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         case PIPE_CAP_USER_INDEX_BUFFERS:
 107         case PIPE_CAP_USER_CONSTANT_BUFFERS:
 108             return 1;
 109
 110         case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 111             return 16;
 112
 113         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 114             return 120;
 115
 116         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 117         case PIPE_CAP_TEXTURE_SWIZZLE:
 118             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 119
 120         /* Supported on r500 only. */
 121         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 122         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 123         case PIPE_CAP_SM3:
 124             return is_r500 ? 1 : 0;
 125
 126         /* Unsupported features. */
 127         case PIPE_CAP_TIMER_QUERY:
 128         case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 129         case PIPE_CAP_INDEP_BLEND_ENABLE:
 130         case PIPE_CAP_INDEP_BLEND_FUNC:
 131         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 132         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 133         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 134         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 135         case PIPE_CAP_TGSI_INSTANCEID:
 136         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 137         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 138         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 139         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 140         case PIPE_CAP_SCALED_RESOLVE:
 141         case PIPE_CAP_MIN_TEXEL_OFFSET:
 142         case PIPE_CAP_MAX_TEXEL_OFFSET:
 143         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 144         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 145         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 146         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 147         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 148         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 149         case PIPE_CAP_COMPUTE:
 150             return 0;
 151
 152         /* SWTCL-only features. */
 153         case PIPE_CAP_PRIMITIVE_RESTART:
 154         case PIPE_CAP_USER_VERTEX_BUFFERS:
 155             return !r300screen->caps.has_tcl;
 156
 157         /* HWTCL-only features / limitations. */
 158         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 159         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 160         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 161             return r300screen->caps.has_tcl;
 162
 163         /* Texturing. */
 164         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 165             return r300screen->caps.num_tex_units;
 166         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 167         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 168         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 169             /* 13 == 4096, 12 == 2048 */
 170             return is_r500 ? 13 : 12;
 171
 172         /* Render targets. */
 173         case PIPE_CAP_MAX_RENDER_TARGETS:
 174             return 4;
 175     }
 176     return 0;
 177 }
 178
 179 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 180 {
 181    struct r300_screen* r300screen = r300_screen(pscreen);
 182    boolean is_r400 = r300screen->caps.is_r400;
 183    boolean is_r500 = r300screen->caps.is_r500;
 184
 185    switch (shader) {
 186     case PIPE_SHADER_FRAGMENT:
 187         switch (param)
 188         {
 189         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 190             return is_r500 || is_r400 ? 512 : 96;
 191         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 192             return is_r500 || is_r400 ? 512 : 64;
 193         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 194             return is_r500 || is_r400 ? 512 : 32;
 195         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 196             return is_r500 ? 511 : 4;
 197         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 198             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 199             /* Fragment shader limits. */
 200         case PIPE_SHADER_CAP_MAX_INPUTS:
 201             /* 2 colors + 8 texcoords are always supported
 202              * (minus fog and wpos).
 203              *
 204              * R500 has the ability to turn 3rd and 4th color into
 205              * additional texcoords but there is no two-sided color
 206              * selection then. However the facing bit can be used instead. */
 207             return 10;
 208         case PIPE_SHADER_CAP_MAX_CONSTS:
 209             return is_r500 ? 256 : 32;
 210         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 211             return 1;
 212         case PIPE_SHADER_CAP_MAX_TEMPS:
 213             return is_r500 ? 128 : is_r400 ? 64 : 32;
 214         case PIPE_SHADER_CAP_MAX_PREDS:
 215             return is_r500 ? 1 : 0;
 216         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 217            return r300screen->caps.num_tex_units;
 218         case PIPE_SHADER_CAP_MAX_ADDRS:
 219         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 220         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 221         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 222         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 223         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 224         case PIPE_SHADER_CAP_SUBROUTINES:
 225         case PIPE_SHADER_CAP_INTEGERS:
 226             return 0;
 227         case PIPE_SHADER_CAP_PREFERRED_IR:
 228             return PIPE_SHADER_IR_TGSI;
 229         }
 230         break;
 231     case PIPE_SHADER_VERTEX:
 232         switch (param)
 233         {
 234         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 235         case PIPE_SHADER_CAP_SUBROUTINES:
 236             return 0;
 237         default:;
 238         }
 239
 240         if (!r300screen->caps.has_tcl) {
 241             return draw_get_shader_param(shader, param);
 242         }
 243
 244         switch (param)
 245         {
 246         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 247         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 248             return is_r500 ? 1024 : 256;
 249         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 250             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 251         case PIPE_SHADER_CAP_MAX_INPUTS:
 252             return 16;
 253         case PIPE_SHADER_CAP_MAX_CONSTS:
 254             return 256;
 255         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 256             return 1;
 257         case PIPE_SHADER_CAP_MAX_TEMPS:
 258             return 32;
 259         case PIPE_SHADER_CAP_MAX_ADDRS:
 260             return 1; /* XXX guessed */
 261         case PIPE_SHADER_CAP_MAX_PREDS:
 262             return is_r500 ? 4 : 0; /* XXX guessed. */
 263         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 264             return 1;
 265         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 266         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 267         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 268         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 269         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 270         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 271         case PIPE_SHADER_CAP_SUBROUTINES:
 272         case PIPE_SHADER_CAP_INTEGERS:
 273         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 274             return 0;
 275         case PIPE_SHADER_CAP_PREFERRED_IR:
 276             return PIPE_SHADER_IR_TGSI;
 277         }
 278         break;
 279     }
 280     return 0;
 281 }
 282
 283 static float r300_get_paramf(struct pipe_screen* pscreen,
 284                              enum pipe_capf param)
 285 {
 286     struct r300_screen* r300screen = r300_screen(pscreen);
 287
 288     switch (param) {
 289         case PIPE_CAPF_MAX_LINE_WIDTH:
 290         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 291         case PIPE_CAPF_MAX_POINT_WIDTH:
 292         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 293             /* The maximum dimensions of the colorbuffer are our practical
 294              * rendering limits. 2048 pixels should be enough for anybody. */
 295             if (r300screen->caps.is_r500) {
 296                 return 4096.0f;
 297             } else if (r300screen->caps.is_r400) {
 298                 return 4021.0f;
 299             } else {
 300                 return 2560.0f;
 301             }
 302         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 303             return 16.0f;
 304         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 305             return 16.0f;
 306         case PIPE_CAPF_GUARD_BAND_LEFT:
 307         case PIPE_CAPF_GUARD_BAND_TOP:
 308         case PIPE_CAPF_GUARD_BAND_RIGHT:
 309         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 310             /* XXX I don't know what these should be but the least we can do is
 311              * silence the potential error message */
 312             return 0.0f;
 313         default:
 314             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 315                          param);
 316             return 0.0f;
 317     }
 318 }
 319
 320 static int r300_get_video_param(struct pipe_screen *screen,
 321                                 enum pipe_video_profile profile,
 322                                 enum pipe_video_cap param)
 323 {
 324    switch (param) {
 325       case PIPE_VIDEO_CAP_SUPPORTED:
 326          return vl_profile_supported(screen, profile);
 327       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 328          return 0;
 329       case PIPE_VIDEO_CAP_MAX_WIDTH:
 330       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 331          return vl_video_buffer_max_size(screen);
 332       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 333          return PIPE_FORMAT_NV12;
 334       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 335          return false;
 336       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 337          return false;
 338       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 339          return true;
 340       default:
 341          return 0;
 342    }
 343 }
 344
 345 static boolean r300_is_format_supported(struct pipe_screen* screen,
 346                                         enum pipe_format format,
 347                                         enum pipe_texture_target target,
 348                                         unsigned sample_count,
 349                                         unsigned usage)
 350 {
 351     uint32_t retval = 0;
 352     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 353     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 354     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 355     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 356                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 357                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 358                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 359     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 360                        format == PIPE_FORMAT_RGTC1_SNORM ||
 361                        format == PIPE_FORMAT_LATC1_UNORM ||
 362                        format == PIPE_FORMAT_LATC1_SNORM;
 363     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 364                        format == PIPE_FORMAT_RGTC2_SNORM ||
 365                        format == PIPE_FORMAT_LATC2_UNORM ||
 366                        format == PIPE_FORMAT_LATC2_SNORM;
 367     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 368                             format == PIPE_FORMAT_R16G16_FLOAT ||
 369                             format == PIPE_FORMAT_A16_FLOAT ||
 370                             format == PIPE_FORMAT_L16_FLOAT ||
 371                             format == PIPE_FORMAT_L16A16_FLOAT ||
 372                             format == PIPE_FORMAT_I16_FLOAT;
 373     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 374                             format == PIPE_FORMAT_R16G16_FLOAT ||
 375                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 376                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 377
 378     if (!util_format_is_supported(format, usage))
 379        return FALSE;
 380
 381     /* Check multisampling support. */
 382     switch (sample_count) {
 383         case 0:
 384         case 1:
 385             break;
 386         case 2:
 387         case 3:
 388         case 4:
 389         case 6:
 390             return FALSE;
 391 #if 0
 392             if (usage != PIPE_BIND_RENDER_TARGET ||
 393                 !util_format_is_rgba8_variant(
 394                     util_format_description(format))) {
 395                 return FALSE;
 396             }
 397 #endif
 398             break;
 399         default:
 400             return FALSE;
 401     }
 402
 403     /* Check sampler format support. */
 404     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 405         /* ATI1N is r5xx-only. */
 406         (is_r500 || !is_ati1n) &&
 407         /* ATI2N is supported on r4xx-r5xx. */
 408         (is_r400 || is_r500 || !is_ati2n) &&
 409         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 410         (drm_2_8_0 || !is_x16f_xy16f) &&
 411         r300_is_sampler_format_supported(format)) {
 412         retval |= PIPE_BIND_SAMPLER_VIEW;
 413     }
 414
 415     /* Check colorbuffer format support. */
 416     if ((usage & (PIPE_BIND_RENDER_TARGET |
 417                   PIPE_BIND_DISPLAY_TARGET |
 418                   PIPE_BIND_SCANOUT |
 419                   PIPE_BIND_SHARED)) &&
 420         /* 2101010 cannot be rendered to on non-r5xx. */
 421         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 422         r300_is_colorbuffer_format_supported(format)) {
 423         retval |= usage &
 424             (PIPE_BIND_RENDER_TARGET |
 425              PIPE_BIND_DISPLAY_TARGET |
 426              PIPE_BIND_SCANOUT |
 427              PIPE_BIND_SHARED);
 428     }
 429
 430     /* Check depth-stencil format support. */
 431     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 432         r300_is_zs_format_supported(format)) {
 433         retval |= PIPE_BIND_DEPTH_STENCIL;
 434     }
 435
 436     /* Check vertex buffer format support. */
 437     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 438         if (r300_screen(screen)->caps.has_tcl) {
 439             /* Half float is supported on >= R400. */
 440             if ((is_r400 || is_r500 || !is_half_float) &&
 441                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 442                 retval |= PIPE_BIND_VERTEX_BUFFER;
 443             }
 444         } else {
 445             /* SW TCL */
 446             if (!util_format_is_pure_integer(format)) {
 447                 retval |= PIPE_BIND_VERTEX_BUFFER;
 448             }
 449         }
 450     }
 451
 452     /* Transfers are always supported. */
 453     if (usage & PIPE_BIND_TRANSFER_READ)
 454         retval |= PIPE_BIND_TRANSFER_READ;
 455     if (usage & PIPE_BIND_TRANSFER_WRITE)
 456         retval |= PIPE_BIND_TRANSFER_WRITE;
 457
 458     return retval == usage;
 459 }
 460
 461 static void r300_destroy_screen(struct pipe_screen* pscreen)
 462 {
 463     struct r300_screen* r300screen = r300_screen(pscreen);
 464     struct radeon_winsys *rws = radeon_winsys(pscreen);
 465
 466     if (rws)
 467       rws->destroy(rws);
 468
 469     FREE(r300screen);
 470 }
 471
 472 static void r300_fence_reference(struct pipe_screen *screen,
 473                                  struct pipe_fence_handle **ptr,
 474                                  struct pipe_fence_handle *fence)
 475 {
 476     pb_reference((struct pb_buffer**)ptr,
 477                              (struct pb_buffer*)fence);
 478 }
 479
 480 static boolean r300_fence_signalled(struct pipe_screen *screen,
 481                                     struct pipe_fence_handle *fence)
 482 {
 483     struct radeon_winsys *rws = r300_screen(screen)->rws;
 484     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 485
 486     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 487 }
 488
 489 static boolean r300_fence_finish(struct pipe_screen *screen,
 490                                  struct pipe_fence_handle *fence,
 491                                  uint64_t timeout)
 492 {
 493     struct radeon_winsys *rws = r300_screen(screen)->rws;
 494     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 495
 496     if (timeout != PIPE_TIMEOUT_INFINITE) {
 497         int64_t start_time = os_time_get();
 498
 499         /* Convert to microseconds. */
 500         timeout /= 1000;
 501
 502         /* Wait in a loop. */
 503         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 504             if (os_time_get() - start_time >= timeout) {
 505                 return FALSE;
 506             }
 507             os_time_sleep(10);
 508         }
 509         return TRUE;
 510     }
 511
 512     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 513     return TRUE;
 514 }
 515
 516 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 517 {
 518     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 519
 520     if (!r300screen) {
 521         FREE(r300screen);
 522         return NULL;
 523     }
 524
 525     rws->query_info(rws, &r300screen->info);
 526
 527     r300_init_debug(r300screen);
 528     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 529
 530     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 531         r300screen->caps.zmask_ram = 0;
 532     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 533         r300screen->caps.hiz_ram = 0;
 534
 535     if (r300screen->info.drm_minor < 8)
 536         r300screen->caps.has_us_format = FALSE;
 537
 538     r300screen->rws = rws;
 539     r300screen->screen.destroy = r300_destroy_screen;
 540     r300screen->screen.get_name = r300_get_name;
 541     r300screen->screen.get_vendor = r300_get_vendor;
 542     r300screen->screen.get_param = r300_get_param;
 543     r300screen->screen.get_shader_param = r300_get_shader_param;
 544     r300screen->screen.get_paramf = r300_get_paramf;
 545     r300screen->screen.get_video_param = r300_get_video_param;
 546     r300screen->screen.is_format_supported = r300_is_format_supported;
 547     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 548     r300screen->screen.context_create = r300_create_context;
 549     r300screen->screen.fence_reference = r300_fence_reference;
 550     r300screen->screen.fence_signalled = r300_fence_signalled;
 551     r300screen->screen.fence_finish = r300_fence_finish;
 552
 553     r300_init_screen_resource_functions(r300screen);
 554
 555     util_format_s3tc_init();
 556
 557     return &r300screen->screen;
 558 }