drivers/scsi/qla2xxx/qla_iocb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic Fibre Channel HBA Driver
   4  * Copyright (c)  2003-2014 QLogic Corporation
   5  */
   6 #include "qla_def.h"
   7 #include "qla_target.h"
   8
   9 #include <linux/blkdev.h>
  10 #include <linux/delay.h>
  11
  12 #include <scsi/scsi_tcq.h>
  13
  14 /**
  15  * qla2x00_get_cmd_direction() - Determine control_flag data direction.
  16  * @sp: SCSI command
  17  *
  18  * Returns the proper CF_* direction based on CDB.
  19  */
  20 static inline uint16_t
  21 qla2x00_get_cmd_direction(srb_t *sp)
  22 {
  23         uint16_t cflags;
  24         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
  25         struct scsi_qla_host *vha = sp->vha;
  26
  27         cflags = 0;
  28
  29         /* Set transfer direction */
  30         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
  31                 cflags = CF_WRITE;
  32                 vha->qla_stats.output_bytes += scsi_bufflen(cmd);
  33                 vha->qla_stats.output_requests++;
  34         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
  35                 cflags = CF_READ;
  36                 vha->qla_stats.input_bytes += scsi_bufflen(cmd);
  37                 vha->qla_stats.input_requests++;
  38         }
  39         return (cflags);
  40 }
  41
  42 /**
  43  * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
  44  * Continuation Type 0 IOCBs to allocate.
  45  *
  46  * @dsds: number of data segment descriptors needed
  47  *
  48  * Returns the number of IOCB entries needed to store @dsds.
  49  */
  50 uint16_t
  51 qla2x00_calc_iocbs_32(uint16_t dsds)
  52 {
  53         uint16_t iocbs;
  54
  55         iocbs = 1;
  56         if (dsds > 3) {
  57                 iocbs += (dsds - 3) / 7;
  58                 if ((dsds - 3) % 7)
  59                         iocbs++;
  60         }
  61         return (iocbs);
  62 }
  63
  64 /**
  65  * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
  66  * Continuation Type 1 IOCBs to allocate.
  67  *
  68  * @dsds: number of data segment descriptors needed
  69  *
  70  * Returns the number of IOCB entries needed to store @dsds.
  71  */
  72 uint16_t
  73 qla2x00_calc_iocbs_64(uint16_t dsds)
  74 {
  75         uint16_t iocbs;
  76
  77         iocbs = 1;
  78         if (dsds > 2) {
  79                 iocbs += (dsds - 2) / 5;
  80                 if ((dsds - 2) % 5)
  81                         iocbs++;
  82         }
  83         return (iocbs);
  84 }
  85
  86 /**
  87  * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
  88  * @vha: HA context
  89  *
  90  * Returns a pointer to the Continuation Type 0 IOCB packet.
  91  */
  92 static inline cont_entry_t *
  93 qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
  94 {
  95         cont_entry_t *cont_pkt;
  96         struct req_que *req = vha->req;
  97         /* Adjust ring index. */
  98         req->ring_index++;
  99         if (req->ring_index == req->length) {
 100                 req->ring_index = 0;
 101                 req->ring_ptr = req->ring;
 102         } else {
 103                 req->ring_ptr++;
 104         }
 105
 106         cont_pkt = (cont_entry_t *)req->ring_ptr;
 107
 108         /* Load packet defaults. */
 109         put_unaligned_le32(CONTINUE_TYPE, &cont_pkt->entry_type);
 110
 111         return (cont_pkt);
 112 }
 113
 114 /**
 115  * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
 116  * @vha: HA context
 117  * @req: request queue
 118  *
 119  * Returns a pointer to the continuation type 1 IOCB packet.
 120  */
 121 static inline cont_a64_entry_t *
 122 qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
 123 {
 124         cont_a64_entry_t *cont_pkt;
 125
 126         /* Adjust ring index. */
 127         req->ring_index++;
 128         if (req->ring_index == req->length) {
 129                 req->ring_index = 0;
 130                 req->ring_ptr = req->ring;
 131         } else {
 132                 req->ring_ptr++;
 133         }
 134
 135         cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
 136
 137         /* Load packet defaults. */
 138         put_unaligned_le32(IS_QLAFX00(vha->hw) ? CONTINUE_A64_TYPE_FX00 :
 139                            CONTINUE_A64_TYPE, &cont_pkt->entry_type);
 140
 141         return (cont_pkt);
 142 }
 143
 144 inline int
 145 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 146 {
 147         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 148
 149         /* We always use DIFF Bundling for best performance */
 150         *fw_prot_opts = 0;
 151
 152         /* Translate SCSI opcode to a protection opcode */
 153         switch (scsi_get_prot_op(cmd)) {
 154         case SCSI_PROT_READ_STRIP:
 155                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 156                 break;
 157         case SCSI_PROT_WRITE_INSERT:
 158                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 159                 break;
 160         case SCSI_PROT_READ_INSERT:
 161                 *fw_prot_opts |= PO_MODE_DIF_INSERT;
 162                 break;
 163         case SCSI_PROT_WRITE_STRIP:
 164                 *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 165                 break;
 166         case SCSI_PROT_READ_PASS:
 167         case SCSI_PROT_WRITE_PASS:
 168                 if (cmd->prot_flags & SCSI_PROT_IP_CHECKSUM)
 169                         *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
 170                 else
 171                         *fw_prot_opts |= PO_MODE_DIF_PASS;
 172                 break;
 173         default:        /* Normal Request */
 174                 *fw_prot_opts |= PO_MODE_DIF_PASS;
 175                 break;
 176         }
 177
 178         if (!(cmd->prot_flags & SCSI_PROT_GUARD_CHECK))
 179                 *fw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 180
 181         return scsi_prot_sg_count(cmd);
 182 }
 183
 184 /*
 185  * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 186  * capable IOCB types.
 187  *
 188  * @sp: SRB command to process
 189  * @cmd_pkt: Command type 2 IOCB
 190  * @tot_dsds: Total number of segments to transfer
 191  */
 192 void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
 193     uint16_t tot_dsds)
 194 {
 195         uint16_t        avail_dsds;
 196         struct dsd32    *cur_dsd;
 197         scsi_qla_host_t *vha;
 198         struct scsi_cmnd *cmd;
 199         struct scatterlist *sg;
 200         int i;
 201
 202         cmd = GET_CMD_SP(sp);
 203
 204         /* Update entry type to indicate Command Type 2 IOCB */
 205         put_unaligned_le32(COMMAND_TYPE, &cmd_pkt->entry_type);
 206
 207         /* No data transfer */
 208         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 209                 cmd_pkt->byte_count = cpu_to_le32(0);
 210                 return;
 211         }
 212
 213         vha = sp->vha;
 214         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 215
 216         /* Three DSDs are available in the Command Type 2 IOCB */
 217         avail_dsds = ARRAY_SIZE(cmd_pkt->dsd32);
 218         cur_dsd = cmd_pkt->dsd32;
 219
 220         /* Load data segments */
 221         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 222                 cont_entry_t *cont_pkt;
 223
 224                 /* Allocate additional continuation packets? */
 225                 if (avail_dsds == 0) {
 226                         /*
 227                          * Seven DSDs are available in the Continuation
 228                          * Type 0 IOCB.
 229                          */
 230                         cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
 231                         cur_dsd = cont_pkt->dsd;
 232                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 233                 }
 234
 235                 append_dsd32(&cur_dsd, sg);
 236                 avail_dsds--;
 237         }
 238 }
 239
 240 /**
 241  * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 242  * capable IOCB types.
 243  *
 244  * @sp: SRB command to process
 245  * @cmd_pkt: Command type 3 IOCB
 246  * @tot_dsds: Total number of segments to transfer
 247  */
 248 void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
 249     uint16_t tot_dsds)
 250 {
 251         uint16_t        avail_dsds;
 252         struct dsd64    *cur_dsd;
 253         scsi_qla_host_t *vha;
 254         struct scsi_cmnd *cmd;
 255         struct scatterlist *sg;
 256         int i;
 257
 258         cmd = GET_CMD_SP(sp);
 259
 260         /* Update entry type to indicate Command Type 3 IOCB */
 261         put_unaligned_le32(COMMAND_A64_TYPE, &cmd_pkt->entry_type);
 262
 263         /* No data transfer */
 264         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 265                 cmd_pkt->byte_count = cpu_to_le32(0);
 266                 return;
 267         }
 268
 269         vha = sp->vha;
 270         cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 271
 272         /* Two DSDs are available in the Command Type 3 IOCB */
 273         avail_dsds = ARRAY_SIZE(cmd_pkt->dsd64);
 274         cur_dsd = cmd_pkt->dsd64;
 275
 276         /* Load data segments */
 277         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 278                 cont_a64_entry_t *cont_pkt;
 279
 280                 /* Allocate additional continuation packets? */
 281                 if (avail_dsds == 0) {
 282                         /*
 283                          * Five DSDs are available in the Continuation
 284                          * Type 1 IOCB.
 285                          */
 286                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 287                         cur_dsd = cont_pkt->dsd;
 288                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 289                 }
 290
 291                 append_dsd64(&cur_dsd, sg);
 292                 avail_dsds--;
 293         }
 294 }
 295
 296 /*
 297  * Find the first handle that is not in use, starting from
 298  * req->current_outstanding_cmd + 1. The caller must hold the lock that is
 299  * associated with @req.
 300  */
 301 uint32_t qla2xxx_get_next_handle(struct req_que *req)
 302 {
 303         uint32_t index, handle = req->current_outstanding_cmd;
 304
 305         for (index = 1; index < req->num_outstanding_cmds; index++) {
 306                 handle++;
 307                 if (handle == req->num_outstanding_cmds)
 308                         handle = 1;
 309                 if (!req->outstanding_cmds[handle])
 310                         return handle;
 311         }
 312
 313         return 0;
 314 }
 315
 316 /**
 317  * qla2x00_start_scsi() - Send a SCSI command to the ISP
 318  * @sp: command to send to the ISP
 319  *
 320  * Returns non-zero if a failure occurred, else zero.
 321  */
 322 int
 323 qla2x00_start_scsi(srb_t *sp)
 324 {
 325         int             nseg;
 326         unsigned long   flags;
 327         scsi_qla_host_t *vha;
 328         struct scsi_cmnd *cmd;
 329         uint32_t        *clr_ptr;
 330         uint32_t        handle;
 331         cmd_entry_t     *cmd_pkt;
 332         uint16_t        cnt;
 333         uint16_t        req_cnt;
 334         uint16_t        tot_dsds;
 335         struct device_reg_2xxx __iomem *reg;
 336         struct qla_hw_data *ha;
 337         struct req_que *req;
 338         struct rsp_que *rsp;
 339
 340         /* Setup device pointers. */
 341         vha = sp->vha;
 342         ha = vha->hw;
 343         reg = &ha->iobase->isp;
 344         cmd = GET_CMD_SP(sp);
 345         req = ha->req_q_map[0];
 346         rsp = ha->rsp_q_map[0];
 347         /* So we know we haven't pci_map'ed anything yet */
 348         tot_dsds = 0;
 349
 350         /* Send marker if required */
 351         if (vha->marker_needed != 0) {
 352                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
 353                     QLA_SUCCESS) {
 354                         return (QLA_FUNCTION_FAILED);
 355                 }
 356                 vha->marker_needed = 0;
 357         }
 358
 359         /* Acquire ring specific lock */
 360         spin_lock_irqsave(&ha->hardware_lock, flags);
 361
 362         handle = qla2xxx_get_next_handle(req);
 363         if (handle == 0)
 364                 goto queuing_error;
 365
 366         /* Map the sg table so we have an accurate count of sg entries needed */
 367         if (scsi_sg_count(cmd)) {
 368                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
 369                     scsi_sg_count(cmd), cmd->sc_data_direction);
 370                 if (unlikely(!nseg))
 371                         goto queuing_error;
 372         } else
 373                 nseg = 0;
 374
 375         tot_dsds = nseg;
 376
 377         /* Calculate the number of request entries needed. */
 378         req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
 379         if (req->cnt < (req_cnt + 2)) {
 380                 cnt = rd_reg_word_relaxed(ISP_REQ_Q_OUT(ha, reg));
 381                 if (req->ring_index < cnt)
 382                         req->cnt = cnt - req->ring_index;
 383                 else
 384                         req->cnt = req->length -
 385                             (req->ring_index - cnt);
 386                 /* If still no head room then bail out */
 387                 if (req->cnt < (req_cnt + 2))
 388                         goto queuing_error;
 389         }
 390
 391         /* Build command packet */
 392         req->current_outstanding_cmd = handle;
 393         req->outstanding_cmds[handle] = sp;
 394         sp->handle = handle;
 395         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
 396         req->cnt -= req_cnt;
 397
 398         cmd_pkt = (cmd_entry_t *)req->ring_ptr;
 399         cmd_pkt->handle = handle;
 400         /* Zero out remaining portion of packet. */
 401         clr_ptr = (uint32_t *)cmd_pkt + 2;
 402         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 403         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 404
 405         /* Set target ID and LUN number*/
 406         SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
 407         cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
 408         cmd_pkt->control_flags = cpu_to_le16(CF_SIMPLE_TAG);
 409
 410         /* Load SCSI command packet. */
 411         memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
 412         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 413
 414         /* Build IOCB segments */
 415         ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 416
 417         /* Set total data segment count. */
 418         cmd_pkt->entry_count = (uint8_t)req_cnt;
 419         wmb();
 420
 421         /* Adjust ring index. */
 422         req->ring_index++;
 423         if (req->ring_index == req->length) {
 424                 req->ring_index = 0;
 425                 req->ring_ptr = req->ring;
 426         } else
 427                 req->ring_ptr++;
 428
 429         sp->flags |= SRB_DMA_VALID;
 430
 431         /* Set chip new ring index. */
 432         wrt_reg_word(ISP_REQ_Q_IN(ha, reg), req->ring_index);
 433         rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
 434
 435         /* Manage unprocessed RIO/ZIO commands in response queue. */
 436         if (vha->flags.process_response_queue &&
 437             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 438                 qla2x00_process_response_queue(rsp);
 439
 440         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 441         return (QLA_SUCCESS);
 442
 443 queuing_error:
 444         if (tot_dsds)
 445                 scsi_dma_unmap(cmd);
 446
 447         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 448
 449         return (QLA_FUNCTION_FAILED);
 450 }
 451
 452 /**
 453  * qla2x00_start_iocbs() - Execute the IOCB command
 454  * @vha: HA context
 455  * @req: request queue
 456  */
 457 void
 458 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 459 {
 460         struct qla_hw_data *ha = vha->hw;
 461         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
 462
 463         if (IS_P3P_TYPE(ha)) {
 464                 qla82xx_start_iocbs(vha);
 465         } else {
 466                 /* Adjust ring index. */
 467                 req->ring_index++;
 468                 if (req->ring_index == req->length) {
 469                         req->ring_index = 0;
 470                         req->ring_ptr = req->ring;
 471                 } else
 472                         req->ring_ptr++;
 473
 474                 /* Set chip new ring index. */
 475                 if (ha->mqenable || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
 476                         wrt_reg_dword(req->req_q_in, req->ring_index);
 477                 } else if (IS_QLA83XX(ha)) {
 478                         wrt_reg_dword(req->req_q_in, req->ring_index);
 479                         rd_reg_dword_relaxed(&ha->iobase->isp24.hccr);
 480                 } else if (IS_QLAFX00(ha)) {
 481                         wrt_reg_dword(&reg->ispfx00.req_q_in, req->ring_index);
 482                         rd_reg_dword_relaxed(&reg->ispfx00.req_q_in);
 483                         QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
 484                 } else if (IS_FWI2_CAPABLE(ha)) {
 485                         wrt_reg_dword(&reg->isp24.req_q_in, req->ring_index);
 486                         rd_reg_dword_relaxed(&reg->isp24.req_q_in);
 487                 } else {
 488                         wrt_reg_word(ISP_REQ_Q_IN(ha, &reg->isp),
 489                                 req->ring_index);
 490                         rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, &reg->isp));
 491                 }
 492         }
 493 }
 494
 495 /**
 496  * __qla2x00_marker() - Send a marker IOCB to the firmware.
 497  * @vha: HA context
 498  * @qpair: queue pair pointer
 499  * @loop_id: loop ID
 500  * @lun: LUN
 501  * @type: marker modifier
 502  *
 503  * Can be called from both normal and interrupt context.
 504  *
 505  * Returns non-zero if a failure occurred, else zero.
 506  */
 507 static int
 508 __qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 509     uint16_t loop_id, uint64_t lun, uint8_t type)
 510 {
 511         mrk_entry_t *mrk;
 512         struct mrk_entry_24xx *mrk24 = NULL;
 513         struct req_que *req = qpair->req;
 514         struct qla_hw_data *ha = vha->hw;
 515         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 516
 517         mrk = (mrk_entry_t *)__qla2x00_alloc_iocbs(qpair, NULL);
 518         if (mrk == NULL) {
 519                 ql_log(ql_log_warn, base_vha, 0x3026,
 520                     "Failed to allocate Marker IOCB.\n");
 521
 522                 return (QLA_FUNCTION_FAILED);
 523         }
 524
 525         mrk->entry_type = MARKER_TYPE;
 526         mrk->modifier = type;
 527         if (type != MK_SYNC_ALL) {
 528                 if (IS_FWI2_CAPABLE(ha)) {
 529                         mrk24 = (struct mrk_entry_24xx *) mrk;
 530                         mrk24->nport_handle = cpu_to_le16(loop_id);
 531                         int_to_scsilun(lun, (struct scsi_lun *)&mrk24->lun);
 532                         host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
 533                         mrk24->vp_index = vha->vp_idx;
 534                         mrk24->handle = make_handle(req->id, mrk24->handle);
 535                 } else {
 536                         SET_TARGET_ID(ha, mrk->target, loop_id);
 537                         mrk->lun = cpu_to_le16((uint16_t)lun);
 538                 }
 539         }
 540         wmb();
 541
 542         qla2x00_start_iocbs(vha, req);
 543
 544         return (QLA_SUCCESS);
 545 }
 546
 547 int
 548 qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 549     uint16_t loop_id, uint64_t lun, uint8_t type)
 550 {
 551         int ret;
 552         unsigned long flags = 0;
 553
 554         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
 555         ret = __qla2x00_marker(vha, qpair, loop_id, lun, type);
 556         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
 557
 558         return (ret);
 559 }
 560
 561 /*
 562  * qla2x00_issue_marker
 563  *
 564  * Issue marker
 565  * Caller CAN have hardware lock held as specified by ha_locked parameter.
 566  * Might release it, then reaquire.
 567  */
 568 int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 569 {
 570         if (ha_locked) {
 571                 if (__qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 572                                         MK_SYNC_ALL) != QLA_SUCCESS)
 573                         return QLA_FUNCTION_FAILED;
 574         } else {
 575                 if (qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 576                                         MK_SYNC_ALL) != QLA_SUCCESS)
 577                         return QLA_FUNCTION_FAILED;
 578         }
 579         vha->marker_needed = 0;
 580
 581         return QLA_SUCCESS;
 582 }
 583
 584 static inline int
 585 qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
 586         uint16_t tot_dsds)
 587 {
 588         struct dsd64 *cur_dsd = NULL, *next_dsd;
 589         scsi_qla_host_t *vha;
 590         struct qla_hw_data *ha;
 591         struct scsi_cmnd *cmd;
 592         struct  scatterlist *cur_seg;
 593         uint8_t avail_dsds;
 594         uint8_t first_iocb = 1;
 595         uint32_t dsd_list_len;
 596         struct dsd_dma *dsd_ptr;
 597         struct ct6_dsd *ctx;
 598         struct qla_qpair *qpair = sp->qpair;
 599
 600         cmd = GET_CMD_SP(sp);
 601
 602         /* Update entry type to indicate Command Type 3 IOCB */
 603         put_unaligned_le32(COMMAND_TYPE_6, &cmd_pkt->entry_type);
 604
 605         /* No data transfer */
 606         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 607                 cmd_pkt->byte_count = cpu_to_le32(0);
 608                 return 0;
 609         }
 610
 611         vha = sp->vha;
 612         ha = vha->hw;
 613
 614         /* Set transfer direction */
 615         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 616                 cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
 617                 qpair->counters.output_bytes += scsi_bufflen(cmd);
 618                 qpair->counters.output_requests++;
 619         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 620                 cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
 621                 qpair->counters.input_bytes += scsi_bufflen(cmd);
 622                 qpair->counters.input_requests++;
 623         }
 624
 625         cur_seg = scsi_sglist(cmd);
 626         ctx = sp->u.scmd.ct6_ctx;
 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                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 646                                            &cmd_pkt->fcp_dsd.address);
 647                         cmd_pkt->fcp_dsd.length = cpu_to_le32(dsd_list_len);
 648                 } else {
 649                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 650                                            &cur_dsd->address);
 651                         cur_dsd->length = cpu_to_le32(dsd_list_len);
 652                         cur_dsd++;
 653                 }
 654                 cur_dsd = next_dsd;
 655                 while (avail_dsds) {
 656                         append_dsd64(&cur_dsd, cur_seg);
 657                         cur_seg = sg_next(cur_seg);
 658                         avail_dsds--;
 659                 }
 660         }
 661
 662         /* Null termination */
 663         cur_dsd->address = 0;
 664         cur_dsd->length = 0;
 665         cur_dsd++;
 666         cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
 667         return 0;
 668 }
 669
 670 /*
 671  * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 672  * for Command Type 6.
 673  *
 674  * @dsds: number of data segment descriptors needed
 675  *
 676  * Returns the number of dsd list needed to store @dsds.
 677  */
 678 static inline uint16_t
 679 qla24xx_calc_dsd_lists(uint16_t dsds)
 680 {
 681         uint16_t dsd_lists = 0;
 682
 683         dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
 684         if (dsds % QLA_DSDS_PER_IOCB)
 685                 dsd_lists++;
 686         return dsd_lists;
 687 }
 688
 689
 690 /**
 691  * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 692  * IOCB types.
 693  *
 694  * @sp: SRB command to process
 695  * @cmd_pkt: Command type 3 IOCB
 696  * @tot_dsds: Total number of segments to transfer
 697  * @req: pointer to request queue
 698  */
 699 inline void
 700 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 701         uint16_t tot_dsds, struct req_que *req)
 702 {
 703         uint16_t        avail_dsds;
 704         struct dsd64    *cur_dsd;
 705         scsi_qla_host_t *vha;
 706         struct scsi_cmnd *cmd;
 707         struct scatterlist *sg;
 708         int i;
 709         struct qla_qpair *qpair = sp->qpair;
 710
 711         cmd = GET_CMD_SP(sp);
 712
 713         /* Update entry type to indicate Command Type 3 IOCB */
 714         put_unaligned_le32(COMMAND_TYPE_7, &cmd_pkt->entry_type);
 715
 716         /* No data transfer */
 717         if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 718                 cmd_pkt->byte_count = cpu_to_le32(0);
 719                 return;
 720         }
 721
 722         vha = sp->vha;
 723
 724         /* Set transfer direction */
 725         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 726                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_WRITE_DATA);
 727                 qpair->counters.output_bytes += scsi_bufflen(cmd);
 728                 qpair->counters.output_requests++;
 729         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 730                 cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_READ_DATA);
 731                 qpair->counters.input_bytes += scsi_bufflen(cmd);
 732                 qpair->counters.input_requests++;
 733         }
 734
 735         /* One DSD is available in the Command Type 3 IOCB */
 736         avail_dsds = 1;
 737         cur_dsd = &cmd_pkt->dsd;
 738
 739         /* Load data segments */
 740
 741         scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 742                 cont_a64_entry_t *cont_pkt;
 743
 744                 /* Allocate additional continuation packets? */
 745                 if (avail_dsds == 0) {
 746                         /*
 747                          * Five DSDs are available in the Continuation
 748                          * Type 1 IOCB.
 749                          */
 750                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
 751                         cur_dsd = cont_pkt->dsd;
 752                         avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 753                 }
 754
 755                 append_dsd64(&cur_dsd, sg);
 756                 avail_dsds--;
 757         }
 758 }
 759
 760 struct fw_dif_context {
 761         __le32  ref_tag;
 762         __le16  app_tag;
 763         uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
 764         uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
 765 };
 766
 767 /*
 768  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 769  *
 770  */
 771 static inline void
 772 qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 773     unsigned int protcnt)
 774 {
 775         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 776
 777         pkt->ref_tag = cpu_to_le32(scsi_prot_ref_tag(cmd));
 778
 779         if (cmd->prot_flags & SCSI_PROT_REF_CHECK &&
 780             qla2x00_hba_err_chk_enabled(sp)) {
 781                 pkt->ref_tag_mask[0] = 0xff;
 782                 pkt->ref_tag_mask[1] = 0xff;
 783                 pkt->ref_tag_mask[2] = 0xff;
 784                 pkt->ref_tag_mask[3] = 0xff;
 785         }
 786
 787         pkt->app_tag = cpu_to_le16(0);
 788         pkt->app_tag_mask[0] = 0x0;
 789         pkt->app_tag_mask[1] = 0x0;
 790 }
 791
 792 int
 793 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 794         uint32_t *partial)
 795 {
 796         struct scatterlist *sg;
 797         uint32_t cumulative_partial, sg_len;
 798         dma_addr_t sg_dma_addr;
 799
 800         if (sgx->num_bytes == sgx->tot_bytes)
 801                 return 0;
 802
 803         sg = sgx->cur_sg;
 804         cumulative_partial = sgx->tot_partial;
 805
 806         sg_dma_addr = sg_dma_address(sg);
 807         sg_len = sg_dma_len(sg);
 808
 809         sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 810
 811         if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
 812                 sgx->dma_len = (blk_sz - cumulative_partial);
 813                 sgx->tot_partial = 0;
 814                 sgx->num_bytes += blk_sz;
 815                 *partial = 0;
 816         } else {
 817                 sgx->dma_len = sg_len - sgx->bytes_consumed;
 818                 sgx->tot_partial += sgx->dma_len;
 819                 *partial = 1;
 820         }
 821
 822         sgx->bytes_consumed += sgx->dma_len;
 823
 824         if (sg_len == sgx->bytes_consumed) {
 825                 sg = sg_next(sg);
 826                 sgx->num_sg++;
 827                 sgx->cur_sg = sg;
 828                 sgx->bytes_consumed = 0;
 829         }
 830
 831         return 1;
 832 }
 833
 834 int
 835 qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
 836         struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 837 {
 838         void *next_dsd;
 839         uint8_t avail_dsds = 0;
 840         uint32_t dsd_list_len;
 841         struct dsd_dma *dsd_ptr;
 842         struct scatterlist *sg_prot;
 843         struct dsd64 *cur_dsd = dsd;
 844         uint16_t        used_dsds = tot_dsds;
 845         uint32_t        prot_int; /* protection interval */
 846         uint32_t        partial;
 847         struct qla2_sgx sgx;
 848         dma_addr_t      sle_dma;
 849         uint32_t        sle_dma_len, tot_prot_dma_len = 0;
 850         struct scsi_cmnd *cmd;
 851
 852         memset(&sgx, 0, sizeof(struct qla2_sgx));
 853         if (sp) {
 854                 cmd = GET_CMD_SP(sp);
 855                 prot_int = scsi_prot_interval(cmd);
 856
 857                 sgx.tot_bytes = scsi_bufflen(cmd);
 858                 sgx.cur_sg = scsi_sglist(cmd);
 859                 sgx.sp = sp;
 860
 861                 sg_prot = scsi_prot_sglist(cmd);
 862         } else if (tc) {
 863                 prot_int      = tc->blk_sz;
 864                 sgx.tot_bytes = tc->bufflen;
 865                 sgx.cur_sg    = tc->sg;
 866                 sg_prot       = tc->prot_sg;
 867         } else {
 868                 BUG();
 869                 return 1;
 870         }
 871
 872         while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 873
 874                 sle_dma = sgx.dma_addr;
 875                 sle_dma_len = sgx.dma_len;
 876 alloc_and_fill:
 877                 /* Allocate additional continuation packets? */
 878                 if (avail_dsds == 0) {
 879                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 880                                         QLA_DSDS_PER_IOCB : used_dsds;
 881                         dsd_list_len = (avail_dsds + 1) * 12;
 882                         used_dsds -= avail_dsds;
 883
 884                         /* allocate tracking DS */
 885                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 886                         if (!dsd_ptr)
 887                                 return 1;
 888
 889                         /* allocate new list */
 890                         dsd_ptr->dsd_addr = next_dsd =
 891                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 892                                 &dsd_ptr->dsd_list_dma);
 893
 894                         if (!next_dsd) {
 895                                 /*
 896                                  * Need to cleanup only this dsd_ptr, rest
 897                                  * will be done by sp_free_dma()
 898                                  */
 899                                 kfree(dsd_ptr);
 900                                 return 1;
 901                         }
 902
 903                         if (sp) {
 904                                 list_add_tail(&dsd_ptr->list,
 905                                               &sp->u.scmd.crc_ctx->dsd_list);
 906
 907                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
 908                         } else {
 909                                 list_add_tail(&dsd_ptr->list,
 910                                     &(tc->ctx->dsd_list));
 911                                 *tc->ctx_dsd_alloced = 1;
 912                         }
 913
 914
 915                         /* add new list to cmd iocb or last list */
 916                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
 917                                            &cur_dsd->address);
 918                         cur_dsd->length = cpu_to_le32(dsd_list_len);
 919                         cur_dsd = next_dsd;
 920                 }
 921                 put_unaligned_le64(sle_dma, &cur_dsd->address);
 922                 cur_dsd->length = cpu_to_le32(sle_dma_len);
 923                 cur_dsd++;
 924                 avail_dsds--;
 925
 926                 if (partial == 0) {
 927                         /* Got a full protection interval */
 928                         sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
 929                         sle_dma_len = 8;
 930
 931                         tot_prot_dma_len += sle_dma_len;
 932                         if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
 933                                 tot_prot_dma_len = 0;
 934                                 sg_prot = sg_next(sg_prot);
 935                         }
 936
 937                         partial = 1; /* So as to not re-enter this block */
 938                         goto alloc_and_fill;
 939                 }
 940         }
 941         /* Null termination */
 942         cur_dsd->address = 0;
 943         cur_dsd->length = 0;
 944         cur_dsd++;
 945         return 0;
 946 }
 947
 948 int
 949 qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp,
 950         struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 951 {
 952         void *next_dsd;
 953         uint8_t avail_dsds = 0;
 954         uint32_t dsd_list_len;
 955         struct dsd_dma *dsd_ptr;
 956         struct scatterlist *sg, *sgl;
 957         struct dsd64 *cur_dsd = dsd;
 958         int     i;
 959         uint16_t        used_dsds = tot_dsds;
 960         struct scsi_cmnd *cmd;
 961
 962         if (sp) {
 963                 cmd = GET_CMD_SP(sp);
 964                 sgl = scsi_sglist(cmd);
 965         } else if (tc) {
 966                 sgl = tc->sg;
 967         } else {
 968                 BUG();
 969                 return 1;
 970         }
 971
 972
 973         for_each_sg(sgl, sg, tot_dsds, i) {
 974                 /* Allocate additional continuation packets? */
 975                 if (avail_dsds == 0) {
 976                         avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 977                                         QLA_DSDS_PER_IOCB : used_dsds;
 978                         dsd_list_len = (avail_dsds + 1) * 12;
 979                         used_dsds -= avail_dsds;
 980
 981                         /* allocate tracking DS */
 982                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 983                         if (!dsd_ptr)
 984                                 return 1;
 985
 986                         /* allocate new list */
 987                         dsd_ptr->dsd_addr = next_dsd =
 988                             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 989                                 &dsd_ptr->dsd_list_dma);
 990
 991                         if (!next_dsd) {
 992                                 /*
 993                                  * Need to cleanup only this dsd_ptr, rest
 994                                  * will be done by sp_free_dma()
 995                                  */
 996                                 kfree(dsd_ptr);
 997                                 return 1;
 998                         }
 999
1000                         if (sp) {
1001                                 list_add_tail(&dsd_ptr->list,
1002                                               &sp->u.scmd.crc_ctx->dsd_list);
1003
1004                                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
1005                         } else {
1006                                 list_add_tail(&dsd_ptr->list,
1007                                     &(tc->ctx->dsd_list));
1008                                 *tc->ctx_dsd_alloced = 1;
1009                         }
1010
1011                         /* add new list to cmd iocb or last list */
1012                         put_unaligned_le64(dsd_ptr->dsd_list_dma,
1013                                            &cur_dsd->address);
1014                         cur_dsd->length = cpu_to_le32(dsd_list_len);
1015                         cur_dsd = next_dsd;
1016                 }
1017                 append_dsd64(&cur_dsd, sg);
1018                 avail_dsds--;
1019
1020         }
1021         /* Null termination */
1022         cur_dsd->address = 0;
1023         cur_dsd->length = 0;
1024         cur_dsd++;
1025         return 0;
1026 }
1027
1028 int
1029 qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
1030         struct dsd64 *cur_dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1031 {
1032         struct dsd_dma *dsd_ptr = NULL, *dif_dsd, *nxt_dsd;
1033         struct scatterlist *sg, *sgl;
1034         struct crc_context *difctx = NULL;
1035         struct scsi_qla_host *vha;
1036         uint dsd_list_len;
1037         uint avail_dsds = 0;
1038         uint used_dsds = tot_dsds;
1039         bool dif_local_dma_alloc = false;
1040         bool direction_to_device = false;
1041         int i;
1042
1043         if (sp) {
1044                 struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1045
1046                 sgl = scsi_prot_sglist(cmd);
1047                 vha = sp->vha;
1048                 difctx = sp->u.scmd.crc_ctx;
1049                 direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
1050                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1051                   "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
1052                         __func__, cmd, difctx, sp);
1053         } else if (tc) {
1054                 vha = tc->vha;
1055                 sgl = tc->prot_sg;
1056                 difctx = tc->ctx;
1057                 direction_to_device = tc->dma_data_direction == DMA_TO_DEVICE;
1058         } else {
1059                 BUG();
1060                 return 1;
1061         }
1062
1063         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1064             "%s: enter (write=%u)\n", __func__, direction_to_device);
1065
1066         /* if initiator doing write or target doing read */
1067         if (direction_to_device) {
1068                 for_each_sg(sgl, sg, tot_dsds, i) {
1069                         u64 sle_phys = sg_phys(sg);
1070
1071                         /* If SGE addr + len flips bits in upper 32-bits */
1072                         if (MSD(sle_phys + sg->length) ^ MSD(sle_phys)) {
1073                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe022,
1074                                     "%s: page boundary crossing (phys=%llx len=%x)\n",
1075                                     __func__, sle_phys, sg->length);
1076
1077                                 if (difctx) {
1078                                         ha->dif_bundle_crossed_pages++;
1079                                         dif_local_dma_alloc = true;
1080                                 } else {
1081                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1082                                             vha, 0xe022,
1083                                             "%s: difctx pointer is NULL\n",
1084                                             __func__);
1085                                 }
1086                                 break;
1087                         }
1088                 }
1089                 ha->dif_bundle_writes++;
1090         } else {
1091                 ha->dif_bundle_reads++;
1092         }
1093
1094         if (ql2xdifbundlinginternalbuffers)
1095                 dif_local_dma_alloc = direction_to_device;
1096
1097         if (dif_local_dma_alloc) {
1098                 u32 track_difbundl_buf = 0;
1099                 u32 ldma_sg_len = 0;
1100                 u8 ldma_needed = 1;
1101
1102                 difctx->no_dif_bundl = 0;
1103                 difctx->dif_bundl_len = 0;
1104
1105                 /* Track DSD buffers */
1106                 INIT_LIST_HEAD(&difctx->ldif_dsd_list);
1107                 /* Track local DMA buffers */
1108                 INIT_LIST_HEAD(&difctx->ldif_dma_hndl_list);
1109
1110                 for_each_sg(sgl, sg, tot_dsds, i) {
1111                         u32 sglen = sg_dma_len(sg);
1112
1113                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe023,
1114                             "%s: sg[%x] (phys=%llx sglen=%x) ldma_sg_len: %x dif_bundl_len: %x ldma_needed: %x\n",
1115                             __func__, i, (u64)sg_phys(sg), sglen, ldma_sg_len,
1116                             difctx->dif_bundl_len, ldma_needed);
1117
1118                         while (sglen) {
1119                                 u32 xfrlen = 0;
1120
1121                                 if (ldma_needed) {
1122                                         /*
1123                                          * Allocate list item to store
1124                                          * the DMA buffers
1125                                          */
1126                                         dsd_ptr = kzalloc(sizeof(*dsd_ptr),
1127                                             GFP_ATOMIC);
1128                                         if (!dsd_ptr) {
1129                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1130                                                     "%s: failed alloc dsd_ptr\n",
1131                                                     __func__);
1132                                                 return 1;
1133                                         }
1134                                         ha->dif_bundle_kallocs++;
1135
1136                                         /* allocate dma buffer */
1137                                         dsd_ptr->dsd_addr = dma_pool_alloc
1138                                                 (ha->dif_bundl_pool, GFP_ATOMIC,
1139                                                  &dsd_ptr->dsd_list_dma);
1140                                         if (!dsd_ptr->dsd_addr) {
1141                                                 ql_dbg(ql_dbg_tgt, vha, 0xe024,
1142                                                     "%s: failed alloc ->dsd_ptr\n",
1143                                                     __func__);
1144                                                 /*
1145                                                  * need to cleanup only this
1146                                                  * dsd_ptr rest will be done
1147                                                  * by sp_free_dma()
1148                                                  */
1149                                                 kfree(dsd_ptr);
1150                                                 ha->dif_bundle_kallocs--;
1151                                                 return 1;
1152                                         }
1153                                         ha->dif_bundle_dma_allocs++;
1154                                         ldma_needed = 0;
1155                                         difctx->no_dif_bundl++;
1156                                         list_add_tail(&dsd_ptr->list,
1157                                             &difctx->ldif_dma_hndl_list);
1158                                 }
1159
1160                                 /* xfrlen is min of dma pool size and sglen */
1161                                 xfrlen = (sglen >
1162                                    (DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len)) ?
1163                                     DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len :
1164                                     sglen;
1165
1166                                 /* replace with local allocated dma buffer */
1167                                 sg_pcopy_to_buffer(sgl, sg_nents(sgl),
1168                                     dsd_ptr->dsd_addr + ldma_sg_len, xfrlen,
1169                                     difctx->dif_bundl_len);
1170                                 difctx->dif_bundl_len += xfrlen;
1171                                 sglen -= xfrlen;
1172                                 ldma_sg_len += xfrlen;
1173                                 if (ldma_sg_len == DIF_BUNDLING_DMA_POOL_SIZE ||
1174                                     sg_is_last(sg)) {
1175                                         ldma_needed = 1;
1176                                         ldma_sg_len = 0;
1177                                 }
1178                         }
1179                 }
1180
1181                 track_difbundl_buf = used_dsds = difctx->no_dif_bundl;
1182                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe025,
1183                     "dif_bundl_len=%x, no_dif_bundl=%x track_difbundl_buf: %x\n",
1184                     difctx->dif_bundl_len, difctx->no_dif_bundl,
1185                     track_difbundl_buf);
1186
1187                 if (sp)
1188                         sp->flags |= SRB_DIF_BUNDL_DMA_VALID;
1189                 else
1190                         tc->prot_flags = DIF_BUNDL_DMA_VALID;
1191
1192                 list_for_each_entry_safe(dif_dsd, nxt_dsd,
1193                     &difctx->ldif_dma_hndl_list, list) {
1194                         u32 sglen = (difctx->dif_bundl_len >
1195                             DIF_BUNDLING_DMA_POOL_SIZE) ?
1196                             DIF_BUNDLING_DMA_POOL_SIZE : difctx->dif_bundl_len;
1197
1198                         BUG_ON(track_difbundl_buf == 0);
1199
1200                         /* Allocate additional continuation packets? */
1201                         if (avail_dsds == 0) {
1202                                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha,
1203                                     0xe024,
1204                                     "%s: adding continuation iocb's\n",
1205                                     __func__);
1206                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1207                                     QLA_DSDS_PER_IOCB : used_dsds;
1208                                 dsd_list_len = (avail_dsds + 1) * 12;
1209                                 used_dsds -= avail_dsds;
1210
1211                                 /* allocate tracking DS */
1212                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1213                                 if (!dsd_ptr) {
1214                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1215                                             "%s: failed alloc dsd_ptr\n",
1216                                             __func__);
1217                                         return 1;
1218                                 }
1219                                 ha->dif_bundle_kallocs++;
1220
1221                                 difctx->no_ldif_dsd++;
1222                                 /* allocate new list */
1223                                 dsd_ptr->dsd_addr =
1224                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1225                                         &dsd_ptr->dsd_list_dma);
1226                                 if (!dsd_ptr->dsd_addr) {
1227                                         ql_dbg(ql_dbg_tgt, vha, 0xe026,
1228                                             "%s: failed alloc ->dsd_addr\n",
1229                                             __func__);
1230                                         /*
1231                                          * need to cleanup only this dsd_ptr
1232                                          *  rest will be done by sp_free_dma()
1233                                          */
1234                                         kfree(dsd_ptr);
1235                                         ha->dif_bundle_kallocs--;
1236                                         return 1;
1237                                 }
1238                                 ha->dif_bundle_dma_allocs++;
1239
1240                                 if (sp) {
1241                                         list_add_tail(&dsd_ptr->list,
1242                                             &difctx->ldif_dsd_list);
1243                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1244                                 } else {
1245                                         list_add_tail(&dsd_ptr->list,
1246                                             &difctx->ldif_dsd_list);
1247                                         tc->ctx_dsd_alloced = 1;
1248                                 }
1249
1250                                 /* add new list to cmd iocb or last list */
1251                                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
1252                                                    &cur_dsd->address);
1253                                 cur_dsd->length = cpu_to_le32(dsd_list_len);
1254                                 cur_dsd = dsd_ptr->dsd_addr;
1255                         }
1256                         put_unaligned_le64(dif_dsd->dsd_list_dma,
1257                                            &cur_dsd->address);
1258                         cur_dsd->length = cpu_to_le32(sglen);
1259                         cur_dsd++;
1260                         avail_dsds--;
1261                         difctx->dif_bundl_len -= sglen;
1262                         track_difbundl_buf--;
1263                 }
1264
1265                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe026,
1266                     "%s: no_ldif_dsd:%x, no_dif_bundl:%x\n", __func__,
1267                         difctx->no_ldif_dsd, difctx->no_dif_bundl);
1268         } else {
1269                 for_each_sg(sgl, sg, tot_dsds, i) {
1270                         /* Allocate additional continuation packets? */
1271                         if (avail_dsds == 0) {
1272                                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1273                                     QLA_DSDS_PER_IOCB : used_dsds;
1274                                 dsd_list_len = (avail_dsds + 1) * 12;
1275                                 used_dsds -= avail_dsds;
1276
1277                                 /* allocate tracking DS */
1278                                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1279                                 if (!dsd_ptr) {
1280                                         ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1281                                             vha, 0xe027,
1282                                             "%s: failed alloc dsd_dma...\n",
1283                                             __func__);
1284                                         return 1;
1285                                 }
1286
1287                                 /* allocate new list */
1288                                 dsd_ptr->dsd_addr =
1289                                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1290                                         &dsd_ptr->dsd_list_dma);
1291                                 if (!dsd_ptr->dsd_addr) {
1292                                         /* need to cleanup only this dsd_ptr */
1293                                         /* rest will be done by sp_free_dma() */
1294                                         kfree(dsd_ptr);
1295                                         return 1;
1296                                 }
1297
1298                                 if (sp) {
1299                                         list_add_tail(&dsd_ptr->list,
1300                                             &difctx->dsd_list);
1301                                         sp->flags |= SRB_CRC_CTX_DSD_VALID;
1302                                 } else {
1303                                         list_add_tail(&dsd_ptr->list,
1304                                             &difctx->dsd_list);
1305                                         tc->ctx_dsd_alloced = 1;
1306                                 }
1307
1308                                 /* add new list to cmd iocb or last list */
1309                                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
1310                                                    &cur_dsd->address);
1311                                 cur_dsd->length = cpu_to_le32(dsd_list_len);
1312                                 cur_dsd = dsd_ptr->dsd_addr;
1313                         }
1314                         append_dsd64(&cur_dsd, sg);
1315                         avail_dsds--;
1316                 }
1317         }
1318         /* Null termination */
1319         cur_dsd->address = 0;
1320         cur_dsd->length = 0;
1321         cur_dsd++;
1322         return 0;
1323 }
1324
1325 /**
1326  * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
1327  *                                                      Type 6 IOCB types.
1328  *
1329  * @sp: SRB command to process
1330  * @cmd_pkt: Command type 3 IOCB
1331  * @tot_dsds: Total number of segments to transfer
1332  * @tot_prot_dsds: Total number of segments with protection information
1333  * @fw_prot_opts: Protection options to be passed to firmware
1334  */
1335 static inline int
1336 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
1337     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
1338 {
1339         struct dsd64            *cur_dsd;
1340         __be32                  *fcp_dl;
1341         scsi_qla_host_t         *vha;
1342         struct scsi_cmnd        *cmd;
1343         uint32_t                total_bytes = 0;
1344         uint32_t                data_bytes;
1345         uint32_t                dif_bytes;
1346         uint8_t                 bundling = 1;
1347         uint16_t                blk_size;
1348         struct crc_context      *crc_ctx_pkt = NULL;
1349         struct qla_hw_data      *ha;
1350         uint8_t                 additional_fcpcdb_len;
1351         uint16_t                fcp_cmnd_len;
1352         struct fcp_cmnd         *fcp_cmnd;
1353         dma_addr_t              crc_ctx_dma;
1354
1355         cmd = GET_CMD_SP(sp);
1356
1357         /* Update entry type to indicate Command Type CRC_2 IOCB */
1358         put_unaligned_le32(COMMAND_TYPE_CRC_2, &cmd_pkt->entry_type);
1359
1360         vha = sp->vha;
1361         ha = vha->hw;
1362
1363         /* No data transfer */
1364         data_bytes = scsi_bufflen(cmd);
1365         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1366                 cmd_pkt->byte_count = cpu_to_le32(0);
1367                 return QLA_SUCCESS;
1368         }
1369
1370         cmd_pkt->vp_index = sp->vha->vp_idx;
1371
1372         /* Set transfer direction */
1373         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1374                 cmd_pkt->control_flags =
1375                     cpu_to_le16(CF_WRITE_DATA);
1376         } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
1377                 cmd_pkt->control_flags =
1378                     cpu_to_le16(CF_READ_DATA);
1379         }
1380
1381         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1382             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
1383             (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
1384             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1385                 bundling = 0;
1386
1387         /* Allocate CRC context from global pool */
1388         crc_ctx_pkt = sp->u.scmd.crc_ctx =
1389             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1390
1391         if (!crc_ctx_pkt)
1392                 goto crc_queuing_error;
1393
1394         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
1395
1396         sp->flags |= SRB_CRC_CTX_DMA_VALID;
1397
1398         /* Set handle */
1399         crc_ctx_pkt->handle = cmd_pkt->handle;
1400
1401         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
1402
1403         qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1404             &crc_ctx_pkt->ref_tag, tot_prot_dsds);
1405
1406         put_unaligned_le64(crc_ctx_dma, &cmd_pkt->crc_context_address);
1407         cmd_pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
1408
1409         /* Determine SCSI command length -- align to 4 byte boundary */
1410         if (cmd->cmd_len > 16) {
1411                 additional_fcpcdb_len = cmd->cmd_len - 16;
1412                 if ((cmd->cmd_len % 4) != 0) {
1413                         /* SCSI cmd > 16 bytes must be multiple of 4 */
1414                         goto crc_queuing_error;
1415                 }
1416                 fcp_cmnd_len = 12 + cmd->cmd_len + 4;
1417         } else {
1418                 additional_fcpcdb_len = 0;
1419                 fcp_cmnd_len = 12 + 16 + 4;
1420         }
1421
1422         fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
1423
1424         fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
1425         if (cmd->sc_data_direction == DMA_TO_DEVICE)
1426                 fcp_cmnd->additional_cdb_len |= 1;
1427         else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1428                 fcp_cmnd->additional_cdb_len |= 2;
1429
1430         int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1431         memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
1432         cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
1433         put_unaligned_le64(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF,
1434                            &cmd_pkt->fcp_cmnd_dseg_address);
1435         fcp_cmnd->task_management = 0;
1436         fcp_cmnd->task_attribute = TSK_SIMPLE;
1437
1438         cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
1439
1440         /* Compute dif len and adjust data len to incude protection */
1441         dif_bytes = 0;
1442         blk_size = cmd->device->sector_size;
1443         dif_bytes = (data_bytes / blk_size) * 8;
1444
1445         switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1446         case SCSI_PROT_READ_INSERT:
1447         case SCSI_PROT_WRITE_STRIP:
1448                 total_bytes = data_bytes;
1449                 data_bytes += dif_bytes;
1450                 break;
1451
1452         case SCSI_PROT_READ_STRIP:
1453         case SCSI_PROT_WRITE_INSERT:
1454         case SCSI_PROT_READ_PASS:
1455         case SCSI_PROT_WRITE_PASS:
1456                 total_bytes = data_bytes + dif_bytes;
1457                 break;
1458         default:
1459                 BUG();
1460         }
1461
1462         if (!qla2x00_hba_err_chk_enabled(sp))
1463                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1464         /* HBA error checking enabled */
1465         else if (IS_PI_UNINIT_CAPABLE(ha)) {
1466                 if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
1467                     || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1468                         SCSI_PROT_DIF_TYPE2))
1469                         fw_prot_opts |= BIT_10;
1470                 else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1471                     SCSI_PROT_DIF_TYPE3)
1472                         fw_prot_opts |= BIT_11;
1473         }
1474
1475         if (!bundling) {
1476                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
1477         } else {
1478                 /*
1479                  * Configure Bundling if we need to fetch interlaving
1480                  * protection PCI accesses
1481                  */
1482                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
1483                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
1484                 crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
1485                                                         tot_prot_dsds);
1486                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
1487         }
1488
1489         /* Finish the common fields of CRC pkt */
1490         crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
1491         crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
1492         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
1493         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
1494         /* Fibre channel byte count */
1495         cmd_pkt->byte_count = cpu_to_le32(total_bytes);
1496         fcp_dl = (__be32 *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
1497             additional_fcpcdb_len);
1498         *fcp_dl = htonl(total_bytes);
1499
1500         if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1501                 cmd_pkt->byte_count = cpu_to_le32(0);
1502                 return QLA_SUCCESS;
1503         }
1504         /* Walks data segments */
1505
1506         cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1507
1508         if (!bundling && tot_prot_dsds) {
1509                 if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
1510                         cur_dsd, tot_dsds, NULL))
1511                         goto crc_queuing_error;
1512         } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1513                         (tot_dsds - tot_prot_dsds), NULL))
1514                 goto crc_queuing_error;
1515
1516         if (bundling && tot_prot_dsds) {
1517                 /* Walks dif segments */
1518                 cmd_pkt->control_flags |= cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
1519                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
1520                 if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
1521                                 tot_prot_dsds, NULL))
1522                         goto crc_queuing_error;
1523         }
1524         return QLA_SUCCESS;
1525
1526 crc_queuing_error:
1527         /* Cleanup will be performed by the caller */
1528
1529         return QLA_FUNCTION_FAILED;
1530 }
1531
1532 /**
1533  * qla24xx_start_scsi() - Send a SCSI command to the ISP
1534  * @sp: command to send to the ISP
1535  *
1536  * Returns non-zero if a failure occurred, else zero.
1537  */
1538 int
1539 qla24xx_start_scsi(srb_t *sp)
1540 {
1541         int             nseg;
1542         unsigned long   flags;
1543         uint32_t        *clr_ptr;
1544         uint32_t        handle;
1545         struct cmd_type_7 *cmd_pkt;
1546         uint16_t        cnt;
1547         uint16_t        req_cnt;
1548         uint16_t        tot_dsds;
1549         struct req_que *req = NULL;
1550         struct rsp_que *rsp;
1551         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1552         struct scsi_qla_host *vha = sp->vha;
1553         struct qla_hw_data *ha = vha->hw;
1554
1555         /* Setup device pointers. */
1556         req = vha->req;
1557         rsp = req->rsp;
1558
1559         /* So we know we haven't pci_map'ed anything yet */
1560         tot_dsds = 0;
1561
1562         /* Send marker if required */
1563         if (vha->marker_needed != 0) {
1564                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1565                     QLA_SUCCESS)
1566                         return QLA_FUNCTION_FAILED;
1567                 vha->marker_needed = 0;
1568         }
1569
1570         /* Acquire ring specific lock */
1571         spin_lock_irqsave(&ha->hardware_lock, flags);
1572
1573         handle = qla2xxx_get_next_handle(req);
1574         if (handle == 0)
1575                 goto queuing_error;
1576
1577         /* Map the sg table so we have an accurate count of sg entries needed */
1578         if (scsi_sg_count(cmd)) {
1579                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1580                     scsi_sg_count(cmd), cmd->sc_data_direction);
1581                 if (unlikely(!nseg))
1582                         goto queuing_error;
1583         } else
1584                 nseg = 0;
1585
1586         tot_dsds = nseg;
1587         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1588
1589         sp->iores.res_type = RESOURCE_INI;
1590         sp->iores.iocb_cnt = req_cnt;
1591         if (qla_get_iocbs(sp->qpair, &sp->iores))
1592                 goto queuing_error;
1593
1594         if (req->cnt < (req_cnt + 2)) {
1595                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1596                         cnt = *req->out_ptr;
1597                 } else {
1598                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1599                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1600                                 goto queuing_error;
1601                 }
1602
1603                 if (req->ring_index < cnt)
1604                         req->cnt = cnt - req->ring_index;
1605                 else
1606                         req->cnt = req->length -
1607                                 (req->ring_index - cnt);
1608                 if (req->cnt < (req_cnt + 2))
1609                         goto queuing_error;
1610         }
1611
1612         /* Build command packet. */
1613         req->current_outstanding_cmd = handle;
1614         req->outstanding_cmds[handle] = sp;
1615         sp->handle = handle;
1616         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1617         req->cnt -= req_cnt;
1618
1619         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1620         cmd_pkt->handle = make_handle(req->id, handle);
1621
1622         /* Zero out remaining portion of packet. */
1623         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1624         clr_ptr = (uint32_t *)cmd_pkt + 2;
1625         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1626         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1627
1628         /* Set NPORT-ID and LUN number*/
1629         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1630         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1631         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1632         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1633         cmd_pkt->vp_index = sp->vha->vp_idx;
1634
1635         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1636         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1637
1638         cmd_pkt->task = TSK_SIMPLE;
1639
1640         /* Load SCSI command packet. */
1641         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1642         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1643
1644         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1645
1646         /* Build IOCB segments */
1647         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
1648
1649         /* Set total data segment count. */
1650         cmd_pkt->entry_count = (uint8_t)req_cnt;
1651         wmb();
1652         /* Adjust ring index. */
1653         req->ring_index++;
1654         if (req->ring_index == req->length) {
1655                 req->ring_index = 0;
1656                 req->ring_ptr = req->ring;
1657         } else
1658                 req->ring_ptr++;
1659
1660         sp->qpair->cmd_cnt++;
1661         sp->flags |= SRB_DMA_VALID;
1662
1663         /* Set chip new ring index. */
1664         wrt_reg_dword(req->req_q_in, req->ring_index);
1665
1666         /* Manage unprocessed RIO/ZIO commands in response queue. */
1667         if (vha->flags.process_response_queue &&
1668             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1669                 qla24xx_process_response_queue(vha, rsp);
1670
1671         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1672         return QLA_SUCCESS;
1673
1674 queuing_error:
1675         if (tot_dsds)
1676                 scsi_dma_unmap(cmd);
1677
1678         qla_put_iocbs(sp->qpair, &sp->iores);
1679         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1680
1681         return QLA_FUNCTION_FAILED;
1682 }
1683
1684 /**
1685  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1686  * @sp: command to send to the ISP
1687  *
1688  * Returns non-zero if a failure occurred, else zero.
1689  */
1690 int
1691 qla24xx_dif_start_scsi(srb_t *sp)
1692 {
1693         int                     nseg;
1694         unsigned long           flags;
1695         uint32_t                *clr_ptr;
1696         uint32_t                handle;
1697         uint16_t                cnt;
1698         uint16_t                req_cnt = 0;
1699         uint16_t                tot_dsds;
1700         uint16_t                tot_prot_dsds;
1701         uint16_t                fw_prot_opts = 0;
1702         struct req_que          *req = NULL;
1703         struct rsp_que          *rsp = NULL;
1704         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1705         struct scsi_qla_host    *vha = sp->vha;
1706         struct qla_hw_data      *ha = vha->hw;
1707         struct cmd_type_crc_2   *cmd_pkt;
1708         uint32_t                status = 0;
1709
1710 #define QDSS_GOT_Q_SPACE        BIT_0
1711
1712         /* Only process protection or >16 cdb in this routine */
1713         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1714                 if (cmd->cmd_len <= 16)
1715                         return qla24xx_start_scsi(sp);
1716         }
1717
1718         /* Setup device pointers. */
1719         req = vha->req;
1720         rsp = req->rsp;
1721
1722         /* So we know we haven't pci_map'ed anything yet */
1723         tot_dsds = 0;
1724
1725         /* Send marker if required */
1726         if (vha->marker_needed != 0) {
1727                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1728                     QLA_SUCCESS)
1729                         return QLA_FUNCTION_FAILED;
1730                 vha->marker_needed = 0;
1731         }
1732
1733         /* Acquire ring specific lock */
1734         spin_lock_irqsave(&ha->hardware_lock, flags);
1735
1736         handle = qla2xxx_get_next_handle(req);
1737         if (handle == 0)
1738                 goto queuing_error;
1739
1740         /* Compute number of required data segments */
1741         /* Map the sg table so we have an accurate count of sg entries needed */
1742         if (scsi_sg_count(cmd)) {
1743                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1744                     scsi_sg_count(cmd), cmd->sc_data_direction);
1745                 if (unlikely(!nseg))
1746                         goto queuing_error;
1747                 else
1748                         sp->flags |= SRB_DMA_VALID;
1749
1750                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1751                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1752                         struct qla2_sgx sgx;
1753                         uint32_t        partial;
1754
1755                         memset(&sgx, 0, sizeof(struct qla2_sgx));
1756                         sgx.tot_bytes = scsi_bufflen(cmd);
1757                         sgx.cur_sg = scsi_sglist(cmd);
1758                         sgx.sp = sp;
1759
1760                         nseg = 0;
1761                         while (qla24xx_get_one_block_sg(
1762                             cmd->device->sector_size, &sgx, &partial))
1763                                 nseg++;
1764                 }
1765         } else
1766                 nseg = 0;
1767
1768         /* number of required data segments */
1769         tot_dsds = nseg;
1770
1771         /* Compute number of required protection segments */
1772         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1773                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1774                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1775                 if (unlikely(!nseg))
1776                         goto queuing_error;
1777                 else
1778                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
1779
1780                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1781                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1782                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1783                 }
1784         } else {
1785                 nseg = 0;
1786         }
1787
1788         req_cnt = 1;
1789         /* Total Data and protection sg segment(s) */
1790         tot_prot_dsds = nseg;
1791         tot_dsds += nseg;
1792
1793         sp->iores.res_type = RESOURCE_INI;
1794         sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1795         if (qla_get_iocbs(sp->qpair, &sp->iores))
1796                 goto queuing_error;
1797
1798         if (req->cnt < (req_cnt + 2)) {
1799                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1800                         cnt = *req->out_ptr;
1801                 } else {
1802                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1803                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1804                                 goto queuing_error;
1805                 }
1806                 if (req->ring_index < cnt)
1807                         req->cnt = cnt - req->ring_index;
1808                 else
1809                         req->cnt = req->length -
1810                                 (req->ring_index - cnt);
1811                 if (req->cnt < (req_cnt + 2))
1812                         goto queuing_error;
1813         }
1814
1815         status |= QDSS_GOT_Q_SPACE;
1816
1817         /* Build header part of command packet (excluding the OPCODE). */
1818         req->current_outstanding_cmd = handle;
1819         req->outstanding_cmds[handle] = sp;
1820         sp->handle = handle;
1821         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1822         req->cnt -= req_cnt;
1823
1824         /* Fill-in common area */
1825         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1826         cmd_pkt->handle = make_handle(req->id, handle);
1827
1828         clr_ptr = (uint32_t *)cmd_pkt + 2;
1829         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1830
1831         /* Set NPORT-ID and LUN number*/
1832         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1833         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1834         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1835         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1836
1837         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1838         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1839
1840         /* Total Data and protection segment(s) */
1841         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1842
1843         /* Build IOCB segments and adjust for data protection segments */
1844         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1845             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1846                 QLA_SUCCESS)
1847                 goto queuing_error;
1848
1849         cmd_pkt->entry_count = (uint8_t)req_cnt;
1850         /* Specify response queue number where completion should happen */
1851         cmd_pkt->entry_status = (uint8_t) rsp->id;
1852         cmd_pkt->timeout = cpu_to_le16(0);
1853         wmb();
1854
1855         /* Adjust ring index. */
1856         req->ring_index++;
1857         if (req->ring_index == req->length) {
1858                 req->ring_index = 0;
1859                 req->ring_ptr = req->ring;
1860         } else
1861                 req->ring_ptr++;
1862
1863         sp->qpair->cmd_cnt++;
1864         /* Set chip new ring index. */
1865         wrt_reg_dword(req->req_q_in, req->ring_index);
1866
1867         /* Manage unprocessed RIO/ZIO commands in response queue. */
1868         if (vha->flags.process_response_queue &&
1869             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1870                 qla24xx_process_response_queue(vha, rsp);
1871
1872         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1873
1874         return QLA_SUCCESS;
1875
1876 queuing_error:
1877         if (status & QDSS_GOT_Q_SPACE) {
1878                 req->outstanding_cmds[handle] = NULL;
1879                 req->cnt += req_cnt;
1880         }
1881         /* Cleanup will be performed by the caller (queuecommand) */
1882
1883         qla_put_iocbs(sp->qpair, &sp->iores);
1884         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1885
1886         return QLA_FUNCTION_FAILED;
1887 }
1888
1889 /**
1890  * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
1891  * @sp: command to send to the ISP
1892  *
1893  * Returns non-zero if a failure occurred, else zero.
1894  */
1895 static int
1896 qla2xxx_start_scsi_mq(srb_t *sp)
1897 {
1898         int             nseg;
1899         unsigned long   flags;
1900         uint32_t        *clr_ptr;
1901         uint32_t        handle;
1902         struct cmd_type_7 *cmd_pkt;
1903         uint16_t        cnt;
1904         uint16_t        req_cnt;
1905         uint16_t        tot_dsds;
1906         struct req_que *req = NULL;
1907         struct rsp_que *rsp;
1908         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1909         struct scsi_qla_host *vha = sp->fcport->vha;
1910         struct qla_hw_data *ha = vha->hw;
1911         struct qla_qpair *qpair = sp->qpair;
1912
1913         /* Acquire qpair specific lock */
1914         spin_lock_irqsave(&qpair->qp_lock, flags);
1915
1916         /* Setup qpair pointers */
1917         req = qpair->req;
1918         rsp = qpair->rsp;
1919
1920         /* So we know we haven't pci_map'ed anything yet */
1921         tot_dsds = 0;
1922
1923         /* Send marker if required */
1924         if (vha->marker_needed != 0) {
1925                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
1926                     QLA_SUCCESS) {
1927                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
1928                         return QLA_FUNCTION_FAILED;
1929                 }
1930                 vha->marker_needed = 0;
1931         }
1932
1933         handle = qla2xxx_get_next_handle(req);
1934         if (handle == 0)
1935                 goto queuing_error;
1936
1937         /* Map the sg table so we have an accurate count of sg entries needed */
1938         if (scsi_sg_count(cmd)) {
1939                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1940                     scsi_sg_count(cmd), cmd->sc_data_direction);
1941                 if (unlikely(!nseg))
1942                         goto queuing_error;
1943         } else
1944                 nseg = 0;
1945
1946         tot_dsds = nseg;
1947         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1948
1949         sp->iores.res_type = RESOURCE_INI;
1950         sp->iores.iocb_cnt = req_cnt;
1951         if (qla_get_iocbs(sp->qpair, &sp->iores))
1952                 goto queuing_error;
1953
1954         if (req->cnt < (req_cnt + 2)) {
1955                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1956                         cnt = *req->out_ptr;
1957                 } else {
1958                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1959                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1960                                 goto queuing_error;
1961                 }
1962
1963                 if (req->ring_index < cnt)
1964                         req->cnt = cnt - req->ring_index;
1965                 else
1966                         req->cnt = req->length -
1967                                 (req->ring_index - cnt);
1968                 if (req->cnt < (req_cnt + 2))
1969                         goto queuing_error;
1970         }
1971
1972         /* Build command packet. */
1973         req->current_outstanding_cmd = handle;
1974         req->outstanding_cmds[handle] = sp;
1975         sp->handle = handle;
1976         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1977         req->cnt -= req_cnt;
1978
1979         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1980         cmd_pkt->handle = make_handle(req->id, handle);
1981
1982         /* Zero out remaining portion of packet. */
1983         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1984         clr_ptr = (uint32_t *)cmd_pkt + 2;
1985         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1986         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1987
1988         /* Set NPORT-ID and LUN number*/
1989         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1990         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1991         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1992         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1993         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
1994
1995         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1996         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1997
1998         cmd_pkt->task = TSK_SIMPLE;
1999
2000         /* Load SCSI command packet. */
2001         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2002         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2003
2004         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2005
2006         /* Build IOCB segments */
2007         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
2008
2009         /* Set total data segment count. */
2010         cmd_pkt->entry_count = (uint8_t)req_cnt;
2011         wmb();
2012         /* Adjust ring index. */
2013         req->ring_index++;
2014         if (req->ring_index == req->length) {
2015                 req->ring_index = 0;
2016                 req->ring_ptr = req->ring;
2017         } else
2018                 req->ring_ptr++;
2019
2020         sp->qpair->cmd_cnt++;
2021         sp->flags |= SRB_DMA_VALID;
2022
2023         /* Set chip new ring index. */
2024         wrt_reg_dword(req->req_q_in, req->ring_index);
2025
2026         /* Manage unprocessed RIO/ZIO commands in response queue. */
2027         if (vha->flags.process_response_queue &&
2028             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2029                 qla24xx_process_response_queue(vha, rsp);
2030
2031         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2032         return QLA_SUCCESS;
2033
2034 queuing_error:
2035         if (tot_dsds)
2036                 scsi_dma_unmap(cmd);
2037
2038         qla_put_iocbs(sp->qpair, &sp->iores);
2039         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2040
2041         return QLA_FUNCTION_FAILED;
2042 }
2043
2044
2045 /**
2046  * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
2047  * @sp: command to send to the ISP
2048  *
2049  * Returns non-zero if a failure occurred, else zero.
2050  */
2051 int
2052 qla2xxx_dif_start_scsi_mq(srb_t *sp)
2053 {
2054         int                     nseg;
2055         unsigned long           flags;
2056         uint32_t                *clr_ptr;
2057         uint32_t                handle;
2058         uint16_t                cnt;
2059         uint16_t                req_cnt = 0;
2060         uint16_t                tot_dsds;
2061         uint16_t                tot_prot_dsds;
2062         uint16_t                fw_prot_opts = 0;
2063         struct req_que          *req = NULL;
2064         struct rsp_que          *rsp = NULL;
2065         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
2066         struct scsi_qla_host    *vha = sp->fcport->vha;
2067         struct qla_hw_data      *ha = vha->hw;
2068         struct cmd_type_crc_2   *cmd_pkt;
2069         uint32_t                status = 0;
2070         struct qla_qpair        *qpair = sp->qpair;
2071
2072 #define QDSS_GOT_Q_SPACE        BIT_0
2073
2074         /* Check for host side state */
2075         if (!qpair->online) {
2076                 cmd->result = DID_NO_CONNECT << 16;
2077                 return QLA_INTERFACE_ERROR;
2078         }
2079
2080         if (!qpair->difdix_supported &&
2081                 scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2082                 cmd->result = DID_NO_CONNECT << 16;
2083                 return QLA_INTERFACE_ERROR;
2084         }
2085
2086         /* Only process protection or >16 cdb in this routine */
2087         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
2088                 if (cmd->cmd_len <= 16)
2089                         return qla2xxx_start_scsi_mq(sp);
2090         }
2091
2092         spin_lock_irqsave(&qpair->qp_lock, flags);
2093
2094         /* Setup qpair pointers */
2095         rsp = qpair->rsp;
2096         req = qpair->req;
2097
2098         /* So we know we haven't pci_map'ed anything yet */
2099         tot_dsds = 0;
2100
2101         /* Send marker if required */
2102         if (vha->marker_needed != 0) {
2103                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
2104                     QLA_SUCCESS) {
2105                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2106                         return QLA_FUNCTION_FAILED;
2107                 }
2108                 vha->marker_needed = 0;
2109         }
2110
2111         handle = qla2xxx_get_next_handle(req);
2112         if (handle == 0)
2113                 goto queuing_error;
2114
2115         /* Compute number of required data segments */
2116         /* Map the sg table so we have an accurate count of sg entries needed */
2117         if (scsi_sg_count(cmd)) {
2118                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2119                     scsi_sg_count(cmd), cmd->sc_data_direction);
2120                 if (unlikely(!nseg))
2121                         goto queuing_error;
2122                 else
2123                         sp->flags |= SRB_DMA_VALID;
2124
2125                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2126                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2127                         struct qla2_sgx sgx;
2128                         uint32_t        partial;
2129
2130                         memset(&sgx, 0, sizeof(struct qla2_sgx));
2131                         sgx.tot_bytes = scsi_bufflen(cmd);
2132                         sgx.cur_sg = scsi_sglist(cmd);
2133                         sgx.sp = sp;
2134
2135                         nseg = 0;
2136                         while (qla24xx_get_one_block_sg(
2137                             cmd->device->sector_size, &sgx, &partial))
2138                                 nseg++;
2139                 }
2140         } else
2141                 nseg = 0;
2142
2143         /* number of required data segments */
2144         tot_dsds = nseg;
2145
2146         /* Compute number of required protection segments */
2147         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
2148                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
2149                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
2150                 if (unlikely(!nseg))
2151                         goto queuing_error;
2152                 else
2153                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
2154
2155                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2156                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2157                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
2158                 }
2159         } else {
2160                 nseg = 0;
2161         }
2162
2163         req_cnt = 1;
2164         /* Total Data and protection sg segment(s) */
2165         tot_prot_dsds = nseg;
2166         tot_dsds += nseg;
2167
2168         sp->iores.res_type = RESOURCE_INI;
2169         sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2170         if (qla_get_iocbs(sp->qpair, &sp->iores))
2171                 goto queuing_error;
2172
2173         if (req->cnt < (req_cnt + 2)) {
2174                 if (IS_SHADOW_REG_CAPABLE(ha)) {
2175                         cnt = *req->out_ptr;
2176                 } else {
2177                         cnt = rd_reg_dword_relaxed(req->req_q_out);
2178                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
2179                                 goto queuing_error;
2180                 }
2181
2182                 if (req->ring_index < cnt)
2183                         req->cnt = cnt - req->ring_index;
2184                 else
2185                         req->cnt = req->length -
2186                                 (req->ring_index - cnt);
2187                 if (req->cnt < (req_cnt + 2))
2188                         goto queuing_error;
2189         }
2190
2191         status |= QDSS_GOT_Q_SPACE;
2192
2193         /* Build header part of command packet (excluding the OPCODE). */
2194         req->current_outstanding_cmd = handle;
2195         req->outstanding_cmds[handle] = sp;
2196         sp->handle = handle;
2197         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2198         req->cnt -= req_cnt;
2199
2200         /* Fill-in common area */
2201         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
2202         cmd_pkt->handle = make_handle(req->id, handle);
2203
2204         clr_ptr = (uint32_t *)cmd_pkt + 2;
2205         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2206
2207         /* Set NPORT-ID and LUN number*/
2208         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2209         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2210         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2211         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2212
2213         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2214         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2215
2216         /* Total Data and protection segment(s) */
2217         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2218
2219         /* Build IOCB segments and adjust for data protection segments */
2220         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
2221             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
2222                 QLA_SUCCESS)
2223                 goto queuing_error;
2224
2225         cmd_pkt->entry_count = (uint8_t)req_cnt;
2226         cmd_pkt->timeout = cpu_to_le16(0);
2227         wmb();
2228
2229         /* Adjust ring index. */
2230         req->ring_index++;
2231         if (req->ring_index == req->length) {
2232                 req->ring_index = 0;
2233                 req->ring_ptr = req->ring;
2234         } else
2235                 req->ring_ptr++;
2236
2237         sp->qpair->cmd_cnt++;
2238         /* Set chip new ring index. */
2239         wrt_reg_dword(req->req_q_in, req->ring_index);
2240
2241         /* Manage unprocessed RIO/ZIO commands in response queue. */
2242         if (vha->flags.process_response_queue &&
2243             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2244                 qla24xx_process_response_queue(vha, rsp);
2245
2246         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2247
2248         return QLA_SUCCESS;
2249
2250 queuing_error:
2251         if (status & QDSS_GOT_Q_SPACE) {
2252                 req->outstanding_cmds[handle] = NULL;
2253                 req->cnt += req_cnt;
2254         }
2255         /* Cleanup will be performed by the caller (queuecommand) */
2256
2257         qla_put_iocbs(sp->qpair, &sp->iores);
2258         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2259
2260         return QLA_FUNCTION_FAILED;
2261 }
2262
2263 /* Generic Control-SRB manipulation functions. */
2264
2265 /* hardware_lock assumed to be held. */
2266
2267 void *
2268 __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
2269 {
2270         scsi_qla_host_t *vha = qpair->vha;
2271         struct qla_hw_data *ha = vha->hw;
2272         struct req_que *req = qpair->req;
2273         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
2274         uint32_t handle;
2275         request_t *pkt;
2276         uint16_t cnt, req_cnt;
2277
2278         pkt = NULL;
2279         req_cnt = 1;
2280         handle = 0;
2281
2282         if (sp && (sp->type != SRB_SCSI_CMD)) {
2283                 /* Adjust entry-counts as needed. */
2284                 req_cnt = sp->iocbs;
2285         }
2286
2287         /* Check for room on request queue. */
2288         if (req->cnt < req_cnt + 2) {
2289                 if (qpair->use_shadow_reg)
2290                         cnt = *req->out_ptr;
2291                 else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
2292                     IS_QLA28XX(ha))
2293                         cnt = rd_reg_dword(&reg->isp25mq.req_q_out);
2294                 else if (IS_P3P_TYPE(ha))
2295                         cnt = rd_reg_dword(reg->isp82.req_q_out);
2296                 else if (IS_FWI2_CAPABLE(ha))
2297                         cnt = rd_reg_dword(&reg->isp24.req_q_out);
2298                 else if (IS_QLAFX00(ha))
2299                         cnt = rd_reg_dword(&reg->ispfx00.req_q_out);
2300                 else
2301                         cnt = qla2x00_debounce_register(
2302                             ISP_REQ_Q_OUT(ha, &reg->isp));
2303
2304                 if (!qpair->use_shadow_reg && cnt == ISP_REG16_DISCONNECT) {
2305                         qla_schedule_eeh_work(vha);
2306                         return NULL;
2307                 }
2308
2309                 if  (req->ring_index < cnt)
2310                         req->cnt = cnt - req->ring_index;
2311                 else
2312                         req->cnt = req->length -
2313                             (req->ring_index - cnt);
2314         }
2315         if (req->cnt < req_cnt + 2)
2316                 goto queuing_error;
2317
2318         if (sp) {
2319                 handle = qla2xxx_get_next_handle(req);
2320                 if (handle == 0) {
2321                         ql_log(ql_log_warn, vha, 0x700b,
2322                             "No room on outstanding cmd array.\n");
2323                         goto queuing_error;
2324                 }
2325
2326                 /* Prep command array. */
2327                 req->current_outstanding_cmd = handle;
2328                 req->outstanding_cmds[handle] = sp;
2329                 sp->handle = handle;
2330         }
2331
2332         /* Prep packet */
2333         req->cnt -= req_cnt;
2334         pkt = req->ring_ptr;
2335         memset(pkt, 0, REQUEST_ENTRY_SIZE);
2336         if (IS_QLAFX00(ha)) {
2337                 wrt_reg_byte((u8 __force __iomem *)&pkt->entry_count, req_cnt);
2338                 wrt_reg_dword((__le32 __force __iomem *)&pkt->handle, handle);
2339         } else {
2340                 pkt->entry_count = req_cnt;
2341                 pkt->handle = handle;
2342         }
2343
2344         return pkt;
2345
2346 queuing_error:
2347         qpair->tgt_counters.num_alloc_iocb_failed++;
2348         return pkt;
2349 }
2350
2351 void *
2352 qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
2353 {
2354         scsi_qla_host_t *vha = qpair->vha;
2355
2356         if (qla2x00_reset_active(vha))
2357                 return NULL;
2358
2359         return __qla2x00_alloc_iocbs(qpair, sp);
2360 }
2361
2362 void *
2363 qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
2364 {
2365         return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
2366 }
2367
2368 static void
2369 qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2370 {
2371         struct srb_iocb *lio = &sp->u.iocb_cmd;
2372
2373         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2374         logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2375         if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
2376                 logio->control_flags |= cpu_to_le16(LCF_NVME_PRLI);
2377                 if (sp->vha->flags.nvme_first_burst)
2378                         logio->io_parameter[0] =
2379                                 cpu_to_le32(NVME_PRLI_SP_FIRST_BURST);
2380                 if (sp->vha->flags.nvme2_enabled) {
2381                         /* Set service parameter BIT_7 for NVME CONF support */
2382                         logio->io_parameter[0] |=
2383                                 cpu_to_le32(NVME_PRLI_SP_CONF);
2384                         /* Set service parameter BIT_8 for SLER support */
2385                         logio->io_parameter[0] |=
2386                                 cpu_to_le32(NVME_PRLI_SP_SLER);
2387                         /* Set service parameter BIT_9 for PI control support */
2388                         logio->io_parameter[0] |=
2389                                 cpu_to_le32(NVME_PRLI_SP_PI_CTRL);
2390                 }
2391         }
2392
2393         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2394         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2395         logio->port_id[1] = sp->fcport->d_id.b.area;
2396         logio->port_id[2] = sp->fcport->d_id.b.domain;
2397         logio->vp_index = sp->vha->vp_idx;
2398 }
2399
2400 static void
2401 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2402 {
2403         struct srb_iocb *lio = &sp->u.iocb_cmd;
2404
2405         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2406         logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2407
2408         if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
2409                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2410         } else {
2411                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2412                 if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
2413                         logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
2414                 if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
2415                         logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
2416         }
2417         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2418         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2419         logio->port_id[1] = sp->fcport->d_id.b.area;
2420         logio->port_id[2] = sp->fcport->d_id.b.domain;
2421         logio->vp_index = sp->vha->vp_idx;
2422 }
2423
2424 static void
2425 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
2426 {
2427         struct qla_hw_data *ha = sp->vha->hw;
2428         struct srb_iocb *lio = &sp->u.iocb_cmd;
2429         uint16_t opts;
2430
2431         mbx->entry_type = MBX_IOCB_TYPE;
2432         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2433         mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
2434         opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
2435         opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
2436         if (HAS_EXTENDED_IDS(ha)) {
2437                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2438                 mbx->mb10 = cpu_to_le16(opts);
2439         } else {
2440                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
2441         }
2442         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2443         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2444             sp->fcport->d_id.b.al_pa);
2445         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2446 }
2447
2448 static void
2449 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2450 {
2451         u16 control_flags = LCF_COMMAND_LOGO;
2452         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2453
2454         if (sp->fcport->explicit_logout) {
2455                 control_flags |= LCF_EXPL_LOGO|LCF_FREE_NPORT;
2456         } else {
2457                 control_flags |= LCF_IMPL_LOGO;
2458
2459                 if (!sp->fcport->keep_nport_handle)
2460                         control_flags |= LCF_FREE_NPORT;
2461         }
2462
2463         logio->control_flags = cpu_to_le16(control_flags);
2464         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2465         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2466         logio->port_id[1] = sp->fcport->d_id.b.area;
2467         logio->port_id[2] = sp->fcport->d_id.b.domain;
2468         logio->vp_index = sp->vha->vp_idx;
2469 }
2470
2471 static void
2472 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
2473 {
2474         struct qla_hw_data *ha = sp->vha->hw;
2475
2476         mbx->entry_type = MBX_IOCB_TYPE;
2477         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2478         mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
2479         mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
2480             cpu_to_le16(sp->fcport->loop_id) :
2481             cpu_to_le16(sp->fcport->loop_id << 8);
2482         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2483         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2484             sp->fcport->d_id.b.al_pa);
2485         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2486         /* Implicit: mbx->mbx10 = 0. */
2487 }
2488
2489 static void
2490 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2491 {
2492         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2493         logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
2494         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2495         logio->vp_index = sp->vha->vp_idx;
2496 }
2497
2498 static void
2499 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
2500 {
2501         struct qla_hw_data *ha = sp->vha->hw;
2502
2503         mbx->entry_type = MBX_IOCB_TYPE;
2504         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2505         mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
2506         if (HAS_EXTENDED_IDS(ha)) {
2507                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2508                 mbx->mb10 = cpu_to_le16(BIT_0);
2509         } else {
2510                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
2511         }
2512         mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
2513         mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
2514         mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2515         mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2516         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2517 }
2518
2519 static void
2520 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2521 {
2522         uint32_t flags;
2523         uint64_t lun;
2524         struct fc_port *fcport = sp->fcport;
2525         scsi_qla_host_t *vha = fcport->vha;
2526         struct qla_hw_data *ha = vha->hw;
2527         struct srb_iocb *iocb = &sp->u.iocb_cmd;
2528         struct req_que *req = vha->req;
2529
2530         flags = iocb->u.tmf.flags;
2531         lun = iocb->u.tmf.lun;
2532
2533         tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2534         tsk->entry_count = 1;
2535         tsk->handle = make_handle(req->id, tsk->handle);
2536         tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2537         tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2538         tsk->control_flags = cpu_to_le32(flags);
2539         tsk->port_id[0] = fcport->d_id.b.al_pa;
2540         tsk->port_id[1] = fcport->d_id.b.area;
2541         tsk->port_id[2] = fcport->d_id.b.domain;
2542         tsk->vp_index = fcport->vha->vp_idx;
2543
2544         if (flags == TCF_LUN_RESET) {
2545                 int_to_scsilun(lun, &tsk->lun);
2546                 host_to_fcp_swap((uint8_t *)&tsk->lun,
2547                         sizeof(tsk->lun));
2548         }
2549 }
2550
2551 void qla2x00_init_timer(srb_t *sp, unsigned long tmo)
2552 {
2553         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
2554         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
2555         sp->free = qla2x00_sp_free;
2556         if (IS_QLAFX00(sp->vha->hw) && sp->type == SRB_FXIOCB_DCMD)
2557                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
2558         sp->start_timer = 1;
2559 }
2560
2561 static void qla2x00_els_dcmd_sp_free(srb_t *sp)
2562 {
2563         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2564
2565         kfree(sp->fcport);
2566
2567         if (elsio->u.els_logo.els_logo_pyld)
2568                 dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
2569                     elsio->u.els_logo.els_logo_pyld,
2570                     elsio->u.els_logo.els_logo_pyld_dma);
2571
2572         del_timer(&elsio->timer);
2573         qla2x00_rel_sp(sp);
2574 }
2575
2576 static void
2577 qla2x00_els_dcmd_iocb_timeout(void *data)
2578 {
2579         srb_t *sp = data;
2580         fc_port_t *fcport = sp->fcport;
2581         struct scsi_qla_host *vha = sp->vha;
2582         struct srb_iocb *lio = &sp->u.iocb_cmd;
2583         unsigned long flags = 0;
2584         int res, h;
2585
2586         ql_dbg(ql_dbg_io, vha, 0x3069,
2587             "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
2588             sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
2589             fcport->d_id.b.al_pa);
2590
2591         /* Abort the exchange */
2592         res = qla24xx_async_abort_cmd(sp, false);
2593         if (res) {
2594                 ql_dbg(ql_dbg_io, vha, 0x3070,
2595                     "mbx abort_command failed.\n");
2596                 spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2597                 for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2598                         if (sp->qpair->req->outstanding_cmds[h] == sp) {
2599                                 sp->qpair->req->outstanding_cmds[h] = NULL;
2600                                 break;
2601                         }
2602                 }
2603                 spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2604                 complete(&lio->u.els_logo.comp);
2605         } else {
2606                 ql_dbg(ql_dbg_io, vha, 0x3071,
2607                     "mbx abort_command success.\n");
2608         }
2609 }
2610
2611 static void qla2x00_els_dcmd_sp_done(srb_t *sp, int res)
2612 {
2613         fc_port_t *fcport = sp->fcport;
2614         struct srb_iocb *lio = &sp->u.iocb_cmd;
2615         struct scsi_qla_host *vha = sp->vha;
2616
2617         ql_dbg(ql_dbg_io, vha, 0x3072,
2618             "%s hdl=%x, portid=%02x%02x%02x done\n",
2619             sp->name, sp->handle, fcport->d_id.b.domain,
2620             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2621
2622         complete(&lio->u.els_logo.comp);
2623 }
2624
2625 int
2626 qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
2627     port_id_t remote_did)
2628 {
2629         srb_t *sp;
2630         fc_port_t *fcport = NULL;
2631         struct srb_iocb *elsio = NULL;
2632         struct qla_hw_data *ha = vha->hw;
2633         struct els_logo_payload logo_pyld;
2634         int rval = QLA_SUCCESS;
2635
2636         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
2637         if (!fcport) {
2638                ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
2639                return -ENOMEM;
2640         }
2641
2642         /* Alloc SRB structure */
2643         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2644         if (!sp) {
2645                 kfree(fcport);
2646                 ql_log(ql_log_info, vha, 0x70e6,
2647                  "SRB allocation failed\n");
2648                 return -ENOMEM;
2649         }
2650
2651         elsio = &sp->u.iocb_cmd;
2652         fcport->loop_id = 0xFFFF;
2653         fcport->d_id.b.domain = remote_did.b.domain;
2654         fcport->d_id.b.area = remote_did.b.area;
2655         fcport->d_id.b.al_pa = remote_did.b.al_pa;
2656
2657         ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
2658             fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
2659
2660         sp->type = SRB_ELS_DCMD;
2661         sp->name = "ELS_DCMD";
2662         sp->fcport = fcport;
2663         elsio->timeout = qla2x00_els_dcmd_iocb_timeout;
2664         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT);
2665         init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
2666         sp->done = qla2x00_els_dcmd_sp_done;
2667         sp->free = qla2x00_els_dcmd_sp_free;
2668
2669         elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
2670                             DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
2671                             GFP_KERNEL);
2672
2673         if (!elsio->u.els_logo.els_logo_pyld) {
2674                 sp->free(sp);
2675                 return QLA_FUNCTION_FAILED;
2676         }
2677
2678         memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
2679
2680         elsio->u.els_logo.els_cmd = els_opcode;
2681         logo_pyld.opcode = els_opcode;
2682         logo_pyld.s_id[0] = vha->d_id.b.al_pa;
2683         logo_pyld.s_id[1] = vha->d_id.b.area;
2684         logo_pyld.s_id[2] = vha->d_id.b.domain;
2685         host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
2686         memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
2687
2688         memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
2689             sizeof(struct els_logo_payload));
2690         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3075, "LOGO buffer:");
2691         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x010a,
2692                        elsio->u.els_logo.els_logo_pyld,
2693                        sizeof(*elsio->u.els_logo.els_logo_pyld));
2694
2695         rval = qla2x00_start_sp(sp);
2696         if (rval != QLA_SUCCESS) {
2697                 sp->free(sp);
2698                 return QLA_FUNCTION_FAILED;
2699         }
2700
2701         ql_dbg(ql_dbg_io, vha, 0x3074,
2702             "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
2703             sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
2704             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2705
2706         wait_for_completion(&elsio->u.els_logo.comp);
2707
2708         sp->free(sp);
2709         return rval;
2710 }
2711
2712 static void
2713 qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2714 {
2715         scsi_qla_host_t *vha = sp->vha;
2716         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2717
2718         els_iocb->entry_type = ELS_IOCB_TYPE;
2719         els_iocb->entry_count = 1;
2720         els_iocb->sys_define = 0;
2721         els_iocb->entry_status = 0;
2722         els_iocb->handle = sp->handle;
2723         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2724         els_iocb->tx_dsd_count = cpu_to_le16(1);
2725         els_iocb->vp_index = vha->vp_idx;
2726         els_iocb->sof_type = EST_SOFI3;
2727         els_iocb->rx_dsd_count = 0;
2728         els_iocb->opcode = elsio->u.els_logo.els_cmd;
2729
2730         els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
2731         els_iocb->d_id[1] = sp->fcport->d_id.b.area;
2732         els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
2733         /* For SID the byte order is different than DID */
2734         els_iocb->s_id[1] = vha->d_id.b.al_pa;
2735         els_iocb->s_id[2] = vha->d_id.b.area;
2736         els_iocb->s_id[0] = vha->d_id.b.domain;
2737
2738         if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
2739                 els_iocb->control_flags = 0;
2740                 els_iocb->tx_byte_count = els_iocb->tx_len =
2741                         cpu_to_le32(sizeof(struct els_plogi_payload));
2742                 put_unaligned_le64(elsio->u.els_plogi.els_plogi_pyld_dma,
2743                                    &els_iocb->tx_address);
2744                 els_iocb->rx_dsd_count = cpu_to_le16(1);
2745                 els_iocb->rx_byte_count = els_iocb->rx_len =
2746                         cpu_to_le32(sizeof(struct els_plogi_payload));
2747                 put_unaligned_le64(elsio->u.els_plogi.els_resp_pyld_dma,
2748                                    &els_iocb->rx_address);
2749
2750                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
2751                     "PLOGI ELS IOCB:\n");
2752                 ql_dump_buffer(ql_log_info, vha, 0x0109,
2753                     (uint8_t *)els_iocb,
2754                     sizeof(*els_iocb));
2755         } else {
2756                 els_iocb->control_flags = cpu_to_le16(1 << 13);
2757                 els_iocb->tx_byte_count =
2758                         cpu_to_le32(sizeof(struct els_logo_payload));
2759                 put_unaligned_le64(elsio->u.els_logo.els_logo_pyld_dma,
2760                                    &els_iocb->tx_address);
2761                 els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
2762
2763                 els_iocb->rx_byte_count = 0;
2764                 els_iocb->rx_address = 0;
2765                 els_iocb->rx_len = 0;
2766                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3076,
2767                        "LOGO ELS IOCB:");
2768                 ql_dump_buffer(ql_log_info, vha, 0x010b,
2769                                els_iocb,
2770                                sizeof(*els_iocb));
2771         }
2772
2773         sp->vha->qla_stats.control_requests++;
2774 }
2775
2776 static void
2777 qla2x00_els_dcmd2_iocb_timeout(void *data)
2778 {
2779         srb_t *sp = data;
2780         fc_port_t *fcport = sp->fcport;
2781         struct scsi_qla_host *vha = sp->vha;
2782         unsigned long flags = 0;
2783         int res, h;
2784
2785         ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
2786             "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
2787             sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
2788
2789         /* Abort the exchange */
2790         res = qla24xx_async_abort_cmd(sp, false);
2791         ql_dbg(ql_dbg_io, vha, 0x3070,
2792             "mbx abort_command %s\n",
2793             (res == QLA_SUCCESS) ? "successful" : "failed");
2794         if (res) {
2795                 spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2796                 for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2797                         if (sp->qpair->req->outstanding_cmds[h] == sp) {
2798                                 sp->qpair->req->outstanding_cmds[h] = NULL;
2799                                 break;
2800                         }
2801                 }
2802                 spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2803                 sp->done(sp, QLA_FUNCTION_TIMEOUT);
2804         }
2805 }
2806
2807 void qla2x00_els_dcmd2_free(scsi_qla_host_t *vha, struct els_plogi *els_plogi)
2808 {
2809         if (els_plogi->els_plogi_pyld)
2810                 dma_free_coherent(&vha->hw->pdev->dev,
2811                                   els_plogi->tx_size,
2812                                   els_plogi->els_plogi_pyld,
2813                                   els_plogi->els_plogi_pyld_dma);
2814
2815         if (els_plogi->els_resp_pyld)
2816                 dma_free_coherent(&vha->hw->pdev->dev,
2817                                   els_plogi->rx_size,
2818                                   els_plogi->els_resp_pyld,
2819                                   els_plogi->els_resp_pyld_dma);
2820 }
2821
2822 static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
2823 {
2824         fc_port_t *fcport = sp->fcport;
2825         struct srb_iocb *lio = &sp->u.iocb_cmd;
2826         struct scsi_qla_host *vha = sp->vha;
2827         struct event_arg ea;
2828         struct qla_work_evt *e;
2829         struct fc_port *conflict_fcport;
2830         port_id_t cid;  /* conflict Nport id */
2831         const __le32 *fw_status = sp->u.iocb_cmd.u.els_plogi.fw_status;
2832         u16 lid;
2833
2834         ql_dbg(ql_dbg_disc, vha, 0x3072,
2835             "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
2836             sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
2837
2838         fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
2839         del_timer(&sp->u.iocb_cmd.timer);
2840
2841         if (sp->flags & SRB_WAKEUP_ON_COMP)
2842                 complete(&lio->u.els_plogi.comp);
2843         else {
2844                 switch (le32_to_cpu(fw_status[0])) {
2845                 case CS_DATA_UNDERRUN:
2846                 case CS_COMPLETE:
2847                         memset(&ea, 0, sizeof(ea));
2848                         ea.fcport = fcport;
2849                         ea.rc = res;
2850                         qla_handle_els_plogi_done(vha, &ea);
2851                         break;
2852
2853                 case CS_IOCB_ERROR:
2854                         switch (le32_to_cpu(fw_status[1])) {
2855                         case LSC_SCODE_PORTID_USED:
2856                                 lid = le32_to_cpu(fw_status[2]) & 0xffff;
2857                                 qlt_find_sess_invalidate_other(vha,
2858                                     wwn_to_u64(fcport->port_name),
2859                                     fcport->d_id, lid, &conflict_fcport);
2860                                 if (conflict_fcport) {
2861                                         /*
2862                                          * Another fcport shares the same
2863                                          * loop_id & nport id; conflict
2864                                          * fcport needs to finish cleanup
2865                                          * before this fcport can proceed
2866                                          * to login.
2867                                          */
2868                                         conflict_fcport->conflict = fcport;
2869                                         fcport->login_pause = 1;
2870                                         ql_dbg(ql_dbg_disc, vha, 0x20ed,
2871                                             "%s %d %8phC pid %06x inuse with lid %#x post gidpn\n",
2872                                             __func__, __LINE__,
2873                                             fcport->port_name,
2874                                             fcport->d_id.b24, lid);
2875                                 } else {
2876                                         ql_dbg(ql_dbg_disc, vha, 0x20ed,
2877                                             "%s %d %8phC pid %06x inuse with lid %#x sched del\n",
2878                                             __func__, __LINE__,
2879                                             fcport->port_name,
2880                                             fcport->d_id.b24, lid);
2881                                         qla2x00_clear_loop_id(fcport);
2882                                         set_bit(lid, vha->hw->loop_id_map);
2883                                         fcport->loop_id = lid;
2884                                         fcport->keep_nport_handle = 0;
2885                                         qlt_schedule_sess_for_deletion(fcport);
2886                                 }
2887                                 break;
2888
2889                         case LSC_SCODE_NPORT_USED:
2890                                 cid.b.domain = (le32_to_cpu(fw_status[2]) >> 16)
2891                                         & 0xff;
2892                                 cid.b.area   = (le32_to_cpu(fw_status[2]) >>  8)
2893                                         & 0xff;
2894                                 cid.b.al_pa  = le32_to_cpu(fw_status[2]) & 0xff;
2895                                 cid.b.rsvd_1 = 0;
2896
2897                                 ql_dbg(ql_dbg_disc, vha, 0x20ec,
2898                                     "%s %d %8phC lid %#x in use with pid %06x post gnl\n",
2899                                     __func__, __LINE__, fcport->port_name,
2900                                     fcport->loop_id, cid.b24);
2901                                 set_bit(fcport->loop_id,
2902                                     vha->hw->loop_id_map);
2903                                 fcport->loop_id = FC_NO_LOOP_ID;
2904                                 qla24xx_post_gnl_work(vha, fcport);
2905                                 break;
2906
2907                         case LSC_SCODE_NOXCB:
2908                                 vha->hw->exch_starvation++;
2909                                 if (vha->hw->exch_starvation > 5) {
2910                                         ql_log(ql_log_warn, vha, 0xd046,
2911                                             "Exchange starvation. Resetting RISC\n");
2912                                         vha->hw->exch_starvation = 0;
2913                                         set_bit(ISP_ABORT_NEEDED,
2914                                             &vha->dpc_flags);
2915                                         qla2xxx_wake_dpc(vha);
2916                                 }
2917                                 fallthrough;
2918                         default:
2919                                 ql_dbg(ql_dbg_disc, vha, 0x20eb,
2920                                     "%s %8phC cmd error fw_status 0x%x 0x%x 0x%x\n",
2921                                     __func__, sp->fcport->port_name,
2922                                     fw_status[0], fw_status[1], fw_status[2]);
2923
2924                                 fcport->flags &= ~FCF_ASYNC_SENT;
2925                                 qla2x00_set_fcport_disc_state(fcport,
2926                                     DSC_LOGIN_FAILED);
2927                                 set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2928                                 break;
2929                         }
2930                         break;
2931
2932                 default:
2933                         ql_dbg(ql_dbg_disc, vha, 0x20eb,
2934                             "%s %8phC cmd error 2 fw_status 0x%x 0x%x 0x%x\n",
2935                             __func__, sp->fcport->port_name,
2936                             fw_status[0], fw_status[1], fw_status[2]);
2937
2938                         sp->fcport->flags &= ~FCF_ASYNC_SENT;
2939                         qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_FAILED);
2940                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2941                         break;
2942                 }
2943
2944                 e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
2945                 if (!e) {
2946                         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2947
2948                         qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
2949                         sp->free(sp);
2950                         return;
2951                 }
2952                 e->u.iosb.sp = sp;
2953                 qla2x00_post_work(vha, e);
2954         }
2955 }
2956
2957 int
2958 qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
2959     fc_port_t *fcport, bool wait)
2960 {
2961         srb_t *sp;
2962         struct srb_iocb *elsio = NULL;
2963         struct qla_hw_data *ha = vha->hw;
2964         int rval = QLA_SUCCESS;
2965         void    *ptr, *resp_ptr;
2966
2967         /* Alloc SRB structure */
2968         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2969         if (!sp) {
2970                 ql_log(ql_log_info, vha, 0x70e6,
2971                  "SRB allocation failed\n");
2972                 fcport->flags &= ~FCF_ASYNC_ACTIVE;
2973                 return -ENOMEM;
2974         }
2975
2976         fcport->flags |= FCF_ASYNC_SENT;
2977         qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_PEND);
2978         elsio = &sp->u.iocb_cmd;
2979         ql_dbg(ql_dbg_io, vha, 0x3073,
2980             "Enter: PLOGI portid=%06x\n", fcport->d_id.b24);
2981
2982         sp->type = SRB_ELS_DCMD;
2983         sp->name = "ELS_DCMD";
2984         sp->fcport = fcport;
2985
2986         elsio->timeout = qla2x00_els_dcmd2_iocb_timeout;
2987         if (wait)
2988                 sp->flags = SRB_WAKEUP_ON_COMP;
2989
2990         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT + 2);
2991
2992         sp->done = qla2x00_els_dcmd2_sp_done;
2993         elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
2994
2995         ptr = elsio->u.els_plogi.els_plogi_pyld =
2996             dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.tx_size,
2997                 &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
2998
2999         if (!elsio->u.els_plogi.els_plogi_pyld) {
3000                 rval = QLA_FUNCTION_FAILED;
3001                 goto out;
3002         }
3003
3004         resp_ptr = elsio->u.els_plogi.els_resp_pyld =
3005             dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.rx_size,
3006                 &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
3007
3008         if (!elsio->u.els_plogi.els_resp_pyld) {
3009                 rval = QLA_FUNCTION_FAILED;
3010                 goto out;
3011         }
3012
3013         ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
3014
3015         memset(ptr, 0, sizeof(struct els_plogi_payload));
3016         memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
3017         memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
3018             &ha->plogi_els_payld.fl_csp, LOGIN_TEMPLATE_SIZE);
3019
3020         elsio->u.els_plogi.els_cmd = els_opcode;
3021         elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
3022
3023         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
3024         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
3025             (uint8_t *)elsio->u.els_plogi.els_plogi_pyld,
3026             sizeof(*elsio->u.els_plogi.els_plogi_pyld));
3027
3028         init_completion(&elsio->u.els_plogi.comp);
3029         rval = qla2x00_start_sp(sp);
3030         if (rval != QLA_SUCCESS) {
3031                 rval = QLA_FUNCTION_FAILED;
3032         } else {
3033                 ql_dbg(ql_dbg_disc, vha, 0x3074,
3034                     "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
3035                     sp->name, sp->handle, fcport->loop_id,
3036                     fcport->d_id.b24, vha->d_id.b24);
3037         }
3038
3039         if (wait) {
3040                 wait_for_completion(&elsio->u.els_plogi.comp);
3041
3042                 if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
3043                         rval = QLA_FUNCTION_FAILED;
3044         } else {
3045                 goto done;
3046         }
3047
3048 out:
3049         fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
3050         qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
3051         sp->free(sp);
3052 done:
3053         return rval;
3054 }
3055
3056 static void
3057 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
3058 {
3059         struct bsg_job *bsg_job = sp->u.bsg_job;
3060         struct fc_bsg_request *bsg_request = bsg_job->request;
3061
3062         els_iocb->entry_type = ELS_IOCB_TYPE;
3063         els_iocb->entry_count = 1;
3064         els_iocb->sys_define = 0;
3065         els_iocb->entry_status = 0;
3066         els_iocb->handle = sp->handle;
3067         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3068         els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3069         els_iocb->vp_index = sp->vha->vp_idx;
3070         els_iocb->sof_type = EST_SOFI3;
3071         els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3072
3073         els_iocb->opcode =
3074             sp->type == SRB_ELS_CMD_RPT ?
3075             bsg_request->rqst_data.r_els.els_code :
3076             bsg_request->rqst_data.h_els.command_code;
3077         els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
3078         els_iocb->d_id[1] = sp->fcport->d_id.b.area;
3079         els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
3080         els_iocb->control_flags = 0;
3081         els_iocb->rx_byte_count =
3082             cpu_to_le32(bsg_job->reply_payload.payload_len);
3083         els_iocb->tx_byte_count =
3084             cpu_to_le32(bsg_job->request_payload.payload_len);
3085
3086         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3087                            &els_iocb->tx_address);
3088         els_iocb->tx_len = cpu_to_le32(sg_dma_len
3089             (bsg_job->request_payload.sg_list));
3090
3091         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3092                            &els_iocb->rx_address);
3093         els_iocb->rx_len = cpu_to_le32(sg_dma_len
3094             (bsg_job->reply_payload.sg_list));
3095
3096         sp->vha->qla_stats.control_requests++;
3097 }
3098
3099 static void
3100 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
3101 {
3102         uint16_t        avail_dsds;
3103         struct dsd64    *cur_dsd;
3104         struct scatterlist *sg;
3105         int index;
3106         uint16_t tot_dsds;
3107         scsi_qla_host_t *vha = sp->vha;
3108         struct qla_hw_data *ha = vha->hw;
3109         struct bsg_job *bsg_job = sp->u.bsg_job;
3110         int entry_count = 1;
3111
3112         memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
3113         ct_iocb->entry_type = CT_IOCB_TYPE;
3114         ct_iocb->entry_status = 0;
3115         ct_iocb->handle1 = sp->handle;
3116         SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
3117         ct_iocb->status = cpu_to_le16(0);
3118         ct_iocb->control_flags = cpu_to_le16(0);
3119         ct_iocb->timeout = 0;
3120         ct_iocb->cmd_dsd_count =
3121             cpu_to_le16(bsg_job->request_payload.sg_cnt);
3122         ct_iocb->total_dsd_count =
3123             cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
3124         ct_iocb->req_bytecount =
3125             cpu_to_le32(bsg_job->request_payload.payload_len);
3126         ct_iocb->rsp_bytecount =
3127             cpu_to_le32(bsg_job->reply_payload.payload_len);
3128
3129         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3130                            &ct_iocb->req_dsd.address);
3131         ct_iocb->req_dsd.length = ct_iocb->req_bytecount;
3132
3133         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3134                            &ct_iocb->rsp_dsd.address);
3135         ct_iocb->rsp_dsd.length = ct_iocb->rsp_bytecount;
3136
3137         avail_dsds = 1;
3138         cur_dsd = &ct_iocb->rsp_dsd;
3139         index = 0;
3140         tot_dsds = bsg_job->reply_payload.sg_cnt;
3141
3142         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
3143                 cont_a64_entry_t *cont_pkt;
3144
3145                 /* Allocate additional continuation packets? */
3146                 if (avail_dsds == 0) {
3147                         /*
3148                         * Five DSDs are available in the Cont.
3149                         * Type 1 IOCB.
3150                                */
3151                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3152                             vha->hw->req_q_map[0]);
3153                         cur_dsd = cont_pkt->dsd;
3154                         avail_dsds = 5;
3155                         entry_count++;
3156                 }
3157
3158                 append_dsd64(&cur_dsd, sg);
3159                 avail_dsds--;
3160         }
3161         ct_iocb->entry_count = entry_count;
3162
3163         sp->vha->qla_stats.control_requests++;
3164 }
3165
3166 static void
3167 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
3168 {
3169         uint16_t        avail_dsds;
3170         struct dsd64    *cur_dsd;
3171         struct scatterlist *sg;
3172         int index;
3173         uint16_t cmd_dsds, rsp_dsds;
3174         scsi_qla_host_t *vha = sp->vha;
3175         struct qla_hw_data *ha = vha->hw;
3176         struct bsg_job *bsg_job = sp->u.bsg_job;
3177         int entry_count = 1;
3178         cont_a64_entry_t *cont_pkt = NULL;
3179
3180         ct_iocb->entry_type = CT_IOCB_TYPE;
3181         ct_iocb->entry_status = 0;
3182         ct_iocb->sys_define = 0;
3183         ct_iocb->handle = sp->handle;
3184
3185         ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3186         ct_iocb->vp_index = sp->vha->vp_idx;
3187         ct_iocb->comp_status = cpu_to_le16(0);
3188
3189         cmd_dsds = bsg_job->request_payload.sg_cnt;
3190         rsp_dsds = bsg_job->reply_payload.sg_cnt;
3191
3192         ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
3193         ct_iocb->timeout = 0;
3194         ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
3195         ct_iocb->cmd_byte_count =
3196             cpu_to_le32(bsg_job->request_payload.payload_len);
3197
3198         avail_dsds = 2;
3199         cur_dsd = ct_iocb->dsd;
3200         index = 0;
3201
3202         for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
3203                 /* Allocate additional continuation packets? */
3204                 if (avail_dsds == 0) {
3205                         /*
3206                          * Five DSDs are available in the Cont.
3207                          * Type 1 IOCB.
3208                          */
3209                         cont_pkt = qla2x00_prep_cont_type1_iocb(
3210                             vha, ha->req_q_map[0]);
3211                         cur_dsd = cont_pkt->dsd;
3212                         avail_dsds = 5;
3213                         entry_count++;
3214                 }
3215
3216                 append_dsd64(&cur_dsd, sg);
3217                 avail_dsds--;
3218         }
3219
3220         index = 0;
3221
3222         for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
3223                 /* Allocate additional continuation packets? */
3224                 if (avail_dsds == 0) {
3225                         /*
3226                         * Five DSDs are available in the Cont.
3227                         * Type 1 IOCB.
3228                                */
3229                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3230                             ha->req_q_map[0]);
3231                         cur_dsd = cont_pkt->dsd;
3232                         avail_dsds = 5;
3233                         entry_count++;
3234                 }
3235
3236                 append_dsd64(&cur_dsd, sg);
3237                 avail_dsds--;
3238         }
3239         ct_iocb->entry_count = entry_count;
3240 }
3241
3242 /*
3243  * qla82xx_start_scsi() - Send a SCSI command to the ISP
3244  * @sp: command to send to the ISP
3245  *
3246  * Returns non-zero if a failure occurred, else zero.
3247  */
3248 int
3249 qla82xx_start_scsi(srb_t *sp)
3250 {
3251         int             nseg;
3252         unsigned long   flags;
3253         struct scsi_cmnd *cmd;
3254         uint32_t        *clr_ptr;
3255         uint32_t        handle;
3256         uint16_t        cnt;
3257         uint16_t        req_cnt;
3258         uint16_t        tot_dsds;
3259         struct device_reg_82xx __iomem *reg;
3260         uint32_t dbval;
3261         __be32 *fcp_dl;
3262         uint8_t additional_cdb_len;
3263         struct ct6_dsd *ctx;
3264         struct scsi_qla_host *vha = sp->vha;
3265         struct qla_hw_data *ha = vha->hw;
3266         struct req_que *req = NULL;
3267         struct rsp_que *rsp = NULL;
3268
3269         /* Setup device pointers. */
3270         reg = &ha->iobase->isp82;
3271         cmd = GET_CMD_SP(sp);
3272         req = vha->req;
3273         rsp = ha->rsp_q_map[0];
3274
3275         /* So we know we haven't pci_map'ed anything yet */
3276         tot_dsds = 0;
3277
3278         dbval = 0x04 | (ha->portnum << 5);
3279
3280         /* Send marker if required */
3281         if (vha->marker_needed != 0) {
3282                 if (qla2x00_marker(vha, ha->base_qpair,
3283                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
3284                         ql_log(ql_log_warn, vha, 0x300c,
3285                             "qla2x00_marker failed for cmd=%p.\n", cmd);
3286                         return QLA_FUNCTION_FAILED;
3287                 }
3288                 vha->marker_needed = 0;
3289         }
3290
3291         /* Acquire ring specific lock */
3292         spin_lock_irqsave(&ha->hardware_lock, flags);
3293
3294         handle = qla2xxx_get_next_handle(req);
3295         if (handle == 0)
3296                 goto queuing_error;
3297
3298         /* Map the sg table so we have an accurate count of sg entries needed */
3299         if (scsi_sg_count(cmd)) {
3300                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
3301                     scsi_sg_count(cmd), cmd->sc_data_direction);
3302                 if (unlikely(!nseg))
3303                         goto queuing_error;
3304         } else
3305                 nseg = 0;
3306
3307         tot_dsds = nseg;
3308
3309         if (tot_dsds > ql2xshiftctondsd) {
3310                 struct cmd_type_6 *cmd_pkt;
3311                 uint16_t more_dsd_lists = 0;
3312                 struct dsd_dma *dsd_ptr;
3313                 uint16_t i;
3314
3315                 more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
3316                 if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
3317                         ql_dbg(ql_dbg_io, vha, 0x300d,
3318                             "Num of DSD list %d is than %d for cmd=%p.\n",
3319                             more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
3320                             cmd);
3321                         goto queuing_error;
3322                 }
3323
3324                 if (more_dsd_lists <= ha->gbl_dsd_avail)
3325                         goto sufficient_dsds;
3326                 else
3327                         more_dsd_lists -= ha->gbl_dsd_avail;
3328
3329                 for (i = 0; i < more_dsd_lists; i++) {
3330                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
3331                         if (!dsd_ptr) {
3332                                 ql_log(ql_log_fatal, vha, 0x300e,
3333                                     "Failed to allocate memory for dsd_dma "
3334                                     "for cmd=%p.\n", cmd);
3335                                 goto queuing_error;
3336                         }
3337
3338                         dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
3339                                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
3340                         if (!dsd_ptr->dsd_addr) {
3341                                 kfree(dsd_ptr);
3342                                 ql_log(ql_log_fatal, vha, 0x300f,
3343                                     "Failed to allocate memory for dsd_addr "
3344                                     "for cmd=%p.\n", cmd);
3345                                 goto queuing_error;
3346                         }
3347                         list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
3348                         ha->gbl_dsd_avail++;
3349                 }
3350
3351 sufficient_dsds:
3352                 req_cnt = 1;
3353
3354                 if (req->cnt < (req_cnt + 2)) {
3355                         cnt = (uint16_t)rd_reg_dword_relaxed(
3356                                 &reg->req_q_out[0]);
3357                         if (req->ring_index < cnt)
3358                                 req->cnt = cnt - req->ring_index;
3359                         else
3360                                 req->cnt = req->length -
3361                                         (req->ring_index - cnt);
3362                         if (req->cnt < (req_cnt + 2))
3363                                 goto queuing_error;
3364                 }
3365
3366                 ctx = sp->u.scmd.ct6_ctx =
3367                     mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
3368                 if (!ctx) {
3369                         ql_log(ql_log_fatal, vha, 0x3010,
3370                             "Failed to allocate ctx for cmd=%p.\n", cmd);
3371                         goto queuing_error;
3372                 }
3373
3374                 memset(ctx, 0, sizeof(struct ct6_dsd));
3375                 ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
3376                         GFP_ATOMIC, &ctx->fcp_cmnd_dma);
3377                 if (!ctx->fcp_cmnd) {
3378                         ql_log(ql_log_fatal, vha, 0x3011,
3379                             "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
3380                         goto queuing_error;
3381                 }
3382
3383                 /* Initialize the DSD list and dma handle */
3384                 INIT_LIST_HEAD(&ctx->dsd_list);
3385                 ctx->dsd_use_cnt = 0;
3386
3387                 if (cmd->cmd_len > 16) {
3388                         additional_cdb_len = cmd->cmd_len - 16;
3389                         if ((cmd->cmd_len % 4) != 0) {
3390                                 /* SCSI command bigger than 16 bytes must be
3391                                  * multiple of 4
3392                                  */
3393                                 ql_log(ql_log_warn, vha, 0x3012,
3394                                     "scsi cmd len %d not multiple of 4 "
3395                                     "for cmd=%p.\n", cmd->cmd_len, cmd);
3396                                 goto queuing_error_fcp_cmnd;
3397                         }
3398                         ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
3399                 } else {
3400                         additional_cdb_len = 0;
3401                         ctx->fcp_cmnd_len = 12 + 16 + 4;
3402                 }
3403
3404                 cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
3405                 cmd_pkt->handle = make_handle(req->id, handle);
3406
3407                 /* Zero out remaining portion of packet. */
3408                 /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
3409                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3410                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3411                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3412
3413                 /* Set NPORT-ID and LUN number*/
3414                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3415                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3416                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3417                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3418                 cmd_pkt->vp_index = sp->vha->vp_idx;
3419
3420                 /* Build IOCB segments */
3421                 if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
3422                         goto queuing_error_fcp_cmnd;
3423
3424                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3425                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
3426
3427                 /* build FCP_CMND IU */
3428                 int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
3429                 ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
3430
3431                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
3432                         ctx->fcp_cmnd->additional_cdb_len |= 1;
3433                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
3434                         ctx->fcp_cmnd->additional_cdb_len |= 2;
3435
3436                 /* Populate the FCP_PRIO. */
3437                 if (ha->flags.fcp_prio_enabled)
3438                         ctx->fcp_cmnd->task_attribute |=
3439                             sp->fcport->fcp_prio << 3;
3440
3441                 memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
3442
3443                 fcp_dl = (__be32 *)(ctx->fcp_cmnd->cdb + 16 +
3444                     additional_cdb_len);
3445                 *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
3446
3447                 cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
3448                 put_unaligned_le64(ctx->fcp_cmnd_dma,
3449                                    &cmd_pkt->fcp_cmnd_dseg_address);
3450
3451                 sp->flags |= SRB_FCP_CMND_DMA_VALID;
3452                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3453                 /* Set total data segment count. */
3454                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3455                 /* Specify response queue number where
3456                  * completion should happen
3457                  */
3458                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3459         } else {
3460                 struct cmd_type_7 *cmd_pkt;
3461
3462                 req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3463                 if (req->cnt < (req_cnt + 2)) {
3464                         cnt = (uint16_t)rd_reg_dword_relaxed(
3465                             &reg->req_q_out[0]);
3466                         if (req->ring_index < cnt)
3467                                 req->cnt = cnt - req->ring_index;
3468                         else
3469                                 req->cnt = req->length -
3470                                         (req->ring_index - cnt);
3471                 }
3472                 if (req->cnt < (req_cnt + 2))
3473                         goto queuing_error;
3474
3475                 cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
3476                 cmd_pkt->handle = make_handle(req->id, handle);
3477
3478                 /* Zero out remaining portion of packet. */
3479                 /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3480                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3481                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3482                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3483
3484                 /* Set NPORT-ID and LUN number*/
3485                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3486                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3487                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3488                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3489                 cmd_pkt->vp_index = sp->vha->vp_idx;
3490
3491                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3492                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
3493                     sizeof(cmd_pkt->lun));
3494
3495                 /* Populate the FCP_PRIO. */
3496                 if (ha->flags.fcp_prio_enabled)
3497                         cmd_pkt->task |= sp->fcport->fcp_prio << 3;
3498
3499                 /* Load SCSI command packet. */
3500                 memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
3501                 host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
3502
3503                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3504
3505                 /* Build IOCB segments */
3506                 qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
3507
3508                 /* Set total data segment count. */
3509                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3510                 /* Specify response queue number where
3511                  * completion should happen.
3512                  */
3513                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3514
3515         }
3516         /* Build command packet. */
3517         req->current_outstanding_cmd = handle;
3518         req->outstanding_cmds[handle] = sp;
3519         sp->handle = handle;
3520         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
3521         req->cnt -= req_cnt;
3522         wmb();
3523
3524         /* Adjust ring index. */
3525         req->ring_index++;
3526         if (req->ring_index == req->length) {
3527                 req->ring_index = 0;
3528                 req->ring_ptr = req->ring;
3529         } else
3530                 req->ring_ptr++;
3531
3532         sp->flags |= SRB_DMA_VALID;
3533
3534         /* Set chip new ring index. */
3535         /* write, read and verify logic */
3536         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
3537         if (ql2xdbwr)
3538                 qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
3539         else {
3540                 wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3541                 wmb();
3542                 while (rd_reg_dword(ha->nxdb_rd_ptr) != dbval) {
3543                         wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3544                         wmb();
3545                 }
3546         }
3547
3548         /* Manage unprocessed RIO/ZIO commands in response queue. */
3549         if (vha->flags.process_response_queue &&
3550             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
3551                 qla24xx_process_response_queue(vha, rsp);
3552
3553         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3554         return QLA_SUCCESS;
3555
3556 queuing_error_fcp_cmnd:
3557         dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
3558 queuing_error:
3559         if (tot_dsds)
3560                 scsi_dma_unmap(cmd);
3561
3562         if (sp->u.scmd.crc_ctx) {
3563                 mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
3564                 sp->u.scmd.crc_ctx = NULL;
3565         }
3566         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3567
3568         return QLA_FUNCTION_FAILED;
3569 }
3570
3571 static void
3572 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
3573 {
3574         struct srb_iocb *aio = &sp->u.iocb_cmd;
3575         scsi_qla_host_t *vha = sp->vha;
3576         struct req_que *req = sp->qpair->req;
3577         srb_t *orig_sp = sp->cmd_sp;
3578
3579         memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
3580         abt_iocb->entry_type = ABORT_IOCB_TYPE;
3581         abt_iocb->entry_count = 1;
3582         abt_iocb->handle = make_handle(req->id, sp->handle);
3583         if (sp->fcport) {
3584                 abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3585                 abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
3586                 abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
3587                 abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
3588         }
3589         abt_iocb->handle_to_abort =
3590                 make_handle(le16_to_cpu(aio->u.abt.req_que_no),
3591                             aio->u.abt.cmd_hndl);
3592         abt_iocb->vp_index = vha->vp_idx;
3593         abt_iocb->req_que_no = aio->u.abt.req_que_no;
3594
3595         /* need to pass original sp */
3596         if (orig_sp)
3597                 qla_nvme_abort_set_option(abt_iocb, orig_sp);
3598
3599         /* Send the command to the firmware */
3600         wmb();
3601 }
3602
3603 static void
3604 qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
3605 {
3606         int i, sz;
3607
3608         mbx->entry_type = MBX_IOCB_TYPE;
3609         mbx->handle = sp->handle;
3610         sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
3611
3612         for (i = 0; i < sz; i++)
3613                 mbx->mb[i] = sp->u.iocb_cmd.u.mbx.out_mb[i];
3614 }
3615
3616 static void
3617 qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
3618 {
3619         sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
3620         qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
3621         ct_pkt->handle = sp->handle;
3622 }
3623
3624 static void qla2x00_send_notify_ack_iocb(srb_t *sp,
3625         struct nack_to_isp *nack)
3626 {
3627         struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
3628
3629         nack->entry_type = NOTIFY_ACK_TYPE;
3630         nack->entry_count = 1;
3631         nack->ox_id = ntfy->ox_id;
3632
3633         nack->u.isp24.handle = sp->handle;
3634         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3635         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3636                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3637                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3638         }
3639         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3640         nack->u.isp24.status = ntfy->u.isp24.status;
3641         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3642         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3643         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3644         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3645         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3646         nack->u.isp24.srr_flags = 0;
3647         nack->u.isp24.srr_reject_code = 0;
3648         nack->u.isp24.srr_reject_code_expl = 0;
3649         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3650 }
3651
3652 /*
3653  * Build NVME LS request
3654  */
3655 static void
3656 qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
3657 {
3658         struct srb_iocb *nvme;
3659
3660         nvme = &sp->u.iocb_cmd;
3661         cmd_pkt->entry_type = PT_LS4_REQUEST;
3662         cmd_pkt->entry_count = 1;
3663         cmd_pkt->control_flags = cpu_to_le16(CF_LS4_ORIGINATOR << CF_LS4_SHIFT);
3664
3665         cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
3666         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3667         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
3668
3669         cmd_pkt->tx_dseg_count = cpu_to_le16(1);
3670         cmd_pkt->tx_byte_count = cpu_to_le32(nvme->u.nvme.cmd_len);
3671         cmd_pkt->dsd[0].length = cpu_to_le32(nvme->u.nvme.cmd_len);
3672         put_unaligned_le64(nvme->u.nvme.cmd_dma, &cmd_pkt->dsd[0].address);
3673
3674         cmd_pkt->rx_dseg_count = cpu_to_le16(1);
3675         cmd_pkt->rx_byte_count = cpu_to_le32(nvme->u.nvme.rsp_len);
3676         cmd_pkt->dsd[1].length = cpu_to_le32(nvme->u.nvme.rsp_len);
3677         put_unaligned_le64(nvme->u.nvme.rsp_dma, &cmd_pkt->dsd[1].address);
3678 }
3679
3680 static void
3681 qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
3682 {
3683         int map, pos;
3684
3685         vce->entry_type = VP_CTRL_IOCB_TYPE;
3686         vce->handle = sp->handle;
3687         vce->entry_count = 1;
3688         vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
3689         vce->vp_count = cpu_to_le16(1);
3690
3691         /*
3692          * index map in firmware starts with 1; decrement index
3693          * this is ok as we never use index 0
3694          */
3695         map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
3696         pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
3697         vce->vp_idx_map[map] |= 1 << pos;
3698 }
3699
3700 static void
3701 qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
3702 {
3703         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
3704         logio->control_flags =
3705             cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
3706
3707         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3708         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
3709         logio->port_id[1] = sp->fcport->d_id.b.area;
3710         logio->port_id[2] = sp->fcport->d_id.b.domain;
3711         logio->vp_index = sp->fcport->vha->vp_idx;
3712 }
3713
3714 int
3715 qla2x00_start_sp(srb_t *sp)
3716 {
3717         int rval = QLA_SUCCESS;
3718         scsi_qla_host_t *vha = sp->vha;
3719         struct qla_hw_data *ha = vha->hw;
3720         struct qla_qpair *qp = sp->qpair;
3721         void *pkt;
3722         unsigned long flags;
3723
3724         if (vha->hw->flags.eeh_busy)
3725                 return -EIO;
3726
3727         spin_lock_irqsave(qp->qp_lock_ptr, flags);
3728         pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
3729         if (!pkt) {
3730                 rval = EAGAIN;
3731                 ql_log(ql_log_warn, vha, 0x700c,
3732                     "qla2x00_alloc_iocbs failed.\n");
3733                 goto done;
3734         }
3735
3736         switch (sp->type) {
3737         case SRB_LOGIN_CMD:
3738                 IS_FWI2_CAPABLE(ha) ?
3739                     qla24xx_login_iocb(sp, pkt) :
3740                     qla2x00_login_iocb(sp, pkt);
3741                 break;
3742         case SRB_PRLI_CMD:
3743                 qla24xx_prli_iocb(sp, pkt);
3744                 break;
3745         case SRB_LOGOUT_CMD:
3746                 IS_FWI2_CAPABLE(ha) ?
3747                     qla24xx_logout_iocb(sp, pkt) :
3748                     qla2x00_logout_iocb(sp, pkt);
3749                 break;
3750         case SRB_ELS_CMD_RPT:
3751         case SRB_ELS_CMD_HST:
3752                 qla24xx_els_iocb(sp, pkt);
3753                 break;
3754         case SRB_CT_CMD:
3755                 IS_FWI2_CAPABLE(ha) ?
3756                     qla24xx_ct_iocb(sp, pkt) :
3757                     qla2x00_ct_iocb(sp, pkt);
3758                 break;
3759         case SRB_ADISC_CMD:
3760                 IS_FWI2_CAPABLE(ha) ?
3761                     qla24xx_adisc_iocb(sp, pkt) :
3762                     qla2x00_adisc_iocb(sp, pkt);
3763                 break;
3764         case SRB_TM_CMD:
3765                 IS_QLAFX00(ha) ?
3766                     qlafx00_tm_iocb(sp, pkt) :
3767                     qla24xx_tm_iocb(sp, pkt);
3768                 break;
3769         case SRB_FXIOCB_DCMD:
3770         case SRB_FXIOCB_BCMD:
3771                 qlafx00_fxdisc_iocb(sp, pkt);
3772                 break;
3773         case SRB_NVME_LS:
3774                 qla_nvme_ls(sp, pkt);
3775                 break;
3776         case SRB_ABT_CMD:
3777                 IS_QLAFX00(ha) ?
3778                         qlafx00_abort_iocb(sp, pkt) :
3779                         qla24xx_abort_iocb(sp, pkt);
3780                 break;
3781         case SRB_ELS_DCMD:
3782                 qla24xx_els_logo_iocb(sp, pkt);
3783                 break;
3784         case SRB_CT_PTHRU_CMD:
3785                 qla2x00_ctpthru_cmd_iocb(sp, pkt);
3786                 break;
3787         case SRB_MB_IOCB:
3788                 qla2x00_mb_iocb(sp, pkt);
3789                 break;
3790         case SRB_NACK_PLOGI:
3791         case SRB_NACK_PRLI:
3792         case SRB_NACK_LOGO:
3793                 qla2x00_send_notify_ack_iocb(sp, pkt);
3794                 break;
3795         case SRB_CTRL_VP:
3796                 qla25xx_ctrlvp_iocb(sp, pkt);
3797                 break;
3798         case SRB_PRLO_CMD:
3799                 qla24xx_prlo_iocb(sp, pkt);
3800                 break;
3801         default:
3802                 break;
3803         }
3804
3805         if (sp->start_timer)
3806                 add_timer(&sp->u.iocb_cmd.timer);
3807
3808         wmb();
3809         qla2x00_start_iocbs(vha, qp->req);
3810 done:
3811         spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
3812         return rval;
3813 }
3814
3815 static void
3816 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
3817                                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
3818 {
3819         uint16_t avail_dsds;
3820         struct dsd64 *cur_dsd;
3821         uint32_t req_data_len = 0;
3822         uint32_t rsp_data_len = 0;
3823         struct scatterlist *sg;
3824         int index;
3825         int entry_count = 1;
3826         struct bsg_job *bsg_job = sp->u.bsg_job;
3827
3828         /*Update entry type to indicate bidir command */
3829         put_unaligned_le32(COMMAND_BIDIRECTIONAL, &cmd_pkt->entry_type);
3830
3831         /* Set the transfer direction, in this set both flags
3832          * Also set the BD_WRAP_BACK flag, firmware will take care
3833          * assigning DID=SID for outgoing pkts.
3834          */
3835         cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3836         cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3837         cmd_pkt->control_flags = cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
3838                                                         BD_WRAP_BACK);
3839
3840         req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
3841         cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
3842         cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
3843         cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
3844
3845         vha->bidi_stats.transfer_bytes += req_data_len;
3846         vha->bidi_stats.io_count++;
3847
3848         vha->qla_stats.output_bytes += req_data_len;
3849         vha->qla_stats.output_requests++;
3850
3851         /* Only one dsd is available for bidirectional IOCB, remaining dsds
3852          * are bundled in continuation iocb
3853          */
3854         avail_dsds = 1;
3855         cur_dsd = &cmd_pkt->fcp_dsd;
3856
3857         index = 0;
3858
3859         for_each_sg(bsg_job->request_payload.sg_list, sg,
3860                                 bsg_job->request_payload.sg_cnt, index) {
3861                 cont_a64_entry_t *cont_pkt;
3862
3863                 /* Allocate additional continuation packets */
3864                 if (avail_dsds == 0) {
3865                         /* Continuation type 1 IOCB can accomodate
3866                          * 5 DSDS
3867                          */
3868                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3869                         cur_dsd = cont_pkt->dsd;
3870                         avail_dsds = 5;
3871                         entry_count++;
3872                 }
3873                 append_dsd64(&cur_dsd, sg);
3874                 avail_dsds--;
3875         }
3876         /* For read request DSD will always goes to continuation IOCB
3877          * and follow the write DSD. If there is room on the current IOCB
3878          * then it is added to that IOCB else new continuation IOCB is
3879          * allocated.
3880          */
3881         for_each_sg(bsg_job->reply_payload.sg_list, sg,
3882                                 bsg_job->reply_payload.sg_cnt, index) {
3883                 cont_a64_entry_t *cont_pkt;
3884
3885                 /* Allocate additional continuation packets */
3886                 if (avail_dsds == 0) {
3887                         /* Continuation type 1 IOCB can accomodate
3888                          * 5 DSDS
3889                          */
3890                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3891                         cur_dsd = cont_pkt->dsd;
3892                         avail_dsds = 5;
3893                         entry_count++;
3894                 }
3895                 append_dsd64(&cur_dsd, sg);
3896                 avail_dsds--;
3897         }
3898         /* This value should be same as number of IOCB required for this cmd */
3899         cmd_pkt->entry_count = entry_count;
3900 }
3901
3902 int
3903 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
3904 {
3905
3906         struct qla_hw_data *ha = vha->hw;
3907         unsigned long flags;
3908         uint32_t handle;
3909         uint16_t req_cnt;
3910         uint16_t cnt;
3911         uint32_t *clr_ptr;
3912         struct cmd_bidir *cmd_pkt = NULL;
3913         struct rsp_que *rsp;
3914         struct req_que *req;
3915         int rval = EXT_STATUS_OK;
3916
3917         rval = QLA_SUCCESS;
3918
3919         rsp = ha->rsp_q_map[0];
3920         req = vha->req;
3921
3922         /* Send marker if required */
3923         if (vha->marker_needed != 0) {
3924                 if (qla2x00_marker(vha, ha->base_qpair,
3925                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
3926                         return EXT_STATUS_MAILBOX;
3927                 vha->marker_needed = 0;
3928         }
3929
3930         /* Acquire ring specific lock */
3931         spin_lock_irqsave(&ha->hardware_lock, flags);
3932
3933         handle = qla2xxx_get_next_handle(req);
3934         if (handle == 0) {
3935                 rval = EXT_STATUS_BUSY;
3936                 goto queuing_error;
3937         }
3938
3939         /* Calculate number of IOCB required */
3940         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3941
3942         /* Check for room on request queue. */
3943         if (req->cnt < req_cnt + 2) {
3944                 if (IS_SHADOW_REG_CAPABLE(ha)) {
3945                         cnt = *req->out_ptr;
3946                 } else {
3947                         cnt = rd_reg_dword_relaxed(req->req_q_out);
3948                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
3949                                 goto queuing_error;
3950                 }
3951
3952                 if  (req->ring_index < cnt)
3953                         req->cnt = cnt - req->ring_index;
3954                 else
3955                         req->cnt = req->length -
3956                                 (req->ring_index - cnt);
3957         }
3958         if (req->cnt < req_cnt + 2) {
3959                 rval = EXT_STATUS_BUSY;
3960                 goto queuing_error;
3961         }
3962
3963         cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
3964         cmd_pkt->handle = make_handle(req->id, handle);
3965
3966         /* Zero out remaining portion of packet. */
3967         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3968         clr_ptr = (uint32_t *)cmd_pkt + 2;
3969         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3970
3971         /* Set NPORT-ID  (of vha)*/
3972         cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
3973         cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
3974         cmd_pkt->port_id[1] = vha->d_id.b.area;
3975         cmd_pkt->port_id[2] = vha->d_id.b.domain;
3976
3977         qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
3978         cmd_pkt->entry_status = (uint8_t) rsp->id;
3979         /* Build command packet. */
3980         req->current_outstanding_cmd = handle;
3981         req->outstanding_cmds[handle] = sp;
3982         sp->handle = handle;
3983         req->cnt -= req_cnt;
3984
3985         /* Send the command to the firmware */
3986         wmb();
3987         qla2x00_start_iocbs(vha, req);
3988 queuing_error:
3989         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3990
3991         return rval;
3992 }