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 static void qla25xx_set_que(srb_t *, struct rsp_que **);
  16 /**
  17  * qla2x00_get_cmd_direction() - Determine control_flag data direction.
  18  * @cmd: SCSI command
  19  *
  20  * Returns the proper CF_* direction based on CDB.
  21  */
  22 static inline uint16_t
  23 qla2x00_get_cmd_direction(srb_t *sp)
  24 {
  25         uint16_t cflags;
  26         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
  27         struct scsi_qla_host *vha = sp->fcport->vha;
  28
  29         cflags = 0;
  30
  31         /* Set transfer direction */
  32         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
  33                 cflags = CF_WRITE;
  34                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
  35                 vha->qla_stats.output_requests++;
  36         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
  37                 cflags = CF_READ;
  38                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
  39                 vha->qla_stats.input_requests++;
  40         }
  41         return (cflags);
  42 }
  43
  44 /**
  45  * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
  46  * Continuation Type 0 IOCBs to allocate.
  47  *
  48  * @dsds: number of data segment decriptors needed
  49  *
  50  * Returns the number of IOCB entries needed to store @dsds.
  51  */
  52 uint16_t
  53 qla2x00_calc_iocbs_32(uint16_t dsds)
  54 {
  55         uint16_t iocbs;
  56
  57         iocbs = 1;
  58         if (dsds > 3) {
  59                 iocbs += (dsds - 3) / 7;
  60                 if ((dsds - 3) % 7)
  61                         iocbs++;
  62         }
  63         return (iocbs);
  64 }
  65
  66 /**
  67  * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
  68  * Continuation Type 1 IOCBs to allocate.
  69  *
  70  * @dsds: number of data segment decriptors needed
  71  *
  72  * Returns the number of IOCB entries needed to store @dsds.
  73  */
  74 uint16_t
  75 qla2x00_calc_iocbs_64(uint16_t dsds)
  76 {
  77         uint16_t iocbs;
  78
  79         iocbs = 1;
  80         if (dsds > 2) {
  81                 iocbs += (dsds - 2) / 5;
  82                 if ((dsds - 2) % 5)
  83                         iocbs++;
  84         }
  85         return (iocbs);
  86 }
  87
  88 /**
  89  * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
  90  * @ha: HA context
  91  *
  92  * Returns a pointer to the Continuation Type 0 IOCB packet.
  93  */
  94 static inline cont_entry_t *
  95 qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
  96 {
  97         cont_entry_t *cont_pkt;
  98         struct req_que *req = vha->req;
  99         /* Adjust ring index. */
 100         req->ring_index++;
 101         if (req->ring_index == req->length) {
 102                 req->ring_index = 0;
 103                 req->ring_ptr = req->ring;
 104         } else {
 105                 req->ring_ptr++;
 106         }
 107
 108         cont_pkt = (cont_entry_t *)req->ring_ptr;
 109
 110         /* Load packet defaults. */
 111         *((uint32_t *)(&cont_pkt->entry_type)) =
 112             __constant_cpu_to_le32(CONTINUE_TYPE);
 113
 114         return (cont_pkt);
 115 }
 116
 117 /**
 118  * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
 119  * @ha: HA context
 120  *
 121  * Returns a pointer to the continuation type 1 IOCB packet.
 122  */
 123 static inline cont_a64_entry_t *
 124 qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
 125 {
 126         cont_a64_entry_t *cont_pkt;
 127
 128         /* Adjust ring index. */
 129         req->ring_index++;
 130         if (req->ring_index == req->length) {
 131                 req->ring_index = 0;
 132                 req->ring_ptr = req->ring;
 133         } else {
 134                 req->ring_ptr++;
 135         }
 136
 137         cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
 138
 139         /* Load packet defaults. */
 140         *((uint32_t *)(&cont_pkt->entry_type)) = IS_QLAFX00(vha->hw) ?
 141             __constant_cpu_to_le32(CONTINUE_A64_TYPE_FX00) :
 142             __constant_cpu_to_le32(CONTINUE_A64_TYPE);
 143
 144         return (cont_pkt);
 145 }
 146
 147 static inline int
 148 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 149 {
 150         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 151         uint8_t guard = scsi_host_get_guard(cmd->device->host);
 152
 153         /* We always use DIFF Bundling for best performance */
 154         *fw_prot_opts = 0;
 155
 156         /* Translate SCSI opcode to a protection opcode */
 157         switch (scsi_get_prot_op(cmd)) {
 158         case SCSI_PROT_READ_STRIP:
 159                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 160                 break;
 161         case SCSI_PROT_WRITE_INSERT:
 162                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 163                 break;
 164         case SCSI_PROT_READ_INSERT:
 165                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 166                 break;
 167         case SCSI_PROT_WRITE_STRIP:
 168                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 169                 break;
 170         case SCSI_PROT_READ_PASS:
 171         case SCSI_PROT_WRITE_PASS:
 172                 if (guard & SHOST_DIX_GUARD_IP)
 173                         *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
 174                 else
 175                         *fw_prot_opts |= PO_MODE_DIF_PASS;
 176                 break;
 177         default:        /* Normal Request */
 178                 *fw_prot_opts |= PO_MODE_DIF_PASS;
 179                 break;
 180         }
 181
 182         return scsi_prot_sg_count(cmd);
 183 }
 184
 185 /*
 186  * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 187  * capable IOCB types.
 188  *
 189  * @sp: SRB command to process
 190  * @cmd_pkt: Command type 2 IOCB
 191  * @tot_dsds: Total number of segments to transfer
 192  */
 193 void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
 194     uint16_t tot_dsds)
 195 {
 196         uint16_t        avail_dsds;
 197         uint32_t        *cur_dsd;
 198         scsi_qla_host_t *vha;
 199         struct scsi_cmnd *cmd;
 200         struct scatterlist *sg;
 201         int i;
 202
 203         cmd = GET_CMD_SP(sp);
 204
 205         /* Update entry type to indicate Command Type 2 IOCB */
 206         *((uint32_t *)(&cmd_pkt->entry_type)) =
 207             __constant_cpu_to_le32(COMMAND_TYPE);
 208
 209         /* No data transfer */
 210         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 211                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
 212                 return;
 213         }
 214
 215         vha = sp->fcport->vha;
 216         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 217
 218         /* Three DSDs are available in the Command Type 2 IOCB */
 219         avail_dsds = 3;
 220         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 221
 222         /* Load data segments */
 223         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 224                 cont_entry_t *cont_pkt;
 225
 226                 /* Allocate additional continuation packets? */
 227                 if (avail_dsds == 0) {
 228                         /*
 229                          * Seven DSDs are available in the Continuation
 230                          * Type 0 IOCB.
 231                          */
 232                         cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
 233                         cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
 234                         avail_dsds = 7;
 235                 }
 236
 237                 *cur_dsd++ = cpu_to_le32(sg_dma_address(sg));
 238                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 239                 avail_dsds--;
 240         }
 241 }
 242
 243 /**
 244  * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 245  * capable IOCB types.
 246  *
 247  * @sp: SRB command to process
 248  * @cmd_pkt: Command type 3 IOCB
 249  * @tot_dsds: Total number of segments to transfer
 250  */
 251 void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
 252     uint16_t tot_dsds)
 253 {
 254         uint16_t        avail_dsds;
 255         uint32_t        *cur_dsd;
 256         scsi_qla_host_t *vha;
 257         struct scsi_cmnd *cmd;
 258         struct scatterlist *sg;
 259         int i;
 260
 261         cmd = GET_CMD_SP(sp);
 262
 263         /* Update entry type to indicate Command Type 3 IOCB */
 264         *((uint32_t *)(&cmd_pkt->entry_type)) =
 265             __constant_cpu_to_le32(COMMAND_A64_TYPE);
 266
 267         /* No data transfer */
 268         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 269                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
 270                 return;
 271         }
 272
 273         vha = sp->fcport->vha;
 274         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 275
 276         /* Two DSDs are available in the Command Type 3 IOCB */
 277         avail_dsds = 2;
 278         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 279
 280         /* Load data segments */
 281         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 282                 dma_addr_t      sle_dma;
 283                 cont_a64_entry_t *cont_pkt;
 284
 285                 /* Allocate additional continuation packets? */
 286                 if (avail_dsds == 0) {
 287                         /*
 288                          * Five DSDs are available in the Continuation
 289                          * Type 1 IOCB.
 290                          */
 291                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 292                         cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 293                         avail_dsds = 5;
 294                 }
 295
 296                 sle_dma = sg_dma_address(sg);
 297                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 298                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 299                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 300                 avail_dsds--;
 301         }
 302 }
 303
 304 /**
 305  * qla2x00_start_scsi() - Send a SCSI command to the ISP
 306  * @sp: command to send to the ISP
 307  *
 308  * Returns non-zero if a failure occurred, else zero.
 309  */
 310 int
 311 qla2x00_start_scsi(srb_t *sp)
 312 {
 313         int             ret, nseg;
 314         unsigned long   flags;
 315         scsi_qla_host_t *vha;
 316         struct scsi_cmnd *cmd;
 317         uint32_t        *clr_ptr;
 318         uint32_t        index;
 319         uint32_t        handle;
 320         cmd_entry_t     *cmd_pkt;
 321         uint16_t        cnt;
 322         uint16_t        req_cnt;
 323         uint16_t        tot_dsds;
 324         struct device_reg_2xxx __iomem *reg;
 325         struct qla_hw_data *ha;
 326         struct req_que *req;
 327         struct rsp_que *rsp;
 328
 329         /* Setup device pointers. */
 330         ret = 0;
 331         vha = sp->fcport->vha;
 332         ha = vha->hw;
 333         reg = &ha->iobase->isp;
 334         cmd = GET_CMD_SP(sp);
 335         req = ha->req_q_map[0];
 336         rsp = ha->rsp_q_map[0];
 337         /* So we know we haven't pci_map'ed anything yet */
 338         tot_dsds = 0;
 339
 340         /* Send marker if required */
 341         if (vha->marker_needed != 0) {
 342                 if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
 343                     QLA_SUCCESS) {
 344                         return (QLA_FUNCTION_FAILED);
 345                 }
 346                 vha->marker_needed = 0;
 347         }
 348
 349         /* Acquire ring specific lock */
 350         spin_lock_irqsave(&ha->hardware_lock, flags);
 351
 352         /* Check for room in outstanding command list. */
 353         handle = req->current_outstanding_cmd;
 354         for (index = 1; index < req->num_outstanding_cmds; index++) {
 355                 handle++;
 356                 if (handle == req->num_outstanding_cmds)
 357                         handle = 1;
 358                 if (!req->outstanding_cmds[handle])
 359                         break;
 360         }
 361         if (index == req->num_outstanding_cmds)
 362                 goto queuing_error;
 363
 364         /* Map the sg table so we have an accurate count of sg entries needed */
 365         if (scsi_sg_count(cmd)) {
 366                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
 367                     scsi_sg_count(cmd), cmd->sc_data_direction);
 368                 if (unlikely(!nseg))
 369                         goto queuing_error;
 370         } else
 371                 nseg = 0;
 372
 373         tot_dsds = nseg;
 374
 375         /* Calculate the number of request entries needed. */
 376         req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
 377         if (req->cnt < (req_cnt + 2)) {
 378                 cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
 379                 if (req->ring_index < cnt)
 380                         req->cnt = cnt - req->ring_index;
 381                 else
 382                         req->cnt = req->length -
 383                             (req->ring_index - cnt);
 384                 /* If still no head room then bail out */
 385                 if (req->cnt < (req_cnt + 2))
 386                         goto queuing_error;
 387         }
 388
 389         /* Build command packet */
 390         req->current_outstanding_cmd = handle;
 391         req->outstanding_cmds[handle] = sp;
 392         sp->handle = handle;
 393         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
 394         req->cnt -= req_cnt;
 395
 396         cmd_pkt = (cmd_entry_t *)req->ring_ptr;
 397         cmd_pkt->handle = handle;
 398         /* Zero out remaining portion of packet. */
 399         clr_ptr = (uint32_t *)cmd_pkt + 2;
 400         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 401         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 402
 403         /* Set target ID and LUN number*/
 404         SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
 405         cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
 406         cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
 407
 408         /* Load SCSI command packet. */
 409         memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
 410         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 411
 412         /* Build IOCB segments */
 413         ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 414
 415         /* Set total data segment count. */
 416         cmd_pkt->entry_count = (uint8_t)req_cnt;
 417         wmb();
 418
 419         /* Adjust ring index. */
 420         req->ring_index++;
 421         if (req->ring_index == req->length) {
 422                 req->ring_index = 0;
 423                 req->ring_ptr = req->ring;
 424         } else
 425                 req->ring_ptr++;
 426
 427         sp->flags |= SRB_DMA_VALID;
 428
 429         /* Set chip new ring index. */
 430         WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index);
 431         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
 432
 433         /* Manage unprocessed RIO/ZIO commands in response queue. */
 434         if (vha->flags.process_response_queue &&
 435             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 436                 qla2x00_process_response_queue(rsp);
 437
 438         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 439         return (QLA_SUCCESS);
 440
 441 queuing_error:
 442         if (tot_dsds)
 443                 scsi_dma_unmap(cmd);
 444
 445         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 446
 447         return (QLA_FUNCTION_FAILED);
 448 }
 449
 450 /**
 451  * qla2x00_start_iocbs() - Execute the IOCB command
 452  */
 453 void
 454 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 455 {
 456         struct qla_hw_data *ha = vha->hw;
 457         device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
 458
 459         if (IS_P3P_TYPE(ha)) {
 460                 qla82xx_start_iocbs(vha);
 461         } else {
 462                 /* Adjust ring index. */
 463                 req->ring_index++;
 464                 if (req->ring_index == req->length) {
 465                         req->ring_index = 0;
 466                         req->ring_ptr = req->ring;
 467                 } else
 468                         req->ring_ptr++;
 469
 470                 /* Set chip new ring index. */
 471                 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
 472                         WRT_REG_DWORD(req->req_q_in, req->ring_index);
 473                         RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
 474                 } else if (IS_QLAFX00(ha)) {
 475                         WRT_REG_DWORD(&reg->ispfx00.req_q_in, req->ring_index);
 476                         RD_REG_DWORD_RELAXED(&reg->ispfx00.req_q_in);
 477                         QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
 478                 } else if (IS_FWI2_CAPABLE(ha)) {
 479                         WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
 480                         RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
 481                 } else {
 482                         WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
 483                                 req->ring_index);
 484                         RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
 485                 }
 486         }
 487 }
 488
 489 /**
 490  * qla2x00_marker() - Send a marker IOCB to the firmware.
 491  * @ha: HA context
 492  * @loop_id: loop ID
 493  * @lun: LUN
 494  * @type: marker modifier
 495  *
 496  * Can be called from both normal and interrupt context.
 497  *
 498  * Returns non-zero if a failure occurred, else zero.
 499  */
 500 static int
 501 __qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
 502                         struct rsp_que *rsp, uint16_t loop_id,
 503                         uint64_t lun, uint8_t type)
 504 {
 505         mrk_entry_t *mrk;
 506         struct mrk_entry_24xx *mrk24 = NULL;
 507
 508         struct qla_hw_data *ha = vha->hw;
 509         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 510
 511         req = ha->req_q_map[0];
 512         mrk = (mrk_entry_t *)qla2x00_alloc_iocbs(vha, 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 req_que *req,
 544                 struct rsp_que *rsp, uint16_t loop_id, uint64_t lun,
 545                 uint8_t type)
 546 {
 547         int ret;
 548         unsigned long flags = 0;
 549
 550         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 551         ret = __qla2x00_marker(vha, req, rsp, loop_id, lun, type);
 552         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 553
 554         return (ret);
 555 }
 556
 557 /*
 558  * qla2x00_issue_marker
 559  *
 560  * Issue marker
 561  * Caller CAN have hardware lock held as specified by ha_locked parameter.
 562  * Might release it, then reaquire.
 563  */
 564 int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 565 {
 566         if (ha_locked) {
 567                 if (__qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
 568                                         MK_SYNC_ALL) != QLA_SUCCESS)
 569                         return QLA_FUNCTION_FAILED;
 570         } else {
 571                 if (qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
 572                                         MK_SYNC_ALL) != QLA_SUCCESS)
 573                         return QLA_FUNCTION_FAILED;
 574         }
 575         vha->marker_needed = 0;
 576
 577         return QLA_SUCCESS;
 578 }
 579
 580 static inline int
 581 qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
 582         uint16_t tot_dsds)
 583 {
 584         uint32_t *cur_dsd = NULL;
 585         scsi_qla_host_t *vha;
 586         struct qla_hw_data *ha;
 587         struct scsi_cmnd *cmd;
 588         struct  scatterlist *cur_seg;
 589         uint32_t *dsd_seg;
 590         void *next_dsd;
 591         uint8_t avail_dsds;
 592         uint8_t first_iocb = 1;
 593         uint32_t dsd_list_len;
 594         struct dsd_dma *dsd_ptr;
 595         struct ct6_dsd *ctx;
 596
 597         cmd = GET_CMD_SP(sp);
 598
 599         /* Update entry type to indicate Command Type 3 IOCB */
 600         *((uint32_t *)(&cmd_pkt->entry_type)) =
 601                 __constant_cpu_to_le32(COMMAND_TYPE_6);
 602
 603         /* No data transfer */
 604         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 605                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
 606                 return 0;
 607         }
 608
 609         vha = sp->fcport->vha;
 610         ha = vha->hw;
 611
 612         /* Set transfer direction */
 613         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 614                 cmd_pkt->control_flags =
 615                     __constant_cpu_to_le16(CF_WRITE_DATA);
 616                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 617                 vha->qla_stats.output_requests++;
 618         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 619                 cmd_pkt->control_flags =
 620                     __constant_cpu_to_le16(CF_READ_DATA);
 621                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 622                 vha->qla_stats.input_requests++;
 623         }
 624
 625         cur_seg = scsi_sglist(cmd);
 626         ctx = GET_CMD_CTX_SP(sp);
 627
 628         while (tot_dsds) {
 629                 avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
 630                     QLA_DSDS_PER_IOCB : tot_dsds;
 631                 tot_dsds -= avail_dsds;
 632                 dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
 633
 634                 dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
 635                     struct dsd_dma, list);
 636                 next_dsd = dsd_ptr->dsd_addr;
 637                 list_del(&dsd_ptr->list);
 638                 ha->gbl_dsd_avail--;
 639                 list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
 640                 ctx->dsd_use_cnt++;
 641                 ha->gbl_dsd_inuse++;
 642
 643                 if (first_iocb) {
 644                         first_iocb = 0;
 645                         dsd_seg = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
 646                         *dsd_seg++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
 647                         *dsd_seg++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
 648                         cmd_pkt->fcp_data_dseg_len = cpu_to_le32(dsd_list_len);
 649                 } else {
 650                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
 651                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
 652                         *cur_dsd++ = cpu_to_le32(dsd_list_len);
 653                 }
 654                 cur_dsd = (uint32_t *)next_dsd;
 655                 while (avail_dsds) {
 656                         dma_addr_t      sle_dma;
 657
 658                         sle_dma = sg_dma_address(cur_seg);
 659                         *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 660                         *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 661                         *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
 662                         cur_seg = sg_next(cur_seg);
 663                         avail_dsds--;
 664                 }
 665         }
 666
 667         /* Null termination */
 668         *cur_dsd++ =  0;
 669         *cur_dsd++ = 0;
 670         *cur_dsd++ = 0;
 671         cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
 672         return 0;
 673 }
 674
 675 /*
 676  * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 677  * for Command Type 6.
 678  *
 679  * @dsds: number of data segment decriptors needed
 680  *
 681  * Returns the number of dsd list needed to store @dsds.
 682  */
 683 inline uint16_t
 684 qla24xx_calc_dsd_lists(uint16_t dsds)
 685 {
 686         uint16_t dsd_lists = 0;
 687
 688         dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
 689         if (dsds % QLA_DSDS_PER_IOCB)
 690                 dsd_lists++;
 691         return dsd_lists;
 692 }
 693
 694
 695 /**
 696  * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 697  * IOCB types.
 698  *
 699  * @sp: SRB command to process
 700  * @cmd_pkt: Command type 3 IOCB
 701  * @tot_dsds: Total number of segments to transfer
 702  */
 703 inline void
 704 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 705     uint16_t tot_dsds)
 706 {
 707         uint16_t        avail_dsds;
 708         uint32_t        *cur_dsd;
 709         scsi_qla_host_t *vha;
 710         struct scsi_cmnd *cmd;
 711         struct scatterlist *sg;
 712         int i;
 713         struct req_que *req;
 714
 715         cmd = GET_CMD_SP(sp);
 716
 717         /* Update entry type to indicate Command Type 3 IOCB */
 718         *((uint32_t *)(&cmd_pkt->entry_type)) =
 719             __constant_cpu_to_le32(COMMAND_TYPE_7);
 720
 721         /* No data transfer */
 722         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 723                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
 724                 return;
 725         }
 726
 727         vha = sp->fcport->vha;
 728         req = vha->req;
 729
 730         /* Set transfer direction */
 731         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 732                 cmd_pkt->task_mgmt_flags =
 733                     __constant_cpu_to_le16(TMF_WRITE_DATA);
 734                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
 735                 vha->qla_stats.output_requests++;
 736         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 737                 cmd_pkt->task_mgmt_flags =
 738                     __constant_cpu_to_le16(TMF_READ_DATA);
 739                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
 740                 vha->qla_stats.input_requests++;
 741         }
 742
 743         /* One DSD is available in the Command Type 3 IOCB */
 744         avail_dsds = 1;
 745         cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
 746
 747         /* Load data segments */
 748
 749         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 750                 dma_addr_t      sle_dma;
 751                 cont_a64_entry_t *cont_pkt;
 752
 753                 /* Allocate additional continuation packets? */
 754                 if (avail_dsds == 0) {
 755                         /*
 756                          * Five DSDs are available in the Continuation
 757                          * Type 1 IOCB.
 758                          */
 759                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 760                         cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 761                         avail_dsds = 5;
 762                 }
 763
 764                 sle_dma = sg_dma_address(sg);
 765                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
 766                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
 767                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
 768                 avail_dsds--;
 769         }
 770 }
 771
 772 struct fw_dif_context {
 773         uint32_t ref_tag;
 774         uint16_t app_tag;
 775         uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
 776         uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
 777 };
 778
 779 /*
 780  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 781  *
 782  */
 783 static inline void
 784 qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 785     unsigned int protcnt)
 786 {
 787         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 788
 789         switch (scsi_get_prot_type(cmd)) {
 790         case SCSI_PROT_DIF_TYPE0:
 791                 /*
 792                  * No check for ql2xenablehba_err_chk, as it would be an
 793                  * I/O error if hba tag generation is not done.
 794                  */
 795                 pkt->ref_tag = cpu_to_le32((uint32_t)
 796                     (0xffffffff & scsi_get_lba(cmd)));
 797
 798                 if (!qla2x00_hba_err_chk_enabled(sp))
 799                         break;
 800
 801                 pkt->ref_tag_mask[0] = 0xff;
 802                 pkt->ref_tag_mask[1] = 0xff;
 803                 pkt->ref_tag_mask[2] = 0xff;
 804                 pkt->ref_tag_mask[3] = 0xff;
 805                 break;
 806
 807         /*
 808          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
 809          * match LBA in CDB + N
 810          */
 811         case SCSI_PROT_DIF_TYPE2:
 812                 pkt->app_tag = __constant_cpu_to_le16(0);
 813                 pkt->app_tag_mask[0] = 0x0;
 814                 pkt->app_tag_mask[1] = 0x0;
 815
 816                 pkt->ref_tag = cpu_to_le32((uint32_t)
 817                     (0xffffffff & scsi_get_lba(cmd)));
 818
 819                 if (!qla2x00_hba_err_chk_enabled(sp))
 820                         break;
 821
 822                 /* enable ALL bytes of the ref tag */
 823                 pkt->ref_tag_mask[0] = 0xff;
 824                 pkt->ref_tag_mask[1] = 0xff;
 825                 pkt->ref_tag_mask[2] = 0xff;
 826                 pkt->ref_tag_mask[3] = 0xff;
 827                 break;
 828
 829         /* For Type 3 protection: 16 bit GUARD only */
 830         case SCSI_PROT_DIF_TYPE3:
 831                 pkt->ref_tag_mask[0] = pkt->ref_tag_mask[1] =
 832                         pkt->ref_tag_mask[2] = pkt->ref_tag_mask[3] =
 833                                                                 0x00;
 834                 break;
 835
 836         /*
 837          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
 838          * 16 bit app tag.
 839          */
 840         case SCSI_PROT_DIF_TYPE1:
 841                 pkt->ref_tag = cpu_to_le32((uint32_t)
 842                     (0xffffffff & scsi_get_lba(cmd)));
 843                 pkt->app_tag = __constant_cpu_to_le16(0);
 844                 pkt->app_tag_mask[0] = 0x0;
 845                 pkt->app_tag_mask[1] = 0x0;
 846
 847                 if (!qla2x00_hba_err_chk_enabled(sp))
 848                         break;
 849
 850                 /* enable ALL bytes of the ref tag */
 851                 pkt->ref_tag_mask[0] = 0xff;
 852                 pkt->ref_tag_mask[1] = 0xff;
 853                 pkt->ref_tag_mask[2] = 0xff;
 854                 pkt->ref_tag_mask[3] = 0xff;
 855                 break;
 856         }
 857 }
 858
 859 struct qla2_sgx {
 860         dma_addr_t              dma_addr;       /* OUT */
 861         uint32_t                dma_len;        /* OUT */
 862
 863         uint32_t                tot_bytes;      /* IN */
 864         struct scatterlist      *cur_sg;        /* IN */
 865
 866         /* for book keeping, bzero on initial invocation */
 867         uint32_t                bytes_consumed;
 868         uint32_t                num_bytes;
 869         uint32_t                tot_partial;
 870
 871         /* for debugging */
 872         uint32_t                num_sg;
 873         srb_t                   *sp;
 874 };
 875
 876 static int
 877 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 878         uint32_t *partial)
 879 {
 880         struct scatterlist *sg;
 881         uint32_t cumulative_partial, sg_len;
 882         dma_addr_t sg_dma_addr;
 883
 884         if (sgx->num_bytes == sgx->tot_bytes)
 885                 return 0;
 886
 887         sg = sgx->cur_sg;
 888         cumulative_partial = sgx->tot_partial;
 889
 890         sg_dma_addr = sg_dma_address(sg);
 891         sg_len = sg_dma_len(sg);
 892
 893         sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 894
 895         if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
 896                 sgx->dma_len = (blk_sz - cumulative_partial);
 897                 sgx->tot_partial = 0;
 898                 sgx->num_bytes += blk_sz;
 899                 *partial = 0;
 900         } else {
 901                 sgx->dma_len = sg_len - sgx->bytes_consumed;
 902                 sgx->tot_partial += sgx->dma_len;
 903                 *partial = 1;
 904         }
 905
 906         sgx->bytes_consumed += sgx->dma_len;
 907
 908         if (sg_len == sgx->bytes_consumed) {
 909                 sg = sg_next(sg);
 910                 sgx->num_sg++;
 911                 sgx->cur_sg = sg;
 912                 sgx->bytes_consumed = 0;
 913         }
 914
 915         return 1;
 916 }
 917
 918 int
 919 qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
 920         uint32_t *dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
 921 {
 922         void *next_dsd;
 923         uint8_t avail_dsds = 0;
 924         uint32_t dsd_list_len;
 925         struct dsd_dma *dsd_ptr;
 926         struct scatterlist *sg_prot;
 927         uint32_t *cur_dsd = dsd;
 928         uint16_t        used_dsds = tot_dsds;
 929
 930         uint32_t        prot_int; /* protection interval */
 931         uint32_t        partial;
 932         struct qla2_sgx sgx;
 933         dma_addr_t      sle_dma;
 934         uint32_t        sle_dma_len, tot_prot_dma_len = 0;
 935         struct scsi_cmnd *cmd;
 936         struct scsi_qla_host *vha;
 937
 938         memset(&sgx, 0, sizeof(struct qla2_sgx));
 939         if (sp) {
 940                 vha = sp->fcport->vha;
 941                 cmd = GET_CMD_SP(sp);
 942                 prot_int = cmd->device->sector_size;
 943
 944                 sgx.tot_bytes = scsi_bufflen(cmd);
 945                 sgx.cur_sg = scsi_sglist(cmd);
 946                 sgx.sp = sp;
 947
 948                 sg_prot = scsi_prot_sglist(cmd);
 949         } else if (tc) {
 950                 vha = tc->vha;
 951                 prot_int      = tc->blk_sz;
 952                 sgx.tot_bytes = tc->bufflen;
 953                 sgx.cur_sg    = tc->sg;
 954                 sg_prot       = tc->prot_sg;
 955         } else {
 956                 BUG();
 957                 return 1;
 958         }
 959
 960         while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 961
 962                 sle_dma = sgx.dma_addr;
 963                 sle_dma_len = sgx.dma_len;
 964 alloc_and_fill:
 965                 /* Allocate additional continuation packets? */
 966                 if (avail_dsds == 0) {
 967                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 968                                         QLA_DSDS_PER_IOCB : used_dsds;
 969                         dsd_list_len = (avail_dsds + 1) * 12;
 970                         used_dsds -= avail_dsds;
 971
 972                         /* allocate tracking DS */
 973                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 974                         if (!dsd_ptr)
 975                                 return 1;
 976
 977                         /* allocate new list */
 978                         dsd_ptr->dsd_addr = next_dsd =
 979                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 980                                 &dsd_ptr->dsd_list_dma);
 981
 982                         if (!next_dsd) {
 983                                 /*
 984                                  * Need to cleanup only this dsd_ptr, rest
 985                                  * will be done by sp_free_dma()
 986                                  */
 987                                 kfree(dsd_ptr);
 988                                 return 1;
 989                         }
 990
 991                         if (sp) {
 992                                 list_add_tail(&dsd_ptr->list,
 993                                     &((struct crc_context *)
 994                                             sp->u.scmd.ctx)->dsd_list);
 995
 996                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
 997                         } else {
 998                                 list_add_tail(&dsd_ptr->list,
 999                                     &(tc->ctx->dsd_list));
1000                                 tc->ctx_dsd_alloced = 1;
1001                         }
1002
1003
1004                         /* add new list to cmd iocb or last list */
1005                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1006                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1007                         *cur_dsd++ = dsd_list_len;
1008                         cur_dsd = (uint32_t *)next_dsd;
1009                 }
1010                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
1011                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
1012                 *cur_dsd++ = cpu_to_le32(sle_dma_len);
1013                 avail_dsds--;
1014
1015                 if (partial == 0) {
1016                         /* Got a full protection interval */
1017                         sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
1018                         sle_dma_len = 8;
1019
1020                         tot_prot_dma_len += sle_dma_len;
1021                         if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
1022                                 tot_prot_dma_len = 0;
1023                                 sg_prot = sg_next(sg_prot);
1024                         }
1025
1026                         partial = 1; /* So as to not re-enter this block */
1027                         goto alloc_and_fill;
1028                 }
1029         }
1030         /* Null termination */
1031         *cur_dsd++ = 0;
1032         *cur_dsd++ = 0;
1033         *cur_dsd++ = 0;
1034         return 0;
1035 }
1036
1037 int
1038 qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, uint32_t *dsd,
1039         uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1040 {
1041         void *next_dsd;
1042         uint8_t avail_dsds = 0;
1043         uint32_t dsd_list_len;
1044         struct dsd_dma *dsd_ptr;
1045         struct scatterlist *sg, *sgl;
1046         uint32_t *cur_dsd = dsd;
1047         int     i;
1048         uint16_t        used_dsds = tot_dsds;
1049         struct scsi_cmnd *cmd;
1050         struct scsi_qla_host *vha;
1051
1052         if (sp) {
1053                 cmd = GET_CMD_SP(sp);
1054                 sgl = scsi_sglist(cmd);
1055                 vha = sp->fcport->vha;
1056         } else if (tc) {
1057                 sgl = tc->sg;
1058                 vha = tc->vha;
1059         } else {
1060                 BUG();
1061                 return 1;
1062         }
1063
1064
1065         for_each_sg(sgl, sg, tot_dsds, i) {
1066                 dma_addr_t      sle_dma;
1067
1068                 /* Allocate additional continuation packets? */
1069                 if (avail_dsds == 0) {
1070                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1071                                         QLA_DSDS_PER_IOCB : used_dsds;
1072                         dsd_list_len = (avail_dsds + 1) * 12;
1073                         used_dsds -= avail_dsds;
1074
1075                         /* allocate tracking DS */
1076                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
1077                         if (!dsd_ptr)
1078                                 return 1;
1079
1080                         /* allocate new list */
1081                         dsd_ptr->dsd_addr = next_dsd =
1082                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1083                                 &dsd_ptr->dsd_list_dma);
1084
1085                         if (!next_dsd) {
1086                                 /*
1087                                  * Need to cleanup only this dsd_ptr, rest
1088                                  * will be done by sp_free_dma()
1089                                  */
1090                                 kfree(dsd_ptr);
1091                                 return 1;
1092                         }
1093
1094                         if (sp) {
1095                                 list_add_tail(&dsd_ptr->list,
1096                                     &((struct crc_context *)
1097                                             sp->u.scmd.ctx)->dsd_list);
1098
1099                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
1100                         } else {
1101                                 list_add_tail(&dsd_ptr->list,
1102                                     &(tc->ctx->dsd_list));
1103                                 tc->ctx_dsd_alloced = 1;
1104                         }
1105
1106                         /* add new list to cmd iocb or last list */
1107                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1108                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1109                         *cur_dsd++ = dsd_list_len;
1110                         cur_dsd = (uint32_t *)next_dsd;
1111                 }
1112                 sle_dma = sg_dma_address(sg);
1113
1114                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
1115                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
1116                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
1117                 avail_dsds--;
1118
1119         }
1120         /* Null termination */
1121         *cur_dsd++ = 0;
1122         *cur_dsd++ = 0;
1123         *cur_dsd++ = 0;
1124         return 0;
1125 }
1126
1127 int
1128 qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
1129         uint32_t *dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1130 {
1131         void *next_dsd;
1132         uint8_t avail_dsds = 0;
1133         uint32_t dsd_list_len;
1134         struct dsd_dma *dsd_ptr;
1135         struct scatterlist *sg, *sgl;
1136         int     i;
1137         struct scsi_cmnd *cmd;
1138         uint32_t *cur_dsd = dsd;
1139         uint16_t used_dsds = tot_dsds;
1140         struct scsi_qla_host *vha;
1141
1142         if (sp) {
1143                 cmd = GET_CMD_SP(sp);
1144                 sgl = scsi_prot_sglist(cmd);
1145                 vha = sp->fcport->vha;
1146         } else if (tc) {
1147                 vha = tc->vha;
1148                 sgl = tc->prot_sg;
1149         } else {
1150                 BUG();
1151                 return 1;
1152         }
1153
1154         ql_dbg(ql_dbg_tgt, vha, 0xe021,
1155                 "%s: enter\n", __func__);
1156
1157         for_each_sg(sgl, sg, tot_dsds, i) {
1158                 dma_addr_t      sle_dma;
1159
1160                 /* Allocate additional continuation packets? */
1161                 if (avail_dsds == 0) {
1162                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1163                                                 QLA_DSDS_PER_IOCB : used_dsds;
1164                         dsd_list_len = (avail_dsds + 1) * 12;
1165                         used_dsds -= avail_dsds;
1166
1167                         /* allocate tracking DS */
1168                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
1169                         if (!dsd_ptr)
1170                                 return 1;
1171
1172                         /* allocate new list */
1173                         dsd_ptr->dsd_addr = next_dsd =
1174                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1175                                 &dsd_ptr->dsd_list_dma);
1176
1177                         if (!next_dsd) {
1178                                 /*
1179                                  * Need to cleanup only this dsd_ptr, rest
1180                                  * will be done by sp_free_dma()
1181                                  */
1182                                 kfree(dsd_ptr);
1183                                 return 1;
1184                         }
1185
1186                         if (sp) {
1187                                 list_add_tail(&dsd_ptr->list,
1188                                     &((struct crc_context *)
1189                                             sp->u.scmd.ctx)->dsd_list);
1190
1191                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
1192                         } else {
1193                                 list_add_tail(&dsd_ptr->list,
1194                                     &(tc->ctx->dsd_list));
1195                                 tc->ctx_dsd_alloced = 1;
1196                         }
1197
1198                         /* add new list to cmd iocb or last list */
1199                         *cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
1200                         *cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
1201                         *cur_dsd++ = dsd_list_len;
1202                         cur_dsd = (uint32_t *)next_dsd;
1203                 }
1204                 sle_dma = sg_dma_address(sg);
1205
1206                 *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
1207                 *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
1208                 *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
1209
1210                 avail_dsds--;
1211         }
1212         /* Null termination */
1213         *cur_dsd++ = 0;
1214         *cur_dsd++ = 0;
1215         *cur_dsd++ = 0;
1216         return 0;
1217 }
1218
1219 /**
1220  * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
1221  *                                                      Type 6 IOCB types.
1222  *
1223  * @sp: SRB command to process
1224  * @cmd_pkt: Command type 3 IOCB
1225  * @tot_dsds: Total number of segments to transfer
1226  */
1227 static inline int
1228 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
1229     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
1230 {
1231         uint32_t                *cur_dsd, *fcp_dl;
1232         scsi_qla_host_t         *vha;
1233         struct scsi_cmnd        *cmd;
1234         int                     sgc;
1235         uint32_t                total_bytes = 0;
1236         uint32_t                data_bytes;
1237         uint32_t                dif_bytes;
1238         uint8_t                 bundling = 1;
1239         uint16_t                blk_size;
1240         uint8_t                 *clr_ptr;
1241         struct crc_context      *crc_ctx_pkt = NULL;
1242         struct qla_hw_data      *ha;
1243         uint8_t                 additional_fcpcdb_len;
1244         uint16_t                fcp_cmnd_len;
1245         struct fcp_cmnd         *fcp_cmnd;
1246         dma_addr_t              crc_ctx_dma;
1247
1248         cmd = GET_CMD_SP(sp);
1249
1250         sgc = 0;
1251         /* Update entry type to indicate Command Type CRC_2 IOCB */
1252         *((uint32_t *)(&cmd_pkt->entry_type)) =
1253             __constant_cpu_to_le32(COMMAND_TYPE_CRC_2);
1254
1255         vha = sp->fcport->vha;
1256         ha = vha->hw;
1257
1258         /* No data transfer */
1259         data_bytes = scsi_bufflen(cmd);
1260         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1261                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
1262                 return QLA_SUCCESS;
1263         }
1264
1265         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
1266
1267         /* Set transfer direction */
1268         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1269                 cmd_pkt->control_flags =
1270                     __constant_cpu_to_le16(CF_WRITE_DATA);
1271         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
1272                 cmd_pkt->control_flags =
1273                     __constant_cpu_to_le16(CF_READ_DATA);
1274         }
1275
1276         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1277             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
1278             (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
1279             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1280                 bundling = 0;
1281
1282         /* Allocate CRC context from global pool */
1283         crc_ctx_pkt = sp->u.scmd.ctx =
1284             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1285
1286         if (!crc_ctx_pkt)
1287                 goto crc_queuing_error;
1288
1289         /* Zero out CTX area. */
1290         clr_ptr = (uint8_t *)crc_ctx_pkt;
1291         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
1292
1293         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
1294
1295         sp->flags |= SRB_CRC_CTX_DMA_VALID;
1296
1297         /* Set handle */
1298         crc_ctx_pkt->handle = cmd_pkt->handle;
1299
1300         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
1301
1302         qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1303             &crc_ctx_pkt->ref_tag, tot_prot_dsds);
1304
1305         cmd_pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
1306         cmd_pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
1307         cmd_pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
1308
1309         /* Determine SCSI command length -- align to 4 byte boundary */
1310         if (cmd->cmd_len > 16) {
1311                 additional_fcpcdb_len = cmd->cmd_len - 16;
1312                 if ((cmd->cmd_len % 4) != 0) {
1313                         /* SCSI cmd > 16 bytes must be multiple of 4 */
1314                         goto crc_queuing_error;
1315                 }
1316                 fcp_cmnd_len = 12 + cmd->cmd_len + 4;
1317         } else {
1318                 additional_fcpcdb_len = 0;
1319                 fcp_cmnd_len = 12 + 16 + 4;
1320         }
1321
1322         fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
1323
1324         fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
1325         if (cmd->sc_data_direction == DMA_TO_DEVICE)
1326                 fcp_cmnd->additional_cdb_len |= 1;
1327         else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1328                 fcp_cmnd->additional_cdb_len |= 2;
1329
1330         int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1331         memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
1332         cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
1333         cmd_pkt->fcp_cmnd_dseg_address[0] = cpu_to_le32(
1334             LSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
1335         cmd_pkt->fcp_cmnd_dseg_address[1] = cpu_to_le32(
1336             MSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
1337         fcp_cmnd->task_management = 0;
1338         fcp_cmnd->task_attribute = TSK_SIMPLE;
1339
1340         cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
1341
1342         /* Compute dif len and adjust data len to incude protection */
1343         dif_bytes = 0;
1344         blk_size = cmd->device->sector_size;
1345         dif_bytes = (data_bytes / blk_size) * 8;
1346
1347         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1348         case SCSI_PROT_READ_INSERT:
1349         case SCSI_PROT_WRITE_STRIP:
1350             total_bytes = data_bytes;
1351             data_bytes += dif_bytes;
1352             break;
1353
1354         case SCSI_PROT_READ_STRIP:
1355         case SCSI_PROT_WRITE_INSERT:
1356         case SCSI_PROT_READ_PASS:
1357         case SCSI_PROT_WRITE_PASS:
1358             total_bytes = data_bytes + dif_bytes;
1359             break;
1360         default:
1361             BUG();
1362         }
1363
1364         if (!qla2x00_hba_err_chk_enabled(sp))
1365                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1366         /* HBA error checking enabled */
1367         else if (IS_PI_UNINIT_CAPABLE(ha)) {
1368                 if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
1369                     || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1370                         SCSI_PROT_DIF_TYPE2))
1371                         fw_prot_opts |= BIT_10;
1372                 else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1373                     SCSI_PROT_DIF_TYPE3)
1374                         fw_prot_opts |= BIT_11;
1375         }
1376
1377         if (!bundling) {
1378                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
1379         } else {
1380                 /*
1381                  * Configure Bundling if we need to fetch interlaving
1382                  * protection PCI accesses
1383                  */
1384                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
1385                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
1386                 crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
1387                                                         tot_prot_dsds);
1388                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
1389         }
1390
1391         /* Finish the common fields of CRC pkt */
1392         crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
1393         crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
1394         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
1395         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
1396         /* Fibre channel byte count */
1397         cmd_pkt->byte_count = cpu_to_le32(total_bytes);
1398         fcp_dl = (uint32_t *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
1399             additional_fcpcdb_len);
1400         *fcp_dl = htonl(total_bytes);
1401
1402         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1403                 cmd_pkt->byte_count = __constant_cpu_to_le32(0);
1404                 return QLA_SUCCESS;
1405         }
1406         /* Walks data segments */
1407
1408         cmd_pkt->control_flags |=
1409             __constant_cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1410
1411         if (!bundling && tot_prot_dsds) {
1412                 if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
1413                         cur_dsd, tot_dsds, NULL))
1414                         goto crc_queuing_error;
1415         } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1416                         (tot_dsds - tot_prot_dsds), NULL))
1417                 goto crc_queuing_error;
1418
1419         if (bundling && tot_prot_dsds) {
1420                 /* Walks dif segments */
1421                 cmd_pkt->control_flags |=
1422                         __constant_cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
1423                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
1424                 if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
1425                                 tot_prot_dsds, NULL))
1426                         goto crc_queuing_error;
1427         }
1428         return QLA_SUCCESS;
1429
1430 crc_queuing_error:
1431         /* Cleanup will be performed by the caller */
1432
1433         return QLA_FUNCTION_FAILED;
1434 }
1435
1436 /**
1437  * qla24xx_start_scsi() - Send a SCSI command to the ISP
1438  * @sp: command to send to the ISP
1439  *
1440  * Returns non-zero if a failure occurred, else zero.
1441  */
1442 int
1443 qla24xx_start_scsi(srb_t *sp)
1444 {
1445         int             ret, nseg;
1446         unsigned long   flags;
1447         uint32_t        *clr_ptr;
1448         uint32_t        index;
1449         uint32_t        handle;
1450         struct cmd_type_7 *cmd_pkt;
1451         uint16_t        cnt;
1452         uint16_t        req_cnt;
1453         uint16_t        tot_dsds;
1454         struct req_que *req = NULL;
1455         struct rsp_que *rsp = NULL;
1456         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1457         struct scsi_qla_host *vha = sp->fcport->vha;
1458         struct qla_hw_data *ha = vha->hw;
1459
1460         /* Setup device pointers. */
1461         ret = 0;
1462
1463         qla25xx_set_que(sp, &rsp);
1464         req = vha->req;
1465
1466         /* So we know we haven't pci_map'ed anything yet */
1467         tot_dsds = 0;
1468
1469         /* Send marker if required */
1470         if (vha->marker_needed != 0) {
1471                 if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
1472                     QLA_SUCCESS)
1473                         return QLA_FUNCTION_FAILED;
1474                 vha->marker_needed = 0;
1475         }
1476
1477         /* Acquire ring specific lock */
1478         spin_lock_irqsave(&ha->hardware_lock, flags);
1479
1480         /* Check for room in outstanding command list. */
1481         handle = req->current_outstanding_cmd;
1482         for (index = 1; index < req->num_outstanding_cmds; index++) {
1483                 handle++;
1484                 if (handle == req->num_outstanding_cmds)
1485                         handle = 1;
1486                 if (!req->outstanding_cmds[handle])
1487                         break;
1488         }
1489         if (index == req->num_outstanding_cmds)
1490                 goto queuing_error;
1491
1492         /* Map the sg table so we have an accurate count of sg entries needed */
1493         if (scsi_sg_count(cmd)) {
1494                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1495                     scsi_sg_count(cmd), cmd->sc_data_direction);
1496                 if (unlikely(!nseg))
1497                         goto queuing_error;
1498         } else
1499                 nseg = 0;
1500
1501         tot_dsds = nseg;
1502         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1503         if (req->cnt < (req_cnt + 2)) {
1504                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1505                     RD_REG_DWORD_RELAXED(req->req_q_out);
1506                 if (req->ring_index < cnt)
1507                         req->cnt = cnt - req->ring_index;
1508                 else
1509                         req->cnt = req->length -
1510                                 (req->ring_index - cnt);
1511                 if (req->cnt < (req_cnt + 2))
1512                         goto queuing_error;
1513         }
1514
1515         /* Build command packet. */
1516         req->current_outstanding_cmd = handle;
1517         req->outstanding_cmds[handle] = sp;
1518         sp->handle = handle;
1519         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1520         req->cnt -= req_cnt;
1521
1522         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1523         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1524
1525         /* Zero out remaining portion of packet. */
1526         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1527         clr_ptr = (uint32_t *)cmd_pkt + 2;
1528         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1529         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1530
1531         /* Set NPORT-ID and LUN number*/
1532         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1533         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1534         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1535         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1536         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
1537
1538         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1539         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1540
1541         cmd_pkt->task = TSK_SIMPLE;
1542
1543         /* Load SCSI command packet. */
1544         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1545         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1546
1547         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1548
1549         /* Build IOCB segments */
1550         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
1551
1552         /* Set total data segment count. */
1553         cmd_pkt->entry_count = (uint8_t)req_cnt;
1554         /* Specify response queue number where completion should happen */
1555         cmd_pkt->entry_status = (uint8_t) rsp->id;
1556         wmb();
1557         /* Adjust ring index. */
1558         req->ring_index++;
1559         if (req->ring_index == req->length) {
1560                 req->ring_index = 0;
1561                 req->ring_ptr = req->ring;
1562         } else
1563                 req->ring_ptr++;
1564
1565         sp->flags |= SRB_DMA_VALID;
1566
1567         /* Set chip new ring index. */
1568         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1569         RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
1570
1571         /* Manage unprocessed RIO/ZIO commands in response queue. */
1572         if (vha->flags.process_response_queue &&
1573                 rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1574                 qla24xx_process_response_queue(vha, rsp);
1575
1576         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1577         return QLA_SUCCESS;
1578
1579 queuing_error:
1580         if (tot_dsds)
1581                 scsi_dma_unmap(cmd);
1582
1583         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1584
1585         return QLA_FUNCTION_FAILED;
1586 }
1587
1588 /**
1589  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1590  * @sp: command to send to the ISP
1591  *
1592  * Returns non-zero if a failure occurred, else zero.
1593  */
1594 int
1595 qla24xx_dif_start_scsi(srb_t *sp)
1596 {
1597         int                     nseg;
1598         unsigned long           flags;
1599         uint32_t                *clr_ptr;
1600         uint32_t                index;
1601         uint32_t                handle;
1602         uint16_t                cnt;
1603         uint16_t                req_cnt = 0;
1604         uint16_t                tot_dsds;
1605         uint16_t                tot_prot_dsds;
1606         uint16_t                fw_prot_opts = 0;
1607         struct req_que          *req = NULL;
1608         struct rsp_que          *rsp = NULL;
1609         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1610         struct scsi_qla_host    *vha = sp->fcport->vha;
1611         struct qla_hw_data      *ha = vha->hw;
1612         struct cmd_type_crc_2   *cmd_pkt;
1613         uint32_t                status = 0;
1614
1615 #define QDSS_GOT_Q_SPACE        BIT_0
1616
1617         /* Only process protection or >16 cdb in this routine */
1618         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1619                 if (cmd->cmd_len <= 16)
1620                         return qla24xx_start_scsi(sp);
1621         }
1622
1623         /* Setup device pointers. */
1624
1625         qla25xx_set_que(sp, &rsp);
1626         req = vha->req;
1627
1628         /* So we know we haven't pci_map'ed anything yet */
1629         tot_dsds = 0;
1630
1631         /* Send marker if required */
1632         if (vha->marker_needed != 0) {
1633                 if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
1634                     QLA_SUCCESS)
1635                         return QLA_FUNCTION_FAILED;
1636                 vha->marker_needed = 0;
1637         }
1638
1639         /* Acquire ring specific lock */
1640         spin_lock_irqsave(&ha->hardware_lock, flags);
1641
1642         /* Check for room in outstanding command list. */
1643         handle = req->current_outstanding_cmd;
1644         for (index = 1; index < req->num_outstanding_cmds; index++) {
1645                 handle++;
1646                 if (handle == req->num_outstanding_cmds)
1647                         handle = 1;
1648                 if (!req->outstanding_cmds[handle])
1649                         break;
1650         }
1651
1652         if (index == req->num_outstanding_cmds)
1653                 goto queuing_error;
1654
1655         /* Compute number of required data segments */
1656         /* Map the sg table so we have an accurate count of sg entries needed */
1657         if (scsi_sg_count(cmd)) {
1658                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1659                     scsi_sg_count(cmd), cmd->sc_data_direction);
1660                 if (unlikely(!nseg))
1661                         goto queuing_error;
1662                 else
1663                         sp->flags |= SRB_DMA_VALID;
1664
1665                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1666                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1667                         struct qla2_sgx sgx;
1668                         uint32_t        partial;
1669
1670                         memset(&sgx, 0, sizeof(struct qla2_sgx));
1671                         sgx.tot_bytes = scsi_bufflen(cmd);
1672                         sgx.cur_sg = scsi_sglist(cmd);
1673                         sgx.sp = sp;
1674
1675                         nseg = 0;
1676                         while (qla24xx_get_one_block_sg(
1677                             cmd->device->sector_size, &sgx, &partial))
1678                                 nseg++;
1679                 }
1680         } else
1681                 nseg = 0;
1682
1683         /* number of required data segments */
1684         tot_dsds = nseg;
1685
1686         /* Compute number of required protection segments */
1687         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1688                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1689                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1690                 if (unlikely(!nseg))
1691                         goto queuing_error;
1692                 else
1693                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
1694
1695                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1696                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1697                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1698                 }
1699         } else {
1700                 nseg = 0;
1701         }
1702
1703         req_cnt = 1;
1704         /* Total Data and protection sg segment(s) */
1705         tot_prot_dsds = nseg;
1706         tot_dsds += nseg;
1707         if (req->cnt < (req_cnt + 2)) {
1708                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
1709                     RD_REG_DWORD_RELAXED(req->req_q_out);
1710                 if (req->ring_index < cnt)
1711                         req->cnt = cnt - req->ring_index;
1712                 else
1713                         req->cnt = req->length -
1714                                 (req->ring_index - cnt);
1715                 if (req->cnt < (req_cnt + 2))
1716                         goto queuing_error;
1717         }
1718
1719         status |= QDSS_GOT_Q_SPACE;
1720
1721         /* Build header part of command packet (excluding the OPCODE). */
1722         req->current_outstanding_cmd = handle;
1723         req->outstanding_cmds[handle] = sp;
1724         sp->handle = handle;
1725         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1726         req->cnt -= req_cnt;
1727
1728         /* Fill-in common area */
1729         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1730         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1731
1732         clr_ptr = (uint32_t *)cmd_pkt + 2;
1733         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1734
1735         /* Set NPORT-ID and LUN number*/
1736         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1737         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1738         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1739         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1740
1741         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1742         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1743
1744         /* Total Data and protection segment(s) */
1745         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1746
1747         /* Build IOCB segments and adjust for data protection segments */
1748         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1749             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1750                 QLA_SUCCESS)
1751                 goto queuing_error;
1752
1753         cmd_pkt->entry_count = (uint8_t)req_cnt;
1754         /* Specify response queue number where completion should happen */
1755         cmd_pkt->entry_status = (uint8_t) rsp->id;
1756         cmd_pkt->timeout = __constant_cpu_to_le16(0);
1757         wmb();
1758
1759         /* Adjust ring index. */
1760         req->ring_index++;
1761         if (req->ring_index == req->length) {
1762                 req->ring_index = 0;
1763                 req->ring_ptr = req->ring;
1764         } else
1765                 req->ring_ptr++;
1766
1767         /* Set chip new ring index. */
1768         WRT_REG_DWORD(req->req_q_in, req->ring_index);
1769         RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
1770
1771         /* Manage unprocessed RIO/ZIO commands in response queue. */
1772         if (vha->flags.process_response_queue &&
1773             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1774                 qla24xx_process_response_queue(vha, rsp);
1775
1776         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1777
1778         return QLA_SUCCESS;
1779
1780 queuing_error:
1781         if (status & QDSS_GOT_Q_SPACE) {
1782                 req->outstanding_cmds[handle] = NULL;
1783                 req->cnt += req_cnt;
1784         }
1785         /* Cleanup will be performed by the caller (queuecommand) */
1786
1787         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1788         return QLA_FUNCTION_FAILED;
1789 }
1790
1791
1792 static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
1793 {
1794         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1795         struct qla_hw_data *ha = sp->fcport->vha->hw;
1796         int affinity = cmd->request->cpu;
1797
1798         if (ha->flags.cpu_affinity_enabled && affinity >= 0 &&
1799                 affinity < ha->max_rsp_queues - 1)
1800                 *rsp = ha->rsp_q_map[affinity + 1];
1801          else
1802                 *rsp = ha->rsp_q_map[0];
1803 }
1804
1805 /* Generic Control-SRB manipulation functions. */
1806
1807 /* hardware_lock assumed to be held. */
1808 void *
1809 qla2x00_alloc_iocbs_ready(scsi_qla_host_t *vha, srb_t *sp)
1810 {
1811         if (qla2x00_reset_active(vha))
1812                 return NULL;
1813
1814         return qla2x00_alloc_iocbs(vha, sp);
1815 }
1816
1817 void *
1818 qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
1819 {
1820         struct qla_hw_data *ha = vha->hw;
1821         struct req_que *req = ha->req_q_map[0];
1822         device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
1823         uint32_t index, handle;
1824         request_t *pkt;
1825         uint16_t cnt, req_cnt;
1826
1827         pkt = NULL;
1828         req_cnt = 1;
1829         handle = 0;
1830
1831         if (!sp)
1832                 goto skip_cmd_array;
1833
1834         /* Check for room in outstanding command list. */
1835         handle = req->current_outstanding_cmd;
1836         for (index = 1; index < req->num_outstanding_cmds; index++) {
1837                 handle++;
1838                 if (handle == req->num_outstanding_cmds)
1839                         handle = 1;
1840                 if (!req->outstanding_cmds[handle])
1841                         break;
1842         }
1843         if (index == req->num_outstanding_cmds) {
1844                 ql_log(ql_log_warn, vha, 0x700b,
1845                     "No room on outstanding cmd array.\n");
1846                 goto queuing_error;
1847         }
1848
1849         /* Prep command array. */
1850         req->current_outstanding_cmd = handle;
1851         req->outstanding_cmds[handle] = sp;
1852         sp->handle = handle;
1853
1854         /* Adjust entry-counts as needed. */
1855         if (sp->type != SRB_SCSI_CMD)
1856                 req_cnt = sp->iocbs;
1857
1858 skip_cmd_array:
1859         /* Check for room on request queue. */
1860         if (req->cnt < req_cnt + 2) {
1861                 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha))
1862                         cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
1863                 else if (IS_P3P_TYPE(ha))
1864                         cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
1865                 else if (IS_FWI2_CAPABLE(ha))
1866                         cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
1867                 else if (IS_QLAFX00(ha))
1868                         cnt = RD_REG_DWORD(&reg->ispfx00.req_q_out);
1869                 else
1870                         cnt = qla2x00_debounce_register(
1871                             ISP_REQ_Q_OUT(ha, &reg->isp));
1872
1873                 if  (req->ring_index < cnt)
1874                         req->cnt = cnt - req->ring_index;
1875                 else
1876                         req->cnt = req->length -
1877                             (req->ring_index - cnt);
1878         }
1879         if (req->cnt < req_cnt + 2)
1880                 goto queuing_error;
1881
1882         /* Prep packet */
1883         req->cnt -= req_cnt;
1884         pkt = req->ring_ptr;
1885         memset(pkt, 0, REQUEST_ENTRY_SIZE);
1886         if (IS_QLAFX00(ha)) {
1887                 WRT_REG_BYTE((void __iomem *)&pkt->entry_count, req_cnt);
1888                 WRT_REG_WORD((void __iomem *)&pkt->handle, handle);
1889         } else {
1890                 pkt->entry_count = req_cnt;
1891                 pkt->handle = handle;
1892         }
1893
1894 queuing_error:
1895         return pkt;
1896 }
1897
1898 static void
1899 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
1900 {
1901         struct srb_iocb *lio = &sp->u.iocb_cmd;
1902
1903         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
1904         logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
1905         if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
1906                 logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
1907         if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
1908                 logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
1909         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1910         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
1911         logio->port_id[1] = sp->fcport->d_id.b.area;
1912         logio->port_id[2] = sp->fcport->d_id.b.domain;
1913         logio->vp_index = sp->fcport->vha->vp_idx;
1914 }
1915
1916 static void
1917 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
1918 {
1919         struct qla_hw_data *ha = sp->fcport->vha->hw;
1920         struct srb_iocb *lio = &sp->u.iocb_cmd;
1921         uint16_t opts;
1922
1923         mbx->entry_type = MBX_IOCB_TYPE;
1924         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
1925         mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
1926         opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
1927         opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
1928         if (HAS_EXTENDED_IDS(ha)) {
1929                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
1930                 mbx->mb10 = cpu_to_le16(opts);
1931         } else {
1932                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
1933         }
1934         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
1935         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
1936             sp->fcport->d_id.b.al_pa);
1937         mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
1938 }
1939
1940 static void
1941 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
1942 {
1943         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
1944         logio->control_flags =
1945             cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
1946         if (!sp->fcport->tgt_session ||
1947             !sp->fcport->tgt_session->keep_nport_handle)
1948                 logio->control_flags |= cpu_to_le16(LCF_FREE_NPORT);
1949         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1950         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
1951         logio->port_id[1] = sp->fcport->d_id.b.area;
1952         logio->port_id[2] = sp->fcport->d_id.b.domain;
1953         logio->vp_index = sp->fcport->vha->vp_idx;
1954 }
1955
1956 static void
1957 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
1958 {
1959         struct qla_hw_data *ha = sp->fcport->vha->hw;
1960
1961         mbx->entry_type = MBX_IOCB_TYPE;
1962         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
1963         mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
1964         mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
1965             cpu_to_le16(sp->fcport->loop_id):
1966             cpu_to_le16(sp->fcport->loop_id << 8);
1967         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
1968         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
1969             sp->fcport->d_id.b.al_pa);
1970         mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
1971         /* Implicit: mbx->mbx10 = 0. */
1972 }
1973
1974 static void
1975 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
1976 {
1977         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
1978         logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
1979         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1980         logio->vp_index = sp->fcport->vha->vp_idx;
1981 }
1982
1983 static void
1984 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
1985 {
1986         struct qla_hw_data *ha = sp->fcport->vha->hw;
1987
1988         mbx->entry_type = MBX_IOCB_TYPE;
1989         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
1990         mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
1991         if (HAS_EXTENDED_IDS(ha)) {
1992                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
1993                 mbx->mb10 = cpu_to_le16(BIT_0);
1994         } else {
1995                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
1996         }
1997         mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
1998         mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
1999         mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2000         mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2001         mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
2002 }
2003
2004 static void
2005 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2006 {
2007         uint32_t flags;
2008         uint64_t lun;
2009         struct fc_port *fcport = sp->fcport;
2010         scsi_qla_host_t *vha = fcport->vha;
2011         struct qla_hw_data *ha = vha->hw;
2012         struct srb_iocb *iocb = &sp->u.iocb_cmd;
2013         struct req_que *req = vha->req;
2014
2015         flags = iocb->u.tmf.flags;
2016         lun = iocb->u.tmf.lun;
2017
2018         tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2019         tsk->entry_count = 1;
2020         tsk->handle = MAKE_HANDLE(req->id, tsk->handle);
2021         tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2022         tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2023         tsk->control_flags = cpu_to_le32(flags);
2024         tsk->port_id[0] = fcport->d_id.b.al_pa;
2025         tsk->port_id[1] = fcport->d_id.b.area;
2026         tsk->port_id[2] = fcport->d_id.b.domain;
2027         tsk->vp_index = fcport->vha->vp_idx;
2028
2029         if (flags == TCF_LUN_RESET) {
2030                 int_to_scsilun(lun, &tsk->lun);
2031                 host_to_fcp_swap((uint8_t *)&tsk->lun,
2032                         sizeof(tsk->lun));
2033         }
2034 }
2035
2036 static void
2037 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2038 {
2039         struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2040
2041         els_iocb->entry_type = ELS_IOCB_TYPE;
2042         els_iocb->entry_count = 1;
2043         els_iocb->sys_define = 0;
2044         els_iocb->entry_status = 0;
2045         els_iocb->handle = sp->handle;
2046         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2047         els_iocb->tx_dsd_count = __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
2048         els_iocb->vp_index = sp->fcport->vha->vp_idx;
2049         els_iocb->sof_type = EST_SOFI3;
2050         els_iocb->rx_dsd_count = __constant_cpu_to_le16(bsg_job->reply_payload.sg_cnt);
2051
2052         els_iocb->opcode =
2053             sp->type == SRB_ELS_CMD_RPT ?
2054             bsg_job->request->rqst_data.r_els.els_code :
2055             bsg_job->request->rqst_data.h_els.command_code;
2056         els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2057         els_iocb->port_id[1] = sp->fcport->d_id.b.area;
2058         els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2059         els_iocb->control_flags = 0;
2060         els_iocb->rx_byte_count =
2061             cpu_to_le32(bsg_job->reply_payload.payload_len);
2062         els_iocb->tx_byte_count =
2063             cpu_to_le32(bsg_job->request_payload.payload_len);
2064
2065         els_iocb->tx_address[0] = cpu_to_le32(LSD(sg_dma_address
2066             (bsg_job->request_payload.sg_list)));
2067         els_iocb->tx_address[1] = cpu_to_le32(MSD(sg_dma_address
2068             (bsg_job->request_payload.sg_list)));
2069         els_iocb->tx_len = cpu_to_le32(sg_dma_len
2070             (bsg_job->request_payload.sg_list));
2071
2072         els_iocb->rx_address[0] = cpu_to_le32(LSD(sg_dma_address
2073             (bsg_job->reply_payload.sg_list)));
2074         els_iocb->rx_address[1] = cpu_to_le32(MSD(sg_dma_address
2075             (bsg_job->reply_payload.sg_list)));
2076         els_iocb->rx_len = cpu_to_le32(sg_dma_len
2077             (bsg_job->reply_payload.sg_list));
2078
2079         sp->fcport->vha->qla_stats.control_requests++;
2080 }
2081
2082 static void
2083 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
2084 {
2085         uint16_t        avail_dsds;
2086         uint32_t        *cur_dsd;
2087         struct scatterlist *sg;
2088         int index;
2089         uint16_t tot_dsds;
2090         scsi_qla_host_t *vha = sp->fcport->vha;
2091         struct qla_hw_data *ha = vha->hw;
2092         struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2093         int loop_iterartion = 0;
2094         int cont_iocb_prsnt = 0;
2095         int entry_count = 1;
2096
2097         memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
2098         ct_iocb->entry_type = CT_IOCB_TYPE;
2099         ct_iocb->entry_status = 0;
2100         ct_iocb->handle1 = sp->handle;
2101         SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
2102         ct_iocb->status = __constant_cpu_to_le16(0);
2103         ct_iocb->control_flags = __constant_cpu_to_le16(0);
2104         ct_iocb->timeout = 0;
2105         ct_iocb->cmd_dsd_count =
2106             __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
2107         ct_iocb->total_dsd_count =
2108             __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
2109         ct_iocb->req_bytecount =
2110             cpu_to_le32(bsg_job->request_payload.payload_len);
2111         ct_iocb->rsp_bytecount =
2112             cpu_to_le32(bsg_job->reply_payload.payload_len);
2113
2114         ct_iocb->dseg_req_address[0] = cpu_to_le32(LSD(sg_dma_address
2115             (bsg_job->request_payload.sg_list)));
2116         ct_iocb->dseg_req_address[1] = cpu_to_le32(MSD(sg_dma_address
2117             (bsg_job->request_payload.sg_list)));
2118         ct_iocb->dseg_req_length = ct_iocb->req_bytecount;
2119
2120         ct_iocb->dseg_rsp_address[0] = cpu_to_le32(LSD(sg_dma_address
2121             (bsg_job->reply_payload.sg_list)));
2122         ct_iocb->dseg_rsp_address[1] = cpu_to_le32(MSD(sg_dma_address
2123             (bsg_job->reply_payload.sg_list)));
2124         ct_iocb->dseg_rsp_length = ct_iocb->rsp_bytecount;
2125
2126         avail_dsds = 1;
2127         cur_dsd = (uint32_t *)ct_iocb->dseg_rsp_address;
2128         index = 0;
2129         tot_dsds = bsg_job->reply_payload.sg_cnt;
2130
2131         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
2132                 dma_addr_t       sle_dma;
2133                 cont_a64_entry_t *cont_pkt;
2134
2135                 /* Allocate additional continuation packets? */
2136                 if (avail_dsds == 0) {
2137                         /*
2138                         * Five DSDs are available in the Cont.
2139                         * Type 1 IOCB.
2140                                */
2141                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
2142                             vha->hw->req_q_map[0]);
2143                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
2144                         avail_dsds = 5;
2145                         cont_iocb_prsnt = 1;
2146                         entry_count++;
2147                 }
2148
2149                 sle_dma = sg_dma_address(sg);
2150                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
2151                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
2152                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
2153                 loop_iterartion++;
2154                 avail_dsds--;
2155         }
2156         ct_iocb->entry_count = entry_count;
2157
2158         sp->fcport->vha->qla_stats.control_requests++;
2159 }
2160
2161 static void
2162 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
2163 {
2164         uint16_t        avail_dsds;
2165         uint32_t        *cur_dsd;
2166         struct scatterlist *sg;
2167         int index;
2168         uint16_t tot_dsds;
2169         scsi_qla_host_t *vha = sp->fcport->vha;
2170         struct qla_hw_data *ha = vha->hw;
2171         struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2172         int loop_iterartion = 0;
2173         int cont_iocb_prsnt = 0;
2174         int entry_count = 1;
2175
2176         ct_iocb->entry_type = CT_IOCB_TYPE;
2177         ct_iocb->entry_status = 0;
2178         ct_iocb->sys_define = 0;
2179         ct_iocb->handle = sp->handle;
2180
2181         ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2182         ct_iocb->vp_index = sp->fcport->vha->vp_idx;
2183         ct_iocb->comp_status = __constant_cpu_to_le16(0);
2184
2185         ct_iocb->cmd_dsd_count =
2186             __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
2187         ct_iocb->timeout = 0;
2188         ct_iocb->rsp_dsd_count =
2189             __constant_cpu_to_le16(bsg_job->reply_payload.sg_cnt);
2190         ct_iocb->rsp_byte_count =
2191             cpu_to_le32(bsg_job->reply_payload.payload_len);
2192         ct_iocb->cmd_byte_count =
2193             cpu_to_le32(bsg_job->request_payload.payload_len);
2194         ct_iocb->dseg_0_address[0] = cpu_to_le32(LSD(sg_dma_address
2195             (bsg_job->request_payload.sg_list)));
2196         ct_iocb->dseg_0_address[1] = cpu_to_le32(MSD(sg_dma_address
2197            (bsg_job->request_payload.sg_list)));
2198         ct_iocb->dseg_0_len = cpu_to_le32(sg_dma_len
2199             (bsg_job->request_payload.sg_list));
2200
2201         avail_dsds = 1;
2202         cur_dsd = (uint32_t *)ct_iocb->dseg_1_address;
2203         index = 0;
2204         tot_dsds = bsg_job->reply_payload.sg_cnt;
2205
2206         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
2207                 dma_addr_t       sle_dma;
2208                 cont_a64_entry_t *cont_pkt;
2209
2210                 /* Allocate additional continuation packets? */
2211                 if (avail_dsds == 0) {
2212                         /*
2213                         * Five DSDs are available in the Cont.
2214                         * Type 1 IOCB.
2215                                */
2216                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
2217                             ha->req_q_map[0]);
2218                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
2219                         avail_dsds = 5;
2220                         cont_iocb_prsnt = 1;
2221                         entry_count++;
2222                 }
2223
2224                 sle_dma = sg_dma_address(sg);
2225                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
2226                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
2227                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
2228                 loop_iterartion++;
2229                 avail_dsds--;
2230         }
2231         ct_iocb->entry_count = entry_count;
2232 }
2233
2234 /*
2235  * qla82xx_start_scsi() - Send a SCSI command to the ISP
2236  * @sp: command to send to the ISP
2237  *
2238  * Returns non-zero if a failure occurred, else zero.
2239  */
2240 int
2241 qla82xx_start_scsi(srb_t *sp)
2242 {
2243         int             ret, nseg;
2244         unsigned long   flags;
2245         struct scsi_cmnd *cmd;
2246         uint32_t        *clr_ptr;
2247         uint32_t        index;
2248         uint32_t        handle;
2249         uint16_t        cnt;
2250         uint16_t        req_cnt;
2251         uint16_t        tot_dsds;
2252         struct device_reg_82xx __iomem *reg;
2253         uint32_t dbval;
2254         uint32_t *fcp_dl;
2255         uint8_t additional_cdb_len;
2256         struct ct6_dsd *ctx;
2257         struct scsi_qla_host *vha = sp->fcport->vha;
2258         struct qla_hw_data *ha = vha->hw;
2259         struct req_que *req = NULL;
2260         struct rsp_que *rsp = NULL;
2261
2262         /* Setup device pointers. */
2263         ret = 0;
2264         reg = &ha->iobase->isp82;
2265         cmd = GET_CMD_SP(sp);
2266         req = vha->req;
2267         rsp = ha->rsp_q_map[0];
2268
2269         /* So we know we haven't pci_map'ed anything yet */
2270         tot_dsds = 0;
2271
2272         dbval = 0x04 | (ha->portnum << 5);
2273
2274         /* Send marker if required */
2275         if (vha->marker_needed != 0) {
2276                 if (qla2x00_marker(vha, req,
2277                         rsp, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
2278                         ql_log(ql_log_warn, vha, 0x300c,
2279                             "qla2x00_marker failed for cmd=%p.\n", cmd);
2280                         return QLA_FUNCTION_FAILED;
2281                 }
2282                 vha->marker_needed = 0;
2283         }
2284
2285         /* Acquire ring specific lock */
2286         spin_lock_irqsave(&ha->hardware_lock, flags);
2287
2288         /* Check for room in outstanding command list. */
2289         handle = req->current_outstanding_cmd;
2290         for (index = 1; index < req->num_outstanding_cmds; index++) {
2291                 handle++;
2292                 if (handle == req->num_outstanding_cmds)
2293                         handle = 1;
2294                 if (!req->outstanding_cmds[handle])
2295                         break;
2296         }
2297         if (index == req->num_outstanding_cmds)
2298                 goto queuing_error;
2299
2300         /* Map the sg table so we have an accurate count of sg entries needed */
2301         if (scsi_sg_count(cmd)) {
2302                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2303                     scsi_sg_count(cmd), cmd->sc_data_direction);
2304                 if (unlikely(!nseg))
2305                         goto queuing_error;
2306         } else
2307                 nseg = 0;
2308
2309         tot_dsds = nseg;
2310
2311         if (tot_dsds > ql2xshiftctondsd) {
2312                 struct cmd_type_6 *cmd_pkt;
2313                 uint16_t more_dsd_lists = 0;
2314                 struct dsd_dma *dsd_ptr;
2315                 uint16_t i;
2316
2317                 more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
2318                 if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
2319                         ql_dbg(ql_dbg_io, vha, 0x300d,
2320                             "Num of DSD list %d is than %d for cmd=%p.\n",
2321                             more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
2322                             cmd);
2323                         goto queuing_error;
2324                 }
2325
2326                 if (more_dsd_lists <= ha->gbl_dsd_avail)
2327                         goto sufficient_dsds;
2328                 else
2329                         more_dsd_lists -= ha->gbl_dsd_avail;
2330
2331                 for (i = 0; i < more_dsd_lists; i++) {
2332                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
2333                         if (!dsd_ptr) {
2334                                 ql_log(ql_log_fatal, vha, 0x300e,
2335                                     "Failed to allocate memory for dsd_dma "
2336                                     "for cmd=%p.\n", cmd);
2337                                 goto queuing_error;
2338                         }
2339
2340                         dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
2341                                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
2342                         if (!dsd_ptr->dsd_addr) {
2343                                 kfree(dsd_ptr);
2344                                 ql_log(ql_log_fatal, vha, 0x300f,
2345                                     "Failed to allocate memory for dsd_addr "
2346                                     "for cmd=%p.\n", cmd);
2347                                 goto queuing_error;
2348                         }
2349                         list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
2350                         ha->gbl_dsd_avail++;
2351                 }
2352
2353 sufficient_dsds:
2354                 req_cnt = 1;
2355
2356                 if (req->cnt < (req_cnt + 2)) {
2357                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
2358                                 &reg->req_q_out[0]);
2359                         if (req->ring_index < cnt)
2360                                 req->cnt = cnt - req->ring_index;
2361                         else
2362                                 req->cnt = req->length -
2363                                         (req->ring_index - cnt);
2364                         if (req->cnt < (req_cnt + 2))
2365                                 goto queuing_error;
2366                 }
2367
2368                 ctx = sp->u.scmd.ctx =
2369                     mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
2370                 if (!ctx) {
2371                         ql_log(ql_log_fatal, vha, 0x3010,
2372                             "Failed to allocate ctx for cmd=%p.\n", cmd);
2373                         goto queuing_error;
2374                 }
2375
2376                 memset(ctx, 0, sizeof(struct ct6_dsd));
2377                 ctx->fcp_cmnd = dma_pool_alloc(ha->fcp_cmnd_dma_pool,
2378                         GFP_ATOMIC, &ctx->fcp_cmnd_dma);
2379                 if (!ctx->fcp_cmnd) {
2380                         ql_log(ql_log_fatal, vha, 0x3011,
2381                             "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
2382                         goto queuing_error;
2383                 }
2384
2385                 /* Initialize the DSD list and dma handle */
2386                 INIT_LIST_HEAD(&ctx->dsd_list);
2387                 ctx->dsd_use_cnt = 0;
2388
2389                 if (cmd->cmd_len > 16) {
2390                         additional_cdb_len = cmd->cmd_len - 16;
2391                         if ((cmd->cmd_len % 4) != 0) {
2392                                 /* SCSI command bigger than 16 bytes must be
2393                                  * multiple of 4
2394                                  */
2395                                 ql_log(ql_log_warn, vha, 0x3012,
2396                                     "scsi cmd len %d not multiple of 4 "
2397                                     "for cmd=%p.\n", cmd->cmd_len, cmd);
2398                                 goto queuing_error_fcp_cmnd;
2399                         }
2400                         ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
2401                 } else {
2402                         additional_cdb_len = 0;
2403                         ctx->fcp_cmnd_len = 12 + 16 + 4;
2404                 }
2405
2406                 cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
2407                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2408
2409                 /* Zero out remaining portion of packet. */
2410                 /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
2411                 clr_ptr = (uint32_t *)cmd_pkt + 2;
2412                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2413                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2414
2415                 /* Set NPORT-ID and LUN number*/
2416                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2417                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2418                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2419                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2420                 cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2421
2422                 /* Build IOCB segments */
2423                 if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
2424                         goto queuing_error_fcp_cmnd;
2425
2426                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2427                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2428
2429                 /* build FCP_CMND IU */
2430                 memset(ctx->fcp_cmnd, 0, sizeof(struct fcp_cmnd));
2431                 int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
2432                 ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
2433
2434                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2435                         ctx->fcp_cmnd->additional_cdb_len |= 1;
2436                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
2437                         ctx->fcp_cmnd->additional_cdb_len |= 2;
2438
2439                 /* Populate the FCP_PRIO. */
2440                 if (ha->flags.fcp_prio_enabled)
2441                         ctx->fcp_cmnd->task_attribute |=
2442                             sp->fcport->fcp_prio << 3;
2443
2444                 memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
2445
2446                 fcp_dl = (uint32_t *)(ctx->fcp_cmnd->cdb + 16 +
2447                     additional_cdb_len);
2448                 *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
2449
2450                 cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
2451                 cmd_pkt->fcp_cmnd_dseg_address[0] =
2452                     cpu_to_le32(LSD(ctx->fcp_cmnd_dma));
2453                 cmd_pkt->fcp_cmnd_dseg_address[1] =
2454                     cpu_to_le32(MSD(ctx->fcp_cmnd_dma));
2455
2456                 sp->flags |= SRB_FCP_CMND_DMA_VALID;
2457                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2458                 /* Set total data segment count. */
2459                 cmd_pkt->entry_count = (uint8_t)req_cnt;
2460                 /* Specify response queue number where
2461                  * completion should happen
2462                  */
2463                 cmd_pkt->entry_status = (uint8_t) rsp->id;
2464         } else {
2465                 struct cmd_type_7 *cmd_pkt;
2466                 req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2467                 if (req->cnt < (req_cnt + 2)) {
2468                         cnt = (uint16_t)RD_REG_DWORD_RELAXED(
2469                             &reg->req_q_out[0]);
2470                         if (req->ring_index < cnt)
2471                                 req->cnt = cnt - req->ring_index;
2472                         else
2473                                 req->cnt = req->length -
2474                                         (req->ring_index - cnt);
2475                 }
2476                 if (req->cnt < (req_cnt + 2))
2477                         goto queuing_error;
2478
2479                 cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
2480                 cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2481
2482                 /* Zero out remaining portion of packet. */
2483                 /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
2484                 clr_ptr = (uint32_t *)cmd_pkt + 2;
2485                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2486                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2487
2488                 /* Set NPORT-ID and LUN number*/
2489                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2490                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2491                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2492                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2493                 cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2494
2495                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2496                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
2497                     sizeof(cmd_pkt->lun));
2498
2499                 /* Populate the FCP_PRIO. */
2500                 if (ha->flags.fcp_prio_enabled)
2501                         cmd_pkt->task |= sp->fcport->fcp_prio << 3;
2502
2503                 /* Load SCSI command packet. */
2504                 memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2505                 host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2506
2507                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2508
2509                 /* Build IOCB segments */
2510                 qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
2511
2512                 /* Set total data segment count. */
2513                 cmd_pkt->entry_count = (uint8_t)req_cnt;
2514                 /* Specify response queue number where
2515                  * completion should happen.
2516                  */
2517                 cmd_pkt->entry_status = (uint8_t) rsp->id;
2518
2519         }
2520         /* Build command packet. */
2521         req->current_outstanding_cmd = handle;
2522         req->outstanding_cmds[handle] = sp;
2523         sp->handle = handle;
2524         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2525         req->cnt -= req_cnt;
2526         wmb();
2527
2528         /* Adjust ring index. */
2529         req->ring_index++;
2530         if (req->ring_index == req->length) {
2531                 req->ring_index = 0;
2532                 req->ring_ptr = req->ring;
2533         } else
2534                 req->ring_ptr++;
2535
2536         sp->flags |= SRB_DMA_VALID;
2537
2538         /* Set chip new ring index. */
2539         /* write, read and verify logic */
2540         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
2541         if (ql2xdbwr)
2542                 qla82xx_wr_32(ha, ha->nxdb_wr_ptr, dbval);
2543         else {
2544                 WRT_REG_DWORD(
2545                         (unsigned long __iomem *)ha->nxdb_wr_ptr,
2546                         dbval);
2547                 wmb();
2548                 while (RD_REG_DWORD((void __iomem *)ha->nxdb_rd_ptr) != dbval) {
2549                         WRT_REG_DWORD(
2550                                 (unsigned long __iomem *)ha->nxdb_wr_ptr,
2551                                 dbval);
2552                         wmb();
2553                 }
2554         }
2555
2556         /* Manage unprocessed RIO/ZIO commands in response queue. */
2557         if (vha->flags.process_response_queue &&
2558             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2559                 qla24xx_process_response_queue(vha, rsp);
2560
2561         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2562         return QLA_SUCCESS;
2563
2564 queuing_error_fcp_cmnd:
2565         dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
2566 queuing_error:
2567         if (tot_dsds)
2568                 scsi_dma_unmap(cmd);
2569
2570         if (sp->u.scmd.ctx) {
2571                 mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
2572                 sp->u.scmd.ctx = NULL;
2573         }
2574         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2575
2576         return QLA_FUNCTION_FAILED;
2577 }
2578
2579 static void
2580 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
2581 {
2582         struct srb_iocb *aio = &sp->u.iocb_cmd;
2583         scsi_qla_host_t *vha = sp->fcport->vha;
2584         struct req_que *req = vha->req;
2585
2586         memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
2587         abt_iocb->entry_type = ABORT_IOCB_TYPE;
2588         abt_iocb->entry_count = 1;
2589         abt_iocb->handle = cpu_to_le32(MAKE_HANDLE(req->id, sp->handle));
2590         abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2591         abt_iocb->handle_to_abort =
2592             cpu_to_le32(MAKE_HANDLE(req->id, aio->u.abt.cmd_hndl));
2593         abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
2594         abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
2595         abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
2596         abt_iocb->vp_index = vha->vp_idx;
2597         abt_iocb->req_que_no = cpu_to_le16(req->id);
2598         /* Send the command to the firmware */
2599         wmb();
2600 }
2601
2602 int
2603 qla2x00_start_sp(srb_t *sp)
2604 {
2605         int rval;
2606         struct qla_hw_data *ha = sp->fcport->vha->hw;
2607         void *pkt;
2608         unsigned long flags;
2609
2610         rval = QLA_FUNCTION_FAILED;
2611         spin_lock_irqsave(&ha->hardware_lock, flags);
2612         pkt = qla2x00_alloc_iocbs(sp->fcport->vha, sp);
2613         if (!pkt) {
2614                 ql_log(ql_log_warn, sp->fcport->vha, 0x700c,
2615                     "qla2x00_alloc_iocbs failed.\n");
2616                 goto done;
2617         }
2618
2619         rval = QLA_SUCCESS;
2620         switch (sp->type) {
2621         case SRB_LOGIN_CMD:
2622                 IS_FWI2_CAPABLE(ha) ?
2623                     qla24xx_login_iocb(sp, pkt) :
2624                     qla2x00_login_iocb(sp, pkt);
2625                 break;
2626         case SRB_LOGOUT_CMD:
2627                 IS_FWI2_CAPABLE(ha) ?
2628                     qla24xx_logout_iocb(sp, pkt) :
2629                     qla2x00_logout_iocb(sp, pkt);
2630                 break;
2631         case SRB_ELS_CMD_RPT:
2632         case SRB_ELS_CMD_HST:
2633                 qla24xx_els_iocb(sp, pkt);
2634                 break;
2635         case SRB_CT_CMD:
2636                 IS_FWI2_CAPABLE(ha) ?
2637                     qla24xx_ct_iocb(sp, pkt) :
2638                     qla2x00_ct_iocb(sp, pkt);
2639                 break;
2640         case SRB_ADISC_CMD:
2641                 IS_FWI2_CAPABLE(ha) ?
2642                     qla24xx_adisc_iocb(sp, pkt) :
2643                     qla2x00_adisc_iocb(sp, pkt);
2644                 break;
2645         case SRB_TM_CMD:
2646                 IS_QLAFX00(ha) ?
2647                     qlafx00_tm_iocb(sp, pkt) :
2648                     qla24xx_tm_iocb(sp, pkt);
2649                 break;
2650         case SRB_FXIOCB_DCMD:
2651         case SRB_FXIOCB_BCMD:
2652                 qlafx00_fxdisc_iocb(sp, pkt);
2653                 break;
2654         case SRB_ABT_CMD:
2655                 IS_QLAFX00(ha) ?
2656                         qlafx00_abort_iocb(sp, pkt) :
2657                         qla24xx_abort_iocb(sp, pkt);
2658                 break;
2659         default:
2660                 break;
2661         }
2662
2663         wmb();
2664         qla2x00_start_iocbs(sp->fcport->vha, ha->req_q_map[0]);
2665 done:
2666         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2667         return rval;
2668 }
2669
2670 static void
2671 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
2672                                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
2673 {
2674         uint16_t avail_dsds;
2675         uint32_t *cur_dsd;
2676         uint32_t req_data_len = 0;
2677         uint32_t rsp_data_len = 0;
2678         struct scatterlist *sg;
2679         int index;
2680         int entry_count = 1;
2681         struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2682
2683         /*Update entry type to indicate bidir command */
2684         *((uint32_t *)(&cmd_pkt->entry_type)) =
2685                 __constant_cpu_to_le32(COMMAND_BIDIRECTIONAL);
2686
2687         /* Set the transfer direction, in this set both flags
2688          * Also set the BD_WRAP_BACK flag, firmware will take care
2689          * assigning DID=SID for outgoing pkts.
2690          */
2691         cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
2692         cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
2693         cmd_pkt->control_flags =
2694                         __constant_cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
2695                                                         BD_WRAP_BACK);
2696
2697         req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
2698         cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
2699         cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
2700         cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
2701
2702         vha->bidi_stats.transfer_bytes += req_data_len;
2703         vha->bidi_stats.io_count++;
2704
2705         vha->qla_stats.output_bytes += req_data_len;
2706         vha->qla_stats.output_requests++;
2707
2708         /* Only one dsd is available for bidirectional IOCB, remaining dsds
2709          * are bundled in continuation iocb
2710          */
2711         avail_dsds = 1;
2712         cur_dsd = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
2713
2714         index = 0;
2715
2716         for_each_sg(bsg_job->request_payload.sg_list, sg,
2717                                 bsg_job->request_payload.sg_cnt, index) {
2718                 dma_addr_t sle_dma;
2719                 cont_a64_entry_t *cont_pkt;
2720
2721                 /* Allocate additional continuation packets */
2722                 if (avail_dsds == 0) {
2723                         /* Continuation type 1 IOCB can accomodate
2724                          * 5 DSDS
2725                          */
2726                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
2727                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
2728                         avail_dsds = 5;
2729                         entry_count++;
2730                 }
2731                 sle_dma = sg_dma_address(sg);
2732                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
2733                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
2734                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
2735                 avail_dsds--;
2736         }
2737         /* For read request DSD will always goes to continuation IOCB
2738          * and follow the write DSD. If there is room on the current IOCB
2739          * then it is added to that IOCB else new continuation IOCB is
2740          * allocated.
2741          */
2742         for_each_sg(bsg_job->reply_payload.sg_list, sg,
2743                                 bsg_job->reply_payload.sg_cnt, index) {
2744                 dma_addr_t sle_dma;
2745                 cont_a64_entry_t *cont_pkt;
2746
2747                 /* Allocate additional continuation packets */
2748                 if (avail_dsds == 0) {
2749                         /* Continuation type 1 IOCB can accomodate
2750                          * 5 DSDS
2751                          */
2752                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
2753                         cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
2754                         avail_dsds = 5;
2755                         entry_count++;
2756                 }
2757                 sle_dma = sg_dma_address(sg);
2758                 *cur_dsd++   = cpu_to_le32(LSD(sle_dma));
2759                 *cur_dsd++   = cpu_to_le32(MSD(sle_dma));
2760                 *cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
2761                 avail_dsds--;
2762         }
2763         /* This value should be same as number of IOCB required for this cmd */
2764         cmd_pkt->entry_count = entry_count;
2765 }
2766
2767 int
2768 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
2769 {
2770
2771         struct qla_hw_data *ha = vha->hw;
2772         unsigned long flags;
2773         uint32_t handle;
2774         uint32_t index;
2775         uint16_t req_cnt;
2776         uint16_t cnt;
2777         uint32_t *clr_ptr;
2778         struct cmd_bidir *cmd_pkt = NULL;
2779         struct rsp_que *rsp;
2780         struct req_que *req;
2781         int rval = EXT_STATUS_OK;
2782
2783         rval = QLA_SUCCESS;
2784
2785         rsp = ha->rsp_q_map[0];
2786         req = vha->req;
2787
2788         /* Send marker if required */
2789         if (vha->marker_needed != 0) {
2790                 if (qla2x00_marker(vha, req,
2791                         rsp, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
2792                         return EXT_STATUS_MAILBOX;
2793                 vha->marker_needed = 0;
2794         }
2795
2796         /* Acquire ring specific lock */
2797         spin_lock_irqsave(&ha->hardware_lock, flags);
2798
2799         /* Check for room in outstanding command list. */
2800         handle = req->current_outstanding_cmd;
2801         for (index = 1; index < req->num_outstanding_cmds; index++) {
2802                 handle++;
2803                 if (handle == req->num_outstanding_cmds)
2804                         handle = 1;
2805                 if (!req->outstanding_cmds[handle])
2806                         break;
2807         }
2808
2809         if (index == req->num_outstanding_cmds) {
2810                 rval = EXT_STATUS_BUSY;
2811                 goto queuing_error;
2812         }
2813
2814         /* Calculate number of IOCB required */
2815         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2816
2817         /* Check for room on request queue. */
2818         if (req->cnt < req_cnt + 2) {
2819                 cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
2820                     RD_REG_DWORD_RELAXED(req->req_q_out);
2821                 if  (req->ring_index < cnt)
2822                         req->cnt = cnt - req->ring_index;
2823                 else
2824                         req->cnt = req->length -
2825                                 (req->ring_index - cnt);
2826         }
2827         if (req->cnt < req_cnt + 2) {
2828                 rval = EXT_STATUS_BUSY;
2829                 goto queuing_error;
2830         }
2831
2832         cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
2833         cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
2834
2835         /* Zero out remaining portion of packet. */
2836         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
2837         clr_ptr = (uint32_t *)cmd_pkt + 2;
2838         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2839
2840         /* Set NPORT-ID  (of vha)*/
2841         cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
2842         cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
2843         cmd_pkt->port_id[1] = vha->d_id.b.area;
2844         cmd_pkt->port_id[2] = vha->d_id.b.domain;
2845
2846         qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
2847         cmd_pkt->entry_status = (uint8_t) rsp->id;
2848         /* Build command packet. */
2849         req->current_outstanding_cmd = handle;
2850         req->outstanding_cmds[handle] = sp;
2851         sp->handle = handle;
2852         req->cnt -= req_cnt;
2853
2854         /* Send the command to the firmware */
2855         wmb();
2856         qla2x00_start_iocbs(vha, req);
2857 queuing_error:
2858         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2859         return rval;
2860 }