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102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*-
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* Copyright (c) 2006 Kip Macy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/endian.h>
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#include <sys/systm.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <machine/mdesc_bus.h>
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#include <machine/cddl/mdesc.h>
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int
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md_vdev_find_node(device_t dev, mde_cookie_t *valp)
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{
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uint64_t cfg_handle;
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mde_cookie_t rootnode, node, *listp = NULL;
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int i, listsz, num_nodes, num_devices, error;
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md_t *mdp;
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cfg_handle = mdesc_bus_get_handle(dev);
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error = EINVAL;
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if ((mdp = md_get()) == NULL)
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return (ENXIO);
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num_nodes = md_node_count(mdp);
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listsz = num_nodes * sizeof(mde_cookie_t);
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listp = (mde_cookie_t *)malloc(listsz, M_DEVBUF, M_WAITOK);
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rootnode = md_root_node(mdp);
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node = error = 0;
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num_devices = md_scan_dag(mdp, rootnode,
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md_find_name(mdp, "virtual-device"),
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md_find_name(mdp, "fwd"), listp);
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if (num_devices == 0) {
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error = ENOENT;
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goto done;
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}
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for (i = 0; i < num_devices; i++) {
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uint64_t thandle;
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node = listp[i];
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md_get_prop_val(mdp, node, "cfg-handle", &thandle);
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if (thandle == cfg_handle) {
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*valp = node;
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break;
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}
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}
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done:
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md_put(mdp);
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return (error);
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}
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