diff options
Diffstat (limited to 'sys/sun4v/mdesc/mdesc_vdevfindval.c')
-rw-r--r-- | sys/sun4v/mdesc/mdesc_vdevfindval.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sys/sun4v/mdesc/mdesc_vdevfindval.c b/sys/sun4v/mdesc/mdesc_vdevfindval.c new file mode 100644 index 000000000000..8216996a1078 --- /dev/null +++ b/sys/sun4v/mdesc/mdesc_vdevfindval.c @@ -0,0 +1,98 @@ +/*- + * Copyright (c) 2006 Kip Macy + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/endian.h> +#include <sys/systm.h> +#include <sys/sockio.h> +#include <sys/mbuf.h> +#include <sys/malloc.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/socket.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/taskqueue.h> + +#include <machine/bus.h> +#include <machine/resource.h> +#include <sys/bus.h> +#include <sys/rman.h> + +#include <sys/types.h> +#include <sys/param.h> +#include <machine/mdesc_bus.h> +#include <machine/cddl/mdesc.h> + + +int +md_vdev_find_val(device_t dev, char *namep, uint64_t *valp) +{ + uint64_t cfg_handle; + mde_cookie_t rootnode, node, *listp = NULL; + int i, listsz, num_nodes, num_devices, error; + md_t *mdp; + + cfg_handle = mdesc_bus_get_handle(dev); + + if ((mdp = md_get()) == NULL) + return (ENXIO); + + num_nodes = md_node_count(mdp); + listsz = num_nodes * sizeof(mde_cookie_t); + listp = (mde_cookie_t *)malloc(listsz, M_DEVBUF, M_WAITOK); + rootnode = md_root_node(mdp); + node = error = 0; + + num_devices = md_scan_dag(mdp, rootnode, + md_find_name(mdp, "virtual-device"), + md_find_name(mdp, "fwd"), listp); + + if (num_devices == 0) { + error = ENOENT; + goto done; + } + + for (i = 0; i < num_devices; i++) { + uint64_t thandle; + + node = listp[i]; + md_get_prop_val(mdp, node, "cfg-handle", &thandle); + if (thandle == cfg_handle) + break; + } + + md_get_prop_val(mdp, node, namep, valp); +done: + md_put(mdp); + + return (error); +} + |