native_drm.c revision 992680c8b46d72cbc61888b8439d815bff42986c
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.8
4 *
5 * Copyright (C) 2010 Chia-I Wu <olv@0xlab.org>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 */
25
26#include <string.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <fcntl.h>
30
31#include "util/u_memory.h"
32#include "egllog.h"
33
34#include "native_drm.h"
35
36#include "gbm_gallium_drmint.h"
37
38#ifdef HAVE_LIBUDEV
39#include <libudev.h>
40#endif
41
42static boolean
43drm_display_is_format_supported(struct native_display *ndpy,
44                                enum pipe_format fmt, boolean is_color)
45{
46   return ndpy->screen->is_format_supported(ndpy->screen,
47         fmt, PIPE_TEXTURE_2D, 0,
48         (is_color) ? PIPE_BIND_RENDER_TARGET :
49         PIPE_BIND_DEPTH_STENCIL);
50}
51
52static const struct native_config **
53drm_display_get_configs(struct native_display *ndpy, int *num_configs)
54{
55   struct drm_display *drmdpy = drm_display(ndpy);
56   const struct native_config **configs;
57
58   /* first time */
59   if (!drmdpy->config) {
60      struct native_config *nconf;
61      enum pipe_format format;
62
63      drmdpy->config = CALLOC(1, sizeof(*drmdpy->config));
64      if (!drmdpy->config)
65         return NULL;
66
67      nconf = &drmdpy->config->base;
68
69      nconf->buffer_mask =
70         (1 << NATIVE_ATTACHMENT_FRONT_LEFT) |
71         (1 << NATIVE_ATTACHMENT_BACK_LEFT);
72
73      format = PIPE_FORMAT_B8G8R8A8_UNORM;
74      if (!drm_display_is_format_supported(&drmdpy->base, format, TRUE)) {
75         format = PIPE_FORMAT_A8R8G8B8_UNORM;
76         if (!drm_display_is_format_supported(&drmdpy->base, format, TRUE))
77            format = PIPE_FORMAT_NONE;
78      }
79      if (format == PIPE_FORMAT_NONE) {
80         FREE(drmdpy->config);
81         drmdpy->config = NULL;
82         return NULL;
83      }
84
85      nconf->color_format = format;
86
87      /* support KMS */
88      if (drmdpy->resources)
89         nconf->scanout_bit = TRUE;
90   }
91
92   configs = MALLOC(sizeof(*configs));
93   if (configs) {
94      configs[0] = &drmdpy->config->base;
95      if (num_configs)
96         *num_configs = 1;
97   }
98
99   return configs;
100}
101
102static int
103drm_display_get_param(struct native_display *ndpy,
104                      enum native_param_type param)
105{
106   int val;
107
108   switch (param) {
109   case NATIVE_PARAM_USE_NATIVE_BUFFER:
110   case NATIVE_PARAM_PRESERVE_BUFFER:
111   case NATIVE_PARAM_MAX_SWAP_INTERVAL:
112   default:
113      val = 0;
114      break;
115   }
116
117   return val;
118}
119
120static void
121drm_display_destroy(struct native_display *ndpy)
122{
123   struct drm_display *drmdpy = drm_display(ndpy);
124
125   if (drmdpy->config)
126      FREE(drmdpy->config);
127
128   drm_display_fini_modeset(&drmdpy->base);
129
130   /* gbm owns screen */
131   ndpy->screen = NULL;
132   ndpy_uninit(ndpy);
133
134   if (drmdpy->device_name)
135      FREE(drmdpy->device_name);
136
137   if (drmdpy->fd >= 0)
138      close(drmdpy->fd);
139
140   FREE(drmdpy);
141}
142
143static struct native_display_buffer drm_display_buffer = {
144   /* use the helpers */
145   drm_display_import_native_buffer,
146   drm_display_export_native_buffer
147};
148
149static int
150drm_display_authenticate(void *user_data, uint32_t magic)
151{
152   struct native_display *ndpy = user_data;
153   struct drm_display *drmdpy = drm_display(ndpy);
154
155   return drmAuthMagic(drmdpy->fd, magic);
156}
157
158static char *
159drm_get_device_name(int fd)
160{
161   char *device_name = NULL;
162#ifdef HAVE_LIBUDEV
163   struct udev *udev;
164   struct udev_device *device;
165   struct stat buf;
166   const char *tmp;
167
168   udev = udev_new();
169   if (fstat(fd, &buf) < 0) {
170      _eglLog(_EGL_WARNING, "failed to stat fd %d", fd);
171      goto out;
172   }
173
174   device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
175   if (device == NULL) {
176      _eglLog(_EGL_WARNING,
177              "could not create udev device for fd %d", fd);
178      goto out;
179   }
180
181   tmp = udev_device_get_devnode(device);
182   if (!tmp)
183      goto out;
184   device_name = strdup(tmp);
185
186out:
187   udev_device_unref(device);
188   udev_unref(udev);
189
190#endif
191   return device_name;
192}
193
194#ifdef HAVE_WAYLAND_BACKEND
195
196static struct wayland_drm_callbacks wl_drm_callbacks = {
197   drm_display_authenticate,
198   egl_g3d_wl_drm_helper_reference_buffer,
199   egl_g3d_wl_drm_helper_unreference_buffer
200};
201
202static boolean
203drm_display_bind_wayland_display(struct native_display *ndpy,
204                                  struct wl_display *wl_dpy)
205{
206   struct drm_display *drmdpy = drm_display(ndpy);
207
208   if (drmdpy->wl_server_drm)
209      return FALSE;
210
211   drmdpy->wl_server_drm = wayland_drm_init(wl_dpy,
212         drmdpy->device_name,
213         &wl_drm_callbacks, ndpy);
214
215   if (!drmdpy->wl_server_drm)
216      return FALSE;
217
218   return TRUE;
219}
220
221static boolean
222drm_display_unbind_wayland_display(struct native_display *ndpy,
223                                    struct wl_display *wl_dpy)
224{
225   struct drm_display *drmdpy = drm_display(ndpy);
226
227   if (!drmdpy->wl_server_drm)
228      return FALSE;
229
230   wayland_drm_uninit(drmdpy->wl_server_drm);
231   drmdpy->wl_server_drm = NULL;
232
233   return TRUE;
234}
235
236static struct native_display_wayland_bufmgr drm_display_wayland_bufmgr = {
237   drm_display_bind_wayland_display,
238   drm_display_unbind_wayland_display,
239   egl_g3d_wl_drm_common_wl_buffer_get_resource
240};
241
242#endif /* HAVE_WAYLAND_BACKEND */
243
244static struct native_surface *
245drm_create_pixmap_surface(struct native_display *ndpy,
246                              EGLNativePixmapType pix,
247                              const struct native_config *nconf)
248{
249   struct gbm_gallium_drm_bo *bo = (void *) pix;
250
251   return drm_display_create_surface_from_resource(ndpy, bo->resource);
252}
253
254static boolean
255drm_display_init_screen(struct native_display *ndpy)
256{
257   return TRUE;
258}
259
260static struct native_display *
261drm_create_display(struct gbm_gallium_drm_device *gbmdrm,
262                   const struct native_event_handler *event_handler)
263{
264   struct drm_display *drmdpy;
265
266   drmdpy = CALLOC_STRUCT(drm_display);
267   if (!drmdpy)
268      return NULL;
269
270   drmdpy->fd = gbmdrm->base.base.fd;
271   drmdpy->device_name = drm_get_device_name(drmdpy->fd);
272
273   gbmdrm->lookup_egl_image = (struct pipe_resource *(*)(void *, void *))
274      event_handler->lookup_egl_image;
275   gbmdrm->lookup_egl_image_data = &drmdpy->base;
276
277   drmdpy->event_handler = event_handler;
278
279   drmdpy->base.screen = gbmdrm->screen;
280
281   drmdpy->base.init_screen = drm_display_init_screen;
282   drmdpy->base.destroy = drm_display_destroy;
283   drmdpy->base.get_param = drm_display_get_param;
284   drmdpy->base.get_configs = drm_display_get_configs;
285
286   drmdpy->base.create_pixmap_surface = drm_create_pixmap_surface;
287
288   drmdpy->base.buffer = &drm_display_buffer;
289#ifdef HAVE_WAYLAND_BACKEND
290   if (drmdpy->device_name)
291      drmdpy->base.wayland_bufmgr = &drm_display_wayland_bufmgr;
292#endif
293   drm_display_init_modeset(&drmdpy->base);
294
295   return &drmdpy->base;
296}
297
298static const struct native_event_handler *drm_event_handler;
299
300static struct native_display *
301native_create_display(void *dpy, boolean use_sw)
302{
303   struct gbm_gallium_drm_device *gbm;
304   int fd;
305
306   gbm = dpy;
307
308   if (gbm == NULL) {
309      fd = open("/dev/dri/card0", O_RDWR);
310      gbm = gbm_gallium_drm_device(gbm_create_device(fd));
311   }
312
313   if (gbm == NULL)
314      return NULL;
315
316   if (strcmp(gbm_device_get_backend_name(&gbm->base.base), "drm") != 0 ||
317       gbm->base.type != GBM_DRM_DRIVER_TYPE_GALLIUM)
318      return NULL;
319
320   return drm_create_display(gbm, drm_event_handler);
321}
322
323static const struct native_platform drm_platform = {
324   "DRM", /* name */
325   native_create_display
326};
327
328const struct native_platform *
329native_get_drm_platform(const struct native_event_handler *event_handler)
330{
331   drm_event_handler = event_handler;
332   return &drm_platform;
333}
334