[SCSI] bfa: Brocade BFA FC SCSI driver

Add new driver for Brocade Hardware

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 782 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_fcxp.c b/drivers/scsi/bfa/bfa_fcxp.c
new file mode 100644
index 00000000000..4754a0e9006
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_fcxp.c
@@ -0,0 +1,782 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <bfa.h>
+#include <bfi/bfi_uf.h>
+#include <cs/bfa_debug.h>
+
+BFA_TRC_FILE(HAL, FCXP);
+BFA_MODULE(fcxp);
+
+/**
+ * forward declarations
+ */
+static void     __bfa_fcxp_send_cbfn(void *cbarg, bfa_boolean_t complete);
+static void     hal_fcxp_rx_plog(struct bfa_s *bfa, struct bfa_fcxp_s *fcxp,
+                                 struct bfi_fcxp_send_rsp_s *fcxp_rsp);
+static void     hal_fcxp_tx_plog(struct bfa_s *bfa, u32 reqlen,
+                                 struct bfa_fcxp_s *fcxp, struct fchs_s *fchs);
+static void     bfa_fcxp_qresume(void *cbarg);
+static void     bfa_fcxp_queue(struct bfa_fcxp_s *fcxp,
+                               struct bfi_fcxp_send_req_s *send_req);
+
+/**
+ *  fcxp_pvt BFA FCXP private functions
+ */
+
+static void
+claim_fcxp_req_rsp_mem(struct bfa_fcxp_mod_s *mod, struct bfa_meminfo_s *mi)
+{
+        u8        *dm_kva = NULL;
+        u64        dm_pa;
+        u32        buf_pool_sz;
+
+        dm_kva = bfa_meminfo_dma_virt(mi);
+        dm_pa = bfa_meminfo_dma_phys(mi);
+
+        buf_pool_sz = mod->req_pld_sz * mod->num_fcxps;
+
+        /*
+         * Initialize the fcxp req payload list
+         */
+        mod->req_pld_list_kva = dm_kva;
+        mod->req_pld_list_pa = dm_pa;
+        dm_kva += buf_pool_sz;
+        dm_pa += buf_pool_sz;
+        bfa_os_memset(mod->req_pld_list_kva, 0, buf_pool_sz);
+
+        /*
+         * Initialize the fcxp rsp payload list
+         */
+        buf_pool_sz = mod->rsp_pld_sz * mod->num_fcxps;
+        mod->rsp_pld_list_kva = dm_kva;
+        mod->rsp_pld_list_pa = dm_pa;
+        dm_kva += buf_pool_sz;
+        dm_pa += buf_pool_sz;
+        bfa_os_memset(mod->rsp_pld_list_kva, 0, buf_pool_sz);
+
+        bfa_meminfo_dma_virt(mi) = dm_kva;
+        bfa_meminfo_dma_phys(mi) = dm_pa;
+}
+
+static void
+claim_fcxps_mem(struct bfa_fcxp_mod_s *mod, struct bfa_meminfo_s *mi)
+{
+        u16        i;
+        struct bfa_fcxp_s *fcxp;
+
+        fcxp = (struct bfa_fcxp_s *) bfa_meminfo_kva(mi);
+        bfa_os_memset(fcxp, 0, sizeof(struct bfa_fcxp_s) * mod->num_fcxps);
+
+        INIT_LIST_HEAD(&mod->fcxp_free_q);
+        INIT_LIST_HEAD(&mod->fcxp_active_q);
+
+        mod->fcxp_list = fcxp;
+
+        for (i = 0; i < mod->num_fcxps; i++) {
+                fcxp->fcxp_mod = mod;
+                fcxp->fcxp_tag = i;
+
+                list_add_tail(&fcxp->qe, &mod->fcxp_free_q);
+                bfa_reqq_winit(&fcxp->reqq_wqe, bfa_fcxp_qresume, fcxp);
+                fcxp->reqq_waiting = BFA_FALSE;
+
+                fcxp = fcxp + 1;
+        }
+
+        bfa_meminfo_kva(mi) = (void *)fcxp;
+}
+
+static void
+bfa_fcxp_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *ndm_len,
+                u32 *dm_len)
+{
+        u16        num_fcxp_reqs = cfg->fwcfg.num_fcxp_reqs;
+
+        if (num_fcxp_reqs == 0)
+                return;
+
+        /*
+         * Account for req/rsp payload
+         */
+        *dm_len += BFA_FCXP_MAX_IBUF_SZ * num_fcxp_reqs;
+        if (cfg->drvcfg.min_cfg)
+                *dm_len += BFA_FCXP_MAX_IBUF_SZ * num_fcxp_reqs;
+        else
+                *dm_len += BFA_FCXP_MAX_LBUF_SZ * num_fcxp_reqs;
+
+        /*
+         * Account for fcxp structs
+         */
+        *ndm_len += sizeof(struct bfa_fcxp_s) * num_fcxp_reqs;
+}
+
+static void
+bfa_fcxp_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
+                    struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
+{
+        struct bfa_fcxp_mod_s *mod = BFA_FCXP_MOD(bfa);
+
+        bfa_os_memset(mod, 0, sizeof(struct bfa_fcxp_mod_s));
+        mod->bfa = bfa;
+        mod->num_fcxps = cfg->fwcfg.num_fcxp_reqs;
+
+        /**
+         * Initialize FCXP request and response payload sizes.
+         */
+        mod->req_pld_sz = mod->rsp_pld_sz = BFA_FCXP_MAX_IBUF_SZ;
+        if (!cfg->drvcfg.min_cfg)
+                mod->rsp_pld_sz = BFA_FCXP_MAX_LBUF_SZ;
+
+        INIT_LIST_HEAD(&mod->wait_q);
+
+        claim_fcxp_req_rsp_mem(mod, meminfo);
+        claim_fcxps_mem(mod, meminfo);
+}
+
+static void
+bfa_fcxp_initdone(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_fcxp_detach(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_fcxp_start(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_fcxp_stop(struct bfa_s *bfa)
+{
+}
+
+static void
+bfa_fcxp_iocdisable(struct bfa_s *bfa)
+{
+        struct bfa_fcxp_mod_s *mod = BFA_FCXP_MOD(bfa);
+        struct bfa_fcxp_s *fcxp;
+        struct list_head        *qe, *qen;
+
+        list_for_each_safe(qe, qen, &mod->fcxp_active_q) {
+                fcxp = (struct bfa_fcxp_s *) qe;
+                if (fcxp->caller == NULL) {
+                        fcxp->send_cbfn(fcxp->caller, fcxp, fcxp->send_cbarg,
+                                        BFA_STATUS_IOC_FAILURE, 0, 0, NULL);
+                        bfa_fcxp_free(fcxp);
+                } else {
+                        fcxp->rsp_status = BFA_STATUS_IOC_FAILURE;
+                        bfa_cb_queue(bfa, &fcxp->hcb_qe,
+                                      __bfa_fcxp_send_cbfn, fcxp);
+                }
+        }
+}
+
+static struct bfa_fcxp_s *
+bfa_fcxp_get(struct bfa_fcxp_mod_s *fm)
+{
+        struct bfa_fcxp_s *fcxp;
+
+        bfa_q_deq(&fm->fcxp_free_q, &fcxp);
+
+        if (fcxp)
+                list_add_tail(&fcxp->qe, &fm->fcxp_active_q);
+
+        return (fcxp);
+}
+
+static void
+bfa_fcxp_put(struct bfa_fcxp_s *fcxp)
+{
+        struct bfa_fcxp_mod_s *mod = fcxp->fcxp_mod;
+        struct bfa_fcxp_wqe_s *wqe;
+
+        bfa_q_deq(&mod->wait_q, &wqe);
+        if (wqe) {
+                bfa_trc(mod->bfa, fcxp->fcxp_tag);
+                wqe->alloc_cbfn(wqe->alloc_cbarg, fcxp);
+                return;
+        }
+
+        bfa_assert(bfa_q_is_on_q(&mod->fcxp_active_q, fcxp));
+        list_del(&fcxp->qe);
+        list_add_tail(&fcxp->qe, &mod->fcxp_free_q);
+}
+
+static void
+bfa_fcxp_null_comp(void *bfad_fcxp, struct bfa_fcxp_s *fcxp, void *cbarg,
+                       bfa_status_t req_status, u32 rsp_len,
+                       u32 resid_len, struct fchs_s *rsp_fchs)
+{
+        /**discarded fcxp completion */
+}
+
+static void
+__bfa_fcxp_send_cbfn(void *cbarg, bfa_boolean_t complete)
+{
+        struct bfa_fcxp_s *fcxp = cbarg;
+
+        if (complete) {
+                fcxp->send_cbfn(fcxp->caller, fcxp, fcxp->send_cbarg,
+                                fcxp->rsp_status, fcxp->rsp_len,
+                                fcxp->residue_len, &fcxp->rsp_fchs);
+        } else {
+                bfa_fcxp_free(fcxp);
+        }
+}
+
+static void
+hal_fcxp_send_comp(struct bfa_s *bfa, struct bfi_fcxp_send_rsp_s *fcxp_rsp)
+{
+        struct bfa_fcxp_mod_s   *mod = BFA_FCXP_MOD(bfa);
+        struct bfa_fcxp_s       *fcxp;
+        u16             fcxp_tag = bfa_os_ntohs(fcxp_rsp->fcxp_tag);
+
+        bfa_trc(bfa, fcxp_tag);
+
+        fcxp_rsp->rsp_len = bfa_os_ntohl(fcxp_rsp->rsp_len);
+
+        /**
+         * @todo f/w should not set residue to non-0 when everything
+         *       is received.
+         */
+        if (fcxp_rsp->req_status == BFA_STATUS_OK)
+                fcxp_rsp->residue_len = 0;
+        else
+                fcxp_rsp->residue_len = bfa_os_ntohl(fcxp_rsp->residue_len);
+
+        fcxp = BFA_FCXP_FROM_TAG(mod, fcxp_tag);
+
+        bfa_assert(fcxp->send_cbfn != NULL);
+
+        hal_fcxp_rx_plog(mod->bfa, fcxp, fcxp_rsp);
+
+        if (fcxp->send_cbfn != NULL) {
+                if (fcxp->caller == NULL) {
+                        bfa_trc(mod->bfa, fcxp->fcxp_tag);
+
+                        fcxp->send_cbfn(fcxp->caller, fcxp, fcxp->send_cbarg,
+                                        fcxp_rsp->req_status, fcxp_rsp->rsp_len,
+                                        fcxp_rsp->residue_len, &fcxp_rsp->fchs);
+                        /*
+                         * fcxp automatically freed on return from the callback
+                         */
+                        bfa_fcxp_free(fcxp);
+                } else {
+                        bfa_trc(mod->bfa, fcxp->fcxp_tag);
+                        fcxp->rsp_status = fcxp_rsp->req_status;
+                        fcxp->rsp_len = fcxp_rsp->rsp_len;
+                        fcxp->residue_len = fcxp_rsp->residue_len;
+                        fcxp->rsp_fchs = fcxp_rsp->fchs;
+
+                        bfa_cb_queue(bfa, &fcxp->hcb_qe,
+                                      __bfa_fcxp_send_cbfn, fcxp);
+                }
+        } else {
+                bfa_trc(bfa, fcxp_tag);
+        }
+}
+
+static void
+hal_fcxp_set_local_sges(struct bfi_sge_s *sge, u32 reqlen, u64 req_pa)
+{
+        union bfi_addr_u      sga_zero = { {0} };
+
+        sge->sg_len = reqlen;
+        sge->flags = BFI_SGE_DATA_LAST;
+        bfa_dma_addr_set(sge[0].sga, req_pa);
+        bfa_sge_to_be(sge);
+        sge++;
+
+        sge->sga = sga_zero;
+        sge->sg_len = reqlen;
+        sge->flags = BFI_SGE_PGDLEN;
+        bfa_sge_to_be(sge);
+}
+
+static void
+hal_fcxp_tx_plog(struct bfa_s *bfa, u32 reqlen, struct bfa_fcxp_s *fcxp,
+                 struct fchs_s *fchs)
+{
+        /*
+         * TODO: TX ox_id
+         */
+        if (reqlen > 0) {
+                if (fcxp->use_ireqbuf) {
+                        u32        pld_w0 =
+                                *((u32 *) BFA_FCXP_REQ_PLD(fcxp));
+
+                        bfa_plog_fchdr_and_pl(bfa->plog, BFA_PL_MID_HAL_FCXP,
+                                BFA_PL_EID_TX,
+                                reqlen + sizeof(struct fchs_s), fchs, pld_w0);
+                } else {
+                        bfa_plog_fchdr(bfa->plog, BFA_PL_MID_HAL_FCXP,
+                                BFA_PL_EID_TX, reqlen + sizeof(struct fchs_s),
+                                fchs);
+                }
+        } else {
+                bfa_plog_fchdr(bfa->plog, BFA_PL_MID_HAL_FCXP, BFA_PL_EID_TX,
+                               reqlen + sizeof(struct fchs_s), fchs);
+        }
+}
+
+static void
+hal_fcxp_rx_plog(struct bfa_s *bfa, struct bfa_fcxp_s *fcxp,
+                 struct bfi_fcxp_send_rsp_s *fcxp_rsp)
+{
+        if (fcxp_rsp->rsp_len > 0) {
+                if (fcxp->use_irspbuf) {
+                        u32        pld_w0 =
+                                *((u32 *) BFA_FCXP_RSP_PLD(fcxp));
+
+                        bfa_plog_fchdr_and_pl(bfa->plog, BFA_PL_MID_HAL_FCXP,
+                                              BFA_PL_EID_RX,
+                                              (u16) fcxp_rsp->rsp_len,
+                                              &fcxp_rsp->fchs, pld_w0);
+                } else {
+                        bfa_plog_fchdr(bfa->plog, BFA_PL_MID_HAL_FCXP,
+                                       BFA_PL_EID_RX,
+                                       (u16) fcxp_rsp->rsp_len,
+                                       &fcxp_rsp->fchs);
+                }
+        } else {
+                bfa_plog_fchdr(bfa->plog, BFA_PL_MID_HAL_FCXP, BFA_PL_EID_RX,
+                               (u16) fcxp_rsp->rsp_len, &fcxp_rsp->fchs);
+        }
+}
+
+/**
+ * Handler to resume sending fcxp when space in available in cpe queue.
+ */
+static void
+bfa_fcxp_qresume(void *cbarg)
+{
+        struct bfa_fcxp_s               *fcxp = cbarg;
+        struct bfa_s                    *bfa = fcxp->fcxp_mod->bfa;
+        struct bfi_fcxp_send_req_s      *send_req;
+
+        fcxp->reqq_waiting = BFA_FALSE;
+        send_req = bfa_reqq_next(bfa, BFA_REQQ_FCXP);
+        bfa_fcxp_queue(fcxp, send_req);
+}
+
+/**
+ * Queue fcxp send request to foimrware.
+ */
+static void
+bfa_fcxp_queue(struct bfa_fcxp_s *fcxp, struct bfi_fcxp_send_req_s *send_req)
+{
+        struct bfa_s                    *bfa = fcxp->fcxp_mod->bfa;
+        struct bfa_fcxp_req_info_s      *reqi = &fcxp->req_info;
+        struct bfa_fcxp_rsp_info_s      *rspi = &fcxp->rsp_info;
+        struct bfa_rport_s              *rport = reqi->bfa_rport;
+
+        bfi_h2i_set(send_req->mh, BFI_MC_FCXP, BFI_FCXP_H2I_SEND_REQ,
+                        bfa_lpuid(bfa));
+
+        send_req->fcxp_tag = bfa_os_htons(fcxp->fcxp_tag);
+        if (rport) {
+                send_req->rport_fw_hndl = rport->fw_handle;
+                send_req->max_frmsz = bfa_os_htons(rport->rport_info.max_frmsz);
+                if (send_req->max_frmsz == 0)
+                        send_req->max_frmsz = bfa_os_htons(FC_MAX_PDUSZ);
+        } else {
+                send_req->rport_fw_hndl = 0;
+                send_req->max_frmsz = bfa_os_htons(FC_MAX_PDUSZ);
+        }
+
+        send_req->vf_id = bfa_os_htons(reqi->vf_id);
+        send_req->lp_tag = reqi->lp_tag;
+        send_req->class = reqi->class;
+        send_req->rsp_timeout = rspi->rsp_timeout;
+        send_req->cts = reqi->cts;
+        send_req->fchs = reqi->fchs;
+
+        send_req->req_len = bfa_os_htonl(reqi->req_tot_len);
+        send_req->rsp_maxlen = bfa_os_htonl(rspi->rsp_maxlen);
+
+        /*
+         * setup req sgles
+         */
+        if (fcxp->use_ireqbuf == 1) {
+                hal_fcxp_set_local_sges(send_req->req_sge, reqi->req_tot_len,
+                                        BFA_FCXP_REQ_PLD_PA(fcxp));
+        } else {
+                if (fcxp->nreq_sgles > 0) {
+                        bfa_assert(fcxp->nreq_sgles == 1);
+                        hal_fcxp_set_local_sges(send_req->req_sge,
+                                                reqi->req_tot_len,
+                                                fcxp->req_sga_cbfn(fcxp->caller,
+                                                                   0));
+                } else {
+                        bfa_assert(reqi->req_tot_len == 0);
+                        hal_fcxp_set_local_sges(send_req->rsp_sge, 0, 0);
+                }
+        }
+
+        /*
+         * setup rsp sgles
+         */
+        if (fcxp->use_irspbuf == 1) {
+                bfa_assert(rspi->rsp_maxlen <= BFA_FCXP_MAX_LBUF_SZ);
+
+                hal_fcxp_set_local_sges(send_req->rsp_sge, rspi->rsp_maxlen,
+                                        BFA_FCXP_RSP_PLD_PA(fcxp));
+
+        } else {
+                if (fcxp->nrsp_sgles > 0) {
+                        bfa_assert(fcxp->nrsp_sgles == 1);
+                        hal_fcxp_set_local_sges(send_req->rsp_sge,
+                                                rspi->rsp_maxlen,
+                                                fcxp->rsp_sga_cbfn(fcxp->caller,
+                                                                   0));
+                } else {
+                        bfa_assert(rspi->rsp_maxlen == 0);
+                        hal_fcxp_set_local_sges(send_req->rsp_sge, 0, 0);
+                }
+        }
+
+        hal_fcxp_tx_plog(bfa, reqi->req_tot_len, fcxp, &reqi->fchs);
+
+        bfa_reqq_produce(bfa, BFA_REQQ_FCXP);
+
+        bfa_trc(bfa, bfa_reqq_pi(bfa, BFA_REQQ_FCXP));
+        bfa_trc(bfa, bfa_reqq_ci(bfa, BFA_REQQ_FCXP));
+}
+
+
+/**
+ *  hal_fcxp_api BFA FCXP API
+ */
+
+/**
+ * Allocate an FCXP instance to send a response or to send a request
+ * that has a response. Request/response buffers are allocated by caller.
+ *
+ * @param[in]   bfa             BFA bfa instance
+ * @param[in]   nreq_sgles      Number of SG elements required for request
+ *                              buffer. 0, if fcxp internal buffers are used.
+ *                              Use bfa_fcxp_get_reqbuf() to get the
+ *                              internal req buffer.
+ * @param[in]   req_sgles       SG elements describing request buffer. Will be
+ *                              copied in by BFA and hence can be freed on
+ *                              return from this function.
+ * @param[in]   get_req_sga     function ptr to be called to get a request SG
+ *                              Address (given the sge index).
+ * @param[in]   get_req_sglen   function ptr to be called to get a request SG
+ *                              len (given the sge index).
+ * @param[in]   get_rsp_sga     function ptr to be called to get a response SG
+ *                              Address (given the sge index).
+ * @param[in]   get_rsp_sglen   function ptr to be called to get a response SG
+ *                              len (given the sge index).
+ *
+ * @return FCXP instance. NULL on failure.
+ */
+struct bfa_fcxp_s *
+bfa_fcxp_alloc(void *caller, struct bfa_s *bfa, int nreq_sgles,
+                        int nrsp_sgles, bfa_fcxp_get_sgaddr_t req_sga_cbfn,
+                        bfa_fcxp_get_sglen_t req_sglen_cbfn,
+                        bfa_fcxp_get_sgaddr_t rsp_sga_cbfn,
+                        bfa_fcxp_get_sglen_t rsp_sglen_cbfn)
+{
+        struct bfa_fcxp_s *fcxp = NULL;
+        u32        nreq_sgpg, nrsp_sgpg;
+
+        bfa_assert(bfa != NULL);
+
+        fcxp = bfa_fcxp_get(BFA_FCXP_MOD(bfa));
+        if (fcxp == NULL)
+                return (NULL);
+
+        bfa_trc(bfa, fcxp->fcxp_tag);
+
+        fcxp->caller = caller;
+
+        if (nreq_sgles == 0) {
+                fcxp->use_ireqbuf = 1;
+        } else {
+                bfa_assert(req_sga_cbfn != NULL);
+                bfa_assert(req_sglen_cbfn != NULL);
+
+                fcxp->use_ireqbuf = 0;
+                fcxp->req_sga_cbfn = req_sga_cbfn;
+                fcxp->req_sglen_cbfn = req_sglen_cbfn;
+
+                fcxp->nreq_sgles = nreq_sgles;
+
+                /*
+                 * alloc required sgpgs
+                 */
+                if (nreq_sgles > BFI_SGE_INLINE) {
+                        nreq_sgpg = BFA_SGPG_NPAGE(nreq_sgles);
+
+                        if (bfa_sgpg_malloc
+                            (bfa, &fcxp->req_sgpg_q, nreq_sgpg)
+                            != BFA_STATUS_OK) {
+                                /* bfa_sgpg_wait(bfa, &fcxp->req_sgpg_wqe,
+                                nreq_sgpg); */
+                                /*
+                                 * TODO
+                                 */
+                        }
+                }
+        }
+
+        if (nrsp_sgles == 0) {
+                fcxp->use_irspbuf = 1;
+        } else {
+                bfa_assert(rsp_sga_cbfn != NULL);
+                bfa_assert(rsp_sglen_cbfn != NULL);
+
+                fcxp->use_irspbuf = 0;
+                fcxp->rsp_sga_cbfn = rsp_sga_cbfn;
+                fcxp->rsp_sglen_cbfn = rsp_sglen_cbfn;
+
+                fcxp->nrsp_sgles = nrsp_sgles;
+                /*
+                 * alloc required sgpgs
+                 */
+                if (nrsp_sgles > BFI_SGE_INLINE) {
+                        nrsp_sgpg = BFA_SGPG_NPAGE(nreq_sgles);
+
+                        if (bfa_sgpg_malloc
+                            (bfa, &fcxp->rsp_sgpg_q, nrsp_sgpg)
+                            != BFA_STATUS_OK) {
+                                /* bfa_sgpg_wait(bfa, &fcxp->rsp_sgpg_wqe,
+                                nrsp_sgpg); */
+                                /*
+                                 * TODO
+                                 */
+                        }
+                }
+        }
+
+        return (fcxp);
+}
+
+/**
+ * Get the internal request buffer pointer
+ *
+ * @param[in]   fcxp    BFA fcxp pointer
+ *
+ * @return              pointer to the internal request buffer
+ */
+void *
+bfa_fcxp_get_reqbuf(struct bfa_fcxp_s *fcxp)
+{
+        struct bfa_fcxp_mod_s *mod = fcxp->fcxp_mod;
+        void    *reqbuf;
+
+        bfa_assert(fcxp->use_ireqbuf == 1);
+        reqbuf = ((u8 *)mod->req_pld_list_kva) +
+                        fcxp->fcxp_tag * mod->req_pld_sz;
+        return reqbuf;
+}
+
+u32
+bfa_fcxp_get_reqbufsz(struct bfa_fcxp_s *fcxp)
+{
+        struct bfa_fcxp_mod_s *mod = fcxp->fcxp_mod;
+
+        return mod->req_pld_sz;
+}
+
+/**
+ * Get the internal response buffer pointer
+ *
+ * @param[in]   fcxp    BFA fcxp pointer
+ *
+ * @return              pointer to the internal request buffer
+ */
+void *
+bfa_fcxp_get_rspbuf(struct bfa_fcxp_s *fcxp)
+{
+        struct bfa_fcxp_mod_s *mod = fcxp->fcxp_mod;
+        void    *rspbuf;
+
+        bfa_assert(fcxp->use_irspbuf == 1);
+
+        rspbuf = ((u8 *)mod->rsp_pld_list_kva) +
+                        fcxp->fcxp_tag * mod->rsp_pld_sz;
+        return rspbuf;
+}
+
+/**
+ *              Free the BFA FCXP
+ *
+ * @param[in]   fcxp                    BFA fcxp pointer
+ *
+ * @return              void
+ */
+void
+bfa_fcxp_free(struct bfa_fcxp_s *fcxp)
+{
+        struct bfa_fcxp_mod_s *mod = fcxp->fcxp_mod;
+
+        bfa_assert(fcxp != NULL);
+        bfa_trc(mod->bfa, fcxp->fcxp_tag);
+        bfa_fcxp_put(fcxp);
+}
+
+/**
+ * Send a FCXP request
+ *
+ * @param[in]   fcxp    BFA fcxp pointer
+ * @param[in]   rport   BFA rport pointer. Could be left NULL for WKA rports
+ * @param[in]   vf_id   virtual Fabric ID
+ * @param[in]   lp_tag  lport tag
+ * @param[in]   cts     use Continous sequence
+ * @param[in]   cos     fc Class of Service
+ * @param[in]   reqlen  request length, does not include FCHS length
+ * @param[in]   fchs    fc Header Pointer. The header content will be copied
+ *                      in by BFA.
+ *
+ * @param[in]   cbfn    call back function to be called on receiving
+ *                                                              the response
+ * @param[in]   cbarg   arg for cbfn
+ * @param[in]   rsp_timeout
+ *                      response timeout
+ *
+ * @return              bfa_status_t
+ */
+void
+bfa_fcxp_send(struct bfa_fcxp_s *fcxp, struct bfa_rport_s *rport,
+                u16 vf_id, u8 lp_tag, bfa_boolean_t cts, enum fc_cos cos,
+                u32 reqlen, struct fchs_s *fchs, bfa_cb_fcxp_send_t cbfn,
+                void *cbarg, u32 rsp_maxlen, u8 rsp_timeout)
+{
+        struct bfa_s                    *bfa  = fcxp->fcxp_mod->bfa;
+        struct bfa_fcxp_req_info_s      *reqi = &fcxp->req_info;
+        struct bfa_fcxp_rsp_info_s      *rspi = &fcxp->rsp_info;
+        struct bfi_fcxp_send_req_s      *send_req;
+
+        bfa_trc(bfa, fcxp->fcxp_tag);
+
+        /**
+         * setup request/response info
+         */
+        reqi->bfa_rport = rport;
+        reqi->vf_id = vf_id;
+        reqi->lp_tag = lp_tag;
+        reqi->class = cos;
+        rspi->rsp_timeout = rsp_timeout;
+        reqi->cts = cts;
+        reqi->fchs = *fchs;
+        reqi->req_tot_len = reqlen;
+        rspi->rsp_maxlen = rsp_maxlen;
+        fcxp->send_cbfn = cbfn ? cbfn : bfa_fcxp_null_comp;
+        fcxp->send_cbarg = cbarg;
+
+        /**
+         * If no room in CPE queue, wait for
+         */
+        send_req = bfa_reqq_next(bfa, BFA_REQQ_FCXP);
+        if (!send_req) {
+                bfa_trc(bfa, fcxp->fcxp_tag);
+                fcxp->reqq_waiting = BFA_TRUE;
+                bfa_reqq_wait(bfa, BFA_REQQ_FCXP, &fcxp->reqq_wqe);
+                return;
+        }
+
+        bfa_fcxp_queue(fcxp, send_req);
+}
+
+/**
+ * Abort a BFA FCXP
+ *
+ * @param[in]   fcxp    BFA fcxp pointer
+ *
+ * @return              void
+ */
+bfa_status_t
+bfa_fcxp_abort(struct bfa_fcxp_s *fcxp)
+{
+        bfa_assert(0);
+        return (BFA_STATUS_OK);
+}
+
+void
+bfa_fcxp_alloc_wait(struct bfa_s *bfa, struct bfa_fcxp_wqe_s *wqe,
+                        bfa_fcxp_alloc_cbfn_t alloc_cbfn, void *alloc_cbarg)
+{
+        struct bfa_fcxp_mod_s *mod = BFA_FCXP_MOD(bfa);
+
+        bfa_assert(list_empty(&mod->fcxp_free_q));
+
+        wqe->alloc_cbfn = alloc_cbfn;
+        wqe->alloc_cbarg = alloc_cbarg;
+        list_add_tail(&wqe->qe, &mod->wait_q);
+}
+
+void
+bfa_fcxp_walloc_cancel(struct bfa_s *bfa, struct bfa_fcxp_wqe_s *wqe)
+{
+        struct bfa_fcxp_mod_s *mod = BFA_FCXP_MOD(bfa);
+
+        bfa_assert(bfa_q_is_on_q(&mod->wait_q, wqe));
+        list_del(&wqe->qe);
+}
+
+void
+bfa_fcxp_discard(struct bfa_fcxp_s *fcxp)
+{
+        /**
+         * If waiting for room in request queue, cancel reqq wait
+         * and free fcxp.
+         */
+        if (fcxp->reqq_waiting) {
+                fcxp->reqq_waiting = BFA_FALSE;
+                bfa_reqq_wcancel(&fcxp->reqq_wqe);
+                bfa_fcxp_free(fcxp);
+                return;
+        }
+
+        fcxp->send_cbfn = bfa_fcxp_null_comp;
+}
+
+
+
+/**
+ *  hal_fcxp_public BFA FCXP public functions
+ */
+
+void
+bfa_fcxp_isr(struct bfa_s *bfa, struct bfi_msg_s *msg)
+{
+        switch (msg->mhdr.msg_id) {
+        case BFI_FCXP_I2H_SEND_RSP:
+                hal_fcxp_send_comp(bfa, (struct bfi_fcxp_send_rsp_s *) msg);
+                break;
+
+        default:
+                bfa_trc(bfa, msg->mhdr.msg_id);
+                bfa_assert(0);
+        }
+}
+
+u32
+bfa_fcxp_get_maxrsp(struct bfa_s *bfa)
+{
+        struct bfa_fcxp_mod_s *mod = BFA_FCXP_MOD(bfa);
+
+        return mod->rsp_pld_sz;
+}
+
+