src/tbm_drm_helper_server.c

   1 /**************************************************************************
   2
   3 libtbm
   4
   5 Copyright 2012 Samsung Electronics co., Ltd. All Rights Reserved.
   6
   7 Contact: SooChan Lim <sc1.lim@samsung.com>, Sangjin Lee <lsj119@samsung.com>
   8 Boram Park <boram1288.park@samsung.com>, Changyeon Lee <cyeon.lee@samsung.com>
   9
  10 Permission is hereby granted, free of charge, to any person obtaining a
  11 copy of this software and associated documentation files (the
  12 "Software"), to deal in the Software without restriction, including
  13 without limitation the rights to use, copy, modify, merge, publish,
  14 distribute, sub license, and/or sell copies of the Software, and to
  15 permit persons to whom the Software is furnished to do so, subject to
  16 the following conditions:
  17
  18 The above copyright notice and this permission notice (including the
  19 next paragraph) shall be included in all copies or substantial portions
  20 of the Software.
  21
  22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  23 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  25 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  27 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  28 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29
  30 **************************************************************************/
  31
  32 #define WL_HIDE_DEPRECATED
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <stddef.h>
  38 #include <unistd.h>
  39 #include <fcntl.h>
  40 #include <errno.h>
  41
  42 #include <xf86drm.h>
  43
  44 #include "tbm_bufmgr_int.h"
  45
  46 #include "wayland-tbm-drm-auth-server-protocol.h"
  47
  48 struct wayland_tbm_drm_auth_server {
  49         struct wl_display *display;
  50         struct wl_global *wl_tbm_drm_auth_global;
  51
  52         char *device_name;
  53         uint32_t fd;
  54         uint32_t flags;
  55 };
  56
  57 #define MIN(x,y) (((x)<(y))?(x):(y))
  58
  59 struct wayland_tbm_drm_auth_server *tbm_drm_auth_srv;
  60
  61 static void
  62 _send_server_auth_info(struct wayland_tbm_drm_auth_server *tbm_drm_auth_srv,
  63                        struct wl_resource *resource)
  64 {
  65         int fd = -1;
  66         uint32_t capabilities;
  67         char *device_name = NULL;
  68         drm_magic_t magic = 0;
  69
  70         fd = open(tbm_drm_auth_srv->device_name, O_RDWR | O_CLOEXEC);
  71         if (fd == -1 && errno == EINVAL) {
  72                 fd = open(tbm_drm_auth_srv->device_name, O_RDWR);
  73                 if (fd != -1)
  74                         fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
  75         }
  76
  77         if (fd < 0) {
  78                 TBM_LOG("failed to open drm : device_name, %s\n", tbm_drm_auth_srv->device_name);
  79
  80                 wl_resource_post_error(resource, WL_TBM_DRM_AUTH_ERROR_AUTHENTICATE_FAIL,
  81                                        "authenicate failed::open_drm");
  82                 goto fini;
  83         }
  84
  85         if (drmGetMagic(fd, &magic) < 0) {
  86                 if (errno != EACCES) {
  87                         TBM_LOG("failed to get magic\n");
  88
  89                         wl_resource_post_error(resource, WL_TBM_DRM_AUTH_ERROR_AUTHENTICATE_FAIL,
  90                                                "authenicate failed::get_magic");
  91                         goto fini;
  92                 }
  93         }
  94
  95         if (drmAuthMagic(tbm_drm_auth_srv->fd, magic) < 0) {
  96                 TBM_LOG("failed to authenticate magic\n");
  97
  98                 wl_resource_post_error(resource, WL_TBM_DRM_AUTH_ERROR_AUTHENTICATE_FAIL,
  99                                        "authenicate failed::auth_magic");
 100                 goto fini;
 101         }
 102
 103         capabilities = tbm_drm_auth_srv->flags;
 104         device_name = tbm_drm_auth_srv->device_name;
 105
 106         /* send */
 107         wl_tbm_drm_auth_send_authentication_info(resource, device_name, capabilities, fd);
 108
 109 fini:
 110         if (fd >= 0)
 111                 close(fd);
 112
 113         if (device_name && device_name != tbm_drm_auth_srv->device_name)
 114                 free(device_name);
 115
 116 }
 117
 118 static void
 119 _wayland_tbm_drm_auth_server_impl_get_authentication_info(struct wl_client *client,
 120                 struct wl_resource *resource)
 121 {
 122         struct wayland_tbm_drm_auth_server *tbm_drm_auth_srv = wl_resource_get_user_data(resource);
 123
 124         /* if display server is the client of the host display server, for embedded server */
 125         _send_server_auth_info(tbm_drm_auth_srv, resource);
 126 }
 127
 128
 129 static const struct wl_tbm_drm_auth_interface _wayland_tbm_drm_auth_server_implementation = {
 130         _wayland_tbm_drm_auth_server_impl_get_authentication_info,
 131 };
 132
 133 static void
 134 _wayland_tbm_drm_auth_server_bind_cb(struct wl_client *client, void *data,
 135                             uint32_t version,
 136                             uint32_t id)
 137 {
 138         struct wl_resource *resource;
 139
 140         resource = wl_resource_create(client, &wl_tbm_drm_auth_interface, MIN(version, 1), id);
 141         if (!resource) {
 142                 wl_client_post_no_memory(client);
 143                 return;
 144         }
 145
 146         wl_resource_set_implementation(resource,
 147                                        &_wayland_tbm_drm_auth_server_implementation,
 148                                        data,
 149                                        NULL);
 150 }
 151
 152 int
 153 tbm_drm_helper_wl_auth_server_init(void *wl_display,   int fd, const char *device_name, uint32_t flags)
 154 {
 155         if (!tbm_drm_auth_srv) {
 156                 TBM_RETURN_VAL_IF_FAIL(wl_display != NULL, 0);
 157
 158                 tbm_drm_auth_srv = calloc(1, sizeof(struct wayland_tbm_drm_auth_server));
 159                 TBM_RETURN_VAL_IF_FAIL(tbm_drm_auth_srv != NULL, 0);
 160
 161                 tbm_drm_auth_srv->display = (struct wl_display *)wl_display;
 162                 tbm_drm_auth_srv->device_name = strdup(device_name);
 163                 tbm_drm_auth_srv->fd = fd;
 164                 tbm_drm_auth_srv->flags = flags;
 165
 166                 if(wl_display_add_socket(tbm_drm_auth_srv->display, "tbm-drm-auth")) {
 167                         TBM_LOG("[TBM_DRM] fail to add socket\n");
 168
 169                         if (tbm_drm_auth_srv->device_name)
 170                                 free(tbm_drm_auth_srv->device_name);
 171
 172                         free(tbm_drm_auth_srv);
 173                         tbm_drm_auth_srv = NULL;
 174
 175                         return 0;
 176                 }
 177
 178                 /* init the client resource list */
 179                 tbm_drm_auth_srv->wl_tbm_drm_auth_global = wl_global_create(tbm_drm_auth_srv->display, &wl_tbm_drm_auth_interface, 1,
 180                                          tbm_drm_auth_srv, _wayland_tbm_drm_auth_server_bind_cb);
 181         }
 182
 183         return 1;
 184 }
 185
 186 void
 187 tbm_drm_helper_wl_auth_server_deinit(void)
 188 {
 189         if (tbm_drm_auth_srv) {
 190                 wl_global_destroy(tbm_drm_auth_srv->wl_tbm_drm_auth_global);
 191
 192                 if (tbm_drm_auth_srv->device_name)
 193                         free(tbm_drm_auth_srv->device_name);
 194
 195                 free(tbm_drm_auth_srv);
 196                 tbm_drm_auth_srv = NULL;
 197         }
 198 }
 199
 200 int
 201 tbm_drm_helper_get_master_fd(void)
 202 {
 203     const char *value;
 204     int ret, fd = -1;
 205
 206     value = (const char*)getenv("TIZEN_DRM_MASTER_FD");
 207     if (!value)
 208         return -1;
 209
 210     ret = sscanf(value, "%d", &fd);
 211     if (ret <= 0)
 212         return -1;
 213
 214     TBM_LOG("TIZEN_DRM_MASTER_FD: %d", fd);
 215
 216     return fd;
 217 }
 218
 219 void
 220 tbm_drm_helper_set_master_fd(int fd)
 221 {
 222     char buf[32];
 223     int ret;
 224
 225     snprintf(buf, sizeof(buf), "%d", fd);
 226
 227     ret = setenv("TIZEN_DRM_MASTER_FD", (const char*)buf, 1);
 228     if (ret)
 229     {
 230         TBM_LOG("failed to set TIZEN_DRM_MASTER_FD to %d", fd);
 231         return;
 232     }
 233
 234     TBM_LOG("TIZEN_DRM_MASTER_FD: %d", fd);
 235 }