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         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 109             return 120;
 110
 111         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 112         case PIPE_CAP_TEXTURE_SWIZZLE:
 113             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 114
 115         /* Supported on r500 only. */
 116         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 117         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 118         case PIPE_CAP_SM3:
 119             return is_r500 ? 1 : 0;
 120
 121         /* Unsupported features. */
 122         case PIPE_CAP_TIMER_QUERY:
 123         case PIPE_CAP_DUAL_SOURCE_BLEND:
 124         case PIPE_CAP_INDEP_BLEND_ENABLE:
 125         case PIPE_CAP_INDEP_BLEND_FUNC:
 126         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 127         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 128         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 129         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 130         case PIPE_CAP_TGSI_INSTANCEID:
 131         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 132         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 133         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 134         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 135         case PIPE_CAP_SCALED_RESOLVE:
 136         case PIPE_CAP_MIN_TEXEL_OFFSET:
 137         case PIPE_CAP_MAX_TEXEL_OFFSET:
 138         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 139         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 140         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 141         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 142         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 143             return 0;
 144
 145         /* SWTCL-only features. */
 146         case PIPE_CAP_PRIMITIVE_RESTART:
 147             return !r300screen->caps.has_tcl;
 148
 149         /* Texturing. */
 150         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 151             return r300screen->caps.num_tex_units;
 152         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 153         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 154         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 155             /* 13 == 4096, 12 == 2048 */
 156             return is_r500 ? 13 : 12;
 157
 158         /* Render targets. */
 159         case PIPE_CAP_MAX_RENDER_TARGETS:
 160             return 4;
 161     }
 162     return 0;
 163 }
 164
 165 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 166 {
 167    struct r300_screen* r300screen = r300_screen(pscreen);
 168    boolean is_r400 = r300screen->caps.is_r400;
 169    boolean is_r500 = r300screen->caps.is_r500;
 170
 171    switch (shader) {
 172     case PIPE_SHADER_FRAGMENT:
 173         switch (param)
 174         {
 175         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 176             return is_r500 || is_r400 ? 512 : 96;
 177         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 178             return is_r500 || is_r400 ? 512 : 64;
 179         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 180             return is_r500 || is_r400 ? 512 : 32;
 181         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 182             return is_r500 ? 511 : 4;
 183         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 184             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 185             /* Fragment shader limits. */
 186         case PIPE_SHADER_CAP_MAX_INPUTS:
 187             /* 2 colors + 8 texcoords are always supported
 188              * (minus fog and wpos).
 189              *
 190              * R500 has the ability to turn 3rd and 4th color into
 191              * additional texcoords but there is no two-sided color
 192              * selection then. However the facing bit can be used instead. */
 193             return 10;
 194         case PIPE_SHADER_CAP_MAX_CONSTS:
 195             return is_r500 ? 256 : 32;
 196         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 197             return 1;
 198         case PIPE_SHADER_CAP_MAX_TEMPS:
 199             return is_r500 ? 128 : is_r400 ? 64 : 32;
 200         case PIPE_SHADER_CAP_MAX_PREDS:
 201             return is_r500 ? 1 : 0;
 202         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 203            return r300screen->caps.num_tex_units;
 204         case PIPE_SHADER_CAP_MAX_ADDRS:
 205         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 206         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 207         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 208         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 209         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 210         case PIPE_SHADER_CAP_SUBROUTINES:
 211         case PIPE_SHADER_CAP_INTEGERS:
 212         case PIPE_SHADER_CAP_OUTPUT_READ:
 213             return 0;
 214         }
 215         break;
 216     case PIPE_SHADER_VERTEX:
 217         switch (param)
 218         {
 219         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 220             return 0;
 221         default:;
 222         }
 223
 224         if (!r300screen->caps.has_tcl) {
 225             return draw_get_shader_param(shader, param);
 226         }
 227
 228         switch (param)
 229         {
 230         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 231         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 232             return is_r500 ? 1024 : 256;
 233         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 234             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 235         case PIPE_SHADER_CAP_MAX_INPUTS:
 236             return 16;
 237         case PIPE_SHADER_CAP_MAX_CONSTS:
 238             return 256;
 239         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 240             return 1;
 241         case PIPE_SHADER_CAP_MAX_TEMPS:
 242             return 32;
 243         case PIPE_SHADER_CAP_MAX_ADDRS:
 244             return 1; /* XXX guessed */
 245         case PIPE_SHADER_CAP_MAX_PREDS:
 246             return is_r500 ? 4 : 0; /* XXX guessed. */
 247         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 248             return 1;
 249         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 250         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 251         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 252         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 253         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 254         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 255         case PIPE_SHADER_CAP_SUBROUTINES:
 256         case PIPE_SHADER_CAP_INTEGERS:
 257         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 258         case PIPE_SHADER_CAP_OUTPUT_READ:
 259             return 0;
 260         }
 261         break;
 262     }
 263     return 0;
 264 }
 265
 266 static float r300_get_paramf(struct pipe_screen* pscreen,
 267                              enum pipe_capf param)
 268 {
 269     struct r300_screen* r300screen = r300_screen(pscreen);
 270
 271     switch (param) {
 272         case PIPE_CAPF_MAX_LINE_WIDTH:
 273         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 274         case PIPE_CAPF_MAX_POINT_WIDTH:
 275         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 276             /* The maximum dimensions of the colorbuffer are our practical
 277              * rendering limits. 2048 pixels should be enough for anybody. */
 278             if (r300screen->caps.is_r500) {
 279                 return 4096.0f;
 280             } else if (r300screen->caps.is_r400) {
 281                 return 4021.0f;
 282             } else {
 283                 return 2560.0f;
 284             }
 285         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 286             return 16.0f;
 287         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 288             return 16.0f;
 289         case PIPE_CAPF_GUARD_BAND_LEFT:
 290         case PIPE_CAPF_GUARD_BAND_TOP:
 291         case PIPE_CAPF_GUARD_BAND_RIGHT:
 292         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 293             /* XXX I don't know what these should be but the least we can do is
 294              * silence the potential error message */
 295             return 0.0f;
 296         default:
 297             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 298                          param);
 299             return 0.0f;
 300     }
 301 }
 302
 303 static int r300_get_video_param(struct pipe_screen *screen,
 304                                 enum pipe_video_profile profile,
 305                                 enum pipe_video_cap param)
 306 {
 307    switch (param) {
 308       case PIPE_VIDEO_CAP_SUPPORTED:
 309          return vl_profile_supported(screen, profile);
 310       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 311          return 0;
 312       case PIPE_VIDEO_CAP_MAX_WIDTH:
 313       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 314          return vl_video_buffer_max_size(screen);
 315       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 316          return PIPE_FORMAT_NV12;
 317       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 318          return false;
 319       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 320          return false;
 321       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 322          return true;
 323       default:
 324          return 0;
 325    }
 326 }
 327
 328 static boolean r300_is_format_supported(struct pipe_screen* screen,
 329                                         enum pipe_format format,
 330                                         enum pipe_texture_target target,
 331                                         unsigned sample_count,
 332                                         unsigned usage)
 333 {
 334     uint32_t retval = 0;
 335     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 336     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 337     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 338     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 339                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 340                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 341                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 342     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 343                        format == PIPE_FORMAT_RGTC1_SNORM ||
 344                        format == PIPE_FORMAT_LATC1_UNORM ||
 345                        format == PIPE_FORMAT_LATC1_SNORM;
 346     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 347                        format == PIPE_FORMAT_RGTC2_SNORM ||
 348                        format == PIPE_FORMAT_LATC2_UNORM ||
 349                        format == PIPE_FORMAT_LATC2_SNORM;
 350     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 351                             format == PIPE_FORMAT_R16G16_FLOAT ||
 352                             format == PIPE_FORMAT_A16_FLOAT ||
 353                             format == PIPE_FORMAT_L16_FLOAT ||
 354                             format == PIPE_FORMAT_L16A16_FLOAT ||
 355                             format == PIPE_FORMAT_I16_FLOAT;
 356     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 357                             format == PIPE_FORMAT_R16G16_FLOAT ||
 358                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 359                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 360     boolean is_fixed = format == PIPE_FORMAT_R32_FIXED ||
 361                        format == PIPE_FORMAT_R32G32_FIXED ||
 362                        format == PIPE_FORMAT_R32G32B32_FIXED ||
 363                        format == PIPE_FORMAT_R32G32B32A32_FIXED;
 364
 365     if (!util_format_is_supported(format, usage))
 366        return FALSE;
 367
 368     /* Check multisampling support. */
 369     switch (sample_count) {
 370         case 0:
 371         case 1:
 372             break;
 373         case 2:
 374         case 3:
 375         case 4:
 376         case 6:
 377             return FALSE;
 378 #if 0
 379             if (usage != PIPE_BIND_RENDER_TARGET ||
 380                 !util_format_is_rgba8_variant(
 381                     util_format_description(format))) {
 382                 return FALSE;
 383             }
 384 #endif
 385             break;
 386         default:
 387             return FALSE;
 388     }
 389
 390     /* Check sampler format support. */
 391     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 392         /* ATI1N is r5xx-only. */
 393         (is_r500 || !is_ati1n) &&
 394         /* ATI2N is supported on r4xx-r5xx. */
 395         (is_r400 || is_r500 || !is_ati2n) &&
 396         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 397         (drm_2_8_0 || !is_x16f_xy16f) &&
 398         r300_is_sampler_format_supported(format)) {
 399         retval |= PIPE_BIND_SAMPLER_VIEW;
 400     }
 401
 402     /* Check colorbuffer format support. */
 403     if ((usage & (PIPE_BIND_RENDER_TARGET |
 404                   PIPE_BIND_DISPLAY_TARGET |
 405                   PIPE_BIND_SCANOUT |
 406                   PIPE_BIND_SHARED)) &&
 407         /* 2101010 cannot be rendered to on non-r5xx. */
 408         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 409         r300_is_colorbuffer_format_supported(format)) {
 410         retval |= usage &
 411             (PIPE_BIND_RENDER_TARGET |
 412              PIPE_BIND_DISPLAY_TARGET |
 413              PIPE_BIND_SCANOUT |
 414              PIPE_BIND_SHARED);
 415     }
 416
 417     /* Check depth-stencil format support. */
 418     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 419         r300_is_zs_format_supported(format)) {
 420         retval |= PIPE_BIND_DEPTH_STENCIL;
 421     }
 422
 423     /* Check vertex buffer format support. */
 424     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 425         /* Half float is supported on >= R400. */
 426         (is_r400 || is_r500 || !is_half_float) &&
 427         /* We have a fallback for FIXED. */
 428         (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) {
 429         retval |= PIPE_BIND_VERTEX_BUFFER;
 430     }
 431
 432     /* Transfers are always supported. */
 433     if (usage & PIPE_BIND_TRANSFER_READ)
 434         retval |= PIPE_BIND_TRANSFER_READ;
 435     if (usage & PIPE_BIND_TRANSFER_WRITE)
 436         retval |= PIPE_BIND_TRANSFER_WRITE;
 437
 438     return retval == usage;
 439 }
 440
 441 static void r300_destroy_screen(struct pipe_screen* pscreen)
 442 {
 443     struct r300_screen* r300screen = r300_screen(pscreen);
 444     struct radeon_winsys *rws = radeon_winsys(pscreen);
 445
 446     util_slab_destroy(&r300screen->pool_buffers);
 447     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 448
 449     if (rws)
 450       rws->destroy(rws);
 451
 452     FREE(r300screen);
 453 }
 454
 455 static void r300_fence_reference(struct pipe_screen *screen,
 456                                  struct pipe_fence_handle **ptr,
 457                                  struct pipe_fence_handle *fence)
 458 {
 459     pb_reference((struct pb_buffer**)ptr,
 460                              (struct pb_buffer*)fence);
 461 }
 462
 463 static boolean r300_fence_signalled(struct pipe_screen *screen,
 464                                     struct pipe_fence_handle *fence)
 465 {
 466     struct radeon_winsys *rws = r300_screen(screen)->rws;
 467     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 468
 469     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 470 }
 471
 472 static boolean r300_fence_finish(struct pipe_screen *screen,
 473                                  struct pipe_fence_handle *fence,
 474                                  uint64_t timeout)
 475 {
 476     struct radeon_winsys *rws = r300_screen(screen)->rws;
 477     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 478
 479     if (timeout != PIPE_TIMEOUT_INFINITE) {
 480         int64_t start_time = os_time_get();
 481
 482         /* Convert to microseconds. */
 483         timeout /= 1000;
 484
 485         /* Wait in a loop. */
 486         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 487             if (os_time_get() - start_time >= timeout) {
 488                 return FALSE;
 489             }
 490             os_time_sleep(10);
 491         }
 492         return TRUE;
 493     }
 494
 495     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 496     return TRUE;
 497 }
 498
 499 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 500 {
 501     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 502
 503     if (!r300screen) {
 504         FREE(r300screen);
 505         return NULL;
 506     }
 507
 508     rws->query_info(rws, &r300screen->info);
 509
 510     r300_init_debug(r300screen);
 511     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 512
 513     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 514         r300screen->caps.zmask_ram = 0;
 515     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 516         r300screen->caps.hiz_ram = 0;
 517
 518     if (r300screen->info.drm_minor < 8)
 519         r300screen->caps.has_us_format = FALSE;
 520
 521     pipe_mutex_init(r300screen->num_contexts_mutex);
 522
 523     util_slab_create(&r300screen->pool_buffers,
 524                      sizeof(struct r300_resource), 64,
 525                      UTIL_SLAB_SINGLETHREADED);
 526
 527     r300screen->rws = rws;
 528     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 529     r300screen->screen.destroy = r300_destroy_screen;
 530     r300screen->screen.get_name = r300_get_name;
 531     r300screen->screen.get_vendor = r300_get_vendor;
 532     r300screen->screen.get_param = r300_get_param;
 533     r300screen->screen.get_shader_param = r300_get_shader_param;
 534     r300screen->screen.get_paramf = r300_get_paramf;
 535     r300screen->screen.get_video_param = r300_get_video_param;
 536     r300screen->screen.is_format_supported = r300_is_format_supported;
 537     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 538     r300screen->screen.context_create = r300_create_context;
 539     r300screen->screen.fence_reference = r300_fence_reference;
 540     r300screen->screen.fence_signalled = r300_fence_signalled;
 541     r300screen->screen.fence_finish = r300_fence_finish;
 542
 543     r300_init_screen_resource_functions(r300screen);
 544
 545     util_format_s3tc_init();
 546
 547     return &r300screen->screen;
 548 }