/*
 * 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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <errno.h>
#include <malloc.h>
#include <mdesc.h>
#include <pri.h>
#include "priplugin.h"

static void pri_free(void *bufp, size_t size);
static uint64_t *md_bufp = NULL;
static uint64_t *new_md_bufp;

int
pri_devinit(uint64_t *tok)
{
        int status;

        new_md_bufp = NULL;
        status = 0;
        if (pri_get(PRI_WAITGET, tok, &new_md_bufp, malloc, pri_free) ==
            (ssize_t)-1) {
                pri_debug(LOG_NOTICE, "pri_devinit: can'r read from "
                    "the PRI: %d\n", errno);
                status = -1;
        }
        if (new_md_bufp == NULL) {
                pri_debug(LOG_NOTICE, "pri_devinit: pri_get returned "
                    "NULL buffer!\n");
                status = -1;
        }
        return (status);
}

md_t *
pri_bufinit(md_t *mdp)
{

        if (mdp)
                md_fini(mdp);
        if (md_bufp)
                free(md_bufp);
        md_bufp = new_md_bufp;

        pri_debug(LOG_NOTICE, "pri_bufinit: done reading PRI\n");

        /*
         * The PRI and the MD use the same data format so they can be
         * parsed by the same functions.
         */
        if (md_bufp) {
                mdp = md_init_intern(md_bufp, malloc, pri_free);
                if (mdp == NULL) {
                        pri_debug(LOG_NOTICE, "pri_bufinit: md_init_intern "
                        "failed\n");
                        free(md_bufp);
                        md_bufp = NULL;
                } else {
                        pri_debug(LOG_NOTICE, "pri_bufinit: mdi_init_intern "
                            "completed successfully\n");
                }
        } else
                mdp = NULL;

        pri_debug(LOG_NOTICE, "pri_bufinit: returning\n");

        return (mdp);
}

/*ARGSUSED*/
static void
pri_free(void *bufp, size_t size)
{
        if (bufp)
                free(bufp);
}

void
pri_devfini(md_t *mdp)
{
        if (mdp)
                (void) md_fini(mdp);

        if (md_bufp)
                free(md_bufp);
        md_bufp = NULL;
}