native_drm.c revision 901a1183274670766df7f3f5c3b0d60b22fee722 
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#include <errno.h>
31
32#include "util/u_memory.h"
33#include "egllog.h"
34
35#include "native_drm.h"
36
37#include "gbm_gallium_drmint.h"
38
39#ifdef HAVE_LIBUDEV
40#include <libudev.h>
41#endif
42
43static boolean
44drm_display_is_format_supported(struct native_display *ndpy,
45                                enum pipe_format fmt, boolean is_color)
46{
47   return ndpy->screen->is_format_supported(ndpy->screen,
48         fmt, PIPE_TEXTURE_2D, 0,
49         (is_color) ? PIPE_BIND_RENDER_TARGET :
50         PIPE_BIND_DEPTH_STENCIL);
51}
52
53static const struct native_config **
54drm_display_get_configs(struct native_display *ndpy, int *num_configs)
55{
56   struct drm_display *drmdpy = drm_display(ndpy);
57   const struct native_config **configs;
58
59   /* first time */
60   if (!drmdpy->config) {
61      struct native_config *nconf;
62      enum pipe_format format;
63
64      drmdpy->config = CALLOC(1, sizeof(*drmdpy->config));
65      if (!drmdpy->config)
66         return NULL;
67
68      nconf = &drmdpy->config->base;
69
70      nconf->buffer_mask =
71         (1 << NATIVE_ATTACHMENT_FRONT_LEFT) |
72         (1 << NATIVE_ATTACHMENT_BACK_LEFT);
73
74      format = PIPE_FORMAT_B8G8R8A8_UNORM;
75      if (!drm_display_is_format_supported(&drmdpy->base, format, TRUE)) {
76         format = PIPE_FORMAT_A8R8G8B8_UNORM;
77         if (!drm_display_is_format_supported(&drmdpy->base, format, TRUE))
78            format = PIPE_FORMAT_NONE;
79      }
80      if (format == PIPE_FORMAT_NONE) {
81         FREE(drmdpy->config);
82         drmdpy->config = NULL;
83         return NULL;
84      }
85
86      nconf->color_format = format;
87
88      /* support KMS */
89      if (drmdpy->resources)
90         nconf->scanout_bit = TRUE;
91   }
92
93   configs = MALLOC(sizeof(*configs));
94   if (configs) {
95      configs[0] = &drmdpy->config->base;
96      if (num_configs)
97         *num_configs = 1;
98   }
99
100   return configs;
101}
102
103static int
104drm_display_get_param(struct native_display *ndpy,
105                      enum native_param_type param)
106{
107   int val;
108
109   switch (param) {
110   case NATIVE_PARAM_USE_NATIVE_BUFFER:
111   case NATIVE_PARAM_PRESERVE_BUFFER:
112   case NATIVE_PARAM_MAX_SWAP_INTERVAL:
113   default:
114      val = 0;
115      break;
116   }
117
118   return val;
119}
120
121static void
122drm_display_destroy(struct native_display *ndpy)
123{
124   struct drm_display *drmdpy = drm_display(ndpy);
125
126   if (drmdpy->config)
127      FREE(drmdpy->config);
128
129   drm_display_fini_modeset(&drmdpy->base);
130
131   /* gbm owns screen */
132   ndpy->screen = NULL;
133   ndpy_uninit(ndpy);
134
135   if (drmdpy->device_name)
136      FREE(drmdpy->device_name);
137
138   if (drmdpy->own_gbm) {
139      gbm_device_destroy(&drmdpy->gbmdrm->base.base);
140      if (drmdpy->fd >= 0)
141         close(drmdpy->fd);
142   }
143
144   FREE(drmdpy);
145}
146
147static struct native_display_buffer drm_display_buffer = {
148   /* use the helpers */
149   drm_display_import_native_buffer,
150   drm_display_export_native_buffer
151};
152
153static char *
154drm_get_device_name(int fd)
155{
156   char *device_name = NULL;
157#ifdef HAVE_LIBUDEV
158   struct udev *udev;
159   struct udev_device *device;
160   struct stat buf;
161   const char *tmp;
162
163   udev = udev_new();
164   if (fstat(fd, &buf) < 0) {
165      _eglLog(_EGL_WARNING, "failed to stat fd %d", fd);
166      goto out;
167   }
168
169   device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
170   if (device == NULL) {
171      _eglLog(_EGL_WARNING,
172              "could not create udev device for fd %d", fd);
173      goto out;
174   }
175
176   tmp = udev_device_get_devnode(device);
177   if (!tmp)
178      goto out;
179   device_name = strdup(tmp);
180
181out:
182   udev_device_unref(device);
183   udev_unref(udev);
184
185#endif
186   return device_name;
187}
188
189#ifdef HAVE_WAYLAND_BACKEND
190
191static int
192drm_display_authenticate(void *user_data, uint32_t magic)
193{
194   struct native_display *ndpy = user_data;
195   struct drm_display *drmdpy = drm_display(ndpy);
196
197   return drmAuthMagic(drmdpy->fd, magic);
198}
199
200static struct wayland_drm_callbacks wl_drm_callbacks = {
201   drm_display_authenticate,
202   egl_g3d_wl_drm_helper_reference_buffer,
203   egl_g3d_wl_drm_helper_unreference_buffer
204};
205
206static boolean
207drm_display_bind_wayland_display(struct native_display *ndpy,
208                                  struct wl_display *wl_dpy)
209{
210   struct drm_display *drmdpy = drm_display(ndpy);
211
212   if (drmdpy->wl_server_drm)
213      return FALSE;
214
215   drmdpy->wl_server_drm = wayland_drm_init(wl_dpy,
216         drmdpy->device_name,
217         &wl_drm_callbacks, ndpy);
218
219   if (!drmdpy->wl_server_drm)
220      return FALSE;
221
222   return TRUE;
223}
224
225static boolean
226drm_display_unbind_wayland_display(struct native_display *ndpy,
227                                    struct wl_display *wl_dpy)
228{
229   struct drm_display *drmdpy = drm_display(ndpy);
230
231   if (!drmdpy->wl_server_drm)
232      return FALSE;
233
234   wayland_drm_uninit(drmdpy->wl_server_drm);
235   drmdpy->wl_server_drm = NULL;
236
237   return TRUE;
238}
239
240static struct native_display_wayland_bufmgr drm_display_wayland_bufmgr = {
241   drm_display_bind_wayland_display,
242   drm_display_unbind_wayland_display,
243   egl_g3d_wl_drm_common_wl_buffer_get_resource
244};
245
246#endif /* HAVE_WAYLAND_BACKEND */
247
248static struct native_surface *
249drm_create_pixmap_surface(struct native_display *ndpy,
250                              EGLNativePixmapType pix,
251                              const struct native_config *nconf)
252{
253   struct gbm_gallium_drm_bo *bo = (void *) pix;
254
255   return drm_display_create_surface_from_resource(ndpy, bo->resource);
256}
257
258static boolean
259drm_display_init_screen(struct native_display *ndpy)
260{
261   return TRUE;
262}
263
264static struct native_display *
265drm_create_display(struct gbm_gallium_drm_device *gbmdrm, int own_gbm,
266                   const struct native_event_handler *event_handler)
267{
268   struct drm_display *drmdpy;
269
270   drmdpy = CALLOC_STRUCT(drm_display);
271   if (!drmdpy)
272      return NULL;
273
274   drmdpy->gbmdrm = gbmdrm;
275   drmdpy->own_gbm = own_gbm;
276   drmdpy->fd = gbmdrm->base.base.fd;
277   drmdpy->device_name = drm_get_device_name(drmdpy->fd);
278
279   gbmdrm->lookup_egl_image = (struct pipe_resource *(*)(void *, void *))
280      event_handler->lookup_egl_image;
281   gbmdrm->lookup_egl_image_data = &drmdpy->base;
282
283   drmdpy->event_handler = event_handler;
284
285   drmdpy->base.screen = gbmdrm->screen;
286
287   drmdpy->base.init_screen = drm_display_init_screen;
288   drmdpy->base.destroy = drm_display_destroy;
289   drmdpy->base.get_param = drm_display_get_param;
290   drmdpy->base.get_configs = drm_display_get_configs;
291
292   drmdpy->base.create_pixmap_surface = drm_create_pixmap_surface;
293
294   drmdpy->base.buffer = &drm_display_buffer;
295#ifdef HAVE_WAYLAND_BACKEND
296   if (drmdpy->device_name)
297      drmdpy->base.wayland_bufmgr = &drm_display_wayland_bufmgr;
298#endif
299   drm_display_init_modeset(&drmdpy->base);
300
301   return &drmdpy->base;
302}
303
304static const struct native_event_handler *drm_event_handler;
305
306static struct native_display *
307native_create_display(void *dpy, boolean use_sw)
308{
309   struct gbm_gallium_drm_device *gbm;
310   int fd;
311   int own_gbm = 0;
312
313   gbm = dpy;
314
315   if (gbm == NULL) {
316      const char *device_name="/dev/dri/card0";
317#ifdef O_CLOEXEC
318      fd = open(device_name, O_RDWR | O_CLOEXEC);
319      if (fd == -1 && errno == EINVAL)
320#endif
321      {
322         fd = open(device_name, O_RDWR);
323         if (fd != -1)
324            fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
325      }
326      /* FIXME: Use an internal constructor to create a gbm
327       * device with gallium backend directly, without setenv */
328      setenv("GBM_BACKEND", "gbm_gallium_drm.so", 1);
329      gbm = gbm_gallium_drm_device(gbm_create_device(fd));
330      own_gbm = 1;
331   }
332
333   if (gbm == NULL)
334      return NULL;
335
336   if (strcmp(gbm_device_get_backend_name(&gbm->base.base), "drm") != 0 ||
337       gbm->base.type != GBM_DRM_DRIVER_TYPE_GALLIUM) {
338      if (own_gbm)
339         gbm_device_destroy(&gbm->base.base);
340      return NULL;
341   }
342
343   return drm_create_display(gbm, own_gbm, drm_event_handler);
344}
345
346static const struct native_platform drm_platform = {
347   "DRM", /* name */
348   native_create_display
349};
350
351const struct native_platform *
352native_get_drm_platform(const struct native_event_handler *event_handler)
353{
354   drm_event_handler = event_handler;
355   return &drm_platform;
356}
357