src/gallium/state_trackers/egl/drm/native_drm.c

   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
  42 static boolean
  43 drm_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
  52 static const struct native_config **
  53 drm_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
 102 static int
 103 drm_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
 120 static void
 121 drm_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->fd >= 0)
 138       close(drmdpy->fd);
 139
 140    FREE(drmdpy);
 141 }
 142
 143 static struct native_display_buffer drm_display_buffer = {
 144    /* use the helpers */
 145    drm_display_import_native_buffer,
 146    drm_display_export_native_buffer
 147 };
 148
 149 static int
 150 drm_display_authenticate(void *user_data, uint32_t magic)
 151 {
 152    struct native_display *ndpy = user_data;
 153    struct drm_display *drmdpy = drm_display(ndpy);
 154
 155    return drmAuthMagic(drmdpy->fd, magic);
 156 }
 157
 158 static char *
 159 drm_get_device_name(int fd)
 160 {
 161    char *device_name = NULL;
 162 #ifdef HAVE_LIBUDEV
 163    struct udev *udev;
 164    struct udev_device *device;
 165    struct stat buf;
 166    const char *tmp;
 167
 168    udev = udev_new();
 169    if (fstat(fd, &buf) < 0) {
 170       _eglLog(_EGL_WARNING, "failed to stat fd %d", fd);
 171       goto out;
 172    }
 173
 174    device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
 175    if (device == NULL) {
 176       _eglLog(_EGL_WARNING,
 177               "could not create udev device for fd %d", fd);
 178       goto out;
 179    }
 180
 181    tmp = udev_device_get_devnode(device);
 182    if (!tmp)
 183       goto out;
 184    device_name = strdup(tmp);
 185
 186 out:
 187    udev_device_unref(device);
 188    udev_unref(udev);
 189
 190 #endif
 191    return device_name;
 192 }
 193
 194 #ifdef HAVE_WAYLAND_BACKEND
 195
 196 static struct wayland_drm_callbacks wl_drm_callbacks = {
 197    drm_display_authenticate,
 198    egl_g3d_wl_drm_helper_reference_buffer,
 199    egl_g3d_wl_drm_helper_unreference_buffer
 200 };
 201
 202 static boolean
 203 drm_display_bind_wayland_display(struct native_display *ndpy,
 204                                   struct wl_display *wl_dpy)
 205 {
 206    struct drm_display *drmdpy = drm_display(ndpy);
 207
 208    if (drmdpy->wl_server_drm)
 209       return FALSE;
 210
 211    drmdpy->wl_server_drm = wayland_drm_init(wl_dpy,
 212          drmdpy->device_name,
 213          &wl_drm_callbacks, ndpy);
 214
 215    if (!drmdpy->wl_server_drm)
 216       return FALSE;
 217
 218    return TRUE;
 219 }
 220
 221 static boolean
 222 drm_display_unbind_wayland_display(struct native_display *ndpy,
 223                                     struct wl_display *wl_dpy)
 224 {
 225    struct drm_display *drmdpy = drm_display(ndpy);
 226
 227    if (!drmdpy->wl_server_drm)
 228       return FALSE;
 229
 230    wayland_drm_uninit(drmdpy->wl_server_drm);
 231    drmdpy->wl_server_drm = NULL;
 232
 233    return TRUE;
 234 }
 235
 236 static struct native_display_wayland_bufmgr drm_display_wayland_bufmgr = {
 237    drm_display_bind_wayland_display,
 238    drm_display_unbind_wayland_display,
 239    egl_g3d_wl_drm_common_wl_buffer_get_resource
 240 };
 241
 242 #endif /* HAVE_WAYLAND_BACKEND */
 243
 244 static struct native_surface *
 245 drm_create_pixmap_surface(struct native_display *ndpy,
 246                               EGLNativePixmapType pix,
 247                               const struct native_config *nconf)
 248 {
 249    struct gbm_gallium_drm_bo *bo = (void *) pix;
 250
 251    return drm_display_create_surface_from_resource(ndpy, bo->resource);
 252 }
 253
 254 static boolean
 255 drm_display_init_screen(struct native_display *ndpy)
 256 {
 257    return TRUE;
 258 }
 259
 260 static struct native_display *
 261 drm_create_display(struct gbm_gallium_drm_device *gbmdrm,
 262                    const struct native_event_handler *event_handler)
 263 {
 264    struct drm_display *drmdpy;
 265
 266    drmdpy = CALLOC_STRUCT(drm_display);
 267    if (!drmdpy)
 268       return NULL;
 269
 270    drmdpy->fd = gbmdrm->base.base.fd;
 271    drmdpy->device_name = drm_get_device_name(drmdpy->fd);
 272
 273    gbmdrm->lookup_egl_image = (struct pipe_resource *(*)(void *, void *))
 274       event_handler->lookup_egl_image;
 275    gbmdrm->lookup_egl_image_data = &drmdpy->base;
 276
 277    drmdpy->event_handler = event_handler;
 278
 279    drmdpy->base.screen = gbmdrm->screen;
 280
 281    drmdpy->base.init_screen = drm_display_init_screen;
 282    drmdpy->base.destroy = drm_display_destroy;
 283    drmdpy->base.get_param = drm_display_get_param;
 284    drmdpy->base.get_configs = drm_display_get_configs;
 285
 286    drmdpy->base.create_pixmap_surface = drm_create_pixmap_surface;
 287
 288    drmdpy->base.buffer = &drm_display_buffer;
 289 #ifdef HAVE_WAYLAND_BACKEND
 290    if (drmdpy->device_name)
 291       drmdpy->base.wayland_bufmgr = &drm_display_wayland_bufmgr;
 292 #endif
 293    drm_display_init_modeset(&drmdpy->base);
 294
 295    return &drmdpy->base;
 296 }
 297
 298 static const struct native_event_handler *drm_event_handler;
 299
 300 static struct native_display *
 301 native_create_display(void *dpy, boolean use_sw)
 302 {
 303    struct gbm_gallium_drm_device *gbm;
 304    int fd;
 305
 306    gbm = dpy;
 307
 308    if (gbm == NULL) {
 309       fd = open("/dev/dri/card0", O_RDWR);
 310       gbm = gbm_gallium_drm_device(gbm_create_device(fd));
 311    }
 312
 313    if (gbm == NULL)
 314       return NULL;
 315
 316    if (strcmp(gbm_device_get_backend_name(&gbm->base.base), "drm") != 0 ||
 317        gbm->base.type != GBM_DRM_DRIVER_TYPE_GALLIUM)
 318       return NULL;
 319
 320    return drm_create_display(gbm, drm_event_handler);
 321 }
 322
 323 static const struct native_platform drm_platform = {
 324    "DRM", /* name */
 325    native_create_display
 326 };
 327
 328 const struct native_platform *
 329 native_get_drm_platform(const struct native_event_handler *event_handler)
 330 {
 331    drm_event_handler = event_handler;
 332    return &drm_platform;
 333 }