/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <fcntl.h>
#include <libdevinfo.h>
#include <stdlib.h>
#include <sys/sunddi.h>
#include <sys/types.h>
#include <sys/scsi/conf/autoconf.h>

#include "libdiskmgt.h"
#include "disks_private.h"

static descriptor_t     **get_assoc_buses(descriptor_t *desc, int *errp);
static descriptor_t     **get_assoc_controllers(descriptor_t *desc, int *errp);

descriptor_t **
bus_get_assoc_descriptors(descriptor_t *desc, dm_desc_type_t type, int *errp)
{
        switch (type) {
        case DM_BUS:
            return (get_assoc_buses(desc, errp));
        case DM_CONTROLLER:
            return (get_assoc_controllers(desc, errp));
        }

        *errp = EINVAL;
        return (NULL);
}

nvlist_t *
bus_get_attributes(descriptor_t *dp, int *errp)
{
        bus_t           *bp;
        nvlist_t        *attrs;

        if (nvlist_alloc(&attrs, NVATTRS, 0) != 0) {
            *errp = ENOMEM;
            return (NULL);
        }

        bp = dp->p.bus;

        if (nvlist_add_string(attrs, DM_BTYPE, bp->btype) != 0) {
            nvlist_free(attrs);
            *errp = ENOMEM;
            return (NULL);
        }

        if (bp->freq != 0) {
            if (nvlist_add_uint32(attrs, DM_CLOCK, bp->freq) != 0) {
                nvlist_free(attrs);
                *errp = ENOMEM;
                return (NULL);
            }
        }

        if (bp->pname != NULL) {
            if (nvlist_add_string(attrs, DM_PNAME, bp->pname) != 0) {
                nvlist_free(attrs);
                *errp = ENOMEM;
                return (NULL);
            }
        }

        *errp = 0;
        return (attrs);
}

descriptor_t *
bus_get_descriptor_by_name(char *name, int *errp)
{
        descriptor_t    **buses;
        int             i;
        descriptor_t    *bus = NULL;

        buses = cache_get_descriptors(DM_BUS, errp);
        if (*errp != 0) {
            return (NULL);
        }

        for (i = 0; buses[i]; i++) {
            if (libdiskmgt_str_eq(name, buses[i]->p.bus->name)) {
                bus = buses[i];
            } else {
                /* clean up the unused descriptors */
                cache_free_descriptor(buses[i]);
            }
        }
        free(buses);

        if (bus == NULL) {
            *errp = ENODEV;
        }

        return (bus);
}

/* ARGSUSED */
descriptor_t **
bus_get_descriptors(int filter[], int *errp)
{
        return (cache_get_descriptors(DM_BUS, errp));
}

char *
bus_get_name(descriptor_t *desc)
{
        return (desc->p.bus->name);
}

/* ARGSUSED */
nvlist_t *
bus_get_stats(descriptor_t *dp, int stat_type, int *errp)
{
        /* There are no stat types defined for controllers */
        *errp = EINVAL;
        return (NULL);
}

int
bus_make_descriptors()
{
        int     error;
        bus_t   *bp;

        bp = cache_get_buslist();
        while (bp != NULL) {
            cache_load_desc(DM_BUS, bp, NULL, NULL, &error);
            if (error != 0) {
                return (error);
            }
            bp = bp->next;
        }

        return (0);
}

static descriptor_t **
get_assoc_buses(descriptor_t *desc, int *errp)
{
        bus_t           *bp;
        char            *name;
        descriptor_t    **allbuses;
        descriptor_t    **buses;
        int             cnt;
        int             i;
        int             pos;

        bp = desc->p.bus;
        name = bp->name;

        allbuses = cache_get_descriptors(DM_BUS, errp);
        if (*errp != 0) {
            return (NULL);
        }

        /* Count how many we have (we overcount, but thats ok). */
        for (cnt = 0; allbuses[cnt]; cnt++);

        /* make the snapshot */
        buses = (descriptor_t **)calloc(cnt + 1, sizeof (descriptor_t *));
        if (buses == NULL) {
            *errp = ENOMEM;
            cache_free_descriptors(allbuses);
            return (NULL);
        }

        /*
         * Get this buses parent bus and get the buses that I am the parent of.
         */
        pos = 0;
        for (i = 0; allbuses[i]; i++) {
            if (libdiskmgt_str_eq(name, allbuses[i]->p.bus->pname)) {
                buses[pos++] = allbuses[i];
            } else if (bp->pname != NULL &&
                libdiskmgt_str_eq(bp->pname, allbuses[i]->p.bus->name)) {

                buses[pos++] = allbuses[i];
            } else {
                /* clean up the unused descriptor */
                cache_free_descriptor(allbuses[i]);
            }
        }
        buses[pos] = NULL;

        free(allbuses);

        *errp = 0;
        return (buses);
}

static descriptor_t **
get_assoc_controllers(descriptor_t *desc, int *errp)
{
        bus_t           *bp;
        descriptor_t    **controllers;
        int             cnt;
        int             i;

        bp = desc->p.bus;

        /* Count how many we have. */
        for (cnt = 0; bp->controllers[cnt]; cnt++);

        /* make the snapshot */
        controllers = (descriptor_t **)calloc(cnt + 1, sizeof (descriptor_t *));
        if (controllers == NULL) {
            *errp = ENOMEM;
            return (NULL);
        }

        for (i = 0; bp->controllers[i]; i++) {
            controllers[i] = cache_get_desc(DM_CONTROLLER, bp->controllers[i],
                NULL, NULL, errp);
            if (*errp != 0) {
                cache_free_descriptors(controllers);
                return (NULL);
            }
        }
        controllers[i] = NULL;

        *errp = 0;
        return (controllers);
}