sun4v/hostbridge/hb_sun4v.c

	hb_sun4v.c revision 724365f7556fc4201fdb11766ebc6bd918523130
/*
 * 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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include "hb_sun4.h"
#include "hostbridge.h"
#include "pcibus.h"
#include "util.h"
#include "did.h"

static int
rcs_process(busorrc_t *list, tnode_t *ptn, did_hash_t *didhash,
    di_prom_handle_t promtree, topo_mod_t *mod)
{
    busorrc_t *p;
    int nrc = 0;

    if (list == NULL) {
        topo_mod_dprintf(mod, "No root complexes found.\n");
        return (0);
    }

    /*
     * At press time, all sun4v machines have 1 FIRE ASIC as a
     * hostbridge, and then each PX driver instance we see is a
     * PCI-Express root complex.
     */
    for (p = list; p != NULL; p = p->br_nextbus)
        nrc++;

    topo_mod_dprintf(mod, "root complex count: %d\n", nrc);
    return (declare_exbuses(list, ptn, 1, nrc, didhash, promtree, mod));
}

static int
pci_hostbridges_find(tnode_t *ptn, did_hash_t *didhash,
    di_prom_handle_t promtree, topo_mod_t *mod)
{
    busorrc_t *rcs = NULL;
    di_node_t devtree;
    di_node_t pnode;

    /* Scan for buses, top-level devinfo nodes with the right driver */
    devtree = di_init("/", DINFOCPYALL);
    if (devtree == DI_NODE_NIL) {
        topo_mod_dprintf(mod, "devinfo init failed.");
        topo_node_range_destroy(ptn, HOSTBRIDGE);
        return (0);
    }
    pnode = di_drv_first_node(PX, devtree);
    while (pnode != DI_NODE_NIL) {
        if (busorrc_add(&rcs, pnode, mod) < 0) {
            di_fini(devtree);
            return (-1);
        }
        pnode = di_drv_next_node(pnode);
    }
    rcs_process(rcs, ptn, didhash, promtree, mod);
    busorrc_free(rcs, mod);
    di_fini(devtree);
    return (0);
}

/*ARGSUSED*/
int
platform_hb_enum(tnode_t *parent, const char *name,
    topo_instance_t imin, topo_instance_t imax, did_hash_t *didhash,
    di_prom_handle_t promtree, topo_mod_t *mod)
{
    return (pci_hostbridges_find(parent, didhash, promtree, mod));
}

/*ARGSUSED*/
int
platform_hb_label(tnode_t *node, nvlist_t *in, nvlist_t **out, topo_mod_t *mod)
{
    return (labelmethod_inherit(mod, node, in, out));
}