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 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         if (sp->fcport->edif.enable  && (sp->fcport->flags & FCF_FCSP_DEVICE))
1556                 return qla28xx_start_scsi_edif(sp);
1557
1558         /* Setup device pointers. */
1559         req = vha->req;
1560         rsp = req->rsp;
1561
1562         /* So we know we haven't pci_map'ed anything yet */
1563         tot_dsds = 0;
1564
1565         /* Send marker if required */
1566         if (vha->marker_needed != 0) {
1567                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1568                     QLA_SUCCESS)
1569                         return QLA_FUNCTION_FAILED;
1570                 vha->marker_needed = 0;
1571         }
1572
1573         /* Acquire ring specific lock */
1574         spin_lock_irqsave(&ha->hardware_lock, flags);
1575
1576         handle = qla2xxx_get_next_handle(req);
1577         if (handle == 0)
1578                 goto queuing_error;
1579
1580         /* Map the sg table so we have an accurate count of sg entries needed */
1581         if (scsi_sg_count(cmd)) {
1582                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1583                     scsi_sg_count(cmd), cmd->sc_data_direction);
1584                 if (unlikely(!nseg))
1585                         goto queuing_error;
1586         } else
1587                 nseg = 0;
1588
1589         tot_dsds = nseg;
1590         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1591
1592         sp->iores.res_type = RESOURCE_INI;
1593         sp->iores.iocb_cnt = req_cnt;
1594         if (qla_get_iocbs(sp->qpair, &sp->iores))
1595                 goto queuing_error;
1596
1597         if (req->cnt < (req_cnt + 2)) {
1598                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1599                         cnt = *req->out_ptr;
1600                 } else {
1601                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1602                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1603                                 goto queuing_error;
1604                 }
1605
1606                 if (req->ring_index < cnt)
1607                         req->cnt = cnt - req->ring_index;
1608                 else
1609                         req->cnt = req->length -
1610                                 (req->ring_index - cnt);
1611                 if (req->cnt < (req_cnt + 2))
1612                         goto queuing_error;
1613         }
1614
1615         /* Build command packet. */
1616         req->current_outstanding_cmd = handle;
1617         req->outstanding_cmds[handle] = sp;
1618         sp->handle = handle;
1619         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1620         req->cnt -= req_cnt;
1621
1622         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1623         cmd_pkt->handle = make_handle(req->id, handle);
1624
1625         /* Zero out remaining portion of packet. */
1626         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1627         clr_ptr = (uint32_t *)cmd_pkt + 2;
1628         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1629         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1630
1631         /* Set NPORT-ID and LUN number*/
1632         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1633         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1634         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1635         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1636         cmd_pkt->vp_index = sp->vha->vp_idx;
1637
1638         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1639         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1640
1641         cmd_pkt->task = TSK_SIMPLE;
1642
1643         /* Load SCSI command packet. */
1644         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1645         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1646
1647         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1648
1649         /* Build IOCB segments */
1650         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
1651
1652         /* Set total data segment count. */
1653         cmd_pkt->entry_count = (uint8_t)req_cnt;
1654         wmb();
1655         /* Adjust ring index. */
1656         req->ring_index++;
1657         if (req->ring_index == req->length) {
1658                 req->ring_index = 0;
1659                 req->ring_ptr = req->ring;
1660         } else
1661                 req->ring_ptr++;
1662
1663         sp->qpair->cmd_cnt++;
1664         sp->flags |= SRB_DMA_VALID;
1665
1666         /* Set chip new ring index. */
1667         wrt_reg_dword(req->req_q_in, req->ring_index);
1668
1669         /* Manage unprocessed RIO/ZIO commands in response queue. */
1670         if (vha->flags.process_response_queue &&
1671             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1672                 qla24xx_process_response_queue(vha, rsp);
1673
1674         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1675         return QLA_SUCCESS;
1676
1677 queuing_error:
1678         if (tot_dsds)
1679                 scsi_dma_unmap(cmd);
1680
1681         qla_put_iocbs(sp->qpair, &sp->iores);
1682         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1683
1684         return QLA_FUNCTION_FAILED;
1685 }
1686
1687 /**
1688  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1689  * @sp: command to send to the ISP
1690  *
1691  * Returns non-zero if a failure occurred, else zero.
1692  */
1693 int
1694 qla24xx_dif_start_scsi(srb_t *sp)
1695 {
1696         int                     nseg;
1697         unsigned long           flags;
1698         uint32_t                *clr_ptr;
1699         uint32_t                handle;
1700         uint16_t                cnt;
1701         uint16_t                req_cnt = 0;
1702         uint16_t                tot_dsds;
1703         uint16_t                tot_prot_dsds;
1704         uint16_t                fw_prot_opts = 0;
1705         struct req_que          *req = NULL;
1706         struct rsp_que          *rsp = NULL;
1707         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1708         struct scsi_qla_host    *vha = sp->vha;
1709         struct qla_hw_data      *ha = vha->hw;
1710         struct cmd_type_crc_2   *cmd_pkt;
1711         uint32_t                status = 0;
1712
1713 #define QDSS_GOT_Q_SPACE        BIT_0
1714
1715         /* Only process protection or >16 cdb in this routine */
1716         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1717                 if (cmd->cmd_len <= 16)
1718                         return qla24xx_start_scsi(sp);
1719         }
1720
1721         /* Setup device pointers. */
1722         req = vha->req;
1723         rsp = req->rsp;
1724
1725         /* So we know we haven't pci_map'ed anything yet */
1726         tot_dsds = 0;
1727
1728         /* Send marker if required */
1729         if (vha->marker_needed != 0) {
1730                 if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1731                     QLA_SUCCESS)
1732                         return QLA_FUNCTION_FAILED;
1733                 vha->marker_needed = 0;
1734         }
1735
1736         /* Acquire ring specific lock */
1737         spin_lock_irqsave(&ha->hardware_lock, flags);
1738
1739         handle = qla2xxx_get_next_handle(req);
1740         if (handle == 0)
1741                 goto queuing_error;
1742
1743         /* Compute number of required data segments */
1744         /* Map the sg table so we have an accurate count of sg entries needed */
1745         if (scsi_sg_count(cmd)) {
1746                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1747                     scsi_sg_count(cmd), cmd->sc_data_direction);
1748                 if (unlikely(!nseg))
1749                         goto queuing_error;
1750                 else
1751                         sp->flags |= SRB_DMA_VALID;
1752
1753                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1754                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1755                         struct qla2_sgx sgx;
1756                         uint32_t        partial;
1757
1758                         memset(&sgx, 0, sizeof(struct qla2_sgx));
1759                         sgx.tot_bytes = scsi_bufflen(cmd);
1760                         sgx.cur_sg = scsi_sglist(cmd);
1761                         sgx.sp = sp;
1762
1763                         nseg = 0;
1764                         while (qla24xx_get_one_block_sg(
1765                             cmd->device->sector_size, &sgx, &partial))
1766                                 nseg++;
1767                 }
1768         } else
1769                 nseg = 0;
1770
1771         /* number of required data segments */
1772         tot_dsds = nseg;
1773
1774         /* Compute number of required protection segments */
1775         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1776                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1777                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1778                 if (unlikely(!nseg))
1779                         goto queuing_error;
1780                 else
1781                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
1782
1783                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1784                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1785                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1786                 }
1787         } else {
1788                 nseg = 0;
1789         }
1790
1791         req_cnt = 1;
1792         /* Total Data and protection sg segment(s) */
1793         tot_prot_dsds = nseg;
1794         tot_dsds += nseg;
1795
1796         sp->iores.res_type = RESOURCE_INI;
1797         sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1798         if (qla_get_iocbs(sp->qpair, &sp->iores))
1799                 goto queuing_error;
1800
1801         if (req->cnt < (req_cnt + 2)) {
1802                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1803                         cnt = *req->out_ptr;
1804                 } else {
1805                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1806                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1807                                 goto queuing_error;
1808                 }
1809                 if (req->ring_index < cnt)
1810                         req->cnt = cnt - req->ring_index;
1811                 else
1812                         req->cnt = req->length -
1813                                 (req->ring_index - cnt);
1814                 if (req->cnt < (req_cnt + 2))
1815                         goto queuing_error;
1816         }
1817
1818         status |= QDSS_GOT_Q_SPACE;
1819
1820         /* Build header part of command packet (excluding the OPCODE). */
1821         req->current_outstanding_cmd = handle;
1822         req->outstanding_cmds[handle] = sp;
1823         sp->handle = handle;
1824         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1825         req->cnt -= req_cnt;
1826
1827         /* Fill-in common area */
1828         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1829         cmd_pkt->handle = make_handle(req->id, handle);
1830
1831         clr_ptr = (uint32_t *)cmd_pkt + 2;
1832         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1833
1834         /* Set NPORT-ID and LUN number*/
1835         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1836         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1837         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1838         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1839
1840         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1841         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1842
1843         /* Total Data and protection segment(s) */
1844         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1845
1846         /* Build IOCB segments and adjust for data protection segments */
1847         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1848             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1849                 QLA_SUCCESS)
1850                 goto queuing_error;
1851
1852         cmd_pkt->entry_count = (uint8_t)req_cnt;
1853         /* Specify response queue number where completion should happen */
1854         cmd_pkt->entry_status = (uint8_t) rsp->id;
1855         cmd_pkt->timeout = cpu_to_le16(0);
1856         wmb();
1857
1858         /* Adjust ring index. */
1859         req->ring_index++;
1860         if (req->ring_index == req->length) {
1861                 req->ring_index = 0;
1862                 req->ring_ptr = req->ring;
1863         } else
1864                 req->ring_ptr++;
1865
1866         sp->qpair->cmd_cnt++;
1867         /* Set chip new ring index. */
1868         wrt_reg_dword(req->req_q_in, req->ring_index);
1869
1870         /* Manage unprocessed RIO/ZIO commands in response queue. */
1871         if (vha->flags.process_response_queue &&
1872             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1873                 qla24xx_process_response_queue(vha, rsp);
1874
1875         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1876
1877         return QLA_SUCCESS;
1878
1879 queuing_error:
1880         if (status & QDSS_GOT_Q_SPACE) {
1881                 req->outstanding_cmds[handle] = NULL;
1882                 req->cnt += req_cnt;
1883         }
1884         /* Cleanup will be performed by the caller (queuecommand) */
1885
1886         qla_put_iocbs(sp->qpair, &sp->iores);
1887         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1888
1889         return QLA_FUNCTION_FAILED;
1890 }
1891
1892 /**
1893  * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
1894  * @sp: command to send to the ISP
1895  *
1896  * Returns non-zero if a failure occurred, else zero.
1897  */
1898 static int
1899 qla2xxx_start_scsi_mq(srb_t *sp)
1900 {
1901         int             nseg;
1902         unsigned long   flags;
1903         uint32_t        *clr_ptr;
1904         uint32_t        handle;
1905         struct cmd_type_7 *cmd_pkt;
1906         uint16_t        cnt;
1907         uint16_t        req_cnt;
1908         uint16_t        tot_dsds;
1909         struct req_que *req = NULL;
1910         struct rsp_que *rsp;
1911         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1912         struct scsi_qla_host *vha = sp->fcport->vha;
1913         struct qla_hw_data *ha = vha->hw;
1914         struct qla_qpair *qpair = sp->qpair;
1915
1916         if (sp->fcport->edif.enable && (sp->fcport->flags & FCF_FCSP_DEVICE))
1917                 return qla28xx_start_scsi_edif(sp);
1918
1919         /* Acquire qpair specific lock */
1920         spin_lock_irqsave(&qpair->qp_lock, flags);
1921
1922         /* Setup qpair pointers */
1923         req = qpair->req;
1924         rsp = qpair->rsp;
1925
1926         /* So we know we haven't pci_map'ed anything yet */
1927         tot_dsds = 0;
1928
1929         /* Send marker if required */
1930         if (vha->marker_needed != 0) {
1931                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
1932                     QLA_SUCCESS) {
1933                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
1934                         return QLA_FUNCTION_FAILED;
1935                 }
1936                 vha->marker_needed = 0;
1937         }
1938
1939         handle = qla2xxx_get_next_handle(req);
1940         if (handle == 0)
1941                 goto queuing_error;
1942
1943         /* Map the sg table so we have an accurate count of sg entries needed */
1944         if (scsi_sg_count(cmd)) {
1945                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1946                     scsi_sg_count(cmd), cmd->sc_data_direction);
1947                 if (unlikely(!nseg))
1948                         goto queuing_error;
1949         } else
1950                 nseg = 0;
1951
1952         tot_dsds = nseg;
1953         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1954
1955         sp->iores.res_type = RESOURCE_INI;
1956         sp->iores.iocb_cnt = req_cnt;
1957         if (qla_get_iocbs(sp->qpair, &sp->iores))
1958                 goto queuing_error;
1959
1960         if (req->cnt < (req_cnt + 2)) {
1961                 if (IS_SHADOW_REG_CAPABLE(ha)) {
1962                         cnt = *req->out_ptr;
1963                 } else {
1964                         cnt = rd_reg_dword_relaxed(req->req_q_out);
1965                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1966                                 goto queuing_error;
1967                 }
1968
1969                 if (req->ring_index < cnt)
1970                         req->cnt = cnt - req->ring_index;
1971                 else
1972                         req->cnt = req->length -
1973                                 (req->ring_index - cnt);
1974                 if (req->cnt < (req_cnt + 2))
1975                         goto queuing_error;
1976         }
1977
1978         /* Build command packet. */
1979         req->current_outstanding_cmd = handle;
1980         req->outstanding_cmds[handle] = sp;
1981         sp->handle = handle;
1982         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1983         req->cnt -= req_cnt;
1984
1985         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1986         cmd_pkt->handle = make_handle(req->id, handle);
1987
1988         /* Zero out remaining portion of packet. */
1989         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1990         clr_ptr = (uint32_t *)cmd_pkt + 2;
1991         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1992         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1993
1994         /* Set NPORT-ID and LUN number*/
1995         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1996         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1997         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1998         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1999         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2000
2001         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2002         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2003
2004         cmd_pkt->task = TSK_SIMPLE;
2005
2006         /* Load SCSI command packet. */
2007         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2008         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2009
2010         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2011
2012         /* Build IOCB segments */
2013         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
2014
2015         /* Set total data segment count. */
2016         cmd_pkt->entry_count = (uint8_t)req_cnt;
2017         wmb();
2018         /* Adjust ring index. */
2019         req->ring_index++;
2020         if (req->ring_index == req->length) {
2021                 req->ring_index = 0;
2022                 req->ring_ptr = req->ring;
2023         } else
2024                 req->ring_ptr++;
2025
2026         sp->qpair->cmd_cnt++;
2027         sp->flags |= SRB_DMA_VALID;
2028
2029         /* Set chip new ring index. */
2030         wrt_reg_dword(req->req_q_in, req->ring_index);
2031
2032         /* Manage unprocessed RIO/ZIO commands in response queue. */
2033         if (vha->flags.process_response_queue &&
2034             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2035                 qla24xx_process_response_queue(vha, rsp);
2036
2037         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2038         return QLA_SUCCESS;
2039
2040 queuing_error:
2041         if (tot_dsds)
2042                 scsi_dma_unmap(cmd);
2043
2044         qla_put_iocbs(sp->qpair, &sp->iores);
2045         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2046
2047         return QLA_FUNCTION_FAILED;
2048 }
2049
2050
2051 /**
2052  * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
2053  * @sp: command to send to the ISP
2054  *
2055  * Returns non-zero if a failure occurred, else zero.
2056  */
2057 int
2058 qla2xxx_dif_start_scsi_mq(srb_t *sp)
2059 {
2060         int                     nseg;
2061         unsigned long           flags;
2062         uint32_t                *clr_ptr;
2063         uint32_t                handle;
2064         uint16_t                cnt;
2065         uint16_t                req_cnt = 0;
2066         uint16_t                tot_dsds;
2067         uint16_t                tot_prot_dsds;
2068         uint16_t                fw_prot_opts = 0;
2069         struct req_que          *req = NULL;
2070         struct rsp_que          *rsp = NULL;
2071         struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
2072         struct scsi_qla_host    *vha = sp->fcport->vha;
2073         struct qla_hw_data      *ha = vha->hw;
2074         struct cmd_type_crc_2   *cmd_pkt;
2075         uint32_t                status = 0;
2076         struct qla_qpair        *qpair = sp->qpair;
2077
2078 #define QDSS_GOT_Q_SPACE        BIT_0
2079
2080         /* Check for host side state */
2081         if (!qpair->online) {
2082                 cmd->result = DID_NO_CONNECT << 16;
2083                 return QLA_INTERFACE_ERROR;
2084         }
2085
2086         if (!qpair->difdix_supported &&
2087                 scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2088                 cmd->result = DID_NO_CONNECT << 16;
2089                 return QLA_INTERFACE_ERROR;
2090         }
2091
2092         /* Only process protection or >16 cdb in this routine */
2093         if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
2094                 if (cmd->cmd_len <= 16)
2095                         return qla2xxx_start_scsi_mq(sp);
2096         }
2097
2098         spin_lock_irqsave(&qpair->qp_lock, flags);
2099
2100         /* Setup qpair pointers */
2101         rsp = qpair->rsp;
2102         req = qpair->req;
2103
2104         /* So we know we haven't pci_map'ed anything yet */
2105         tot_dsds = 0;
2106
2107         /* Send marker if required */
2108         if (vha->marker_needed != 0) {
2109                 if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
2110                     QLA_SUCCESS) {
2111                         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2112                         return QLA_FUNCTION_FAILED;
2113                 }
2114                 vha->marker_needed = 0;
2115         }
2116
2117         handle = qla2xxx_get_next_handle(req);
2118         if (handle == 0)
2119                 goto queuing_error;
2120
2121         /* Compute number of required data segments */
2122         /* Map the sg table so we have an accurate count of sg entries needed */
2123         if (scsi_sg_count(cmd)) {
2124                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2125                     scsi_sg_count(cmd), cmd->sc_data_direction);
2126                 if (unlikely(!nseg))
2127                         goto queuing_error;
2128                 else
2129                         sp->flags |= SRB_DMA_VALID;
2130
2131                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2132                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2133                         struct qla2_sgx sgx;
2134                         uint32_t        partial;
2135
2136                         memset(&sgx, 0, sizeof(struct qla2_sgx));
2137                         sgx.tot_bytes = scsi_bufflen(cmd);
2138                         sgx.cur_sg = scsi_sglist(cmd);
2139                         sgx.sp = sp;
2140
2141                         nseg = 0;
2142                         while (qla24xx_get_one_block_sg(
2143                             cmd->device->sector_size, &sgx, &partial))
2144                                 nseg++;
2145                 }
2146         } else
2147                 nseg = 0;
2148
2149         /* number of required data segments */
2150         tot_dsds = nseg;
2151
2152         /* Compute number of required protection segments */
2153         if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
2154                 nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
2155                     scsi_prot_sg_count(cmd), cmd->sc_data_direction);
2156                 if (unlikely(!nseg))
2157                         goto queuing_error;
2158                 else
2159                         sp->flags |= SRB_CRC_PROT_DMA_VALID;
2160
2161                 if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2162                     (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2163                         nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
2164                 }
2165         } else {
2166                 nseg = 0;
2167         }
2168
2169         req_cnt = 1;
2170         /* Total Data and protection sg segment(s) */
2171         tot_prot_dsds = nseg;
2172         tot_dsds += nseg;
2173
2174         sp->iores.res_type = RESOURCE_INI;
2175         sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2176         if (qla_get_iocbs(sp->qpair, &sp->iores))
2177                 goto queuing_error;
2178
2179         if (req->cnt < (req_cnt + 2)) {
2180                 if (IS_SHADOW_REG_CAPABLE(ha)) {
2181                         cnt = *req->out_ptr;
2182                 } else {
2183                         cnt = rd_reg_dword_relaxed(req->req_q_out);
2184                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
2185                                 goto queuing_error;
2186                 }
2187
2188                 if (req->ring_index < cnt)
2189                         req->cnt = cnt - req->ring_index;
2190                 else
2191                         req->cnt = req->length -
2192                                 (req->ring_index - cnt);
2193                 if (req->cnt < (req_cnt + 2))
2194                         goto queuing_error;
2195         }
2196
2197         status |= QDSS_GOT_Q_SPACE;
2198
2199         /* Build header part of command packet (excluding the OPCODE). */
2200         req->current_outstanding_cmd = handle;
2201         req->outstanding_cmds[handle] = sp;
2202         sp->handle = handle;
2203         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2204         req->cnt -= req_cnt;
2205
2206         /* Fill-in common area */
2207         cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
2208         cmd_pkt->handle = make_handle(req->id, handle);
2209
2210         clr_ptr = (uint32_t *)cmd_pkt + 2;
2211         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2212
2213         /* Set NPORT-ID and LUN number*/
2214         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2215         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2216         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2217         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2218
2219         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2220         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2221
2222         /* Total Data and protection segment(s) */
2223         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2224
2225         /* Build IOCB segments and adjust for data protection segments */
2226         if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
2227             req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
2228                 QLA_SUCCESS)
2229                 goto queuing_error;
2230
2231         cmd_pkt->entry_count = (uint8_t)req_cnt;
2232         cmd_pkt->timeout = cpu_to_le16(0);
2233         wmb();
2234
2235         /* Adjust ring index. */
2236         req->ring_index++;
2237         if (req->ring_index == req->length) {
2238                 req->ring_index = 0;
2239                 req->ring_ptr = req->ring;
2240         } else
2241                 req->ring_ptr++;
2242
2243         sp->qpair->cmd_cnt++;
2244         /* Set chip new ring index. */
2245         wrt_reg_dword(req->req_q_in, req->ring_index);
2246
2247         /* Manage unprocessed RIO/ZIO commands in response queue. */
2248         if (vha->flags.process_response_queue &&
2249             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2250                 qla24xx_process_response_queue(vha, rsp);
2251
2252         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2253
2254         return QLA_SUCCESS;
2255
2256 queuing_error:
2257         if (status & QDSS_GOT_Q_SPACE) {
2258                 req->outstanding_cmds[handle] = NULL;
2259                 req->cnt += req_cnt;
2260         }
2261         /* Cleanup will be performed by the caller (queuecommand) */
2262
2263         qla_put_iocbs(sp->qpair, &sp->iores);
2264         spin_unlock_irqrestore(&qpair->qp_lock, flags);
2265
2266         return QLA_FUNCTION_FAILED;
2267 }
2268
2269 /* Generic Control-SRB manipulation functions. */
2270
2271 /* hardware_lock assumed to be held. */
2272
2273 void *
2274 __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
2275 {
2276         scsi_qla_host_t *vha = qpair->vha;
2277         struct qla_hw_data *ha = vha->hw;
2278         struct req_que *req = qpair->req;
2279         device_reg_t *reg = ISP_QUE_REG(ha, req->id);
2280         uint32_t handle;
2281         request_t *pkt;
2282         uint16_t cnt, req_cnt;
2283
2284         pkt = NULL;
2285         req_cnt = 1;
2286         handle = 0;
2287
2288         if (sp && (sp->type != SRB_SCSI_CMD)) {
2289                 /* Adjust entry-counts as needed. */
2290                 req_cnt = sp->iocbs;
2291         }
2292
2293         /* Check for room on request queue. */
2294         if (req->cnt < req_cnt + 2) {
2295                 if (qpair->use_shadow_reg)
2296                         cnt = *req->out_ptr;
2297                 else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
2298                     IS_QLA28XX(ha))
2299                         cnt = rd_reg_dword(&reg->isp25mq.req_q_out);
2300                 else if (IS_P3P_TYPE(ha))
2301                         cnt = rd_reg_dword(reg->isp82.req_q_out);
2302                 else if (IS_FWI2_CAPABLE(ha))
2303                         cnt = rd_reg_dword(&reg->isp24.req_q_out);
2304                 else if (IS_QLAFX00(ha))
2305                         cnt = rd_reg_dword(&reg->ispfx00.req_q_out);
2306                 else
2307                         cnt = qla2x00_debounce_register(
2308                             ISP_REQ_Q_OUT(ha, &reg->isp));
2309
2310                 if (!qpair->use_shadow_reg && cnt == ISP_REG16_DISCONNECT) {
2311                         qla_schedule_eeh_work(vha);
2312                         return NULL;
2313                 }
2314
2315                 if  (req->ring_index < cnt)
2316                         req->cnt = cnt - req->ring_index;
2317                 else
2318                         req->cnt = req->length -
2319                             (req->ring_index - cnt);
2320         }
2321         if (req->cnt < req_cnt + 2)
2322                 goto queuing_error;
2323
2324         if (sp) {
2325                 handle = qla2xxx_get_next_handle(req);
2326                 if (handle == 0) {
2327                         ql_log(ql_log_warn, vha, 0x700b,
2328                             "No room on outstanding cmd array.\n");
2329                         goto queuing_error;
2330                 }
2331
2332                 /* Prep command array. */
2333                 req->current_outstanding_cmd = handle;
2334                 req->outstanding_cmds[handle] = sp;
2335                 sp->handle = handle;
2336         }
2337
2338         /* Prep packet */
2339         req->cnt -= req_cnt;
2340         pkt = req->ring_ptr;
2341         memset(pkt, 0, REQUEST_ENTRY_SIZE);
2342         if (IS_QLAFX00(ha)) {
2343                 wrt_reg_byte((u8 __force __iomem *)&pkt->entry_count, req_cnt);
2344                 wrt_reg_dword((__le32 __force __iomem *)&pkt->handle, handle);
2345         } else {
2346                 pkt->entry_count = req_cnt;
2347                 pkt->handle = handle;
2348         }
2349
2350         return pkt;
2351
2352 queuing_error:
2353         qpair->tgt_counters.num_alloc_iocb_failed++;
2354         return pkt;
2355 }
2356
2357 void *
2358 qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
2359 {
2360         scsi_qla_host_t *vha = qpair->vha;
2361
2362         if (qla2x00_reset_active(vha))
2363                 return NULL;
2364
2365         return __qla2x00_alloc_iocbs(qpair, sp);
2366 }
2367
2368 void *
2369 qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
2370 {
2371         return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
2372 }
2373
2374 static void
2375 qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2376 {
2377         struct srb_iocb *lio = &sp->u.iocb_cmd;
2378
2379         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2380         logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2381         if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
2382                 logio->control_flags |= cpu_to_le16(LCF_NVME_PRLI);
2383                 if (sp->vha->flags.nvme_first_burst)
2384                         logio->io_parameter[0] =
2385                                 cpu_to_le32(NVME_PRLI_SP_FIRST_BURST);
2386                 if (sp->vha->flags.nvme2_enabled) {
2387                         /* Set service parameter BIT_7 for NVME CONF support */
2388                         logio->io_parameter[0] |=
2389                                 cpu_to_le32(NVME_PRLI_SP_CONF);
2390                         /* Set service parameter BIT_8 for SLER support */
2391                         logio->io_parameter[0] |=
2392                                 cpu_to_le32(NVME_PRLI_SP_SLER);
2393                         /* Set service parameter BIT_9 for PI control support */
2394                         logio->io_parameter[0] |=
2395                                 cpu_to_le32(NVME_PRLI_SP_PI_CTRL);
2396                 }
2397         }
2398
2399         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2400         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2401         logio->port_id[1] = sp->fcport->d_id.b.area;
2402         logio->port_id[2] = sp->fcport->d_id.b.domain;
2403         logio->vp_index = sp->vha->vp_idx;
2404 }
2405
2406 static void
2407 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2408 {
2409         struct srb_iocb *lio = &sp->u.iocb_cmd;
2410
2411         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2412         logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2413
2414         if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
2415                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2416         } else {
2417                 logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2418                 if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
2419                         logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
2420                 if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
2421                         logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
2422                 if (lio->u.logio.flags & SRB_LOGIN_FCSP) {
2423                         logio->control_flags |=
2424                             cpu_to_le16(LCF_COMMON_FEAT | LCF_SKIP_PRLI);
2425                         logio->io_parameter[0] =
2426                             cpu_to_le32(LIO_COMM_FEAT_FCSP | LIO_COMM_FEAT_CIO);
2427                 }
2428         }
2429         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2430         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2431         logio->port_id[1] = sp->fcport->d_id.b.area;
2432         logio->port_id[2] = sp->fcport->d_id.b.domain;
2433         logio->vp_index = sp->vha->vp_idx;
2434 }
2435
2436 static void
2437 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
2438 {
2439         struct qla_hw_data *ha = sp->vha->hw;
2440         struct srb_iocb *lio = &sp->u.iocb_cmd;
2441         uint16_t opts;
2442
2443         mbx->entry_type = MBX_IOCB_TYPE;
2444         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2445         mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
2446         opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
2447         opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
2448         if (HAS_EXTENDED_IDS(ha)) {
2449                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2450                 mbx->mb10 = cpu_to_le16(opts);
2451         } else {
2452                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
2453         }
2454         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2455         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2456             sp->fcport->d_id.b.al_pa);
2457         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2458 }
2459
2460 static void
2461 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2462 {
2463         u16 control_flags = LCF_COMMAND_LOGO;
2464         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2465
2466         if (sp->fcport->explicit_logout) {
2467                 control_flags |= LCF_EXPL_LOGO|LCF_FREE_NPORT;
2468         } else {
2469                 control_flags |= LCF_IMPL_LOGO;
2470
2471                 if (!sp->fcport->keep_nport_handle)
2472                         control_flags |= LCF_FREE_NPORT;
2473         }
2474
2475         logio->control_flags = cpu_to_le16(control_flags);
2476         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2477         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2478         logio->port_id[1] = sp->fcport->d_id.b.area;
2479         logio->port_id[2] = sp->fcport->d_id.b.domain;
2480         logio->vp_index = sp->vha->vp_idx;
2481 }
2482
2483 static void
2484 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
2485 {
2486         struct qla_hw_data *ha = sp->vha->hw;
2487
2488         mbx->entry_type = MBX_IOCB_TYPE;
2489         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2490         mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
2491         mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
2492             cpu_to_le16(sp->fcport->loop_id) :
2493             cpu_to_le16(sp->fcport->loop_id << 8);
2494         mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2495         mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2496             sp->fcport->d_id.b.al_pa);
2497         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2498         /* Implicit: mbx->mbx10 = 0. */
2499 }
2500
2501 static void
2502 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2503 {
2504         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2505         logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
2506         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2507         logio->vp_index = sp->vha->vp_idx;
2508 }
2509
2510 static void
2511 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
2512 {
2513         struct qla_hw_data *ha = sp->vha->hw;
2514
2515         mbx->entry_type = MBX_IOCB_TYPE;
2516         SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2517         mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
2518         if (HAS_EXTENDED_IDS(ha)) {
2519                 mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2520                 mbx->mb10 = cpu_to_le16(BIT_0);
2521         } else {
2522                 mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
2523         }
2524         mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
2525         mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
2526         mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2527         mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2528         mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2529 }
2530
2531 static void
2532 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2533 {
2534         uint32_t flags;
2535         uint64_t lun;
2536         struct fc_port *fcport = sp->fcport;
2537         scsi_qla_host_t *vha = fcport->vha;
2538         struct qla_hw_data *ha = vha->hw;
2539         struct srb_iocb *iocb = &sp->u.iocb_cmd;
2540         struct req_que *req = vha->req;
2541
2542         flags = iocb->u.tmf.flags;
2543         lun = iocb->u.tmf.lun;
2544
2545         tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2546         tsk->entry_count = 1;
2547         tsk->handle = make_handle(req->id, tsk->handle);
2548         tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2549         tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2550         tsk->control_flags = cpu_to_le32(flags);
2551         tsk->port_id[0] = fcport->d_id.b.al_pa;
2552         tsk->port_id[1] = fcport->d_id.b.area;
2553         tsk->port_id[2] = fcport->d_id.b.domain;
2554         tsk->vp_index = fcport->vha->vp_idx;
2555
2556         if (flags == TCF_LUN_RESET) {
2557                 int_to_scsilun(lun, &tsk->lun);
2558                 host_to_fcp_swap((uint8_t *)&tsk->lun,
2559                         sizeof(tsk->lun));
2560         }
2561 }
2562
2563 void qla2x00_init_timer(srb_t *sp, unsigned long tmo)
2564 {
2565         timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
2566         sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
2567         sp->free = qla2x00_sp_free;
2568         if (IS_QLAFX00(sp->vha->hw) && sp->type == SRB_FXIOCB_DCMD)
2569                 init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
2570         sp->start_timer = 1;
2571 }
2572
2573 static void qla2x00_els_dcmd_sp_free(srb_t *sp)
2574 {
2575         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2576
2577         kfree(sp->fcport);
2578
2579         if (elsio->u.els_logo.els_logo_pyld)
2580                 dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
2581                     elsio->u.els_logo.els_logo_pyld,
2582                     elsio->u.els_logo.els_logo_pyld_dma);
2583
2584         del_timer(&elsio->timer);
2585         qla2x00_rel_sp(sp);
2586 }
2587
2588 static void
2589 qla2x00_els_dcmd_iocb_timeout(void *data)
2590 {
2591         srb_t *sp = data;
2592         fc_port_t *fcport = sp->fcport;
2593         struct scsi_qla_host *vha = sp->vha;
2594         struct srb_iocb *lio = &sp->u.iocb_cmd;
2595         unsigned long flags = 0;
2596         int res, h;
2597
2598         ql_dbg(ql_dbg_io, vha, 0x3069,
2599             "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
2600             sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
2601             fcport->d_id.b.al_pa);
2602
2603         /* Abort the exchange */
2604         res = qla24xx_async_abort_cmd(sp, false);
2605         if (res) {
2606                 ql_dbg(ql_dbg_io, vha, 0x3070,
2607                     "mbx abort_command failed.\n");
2608                 spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2609                 for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2610                         if (sp->qpair->req->outstanding_cmds[h] == sp) {
2611                                 sp->qpair->req->outstanding_cmds[h] = NULL;
2612                                 break;
2613                         }
2614                 }
2615                 spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2616                 complete(&lio->u.els_logo.comp);
2617         } else {
2618                 ql_dbg(ql_dbg_io, vha, 0x3071,
2619                     "mbx abort_command success.\n");
2620         }
2621 }
2622
2623 static void qla2x00_els_dcmd_sp_done(srb_t *sp, int res)
2624 {
2625         fc_port_t *fcport = sp->fcport;
2626         struct srb_iocb *lio = &sp->u.iocb_cmd;
2627         struct scsi_qla_host *vha = sp->vha;
2628
2629         ql_dbg(ql_dbg_io, vha, 0x3072,
2630             "%s hdl=%x, portid=%02x%02x%02x done\n",
2631             sp->name, sp->handle, fcport->d_id.b.domain,
2632             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2633
2634         complete(&lio->u.els_logo.comp);
2635 }
2636
2637 int
2638 qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
2639     port_id_t remote_did)
2640 {
2641         srb_t *sp;
2642         fc_port_t *fcport = NULL;
2643         struct srb_iocb *elsio = NULL;
2644         struct qla_hw_data *ha = vha->hw;
2645         struct els_logo_payload logo_pyld;
2646         int rval = QLA_SUCCESS;
2647
2648         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
2649         if (!fcport) {
2650                ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
2651                return -ENOMEM;
2652         }
2653
2654         /* Alloc SRB structure */
2655         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2656         if (!sp) {
2657                 kfree(fcport);
2658                 ql_log(ql_log_info, vha, 0x70e6,
2659                  "SRB allocation failed\n");
2660                 return -ENOMEM;
2661         }
2662
2663         elsio = &sp->u.iocb_cmd;
2664         fcport->loop_id = 0xFFFF;
2665         fcport->d_id.b.domain = remote_did.b.domain;
2666         fcport->d_id.b.area = remote_did.b.area;
2667         fcport->d_id.b.al_pa = remote_did.b.al_pa;
2668
2669         ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
2670             fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
2671
2672         sp->type = SRB_ELS_DCMD;
2673         sp->name = "ELS_DCMD";
2674         sp->fcport = fcport;
2675         elsio->timeout = qla2x00_els_dcmd_iocb_timeout;
2676         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT);
2677         init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
2678         sp->done = qla2x00_els_dcmd_sp_done;
2679         sp->free = qla2x00_els_dcmd_sp_free;
2680
2681         elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
2682                             DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
2683                             GFP_KERNEL);
2684
2685         if (!elsio->u.els_logo.els_logo_pyld) {
2686                 sp->free(sp);
2687                 return QLA_FUNCTION_FAILED;
2688         }
2689
2690         memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
2691
2692         elsio->u.els_logo.els_cmd = els_opcode;
2693         logo_pyld.opcode = els_opcode;
2694         logo_pyld.s_id[0] = vha->d_id.b.al_pa;
2695         logo_pyld.s_id[1] = vha->d_id.b.area;
2696         logo_pyld.s_id[2] = vha->d_id.b.domain;
2697         host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
2698         memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
2699
2700         memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
2701             sizeof(struct els_logo_payload));
2702         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3075, "LOGO buffer:");
2703         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x010a,
2704                        elsio->u.els_logo.els_logo_pyld,
2705                        sizeof(*elsio->u.els_logo.els_logo_pyld));
2706
2707         rval = qla2x00_start_sp(sp);
2708         if (rval != QLA_SUCCESS) {
2709                 sp->free(sp);
2710                 return QLA_FUNCTION_FAILED;
2711         }
2712
2713         ql_dbg(ql_dbg_io, vha, 0x3074,
2714             "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
2715             sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
2716             fcport->d_id.b.area, fcport->d_id.b.al_pa);
2717
2718         wait_for_completion(&elsio->u.els_logo.comp);
2719
2720         sp->free(sp);
2721         return rval;
2722 }
2723
2724 static void
2725 qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2726 {
2727         scsi_qla_host_t *vha = sp->vha;
2728         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2729
2730         els_iocb->entry_type = ELS_IOCB_TYPE;
2731         els_iocb->entry_count = 1;
2732         els_iocb->sys_define = 0;
2733         els_iocb->entry_status = 0;
2734         els_iocb->handle = sp->handle;
2735         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2736         els_iocb->tx_dsd_count = cpu_to_le16(1);
2737         els_iocb->vp_index = vha->vp_idx;
2738         els_iocb->sof_type = EST_SOFI3;
2739         els_iocb->rx_dsd_count = 0;
2740         els_iocb->opcode = elsio->u.els_logo.els_cmd;
2741
2742         els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
2743         els_iocb->d_id[1] = sp->fcport->d_id.b.area;
2744         els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
2745         /* For SID the byte order is different than DID */
2746         els_iocb->s_id[1] = vha->d_id.b.al_pa;
2747         els_iocb->s_id[2] = vha->d_id.b.area;
2748         els_iocb->s_id[0] = vha->d_id.b.domain;
2749
2750         if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
2751                 if (vha->hw->flags.edif_enabled)
2752                         els_iocb->control_flags = cpu_to_le16(ECF_SEC_LOGIN);
2753                 else
2754                         els_iocb->control_flags = 0;
2755                 els_iocb->tx_byte_count = els_iocb->tx_len =
2756                         cpu_to_le32(sizeof(struct els_plogi_payload));
2757                 put_unaligned_le64(elsio->u.els_plogi.els_plogi_pyld_dma,
2758                                    &els_iocb->tx_address);
2759                 els_iocb->rx_dsd_count = cpu_to_le16(1);
2760                 els_iocb->rx_byte_count = els_iocb->rx_len =
2761                         cpu_to_le32(sizeof(struct els_plogi_payload));
2762                 put_unaligned_le64(elsio->u.els_plogi.els_resp_pyld_dma,
2763                                    &els_iocb->rx_address);
2764
2765                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
2766                     "PLOGI ELS IOCB:\n");
2767                 ql_dump_buffer(ql_log_info, vha, 0x0109,
2768                     (uint8_t *)els_iocb,
2769                     sizeof(*els_iocb));
2770         } else {
2771                 els_iocb->tx_byte_count =
2772                         cpu_to_le32(sizeof(struct els_logo_payload));
2773                 put_unaligned_le64(elsio->u.els_logo.els_logo_pyld_dma,
2774                                    &els_iocb->tx_address);
2775                 els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
2776
2777                 els_iocb->rx_byte_count = 0;
2778                 els_iocb->rx_address = 0;
2779                 els_iocb->rx_len = 0;
2780                 ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3076,
2781                        "LOGO ELS IOCB:");
2782                 ql_dump_buffer(ql_log_info, vha, 0x010b,
2783                                els_iocb,
2784                                sizeof(*els_iocb));
2785         }
2786
2787         sp->vha->qla_stats.control_requests++;
2788 }
2789
2790 static void
2791 qla2x00_els_dcmd2_iocb_timeout(void *data)
2792 {
2793         srb_t *sp = data;
2794         fc_port_t *fcport = sp->fcport;
2795         struct scsi_qla_host *vha = sp->vha;
2796         unsigned long flags = 0;
2797         int res, h;
2798
2799         ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
2800             "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
2801             sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
2802
2803         /* Abort the exchange */
2804         res = qla24xx_async_abort_cmd(sp, false);
2805         ql_dbg(ql_dbg_io, vha, 0x3070,
2806             "mbx abort_command %s\n",
2807             (res == QLA_SUCCESS) ? "successful" : "failed");
2808         if (res) {
2809                 spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2810                 for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2811                         if (sp->qpair->req->outstanding_cmds[h] == sp) {
2812                                 sp->qpair->req->outstanding_cmds[h] = NULL;
2813                                 break;
2814                         }
2815                 }
2816                 spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2817                 sp->done(sp, QLA_FUNCTION_TIMEOUT);
2818         }
2819 }
2820
2821 void qla2x00_els_dcmd2_free(scsi_qla_host_t *vha, struct els_plogi *els_plogi)
2822 {
2823         if (els_plogi->els_plogi_pyld)
2824                 dma_free_coherent(&vha->hw->pdev->dev,
2825                                   els_plogi->tx_size,
2826                                   els_plogi->els_plogi_pyld,
2827                                   els_plogi->els_plogi_pyld_dma);
2828
2829         if (els_plogi->els_resp_pyld)
2830                 dma_free_coherent(&vha->hw->pdev->dev,
2831                                   els_plogi->rx_size,
2832                                   els_plogi->els_resp_pyld,
2833                                   els_plogi->els_resp_pyld_dma);
2834 }
2835
2836 static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
2837 {
2838         fc_port_t *fcport = sp->fcport;
2839         struct srb_iocb *lio = &sp->u.iocb_cmd;
2840         struct scsi_qla_host *vha = sp->vha;
2841         struct event_arg ea;
2842         struct qla_work_evt *e;
2843         struct fc_port *conflict_fcport;
2844         port_id_t cid;  /* conflict Nport id */
2845         const __le32 *fw_status = sp->u.iocb_cmd.u.els_plogi.fw_status;
2846         u16 lid;
2847
2848         ql_dbg(ql_dbg_disc, vha, 0x3072,
2849             "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
2850             sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
2851
2852         fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
2853         del_timer(&sp->u.iocb_cmd.timer);
2854
2855         if (sp->flags & SRB_WAKEUP_ON_COMP)
2856                 complete(&lio->u.els_plogi.comp);
2857         else {
2858                 switch (le32_to_cpu(fw_status[0])) {
2859                 case CS_DATA_UNDERRUN:
2860                 case CS_COMPLETE:
2861                         memset(&ea, 0, sizeof(ea));
2862                         ea.fcport = fcport;
2863                         ea.rc = res;
2864                         qla_handle_els_plogi_done(vha, &ea);
2865                         break;
2866
2867                 case CS_IOCB_ERROR:
2868                         switch (le32_to_cpu(fw_status[1])) {
2869                         case LSC_SCODE_PORTID_USED:
2870                                 lid = le32_to_cpu(fw_status[2]) & 0xffff;
2871                                 qlt_find_sess_invalidate_other(vha,
2872                                     wwn_to_u64(fcport->port_name),
2873                                     fcport->d_id, lid, &conflict_fcport);
2874                                 if (conflict_fcport) {
2875                                         /*
2876                                          * Another fcport shares the same
2877                                          * loop_id & nport id; conflict
2878                                          * fcport needs to finish cleanup
2879                                          * before this fcport can proceed
2880                                          * to login.
2881                                          */
2882                                         conflict_fcport->conflict = fcport;
2883                                         fcport->login_pause = 1;
2884                                         ql_dbg(ql_dbg_disc, vha, 0x20ed,
2885                                             "%s %d %8phC pid %06x inuse with lid %#x post gidpn\n",
2886                                             __func__, __LINE__,
2887                                             fcport->port_name,
2888                                             fcport->d_id.b24, lid);
2889                                 } else {
2890                                         ql_dbg(ql_dbg_disc, vha, 0x20ed,
2891                                             "%s %d %8phC pid %06x inuse with lid %#x sched del\n",
2892                                             __func__, __LINE__,
2893                                             fcport->port_name,
2894                                             fcport->d_id.b24, lid);
2895                                         qla2x00_clear_loop_id(fcport);
2896                                         set_bit(lid, vha->hw->loop_id_map);
2897                                         fcport->loop_id = lid;
2898                                         fcport->keep_nport_handle = 0;
2899                                         qlt_schedule_sess_for_deletion(fcport);
2900                                 }
2901                                 break;
2902
2903                         case LSC_SCODE_NPORT_USED:
2904                                 cid.b.domain = (le32_to_cpu(fw_status[2]) >> 16)
2905                                         & 0xff;
2906                                 cid.b.area   = (le32_to_cpu(fw_status[2]) >>  8)
2907                                         & 0xff;
2908                                 cid.b.al_pa  = le32_to_cpu(fw_status[2]) & 0xff;
2909                                 cid.b.rsvd_1 = 0;
2910
2911                                 ql_dbg(ql_dbg_disc, vha, 0x20ec,
2912                                     "%s %d %8phC lid %#x in use with pid %06x post gnl\n",
2913                                     __func__, __LINE__, fcport->port_name,
2914                                     fcport->loop_id, cid.b24);
2915                                 set_bit(fcport->loop_id,
2916                                     vha->hw->loop_id_map);
2917                                 fcport->loop_id = FC_NO_LOOP_ID;
2918                                 qla24xx_post_gnl_work(vha, fcport);
2919                                 break;
2920
2921                         case LSC_SCODE_NOXCB:
2922                                 vha->hw->exch_starvation++;
2923                                 if (vha->hw->exch_starvation > 5) {
2924                                         ql_log(ql_log_warn, vha, 0xd046,
2925                                             "Exchange starvation. Resetting RISC\n");
2926                                         vha->hw->exch_starvation = 0;
2927                                         set_bit(ISP_ABORT_NEEDED,
2928                                             &vha->dpc_flags);
2929                                         qla2xxx_wake_dpc(vha);
2930                                 }
2931                                 fallthrough;
2932                         default:
2933                                 ql_dbg(ql_dbg_disc, vha, 0x20eb,
2934                                     "%s %8phC cmd error 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                                 fcport->flags &= ~FCF_ASYNC_SENT;
2939                                 qla2x00_set_fcport_disc_state(fcport,
2940                                     DSC_LOGIN_FAILED);
2941                                 set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2942                                 break;
2943                         }
2944                         break;
2945
2946                 default:
2947                         ql_dbg(ql_dbg_disc, vha, 0x20eb,
2948                             "%s %8phC cmd error 2 fw_status 0x%x 0x%x 0x%x\n",
2949                             __func__, sp->fcport->port_name,
2950                             fw_status[0], fw_status[1], fw_status[2]);
2951
2952                         sp->fcport->flags &= ~FCF_ASYNC_SENT;
2953                         qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_FAILED);
2954                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2955                         break;
2956                 }
2957
2958                 e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
2959                 if (!e) {
2960                         struct srb_iocb *elsio = &sp->u.iocb_cmd;
2961
2962                         qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
2963                         sp->free(sp);
2964                         return;
2965                 }
2966                 e->u.iosb.sp = sp;
2967                 qla2x00_post_work(vha, e);
2968         }
2969 }
2970
2971 int
2972 qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
2973     fc_port_t *fcport, bool wait)
2974 {
2975         srb_t *sp;
2976         struct srb_iocb *elsio = NULL;
2977         struct qla_hw_data *ha = vha->hw;
2978         int rval = QLA_SUCCESS;
2979         void    *ptr, *resp_ptr;
2980
2981         /* Alloc SRB structure */
2982         sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2983         if (!sp) {
2984                 ql_log(ql_log_info, vha, 0x70e6,
2985                  "SRB allocation failed\n");
2986                 fcport->flags &= ~FCF_ASYNC_ACTIVE;
2987                 return -ENOMEM;
2988         }
2989
2990         fcport->flags |= FCF_ASYNC_SENT;
2991         qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_PEND);
2992         elsio = &sp->u.iocb_cmd;
2993         ql_dbg(ql_dbg_io, vha, 0x3073,
2994                "%s Enter: PLOGI portid=%06x\n", __func__, fcport->d_id.b24);
2995
2996         sp->type = SRB_ELS_DCMD;
2997         sp->name = "ELS_DCMD";
2998         sp->fcport = fcport;
2999
3000         elsio->timeout = qla2x00_els_dcmd2_iocb_timeout;
3001         if (wait)
3002                 sp->flags = SRB_WAKEUP_ON_COMP;
3003
3004         qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT + 2);
3005
3006         sp->done = qla2x00_els_dcmd2_sp_done;
3007         elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
3008
3009         ptr = elsio->u.els_plogi.els_plogi_pyld =
3010             dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.tx_size,
3011                 &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
3012
3013         if (!elsio->u.els_plogi.els_plogi_pyld) {
3014                 rval = QLA_FUNCTION_FAILED;
3015                 goto out;
3016         }
3017
3018         resp_ptr = elsio->u.els_plogi.els_resp_pyld =
3019             dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.rx_size,
3020                 &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
3021
3022         if (!elsio->u.els_plogi.els_resp_pyld) {
3023                 rval = QLA_FUNCTION_FAILED;
3024                 goto out;
3025         }
3026
3027         ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
3028
3029         memset(ptr, 0, sizeof(struct els_plogi_payload));
3030         memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
3031         memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
3032             &ha->plogi_els_payld.fl_csp, LOGIN_TEMPLATE_SIZE);
3033
3034         elsio->u.els_plogi.els_cmd = els_opcode;
3035         elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
3036
3037         if (els_opcode == ELS_DCMD_PLOGI && DBELL_ACTIVE(vha)) {
3038                 struct fc_els_flogi *p = ptr;
3039
3040                 p->fl_csp.sp_features |= cpu_to_be16(FC_SP_FT_SEC);
3041         }
3042
3043         ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
3044         ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
3045             (uint8_t *)elsio->u.els_plogi.els_plogi_pyld,
3046             sizeof(*elsio->u.els_plogi.els_plogi_pyld));
3047
3048         init_completion(&elsio->u.els_plogi.comp);
3049         rval = qla2x00_start_sp(sp);
3050         if (rval != QLA_SUCCESS) {
3051                 rval = QLA_FUNCTION_FAILED;
3052         } else {
3053                 ql_dbg(ql_dbg_disc, vha, 0x3074,
3054                     "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
3055                     sp->name, sp->handle, fcport->loop_id,
3056                     fcport->d_id.b24, vha->d_id.b24);
3057         }
3058
3059         if (wait) {
3060                 wait_for_completion(&elsio->u.els_plogi.comp);
3061
3062                 if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
3063                         rval = QLA_FUNCTION_FAILED;
3064         } else {
3065                 goto done;
3066         }
3067
3068 out:
3069         fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
3070         qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
3071         sp->free(sp);
3072 done:
3073         return rval;
3074 }
3075
3076 /* it is assume qpair lock is held */
3077 void qla_els_pt_iocb(struct scsi_qla_host *vha,
3078         struct els_entry_24xx *els_iocb,
3079         struct qla_els_pt_arg *a)
3080 {
3081         els_iocb->entry_type = ELS_IOCB_TYPE;
3082         els_iocb->entry_count = 1;
3083         els_iocb->sys_define = 0;
3084         els_iocb->entry_status = 0;
3085         els_iocb->handle = QLA_SKIP_HANDLE;
3086         els_iocb->nport_handle = a->nport_handle;
3087         els_iocb->rx_xchg_address = a->rx_xchg_address;
3088         els_iocb->tx_dsd_count = cpu_to_le16(1);
3089         els_iocb->vp_index = a->vp_idx;
3090         els_iocb->sof_type = EST_SOFI3;
3091         els_iocb->rx_dsd_count = cpu_to_le16(0);
3092         els_iocb->opcode = a->els_opcode;
3093
3094         els_iocb->d_id[0] = a->did.b.al_pa;
3095         els_iocb->d_id[1] = a->did.b.area;
3096         els_iocb->d_id[2] = a->did.b.domain;
3097         /* For SID the byte order is different than DID */
3098         els_iocb->s_id[1] = vha->d_id.b.al_pa;
3099         els_iocb->s_id[2] = vha->d_id.b.area;
3100         els_iocb->s_id[0] = vha->d_id.b.domain;
3101
3102         els_iocb->control_flags = cpu_to_le16(a->control_flags);
3103
3104         els_iocb->tx_byte_count = cpu_to_le32(a->tx_byte_count);
3105         els_iocb->tx_len = cpu_to_le32(a->tx_len);
3106         put_unaligned_le64(a->tx_addr, &els_iocb->tx_address);
3107
3108         els_iocb->rx_byte_count = cpu_to_le32(a->rx_byte_count);
3109         els_iocb->rx_len = cpu_to_le32(a->rx_len);
3110         put_unaligned_le64(a->rx_addr, &els_iocb->rx_address);
3111 }
3112
3113 static void
3114 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
3115 {
3116         struct bsg_job *bsg_job = sp->u.bsg_job;
3117         struct fc_bsg_request *bsg_request = bsg_job->request;
3118
3119         els_iocb->entry_type = ELS_IOCB_TYPE;
3120         els_iocb->entry_count = 1;
3121         els_iocb->sys_define = 0;
3122         els_iocb->entry_status = 0;
3123         els_iocb->handle = sp->handle;
3124         els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3125         els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3126         els_iocb->vp_index = sp->vha->vp_idx;
3127         els_iocb->sof_type = EST_SOFI3;
3128         els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3129
3130         els_iocb->opcode =
3131             sp->type == SRB_ELS_CMD_RPT ?
3132             bsg_request->rqst_data.r_els.els_code :
3133             bsg_request->rqst_data.h_els.command_code;
3134         els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
3135         els_iocb->d_id[1] = sp->fcport->d_id.b.area;
3136         els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
3137         els_iocb->control_flags = 0;
3138         els_iocb->rx_byte_count =
3139             cpu_to_le32(bsg_job->reply_payload.payload_len);
3140         els_iocb->tx_byte_count =
3141             cpu_to_le32(bsg_job->request_payload.payload_len);
3142
3143         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3144                            &els_iocb->tx_address);
3145         els_iocb->tx_len = cpu_to_le32(sg_dma_len
3146             (bsg_job->request_payload.sg_list));
3147
3148         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3149                            &els_iocb->rx_address);
3150         els_iocb->rx_len = cpu_to_le32(sg_dma_len
3151             (bsg_job->reply_payload.sg_list));
3152
3153         sp->vha->qla_stats.control_requests++;
3154 }
3155
3156 static void
3157 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
3158 {
3159         uint16_t        avail_dsds;
3160         struct dsd64    *cur_dsd;
3161         struct scatterlist *sg;
3162         int index;
3163         uint16_t tot_dsds;
3164         scsi_qla_host_t *vha = sp->vha;
3165         struct qla_hw_data *ha = vha->hw;
3166         struct bsg_job *bsg_job = sp->u.bsg_job;
3167         int entry_count = 1;
3168
3169         memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
3170         ct_iocb->entry_type = CT_IOCB_TYPE;
3171         ct_iocb->entry_status = 0;
3172         ct_iocb->handle1 = sp->handle;
3173         SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
3174         ct_iocb->status = cpu_to_le16(0);
3175         ct_iocb->control_flags = cpu_to_le16(0);
3176         ct_iocb->timeout = 0;
3177         ct_iocb->cmd_dsd_count =
3178             cpu_to_le16(bsg_job->request_payload.sg_cnt);
3179         ct_iocb->total_dsd_count =
3180             cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
3181         ct_iocb->req_bytecount =
3182             cpu_to_le32(bsg_job->request_payload.payload_len);
3183         ct_iocb->rsp_bytecount =
3184             cpu_to_le32(bsg_job->reply_payload.payload_len);
3185
3186         put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3187                            &ct_iocb->req_dsd.address);
3188         ct_iocb->req_dsd.length = ct_iocb->req_bytecount;
3189
3190         put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3191                            &ct_iocb->rsp_dsd.address);
3192         ct_iocb->rsp_dsd.length = ct_iocb->rsp_bytecount;
3193
3194         avail_dsds = 1;
3195         cur_dsd = &ct_iocb->rsp_dsd;
3196         index = 0;
3197         tot_dsds = bsg_job->reply_payload.sg_cnt;
3198
3199         for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
3200                 cont_a64_entry_t *cont_pkt;
3201
3202                 /* Allocate additional continuation packets? */
3203                 if (avail_dsds == 0) {
3204                         /*
3205                         * Five DSDs are available in the Cont.
3206                         * Type 1 IOCB.
3207                                */
3208                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3209                             vha->hw->req_q_map[0]);
3210                         cur_dsd = cont_pkt->dsd;
3211                         avail_dsds = 5;
3212                         entry_count++;
3213                 }
3214
3215                 append_dsd64(&cur_dsd, sg);
3216                 avail_dsds--;
3217         }
3218         ct_iocb->entry_count = entry_count;
3219
3220         sp->vha->qla_stats.control_requests++;
3221 }
3222
3223 static void
3224 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
3225 {
3226         uint16_t        avail_dsds;
3227         struct dsd64    *cur_dsd;
3228         struct scatterlist *sg;
3229         int index;
3230         uint16_t cmd_dsds, rsp_dsds;
3231         scsi_qla_host_t *vha = sp->vha;
3232         struct qla_hw_data *ha = vha->hw;
3233         struct bsg_job *bsg_job = sp->u.bsg_job;
3234         int entry_count = 1;
3235         cont_a64_entry_t *cont_pkt = NULL;
3236
3237         ct_iocb->entry_type = CT_IOCB_TYPE;
3238         ct_iocb->entry_status = 0;
3239         ct_iocb->sys_define = 0;
3240         ct_iocb->handle = sp->handle;
3241
3242         ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3243         ct_iocb->vp_index = sp->vha->vp_idx;
3244         ct_iocb->comp_status = cpu_to_le16(0);
3245
3246         cmd_dsds = bsg_job->request_payload.sg_cnt;
3247         rsp_dsds = bsg_job->reply_payload.sg_cnt;
3248
3249         ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
3250         ct_iocb->timeout = 0;
3251         ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
3252         ct_iocb->cmd_byte_count =
3253             cpu_to_le32(bsg_job->request_payload.payload_len);
3254
3255         avail_dsds = 2;
3256         cur_dsd = ct_iocb->dsd;
3257         index = 0;
3258
3259         for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
3260                 /* Allocate additional continuation packets? */
3261                 if (avail_dsds == 0) {
3262                         /*
3263                          * Five DSDs are available in the Cont.
3264                          * Type 1 IOCB.
3265                          */
3266                         cont_pkt = qla2x00_prep_cont_type1_iocb(
3267                             vha, ha->req_q_map[0]);
3268                         cur_dsd = cont_pkt->dsd;
3269                         avail_dsds = 5;
3270                         entry_count++;
3271                 }
3272
3273                 append_dsd64(&cur_dsd, sg);
3274                 avail_dsds--;
3275         }
3276
3277         index = 0;
3278
3279         for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
3280                 /* Allocate additional continuation packets? */
3281                 if (avail_dsds == 0) {
3282                         /*
3283                         * Five DSDs are available in the Cont.
3284                         * Type 1 IOCB.
3285                                */
3286                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3287                             ha->req_q_map[0]);
3288                         cur_dsd = cont_pkt->dsd;
3289                         avail_dsds = 5;
3290                         entry_count++;
3291                 }
3292
3293                 append_dsd64(&cur_dsd, sg);
3294                 avail_dsds--;
3295         }
3296         ct_iocb->entry_count = entry_count;
3297 }
3298
3299 /*
3300  * qla82xx_start_scsi() - Send a SCSI command to the ISP
3301  * @sp: command to send to the ISP
3302  *
3303  * Returns non-zero if a failure occurred, else zero.
3304  */
3305 int
3306 qla82xx_start_scsi(srb_t *sp)
3307 {
3308         int             nseg;
3309         unsigned long   flags;
3310         struct scsi_cmnd *cmd;
3311         uint32_t        *clr_ptr;
3312         uint32_t        handle;
3313         uint16_t        cnt;
3314         uint16_t        req_cnt;
3315         uint16_t        tot_dsds;
3316         struct device_reg_82xx __iomem *reg;
3317         uint32_t dbval;
3318         __be32 *fcp_dl;
3319         uint8_t additional_cdb_len;
3320         struct ct6_dsd *ctx;
3321         struct scsi_qla_host *vha = sp->vha;
3322         struct qla_hw_data *ha = vha->hw;
3323         struct req_que *req = NULL;
3324         struct rsp_que *rsp = NULL;
3325
3326         /* Setup device pointers. */
3327         reg = &ha->iobase->isp82;
3328         cmd = GET_CMD_SP(sp);
3329         req = vha->req;
3330         rsp = ha->rsp_q_map[0];
3331
3332         /* So we know we haven't pci_map'ed anything yet */
3333         tot_dsds = 0;
3334
3335         dbval = 0x04 | (ha->portnum << 5);
3336
3337         /* Send marker if required */
3338         if (vha->marker_needed != 0) {
3339                 if (qla2x00_marker(vha, ha->base_qpair,
3340                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
3341                         ql_log(ql_log_warn, vha, 0x300c,
3342                             "qla2x00_marker failed for cmd=%p.\n", cmd);
3343                         return QLA_FUNCTION_FAILED;
3344                 }
3345                 vha->marker_needed = 0;
3346         }
3347
3348         /* Acquire ring specific lock */
3349         spin_lock_irqsave(&ha->hardware_lock, flags);
3350
3351         handle = qla2xxx_get_next_handle(req);
3352         if (handle == 0)
3353                 goto queuing_error;
3354
3355         /* Map the sg table so we have an accurate count of sg entries needed */
3356         if (scsi_sg_count(cmd)) {
3357                 nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
3358                     scsi_sg_count(cmd), cmd->sc_data_direction);
3359                 if (unlikely(!nseg))
3360                         goto queuing_error;
3361         } else
3362                 nseg = 0;
3363
3364         tot_dsds = nseg;
3365
3366         if (tot_dsds > ql2xshiftctondsd) {
3367                 struct cmd_type_6 *cmd_pkt;
3368                 uint16_t more_dsd_lists = 0;
3369                 struct dsd_dma *dsd_ptr;
3370                 uint16_t i;
3371
3372                 more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
3373                 if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
3374                         ql_dbg(ql_dbg_io, vha, 0x300d,
3375                             "Num of DSD list %d is than %d for cmd=%p.\n",
3376                             more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
3377                             cmd);
3378                         goto queuing_error;
3379                 }
3380
3381                 if (more_dsd_lists <= ha->gbl_dsd_avail)
3382                         goto sufficient_dsds;
3383                 else
3384                         more_dsd_lists -= ha->gbl_dsd_avail;
3385
3386                 for (i = 0; i < more_dsd_lists; i++) {
3387                         dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
3388                         if (!dsd_ptr) {
3389                                 ql_log(ql_log_fatal, vha, 0x300e,
3390                                     "Failed to allocate memory for dsd_dma "
3391                                     "for cmd=%p.\n", cmd);
3392                                 goto queuing_error;
3393                         }
3394
3395                         dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
3396                                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
3397                         if (!dsd_ptr->dsd_addr) {
3398                                 kfree(dsd_ptr);
3399                                 ql_log(ql_log_fatal, vha, 0x300f,
3400                                     "Failed to allocate memory for dsd_addr "
3401                                     "for cmd=%p.\n", cmd);
3402                                 goto queuing_error;
3403                         }
3404                         list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
3405                         ha->gbl_dsd_avail++;
3406                 }
3407
3408 sufficient_dsds:
3409                 req_cnt = 1;
3410
3411                 if (req->cnt < (req_cnt + 2)) {
3412                         cnt = (uint16_t)rd_reg_dword_relaxed(
3413                                 &reg->req_q_out[0]);
3414                         if (req->ring_index < cnt)
3415                                 req->cnt = cnt - req->ring_index;
3416                         else
3417                                 req->cnt = req->length -
3418                                         (req->ring_index - cnt);
3419                         if (req->cnt < (req_cnt + 2))
3420                                 goto queuing_error;
3421                 }
3422
3423                 ctx = sp->u.scmd.ct6_ctx =
3424                     mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
3425                 if (!ctx) {
3426                         ql_log(ql_log_fatal, vha, 0x3010,
3427                             "Failed to allocate ctx for cmd=%p.\n", cmd);
3428                         goto queuing_error;
3429                 }
3430
3431                 memset(ctx, 0, sizeof(struct ct6_dsd));
3432                 ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
3433                         GFP_ATOMIC, &ctx->fcp_cmnd_dma);
3434                 if (!ctx->fcp_cmnd) {
3435                         ql_log(ql_log_fatal, vha, 0x3011,
3436                             "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
3437                         goto queuing_error;
3438                 }
3439
3440                 /* Initialize the DSD list and dma handle */
3441                 INIT_LIST_HEAD(&ctx->dsd_list);
3442                 ctx->dsd_use_cnt = 0;
3443
3444                 if (cmd->cmd_len > 16) {
3445                         additional_cdb_len = cmd->cmd_len - 16;
3446                         if ((cmd->cmd_len % 4) != 0) {
3447                                 /* SCSI command bigger than 16 bytes must be
3448                                  * multiple of 4
3449                                  */
3450                                 ql_log(ql_log_warn, vha, 0x3012,
3451                                     "scsi cmd len %d not multiple of 4 "
3452                                     "for cmd=%p.\n", cmd->cmd_len, cmd);
3453                                 goto queuing_error_fcp_cmnd;
3454                         }
3455                         ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
3456                 } else {
3457                         additional_cdb_len = 0;
3458                         ctx->fcp_cmnd_len = 12 + 16 + 4;
3459                 }
3460
3461                 cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
3462                 cmd_pkt->handle = make_handle(req->id, handle);
3463
3464                 /* Zero out remaining portion of packet. */
3465                 /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
3466                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3467                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3468                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3469
3470                 /* Set NPORT-ID and LUN number*/
3471                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3472                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3473                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3474                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3475                 cmd_pkt->vp_index = sp->vha->vp_idx;
3476
3477                 /* Build IOCB segments */
3478                 if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
3479                         goto queuing_error_fcp_cmnd;
3480
3481                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3482                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
3483
3484                 /* build FCP_CMND IU */
3485                 int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
3486                 ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
3487
3488                 if (cmd->sc_data_direction == DMA_TO_DEVICE)
3489                         ctx->fcp_cmnd->additional_cdb_len |= 1;
3490                 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
3491                         ctx->fcp_cmnd->additional_cdb_len |= 2;
3492
3493                 /* Populate the FCP_PRIO. */
3494                 if (ha->flags.fcp_prio_enabled)
3495                         ctx->fcp_cmnd->task_attribute |=
3496                             sp->fcport->fcp_prio << 3;
3497
3498                 memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
3499
3500                 fcp_dl = (__be32 *)(ctx->fcp_cmnd->cdb + 16 +
3501                     additional_cdb_len);
3502                 *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
3503
3504                 cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
3505                 put_unaligned_le64(ctx->fcp_cmnd_dma,
3506                                    &cmd_pkt->fcp_cmnd_dseg_address);
3507
3508                 sp->flags |= SRB_FCP_CMND_DMA_VALID;
3509                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3510                 /* Set total data segment count. */
3511                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3512                 /* Specify response queue number where
3513                  * completion should happen
3514                  */
3515                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3516         } else {
3517                 struct cmd_type_7 *cmd_pkt;
3518
3519                 req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3520                 if (req->cnt < (req_cnt + 2)) {
3521                         cnt = (uint16_t)rd_reg_dword_relaxed(
3522                             &reg->req_q_out[0]);
3523                         if (req->ring_index < cnt)
3524                                 req->cnt = cnt - req->ring_index;
3525                         else
3526                                 req->cnt = req->length -
3527                                         (req->ring_index - cnt);
3528                 }
3529                 if (req->cnt < (req_cnt + 2))
3530                         goto queuing_error;
3531
3532                 cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
3533                 cmd_pkt->handle = make_handle(req->id, handle);
3534
3535                 /* Zero out remaining portion of packet. */
3536                 /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3537                 clr_ptr = (uint32_t *)cmd_pkt + 2;
3538                 memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3539                 cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3540
3541                 /* Set NPORT-ID and LUN number*/
3542                 cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3543                 cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3544                 cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3545                 cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3546                 cmd_pkt->vp_index = sp->vha->vp_idx;
3547
3548                 int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3549                 host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
3550                     sizeof(cmd_pkt->lun));
3551
3552                 /* Populate the FCP_PRIO. */
3553                 if (ha->flags.fcp_prio_enabled)
3554                         cmd_pkt->task |= sp->fcport->fcp_prio << 3;
3555
3556                 /* Load SCSI command packet. */
3557                 memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
3558                 host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
3559
3560                 cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3561
3562                 /* Build IOCB segments */
3563                 qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
3564
3565                 /* Set total data segment count. */
3566                 cmd_pkt->entry_count = (uint8_t)req_cnt;
3567                 /* Specify response queue number where
3568                  * completion should happen.
3569                  */
3570                 cmd_pkt->entry_status = (uint8_t) rsp->id;
3571
3572         }
3573         /* Build command packet. */
3574         req->current_outstanding_cmd = handle;
3575         req->outstanding_cmds[handle] = sp;
3576         sp->handle = handle;
3577         cmd->host_scribble = (unsigned char *)(unsigned long)handle;
3578         req->cnt -= req_cnt;
3579         wmb();
3580
3581         /* Adjust ring index. */
3582         req->ring_index++;
3583         if (req->ring_index == req->length) {
3584                 req->ring_index = 0;
3585                 req->ring_ptr = req->ring;
3586         } else
3587                 req->ring_ptr++;
3588
3589         sp->flags |= SRB_DMA_VALID;
3590
3591         /* Set chip new ring index. */
3592         /* write, read and verify logic */
3593         dbval = dbval | (req->id << 8) | (req->ring_index << 16);
3594         if (ql2xdbwr)
3595                 qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
3596         else {
3597                 wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3598                 wmb();
3599                 while (rd_reg_dword(ha->nxdb_rd_ptr) != dbval) {
3600                         wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3601                         wmb();
3602                 }
3603         }
3604
3605         /* Manage unprocessed RIO/ZIO commands in response queue. */
3606         if (vha->flags.process_response_queue &&
3607             rsp->ring_ptr->signature != RESPONSE_PROCESSED)
3608                 qla24xx_process_response_queue(vha, rsp);
3609
3610         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3611         return QLA_SUCCESS;
3612
3613 queuing_error_fcp_cmnd:
3614         dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
3615 queuing_error:
3616         if (tot_dsds)
3617                 scsi_dma_unmap(cmd);
3618
3619         if (sp->u.scmd.crc_ctx) {
3620                 mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
3621                 sp->u.scmd.crc_ctx = NULL;
3622         }
3623         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3624
3625         return QLA_FUNCTION_FAILED;
3626 }
3627
3628 static void
3629 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
3630 {
3631         struct srb_iocb *aio = &sp->u.iocb_cmd;
3632         scsi_qla_host_t *vha = sp->vha;
3633         struct req_que *req = sp->qpair->req;
3634         srb_t *orig_sp = sp->cmd_sp;
3635
3636         memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
3637         abt_iocb->entry_type = ABORT_IOCB_TYPE;
3638         abt_iocb->entry_count = 1;
3639         abt_iocb->handle = make_handle(req->id, sp->handle);
3640         if (sp->fcport) {
3641                 abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3642                 abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
3643                 abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
3644                 abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
3645         }
3646         abt_iocb->handle_to_abort =
3647                 make_handle(le16_to_cpu(aio->u.abt.req_que_no),
3648                             aio->u.abt.cmd_hndl);
3649         abt_iocb->vp_index = vha->vp_idx;
3650         abt_iocb->req_que_no = aio->u.abt.req_que_no;
3651
3652         /* need to pass original sp */
3653         if (orig_sp)
3654                 qla_nvme_abort_set_option(abt_iocb, orig_sp);
3655
3656         /* Send the command to the firmware */
3657         wmb();
3658 }
3659
3660 static void
3661 qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
3662 {
3663         int i, sz;
3664
3665         mbx->entry_type = MBX_IOCB_TYPE;
3666         mbx->handle = sp->handle;
3667         sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
3668
3669         for (i = 0; i < sz; i++)
3670                 mbx->mb[i] = sp->u.iocb_cmd.u.mbx.out_mb[i];
3671 }
3672
3673 static void
3674 qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
3675 {
3676         sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
3677         qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
3678         ct_pkt->handle = sp->handle;
3679 }
3680
3681 static void qla2x00_send_notify_ack_iocb(srb_t *sp,
3682         struct nack_to_isp *nack)
3683 {
3684         struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
3685
3686         nack->entry_type = NOTIFY_ACK_TYPE;
3687         nack->entry_count = 1;
3688         nack->ox_id = ntfy->ox_id;
3689
3690         nack->u.isp24.handle = sp->handle;
3691         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3692         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3693                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3694                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3695         }
3696         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3697         nack->u.isp24.status = ntfy->u.isp24.status;
3698         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3699         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3700         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3701         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3702         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3703         nack->u.isp24.srr_flags = 0;
3704         nack->u.isp24.srr_reject_code = 0;
3705         nack->u.isp24.srr_reject_code_expl = 0;
3706         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3707
3708         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
3709             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP) &&
3710             sp->vha->hw->flags.edif_enabled) {
3711                 ql_dbg(ql_dbg_disc, sp->vha, 0x3074,
3712                     "%s PLOGI NACK sent with FC SECURITY bit, hdl=%x, loopid=%x, to pid %06x\n",
3713                     sp->name, sp->handle, sp->fcport->loop_id,
3714                     sp->fcport->d_id.b24);
3715                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
3716         }
3717 }
3718
3719 /*
3720  * Build NVME LS request
3721  */
3722 static void
3723 qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
3724 {
3725         struct srb_iocb *nvme;
3726
3727         nvme = &sp->u.iocb_cmd;
3728         cmd_pkt->entry_type = PT_LS4_REQUEST;
3729         cmd_pkt->entry_count = 1;
3730         cmd_pkt->control_flags = cpu_to_le16(CF_LS4_ORIGINATOR << CF_LS4_SHIFT);
3731
3732         cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
3733         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3734         cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
3735
3736         cmd_pkt->tx_dseg_count = cpu_to_le16(1);
3737         cmd_pkt->tx_byte_count = cpu_to_le32(nvme->u.nvme.cmd_len);
3738         cmd_pkt->dsd[0].length = cpu_to_le32(nvme->u.nvme.cmd_len);
3739         put_unaligned_le64(nvme->u.nvme.cmd_dma, &cmd_pkt->dsd[0].address);
3740
3741         cmd_pkt->rx_dseg_count = cpu_to_le16(1);
3742         cmd_pkt->rx_byte_count = cpu_to_le32(nvme->u.nvme.rsp_len);
3743         cmd_pkt->dsd[1].length = cpu_to_le32(nvme->u.nvme.rsp_len);
3744         put_unaligned_le64(nvme->u.nvme.rsp_dma, &cmd_pkt->dsd[1].address);
3745 }
3746
3747 static void
3748 qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
3749 {
3750         int map, pos;
3751
3752         vce->entry_type = VP_CTRL_IOCB_TYPE;
3753         vce->handle = sp->handle;
3754         vce->entry_count = 1;
3755         vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
3756         vce->vp_count = cpu_to_le16(1);
3757
3758         /*
3759          * index map in firmware starts with 1; decrement index
3760          * this is ok as we never use index 0
3761          */
3762         map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
3763         pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
3764         vce->vp_idx_map[map] |= 1 << pos;
3765 }
3766
3767 static void
3768 qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
3769 {
3770         logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
3771         logio->control_flags =
3772             cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
3773
3774         logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3775         logio->port_id[0] = sp->fcport->d_id.b.al_pa;
3776         logio->port_id[1] = sp->fcport->d_id.b.area;
3777         logio->port_id[2] = sp->fcport->d_id.b.domain;
3778         logio->vp_index = sp->fcport->vha->vp_idx;
3779 }
3780
3781 int
3782 qla2x00_start_sp(srb_t *sp)
3783 {
3784         int rval = QLA_SUCCESS;
3785         scsi_qla_host_t *vha = sp->vha;
3786         struct qla_hw_data *ha = vha->hw;
3787         struct qla_qpair *qp = sp->qpair;
3788         void *pkt;
3789         unsigned long flags;
3790
3791         if (vha->hw->flags.eeh_busy)
3792                 return -EIO;
3793
3794         spin_lock_irqsave(qp->qp_lock_ptr, flags);
3795         pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
3796         if (!pkt) {
3797                 rval = EAGAIN;
3798                 ql_log(ql_log_warn, vha, 0x700c,
3799                     "qla2x00_alloc_iocbs failed.\n");
3800                 goto done;
3801         }
3802
3803         switch (sp->type) {
3804         case SRB_LOGIN_CMD:
3805                 IS_FWI2_CAPABLE(ha) ?
3806                     qla24xx_login_iocb(sp, pkt) :
3807                     qla2x00_login_iocb(sp, pkt);
3808                 break;
3809         case SRB_PRLI_CMD:
3810                 qla24xx_prli_iocb(sp, pkt);
3811                 break;
3812         case SRB_LOGOUT_CMD:
3813                 IS_FWI2_CAPABLE(ha) ?
3814                     qla24xx_logout_iocb(sp, pkt) :
3815                     qla2x00_logout_iocb(sp, pkt);
3816                 break;
3817         case SRB_ELS_CMD_RPT:
3818         case SRB_ELS_CMD_HST:
3819                 qla24xx_els_iocb(sp, pkt);
3820                 break;
3821         case SRB_ELS_CMD_HST_NOLOGIN:
3822                 qla_els_pt_iocb(sp->vha, pkt,  &sp->u.bsg_cmd.u.els_arg);
3823                 ((struct els_entry_24xx *)pkt)->handle = sp->handle;
3824                 break;
3825         case SRB_CT_CMD:
3826                 IS_FWI2_CAPABLE(ha) ?
3827                     qla24xx_ct_iocb(sp, pkt) :
3828                     qla2x00_ct_iocb(sp, pkt);
3829                 break;
3830         case SRB_ADISC_CMD:
3831                 IS_FWI2_CAPABLE(ha) ?
3832                     qla24xx_adisc_iocb(sp, pkt) :
3833                     qla2x00_adisc_iocb(sp, pkt);
3834                 break;
3835         case SRB_TM_CMD:
3836                 IS_QLAFX00(ha) ?
3837                     qlafx00_tm_iocb(sp, pkt) :
3838                     qla24xx_tm_iocb(sp, pkt);
3839                 break;
3840         case SRB_FXIOCB_DCMD:
3841         case SRB_FXIOCB_BCMD:
3842                 qlafx00_fxdisc_iocb(sp, pkt);
3843                 break;
3844         case SRB_NVME_LS:
3845                 qla_nvme_ls(sp, pkt);
3846                 break;
3847         case SRB_ABT_CMD:
3848                 IS_QLAFX00(ha) ?
3849                         qlafx00_abort_iocb(sp, pkt) :
3850                         qla24xx_abort_iocb(sp, pkt);
3851                 break;
3852         case SRB_ELS_DCMD:
3853                 qla24xx_els_logo_iocb(sp, pkt);
3854                 break;
3855         case SRB_CT_PTHRU_CMD:
3856                 qla2x00_ctpthru_cmd_iocb(sp, pkt);
3857                 break;
3858         case SRB_MB_IOCB:
3859                 qla2x00_mb_iocb(sp, pkt);
3860                 break;
3861         case SRB_NACK_PLOGI:
3862         case SRB_NACK_PRLI:
3863         case SRB_NACK_LOGO:
3864                 qla2x00_send_notify_ack_iocb(sp, pkt);
3865                 break;
3866         case SRB_CTRL_VP:
3867                 qla25xx_ctrlvp_iocb(sp, pkt);
3868                 break;
3869         case SRB_PRLO_CMD:
3870                 qla24xx_prlo_iocb(sp, pkt);
3871                 break;
3872         case SRB_SA_UPDATE:
3873                 qla24xx_sa_update_iocb(sp, pkt);
3874                 break;
3875         case SRB_SA_REPLACE:
3876                 qla24xx_sa_replace_iocb(sp, pkt);
3877                 break;
3878         default:
3879                 break;
3880         }
3881
3882         if (sp->start_timer)
3883                 add_timer(&sp->u.iocb_cmd.timer);
3884
3885         wmb();
3886         qla2x00_start_iocbs(vha, qp->req);
3887 done:
3888         spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
3889         return rval;
3890 }
3891
3892 static void
3893 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
3894                                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
3895 {
3896         uint16_t avail_dsds;
3897         struct dsd64 *cur_dsd;
3898         uint32_t req_data_len = 0;
3899         uint32_t rsp_data_len = 0;
3900         struct scatterlist *sg;
3901         int index;
3902         int entry_count = 1;
3903         struct bsg_job *bsg_job = sp->u.bsg_job;
3904
3905         /*Update entry type to indicate bidir command */
3906         put_unaligned_le32(COMMAND_BIDIRECTIONAL, &cmd_pkt->entry_type);
3907
3908         /* Set the transfer direction, in this set both flags
3909          * Also set the BD_WRAP_BACK flag, firmware will take care
3910          * assigning DID=SID for outgoing pkts.
3911          */
3912         cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3913         cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3914         cmd_pkt->control_flags = cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
3915                                                         BD_WRAP_BACK);
3916
3917         req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
3918         cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
3919         cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
3920         cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
3921
3922         vha->bidi_stats.transfer_bytes += req_data_len;
3923         vha->bidi_stats.io_count++;
3924
3925         vha->qla_stats.output_bytes += req_data_len;
3926         vha->qla_stats.output_requests++;
3927
3928         /* Only one dsd is available for bidirectional IOCB, remaining dsds
3929          * are bundled in continuation iocb
3930          */
3931         avail_dsds = 1;
3932         cur_dsd = &cmd_pkt->fcp_dsd;
3933
3934         index = 0;
3935
3936         for_each_sg(bsg_job->request_payload.sg_list, sg,
3937                                 bsg_job->request_payload.sg_cnt, index) {
3938                 cont_a64_entry_t *cont_pkt;
3939
3940                 /* Allocate additional continuation packets */
3941                 if (avail_dsds == 0) {
3942                         /* Continuation type 1 IOCB can accomodate
3943                          * 5 DSDS
3944                          */
3945                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3946                         cur_dsd = cont_pkt->dsd;
3947                         avail_dsds = 5;
3948                         entry_count++;
3949                 }
3950                 append_dsd64(&cur_dsd, sg);
3951                 avail_dsds--;
3952         }
3953         /* For read request DSD will always goes to continuation IOCB
3954          * and follow the write DSD. If there is room on the current IOCB
3955          * then it is added to that IOCB else new continuation IOCB is
3956          * allocated.
3957          */
3958         for_each_sg(bsg_job->reply_payload.sg_list, sg,
3959                                 bsg_job->reply_payload.sg_cnt, index) {
3960                 cont_a64_entry_t *cont_pkt;
3961
3962                 /* Allocate additional continuation packets */
3963                 if (avail_dsds == 0) {
3964                         /* Continuation type 1 IOCB can accomodate
3965                          * 5 DSDS
3966                          */
3967                         cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
3968                         cur_dsd = cont_pkt->dsd;
3969                         avail_dsds = 5;
3970                         entry_count++;
3971                 }
3972                 append_dsd64(&cur_dsd, sg);
3973                 avail_dsds--;
3974         }
3975         /* This value should be same as number of IOCB required for this cmd */
3976         cmd_pkt->entry_count = entry_count;
3977 }
3978
3979 int
3980 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
3981 {
3982
3983         struct qla_hw_data *ha = vha->hw;
3984         unsigned long flags;
3985         uint32_t handle;
3986         uint16_t req_cnt;
3987         uint16_t cnt;
3988         uint32_t *clr_ptr;
3989         struct cmd_bidir *cmd_pkt = NULL;
3990         struct rsp_que *rsp;
3991         struct req_que *req;
3992         int rval = EXT_STATUS_OK;
3993
3994         rval = QLA_SUCCESS;
3995
3996         rsp = ha->rsp_q_map[0];
3997         req = vha->req;
3998
3999         /* Send marker if required */
4000         if (vha->marker_needed != 0) {
4001                 if (qla2x00_marker(vha, ha->base_qpair,
4002                         0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
4003                         return EXT_STATUS_MAILBOX;
4004                 vha->marker_needed = 0;
4005         }
4006
4007         /* Acquire ring specific lock */
4008         spin_lock_irqsave(&ha->hardware_lock, flags);
4009
4010         handle = qla2xxx_get_next_handle(req);
4011         if (handle == 0) {
4012                 rval = EXT_STATUS_BUSY;
4013                 goto queuing_error;
4014         }
4015
4016         /* Calculate number of IOCB required */
4017         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
4018
4019         /* Check for room on request queue. */
4020         if (req->cnt < req_cnt + 2) {
4021                 if (IS_SHADOW_REG_CAPABLE(ha)) {
4022                         cnt = *req->out_ptr;
4023                 } else {
4024                         cnt = rd_reg_dword_relaxed(req->req_q_out);
4025                         if (qla2x00_check_reg16_for_disconnect(vha, cnt))
4026                                 goto queuing_error;
4027                 }
4028
4029                 if  (req->ring_index < cnt)
4030                         req->cnt = cnt - req->ring_index;
4031                 else
4032                         req->cnt = req->length -
4033                                 (req->ring_index - cnt);
4034         }
4035         if (req->cnt < req_cnt + 2) {
4036                 rval = EXT_STATUS_BUSY;
4037                 goto queuing_error;
4038         }
4039
4040         cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
4041         cmd_pkt->handle = make_handle(req->id, handle);
4042
4043         /* Zero out remaining portion of packet. */
4044         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
4045         clr_ptr = (uint32_t *)cmd_pkt + 2;
4046         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
4047
4048         /* Set NPORT-ID  (of vha)*/
4049         cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
4050         cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
4051         cmd_pkt->port_id[1] = vha->d_id.b.area;
4052         cmd_pkt->port_id[2] = vha->d_id.b.domain;
4053
4054         qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
4055         cmd_pkt->entry_status = (uint8_t) rsp->id;
4056         /* Build command packet. */
4057         req->current_outstanding_cmd = handle;
4058         req->outstanding_cmds[handle] = sp;
4059         sp->handle = handle;
4060         req->cnt -= req_cnt;
4061
4062         /* Send the command to the firmware */
4063         wmb();
4064         qla2x00_start_iocbs(vha, req);
4065 queuing_error:
4066         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4067
4068         return rval;
4069 }