// SPDX-License-Identifier: GPL-2.0-only
/*
 * Linux network driver for QLogic BR-series Converged Network Adapter.
 */
/*
 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
 * Copyright (c) 2014-2015 QLogic Corporation
 * All rights reserved
 * www.qlogic.com
 */

/* MSGQ module source file. */

#include "bfi.h"
#include "bfa_msgq.h"
#include "bfa_ioc.h"

#define call_cmdq_ent_cbfn(_cmdq_ent, _status)                          \
{                                                                       \
        bfa_msgq_cmdcbfn_t cbfn;                                        \
        void *cbarg;                                                    \
        cbfn = (_cmdq_ent)->cbfn;                                       \
        cbarg = (_cmdq_ent)->cbarg;                                     \
        (_cmdq_ent)->cbfn = NULL;                                       \
        (_cmdq_ent)->cbarg = NULL;                                      \
        if (cbfn) {                                                     \
                cbfn(cbarg, (_status));                                 \
        }                                                               \
}

static void bfa_msgq_cmdq_dbell(struct bfa_msgq_cmdq *cmdq);
static void bfa_msgq_cmdq_copy_rsp(struct bfa_msgq_cmdq *cmdq);

enum cmdq_event {
        CMDQ_E_START                    = 1,
        CMDQ_E_STOP                     = 2,
        CMDQ_E_FAIL                     = 3,
        CMDQ_E_POST                     = 4,
        CMDQ_E_INIT_RESP                = 5,
        CMDQ_E_DB_READY                 = 6,
};

bfa_fsm_state_decl(cmdq, stopped, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, init_wait, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, ready, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, dbell_wait, struct bfa_msgq_cmdq,
                        enum cmdq_event);

static void
cmdq_sm_stopped_entry(struct bfa_msgq_cmdq *cmdq)
{
        struct bfa_msgq_cmd_entry *cmdq_ent;

        cmdq->producer_index = 0;
        cmdq->consumer_index = 0;
        cmdq->flags = 0;
        cmdq->token = 0;
        cmdq->offset = 0;
        cmdq->bytes_to_copy = 0;
        while (!list_empty(&cmdq->pending_q)) {
                cmdq_ent = list_first_entry(&cmdq->pending_q,
                                            struct bfa_msgq_cmd_entry, qe);
                list_del(&cmdq_ent->qe);
                call_cmdq_ent_cbfn(cmdq_ent, BFA_STATUS_FAILED);
        }
}

static void
cmdq_sm_stopped(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
        switch (event) {
        case CMDQ_E_START:
                bfa_fsm_set_state(cmdq, cmdq_sm_init_wait);
                break;

        case CMDQ_E_STOP:
        case CMDQ_E_FAIL:
                /* No-op */
                break;

        case CMDQ_E_POST:
                cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
cmdq_sm_init_wait_entry(struct bfa_msgq_cmdq *cmdq)
{
        bfa_wc_down(&cmdq->msgq->init_wc);
}

static void
cmdq_sm_init_wait(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
        switch (event) {
        case CMDQ_E_STOP:
        case CMDQ_E_FAIL:
                bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
                break;

        case CMDQ_E_POST:
                cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
                break;

        case CMDQ_E_INIT_RESP:
                if (cmdq->flags & BFA_MSGQ_CMDQ_F_DB_UPDATE) {
                        cmdq->flags &= ~BFA_MSGQ_CMDQ_F_DB_UPDATE;
                        bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
                } else
                        bfa_fsm_set_state(cmdq, cmdq_sm_ready);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
cmdq_sm_ready_entry(struct bfa_msgq_cmdq *cmdq)
{
}

static void
cmdq_sm_ready(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
        switch (event) {
        case CMDQ_E_STOP:
        case CMDQ_E_FAIL:
                bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
                break;

        case CMDQ_E_POST:
                bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
cmdq_sm_dbell_wait_entry(struct bfa_msgq_cmdq *cmdq)
{
        bfa_msgq_cmdq_dbell(cmdq);
}

static void
cmdq_sm_dbell_wait(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
        switch (event) {
        case CMDQ_E_STOP:
        case CMDQ_E_FAIL:
                bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
                break;

        case CMDQ_E_POST:
                cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
                break;

        case CMDQ_E_DB_READY:
                if (cmdq->flags & BFA_MSGQ_CMDQ_F_DB_UPDATE) {
                        cmdq->flags &= ~BFA_MSGQ_CMDQ_F_DB_UPDATE;
                        bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
                } else
                        bfa_fsm_set_state(cmdq, cmdq_sm_ready);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
bfa_msgq_cmdq_dbell_ready(void *arg)
{
        struct bfa_msgq_cmdq *cmdq = (struct bfa_msgq_cmdq *)arg;
        bfa_fsm_send_event(cmdq, CMDQ_E_DB_READY);
}

static void
bfa_msgq_cmdq_dbell(struct bfa_msgq_cmdq *cmdq)
{
        struct bfi_msgq_h2i_db *dbell =
                (struct bfi_msgq_h2i_db *)(&cmdq->dbell_mb.msg[0]);

        memset(dbell, 0, sizeof(struct bfi_msgq_h2i_db));
        bfi_h2i_set(dbell->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_DOORBELL_PI, 0);
        dbell->mh.mtag.i2htok = 0;
        dbell->idx.cmdq_pi = htons(cmdq->producer_index);

        if (!bfa_nw_ioc_mbox_queue(cmdq->msgq->ioc, &cmdq->dbell_mb,
                                bfa_msgq_cmdq_dbell_ready, cmdq)) {
                bfa_msgq_cmdq_dbell_ready(cmdq);
        }
}

static void
__cmd_copy(struct bfa_msgq_cmdq *cmdq, struct bfa_msgq_cmd_entry *cmd)
{
        size_t len = cmd->msg_size;
        size_t to_copy;
        u8 *src, *dst;

        src = (u8 *)cmd->msg_hdr;
        dst = (u8 *)cmdq->addr.kva;
        dst += (cmdq->producer_index * BFI_MSGQ_CMD_ENTRY_SIZE);

        while (len) {
                to_copy = (len < BFI_MSGQ_CMD_ENTRY_SIZE) ?
                                len : BFI_MSGQ_CMD_ENTRY_SIZE;
                memcpy(dst, src, to_copy);
                len -= to_copy;
                src += BFI_MSGQ_CMD_ENTRY_SIZE;
                BFA_MSGQ_INDX_ADD(cmdq->producer_index, 1, cmdq->depth);
                dst = (u8 *)cmdq->addr.kva;
                dst += (cmdq->producer_index * BFI_MSGQ_CMD_ENTRY_SIZE);
        }

}

static void
bfa_msgq_cmdq_ci_update(struct bfa_msgq_cmdq *cmdq, struct bfi_mbmsg *mb)
{
        struct bfi_msgq_i2h_db *dbell = (struct bfi_msgq_i2h_db *)mb;
        struct bfa_msgq_cmd_entry *cmd;
        int posted = 0;

        cmdq->consumer_index = ntohs(dbell->idx.cmdq_ci);

        /* Walk through pending list to see if the command can be posted */
        while (!list_empty(&cmdq->pending_q)) {
                cmd = list_first_entry(&cmdq->pending_q,
                                       struct bfa_msgq_cmd_entry, qe);
                if (ntohs(cmd->msg_hdr->num_entries) <=
                        BFA_MSGQ_FREE_CNT(cmdq)) {
                        list_del(&cmd->qe);
                        __cmd_copy(cmdq, cmd);
                        posted = 1;
                        call_cmdq_ent_cbfn(cmd, BFA_STATUS_OK);
                } else {
                        break;
                }
        }

        if (posted)
                bfa_fsm_send_event(cmdq, CMDQ_E_POST);
}

static void
bfa_msgq_cmdq_copy_next(void *arg)
{
        struct bfa_msgq_cmdq *cmdq = (struct bfa_msgq_cmdq *)arg;

        if (cmdq->bytes_to_copy)
                bfa_msgq_cmdq_copy_rsp(cmdq);
}

static void
bfa_msgq_cmdq_copy_req(struct bfa_msgq_cmdq *cmdq, struct bfi_mbmsg *mb)
{
        struct bfi_msgq_i2h_cmdq_copy_req *req =
                (struct bfi_msgq_i2h_cmdq_copy_req *)mb;

        cmdq->token = 0;
        cmdq->offset = ntohs(req->offset);
        cmdq->bytes_to_copy = ntohs(req->len);
        bfa_msgq_cmdq_copy_rsp(cmdq);
}

static void
bfa_msgq_cmdq_copy_rsp(struct bfa_msgq_cmdq *cmdq)
{
        struct bfi_msgq_h2i_cmdq_copy_rsp *rsp =
                (struct bfi_msgq_h2i_cmdq_copy_rsp *)&cmdq->copy_mb.msg[0];
        int copied;
        u8 *addr = (u8 *)cmdq->addr.kva;

        memset(rsp, 0, sizeof(struct bfi_msgq_h2i_cmdq_copy_rsp));
        bfi_h2i_set(rsp->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_CMDQ_COPY_RSP, 0);
        rsp->mh.mtag.i2htok = htons(cmdq->token);
        copied = (cmdq->bytes_to_copy >= BFI_CMD_COPY_SZ) ? BFI_CMD_COPY_SZ :
                cmdq->bytes_to_copy;
        addr += cmdq->offset;
        memcpy(rsp->data, addr, copied);

        cmdq->token++;
        cmdq->offset += copied;
        cmdq->bytes_to_copy -= copied;

        if (!bfa_nw_ioc_mbox_queue(cmdq->msgq->ioc, &cmdq->copy_mb,
                                bfa_msgq_cmdq_copy_next, cmdq)) {
                bfa_msgq_cmdq_copy_next(cmdq);
        }
}

static void
bfa_msgq_cmdq_attach(struct bfa_msgq_cmdq *cmdq, struct bfa_msgq *msgq)
{
        cmdq->depth = BFA_MSGQ_CMDQ_NUM_ENTRY;
        INIT_LIST_HEAD(&cmdq->pending_q);
        cmdq->msgq = msgq;
        bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
}

static void bfa_msgq_rspq_dbell(struct bfa_msgq_rspq *rspq);

enum rspq_event {
        RSPQ_E_START                    = 1,
        RSPQ_E_STOP                     = 2,
        RSPQ_E_FAIL                     = 3,
        RSPQ_E_RESP                     = 4,
        RSPQ_E_INIT_RESP                = 5,
        RSPQ_E_DB_READY                 = 6,
};

bfa_fsm_state_decl(rspq, stopped, struct bfa_msgq_rspq, enum rspq_event);
bfa_fsm_state_decl(rspq, init_wait, struct bfa_msgq_rspq,
                        enum rspq_event);
bfa_fsm_state_decl(rspq, ready, struct bfa_msgq_rspq, enum rspq_event);
bfa_fsm_state_decl(rspq, dbell_wait, struct bfa_msgq_rspq,
                        enum rspq_event);

static void
rspq_sm_stopped_entry(struct bfa_msgq_rspq *rspq)
{
        rspq->producer_index = 0;
        rspq->consumer_index = 0;
        rspq->flags = 0;
}

static void
rspq_sm_stopped(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
        switch (event) {
        case RSPQ_E_START:
                bfa_fsm_set_state(rspq, rspq_sm_init_wait);
                break;

        case RSPQ_E_STOP:
        case RSPQ_E_FAIL:
                /* No-op */
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
rspq_sm_init_wait_entry(struct bfa_msgq_rspq *rspq)
{
        bfa_wc_down(&rspq->msgq->init_wc);
}

static void
rspq_sm_init_wait(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
        switch (event) {
        case RSPQ_E_FAIL:
        case RSPQ_E_STOP:
                bfa_fsm_set_state(rspq, rspq_sm_stopped);
                break;

        case RSPQ_E_INIT_RESP:
                bfa_fsm_set_state(rspq, rspq_sm_ready);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
rspq_sm_ready_entry(struct bfa_msgq_rspq *rspq)
{
}

static void
rspq_sm_ready(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
        switch (event) {
        case RSPQ_E_STOP:
        case RSPQ_E_FAIL:
                bfa_fsm_set_state(rspq, rspq_sm_stopped);
                break;

        case RSPQ_E_RESP:
                bfa_fsm_set_state(rspq, rspq_sm_dbell_wait);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
rspq_sm_dbell_wait_entry(struct bfa_msgq_rspq *rspq)
{
        if (!bfa_nw_ioc_is_disabled(rspq->msgq->ioc))
                bfa_msgq_rspq_dbell(rspq);
}

static void
rspq_sm_dbell_wait(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
        switch (event) {
        case RSPQ_E_STOP:
        case RSPQ_E_FAIL:
                bfa_fsm_set_state(rspq, rspq_sm_stopped);
                break;

        case RSPQ_E_RESP:
                rspq->flags |= BFA_MSGQ_RSPQ_F_DB_UPDATE;
                break;

        case RSPQ_E_DB_READY:
                if (rspq->flags & BFA_MSGQ_RSPQ_F_DB_UPDATE) {
                        rspq->flags &= ~BFA_MSGQ_RSPQ_F_DB_UPDATE;
                        bfa_fsm_set_state(rspq, rspq_sm_dbell_wait);
                } else
                        bfa_fsm_set_state(rspq, rspq_sm_ready);
                break;

        default:
                bfa_sm_fault(event);
        }
}

static void
bfa_msgq_rspq_dbell_ready(void *arg)
{
        struct bfa_msgq_rspq *rspq = (struct bfa_msgq_rspq *)arg;
        bfa_fsm_send_event(rspq, RSPQ_E_DB_READY);
}

static void
bfa_msgq_rspq_dbell(struct bfa_msgq_rspq *rspq)
{
        struct bfi_msgq_h2i_db *dbell =
                (struct bfi_msgq_h2i_db *)(&rspq->dbell_mb.msg[0]);

        memset(dbell, 0, sizeof(struct bfi_msgq_h2i_db));
        bfi_h2i_set(dbell->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_DOORBELL_CI, 0);
        dbell->mh.mtag.i2htok = 0;
        dbell->idx.rspq_ci = htons(rspq->consumer_index);

        if (!bfa_nw_ioc_mbox_queue(rspq->msgq->ioc, &rspq->dbell_mb,
                                bfa_msgq_rspq_dbell_ready, rspq)) {
                bfa_msgq_rspq_dbell_ready(rspq);
        }
}

static void
bfa_msgq_rspq_pi_update(struct bfa_msgq_rspq *rspq, struct bfi_mbmsg *mb)
{
        struct bfi_msgq_i2h_db *dbell = (struct bfi_msgq_i2h_db *)mb;
        struct bfi_msgq_mhdr *msghdr;
        int num_entries;
        int mc;
        u8 *rspq_qe;

        rspq->producer_index = ntohs(dbell->idx.rspq_pi);

        while (rspq->consumer_index != rspq->producer_index) {
                rspq_qe = (u8 *)rspq->addr.kva;
                rspq_qe += (rspq->consumer_index * BFI_MSGQ_RSP_ENTRY_SIZE);
                msghdr = (struct bfi_msgq_mhdr *)rspq_qe;

                mc = msghdr->msg_class;
                num_entries = ntohs(msghdr->num_entries);

                if ((mc >= BFI_MC_MAX) || (rspq->rsphdlr[mc].cbfn == NULL))
                        break;

                (rspq->rsphdlr[mc].cbfn)(rspq->rsphdlr[mc].cbarg, msghdr);

                BFA_MSGQ_INDX_ADD(rspq->consumer_index, num_entries,
                                rspq->depth);
        }

        bfa_fsm_send_event(rspq, RSPQ_E_RESP);
}

static void
bfa_msgq_rspq_attach(struct bfa_msgq_rspq *rspq, struct bfa_msgq *msgq)
{
        rspq->depth = BFA_MSGQ_RSPQ_NUM_ENTRY;
        rspq->msgq = msgq;
        bfa_fsm_set_state(rspq, rspq_sm_stopped);
}

static void
bfa_msgq_init_rsp(struct bfa_msgq *msgq,
                 struct bfi_mbmsg *mb)
{
        bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_INIT_RESP);
        bfa_fsm_send_event(&msgq->rspq, RSPQ_E_INIT_RESP);
}

static void
bfa_msgq_init(void *arg)
{
        struct bfa_msgq *msgq = (struct bfa_msgq *)arg;
        struct bfi_msgq_cfg_req *msgq_cfg =
                (struct bfi_msgq_cfg_req *)&msgq->init_mb.msg[0];

        memset(msgq_cfg, 0, sizeof(struct bfi_msgq_cfg_req));
        bfi_h2i_set(msgq_cfg->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_INIT_REQ, 0);
        msgq_cfg->mh.mtag.i2htok = 0;

        bfa_dma_be_addr_set(msgq_cfg->cmdq.addr, msgq->cmdq.addr.pa);
        msgq_cfg->cmdq.q_depth = htons(msgq->cmdq.depth);
        bfa_dma_be_addr_set(msgq_cfg->rspq.addr, msgq->rspq.addr.pa);
        msgq_cfg->rspq.q_depth = htons(msgq->rspq.depth);

        bfa_nw_ioc_mbox_queue(msgq->ioc, &msgq->init_mb, NULL, NULL);
}

static void
bfa_msgq_isr(void *cbarg, struct bfi_mbmsg *msg)
{
        struct bfa_msgq *msgq = (struct bfa_msgq *)cbarg;

        switch (msg->mh.msg_id) {
        case BFI_MSGQ_I2H_INIT_RSP:
                bfa_msgq_init_rsp(msgq, msg);
                break;

        case BFI_MSGQ_I2H_DOORBELL_PI:
                bfa_msgq_rspq_pi_update(&msgq->rspq, msg);
                break;

        case BFI_MSGQ_I2H_DOORBELL_CI:
                bfa_msgq_cmdq_ci_update(&msgq->cmdq, msg);
                break;

        case BFI_MSGQ_I2H_CMDQ_COPY_REQ:
                bfa_msgq_cmdq_copy_req(&msgq->cmdq, msg);
                break;

        default:
                BUG_ON(1);
        }
}

static void
bfa_msgq_notify(void *cbarg, enum bfa_ioc_event event)
{
        struct bfa_msgq *msgq = (struct bfa_msgq *)cbarg;

        switch (event) {
        case BFA_IOC_E_ENABLED:
                bfa_wc_init(&msgq->init_wc, bfa_msgq_init, msgq);
                bfa_wc_up(&msgq->init_wc);
                bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_START);
                bfa_wc_up(&msgq->init_wc);
                bfa_fsm_send_event(&msgq->rspq, RSPQ_E_START);
                bfa_wc_wait(&msgq->init_wc);
                break;

        case BFA_IOC_E_DISABLED:
                bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_STOP);
                bfa_fsm_send_event(&msgq->rspq, RSPQ_E_STOP);
                break;

        case BFA_IOC_E_FAILED:
                bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_FAIL);
                bfa_fsm_send_event(&msgq->rspq, RSPQ_E_FAIL);
                break;

        default:
                break;
        }
}

u32
bfa_msgq_meminfo(void)
{
        return roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ) +
                roundup(BFA_MSGQ_RSPQ_SIZE, BFA_DMA_ALIGN_SZ);
}

void
bfa_msgq_memclaim(struct bfa_msgq *msgq, u8 *kva, u64 pa)
{
        msgq->cmdq.addr.kva = kva;
        msgq->cmdq.addr.pa  = pa;

        kva += roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ);
        pa += roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ);

        msgq->rspq.addr.kva = kva;
        msgq->rspq.addr.pa = pa;
}

void
bfa_msgq_attach(struct bfa_msgq *msgq, struct bfa_ioc *ioc)
{
        msgq->ioc    = ioc;

        bfa_msgq_cmdq_attach(&msgq->cmdq, msgq);
        bfa_msgq_rspq_attach(&msgq->rspq, msgq);

        bfa_nw_ioc_mbox_regisr(msgq->ioc, BFI_MC_MSGQ, bfa_msgq_isr, msgq);
        bfa_ioc_notify_init(&msgq->ioc_notify, bfa_msgq_notify, msgq);
        bfa_nw_ioc_notify_register(msgq->ioc, &msgq->ioc_notify);
}

void
bfa_msgq_regisr(struct bfa_msgq *msgq, enum bfi_mclass mc,
                bfa_msgq_mcfunc_t cbfn, void *cbarg)
{
        msgq->rspq.rsphdlr[mc].cbfn     = cbfn;
        msgq->rspq.rsphdlr[mc].cbarg    = cbarg;
}

void
bfa_msgq_cmd_post(struct bfa_msgq *msgq,  struct bfa_msgq_cmd_entry *cmd)
{
        if (ntohs(cmd->msg_hdr->num_entries) <=
                BFA_MSGQ_FREE_CNT(&msgq->cmdq)) {
                __cmd_copy(&msgq->cmdq, cmd);
                call_cmdq_ent_cbfn(cmd, BFA_STATUS_OK);
                bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_POST);
        } else {
                list_add_tail(&cmd->qe, &msgq->cmdq.pending_q);
        }
}

void
bfa_msgq_rsp_copy(struct bfa_msgq *msgq, u8 *buf, size_t buf_len)
{
        struct bfa_msgq_rspq *rspq = &msgq->rspq;
        size_t len = buf_len;
        size_t to_copy;
        int ci;
        u8 *src, *dst;

        ci = rspq->consumer_index;
        src = (u8 *)rspq->addr.kva;
        src += (ci * BFI_MSGQ_RSP_ENTRY_SIZE);
        dst = buf;

        while (len) {
                to_copy = (len < BFI_MSGQ_RSP_ENTRY_SIZE) ?
                                len : BFI_MSGQ_RSP_ENTRY_SIZE;
                memcpy(dst, src, to_copy);
                len -= to_copy;
                dst += BFI_MSGQ_RSP_ENTRY_SIZE;
                BFA_MSGQ_INDX_ADD(ci, 1, rspq->depth);
                src = (u8 *)rspq->addr.kva;
                src += (ci * BFI_MSGQ_RSP_ENTRY_SIZE);
        }
}