udapl_tavor/common/dapl_rmr_free.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
 */

/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 *
 * MODULE: dapl_rmr_free.c
 *
 * PURPOSE: Memory management
 * Description: Interfaces in this file are completely described in
 *      the DAPL 1.1 API, Chapter 6, section 6
 *
 */

#include "dapl_rmr_util.h"
#include "dapl_adapter_util.h"
#include "dapl_ia_util.h"

/*
 * dapl_rmr_free
 *
 * DAPL Requirements Version xxx, 6.6.4.2
 *
 * Destroy an instance of the Remote Memory Region
 *
 * Input:
 *  rmr_handle
 *
 * Output:
 *  none
 *
 * Returns:
 *  DAT_SUCCESS
 *  DAT_INVALID_PARAMETER
 */
DAT_RETURN
dapl_rmr_free(IN DAT_RMR_HANDLE rmr_handle)
{
    DAPL_RMR *rmr;
    DAT_RETURN dat_status;

    dat_status = DAT_SUCCESS;

    if (DAPL_BAD_HANDLE(rmr_handle, DAPL_MAGIC_RMR)) {
        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
            DAT_INVALID_HANDLE_RMR);
        goto bail;
    }

    rmr = (DAPL_RMR *)rmr_handle;

    /*
     * If the user did not perform an unbind op, release
     * counts here.
     */
    if (rmr->param.lmr_triplet.virtual_address != 0) {
        (void) dapl_os_atomic_dec(&rmr->lmr->lmr_ref_count);
        rmr->param.lmr_triplet.virtual_address = 0;
    }

    dat_status = dapls_ib_mw_free(rmr);

    if (dat_status != DAT_SUCCESS) {
        goto bail;
    }

    dapl_os_atomic_dec(&rmr->pz->pz_ref_count);

    dapl_rmr_dealloc(rmr);

bail:
    return (dat_status);
}