1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (c) 2014 The Chromium OS Authors.
5 * Copyright © 2011 Intel Corporation
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 <dlfcn.h>
27 #include <fcntl.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32 #include "util/libdrm.h"
33 #include <sys/stat.h>
34 #include <sys/types.h>
35
36 #include "egl_dri2.h"
37 #include "eglglobals.h"
38 #include "kopper_interface.h"
39 #include "loader.h"
40 #include "loader_dri_helper.h"
41 #include "dri_util.h"
42
43 static __DRIimage *
surfaceless_alloc_image(struct dri2_egl_display * dri2_dpy,struct dri2_egl_surface * dri2_surf)44 surfaceless_alloc_image(struct dri2_egl_display *dri2_dpy,
45 struct dri2_egl_surface *dri2_surf)
46 {
47 return dri_create_image(
48 dri2_dpy->dri_screen_render_gpu, dri2_surf->base.Width,
49 dri2_surf->base.Height, dri2_surf->visual, NULL, 0, 0, NULL);
50 }
51
52 static void
surfaceless_free_images(struct dri2_egl_surface * dri2_surf)53 surfaceless_free_images(struct dri2_egl_surface *dri2_surf)
54 {
55 if (dri2_surf->front) {
56 dri2_destroy_image(dri2_surf->front);
57 dri2_surf->front = NULL;
58 }
59
60 free(dri2_surf->swrast_device_buffer);
61 dri2_surf->swrast_device_buffer = NULL;
62 }
63
64 static int
surfaceless_image_get_buffers(__DRIdrawable * driDrawable,unsigned int format,uint32_t * stamp,void * loaderPrivate,uint32_t buffer_mask,struct __DRIimageList * buffers)65 surfaceless_image_get_buffers(__DRIdrawable *driDrawable, unsigned int format,
66 uint32_t *stamp, void *loaderPrivate,
67 uint32_t buffer_mask,
68 struct __DRIimageList *buffers)
69 {
70 struct dri2_egl_surface *dri2_surf = loaderPrivate;
71 struct dri2_egl_display *dri2_dpy =
72 dri2_egl_display(dri2_surf->base.Resource.Display);
73
74 buffers->image_mask = 0;
75 buffers->front = NULL;
76 buffers->back = NULL;
77
78 /* The EGL 1.5 spec states that pbuffers are single-buffered. Specifically,
79 * the spec states that they have a back buffer but no front buffer, in
80 * contrast to pixmaps, which have a front buffer but no back buffer.
81 *
82 * Single-buffered surfaces with no front buffer confuse Mesa; so we deviate
83 * from the spec, following the precedent of Mesa's EGL X11 platform. The
84 * X11 platform correctly assigns pbuffers to single-buffered configs, but
85 * assigns the pbuffer a front buffer instead of a back buffer.
86 *
87 * Pbuffers in the X11 platform mostly work today, so let's just copy its
88 * behavior instead of trying to fix (and hence potentially breaking) the
89 * world.
90 */
91
92 if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
93
94 if (!dri2_surf->front) {
95 dri2_surf->front = surfaceless_alloc_image(dri2_dpy, dri2_surf);
96 if (!dri2_surf->front)
97 return 0;
98 }
99
100 buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
101 buffers->front = dri2_surf->front;
102 }
103
104 return 1;
105 }
106
107 static _EGLSurface *
dri2_surfaceless_create_surface(_EGLDisplay * disp,EGLint type,_EGLConfig * conf,const EGLint * attrib_list)108 dri2_surfaceless_create_surface(_EGLDisplay *disp, EGLint type,
109 _EGLConfig *conf, const EGLint *attrib_list)
110 {
111 struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
112 struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
113 struct dri2_egl_surface *dri2_surf;
114 const __DRIconfig *config;
115
116 /* Make sure to calloc so all pointers
117 * are originally NULL.
118 */
119 dri2_surf = calloc(1, sizeof *dri2_surf);
120
121 if (!dri2_surf) {
122 _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
123 return NULL;
124 }
125
126 if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list,
127 false, NULL))
128 goto cleanup_surface;
129
130 config = dri2_get_dri_config(dri2_conf, type, dri2_surf->base.GLColorspace);
131
132 if (!config) {
133 _eglError(EGL_BAD_MATCH,
134 "Unsupported surfacetype/colorspace configuration");
135 goto cleanup_surface;
136 }
137
138 dri2_surf->visual = dri2_image_format_for_pbuffer_config(dri2_dpy, config);
139 if (dri2_surf->visual == PIPE_FORMAT_NONE)
140 goto cleanup_surface;
141
142 if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
143 goto cleanup_surface;
144
145 return &dri2_surf->base;
146
147 cleanup_surface:
148 free(dri2_surf);
149 return NULL;
150 }
151
152 static EGLBoolean
surfaceless_destroy_surface(_EGLDisplay * disp,_EGLSurface * surf)153 surfaceless_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
154 {
155 struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
156
157 surfaceless_free_images(dri2_surf);
158
159 driDestroyDrawable(dri2_surf->dri_drawable);
160
161 dri2_fini_surface(surf);
162 free(dri2_surf);
163 return EGL_TRUE;
164 }
165
166 static _EGLSurface *
dri2_surfaceless_create_pbuffer_surface(_EGLDisplay * disp,_EGLConfig * conf,const EGLint * attrib_list)167 dri2_surfaceless_create_pbuffer_surface(_EGLDisplay *disp, _EGLConfig *conf,
168 const EGLint *attrib_list)
169 {
170 return dri2_surfaceless_create_surface(disp, EGL_PBUFFER_BIT, conf,
171 attrib_list);
172 }
173
174 static const struct dri2_egl_display_vtbl dri2_surfaceless_display_vtbl = {
175 .create_pbuffer_surface = dri2_surfaceless_create_pbuffer_surface,
176 .destroy_surface = surfaceless_destroy_surface,
177 .create_image = dri2_create_image_khr,
178 .get_dri_drawable = dri2_surface_get_dri_drawable,
179 };
180
181 static void
surfaceless_flush_front_buffer(__DRIdrawable * driDrawable,void * loaderPrivate)182 surfaceless_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
183 {
184 }
185
186 static unsigned
surfaceless_get_capability(void * loaderPrivate,enum dri_loader_cap cap)187 surfaceless_get_capability(void *loaderPrivate, enum dri_loader_cap cap)
188 {
189 /* Note: loaderPrivate is _EGLDisplay* */
190 switch (cap) {
191 case DRI_LOADER_CAP_FP16:
192 return 1;
193 case DRI_LOADER_CAP_RGBA_ORDERING:
194 return 1;
195 default:
196 return 0;
197 }
198 }
199
200 static const __DRIkopperLoaderExtension kopper_loader_extension = {
201 .base = {__DRI_KOPPER_LOADER, 1},
202
203 .SetSurfaceCreateInfo = NULL,
204 };
205
206 static const __DRIimageLoaderExtension image_loader_extension = {
207 .base = {__DRI_IMAGE_LOADER, 2},
208 .getBuffers = surfaceless_image_get_buffers,
209 .flushFrontBuffer = surfaceless_flush_front_buffer,
210 .getCapability = surfaceless_get_capability,
211 };
212
213 static const __DRIextension *image_loader_extensions[] = {
214 &image_loader_extension.base, &image_lookup_extension.base,
215 &use_invalidate.base, &background_callable_extension.base,
216 &kopper_loader_extension.base, NULL,
217 };
218
219 static const __DRIextension *swrast_loader_extensions[] = {
220 &swrast_pbuffer_loader_extension.base, &image_loader_extension.base,
221 &image_lookup_extension.base, &use_invalidate.base,
222 &kopper_loader_extension.base, NULL,
223 };
224
225 static bool
surfaceless_probe_device(_EGLDisplay * disp,bool swrast,bool zink)226 surfaceless_probe_device(_EGLDisplay *disp, bool swrast, bool zink)
227 {
228 const unsigned node_type = swrast ? DRM_NODE_PRIMARY : DRM_NODE_RENDER;
229 struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
230 _EGLDevice *dev_list = _eglGlobal.DeviceList;
231 drmDevicePtr device;
232
233 while (dev_list) {
234 if (!_eglDeviceSupports(dev_list, _EGL_DEVICE_DRM))
235 goto next;
236
237 if (_eglHasAttrib(disp, EGL_DEVICE_EXT) && dev_list != disp->Device) {
238 goto next;
239 }
240
241 device = _eglDeviceDrm(dev_list);
242 assert(device);
243
244 if (!(device->available_nodes & (1 << node_type)))
245 goto next;
246
247 dri2_dpy->fd_render_gpu = loader_open_device(device->nodes[node_type]);
248 if (dri2_dpy->fd_render_gpu < 0)
249 goto next;
250
251 disp->Device = dev_list;
252
253 char *driver_name = loader_get_driver_for_fd(dri2_dpy->fd_render_gpu);
254 if (swrast) {
255 /* Use kms swrast only with vgem / virtio_gpu.
256 * virtio-gpu fallbacks to software rendering when 3D features
257 * are unavailable since 6c5ab, and kms_swrast is more
258 * feature complete than swrast.
259 */
260 if (driver_name && (strcmp(driver_name, "vgem") == 0 ||
261 strcmp(driver_name, "virtio_gpu") == 0))
262 dri2_dpy->driver_name = strdup("kms_swrast");
263 free(driver_name);
264 } else {
265 /* Use the given hardware driver */
266 dri2_dpy->driver_name = driver_name;
267 }
268
269 if (dri2_dpy->driver_name && dri2_load_driver(disp)) {
270 if (swrast || zink)
271 dri2_dpy->loader_extensions = swrast_loader_extensions;
272 else
273 dri2_dpy->loader_extensions = image_loader_extensions;
274 break;
275 }
276
277 free(dri2_dpy->driver_name);
278 dri2_dpy->driver_name = NULL;
279 close(dri2_dpy->fd_render_gpu);
280 dri2_dpy->fd_render_gpu = -1;
281
282 next:
283 dev_list = _eglDeviceNext(dev_list);
284 }
285
286 if (!dev_list)
287 return false;
288
289 return true;
290 }
291
292 static bool
surfaceless_probe_device_sw(_EGLDisplay * disp)293 surfaceless_probe_device_sw(_EGLDisplay *disp)
294 {
295 struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
296 struct _egl_device *device = _eglFindDevice(dri2_dpy->fd_render_gpu, true);
297
298 dri2_dpy->fd_render_gpu = -1;
299
300 if (_eglHasAttrib(disp, EGL_DEVICE_EXT) && disp->Device != device) {
301 return false;
302 }
303
304 disp->Device = device;
305 assert(disp->Device);
306
307 dri2_dpy->driver_name = strdup(disp->Options.Zink ? "zink" : "swrast");
308 if (!dri2_dpy->driver_name)
309 return false;
310
311 if (!dri2_load_driver(disp)) {
312 free(dri2_dpy->driver_name);
313 dri2_dpy->driver_name = NULL;
314 return false;
315 }
316
317 dri2_dpy->loader_extensions = swrast_loader_extensions;
318 return true;
319 }
320
321 EGLBoolean
dri2_initialize_surfaceless(_EGLDisplay * disp)322 dri2_initialize_surfaceless(_EGLDisplay *disp)
323 {
324 const char *err;
325 bool driver_loaded = false;
326 struct dri2_egl_display *dri2_dpy = dri2_display_create();
327 if (!dri2_dpy)
328 return EGL_FALSE;
329
330 disp->DriverData = (void *)dri2_dpy;
331
332 /* When ForceSoftware is false, we try the HW driver. When ForceSoftware
333 * is true, we try kms_swrast and swrast in order.
334 */
335 driver_loaded = surfaceless_probe_device(disp, disp->Options.ForceSoftware,
336 disp->Options.Zink);
337 if (!driver_loaded && disp->Options.ForceSoftware) {
338 _eglLog(_EGL_DEBUG, "Falling back to surfaceless swrast without DRM.");
339 driver_loaded = surfaceless_probe_device_sw(disp);
340 }
341
342 if (!driver_loaded) {
343 err = "DRI2: failed to load driver";
344 goto cleanup;
345 }
346
347 dri2_dpy->fd_display_gpu = dri2_dpy->fd_render_gpu;
348
349 if (!dri2_create_screen(disp)) {
350 err = "DRI2: failed to create screen";
351 goto cleanup;
352 }
353
354 dri2_setup_screen(disp);
355 #ifdef HAVE_WAYLAND_PLATFORM
356 dri2_dpy->device_name =
357 loader_get_device_name_for_fd(dri2_dpy->fd_render_gpu);
358 #endif
359 dri2_set_WL_bind_wayland_display(disp);
360
361 dri2_add_pbuffer_configs_for_visuals(disp);
362
363 /* Fill vtbl last to prevent accidentally calling virtual function during
364 * initialization.
365 */
366 dri2_dpy->vtbl = &dri2_surfaceless_display_vtbl;
367
368 return EGL_TRUE;
369
370 cleanup:
371 dri2_display_destroy(disp);
372 return _eglError(EGL_NOT_INITIALIZED, err);
373 }
374