OSCL-LXR linux-6.0.1/​drivers/​scsi/​qla2xxx/​qla_iocb.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * QLogic Fibre Channel HBA Driver
  * Copyright (c)  2003-2014 QLogic Corporation
  */
 #include "qla_def.h"
 #include "qla_target.h"
 
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 
 #include <scsi/scsi_tcq.h>
 
 /**
  * qla2x00_get_cmd_direction() - Determine control_flag data direction.
  * @sp: SCSI command
  *
  * Returns the proper CF_* direction based on CDB.
  */
 static inline uint16_t
 qla2x00_get_cmd_direction(srb_t *sp)
 {
     uint16_t cflags;
     struct scsi_cmnd *cmd = GET_CMD_SP(sp);
     struct scsi_qla_host *vha = sp->vha;
 
     cflags = 0;
 
     /* Set transfer direction */
     if (cmd->sc_data_direction == DMA_TO_DEVICE) {
         cflags = CF_WRITE;
         vha->qla_stats.output_bytes += scsi_bufflen(cmd);
         vha->qla_stats.output_requests++;
     } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
         cflags = CF_READ;
         vha->qla_stats.input_bytes += scsi_bufflen(cmd);
         vha->qla_stats.input_requests++;
     }
     return (cflags);
 }
 
 /**
  * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
  * Continuation Type 0 IOCBs to allocate.
  *
  * @dsds: number of data segment descriptors needed
  *
  * Returns the number of IOCB entries needed to store @dsds.
  */
 uint16_t
 qla2x00_calc_iocbs_32(uint16_t dsds)
 {
     uint16_t iocbs;
 
     iocbs = 1;
     if (dsds > 3) {
         iocbs += (dsds - 3) / 7;
         if ((dsds - 3) % 7)
             iocbs++;
     }
     return (iocbs);
 }
 
 /**
  * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
  * Continuation Type 1 IOCBs to allocate.
  *
  * @dsds: number of data segment descriptors needed
  *
  * Returns the number of IOCB entries needed to store @dsds.
  */
 uint16_t
 qla2x00_calc_iocbs_64(uint16_t dsds)
 {
     uint16_t iocbs;
 
     iocbs = 1;
     if (dsds > 2) {
         iocbs += (dsds - 2) / 5;
         if ((dsds - 2) % 5)
             iocbs++;
     }
     return (iocbs);
 }
 
 /**
  * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
  * @vha: HA context
  *
  * Returns a pointer to the Continuation Type 0 IOCB packet.
  */
 static inline cont_entry_t *
 qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
 {
     cont_entry_t *cont_pkt;
     struct req_que *req = vha->req;
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else {
         req->ring_ptr++;
     }
 
     cont_pkt = (cont_entry_t *)req->ring_ptr;
 
     /* Load packet defaults. */
     put_unaligned_le32(CONTINUE_TYPE, &cont_pkt->entry_type);
 
     return (cont_pkt);
 }
 
 /**
  * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
  * @vha: HA context
  * @req: request queue
  *
  * Returns a pointer to the continuation type 1 IOCB packet.
  */
 cont_a64_entry_t *
 qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
 {
     cont_a64_entry_t *cont_pkt;
 
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else {
         req->ring_ptr++;
     }
 
     cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
 
     /* Load packet defaults. */
     put_unaligned_le32(IS_QLAFX00(vha->hw) ? CONTINUE_A64_TYPE_FX00 :
                CONTINUE_A64_TYPE, &cont_pkt->entry_type);
 
     return (cont_pkt);
 }
 
 inline int
 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 {
     struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 
     /* We always use DIFF Bundling for best performance */
     *fw_prot_opts = 0;
 
     /* Translate SCSI opcode to a protection opcode */
     switch (scsi_get_prot_op(cmd)) {
     case SCSI_PROT_READ_STRIP:
         *fw_prot_opts |= PO_MODE_DIF_REMOVE;
         break;
     case SCSI_PROT_WRITE_INSERT:
         *fw_prot_opts |= PO_MODE_DIF_INSERT;
         break;
     case SCSI_PROT_READ_INSERT:
         *fw_prot_opts |= PO_MODE_DIF_INSERT;
         break;
     case SCSI_PROT_WRITE_STRIP:
         *fw_prot_opts |= PO_MODE_DIF_REMOVE;
         break;
     case SCSI_PROT_READ_PASS:
     case SCSI_PROT_WRITE_PASS:
         if (cmd->prot_flags & SCSI_PROT_IP_CHECKSUM)
             *fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
         else
             *fw_prot_opts |= PO_MODE_DIF_PASS;
         break;
     default:    /* Normal Request */
         *fw_prot_opts |= PO_MODE_DIF_PASS;
         break;
     }
 
     if (!(cmd->prot_flags & SCSI_PROT_GUARD_CHECK))
         *fw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 
     return scsi_prot_sg_count(cmd);
 }
 
 /*
  * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
  * capable IOCB types.
  *
  * @sp: SRB command to process
  * @cmd_pkt: Command type 2 IOCB
  * @tot_dsds: Total number of segments to transfer
  */
 void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
     uint16_t tot_dsds)
 {
     uint16_t    avail_dsds;
     struct dsd32    *cur_dsd;
     scsi_qla_host_t *vha;
     struct scsi_cmnd *cmd;
     struct scatterlist *sg;
     int i;
 
     cmd = GET_CMD_SP(sp);
 
     /* Update entry type to indicate Command Type 2 IOCB */
     put_unaligned_le32(COMMAND_TYPE, &cmd_pkt->entry_type);
 
     /* No data transfer */
     if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return;
     }
 
     vha = sp->vha;
     cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 
     /* Three DSDs are available in the Command Type 2 IOCB */
     avail_dsds = ARRAY_SIZE(cmd_pkt->dsd32);
     cur_dsd = cmd_pkt->dsd32;
 
     /* Load data segments */
     scsi_for_each_sg(cmd, sg, tot_dsds, i) {
         cont_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
              * Seven DSDs are available in the Continuation
              * Type 0 IOCB.
              */
             cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
         }
 
         append_dsd32(&cur_dsd, sg);
         avail_dsds--;
     }
 }
 
 /**
  * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
  * capable IOCB types.
  *
  * @sp: SRB command to process
  * @cmd_pkt: Command type 3 IOCB
  * @tot_dsds: Total number of segments to transfer
  */
 void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
     uint16_t tot_dsds)
 {
     uint16_t    avail_dsds;
     struct dsd64    *cur_dsd;
     scsi_qla_host_t *vha;
     struct scsi_cmnd *cmd;
     struct scatterlist *sg;
     int i;
 
     cmd = GET_CMD_SP(sp);
 
     /* Update entry type to indicate Command Type 3 IOCB */
     put_unaligned_le32(COMMAND_A64_TYPE, &cmd_pkt->entry_type);
 
     /* No data transfer */
     if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return;
     }
 
     vha = sp->vha;
     cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
 
     /* Two DSDs are available in the Command Type 3 IOCB */
     avail_dsds = ARRAY_SIZE(cmd_pkt->dsd64);
     cur_dsd = cmd_pkt->dsd64;
 
     /* Load data segments */
     scsi_for_each_sg(cmd, sg, tot_dsds, i) {
         cont_a64_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
              * Five DSDs are available in the Continuation
              * Type 1 IOCB.
              */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
         }
 
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
 }
 
 /*
  * Find the first handle that is not in use, starting from
  * req->current_outstanding_cmd + 1. The caller must hold the lock that is
  * associated with @req.
  */
 uint32_t qla2xxx_get_next_handle(struct req_que *req)
 {
     uint32_t index, handle = req->current_outstanding_cmd;
 
     for (index = 1; index < req->num_outstanding_cmds; index++) {
         handle++;
         if (handle == req->num_outstanding_cmds)
             handle = 1;
         if (!req->outstanding_cmds[handle])
             return handle;
     }
 
     return 0;
 }
 
 /**
  * qla2x00_start_scsi() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 int
 qla2x00_start_scsi(srb_t *sp)
 {
     int     nseg;
     unsigned long   flags;
     scsi_qla_host_t *vha;
     struct scsi_cmnd *cmd;
     uint32_t    *clr_ptr;
     uint32_t    handle;
     cmd_entry_t *cmd_pkt;
     uint16_t    cnt;
     uint16_t    req_cnt;
     uint16_t    tot_dsds;
     struct device_reg_2xxx __iomem *reg;
     struct qla_hw_data *ha;
     struct req_que *req;
     struct rsp_que *rsp;
 
     /* Setup device pointers. */
     vha = sp->vha;
     ha = vha->hw;
     reg = &ha->iobase->isp;
     cmd = GET_CMD_SP(sp);
     req = ha->req_q_map[0];
     rsp = ha->rsp_q_map[0];
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
             QLA_SUCCESS) {
             return (QLA_FUNCTION_FAILED);
         }
         vha->marker_needed = 0;
     }
 
     /* Acquire ring specific lock */
     spin_lock_irqsave(&ha->hardware_lock, flags);
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
     } else
         nseg = 0;
 
     tot_dsds = nseg;
 
     /* Calculate the number of request entries needed. */
     req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
     if (req->cnt < (req_cnt + 2)) {
         cnt = rd_reg_word_relaxed(ISP_REQ_Q_OUT(ha, reg));
         if (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
         /* If still no head room then bail out */
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
     }
 
     /* Build command packet */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
 
     cmd_pkt = (cmd_entry_t *)req->ring_ptr;
     cmd_pkt->handle = handle;
     /* Zero out remaining portion of packet. */
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
     cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
     /* Set target ID and LUN number*/
     SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
     cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
     cmd_pkt->control_flags = cpu_to_le16(CF_SIMPLE_TAG);
 
     /* Load SCSI command packet. */
     memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
     cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
     /* Build IOCB segments */
     ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
 
     /* Set total data segment count. */
     cmd_pkt->entry_count = (uint8_t)req_cnt;
     wmb();
 
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->flags |= SRB_DMA_VALID;
 
     /* Set chip new ring index. */
     wrt_reg_word(ISP_REQ_Q_IN(ha, reg), req->ring_index);
     rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla2x00_process_response_queue(rsp);
 
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
     return (QLA_SUCCESS);
 
 queuing_error:
     if (tot_dsds)
         scsi_dma_unmap(cmd);
 
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return (QLA_FUNCTION_FAILED);
 }
 
 /**
  * qla2x00_start_iocbs() - Execute the IOCB command
  * @vha: HA context
  * @req: request queue
  */
 void
 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 {
     struct qla_hw_data *ha = vha->hw;
     device_reg_t *reg = ISP_QUE_REG(ha, req->id);
 
     if (IS_P3P_TYPE(ha)) {
         qla82xx_start_iocbs(vha);
     } else {
         /* Adjust ring index. */
         req->ring_index++;
         if (req->ring_index == req->length) {
             req->ring_index = 0;
             req->ring_ptr = req->ring;
         } else
             req->ring_ptr++;
 
         /* Set chip new ring index. */
         if (ha->mqenable || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
             wrt_reg_dword(req->req_q_in, req->ring_index);
         } else if (IS_QLA83XX(ha)) {
             wrt_reg_dword(req->req_q_in, req->ring_index);
             rd_reg_dword_relaxed(&ha->iobase->isp24.hccr);
         } else if (IS_QLAFX00(ha)) {
             wrt_reg_dword(&reg->ispfx00.req_q_in, req->ring_index);
             rd_reg_dword_relaxed(&reg->ispfx00.req_q_in);
             QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
         } else if (IS_FWI2_CAPABLE(ha)) {
             wrt_reg_dword(&reg->isp24.req_q_in, req->ring_index);
             rd_reg_dword_relaxed(&reg->isp24.req_q_in);
         } else {
             wrt_reg_word(ISP_REQ_Q_IN(ha, &reg->isp),
                 req->ring_index);
             rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, &reg->isp));
         }
     }
 }
 
 /**
  * __qla2x00_marker() - Send a marker IOCB to the firmware.
  * @vha: HA context
  * @qpair: queue pair pointer
  * @loop_id: loop ID
  * @lun: LUN
  * @type: marker modifier
  *
  * Can be called from both normal and interrupt context.
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 static int
 __qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
     uint16_t loop_id, uint64_t lun, uint8_t type)
 {
     mrk_entry_t *mrk;
     struct mrk_entry_24xx *mrk24 = NULL;
     struct req_que *req = qpair->req;
     struct qla_hw_data *ha = vha->hw;
     scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 
     mrk = (mrk_entry_t *)__qla2x00_alloc_iocbs(qpair, NULL);
     if (mrk == NULL) {
         ql_log(ql_log_warn, base_vha, 0x3026,
             "Failed to allocate Marker IOCB.\n");
 
         return (QLA_FUNCTION_FAILED);
     }
 
     mrk->entry_type = MARKER_TYPE;
     mrk->modifier = type;
     if (type != MK_SYNC_ALL) {
         if (IS_FWI2_CAPABLE(ha)) {
             mrk24 = (struct mrk_entry_24xx *) mrk;
             mrk24->nport_handle = cpu_to_le16(loop_id);
             int_to_scsilun(lun, (struct scsi_lun *)&mrk24->lun);
             host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
             mrk24->vp_index = vha->vp_idx;
             mrk24->handle = make_handle(req->id, mrk24->handle);
         } else {
             SET_TARGET_ID(ha, mrk->target, loop_id);
             mrk->lun = cpu_to_le16((uint16_t)lun);
         }
     }
     wmb();
 
     qla2x00_start_iocbs(vha, req);
 
     return (QLA_SUCCESS);
 }
 
 int
 qla2x00_marker(struct scsi_qla_host *vha, struct qla_qpair *qpair,
     uint16_t loop_id, uint64_t lun, uint8_t type)
 {
     int ret;
     unsigned long flags = 0;
 
     spin_lock_irqsave(qpair->qp_lock_ptr, flags);
     ret = __qla2x00_marker(vha, qpair, loop_id, lun, type);
     spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
 
     return (ret);
 }
 
 /*
  * qla2x00_issue_marker
  *
  * Issue marker
  * Caller CAN have hardware lock held as specified by ha_locked parameter.
  * Might release it, then reaquire.
  */
 int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
 {
     if (ha_locked) {
         if (__qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
                     MK_SYNC_ALL) != QLA_SUCCESS)
             return QLA_FUNCTION_FAILED;
     } else {
         if (qla2x00_marker(vha, vha->hw->base_qpair, 0, 0,
                     MK_SYNC_ALL) != QLA_SUCCESS)
             return QLA_FUNCTION_FAILED;
     }
     vha->marker_needed = 0;
 
     return QLA_SUCCESS;
 }
 
 static inline int
 qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
     uint16_t tot_dsds)
 {
     struct dsd64 *cur_dsd = NULL, *next_dsd;
     scsi_qla_host_t *vha;
     struct qla_hw_data *ha;
     struct scsi_cmnd *cmd;
     struct  scatterlist *cur_seg;
     uint8_t avail_dsds;
     uint8_t first_iocb = 1;
     uint32_t dsd_list_len;
     struct dsd_dma *dsd_ptr;
     struct ct6_dsd *ctx;
     struct qla_qpair *qpair = sp->qpair;
 
     cmd = GET_CMD_SP(sp);
 
     /* Update entry type to indicate Command Type 3 IOCB */
     put_unaligned_le32(COMMAND_TYPE_6, &cmd_pkt->entry_type);
 
     /* No data transfer */
     if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return 0;
     }
 
     vha = sp->vha;
     ha = vha->hw;
 
     /* Set transfer direction */
     if (cmd->sc_data_direction == DMA_TO_DEVICE) {
         cmd_pkt->control_flags = cpu_to_le16(CF_WRITE_DATA);
         qpair->counters.output_bytes += scsi_bufflen(cmd);
         qpair->counters.output_requests++;
     } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
         cmd_pkt->control_flags = cpu_to_le16(CF_READ_DATA);
         qpair->counters.input_bytes += scsi_bufflen(cmd);
         qpair->counters.input_requests++;
     }
 
     cur_seg = scsi_sglist(cmd);
     ctx = sp->u.scmd.ct6_ctx;
 
     while (tot_dsds) {
         avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
             QLA_DSDS_PER_IOCB : tot_dsds;
         tot_dsds -= avail_dsds;
         dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
 
         dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
             struct dsd_dma, list);
         next_dsd = dsd_ptr->dsd_addr;
         list_del(&dsd_ptr->list);
         ha->gbl_dsd_avail--;
         list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
         ctx->dsd_use_cnt++;
         ha->gbl_dsd_inuse++;
 
         if (first_iocb) {
             first_iocb = 0;
             put_unaligned_le64(dsd_ptr->dsd_list_dma,
                        &cmd_pkt->fcp_dsd.address);
             cmd_pkt->fcp_dsd.length = cpu_to_le32(dsd_list_len);
         } else {
             put_unaligned_le64(dsd_ptr->dsd_list_dma,
                        &cur_dsd->address);
             cur_dsd->length = cpu_to_le32(dsd_list_len);
             cur_dsd++;
         }
         cur_dsd = next_dsd;
         while (avail_dsds) {
             append_dsd64(&cur_dsd, cur_seg);
             cur_seg = sg_next(cur_seg);
             avail_dsds--;
         }
     }
 
     /* Null termination */
     cur_dsd->address = 0;
     cur_dsd->length = 0;
     cur_dsd++;
     cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
     return 0;
 }
 
 /*
  * qla24xx_calc_dsd_lists() - Determine number of DSD list required
  * for Command Type 6.
  *
  * @dsds: number of data segment descriptors needed
  *
  * Returns the number of dsd list needed to store @dsds.
  */
 static inline uint16_t
 qla24xx_calc_dsd_lists(uint16_t dsds)
 {
     uint16_t dsd_lists = 0;
 
     dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
     if (dsds % QLA_DSDS_PER_IOCB)
         dsd_lists++;
     return dsd_lists;
 }
 
 
 /**
  * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
  * IOCB types.
  *
  * @sp: SRB command to process
  * @cmd_pkt: Command type 3 IOCB
  * @tot_dsds: Total number of segments to transfer
  * @req: pointer to request queue
  */
 inline void
 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
     uint16_t tot_dsds, struct req_que *req)
 {
     uint16_t    avail_dsds;
     struct dsd64    *cur_dsd;
     scsi_qla_host_t *vha;
     struct scsi_cmnd *cmd;
     struct scatterlist *sg;
     int i;
     struct qla_qpair *qpair = sp->qpair;
 
     cmd = GET_CMD_SP(sp);
 
     /* Update entry type to indicate Command Type 3 IOCB */
     put_unaligned_le32(COMMAND_TYPE_7, &cmd_pkt->entry_type);
 
     /* No data transfer */
     if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return;
     }
 
     vha = sp->vha;
 
     /* Set transfer direction */
     if (cmd->sc_data_direction == DMA_TO_DEVICE) {
         cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_WRITE_DATA);
         qpair->counters.output_bytes += scsi_bufflen(cmd);
         qpair->counters.output_requests++;
     } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
         cmd_pkt->task_mgmt_flags = cpu_to_le16(TMF_READ_DATA);
         qpair->counters.input_bytes += scsi_bufflen(cmd);
         qpair->counters.input_requests++;
     }
 
     /* One DSD is available in the Command Type 3 IOCB */
     avail_dsds = 1;
     cur_dsd = &cmd_pkt->dsd;
 
     /* Load data segments */
 
     scsi_for_each_sg(cmd, sg, tot_dsds, i) {
         cont_a64_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
              * Five DSDs are available in the Continuation
              * Type 1 IOCB.
              */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = ARRAY_SIZE(cont_pkt->dsd);
         }
 
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
 }
 
 struct fw_dif_context {
     __le32  ref_tag;
     __le16  app_tag;
     uint8_t ref_tag_mask[4];    /* Validation/Replacement Mask*/
     uint8_t app_tag_mask[2];    /* Validation/Replacement Mask*/
 };
 
 /*
  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
  *
  */
 static inline void
 qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
     unsigned int protcnt)
 {
     struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 
     pkt->ref_tag = cpu_to_le32(scsi_prot_ref_tag(cmd));
 
     if (cmd->prot_flags & SCSI_PROT_REF_CHECK &&
         qla2x00_hba_err_chk_enabled(sp)) {
         pkt->ref_tag_mask[0] = 0xff;
         pkt->ref_tag_mask[1] = 0xff;
         pkt->ref_tag_mask[2] = 0xff;
         pkt->ref_tag_mask[3] = 0xff;
     }
 
     pkt->app_tag = cpu_to_le16(0);
     pkt->app_tag_mask[0] = 0x0;
     pkt->app_tag_mask[1] = 0x0;
 }
 
 int
 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
     uint32_t *partial)
 {
     struct scatterlist *sg;
     uint32_t cumulative_partial, sg_len;
     dma_addr_t sg_dma_addr;
 
     if (sgx->num_bytes == sgx->tot_bytes)
         return 0;
 
     sg = sgx->cur_sg;
     cumulative_partial = sgx->tot_partial;
 
     sg_dma_addr = sg_dma_address(sg);
     sg_len = sg_dma_len(sg);
 
     sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;
 
     if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
         sgx->dma_len = (blk_sz - cumulative_partial);
         sgx->tot_partial = 0;
         sgx->num_bytes += blk_sz;
         *partial = 0;
     } else {
         sgx->dma_len = sg_len - sgx->bytes_consumed;
         sgx->tot_partial += sgx->dma_len;
         *partial = 1;
     }
 
     sgx->bytes_consumed += sgx->dma_len;
 
     if (sg_len == sgx->bytes_consumed) {
         sg = sg_next(sg);
         sgx->num_sg++;
         sgx->cur_sg = sg;
         sgx->bytes_consumed = 0;
     }
 
     return 1;
 }
 
 int
 qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
     struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 {
     void *next_dsd;
     uint8_t avail_dsds = 0;
     uint32_t dsd_list_len;
     struct dsd_dma *dsd_ptr;
     struct scatterlist *sg_prot;
     struct dsd64 *cur_dsd = dsd;
     uint16_t    used_dsds = tot_dsds;
     uint32_t    prot_int; /* protection interval */
     uint32_t    partial;
     struct qla2_sgx sgx;
     dma_addr_t  sle_dma;
     uint32_t    sle_dma_len, tot_prot_dma_len = 0;
     struct scsi_cmnd *cmd;
 
     memset(&sgx, 0, sizeof(struct qla2_sgx));
     if (sp) {
         cmd = GET_CMD_SP(sp);
         prot_int = scsi_prot_interval(cmd);
 
         sgx.tot_bytes = scsi_bufflen(cmd);
         sgx.cur_sg = scsi_sglist(cmd);
         sgx.sp = sp;
 
         sg_prot = scsi_prot_sglist(cmd);
     } else if (tc) {
         prot_int      = tc->blk_sz;
         sgx.tot_bytes = tc->bufflen;
         sgx.cur_sg    = tc->sg;
         sg_prot       = tc->prot_sg;
     } else {
         BUG();
         return 1;
     }
 
     while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {
 
         sle_dma = sgx.dma_addr;
         sle_dma_len = sgx.dma_len;
 alloc_and_fill:
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
                     QLA_DSDS_PER_IOCB : used_dsds;
             dsd_list_len = (avail_dsds + 1) * 12;
             used_dsds -= avail_dsds;
 
             /* allocate tracking DS */
             dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
             if (!dsd_ptr)
                 return 1;
 
             /* allocate new list */
             dsd_ptr->dsd_addr = next_dsd =
                 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
                 &dsd_ptr->dsd_list_dma);
 
             if (!next_dsd) {
                 /*
                  * Need to cleanup only this dsd_ptr, rest
                  * will be done by sp_free_dma()
                  */
                 kfree(dsd_ptr);
                 return 1;
             }
 
             if (sp) {
                 list_add_tail(&dsd_ptr->list,
                           &sp->u.scmd.crc_ctx->dsd_list);
 
                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
             } else {
                 list_add_tail(&dsd_ptr->list,
                     &(tc->ctx->dsd_list));
                 *tc->ctx_dsd_alloced = 1;
             }
 
 
             /* add new list to cmd iocb or last list */
             put_unaligned_le64(dsd_ptr->dsd_list_dma,
                        &cur_dsd->address);
             cur_dsd->length = cpu_to_le32(dsd_list_len);
             cur_dsd = next_dsd;
         }
         put_unaligned_le64(sle_dma, &cur_dsd->address);
         cur_dsd->length = cpu_to_le32(sle_dma_len);
         cur_dsd++;
         avail_dsds--;
 
         if (partial == 0) {
             /* Got a full protection interval */
             sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
             sle_dma_len = 8;
 
             tot_prot_dma_len += sle_dma_len;
             if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
                 tot_prot_dma_len = 0;
                 sg_prot = sg_next(sg_prot);
             }
 
             partial = 1; /* So as to not re-enter this block */
             goto alloc_and_fill;
         }
     }
     /* Null termination */
     cur_dsd->address = 0;
     cur_dsd->length = 0;
     cur_dsd++;
     return 0;
 }
 
 int
 qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp,
     struct dsd64 *dsd, uint16_t tot_dsds, struct qla_tc_param *tc)
 {
     void *next_dsd;
     uint8_t avail_dsds = 0;
     uint32_t dsd_list_len;
     struct dsd_dma *dsd_ptr;
     struct scatterlist *sg, *sgl;
     struct dsd64 *cur_dsd = dsd;
     int i;
     uint16_t    used_dsds = tot_dsds;
     struct scsi_cmnd *cmd;
 
     if (sp) {
         cmd = GET_CMD_SP(sp);
         sgl = scsi_sglist(cmd);
     } else if (tc) {
         sgl = tc->sg;
     } else {
         BUG();
         return 1;
     }
 
 
     for_each_sg(sgl, sg, tot_dsds, i) {
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
                     QLA_DSDS_PER_IOCB : used_dsds;
             dsd_list_len = (avail_dsds + 1) * 12;
             used_dsds -= avail_dsds;
 
             /* allocate tracking DS */
             dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
             if (!dsd_ptr)
                 return 1;
 
             /* allocate new list */
             dsd_ptr->dsd_addr = next_dsd =
                 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
                 &dsd_ptr->dsd_list_dma);
 
             if (!next_dsd) {
                 /*
                  * Need to cleanup only this dsd_ptr, rest
                  * will be done by sp_free_dma()
                  */
                 kfree(dsd_ptr);
                 return 1;
             }
 
             if (sp) {
                 list_add_tail(&dsd_ptr->list,
                           &sp->u.scmd.crc_ctx->dsd_list);
 
                 sp->flags |= SRB_CRC_CTX_DSD_VALID;
             } else {
                 list_add_tail(&dsd_ptr->list,
                     &(tc->ctx->dsd_list));
                 *tc->ctx_dsd_alloced = 1;
             }
 
             /* add new list to cmd iocb or last list */
             put_unaligned_le64(dsd_ptr->dsd_list_dma,
                        &cur_dsd->address);
             cur_dsd->length = cpu_to_le32(dsd_list_len);
             cur_dsd = next_dsd;
         }
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
 
     }
     /* Null termination */
     cur_dsd->address = 0;
     cur_dsd->length = 0;
     cur_dsd++;
     return 0;
 }
 
 int
 qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
     struct dsd64 *cur_dsd, uint16_t tot_dsds, struct qla_tgt_cmd *tc)
 {
     struct dsd_dma *dsd_ptr = NULL, *dif_dsd, *nxt_dsd;
     struct scatterlist *sg, *sgl;
     struct crc_context *difctx = NULL;
     struct scsi_qla_host *vha;
     uint dsd_list_len;
     uint avail_dsds = 0;
     uint used_dsds = tot_dsds;
     bool dif_local_dma_alloc = false;
     bool direction_to_device = false;
     int i;
 
     if (sp) {
         struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 
         sgl = scsi_prot_sglist(cmd);
         vha = sp->vha;
         difctx = sp->u.scmd.crc_ctx;
         direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
           "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
             __func__, cmd, difctx, sp);
     } else if (tc) {
         vha = tc->vha;
         sgl = tc->prot_sg;
         difctx = tc->ctx;
         direction_to_device = tc->dma_data_direction == DMA_TO_DEVICE;
     } else {
         BUG();
         return 1;
     }
 
     ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
         "%s: enter (write=%u)\n", __func__, direction_to_device);
 
     /* if initiator doing write or target doing read */
     if (direction_to_device) {
         for_each_sg(sgl, sg, tot_dsds, i) {
             u64 sle_phys = sg_phys(sg);
 
             /* If SGE addr + len flips bits in upper 32-bits */
             if (MSD(sle_phys + sg->length) ^ MSD(sle_phys)) {
                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe022,
                     "%s: page boundary crossing (phys=%llx len=%x)\n",
                     __func__, sle_phys, sg->length);
 
                 if (difctx) {
                     ha->dif_bundle_crossed_pages++;
                     dif_local_dma_alloc = true;
                 } else {
                     ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
                         vha, 0xe022,
                         "%s: difctx pointer is NULL\n",
                         __func__);
                 }
                 break;
             }
         }
         ha->dif_bundle_writes++;
     } else {
         ha->dif_bundle_reads++;
     }
 
     if (ql2xdifbundlinginternalbuffers)
         dif_local_dma_alloc = direction_to_device;
 
     if (dif_local_dma_alloc) {
         u32 track_difbundl_buf = 0;
         u32 ldma_sg_len = 0;
         u8 ldma_needed = 1;
 
         difctx->no_dif_bundl = 0;
         difctx->dif_bundl_len = 0;
 
         /* Track DSD buffers */
         INIT_LIST_HEAD(&difctx->ldif_dsd_list);
         /* Track local DMA buffers */
         INIT_LIST_HEAD(&difctx->ldif_dma_hndl_list);
 
         for_each_sg(sgl, sg, tot_dsds, i) {
             u32 sglen = sg_dma_len(sg);
 
             ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe023,
                 "%s: sg[%x] (phys=%llx sglen=%x) ldma_sg_len: %x dif_bundl_len: %x ldma_needed: %x\n",
                 __func__, i, (u64)sg_phys(sg), sglen, ldma_sg_len,
                 difctx->dif_bundl_len, ldma_needed);
 
             while (sglen) {
                 u32 xfrlen = 0;
 
                 if (ldma_needed) {
                     /*
                      * Allocate list item to store
                      * the DMA buffers
                      */
                     dsd_ptr = kzalloc(sizeof(*dsd_ptr),
                         GFP_ATOMIC);
                     if (!dsd_ptr) {
                         ql_dbg(ql_dbg_tgt, vha, 0xe024,
                             "%s: failed alloc dsd_ptr\n",
                             __func__);
                         return 1;
                     }
                     ha->dif_bundle_kallocs++;
 
                     /* allocate dma buffer */
                     dsd_ptr->dsd_addr = dma_pool_alloc
                         (ha->dif_bundl_pool, GFP_ATOMIC,
                          &dsd_ptr->dsd_list_dma);
                     if (!dsd_ptr->dsd_addr) {
                         ql_dbg(ql_dbg_tgt, vha, 0xe024,
                             "%s: failed alloc ->dsd_ptr\n",
                             __func__);
                         /*
                          * need to cleanup only this
                          * dsd_ptr rest will be done
                          * by sp_free_dma()
                          */
                         kfree(dsd_ptr);
                         ha->dif_bundle_kallocs--;
                         return 1;
                     }
                     ha->dif_bundle_dma_allocs++;
                     ldma_needed = 0;
                     difctx->no_dif_bundl++;
                     list_add_tail(&dsd_ptr->list,
                         &difctx->ldif_dma_hndl_list);
                 }
 
                 /* xfrlen is min of dma pool size and sglen */
                 xfrlen = (sglen >
                    (DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len)) ?
                     DIF_BUNDLING_DMA_POOL_SIZE - ldma_sg_len :
                     sglen;
 
                 /* replace with local allocated dma buffer */
                 sg_pcopy_to_buffer(sgl, sg_nents(sgl),
                     dsd_ptr->dsd_addr + ldma_sg_len, xfrlen,
                     difctx->dif_bundl_len);
                 difctx->dif_bundl_len += xfrlen;
                 sglen -= xfrlen;
                 ldma_sg_len += xfrlen;
                 if (ldma_sg_len == DIF_BUNDLING_DMA_POOL_SIZE ||
                     sg_is_last(sg)) {
                     ldma_needed = 1;
                     ldma_sg_len = 0;
                 }
             }
         }
 
         track_difbundl_buf = used_dsds = difctx->no_dif_bundl;
         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe025,
             "dif_bundl_len=%x, no_dif_bundl=%x track_difbundl_buf: %x\n",
             difctx->dif_bundl_len, difctx->no_dif_bundl,
             track_difbundl_buf);
 
         if (sp)
             sp->flags |= SRB_DIF_BUNDL_DMA_VALID;
         else
             tc->prot_flags = DIF_BUNDL_DMA_VALID;
 
         list_for_each_entry_safe(dif_dsd, nxt_dsd,
             &difctx->ldif_dma_hndl_list, list) {
             u32 sglen = (difctx->dif_bundl_len >
                 DIF_BUNDLING_DMA_POOL_SIZE) ?
                 DIF_BUNDLING_DMA_POOL_SIZE : difctx->dif_bundl_len;
 
             BUG_ON(track_difbundl_buf == 0);
 
             /* Allocate additional continuation packets? */
             if (avail_dsds == 0) {
                 ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha,
                     0xe024,
                     "%s: adding continuation iocb's\n",
                     __func__);
                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
                     QLA_DSDS_PER_IOCB : used_dsds;
                 dsd_list_len = (avail_dsds + 1) * 12;
                 used_dsds -= avail_dsds;
 
                 /* allocate tracking DS */
                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
                 if (!dsd_ptr) {
                     ql_dbg(ql_dbg_tgt, vha, 0xe026,
                         "%s: failed alloc dsd_ptr\n",
                         __func__);
                     return 1;
                 }
                 ha->dif_bundle_kallocs++;
 
                 difctx->no_ldif_dsd++;
                 /* allocate new list */
                 dsd_ptr->dsd_addr =
                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
                     &dsd_ptr->dsd_list_dma);
                 if (!dsd_ptr->dsd_addr) {
                     ql_dbg(ql_dbg_tgt, vha, 0xe026,
                         "%s: failed alloc ->dsd_addr\n",
                         __func__);
                     /*
                      * need to cleanup only this dsd_ptr
                      *  rest will be done by sp_free_dma()
                      */
                     kfree(dsd_ptr);
                     ha->dif_bundle_kallocs--;
                     return 1;
                 }
                 ha->dif_bundle_dma_allocs++;
 
                 if (sp) {
                     list_add_tail(&dsd_ptr->list,
                         &difctx->ldif_dsd_list);
                     sp->flags |= SRB_CRC_CTX_DSD_VALID;
                 } else {
                     list_add_tail(&dsd_ptr->list,
                         &difctx->ldif_dsd_list);
                     tc->ctx_dsd_alloced = 1;
                 }
 
                 /* add new list to cmd iocb or last list */
                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
                            &cur_dsd->address);
                 cur_dsd->length = cpu_to_le32(dsd_list_len);
                 cur_dsd = dsd_ptr->dsd_addr;
             }
             put_unaligned_le64(dif_dsd->dsd_list_dma,
                        &cur_dsd->address);
             cur_dsd->length = cpu_to_le32(sglen);
             cur_dsd++;
             avail_dsds--;
             difctx->dif_bundl_len -= sglen;
             track_difbundl_buf--;
         }
 
         ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe026,
             "%s: no_ldif_dsd:%x, no_dif_bundl:%x\n", __func__,
             difctx->no_ldif_dsd, difctx->no_dif_bundl);
     } else {
         for_each_sg(sgl, sg, tot_dsds, i) {
             /* Allocate additional continuation packets? */
             if (avail_dsds == 0) {
                 avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
                     QLA_DSDS_PER_IOCB : used_dsds;
                 dsd_list_len = (avail_dsds + 1) * 12;
                 used_dsds -= avail_dsds;
 
                 /* allocate tracking DS */
                 dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
                 if (!dsd_ptr) {
                     ql_dbg(ql_dbg_tgt + ql_dbg_verbose,
                         vha, 0xe027,
                         "%s: failed alloc dsd_dma...\n",
                         __func__);
                     return 1;
                 }
 
                 /* allocate new list */
                 dsd_ptr->dsd_addr =
                     dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
                     &dsd_ptr->dsd_list_dma);
                 if (!dsd_ptr->dsd_addr) {
                     /* need to cleanup only this dsd_ptr */
                     /* rest will be done by sp_free_dma() */
                     kfree(dsd_ptr);
                     return 1;
                 }
 
                 if (sp) {
                     list_add_tail(&dsd_ptr->list,
                         &difctx->dsd_list);
                     sp->flags |= SRB_CRC_CTX_DSD_VALID;
                 } else {
                     list_add_tail(&dsd_ptr->list,
                         &difctx->dsd_list);
                     tc->ctx_dsd_alloced = 1;
                 }
 
                 /* add new list to cmd iocb or last list */
                 put_unaligned_le64(dsd_ptr->dsd_list_dma,
                            &cur_dsd->address);
                 cur_dsd->length = cpu_to_le32(dsd_list_len);
                 cur_dsd = dsd_ptr->dsd_addr;
             }
             append_dsd64(&cur_dsd, sg);
             avail_dsds--;
         }
     }
     /* Null termination */
     cur_dsd->address = 0;
     cur_dsd->length = 0;
     cur_dsd++;
     return 0;
 }
 
 /**
  * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
  *                          Type 6 IOCB types.
  *
  * @sp: SRB command to process
  * @cmd_pkt: Command type 3 IOCB
  * @tot_dsds: Total number of segments to transfer
  * @tot_prot_dsds: Total number of segments with protection information
  * @fw_prot_opts: Protection options to be passed to firmware
  */
 static inline int
 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
 {
     struct dsd64        *cur_dsd;
     __be32          *fcp_dl;
     scsi_qla_host_t     *vha;
     struct scsi_cmnd    *cmd;
     uint32_t        total_bytes = 0;
     uint32_t        data_bytes;
     uint32_t        dif_bytes;
     uint8_t         bundling = 1;
     uint16_t        blk_size;
     struct crc_context  *crc_ctx_pkt = NULL;
     struct qla_hw_data  *ha;
     uint8_t         additional_fcpcdb_len;
     uint16_t        fcp_cmnd_len;
     struct fcp_cmnd     *fcp_cmnd;
     dma_addr_t      crc_ctx_dma;
 
     cmd = GET_CMD_SP(sp);
 
     /* Update entry type to indicate Command Type CRC_2 IOCB */
     put_unaligned_le32(COMMAND_TYPE_CRC_2, &cmd_pkt->entry_type);
 
     vha = sp->vha;
     ha = vha->hw;
 
     /* No data transfer */
     data_bytes = scsi_bufflen(cmd);
     if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return QLA_SUCCESS;
     }
 
     cmd_pkt->vp_index = sp->vha->vp_idx;
 
     /* Set transfer direction */
     if (cmd->sc_data_direction == DMA_TO_DEVICE) {
         cmd_pkt->control_flags =
             cpu_to_le16(CF_WRITE_DATA);
     } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
         cmd_pkt->control_flags =
             cpu_to_le16(CF_READ_DATA);
     }
 
     if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
         (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
         (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
         (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
         bundling = 0;
 
     /* Allocate CRC context from global pool */
     crc_ctx_pkt = sp->u.scmd.crc_ctx =
         dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
 
     if (!crc_ctx_pkt)
         goto crc_queuing_error;
 
     crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
 
     sp->flags |= SRB_CRC_CTX_DMA_VALID;
 
     /* Set handle */
     crc_ctx_pkt->handle = cmd_pkt->handle;
 
     INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
 
     qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
         &crc_ctx_pkt->ref_tag, tot_prot_dsds);
 
     put_unaligned_le64(crc_ctx_dma, &cmd_pkt->crc_context_address);
     cmd_pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
 
     /* Determine SCSI command length -- align to 4 byte boundary */
     if (cmd->cmd_len > 16) {
         additional_fcpcdb_len = cmd->cmd_len - 16;
         if ((cmd->cmd_len % 4) != 0) {
             /* SCSI cmd > 16 bytes must be multiple of 4 */
             goto crc_queuing_error;
         }
         fcp_cmnd_len = 12 + cmd->cmd_len + 4;
     } else {
         additional_fcpcdb_len = 0;
         fcp_cmnd_len = 12 + 16 + 4;
     }
 
     fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;
 
     fcp_cmnd->additional_cdb_len = additional_fcpcdb_len;
     if (cmd->sc_data_direction == DMA_TO_DEVICE)
         fcp_cmnd->additional_cdb_len |= 1;
     else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
         fcp_cmnd->additional_cdb_len |= 2;
 
     int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
     memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
     cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
     put_unaligned_le64(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF,
                &cmd_pkt->fcp_cmnd_dseg_address);
     fcp_cmnd->task_management = 0;
     fcp_cmnd->task_attribute = TSK_SIMPLE;
 
     cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */
 
     /* Compute dif len and adjust data len to incude protection */
     dif_bytes = 0;
     blk_size = cmd->device->sector_size;
     dif_bytes = (data_bytes / blk_size) * 8;
 
     switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
     case SCSI_PROT_READ_INSERT:
     case SCSI_PROT_WRITE_STRIP:
         total_bytes = data_bytes;
         data_bytes += dif_bytes;
         break;
 
     case SCSI_PROT_READ_STRIP:
     case SCSI_PROT_WRITE_INSERT:
     case SCSI_PROT_READ_PASS:
     case SCSI_PROT_WRITE_PASS:
         total_bytes = data_bytes + dif_bytes;
         break;
     default:
         BUG();
     }
 
     if (!qla2x00_hba_err_chk_enabled(sp))
         fw_prot_opts |= 0x10; /* Disable Guard tag checking */
     /* HBA error checking enabled */
     else if (IS_PI_UNINIT_CAPABLE(ha)) {
         if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
             || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
             SCSI_PROT_DIF_TYPE2))
             fw_prot_opts |= BIT_10;
         else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
             SCSI_PROT_DIF_TYPE3)
             fw_prot_opts |= BIT_11;
     }
 
     if (!bundling) {
         cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
     } else {
         /*
          * Configure Bundling if we need to fetch interlaving
          * protection PCI accesses
          */
         fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
         crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
         crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
                             tot_prot_dsds);
         cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
     }
 
     /* Finish the common fields of CRC pkt */
     crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
     crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
     crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
     crc_ctx_pkt->guard_seed = cpu_to_le16(0);
     /* Fibre channel byte count */
     cmd_pkt->byte_count = cpu_to_le32(total_bytes);
     fcp_dl = (__be32 *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
         additional_fcpcdb_len);
     *fcp_dl = htonl(total_bytes);
 
     if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
         cmd_pkt->byte_count = cpu_to_le32(0);
         return QLA_SUCCESS;
     }
     /* Walks data segments */
 
     cmd_pkt->control_flags |= cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
 
     if (!bundling && tot_prot_dsds) {
         if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
             cur_dsd, tot_dsds, NULL))
             goto crc_queuing_error;
     } else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
             (tot_dsds - tot_prot_dsds), NULL))
         goto crc_queuing_error;
 
     if (bundling && tot_prot_dsds) {
         /* Walks dif segments */
         cmd_pkt->control_flags |= cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
         cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
         if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
                 tot_prot_dsds, NULL))
             goto crc_queuing_error;
     }
     return QLA_SUCCESS;
 
 crc_queuing_error:
     /* Cleanup will be performed by the caller */
 
     return QLA_FUNCTION_FAILED;
 }
 
 /**
  * qla24xx_start_scsi() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 int
 qla24xx_start_scsi(srb_t *sp)
 {
     int     nseg;
     unsigned long   flags;
     uint32_t    *clr_ptr;
     uint32_t    handle;
     struct cmd_type_7 *cmd_pkt;
     uint16_t    cnt;
     uint16_t    req_cnt;
     uint16_t    tot_dsds;
     struct req_que *req = NULL;
     struct rsp_que *rsp;
     struct scsi_cmnd *cmd = GET_CMD_SP(sp);
     struct scsi_qla_host *vha = sp->vha;
     struct qla_hw_data *ha = vha->hw;
 
     if (sp->fcport->edif.enable  && (sp->fcport->flags & FCF_FCSP_DEVICE))
         return qla28xx_start_scsi_edif(sp);
 
     /* Setup device pointers. */
     req = vha->req;
     rsp = req->rsp;
 
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
             QLA_SUCCESS)
             return QLA_FUNCTION_FAILED;
         vha->marker_needed = 0;
     }
 
     /* Acquire ring specific lock */
     spin_lock_irqsave(&ha->hardware_lock, flags);
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
     } else
         nseg = 0;
 
     tot_dsds = nseg;
     req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
 
     sp->iores.res_type = RESOURCE_INI;
     sp->iores.iocb_cnt = req_cnt;
     if (qla_get_iocbs(sp->qpair, &sp->iores))
         goto queuing_error;
 
     if (req->cnt < (req_cnt + 2)) {
         if (IS_SHADOW_REG_CAPABLE(ha)) {
             cnt = *req->out_ptr;
         } else {
             cnt = rd_reg_dword_relaxed(req->req_q_out);
             if (qla2x00_check_reg16_for_disconnect(vha, cnt))
                 goto queuing_error;
         }
 
         if (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
     }
 
     /* Build command packet. */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
 
     cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
     cmd_pkt->handle = make_handle(req->id, handle);
 
     /* Zero out remaining portion of packet. */
     /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
     cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
     /* Set NPORT-ID and LUN number*/
     cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
     cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
     cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
     cmd_pkt->vp_index = sp->vha->vp_idx;
 
     int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
     host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
 
     cmd_pkt->task = TSK_SIMPLE;
 
     /* Load SCSI command packet. */
     memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
     host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
 
     cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
     /* Build IOCB segments */
     qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
 
     /* Set total data segment count. */
     cmd_pkt->entry_count = (uint8_t)req_cnt;
     wmb();
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->qpair->cmd_cnt++;
     sp->flags |= SRB_DMA_VALID;
 
     /* Set chip new ring index. */
     wrt_reg_dword(req->req_q_in, req->ring_index);
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla24xx_process_response_queue(vha, rsp);
 
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
     return QLA_SUCCESS;
 
 queuing_error:
     if (tot_dsds)
         scsi_dma_unmap(cmd);
 
     qla_put_iocbs(sp->qpair, &sp->iores);
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return QLA_FUNCTION_FAILED;
 }
 
 /**
  * qla24xx_dif_start_scsi() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 int
 qla24xx_dif_start_scsi(srb_t *sp)
 {
     int         nseg;
     unsigned long       flags;
     uint32_t        *clr_ptr;
     uint32_t        handle;
     uint16_t        cnt;
     uint16_t        req_cnt = 0;
     uint16_t        tot_dsds;
     uint16_t        tot_prot_dsds;
     uint16_t        fw_prot_opts = 0;
     struct req_que      *req = NULL;
     struct rsp_que      *rsp = NULL;
     struct scsi_cmnd    *cmd = GET_CMD_SP(sp);
     struct scsi_qla_host    *vha = sp->vha;
     struct qla_hw_data  *ha = vha->hw;
     struct cmd_type_crc_2   *cmd_pkt;
     uint32_t        status = 0;
 
 #define QDSS_GOT_Q_SPACE    BIT_0
 
     /* Only process protection or >16 cdb in this routine */
     if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
         if (cmd->cmd_len <= 16)
             return qla24xx_start_scsi(sp);
     }
 
     /* Setup device pointers. */
     req = vha->req;
     rsp = req->rsp;
 
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (qla2x00_marker(vha, ha->base_qpair, 0, 0, MK_SYNC_ALL) !=
             QLA_SUCCESS)
             return QLA_FUNCTION_FAILED;
         vha->marker_needed = 0;
     }
 
     /* Acquire ring specific lock */
     spin_lock_irqsave(&ha->hardware_lock, flags);
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Compute number of required data segments */
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
         else
             sp->flags |= SRB_DMA_VALID;
 
         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
             struct qla2_sgx sgx;
             uint32_t    partial;
 
             memset(&sgx, 0, sizeof(struct qla2_sgx));
             sgx.tot_bytes = scsi_bufflen(cmd);
             sgx.cur_sg = scsi_sglist(cmd);
             sgx.sp = sp;
 
             nseg = 0;
             while (qla24xx_get_one_block_sg(
                 cmd->device->sector_size, &sgx, &partial))
                 nseg++;
         }
     } else
         nseg = 0;
 
     /* number of required data segments */
     tot_dsds = nseg;
 
     /* Compute number of required protection segments */
     if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
             scsi_prot_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
         else
             sp->flags |= SRB_CRC_PROT_DMA_VALID;
 
         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
             nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
         }
     } else {
         nseg = 0;
     }
 
     req_cnt = 1;
     /* Total Data and protection sg segment(s) */
     tot_prot_dsds = nseg;
     tot_dsds += nseg;
 
     sp->iores.res_type = RESOURCE_INI;
     sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
     if (qla_get_iocbs(sp->qpair, &sp->iores))
         goto queuing_error;
 
     if (req->cnt < (req_cnt + 2)) {
         if (IS_SHADOW_REG_CAPABLE(ha)) {
             cnt = *req->out_ptr;
         } else {
             cnt = rd_reg_dword_relaxed(req->req_q_out);
             if (qla2x00_check_reg16_for_disconnect(vha, cnt))
                 goto queuing_error;
         }
         if (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
     }
 
     status |= QDSS_GOT_Q_SPACE;
 
     /* Build header part of command packet (excluding the OPCODE). */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
 
     /* Fill-in common area */
     cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
     cmd_pkt->handle = make_handle(req->id, handle);
 
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 
     /* Set NPORT-ID and LUN number*/
     cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
     cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
     cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
 
     int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
     host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
 
     /* Total Data and protection segment(s) */
     cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
     /* Build IOCB segments and adjust for data protection segments */
     if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
         req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
         QLA_SUCCESS)
         goto queuing_error;
 
     cmd_pkt->entry_count = (uint8_t)req_cnt;
     /* Specify response queue number where completion should happen */
     cmd_pkt->entry_status = (uint8_t) rsp->id;
     cmd_pkt->timeout = cpu_to_le16(0);
     wmb();
 
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->qpair->cmd_cnt++;
     /* Set chip new ring index. */
     wrt_reg_dword(req->req_q_in, req->ring_index);
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla24xx_process_response_queue(vha, rsp);
 
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return QLA_SUCCESS;
 
 queuing_error:
     if (status & QDSS_GOT_Q_SPACE) {
         req->outstanding_cmds[handle] = NULL;
         req->cnt += req_cnt;
     }
     /* Cleanup will be performed by the caller (queuecommand) */
 
     qla_put_iocbs(sp->qpair, &sp->iores);
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return QLA_FUNCTION_FAILED;
 }
 
 /**
  * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 static int
 qla2xxx_start_scsi_mq(srb_t *sp)
 {
     int     nseg;
     unsigned long   flags;
     uint32_t    *clr_ptr;
     uint32_t    handle;
     struct cmd_type_7 *cmd_pkt;
     uint16_t    cnt;
     uint16_t    req_cnt;
     uint16_t    tot_dsds;
     struct req_que *req = NULL;
     struct rsp_que *rsp;
     struct scsi_cmnd *cmd = GET_CMD_SP(sp);
     struct scsi_qla_host *vha = sp->fcport->vha;
     struct qla_hw_data *ha = vha->hw;
     struct qla_qpair *qpair = sp->qpair;
 
     if (sp->fcport->edif.enable && (sp->fcport->flags & FCF_FCSP_DEVICE))
         return qla28xx_start_scsi_edif(sp);
 
     /* Acquire qpair specific lock */
     spin_lock_irqsave(&qpair->qp_lock, flags);
 
     /* Setup qpair pointers */
     req = qpair->req;
     rsp = qpair->rsp;
 
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
             QLA_SUCCESS) {
             spin_unlock_irqrestore(&qpair->qp_lock, flags);
             return QLA_FUNCTION_FAILED;
         }
         vha->marker_needed = 0;
     }
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
     } else
         nseg = 0;
 
     tot_dsds = nseg;
     req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
 
     sp->iores.res_type = RESOURCE_INI;
     sp->iores.iocb_cnt = req_cnt;
     if (qla_get_iocbs(sp->qpair, &sp->iores))
         goto queuing_error;
 
     if (req->cnt < (req_cnt + 2)) {
         if (IS_SHADOW_REG_CAPABLE(ha)) {
             cnt = *req->out_ptr;
         } else {
             cnt = rd_reg_dword_relaxed(req->req_q_out);
             if (qla2x00_check_reg16_for_disconnect(vha, cnt))
                 goto queuing_error;
         }
 
         if (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
     }
 
     /* Build command packet. */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
 
     cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
     cmd_pkt->handle = make_handle(req->id, handle);
 
     /* Zero out remaining portion of packet. */
     /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
     cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
     /* Set NPORT-ID and LUN number*/
     cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
     cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
     cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
     cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
 
     int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
     host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
 
     cmd_pkt->task = TSK_SIMPLE;
 
     /* Load SCSI command packet. */
     memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
     host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
 
     cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
     /* Build IOCB segments */
     qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
 
     /* Set total data segment count. */
     cmd_pkt->entry_count = (uint8_t)req_cnt;
     wmb();
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->qpair->cmd_cnt++;
     sp->flags |= SRB_DMA_VALID;
 
     /* Set chip new ring index. */
     wrt_reg_dword(req->req_q_in, req->ring_index);
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla24xx_process_response_queue(vha, rsp);
 
     spin_unlock_irqrestore(&qpair->qp_lock, flags);
     return QLA_SUCCESS;
 
 queuing_error:
     if (tot_dsds)
         scsi_dma_unmap(cmd);
 
     qla_put_iocbs(sp->qpair, &sp->iores);
     spin_unlock_irqrestore(&qpair->qp_lock, flags);
 
     return QLA_FUNCTION_FAILED;
 }
 
 
 /**
  * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 int
 qla2xxx_dif_start_scsi_mq(srb_t *sp)
 {
     int         nseg;
     unsigned long       flags;
     uint32_t        *clr_ptr;
     uint32_t        handle;
     uint16_t        cnt;
     uint16_t        req_cnt = 0;
     uint16_t        tot_dsds;
     uint16_t        tot_prot_dsds;
     uint16_t        fw_prot_opts = 0;
     struct req_que      *req = NULL;
     struct rsp_que      *rsp = NULL;
     struct scsi_cmnd    *cmd = GET_CMD_SP(sp);
     struct scsi_qla_host    *vha = sp->fcport->vha;
     struct qla_hw_data  *ha = vha->hw;
     struct cmd_type_crc_2   *cmd_pkt;
     uint32_t        status = 0;
     struct qla_qpair    *qpair = sp->qpair;
 
 #define QDSS_GOT_Q_SPACE    BIT_0
 
     /* Check for host side state */
     if (!qpair->online) {
         cmd->result = DID_NO_CONNECT << 16;
         return QLA_INTERFACE_ERROR;
     }
 
     if (!qpair->difdix_supported &&
         scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
         cmd->result = DID_NO_CONNECT << 16;
         return QLA_INTERFACE_ERROR;
     }
 
     /* Only process protection or >16 cdb in this routine */
     if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
         if (cmd->cmd_len <= 16)
             return qla2xxx_start_scsi_mq(sp);
     }
 
     spin_lock_irqsave(&qpair->qp_lock, flags);
 
     /* Setup qpair pointers */
     rsp = qpair->rsp;
     req = qpair->req;
 
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) !=
             QLA_SUCCESS) {
             spin_unlock_irqrestore(&qpair->qp_lock, flags);
             return QLA_FUNCTION_FAILED;
         }
         vha->marker_needed = 0;
     }
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Compute number of required data segments */
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
         else
             sp->flags |= SRB_DMA_VALID;
 
         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
             struct qla2_sgx sgx;
             uint32_t    partial;
 
             memset(&sgx, 0, sizeof(struct qla2_sgx));
             sgx.tot_bytes = scsi_bufflen(cmd);
             sgx.cur_sg = scsi_sglist(cmd);
             sgx.sp = sp;
 
             nseg = 0;
             while (qla24xx_get_one_block_sg(
                 cmd->device->sector_size, &sgx, &partial))
                 nseg++;
         }
     } else
         nseg = 0;
 
     /* number of required data segments */
     tot_dsds = nseg;
 
     /* Compute number of required protection segments */
     if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
             scsi_prot_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
         else
             sp->flags |= SRB_CRC_PROT_DMA_VALID;
 
         if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
             (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
             nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
         }
     } else {
         nseg = 0;
     }
 
     req_cnt = 1;
     /* Total Data and protection sg segment(s) */
     tot_prot_dsds = nseg;
     tot_dsds += nseg;
 
     sp->iores.res_type = RESOURCE_INI;
     sp->iores.iocb_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
     if (qla_get_iocbs(sp->qpair, &sp->iores))
         goto queuing_error;
 
     if (req->cnt < (req_cnt + 2)) {
         if (IS_SHADOW_REG_CAPABLE(ha)) {
             cnt = *req->out_ptr;
         } else {
             cnt = rd_reg_dword_relaxed(req->req_q_out);
             if (qla2x00_check_reg16_for_disconnect(vha, cnt))
                 goto queuing_error;
         }
 
         if (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
     }
 
     status |= QDSS_GOT_Q_SPACE;
 
     /* Build header part of command packet (excluding the OPCODE). */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
 
     /* Fill-in common area */
     cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
     cmd_pkt->handle = make_handle(req->id, handle);
 
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 
     /* Set NPORT-ID and LUN number*/
     cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
     cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
     cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
 
     int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
     host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
 
     /* Total Data and protection segment(s) */
     cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
     /* Build IOCB segments and adjust for data protection segments */
     if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
         req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
         QLA_SUCCESS)
         goto queuing_error;
 
     cmd_pkt->entry_count = (uint8_t)req_cnt;
     cmd_pkt->timeout = cpu_to_le16(0);
     wmb();
 
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->qpair->cmd_cnt++;
     /* Set chip new ring index. */
     wrt_reg_dword(req->req_q_in, req->ring_index);
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla24xx_process_response_queue(vha, rsp);
 
     spin_unlock_irqrestore(&qpair->qp_lock, flags);
 
     return QLA_SUCCESS;
 
 queuing_error:
     if (status & QDSS_GOT_Q_SPACE) {
         req->outstanding_cmds[handle] = NULL;
         req->cnt += req_cnt;
     }
     /* Cleanup will be performed by the caller (queuecommand) */
 
     qla_put_iocbs(sp->qpair, &sp->iores);
     spin_unlock_irqrestore(&qpair->qp_lock, flags);
 
     return QLA_FUNCTION_FAILED;
 }
 
 /* Generic Control-SRB manipulation functions. */
 
 /* hardware_lock assumed to be held. */
 
 void *
 __qla2x00_alloc_iocbs(struct qla_qpair *qpair, srb_t *sp)
 {
     scsi_qla_host_t *vha = qpair->vha;
     struct qla_hw_data *ha = vha->hw;
     struct req_que *req = qpair->req;
     device_reg_t *reg = ISP_QUE_REG(ha, req->id);
     uint32_t handle;
     request_t *pkt;
     uint16_t cnt, req_cnt;
 
     pkt = NULL;
     req_cnt = 1;
     handle = 0;
 
     if (sp && (sp->type != SRB_SCSI_CMD)) {
         /* Adjust entry-counts as needed. */
         req_cnt = sp->iocbs;
     }
 
     /* Check for room on request queue. */
     if (req->cnt < req_cnt + 2) {
         if (qpair->use_shadow_reg)
             cnt = *req->out_ptr;
         else if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
             IS_QLA28XX(ha))
             cnt = rd_reg_dword(&reg->isp25mq.req_q_out);
         else if (IS_P3P_TYPE(ha))
             cnt = rd_reg_dword(reg->isp82.req_q_out);
         else if (IS_FWI2_CAPABLE(ha))
             cnt = rd_reg_dword(&reg->isp24.req_q_out);
         else if (IS_QLAFX00(ha))
             cnt = rd_reg_dword(&reg->ispfx00.req_q_out);
         else
             cnt = qla2x00_debounce_register(
                 ISP_REQ_Q_OUT(ha, &reg->isp));
 
         if (!qpair->use_shadow_reg && cnt == ISP_REG16_DISCONNECT) {
             qla_schedule_eeh_work(vha);
             return NULL;
         }
 
         if  (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
     }
     if (req->cnt < req_cnt + 2)
         goto queuing_error;
 
     if (sp) {
         handle = qla2xxx_get_next_handle(req);
         if (handle == 0) {
             ql_log(ql_log_warn, vha, 0x700b,
                 "No room on outstanding cmd array.\n");
             goto queuing_error;
         }
 
         /* Prep command array. */
         req->current_outstanding_cmd = handle;
         req->outstanding_cmds[handle] = sp;
         sp->handle = handle;
     }
 
     /* Prep packet */
     req->cnt -= req_cnt;
     pkt = req->ring_ptr;
     memset(pkt, 0, REQUEST_ENTRY_SIZE);
     if (IS_QLAFX00(ha)) {
         wrt_reg_byte((u8 __force __iomem *)&pkt->entry_count, req_cnt);
         wrt_reg_dword((__le32 __force __iomem *)&pkt->handle, handle);
     } else {
         pkt->entry_count = req_cnt;
         pkt->handle = handle;
     }
 
     return pkt;
 
 queuing_error:
     qpair->tgt_counters.num_alloc_iocb_failed++;
     return pkt;
 }
 
 void *
 qla2x00_alloc_iocbs_ready(struct qla_qpair *qpair, srb_t *sp)
 {
     scsi_qla_host_t *vha = qpair->vha;
 
     if (qla2x00_reset_active(vha))
         return NULL;
 
     return __qla2x00_alloc_iocbs(qpair, sp);
 }
 
 void *
 qla2x00_alloc_iocbs(struct scsi_qla_host *vha, srb_t *sp)
 {
     return __qla2x00_alloc_iocbs(vha->hw->base_qpair, sp);
 }
 
 static void
 qla24xx_prli_iocb(srb_t *sp, struct logio_entry_24xx *logio)
 {
     struct srb_iocb *lio = &sp->u.iocb_cmd;
 
     logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
     logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
     if (lio->u.logio.flags & SRB_LOGIN_NVME_PRLI) {
         logio->control_flags |= cpu_to_le16(LCF_NVME_PRLI);
         if (sp->vha->flags.nvme_first_burst)
             logio->io_parameter[0] =
                 cpu_to_le32(NVME_PRLI_SP_FIRST_BURST);
         if (sp->vha->flags.nvme2_enabled) {
             /* Set service parameter BIT_7 for NVME CONF support */
             logio->io_parameter[0] |=
                 cpu_to_le32(NVME_PRLI_SP_CONF);
             /* Set service parameter BIT_8 for SLER support */
             logio->io_parameter[0] |=
                 cpu_to_le32(NVME_PRLI_SP_SLER);
             /* Set service parameter BIT_9 for PI control support */
             logio->io_parameter[0] |=
                 cpu_to_le32(NVME_PRLI_SP_PI_CTRL);
         }
     }
 
     logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     logio->port_id[0] = sp->fcport->d_id.b.al_pa;
     logio->port_id[1] = sp->fcport->d_id.b.area;
     logio->port_id[2] = sp->fcport->d_id.b.domain;
     logio->vp_index = sp->vha->vp_idx;
 }
 
 static void
 qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
 {
     struct srb_iocb *lio = &sp->u.iocb_cmd;
 
     logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
     logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
 
     if (lio->u.logio.flags & SRB_LOGIN_PRLI_ONLY) {
         logio->control_flags = cpu_to_le16(LCF_COMMAND_PRLI);
     } else {
         logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
         if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
             logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
         if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
             logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
         if (lio->u.logio.flags & SRB_LOGIN_FCSP) {
             logio->control_flags |=
                 cpu_to_le16(LCF_COMMON_FEAT | LCF_SKIP_PRLI);
             logio->io_parameter[0] =
                 cpu_to_le32(LIO_COMM_FEAT_FCSP | LIO_COMM_FEAT_CIO);
         }
     }
     logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     logio->port_id[0] = sp->fcport->d_id.b.al_pa;
     logio->port_id[1] = sp->fcport->d_id.b.area;
     logio->port_id[2] = sp->fcport->d_id.b.domain;
     logio->vp_index = sp->vha->vp_idx;
 }
 
 static void
 qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
 {
     struct qla_hw_data *ha = sp->vha->hw;
     struct srb_iocb *lio = &sp->u.iocb_cmd;
     uint16_t opts;
 
     mbx->entry_type = MBX_IOCB_TYPE;
     SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
     mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
     opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
     opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
     if (HAS_EXTENDED_IDS(ha)) {
         mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
         mbx->mb10 = cpu_to_le16(opts);
     } else {
         mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
     }
     mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
     mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
         sp->fcport->d_id.b.al_pa);
     mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
 }
 
 static void
 qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
 {
     u16 control_flags = LCF_COMMAND_LOGO;
     logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
 
     if (sp->fcport->explicit_logout) {
         control_flags |= LCF_EXPL_LOGO|LCF_FREE_NPORT;
     } else {
         control_flags |= LCF_IMPL_LOGO;
 
         if (!sp->fcport->keep_nport_handle)
             control_flags |= LCF_FREE_NPORT;
     }
 
     logio->control_flags = cpu_to_le16(control_flags);
     logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     logio->port_id[0] = sp->fcport->d_id.b.al_pa;
     logio->port_id[1] = sp->fcport->d_id.b.area;
     logio->port_id[2] = sp->fcport->d_id.b.domain;
     logio->vp_index = sp->vha->vp_idx;
 }
 
 static void
 qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
 {
     struct qla_hw_data *ha = sp->vha->hw;
 
     mbx->entry_type = MBX_IOCB_TYPE;
     SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
     mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
     mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
         cpu_to_le16(sp->fcport->loop_id) :
         cpu_to_le16(sp->fcport->loop_id << 8);
     mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
     mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
         sp->fcport->d_id.b.al_pa);
     mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
     /* Implicit: mbx->mbx10 = 0. */
 }
 
 static void
 qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
 {
     logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
     logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
     logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     logio->vp_index = sp->vha->vp_idx;
 }
 
 static void
 qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
 {
     struct qla_hw_data *ha = sp->vha->hw;
 
     mbx->entry_type = MBX_IOCB_TYPE;
     SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
     mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
     if (HAS_EXTENDED_IDS(ha)) {
         mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
         mbx->mb10 = cpu_to_le16(BIT_0);
     } else {
         mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
     }
     mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
     mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
     mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
     mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
     mbx->mb9 = cpu_to_le16(sp->vha->vp_idx);
 }
 
 static void
 qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
 {
     uint32_t flags;
     uint64_t lun;
     struct fc_port *fcport = sp->fcport;
     scsi_qla_host_t *vha = fcport->vha;
     struct qla_hw_data *ha = vha->hw;
     struct srb_iocb *iocb = &sp->u.iocb_cmd;
     struct req_que *req = vha->req;
 
     flags = iocb->u.tmf.flags;
     lun = iocb->u.tmf.lun;
 
     tsk->entry_type = TSK_MGMT_IOCB_TYPE;
     tsk->entry_count = 1;
     tsk->handle = make_handle(req->id, tsk->handle);
     tsk->nport_handle = cpu_to_le16(fcport->loop_id);
     tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
     tsk->control_flags = cpu_to_le32(flags);
     tsk->port_id[0] = fcport->d_id.b.al_pa;
     tsk->port_id[1] = fcport->d_id.b.area;
     tsk->port_id[2] = fcport->d_id.b.domain;
     tsk->vp_index = fcport->vha->vp_idx;
 
     if (flags == TCF_LUN_RESET) {
         int_to_scsilun(lun, &tsk->lun);
         host_to_fcp_swap((uint8_t *)&tsk->lun,
             sizeof(tsk->lun));
     }
 }
 
 static void
 qla2x00_async_done(struct srb *sp, int res)
 {
     if (del_timer(&sp->u.iocb_cmd.timer)) {
         /*
          * Successfully cancelled the timeout handler
          * ref: TMR
          */
         if (kref_put(&sp->cmd_kref, qla2x00_sp_release))
             return;
     }
     sp->async_done(sp, res);
 }
 
 void
 qla2x00_sp_release(struct kref *kref)
 {
     struct srb *sp = container_of(kref, struct srb, cmd_kref);
 
     sp->free(sp);
 }
 
 void
 qla2x00_init_async_sp(srb_t *sp, unsigned long tmo,
              void (*done)(struct srb *sp, int res))
 {
     timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
     sp->done = qla2x00_async_done;
     sp->async_done = done;
     sp->free = qla2x00_sp_free;
     sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
     sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
     if (IS_QLAFX00(sp->vha->hw) && sp->type == SRB_FXIOCB_DCMD)
         init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
     sp->start_timer = 1;
 }
 
 static void qla2x00_els_dcmd_sp_free(srb_t *sp)
 {
     struct srb_iocb *elsio = &sp->u.iocb_cmd;
 
     kfree(sp->fcport);
 
     if (elsio->u.els_logo.els_logo_pyld)
         dma_free_coherent(&sp->vha->hw->pdev->dev, DMA_POOL_SIZE,
             elsio->u.els_logo.els_logo_pyld,
             elsio->u.els_logo.els_logo_pyld_dma);
 
     del_timer(&elsio->timer);
     qla2x00_rel_sp(sp);
 }
 
 static void
 qla2x00_els_dcmd_iocb_timeout(void *data)
 {
     srb_t *sp = data;
     fc_port_t *fcport = sp->fcport;
     struct scsi_qla_host *vha = sp->vha;
     struct srb_iocb *lio = &sp->u.iocb_cmd;
     unsigned long flags = 0;
     int res, h;
 
     ql_dbg(ql_dbg_io, vha, 0x3069,
         "%s Timeout, hdl=%x, portid=%02x%02x%02x\n",
         sp->name, sp->handle, fcport->d_id.b.domain, fcport->d_id.b.area,
         fcport->d_id.b.al_pa);
 
     /* Abort the exchange */
     res = qla24xx_async_abort_cmd(sp, false);
     if (res) {
         ql_dbg(ql_dbg_io, vha, 0x3070,
             "mbx abort_command failed.\n");
         spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
         for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
             if (sp->qpair->req->outstanding_cmds[h] == sp) {
                 sp->qpair->req->outstanding_cmds[h] = NULL;
                 break;
             }
         }
         spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
         complete(&lio->u.els_logo.comp);
     } else {
         ql_dbg(ql_dbg_io, vha, 0x3071,
             "mbx abort_command success.\n");
     }
 }
 
 static void qla2x00_els_dcmd_sp_done(srb_t *sp, int res)
 {
     fc_port_t *fcport = sp->fcport;
     struct srb_iocb *lio = &sp->u.iocb_cmd;
     struct scsi_qla_host *vha = sp->vha;
 
     ql_dbg(ql_dbg_io, vha, 0x3072,
         "%s hdl=%x, portid=%02x%02x%02x done\n",
         sp->name, sp->handle, fcport->d_id.b.domain,
         fcport->d_id.b.area, fcport->d_id.b.al_pa);
 
     complete(&lio->u.els_logo.comp);
 }
 
 int
 qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
     port_id_t remote_did)
 {
     srb_t *sp;
     fc_port_t *fcport = NULL;
     struct srb_iocb *elsio = NULL;
     struct qla_hw_data *ha = vha->hw;
     struct els_logo_payload logo_pyld;
     int rval = QLA_SUCCESS;
 
     fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
     if (!fcport) {
            ql_log(ql_log_info, vha, 0x70e5, "fcport allocation failed\n");
            return -ENOMEM;
     }
 
     /* Alloc SRB structure
      * ref: INIT
      */
     sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
     if (!sp) {
         kfree(fcport);
         ql_log(ql_log_info, vha, 0x70e6,
          "SRB allocation failed\n");
         return -ENOMEM;
     }
 
     elsio = &sp->u.iocb_cmd;
     fcport->loop_id = 0xFFFF;
     fcport->d_id.b.domain = remote_did.b.domain;
     fcport->d_id.b.area = remote_did.b.area;
     fcport->d_id.b.al_pa = remote_did.b.al_pa;
 
     ql_dbg(ql_dbg_io, vha, 0x3073, "portid=%02x%02x%02x done\n",
         fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa);
 
     sp->type = SRB_ELS_DCMD;
     sp->name = "ELS_DCMD";
     sp->fcport = fcport;
     qla2x00_init_async_sp(sp, ELS_DCMD_TIMEOUT,
                   qla2x00_els_dcmd_sp_done);
     sp->free = qla2x00_els_dcmd_sp_free;
     sp->u.iocb_cmd.timeout = qla2x00_els_dcmd_iocb_timeout;
     init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
 
     elsio->u.els_logo.els_logo_pyld = dma_alloc_coherent(&ha->pdev->dev,
                 DMA_POOL_SIZE, &elsio->u.els_logo.els_logo_pyld_dma,
                 GFP_KERNEL);
 
     if (!elsio->u.els_logo.els_logo_pyld) {
         /* ref: INIT */
         kref_put(&sp->cmd_kref, qla2x00_sp_release);
         return QLA_FUNCTION_FAILED;
     }
 
     memset(&logo_pyld, 0, sizeof(struct els_logo_payload));
 
     elsio->u.els_logo.els_cmd = els_opcode;
     logo_pyld.opcode = els_opcode;
     logo_pyld.s_id[0] = vha->d_id.b.al_pa;
     logo_pyld.s_id[1] = vha->d_id.b.area;
     logo_pyld.s_id[2] = vha->d_id.b.domain;
     host_to_fcp_swap(logo_pyld.s_id, sizeof(uint32_t));
     memcpy(&logo_pyld.wwpn, vha->port_name, WWN_SIZE);
 
     memcpy(elsio->u.els_logo.els_logo_pyld, &logo_pyld,
         sizeof(struct els_logo_payload));
     ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3075, "LOGO buffer:");
     ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x010a,
                elsio->u.els_logo.els_logo_pyld,
                sizeof(*elsio->u.els_logo.els_logo_pyld));
 
     rval = qla2x00_start_sp(sp);
     if (rval != QLA_SUCCESS) {
         /* ref: INIT */
         kref_put(&sp->cmd_kref, qla2x00_sp_release);
         return QLA_FUNCTION_FAILED;
     }
 
     ql_dbg(ql_dbg_io, vha, 0x3074,
         "%s LOGO sent, hdl=%x, loopid=%x, portid=%02x%02x%02x.\n",
         sp->name, sp->handle, fcport->loop_id, fcport->d_id.b.domain,
         fcport->d_id.b.area, fcport->d_id.b.al_pa);
 
     wait_for_completion(&elsio->u.els_logo.comp);
 
     /* ref: INIT */
     kref_put(&sp->cmd_kref, qla2x00_sp_release);
     return rval;
 }
 
 static void
 qla24xx_els_logo_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
 {
     scsi_qla_host_t *vha = sp->vha;
     struct srb_iocb *elsio = &sp->u.iocb_cmd;
 
     els_iocb->entry_type = ELS_IOCB_TYPE;
     els_iocb->entry_count = 1;
     els_iocb->sys_define = 0;
     els_iocb->entry_status = 0;
     els_iocb->handle = sp->handle;
     els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     els_iocb->tx_dsd_count = cpu_to_le16(1);
     els_iocb->vp_index = vha->vp_idx;
     els_iocb->sof_type = EST_SOFI3;
     els_iocb->rx_dsd_count = 0;
     els_iocb->opcode = elsio->u.els_logo.els_cmd;
 
     els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
     els_iocb->d_id[1] = sp->fcport->d_id.b.area;
     els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
     /* For SID the byte order is different than DID */
     els_iocb->s_id[1] = vha->d_id.b.al_pa;
     els_iocb->s_id[2] = vha->d_id.b.area;
     els_iocb->s_id[0] = vha->d_id.b.domain;
 
     if (elsio->u.els_logo.els_cmd == ELS_DCMD_PLOGI) {
         if (vha->hw->flags.edif_enabled)
             els_iocb->control_flags = cpu_to_le16(ECF_SEC_LOGIN);
         else
             els_iocb->control_flags = 0;
         els_iocb->tx_byte_count = els_iocb->tx_len =
             cpu_to_le32(sizeof(struct els_plogi_payload));
         put_unaligned_le64(elsio->u.els_plogi.els_plogi_pyld_dma,
                    &els_iocb->tx_address);
         els_iocb->rx_dsd_count = cpu_to_le16(1);
         els_iocb->rx_byte_count = els_iocb->rx_len =
             cpu_to_le32(sizeof(struct els_plogi_payload));
         put_unaligned_le64(elsio->u.els_plogi.els_resp_pyld_dma,
                    &els_iocb->rx_address);
 
         ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3073,
             "PLOGI ELS IOCB:\n");
         ql_dump_buffer(ql_log_info, vha, 0x0109,
             (uint8_t *)els_iocb,
             sizeof(*els_iocb));
     } else {
         els_iocb->tx_byte_count =
             cpu_to_le32(sizeof(struct els_logo_payload));
         put_unaligned_le64(elsio->u.els_logo.els_logo_pyld_dma,
                    &els_iocb->tx_address);
         els_iocb->tx_len = cpu_to_le32(sizeof(struct els_logo_payload));
 
         els_iocb->rx_byte_count = 0;
         els_iocb->rx_address = 0;
         els_iocb->rx_len = 0;
         ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x3076,
                "LOGO ELS IOCB:");
         ql_dump_buffer(ql_log_info, vha, 0x010b,
                    els_iocb,
                    sizeof(*els_iocb));
     }
 
     sp->vha->qla_stats.control_requests++;
 }
 
 void
 qla2x00_els_dcmd2_iocb_timeout(void *data)
 {
     srb_t *sp = data;
     fc_port_t *fcport = sp->fcport;
     struct scsi_qla_host *vha = sp->vha;
     unsigned long flags = 0;
     int res, h;
 
     ql_dbg(ql_dbg_io + ql_dbg_disc, vha, 0x3069,
         "%s hdl=%x ELS Timeout, %8phC portid=%06x\n",
         sp->name, sp->handle, fcport->port_name, fcport->d_id.b24);
 
     /* Abort the exchange */
     res = qla24xx_async_abort_cmd(sp, false);
     ql_dbg(ql_dbg_io, vha, 0x3070,
         "mbx abort_command %s\n",
         (res == QLA_SUCCESS) ? "successful" : "failed");
     if (res) {
         spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
         for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
             if (sp->qpair->req->outstanding_cmds[h] == sp) {
                 sp->qpair->req->outstanding_cmds[h] = NULL;
                 break;
             }
         }
         spin_unlock_irqrestore(sp->qpair->qp_lock_ptr, flags);
         sp->done(sp, QLA_FUNCTION_TIMEOUT);
     }
 }
 
 void qla2x00_els_dcmd2_free(scsi_qla_host_t *vha, struct els_plogi *els_plogi)
 {
     if (els_plogi->els_plogi_pyld)
         dma_free_coherent(&vha->hw->pdev->dev,
                   els_plogi->tx_size,
                   els_plogi->els_plogi_pyld,
                   els_plogi->els_plogi_pyld_dma);
 
     if (els_plogi->els_resp_pyld)
         dma_free_coherent(&vha->hw->pdev->dev,
                   els_plogi->rx_size,
                   els_plogi->els_resp_pyld,
                   els_plogi->els_resp_pyld_dma);
 }
 
 static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
 {
     fc_port_t *fcport = sp->fcport;
     struct srb_iocb *lio = &sp->u.iocb_cmd;
     struct scsi_qla_host *vha = sp->vha;
     struct event_arg ea;
     struct qla_work_evt *e;
     struct fc_port *conflict_fcport;
     port_id_t cid;  /* conflict Nport id */
     const __le32 *fw_status = sp->u.iocb_cmd.u.els_plogi.fw_status;
     u16 lid;
 
     ql_dbg(ql_dbg_disc, vha, 0x3072,
         "%s ELS done rc %d hdl=%x, portid=%06x %8phC\n",
         sp->name, res, sp->handle, fcport->d_id.b24, fcport->port_name);
 
     fcport->flags &= ~(FCF_ASYNC_SENT|FCF_ASYNC_ACTIVE);
     /* For edif, set logout on delete to ensure any residual key from FW is flushed.*/
     fcport->logout_on_delete = 1;
     fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 
     if (sp->flags & SRB_WAKEUP_ON_COMP)
         complete(&lio->u.els_plogi.comp);
     else {
         switch (le32_to_cpu(fw_status[0])) {
         case CS_DATA_UNDERRUN:
         case CS_COMPLETE:
             memset(&ea, 0, sizeof(ea));
             ea.fcport = fcport;
             ea.rc = res;
             qla_handle_els_plogi_done(vha, &ea);
             break;
 
         case CS_IOCB_ERROR:
             switch (le32_to_cpu(fw_status[1])) {
             case LSC_SCODE_PORTID_USED:
                 lid = le32_to_cpu(fw_status[2]) & 0xffff;
                 qlt_find_sess_invalidate_other(vha,
                     wwn_to_u64(fcport->port_name),
                     fcport->d_id, lid, &conflict_fcport);
                 if (conflict_fcport) {
                     /*
                      * Another fcport shares the same
                      * loop_id & nport id; conflict
                      * fcport needs to finish cleanup
                      * before this fcport can proceed
                      * to login.
                      */
                     conflict_fcport->conflict = fcport;
                     fcport->login_pause = 1;
                     ql_dbg(ql_dbg_disc, vha, 0x20ed,
                         "%s %d %8phC pid %06x inuse with lid %#x post gidpn\n",
                         __func__, __LINE__,
                         fcport->port_name,
                         fcport->d_id.b24, lid);
                 } else {
                     ql_dbg(ql_dbg_disc, vha, 0x20ed,
                         "%s %d %8phC pid %06x inuse with lid %#x sched del\n",
                         __func__, __LINE__,
                         fcport->port_name,
                         fcport->d_id.b24, lid);
                     qla2x00_clear_loop_id(fcport);
                     set_bit(lid, vha->hw->loop_id_map);
                     fcport->loop_id = lid;
                     fcport->keep_nport_handle = 0;
                     qlt_schedule_sess_for_deletion(fcport);
                 }
                 break;
 
             case LSC_SCODE_NPORT_USED:
                 cid.b.domain = (le32_to_cpu(fw_status[2]) >> 16)
                     & 0xff;
                 cid.b.area   = (le32_to_cpu(fw_status[2]) >>  8)
                     & 0xff;
                 cid.b.al_pa  = le32_to_cpu(fw_status[2]) & 0xff;
                 cid.b.rsvd_1 = 0;
 
                 ql_dbg(ql_dbg_disc, vha, 0x20ec,
                     "%s %d %8phC lid %#x in use with pid %06x post gnl\n",
                     __func__, __LINE__, fcport->port_name,
                     fcport->loop_id, cid.b24);
                 set_bit(fcport->loop_id,
                     vha->hw->loop_id_map);
                 fcport->loop_id = FC_NO_LOOP_ID;
                 qla24xx_post_gnl_work(vha, fcport);
                 break;
 
             case LSC_SCODE_NOXCB:
                 vha->hw->exch_starvation++;
                 if (vha->hw->exch_starvation > 5) {
                     ql_log(ql_log_warn, vha, 0xd046,
                         "Exchange starvation. Resetting RISC\n");
                     vha->hw->exch_starvation = 0;
                     set_bit(ISP_ABORT_NEEDED,
                         &vha->dpc_flags);
                     qla2xxx_wake_dpc(vha);
                     break;
                 }
                 fallthrough;
             default:
                 ql_dbg(ql_dbg_disc, vha, 0x20eb,
                     "%s %8phC cmd error fw_status 0x%x 0x%x 0x%x\n",
                     __func__, sp->fcport->port_name,
                     fw_status[0], fw_status[1], fw_status[2]);
 
                 fcport->flags &= ~FCF_ASYNC_SENT;
                 qlt_schedule_sess_for_deletion(fcport);
                 break;
             }
             break;
 
         default:
             ql_dbg(ql_dbg_disc, vha, 0x20eb,
                 "%s %8phC cmd error 2 fw_status 0x%x 0x%x 0x%x\n",
                 __func__, sp->fcport->port_name,
                 fw_status[0], fw_status[1], fw_status[2]);
 
             sp->fcport->flags &= ~FCF_ASYNC_SENT;
             qlt_schedule_sess_for_deletion(fcport);
             break;
         }
 
         e = qla2x00_alloc_work(vha, QLA_EVT_UNMAP);
         if (!e) {
             struct srb_iocb *elsio = &sp->u.iocb_cmd;
 
             qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
             /* ref: INIT */
             kref_put(&sp->cmd_kref, qla2x00_sp_release);
             return;
         }
         e->u.iosb.sp = sp;
         qla2x00_post_work(vha, e);
     }
 }
 
 int
 qla24xx_els_dcmd2_iocb(scsi_qla_host_t *vha, int els_opcode,
     fc_port_t *fcport, bool wait)
 {
     srb_t *sp;
     struct srb_iocb *elsio = NULL;
     struct qla_hw_data *ha = vha->hw;
     int rval = QLA_SUCCESS;
     void    *ptr, *resp_ptr;
 
     /* Alloc SRB structure
      * ref: INIT
      */
     sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
     if (!sp) {
         ql_log(ql_log_info, vha, 0x70e6,
          "SRB allocation failed\n");
         fcport->flags &= ~FCF_ASYNC_ACTIVE;
         return -ENOMEM;
     }
 
     fcport->flags |= FCF_ASYNC_SENT;
     qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_PEND);
     elsio = &sp->u.iocb_cmd;
     ql_dbg(ql_dbg_io, vha, 0x3073,
            "%s Enter: PLOGI portid=%06x\n", __func__, fcport->d_id.b24);
 
     if (wait)
         sp->flags = SRB_WAKEUP_ON_COMP;
 
     sp->type = SRB_ELS_DCMD;
     sp->name = "ELS_DCMD";
     sp->fcport = fcport;
     qla2x00_init_async_sp(sp, ELS_DCMD_TIMEOUT + 2,
                  qla2x00_els_dcmd2_sp_done);
     sp->u.iocb_cmd.timeout = qla2x00_els_dcmd2_iocb_timeout;
 
     elsio->u.els_plogi.tx_size = elsio->u.els_plogi.rx_size = DMA_POOL_SIZE;
 
     ptr = elsio->u.els_plogi.els_plogi_pyld =
         dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.tx_size,
         &elsio->u.els_plogi.els_plogi_pyld_dma, GFP_KERNEL);
 
     if (!elsio->u.els_plogi.els_plogi_pyld) {
         rval = QLA_FUNCTION_FAILED;
         goto out;
     }
 
     resp_ptr = elsio->u.els_plogi.els_resp_pyld =
         dma_alloc_coherent(&ha->pdev->dev, elsio->u.els_plogi.rx_size,
         &elsio->u.els_plogi.els_resp_pyld_dma, GFP_KERNEL);
 
     if (!elsio->u.els_plogi.els_resp_pyld) {
         rval = QLA_FUNCTION_FAILED;
         goto out;
     }
 
     ql_dbg(ql_dbg_io, vha, 0x3073, "PLOGI %p %p\n", ptr, resp_ptr);
 
     memset(ptr, 0, sizeof(struct els_plogi_payload));
     memset(resp_ptr, 0, sizeof(struct els_plogi_payload));
     memcpy(elsio->u.els_plogi.els_plogi_pyld->data,
         &ha->plogi_els_payld.fl_csp, LOGIN_TEMPLATE_SIZE);
 
     elsio->u.els_plogi.els_cmd = els_opcode;
     elsio->u.els_plogi.els_plogi_pyld->opcode = els_opcode;
 
     if (els_opcode == ELS_DCMD_PLOGI && DBELL_ACTIVE(vha)) {
         struct fc_els_flogi *p = ptr;
 
         p->fl_csp.sp_features |= cpu_to_be16(FC_SP_FT_SEC);
     }
 
     ql_dbg(ql_dbg_disc + ql_dbg_buffer, vha, 0x3073, "PLOGI buffer:\n");
     ql_dump_buffer(ql_dbg_disc + ql_dbg_buffer, vha, 0x0109,
         (uint8_t *)elsio->u.els_plogi.els_plogi_pyld,
         sizeof(*elsio->u.els_plogi.els_plogi_pyld));
 
     init_completion(&elsio->u.els_plogi.comp);
     rval = qla2x00_start_sp(sp);
     if (rval != QLA_SUCCESS) {
         rval = QLA_FUNCTION_FAILED;
     } else {
         ql_dbg(ql_dbg_disc, vha, 0x3074,
             "%s PLOGI sent, hdl=%x, loopid=%x, to port_id %06x from port_id %06x\n",
             sp->name, sp->handle, fcport->loop_id,
             fcport->d_id.b24, vha->d_id.b24);
     }
 
     if (wait) {
         wait_for_completion(&elsio->u.els_plogi.comp);
 
         if (elsio->u.els_plogi.comp_status != CS_COMPLETE)
             rval = QLA_FUNCTION_FAILED;
     } else {
         goto done;
     }
 
 out:
     fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
     qla2x00_els_dcmd2_free(vha, &elsio->u.els_plogi);
     /* ref: INIT */
     kref_put(&sp->cmd_kref, qla2x00_sp_release);
 done:
     return rval;
 }
 
 /* it is assume qpair lock is held */
 void qla_els_pt_iocb(struct scsi_qla_host *vha,
     struct els_entry_24xx *els_iocb,
     struct qla_els_pt_arg *a)
 {
     els_iocb->entry_type = ELS_IOCB_TYPE;
     els_iocb->entry_count = 1;
     els_iocb->sys_define = 0;
     els_iocb->entry_status = 0;
     els_iocb->handle = QLA_SKIP_HANDLE;
     els_iocb->nport_handle = a->nport_handle;
     els_iocb->rx_xchg_address = a->rx_xchg_address;
     els_iocb->tx_dsd_count = cpu_to_le16(1);
     els_iocb->vp_index = a->vp_idx;
     els_iocb->sof_type = EST_SOFI3;
     els_iocb->rx_dsd_count = cpu_to_le16(0);
     els_iocb->opcode = a->els_opcode;
 
     els_iocb->d_id[0] = a->did.b.al_pa;
     els_iocb->d_id[1] = a->did.b.area;
     els_iocb->d_id[2] = a->did.b.domain;
     /* For SID the byte order is different than DID */
     els_iocb->s_id[1] = vha->d_id.b.al_pa;
     els_iocb->s_id[2] = vha->d_id.b.area;
     els_iocb->s_id[0] = vha->d_id.b.domain;
 
     els_iocb->control_flags = cpu_to_le16(a->control_flags);
 
     els_iocb->tx_byte_count = cpu_to_le32(a->tx_byte_count);
     els_iocb->tx_len = cpu_to_le32(a->tx_len);
     put_unaligned_le64(a->tx_addr, &els_iocb->tx_address);
 
     els_iocb->rx_byte_count = cpu_to_le32(a->rx_byte_count);
     els_iocb->rx_len = cpu_to_le32(a->rx_len);
     put_unaligned_le64(a->rx_addr, &els_iocb->rx_address);
 }
 
 static void
 qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
 {
     struct bsg_job *bsg_job = sp->u.bsg_job;
     struct fc_bsg_request *bsg_request = bsg_job->request;
 
         els_iocb->entry_type = ELS_IOCB_TYPE;
         els_iocb->entry_count = 1;
         els_iocb->sys_define = 0;
         els_iocb->entry_status = 0;
         els_iocb->handle = sp->handle;
     els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     els_iocb->tx_dsd_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
     els_iocb->vp_index = sp->vha->vp_idx;
         els_iocb->sof_type = EST_SOFI3;
     els_iocb->rx_dsd_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
 
     els_iocb->opcode =
         sp->type == SRB_ELS_CMD_RPT ?
         bsg_request->rqst_data.r_els.els_code :
         bsg_request->rqst_data.h_els.command_code;
     els_iocb->d_id[0] = sp->fcport->d_id.b.al_pa;
     els_iocb->d_id[1] = sp->fcport->d_id.b.area;
     els_iocb->d_id[2] = sp->fcport->d_id.b.domain;
         els_iocb->control_flags = 0;
         els_iocb->rx_byte_count =
             cpu_to_le32(bsg_job->reply_payload.payload_len);
         els_iocb->tx_byte_count =
             cpu_to_le32(bsg_job->request_payload.payload_len);
 
     put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
                &els_iocb->tx_address);
         els_iocb->tx_len = cpu_to_le32(sg_dma_len
             (bsg_job->request_payload.sg_list));
 
     put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
                &els_iocb->rx_address);
         els_iocb->rx_len = cpu_to_le32(sg_dma_len
             (bsg_job->reply_payload.sg_list));
 
     sp->vha->qla_stats.control_requests++;
 }
 
 static void
 qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
 {
     uint16_t        avail_dsds;
     struct dsd64    *cur_dsd;
     struct scatterlist *sg;
     int index;
     uint16_t tot_dsds;
     scsi_qla_host_t *vha = sp->vha;
     struct qla_hw_data *ha = vha->hw;
     struct bsg_job *bsg_job = sp->u.bsg_job;
     int entry_count = 1;
 
     memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
     ct_iocb->entry_type = CT_IOCB_TYPE;
     ct_iocb->entry_status = 0;
     ct_iocb->handle1 = sp->handle;
     SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
     ct_iocb->status = cpu_to_le16(0);
     ct_iocb->control_flags = cpu_to_le16(0);
     ct_iocb->timeout = 0;
     ct_iocb->cmd_dsd_count =
         cpu_to_le16(bsg_job->request_payload.sg_cnt);
     ct_iocb->total_dsd_count =
         cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
     ct_iocb->req_bytecount =
         cpu_to_le32(bsg_job->request_payload.payload_len);
     ct_iocb->rsp_bytecount =
         cpu_to_le32(bsg_job->reply_payload.payload_len);
 
     put_unaligned_le64(sg_dma_address(bsg_job->request_payload.sg_list),
                &ct_iocb->req_dsd.address);
     ct_iocb->req_dsd.length = ct_iocb->req_bytecount;
 
     put_unaligned_le64(sg_dma_address(bsg_job->reply_payload.sg_list),
                &ct_iocb->rsp_dsd.address);
     ct_iocb->rsp_dsd.length = ct_iocb->rsp_bytecount;
 
     avail_dsds = 1;
     cur_dsd = &ct_iocb->rsp_dsd;
     index = 0;
     tot_dsds = bsg_job->reply_payload.sg_cnt;
 
     for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
         cont_a64_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
             * Five DSDs are available in the Cont.
             * Type 1 IOCB.
                    */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
                 vha->hw->req_q_map[0]);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = 5;
             entry_count++;
         }
 
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
     ct_iocb->entry_count = entry_count;
 
     sp->vha->qla_stats.control_requests++;
 }
 
 static void
 qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
 {
     uint16_t        avail_dsds;
     struct dsd64    *cur_dsd;
     struct scatterlist *sg;
     int index;
     uint16_t cmd_dsds, rsp_dsds;
     scsi_qla_host_t *vha = sp->vha;
     struct qla_hw_data *ha = vha->hw;
     struct bsg_job *bsg_job = sp->u.bsg_job;
     int entry_count = 1;
     cont_a64_entry_t *cont_pkt = NULL;
 
     ct_iocb->entry_type = CT_IOCB_TYPE;
         ct_iocb->entry_status = 0;
         ct_iocb->sys_define = 0;
         ct_iocb->handle = sp->handle;
 
     ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     ct_iocb->vp_index = sp->vha->vp_idx;
     ct_iocb->comp_status = cpu_to_le16(0);
 
     cmd_dsds = bsg_job->request_payload.sg_cnt;
     rsp_dsds = bsg_job->reply_payload.sg_cnt;
 
     ct_iocb->cmd_dsd_count = cpu_to_le16(cmd_dsds);
         ct_iocb->timeout = 0;
     ct_iocb->rsp_dsd_count = cpu_to_le16(rsp_dsds);
         ct_iocb->cmd_byte_count =
             cpu_to_le32(bsg_job->request_payload.payload_len);
 
     avail_dsds = 2;
     cur_dsd = ct_iocb->dsd;
     index = 0;
 
     for_each_sg(bsg_job->request_payload.sg_list, sg, cmd_dsds, index) {
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
              * Five DSDs are available in the Cont.
              * Type 1 IOCB.
              */
             cont_pkt = qla2x00_prep_cont_type1_iocb(
                 vha, ha->req_q_map[0]);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = 5;
             entry_count++;
         }
 
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
 
     index = 0;
 
     for_each_sg(bsg_job->reply_payload.sg_list, sg, rsp_dsds, index) {
         /* Allocate additional continuation packets? */
         if (avail_dsds == 0) {
             /*
             * Five DSDs are available in the Cont.
             * Type 1 IOCB.
                    */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
                 ha->req_q_map[0]);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = 5;
             entry_count++;
         }
 
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
         ct_iocb->entry_count = entry_count;
 }
 
 /*
  * qla82xx_start_scsi() - Send a SCSI command to the ISP
  * @sp: command to send to the ISP
  *
  * Returns non-zero if a failure occurred, else zero.
  */
 int
 qla82xx_start_scsi(srb_t *sp)
 {
     int     nseg;
     unsigned long   flags;
     struct scsi_cmnd *cmd;
     uint32_t    *clr_ptr;
     uint32_t    handle;
     uint16_t    cnt;
     uint16_t    req_cnt;
     uint16_t    tot_dsds;
     struct device_reg_82xx __iomem *reg;
     uint32_t dbval;
     __be32 *fcp_dl;
     uint8_t additional_cdb_len;
     struct ct6_dsd *ctx;
     struct scsi_qla_host *vha = sp->vha;
     struct qla_hw_data *ha = vha->hw;
     struct req_que *req = NULL;
     struct rsp_que *rsp = NULL;
 
     /* Setup device pointers. */
     reg = &ha->iobase->isp82;
     cmd = GET_CMD_SP(sp);
     req = vha->req;
     rsp = ha->rsp_q_map[0];
 
     /* So we know we haven't pci_map'ed anything yet */
     tot_dsds = 0;
 
     dbval = 0x04 | (ha->portnum << 5);
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (qla2x00_marker(vha, ha->base_qpair,
             0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
             ql_log(ql_log_warn, vha, 0x300c,
                 "qla2x00_marker failed for cmd=%p.\n", cmd);
             return QLA_FUNCTION_FAILED;
         }
         vha->marker_needed = 0;
     }
 
     /* Acquire ring specific lock */
     spin_lock_irqsave(&ha->hardware_lock, flags);
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0)
         goto queuing_error;
 
     /* Map the sg table so we have an accurate count of sg entries needed */
     if (scsi_sg_count(cmd)) {
         nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
             scsi_sg_count(cmd), cmd->sc_data_direction);
         if (unlikely(!nseg))
             goto queuing_error;
     } else
         nseg = 0;
 
     tot_dsds = nseg;
 
     if (tot_dsds > ql2xshiftctondsd) {
         struct cmd_type_6 *cmd_pkt;
         uint16_t more_dsd_lists = 0;
         struct dsd_dma *dsd_ptr;
         uint16_t i;
 
         more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
         if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
             ql_dbg(ql_dbg_io, vha, 0x300d,
                 "Num of DSD list %d is than %d for cmd=%p.\n",
                 more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
                 cmd);
             goto queuing_error;
         }
 
         if (more_dsd_lists <= ha->gbl_dsd_avail)
             goto sufficient_dsds;
         else
             more_dsd_lists -= ha->gbl_dsd_avail;
 
         for (i = 0; i < more_dsd_lists; i++) {
             dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
             if (!dsd_ptr) {
                 ql_log(ql_log_fatal, vha, 0x300e,
                     "Failed to allocate memory for dsd_dma "
                     "for cmd=%p.\n", cmd);
                 goto queuing_error;
             }
 
             dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
                 GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
             if (!dsd_ptr->dsd_addr) {
                 kfree(dsd_ptr);
                 ql_log(ql_log_fatal, vha, 0x300f,
                     "Failed to allocate memory for dsd_addr "
                     "for cmd=%p.\n", cmd);
                 goto queuing_error;
             }
             list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
             ha->gbl_dsd_avail++;
         }
 
 sufficient_dsds:
         req_cnt = 1;
 
         if (req->cnt < (req_cnt + 2)) {
             cnt = (uint16_t)rd_reg_dword_relaxed(
                 &reg->req_q_out[0]);
             if (req->ring_index < cnt)
                 req->cnt = cnt - req->ring_index;
             else
                 req->cnt = req->length -
                     (req->ring_index - cnt);
             if (req->cnt < (req_cnt + 2))
                 goto queuing_error;
         }
 
         ctx = sp->u.scmd.ct6_ctx =
             mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
         if (!ctx) {
             ql_log(ql_log_fatal, vha, 0x3010,
                 "Failed to allocate ctx for cmd=%p.\n", cmd);
             goto queuing_error;
         }
 
         memset(ctx, 0, sizeof(struct ct6_dsd));
         ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
             GFP_ATOMIC, &ctx->fcp_cmnd_dma);
         if (!ctx->fcp_cmnd) {
             ql_log(ql_log_fatal, vha, 0x3011,
                 "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
             goto queuing_error;
         }
 
         /* Initialize the DSD list and dma handle */
         INIT_LIST_HEAD(&ctx->dsd_list);
         ctx->dsd_use_cnt = 0;
 
         if (cmd->cmd_len > 16) {
             additional_cdb_len = cmd->cmd_len - 16;
             if ((cmd->cmd_len % 4) != 0) {
                 /* SCSI command bigger than 16 bytes must be
                  * multiple of 4
                  */
                 ql_log(ql_log_warn, vha, 0x3012,
                     "scsi cmd len %d not multiple of 4 "
                     "for cmd=%p.\n", cmd->cmd_len, cmd);
                 goto queuing_error_fcp_cmnd;
             }
             ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
         } else {
             additional_cdb_len = 0;
             ctx->fcp_cmnd_len = 12 + 16 + 4;
         }
 
         cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
         cmd_pkt->handle = make_handle(req->id, handle);
 
         /* Zero out remaining portion of packet. */
         /*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
         clr_ptr = (uint32_t *)cmd_pkt + 2;
         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
         /* Set NPORT-ID and LUN number*/
         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
         cmd_pkt->vp_index = sp->vha->vp_idx;
 
         /* Build IOCB segments */
         if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
             goto queuing_error_fcp_cmnd;
 
         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
 
         /* build FCP_CMND IU */
         int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
         ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
 
         if (cmd->sc_data_direction == DMA_TO_DEVICE)
             ctx->fcp_cmnd->additional_cdb_len |= 1;
         else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
             ctx->fcp_cmnd->additional_cdb_len |= 2;
 
         /* Populate the FCP_PRIO. */
         if (ha->flags.fcp_prio_enabled)
             ctx->fcp_cmnd->task_attribute |=
                 sp->fcport->fcp_prio << 3;
 
         memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
 
         fcp_dl = (__be32 *)(ctx->fcp_cmnd->cdb + 16 +
             additional_cdb_len);
         *fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
 
         cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
         put_unaligned_le64(ctx->fcp_cmnd_dma,
                    &cmd_pkt->fcp_cmnd_dseg_address);
 
         sp->flags |= SRB_FCP_CMND_DMA_VALID;
         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
         /* Set total data segment count. */
         cmd_pkt->entry_count = (uint8_t)req_cnt;
         /* Specify response queue number where
          * completion should happen
          */
         cmd_pkt->entry_status = (uint8_t) rsp->id;
     } else {
         struct cmd_type_7 *cmd_pkt;
 
         req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
         if (req->cnt < (req_cnt + 2)) {
             cnt = (uint16_t)rd_reg_dword_relaxed(
                 &reg->req_q_out[0]);
             if (req->ring_index < cnt)
                 req->cnt = cnt - req->ring_index;
             else
                 req->cnt = req->length -
                     (req->ring_index - cnt);
         }
         if (req->cnt < (req_cnt + 2))
             goto queuing_error;
 
         cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
         cmd_pkt->handle = make_handle(req->id, handle);
 
         /* Zero out remaining portion of packet. */
         /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
         clr_ptr = (uint32_t *)cmd_pkt + 2;
         memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
         cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
 
         /* Set NPORT-ID and LUN number*/
         cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
         cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
         cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
         cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
         cmd_pkt->vp_index = sp->vha->vp_idx;
 
         int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
         host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
             sizeof(cmd_pkt->lun));
 
         /* Populate the FCP_PRIO. */
         if (ha->flags.fcp_prio_enabled)
             cmd_pkt->task |= sp->fcport->fcp_prio << 3;
 
         /* Load SCSI command packet. */
         memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
         host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
 
         cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
         /* Build IOCB segments */
         qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
 
         /* Set total data segment count. */
         cmd_pkt->entry_count = (uint8_t)req_cnt;
         /* Specify response queue number where
          * completion should happen.
          */
         cmd_pkt->entry_status = (uint8_t) rsp->id;
 
     }
     /* Build command packet. */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     cmd->host_scribble = (unsigned char *)(unsigned long)handle;
     req->cnt -= req_cnt;
     wmb();
 
     /* Adjust ring index. */
     req->ring_index++;
     if (req->ring_index == req->length) {
         req->ring_index = 0;
         req->ring_ptr = req->ring;
     } else
         req->ring_ptr++;
 
     sp->flags |= SRB_DMA_VALID;
 
     /* Set chip new ring index. */
     /* write, read and verify logic */
     dbval = dbval | (req->id << 8) | (req->ring_index << 16);
     if (ql2xdbwr)
         qla82xx_wr_32(ha, (uintptr_t __force)ha->nxdb_wr_ptr, dbval);
     else {
         wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
         wmb();
         while (rd_reg_dword(ha->nxdb_rd_ptr) != dbval) {
             wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
             wmb();
         }
     }
 
     /* Manage unprocessed RIO/ZIO commands in response queue. */
     if (vha->flags.process_response_queue &&
         rsp->ring_ptr->signature != RESPONSE_PROCESSED)
         qla24xx_process_response_queue(vha, rsp);
 
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
     return QLA_SUCCESS;
 
 queuing_error_fcp_cmnd:
     dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
 queuing_error:
     if (tot_dsds)
         scsi_dma_unmap(cmd);
 
     if (sp->u.scmd.crc_ctx) {
         mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
         sp->u.scmd.crc_ctx = NULL;
     }
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return QLA_FUNCTION_FAILED;
 }
 
 static void
 qla24xx_abort_iocb(srb_t *sp, struct abort_entry_24xx *abt_iocb)
 {
     struct srb_iocb *aio = &sp->u.iocb_cmd;
     scsi_qla_host_t *vha = sp->vha;
     struct req_que *req = sp->qpair->req;
     srb_t *orig_sp = sp->cmd_sp;
 
     memset(abt_iocb, 0, sizeof(struct abort_entry_24xx));
     abt_iocb->entry_type = ABORT_IOCB_TYPE;
     abt_iocb->entry_count = 1;
     abt_iocb->handle = make_handle(req->id, sp->handle);
     if (sp->fcport) {
         abt_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
         abt_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
         abt_iocb->port_id[1] = sp->fcport->d_id.b.area;
         abt_iocb->port_id[2] = sp->fcport->d_id.b.domain;
     }
     abt_iocb->handle_to_abort =
         make_handle(le16_to_cpu(aio->u.abt.req_que_no),
                 aio->u.abt.cmd_hndl);
     abt_iocb->vp_index = vha->vp_idx;
     abt_iocb->req_que_no = aio->u.abt.req_que_no;
 
     /* need to pass original sp */
     if (orig_sp)
         qla_nvme_abort_set_option(abt_iocb, orig_sp);
 
     /* Send the command to the firmware */
     wmb();
 }
 
 static void
 qla2x00_mb_iocb(srb_t *sp, struct mbx_24xx_entry *mbx)
 {
     int i, sz;
 
     mbx->entry_type = MBX_IOCB_TYPE;
     mbx->handle = sp->handle;
     sz = min(ARRAY_SIZE(mbx->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.out_mb));
 
     for (i = 0; i < sz; i++)
         mbx->mb[i] = sp->u.iocb_cmd.u.mbx.out_mb[i];
 }
 
 static void
 qla2x00_ctpthru_cmd_iocb(srb_t *sp, struct ct_entry_24xx *ct_pkt)
 {
     sp->u.iocb_cmd.u.ctarg.iocb = ct_pkt;
     qla24xx_prep_ms_iocb(sp->vha, &sp->u.iocb_cmd.u.ctarg);
     ct_pkt->handle = sp->handle;
 }
 
 static void qla2x00_send_notify_ack_iocb(srb_t *sp,
     struct nack_to_isp *nack)
 {
     struct imm_ntfy_from_isp *ntfy = sp->u.iocb_cmd.u.nack.ntfy;
 
     nack->entry_type = NOTIFY_ACK_TYPE;
     nack->entry_count = 1;
     nack->ox_id = ntfy->ox_id;
 
     nack->u.isp24.handle = sp->handle;
     nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
     if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
         nack->u.isp24.flags = ntfy->u.isp24.flags &
             cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
     }
     nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
     nack->u.isp24.status = ntfy->u.isp24.status;
     nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
     nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
     nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
     nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
     nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
     nack->u.isp24.srr_flags = 0;
     nack->u.isp24.srr_reject_code = 0;
     nack->u.isp24.srr_reject_code_expl = 0;
     nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 
     if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
         (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP) &&
         sp->vha->hw->flags.edif_enabled) {
         ql_dbg(ql_dbg_disc, sp->vha, 0x3074,
             "%s PLOGI NACK sent with FC SECURITY bit, hdl=%x, loopid=%x, to pid %06x\n",
             sp->name, sp->handle, sp->fcport->loop_id,
             sp->fcport->d_id.b24);
         nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
     }
 }
 
 /*
  * Build NVME LS request
  */
 static void
 qla_nvme_ls(srb_t *sp, struct pt_ls4_request *cmd_pkt)
 {
     struct srb_iocb *nvme;
 
     nvme = &sp->u.iocb_cmd;
     cmd_pkt->entry_type = PT_LS4_REQUEST;
     cmd_pkt->entry_count = 1;
     cmd_pkt->control_flags = cpu_to_le16(CF_LS4_ORIGINATOR << CF_LS4_SHIFT);
 
     cmd_pkt->timeout = cpu_to_le16(nvme->u.nvme.timeout_sec);
     cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
 
     cmd_pkt->tx_dseg_count = cpu_to_le16(1);
     cmd_pkt->tx_byte_count = cpu_to_le32(nvme->u.nvme.cmd_len);
     cmd_pkt->dsd[0].length = cpu_to_le32(nvme->u.nvme.cmd_len);
     put_unaligned_le64(nvme->u.nvme.cmd_dma, &cmd_pkt->dsd[0].address);
 
     cmd_pkt->rx_dseg_count = cpu_to_le16(1);
     cmd_pkt->rx_byte_count = cpu_to_le32(nvme->u.nvme.rsp_len);
     cmd_pkt->dsd[1].length = cpu_to_le32(nvme->u.nvme.rsp_len);
     put_unaligned_le64(nvme->u.nvme.rsp_dma, &cmd_pkt->dsd[1].address);
 }
 
 static void
 qla25xx_ctrlvp_iocb(srb_t *sp, struct vp_ctrl_entry_24xx *vce)
 {
     int map, pos;
 
     vce->entry_type = VP_CTRL_IOCB_TYPE;
     vce->handle = sp->handle;
     vce->entry_count = 1;
     vce->command = cpu_to_le16(sp->u.iocb_cmd.u.ctrlvp.cmd);
     vce->vp_count = cpu_to_le16(1);
 
     /*
      * index map in firmware starts with 1; decrement index
      * this is ok as we never use index 0
      */
     map = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) / 8;
     pos = (sp->u.iocb_cmd.u.ctrlvp.vp_index - 1) & 7;
     vce->vp_idx_map[map] |= 1 << pos;
 }
 
 static void
 qla24xx_prlo_iocb(srb_t *sp, struct logio_entry_24xx *logio)
 {
     logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
     logio->control_flags =
         cpu_to_le16(LCF_COMMAND_PRLO|LCF_IMPL_PRLO);
 
     logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
     logio->port_id[0] = sp->fcport->d_id.b.al_pa;
     logio->port_id[1] = sp->fcport->d_id.b.area;
     logio->port_id[2] = sp->fcport->d_id.b.domain;
     logio->vp_index = sp->fcport->vha->vp_idx;
 }
 
 int
 qla2x00_start_sp(srb_t *sp)
 {
     int rval = QLA_SUCCESS;
     scsi_qla_host_t *vha = sp->vha;
     struct qla_hw_data *ha = vha->hw;
     struct qla_qpair *qp = sp->qpair;
     void *pkt;
     unsigned long flags;
 
     if (vha->hw->flags.eeh_busy)
         return -EIO;
 
     spin_lock_irqsave(qp->qp_lock_ptr, flags);
     pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
     if (!pkt) {
         rval = EAGAIN;
         ql_log(ql_log_warn, vha, 0x700c,
             "qla2x00_alloc_iocbs failed.\n");
         goto done;
     }
 
     switch (sp->type) {
     case SRB_LOGIN_CMD:
         IS_FWI2_CAPABLE(ha) ?
             qla24xx_login_iocb(sp, pkt) :
             qla2x00_login_iocb(sp, pkt);
         break;
     case SRB_PRLI_CMD:
         qla24xx_prli_iocb(sp, pkt);
         break;
     case SRB_LOGOUT_CMD:
         IS_FWI2_CAPABLE(ha) ?
             qla24xx_logout_iocb(sp, pkt) :
             qla2x00_logout_iocb(sp, pkt);
         break;
     case SRB_ELS_CMD_RPT:
     case SRB_ELS_CMD_HST:
         qla24xx_els_iocb(sp, pkt);
         break;
     case SRB_ELS_CMD_HST_NOLOGIN:
         qla_els_pt_iocb(sp->vha, pkt,  &sp->u.bsg_cmd.u.els_arg);
         ((struct els_entry_24xx *)pkt)->handle = sp->handle;
         break;
     case SRB_CT_CMD:
         IS_FWI2_CAPABLE(ha) ?
             qla24xx_ct_iocb(sp, pkt) :
             qla2x00_ct_iocb(sp, pkt);
         break;
     case SRB_ADISC_CMD:
         IS_FWI2_CAPABLE(ha) ?
             qla24xx_adisc_iocb(sp, pkt) :
             qla2x00_adisc_iocb(sp, pkt);
         break;
     case SRB_TM_CMD:
         IS_QLAFX00(ha) ?
             qlafx00_tm_iocb(sp, pkt) :
             qla24xx_tm_iocb(sp, pkt);
         break;
     case SRB_FXIOCB_DCMD:
     case SRB_FXIOCB_BCMD:
         qlafx00_fxdisc_iocb(sp, pkt);
         break;
     case SRB_NVME_LS:
         qla_nvme_ls(sp, pkt);
         break;
     case SRB_ABT_CMD:
         IS_QLAFX00(ha) ?
             qlafx00_abort_iocb(sp, pkt) :
             qla24xx_abort_iocb(sp, pkt);
         break;
     case SRB_ELS_DCMD:
         qla24xx_els_logo_iocb(sp, pkt);
         break;
     case SRB_CT_PTHRU_CMD:
         qla2x00_ctpthru_cmd_iocb(sp, pkt);
         break;
     case SRB_MB_IOCB:
         qla2x00_mb_iocb(sp, pkt);
         break;
     case SRB_NACK_PLOGI:
     case SRB_NACK_PRLI:
     case SRB_NACK_LOGO:
         qla2x00_send_notify_ack_iocb(sp, pkt);
         break;
     case SRB_CTRL_VP:
         qla25xx_ctrlvp_iocb(sp, pkt);
         break;
     case SRB_PRLO_CMD:
         qla24xx_prlo_iocb(sp, pkt);
         break;
     case SRB_SA_UPDATE:
         qla24xx_sa_update_iocb(sp, pkt);
         break;
     case SRB_SA_REPLACE:
         qla24xx_sa_replace_iocb(sp, pkt);
         break;
     default:
         break;
     }
 
     if (sp->start_timer) {
         /* ref: TMR timer ref
          * this code should be just before start_iocbs function
          * This will make sure that caller function don't to do
          * kref_put even on failure
          */
         kref_get(&sp->cmd_kref);
         add_timer(&sp->u.iocb_cmd.timer);
     }
 
     wmb();
     qla2x00_start_iocbs(vha, qp->req);
 done:
     spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
     return rval;
 }
 
 static void
 qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
                 struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
 {
     uint16_t avail_dsds;
     struct dsd64 *cur_dsd;
     uint32_t req_data_len = 0;
     uint32_t rsp_data_len = 0;
     struct scatterlist *sg;
     int index;
     int entry_count = 1;
     struct bsg_job *bsg_job = sp->u.bsg_job;
 
     /*Update entry type to indicate bidir command */
     put_unaligned_le32(COMMAND_BIDIRECTIONAL, &cmd_pkt->entry_type);
 
     /* Set the transfer direction, in this set both flags
      * Also set the BD_WRAP_BACK flag, firmware will take care
      * assigning DID=SID for outgoing pkts.
      */
     cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
     cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
     cmd_pkt->control_flags = cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
                             BD_WRAP_BACK);
 
     req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
     cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
     cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
     cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
 
     vha->bidi_stats.transfer_bytes += req_data_len;
     vha->bidi_stats.io_count++;
 
     vha->qla_stats.output_bytes += req_data_len;
     vha->qla_stats.output_requests++;
 
     /* Only one dsd is available for bidirectional IOCB, remaining dsds
      * are bundled in continuation iocb
      */
     avail_dsds = 1;
     cur_dsd = &cmd_pkt->fcp_dsd;
 
     index = 0;
 
     for_each_sg(bsg_job->request_payload.sg_list, sg,
                 bsg_job->request_payload.sg_cnt, index) {
         cont_a64_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets */
         if (avail_dsds == 0) {
             /* Continuation type 1 IOCB can accomodate
              * 5 DSDS
              */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = 5;
             entry_count++;
         }
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
     /* For read request DSD will always goes to continuation IOCB
      * and follow the write DSD. If there is room on the current IOCB
      * then it is added to that IOCB else new continuation IOCB is
      * allocated.
      */
     for_each_sg(bsg_job->reply_payload.sg_list, sg,
                 bsg_job->reply_payload.sg_cnt, index) {
         cont_a64_entry_t *cont_pkt;
 
         /* Allocate additional continuation packets */
         if (avail_dsds == 0) {
             /* Continuation type 1 IOCB can accomodate
              * 5 DSDS
              */
             cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
             cur_dsd = cont_pkt->dsd;
             avail_dsds = 5;
             entry_count++;
         }
         append_dsd64(&cur_dsd, sg);
         avail_dsds--;
     }
     /* This value should be same as number of IOCB required for this cmd */
     cmd_pkt->entry_count = entry_count;
 }
 
 int
 qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
 {
 
     struct qla_hw_data *ha = vha->hw;
     unsigned long flags;
     uint32_t handle;
     uint16_t req_cnt;
     uint16_t cnt;
     uint32_t *clr_ptr;
     struct cmd_bidir *cmd_pkt = NULL;
     struct rsp_que *rsp;
     struct req_que *req;
     int rval = EXT_STATUS_OK;
 
     rval = QLA_SUCCESS;
 
     rsp = ha->rsp_q_map[0];
     req = vha->req;
 
     /* Send marker if required */
     if (vha->marker_needed != 0) {
         if (qla2x00_marker(vha, ha->base_qpair,
             0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
             return EXT_STATUS_MAILBOX;
         vha->marker_needed = 0;
     }
 
     /* Acquire ring specific lock */
     spin_lock_irqsave(&ha->hardware_lock, flags);
 
     handle = qla2xxx_get_next_handle(req);
     if (handle == 0) {
         rval = EXT_STATUS_BUSY;
         goto queuing_error;
     }
 
     /* Calculate number of IOCB required */
     req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
 
     /* Check for room on request queue. */
     if (req->cnt < req_cnt + 2) {
         if (IS_SHADOW_REG_CAPABLE(ha)) {
             cnt = *req->out_ptr;
         } else {
             cnt = rd_reg_dword_relaxed(req->req_q_out);
             if (qla2x00_check_reg16_for_disconnect(vha, cnt))
                 goto queuing_error;
         }
 
         if  (req->ring_index < cnt)
             req->cnt = cnt - req->ring_index;
         else
             req->cnt = req->length -
                 (req->ring_index - cnt);
     }
     if (req->cnt < req_cnt + 2) {
         rval = EXT_STATUS_BUSY;
         goto queuing_error;
     }
 
     cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
     cmd_pkt->handle = make_handle(req->id, handle);
 
     /* Zero out remaining portion of packet. */
     /* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
     clr_ptr = (uint32_t *)cmd_pkt + 2;
     memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
 
     /* Set NPORT-ID  (of vha)*/
     cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
     cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
     cmd_pkt->port_id[1] = vha->d_id.b.area;
     cmd_pkt->port_id[2] = vha->d_id.b.domain;
 
     qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
     cmd_pkt->entry_status = (uint8_t) rsp->id;
     /* Build command packet. */
     req->current_outstanding_cmd = handle;
     req->outstanding_cmds[handle] = sp;
     sp->handle = handle;
     req->cnt -= req_cnt;
 
     /* Send the command to the firmware */
     wmb();
     qla2x00_start_iocbs(vha, req);
 queuing_error:
     spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
     return rval;
 }