native_drm.c revision b60120608f6ddf4098bc324363197c979ee04cb7 
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->own_gbm) {
138      gbm_device_destroy(&drmdpy->gbmdrm->base.base);
139      if (drmdpy->fd >= 0)
140         close(drmdpy->fd);
141   }
142
143   FREE(drmdpy);
144}
145
146static struct native_display_buffer drm_display_buffer = {
147   /* use the helpers */
148   drm_display_import_native_buffer,
149   drm_display_export_native_buffer
150};
151
152static char *
153drm_get_device_name(int fd)
154{
155   char *device_name = NULL;
156#ifdef HAVE_LIBUDEV
157   struct udev *udev;
158   struct udev_device *device;
159   struct stat buf;
160   const char *tmp;
161
162   udev = udev_new();
163   if (fstat(fd, &buf) < 0) {
164      _eglLog(_EGL_WARNING, "failed to stat fd %d", fd);
165      goto out;
166   }
167
168   device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
169   if (device == NULL) {
170      _eglLog(_EGL_WARNING,
171              "could not create udev device for fd %d", fd);
172      goto out;
173   }
174
175   tmp = udev_device_get_devnode(device);
176   if (!tmp)
177      goto out;
178   device_name = strdup(tmp);
179
180out:
181   udev_device_unref(device);
182   udev_unref(udev);
183
184#endif
185   return device_name;
186}
187
188#ifdef HAVE_WAYLAND_BACKEND
189
190static int
191drm_display_authenticate(void *user_data, uint32_t magic)
192{
193   struct native_display *ndpy = user_data;
194   struct drm_display *drmdpy = drm_display(ndpy);
195
196   return drmAuthMagic(drmdpy->fd, magic);
197}
198
199static struct wayland_drm_callbacks wl_drm_callbacks = {
200   drm_display_authenticate,
201   egl_g3d_wl_drm_helper_reference_buffer,
202   egl_g3d_wl_drm_helper_unreference_buffer
203};
204
205static boolean
206drm_display_bind_wayland_display(struct native_display *ndpy,
207                                  struct wl_display *wl_dpy)
208{
209   struct drm_display *drmdpy = drm_display(ndpy);
210
211   if (drmdpy->wl_server_drm)
212      return FALSE;
213
214   drmdpy->wl_server_drm = wayland_drm_init(wl_dpy,
215         drmdpy->device_name,
216         &wl_drm_callbacks, ndpy);
217
218   if (!drmdpy->wl_server_drm)
219      return FALSE;
220
221   return TRUE;
222}
223
224static boolean
225drm_display_unbind_wayland_display(struct native_display *ndpy,
226                                    struct wl_display *wl_dpy)
227{
228   struct drm_display *drmdpy = drm_display(ndpy);
229
230   if (!drmdpy->wl_server_drm)
231      return FALSE;
232
233   wayland_drm_uninit(drmdpy->wl_server_drm);
234   drmdpy->wl_server_drm = NULL;
235
236   return TRUE;
237}
238
239static struct native_display_wayland_bufmgr drm_display_wayland_bufmgr = {
240   drm_display_bind_wayland_display,
241   drm_display_unbind_wayland_display,
242   egl_g3d_wl_drm_common_wl_buffer_get_resource
243};
244
245#endif /* HAVE_WAYLAND_BACKEND */
246
247static struct native_surface *
248drm_create_pixmap_surface(struct native_display *ndpy,
249                              EGLNativePixmapType pix,
250                              const struct native_config *nconf)
251{
252   struct gbm_gallium_drm_bo *bo = (void *) pix;
253
254   return drm_display_create_surface_from_resource(ndpy, bo->resource);
255}
256
257static boolean
258drm_display_init_screen(struct native_display *ndpy)
259{
260   return TRUE;
261}
262
263static struct native_display *
264drm_create_display(struct gbm_gallium_drm_device *gbmdrm, int own_gbm,
265                   const struct native_event_handler *event_handler)
266{
267   struct drm_display *drmdpy;
268
269   drmdpy = CALLOC_STRUCT(drm_display);
270   if (!drmdpy)
271      return NULL;
272
273   drmdpy->gbmdrm = gbmdrm;
274   drmdpy->own_gbm = own_gbm;
275   drmdpy->fd = gbmdrm->base.base.fd;
276   drmdpy->device_name = drm_get_device_name(drmdpy->fd);
277
278   gbmdrm->lookup_egl_image = (struct pipe_resource *(*)(void *, void *))
279      event_handler->lookup_egl_image;
280   gbmdrm->lookup_egl_image_data = &drmdpy->base;
281
282   drmdpy->event_handler = event_handler;
283
284   drmdpy->base.screen = gbmdrm->screen;
285
286   drmdpy->base.init_screen = drm_display_init_screen;
287   drmdpy->base.destroy = drm_display_destroy;
288   drmdpy->base.get_param = drm_display_get_param;
289   drmdpy->base.get_configs = drm_display_get_configs;
290
291   drmdpy->base.create_pixmap_surface = drm_create_pixmap_surface;
292
293   drmdpy->base.buffer = &drm_display_buffer;
294#ifdef HAVE_WAYLAND_BACKEND
295   if (drmdpy->device_name)
296      drmdpy->base.wayland_bufmgr = &drm_display_wayland_bufmgr;
297#endif
298   drm_display_init_modeset(&drmdpy->base);
299
300   return &drmdpy->base;
301}
302
303static const struct native_event_handler *drm_event_handler;
304
305static struct native_display *
306native_create_display(void *dpy, boolean use_sw)
307{
308   struct gbm_gallium_drm_device *gbm;
309   int fd;
310   int own_gbm = 0;
311
312   gbm = dpy;
313
314   if (gbm == NULL) {
315      const char *device_name="/dev/dri/card0";
316#ifdef O_CLOEXEC
317      fd = open(device_name, O_RDWR | O_CLOEXEC);
318      if (fd == -1 && errno == EINVAL)
319#endif
320      {
321         fd = open(device_name, O_RDWR);
322         if (fd != -1)
323            fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
324      }
325      /* FIXME: Use an internal constructor to create a gbm
326       * device with gallium backend directly, without setenv */
327      setenv("GBM_BACKEND", "gbm_gallium_drm.so", 1);
328      gbm = gbm_gallium_drm_device(gbm_create_device(fd));
329      own_gbm = 1;
330   }
331
332   if (gbm == NULL)
333      return NULL;
334
335   if (strcmp(gbm_device_get_backend_name(&gbm->base.base), "drm") != 0 ||
336       gbm->base.type != GBM_DRM_DRIVER_TYPE_GALLIUM) {
337      if (own_gbm)
338         gbm_device_destroy(&gbm->base.base);
339      return NULL;
340   }
341
342   return drm_create_display(gbm, own_gbm, drm_event_handler);
343}
344
345static const struct native_platform drm_platform = {
346   "DRM", /* name */
347   native_create_display
348};
349
350const struct native_platform *
351native_get_drm_platform(const struct native_event_handler *event_handler)
352{
353   drm_event_handler = event_handler;
354   return &drm_platform;
355}
356