/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2006      Sandia National Laboratories. All rights
 *                         reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#include "btl_ofud.h"
#include "btl_ofud_frag.h"
#include "ompi/mca/mpool/rdma/mpool_rdma.h"


static inline void mca_btl_ud_frag_common_constructor(mca_btl_ud_frag_t* frag)
{
    frag->ud_reg = (mca_btl_ud_reg_t*)frag->base.super.registration;
    frag->sg_entry.lkey = frag->ud_reg->mr->lkey;
    frag->base.des_flags = 0;
    frag->base.order = MCA_BTL_NO_ORDER;
}


static void mca_btl_ud_send_frag_constructor(mca_btl_ud_frag_t* frag)
{
    frag->type = MCA_BTL_UD_FRAG_SEND;
    mca_btl_ud_frag_common_constructor(frag);
    frag->base.des_src = &frag->segment;
    frag->base.des_src_cnt = 1;
    frag->base.des_dst = NULL;
    frag->base.des_dst_cnt = 0;

    /* We do not include the mca_btl_ud_ib_header_t data when sending */
    frag->hdr = frag->base.super.ptr;
    frag->segment.seg_addr.pval = frag->hdr + 1;

    frag->sg_entry.addr = (unsigned long)frag->hdr;

    frag->wr_desc.sr_desc.wr_id = (unsigned long)frag;
    frag->wr_desc.sr_desc.sg_list = &frag->sg_entry;
    frag->wr_desc.sr_desc.num_sge = 1;
    frag->wr_desc.sr_desc.opcode = IBV_WR_SEND;
    frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED;
    frag->wr_desc.sr_desc.next = NULL;
    frag->wr_desc.sr_desc.wr.ud.remote_qkey = mca_btl_ofud_component.ib_qkey;
}


static void mca_btl_ud_user_frag_constructor(mca_btl_ud_frag_t* frag)
{
    mca_btl_ud_send_frag_constructor(frag);
    frag->type = MCA_BTL_UD_FRAG_USER;
}


static void mca_btl_ud_recv_frag_constructor(mca_btl_ud_frag_t* frag)
{
    frag->type = MCA_BTL_UD_FRAG_RECV;
    mca_btl_ud_frag_common_constructor(frag);
    frag->base.des_dst = &frag->segment;
    frag->base.des_dst_cnt = 1;
    frag->base.des_src = NULL;
    frag->base.des_src_cnt = 0;

    /* Receive frag headers start 40 bytes later */
    frag->hdr = (mca_btl_ud_header_t*)((uintptr_t)frag->base.super.ptr +
            sizeof(mca_btl_ud_ib_header_t));
    frag->segment.seg_addr.pval = frag->hdr + 1;

    frag->sg_entry.addr = (uintptr_t)frag->base.super.ptr;
    frag->segment.seg_len = mca_btl_ofud_module.super.btl_eager_limit;
    frag->sg_entry.length = mca_btl_ofud_module.super.btl_eager_limit +
        sizeof(mca_btl_ud_ib_header_t) + sizeof(mca_btl_ud_header_t);

    frag->wr_desc.rd_desc.wr_id = (unsigned long)frag;
    frag->wr_desc.rd_desc.sg_list = &frag->sg_entry;
    frag->wr_desc.rd_desc.num_sge = 1;
    frag->wr_desc.rd_desc.next = NULL;
}


OBJ_CLASS_INSTANCE(mca_btl_ud_frag_t,
                   mca_btl_base_descriptor_t,
                   NULL,
                   NULL);

OBJ_CLASS_INSTANCE(mca_btl_ud_send_frag_t,
                   mca_btl_base_descriptor_t,
                   mca_btl_ud_send_frag_constructor,
                   NULL);

OBJ_CLASS_INSTANCE(mca_btl_ud_user_frag_t,
                   mca_btl_base_descriptor_t,
                   mca_btl_ud_user_frag_constructor,
                   NULL);

OBJ_CLASS_INSTANCE(mca_btl_ud_recv_frag_t,
                   mca_btl_base_descriptor_t,
                   mca_btl_ud_recv_frag_constructor,
                   NULL);