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 "softpipe/sp_winsys.h"
  33
  34 #include "radeon_drm.h"
  35
  36 /* Helper function to do the ioctls needed for setup and init. */
  37 static void do_ioctls(int fd, struct radeon_winsys* winsys)
  38 {
  39     struct drm_radeon_gem_info gem_info = {0};
  40     struct drm_radeon_info info = {0};
  41     int target = 0;
  42     int retval;
  43
  44     info.value = (unsigned long)&target;
  45
  46     /* We do things in a specific order here.
  47      *
  48      * First, the PCI ID. This is essential and should return usable numbers
  49      * for all Radeons. If this fails, we probably got handed an FD for some
  50      * non-Radeon card.
  51      *
  52      * The GB and Z pipe requests should always succeed, but they might not
  53      * return sensical values for all chipsets, but that's alright because
  54      * the pipe drivers already know that.
  55      *
  56      * The GEM info is actually bogus on the kernel side, as well as our side
  57      * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
  58      * we don't actually use the info for anything yet.
  59      * XXX update the above when we can safely use vram_size instead of vram_visible */
  60     info.request = RADEON_INFO_DEVICE_ID;
  61     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  62     if (retval) {
  63         fprintf(stderr, "%s: Failed to get PCI ID, "
  64                 "error number %d\n", __FUNCTION__, retval);
  65         exit(1);
  66     }
  67     winsys->pci_id = target;
  68
  69     info.request = RADEON_INFO_NUM_GB_PIPES;
  70     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  71     if (retval) {
  72         fprintf(stderr, "%s: Failed to get GB pipe count, "
  73                 "error number %d\n", __FUNCTION__, retval);
  74         exit(1);
  75     }
  76     winsys->gb_pipes = target;
  77
  78     info.request = RADEON_INFO_NUM_Z_PIPES;
  79     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  80     if (retval) {
  81         fprintf(stderr, "%s: Failed to get Z pipe count, "
  82                 "error number %d\n", __FUNCTION__, retval);
  83         exit(1);
  84     }
  85     winsys->z_pipes = target;
  86
  87     retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
  88             &gem_info, sizeof(gem_info));
  89     if (retval) {
  90         fprintf(stderr, "%s: Failed to get MM info, error number %d\n",
  91                 __FUNCTION__, retval);
  92         exit(1);
  93     }
  94     winsys->gart_size = gem_info.gart_size;
  95     /* XXX */
  96     winsys->vram_size = gem_info.vram_visible;
  97 }
  98
  99 /* Guess at whether this chipset should use r300g.
 100  *
 101  * I believe that this check is valid, but I haven't been exhaustive. */
 102 static boolean is_r3xx(int pciid)
 103 {
 104     return (pciid > 0x3150) && (pciid < 0x796f);
 105 }
 106
 107 /* Create a pipe_screen. */
 108 struct pipe_screen* radeon_create_screen(struct drm_api* api,
 109                                          int drmFB,
 110                                          struct drm_create_screen_arg *arg)
 111 {
 112     struct radeon_winsys* rwinsys = radeon_pipe_winsys(drmFB);
 113     do_ioctls(drmFB, rwinsys);
 114
 115     if (!is_r3xx(rwinsys->pci_id) ||
 116         debug_get_bool_option("RADEON_SOFTPIPE", FALSE)) {
 117         return softpipe_create_screen((struct pipe_winsys*)rwinsys);
 118     } else {
 119         radeon_setup_winsys(drmFB, rwinsys);
 120         return r300_create_screen(rwinsys);
 121     }
 122 }
 123
 124 /* Create a pipe_context. */
 125 struct pipe_context* radeon_create_context(struct drm_api* api,
 126                                            struct pipe_screen* screen)
 127 {
 128     struct radeon_winsys* rwinsys = (struct radeon_winsys*)screen->winsys;
 129
 130     if (!is_r3xx(rwinsys->pci_id) ||
 131         debug_get_bool_option("RADEON_SOFTPIPE", FALSE)) {
 132         return softpipe_create(screen);
 133     } else {
 134         return r300_create_context(screen, rwinsys);
 135     }
 136 }
 137
 138 boolean radeon_buffer_from_texture(struct drm_api* api,
 139                                    struct pipe_texture* texture,
 140                                    struct pipe_buffer** buffer,
 141                                    unsigned* stride)
 142 {
 143     /* XXX fix this */
 144     return r300_get_texture_buffer(texture, buffer, stride);
 145 }
 146
 147 /* Create a buffer from a handle. */
 148 /* XXX what's up with name? */
 149 struct pipe_buffer* radeon_buffer_from_handle(struct drm_api* api,
 150                                               struct pipe_screen* screen,
 151                                               const char* name,
 152                                               unsigned handle)
 153 {
 154     struct radeon_bo_manager* bom =
 155         ((struct radeon_winsys*)screen->winsys)->priv->bom;
 156     struct radeon_pipe_buffer* radeon_buffer;
 157     struct radeon_bo* bo = NULL;
 158
 159     bo = radeon_bo_open(bom, handle, 0, 0, 0, 0);
 160     if (bo == NULL) {
 161         return NULL;
 162     }
 163
 164     radeon_buffer = CALLOC_STRUCT(radeon_pipe_buffer);
 165     if (radeon_buffer == NULL) {
 166         radeon_bo_unref(bo);
 167         return NULL;
 168     }
 169
 170     pipe_reference_init(&radeon_buffer->base.reference, 1);
 171     radeon_buffer->base.screen = screen;
 172     radeon_buffer->base.usage = PIPE_BUFFER_USAGE_PIXEL;
 173     radeon_buffer->bo = bo;
 174     return &radeon_buffer->base;
 175 }
 176
 177 static struct pipe_texture*
 178 radeon_texture_from_shared_handle(struct drm_api *api,
 179                                   struct pipe_screen *screen,
 180                                   struct pipe_texture *templ,
 181                                   const char *name,
 182                                   unsigned stride,
 183                                   unsigned handle)
 184 {
 185     struct pipe_buffer *buffer;
 186     struct pipe_texture *blanket;
 187
 188     buffer = radeon_buffer_from_handle(api, screen, name, handle);
 189     if (!buffer) {
 190         return NULL;
 191     }
 192
 193     blanket = screen->texture_blanket(screen, templ, &stride, buffer);
 194
 195     pipe_buffer_reference(&buffer, NULL);
 196
 197     return blanket;
 198 }
 199
 200 static boolean radeon_shared_handle_from_texture(struct drm_api *api,
 201                                                  struct pipe_screen *screen,
 202                                                  struct pipe_texture *texture,
 203                                                  unsigned *stride,
 204                                                  unsigned *handle)
 205 {
 206     int retval, fd;
 207     struct drm_gem_flink flink;
 208     struct radeon_pipe_buffer* radeon_buffer;
 209     struct pipe_buffer *buffer = NULL;
 210
 211     if (!radeon_buffer_from_texture(api, texture, &buffer, stride)) {
 212         return FALSE;
 213     }
 214
 215     radeon_buffer = (struct radeon_pipe_buffer*)buffer;
 216     if (!radeon_buffer->flinked) {
 217         fd = ((struct radeon_winsys*)screen->winsys)->priv->fd;
 218
 219         flink.handle = radeon_buffer->bo->handle;
 220
 221         retval = ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink);
 222         if (retval) {
 223             debug_printf("radeon: DRM_IOCTL_GEM_FLINK failed, error %d\n",
 224                     retval);
 225             return FALSE;
 226         }
 227
 228         radeon_buffer->flink = flink.name;
 229         radeon_buffer->flinked = TRUE;
 230     }
 231
 232     *handle = radeon_buffer->flink;
 233     return TRUE;
 234 }
 235
 236 static boolean radeon_local_handle_from_texture(struct drm_api *api,
 237                                                 struct pipe_screen *screen,
 238                                                 struct pipe_texture *texture,
 239                                                 unsigned *stride,
 240                                                 unsigned *handle)
 241 {
 242     struct pipe_buffer *buffer = NULL;
 243     if (!radeon_buffer_from_texture(api, texture, &buffer, stride)) {
 244         return FALSE;
 245     }
 246
 247     *handle = ((struct radeon_pipe_buffer*)buffer)->bo->handle;
 248
 249     pipe_buffer_reference(&buffer, NULL);
 250
 251     return TRUE;
 252 }
 253
 254 struct drm_api drm_api_hooks = {
 255     .create_screen = radeon_create_screen,
 256     .create_context = radeon_create_context,
 257     .texture_from_shared_handle = radeon_texture_from_shared_handle,
 258     .shared_handle_from_texture = radeon_shared_handle_from_texture,
 259     .local_handle_from_texture = radeon_local_handle_from_texture,
 260 };
 261
 262 struct drm_api* drm_api_create()
 263 {
 264 #ifdef DEBUG
 265     return trace_drm_create(&drm_api_hooks);
 266 #else
 267     return &drm_api_hooks;
 268 #endif
 269 }