linux/drivers/scsi/qla2xxx/qla_iocb.c
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   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 */
  20static inline uint16_t
  21qla2x00_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 */
  50uint16_t
  51qla2x00_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 */
  72uint16_t
  73qla2x00_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 */
  92static inline cont_entry_t *
  93qla2x00_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 */
 121static inline cont_a64_entry_t *
 122qla2x00_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
 144inline int
 145qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 146{
 147        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 148        uint8_t guard = scsi_host_get_guard(cmd->device->host);
 149
 150        /* We always use DIFF Bundling for best performance */
 151        *fw_prot_opts = 0;
 152
 153        /* Translate SCSI opcode to a protection opcode */
 154        switch (scsi_get_prot_op(cmd)) {
 155        case SCSI_PROT_READ_STRIP:
 156                *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 157                break;
 158        case SCSI_PROT_WRITE_INSERT:
 159                *fw_prot_opts |= PO_MODE_DIF_INSERT;
 160                break;
 161        case SCSI_PROT_READ_INSERT:
 162                *fw_prot_opts |= PO_MODE_DIF_INSERT;
 163                break;
 164        case SCSI_PROT_WRITE_STRIP:
 165                *fw_prot_opts |= PO_MODE_DIF_REMOVE;
 166                break;
 167        case SCSI_PROT_READ_PASS:
 168        case SCSI_PROT_WRITE_PASS:
 169                if (guard & SHOST_DIX_GUARD_IP)
 170                        *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
 171                else
 172                        *fw_prot_opts |= PO_MODE_DIF_PASS;
 173                break;
 174        default:        /* Normal Request */
 175                *fw_prot_opts |= PO_MODE_DIF_PASS;
 176                break;
 177        }
 178
 179        return scsi_prot_sg_count(cmd);
 180}
 181
 182/*
 183 * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 184 * capable IOCB types.
 185 *
 186 * @sp: SRB command to process
 187 * @cmd_pkt: Command type 2 IOCB
 188 * @tot_dsds: Total number of segments to transfer
 189 */
 190void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
 191    uint16_t tot_dsds)
 192{
 193        uint16_t        avail_dsds;
 194        struct dsd32    *cur_dsd;
 195        scsi_qla_host_t *vha;
 196        struct scsi_cmnd *cmd;
 197        struct scatterlist *sg;
 198        int i;
 199
 200        cmd = GET_CMD_SP(sp);
 201
 202        /* Update entry type to indicate Command Type 2 IOCB */
 203        put_unaligned_le32(COMMAND_TYPE, &cmd_pkt->entry_type);
 204
 205        /* No data transfer */
 206        if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 207                cmd_pkt->byte_count = cpu_to_le32(0);
 208                return;
 209        }
 210
 211        vha = sp->vha;
 212        cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 213
 214        /* Three DSDs are available in the Command Type 2 IOCB */
 215        avail_dsds = ARRAY_SIZE(cmd_pkt->dsd32);
 216        cur_dsd = cmd_pkt->dsd32;
 217
 218        /* Load data segments */
 219        scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 220                cont_entry_t *cont_pkt;
 221
 222                /* Allocate additional continuation packets? */
 223                if (avail_dsds == 0) {
 224                        /*
 225                         * Seven DSDs are available in the Continuation
 226                         * Type 0 IOCB.
 227                         */
 228                        cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
 229                        cur_dsd = cont_pkt->dsd;
 230                        avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 231                }
 232
 233                append_dsd32(&cur_dsd, sg);
 234                avail_dsds--;
 235        }
 236}
 237
 238/**
 239 * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 240 * capable IOCB types.
 241 *
 242 * @sp: SRB command to process
 243 * @cmd_pkt: Command type 3 IOCB
 244 * @tot_dsds: Total number of segments to transfer
 245 */
 246void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
 247    uint16_t tot_dsds)
 248{
 249        uint16_t        avail_dsds;
 250        struct dsd64    *cur_dsd;
 251        scsi_qla_host_t *vha;
 252        struct scsi_cmnd *cmd;
 253        struct scatterlist *sg;
 254        int i;
 255
 256        cmd = GET_CMD_SP(sp);
 257
 258        /* Update entry type to indicate Command Type 3 IOCB */
 259        put_unaligned_le32(COMMAND_A64_TYPE, &cmd_pkt->entry_type);
 260
 261        /* No data transfer */
 262        if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 263                cmd_pkt->byte_count = cpu_to_le32(0);
 264                return;
 265        }
 266
 267        vha = sp->vha;
 268        cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 269
 270        /* Two DSDs are available in the Command Type 3 IOCB */
 271        avail_dsds = ARRAY_SIZE(cmd_pkt->dsd64);
 272        cur_dsd = cmd_pkt->dsd64;
 273
 274        /* Load data segments */
 275        scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 276                cont_a64_entry_t *cont_pkt;
 277
 278                /* Allocate additional continuation packets? */
 279                if (avail_dsds == 0) {
 280                        /*
 281                         * Five DSDs are available in the Continuation
 282                         * Type 1 IOCB.
 283                         */
 284                        cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
 285                        cur_dsd = cont_pkt->dsd;
 286                        avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 287                }
 288
 289                append_dsd64(&cur_dsd, sg);
 290                avail_dsds--;
 291        }
 292}
 293
 294/*
 295 * Find the first handle that is not in use, starting from
 296 * req->current_outstanding_cmd + 1. The caller must hold the lock that is
 297 * associated with @req.
 298 */
 299uint32_t qla2xxx_get_next_handle(struct req_que *req)
 300{
 301        uint32_t index, handle = req->current_outstanding_cmd;
 302
 303        for (index = 1; index < req->num_outstanding_cmds; index++) {
 304                handle++;
 305                if (handle == req->num_outstanding_cmds)
 306                        handle = 1;
 307                if (!req->outstanding_cmds[handle])
 308                        return handle;
 309        }
 310
 311        return 0;
 312}
 313
 314/**
 315 * qla2x00_start_scsi() - Send a SCSI command to the ISP
 316 * @sp: command to send to the ISP
 317 *
 318 * Returns non-zero if a failure occurred, else zero.
 319 */
 320int
 321qla2x00_start_scsi(srb_t *sp)
 322{
 323        int             nseg;
 324        unsigned long   flags;
 325        scsi_qla_host_t *vha;
 326        struct scsi_cmnd *cmd;
 327        uint32_t        *clr_ptr;
 328        uint32_t        handle;
 329        cmd_entry_t     *cmd_pkt;
 330        uint16_t        cnt;
 331        uint16_t        req_cnt;
 332        uint16_t        tot_dsds;
 333        struct device_reg_2xxx __iomem *reg;
 334        struct qla_hw_data *ha;
 335        struct req_que *req;
 336        struct rsp_que *rsp;
 337
 338        /* Setup device pointers. */
 339        vha = sp->vha;
 340        ha = vha->hw;
 341        reg = &ha->iobase->isp;
 342        cmd = GET_CMD_SP(sp);
 343        req = ha->req_q_map[0];
 344        rsp = ha->rsp_q_map[0];
 345        /* So we know we haven't pci_map'ed anything yet */
 346        tot_dsds = 0;
 347
 348        /* Send marker if required */
 349        if (vha->marker_needed != 0) {
 350                if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
 351                    QLA_SUCCESS) {
 352                        return (QLA_FUNCTION_FAILED);
 353                }
 354                vha->marker_needed = 0;
 355        }
 356
 357        /* Acquire ring specific lock */
 358        spin_lock_irqsave(&ha->hardware_lock, flags);
 359
 360        handle = qla2xxx_get_next_handle(req);
 361        if (handle == 0)
 362                goto queuing_error;
 363
 364        /* Map the sg table so we have an accurate count of sg entries needed */
 365        if (scsi_sg_count(cmd)) {
 366                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
 367                    scsi_sg_count(cmd), cmd->sc_data_direction);
 368                if (unlikely(!nseg))
 369                        goto queuing_error;
 370        } else
 371                nseg = 0;
 372
 373        tot_dsds = nseg;
 374
 375        /* Calculate the number of request entries needed. */
 376        req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
 377        if (req->cnt < (req_cnt + 2)) {
 378                cnt = rd_reg_word_relaxed(ISP_REQ_Q_OUT(ha, reg));
 379                if (req->ring_index < cnt)
 380                        req->cnt = cnt - req->ring_index;
 381                else
 382                        req->cnt = req->length -
 383                            (req->ring_index - cnt);
 384                /* If still no head room then bail out */
 385                if (req->cnt < (req_cnt + 2))
 386                        goto queuing_error;
 387        }
 388
 389        /* Build command packet */
 390        req->current_outstanding_cmd = handle;
 391        req->outstanding_cmds[handle] = sp;
 392        sp->handle = handle;
 393        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
 394        req->cnt -= req_cnt;
 395
 396        cmd_pkt = (cmd_entry_t *)req->ring_ptr;
 397        cmd_pkt->handle = handle;
 398        /* Zero out remaining portion of packet. */
 399        clr_ptr = (uint32_t *)cmd_pkt + 2;
 400        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 401        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 402
 403        /* Set target ID and LUN number*/
 404        SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
 405        cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
 406        cmd_pkt->control_flags = cpu_to_le16(CF_SIMPLE_TAG);
 407
 408        /* Load SCSI command packet. */
 409        memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
 410        cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 411
 412        /* Build IOCB segments */
 413        ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 414
 415        /* Set total data segment count. */
 416        cmd_pkt->entry_count = (uint8_t)req_cnt;
 417        wmb();
 418
 419        /* Adjust ring index. */
 420        req->ring_index++;
 421        if (req->ring_index == req->length) {
 422                req->ring_index = 0;
 423                req->ring_ptr = req->ring;
 424        } else
 425                req->ring_ptr++;
 426
 427        sp->flags |= SRB_DMA_VALID;
 428
 429        /* Set chip new ring index. */
 430        wrt_reg_word(ISP_REQ_Q_IN(ha, reg), req->ring_index);
 431        rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
 432
 433        /* Manage unprocessed RIO/ZIO commands in response queue. */
 434        if (vha->flags.process_response_queue &&
 435            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
 436                qla2x00_process_response_queue(rsp);
 437
 438        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 439        return (QLA_SUCCESS);
 440
 441queuing_error:
 442        if (tot_dsds)
 443                scsi_dma_unmap(cmd);
 444
 445        spin_unlock_irqrestore(&ha->hardware_lock, flags);
 446
 447        return (QLA_FUNCTION_FAILED);
 448}
 449
 450/**
 451 * qla2x00_start_iocbs() - Execute the IOCB command
 452 * @vha: HA context
 453 * @req: request queue
 454 */
 455void
 456qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 457{
 458        struct qla_hw_data *ha = vha->hw;
 459        device_reg_t *reg = ISP_QUE_REG(ha, req->id);
 460
 461        if (IS_P3P_TYPE(ha)) {
 462                qla82xx_start_iocbs(vha);
 463        } else {
 464                /* Adjust ring index. */
 465                req->ring_index++;
 466                if (req->ring_index == req->length) {
 467                        req->ring_index = 0;
 468                        req->ring_ptr = req->ring;
 469                } else
 470                        req->ring_ptr++;
 471
 472                /* Set chip new ring index. */
 473                if (ha->mqenable || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
 474                        wrt_reg_dword(req->req_q_in, req->ring_index);
 475                } else if (IS_QLA83XX(ha)) {
 476                        wrt_reg_dword(req->req_q_in, req->ring_index);
 477                        rd_reg_dword_relaxed(&ha->iobase->isp24.hccr);
 478                } else if (IS_QLAFX00(ha)) {
 479                        wrt_reg_dword(&reg->ispfx00.req_q_in, req->ring_index);
 480                        rd_reg_dword_relaxed(&reg->ispfx00.req_q_in);
 481                        QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
 482                } else if (IS_FWI2_CAPABLE(ha)) {
 483                        wrt_reg_dword(&reg->isp24.req_q_in, req->ring_index);
 484                        rd_reg_dword_relaxed(&reg->isp24.req_q_in);
 485                } else {
 486                        wrt_reg_word(ISP_REQ_Q_IN(ha, &reg->isp),
 487                                req->ring_index);
 488                        rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, &reg->isp));
 489                }
 490        }
 491}
 492
 493/**
 494 * __qla2x00_marker() - Send a marker IOCB to the firmware.
 495 * @vha: HA context
 496 * @qpair: queue pair pointer
 497 * @loop_id: loop ID
 498 * @lun: LUN
 499 * @type: marker modifier
 500 *
 501 * Can be called from both normal and interrupt context.
 502 *
 503 * Returns non-zero if a failure occurred, else zero.
 504 */
 505static int
 506__qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 507    uint16_t loop_id, uint64_t lun, uint8_t type)
 508{
 509        mrk_entry_t *mrk;
 510        struct mrk_entry_24xx *mrk24 = NULL;
 511        struct req_que *req = qpair->req;
 512        struct qla_hw_data *ha = vha->hw;
 513        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 514
 515        mrk = (mrk_entry_t *)__qla2x00_alloc_iocbs(qpair, NULL);
 516        if (mrk == NULL) {
 517                ql_log(ql_log_warn, base_vha, 0x3026,
 518                    "Failed to allocate Marker IOCB.\n");
 519
 520                return (QLA_FUNCTION_FAILED);
 521        }
 522
 523        mrk->entry_type = MARKER_TYPE;
 524        mrk->modifier = type;
 525        if (type != MK_SYNC_ALL) {
 526                if (IS_FWI2_CAPABLE(ha)) {
 527                        mrk24 = (struct mrk_entry_24xx *) mrk;
 528                        mrk24->nport_handle = cpu_to_le16(loop_id);
 529                        int_to_scsilun(lun, (struct scsi_lun *)&mrk24->lun);
 530                        host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
 531                        mrk24->vp_index = vha->vp_idx;
 532                        mrk24->handle = make_handle(req->id, mrk24->handle);
 533                } else {
 534                        SET_TARGET_ID(ha, mrk->target, loop_id);
 535                        mrk->lun = cpu_to_le16((uint16_t)lun);
 536                }
 537        }
 538        wmb();
 539
 540        qla2x00_start_iocbs(vha, req);
 541
 542        return (QLA_SUCCESS);
 543}
 544
 545int
 546qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
 547    uint16_t loop_id, uint64_t lun, uint8_t type)
 548{
 549        int ret;
 550        unsigned long flags = 0;
 551
 552        spin_lock_irqsave(qpair->qp_lock_ptr, flags);
 553        ret = __qla2x00_marker(vha, qpair, loop_id, lun, type);
 554        spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
 555
 556        return (ret);
 557}
 558
 559/*
 560 * qla2x00_issue_marker
 561 *
 562 * Issue marker
 563 * Caller CAN have hardware lock held as specified by ha_locked parameter.
 564 * Might release it, then reaquire.
 565 */
 566int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 567{
 568        if (ha_locked) {
 569                if (__qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 570                                        MK_SYNC_ALL) != QLA_SUCCESS)
 571                        return QLA_FUNCTION_FAILED;
 572        } else {
 573                if (qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
 574                                        MK_SYNC_ALL) != QLA_SUCCESS)
 575                        return QLA_FUNCTION_FAILED;
 576        }
 577        vha->marker_needed = 0;
 578
 579        return QLA_SUCCESS;
 580}
 581
 582static inline int
 583qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
 584        uint16_t tot_dsds)
 585{
 586        struct dsd64 *cur_dsd = NULL, *next_dsd;
 587        scsi_qla_host_t *vha;
 588        struct qla_hw_data *ha;
 589        struct scsi_cmnd *cmd;
 590        struct  scatterlist *cur_seg;
 591        uint8_t avail_dsds;
 592        uint8_t first_iocb = 1;
 593        uint32_t dsd_list_len;
 594        struct dsd_dma *dsd_ptr;
 595        struct ct6_dsd *ctx;
 596        struct qla_qpair *qpair = sp->qpair;
 597
 598        cmd = GET_CMD_SP(sp);
 599
 600        /* Update entry type to indicate Command Type 3 IOCB */
 601        put_unaligned_le32(COMMAND_TYPE_6, &cmd_pkt->entry_type);
 602
 603        /* No data transfer */
 604        if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 605                cmd_pkt->byte_count = cpu_to_le32(0);
 606                return 0;
 607        }
 608
 609        vha = sp->vha;
 610        ha = vha->hw;
 611
 612        /* Set transfer direction */
 613        if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 614                cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
 615                qpair->counters.output_bytes += scsi_bufflen(cmd);
 616                qpair->counters.output_requests++;
 617        } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 618                cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
 619                qpair->counters.input_bytes += scsi_bufflen(cmd);
 620                qpair->counters.input_requests++;
 621        }
 622
 623        cur_seg = scsi_sglist(cmd);
 624        ctx = sp->u.scmd.ct6_ctx;
 625
 626        while (tot_dsds) {
 627                avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
 628                    QLA_DSDS_PER_IOCB : tot_dsds;
 629                tot_dsds -= avail_dsds;
 630                dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
 631
 632                dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
 633                    struct dsd_dma, list);
 634                next_dsd = dsd_ptr->dsd_addr;
 635                list_del(&dsd_ptr->list);
 636                ha->gbl_dsd_avail--;
 637                list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
 638                ctx->dsd_use_cnt++;
 639                ha->gbl_dsd_inuse++;
 640
 641                if (first_iocb) {
 642                        first_iocb = 0;
 643                        put_unaligned_le64(dsd_ptr->dsd_list_dma,
 644                                           &cmd_pkt->fcp_dsd.address);
 645                        cmd_pkt->fcp_dsd.length = cpu_to_le32(dsd_list_len);
 646                } else {
 647                        put_unaligned_le64(dsd_ptr->dsd_list_dma,
 648                                           &cur_dsd->address);
 649                        cur_dsd->length = cpu_to_le32(dsd_list_len);
 650                        cur_dsd++;
 651                }
 652                cur_dsd = next_dsd;
 653                while (avail_dsds) {
 654                        append_dsd64(&cur_dsd, cur_seg);
 655                        cur_seg = sg_next(cur_seg);
 656                        avail_dsds--;
 657                }
 658        }
 659
 660        /* Null termination */
 661        cur_dsd->address = 0;
 662        cur_dsd->length = 0;
 663        cur_dsd++;
 664        cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
 665        return 0;
 666}
 667
 668/*
 669 * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 670 * for Command Type 6.
 671 *
 672 * @dsds: number of data segment descriptors needed
 673 *
 674 * Returns the number of dsd list needed to store @dsds.
 675 */
 676static inline uint16_t
 677qla24xx_calc_dsd_lists(uint16_t dsds)
 678{
 679        uint16_t dsd_lists = 0;
 680
 681        dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
 682        if (dsds % QLA_DSDS_PER_IOCB)
 683                dsd_lists++;
 684        return dsd_lists;
 685}
 686
 687
 688/**
 689 * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 690 * IOCB types.
 691 *
 692 * @sp: SRB command to process
 693 * @cmd_pkt: Command type 3 IOCB
 694 * @tot_dsds: Total number of segments to transfer
 695 * @req: pointer to request queue
 696 */
 697inline void
 698qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 699        uint16_t tot_dsds, struct req_que *req)
 700{
 701        uint16_t        avail_dsds;
 702        struct dsd64    *cur_dsd;
 703        scsi_qla_host_t *vha;
 704        struct scsi_cmnd *cmd;
 705        struct scatterlist *sg;
 706        int i;
 707        struct qla_qpair *qpair = sp->qpair;
 708
 709        cmd = GET_CMD_SP(sp);
 710
 711        /* Update entry type to indicate Command Type 3 IOCB */
 712        put_unaligned_le32(COMMAND_TYPE_7, &cmd_pkt->entry_type);
 713
 714        /* No data transfer */
 715        if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
 716                cmd_pkt->byte_count = cpu_to_le32(0);
 717                return;
 718        }
 719
 720        vha = sp->vha;
 721
 722        /* Set transfer direction */
 723        if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 724                cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_WRITE_DATA);
 725                qpair->counters.output_bytes += scsi_bufflen(cmd);
 726                qpair->counters.output_requests++;
 727        } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 728                cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_READ_DATA);
 729                qpair->counters.input_bytes += scsi_bufflen(cmd);
 730                qpair->counters.input_requests++;
 731        }
 732
 733        /* One DSD is available in the Command Type 3 IOCB */
 734        avail_dsds = 1;
 735        cur_dsd = &cmd_pkt->dsd;
 736
 737        /* Load data segments */
 738
 739        scsi_for_each_sg(cmd, sg, tot_dsds, i) {
 740                cont_a64_entry_t *cont_pkt;
 741
 742                /* Allocate additional continuation packets? */
 743                if (avail_dsds == 0) {
 744                        /*
 745                         * Five DSDs are available in the Continuation
 746                         * Type 1 IOCB.
 747                         */
 748                        cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
 749                        cur_dsd = cont_pkt->dsd;
 750                        avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
 751                }
 752
 753                append_dsd64(&cur_dsd, sg);
 754                avail_dsds--;
 755        }
 756}
 757
 758struct fw_dif_context {
 759        __le32  ref_tag;
 760        __le16  app_tag;
 761        uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
 762        uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
 763};
 764
 765/*
 766 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 767 *
 768 */
 769static inline void
 770qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 771    unsigned int protcnt)
 772{
 773        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 774
 775        switch (scsi_get_prot_type(cmd)) {
 776        case SCSI_PROT_DIF_TYPE0:
 777                /*
 778                 * No check for ql2xenablehba_err_chk, as it would be an
 779                 * I/O error if hba tag generation is not done.
 780                 */
 781                pkt->ref_tag = cpu_to_le32((uint32_t)
 782                    (0xffffffff & scsi_get_lba(cmd)));
 783
 784                if (!qla2x00_hba_err_chk_enabled(sp))
 785                        break;
 786
 787                pkt->ref_tag_mask[0] = 0xff;
 788                pkt->ref_tag_mask[1] = 0xff;
 789                pkt->ref_tag_mask[2] = 0xff;
 790                pkt->ref_tag_mask[3] = 0xff;
 791                break;
 792
 793        /*
 794         * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
 795         * match LBA in CDB + N
 796         */
 797        case SCSI_PROT_DIF_TYPE2:
 798                pkt->app_tag = cpu_to_le16(0);
 799                pkt->app_tag_mask[0] = 0x0;
 800                pkt->app_tag_mask[1] = 0x0;
 801
 802                pkt->ref_tag = cpu_to_le32((uint32_t)
 803                    (0xffffffff & scsi_get_lba(cmd)));
 804
 805                if (!qla2x00_hba_err_chk_enabled(sp))
 806                        break;
 807
 808                /* enable ALL bytes of the ref tag */
 809                pkt->ref_tag_mask[0] = 0xff;
 810                pkt->ref_tag_mask[1] = 0xff;
 811                pkt->ref_tag_mask[2] = 0xff;
 812                pkt->ref_tag_mask[3] = 0xff;
 813                break;
 814
 815        /* For Type 3 protection: 16 bit GUARD only */
 816        case SCSI_PROT_DIF_TYPE3:
 817                pkt->ref_tag_mask[0] = pkt->ref_tag_mask[1] =
 818                        pkt->ref_tag_mask[2] = pkt->ref_tag_mask[3] =
 819                                                                0x00;
 820                break;
 821
 822        /*
 823         * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
 824         * 16 bit app tag.
 825         */
 826        case SCSI_PROT_DIF_TYPE1:
 827                pkt->ref_tag = cpu_to_le32((uint32_t)
 828                    (0xffffffff & scsi_get_lba(cmd)));
 829                pkt->app_tag = cpu_to_le16(0);
 830                pkt->app_tag_mask[0] = 0x0;
 831                pkt->app_tag_mask[1] = 0x0;
 832
 833                if (!qla2x00_hba_err_chk_enabled(sp))
 834                        break;
 835
 836                /* enable ALL bytes of the ref tag */
 837                pkt->ref_tag_mask[0] = 0xff;
 838                pkt->ref_tag_mask[1] = 0xff;
 839                pkt->ref_tag_mask[2] = 0xff;
 840                pkt->ref_tag_mask[3] = 0xff;
 841                break;
 842        }
 843}
 844
 845int
 846qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 847        uint32_t *partial)
 848{
 849        struct scatterlist *sg;
 850        uint32_t cumulative_partial, sg_len;
 851        dma_addr_t sg_dma_addr;
 852
 853        if (sgx->num_bytes == sgx->tot_bytes)
 854                return 0;
 855
 856        sg = sgx->cur_sg;
 857        cumulative_partial = sgx->tot_partial;
 858
 859        sg_dma_addr = sg_dma_address(sg);
 860        sg_len = sg_dma_len(sg);
 861
 862        sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 863
 864        if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
 865                sgx->dma_len = (blk_sz - cumulative_partial);
 866                sgx->tot_partial = 0;
 867                sgx->num_bytes += blk_sz;
 868                *partial = 0;
 869        } else {
 870                sgx->dma_len = sg_len - sgx->bytes_consumed;
 871                sgx->tot_partial += sgx->dma_len;
 872                *partial = 1;
 873        }
 874
 875        sgx->bytes_consumed += sgx->dma_len;
 876
 877        if (sg_len == sgx->bytes_consumed) {
 878                sg = sg_next(sg);
 879                sgx->num_sg++;
 880                sgx->cur_sg = sg;
 881                sgx->bytes_consumed = 0;
 882        }
 883
 884        return 1;
 885}
 886
 887int
 888qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
 889        struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 890{
 891        void *next_dsd;
 892        uint8_t avail_dsds = 0;
 893        uint32_t dsd_list_len;
 894        struct dsd_dma *dsd_ptr;
 895        struct scatterlist *sg_prot;
 896        struct dsd64 *cur_dsd = dsd;
 897        uint16_t        used_dsds = tot_dsds;
 898        uint32_t        prot_int; /* protection interval */
 899        uint32_t        partial;
 900        struct qla2_sgx sgx;
 901        dma_addr_t      sle_dma;
 902        uint32_t        sle_dma_len, tot_prot_dma_len = 0;
 903        struct scsi_cmnd *cmd;
 904
 905        memset(&sgx, 0, sizeof(struct qla2_sgx));
 906        if (sp) {
 907                cmd = GET_CMD_SP(sp);
 908                prot_int = cmd->device->sector_size;
 909
 910                sgx.tot_bytes = scsi_bufflen(cmd);
 911                sgx.cur_sg = scsi_sglist(cmd);
 912                sgx.sp = sp;
 913
 914                sg_prot = scsi_prot_sglist(cmd);
 915        } else if (tc) {
 916                prot_int      = tc->blk_sz;
 917                sgx.tot_bytes = tc->bufflen;
 918                sgx.cur_sg    = tc->sg;
 919                sg_prot       = tc->prot_sg;
 920        } else {
 921                BUG();
 922                return 1;
 923        }
 924
 925        while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 926
 927                sle_dma = sgx.dma_addr;
 928                sle_dma_len = sgx.dma_len;
 929alloc_and_fill:
 930                /* Allocate additional continuation packets? */
 931                if (avail_dsds == 0) {
 932                        avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
 933                                        QLA_DSDS_PER_IOCB : used_dsds;
 934                        dsd_list_len = (avail_dsds + 1) * 12;
 935                        used_dsds -= avail_dsds;
 936
 937                        /* allocate tracking DS */
 938                        dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
 939                        if (!dsd_ptr)
 940                                return 1;
 941
 942                        /* allocate new list */
 943                        dsd_ptr->dsd_addr = next_dsd =
 944                            dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
 945                                &dsd_ptr->dsd_list_dma);
 946
 947                        if (!next_dsd) {
 948                                /*
 949                                 * Need to cleanup only this dsd_ptr, rest
 950                                 * will be done by sp_free_dma()
 951                                 */
 952                                kfree(dsd_ptr);
 953                                return 1;
 954                        }
 955
 956                        if (sp) {
 957                                list_add_tail(&dsd_ptr->list,
 958                                              &sp->u.scmd.crc_ctx->dsd_list);
 959
 960                                sp->flags |= SRB_CRC_CTX_DSD_VALID;
 961                        } else {
 962                                list_add_tail(&dsd_ptr->list,
 963                                    &(tc->ctx->dsd_list));
 964                                *tc->ctx_dsd_alloced = 1;
 965                        }
 966
 967
 968                        /* add new list to cmd iocb or last list */
 969                        put_unaligned_le64(dsd_ptr->dsd_list_dma,
 970                                           &cur_dsd->address);
 971                        cur_dsd->length = cpu_to_le32(dsd_list_len);
 972                        cur_dsd = next_dsd;
 973                }
 974                put_unaligned_le64(sle_dma, &cur_dsd->address);
 975                cur_dsd->length = cpu_to_le32(sle_dma_len);
 976                cur_dsd++;
 977                avail_dsds--;
 978
 979                if (partial == 0) {
 980                        /* Got a full protection interval */
 981                        sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
 982                        sle_dma_len = 8;
 983
 984                        tot_prot_dma_len += sle_dma_len;
 985                        if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
 986                                tot_prot_dma_len = 0;
 987                                sg_prot = sg_next(sg_prot);
 988                        }
 989
 990                        partial = 1; /* So as to not re-enter this block */
 991                        goto alloc_and_fill;
 992                }
 993        }
 994        /* Null termination */
 995        cur_dsd->address = 0;
 996        cur_dsd->length = 0;
 997        cur_dsd++;
 998        return 0;
 999}
1000
1001int
1002qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp,
1003        struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
1004{
1005        void *next_dsd;
1006        uint8_t avail_dsds = 0;
1007        uint32_t dsd_list_len;
1008        struct dsd_dma *dsd_ptr;
1009        struct scatterlist *sg, *sgl;
1010        struct dsd64 *cur_dsd = dsd;
1011        int     i;
1012        uint16_t        used_dsds = tot_dsds;
1013        struct scsi_cmnd *cmd;
1014
1015        if (sp) {
1016                cmd = GET_CMD_SP(sp);
1017                sgl = scsi_sglist(cmd);
1018        } else if (tc) {
1019                sgl = tc->sg;
1020        } else {
1021                BUG();
1022                return 1;
1023        }
1024
1025
1026        for_each_sg(sgl, sg, tot_dsds, i) {
1027                /* Allocate additional continuation packets? */
1028                if (avail_dsds == 0) {
1029                        avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1030                                        QLA_DSDS_PER_IOCB : used_dsds;
1031                        dsd_list_len = (avail_dsds + 1) * 12;
1032                        used_dsds -= avail_dsds;
1033
1034                        /* allocate tracking DS */
1035                        dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
1036                        if (!dsd_ptr)
1037                                return 1;
1038
1039                        /* allocate new list */
1040                        dsd_ptr->dsd_addr = next_dsd =
1041                            dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1042                                &dsd_ptr->dsd_list_dma);
1043
1044                        if (!next_dsd) {
1045                                /*
1046                                 * Need to cleanup only this dsd_ptr, rest
1047                                 * will be done by sp_free_dma()
1048                                 */
1049                                kfree(dsd_ptr);
1050                                return 1;
1051                        }
1052
1053                        if (sp) {
1054                                list_add_tail(&dsd_ptr->list,
1055                                              &sp->u.scmd.crc_ctx->dsd_list);
1056
1057                                sp->flags |= SRB_CRC_CTX_DSD_VALID;
1058                        } else {
1059                                list_add_tail(&dsd_ptr->list,
1060                                    &(tc->ctx->dsd_list));
1061                                *tc->ctx_dsd_alloced = 1;
1062                        }
1063
1064                        /* add new list to cmd iocb or last list */
1065                        put_unaligned_le64(dsd_ptr->dsd_list_dma,
1066                                           &cur_dsd->address);
1067                        cur_dsd->length = cpu_to_le32(dsd_list_len);
1068                        cur_dsd = next_dsd;
1069                }
1070                append_dsd64(&cur_dsd, sg);
1071                avail_dsds--;
1072
1073        }
1074        /* Null termination */
1075        cur_dsd->address = 0;
1076        cur_dsd->length = 0;
1077        cur_dsd++;
1078        return 0;
1079}
1080
1081int
1082qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
1083        struct dsd64 *cur_dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
1084{
1085        struct dsd_dma *dsd_ptr = NULL, *dif_dsd, *nxt_dsd;
1086        struct scatterlist *sg, *sgl;
1087        struct crc_context *difctx = NULL;
1088        struct scsi_qla_host *vha;
1089        uint dsd_list_len;
1090        uint avail_dsds = 0;
1091        uint used_dsds = tot_dsds;
1092        bool dif_local_dma_alloc = false;
1093        bool direction_to_device = false;
1094        int i;
1095
1096        if (sp) {
1097                struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1098
1099                sgl = scsi_prot_sglist(cmd);
1100                vha = sp->vha;
1101                difctx = sp->u.scmd.crc_ctx;
1102                direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
1103                ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1104                  "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
1105                        __func__, cmd, difctx, sp);
1106        } else if (tc) {
1107                vha = tc->vha;
1108                sgl = tc->prot_sg;
1109                difctx = tc->ctx;
1110                direction_to_device = tc->dma_data_direction == DMA_TO_DEVICE;
1111        } else {
1112                BUG();
1113                return 1;
1114        }
1115
1116        ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
1117            "%s: enter (write=%u)\n", __func__, direction_to_device);
1118
1119        /* if initiator doing write or target doing read */
1120        if (direction_to_device) {
1121                for_each_sg(sgl, sg, tot_dsds, i) {
1122                        u64 sle_phys = sg_phys(sg);
1123
1124                        /* If SGE addr + len flips bits in upper 32-bits */
1125                        if (MSD(sle_phys + sg->length) ^ MSD(sle_phys)) {
1126                                ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe022,
1127                                    "%s: page boundary crossing (phys=%llx len=%x)\n",
1128                                    __func__, sle_phys, sg->length);
1129
1130                                if (difctx) {
1131                                        ha->dif_bundle_crossed_pages++;
1132                                        dif_local_dma_alloc = true;
1133                                } else {
1134                                        ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1135                                            vha, 0xe022,
1136                                            "%s: difctx pointer is NULL\n",
1137                                            __func__);
1138                                }
1139                                break;
1140                        }
1141                }
1142                ha->dif_bundle_writes++;
1143        } else {
1144                ha->dif_bundle_reads++;
1145        }
1146
1147        if (ql2xdifbundlinginternalbuffers)
1148                dif_local_dma_alloc = direction_to_device;
1149
1150        if (dif_local_dma_alloc) {
1151                u32 track_difbundl_buf = 0;
1152                u32 ldma_sg_len = 0;
1153                u8 ldma_needed = 1;
1154
1155                difctx->no_dif_bundl = 0;
1156                difctx->dif_bundl_len = 0;
1157
1158                /* Track DSD buffers */
1159                INIT_LIST_HEAD(&difctx->ldif_dsd_list);
1160                /* Track local DMA buffers */
1161                INIT_LIST_HEAD(&difctx->ldif_dma_hndl_list);
1162
1163                for_each_sg(sgl, sg, tot_dsds, i) {
1164                        u32 sglen = sg_dma_len(sg);
1165
1166                        ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe023,
1167                            "%s: sg[%x] (phys=%llx sglen=%x) ldma_sg_len: %x dif_bundl_len: %x ldma_needed: %x\n",
1168                            __func__, i, (u64)sg_phys(sg), sglen, ldma_sg_len,
1169                            difctx->dif_bundl_len, ldma_needed);
1170
1171                        while (sglen) {
1172                                u32 xfrlen = 0;
1173
1174                                if (ldma_needed) {
1175                                        /*
1176                                         * Allocate list item to store
1177                                         * the DMA buffers
1178                                         */
1179                                        dsd_ptr = kzalloc(sizeof(*dsd_ptr),
1180                                            GFP_ATOMIC);
1181                                        if (!dsd_ptr) {
1182                                                ql_dbg(ql_dbg_tgt, vha, 0xe024,
1183                                                    "%s: failed alloc dsd_ptr\n",
1184                                                    __func__);
1185                                                return 1;
1186                                        }
1187                                        ha->dif_bundle_kallocs++;
1188
1189                                        /* allocate dma buffer */
1190                                        dsd_ptr->dsd_addr = dma_pool_alloc
1191                                                (ha->dif_bundl_pool, GFP_ATOMIC,
1192                                                 &dsd_ptr->dsd_list_dma);
1193                                        if (!dsd_ptr->dsd_addr) {
1194                                                ql_dbg(ql_dbg_tgt, vha, 0xe024,
1195                                                    "%s: failed alloc ->dsd_ptr\n",
1196                                                    __func__);
1197                                                /*
1198                                                 * need to cleanup only this
1199                                                 * dsd_ptr rest will be done
1200                                                 * by sp_free_dma()
1201                                                 */
1202                                                kfree(dsd_ptr);
1203                                                ha->dif_bundle_kallocs--;
1204                                                return 1;
1205                                        }
1206                                        ha->dif_bundle_dma_allocs++;
1207                                        ldma_needed = 0;
1208                                        difctx->no_dif_bundl++;
1209                                        list_add_tail(&dsd_ptr->list,
1210                                            &difctx->ldif_dma_hndl_list);
1211                                }
1212
1213                                /* xfrlen is min of dma pool size and sglen */
1214                                xfrlen = (sglen >
1215                                   (DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len)) ?
1216                                    DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len :
1217                                    sglen;
1218
1219                                /* replace with local allocated dma buffer */
1220                                sg_pcopy_to_buffer(sgl, sg_nents(sgl),
1221                                    dsd_ptr->dsd_addr + ldma_sg_len, xfrlen,
1222                                    difctx->dif_bundl_len);
1223                                difctx->dif_bundl_len += xfrlen;
1224                                sglen -= xfrlen;
1225                                ldma_sg_len += xfrlen;
1226                                if (ldma_sg_len == DIF_BUNDLING_DMA_POOL_SIZE ||
1227                                    sg_is_last(sg)) {
1228                                        ldma_needed = 1;
1229                                        ldma_sg_len = 0;
1230                                }
1231                        }
1232                }
1233
1234                track_difbundl_buf = used_dsds = difctx->no_dif_bundl;
1235                ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe025,
1236                    "dif_bundl_len=%x, no_dif_bundl=%x track_difbundl_buf: %x\n",
1237                    difctx->dif_bundl_len, difctx->no_dif_bundl,
1238                    track_difbundl_buf);
1239
1240                if (sp)
1241                        sp->flags |= SRB_DIF_BUNDL_DMA_VALID;
1242                else
1243                        tc->prot_flags = DIF_BUNDL_DMA_VALID;
1244
1245                list_for_each_entry_safe(dif_dsd, nxt_dsd,
1246                    &difctx->ldif_dma_hndl_list, list) {
1247                        u32 sglen = (difctx->dif_bundl_len >
1248                            DIF_BUNDLING_DMA_POOL_SIZE) ?
1249                            DIF_BUNDLING_DMA_POOL_SIZE : difctx->dif_bundl_len;
1250
1251                        BUG_ON(track_difbundl_buf == 0);
1252
1253                        /* Allocate additional continuation packets? */
1254                        if (avail_dsds == 0) {
1255                                ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha,
1256                                    0xe024,
1257                                    "%s: adding continuation iocb's\n",
1258                                    __func__);
1259                                avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1260                                    QLA_DSDS_PER_IOCB : used_dsds;
1261                                dsd_list_len = (avail_dsds + 1) * 12;
1262                                used_dsds -= avail_dsds;
1263
1264                                /* allocate tracking DS */
1265                                dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1266                                if (!dsd_ptr) {
1267                                        ql_dbg(ql_dbg_tgt, vha, 0xe026,
1268                                            "%s: failed alloc dsd_ptr\n",
1269                                            __func__);
1270                                        return 1;
1271                                }
1272                                ha->dif_bundle_kallocs++;
1273
1274                                difctx->no_ldif_dsd++;
1275                                /* allocate new list */
1276                                dsd_ptr->dsd_addr =
1277                                    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1278                                        &dsd_ptr->dsd_list_dma);
1279                                if (!dsd_ptr->dsd_addr) {
1280                                        ql_dbg(ql_dbg_tgt, vha, 0xe026,
1281                                            "%s: failed alloc ->dsd_addr\n",
1282                                            __func__);
1283                                        /*
1284                                         * need to cleanup only this dsd_ptr
1285                                         *  rest will be done by sp_free_dma()
1286                                         */
1287                                        kfree(dsd_ptr);
1288                                        ha->dif_bundle_kallocs--;
1289                                        return 1;
1290                                }
1291                                ha->dif_bundle_dma_allocs++;
1292
1293                                if (sp) {
1294                                        list_add_tail(&dsd_ptr->list,
1295                                            &difctx->ldif_dsd_list);
1296                                        sp->flags |= SRB_CRC_CTX_DSD_VALID;
1297                                } else {
1298                                        list_add_tail(&dsd_ptr->list,
1299                                            &difctx->ldif_dsd_list);
1300                                        tc->ctx_dsd_alloced = 1;
1301                                }
1302
1303                                /* add new list to cmd iocb or last list */
1304                                put_unaligned_le64(dsd_ptr->dsd_list_dma,
1305                                                   &cur_dsd->address);
1306                                cur_dsd->length = cpu_to_le32(dsd_list_len);
1307                                cur_dsd = dsd_ptr->dsd_addr;
1308                        }
1309                        put_unaligned_le64(dif_dsd->dsd_list_dma,
1310                                           &cur_dsd->address);
1311                        cur_dsd->length = cpu_to_le32(sglen);
1312                        cur_dsd++;
1313                        avail_dsds--;
1314                        difctx->dif_bundl_len -= sglen;
1315                        track_difbundl_buf--;
1316                }
1317
1318                ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe026,
1319                    "%s: no_ldif_dsd:%x, no_dif_bundl:%x\n", __func__,
1320                        difctx->no_ldif_dsd, difctx->no_dif_bundl);
1321        } else {
1322                for_each_sg(sgl, sg, tot_dsds, i) {
1323                        /* Allocate additional continuation packets? */
1324                        if (avail_dsds == 0) {
1325                                avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
1326                                    QLA_DSDS_PER_IOCB : used_dsds;
1327                                dsd_list_len = (avail_dsds + 1) * 12;
1328                                used_dsds -= avail_dsds;
1329
1330                                /* allocate tracking DS */
1331                                dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
1332                                if (!dsd_ptr) {
1333                                        ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
1334                                            vha, 0xe027,
1335                                            "%s: failed alloc dsd_dma...\n",
1336                                            __func__);
1337                                        return 1;
1338                                }
1339
1340                                /* allocate new list */
1341                                dsd_ptr->dsd_addr =
1342                                    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
1343                                        &dsd_ptr->dsd_list_dma);
1344                                if (!dsd_ptr->dsd_addr) {
1345                                        /* need to cleanup only this dsd_ptr */
1346                                        /* rest will be done by sp_free_dma() */
1347                                        kfree(dsd_ptr);
1348                                        return 1;
1349                                }
1350
1351                                if (sp) {
1352                                        list_add_tail(&dsd_ptr->list,
1353                                            &difctx->dsd_list);
1354                                        sp->flags |= SRB_CRC_CTX_DSD_VALID;
1355                                } else {
1356                                        list_add_tail(&dsd_ptr->list,
1357                                            &difctx->dsd_list);
1358                                        tc->ctx_dsd_alloced = 1;
1359                                }
1360
1361                                /* add new list to cmd iocb or last list */
1362                                put_unaligned_le64(dsd_ptr->dsd_list_dma,
1363                                                   &cur_dsd->address);
1364                                cur_dsd->length = cpu_to_le32(dsd_list_len);
1365                                cur_dsd = dsd_ptr->dsd_addr;
1366                        }
1367                        append_dsd64(&cur_dsd, sg);
1368                        avail_dsds--;
1369                }
1370        }
1371        /* Null termination */
1372        cur_dsd->address = 0;
1373        cur_dsd->length = 0;
1374        cur_dsd++;
1375        return 0;
1376}
1377
1378/**
1379 * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
1380 *                                                      Type 6 IOCB types.
1381 *
1382 * @sp: SRB command to process
1383 * @cmd_pkt: Command type 3 IOCB
1384 * @tot_dsds: Total number of segments to transfer
1385 * @tot_prot_dsds: Total number of segments with protection information
1386 * @fw_prot_opts: Protection options to be passed to firmware
1387 */
1388static inline int
1389qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
1390    uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
1391{
1392        struct dsd64            *cur_dsd;
1393        __be32                  *fcp_dl;
1394        scsi_qla_host_t         *vha;
1395        struct scsi_cmnd        *cmd;
1396        uint32_t                total_bytes = 0;
1397        uint32_t                data_bytes;
1398        uint32_t                dif_bytes;
1399        uint8_t                 bundling = 1;
1400        uint16_t                blk_size;
1401        struct crc_context      *crc_ctx_pkt = NULL;
1402        struct qla_hw_data      *ha;
1403        uint8_t                 additional_fcpcdb_len;
1404        uint16_t                fcp_cmnd_len;
1405        struct fcp_cmnd         *fcp_cmnd;
1406        dma_addr_t              crc_ctx_dma;
1407
1408        cmd = GET_CMD_SP(sp);
1409
1410        /* Update entry type to indicate Command Type CRC_2 IOCB */
1411        put_unaligned_le32(COMMAND_TYPE_CRC_2, &cmd_pkt->entry_type);
1412
1413        vha = sp->vha;
1414        ha = vha->hw;
1415
1416        /* No data transfer */
1417        data_bytes = scsi_bufflen(cmd);
1418        if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1419                cmd_pkt->byte_count = cpu_to_le32(0);
1420                return QLA_SUCCESS;
1421        }
1422
1423        cmd_pkt->vp_index = sp->vha->vp_idx;
1424
1425        /* Set transfer direction */
1426        if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1427                cmd_pkt->control_flags =
1428                    cpu_to_le16(CF_WRITE_DATA);
1429        } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
1430                cmd_pkt->control_flags =
1431                    cpu_to_le16(CF_READ_DATA);
1432        }
1433
1434        if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1435            (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
1436            (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
1437            (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1438                bundling = 0;
1439
1440        /* Allocate CRC context from global pool */
1441        crc_ctx_pkt = sp->u.scmd.crc_ctx =
1442            dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1443
1444        if (!crc_ctx_pkt)
1445                goto crc_queuing_error;
1446
1447        crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
1448
1449        sp->flags |= SRB_CRC_CTX_DMA_VALID;
1450
1451        /* Set handle */
1452        crc_ctx_pkt->handle = cmd_pkt->handle;
1453
1454        INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
1455
1456        qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1457            &crc_ctx_pkt->ref_tag, tot_prot_dsds);
1458
1459        put_unaligned_le64(crc_ctx_dma, &cmd_pkt->crc_context_address);
1460        cmd_pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
1461
1462        /* Determine SCSI command length -- align to 4 byte boundary */
1463        if (cmd->cmd_len > 16) {
1464                additional_fcpcdb_len = cmd->cmd_len - 16;
1465                if ((cmd->cmd_len % 4) != 0) {
1466                        /* SCSI cmd > 16 bytes must be multiple of 4 */
1467                        goto crc_queuing_error;
1468                }
1469                fcp_cmnd_len = 12 + cmd->cmd_len + 4;
1470        } else {
1471                additional_fcpcdb_len = 0;
1472                fcp_cmnd_len = 12 + 16 + 4;
1473        }
1474
1475        fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
1476
1477        fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
1478        if (cmd->sc_data_direction == DMA_TO_DEVICE)
1479                fcp_cmnd->additional_cdb_len |= 1;
1480        else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1481                fcp_cmnd->additional_cdb_len |= 2;
1482
1483        int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1484        memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
1485        cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
1486        put_unaligned_le64(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF,
1487                           &cmd_pkt->fcp_cmnd_dseg_address);
1488        fcp_cmnd->task_management = 0;
1489        fcp_cmnd->task_attribute = TSK_SIMPLE;
1490
1491        cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
1492
1493        /* Compute dif len and adjust data len to incude protection */
1494        dif_bytes = 0;
1495        blk_size = cmd->device->sector_size;
1496        dif_bytes = (data_bytes / blk_size) * 8;
1497
1498        switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1499        case SCSI_PROT_READ_INSERT:
1500        case SCSI_PROT_WRITE_STRIP:
1501                total_bytes = data_bytes;
1502                data_bytes += dif_bytes;
1503                break;
1504
1505        case SCSI_PROT_READ_STRIP:
1506        case SCSI_PROT_WRITE_INSERT:
1507        case SCSI_PROT_READ_PASS:
1508        case SCSI_PROT_WRITE_PASS:
1509                total_bytes = data_bytes + dif_bytes;
1510                break;
1511        default:
1512                BUG();
1513        }
1514
1515        if (!qla2x00_hba_err_chk_enabled(sp))
1516                fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1517        /* HBA error checking enabled */
1518        else if (IS_PI_UNINIT_CAPABLE(ha)) {
1519                if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
1520                    || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1521                        SCSI_PROT_DIF_TYPE2))
1522                        fw_prot_opts |= BIT_10;
1523                else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
1524                    SCSI_PROT_DIF_TYPE3)
1525                        fw_prot_opts |= BIT_11;
1526        }
1527
1528        if (!bundling) {
1529                cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
1530        } else {
1531                /*
1532                 * Configure Bundling if we need to fetch interlaving
1533                 * protection PCI accesses
1534                 */
1535                fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
1536                crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
1537                crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
1538                                                        tot_prot_dsds);
1539                cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
1540        }
1541
1542        /* Finish the common fields of CRC pkt */
1543        crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
1544        crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
1545        crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
1546        crc_ctx_pkt->guard_seed = cpu_to_le16(0);
1547        /* Fibre channel byte count */
1548        cmd_pkt->byte_count = cpu_to_le32(total_bytes);
1549        fcp_dl = (__be32 *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
1550            additional_fcpcdb_len);
1551        *fcp_dl = htonl(total_bytes);
1552
1553        if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
1554                cmd_pkt->byte_count = cpu_to_le32(0);
1555                return QLA_SUCCESS;
1556        }
1557        /* Walks data segments */
1558
1559        cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1560
1561        if (!bundling && tot_prot_dsds) {
1562                if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
1563                        cur_dsd, tot_dsds, NULL))
1564                        goto crc_queuing_error;
1565        } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1566                        (tot_dsds - tot_prot_dsds), NULL))
1567                goto crc_queuing_error;
1568
1569        if (bundling && tot_prot_dsds) {
1570                /* Walks dif segments */
1571                cmd_pkt->control_flags |= cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
1572                cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
1573                if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
1574                                tot_prot_dsds, NULL))
1575                        goto crc_queuing_error;
1576        }
1577        return QLA_SUCCESS;
1578
1579crc_queuing_error:
1580        /* Cleanup will be performed by the caller */
1581
1582        return QLA_FUNCTION_FAILED;
1583}
1584
1585/**
1586 * qla24xx_start_scsi() - Send a SCSI command to the ISP
1587 * @sp: command to send to the ISP
1588 *
1589 * Returns non-zero if a failure occurred, else zero.
1590 */
1591int
1592qla24xx_start_scsi(srb_t *sp)
1593{
1594        int             nseg;
1595        unsigned long   flags;
1596        uint32_t        *clr_ptr;
1597        uint32_t        handle;
1598        struct cmd_type_7 *cmd_pkt;
1599        uint16_t        cnt;
1600        uint16_t        req_cnt;
1601        uint16_t        tot_dsds;
1602        struct req_que *req = NULL;
1603        struct rsp_que *rsp;
1604        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1605        struct scsi_qla_host *vha = sp->vha;
1606        struct qla_hw_data *ha = vha->hw;
1607
1608        /* Setup device pointers. */
1609        req = vha->req;
1610        rsp = req->rsp;
1611
1612        /* So we know we haven't pci_map'ed anything yet */
1613        tot_dsds = 0;
1614
1615        /* Send marker if required */
1616        if (vha->marker_needed != 0) {
1617                if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1618                    QLA_SUCCESS)
1619                        return QLA_FUNCTION_FAILED;
1620                vha->marker_needed = 0;
1621        }
1622
1623        /* Acquire ring specific lock */
1624        spin_lock_irqsave(&ha->hardware_lock, flags);
1625
1626        handle = qla2xxx_get_next_handle(req);
1627        if (handle == 0)
1628                goto queuing_error;
1629
1630        /* Map the sg table so we have an accurate count of sg entries needed */
1631        if (scsi_sg_count(cmd)) {
1632                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1633                    scsi_sg_count(cmd), cmd->sc_data_direction);
1634                if (unlikely(!nseg))
1635                        goto queuing_error;
1636        } else
1637                nseg = 0;
1638
1639        tot_dsds = nseg;
1640        req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1641
1642        sp->iores.res_type = RESOURCE_INI;
1643        sp->iores.iocb_cnt = req_cnt;
1644        if (qla_get_iocbs(sp->qpair, &sp->iores))
1645                goto queuing_error;
1646
1647        if (req->cnt < (req_cnt + 2)) {
1648                if (IS_SHADOW_REG_CAPABLE(ha)) {
1649                        cnt = *req->out_ptr;
1650                } else {
1651                        cnt = rd_reg_dword_relaxed(req->req_q_out);
1652                        if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1653                                goto queuing_error;
1654                }
1655
1656                if (req->ring_index < cnt)
1657                        req->cnt = cnt - req->ring_index;
1658                else
1659                        req->cnt = req->length -
1660                                (req->ring_index - cnt);
1661                if (req->cnt < (req_cnt + 2))
1662                        goto queuing_error;
1663        }
1664
1665        /* Build command packet. */
1666        req->current_outstanding_cmd = handle;
1667        req->outstanding_cmds[handle] = sp;
1668        sp->handle = handle;
1669        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1670        req->cnt -= req_cnt;
1671
1672        cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1673        cmd_pkt->handle = make_handle(req->id, handle);
1674
1675        /* Zero out remaining portion of packet. */
1676        /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1677        clr_ptr = (uint32_t *)cmd_pkt + 2;
1678        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1679        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1680
1681        /* Set NPORT-ID and LUN number*/
1682        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1683        cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1684        cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1685        cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1686        cmd_pkt->vp_index = sp->vha->vp_idx;
1687
1688        int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1689        host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1690
1691        cmd_pkt->task = TSK_SIMPLE;
1692
1693        /* Load SCSI command packet. */
1694        memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
1695        host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
1696
1697        cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1698
1699        /* Build IOCB segments */
1700        qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
1701
1702        /* Set total data segment count. */
1703        cmd_pkt->entry_count = (uint8_t)req_cnt;
1704        wmb();
1705        /* Adjust ring index. */
1706        req->ring_index++;
1707        if (req->ring_index == req->length) {
1708                req->ring_index = 0;
1709                req->ring_ptr = req->ring;
1710        } else
1711                req->ring_ptr++;
1712
1713        sp->flags |= SRB_DMA_VALID;
1714
1715        /* Set chip new ring index. */
1716        wrt_reg_dword(req->req_q_in, req->ring_index);
1717
1718        /* Manage unprocessed RIO/ZIO commands in response queue. */
1719        if (vha->flags.process_response_queue &&
1720            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1721                qla24xx_process_response_queue(vha, rsp);
1722
1723        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1724        return QLA_SUCCESS;
1725
1726queuing_error:
1727        if (tot_dsds)
1728                scsi_dma_unmap(cmd);
1729
1730        qla_put_iocbs(sp->qpair, &sp->iores);
1731        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1732
1733        return QLA_FUNCTION_FAILED;
1734}
1735
1736/**
1737 * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
1738 * @sp: command to send to the ISP
1739 *
1740 * Returns non-zero if a failure occurred, else zero.
1741 */
1742int
1743qla24xx_dif_start_scsi(srb_t *sp)
1744{
1745        int                     nseg;
1746        unsigned long           flags;
1747        uint32_t                *clr_ptr;
1748        uint32_t                handle;
1749        uint16_t                cnt;
1750        uint16_t                req_cnt = 0;
1751        uint16_t                tot_dsds;
1752        uint16_t                tot_prot_dsds;
1753        uint16_t                fw_prot_opts = 0;
1754        struct req_que          *req = NULL;
1755        struct rsp_que          *rsp = NULL;
1756        struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
1757        struct scsi_qla_host    *vha = sp->vha;
1758        struct qla_hw_data      *ha = vha->hw;
1759        struct cmd_type_crc_2   *cmd_pkt;
1760        uint32_t                status = 0;
1761
1762#define QDSS_GOT_Q_SPACE        BIT_0
1763
1764        /* Only process protection or >16 cdb in this routine */
1765        if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
1766                if (cmd->cmd_len <= 16)
1767                        return qla24xx_start_scsi(sp);
1768        }
1769
1770        /* Setup device pointers. */
1771        req = vha->req;
1772        rsp = req->rsp;
1773
1774        /* So we know we haven't pci_map'ed anything yet */
1775        tot_dsds = 0;
1776
1777        /* Send marker if required */
1778        if (vha->marker_needed != 0) {
1779                if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
1780                    QLA_SUCCESS)
1781                        return QLA_FUNCTION_FAILED;
1782                vha->marker_needed = 0;
1783        }
1784
1785        /* Acquire ring specific lock */
1786        spin_lock_irqsave(&ha->hardware_lock, flags);
1787
1788        handle = qla2xxx_get_next_handle(req);
1789        if (handle == 0)
1790                goto queuing_error;
1791
1792        /* Compute number of required data segments */
1793        /* Map the sg table so we have an accurate count of sg entries needed */
1794        if (scsi_sg_count(cmd)) {
1795                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1796                    scsi_sg_count(cmd), cmd->sc_data_direction);
1797                if (unlikely(!nseg))
1798                        goto queuing_error;
1799                else
1800                        sp->flags |= SRB_DMA_VALID;
1801
1802                if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1803                    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1804                        struct qla2_sgx sgx;
1805                        uint32_t        partial;
1806
1807                        memset(&sgx, 0, sizeof(struct qla2_sgx));
1808                        sgx.tot_bytes = scsi_bufflen(cmd);
1809                        sgx.cur_sg = scsi_sglist(cmd);
1810                        sgx.sp = sp;
1811
1812                        nseg = 0;
1813                        while (qla24xx_get_one_block_sg(
1814                            cmd->device->sector_size, &sgx, &partial))
1815                                nseg++;
1816                }
1817        } else
1818                nseg = 0;
1819
1820        /* number of required data segments */
1821        tot_dsds = nseg;
1822
1823        /* Compute number of required protection segments */
1824        if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
1825                nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
1826                    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
1827                if (unlikely(!nseg))
1828                        goto queuing_error;
1829                else
1830                        sp->flags |= SRB_CRC_PROT_DMA_VALID;
1831
1832                if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
1833                    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
1834                        nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
1835                }
1836        } else {
1837                nseg = 0;
1838        }
1839
1840        req_cnt = 1;
1841        /* Total Data and protection sg segment(s) */
1842        tot_prot_dsds = nseg;
1843        tot_dsds += nseg;
1844
1845        sp->iores.res_type = RESOURCE_INI;
1846        sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1847        if (qla_get_iocbs(sp->qpair, &sp->iores))
1848                goto queuing_error;
1849
1850        if (req->cnt < (req_cnt + 2)) {
1851                if (IS_SHADOW_REG_CAPABLE(ha)) {
1852                        cnt = *req->out_ptr;
1853                } else {
1854                        cnt = rd_reg_dword_relaxed(req->req_q_out);
1855                        if (qla2x00_check_reg16_for_disconnect(vha, cnt))
1856                                goto queuing_error;
1857                }
1858                if (req->ring_index < cnt)
1859                        req->cnt = cnt - req->ring_index;
1860                else
1861                        req->cnt = req->length -
1862                                (req->ring_index - cnt);
1863                if (req->cnt < (req_cnt + 2))
1864                        goto queuing_error;
1865        }
1866
1867        status |= QDSS_GOT_Q_SPACE;
1868
1869        /* Build header part of command packet (excluding the OPCODE). */
1870        req->current_outstanding_cmd = handle;
1871        req->outstanding_cmds[handle] = sp;
1872        sp->handle = handle;
1873        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1874        req->cnt -= req_cnt;
1875
1876        /* Fill-in common area */
1877        cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
1878        cmd_pkt->handle = make_handle(req->id, handle);
1879
1880        clr_ptr = (uint32_t *)cmd_pkt + 2;
1881        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
1882
1883        /* Set NPORT-ID and LUN number*/
1884        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
1885        cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
1886        cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
1887        cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
1888
1889        int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1890        host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1891
1892        /* Total Data and protection segment(s) */
1893        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
1894
1895        /* Build IOCB segments and adjust for data protection segments */
1896        if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
1897            req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
1898                QLA_SUCCESS)
1899                goto queuing_error;
1900
1901        cmd_pkt->entry_count = (uint8_t)req_cnt;
1902        /* Specify response queue number where completion should happen */
1903        cmd_pkt->entry_status = (uint8_t) rsp->id;
1904        cmd_pkt->timeout = cpu_to_le16(0);
1905        wmb();
1906
1907        /* Adjust ring index. */
1908        req->ring_index++;
1909        if (req->ring_index == req->length) {
1910                req->ring_index = 0;
1911                req->ring_ptr = req->ring;
1912        } else
1913                req->ring_ptr++;
1914
1915        /* Set chip new ring index. */
1916        wrt_reg_dword(req->req_q_in, req->ring_index);
1917
1918        /* Manage unprocessed RIO/ZIO commands in response queue. */
1919        if (vha->flags.process_response_queue &&
1920            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1921                qla24xx_process_response_queue(vha, rsp);
1922
1923        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1924
1925        return QLA_SUCCESS;
1926
1927queuing_error:
1928        if (status & QDSS_GOT_Q_SPACE) {
1929                req->outstanding_cmds[handle] = NULL;
1930                req->cnt += req_cnt;
1931        }
1932        /* Cleanup will be performed by the caller (queuecommand) */
1933
1934        qla_put_iocbs(sp->qpair, &sp->iores);
1935        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1936
1937        return QLA_FUNCTION_FAILED;
1938}
1939
1940/**
1941 * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
1942 * @sp: command to send to the ISP
1943 *
1944 * Returns non-zero if a failure occurred, else zero.
1945 */
1946static int
1947qla2xxx_start_scsi_mq(srb_t *sp)
1948{
1949        int             nseg;
1950        unsigned long   flags;
1951        uint32_t        *clr_ptr;
1952        uint32_t        handle;
1953        struct cmd_type_7 *cmd_pkt;
1954        uint16_t        cnt;
1955        uint16_t        req_cnt;
1956        uint16_t        tot_dsds;
1957        struct req_que *req = NULL;
1958        struct rsp_que *rsp;
1959        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1960        struct scsi_qla_host *vha = sp->fcport->vha;
1961        struct qla_hw_data *ha = vha->hw;
1962        struct qla_qpair *qpair = sp->qpair;
1963
1964        /* Acquire qpair specific lock */
1965        spin_lock_irqsave(&qpair->qp_lock, flags);
1966
1967        /* Setup qpair pointers */
1968        req = qpair->req;
1969        rsp = qpair->rsp;
1970
1971        /* So we know we haven't pci_map'ed anything yet */
1972        tot_dsds = 0;
1973
1974        /* Send marker if required */
1975        if (vha->marker_needed != 0) {
1976                if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
1977                    QLA_SUCCESS) {
1978                        spin_unlock_irqrestore(&qpair->qp_lock, flags);
1979                        return QLA_FUNCTION_FAILED;
1980                }
1981                vha->marker_needed = 0;
1982        }
1983
1984        handle = qla2xxx_get_next_handle(req);
1985        if (handle == 0)
1986                goto queuing_error;
1987
1988        /* Map the sg table so we have an accurate count of sg entries needed */
1989        if (scsi_sg_count(cmd)) {
1990                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
1991                    scsi_sg_count(cmd), cmd->sc_data_direction);
1992                if (unlikely(!nseg))
1993                        goto queuing_error;
1994        } else
1995                nseg = 0;
1996
1997        tot_dsds = nseg;
1998        req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1999
2000        sp->iores.res_type = RESOURCE_INI;
2001        sp->iores.iocb_cnt = req_cnt;
2002        if (qla_get_iocbs(sp->qpair, &sp->iores))
2003                goto queuing_error;
2004
2005        if (req->cnt < (req_cnt + 2)) {
2006                if (IS_SHADOW_REG_CAPABLE(ha)) {
2007                        cnt = *req->out_ptr;
2008                } else {
2009                        cnt = rd_reg_dword_relaxed(req->req_q_out);
2010                        if (qla2x00_check_reg16_for_disconnect(vha, cnt))
2011                                goto queuing_error;
2012                }
2013
2014                if (req->ring_index < cnt)
2015                        req->cnt = cnt - req->ring_index;
2016                else
2017                        req->cnt = req->length -
2018                                (req->ring_index - cnt);
2019                if (req->cnt < (req_cnt + 2))
2020                        goto queuing_error;
2021        }
2022
2023        /* Build command packet. */
2024        req->current_outstanding_cmd = handle;
2025        req->outstanding_cmds[handle] = sp;
2026        sp->handle = handle;
2027        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2028        req->cnt -= req_cnt;
2029
2030        cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
2031        cmd_pkt->handle = make_handle(req->id, handle);
2032
2033        /* Zero out remaining portion of packet. */
2034        /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
2035        clr_ptr = (uint32_t *)cmd_pkt + 2;
2036        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2037        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2038
2039        /* Set NPORT-ID and LUN number*/
2040        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2041        cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2042        cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2043        cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2044        cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2045
2046        int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2047        host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2048
2049        cmd_pkt->task = TSK_SIMPLE;
2050
2051        /* Load SCSI command packet. */
2052        memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
2053        host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
2054
2055        cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
2056
2057        /* Build IOCB segments */
2058        qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
2059
2060        /* Set total data segment count. */
2061        cmd_pkt->entry_count = (uint8_t)req_cnt;
2062        wmb();
2063        /* Adjust ring index. */
2064        req->ring_index++;
2065        if (req->ring_index == req->length) {
2066                req->ring_index = 0;
2067                req->ring_ptr = req->ring;
2068        } else
2069                req->ring_ptr++;
2070
2071        sp->flags |= SRB_DMA_VALID;
2072
2073        /* Set chip new ring index. */
2074        wrt_reg_dword(req->req_q_in, req->ring_index);
2075
2076        /* Manage unprocessed RIO/ZIO commands in response queue. */
2077        if (vha->flags.process_response_queue &&
2078            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2079                qla24xx_process_response_queue(vha, rsp);
2080
2081        spin_unlock_irqrestore(&qpair->qp_lock, flags);
2082        return QLA_SUCCESS;
2083
2084queuing_error:
2085        if (tot_dsds)
2086                scsi_dma_unmap(cmd);
2087
2088        qla_put_iocbs(sp->qpair, &sp->iores);
2089        spin_unlock_irqrestore(&qpair->qp_lock, flags);
2090
2091        return QLA_FUNCTION_FAILED;
2092}
2093
2094
2095/**
2096 * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
2097 * @sp: command to send to the ISP
2098 *
2099 * Returns non-zero if a failure occurred, else zero.
2100 */
2101int
2102qla2xxx_dif_start_scsi_mq(srb_t *sp)
2103{
2104        int                     nseg;
2105        unsigned long           flags;
2106        uint32_t                *clr_ptr;
2107        uint32_t                handle;
2108        uint16_t                cnt;
2109        uint16_t                req_cnt = 0;
2110        uint16_t                tot_dsds;
2111        uint16_t                tot_prot_dsds;
2112        uint16_t                fw_prot_opts = 0;
2113        struct req_que          *req = NULL;
2114        struct rsp_que          *rsp = NULL;
2115        struct scsi_cmnd        *cmd = GET_CMD_SP(sp);
2116        struct scsi_qla_host    *vha = sp->fcport->vha;
2117        struct qla_hw_data      *ha = vha->hw;
2118        struct cmd_type_crc_2   *cmd_pkt;
2119        uint32_t                status = 0;
2120        struct qla_qpair        *qpair = sp->qpair;
2121
2122#define QDSS_GOT_Q_SPACE        BIT_0
2123
2124        /* Check for host side state */
2125        if (!qpair->online) {
2126                cmd->result = DID_NO_CONNECT << 16;
2127                return QLA_INTERFACE_ERROR;
2128        }
2129
2130        if (!qpair->difdix_supported &&
2131                scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
2132                cmd->result = DID_NO_CONNECT << 16;
2133                return QLA_INTERFACE_ERROR;
2134        }
2135
2136        /* Only process protection or >16 cdb in this routine */
2137        if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
2138                if (cmd->cmd_len <= 16)
2139                        return qla2xxx_start_scsi_mq(sp);
2140        }
2141
2142        spin_lock_irqsave(&qpair->qp_lock, flags);
2143
2144        /* Setup qpair pointers */
2145        rsp = qpair->rsp;
2146        req = qpair->req;
2147
2148        /* So we know we haven't pci_map'ed anything yet */
2149        tot_dsds = 0;
2150
2151        /* Send marker if required */
2152        if (vha->marker_needed != 0) {
2153                if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
2154                    QLA_SUCCESS) {
2155                        spin_unlock_irqrestore(&qpair->qp_lock, flags);
2156                        return QLA_FUNCTION_FAILED;
2157                }
2158                vha->marker_needed = 0;
2159        }
2160
2161        handle = qla2xxx_get_next_handle(req);
2162        if (handle == 0)
2163                goto queuing_error;
2164
2165        /* Compute number of required data segments */
2166        /* Map the sg table so we have an accurate count of sg entries needed */
2167        if (scsi_sg_count(cmd)) {
2168                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
2169                    scsi_sg_count(cmd), cmd->sc_data_direction);
2170                if (unlikely(!nseg))
2171                        goto queuing_error;
2172                else
2173                        sp->flags |= SRB_DMA_VALID;
2174
2175                if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2176                    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2177                        struct qla2_sgx sgx;
2178                        uint32_t        partial;
2179
2180                        memset(&sgx, 0, sizeof(struct qla2_sgx));
2181                        sgx.tot_bytes = scsi_bufflen(cmd);
2182                        sgx.cur_sg = scsi_sglist(cmd);
2183                        sgx.sp = sp;
2184
2185                        nseg = 0;
2186                        while (qla24xx_get_one_block_sg(
2187                            cmd->device->sector_size, &sgx, &partial))
2188                                nseg++;
2189                }
2190        } else
2191                nseg = 0;
2192
2193        /* number of required data segments */
2194        tot_dsds = nseg;
2195
2196        /* Compute number of required protection segments */
2197        if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
2198                nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
2199                    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
2200                if (unlikely(!nseg))
2201                        goto queuing_error;
2202                else
2203                        sp->flags |= SRB_CRC_PROT_DMA_VALID;
2204
2205                if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
2206                    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
2207                        nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
2208                }
2209        } else {
2210                nseg = 0;
2211        }
2212
2213        req_cnt = 1;
2214        /* Total Data and protection sg segment(s) */
2215        tot_prot_dsds = nseg;
2216        tot_dsds += nseg;
2217
2218        sp->iores.res_type = RESOURCE_INI;
2219        sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
2220        if (qla_get_iocbs(sp->qpair, &sp->iores))
2221                goto queuing_error;
2222
2223        if (req->cnt < (req_cnt + 2)) {
2224                if (IS_SHADOW_REG_CAPABLE(ha)) {
2225                        cnt = *req->out_ptr;
2226                } else {
2227                        cnt = rd_reg_dword_relaxed(req->req_q_out);
2228                        if (qla2x00_check_reg16_for_disconnect(vha, cnt))
2229                                goto queuing_error;
2230                }
2231
2232                if (req->ring_index < cnt)
2233                        req->cnt = cnt - req->ring_index;
2234                else
2235                        req->cnt = req->length -
2236                                (req->ring_index - cnt);
2237                if (req->cnt < (req_cnt + 2))
2238                        goto queuing_error;
2239        }
2240
2241        status |= QDSS_GOT_Q_SPACE;
2242
2243        /* Build header part of command packet (excluding the OPCODE). */
2244        req->current_outstanding_cmd = handle;
2245        req->outstanding_cmds[handle] = sp;
2246        sp->handle = handle;
2247        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2248        req->cnt -= req_cnt;
2249
2250        /* Fill-in common area */
2251        cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
2252        cmd_pkt->handle = make_handle(req->id, handle);
2253
2254        clr_ptr = (uint32_t *)cmd_pkt + 2;
2255        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
2256
2257        /* Set NPORT-ID and LUN number*/
2258        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2259        cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
2260        cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
2261        cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
2262
2263        int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2264        host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
2265
2266        /* Total Data and protection segment(s) */
2267        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
2268
2269        /* Build IOCB segments and adjust for data protection segments */
2270        if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
2271            req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
2272                QLA_SUCCESS)
2273                goto queuing_error;
2274
2275        cmd_pkt->entry_count = (uint8_t)req_cnt;
2276        cmd_pkt->timeout = cpu_to_le16(0);
2277        wmb();
2278
2279        /* Adjust ring index. */
2280        req->ring_index++;
2281        if (req->ring_index == req->length) {
2282                req->ring_index = 0;
2283                req->ring_ptr = req->ring;
2284        } else
2285                req->ring_ptr++;
2286
2287        /* Set chip new ring index. */
2288        wrt_reg_dword(req->req_q_in, req->ring_index);
2289
2290        /* Manage unprocessed RIO/ZIO commands in response queue. */
2291        if (vha->flags.process_response_queue &&
2292            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
2293                qla24xx_process_response_queue(vha, rsp);
2294
2295        spin_unlock_irqrestore(&qpair->qp_lock, flags);
2296
2297        return QLA_SUCCESS;
2298
2299queuing_error:
2300        if (status & QDSS_GOT_Q_SPACE) {
2301                req->outstanding_cmds[handle] = NULL;
2302                req->cnt += req_cnt;
2303        }
2304        /* Cleanup will be performed by the caller (queuecommand) */
2305
2306        qla_put_iocbs(sp->qpair, &sp->iores);
2307        spin_unlock_irqrestore(&qpair->qp_lock, flags);
2308
2309        return QLA_FUNCTION_FAILED;
2310}
2311
2312/* Generic Control-SRB manipulation functions. */
2313
2314/* hardware_lock assumed to be held. */
2315
2316void *
2317__qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
2318{
2319        scsi_qla_host_t *vha = qpair->vha;
2320        struct qla_hw_data *ha = vha->hw;
2321        struct req_que *req = qpair->req;
2322        device_reg_t *reg = ISP_QUE_REG(ha, req->id);
2323        uint32_t handle;
2324        request_t *pkt;
2325        uint16_t cnt, req_cnt;
2326
2327        pkt = NULL;
2328        req_cnt = 1;
2329        handle = 0;
2330
2331        if (sp && (sp->type != SRB_SCSI_CMD)) {
2332                /* Adjust entry-counts as needed. */
2333                req_cnt = sp->iocbs;
2334        }
2335
2336        /* Check for room on request queue. */
2337        if (req->cnt < req_cnt + 2) {
2338                if (qpair->use_shadow_reg)
2339                        cnt = *req->out_ptr;
2340                else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
2341                    IS_QLA28XX(ha))
2342                        cnt = rd_reg_dword(&reg->isp25mq.req_q_out);
2343                else if (IS_P3P_TYPE(ha))
2344                        cnt = rd_reg_dword(reg->isp82.req_q_out);
2345                else if (IS_FWI2_CAPABLE(ha))
2346                        cnt = rd_reg_dword(&reg->isp24.req_q_out);
2347                else if (IS_QLAFX00(ha))
2348                        cnt = rd_reg_dword(&reg->ispfx00.req_q_out);
2349                else
2350                        cnt = qla2x00_debounce_register(
2351                            ISP_REQ_Q_OUT(ha, &reg->isp));
2352
2353                if (!qpair->use_shadow_reg && cnt == ISP_REG16_DISCONNECT) {
2354                        qla_schedule_eeh_work(vha);
2355                        return NULL;
2356                }
2357
2358                if  (req->ring_index < cnt)
2359                        req->cnt = cnt - req->ring_index;
2360                else
2361                        req->cnt = req->length -
2362                            (req->ring_index - cnt);
2363        }
2364        if (req->cnt < req_cnt + 2)
2365                goto queuing_error;
2366
2367        if (sp) {
2368                handle = qla2xxx_get_next_handle(req);
2369                if (handle == 0) {
2370                        ql_log(ql_log_warn, vha, 0x700b,
2371                            "No room on outstanding cmd array.\n");
2372                        goto queuing_error;
2373                }
2374
2375                /* Prep command array. */
2376                req->current_outstanding_cmd = handle;
2377                req->outstanding_cmds[handle] = sp;
2378                sp->handle = handle;
2379        }
2380
2381        /* Prep packet */
2382        req->cnt -= req_cnt;
2383        pkt = req->ring_ptr;
2384        memset(pkt, 0, REQUEST_ENTRY_SIZE);
2385        if (IS_QLAFX00(ha)) {
2386                wrt_reg_byte((u8 __force __iomem *)&pkt->entry_count, req_cnt);
2387                wrt_reg_dword((__le32 __force __iomem *)&pkt->handle, handle);
2388        } else {
2389                pkt->entry_count = req_cnt;
2390                pkt->handle = handle;
2391        }
2392
2393        return pkt;
2394
2395queuing_error:
2396        qpair->tgt_counters.num_alloc_iocb_failed++;
2397        return pkt;
2398}
2399
2400void *
2401qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
2402{
2403        scsi_qla_host_t *vha = qpair->vha;
2404
2405        if (qla2x00_reset_active(vha))
2406                return NULL;
2407
2408        return __qla2x00_alloc_iocbs(qpair, sp);
2409}
2410
2411void *
2412qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
2413{
2414        return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
2415}
2416
2417static void
2418qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2419{
2420        struct srb_iocb *lio = &sp->u.iocb_cmd;
2421
2422        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2423        logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2424        if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
2425                logio->control_flags |= cpu_to_le16(LCF_NVME_PRLI);
2426                if (sp->vha->flags.nvme_first_burst)
2427                        logio->io_parameter[0] =
2428                                cpu_to_le32(NVME_PRLI_SP_FIRST_BURST);
2429                if (sp->vha->flags.nvme2_enabled) {
2430                        /* Set service parameter BIT_7 for NVME CONF support */
2431                        logio->io_parameter[0] |=
2432                                cpu_to_le32(NVME_PRLI_SP_CONF);
2433                        /* Set service parameter BIT_8 for SLER support */
2434                        logio->io_parameter[0] |=
2435                                cpu_to_le32(NVME_PRLI_SP_SLER);
2436                        /* Set service parameter BIT_9 for PI control support */
2437                        logio->io_parameter[0] |=
2438                                cpu_to_le32(NVME_PRLI_SP_PI_CTRL);
2439                }
2440        }
2441
2442        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2443        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2444        logio->port_id[1] = sp->fcport->d_id.b.area;
2445        logio->port_id[2] = sp->fcport->d_id.b.domain;
2446        logio->vp_index = sp->vha->vp_idx;
2447}
2448
2449static void
2450qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2451{
2452        struct srb_iocb *lio = &sp->u.iocb_cmd;
2453
2454        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2455        logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2456
2457        if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
2458                logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
2459        } else {
2460                logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
2461                if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
2462                        logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
2463                if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
2464                        logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
2465        }
2466        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2467        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2468        logio->port_id[1] = sp->fcport->d_id.b.area;
2469        logio->port_id[2] = sp->fcport->d_id.b.domain;
2470        logio->vp_index = sp->vha->vp_idx;
2471}
2472
2473static void
2474qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
2475{
2476        struct qla_hw_data *ha = sp->vha->hw;
2477        struct srb_iocb *lio = &sp->u.iocb_cmd;
2478        uint16_t opts;
2479
2480        mbx->entry_type = MBX_IOCB_TYPE;
2481        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2482        mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
2483        opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
2484        opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
2485        if (HAS_EXTENDED_IDS(ha)) {
2486                mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2487                mbx->mb10 = cpu_to_le16(opts);
2488        } else {
2489                mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
2490        }
2491        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2492        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2493            sp->fcport->d_id.b.al_pa);
2494        mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2495}
2496
2497static void
2498qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2499{
2500        u16 control_flags = LCF_COMMAND_LOGO;
2501        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2502
2503        if (sp->fcport->explicit_logout) {
2504                control_flags |= LCF_EXPL_LOGO|LCF_FREE_NPORT;
2505        } else {
2506                control_flags |= LCF_IMPL_LOGO;
2507
2508                if (!sp->fcport->keep_nport_handle)
2509                        control_flags |= LCF_FREE_NPORT;
2510        }
2511
2512        logio->control_flags = cpu_to_le16(control_flags);
2513        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2514        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
2515        logio->port_id[1] = sp->fcport->d_id.b.area;
2516        logio->port_id[2] = sp->fcport->d_id.b.domain;
2517        logio->vp_index = sp->vha->vp_idx;
2518}
2519
2520static void
2521qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
2522{
2523        struct qla_hw_data *ha = sp->vha->hw;
2524
2525        mbx->entry_type = MBX_IOCB_TYPE;
2526        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2527        mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
2528        mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
2529            cpu_to_le16(sp->fcport->loop_id) :
2530            cpu_to_le16(sp->fcport->loop_id << 8);
2531        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
2532        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
2533            sp->fcport->d_id.b.al_pa);
2534        mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2535        /* Implicit: mbx->mbx10 = 0. */
2536}
2537
2538static void
2539qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
2540{
2541        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
2542        logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
2543        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2544        logio->vp_index = sp->vha->vp_idx;
2545}
2546
2547static void
2548qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
2549{
2550        struct qla_hw_data *ha = sp->vha->hw;
2551
2552        mbx->entry_type = MBX_IOCB_TYPE;
2553        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
2554        mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
2555        if (HAS_EXTENDED_IDS(ha)) {
2556                mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
2557                mbx->mb10 = cpu_to_le16(BIT_0);
2558        } else {
2559                mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
2560        }
2561        mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
2562        mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
2563        mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
2564        mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
2565        mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
2566}
2567
2568static void
2569qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
2570{
2571        uint32_t flags;
2572        uint64_t lun;
2573        struct fc_port *fcport = sp->fcport;
2574        scsi_qla_host_t *vha = fcport->vha;
2575        struct qla_hw_data *ha = vha->hw;
2576        struct srb_iocb *iocb = &sp->u.iocb_cmd;
2577        struct req_que *req = vha->req;
2578
2579        flags = iocb->u.tmf.flags;
2580        lun = iocb->u.tmf.lun;
2581
2582        tsk->entry_type = TSK_MGMT_IOCB_TYPE;
2583        tsk->entry_count = 1;
2584        tsk->handle = make_handle(req->id, tsk->handle);
2585        tsk->nport_handle = cpu_to_le16(fcport->loop_id);
2586        tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
2587        tsk->control_flags = cpu_to_le32(flags);
2588        tsk->port_id[0] = fcport->d_id.b.al_pa;
2589        tsk->port_id[1] = fcport->d_id.b.area;
2590        tsk->port_id[2] = fcport->d_id.b.domain;
2591        tsk->vp_index = fcport->vha->vp_idx;
2592
2593        if (flags == TCF_LUN_RESET) {
2594                int_to_scsilun(lun, &tsk->lun);
2595                host_to_fcp_swap((uint8_t *)&tsk->lun,
2596                        sizeof(tsk->lun));
2597        }
2598}
2599
2600void qla2x00_init_timer(srb_t *sp, unsigned long tmo)
2601{
2602        timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
2603        sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
2604        sp->free = qla2x00_sp_free;
2605        if (IS_QLAFX00(sp->vha->hw) && sp->type == SRB_FXIOCB_DCMD)
2606                init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
2607        sp->start_timer = 1;
2608}
2609
2610static void qla2x00_els_dcmd_sp_free(srb_t *sp)
2611{
2612        struct srb_iocb *elsio = &sp->u.iocb_cmd;
2613
2614        kfree(sp->fcport);
2615
2616        if (elsio->u.els_logo.els_logo_pyld)
2617                dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
2618                    elsio->u.els_logo.els_logo_pyld,
2619                    elsio->u.els_logo.els_logo_pyld_dma);
2620
2621        del_timer(&elsio->timer);
2622        qla2x00_rel_sp(sp);
2623}
2624
2625static void
2626qla2x00_els_dcmd_iocb_timeout(void *data)
2627{
2628        srb_t *sp = data;
2629        fc_port_t *fcport = sp->fcport;
2630        struct scsi_qla_host *vha = sp->vha;
2631        struct srb_iocb *lio = &sp->u.iocb_cmd;
2632        unsigned long flags = 0;
2633        int res, h;
2634
2635        ql_dbg(ql_dbg_io, vha, 0x3069,
2636            "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
2637            sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
2638            fcport->d_id.b.al_pa);
2639
2640        /* Abort the exchange */
2641        res = qla24xx_async_abort_cmd(sp, false);
2642        if (res) {
2643                ql_dbg(ql_dbg_io, vha, 0x3070,
2644                    "mbx abort_command failed.\n");
2645                spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2646                for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2647                        if (sp->qpair->req->outstanding_cmds[h] == sp) {
2648                                sp->qpair->req->outstanding_cmds[h] = NULL;
2649                                break;
2650                        }
2651                }
2652                spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2653                complete(&lio->u.els_logo.comp);
2654        } else {
2655                ql_dbg(ql_dbg_io, vha, 0x3071,
2656                    "mbx abort_command success.\n");
2657        }
2658}
2659
2660static void qla2x00_els_dcmd_sp_done(srb_t *sp, int res)
2661{
2662        fc_port_t *fcport = sp->fcport;
2663        struct srb_iocb *lio = &sp->u.iocb_cmd;
2664        struct scsi_qla_host *vha = sp->vha;
2665
2666        ql_dbg(ql_dbg_io, vha, 0x3072,
2667            "%s hdl=%x, portid=%02x%02x%02x done\n",
2668            sp->name, sp->handle, fcport->d_id.b.domain,
2669            fcport->d_id.b.area, fcport->d_id.b.al_pa);
2670
2671        complete(&lio->u.els_logo.comp);
2672}
2673
2674int
2675qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
2676    port_id_t remote_did)
2677{
2678        srb_t *sp;
2679        fc_port_t *fcport = NULL;
2680        struct srb_iocb *elsio = NULL;
2681        struct qla_hw_data *ha = vha->hw;
2682        struct els_logo_payload logo_pyld;
2683        int rval = QLA_SUCCESS;
2684
2685        fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
2686        if (!fcport) {
2687               ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
2688               return -ENOMEM;
2689        }
2690
2691        /* Alloc SRB structure */
2692        sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
2693        if (!sp) {
2694                kfree(fcport);
2695                ql_log(ql_log_info, vha, 0x70e6,
2696                 "SRB allocation failed\n");
2697                return -ENOMEM;
2698        }
2699
2700        elsio = &sp->u.iocb_cmd;
2701        fcport->loop_id = 0xFFFF;
2702        fcport->d_id.b.domain = remote_did.b.domain;
2703        fcport->d_id.b.area = remote_did.b.area;
2704        fcport->d_id.b.al_pa = remote_did.b.al_pa;
2705
2706        ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
2707            fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
2708
2709        sp->type = SRB_ELS_DCMD;
2710        sp->name = "ELS_DCMD";
2711        sp->fcport = fcport;
2712        elsio->timeout = qla2x00_els_dcmd_iocb_timeout;
2713        qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT);
2714        init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
2715        sp->done = qla2x00_els_dcmd_sp_done;
2716        sp->free = qla2x00_els_dcmd_sp_free;
2717
2718        elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
2719                            DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
2720                            GFP_KERNEL);
2721
2722        if (!elsio->u.els_logo.els_logo_pyld) {
2723                sp->free(sp);
2724                return QLA_FUNCTION_FAILED;
2725        }
2726
2727        memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
2728
2729        elsio->u.els_logo.els_cmd = els_opcode;
2730        logo_pyld.opcode = els_opcode;
2731        logo_pyld.s_id[0] = vha->d_id.b.al_pa;
2732        logo_pyld.s_id[1] = vha->d_id.b.area;
2733        logo_pyld.s_id[2] = vha->d_id.b.domain;
2734        host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
2735        memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
2736
2737        memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
2738            sizeof(struct els_logo_payload));
2739        ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3075, "LOGO buffer:");
2740        ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x010a,
2741                       elsio->u.els_logo.els_logo_pyld,
2742                       sizeof(*elsio->u.els_logo.els_logo_pyld));
2743
2744        rval = qla2x00_start_sp(sp);
2745        if (rval != QLA_SUCCESS) {
2746                sp->free(sp);
2747                return QLA_FUNCTION_FAILED;
2748        }
2749
2750        ql_dbg(ql_dbg_io, vha, 0x3074,
2751            "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
2752            sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
2753            fcport->d_id.b.area, fcport->d_id.b.al_pa);
2754
2755        wait_for_completion(&elsio->u.els_logo.comp);
2756
2757        sp->free(sp);
2758        return rval;
2759}
2760
2761static void
2762qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
2763{
2764        scsi_qla_host_t *vha = sp->vha;
2765        struct srb_iocb *elsio = &sp->u.iocb_cmd;
2766
2767        els_iocb->entry_type = ELS_IOCB_TYPE;
2768        els_iocb->entry_count = 1;
2769        els_iocb->sys_define = 0;
2770        els_iocb->entry_status = 0;
2771        els_iocb->handle = sp->handle;
2772        els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
2773        els_iocb->tx_dsd_count = cpu_to_le16(1);
2774        els_iocb->vp_index = vha->vp_idx;
2775        els_iocb->sof_type = EST_SOFI3;
2776        els_iocb->rx_dsd_count = 0;
2777        els_iocb->opcode = elsio->u.els_logo.els_cmd;
2778
2779        els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
2780        els_iocb->d_id[1] = sp->fcport->d_id.b.area;
2781        els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
2782        /* For SID the byte order is different than DID */
2783        els_iocb->s_id[1] = vha->d_id.b.al_pa;
2784        els_iocb->s_id[2] = vha->d_id.b.area;
2785        els_iocb->s_id[0] = vha->d_id.b.domain;
2786
2787        if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
2788                els_iocb->control_flags = 0;
2789                els_iocb->tx_byte_count = els_iocb->tx_len =
2790                        cpu_to_le32(sizeof(struct els_plogi_payload));
2791                put_unaligned_le64(elsio->u.els_plogi.els_plogi_pyld_dma,
2792                                   &els_iocb->tx_address);
2793                els_iocb->rx_dsd_count = cpu_to_le16(1);
2794                els_iocb->rx_byte_count = els_iocb->rx_len =
2795                        cpu_to_le32(sizeof(struct els_plogi_payload));
2796                put_unaligned_le64(elsio->u.els_plogi.els_resp_pyld_dma,
2797                                   &els_iocb->rx_address);
2798
2799                ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
2800                    "PLOGI ELS IOCB:\n");
2801                ql_dump_buffer(ql_log_info, vha, 0x0109,
2802                    (uint8_t *)els_iocb,
2803                    sizeof(*els_iocb));
2804        } else {
2805                els_iocb->control_flags = cpu_to_le16(1 << 13);
2806                els_iocb->tx_byte_count =
2807                        cpu_to_le32(sizeof(struct els_logo_payload));
2808                put_unaligned_le64(elsio->u.els_logo.els_logo_pyld_dma,
2809                                   &els_iocb->tx_address);
2810                els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
2811
2812                els_iocb->rx_byte_count = 0;
2813                els_iocb->rx_address = 0;
2814                els_iocb->rx_len = 0;
2815                ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3076,
2816                       "LOGO ELS IOCB:");
2817                ql_dump_buffer(ql_log_info, vha, 0x010b,
2818                               els_iocb,
2819                               sizeof(*els_iocb));
2820        }
2821
2822        sp->vha->qla_stats.control_requests++;
2823}
2824
2825static void
2826qla2x00_els_dcmd2_iocb_timeout(void *data)
2827{
2828        srb_t *sp = data;
2829        fc_port_t *fcport = sp->fcport;
2830        struct scsi_qla_host *vha = sp->vha;
2831        unsigned long flags = 0;
2832        int res, h;
2833
2834        ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
2835            "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
2836            sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
2837
2838        /* Abort the exchange */
2839        res = qla24xx_async_abort_cmd(sp, false);
2840        ql_dbg(ql_dbg_io, vha, 0x3070,
2841            "mbx abort_command %s\n",
2842            (res == QLA_SUCCESS) ? "successful" : "failed");
2843        if (res) {
2844                spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
2845                for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
2846                        if (sp->qpair->req->outstanding_cmds[h] == sp) {
2847                                sp->qpair->req->outstanding_cmds[h] = NULL;
2848                                break;
2849                        }
2850                }
2851                spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
2852                sp->done(sp, QLA_FUNCTION_TIMEOUT);
2853        }
2854}
2855
2856void qla2x00_els_dcmd2_free(scsi_qla_host_t *vha, struct els_plogi *els_plogi)
2857{
2858        if (els_plogi->els_plogi_pyld)
2859                dma_free_coherent(&vha->hw->pdev->dev,
2860                                  els_plogi->tx_size,
2861                                  els_plogi->els_plogi_pyld,
2862                                  els_plogi->els_plogi_pyld_dma);
2863
2864        if (els_plogi->els_resp_pyld)
2865                dma_free_coherent(&vha->hw->pdev->dev,
2866                                  els_plogi->rx_size,
2867                                  els_plogi->els_resp_pyld,
2868                                  els_plogi->els_resp_pyld_dma);
2869}
2870
2871static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
2872{
2873        fc_port_t *fcport = sp->fcport;
2874        struct srb_iocb *lio = &sp->u.iocb_cmd;
2875        struct scsi_qla_host *vha = sp->vha;
2876        struct event_arg ea;
2877        struct qla_work_evt *e;
2878        struct fc_port *conflict_fcport;
2879        port_id_t cid;  /* conflict Nport id */
2880        const __le32 *fw_status = sp->u.iocb_cmd.u.els_plogi.fw_status;
2881        u16 lid;
2882
2883        ql_dbg(ql_dbg_disc, vha, 0x3072,
2884            "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
2885            sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
2886
2887        fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
2888        del_timer(&sp->u.iocb_cmd.timer);
2889
2890        if (sp->flags & SRB_WAKEUP_ON_COMP)
2891                complete(&lio->u.els_plogi.comp);
2892        else {
2893                switch (le32_to_cpu(fw_status[0])) {
2894                case CS_DATA_UNDERRUN:
2895                case CS_COMPLETE:
2896                        memset(&ea, 0, sizeof(ea));
2897                        ea.fcport = fcport;
2898                        ea.rc = res;
2899                        qla_handle_els_plogi_done(vha, &ea);
2900                        break;
2901
2902                case CS_IOCB_ERROR:
2903                        switch (le32_to_cpu(fw_status[1])) {
2904                        case LSC_SCODE_PORTID_USED:
2905                                lid = le32_to_cpu(fw_status[2]) & 0xffff;
2906                                qlt_find_sess_invalidate_other(vha,
2907                                    wwn_to_u64(fcport->port_name),
2908                                    fcport->d_id, lid, &conflict_fcport);
2909                                if (conflict_fcport) {
2910                                        /*
2911                                         * Another fcport shares the same
2912                                         * loop_id & nport id; conflict
2913                                         * fcport needs to finish cleanup
2914                                         * before this fcport can proceed
2915                                         * to login.
2916                                         */
2917                                        conflict_fcport->conflict = fcport;
2918                                        fcport->login_pause = 1;
2919                                        ql_dbg(ql_dbg_disc, vha, 0x20ed,
2920                                            "%s %d %8phC pid %06x inuse with lid %#x post gidpn\n",
2921                                            __func__, __LINE__,
2922                                            fcport->port_name,
2923                                            fcport->d_id.b24, lid);
2924                                } else {
2925                                        ql_dbg(ql_dbg_disc, vha, 0x20ed,
2926                                            "%s %d %8phC pid %06x inuse with lid %#x sched del\n",
2927                                            __func__, __LINE__,
2928                                            fcport->port_name,
2929                                            fcport->d_id.b24, lid);
2930                                        qla2x00_clear_loop_id(fcport);
2931                                        set_bit(lid, vha->hw->loop_id_map);
2932                                        fcport->loop_id = lid;
2933                                        fcport->keep_nport_handle = 0;
2934                                        qlt_schedule_sess_for_deletion(fcport);
2935                                }
2936                                break;
2937
2938                        case LSC_SCODE_NPORT_USED:
2939                                cid.b.domain = (le32_to_cpu(fw_status[2]) >> 16)
2940                                        & 0xff;
2941                                cid.b.area   = (le32_to_cpu(fw_status[2]) >>  8)
2942                                        & 0xff;
2943                                cid.b.al_pa  = le32_to_cpu(fw_status[2]) & 0xff;
2944                                cid.b.rsvd_1 = 0;
2945
2946                                ql_dbg(ql_dbg_disc, vha, 0x20ec,
2947                                    "%s %d %8phC lid %#x in use with pid %06x post gnl\n",
2948                                    __func__, __LINE__, fcport->port_name,
2949                                    fcport->loop_id, cid.b24);
2950                                set_bit(fcport->loop_id,
2951                                    vha->hw->loop_id_map);
2952                                fcport->loop_id = FC_NO_LOOP_ID;
2953                                qla24xx_post_gnl_work(vha, fcport);
2954                                break;
2955
2956                        case LSC_SCODE_NOXCB:
2957                                vha->hw->exch_starvation++;
2958                                if (vha->hw->exch_starvation > 5) {
2959                                        ql_log(ql_log_warn, vha, 0xd046,
2960                                            "Exchange starvation. Resetting RISC\n");
2961                                        vha->hw->exch_starvation = 0;
2962                                        set_bit(ISP_ABORT_NEEDED,
2963                                            &vha->dpc_flags);
2964                                        qla2xxx_wake_dpc(vha);
2965                                }
2966                                fallthrough;
2967                        default:
2968                                ql_dbg(ql_dbg_disc, vha, 0x20eb,
2969                                    "%s %8phC cmd error fw_status 0x%x 0x%x 0x%x\n",
2970                                    __func__, sp->fcport->port_name,
2971                                    fw_status[0], fw_status[1], fw_status[2]);
2972
2973                                fcport->flags &= ~FCF_ASYNC_SENT;
2974                                qla2x00_set_fcport_disc_state(fcport,
2975                                    DSC_LOGIN_FAILED);
2976                                set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2977                                break;
2978                        }
2979                        break;
2980
2981                default:
2982                        ql_dbg(ql_dbg_disc, vha, 0x20eb,
2983                            "%s %8phC cmd error 2 fw_status 0x%x 0x%x 0x%x\n",
2984                            __func__, sp->fcport->port_name,
2985                            fw_status[0], fw_status[1], fw_status[2]);
2986
2987                        sp->fcport->flags &= ~FCF_ASYNC_SENT;
2988                        qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_FAILED);
2989                        set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
2990                        break;
2991                }
2992
2993                e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
2994                if (!e) {
2995                        struct srb_iocb *elsio = &sp->u.iocb_cmd;
2996
2997                        qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
2998                        sp->free(sp);
2999                        return;
3000                }
3001                e->u.iosb.sp = sp;
3002                qla2x00_post_work(vha, e);
3003        }
3004}
3005
3006int
3007qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
3008    fc_port_t *fcport, bool wait)
3009{
3010        srb_t *sp;
3011        struct srb_iocb *elsio = NULL;
3012        struct qla_hw_data *ha = vha->hw;
3013        int rval = QLA_SUCCESS;
3014        void    *ptr, *resp_ptr;
3015
3016        /* Alloc SRB structure */
3017        sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
3018        if (!sp) {
3019                ql_log(ql_log_info, vha, 0x70e6,
3020                 "SRB allocation failed\n");
3021                fcport->flags &= ~FCF_ASYNC_ACTIVE;
3022                return -ENOMEM;
3023        }
3024
3025        fcport->flags |= FCF_ASYNC_SENT;
3026        qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_PEND);
3027        elsio = &sp->u.iocb_cmd;
3028        ql_dbg(ql_dbg_io, vha, 0x3073,
3029            "Enter: PLOGI portid=%06x\n", fcport->d_id.b24);
3030
3031        sp->type = SRB_ELS_DCMD;
3032        sp->name = "ELS_DCMD";
3033        sp->fcport = fcport;
3034
3035        elsio->timeout = qla2x00_els_dcmd2_iocb_timeout;
3036        if (wait)
3037                sp->flags = SRB_WAKEUP_ON_COMP;
3038
3039        qla2x00_init_timer(sp, ELS_DCMD_TIMEOUT + 2);
3040
3041        sp->done = qla2x00_els_dcmd2_sp_done;
3042        elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
3043
3044        ptr = elsio->u.els_plogi.els_plogi_pyld =
3045            dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.tx_size,
3046                &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
3047
3048        if (!elsio->u.els_plogi.els_plogi_pyld) {
3049                rval = QLA_FUNCTION_FAILED;
3050                goto out;
3051        }
3052
3053        resp_ptr = elsio->u.els_plogi.els_resp_pyld =
3054            dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.rx_size,
3055                &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
3056
3057        if (!elsio->u.els_plogi.els_resp_pyld) {
3058                rval = QLA_FUNCTION_FAILED;
3059                goto out;
3060        }
3061
3062        ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
3063
3064        memset(ptr, 0, sizeof(struct els_plogi_payload));
3065        memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
3066        memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
3067            &ha->plogi_els_payld.fl_csp, LOGIN_TEMPLATE_SIZE);
3068
3069        elsio->u.els_plogi.els_cmd = els_opcode;
3070        elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
3071
3072        ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
3073        ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
3074            (uint8_t *)elsio->u.els_plogi.els_plogi_pyld,
3075            sizeof(*elsio->u.els_plogi.els_plogi_pyld));
3076
3077        init_completion(&elsio->u.els_plogi.comp);
3078        rval = qla2x00_start_sp(sp);
3079        if (rval != QLA_SUCCESS) {
3080                rval = QLA_FUNCTION_FAILED;
3081        } else {
3082                ql_dbg(ql_dbg_disc, vha, 0x3074,
3083                    "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
3084                    sp->name, sp->handle, fcport->loop_id,
3085                    fcport->d_id.b24, vha->d_id.b24);
3086        }
3087
3088        if (wait) {
3089                wait_for_completion(&elsio->u.els_plogi.comp);
3090
3091                if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
3092                        rval = QLA_FUNCTION_FAILED;
3093        } else {
3094                goto done;
3095        }
3096
3097out:
3098        fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
3099        qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
3100        sp->free(sp);
3101done:
3102        return rval;
3103}
3104
3105static void
3106qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
3107{
3108        struct bsg_job *bsg_job = sp->u.bsg_job;
3109        struct fc_bsg_request *bsg_request = bsg_job->request;
3110
3111        els_iocb->entry_type = ELS_IOCB_TYPE;
3112        els_iocb->entry_count = 1;
3113        els_iocb->sys_define = 0;
3114        els_iocb->entry_status = 0;
3115        els_iocb->handle = sp->handle;
3116        els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3117        els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
3118        els_iocb->vp_index = sp->vha->vp_idx;
3119        els_iocb->sof_type = EST_SOFI3;
3120        els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
3121
3122        els_iocb->opcode =
3123            sp->type == SRB_ELS_CMD_RPT ?
3124            bsg_request->rqst_data.r_els.els_code :
3125            bsg_request->rqst_data.h_els.command_code;
3126        els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
3127        els_iocb->d_id[1] = sp->fcport->d_id.b.area;
3128        els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
3129        els_iocb->control_flags = 0;
3130        els_iocb->rx_byte_count =
3131            cpu_to_le32(bsg_job->reply_payload.payload_len);
3132        els_iocb->tx_byte_count =
3133            cpu_to_le32(bsg_job->request_payload.payload_len);
3134
3135        put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3136                           &els_iocb->tx_address);
3137        els_iocb->tx_len = cpu_to_le32(sg_dma_len
3138            (bsg_job->request_payload.sg_list));
3139
3140        put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3141                           &els_iocb->rx_address);
3142        els_iocb->rx_len = cpu_to_le32(sg_dma_len
3143            (bsg_job->reply_payload.sg_list));
3144
3145        sp->vha->qla_stats.control_requests++;
3146}
3147
3148static void
3149qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
3150{
3151        uint16_t        avail_dsds;
3152        struct dsd64    *cur_dsd;
3153        struct scatterlist *sg;
3154        int index;
3155        uint16_t tot_dsds;
3156        scsi_qla_host_t *vha = sp->vha;
3157        struct qla_hw_data *ha = vha->hw;
3158        struct bsg_job *bsg_job = sp->u.bsg_job;
3159        int entry_count = 1;
3160
3161        memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
3162        ct_iocb->entry_type = CT_IOCB_TYPE;
3163        ct_iocb->entry_status = 0;
3164        ct_iocb->handle1 = sp->handle;
3165        SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
3166        ct_iocb->status = cpu_to_le16(0);
3167        ct_iocb->control_flags = cpu_to_le16(0);
3168        ct_iocb->timeout = 0;
3169        ct_iocb->cmd_dsd_count =
3170            cpu_to_le16(bsg_job->request_payload.sg_cnt);
3171        ct_iocb->total_dsd_count =
3172            cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
3173        ct_iocb->req_bytecount =
3174            cpu_to_le32(bsg_job->request_payload.payload_len);
3175        ct_iocb->rsp_bytecount =
3176            cpu_to_le32(bsg_job->reply_payload.payload_len);
3177
3178        put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
3179                           &ct_iocb->req_dsd.address);
3180        ct_iocb->req_dsd.length = ct_iocb->req_bytecount;
3181
3182        put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
3183                           &ct_iocb->rsp_dsd.address);
3184        ct_iocb->rsp_dsd.length = ct_iocb->rsp_bytecount;
3185
3186        avail_dsds = 1;
3187        cur_dsd = &ct_iocb->rsp_dsd;
3188        index = 0;
3189        tot_dsds = bsg_job->reply_payload.sg_cnt;
3190
3191        for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
3192                cont_a64_entry_t *cont_pkt;
3193
3194                /* Allocate additional continuation packets? */
3195                if (avail_dsds == 0) {
3196                        /*
3197                        * Five DSDs are available in the Cont.
3198                        * Type 1 IOCB.
3199                               */
3200                        cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3201                            vha->hw->req_q_map[0]);
3202                        cur_dsd = cont_pkt->dsd;
3203                        avail_dsds = 5;
3204                        entry_count++;
3205                }
3206
3207                append_dsd64(&cur_dsd, sg);
3208                avail_dsds--;
3209        }
3210        ct_iocb->entry_count = entry_count;
3211
3212        sp->vha->qla_stats.control_requests++;
3213}
3214
3215static void
3216qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
3217{
3218        uint16_t        avail_dsds;
3219        struct dsd64    *cur_dsd;
3220        struct scatterlist *sg;
3221        int index;
3222        uint16_t cmd_dsds, rsp_dsds;
3223        scsi_qla_host_t *vha = sp->vha;
3224        struct qla_hw_data *ha = vha->hw;
3225        struct bsg_job *bsg_job = sp->u.bsg_job;
3226        int entry_count = 1;
3227        cont_a64_entry_t *cont_pkt = NULL;
3228
3229        ct_iocb->entry_type = CT_IOCB_TYPE;
3230        ct_iocb->entry_status = 0;
3231        ct_iocb->sys_define = 0;
3232        ct_iocb->handle = sp->handle;
3233
3234        ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3235        ct_iocb->vp_index = sp->vha->vp_idx;
3236        ct_iocb->comp_status = cpu_to_le16(0);
3237
3238        cmd_dsds = bsg_job->request_payload.sg_cnt;
3239        rsp_dsds = bsg_job->reply_payload.sg_cnt;
3240
3241        ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
3242        ct_iocb->timeout = 0;
3243        ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
3244        ct_iocb->cmd_byte_count =
3245            cpu_to_le32(bsg_job->request_payload.payload_len);
3246
3247        avail_dsds = 2;
3248        cur_dsd = ct_iocb->dsd;
3249        index = 0;
3250
3251        for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
3252                /* Allocate additional continuation packets? */
3253                if (avail_dsds == 0) {
3254                        /*
3255                         * Five DSDs are available in the Cont.
3256                         * Type 1 IOCB.
3257                         */
3258                        cont_pkt = qla2x00_prep_cont_type1_iocb(
3259                            vha, ha->req_q_map[0]);
3260                        cur_dsd = cont_pkt->dsd;
3261                        avail_dsds = 5;
3262                        entry_count++;
3263                }
3264
3265                append_dsd64(&cur_dsd, sg);
3266                avail_dsds--;
3267        }
3268
3269        index = 0;
3270
3271        for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
3272                /* Allocate additional continuation packets? */
3273                if (avail_dsds == 0) {
3274                        /*
3275                        * Five DSDs are available in the Cont.
3276                        * Type 1 IOCB.
3277                               */
3278                        cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
3279                            ha->req_q_map[0]);
3280                        cur_dsd = cont_pkt->dsd;
3281                        avail_dsds = 5;
3282                        entry_count++;
3283                }
3284
3285                append_dsd64(&cur_dsd, sg);
3286                avail_dsds--;
3287        }
3288        ct_iocb->entry_count = entry_count;
3289}
3290
3291/*
3292 * qla82xx_start_scsi() - Send a SCSI command to the ISP
3293 * @sp: command to send to the ISP
3294 *
3295 * Returns non-zero if a failure occurred, else zero.
3296 */
3297int
3298qla82xx_start_scsi(srb_t *sp)
3299{
3300        int             nseg;
3301        unsigned long   flags;
3302        struct scsi_cmnd *cmd;
3303        uint32_t        *clr_ptr;
3304        uint32_t        handle;
3305        uint16_t        cnt;
3306        uint16_t        req_cnt;
3307        uint16_t        tot_dsds;
3308        struct device_reg_82xx __iomem *reg;
3309        uint32_t dbval;
3310        __be32 *fcp_dl;
3311        uint8_t additional_cdb_len;
3312        struct ct6_dsd *ctx;
3313        struct scsi_qla_host *vha = sp->vha;
3314        struct qla_hw_data *ha = vha->hw;
3315        struct req_que *req = NULL;
3316        struct rsp_que *rsp = NULL;
3317
3318        /* Setup device pointers. */
3319        reg = &ha->iobase->isp82;
3320        cmd = GET_CMD_SP(sp);
3321        req = vha->req;
3322        rsp = ha->rsp_q_map[0];
3323
3324        /* So we know we haven't pci_map'ed anything yet */
3325        tot_dsds = 0;
3326
3327        dbval = 0x04 | (ha->portnum << 5);
3328
3329        /* Send marker if required */
3330        if (vha->marker_needed != 0) {
3331                if (qla2x00_marker(vha, ha->base_qpair,
3332                        0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
3333                        ql_log(ql_log_warn, vha, 0x300c,
3334                            "qla2x00_marker failed for cmd=%p.\n", cmd);
3335                        return QLA_FUNCTION_FAILED;
3336                }
3337                vha->marker_needed = 0;
3338        }
3339
3340        /* Acquire ring specific lock */
3341        spin_lock_irqsave(&ha->hardware_lock, flags);
3342
3343        handle = qla2xxx_get_next_handle(req);
3344        if (handle == 0)
3345                goto queuing_error;
3346
3347        /* Map the sg table so we have an accurate count of sg entries needed */
3348        if (scsi_sg_count(cmd)) {
3349                nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
3350                    scsi_sg_count(cmd), cmd->sc_data_direction);
3351                if (unlikely(!nseg))
3352                        goto queuing_error;
3353        } else
3354                nseg = 0;
3355
3356        tot_dsds = nseg;
3357
3358        if (tot_dsds > ql2xshiftctondsd) {
3359                struct cmd_type_6 *cmd_pkt;
3360                uint16_t more_dsd_lists = 0;
3361                struct dsd_dma *dsd_ptr;
3362                uint16_t i;
3363
3364                more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
3365                if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
3366                        ql_dbg(ql_dbg_io, vha, 0x300d,
3367                            "Num of DSD list %d is than %d for cmd=%p.\n",
3368                            more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
3369                            cmd);
3370                        goto queuing_error;
3371                }
3372
3373                if (more_dsd_lists <= ha->gbl_dsd_avail)
3374                        goto sufficient_dsds;
3375                else
3376                        more_dsd_lists -= ha->gbl_dsd_avail;
3377
3378                for (i = 0; i < more_dsd_lists; i++) {
3379                        dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
3380                        if (!dsd_ptr) {
3381                                ql_log(ql_log_fatal, vha, 0x300e,
3382                                    "Failed to allocate memory for dsd_dma "
3383                                    "for cmd=%p.\n", cmd);
3384                                goto queuing_error;
3385                        }
3386
3387                        dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
3388                                GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
3389                        if (!dsd_ptr->dsd_addr) {
3390                                kfree(dsd_ptr);
3391                                ql_log(ql_log_fatal, vha, 0x300f,
3392                                    "Failed to allocate memory for dsd_addr "
3393                                    "for cmd=%p.\n", cmd);
3394                                goto queuing_error;
3395                        }
3396                        list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
3397                        ha->gbl_dsd_avail++;
3398                }
3399
3400sufficient_dsds:
3401                req_cnt = 1;
3402
3403                if (req->cnt < (req_cnt + 2)) {
3404                        cnt = (uint16_t)rd_reg_dword_relaxed(
3405                                &reg->req_q_out[0]);
3406                        if (req->ring_index < cnt)
3407                                req->cnt = cnt - req->ring_index;
3408                        else
3409                                req->cnt = req->length -
3410                                        (req->ring_index - cnt);
3411                        if (req->cnt < (req_cnt + 2))
3412                                goto queuing_error;
3413                }
3414
3415                ctx = sp->u.scmd.ct6_ctx =
3416                    mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
3417                if (!ctx) {
3418                        ql_log(ql_log_fatal, vha, 0x3010,
3419                            "Failed to allocate ctx for cmd=%p.\n", cmd);
3420                        goto queuing_error;
3421                }
3422
3423                memset(ctx, 0, sizeof(struct ct6_dsd));
3424                ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
3425                        GFP_ATOMIC, &ctx->fcp_cmnd_dma);
3426                if (!ctx->fcp_cmnd) {
3427                        ql_log(ql_log_fatal, vha, 0x3011,
3428                            "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
3429                        goto queuing_error;
3430                }
3431
3432                /* Initialize the DSD list and dma handle */
3433                INIT_LIST_HEAD(&ctx->dsd_list);
3434                ctx->dsd_use_cnt = 0;
3435
3436                if (cmd->cmd_len > 16) {
3437                        additional_cdb_len = cmd->cmd_len - 16;
3438                        if ((cmd->cmd_len % 4) != 0) {
3439                                /* SCSI command bigger than 16 bytes must be
3440                                 * multiple of 4
3441                                 */
3442                                ql_log(ql_log_warn, vha, 0x3012,
3443                                    "scsi cmd len %d not multiple of 4 "
3444                                    "for cmd=%p.\n", cmd->cmd_len, cmd);
3445                                goto queuing_error_fcp_cmnd;
3446                        }
3447                        ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
3448                } else {
3449                        additional_cdb_len = 0;
3450                        ctx->fcp_cmnd_len = 12 + 16 + 4;
3451                }
3452
3453                cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
3454                cmd_pkt->handle = make_handle(req->id, handle);
3455
3456                /* Zero out remaining portion of packet. */
3457                /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
3458                clr_ptr = (uint32_t *)cmd_pkt + 2;
3459                memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3460                cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3461
3462                /* Set NPORT-ID and LUN number*/
3463                cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3464                cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3465                cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3466                cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3467                cmd_pkt->vp_index = sp->vha->vp_idx;
3468
3469                /* Build IOCB segments */
3470                if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
3471                        goto queuing_error_fcp_cmnd;
3472
3473                int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3474                host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
3475
3476                /* build FCP_CMND IU */
3477                int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
3478                ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
3479
3480                if (cmd->sc_data_direction == DMA_TO_DEVICE)
3481                        ctx->fcp_cmnd->additional_cdb_len |= 1;
3482                else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
3483                        ctx->fcp_cmnd->additional_cdb_len |= 2;
3484
3485                /* Populate the FCP_PRIO. */
3486                if (ha->flags.fcp_prio_enabled)
3487                        ctx->fcp_cmnd->task_attribute |=
3488                            sp->fcport->fcp_prio << 3;
3489
3490                memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
3491
3492                fcp_dl = (__be32 *)(ctx->fcp_cmnd->cdb + 16 +
3493                    additional_cdb_len);
3494                *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
3495
3496                cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
3497                put_unaligned_le64(ctx->fcp_cmnd_dma,
3498                                   &cmd_pkt->fcp_cmnd_dseg_address);
3499
3500                sp->flags |= SRB_FCP_CMND_DMA_VALID;
3501                cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3502                /* Set total data segment count. */
3503                cmd_pkt->entry_count = (uint8_t)req_cnt;
3504                /* Specify response queue number where
3505                 * completion should happen
3506                 */
3507                cmd_pkt->entry_status = (uint8_t) rsp->id;
3508        } else {
3509                struct cmd_type_7 *cmd_pkt;
3510
3511                req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
3512                if (req->cnt < (req_cnt + 2)) {
3513                        cnt = (uint16_t)rd_reg_dword_relaxed(
3514                            &reg->req_q_out[0]);
3515                        if (req->ring_index < cnt)
3516                                req->cnt = cnt - req->ring_index;
3517                        else
3518                                req->cnt = req->length -
3519                                        (req->ring_index - cnt);
3520                }
3521                if (req->cnt < (req_cnt + 2))
3522                        goto queuing_error;
3523
3524                cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
3525                cmd_pkt->handle = make_handle(req->id, handle);
3526
3527                /* Zero out remaining portion of packet. */
3528                /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
3529                clr_ptr = (uint32_t *)cmd_pkt + 2;
3530                memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
3531                cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
3532
3533                /* Set NPORT-ID and LUN number*/
3534                cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3535                cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
3536                cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
3537                cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
3538                cmd_pkt->vp_index = sp->vha->vp_idx;
3539
3540                int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
3541                host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
3542                    sizeof(cmd_pkt->lun));
3543
3544                /* Populate the FCP_PRIO. */
3545                if (ha->flags.fcp_prio_enabled)
3546                        cmd_pkt->task |= sp->fcport->fcp_prio << 3;
3547
3548                /* Load SCSI command packet. */
3549                memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
3550                host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
3551
3552                cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
3553
3554                /* Build IOCB segments */
3555                qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
3556
3557                /* Set total data segment count. */
3558                cmd_pkt->entry_count = (uint8_t)req_cnt;
3559                /* Specify response queue number where
3560                 * completion should happen.
3561                 */
3562                cmd_pkt->entry_status = (uint8_t) rsp->id;
3563
3564        }
3565        /* Build command packet. */
3566        req->current_outstanding_cmd = handle;
3567        req->outstanding_cmds[handle] = sp;
3568        sp->handle = handle;
3569        cmd->host_scribble = (unsigned char *)(unsigned long)handle;
3570        req->cnt -= req_cnt;
3571        wmb();
3572
3573        /* Adjust ring index. */
3574        req->ring_index++;
3575        if (req->ring_index == req->length) {
3576                req->ring_index = 0;
3577                req->ring_ptr = req->ring;
3578        } else
3579                req->ring_ptr++;
3580
3581        sp->flags |= SRB_DMA_VALID;
3582
3583        /* Set chip new ring index. */
3584        /* write, read and verify logic */
3585        dbval = dbval | (req->id << 8) | (req->ring_index << 16);
3586        if (ql2xdbwr)
3587                qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
3588        else {
3589                wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3590                wmb();
3591                while (rd_reg_dword(ha->nxdb_rd_ptr) != dbval) {
3592                        wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
3593                        wmb();
3594                }
3595        }
3596
3597        /* Manage unprocessed RIO/ZIO commands in response queue. */
3598        if (vha->flags.process_response_queue &&
3599            rsp->ring_ptr->signature != RESPONSE_PROCESSED)
3600                qla24xx_process_response_queue(vha, rsp);
3601
3602        spin_unlock_irqrestore(&ha->hardware_lock, flags);
3603        return QLA_SUCCESS;
3604
3605queuing_error_fcp_cmnd:
3606        dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
3607queuing_error:
3608        if (tot_dsds)
3609                scsi_dma_unmap(cmd);
3610
3611        if (sp->u.scmd.crc_ctx) {
3612                mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
3613                sp->u.scmd.crc_ctx = NULL;
3614        }
3615        spin_unlock_irqrestore(&ha->hardware_lock, flags);
3616
3617        return QLA_FUNCTION_FAILED;
3618}
3619
3620static void
3621qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
3622{
3623        struct srb_iocb *aio = &sp->u.iocb_cmd;
3624        scsi_qla_host_t *vha = sp->vha;
3625        struct req_que *req = sp->qpair->req;
3626        srb_t *orig_sp = sp->cmd_sp;
3627
3628        memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
3629        abt_iocb->entry_type = ABORT_IOCB_TYPE;
3630        abt_iocb->entry_count = 1;
3631        abt_iocb->handle = make_handle(req->id, sp->handle);
3632        if (sp->fcport) {
3633                abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3634                abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
3635                abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
3636                abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
3637        }
3638        abt_iocb->handle_to_abort =
3639                make_handle(le16_to_cpu(aio->u.abt.req_que_no),
3640                            aio->u.abt.cmd_hndl);
3641        abt_iocb->vp_index = vha->vp_idx;
3642        abt_iocb->req_que_no = aio->u.abt.req_que_no;
3643
3644        /* need to pass original sp */
3645        if (orig_sp)
3646                qla_nvme_abort_set_option(abt_iocb, orig_sp);
3647
3648        /* Send the command to the firmware */
3649        wmb();
3650}
3651
3652static void
3653qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
3654{
3655        int i, sz;
3656
3657        mbx->entry_type = MBX_IOCB_TYPE;
3658        mbx->handle = sp->handle;
3659        sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
3660
3661        for (i = 0; i < sz; i++)
3662                mbx->mb[i] = sp->u.iocb_cmd.u.mbx.out_mb[i];
3663}
3664
3665static void
3666qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
3667{
3668        sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
3669        qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
3670        ct_pkt->handle = sp->handle;
3671}
3672
3673static void qla2x00_send_notify_ack_iocb(srb_t *sp,
3674        struct nack_to_isp *nack)
3675{
3676        struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
3677
3678        nack->entry_type = NOTIFY_ACK_TYPE;
3679        nack->entry_count = 1;
3680        nack->ox_id = ntfy->ox_id;
3681
3682        nack->u.isp24.handle = sp->handle;
3683        nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3684        if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3685                nack->u.isp24.flags = ntfy->u.isp24.flags &
3686                        cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3687        }
3688        nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3689        nack->u.isp24.status = ntfy->u.isp24.status;
3690        nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3691        nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3692        nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3693        nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3694        nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3695        nack->u.isp24.srr_flags = 0;
3696        nack->u.isp24.srr_reject_code = 0;
3697        nack->u.isp24.srr_reject_code_expl = 0;
3698        nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3699}
3700
3701/*
3702 * Build NVME LS request
3703 */
3704static void
3705qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
3706{
3707        struct srb_iocb *nvme;
3708
3709        nvme = &sp->u.iocb_cmd;
3710        cmd_pkt->entry_type = PT_LS4_REQUEST;
3711        cmd_pkt->entry_count = 1;
3712        cmd_pkt->control_flags = cpu_to_le16(CF_LS4_ORIGINATOR << CF_LS4_SHIFT);
3713
3714        cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
3715        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3716        cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
3717
3718        cmd_pkt->tx_dseg_count = cpu_to_le16(1);
3719        cmd_pkt->tx_byte_count = cpu_to_le32(nvme->u.nvme.cmd_len);
3720        cmd_pkt->dsd[0].length = cpu_to_le32(nvme->u.nvme.cmd_len);
3721        put_unaligned_le64(nvme->u.nvme.cmd_dma, &cmd_pkt->dsd[0].address);
3722
3723        cmd_pkt->rx_dseg_count = cpu_to_le16(1);
3724        cmd_pkt->rx_byte_count = cpu_to_le32(nvme->u.nvme.rsp_len);
3725        cmd_pkt->dsd[1].length = cpu_to_le32(nvme->u.nvme.rsp_len);
3726        put_unaligned_le64(nvme->u.nvme.rsp_dma, &cmd_pkt->dsd[1].address);
3727}
3728
3729static void
3730qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
3731{
3732        int map, pos;
3733
3734        vce->entry_type = VP_CTRL_IOCB_TYPE;
3735        vce->handle = sp->handle;
3736        vce->entry_count = 1;
3737        vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
3738        vce->vp_count = cpu_to_le16(1);
3739
3740        /*
3741         * index map in firmware starts with 1; decrement index
3742         * this is ok as we never use index 0
3743         */
3744        map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
3745        pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
3746        vce->vp_idx_map[map] |= 1 << pos;
3747}
3748
3749static void
3750qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
3751{
3752        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
3753        logio->control_flags =
3754            cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
3755
3756        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
3757        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
3758        logio->port_id[1] = sp->fcport->d_id.b.area;
3759        logio->port_id[2] = sp->fcport->d_id.b.domain;
3760        logio->vp_index = sp->fcport->vha->vp_idx;
3761}
3762
3763int
3764qla2x00_start_sp(srb_t *sp)
3765{
3766        int rval = QLA_SUCCESS;
3767        scsi_qla_host_t *vha = sp->vha;
3768        struct qla_hw_data *ha = vha->hw;
3769        struct qla_qpair *qp = sp->qpair;
3770        void *pkt;
3771        unsigned long flags;
3772
3773        if (vha->hw->flags.eeh_busy)
3774                return -EIO;
3775
3776        spin_lock_irqsave(qp->qp_lock_ptr, flags);
3777        pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
3778        if (!pkt) {
3779                rval = EAGAIN;
3780                ql_log(ql_log_warn, vha, 0x700c,
3781                    "qla2x00_alloc_iocbs failed.\n");
3782                goto done;
3783        }