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
43 static boolean
drm_display_is_format_supported(struct native_display * ndpy,enum pipe_format fmt,boolean is_color)44 drm_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
53 static const struct native_config **
drm_display_get_configs(struct native_display * ndpy,int * num_configs)54 drm_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
103 static int
drm_display_get_param(struct native_display * ndpy,enum native_param_type param)104 drm_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
121 static void
drm_display_destroy(struct native_display * ndpy)122 drm_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
147 static 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
153 static char *
drm_get_device_name(int fd)154 drm_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
181 out:
182 udev_device_unref(device);
183 udev_unref(udev);
184
185 #endif
186 return device_name;
187 }
188
189 #ifdef HAVE_WAYLAND_BACKEND
190
191 static int
drm_display_authenticate(void * user_data,uint32_t magic)192 drm_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
200 static 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
206 static boolean
drm_display_bind_wayland_display(struct native_display * ndpy,struct wl_display * wl_dpy)207 drm_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
225 static boolean
drm_display_unbind_wayland_display(struct native_display * ndpy,struct wl_display * wl_dpy)226 drm_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
240 static 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 egl_g3d_wl_drm_common_query_buffer
245 };
246
247 #endif /* HAVE_WAYLAND_BACKEND */
248
249 static struct native_surface *
drm_create_pixmap_surface(struct native_display * ndpy,EGLNativePixmapType pix,const struct native_config * nconf)250 drm_create_pixmap_surface(struct native_display *ndpy,
251 EGLNativePixmapType pix,
252 const struct native_config *nconf)
253 {
254 struct gbm_gallium_drm_bo *bo = (void *) pix;
255
256 return drm_display_create_surface_from_resource(ndpy, bo->resource);
257 }
258
259 static boolean
drm_display_init_screen(struct native_display * ndpy)260 drm_display_init_screen(struct native_display *ndpy)
261 {
262 return TRUE;
263 }
264
265 static struct native_display *
drm_create_display(struct gbm_gallium_drm_device * gbmdrm,int own_gbm,const struct native_event_handler * event_handler)266 drm_create_display(struct gbm_gallium_drm_device *gbmdrm, int own_gbm,
267 const struct native_event_handler *event_handler)
268 {
269 struct drm_display *drmdpy;
270
271 drmdpy = CALLOC_STRUCT(drm_display);
272 if (!drmdpy)
273 return NULL;
274
275 drmdpy->gbmdrm = gbmdrm;
276 drmdpy->own_gbm = own_gbm;
277 drmdpy->fd = gbmdrm->base.base.fd;
278 drmdpy->device_name = drm_get_device_name(drmdpy->fd);
279
280 gbmdrm->lookup_egl_image = (struct pipe_resource *(*)(void *, void *))
281 event_handler->lookup_egl_image;
282 gbmdrm->lookup_egl_image_data = &drmdpy->base;
283
284 drmdpy->event_handler = event_handler;
285
286 drmdpy->base.screen = gbmdrm->screen;
287
288 drmdpy->base.init_screen = drm_display_init_screen;
289 drmdpy->base.destroy = drm_display_destroy;
290 drmdpy->base.get_param = drm_display_get_param;
291 drmdpy->base.get_configs = drm_display_get_configs;
292
293 drmdpy->base.create_pixmap_surface = drm_create_pixmap_surface;
294
295 drmdpy->base.buffer = &drm_display_buffer;
296 #ifdef HAVE_WAYLAND_BACKEND
297 if (drmdpy->device_name)
298 drmdpy->base.wayland_bufmgr = &drm_display_wayland_bufmgr;
299 #endif
300 drm_display_init_modeset(&drmdpy->base);
301
302 return &drmdpy->base;
303 }
304
305 static const struct native_event_handler *drm_event_handler;
306
307 static struct native_display *
native_create_display(void * dpy,boolean use_sw)308 native_create_display(void *dpy, boolean use_sw)
309 {
310 struct gbm_gallium_drm_device *gbm;
311 int fd;
312 int own_gbm = 0;
313
314 gbm = dpy;
315
316 if (gbm == NULL) {
317 const char *device_name="/dev/dri/card0";
318 #ifdef O_CLOEXEC
319 fd = open(device_name, O_RDWR | O_CLOEXEC);
320 if (fd == -1 && errno == EINVAL)
321 #endif
322 {
323 fd = open(device_name, O_RDWR);
324 if (fd != -1)
325 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
326 }
327 /* FIXME: Use an internal constructor to create a gbm
328 * device with gallium backend directly, without setenv */
329 setenv("GBM_BACKEND", "gbm_gallium_drm.so", 1);
330 gbm = gbm_gallium_drm_device(gbm_create_device(fd));
331 own_gbm = 1;
332 }
333
334 if (gbm == NULL)
335 return NULL;
336
337 if (strcmp(gbm_device_get_backend_name(&gbm->base.base), "drm") != 0 ||
338 gbm->base.type != GBM_DRM_DRIVER_TYPE_GALLIUM) {
339 if (own_gbm)
340 gbm_device_destroy(&gbm->base.base);
341 return NULL;
342 }
343
344 return drm_create_display(gbm, own_gbm, drm_event_handler);
345 }
346
347 static const struct native_platform drm_platform = {
348 "DRM", /* name */
349 native_create_display
350 };
351
352 const struct native_platform *
native_get_drm_platform(const struct native_event_handler * event_handler)353 native_get_drm_platform(const struct native_event_handler *event_handler)
354 {
355 drm_event_handler = event_handler;
356 return &drm_platform;
357 }
358