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         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 144             return 0;
 145
 146         /* SWTCL-only features. */
 147         case PIPE_CAP_PRIMITIVE_RESTART:
 148             return !r300screen->caps.has_tcl;
 149
 150         /* Texturing. */
 151         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 152             return r300screen->caps.num_tex_units;
 153         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 154         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 155         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 156             /* 13 == 4096, 12 == 2048 */
 157             return is_r500 ? 13 : 12;
 158
 159         /* Render targets. */
 160         case PIPE_CAP_MAX_RENDER_TARGETS:
 161             return 4;
 162     }
 163     return 0;
 164 }
 165
 166 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 167 {
 168    struct r300_screen* r300screen = r300_screen(pscreen);
 169    boolean is_r400 = r300screen->caps.is_r400;
 170    boolean is_r500 = r300screen->caps.is_r500;
 171
 172    switch (shader) {
 173     case PIPE_SHADER_FRAGMENT:
 174         switch (param)
 175         {
 176         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 177             return is_r500 || is_r400 ? 512 : 96;
 178         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 179             return is_r500 || is_r400 ? 512 : 64;
 180         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 181             return is_r500 || is_r400 ? 512 : 32;
 182         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 183             return is_r500 ? 511 : 4;
 184         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 185             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 186             /* Fragment shader limits. */
 187         case PIPE_SHADER_CAP_MAX_INPUTS:
 188             /* 2 colors + 8 texcoords are always supported
 189              * (minus fog and wpos).
 190              *
 191              * R500 has the ability to turn 3rd and 4th color into
 192              * additional texcoords but there is no two-sided color
 193              * selection then. However the facing bit can be used instead. */
 194             return 10;
 195         case PIPE_SHADER_CAP_MAX_CONSTS:
 196             return is_r500 ? 256 : 32;
 197         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 198             return 1;
 199         case PIPE_SHADER_CAP_MAX_TEMPS:
 200             return is_r500 ? 128 : is_r400 ? 64 : 32;
 201         case PIPE_SHADER_CAP_MAX_PREDS:
 202             return is_r500 ? 1 : 0;
 203         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 204            return r300screen->caps.num_tex_units;
 205         case PIPE_SHADER_CAP_MAX_ADDRS:
 206         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 207         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 208         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 209         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 210         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 211         case PIPE_SHADER_CAP_SUBROUTINES:
 212         case PIPE_SHADER_CAP_INTEGERS:
 213         case PIPE_SHADER_CAP_OUTPUT_READ:
 214             return 0;
 215         }
 216         break;
 217     case PIPE_SHADER_VERTEX:
 218         switch (param)
 219         {
 220         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 221             return 0;
 222         default:;
 223         }
 224
 225         if (!r300screen->caps.has_tcl) {
 226             return draw_get_shader_param(shader, param);
 227         }
 228
 229         switch (param)
 230         {
 231         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 232         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 233             return is_r500 ? 1024 : 256;
 234         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 235             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 236         case PIPE_SHADER_CAP_MAX_INPUTS:
 237             return 16;
 238         case PIPE_SHADER_CAP_MAX_CONSTS:
 239             return 256;
 240         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 241             return 1;
 242         case PIPE_SHADER_CAP_MAX_TEMPS:
 243             return 32;
 244         case PIPE_SHADER_CAP_MAX_ADDRS:
 245             return 1; /* XXX guessed */
 246         case PIPE_SHADER_CAP_MAX_PREDS:
 247             return is_r500 ? 4 : 0; /* XXX guessed. */
 248         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 249             return 1;
 250         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 251         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 252         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 253         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 254         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 255         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 256         case PIPE_SHADER_CAP_SUBROUTINES:
 257         case PIPE_SHADER_CAP_INTEGERS:
 258         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 259         case PIPE_SHADER_CAP_OUTPUT_READ:
 260             return 0;
 261         }
 262         break;
 263     }
 264     return 0;
 265 }
 266
 267 static float r300_get_paramf(struct pipe_screen* pscreen,
 268                              enum pipe_capf param)
 269 {
 270     struct r300_screen* r300screen = r300_screen(pscreen);
 271
 272     switch (param) {
 273         case PIPE_CAPF_MAX_LINE_WIDTH:
 274         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 275         case PIPE_CAPF_MAX_POINT_WIDTH:
 276         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 277             /* The maximum dimensions of the colorbuffer are our practical
 278              * rendering limits. 2048 pixels should be enough for anybody. */
 279             if (r300screen->caps.is_r500) {
 280                 return 4096.0f;
 281             } else if (r300screen->caps.is_r400) {
 282                 return 4021.0f;
 283             } else {
 284                 return 2560.0f;
 285             }
 286         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 287             return 16.0f;
 288         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 289             return 16.0f;
 290         case PIPE_CAPF_GUARD_BAND_LEFT:
 291         case PIPE_CAPF_GUARD_BAND_TOP:
 292         case PIPE_CAPF_GUARD_BAND_RIGHT:
 293         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 294             /* XXX I don't know what these should be but the least we can do is
 295              * silence the potential error message */
 296             return 0.0f;
 297         default:
 298             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 299                          param);
 300             return 0.0f;
 301     }
 302 }
 303
 304 static int r300_get_video_param(struct pipe_screen *screen,
 305                                 enum pipe_video_profile profile,
 306                                 enum pipe_video_cap param)
 307 {
 308    switch (param) {
 309       case PIPE_VIDEO_CAP_SUPPORTED:
 310          return vl_profile_supported(screen, profile);
 311       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 312          return 0;
 313       case PIPE_VIDEO_CAP_MAX_WIDTH:
 314       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 315          return vl_video_buffer_max_size(screen);
 316       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 317          return PIPE_FORMAT_NV12;
 318       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 319          return false;
 320       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 321          return false;
 322       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 323          return true;
 324       default:
 325          return 0;
 326    }
 327 }
 328
 329 static boolean r300_is_format_supported(struct pipe_screen* screen,
 330                                         enum pipe_format format,
 331                                         enum pipe_texture_target target,
 332                                         unsigned sample_count,
 333                                         unsigned usage)
 334 {
 335     uint32_t retval = 0;
 336     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 337     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 338     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 339     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 340                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 341                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 342                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 343     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 344                        format == PIPE_FORMAT_RGTC1_SNORM ||
 345                        format == PIPE_FORMAT_LATC1_UNORM ||
 346                        format == PIPE_FORMAT_LATC1_SNORM;
 347     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 348                        format == PIPE_FORMAT_RGTC2_SNORM ||
 349                        format == PIPE_FORMAT_LATC2_UNORM ||
 350                        format == PIPE_FORMAT_LATC2_SNORM;
 351     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 352                             format == PIPE_FORMAT_R16G16_FLOAT ||
 353                             format == PIPE_FORMAT_A16_FLOAT ||
 354                             format == PIPE_FORMAT_L16_FLOAT ||
 355                             format == PIPE_FORMAT_L16A16_FLOAT ||
 356                             format == PIPE_FORMAT_I16_FLOAT;
 357     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 358                             format == PIPE_FORMAT_R16G16_FLOAT ||
 359                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 360                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 361     boolean is_fixed = format == PIPE_FORMAT_R32_FIXED ||
 362                        format == PIPE_FORMAT_R32G32_FIXED ||
 363                        format == PIPE_FORMAT_R32G32B32_FIXED ||
 364                        format == PIPE_FORMAT_R32G32B32A32_FIXED;
 365
 366     if (!util_format_is_supported(format, usage))
 367        return FALSE;
 368
 369     /* Check multisampling support. */
 370     switch (sample_count) {
 371         case 0:
 372         case 1:
 373             break;
 374         case 2:
 375         case 3:
 376         case 4:
 377         case 6:
 378             return FALSE;
 379 #if 0
 380             if (usage != PIPE_BIND_RENDER_TARGET ||
 381                 !util_format_is_rgba8_variant(
 382                     util_format_description(format))) {
 383                 return FALSE;
 384             }
 385 #endif
 386             break;
 387         default:
 388             return FALSE;
 389     }
 390
 391     /* Check sampler format support. */
 392     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 393         /* ATI1N is r5xx-only. */
 394         (is_r500 || !is_ati1n) &&
 395         /* ATI2N is supported on r4xx-r5xx. */
 396         (is_r400 || is_r500 || !is_ati2n) &&
 397         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 398         (drm_2_8_0 || !is_x16f_xy16f) &&
 399         r300_is_sampler_format_supported(format)) {
 400         retval |= PIPE_BIND_SAMPLER_VIEW;
 401     }
 402
 403     /* Check colorbuffer format support. */
 404     if ((usage & (PIPE_BIND_RENDER_TARGET |
 405                   PIPE_BIND_DISPLAY_TARGET |
 406                   PIPE_BIND_SCANOUT |
 407                   PIPE_BIND_SHARED)) &&
 408         /* 2101010 cannot be rendered to on non-r5xx. */
 409         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 410         r300_is_colorbuffer_format_supported(format)) {
 411         retval |= usage &
 412             (PIPE_BIND_RENDER_TARGET |
 413              PIPE_BIND_DISPLAY_TARGET |
 414              PIPE_BIND_SCANOUT |
 415              PIPE_BIND_SHARED);
 416     }
 417
 418     /* Check depth-stencil format support. */
 419     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 420         r300_is_zs_format_supported(format)) {
 421         retval |= PIPE_BIND_DEPTH_STENCIL;
 422     }
 423
 424     /* Check vertex buffer format support. */
 425     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 426         /* Half float is supported on >= R400. */
 427         (is_r400 || is_r500 || !is_half_float) &&
 428         /* We have a fallback for FIXED. */
 429         (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) {
 430         retval |= PIPE_BIND_VERTEX_BUFFER;
 431     }
 432
 433     /* Transfers are always supported. */
 434     if (usage & PIPE_BIND_TRANSFER_READ)
 435         retval |= PIPE_BIND_TRANSFER_READ;
 436     if (usage & PIPE_BIND_TRANSFER_WRITE)
 437         retval |= PIPE_BIND_TRANSFER_WRITE;
 438
 439     return retval == usage;
 440 }
 441
 442 static void r300_destroy_screen(struct pipe_screen* pscreen)
 443 {
 444     struct r300_screen* r300screen = r300_screen(pscreen);
 445     struct radeon_winsys *rws = radeon_winsys(pscreen);
 446
 447     util_slab_destroy(&r300screen->pool_buffers);
 448     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 449
 450     if (rws)
 451       rws->destroy(rws);
 452
 453     FREE(r300screen);
 454 }
 455
 456 static void r300_fence_reference(struct pipe_screen *screen,
 457                                  struct pipe_fence_handle **ptr,
 458                                  struct pipe_fence_handle *fence)
 459 {
 460     pb_reference((struct pb_buffer**)ptr,
 461                              (struct pb_buffer*)fence);
 462 }
 463
 464 static boolean r300_fence_signalled(struct pipe_screen *screen,
 465                                     struct pipe_fence_handle *fence)
 466 {
 467     struct radeon_winsys *rws = r300_screen(screen)->rws;
 468     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 469
 470     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 471 }
 472
 473 static boolean r300_fence_finish(struct pipe_screen *screen,
 474                                  struct pipe_fence_handle *fence,
 475                                  uint64_t timeout)
 476 {
 477     struct radeon_winsys *rws = r300_screen(screen)->rws;
 478     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 479
 480     if (timeout != PIPE_TIMEOUT_INFINITE) {
 481         int64_t start_time = os_time_get();
 482
 483         /* Convert to microseconds. */
 484         timeout /= 1000;
 485
 486         /* Wait in a loop. */
 487         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 488             if (os_time_get() - start_time >= timeout) {
 489                 return FALSE;
 490             }
 491             os_time_sleep(10);
 492         }
 493         return TRUE;
 494     }
 495
 496     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 497     return TRUE;
 498 }
 499
 500 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 501 {
 502     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 503
 504     if (!r300screen) {
 505         FREE(r300screen);
 506         return NULL;
 507     }
 508
 509     rws->query_info(rws, &r300screen->info);
 510
 511     r300_init_debug(r300screen);
 512     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 513
 514     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 515         r300screen->caps.zmask_ram = 0;
 516     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 517         r300screen->caps.hiz_ram = 0;
 518
 519     if (r300screen->info.drm_minor < 8)
 520         r300screen->caps.has_us_format = FALSE;
 521
 522     pipe_mutex_init(r300screen->num_contexts_mutex);
 523
 524     util_slab_create(&r300screen->pool_buffers,
 525                      sizeof(struct r300_resource), 64,
 526                      UTIL_SLAB_SINGLETHREADED);
 527
 528     r300screen->rws = rws;
 529     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 530     r300screen->screen.destroy = r300_destroy_screen;
 531     r300screen->screen.get_name = r300_get_name;
 532     r300screen->screen.get_vendor = r300_get_vendor;
 533     r300screen->screen.get_param = r300_get_param;
 534     r300screen->screen.get_shader_param = r300_get_shader_param;
 535     r300screen->screen.get_paramf = r300_get_paramf;
 536     r300screen->screen.get_video_param = r300_get_video_param;
 537     r300screen->screen.is_format_supported = r300_is_format_supported;
 538     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 539     r300screen->screen.context_create = r300_create_context;
 540     r300screen->screen.fence_reference = r300_fence_reference;
 541     r300screen->screen.fence_signalled = r300_fence_signalled;
 542     r300screen->screen.fence_finish = r300_fence_finish;
 543
 544     r300_init_screen_resource_functions(r300screen);
 545
 546     util_format_s3tc_init();
 547
 548     return &r300screen->screen;
 549 }