 break;
 179         }
 180
 181         return scsi_prot_sg_count(cmd);
 182 }
 183
 184 /*
 185  * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 186  * capable IOCB types.
 187  *
 188  * @sp: SRB command to process
 189  * @cmd_pkt: Command type 2 IOCB
 190  * @tot_dsds: Total number of segments to transfer
 191  */
 192 void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
 193     uint16_t tot_dsds)
 194 {
 195         uint16_t        avail_dsds;
 196         uint32_t        *cur_dsd;
 197         scsi_qla_host_t *vha;
 198         struct scsi_cmnd *cmd;
 199         struct scatterlist *sg;
 200         int i;
 201
 202         cmd = GET_CMD_SP(sp);
 203
 204         /* Update entry type to indicate Command Type 2 IOCB */
 205         *((uint32_t *)(&cmd_pkt->entry_type)) =
 206             cpu_to_le32(COMMAND_TYPE);
 207
 208         /* No data transfer */
 209         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 210                 cmd_pkt->byte_count = cpu_to_le32(0);
 211                 return;
 212         }
 213
 214         vha = sp->vha;
 215         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 216
 217         /* Three DSDs are available in the Command Type 2 IOCB */
 218         avail_dsds = 3;
 219         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 220
 221         /* Load data segments */
 222         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 223                 cont_entry_t *cont_pkt;
 224
 225                 /* Allocate additional continuation packets? */
 226                 if (avail_dsds == 0) {
 227                         /*
 228                          * Seven DSDs are available in the Continuation
 229                          * Type 0 IOCB.
 230                          */
 231                         cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
 232                         cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
 233                         avail_dsds = 7;
 234                 }
 235
 236                 *cur_dsd++ = cpu_to_le32(sg_dma_address(sg));
 237                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 238                 avail_dsds--;
 239         }
 240 }
 241
 242 /**
 243  * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 244  * capable IOCB types.
 245  *
 246  * @sp: SRB command to process
 247  * @cmd_pkt: Command type 3 IOCB
 248  * @tot_dsds: Total number of segments to transfer
 249  */
 250 void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
 251     uint16_t tot_dsds)
 252 {
 253         uint16_t        avail_dsds;
 254         uint32_t        *cur_dsd;
 255         scsi_qla_host_t *vha;
 256         struct scsi_cmnd *cmd;
 257         struct scatterlist *sg;
 258         int i;
 259
 260         cmd = GET_CMD_SP(sp);
 261
 262         /* Update entry type to indicate Command Type 3 IOCB */
 263         *((uint32_t *)(&cmd_pkt->entry_type)) = cpu_to_le32(COMMAND_A64_TYPE);
 264
 265         /* No data transfer */
 266         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 267                 cmd_pkt->byte_count = cpu_to_le32(0);
 268                 return;
 269         }
 270
 271         vha = sp->vha;
 272         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 273
 274         /* Two DSDs are available in the Command Type 3 IOCB */
 275         avail_dsds = 2;
 276         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 277
 278         /* Load data segments */
 279         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 280                 dma_addr_t      sle_dma;
 281                 cont_a64_entry_t *cont_pkt;
 282
 283                 /* Allocate additional continuation packets? */
 284                 if (avail_dsds == 0) {
 285                         /*
 286                          * Five DSDs are available in the Continuation
 287                          * Type 1 IOCB.
 288                          */
 289                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 290                         cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 291                         avail_dsds = 5;
 292                 }
 293
 294                 sle_dma = sg_dma_address(sg);
 295                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 296                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 297                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 298                 avail_dsds--;
 299         }
 300 }
 301
 302 /**
 303  * qla2x00_start_scsi() - Send a SCSI command to the ISP
 304  * @sp: command to send to the ISP
 305  *
 306  * Returns non-zero if a failure occurred, else zero.
 307  */
 308 int
 309 qla2x00_start_scsi(srb_t *sp)
 310 {
 311         int             nseg;
 312         unsigned long   flags;
 313         scsi_qla_host_t *vha;
 314         struct scsi_cmnd *cmd;
 315         uint32_t        *clr_ptr;
 316         uint32_t        index;
 317         uint32_t        handle;
 318         cmd_entry_t     *cmd_pkt;
 319         uint16_t        cnt;
 320         uint16_t        req_cnt;
 321         uint16_t        tot_dsds;
 322         struct device_reg_2xxx __iomem *reg;
 323         struct qla_hw_data *ha;
 324         struct req_que *req;
 325         struct rsp_que *rsp;
 326
 327         /* Setup device pointers. */
 328         vha = sp->vha;
 329         ha = vha->hw;
 330         reg = &ha->iobase->isp;
 331         cmd = GET_CMD_SP(sp);
 332         req = ha->req_q_map[0];
 333         rsp = ha->rsp_q_map[0];
 334         /* So we know we haven't pci_map'ed anything yet */
 335         tot_dsds = 0;
 336
 337         /* Send marker if required */
 338         if (vha->marker_needed != 0) {
 339                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
 340                     QLA_SUCCESS) {
 341                         return (QLA_FUNCTION_FAILED);
 342                 }
 343                 vha->marker_needed = 0;
 344         }
 345
 346         /* Acquire ring specific lock */
 347         spin_lock_irqsave(&ha->hardware_lock, flags);
 348
 349         /* Check for room in outstanding command list. */
 350         handle = req->current_outstanding_cmd;
 351         for (index = 1; index < req->num_outstanding_cmds; index++) {
 352                 handle++;
 353                 if (handle == req->num_outstanding_cmds)
 354                         handle = 1;
 355                 if (!req->outstanding_cmds[handle])
 356                         break;
 357         }
 358         if (index == req->num_outstanding_cmds)
 359                 goto queuing_error;
 360
 361         /* Map the sg table so we have an accurate count of sg entries needed */
 362         if (scsi_sg_count(cmd)) {
 363                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
 364                     scsi_sg_count(cmd), cmd->sc_data_direction);
 365                 if (unlikely(!nseg))
 366                         goto queuing_error;
 367         } else
 368                 nseg = 0;
 369
 370         tot_dsds = nseg;
 371
 372         /* Calculate the number of request entries needed. */
 373         req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
 374         if (req->cnt < (req_cnt + 2)) {
 375                 cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
 376                 if (req->ring_index < cnt)
 377                         req->cnt = cnt - req->ring_index;
 378                 else
 379                         req->cnt = req->length -
 380                             (req->ring_index - cnt);
 381                 /* If still no head room then bail out */
 382                 if (req->cnt < (req_cnt + 2))
 383                         goto queuing_error;
 384         }
 385
 386         /* Build command packet */
 387         req->current_outstanding_cmd = handle;
 388         req->outstanding_cmds[handle] = sp;
 389         sp->handle = handle;
 390         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
 391         req->cnt -= req_cnt;
 392
 393         cmd_pkt = (cmd_entry_t *)req->ring_ptr;
 394         cmd_pkt->handle = handle;
 395         /* Zero out remaining portion of packet. */
 396         clr_ptr = (uint32_t *)cmd_pkt + 2;
 397         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 398         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 399
 400         /* Set target ID and LUN number*/
 401         SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
 402         cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
 403         cmd_pkt->control_flags = cpu_to_le16(CF_SIMPLE_TAG);
 404
 405         /* Load SCSI command packet. */
 406         memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
 407         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 408
 409         /* Build IOCB segments */
 410         ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 411
 412         /* Set total data segment count. */
 413         cmd_pkt->entry_count = (uint8_t)req_cnt;
 414         wmb();
 415
 416         /* Adjust ring index. */
 417         req->ring_index++;
 418         if (req->ring_index == req->length) {
 419                 req->ring_index = 0;
 420                 req->ring_ptr = req->ring;
 421         } else
 422                 req->ring_ptr++;
 423
 424         sp->flags |= SRB_DMA_VALID;
 425
 426         /* Set chip new ring index. */
 427         WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index);
 428         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
 429
 430         /* Manage unprocessed RIO/ZIO commands in response queue. */
 431         if (vha->flags.process_response_queue &&
 432             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 433                 qla2x00_process_response_queue(rsp);
 434
 435         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 436         return (QLA_SUCCESS);
 437
 438 queuing_error:
 439         if (tot_dsds)
 440                 scsi_dma_unmap(cmd);
 441
 442         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 443
 444         return (QLA_FUNCTION_FAILED);
 445 }
 446
 447 /**
 448  * qla2x00_start_iocbs() - Execute the IOCB command
 449  * @vha: HA context
 450  * @req: request queue
 451  */
 452 void
 453 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 454 {
 455         struct qla_hw_data *ha = vha->hw;
 456         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
 457
 458         if (IS_P3P_TYPE(ha)) {
 459                 qla82xx_start_iocbs(vha);
 460         } else {
 461                 /* Adjust ring index. */
 462                 req->ring_index++;
 463                 if (req->ring_index == req->length) {
 464                         req->ring_index = 0;
 465                         req->ring_ptr = req->ring;
 466                 } else
 467                         req->ring_ptr++;
 468
 469                 /* Set chip new ring index. */
 470                 if (ha->mqenable || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
 471                         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 472                 } else if (IS_QLA83XX(ha)) {
 473                         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 474                         RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
 475                 } else if (IS_QLAFX00(ha)) {
 476                         WRT_REG_DWORD(&reg->ispfx00.req_q_in, req->ring_index);
 477                         RD_REG_DWORD_RELAXED(&reg->ispfx00.req_q_in);
 478                         QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
 479                 } else if (IS_FWI2_CAPABLE(ha)) {
 480                         WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
 481                         RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
 482                 } else {
 483                         WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
 484                                 req->ring_index);
 485                         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
 486                 }
 487         }
 488 }
 489
 490 /**
 491  * qla2x00_marker() - Send a marker IOCB to the firmware.
 492  * @vha: HA context
 493  * @qpair: queue pair pointer
 494  * @loop_id: loop ID
 495  * @lun: LUN
 496  * @type: marker modifier
 497  *
 498  * Can be called from both normal and interrupt context.
 499  *
 500  * Returns non-zero if a failure occurred, else zero.
 501  */
 502 static int
 503 __qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 504     uint16_t loop_id, uint64_t lun, uint8_t type)
 505 {
 506         mrk_entry_t *mrk;
 507         struct mrk_entry_24xx *mrk24 = NULL;
 508         struct req_que *req = qpair->req;
 509         struct qla_hw_data *ha = vha->hw;
 510         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 511
 512         mrk = (mrk_entry_t *)__qla2x00_alloc_iocbs(qpair, NULL);
 513         if (mrk == NULL) {
 514                 ql_log(ql_log_warn, base_vha, 0x3026,
 515                     "Failed to allocate Marker IOCB.\n");
 516
 517                 return (QLA_FUNCTION_FAILED);
 518         }
 519
 520         mrk->entry_type = MARKER_TYPE;
 521         mrk->modifier = type;
 522         if (type != MK_SYNC_ALL) {
 523                 if (IS_FWI2_CAPABLE(ha)) {
 524                         mrk24 = (struct mrk_entry_24xx *) mrk;
 525                         mrk24->nport_handle = cpu_to_le16(loop_id);
 526                         int_to_scsilun(lun, (struct scsi_lun *)&mrk24->lun);
 527                         host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
 528                         mrk24->vp_index = vha->vp_idx;
 529                         mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
 530                 } else {
 531                         SET_TARGET_ID(ha, mrk->target, loop_id);
 532                         mrk->lun = cpu_to_le16((uint16_t)lun);
 533                 }
 534         }
 535         wmb();
 536
 537         qla2x00_start_iocbs(vha, req);
 538
 539         return (QLA_SUCCESS);
 540 }
 541
 542 int
 543 qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 544     uint16_t loop_id, uint64_t lun, uint8_t type)
 545 {
 546         int ret;
 547         unsigned long flags = 0;
 548
 549         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
 550         ret = __qla2x00_marker(vha, qpair, loop_id, lun, type);
 551         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
 552
 553         return (ret);
 554 }
 555
 556 /*
 557  * qla2x00_issue_marker
 558  *
 559  * Issue marker
 560  * Caller CAN have hardware lock held as specified by ha_locked parameter.
 561  * Might release it, then reaquire.
 562  */
 563 int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 564 {
 565         if (ha_locked) {
 566                 if (__qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 567                                         MK_SYNC_ALL) != QLA_SUCCESS)
 568                         return QLA_FUNCTION_FAILED;
 569         } else {
 570                 if (qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 571                                         MK_SYNC_ALL) != QLA_SUCCESS)
 572                         return QLA_FUNCTION_FAILED;
 573         }
 574         vha->marker_needed = 0;
 575
 576         return QLA_SUCCESS;
 577 }
 578
 579 static inline int
 580 qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
 581         uint16_t tot_dsds)
 582 {
 583         uint32_t *cur_dsd = NULL;
 584         scsi_qla_host_t *vha;
 585         struct qla_hw_data *ha;
 586         struct scsi_cmnd *cmd;
 587         struct  scatterlist *cur_seg;
 588         uint32_t *dsd_seg;
 589         void *next_dsd;
 590         uint8_t avail_dsds;
 591         uint8_t first_iocb = 1;
 592         uint32_t dsd_list_len;
 593         struct dsd_dma *dsd_ptr;
 594         struct ct6_dsd *ctx;
 595
 596         cmd = GET_CMD_SP(sp);
 597
 598         /* Update entry type to indicate Command Type 3 IOCB */
 599         *((uint32_t *)(&cmd_pkt->entry_type)) = cpu_to_le32(COMMAND_TYPE_6);
 600
 601         /* No data transfer */
 602         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 603                 cmd_pkt->byte_count = cpu_to_le32(0);
 604                 return 0;
 605         }
 606
 607         vha = sp->vha;
 608         ha = vha->hw;
 609
 610         /* Set transfer direction */
 611         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 612                 cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
 613                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 614                 vha->qla_stats.output_requests++;
 615         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 616                 cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
 617                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 618                 vha->qla_stats.input_requests++;
 619         }
 620
 621         cur_seg = scsi_sglist(cmd);
 622         ctx = GET_CMD_CTX_SP(sp);
 623
 624         while (tot_dsds) {
 625                 avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
 626                     QLA_DSDS_PER_IOCB : tot_dsds;
 627                 tot_dsds -= avail_dsds;
 628                 dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
 629
 630                 dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
 631                     struct dsd_dma, list);
 632                 next_dsd = dsd_ptr->dsd_addr;
 633                 list_del(&dsd_ptr->list);
 634                 ha->gbl_dsd_avail--;
 635                 list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
 636                 ctx->dsd_use_cnt++;
 637                 ha->gbl_dsd_inuse++;
 638
 639                 if (first_iocb) {
 640                         first_iocb = 0;
 641                         dsd_seg = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
 642                         *dsd_seg++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
 643                         *dsd_seg++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
 644                         cmd_pkt->fcp_data_dseg_len = cpu_to_le32(dsd_list_len);
 645                 } else {
 646                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
 647                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
 648                         *cur_dsd++ = cpu_to_le32(dsd_list_len);
 649                 }
 650                 cur_dsd = (uint32_t *)next_dsd;
 651                 while (avail_dsds) {
 652                         dma_addr_t      sle_dma;
 653
 654                         sle_dma = sg_dma_address(cur_seg);
 655                         *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 656                         *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 657                         *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
 658                         cur_seg = sg_next(cur_seg);
 659                         avail_dsds--;
 660                 }
 661         }
 662
 663         /* Null termination */
 664         *cur_dsd++ =  0;
 665         *cur_dsd++ = 0;
 666         *cur_dsd++ = 0;
 667         cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
 668         return 0;
 669 }
 670
 671 /*
 672  * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 673  * for Command Type 6.
 674  *
 675  * @dsds: number of data segment decriptors needed
 676  *
 677  * Returns the number of dsd list needed to store @dsds.
 678  */
 679 static inline uint16_t
 680 qla24xx_calc_dsd_lists(uint16_t dsds)
 681 {
 682         uint16_t dsd_lists = 0;
 683
 684         dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
 685         if (dsds % QLA_DSDS_PER_IOCB)
 686                 dsd_lists++;
 687         return dsd_lists;
 688 }
 689
 690
 691 /**
 692  * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 693  * IOCB types.
 694  *
 695  * @sp: SRB command to process
 696  * @cmd_pkt: Command type 3 IOCB
 697  * @tot_dsds: Total number of segments to transfer
 698  * @req: pointer to request queue
 699  */
 700 inline void
 701 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 702         uint16_t tot_dsds, struct req_que *req)
 703 {
 704         uint16_t        avail_dsds;
 705         uint32_t        *cur_dsd;
 706         scsi_qla_host_t *vha;
 707         struct scsi_cmnd *cmd;
 708         struct scatterlist *sg;
 709         int i;
 710
 711         cmd = GET_CMD_SP(sp);
 712
 713         /* Update entry type to indicate Command Type 3 IOCB */
 714         *((uint32_t *)(&cmd_pkt->entry_type)) = cpu_to_le32(COMMAND_TYPE_7);
 715
 716         /* No data transfer */
 717         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 718                 cmd_pkt->byte_count = cpu_to_le32(0);
 719                 return;
 720         }
 721
 722         vha = sp->vha;
 723
 724         /* Set transfer direction */
 725         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 726                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_WRITE_DATA);
 727                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 728                 vha->qla_stats.output_requests++;
 729         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 730                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_READ_DATA);
 731                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 732                 vha->qla_stats.input_requests++;
 733         }
 734
 735         /* One DSD is available in the Command Type 3 IOCB */
 736         avail_dsds = 1;
 737         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 738
 739         /* Load data segments */
 740
 741         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 742                 dma_addr_t      sle_dma;
 743                 cont_a64_entry_t *cont_pkt;
 744
 745                 /* Allocate additional continuation packets? */
 746                 if (avail_dsds == 0) {
 747                         /*
 748                          * Five DSDs are available in the Continuation
 749                          * Type 1 IOCB.
 750                          */
 751                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
 752                         cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 753                         avail_dsds = 5;
 754                 }
 755
 756                 sle_dma = sg_dma_address(sg);
 757                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 758                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 759                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 760                 avail_dsds--;
 761         }
 762 }
 763
 764 struct fw_dif_context {
 765         uint32_t ref_tag;
 766         uint16_t app_tag;
 767         uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
 768         uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
 769 };
 770
 771 /*
 772  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 773  *
 774  */
 775 static inline void
 776 qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 777     unsigned int protcnt)
 778 {
 779         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 780
 781         switch (scsi_get_prot_type(cmd)) {
 782         case SCSI_PROT_DIF_TYPE0:
 783                 /*
 784                  * No check for ql2xenablehba_err_chk, as it would be an
 785                  * I/O error if hba tag generation is not done.
 786                  */
 787                 pkt->ref_tag = cpu_to_le32((uint32_t)
 788                     (0xffffffff & scsi_get_lba(cmd)));
 789
 790                 if (!qla2x00_hba_err_chk_enabled(sp))
 791                         break;
 792
 793                 pkt->ref_tag_mask[0] = 0xff;
 794                 pkt->ref_tag_mask[1] = 0xff;
 795                 pkt->ref_tag_mask[2] = 0xff;
 796                 pkt->ref_tag_mask[3] = 0xff;
 797                 break;
 798
 799         /*
 800          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
 801          * match LBA in CDB + N
 802          */
 803         case SCSI_PROT_DIF_TYPE2:
 804                 pkt->app_tag = cpu_to_le16(0);
 805                 pkt->app_tag_mask[0] = 0x0;
 806                 pkt->app_tag_mask[1] = 0x0;
 807
 808                 pkt->ref_tag = cpu_to_le32((uint32_t)
 809                     (0xffffffff & scsi_get_lba(cmd)));
 810
 811                 if (!qla2x00_hba_err_chk_enabled(sp))
 812                         break;
 813
 814                 /* enable ALL bytes of the ref tag */
 815                 pkt->ref_tag_mask[0] = 0xff;
 816                 pkt->ref_tag_mask[1] = 0xff;
 817                 pkt->ref_tag_mask[2] = 0xff;
 818                 pkt->ref_tag_mask[3] = 0xff;
 819                 break;
 820
 821         /* For Type 3 protection: 16 bit GUARD only */
 822         case SCSI_PROT_DIF_TYPE3:
 823                 pkt->ref_tag_mask[0] = pkt->ref_tag_mask[1] =
 824                         pkt->ref_tag_mask[2] = pkt->ref_tag_mask[3] =
 825                                                                 0x00;
 826                 break;
 827
 828         /*
 829          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
 830          * 16 bit app tag.
 831          */
 832         case SCSI_PROT_DIF_TYPE1:
 833                 pkt->ref_tag = cpu_to_le32((uint32_t)
 834                     (0xffffffff & scsi_get_lba(cmd)));
 835                 pkt->app_tag = cpu_to_le16(0);
 836                 pkt->app_tag_mask[0] = 0x0;
 837                 pkt->app_tag_mask[1] = 0x0;
 838
 839                 if (!qla2x00_hba_err_chk_enabled(sp))
 840                         break;
 841
 842                 /* enable ALL bytes of the ref tag */
 843                 pkt->ref_tag_mask[0] = 0xff;
 844                 pkt->ref_tag_mask[1] = 0xff;
 845                 pkt->ref_tag_mask[2] = 0xff;
 846                 pkt->ref_tag_mask[3] = 0xff;
 847                 break;
 848         }
 849 }
 850
 851 int
 852 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 853         uint32_t *partial)
 854 {
 855         struct scatterlist *sg;
 856         uint32_t cumulative_partial, sg_len;
 857         dma_addr_t sg_dma_addr;
 858
 859         if (sgx->num_bytes == sgx->tot_bytes)
 860                 return 0;
 861
 862         sg = sgx->cur_sg;
 863         cumulative_partial = sgx->tot_partial;
 864
 865         sg_dma_addr = sg_dma_address(sg);
 866         sg_len = sg_dma_len(sg);
 867
 868         sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 869
 870         if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
 871                 sgx->dma_len = (blk_sz - cumulative_partial);
 872                 sgx->tot_partial = 0;
 873                 sgx->num_bytes += blk_sz;
 874                 *partial = 0;
 875         } else {
 876                 sgx->dma_len = sg_len - sgx->bytes_consumed;
 877                 sgx->tot_partial += sgx->dma_len;
 878                 *partial = 1;
 879         }
 880
 881         sgx->bytes_consumed += sgx->dma_len;
 882
 883         if (sg_len == sgx->bytes_consumed) {
 884                 sg = sg_next(sg);
 885                 sgx->num_sg++;
 886                 sgx->cur_sg = sg;
 887                 sgx->bytes_consumed = 0;
 888         }
 889
 890         return 1;
 891 }
 892
 893 int
 894 qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
 895         uint32_t *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 896 {
 897         void *next_dsd;
 898         uint8_t avail_dsds = 0;
 899         uint32_t dsd_list_len;
 900         struct dsd_dma *dsd_ptr;
 901         struct scatterlist *sg_prot;
 902         uint32_t *cur_dsd = dsd;
 903         uint16_t        used_dsds = tot_dsds;
 904         uint32_t        prot_int; /* protection interval */
 905         uint32_t        partial;
 906         struct qla2_sgx sgx;
 907         dma_addr_t      sle_dma;
 908         uint32_t        sle_dma_len, tot_prot_dma_len = 0;
 909         struct scsi_cmnd *cmd;
 910
 911         memset(&sgx, 0, sizeof(struct qla2_sgx));
 912         if (sp) {
 913                 cmd = GET_CMD_SP(sp);
 914                 prot_int = cmd->device->sector_size;
 915
 916                 sgx.tot_bytes = scsi_bufflen(cmd);
 917                 sgx.cur_sg = scsi_sglist(cmd);
 918                 sgx.sp = sp;
 919
 920                 sg_prot = scsi_prot_sglist(cmd);
 921         } else if (tc) {
 922                 prot_int      = tc->blk_sz;
 923                 sgx.tot_bytes = tc->bufflen;
 924                 sgx.cur_sg    = tc->sg;
 925                 sg_prot       = tc->prot_sg;
 926         } else {
 927                 BUG();
 928                 return 1;
 929         }
 930
 931         while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 932
 933                 sle_dma = sgx.dma_addr;
 934                 sle_dma_len = sgx.dma_len;
 935 alloc_and_fill:
 936                 /* Allocate additional continuation packets? */
 937                 if (avail_dsds == 0) {
 938                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 939                                         QLA_DSDS_PER_IOCB : used_dsds;
 940                         dsd_list_len = (avail_dsds + 1) * 12;
 941                         used_dsds -= avail_dsds;
 942
 943                         /* allocate tracking DS */
 944                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 945                         if (!dsd_ptr)
 946                                 return 1;
 947
 948                         /* allocate new list */
 949                         dsd_ptr->dsd_addr = next_dsd =
 950                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 951                                 &dsd_ptr->dsd_list_dma);
 952
 953                         if (!next_dsd) {
 954                                 /*
 955                                  * Need to cleanup only this dsd_ptr, rest
 956                                  * will be done by sp_free_dma()
 957                                  */
 958                                 kfree(dsd_ptr);
 959                                 return 1;
 960                         }
 961
 962                         if (sp) {
 963                                 list_add_tail(&dsd_ptr->list,
 964                                     &((struct crc_context *)
 965                                             sp->u.scmd.ctx)->dsd_list);
 966
 967                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
 968                         } else {
 969                                 list_add_tail(&dsd_ptr->list,
 970                                     &(tc->ctx->dsd_list));
 971                                 *tc->ctx_dsd_alloced = 1;
 972                         }
 973
 974
 975                         /* add new list to cmd iocb or last list */
 976                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
 977                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
 978                         *cur_dsd++ = dsd_list_len;
 979                         cur_dsd = (uint32_t *)next_dsd;
 980                 }
 981                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 982                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 983                 *cur_dsd++ = cpu_to_le32(sle_dma_len);
 984                 avail_dsds--;
 985
 986                 if (partial == 0) {
 987                         /* Got a full protection interval */
 988                         sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
 989                         sle_dma_len = 8;
 990
 991                         tot_prot_dma_len += sle_dma_len;
 992                         if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
 993                                 tot_prot_dma_len = 0;
 994                                 sg_prot = sg_next(sg_prot);
 995                         }
 996
 997                         partial = 1; /* So as to not re-enter this block */
 998                         goto alloc_and_fill;
 999                 }
1000         }
1001         /* Null termination */
1002         *cur_dsd++ = 0;
1003         *cur_dsd++ = 0;
1004         *cur_dsd++ = 0;
1005         return 0;
1006 }
1007
1008 int
1009 qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, uint32_t *dsd,
1010         uint16_t tot_dsds, struct qla_tc_param *tc)
1011 {
1012         void *next_dsd;
1013         uint8_t avail_dsds = 0;
1014         uint32_t dsd_list_len;
1015         struct dsd_dma *dsd_ptr;
1016         struct scatterlist *sg, *sgl;
1017         uint32_t *cur_dsd = dsd;
1018         int     i;
1019         uint16_t        used_dsds = tot_dsds;
1020         struct scsi_cmnd *cmd;
1021
1022         if (sp) {
1023                 cmd = GET_CMD_SP(sp);
1024                 sgl = scsi_sglist(cmd);
1025         } else if (tc) {
1026                 sgl = tc->sg;
1027         } else {
1028                 BUG();
1029                 return 1;
1030         }
1031
1032
1033         for_each_sg(sgl, sg, tot_dsds, i) {
1034                 dma_addr_t      sle_dma;
1035
1036                 /* Allocate additional continuation packets? */
1037                 if (avail_dsds == 0) {
1038                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1039                                         QLA_DSDS_PER_IOCB : used_dsds;
1040                         dsd_list_len = (avail_dsds + 1) * 12;
1041                         used_dsds -= avail_dsds;
1042
1043                         /* allocate tracking DS */
1044                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
1045                         if (!dsd_ptr)
1046                                 return 1;
1047
1048                         /* allocate new list */
1049                         dsd_ptr->dsd_addr = next_dsd =
1050                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1051                                 &dsd_ptr->dsd_list_dma);
1052
1053                         if (!next_dsd) {
1054                                 /*
1055                                  * Need to cleanup only this dsd_ptr, rest
1056                                  * will be done by sp_free_dma()
1057                                  */
1058                                 kfree(dsd_ptr);
1059                                 return 1;
1060                         }
1061
1062                         if (sp) {
1063                                 list_add_tail(&dsd_ptr->list,
1064                                     &((struct crc_context *)
1065                                             sp->u.scmd.ctx)->dsd_list);
1066
1067                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
1068                         } else {
1069                                 list_add_tail(&dsd_ptr->list,
1070                                     &(tc->ctx->dsd_list));
1071                                 *tc->ctx_dsd_alloced = 1;
1072                         }
1073
1074                         /* add new list to cmd iocb or last list */
1075                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1076                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1077                         *cur_dsd++ = dsd_list_len;
1078                         cur_dsd = (uint32_t *)next_dsd;
1079                 }
1080                 sle_dma = sg_dma_address(sg);
1081
1082                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
1083                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
1084                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
1085                 avail_dsds--;
1086
1087         }
1088         /* Null termination */
1089         *cur_dsd++ = 0;
1090         *cur_dsd++ = 0;
1091         *cur_dsd++ = 0;
1092         return 0;
1093 }
1094
1095 int
1096 qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
1097     uint32_t *cur_dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1098 {
1099         struct dsd_dma *dsd_ptr = NULL, *dif_dsd, *nxt_dsd;
1100         struct scatterlist *sg, *sgl;
1101         struct crc_context *difctx = NULL;
1102         struct scsi_qla_host *vha;
1103         uint dsd_list_len;
1104         uint avail_dsds = 0;
1105         uint used_dsds = tot_dsds;
1106         bool dif_local_dma_alloc = false;
1107         bool direction_to_device = false;
1108         int i;
1109
1110         if (sp) {
1111                 struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1112                 sgl = scsi_prot_sglist(cmd);
1113                 vha = sp->vha;
1114                 difctx = sp->u.scmd.ctx;
1115                 direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
1116                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1117                   "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
1118                         __func__, cmd, difctx, sp);
1119         } else if (tc) {
1120                 vha = tc->vha;
1121                 sgl = tc->prot_sg;
1122                 difctx = tc->ctx;
1123                 direction_to_device = tc->dma_data_direction == DMA_TO_DEVICE;
1124         } else {
1125                 BUG();
1126                 return 1;
1127         }
1128
1129         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1130             "%s: enter (write=%u)\n", __func__, direction_to_device);
1131
1132         /* if initiator doing write or target doing read */
1133         if (direction_to_device) {
1134                 for_each_sg(sgl, sg, tot_dsds, i) {
1135                         u64 sle_phys = sg_phys(sg);
1136
1137                         /* If SGE addr + len flips bits in upper 32-bits */
1138                         if (MSD(sle_phys + sg->length) ^ MSD(sle_phys)) {
1139                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe022,
1140                                     "%s: page boundary crossing (phys=%llx len=%x)\n",
1141                                     __func__, sle_phys, sg->length);
1142
1143                                 if (difctx) {
1144                                         ha->dif_bundle_crossed_pages++;
1145                                         dif_local_dma_alloc = true;
1146                                 } else {
1147                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1148                                             vha, 0xe022,
1149                                             "%s: difctx pointer is NULL\n",
1150                                             __func__);
1151                                 }
1152                                 break;
1153                         }
1154                 }
1155                 ha->dif_bundle_writes++;
1156         } else {
1157                 ha->dif_bundle_reads++;
1158         }
1159
1160         if (ql2xdifbundlinginternalbuffers)
1161                 dif_local_dma_alloc = direction_to_device;
1162
1163         if (dif_local_dma_alloc) {
1164                 u32 track_difbundl_buf = 0;
1165                 u32 ldma_sg_len = 0;
1166                 u8 ldma_needed = 1;
1167
1168                 difctx->no_dif_bundl = 0;
1169                 difctx->dif_bundl_len = 0;
1170
1171                 /* Track DSD buffers */
1172                 INIT_LIST_HEAD(&difctx->ldif_dsd_list);
1173                 /* Track local DMA buffers */
1174                 INIT_LIST_HEAD(&difctx->ldif_dma_hndl_list);
1175
1176                 for_each_sg(sgl, sg, tot_dsds, i) {
1177                         u32 sglen = sg_dma_len(sg);
1178
1179                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe023,
1180                             "%s: sg[%x] (phys=%llx sglen=%x) ldma_sg_len: %x dif_bundl_len: %x ldma_needed: %x\n",
1181                             __func__, i, (u64)sg_phys(sg), sglen, ldma_sg_len,
1182                             difctx->dif_bundl_len, ldma_needed);
1183
1184                         while (sglen) {
1185                                 u32 xfrlen = 0;
1186
1187                                 if (ldma_needed) {
1188                                         /*
1189                                          * Allocate list item to store
1190                                          * the DMA buffers
1191                                          */
1192                                         dsd_ptr = kzalloc(sizeof(*dsd_ptr),
1193                                             GFP_ATOMIC);
1194                                         if (!dsd_ptr) {
1195                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1196                                                     "%s: failed alloc dsd_ptr\n",
1197                                                     __func__);
1198                                                 return 1;
1199                                         }
1200                                         ha->dif_bundle_kallocs++;
1201
1202                                         /* allocate dma buffer */
1203                                         dsd_ptr->dsd_addr = dma_pool_alloc
1204                                                 (ha->dif_bundl_pool, GFP_ATOMIC,
1205                                                  &dsd_ptr->dsd_list_dma);
1206                                         if (!dsd_ptr->dsd_addr) {
1207                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1208                                                     "%s: failed alloc ->dsd_ptr\n",
1209                                                     __func__);
1210                                                 /*
1211                                                  * need to cleanup only this
1212                                                  * dsd_ptr rest will be done
1213                                                  * by sp_free_dma()
1214                                                  */
1215                                                 kfree(dsd_ptr);
1216                                                 ha->dif_bundle_kallocs--;
1217                                                 return 1;
1218                                         }
1219                                         ha->dif_bundle_dma_allocs++;
1220                                         ldma_needed = 0;
1221                                         difctx->no_dif_bundl++;
1222                                         list_add_tail(&dsd_ptr->list,
1223                                             &difctx->ldif_dma_hndl_list);
1224                                 }
1225
1226                                 /* xfrlen is min of dma pool size and sglen */
1227                                 xfrlen = (sglen >
1228                                    (DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len)) ?
1229                                     DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len :
1230                                     sglen;
1231
1232                                 /* replace with local allocated dma buffer */
1233                                 sg_pcopy_to_buffer(sgl, sg_nents(sgl),
1234                                     dsd_ptr->dsd_addr + ldma_sg_len, xfrlen,
1235                                     difctx->dif_bundl_len);
1236                                 difctx->dif_bundl_len += xfrlen;
1237                                 sglen -= xfrlen;
1238                                 ldma_sg_len += xfrlen;
1239                                 if (ldma_sg_len == DIF_BUNDLING_DMA_POOL_SIZE ||
1240                                     sg_is_last(sg)) {
1241                                         ldma_needed = 1;
1242                                         ldma_sg_len = 0;
1243                                 }
1244                         }
1245                 }
1246
1247                 track_difbundl_buf = used_dsds = difctx->no_dif_bundl;
1248                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe025,
1249                     "dif_bundl_len=%x, no_dif_bundl=%x track_difbundl_buf: %x\n",
1250                     difctx->dif_bundl_len, difctx->no_dif_bundl,
1251                     track_difbundl_buf);
1252
1253                 if (sp)
1254                         sp->flags |= SRB_DIF_BUNDL_DMA_VALID;
1255                 else
1256                         tc->prot_flags = DIF_BUNDL_DMA_VALID;
1257
1258                 list_for_each_entry_safe(dif_dsd, nxt_dsd,
1259                     &difctx->ldif_dma_hndl_list, list) {
1260                         u32 sglen = (difctx->dif_bundl_len >
1261                             DIF_BUNDLING_DMA_POOL_SIZE) ?
1262                             DIF_BUNDLING_DMA_POOL_SIZE : difctx->dif_bundl_len;
1263
1264                         BUG_ON(track_difbundl_buf == 0);
1265
1266                         /* Allocate additional continuation packets? */
1267                         if (avail_dsds == 0) {
1268                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha,
1269                                     0xe024,
1270                                     "%s: adding continuation iocb's\n",
1271                                     __func__);
1272                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1273                                     QLA_DSDS_PER_IOCB : used_dsds;
1274                                 dsd_list_len = (avail_dsds + 1) * 12;
1275                                 used_dsds -= avail_dsds;
1276
1277                                 /* allocate tracking DS */
1278                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1279                                 if (!dsd_ptr) {
1280                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1281                                             "%s: failed alloc dsd_ptr\n",
1282                                             __func__);
1283                                         return 1;
1284                                 }
1285                                 ha->dif_bundle_kallocs++;
1286
1287                                 difctx->no_ldif_dsd++;
1288                                 /* allocate new list */
1289                                 dsd_ptr->dsd_addr =
1290                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1291                                         &dsd_ptr->dsd_list_dma);
1292                                 if (!dsd_ptr->dsd_addr) {
1293                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1294                                             "%s: failed alloc ->dsd_addr\n",
1295                                             __func__);
1296                                         /*
1297                                          * need to cleanup only this dsd_ptr
1298                                          *  rest will be done by sp_free_dma()
1299                                          */
1300                                         kfree(dsd_ptr);
1301                                         ha->dif_bundle_kallocs--;
1302                                         return 1;
1303                                 }
1304                                 ha->dif_bundle_dma_allocs++;
1305
1306                                 if (sp) {
1307                                         list_add_tail(&dsd_ptr->list,
1308                                             &difctx->ldif_dsd_list);
1309                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1310                                 } else {
1311                                         list_add_tail(&dsd_ptr->list,
1312                                             &difctx->ldif_dsd_list);
1313                                         tc->ctx_dsd_alloced = 1;
1314                                 }
1315
1316                                 /* add new list to cmd iocb or last list */
1317                                 *cur_dsd++ =
1318                                     cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1319                                 *cur_dsd++ =
1320                                     cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1321                                 *cur_dsd++ = dsd_list_len;
1322                                 cur_dsd = dsd_ptr->dsd_addr;
1323                         }
1324                         *cur_dsd++ = cpu_to_le32(LSD(dif_dsd->dsd_list_dma));
1325                         *cur_dsd++ = cpu_to_le32(MSD(dif_dsd->dsd_list_dma));
1326                         *cur_dsd++ = cpu_to_le32(sglen);
1327                         avail_dsds--;
1328                         difctx->dif_bundl_len -= sglen;
1329                         track_difbundl_buf--;
1330                 }
1331
1332                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe026,
1333                     "%s: no_ldif_dsd:%x, no_dif_bundl:%x\n", __func__,
1334                         difctx->no_ldif_dsd, difctx->no_dif_bundl);
1335         } else {
1336                 for_each_sg(sgl, sg, tot_dsds, i) {
1337                         dma_addr_t sle_dma;
1338
1339                         /* Allocate additional continuation packets? */
1340                         if (avail_dsds == 0) {
1341                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1342                                     QLA_DSDS_PER_IOCB : used_dsds;
1343                                 dsd_list_len = (avail_dsds + 1) * 12;
1344                                 used_dsds -= avail_dsds;
1345
1346                                 /* allocate tracking DS */
1347                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1348                                 if (!dsd_ptr) {
1349                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1350                                             vha, 0xe027,
1351                                             "%s: failed alloc dsd_dma...\n",
1352                                             __func__);
1353                                         return 1;
1354                                 }
1355
1356                                 /* allocate new list */
1357                                 dsd_ptr->dsd_addr =
1358                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1359                                         &dsd_ptr->dsd_list_dma);
1360                                 if (!dsd_ptr->dsd_addr) {
1361                                         /* need to cleanup only this dsd_ptr */
1362                                         /* rest will be done by sp_free_dma() */
1363                                         kfree(dsd_ptr);
1364                                         return 1;
1365                                 }
1366
1367                                 if (sp) {
1368                                         list_add_tail(&dsd_ptr->list,
1369                                             &difctx->dsd_list);
1370                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1371                                 } else {
1372                                         list_add_tail(&dsd_ptr->list,
1373                                             &difctx->dsd_list);
1374                                         tc->ctx_dsd_alloced = 1;
1375                                 }
1376
1377                                 /* add new list to cmd iocb or last list */
1378                                 *cur_dsd++ =
1379                                     cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1380                                 *cur_dsd++ =
1381                                     cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1382                                 *cur_dsd++ = dsd_list_len;
1383                                 cur_dsd = dsd_ptr->dsd_addr;
1384                         }
1385                         sle_dma = sg_dma_address(sg);
1386                         *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
1387                         *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
1388                         *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
1389                         avail_dsds--;
1390                 }
1391         }
1392         /* Null termination */
1393         *cur_dsd++ = 0;
1394         *cur_dsd++ = 0;
1395         *cur_dsd++ = 0;
1396         return 0;
1397 }
1398 /**
1399  * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
1400  *                                                      Type 6 IOCB types.
1401  *
1402  * @sp: SRB command to process
1403  * @cmd_pkt: Command type 3 IOCB
1404  * @tot_dsds: Total number of segments to transfer
1405  * @tot_prot_dsds: Total number of segments with protection information
1406  * @fw_prot_opts: Protection options to be passed to firmware
1407  */
1408 inline int
1409 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
1410     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
1411 {
1412         uint32_t                *cur_dsd, *fcp_dl;
1413         scsi_qla_host_t         *vha;
1414         struct scsi_cmnd        *cmd;
1415         uint32_t                total_bytes = 0;
1416         uint32_t                data_bytes;
1417         uint32_t                dif_bytes;
1418         uint8_t                 bundling = 1;
1419         uint16_t                blk_size;
1420         struct crc_context      *crc_ctx_pkt = NULL;
1421         struct qla_hw_data      *ha;
1422         uint8_t                 additional_fcpcdb_len;
1423         uint16_t                fcp_cmnd_len;
1424         struct fcp_cmnd         *fcp_cmnd;
1425         dma_addr_t              crc_ctx_dma;
1426
1427         cmd = GET_CMD_SP(sp);
1428
1429         /* Update entry type to indicate Command Type CRC_2 IOCB */
1430         *((uint32_t *)(&cmd_pkt->entry_type)) = cpu_to_le32(COMMAND_TYPE_CRC_2);
1431
1432         vha = sp->vha;
1433         ha = vha->hw;
1434
1435         /* No data transfer */
1436         data_bytes = scsi_bufflen(cmd);
1437         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1438                 cmd_pkt->byte_count = cpu_to_le32(0);
1439                 return QLA_SUCCESS;
1440         }
1441
1442         cmd_pkt->vp_index = sp->vha->vp_idx;
1443
1444         /* Set transfer direction */
1445         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1446                 cmd_pkt->control_flags =
1447                     cpu_to_le16(CF_WRITE_DATA);
1448         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
1449                 cmd_pkt->control_flags =
1450                     cpu_to_le16(CF_READ_DATA);
1451         }
1452
1453         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1454             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
1455             (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
1456             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1457                 bundling = 0;
1458
1459         /* Allocate CRC context from global pool */
1460         crc_ctx_pkt = sp->u.scmd.ctx =
1461             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1462
1463         if (!crc_ctx_pkt)
1464                 goto crc_queuing_error;
1465
1466         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
1467
1468         sp->flags |= SRB_CRC_CTX_DMA_VALID;
1469
1470         /* Set handle */
1471         crc_ctx_pkt->handle = cmd_pkt->handle;
1472
1473         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
1474
1475         qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1476             &crc_ctx_pkt->ref_tag, tot_prot_dsds);
1477
1478         cmd_pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
1479         cmd_pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
1480         cmd_pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
1481
1482         /* Determine SCSI command length -- align to 4 byte boundary */
1483         if (cmd->cmd_len > 16) {
1484                 additional_fcpcdb_len = cmd->cmd_len - 16;
1485                 if ((cmd->cmd_len % 4) != 0) {
1486                         /* SCSI cmd > 16 bytes must be multiple of 4 */
1487                         goto crc_queuing_error;
1488                 }
1489                 fcp_cmnd_len = 12 + cmd->cmd_len + 4;
1490         } else {
1491                 additional_fcpcdb_len = 0;
1492                 fcp_cmnd_len = 12 + 16 + 4;
1493         }
1494
1495         fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
1496
1497         fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
1498         if (cmd->sc_data_direction == DMA_TO_DEVICE)
1499                 fcp_cmnd->additional_cdb_len |= 1;
1500         else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1501                 fcp_cmnd->additional_cdb_len |= 2;
1502
1503         int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1504         memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
1505         cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
1506         cmd_pkt->fcp_cmnd_dseg_address[0] = cpu_to_le32(
1507             LSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
1508         cmd_pkt->fcp_cmnd_dseg_address[1] = cpu_to_le32(
1509             MSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
1510         fcp_cmnd->task_management = 0;
1511         fcp_cmnd->task_attribute = TSK_SIMPLE;
1512
1513         cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
1514
1515         /* Compute dif len and adjust data len to incude protection */
1516         dif_bytes = 0;
1517         blk_size = cmd->device->sector_size;
1518         dif_bytes = (data_bytes / blk_size) * 8;
1519
1520         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1521         case SCSI_PROT_READ_INSERT:
1522         case SCSI_PROT_WRITE_STRIP:
1523             total_bytes = data_bytes;
1524             data_bytes += dif_bytes;
1525             break;
1526
1527         case SCSI_PROT_READ_STRIP:
1528         case SCSI_PROT_WRITE_INSERT:
1529         case SCSI_PROT_READ_PASS:
1530         case SCSI_PROT_WRITE_PASS:
1531             total_bytes = data_bytes + dif_bytes;
1532             break;
1533         default:
1534             BUG();
1535         }
1536
1537         if (!qla2x00_hba_err_chk_enabled(sp))
1538                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1539         /* HBA error checking enabled */
1540         else if (IS_PI_UNINIT_CAPABLE(ha)) {
1541                 if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
1542                     || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1543                         SCSI_PROT_DIF_TYPE2))
1544                         fw_prot_opts |= BIT_10;
1545                 else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1546                     SCSI_PROT_DIF_TYPE3)
1547                         fw_prot_opts |= BIT_11;
1548         }
1549
1550         if (!bundling) {
1551                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
1552         } else {
1553                 /*
1554                  * Configure Bundling if we need to fetch interlaving
1555                  * protection PCI accesses
1556                  */
1557                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
1558                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
1559                 crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
1560                                                         tot_prot_dsds);
1561                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
1562         }
1563
1564         /* Finish the common fields of CRC pkt */
1565         crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
1566         crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
1567         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
1568         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
1569         /* Fibre channel byte count */
1570         cmd_pkt->byte_count = cpu_to_le32(total_bytes);
1571         fcp_dl = (uint32_t *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
1572             additional_fcpcdb_len);
1573         *fcp_dl = htonl(total_bytes);
1574
1575         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1576                 cmd_pkt->byte_count = cpu_to_le32(0);
1577                 return QLA_SUCCESS;
1578         }
1579         /* Walks data segments */
1580
1581         cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1582
1583         if (!bundling && tot_prot_dsds) {
1584                 if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
1585                         cur_dsd, tot_dsds, NULL))
1586                         goto crc_queuing_error;
1587         } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1588                         (tot_dsds - tot_prot_dsds), NULL))
1589                 goto crc_queuing_error;
1590
1591         if (bundling && tot_prot_dsds) {
1592                 /* Walks dif segments */
1593                 cmd_pkt->control_flags |= cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
1594                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
1595                 if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
1596                                 tot_prot_dsds, NULL))
1597                         goto crc_queuing_error;
1598         }
1599         return QLA_SUCCESS;
1600
1601 crc_queuing_error:
1602         /* Cleanup will be performed by the caller */
1603
1604         return QLA_FUNCTION_FAILED;
1605 }
1606
1607 /**
1608  * qla24xx_start_scsi() - Send a SCSI command to the ISP
1609  * @sp: command to send to the ISP
1610  *
1611  * Returns non-zero if a failure occurred, else zero.
1612  */
1613 int
1614 qla24xx_start_scsi(srb_t *sp)
1615 {
1616         int             nseg;
1617         unsigned long   flags;
1618         uint32_t        *clr_ptr;
1619         uint32_t        index;
1620         uint32_t        handle;
1621         struct cmd_type_7 *cmd_pkt;
1622         uint16_t        cnt;
1623         uint16_t        req_cnt;
1624         uint16_t        tot_dsds;
1625         struct req_que *req = NULL;
1626         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1627         struct scsi_qla_host *vha = sp->vha;
1628         struct qla_hw_data *ha = vha->hw;
1629
1630         /* Setup device pointers. */
1631         req = vha->req;
1632
1633         /* So we know we haven't pci_map'ed anything yet */
1634         tot_dsds = 0;
1635
1636         /* Send marker if required */
1637         if (vha->marker_needed != 0) {
1638                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1639                     QLA_SUCCESS)
1640                         return QLA_FUNCTION_FAILED;
1641                 vha->marker_needed = 0;
1642         }
1643
1644         /* Acquire ring specific lock */
1645         spin_lock_irqsave(&ha->hardware_lock, flags);
1646
1647         /* Check for room in outstanding command list. */
1648         handle = req->current_outstanding_cmd;
1649         for (index = 1; index < req->num_outstanding_cmds; index++) {
1650                 handle++;
1651                 if (handle == req->num_outstanding_cmds)
1652                         handle = 1;
1653                 if (!req->outstanding_cmds[handle])
1654                         break;
1655         }
1656         if (index == req->num_outstanding_cmds)
1657                 goto queuing_error;
1658
1659         /* Map the sg table so we have an accurate count of sg entries needed */
1660         if (scsi_sg_count(cmd)) {
1661                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1662                     scsi_sg_count(cmd), cmd->sc_data_direction);
1663                 if (unlikely(!nseg))
1664                         goto queuing_error;
1665         } else
1666                 nseg = 0;
1667
1668         tot_dsds = nseg;
1669         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1670         if (req->cnt < (req_cnt + 2)) {
1671                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1672                     RD_REG_DWORD_RELAXED(req->req_q_out);
1673                 if (req->ring_index < cnt)
1674                         req->cnt = cnt - req->ring_index;
1675                 else
1676                         req->cnt = req->length -
1677                                 (req->ring_index - cnt);
1678                 if (req->cnt < (req_cnt + 2))
1679                         goto queuing_error;
1680         }
1681
1682         /* Build command packet. */
1683         req->current_outstanding_cmd = handle;
1684         req->outstanding_cmds[handle] = sp;
1685         sp->handle = handle;
1686         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1687         req->cnt -= req_cnt;
1688
1689         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1690         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1691
1692         /* Zero out remaining portion of packet. */
1693         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1694         clr_ptr = (uint32_t *)cmd_pkt + 2;
1695         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1696         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1697
1698         /* Set NPORT-ID and LUN number*/
1699         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1700         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1701         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1702         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1703         cmd_pkt->vp_index = sp->vha->vp_idx;
1704
1705         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1706         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1707
1708         cmd_pkt->task = TSK_SIMPLE;
1709
1710         /* Load SCSI command packet. */
1711         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1712         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1713
1714         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1715
1716         /* Build IOCB segments */
1717         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
1718
1719         /* Set total data segment count. */
1720         cmd_pkt->entry_count = (uint8_t)req_cnt;
1721         wmb();
1722         /* Adjust ring index. */
1723         req->ring_index++;
1724         if (req->ring_index == req->length) {
1725                 req->ring_index = 0;
1726                 req->ring_ptr = req->ring;
1727         } else
1728                 req->ring_ptr++;
1729
1730         sp->flags |= SRB_DMA_VALID;
1731
1732         /* Set chip new ring index. */
1733         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1734
1735         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1736         return QLA_SUCCESS;
1737
1738 queuing_error:
1739         if (tot_dsds)
1740                 scsi_dma_unmap(cmd);
1741
1742         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1743
1744         return QLA_FUNCTION_FAILED;
1745 }
1746
1747 /**
1748  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1749  * @sp: command to send to the ISP
1750  *
1751  * Returns non-zero if a failure occurred, else zero.
1752  */
1753 int
1754 qla24xx_dif_start_scsi(srb_t *sp)
1755 {
1756         int                     nseg;
1757         unsigned long           flags;
1758         uint32_t                *clr_ptr;
1759         uint32_t                index;
1760         uint32_t                handle;
1761         uint16_t                cnt;
1762         uint16_t                req_cnt = 0;
1763         uint16_t                tot_dsds;
1764         uint16_t                tot_prot_dsds;
1765         uint16_t                fw_prot_opts = 0;
1766         struct req_que          *req = NULL;
1767         struct rsp_que          *rsp = NULL;
1768         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1769         struct scsi_qla_host    *vha = sp->vha;
1770         struct qla_hw_data      *ha = vha->hw;
1771         struct cmd_type_crc_2   *cmd_pkt;
1772         uint32_t                status = 0;
1773
1774 #define QDSS_GOT_Q_SPACE        BIT_0
1775
1776         /* Only process protection or >16 cdb in this routine */
1777         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1778                 if (cmd->cmd_len <= 16)
1779                         return qla24xx_start_scsi(sp);
1780         }
1781
1782         /* Setup device pointers. */
1783         req = vha->req;
1784         rsp = req->rsp;
1785
1786         /* So we know we haven't pci_map'ed anything yet */
1787         tot_dsds = 0;
1788
1789         /* Send marker if required */
1790         if (vha->marker_needed != 0) {
1791                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1792                     QLA_SUCCESS)
1793                         return QLA_FUNCTION_FAILED;
1794                 vha->marker_needed = 0;
1795         }
1796
1797         /* Acquire ring specific lock */
1798         spin_lock_irqsave(&ha->hardware_lock, flags);
1799
1800         /* Check for room in outstanding command list. */
1801         handle = req->current_outstanding_cmd;
1802         for (index = 1; index < req->num_outstanding_cmds; index++) {
1803                 handle++;
1804                 if (handle == req->num_outstanding_cmds)
1805                         handle = 1;
1806                 if (!req->outstanding_cmds[handle])
1807                         break;
1808         }
1809
1810         if (index == req->num_outstanding_cmds)
1811                 goto queuing_error;
1812
1813         /* Compute number of required data segments */
1814         /* Map the sg table so we have an accurate count of sg entries needed */
1815         if (scsi_sg_count(cmd)) {
1816                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1817                     scsi_sg_count(cmd), cmd->sc_data_direction);
1818                 if (unlikely(!nseg))
1819                         goto queuing_error;
1820                 else
1821                         sp->flags |= SRB_DMA_VALID;
1822
1823                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1824                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1825                         struct qla2_sgx sgx;
1826                         uint32_t        partial;
1827
1828                         memset(&sgx, 0, sizeof(struct qla2_sgx));
1829                         sgx.tot_bytes = scsi_bufflen(cmd);
1830                         sgx.cur_sg = scsi_sglist(cmd);
1831                         sgx.sp = sp;
1832
1833                         nseg = 0;
1834                         while (qla24xx_get_one_block_sg(
1835                             cmd->device->sector_size, &sgx, &partial))
1836                                 nseg++;
1837                 }
1838         } else
1839                 nseg = 0;
1840
1841         /* number of required data segments */
1842         tot_dsds = nseg;
1843
1844         /* Compute number of required protection segments */
1845         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1846                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1847                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1848                 if (unlikely(!nseg))
1849                         goto queuing_error;
1850                 else
1851                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
1852
1853                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1854                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1855                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1856                 }
1857         } else {
1858                 nseg = 0;
1859         }
1860
1861         req_cnt = 1;
1862         /* Total Data and protection sg segment(s) */
1863         tot_prot_dsds = nseg;
1864         tot_dsds += nseg;
1865         if (req->cnt < (req_cnt + 2)) {
1866                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1867                     RD_REG_DWORD_RELAXED(req->req_q_out);
1868                 if (req->ring_index < cnt)
1869                         req->cnt = cnt - req->ring_index;
1870                 else
1871                         req->cnt = req->length -
1872                                 (req->ring_index - cnt);
1873                 if (req->cnt < (req_cnt + 2))
1874                         goto queuing_error;
1875         }
1876
1877         status |= QDSS_GOT_Q_SPACE;
1878
1879         /* Build header part of command packet (excluding the OPCODE). */
1880         req->current_outstanding_cmd = handle;
1881         req->outstanding_cmds[handle] = sp;
1882         sp->handle = handle;
1883         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1884         req->cnt -= req_cnt;
1885
1886         /* Fill-in common area */
1887         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1888         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1889
1890         clr_ptr = (uint32_t *)cmd_pkt + 2;
1891         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1892
1893         /* Set NPORT-ID and LUN number*/
1894         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1895         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1896         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1897         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1898
1899         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1900         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1901
1902         /* Total Data and protection segment(s) */
1903         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1904
1905         /* Build IOCB segments and adjust for data protection segments */
1906         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1907             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1908                 QLA_SUCCESS)
1909                 goto queuing_error;
1910
1911         cmd_pkt->entry_count = (uint8_t)req_cnt;
1912         /* Specify response queue number where completion should happen */
1913         cmd_pkt->entry_status = (uint8_t) rsp->id;
1914         cmd_pkt->timeout = cpu_to_le16(0);
1915         wmb();
1916
1917         /* Adjust ring index. */
1918         req->ring_index++;
1919         if (req->ring_index == req->length) {
1920                 req->ring_index = 0;
1921                 req->ring_ptr = req->ring;
1922         } else
1923                 req->ring_ptr++;
1924
1925         /* Set chip new ring index. */
1926         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1927
1928         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1929
1930         return QLA_SUCCESS;
1931
1932 queuing_error:
1933         if (status & QDSS_GOT_Q_SPACE) {
1934                 req->outstanding_cmds[handle] = NULL;
1935                 req->cnt += req_cnt;
1936         }
1937         /* Cleanup will be performed by the caller (queuecommand) */
1938
1939         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1940         return QLA_FUNCTION_FAILED;
1941 }
1942
1943 /**
1944  * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
1945  * @sp: command to send to the ISP
1946  *
1947  * Returns non-zero if a failure occurred, else zero.
1948  */
1949 static int
1950 qla2xxx_start_scsi_mq(srb_t *sp)
1951 {
1952         int             nseg;
1953         unsigned long   flags;
1954         uint32_t        *clr_ptr;
1955         uint32_t        index;
1956         uint32_t        handle;
1957         struct cmd_type_7 *cmd_pkt;
1958         uint16_t        cnt;
1959         uint16_t        req_cnt;
1960         uint16_t        tot_dsds;
1961         struct req_que *req = NULL;
1962         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1963         struct scsi_qla_host *vha = sp->fcport->vha;
1964         struct qla_hw_data *ha = vha->hw;
1965         struct qla_qpair *qpair = sp->qpair;
1966
1967         /* Acquire qpair specific lock */
1968         spin_lock_irqsave(&qpair->qp_lock, flags);
1969
1970         /* Setup qpair pointers */
1971         req = qpair->req;
1972
1973         /* So we know we haven't pci_map'ed anything yet */
1974         tot_dsds = 0;
1975
1976         /* Send marker if required */
1977         if (vha->marker_needed != 0) {
1978                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
1979                     QLA_SUCCESS) {
1980                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
1981                         return QLA_FUNCTION_FAILED;
1982                 }
1983                 vha->marker_needed = 0;
1984         }
1985
1986         /* Check for room in outstanding command list. */
1987         handle = req->current_outstanding_cmd;
1988         for (index = 1; index < req->num_outstanding_cmds; index++) {
1989                 handle++;
1990                 if (handle == req->num_outstanding_cmds)
1991                         handle = 1;
1992                 if (!req->outstanding_cmds[handle])
1993                         break;
1994         }
1995         if (index == req->num_outstanding_cmds)
1996                 goto queuing_error;
1997
1998         /* Map the sg table so we have an accurate count of sg entries needed */
1999         if (scsi_sg_count(cmd)) {
2000                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2001                     scsi_sg_count(cmd), cmd->sc_data_direction);
2002                 if (unlikely(!nseg))
2003                         goto queuing_error;
2004         } else
2005                 nseg = 0;
2006
2007         tot_dsds = nseg;
2008         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2009         if (req->cnt < (req_cnt + 2)) {
2010                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
2011                     RD_REG_DWORD_RELAXED(req->req_q_out);
2012                 if (req->ring_index < cnt)
2013                         req->cnt = cnt - req->ring_index;
2014                 else
2015                         req->cnt = req->length -
2016                                 (req->ring_index - cnt);
2017                 if (req->cnt < (req_cnt + 2))
2018                         goto queuing_error;
2019         }
2020
2021         /* Build command packet. */
2022         req->current_outstanding_cmd = handle;
2023         req->outstanding_cmds[handle] = sp;
2024         sp->handle = handle;
2025         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2026         req->cnt -= req_cnt;
2027
2028         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
2029         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2030
2031         /* Zero out remaining portion of packet. */
2032         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
2033         clr_ptr = (uint32_t *)cmd_pkt + 2;
2034         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2035         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2036
2037         /* Set NPORT-ID and LUN number*/
2038         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2039         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2040         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2041         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2042         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2043
2044         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2045         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2046
2047         cmd_pkt->task = TSK_SIMPLE;
2048
2049         /* Load SCSI command packet. */
2050         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2051         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2052
2053         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2054
2055         /* Build IOCB segments */
2056         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
2057
2058         /* Set total data segment count. */
2059         cmd_pkt->entry_count = (uint8_t)req_cnt;
2060         wmb();
2061         /* Adjust ring index. */
2062         req->ring_index++;
2063         if (req->ring_index == req->length) {
2064                 req->ring_index = 0;
2065                 req->ring_ptr = req->ring;
2066         } else
2067                 req->ring_ptr++;
2068
2069         sp->flags |= SRB_DMA_VALID;
2070
2071         /* Set chip new ring index. */
2072         WRT_REG_DWORD(req->req_q_in, req->ring_index);
2073
2074         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2075         return QLA_SUCCESS;
2076
2077 queuing_error:
2078         if (tot_dsds)
2079                 scsi_dma_unmap(cmd);
2080
2081         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2082
2083         return QLA_FUNCTION_FAILED;
2084 }
2085
2086
2087 /**
2088  * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
2089  * @sp: command to send to the ISP
2090  *
2091  * Returns non-zero if a failure occurred, else zero.
2092  */
2093 int
2094 qla2xxx_dif_start_scsi_mq(srb_t *sp)
2095 {
2096         int                     nseg;
2097         unsigned long           flags;
2098         uint32_t                *clr_ptr;
2099         uint32_t                index;
2100         uint32_t                handle;
2101         uint16_t                cnt;
2102         uint16_t                req_cnt = 0;
2103         uint16_t                tot_dsds;
2104         uint16_t                tot_prot_dsds;
2105         uint16_t                fw_prot_opts = 0;
2106         struct req_que          *req = NULL;
2107         struct rsp_que          *rsp = NULL;
2108         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
2109         struct scsi_qla_host    *vha = sp->fcport->vha;
2110         struct qla_hw_data      *ha = vha->hw;
2111         struct cmd_type_crc_2   *cmd_pkt;
2112         uint32_t                status = 0;
2113         struct qla_qpair        *qpair = sp->qpair;
2114
2115 #define QDSS_GOT_Q_SPACE        BIT_0
2116
2117         /* Check for host side state */
2118         if (!qpair->online) {
2119                 cmd->result = DID_NO_CONNECT << 16;
2120                 return QLA_INTERFACE_ERROR;
2121         }
2122
2123         if (!qpair->difdix_supported &&
2124                 scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2125                 cmd->result = DID_NO_CONNECT << 16;
2126                 return QLA_INTERFACE_ERROR;
2127         }
2128
2129         /* Only process protection or >16 cdb in this routine */
2130         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
2131                 if (cmd->cmd_len <= 16)
2132                         return qla2xxx_start_scsi_mq(sp);
2133         }
2134
2135         spin_lock_irqsave(&qpair->qp_lock, flags);
2136
2137         /* Setup qpair pointers */
2138         rsp = qpair->rsp;
2139         req = qpair->req;
2140
2141         /* So we know we haven't pci_map'ed anything yet */
2142         tot_dsds = 0;
2143
2144         /* Send marker if required */
2145         if (vha->marker_needed != 0) {
2146                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
2147                     QLA_SUCCESS) {
2148                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2149                         return QLA_FUNCTION_FAILED;
2150                 }
2151                 vha->marker_needed = 0;
2152         }
2153
2154         /* Check for room in outstanding command list. */
2155         handle = req->current_outstanding_cmd;
2156         for (index = 1; index < req->num_outstanding_cmds; index++) {
2157                 handle++;
2158                 if (handle == req->num_outstanding_cmds)
2159                         handle = 1;
2160                 if (!req->outstanding_cmds[handle])
2161                         break;
2162         }
2163
2164         if (index == req->num_outstanding_cmds)
2165                 goto queuing_error;
2166
2167         /* Compute number of required data segments */
2168         /* Map the sg table so we have an accurate count of sg entries needed */
2169         if (scsi_sg_count(cmd)) {
2170                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2171                     scsi_sg_count(cmd), cmd->sc_data_direction);
2172                 if (unlikely(!nseg))
2173                         goto queuing_error;
2174                 else
2175                         sp->flags |= SRB_DMA_VALID;
2176
2177                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2178                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2179                         struct qla2_sgx sgx;
2180                         uint32_t        partial;
2181
2182                         memset(&sgx, 0, sizeof(struct qla2_sgx));
2183                         sgx.tot_bytes = scsi_bufflen(cmd);
2184                         sgx.cur_sg = scsi_sglist(cmd);
2185                         sgx.sp = sp;
2186
2187                         nseg = 0;
2188                         while (qla24xx_get_one_block_sg(
2189                             cmd->device->sector_size, &sgx, &partial))
2190                                 nseg++;
2191                 }
2192         } else
2193                 nseg = 0;
2194
2195         /* number of required data segments */
2196         tot_dsds = nseg;
2197
2198         /* Compute number of required protection segments */
2199         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
2200                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
2201                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
2202                 if (unlikely(!nseg))
2203                         goto queuing_error;
2204                 else
2205                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
2206
2207                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2208                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2209                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
2210                 }
2211         } else {
2212                 nseg = 0;
2213         }
2214
2215         req_cnt = 1;
2216         /* Total Data and protection sg segment(s) */
2217         tot_prot_dsds = nseg;
2218         tot_dsds += nseg;
2219         if (req->cnt < (req_cnt + 2)) {
2220                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
2221                     RD_REG_DWORD_RELAXED(req->req_q_out);
2222                 if (req->ring_index < cnt)
2223                         req->cnt = cnt - req->ring_index;
2224                 else
2225                         req->cnt = req->length -
2226                                 (req->ring_index - cnt);
2227                 if (req->cnt < (req_cnt + 2))
2228                         goto queuing_error;
2229         }
2230
2231         status |= QDSS_GOT_Q_SPACE;
2232
2233         /* Build header part of command packet (excluding the OPCODE). */
2234         req->current_outstanding_cmd = handle;
2235         req->outstanding_cmds[handle] = sp;
2236         sp->handle = handle;
2237         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2238         req->cnt -= req_cnt;
2239
2240         /* Fill-in common area */
2241         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
2242         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2243
2244         clr_ptr = (uint32_t *)cmd_pkt + 2;
2245         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2246
2247         /* Set NPORT-ID and LUN number*/
2248         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2249         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2250         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2251         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2252
2253         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2254         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2255
2256         /* Total Data and protection segment(s) */
2257         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2258
2259         /* Build IOCB segments and adjust for data protection segments */
2260         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
2261             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
2262                 QLA_SUCCESS)
2263                 goto queuing_error;
2264
2265         cmd_pkt->entry_count = (uint8_t)req_cnt;
2266         cmd_pkt->timeout = cpu_to_le16(0);
2267         wmb();
2268
2269         /* Adjust ring index. */
2270         req->ring_index++;
2271         if (req->ring_index == req->length) {
2272                 req->ring_index = 0;
2273                 req->ring_ptr = req->ring;
2274         } else
2275                 req->ring_ptr++;
2276
2277         /* Set chip new ring index. */
2278         WRT_REG_DWORD(req->req_q_in, req->ring_index);
2279
2280         /* Manage unprocessed RIO/ZIO commands in response queue. */
2281         if (vha->flags.process_response_queue &&
2282             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2283                 qla24xx_process_response_queue(vha, rsp);
2284
2285         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2286
2287         return QLA_SUCCESS;
2288
2289 queuing_error:
2290         if (status & QDSS_GOT_Q_SPACE) {
2291                 req->outstanding_cmds[handle] = NULL;
2292                 req->cnt += req_cnt;
2293         }
2294         /* Cleanup will be performed by the caller (queuecommand) */
2295
2296         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2297         return QLA_FUNCTION_FAILED;
2298 }
2299
2300 /* Generic Control-SRB manipulation functions. */
2301
2302 /* hardware_lock assumed to be held. */
2303
2304 void *
2305 __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
2306 {
2307         scsi_qla_host_t *vha = qpair->vha;
2308         struct qla_hw_data *ha = vha->hw;
2309         struct req_que *req = qpair->req;
2310         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
2311         uint32_t index, handle;
2312         request_t *pkt;
2313         uint16_t cnt, req_cnt;
2314
2315         pkt = NULL;
2316         req_cnt = 1;
2317         handle = 0;
2318
2319         if (sp && (sp->type != SRB_SCSI_CMD)) {
2320                 /* Adjust entry-counts as needed. */
2321                 req_cnt = sp->iocbs;
2322         }
2323
2324         /* Check for room on request queue. */
2325         if (req->cnt < req_cnt + 2) {
2326                 if (qpair->use_shadow_reg)
2327                         cnt = *req->out_ptr;
2328                 else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
2329                     IS_QLA28XX(ha))
2330                         cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
2331                 else if (IS_P3P_TYPE(ha))
2332                         cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
2333                 else if (IS_FWI2_CAPABLE(ha))
2334                         cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
2335                 else if (IS_QLAFX00(ha))
2336                         cnt = RD_REG_DWORD(&reg->ispfx00.req_q_out);
2337                 else
2338                         cnt = qla2x00_debounce_register(
2339                             ISP_REQ_Q_OUT(ha, &reg->isp));
2340
2341                 if  (req->ring_index < cnt)
2342                         req->cnt = cnt - req->ring_index;
2343                 else
2344                         req->cnt = req->length -
2345                             (req->ring_index - cnt);
2346         }
2347         if (req->cnt < req_cnt + 2)
2348                 goto queuing_error;
2349
2350         if (sp) {
2351                 /* Check for room in outstanding command list. */
2352                 handle = req->current_outstanding_cmd;
2353                 for (index = 1; index < req->num_outstanding_cmds; index++) {
2354                         handle++;
2355                         if (handle == req->num_outstanding_cmds)
2356                                 handle = 1;
2357                         if (!req->outstanding_cmds[handle])
2358                                 break;
2359                 }
2360                 if (index == req->num_outstanding_cmds) {
2361                         ql_log(ql_log_warn, vha, 0x700b,
2362                             "No room on outstanding cmd array.\n");
2363                         goto queuing_error;
2364                 }
2365
2366                 /* Prep command array. */
2367                 req->current_outstanding_cmd = handle;
2368                 req->outstanding_cmds[handle] = sp;
2369                 sp->handle = handle;
2370         }
2371
2372         /* Prep packet */
2373         req->cnt -= req_cnt;
2374         pkt = req->ring_ptr;
2375         memset(pkt, 0, REQUEST_ENTRY_SIZE);
2376         if (IS_QLAFX00(ha)) {
2377                 WRT_REG_BYTE((void __iomem *)&pkt->entry_count, req_cnt);
2378                 WRT_REG_WORD((void __iomem *)&pkt->handle, handle);
2379         } else {
2380                 pkt->entry_count = req_cnt;
2381                 pkt->handle = handle;
2382         }
2383
2384         return pkt;
2385
2386 queuing_error:
2387         qpair->tgt_counters.num_alloc_iocb_failed++;
2388         return pkt;
2389 }
2390
2391 void *
2392 qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
2393 {
2394         scsi_qla_host_t *vha = qpair->vha;
2395
2396         if (qla2x00_reset_active(vha))
2397                 return NULL;
2398
2399         return __qla2x00_alloc_iocbs(qpair, sp);
2400 }
2401
2402 void *
2403 qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
2404 {
2405         return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
2406 }
2407
2408 static void
2409 qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2410 {
2411         struct srb_iocb *lio = &sp->u.iocb_cmd;
2412
2413         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2414         logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2415         if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
2416                 logio->control_flags |= LCF_NVME_PRLI;
2417                 if (sp->vha->flags.nvme_first_burst)
2418                         logio->io_parameter[0] = NVME_PRLI_SP_FIRST_BURST;
2419         }
2420
2421         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2422         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2423         logio->port_id[1] = sp->fcport->d_id.b.area;
2424         logio->port_id[2] = sp->fcport->d_id.b.domain;
2425         logio->vp_index = sp->vha->vp_idx;
2426 }
2427
2428 static void
2429 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2430 {
2431         struct srb_iocb *lio = &sp->u.iocb_cmd;
2432
2433         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2434         if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
2435                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2436         } else {
2437                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2438                 if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
2439                         logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
2440                 if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
2441                         logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
2442         }
2443         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2444         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2445         logio->port_id[1] = sp->fcport->d_id.b.area;
2446         logio->port_id[2] = sp->fcport->d_id.b.domain;
2447         logio->vp_index = sp->vha->vp_idx;
2448 }
2449
2450 static void
2451 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
2452 {
2453         struct qla_hw_data *ha = sp->vha->hw;
2454         struct srb_iocb *lio = &sp->u.iocb_cmd;
2455         uint16_t opts;
2456
2457         mbx->entry_type = MBX_IOCB_TYPE;
2458         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2459         mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
2460         opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
2461         opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
2462         if (HAS_EXTENDED_IDS(ha)) {
2463                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2464                 mbx->mb10 = cpu_to_le16(opts);
2465         } else {
2466                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
2467         }
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 }
2473
2474 static void
2475 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2476 {
2477         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2478         logio->control_flags =
2479             cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
2480         if (!sp->fcport->keep_nport_handle)
2481                 logio->control_flags |= cpu_to_le16(LCF_FREE_NPORT);
2482         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2483         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2484         logio->port_id[1] = sp->fcport->d_id.b.area;
2485         logio->port_id[2] = sp->fcport->d_id.b.domain;
2486         logio->vp_index = sp->vha->vp_idx;
2487 }
2488
2489 static void
2490 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
2491 {
2492         struct qla_hw_data *ha = sp->vha->hw;
2493
2494         mbx->entry_type = MBX_IOCB_TYPE;
2495         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2496         mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
2497         mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
2498             cpu_to_le16(sp->fcport->loop_id):
2499             cpu_to_le16(sp->fcport->loop_id << 8);
2500         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2501         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2502             sp->fcport->d_id.b.al_pa);
2503         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2504         /* Implicit: mbx->mbx10 = 0. */
2505 }
2506
2507 static void
2508 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2509 {
2510         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2511         logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
2512         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2513         logio->vp_index = sp->vha->vp_idx;
2514 }
2515
2516 static void
2517 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
2518 {
2519         struct qla_hw_data *ha = sp->vha->hw;
2520
2521         mbx->entry_type = MBX_IOCB_TYPE;
2522         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2523         mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
2524         if (HAS_EXTENDED_IDS(ha)) {
2525                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2526                 mbx->mb10 = cpu_to_le16(BIT_0);
2527         } else {
2528                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
2529         }
2530         mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
2531         mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
2532         mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2533         mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2534         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2535 }
2536
2537 static void
2538 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2539 {
2540         uint32_t flags;
2541         uint64_t lun;
2542         struct fc_port *fcport = sp->fcport;
2543         scsi_qla_host_t *vha = fcport->vha;
2544         struct qla_hw_data *ha = vha->hw;
2545         struct srb_iocb *iocb = &sp->u.iocb_cmd;
2546         struct req_que *req = vha->req;
2547
2548         flags = iocb->u.tmf.flags;
2549         lun = iocb->u.tmf.lun;
2550
2551         tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2552         tsk->entry_count = 1;
2553         tsk->handle = MAKE_HANDLE(req->id, tsk->handle);
2554         tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2555         tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2556         tsk->control_flags = cpu_to_le32(flags);
2557         tsk->port_id[0] = fcport->d_id.b.al_pa;
2558         tsk->port_id[1] = fcport->d_id.b.area;
2559         tsk->port_id[2] = fcport->d_id.b.domain;
2560         tsk->vp_index = fcport->vha->vp_idx;
2561
2562         if (flags == TCF_LUN_RESET) {
2563                 int_to_scsilun(lun, &tsk->lun);
2564                 host_to_fcp_swap((uint8_t *)&tsk->lun,
2565                         sizeof(tsk->lun));
2566         }
2567 }
2568
2569 static void
2570 qla2x00_els_dcmd_sp_free(void *data)
2571 {
2572         srb_t *sp = data;
2573         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2574
2575         kfree(sp->fcport);
2576
2577         if (elsio->u.els_logo.els_logo_pyld)
2578                 dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
2579                     elsio->u.els_logo.els_logo_pyld,
2580                     elsio->u.els_logo.els_logo_pyld_dma);
2581
2582         del_timer(&elsio->timer);
2583         qla2x00_rel_sp(sp);
2584 }
2585
2586 static void
2587 qla2x00_els_dcmd_iocb_timeout(void *data)
2588 {
2589         srb_t *sp = data;
2590         fc_port_t *fcport = sp->fcport;
2591         struct scsi_qla_host *vha = sp->vha;
2592         struct srb_iocb *lio = &sp->u.iocb_cmd;
2593
2594         ql_dbg(ql_dbg_io, vha, 0x3069,
2595             "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
2596             sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
2597             fcport->d_id.b.al_pa);
2598
2599         complete(&lio->u.els_logo.comp);
2600 }
2601
2602 static void
2603 qla2x00_els_dcmd_sp_done(void *ptr, int res)
2604 {
2605         srb_t *sp = ptr;
2606         fc_port_t *fcport = sp->fcport;
2607         struct srb_iocb *lio = &sp->u.iocb_cmd;
2608         struct scsi_qla_host *vha = sp->vha;
2609
2610         ql_dbg(ql_dbg_io, vha, 0x3072,
2611             "%s hdl=%x, portid=%02x%02x%02x done\n",
2612             sp->name, sp->handle, fcport->d_id.b.domain,
2613             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2614
2615         complete(&lio->u.els_logo.comp);
2616 }
2617
2618 int
2619 qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
2620     port_id_t remote_did)
2621 {
2622         srb_t *sp;
2623         fc_port_t *fcport = NULL;
2624         struct srb_iocb *elsio = NULL;
2625         struct qla_hw_data *ha = vha->hw;
2626         struct els_logo_payload logo_pyld;
2627         int rval = QLA_SUCCESS;
2628
2629         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
2630         if (!fcport) {
2631                ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
2632                return -ENOMEM;
2633         }
2634
2635         /* Alloc SRB structure */
2636         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2637         if (!sp) {
2638                 kfree(fcport);
2639                 ql_log(ql_log_info, vha, 0x70e6,
2640                  "SRB allocation failed\n");
2641                 return -ENOMEM;
2642         }
2643
2644         elsio = &sp->u.iocb_cmd;
2645         fcport->loop_id = 0xFFFF;
2646         fcport->d_id.b.domain = remote_did.b.domain;
2647         fcport->d_id.b.area = remote_did.b.area;
2648         fcport->d_id.b.al_pa = remote_did.b.al_pa;
2649
2650         ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
2651             fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
2652
2653         sp->type = SRB_ELS_DCMD;
2654         sp->name = "ELS_DCMD";
2655         sp->fcport = fcport;
2656         elsio->timeout = qla2x00_els_dcmd_iocb_timeout;
2657         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT);
2658         init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
2659         sp->done = qla2x00_els_dcmd_sp_done;
2660         sp->free = qla2x00_els_dcmd_sp_free;
2661
2662         elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
2663                             DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
2664                             GFP_KERNEL);
2665
2666         if (!elsio->u.els_logo.els_logo_pyld) {
2667                 sp->free(sp);
2668                 return QLA_FUNCTION_FAILED;
2669         }
2670
2671         memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
2672
2673         elsio->u.els_logo.els_cmd = els_opcode;
2674         logo_pyld.opcode = els_opcode;
2675         logo_pyld.s_id[0] = vha->d_id.b.al_pa;
2676         logo_pyld.s_id[1] = vha->d_id.b.area;
2677         logo_pyld.s_id[2] = vha->d_id.b.domain;
2678         host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
2679         memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
2680
2681         memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
2682             sizeof(struct els_logo_payload));
2683
2684         rval = qla2x00_start_sp(sp);
2685         if (rval != QLA_SUCCESS) {
2686                 sp->free(sp);
2687                 return QLA_FUNCTION_FAILED;
2688         }
2689
2690         ql_dbg(ql_dbg_io, vha, 0x3074,
2691             "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
2692             sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
2693             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2694
2695         wait_for_completion(&elsio->u.els_logo.comp);
2696
2697         sp->free(sp);
2698         return rval;
2699 }
2700
2701 static void
2702 qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2703 {
2704         scsi_qla_host_t *vha = sp->vha;
2705         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2706
2707         els_iocb->entry_type = ELS_IOCB_TYPE;
2708         els_iocb->entry_count = 1;
2709         els_iocb->sys_define = 0;
2710         els_iocb->entry_status = 0;
2711         els_iocb->handle = sp->handle;
2712         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2713         els_iocb->tx_dsd_count = 1;
2714         els_iocb->vp_index = vha->vp_idx;
2715         els_iocb->sof_type = EST_SOFI3;
2716         els_iocb->rx_dsd_count = 0;
2717         els_iocb->opcode = elsio->u.els_logo.els_cmd;
2718
2719         els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2720         els_iocb->port_id[1] = sp->fcport->d_id.b.area;
2721         els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2722         els_iocb->s_id[0] = vha->d_id.b.al_pa;
2723         els_iocb->s_id[1] = vha->d_id.b.area;
2724         els_iocb->s_id[2] = vha->d_id.b.domain;
2725         els_iocb->control_flags = 0;
2726
2727         if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
2728                 els_iocb->tx_byte_count = els_iocb->tx_len =
2729                         sizeof(struct els_plogi_payload);
2730                 els_iocb->tx_address[0] =
2731                         cpu_to_le32(LSD(elsio->u.els_plogi.els_plogi_pyld_dma));
2732                 els_iocb->tx_address[1] =
2733                         cpu_to_le32(MSD(elsio->u.els_plogi.els_plogi_pyld_dma));
2734
2735                 els_iocb->rx_dsd_count = 1;
2736                 els_iocb->rx_byte_count = els_iocb->rx_len =
2737                         sizeof(struct els_plogi_payload);
2738                 els_iocb->rx_address[0] =
2739                         cpu_to_le32(LSD(elsio->u.els_plogi.els_resp_pyld_dma));
2740                 els_iocb->rx_address[1] =
2741                         cpu_to_le32(MSD(elsio->u.els_plogi.els_resp_pyld_dma));
2742
2743                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
2744                     "PLOGI ELS IOCB:\n");
2745                 ql_dump_buffer(ql_log_info, vha, 0x0109,
2746                     (uint8_t *)els_iocb, 0x70);
2747         } else {
2748                 els_iocb->tx_byte_count = sizeof(struct els_logo_payload);
2749                 els_iocb->tx_address[0] =
2750                     cpu_to_le32(LSD(elsio->u.els_logo.els_logo_pyld_dma));
2751                 els_iocb->tx_address[1] =
2752                     cpu_to_le32(MSD(elsio->u.els_logo.els_logo_pyld_dma));
2753                 els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
2754
2755                 els_iocb->rx_byte_count = 0;
2756                 els_iocb->rx_address[0] = 0;
2757                 els_iocb->rx_address[1] = 0;
2758                 els_iocb->rx_len = 0;
2759         }
2760
2761         sp->vha->qla_stats.control_requests++;
2762 }
2763
2764 static void
2765 qla2x00_els_dcmd2_iocb_timeout(void *data)
2766 {
2767         srb_t *sp = data;
2768         fc_port_t *fcport = sp->fcport;
2769         struct scsi_qla_host *vha = sp->vha;
2770         struct qla_hw_data *ha = vha->hw;
2771         unsigned long flags = 0;
2772         int res;
2773
2774         ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
2775             "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
2776             sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
2777
2778         /* Abort the exchange */
2779         spin_lock_irqsave(&ha->hardware_lock, flags);
2780         res = ha->isp_ops->abort_command(sp);
2781         ql_dbg(ql_dbg_io, vha, 0x3070,
2782             "mbx abort_command %s\n",
2783             (res == QLA_SUCCESS) ? "successful" : "failed");
2784         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2785
2786         sp->done(sp, QLA_FUNCTION_TIMEOUT);
2787 }
2788
2789 static void
2790 qla2x00_els_dcmd2_sp_done(void *ptr, int res)
2791 {
2792         srb_t *sp = ptr;
2793         fc_port_t *fcport = sp->fcport;
2794         struct srb_iocb *lio = &sp->u.iocb_cmd;
2795         struct scsi_qla_host *vha = sp->vha;
2796         struct event_arg ea;
2797         struct qla_work_evt *e;
2798
2799         ql_dbg(ql_dbg_disc, vha, 0x3072,
2800             "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
2801             sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
2802
2803         fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
2804         del_timer(&sp->u.iocb_cmd.timer);
2805
2806         if (sp->flags & SRB_WAKEUP_ON_COMP)
2807                 complete(&lio->u.els_plogi.comp);
2808         else {
2809                 if (res) {
2810                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2811                 } else {
2812                         memset(&ea, 0, sizeof(ea));
2813                         ea.fcport = fcport;
2814                         ea.rc = res;
2815                         ea.event = FCME_ELS_PLOGI_DONE;
2816                         qla2x00_fcport_event_handler(vha, &ea);
2817                 }
2818
2819                 e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
2820                 if (!e) {
2821                         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2822
2823                         if (elsio->u.els_plogi.els_plogi_pyld)
2824                                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2825                                     elsio->u.els_plogi.tx_size,
2826                                     elsio->u.els_plogi.els_plogi_pyld,
2827                                     elsio->u.els_plogi.els_plogi_pyld_dma);
2828
2829                         if (elsio->u.els_plogi.els_resp_pyld)
2830                                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2831                                     elsio->u.els_plogi.rx_size,
2832                                     elsio->u.els_plogi.els_resp_pyld,
2833                                     elsio->u.els_plogi.els_resp_pyld_dma);
2834                         sp->free(sp);
2835                         return;
2836                 }
2837                 e->u.iosb.sp = sp;
2838                 qla2x00_post_work(vha, e);
2839         }
2840 }
2841
2842 int
2843 qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
2844     fc_port_t *fcport, bool wait)
2845 {
2846         srb_t *sp;
2847         struct srb_iocb *elsio = NULL;
2848         struct qla_hw_data *ha = vha->hw;
2849         int rval = QLA_SUCCESS;
2850         void    *ptr, *resp_ptr;
2851
2852         /* Alloc SRB structure */
2853         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2854         if (!sp) {
2855                 ql_log(ql_log_info, vha, 0x70e6,
2856                  "SRB allocation failed\n");
2857                 return -ENOMEM;
2858         }
2859
2860         elsio = &sp->u.iocb_cmd;
2861         ql_dbg(ql_dbg_io, vha, 0x3073,
2862             "Enter: PLOGI portid=%06x\n", fcport->d_id.b24);
2863
2864         fcport->flags |= FCF_ASYNC_SENT;
2865         sp->type = SRB_ELS_DCMD;
2866         sp->name = "ELS_DCMD";
2867         sp->fcport = fcport;
2868
2869         elsio->timeout = qla2x00_els_dcmd2_iocb_timeout;
2870         init_completion(&elsio->u.els_plogi.comp);
2871         if (wait)
2872                 sp->flags = SRB_WAKEUP_ON_COMP;
2873
2874         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT + 2);
2875
2876         sp->done = qla2x00_els_dcmd2_sp_done;
2877         elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
2878
2879         ptr = elsio->u.els_plogi.els_plogi_pyld =
2880             dma_alloc_coherent(&ha->pdev->dev, DMA_POOL_SIZE,
2881                 &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
2882
2883         if (!elsio->u.els_plogi.els_plogi_pyld) {
2884                 rval = QLA_FUNCTION_FAILED;
2885                 goto out;
2886         }
2887
2888         resp_ptr = elsio->u.els_plogi.els_resp_pyld =
2889             dma_alloc_coherent(&ha->pdev->dev, DMA_POOL_SIZE,
2890                 &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
2891
2892         if (!elsio->u.els_plogi.els_resp_pyld) {
2893                 rval = QLA_FUNCTION_FAILED;
2894                 goto out;
2895         }
2896
2897         ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
2898
2899         memset(ptr, 0, sizeof(struct els_plogi_payload));
2900         memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
2901         memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
2902             &ha->plogi_els_payld.data,
2903             sizeof(elsio->u.els_plogi.els_plogi_pyld->data));
2904
2905         elsio->u.els_plogi.els_cmd = els_opcode;
2906         elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
2907
2908         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
2909         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
2910             (uint8_t *)elsio->u.els_plogi.els_plogi_pyld, 0x70);
2911
2912         rval = qla2x00_start_sp(sp);
2913         if (rval != QLA_SUCCESS) {
2914                 rval = QLA_FUNCTION_FAILED;
2915         } else {
2916                 ql_dbg(ql_dbg_disc, vha, 0x3074,
2917                     "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
2918                     sp->name, sp->handle, fcport->loop_id,
2919                     fcport->d_id.b24, vha->d_id.b24);
2920         }
2921
2922         if (wait) {
2923                 wait_for_completion(&elsio->u.els_plogi.comp);
2924
2925                 if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
2926                         rval = QLA_FUNCTION_FAILED;
2927         } else {
2928                 goto done;
2929         }
2930
2931 out:
2932         fcport->flags &= ~(FCF_ASYNC_SENT);
2933         if (elsio->u.els_plogi.els_plogi_pyld)
2934                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2935                     elsio->u.els_plogi.tx_size,
2936                     elsio->u.els_plogi.els_plogi_pyld,
2937                     elsio->u.els_plogi.els_plogi_pyld_dma);
2938
2939         if (elsio->u.els_plogi.els_resp_pyld)
2940                 dma_free_coherent(&sp->vha->hw->pdev->dev,
2941                     elsio->u.els_plogi.rx_size,
2942                     elsio->u.els_plogi.els_resp_pyld,
2943                     elsio->u.els_plogi.els_resp_pyld_dma);
2944
2945         sp->free(sp);
2946 done:
2947         return rval;
2948 }
2949
2950 static void
2951 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2952 {
2953         struct bsg_job *bsg_job = sp->u.bsg_job;
2954         struct fc_bsg_request *bsg_request = bsg_job->request;
2955
2956         els_iocb->entry_type = ELS_IOCB_TYPE;
2957         els_iocb->entry_count = 1;
2958         els_iocb->sys_define = 0;
2959         els_iocb->entry_status = 0;
2960         els_iocb->handle = sp->handle;
2961         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2962         els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
2963         els_iocb->vp_index = sp->vha->vp_idx;
2964         els_iocb->sof_type = EST_SOFI3;
2965         els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
2966
2967         els_iocb->opcode =
2968             sp->type == SRB_ELS_CMD_RPT ?
2969             bsg_request->rqst_data.r_els.els_code :
2970             bsg_request->rqst_data.h_els.command_code;
2971         els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2972         els_iocb->port_id[1] = sp->fcport->d_id.b.area;
2973         els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2974         els_iocb->control_flags = 0;
2975         els_iocb->rx_byte_count =
2976             cpu_to_le32(bsg_job->reply_payload.payload_len);
2977         els_iocb->tx_byte_count =
2978             cpu_to_le32(bsg_job->request_payload.payload_len);
2979
2980         els_iocb->tx_address[0] = cpu_to_le32(LSD(sg_dma_address
2981             (bsg_job->request_payload.sg_list)));
2982         els_iocb->tx_address[1] = cpu_to_le32(MSD(sg_dma_address
2983             (bsg_job->request_payload.sg_list)));
2984         els_iocb->tx_len = cpu_to_le32(sg_dma_len
2985             (bsg_job->request_payload.sg_list));
2986
2987         els_iocb->rx_address[0] = cpu_to_le32(LSD(sg_dma_address
2988             (bsg_job->reply_payload.sg_list)));
2989         els_iocb->rx_address[1] = cpu_to_le32(MSD(sg_dma_address
2990             (bsg_job->reply_payload.sg_list)));
2991         els_iocb->rx_len = cpu_to_le32(sg_dma_len
2992             (bsg_job->reply_payload.sg_list));
2993
2994         sp->vha->qla_stats.control_requests++;
2995 }
2996
2997 static void
2998 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
2999 {
3000         uint16_t        avail_dsds;
3001         uint32_t        *cur_dsd;
3002         struct scatterlist *sg;
3003         int index;
3004         uint16_t tot_dsds;
3005         scsi_qla_host_t *vha = sp->vha;
3006         struct qla_hw_data *ha = vha->hw;
3007         struct bsg_job *bsg_job = sp->u.bsg_job;
3008         int loop_iterartion = 0;
3009         int entry_count = 1;
3010
3011         memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
3012         ct_iocb->entry_type = CT_IOCB_TYPE;
3013         ct_iocb->entry_status = 0;
3014         ct_iocb->handle1 = sp->handle;
3015         SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
3016         ct_iocb->status = cpu_to_le16(0);
3017         ct_iocb->control_flags = cpu_to_le16(0);
3018         ct_iocb->timeout = 0;
3019         ct_iocb->cmd_dsd_count =
3020             cpu_to_le16(bsg_job->request_payload.sg_cnt);
3021         ct_iocb->total_dsd_count =
3022             cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
3023         ct_iocb->req_bytecount =
3024             cpu_to_le32(bsg_job->request_payload.payload_len);
3025         ct_iocb->rsp_bytecount =
3026             cpu_to_le32(bsg_job->reply_payload.payload_len);
3027
3028         ct_iocb->dseg_req_address[0] = cpu_to_le32(LSD(sg_dma_address
3029             (bsg_job->request_payload.sg_list)));
3030         ct_iocb->dseg_req_address[1] = cpu_to_le32(MSD(sg_dma_address
3031             (bsg_job->request_payload.sg_list)));
3032         ct_iocb->dseg_req_length = ct_iocb->req_bytecount;
3033
3034         ct_iocb->dseg_rsp_address[0] = cpu_to_le32(LSD(sg_dma_address
3035             (bsg_job->reply_payload.sg_list)));
3036         ct_iocb->dseg_rsp_address[1] = cpu_to_le32(MSD(sg_dma_address
3037             (bsg_job->reply_payload.sg_list)));
3038         ct_iocb->dseg_rsp_length = ct_iocb->rsp_bytecount;
3039
3040         avail_dsds = 1;
3041         cur_dsd = (uint32_t *)ct_iocb->dseg_rsp_address;
3042         index = 0;
3043         tot_dsds = bsg_job->reply_payload.sg_cnt;
3044
3045         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
3046                 dma_addr_t       sle_dma;
3047                 cont_a64_entry_t *cont_pkt;
3048
3049                 /* Allocate additional continuation packets? */
3050                 if (avail_dsds == 0) {
3051                         /*
3052                         * Five DSDs are available in the Cont.
3053                         * Type 1 IOCB.
3054                                */
3055                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3056                             vha->hw->req_q_map[0]);
3057                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
3058                         avail_dsds = 5;
3059                         entry_count++;
3060                 }
3061
3062                 sle_dma = sg_dma_address(sg);
3063                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
3064                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
3065                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
3066                 loop_iterartion++;
3067                 avail_dsds--;
3068         }
3069         ct_iocb->entry_count = entry_count;
3070
3071         sp->vha->qla_stats.control_requests++;
3072 }
3073
3074 static void
3075 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
3076 {
3077         uint16_t        avail_dsds;
3078         uint32_t        *cur_dsd;
3079         struct scatterlist *sg;
3080         int index;
3081         uint16_t cmd_dsds, rsp_dsds;
3082         scsi_qla_host_t *vha = sp->vha;
3083         struct qla_hw_data *ha = vha->hw;
3084         struct bsg_job *bsg_job = sp->u.bsg_job;
3085         int entry_count = 1;
3086         cont_a64_entry_t *cont_pkt = NULL;
3087
3088         ct_iocb->entry_type = CT_IOCB_TYPE;
3089         ct_iocb->entry_status = 0;
3090         ct_iocb->sys_define = 0;
3091         ct_iocb->handle = sp->handle;
3092
3093         ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3094         ct_iocb->vp_index = sp->vha->vp_idx;
3095         ct_iocb->comp_status = cpu_to_le16(0);
3096
3097         cmd_dsds = bsg_job->request_payload.sg_cnt;
3098         rsp_dsds = bsg_job->reply_payload.sg_cnt;
3099
3100         ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
3101         ct_iocb->timeout = 0;
3102         ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
3103         ct_iocb->cmd_byte_count =
3104             cpu_to_le32(bsg_job->request_payload.payload_len);
3105
3106         avail_dsds = 2;
3107         cur_dsd = (uint32_t *)ct_iocb->dseg_0_address;
3108         index = 0;
3109
3110         for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
3111                 dma_addr_t       sle_dma;
3112
3113                 /* Allocate additional continuation packets? */
3114                 if (avail_dsds == 0) {
3115                         /*
3116                          * Five DSDs are available in the Cont.
3117                          * Type 1 IOCB.
3118                          */
3119                         cont_pkt = qla2x00_prep_cont_type1_iocb(
3120                             vha, ha->req_q_map[0]);
3121                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
3122                         avail_dsds = 5;
3123                         entry_count++;
3124                 }
3125
3126                 sle_dma = sg_dma_address(sg);
3127                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
3128                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
3129                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
3130                 avail_dsds--;
3131         }
3132
3133         index = 0;
3134
3135         for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
3136                 dma_addr_t       sle_dma;
3137
3138                 /* Allocate additional continuation packets? */
3139                 if (avail_dsds == 0) {
3140                         /*
3141                         * Five DSDs are available in the Cont.
3142                         * Type 1 IOCB.
3143                                */
3144                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3145                             ha->req_q_map[0]);
3146                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
3147                         avail_dsds = 5;
3148                         entry_count++;
3149                 }
3150
3151                 sle_dma = sg_dma_address(sg);
3152                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
3153                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
3154                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
3155                 avail_dsds--;
3156         }
3157         ct_iocb->entry_count = entry_count;
3158 }
3159
3160 /*
3161  * qla82xx_start_scsi() - Send a SCSI command to the ISP
3162  * @sp: command to send to the ISP
3163  *
3164  * Returns non-zero if a failure occurred, else zero.
3165  */
3166 int
3167 qla82xx_start_scsi(srb_t *sp)
3168 {
3169         int             nseg;
3170         unsigned long   flags;
3171         struct scsi_cmnd *cmd;
3172         uint32_t        *clr_ptr;
3173         uint32_t        index;
3174         uint32_t        handle;
3175         uint16_t        cnt;
3176         uint16_t        req_cnt;
3177         uint16_t        tot_dsds;
3178         struct device_reg_82xx __iomem *reg;
3179         uint32_t dbval;
3180         uint32_t *fcp_dl;
3181         uint8_t additional_cdb_len;
3182         struct ct6_dsd *ctx;
3183         struct scsi_qla_host *vha = sp->vha;
3184         struct qla_hw_data *ha = vha->hw;
3185         struct req_que *req = NULL;
3186         struct rsp_que *rsp = NULL;
3187
3188         /* Setup device pointers. */
3189         reg = &ha->iobase->isp82;
3190         cmd = GET_CMD_SP(sp);
3191         req = vha->req;
3192         rsp = ha->rsp_q_map[0];
3193
3194         /* So we know we haven't pci_map'ed anything yet */
3195         tot_dsds = 0;
3196
3197         dbval = 0x04 | (ha->portnum << 5);
3198
3199         /* Send marker if required */
3200         if (vha->marker_needed != 0) {
3201                 if (qla2x00_marker(vha, ha->base_qpair,
3202                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
3203                         ql_log(ql_log_warn, vha, 0x300c,
3204                             "qla2x00_marker failed for cmd=%p.\n", cmd);
3205                         return QLA_FUNCTION_FAILED;
3206                 }
3207                 vha->marker_needed = 0;
3208         }
3209
3210         /* Acquire ring specific lock */
3211         spin_lock_irqsave(&ha->hardware_lock, flags);
3212
3213         /* Check for room in outstanding command list. */
3214         handle = req->current_outstanding_cmd;
3215         for (index = 1; index < req->num_outstanding_cmds; index++) {
3216                 handle++;
3217                 if (handle == req->num_outstanding_cmds)
3218                         handle = 1;
3219                 if (!req->outstanding_cmds[handle])
3220                         break;
3221         }
3222         if (index == req->num_outstanding_cmds)
3223                 goto queuing_error;
3224
3225         /* Map the sg table so we have an accurate count of sg entries needed */
3226         if (scsi_sg_count(cmd)) {
3227                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
3228                     scsi_sg_count(cmd), cmd->sc_data_direction);
3229                 if (unlikely(!nseg))
3230                         goto queuing_error;
3231         } else
3232                 nseg = 0;
3233
3234         tot_dsds = nseg;
3235
3236         if (tot_dsds > ql2xshiftctondsd) {
3237                 struct cmd_type_6 *cmd_pkt;
3238                 uint16_t more_dsd_lists = 0;
3239                 struct dsd_dma *dsd_ptr;
3240                 uint16_t i;
3241
3242                 more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
3243                 if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
3244                         ql_dbg(ql_dbg_io, vha, 0x300d,
3245                             "Num of DSD list %d is than %d for cmd=%p.\n",
3246                             more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
3247                             cmd);
3248                         goto queuing_error;
3249                 }
3250
3251                 if (more_dsd_lists <= ha->gbl_dsd_avail)
3252                         goto sufficient_dsds;
3253                 else
3254                         more_dsd_lists -= ha->gbl_dsd_avail;
3255
3256                 for (i = 0; i < more_dsd_lists; i++) {
3257                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
3258                         if (!dsd_ptr) {
3259                                 ql_log(ql_log_fatal, vha, 0x300e,
3260                                     "Failed to allocate memory for dsd_dma "
3261                                     "for cmd=%p.\n", cmd);
3262                                 goto queuing_error;
3263                         }
3264
3265                         dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
3266                                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
3267                         if (!dsd_ptr->dsd_addr) {
3268                                 kfree(dsd_ptr);
3269                                 ql_log(ql_log_fatal, vha, 0x300f,
3270                                     "Failed to allocate memory for dsd_addr "
3271                                     "for cmd=%p.\n", cmd);
3272                                 goto queuing_error;
3273                         }
3274                         list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
3275                         ha->gbl_dsd_avail++;
3276                 }
3277
3278 sufficient_dsds:
3279                 req_cnt = 1;
3280
3281                 if (req->cnt < (req_cnt + 2)) {
3282                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
3283                                 &reg->req_q_out[0]);
3284                         if (req->ring_index < cnt)
3285                                 req->cnt = cnt - req->ring_index;
3286                         else
3287                                 req->cnt = req->length -
3288                                         (req->ring_index - cnt);
3289                         if (req->cnt < (req_cnt + 2))
3290                                 goto queuing_error;
3291                 }
3292
3293                 ctx = sp->u.scmd.ctx =
3294                     mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
3295                 if (!ctx) {
3296                         ql_log(ql_log_fatal, vha, 0x3010,
3297                             "Failed to allocate ctx for cmd=%p.\n", cmd);
3298                         goto queuing_error;
3299                 }
3300
3301                 memset(ctx, 0, sizeof(struct ct6_dsd));
3302                 ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
3303                         GFP_ATOMIC, &ctx->fcp_cmnd_dma);
3304                 if (!ctx->fcp_cmnd) {
3305                         ql_log(ql_log_fatal, vha, 0x3011,
3306                             "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
3307                         goto queuing_error;
3308                 }
3309
3310                 /* Initialize the DSD list and dma handle */
3311                 INIT_LIST_HEAD(&ctx->dsd_list);
3312                 ctx->dsd_use_cnt = 0;
3313
3314                 if (cmd->cmd_len > 16) {
3315                         additional_cdb_len = cmd->cmd_len - 16;
3316                         if ((cmd->cmd_len % 4) != 0) {
3317                                 /* SCSI command bigger than 16 bytes must be
3318                                  * multiple of 4
3319                                  */
3320                                 ql_log(ql_log_warn, vha, 0x3012,
3321                                     "scsi cmd len %d not multiple of 4 "
3322                                     "for cmd=%p.\n", cmd->cmd_len, cmd);
3323                                 goto queuing_error_fcp_cmnd;
3324                         }
3325                         ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
3326                 } else {
3327                         additional_cdb_len = 0;
3328                         ctx->fcp_cmnd_len = 12 + 16 + 4;
3329                 }
3330
3331                 cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
3332                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3333
3334                 /* Zero out remaining portion of packet. */
3335                 /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
3336                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3337                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3338                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3339
3340                 /* Set NPORT-ID and LUN number*/
3341                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3342                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3343                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3344                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3345                 cmd_pkt->vp_index = sp->vha->vp_idx;
3346
3347                 /* Build IOCB segments */
3348                 if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
3349                         goto queuing_error_fcp_cmnd;
3350
3351                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3352                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
3353
3354                 /* build FCP_CMND IU */
3355                 int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
3356                 ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
3357
3358                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
3359                         ctx->fcp_cmnd->additional_cdb_len |= 1;
3360                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
3361                         ctx->fcp_cmnd->additional_cdb_len |= 2;
3362
3363                 /* Populate the FCP_PRIO. */
3364                 if (ha->flags.fcp_prio_enabled)
3365                         ctx->fcp_cmnd->task_attribute |=
3366                             sp->fcport->fcp_prio << 3;
3367
3368                 memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
3369
3370                 fcp_dl = (uint32_t *)(ctx->fcp_cmnd->cdb + 16 +
3371                     additional_cdb_len);
3372                 *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
3373
3374                 cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
3375                 cmd_pkt->fcp_cmnd_dseg_address[0] =
3376                     cpu_to_le32(LSD(ctx->fcp_cmnd_dma));
3377                 cmd_pkt->fcp_cmnd_dseg_address[1] =
3378                     cpu_to_le32(MSD(ctx->fcp_cmnd_dma));
3379
3380                 sp->flags |= SRB_FCP_CMND_DMA_VALID;
3381                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3382                 /* Set total data segment count. */
3383                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3384                 /* Specify response queue number where
3385                  * completion should happen
3386                  */
3387                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3388         } else {
3389                 struct cmd_type_7 *cmd_pkt;
3390                 req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3391                 if (req->cnt < (req_cnt + 2)) {
3392                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
3393                             &reg->req_q_out[0]);
3394                         if (req->ring_index < cnt)
3395                                 req->cnt = cnt - req->ring_index;
3396                         else
3397                                 req->cnt = req->length -
3398                                         (req->ring_index - cnt);
3399                 }
3400                 if (req->cnt < (req_cnt + 2))
3401                         goto queuing_error;
3402
3403                 cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
3404                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3405
3406                 /* Zero out remaining portion of packet. */
3407                 /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3408                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3409                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3410                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3411
3412                 /* Set NPORT-ID and LUN number*/
3413                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3414                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3415                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3416                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3417                 cmd_pkt->vp_index = sp->vha->vp_idx;
3418
3419                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3420                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
3421                     sizeof(cmd_pkt->lun));
3422
3423                 /* Populate the FCP_PRIO. */
3424                 if (ha->flags.fcp_prio_enabled)
3425                         cmd_pkt->task |= sp->fcport->fcp_prio << 3;
3426
3427                 /* Load SCSI command packet. */
3428                 memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
3429                 host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
3430
3431                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3432
3433                 /* Build IOCB segments */
3434                 qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
3435
3436                 /* Set total data segment count. */
3437                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3438                 /* Specify response queue number where
3439                  * completion should happen.
3440                  */
3441                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3442
3443         }
3444         /* Build command packet. */
3445         req->current_outstanding_cmd = handle;
3446         req->outstanding_cmds[handle] = sp;
3447         sp->handle = handle;
3448         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
3449         req->cnt -= req_cnt;
3450         wmb();
3451
3452         /* Adjust ring index. */
3453         req->ring_index++;
3454         if (req->ring_index == req->length) {
3455                 req->ring_index = 0;
3456                 req->ring_ptr = req->ring;
3457         } else
3458                 req->ring_ptr++;
3459
3460         sp->flags |= SRB_DMA_VALID;
3461
3462         /* Set chip new ring index. */
3463         /* write, read and verify logic */
3464         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
3465         if (ql2xdbwr)
3466                 qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
3467         else {
3468                 WRT_REG_DWORD(ha->nxdb_wr_ptr, dbval);
3469                 wmb();
3470                 while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
3471                         WRT_REG_DWORD(ha->nxdb_wr_ptr, dbval);
3472                         wmb();
3473                 }
3474         }
3475
3476         /* Manage unprocessed RIO/ZIO commands in response queue. */
3477         if (vha->flags.process_response_queue &&
3478             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
3479                 qla24xx_process_response_queue(vha, rsp);
3480
3481         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3482         return QLA_SUCCESS;
3483
3484 queuing_error_fcp_cmnd:
3485         dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
3486 queuing_error:
3487         if (tot_dsds)
3488                 scsi_dma_unmap(cmd);
3489
3490         if (sp->u.scmd.ctx) {
3491                 mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
3492                 sp->u.scmd.ctx = NULL;
3493         }
3494         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3495
3496         return QLA_FUNCTION_FAILED;
3497 }
3498
3499 static void
3500 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
3501 {
3502         struct srb_iocb *aio = &sp->u.iocb_cmd;
3503         scsi_qla_host_t *vha = sp->vha;
3504         struct req_que *req = sp->qpair->req;
3505
3506         memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
3507         abt_iocb->entry_type = ABORT_IOCB_TYPE;
3508         abt_iocb->entry_count = 1;
3509         abt_iocb->handle = cpu_to_le32(MAKE_HANDLE(req->id, sp->handle));
3510         if (sp->fcport) {
3511                 abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3512                 abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
3513                 abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
3514                 abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
3515         }
3516         abt_iocb->handle_to_abort =
3517             cpu_to_le32(MAKE_HANDLE(aio->u.abt.req_que_no,
3518                                     aio->u.abt.cmd_hndl));
3519         abt_iocb->vp_index = vha->vp_idx;
3520         abt_iocb->req_que_no = cpu_to_le16(aio->u.abt.req_que_no);
3521         /* Send the command to the firmware */
3522         wmb();
3523 }
3524
3525 static void
3526 qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
3527 {
3528         int i, sz;
3529
3530         mbx->entry_type = MBX_IOCB_TYPE;
3531         mbx->handle = sp->handle;
3532         sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
3533
3534         for (i = 0; i < sz; i++)
3535                 mbx->mb[i] = cpu_to_le16(sp->u.iocb_cmd.u.mbx.out_mb[i]);
3536 }
3537
3538 static void
3539 qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
3540 {
3541         sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
3542         qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
3543         ct_pkt->handle = sp->handle;
3544 }
3545
3546 static void qla2x00_send_notify_ack_iocb(srb_t *sp,
3547         struct nack_to_isp *nack)
3548 {
3549         struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
3550
3551         nack->entry_type = NOTIFY_ACK_TYPE;
3552         nack->entry_count = 1;
3553         nack->ox_id = ntfy->ox_id;
3554
3555         nack->u.isp24.handle = sp->handle;
3556         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3557         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3558                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3559                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3560         }
3561         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3562         nack->u.isp24.status = ntfy->u.isp24.status;
3563         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3564         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3565         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3566         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3567         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3568         nack->u.isp24.srr_flags = 0;
3569         nack->u.isp24.srr_reject_code = 0;
3570         nack->u.isp24.srr_reject_code_expl = 0;
3571         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3572 }
3573
3574 /*
3575  * Build NVME LS request
3576  */
3577 static int
3578 qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
3579 {
3580         struct srb_iocb *nvme;
3581         int     rval = QLA_SUCCESS;
3582
3583         nvme = &sp->u.iocb_cmd;
3584         cmd_pkt->entry_type = PT_LS4_REQUEST;
3585         cmd_pkt->entry_count = 1;
3586         cmd_pkt->control_flags = CF_LS4_ORIGINATOR << CF_LS4_SHIFT;
3587
3588         cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
3589         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3590         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
3591
3592         cmd_pkt->tx_dseg_count = 1;
3593         cmd_pkt->tx_byte_count = nvme->u.nvme.cmd_len;
3594         cmd_pkt->dseg0_len = nvme->u.nvme.cmd_len;
3595         cmd_pkt->dseg0_address[0] = cpu_to_le32(LSD(nvme->u.nvme.cmd_dma));
3596         cmd_pkt->dseg0_address[1] = cpu_to_le32(MSD(nvme->u.nvme.cmd_dma));
3597
3598         cmd_pkt->rx_dseg_count = 1;
3599         cmd_pkt->rx_byte_count = nvme->u.nvme.rsp_len;
3600         cmd_pkt->dseg1_len  = nvme->u.nvme.rsp_len;
3601         cmd_pkt->dseg1_address[0] =  cpu_to_le32(LSD(nvme->u.nvme.rsp_dma));
3602         cmd_pkt->dseg1_address[1] =  cpu_to_le32(MSD(nvme->u.nvme.rsp_dma));
3603
3604         return rval;
3605 }
3606
3607 static void
3608 qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
3609 {
3610         int map, pos;
3611
3612         vce->entry_type = VP_CTRL_IOCB_TYPE;
3613         vce->handle = sp->handle;
3614         vce->entry_count = 1;
3615         vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
3616         vce->vp_count = cpu_to_le16(1);
3617
3618         /*
3619          * index map in firmware starts with 1; decrement index
3620          * this is ok as we never use index 0
3621          */
3622         map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
3623         pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
3624         vce->vp_idx_map[map] |= 1 << pos;
3625 }
3626
3627 static void
3628 qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
3629 {
3630         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
3631         logio->control_flags =
3632             cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
3633
3634         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3635         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
3636         logio->port_id[1] = sp->fcport->d_id.b.area;
3637         logio->port_id[2] = sp->fcport->d_id.b.domain;
3638         logio->vp_index = sp->fcport->vha->vp_idx;
3639 }
3640
3641 int
3642 qla2x00_start_sp(srb_t *sp)
3643 {
3644         int rval = QLA_SUCCESS;
3645         scsi_qla_host_t *vha = sp->vha;
3646         struct qla_hw_data *ha = vha->hw;
3647         struct qla_qpair *qp = sp->qpair;
3648         void *pkt;
3649         unsigned long flags;
3650
3651         spin_lock_irqsave(qp->qp_lock_ptr, flags);
3652         pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
3653         if (!pkt) {
3654                 rval = EAGAIN;
3655                 ql_log(ql_log_warn, vha, 0x700c,
3656                     "qla2x00_alloc_iocbs failed.\n");
3657                 goto done;
3658         }
3659
3660         switch (sp->type) {
3661         case SRB_LOGIN_CMD:
3662                 IS_FWI2_CAPABLE(ha) ?
3663                     qla24xx_login_iocb(sp, pkt) :
3664                     qla2x00_login_iocb(sp, pkt);
3665                 break;
3666         case SRB_PRLI_CMD:
3667                 qla24xx_prli_iocb(sp, pkt);
3668                 break;
3669         case SRB_LOGOUT_CMD:
3670                 IS_FWI2_CAPABLE(ha) ?
3671                     qla24xx_logout_iocb(sp, pkt) :
3672                     qla2x00_logout_iocb(sp, pkt);
3673                 break;
3674         case SRB_ELS_CMD_RPT:
3675         case SRB_ELS_CMD_HST:
3676                 qla24xx_els_iocb(sp, pkt);
3677                 break;
3678         case SRB_CT_CMD:
3679                 IS_FWI2_CAPABLE(ha) ?
3680                     qla24xx_ct_iocb(sp, pkt) :
3681                     qla2x00_ct_iocb(sp, pkt);
3682                 break;
3683         case SRB_ADISC_CMD:
3684                 IS_FWI2_CAPABLE(ha) ?
3685                     qla24xx_adisc_iocb(sp, pkt) :
3686                     qla2x00_adisc_iocb(sp, pkt);
3687                 break;
3688         case SRB_TM_CMD:
3689                 IS_QLAFX00(ha) ?
3690                     qlafx00_tm_iocb(sp, pkt) :
3691                     qla24xx_tm_iocb(sp, pkt);
3692                 break;
3693         case SRB_FXIOCB_DCMD:
3694         case SRB_FXIOCB_BCMD:
3695                 qlafx00_fxdisc_iocb(sp, pkt);
3696                 break;
3697         case SRB_NVME_LS:
3698                 qla_nvme_ls(sp, pkt);
3699                 break;
3700         case SRB_ABT_CMD:
3701                 IS_QLAFX00(ha) ?
3702                         qlafx00_abort_iocb(sp, pkt) :
3703                         qla24xx_abort_iocb(sp, pkt);
3704                 break;
3705         case SRB_ELS_DCMD:
3706                 qla24xx_els_logo_iocb(sp, pkt);
3707                 break;
3708         case SRB_CT_PTHRU_CMD:
3709                 qla2x00_ctpthru_cmd_iocb(sp, pkt);
3710                 break;
3711         case SRB_MB_IOCB:
3712                 qla2x00_mb_iocb(sp, pkt);
3713                 break;
3714         case SRB_NACK_PLOGI:
3715         case SRB_NACK_PRLI:
3716         case SRB_NACK_LOGO:
3717                 qla2x00_send_notify_ack_iocb(sp, pkt);
3718                 break;
3719         case SRB_CTRL_VP:
3720                 qla25xx_ctrlvp_iocb(sp, pkt);
3721                 break;
3722         case SRB_PRLO_CMD:
3723                 qla24xx_prlo_iocb(sp, pkt);
3724                 break;
3725         default:
3726                 break;
3727         }
3728
3729         wmb();
3730         qla2x00_start_iocbs(vha, qp->req);
3731 done:
3732         spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
3733         return rval;
3734 }
3735
3736 static void
3737 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
3738                                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
3739 {
3740         uint16_t avail_dsds;
3741         uint32_t *cur_dsd;
3742         uint32_t req_data_len = 0;
3743         uint32_t rsp_data_len = 0;
3744         struct scatterlist *sg;
3745         int index;
3746         int entry_count = 1;
3747         struct bsg_job *bsg_job = sp->u.bsg_job;
3748
3749         /*Update entry type to indicate bidir command */
3750         *((uint32_t *)(&cmd_pkt->entry_type)) =
3751                 cpu_to_le32(COMMAND_BIDIRECTIONAL);
3752
3753         /* Set the transfer direction, in this set both flags
3754          * Also set the BD_WRAP_BACK flag, firmware will take care
3755          * assigning DID=SID for outgoing pkts.
3756          */
3757         cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3758         cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3759         cmd_pkt->control_flags = cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
3760                                                         BD_WRAP_BACK);
3761
3762         req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
3763         cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
3764         cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
3765         cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
3766
3767         vha->bidi_stats.transfer_bytes += req_data_len;
3768         vha->bidi_stats.io_count++;
3769
3770         vha->qla_stats.output_bytes += req_data_len;
3771         vha->qla_stats.output_requests++;
3772
3773         /* Only one dsd is available for bidirectional IOCB, remaining dsds
3774          * are bundled in continuation iocb
3775          */
3776         avail_dsds = 1;
3777         cur_dsd = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
3778
3779         index = 0;
3780
3781         for_each_sg(bsg_job->request_payload.sg_list, sg,
3782                                 bsg_job->request_payload.sg_cnt, index) {
3783                 dma_addr_t sle_dma;
3784                 cont_a64_entry_t *cont_pkt;
3785
3786                 /* Allocate additional continuation packets */
3787                 if (avail_dsds == 0) {
3788                         /* Continuation type 1 IOCB can accomodate
3789                          * 5 DSDS
3790                          */
3791                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3792                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
3793                         avail_dsds = 5;
3794                         entry_count++;
3795                 }
3796                 sle_dma = sg_dma_address(sg);
3797                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
3798                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
3799                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
3800                 avail_dsds--;
3801         }
3802         /* For read request DSD will always goes to continuation IOCB
3803          * and follow the write DSD. If there is room on the current IOCB
3804          * then it is added to that IOCB else new continuation IOCB is
3805          * allocated.
3806          */
3807         for_each_sg(bsg_job->reply_payload.sg_list, sg,
3808                                 bsg_job->reply_payload.sg_cnt, index) {
3809                 dma_addr_t sle_dma;
3810                 cont_a64_entry_t *cont_pkt;
3811
3812                 /* Allocate additional continuation packets */
3813                 if (avail_dsds == 0) {
3814                         /* Continuation type 1 IOCB can accomodate
3815                          * 5 DSDS
3816                          */
3817                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3818                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
3819                         avail_dsds = 5;
3820                         entry_count++;
3821                 }
3822                 sle_dma = sg_dma_address(sg);
3823                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
3824                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
3825                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
3826                 avail_dsds--;
3827         }
3828         /* This value should be same as number of IOCB required for this cmd */
3829         cmd_pkt->entry_count = entry_count;
3830 }
3831
3832 int
3833 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
3834 {
3835
3836         struct qla_hw_data *ha = vha->hw;
3837         unsigned long flags;
3838         uint32_t handle;
3839         uint32_t index;
3840         uint16_t req_cnt;
3841         uint16_t cnt;
3842         uint32_t *clr_ptr;
3843         struct cmd_bidir *cmd_pkt = NULL;
3844         struct rsp_que *rsp;
3845         struct req_que *req;
3846         int rval = EXT_STATUS_OK;
3847
3848         rval = QLA_SUCCESS;
3849
3850         rsp = ha->rsp_q_map[0];
3851         req = vha->req;
3852
3853         /* Send marker if required */
3854         if (vha->marker_needed != 0) {
3855                 if (qla2x00_marker(vha, ha->base_qpair,
3856                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
3857                         return EXT_STATUS_MAILBOX;
3858                 vha->marker_needed = 0;
3859         }
3860
3861         /* Acquire ring specific lock */
3862         spin_lock_irqsave(&ha->hardware_lock, flags);
3863
3864         /* Check for room in outstanding command list. */
3865         handle = req->current_outstanding_cmd;
3866         for (index = 1; index < req->num_outstanding_cmds; index++) {
3867                 handle++;
3868                 if (handle == req->num_outstanding_cmds)
3869                         handle = 1;
3870                 if (!req->outstanding_cmds[handle])
3871                         break;
3872         }
3873
3874         if (index == req->num_outstanding_cmds) {
3875                 rval = EXT_STATUS_BUSY;
3876                 goto queuing_error;
3877         }
3878
3879         /* Calculate number of IOCB required */
3880         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3881
3882         /* Check for room on request queue. */
3883         if (req->cnt < req_cnt + 2) {
3884                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
3885                     RD_REG_DWORD_RELAXED(req->req_q_out);
3886                 if  (req->ring_index < cnt)
3887                         req->cnt = cnt - req->ring_index;
3888                 else
3889                         req->cnt = req->length -
3890                                 (req->ring_index - cnt);
3891         }
3892         if (req->cnt < req_cnt + 2) {
3893                 rval = EXT_STATUS_BUSY;
3894                 goto queuing_error;
3895         }
3896
3897         cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
3898         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
3899
3900         /* Zero out remaining portion of packet. */
3901         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3902         clr_ptr = (uint32_t *)cmd_pkt + 2;
3903         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3904
3905         /* Set NPORT-ID  (of vha)*/
3906         cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
3907         cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
3908         cmd_pkt->port_id[1] = vha->d_id.b.area;
3909         cmd_pkt->port_id[2] = vha->d_id.b.domain;
3910
3911         qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
3912         cmd_pkt->entry_status = (uint8_t) rsp->id;
3913         /* Build command packet. */
3914         req->current_outstanding_cmd = handle;
3915         req->outstanding_cmds[handle] = sp;
3916         sp->handle = handle;
3917         req->cnt -= req_cnt;
3918
3919         /* Send the command to the firmware */
3920         wmb();
3921         qla2x00_start_iocbs(vha, req);
3922 queuing_error:
3923         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3924         return rval;
3925 }