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 #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
  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 **
  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
 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
 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 *
 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
 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
 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
 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 *
 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
 260 drm_display_init_screen(struct native_display *ndpy)
 261 {
 262    return TRUE;
 263 }
 264
 265 static struct native_display *
 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 *
 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 *
 353 native_get_drm_platform(const struct native_event_handler *event_handler)
 354 {
 355    drm_event_handler = event_handler;
 356    return &drm_platform;
 357 }