src/gallium/drivers/r300/r300_screen.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "util/u_format.h"
  25 #include "util/u_format_s3tc.h"
  26 #include "util/u_memory.h"
  27 #include "os/os_time.h"
  28 #include "vl/vl_decoder.h"
  29 #include "vl/vl_video_buffer.h"
  30
  31 #include "r300_context.h"
  32 #include "r300_texture.h"
  33 #include "r300_screen_buffer.h"
  34 #include "r300_state_inlines.h"
  35 #include "r300_public.h"
  36
  37 #include "draw/draw_context.h"
  38
  39 /* Return the identifier behind whom the brave coders responsible for this
  40  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  41  *
  42  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  43  *
  44  * (Or egotistical. Yet.) */
  45 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  46 {
  47     return "X.Org R300 Project";
  48 }
  49
  50 static const char* chip_families[] = {
  51     "ATI R300",
  52     "ATI R350",
  53     "ATI RV350",
  54     "ATI RV370",
  55     "ATI RV380",
  56     "ATI RS400",
  57     "ATI RC410",
  58     "ATI RS480",
  59     "ATI R420",
  60     "ATI R423",
  61     "ATI R430",
  62     "ATI R480",
  63     "ATI R481",
  64     "ATI RV410",
  65     "ATI RS600",
  66     "ATI RS690",
  67     "ATI RS740",
  68     "ATI RV515",
  69     "ATI R520",
  70     "ATI RV530",
  71     "ATI R580",
  72     "ATI RV560",
  73     "ATI RV570"
  74 };
  75
  76 static const char* r300_get_name(struct pipe_screen* pscreen)
  77 {
  78     struct r300_screen* r300screen = r300_screen(pscreen);
  79
  80     return chip_families[r300screen->caps.family];
  81 }
  82
  83 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  84 {
  85     struct r300_screen* r300screen = r300_screen(pscreen);
  86     boolean is_r500 = r300screen->caps.is_r500;
  87
  88     switch (param) {
  89         /* Supported features (boolean caps). */
  90         case PIPE_CAP_NPOT_TEXTURES:
  91         case PIPE_CAP_TWO_SIDED_STENCIL:
  92         case PIPE_CAP_ANISOTROPIC_FILTER:
  93         case PIPE_CAP_POINT_SPRITE:
  94         case PIPE_CAP_OCCLUSION_QUERY:
  95         case PIPE_CAP_TEXTURE_SHADOW_MAP:
  96         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  97         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  98         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
  99         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 100         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 101         case PIPE_CAP_CONDITIONAL_RENDER:
 102         case PIPE_CAP_TEXTURE_BARRIER:
 103         case PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS:
 104         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 105         case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 106             return 1;
 107
 108         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 109         case PIPE_CAP_TEXTURE_SWIZZLE:
 110             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 111
 112         /* Supported on r500 only. */
 113         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 114         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 115         case PIPE_CAP_SM3:
 116             return is_r500 ? 1 : 0;
 117
 118         /* Unsupported features. */
 119         case PIPE_CAP_TIMER_QUERY:
 120         case PIPE_CAP_DUAL_SOURCE_BLEND:
 121         case PIPE_CAP_INDEP_BLEND_ENABLE:
 122         case PIPE_CAP_INDEP_BLEND_FUNC:
 123         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 124         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 125         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 126         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 127         case PIPE_CAP_TGSI_INSTANCEID:
 128         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 129         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 130         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 131         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 132         case PIPE_CAP_SCALED_RESOLVE:
 133         case PIPE_CAP_MIN_TEXEL_OFFSET:
 134         case PIPE_CAP_MAX_TEXEL_OFFSET:
 135         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 136         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 137         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 138         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 139         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 140             return 0;
 141
 142         /* SWTCL-only features. */
 143         case PIPE_CAP_PRIMITIVE_RESTART:
 144             return !r300screen->caps.has_tcl;
 145
 146         /* Texturing. */
 147         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 148             return r300screen->caps.num_tex_units;
 149         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 150         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 151         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 152             /* 13 == 4096, 12 == 2048 */
 153             return is_r500 ? 13 : 12;
 154
 155         /* Render targets. */
 156         case PIPE_CAP_MAX_RENDER_TARGETS:
 157             return 4;
 158     }
 159     return 0;
 160 }
 161
 162 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 163 {
 164    struct r300_screen* r300screen = r300_screen(pscreen);
 165    boolean is_r400 = r300screen->caps.is_r400;
 166    boolean is_r500 = r300screen->caps.is_r500;
 167
 168    switch (shader) {
 169     case PIPE_SHADER_FRAGMENT:
 170         switch (param)
 171         {
 172         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 173             return is_r500 || is_r400 ? 512 : 96;
 174         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 175             return is_r500 || is_r400 ? 512 : 64;
 176         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 177             return is_r500 || is_r400 ? 512 : 32;
 178         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 179             return is_r500 ? 511 : 4;
 180         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 181             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 182             /* Fragment shader limits. */
 183         case PIPE_SHADER_CAP_MAX_INPUTS:
 184             /* 2 colors + 8 texcoords are always supported
 185              * (minus fog and wpos).
 186              *
 187              * R500 has the ability to turn 3rd and 4th color into
 188              * additional texcoords but there is no two-sided color
 189              * selection then. However the facing bit can be used instead. */
 190             return 10;
 191         case PIPE_SHADER_CAP_MAX_CONSTS:
 192             return is_r500 ? 256 : 32;
 193         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 194             return 1;
 195         case PIPE_SHADER_CAP_MAX_TEMPS:
 196             return is_r500 ? 128 : is_r400 ? 64 : 32;
 197         case PIPE_SHADER_CAP_MAX_PREDS:
 198             return is_r500 ? 1 : 0;
 199         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 200            return r300screen->caps.num_tex_units;
 201         case PIPE_SHADER_CAP_MAX_ADDRS:
 202         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 203         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 204         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 205         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 206         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 207         case PIPE_SHADER_CAP_SUBROUTINES:
 208         case PIPE_SHADER_CAP_INTEGERS:
 209         case PIPE_SHADER_CAP_OUTPUT_READ:
 210             return 0;
 211         }
 212         break;
 213     case PIPE_SHADER_VERTEX:
 214         switch (param)
 215         {
 216         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 217             return 0;
 218         default:;
 219         }
 220
 221         if (!r300screen->caps.has_tcl) {
 222             return draw_get_shader_param(shader, param);
 223         }
 224
 225         switch (param)
 226         {
 227         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 228         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 229             return is_r500 ? 1024 : 256;
 230         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 231             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 232         case PIPE_SHADER_CAP_MAX_INPUTS:
 233             return 16;
 234         case PIPE_SHADER_CAP_MAX_CONSTS:
 235             return 256;
 236         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 237             return 1;
 238         case PIPE_SHADER_CAP_MAX_TEMPS:
 239             return 32;
 240         case PIPE_SHADER_CAP_MAX_ADDRS:
 241             return 1; /* XXX guessed */
 242         case PIPE_SHADER_CAP_MAX_PREDS:
 243             return is_r500 ? 4 : 0; /* XXX guessed. */
 244         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 245             return 1;
 246         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 247         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 248         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 249         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 250         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 251         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 252         case PIPE_SHADER_CAP_SUBROUTINES:
 253         case PIPE_SHADER_CAP_INTEGERS:
 254         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 255         case PIPE_SHADER_CAP_OUTPUT_READ:
 256             return 0;
 257         }
 258         break;
 259     }
 260     return 0;
 261 }
 262
 263 static float r300_get_paramf(struct pipe_screen* pscreen,
 264                              enum pipe_capf param)
 265 {
 266     struct r300_screen* r300screen = r300_screen(pscreen);
 267
 268     switch (param) {
 269         case PIPE_CAPF_MAX_LINE_WIDTH:
 270         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 271         case PIPE_CAPF_MAX_POINT_WIDTH:
 272         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 273             /* The maximum dimensions of the colorbuffer are our practical
 274              * rendering limits. 2048 pixels should be enough for anybody. */
 275             if (r300screen->caps.is_r500) {
 276                 return 4096.0f;
 277             } else if (r300screen->caps.is_r400) {
 278                 return 4021.0f;
 279             } else {
 280                 return 2560.0f;
 281             }
 282         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 283             return 16.0f;
 284         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 285             return 16.0f;
 286         case PIPE_CAPF_GUARD_BAND_LEFT:
 287         case PIPE_CAPF_GUARD_BAND_TOP:
 288         case PIPE_CAPF_GUARD_BAND_RIGHT:
 289         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 290             /* XXX I don't know what these should be but the least we can do is
 291              * silence the potential error message */
 292             return 0.0f;
 293         default:
 294             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 295                          param);
 296             return 0.0f;
 297     }
 298 }
 299
 300 static int r300_get_video_param(struct pipe_screen *screen,
 301                                 enum pipe_video_profile profile,
 302                                 enum pipe_video_cap param)
 303 {
 304    switch (param) {
 305       case PIPE_VIDEO_CAP_SUPPORTED:
 306          return vl_profile_supported(screen, profile);
 307       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 308          return 0;
 309       case PIPE_VIDEO_CAP_MAX_WIDTH:
 310       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 311          return vl_video_buffer_max_size(screen);
 312       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 313          return PIPE_FORMAT_NV12;
 314       default:
 315          return 0;
 316    }
 317 }
 318
 319 static boolean r300_is_format_supported(struct pipe_screen* screen,
 320                                         enum pipe_format format,
 321                                         enum pipe_texture_target target,
 322                                         unsigned sample_count,
 323                                         unsigned usage)
 324 {
 325     uint32_t retval = 0;
 326     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 327     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 328     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 329     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 330                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 331                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 332                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 333     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 334                        format == PIPE_FORMAT_RGTC1_SNORM ||
 335                        format == PIPE_FORMAT_LATC1_UNORM ||
 336                        format == PIPE_FORMAT_LATC1_SNORM;
 337     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 338                        format == PIPE_FORMAT_RGTC2_SNORM ||
 339                        format == PIPE_FORMAT_LATC2_UNORM ||
 340                        format == PIPE_FORMAT_LATC2_SNORM;
 341     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 342                             format == PIPE_FORMAT_R16G16_FLOAT ||
 343                             format == PIPE_FORMAT_A16_FLOAT ||
 344                             format == PIPE_FORMAT_L16_FLOAT ||
 345                             format == PIPE_FORMAT_L16A16_FLOAT ||
 346                             format == PIPE_FORMAT_I16_FLOAT;
 347     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 348                             format == PIPE_FORMAT_R16G16_FLOAT ||
 349                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 350                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 351     boolean is_fixed = format == PIPE_FORMAT_R32_FIXED ||
 352                        format == PIPE_FORMAT_R32G32_FIXED ||
 353                        format == PIPE_FORMAT_R32G32B32_FIXED ||
 354                        format == PIPE_FORMAT_R32G32B32A32_FIXED;
 355
 356     if (!util_format_is_supported(format, usage))
 357        return FALSE;
 358
 359     /* Check multisampling support. */
 360     switch (sample_count) {
 361         case 0:
 362         case 1:
 363             break;
 364         case 2:
 365         case 3:
 366         case 4:
 367         case 6:
 368             return FALSE;
 369 #if 0
 370             if (usage != PIPE_BIND_RENDER_TARGET ||
 371                 !util_format_is_rgba8_variant(
 372                     util_format_description(format))) {
 373                 return FALSE;
 374             }
 375 #endif
 376             break;
 377         default:
 378             return FALSE;
 379     }
 380
 381     /* Check sampler format support. */
 382     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 383         /* ATI1N is r5xx-only. */
 384         (is_r500 || !is_ati1n) &&
 385         /* ATI2N is supported on r4xx-r5xx. */
 386         (is_r400 || is_r500 || !is_ati2n) &&
 387         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 388         (drm_2_8_0 || !is_x16f_xy16f) &&
 389         r300_is_sampler_format_supported(format)) {
 390         retval |= PIPE_BIND_SAMPLER_VIEW;
 391     }
 392
 393     /* Check colorbuffer format support. */
 394     if ((usage & (PIPE_BIND_RENDER_TARGET |
 395                   PIPE_BIND_DISPLAY_TARGET |
 396                   PIPE_BIND_SCANOUT |
 397                   PIPE_BIND_SHARED)) &&
 398         /* 2101010 cannot be rendered to on non-r5xx. */
 399         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 400         r300_is_colorbuffer_format_supported(format)) {
 401         retval |= usage &
 402             (PIPE_BIND_RENDER_TARGET |
 403              PIPE_BIND_DISPLAY_TARGET |
 404              PIPE_BIND_SCANOUT |
 405              PIPE_BIND_SHARED);
 406     }
 407
 408     /* Check depth-stencil format support. */
 409     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 410         r300_is_zs_format_supported(format)) {
 411         retval |= PIPE_BIND_DEPTH_STENCIL;
 412     }
 413
 414     /* Check vertex buffer format support. */
 415     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 416         /* Half float is supported on >= R400. */
 417         (is_r400 || is_r500 || !is_half_float) &&
 418         /* We have a fallback for FIXED. */
 419         (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) {
 420         retval |= PIPE_BIND_VERTEX_BUFFER;
 421     }
 422
 423     /* Transfers are always supported. */
 424     if (usage & PIPE_BIND_TRANSFER_READ)
 425         retval |= PIPE_BIND_TRANSFER_READ;
 426     if (usage & PIPE_BIND_TRANSFER_WRITE)
 427         retval |= PIPE_BIND_TRANSFER_WRITE;
 428
 429     return retval == usage;
 430 }
 431
 432 static void r300_destroy_screen(struct pipe_screen* pscreen)
 433 {
 434     struct r300_screen* r300screen = r300_screen(pscreen);
 435     struct radeon_winsys *rws = radeon_winsys(pscreen);
 436
 437     util_slab_destroy(&r300screen->pool_buffers);
 438     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 439
 440     if (rws)
 441       rws->destroy(rws);
 442
 443     FREE(r300screen);
 444 }
 445
 446 static void r300_fence_reference(struct pipe_screen *screen,
 447                                  struct pipe_fence_handle **ptr,
 448                                  struct pipe_fence_handle *fence)
 449 {
 450     pb_reference((struct pb_buffer**)ptr,
 451                              (struct pb_buffer*)fence);
 452 }
 453
 454 static boolean r300_fence_signalled(struct pipe_screen *screen,
 455                                     struct pipe_fence_handle *fence)
 456 {
 457     struct radeon_winsys *rws = r300_screen(screen)->rws;
 458     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 459
 460     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 461 }
 462
 463 static boolean r300_fence_finish(struct pipe_screen *screen,
 464                                  struct pipe_fence_handle *fence,
 465                                  uint64_t timeout)
 466 {
 467     struct radeon_winsys *rws = r300_screen(screen)->rws;
 468     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 469
 470     if (timeout != PIPE_TIMEOUT_INFINITE) {
 471         int64_t start_time = os_time_get();
 472
 473         /* Convert to microseconds. */
 474         timeout /= 1000;
 475
 476         /* Wait in a loop. */
 477         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 478             if (os_time_get() - start_time >= timeout) {
 479                 return FALSE;
 480             }
 481             os_time_sleep(10);
 482         }
 483         return TRUE;
 484     }
 485
 486     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 487     return TRUE;
 488 }
 489
 490 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 491 {
 492     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 493
 494     if (!r300screen) {
 495         FREE(r300screen);
 496         return NULL;
 497     }
 498
 499     rws->query_info(rws, &r300screen->info);
 500
 501     r300_init_debug(r300screen);
 502     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 503
 504     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 505         r300screen->caps.zmask_ram = 0;
 506     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 507         r300screen->caps.hiz_ram = 0;
 508
 509     if (r300screen->info.drm_minor < 8)
 510         r300screen->caps.has_us_format = FALSE;
 511
 512     pipe_mutex_init(r300screen->num_contexts_mutex);
 513
 514     util_slab_create(&r300screen->pool_buffers,
 515                      sizeof(struct r300_resource), 64,
 516                      UTIL_SLAB_SINGLETHREADED);
 517
 518     r300screen->rws = rws;
 519     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 520     r300screen->screen.destroy = r300_destroy_screen;
 521     r300screen->screen.get_name = r300_get_name;
 522     r300screen->screen.get_vendor = r300_get_vendor;
 523     r300screen->screen.get_param = r300_get_param;
 524     r300screen->screen.get_shader_param = r300_get_shader_param;
 525     r300screen->screen.get_paramf = r300_get_paramf;
 526     r300screen->screen.get_video_param = r300_get_video_param;
 527     r300screen->screen.is_format_supported = r300_is_format_supported;
 528     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 529     r300screen->screen.context_create = r300_create_context;
 530     r300screen->screen.fence_reference = r300_fence_reference;
 531     r300screen->screen.fence_signalled = r300_fence_signalled;
 532     r300screen->screen.fence_finish = r300_fence_finish;
 533
 534     r300_init_screen_resource_functions(r300screen);
 535
 536     util_format_s3tc_init();
 537
 538     return &r300screen->screen;
 539 }