src/gallium/winsys/drm/radeon/core/radeon_drm.c

   1 /*
   2  * Copyright © 2009 Corbin Simpson
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  15  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16  * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
  17  * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  */
  26 /*
  27  * Authors:
  28  *      Corbin Simpson <MostAwesomeDude@gmail.com>
  29  *      Joakim Sindholt <opensource@zhasha.com>
  30  */
  31
  32 #include "radeon_drm.h"
  33
  34 /* Create a pipe_screen. */
  35 struct pipe_screen* radeon_create_screen(struct drm_api* api,
  36                                          int drmFB,
  37                                          struct drm_create_screen_arg *arg)
  38 {
  39     struct radeon_winsys* winsys = radeon_pipe_winsys(drmFB);
  40
  41     if (getenv("RADEON_SOFTPIPE")) {
  42         return softpipe_create_screen((struct pipe_winsys*)winsys);
  43     } else {
  44         struct r300_winsys* r300 = radeon_create_r300_winsys(drmFB, winsys);
  45         FREE(winsys);
  46         return r300_create_screen(r300);
  47     }
  48 }
  49
  50 /* Create a pipe_context. */
  51 struct pipe_context* radeon_create_context(struct drm_api* api,
  52                                            struct pipe_screen* screen)
  53 {
  54     if (getenv("RADEON_SOFTPIPE")) {
  55         return radeon_create_softpipe(screen->winsys);
  56     } else {
  57         return r300_create_context(screen,
  58                                    (struct r300_winsys*)screen->winsys);
  59     }
  60 }
  61
  62 boolean radeon_buffer_from_texture(struct drm_api* api,
  63                                    struct pipe_texture* texture,
  64                                    struct pipe_buffer** buffer,
  65                                    unsigned* stride)
  66 {
  67     /* XXX fix this */
  68     return r300_get_texture_buffer(texture, buffer, stride);
  69 }
  70
  71 /* Create a buffer from a handle. */
  72 /* XXX what's up with name? */
  73 struct pipe_buffer* radeon_buffer_from_handle(struct drm_api* api,
  74                                               struct pipe_screen* screen,
  75                                               const char* name,
  76                                               unsigned handle)
  77 {
  78     struct radeon_bo_manager* bom =
  79         ((struct radeon_winsys*)screen->winsys)->priv->bom;
  80     struct radeon_pipe_buffer* radeon_buffer;
  81     struct radeon_bo* bo = NULL;
  82
  83     bo = radeon_bo_open(bom, handle, 0, 0, 0, 0);
  84     if (bo == NULL) {
  85         return NULL;
  86     }
  87
  88     radeon_buffer = CALLOC_STRUCT(radeon_pipe_buffer);
  89     if (radeon_buffer == NULL) {
  90         radeon_bo_unref(bo);
  91         return NULL;
  92     }
  93
  94     pipe_reference_init(&radeon_buffer->base.reference, 1);
  95     radeon_buffer->base.screen = screen;
  96     radeon_buffer->base.usage = PIPE_BUFFER_USAGE_PIXEL;
  97     radeon_buffer->bo = bo;
  98     return &radeon_buffer->base;
  99 }
 100
 101 static struct pipe_texture*
 102 radeon_texture_from_shared_handle(struct drm_api *api,
 103                                   struct pipe_screen *screen,
 104                                   struct pipe_texture *templ,
 105                                   const char *name,
 106                                   unsigned stride,
 107                                   unsigned handle)
 108 {
 109     struct pipe_buffer *buffer;
 110     struct pipe_texture *blanket;
 111
 112     buffer = radeon_buffer_from_handle(api, screen, name, handle);
 113     if (!buffer) {
 114         return NULL;
 115     }
 116
 117     blanket = screen->texture_blanket(screen, templ, &stride, buffer);
 118
 119     pipe_buffer_reference(&buffer, NULL);
 120
 121     return blanket;
 122 }
 123
 124 static boolean radeon_shared_handle_from_texture(struct drm_api *api,
 125                                                  struct pipe_screen *screen,
 126                                                  struct pipe_texture *texture,
 127                                                  unsigned *stride,
 128                                                  unsigned *handle)
 129 {
 130     int retval, fd;
 131     struct drm_gem_flink flink;
 132     struct radeon_pipe_buffer* radeon_buffer;
 133     struct pipe_buffer *buffer;
 134
 135     if (!radeon_buffer_from_texture(api, texture, &buffer, stride)) {
 136         return FALSE;
 137     }
 138
 139     radeon_buffer = (struct radeon_pipe_buffer*)buffer;
 140     if (!radeon_buffer->flinked) {
 141         fd = ((struct radeon_winsys*)screen->winsys)->priv->fd;
 142
 143         flink.handle = radeon_buffer->bo->handle;
 144
 145         retval = ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink);
 146         if (retval) {
 147             debug_printf("radeon: DRM_IOCTL_GEM_FLINK failed, error %d\n",
 148                     retval);
 149             return FALSE;
 150         }
 151
 152         radeon_buffer->flink = flink.name;
 153         radeon_buffer->flinked = TRUE;
 154     }
 155
 156     *handle = radeon_buffer->flink;
 157     return TRUE;
 158 }
 159
 160 static boolean radeon_local_handle_from_texture(struct drm_api *api,
 161                                                 struct pipe_screen *screen,
 162                                                 struct pipe_texture *texture,
 163                                                 unsigned *stride,
 164                                                 unsigned *handle)
 165 {
 166     struct pipe_buffer *buffer;
 167     if (!radeon_buffer_from_texture(api, texture, &buffer, stride)) {
 168         return FALSE;
 169     }
 170
 171     *handle = ((struct radeon_pipe_buffer*)buffer)->bo->handle;
 172
 173     pipe_buffer_reference(&buffer, NULL);
 174
 175     return TRUE;
 176 }
 177
 178 struct drm_api drm_api_hooks = {
 179     .create_screen = radeon_create_screen,
 180     .create_context = radeon_create_context,
 181     .texture_from_shared_handle = radeon_texture_from_shared_handle,
 182     .shared_handle_from_texture = radeon_shared_handle_from_texture,
 183     .local_handle_from_texture = radeon_local_handle_from_texture,
 184 };
 185
 186 struct drm_api* drm_api_create()
 187 {
 188 #ifdef DEBUG
 189     return trace_drm_create(&drm_api_hooks);
 190 #else
 191     return &drm_api_hooks;
 192 #endif
 193 }