src/egl/drivers/dri2/platform_device.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright 2018 Collabora
   5  *
   6  * Based on platform_surfaceless, which has:
   7  *
   8  * Copyright (c) 2014 The Chromium OS Authors.
   9  * Copyright © 2011 Intel Corporation
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included
  19  * in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  26  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  27  * DEALINGS IN THE SOFTWARE.
  28  */
  29 #ifdef HAVE_LIBDRM
  30 #include <xf86drm.h>
  31 #endif
  32
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <dlfcn.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #include <fcntl.h>
  40 #include <unistd.h>
  41
  42 #include "egl_dri2.h"
  43 #include "egl_dri2_fallbacks.h"
  44 #include "loader.h"
  45
  46 static __DRIimage*
  47 device_alloc_image(struct dri2_egl_display *dri2_dpy,
  48                    struct dri2_egl_surface *dri2_surf)
  49 {
  50    return dri2_dpy->image->createImage(
  51             dri2_dpy->dri_screen,
  52             dri2_surf->base.Width,
  53             dri2_surf->base.Height,
  54             dri2_surf->visual,
  55             0,
  56             NULL);
  57 }
  58
  59 static void
  60 device_free_images(struct dri2_egl_surface *dri2_surf)
  61 {
  62    struct dri2_egl_display *dri2_dpy =
  63       dri2_egl_display(dri2_surf->base.Resource.Display);
  64
  65    if (dri2_surf->front) {
  66       dri2_dpy->image->destroyImage(dri2_surf->front);
  67       dri2_surf->front = NULL;
  68    }
  69 }
  70
  71 static int
  72 device_image_get_buffers(__DRIdrawable *driDrawable,
  73                          unsigned int format,
  74                          uint32_t *stamp,
  75                          void *loaderPrivate,
  76                          uint32_t buffer_mask,
  77                          struct __DRIimageList *buffers)
  78 {
  79    struct dri2_egl_surface *dri2_surf = loaderPrivate;
  80    struct dri2_egl_display *dri2_dpy =
  81       dri2_egl_display(dri2_surf->base.Resource.Display);
  82
  83    buffers->image_mask = 0;
  84    buffers->front = NULL;
  85    buffers->back = NULL;
  86
  87    /* The EGL 1.5 spec states that pbuffers are single-buffered. Specifically,
  88     * the spec states that they have a back buffer but no front buffer, in
  89     * contrast to pixmaps, which have a front buffer but no back buffer.
  90     *
  91     * Single-buffered surfaces with no front buffer confuse Mesa; so we deviate
  92     * from the spec, following the precedent of Mesa's EGL X11 platform. The
  93     * X11 platform correctly assigns pbuffers to single-buffered configs, but
  94     * assigns the pbuffer a front buffer instead of a back buffer.
  95     *
  96     * Pbuffers in the X11 platform mostly work today, so let's just copy its
  97     * behavior instead of trying to fix (and hence potentially breaking) the
  98     * world.
  99     */
 100
 101    if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
 102
 103       if (!dri2_surf->front)
 104          dri2_surf->front =
 105             device_alloc_image(dri2_dpy, dri2_surf);
 106
 107       buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
 108       buffers->front = dri2_surf->front;
 109    }
 110
 111    return 1;
 112 }
 113
 114 static _EGLSurface *
 115 dri2_device_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 116                            _EGLConfig *conf, const EGLint *attrib_list)
 117 {
 118    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 119    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 120    struct dri2_egl_surface *dri2_surf;
 121    const __DRIconfig *config;
 122
 123    /* Make sure to calloc so all pointers
 124     * are originally NULL.
 125     */
 126    dri2_surf = calloc(1, sizeof *dri2_surf);
 127
 128    if (!dri2_surf) {
 129       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
 130       return NULL;
 131    }
 132
 133    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list,
 134                           false, NULL))
 135       goto cleanup_surface;
 136
 137    config = dri2_get_dri_config(dri2_conf, type,
 138                                 dri2_surf->base.GLColorspace);
 139
 140    if (!config) {
 141       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 142       goto cleanup_surface;
 143    }
 144
 145    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
 146       goto cleanup_surface;
 147
 148    if (conf->RedSize == 5)
 149       dri2_surf->visual = __DRI_IMAGE_FORMAT_RGB565;
 150    else if (conf->AlphaSize == 0)
 151       dri2_surf->visual = __DRI_IMAGE_FORMAT_XRGB8888;
 152    else
 153       dri2_surf->visual = __DRI_IMAGE_FORMAT_ARGB8888;
 154
 155    return &dri2_surf->base;
 156
 157    cleanup_surface:
 158       free(dri2_surf);
 159       return NULL;
 160 }
 161
 162 static EGLBoolean
 163 device_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 164 {
 165    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 166    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 167
 168    device_free_images(dri2_surf);
 169
 170    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 171
 172    dri2_fini_surface(surf);
 173    free(dri2_surf);
 174    return EGL_TRUE;
 175 }
 176
 177 static _EGLSurface *
 178 dri2_device_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 179                                    _EGLConfig *conf, const EGLint *attrib_list)
 180 {
 181    return dri2_device_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 182                                      attrib_list);
 183 }
 184
 185 static EGLBoolean
 186 device_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 187 {
 188    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 189    static const struct {
 190       const char *format_name;
 191       unsigned int rgba_masks[4];
 192    } visuals[] = {
 193       { "ARGB8888", { 0xff0000, 0xff00, 0xff, 0xff000000 } },
 194       { "RGB888",   { 0xff0000, 0xff00, 0xff, 0x0 } },
 195       { "RGB565",   { 0x00f800, 0x07e0, 0x1f, 0x0 } },
 196    };
 197    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 198    unsigned int config_count = 0;
 199
 200    for (unsigned i = 0; dri2_dpy->driver_configs[i] != NULL; i++) {
 201       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
 202          struct dri2_egl_config *dri2_conf;
 203
 204          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 205                config_count + 1, EGL_PBUFFER_BIT, NULL,
 206                visuals[j].rgba_masks);
 207
 208          if (dri2_conf) {
 209             if (dri2_conf->base.ConfigID == config_count + 1)
 210                config_count++;
 211             format_count[j]++;
 212          }
 213       }
 214    }
 215
 216    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 217       if (!format_count[i]) {
 218          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
 219                visuals[i].format_name);
 220       }
 221    }
 222
 223    return (config_count != 0);
 224 }
 225
 226 static const struct dri2_egl_display_vtbl dri2_device_display_vtbl = {
 227    .create_pixmap_surface = dri2_fallback_create_pixmap_surface,
 228    .create_pbuffer_surface = dri2_device_create_pbuffer_surface,
 229    .destroy_surface = device_destroy_surface,
 230    .create_image = dri2_create_image_khr,
 231    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 232    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 233    .copy_buffers = dri2_fallback_copy_buffers,
 234    .query_buffer_age = dri2_fallback_query_buffer_age,
 235    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 236    .get_sync_values = dri2_fallback_get_sync_values,
 237    .get_dri_drawable = dri2_surface_get_dri_drawable,
 238 };
 239
 240 static void
 241 device_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 242 {
 243 }
 244
 245 static const __DRIimageLoaderExtension image_loader_extension = {
 246    .base             = { __DRI_IMAGE_LOADER, 1 },
 247    .getBuffers       = device_image_get_buffers,
 248    .flushFrontBuffer = device_flush_front_buffer,
 249 };
 250
 251 static void
 252 device_get_drawable_info(__DRIdrawable * draw,
 253                          int *x, int *y, int *w, int *h,
 254                          void *loaderPrivate)
 255 {
 256    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 257
 258    *x = *y = 0;
 259    *w = dri2_surf->base.Width;
 260    *h = dri2_surf->base.Height;
 261 }
 262
 263 /* HACK: technically we should have swrast_null, instead of these. We
 264  * get away since only pbuffers are supported, thus the callbacks are
 265  * unused.
 266  */
 267 static const __DRIswrastLoaderExtension swrast_loader_extension = {
 268    .base            = { __DRI_SWRAST_LOADER, 1 },
 269    .getDrawableInfo = device_get_drawable_info,
 270    .putImage        = NULL,
 271    .getImage        = NULL,
 272 };
 273
 274 static const __DRIextension *image_loader_extensions[] = {
 275    &image_loader_extension.base,
 276    &image_lookup_extension.base,
 277    &use_invalidate.base,
 278    NULL,
 279 };
 280
 281 /* HACK: second part of the hack above. */
 282 static const __DRIextension *swrast_loader_extensions[] = {
 283    &swrast_loader_extension.base,
 284    &image_lookup_extension.base,
 285    &use_invalidate.base,
 286    NULL,
 287 };
 288
 289 static int
 290 device_get_fd(_EGLDisplay *disp, _EGLDevice *dev)
 291 {
 292 #ifdef HAVE_LIBDRM
 293    int fd = disp->Options.fd;
 294    /* The fcntl() code in _eglGetDeviceDisplay() ensures that valid fd >= 3,
 295     * and invalid one is 0.
 296     */
 297    if (fd) {
 298       /* According to the spec - if the FD does not match the EGLDevice
 299        * behaviour is undefined.
 300        *
 301        * Add a trivial sanity check since it doesn't cost us anything.
 302        */
 303       if (dev != _eglAddDevice(fd, false))
 304          return -1;
 305
 306       /* No EGL_EXT_output* extensions are supported, hence no master perms
 307        * are needed. Get the render one - otherwise drivers might error out.
 308        */
 309       char *node = drmGetRenderDeviceNameFromFd(fd);
 310
 311       /* Don't close the internal fd, get render node one based on it. */
 312       fd = loader_open_device(node);
 313       free(node);
 314       return fd;
 315    }
 316    const char *node = _eglGetDRMDeviceRenderNode(dev);
 317    return loader_open_device(node);
 318 #else
 319    _eglLog(_EGL_FATAL, "Driver bug: Built without libdrm, yet using a HW device");
 320    return -1;
 321 #endif
 322 }
 323
 324 static bool
 325 device_probe_device(_EGLDisplay *disp)
 326 {
 327    struct dri2_egl_display *dri2_dpy = disp->DriverData;
 328
 329    if (disp->Options.ForceSoftware)
 330       _eglLog(_EGL_WARNING, "Not allowed to force software rendering when "
 331                             "API explicitly selects a hardware device.");
 332    dri2_dpy->fd = device_get_fd(disp, disp->Device);
 333    if (dri2_dpy->fd < 0)
 334       return false;
 335
 336    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 337    if (!dri2_dpy->driver_name)
 338       goto err_name;
 339
 340    if (!dri2_load_driver_dri3(disp))
 341       goto err_load;
 342
 343    dri2_dpy->loader_extensions = image_loader_extensions;
 344    return true;
 345
 346 err_load:
 347    free(dri2_dpy->driver_name);
 348    dri2_dpy->driver_name = NULL;
 349
 350 err_name:
 351    close(dri2_dpy->fd);
 352    dri2_dpy->fd = -1;
 353    return false;
 354
 355 }
 356
 357 static bool
 358 device_probe_device_sw(_EGLDisplay *disp)
 359 {
 360    struct dri2_egl_display *dri2_dpy = disp->DriverData;
 361
 362    dri2_dpy->fd = -1;
 363    dri2_dpy->driver_name = strdup("swrast");
 364    if (!dri2_dpy->driver_name)
 365       return false;
 366
 367    /* HACK: should be driver_swrast_null */
 368    if (!dri2_load_driver_swrast(disp)) {
 369       free(dri2_dpy->driver_name);
 370       dri2_dpy->driver_name = NULL;
 371       return false;
 372    }
 373
 374    dri2_dpy->loader_extensions = swrast_loader_extensions;
 375    return true;
 376 }
 377
 378 EGLBoolean
 379 dri2_initialize_device(_EGLDriver *drv, _EGLDisplay *disp)
 380 {
 381    _EGLDevice *dev;
 382    struct dri2_egl_display *dri2_dpy;
 383    const char* err;
 384
 385    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 386    if (!dri2_dpy)
 387       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 388
 389    /* Extension requires a PlatformDisplay - the EGLDevice. */
 390    dev = disp->PlatformDisplay;
 391
 392    dri2_dpy->fd = -1;
 393    disp->Device = dev;
 394    disp->DriverData = (void *) dri2_dpy;
 395    err = "DRI2: failed to load driver";
 396    if (_eglDeviceSupports(dev, _EGL_DEVICE_DRM)) {
 397       if (!device_probe_device(disp))
 398          goto cleanup;
 399    } else if (_eglDeviceSupports(dev, _EGL_DEVICE_SOFTWARE)) {
 400       if (!device_probe_device_sw(disp))
 401          goto cleanup;
 402    } else {
 403       _eglLog(_EGL_FATAL, "Driver bug: exposed device is neither DRM nor SOFTWARE one");
 404       return EGL_FALSE;
 405    }
 406
 407    if (!dri2_create_screen(disp)) {
 408       err = "DRI2: failed to create screen";
 409       goto cleanup;
 410    }
 411
 412    if (!dri2_setup_extensions(disp)) {
 413       err = "DRI2: failed to find required DRI extensions";
 414       goto cleanup;
 415    }
 416
 417    dri2_setup_screen(disp);
 418
 419    if (!device_add_configs_for_visuals(drv, disp)) {
 420       err = "DRI2: failed to add configs";
 421       goto cleanup;
 422    }
 423
 424    /* Fill vtbl last to prevent accidentally calling virtual function during
 425     * initialization.
 426     */
 427    dri2_dpy->vtbl = &dri2_device_display_vtbl;
 428
 429    return EGL_TRUE;
 430
 431 cleanup:
 432    dri2_display_destroy(disp);
 433    return _eglError(EGL_NOT_INITIALIZED, err);
 434 }