sys/external/bsd/drm/dist/tests/drmtest.c

   1 /*
   2  * Copyright © 2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include <fcntl.h>
  29 #include <fnmatch.h>
  30 #include <sys/stat.h>
  31 #include "drmtest.h"
  32
  33 #define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
  34 #include <libudev.h>
  35
  36 static int is_master(int fd)
  37 {
  38         drm_client_t client;
  39         int ret;
  40
  41         /* Check that we're the only opener and authed. */
  42         client.idx = 0;
  43         ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
  44         assert (ret == 0);
  45         if (!client.auth)
  46                 return 0;
  47         client.idx = 1;
  48         ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
  49         if (ret != -1 || errno != EINVAL)
  50                 return 0;
  51
  52         return 1;
  53 }
  54
  55 /** Open the first DRM device matching the criteria */
  56 int drm_open_matching(const char *pci_glob, int flags)
  57 {
  58         struct udev *udev;
  59         struct udev_enumerate *e;
  60         struct udev_device *device, *parent;
  61         struct udev_list_entry *entry;
  62         const char *pci_id, *path;
  63         int i, fd;
  64
  65         udev = udev_new();
  66         if (udev == NULL) {
  67                 fprintf(stderr, "failed to initialize udev context\n");
  68                 abort();
  69         }
  70
  71         fd = -1;
  72         e = udev_enumerate_new(udev);
  73         udev_enumerate_add_match_subsystem(e, "drm");
  74         udev_enumerate_scan_devices(e);
  75         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
  76                 path = udev_list_entry_get_name(entry);
  77                 device = udev_device_new_from_syspath(udev, path);
  78                 parent = udev_device_get_parent(device);
  79                 /* Filter out KMS output devices. */
  80                 if (strcmp(udev_device_get_subsystem(parent), "pci") != 0)
  81                         continue;
  82                 pci_id = udev_device_get_property_value(parent, "PCI_ID");
  83                 if (fnmatch(pci_glob, pci_id, 0) != 0)
  84                         continue;
  85                 fd = open(udev_device_get_devnode(device), O_RDWR);
  86                 if (fd < 0)
  87                         continue;
  88                 if ((flags & DRM_TEST_MASTER) && !is_master(fd)) {
  89                         close(fd);
  90                         fd = -1;
  91                         continue;
  92                 }
  93
  94                 break;
  95         }
  96         udev_enumerate_unref(e);
  97         udev_unref(udev);
  98
  99         return fd;
 100 }
 101
 102 int drm_open_any(void)
 103 {
 104         int fd = drm_open_matching("*:*", 0);
 105
 106         if (fd < 0) {
 107                 fprintf(stderr, "failed to open any drm device\n");
 108                 abort();
 109         }
 110
 111         return fd;
 112 }
 113
 114 /**
 115  * Open the first DRM device we can find where we end up being the master.
 116  */
 117 int drm_open_any_master(void)
 118 {
 119         int fd = drm_open_matching("*:*", DRM_TEST_MASTER);
 120
 121         if (fd < 0) {
 122                 fprintf(stderr, "failed to open any drm device\n");
 123                 abort();
 124         }
 125
 126         return fd;
 127
 128 }