mdesc_vdevfindval.c

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    1 /*-
    2  * Copyright (c) 2006 Kip Macy
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/endian.h>
   33 #include <sys/systm.h>
   34 #include <sys/sockio.h>
   35 #include <sys/mbuf.h>
   36 #include <sys/malloc.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/socket.h>
   40 #include <sys/lock.h>
   41 #include <sys/mutex.h>
   42 #include <sys/taskqueue.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/resource.h>
   46 #include <sys/bus.h>
   47 #include <sys/rman.h>
   48 
   49 #include <sys/types.h>
   50 #include <sys/param.h>
   51 #include <machine/mdesc_bus.h>
   52 #include <machine/cddl/mdesc.h>
   53 
   54 
   55 int
   56 md_vdev_find_val(device_t dev, char *namep, uint64_t *valp)
   57 {
   58         uint64_t              cfg_handle;
   59         mde_cookie_t          rootnode, node, *listp = NULL;
   60         int                   i, listsz, num_nodes, num_devices, error;
   61         md_t                 *mdp;
   62 
   63         cfg_handle = mdesc_bus_get_handle(dev);
   64 
   65         if ((mdp = md_get()) == NULL) 
   66                 return (ENXIO);
   67 
   68         num_nodes = md_node_count(mdp);
   69         listsz = num_nodes * sizeof(mde_cookie_t);
   70         listp = (mde_cookie_t *)malloc(listsz, M_DEVBUF, M_WAITOK);
   71         rootnode = md_root_node(mdp);
   72         node = error = 0;
   73 
   74         num_devices = md_scan_dag(mdp, rootnode, 
   75                                   md_find_name(mdp, "virtual-device"),
   76                                   md_find_name(mdp, "fwd"), listp);
   77         
   78         if (num_devices == 0) {
   79                 error = ENOENT;
   80                 goto done;
   81         }
   82                 
   83         for (i = 0; i < num_devices; i++) {
   84                 uint64_t thandle;
   85 
   86                 node = listp[i];
   87                 md_get_prop_val(mdp, node, "cfg-handle", &thandle);
   88                 if (thandle == cfg_handle) 
   89                         break;
   90         }
   91 
   92         md_get_prop_val(mdp, node, namep, valp);
   93 done:
   94         free(listp, M_DEVBUF);
   95         md_put(mdp);
   96 
   97         return (error);
   98 }
   99

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FreeBSD/Linux Kernel Cross Reference sys/sun4v/mdesc/mdesc_vdevfindval.c

FreeBSD/Linux Kernel Cross Reference
sys/sun4v/mdesc/mdesc_vdevfindval.c