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     "unknown",
  52     "ATI R300",
  53     "ATI R350",
  54     "ATI RV350",
  55     "ATI RV370",
  56     "ATI RV380",
  57     "ATI RS400",
  58     "ATI RC410",
  59     "ATI RS480",
  60     "ATI R420",
  61     "ATI R423",
  62     "ATI R430",
  63     "ATI R480",
  64     "ATI R481",
  65     "ATI RV410",
  66     "ATI RS600",
  67     "ATI RS690",
  68     "ATI RS740",
  69     "ATI RV515",
  70     "ATI R520",
  71     "ATI RV530",
  72     "ATI R580",
  73     "ATI RV560",
  74     "ATI RV570"
  75 };
  76
  77 static const char* r300_get_name(struct pipe_screen* pscreen)
  78 {
  79     struct r300_screen* r300screen = r300_screen(pscreen);
  80
  81     return chip_families[r300screen->caps.family];
  82 }
  83
  84 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  85 {
  86     struct r300_screen* r300screen = r300_screen(pscreen);
  87     boolean is_r500 = r300screen->caps.is_r500;
  88
  89     switch (param) {
  90         /* Supported features (boolean caps). */
  91         case PIPE_CAP_NPOT_TEXTURES:
  92         case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  93         case PIPE_CAP_TWO_SIDED_STENCIL:
  94         case PIPE_CAP_ANISOTROPIC_FILTER:
  95         case PIPE_CAP_POINT_SPRITE:
  96         case PIPE_CAP_OCCLUSION_QUERY:
  97         case PIPE_CAP_TEXTURE_SHADOW_MAP:
  98         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  99         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 100         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 101         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 102         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 103         case PIPE_CAP_CONDITIONAL_RENDER:
 104         case PIPE_CAP_TEXTURE_BARRIER:
 105         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 106         case PIPE_CAP_USER_INDEX_BUFFERS:
 107         case PIPE_CAP_USER_CONSTANT_BUFFERS:
 108         case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 109         case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 110             return 1;
 111
 112         case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 113             return R300_BUFFER_ALIGNMENT;
 114
 115         case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 116             return 16;
 117
 118         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 119             return 120;
 120
 121         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 122         case PIPE_CAP_TEXTURE_SWIZZLE:
 123             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 124
 125         /* We don't support color clamping on r500, so that we can use color
 126          * intepolators for generic varyings. */
 127         case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 128             return !is_r500;
 129
 130         /* Supported on r500 only. */
 131         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 132         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 133         case PIPE_CAP_SM3:
 134             return is_r500 ? 1 : 0;
 135
 136         /* Unsupported features. */
 137         case PIPE_CAP_QUERY_TIME_ELAPSED:
 138         case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 139         case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 140         case PIPE_CAP_INDEP_BLEND_ENABLE:
 141         case PIPE_CAP_INDEP_BLEND_FUNC:
 142         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 143         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 144         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 145         case PIPE_CAP_TGSI_INSTANCEID:
 146         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 147         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 148         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 149         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 150         case PIPE_CAP_MIN_TEXEL_OFFSET:
 151         case PIPE_CAP_MAX_TEXEL_OFFSET:
 152         case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 153         case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 154         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 155         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 156         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 157         case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 158         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 159         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 160         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 161         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 162         case PIPE_CAP_COMPUTE:
 163         case PIPE_CAP_START_INSTANCE:
 164         case PIPE_CAP_QUERY_TIMESTAMP:
 165         case PIPE_CAP_TEXTURE_MULTISAMPLE:
 166         case PIPE_CAP_CUBE_MAP_ARRAY:
 167         case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 168         case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 169         case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 170         case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 171         case PIPE_CAP_TGSI_VS_LAYER:
 172         case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 173         case PIPE_CAP_TEXTURE_GATHER_SM5:
 174         case PIPE_CAP_TEXTURE_QUERY_LOD:
 175         case PIPE_CAP_FAKE_SW_MSAA:
 176         case PIPE_CAP_SAMPLE_SHADING:
 177             return 0;
 178
 179         /* SWTCL-only features. */
 180         case PIPE_CAP_PRIMITIVE_RESTART:
 181         case PIPE_CAP_USER_VERTEX_BUFFERS:
 182             return !r300screen->caps.has_tcl;
 183
 184         /* HWTCL-only features / limitations. */
 185         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 186         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 187         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 188             return r300screen->caps.has_tcl;
 189         case PIPE_CAP_TGSI_TEXCOORD:
 190             return 0;
 191
 192         /* Texturing. */
 193         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 194         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 195         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 196             /* 13 == 4096, 12 == 2048 */
 197             return is_r500 ? 13 : 12;
 198
 199         /* Render targets. */
 200         case PIPE_CAP_MAX_RENDER_TARGETS:
 201             return 4;
 202         case PIPE_CAP_ENDIANNESS:
 203             return PIPE_ENDIAN_LITTLE;
 204
 205         case PIPE_CAP_MAX_VIEWPORTS:
 206             return 1;
 207     }
 208     return 0;
 209 }
 210
 211 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 212 {
 213    struct r300_screen* r300screen = r300_screen(pscreen);
 214    boolean is_r400 = r300screen->caps.is_r400;
 215    boolean is_r500 = r300screen->caps.is_r500;
 216
 217    switch (shader) {
 218     case PIPE_SHADER_FRAGMENT:
 219         switch (param)
 220         {
 221         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 222             return is_r500 || is_r400 ? 512 : 96;
 223         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 224             return is_r500 || is_r400 ? 512 : 64;
 225         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 226             return is_r500 || is_r400 ? 512 : 32;
 227         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 228             return is_r500 ? 511 : 4;
 229         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 230             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 231             /* Fragment shader limits. */
 232         case PIPE_SHADER_CAP_MAX_INPUTS:
 233             /* 2 colors + 8 texcoords are always supported
 234              * (minus fog and wpos).
 235              *
 236              * R500 has the ability to turn 3rd and 4th color into
 237              * additional texcoords but there is no two-sided color
 238              * selection then. However the facing bit can be used instead. */
 239             return 10;
 240         case PIPE_SHADER_CAP_MAX_CONSTS:
 241             return is_r500 ? 256 : 32;
 242         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 243             return 1;
 244         case PIPE_SHADER_CAP_MAX_TEMPS:
 245             return is_r500 ? 128 : is_r400 ? 64 : 32;
 246         case PIPE_SHADER_CAP_MAX_PREDS:
 247             return is_r500 ? 1 : 0;
 248         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 249         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 250            return r300screen->caps.num_tex_units;
 251         case PIPE_SHADER_CAP_MAX_ADDRS:
 252         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 253         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 254         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 255         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 256         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 257         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 258         case PIPE_SHADER_CAP_SUBROUTINES:
 259         case PIPE_SHADER_CAP_INTEGERS:
 260             return 0;
 261         case PIPE_SHADER_CAP_PREFERRED_IR:
 262             return PIPE_SHADER_IR_TGSI;
 263         }
 264         break;
 265     case PIPE_SHADER_VERTEX:
 266         switch (param)
 267         {
 268         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 269         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 270         case PIPE_SHADER_CAP_SUBROUTINES:
 271             return 0;
 272         default:;
 273         }
 274
 275         if (!r300screen->caps.has_tcl) {
 276             return draw_get_shader_param(shader, param);
 277         }
 278
 279         switch (param)
 280         {
 281         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 282         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 283             return is_r500 ? 1024 : 256;
 284         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 285             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 286         case PIPE_SHADER_CAP_MAX_INPUTS:
 287             return 16;
 288         case PIPE_SHADER_CAP_MAX_CONSTS:
 289             return 256;
 290         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 291             return 1;
 292         case PIPE_SHADER_CAP_MAX_TEMPS:
 293             return 32;
 294         case PIPE_SHADER_CAP_MAX_ADDRS:
 295             return 1; /* XXX guessed */
 296         case PIPE_SHADER_CAP_MAX_PREDS:
 297             return is_r500 ? 4 : 0; /* XXX guessed. */
 298         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 299             return 1;
 300         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 301         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 302         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 303         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 304         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 305         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 306         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 307         case PIPE_SHADER_CAP_SUBROUTINES:
 308         case PIPE_SHADER_CAP_INTEGERS:
 309         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 310         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 311             return 0;
 312         case PIPE_SHADER_CAP_PREFERRED_IR:
 313             return PIPE_SHADER_IR_TGSI;
 314         }
 315         break;
 316     }
 317     return 0;
 318 }
 319
 320 static float r300_get_paramf(struct pipe_screen* pscreen,
 321                              enum pipe_capf param)
 322 {
 323     struct r300_screen* r300screen = r300_screen(pscreen);
 324
 325     switch (param) {
 326         case PIPE_CAPF_MAX_LINE_WIDTH:
 327         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 328         case PIPE_CAPF_MAX_POINT_WIDTH:
 329         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 330             /* The maximum dimensions of the colorbuffer are our practical
 331              * rendering limits. 2048 pixels should be enough for anybody. */
 332             if (r300screen->caps.is_r500) {
 333                 return 4096.0f;
 334             } else if (r300screen->caps.is_r400) {
 335                 return 4021.0f;
 336             } else {
 337                 return 2560.0f;
 338             }
 339         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 340             return 16.0f;
 341         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 342             return 16.0f;
 343         case PIPE_CAPF_GUARD_BAND_LEFT:
 344         case PIPE_CAPF_GUARD_BAND_TOP:
 345         case PIPE_CAPF_GUARD_BAND_RIGHT:
 346         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 347             /* XXX I don't know what these should be but the least we can do is
 348              * silence the potential error message */
 349             return 0.0f;
 350         default:
 351             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 352                          param);
 353             return 0.0f;
 354     }
 355 }
 356
 357 static int r300_get_video_param(struct pipe_screen *screen,
 358                                 enum pipe_video_profile profile,
 359                                 enum pipe_video_entrypoint entrypoint,
 360                                 enum pipe_video_cap param)
 361 {
 362    switch (param) {
 363       case PIPE_VIDEO_CAP_SUPPORTED:
 364          return vl_profile_supported(screen, profile, entrypoint);
 365       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 366          return 0;
 367       case PIPE_VIDEO_CAP_MAX_WIDTH:
 368       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 369          return vl_video_buffer_max_size(screen);
 370       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 371          return PIPE_FORMAT_NV12;
 372       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 373          return false;
 374       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 375          return false;
 376       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 377          return true;
 378       case PIPE_VIDEO_CAP_MAX_LEVEL:
 379          return vl_level_supported(screen, profile);
 380       default:
 381          return 0;
 382    }
 383 }
 384
 385 /**
 386  * Whether the format matches:
 387  *   PIPE_FORMAT_?10?10?10?2_UNORM
 388  */
 389 static INLINE boolean
 390 util_format_is_rgba1010102_variant(const struct util_format_description *desc)
 391 {
 392    static const unsigned size[4] = {10, 10, 10, 2};
 393    unsigned chan;
 394
 395    if (desc->block.width != 1 ||
 396        desc->block.height != 1 ||
 397        desc->block.bits != 32)
 398       return FALSE;
 399
 400    for (chan = 0; chan < 4; ++chan) {
 401       if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
 402          desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
 403          return FALSE;
 404       if (desc->channel[chan].size != size[chan])
 405          return FALSE;
 406    }
 407
 408    return TRUE;
 409 }
 410
 411 static boolean r300_is_format_supported(struct pipe_screen* screen,
 412                                         enum pipe_format format,
 413                                         enum pipe_texture_target target,
 414                                         unsigned sample_count,
 415                                         unsigned usage)
 416 {
 417     uint32_t retval = 0;
 418     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 419     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 420     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 421     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 422                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 423                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 424                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 425     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 426                        format == PIPE_FORMAT_RGTC1_SNORM ||
 427                        format == PIPE_FORMAT_LATC1_UNORM ||
 428                        format == PIPE_FORMAT_LATC1_SNORM;
 429     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 430                        format == PIPE_FORMAT_RGTC2_SNORM ||
 431                        format == PIPE_FORMAT_LATC2_UNORM ||
 432                        format == PIPE_FORMAT_LATC2_SNORM;
 433     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 434                             format == PIPE_FORMAT_R16G16_FLOAT ||
 435                             format == PIPE_FORMAT_A16_FLOAT ||
 436                             format == PIPE_FORMAT_L16_FLOAT ||
 437                             format == PIPE_FORMAT_L16A16_FLOAT ||
 438                             format == PIPE_FORMAT_R16A16_FLOAT ||
 439                             format == PIPE_FORMAT_I16_FLOAT;
 440     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 441                             format == PIPE_FORMAT_R16G16_FLOAT ||
 442                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 443                             format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
 444                             format == PIPE_FORMAT_R16G16B16X16_FLOAT;
 445     const struct util_format_description *desc;
 446
 447     if (!util_format_is_supported(format, usage))
 448        return FALSE;
 449
 450     /* Check multisampling support. */
 451     switch (sample_count) {
 452         case 0:
 453         case 1:
 454             break;
 455         case 2:
 456         case 4:
 457         case 6:
 458             /* We need DRM 2.8.0. */
 459             if (!drm_2_8_0) {
 460                 return FALSE;
 461             }
 462             /* No texturing and scanout. */
 463             if (usage & (PIPE_BIND_SAMPLER_VIEW |
 464                          PIPE_BIND_DISPLAY_TARGET |
 465                          PIPE_BIND_SCANOUT)) {
 466                 return FALSE;
 467             }
 468
 469             desc = util_format_description(format);
 470
 471             if (is_r500) {
 472                 /* Only allow depth/stencil, RGBA8, RGBA1010102, RGBA16F. */
 473                 if (!util_format_is_depth_or_stencil(format) &&
 474                     !util_format_is_rgba8_variant(desc) &&
 475                     !util_format_is_rgba1010102_variant(desc) &&
 476                     format != PIPE_FORMAT_R16G16B16A16_FLOAT &&
 477                     format != PIPE_FORMAT_R16G16B16X16_FLOAT) {
 478                     return FALSE;
 479                 }
 480             } else {
 481                 /* Only allow depth/stencil, RGBA8. */
 482                 if (!util_format_is_depth_or_stencil(format) &&
 483                     !util_format_is_rgba8_variant(desc)) {
 484                     return FALSE;
 485                 }
 486             }
 487             break;
 488         default:
 489             return FALSE;
 490     }
 491
 492     /* Check sampler format support. */
 493     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 494         /* these two are broken for an unknown reason */
 495         format != PIPE_FORMAT_R8G8B8X8_SNORM &&
 496         format != PIPE_FORMAT_R16G16B16X16_SNORM &&
 497         /* ATI1N is r5xx-only. */
 498         (is_r500 || !is_ati1n) &&
 499         /* ATI2N is supported on r4xx-r5xx. */
 500         (is_r400 || is_r500 || !is_ati2n) &&
 501         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 502         (drm_2_8_0 || !is_x16f_xy16f) &&
 503         r300_is_sampler_format_supported(format)) {
 504         retval |= PIPE_BIND_SAMPLER_VIEW;
 505     }
 506
 507     /* Check colorbuffer format support. */
 508     if ((usage & (PIPE_BIND_RENDER_TARGET |
 509                   PIPE_BIND_DISPLAY_TARGET |
 510                   PIPE_BIND_SCANOUT |
 511                   PIPE_BIND_SHARED)) &&
 512         /* 2101010 cannot be rendered to on non-r5xx. */
 513         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 514         r300_is_colorbuffer_format_supported(format)) {
 515         retval |= usage &
 516             (PIPE_BIND_RENDER_TARGET |
 517              PIPE_BIND_DISPLAY_TARGET |
 518              PIPE_BIND_SCANOUT |
 519              PIPE_BIND_SHARED);
 520     }
 521
 522     /* Check depth-stencil format support. */
 523     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 524         r300_is_zs_format_supported(format)) {
 525         retval |= PIPE_BIND_DEPTH_STENCIL;
 526     }
 527
 528     /* Check vertex buffer format support. */
 529     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 530         if (r300_screen(screen)->caps.has_tcl) {
 531             /* Half float is supported on >= R400. */
 532             if ((is_r400 || is_r500 || !is_half_float) &&
 533                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 534                 retval |= PIPE_BIND_VERTEX_BUFFER;
 535             }
 536         } else {
 537             /* SW TCL */
 538             if (!util_format_is_pure_integer(format)) {
 539                 retval |= PIPE_BIND_VERTEX_BUFFER;
 540             }
 541         }
 542     }
 543
 544     /* Transfers are always supported. */
 545     if (usage & PIPE_BIND_TRANSFER_READ)
 546         retval |= PIPE_BIND_TRANSFER_READ;
 547     if (usage & PIPE_BIND_TRANSFER_WRITE)
 548         retval |= PIPE_BIND_TRANSFER_WRITE;
 549
 550     return retval == usage;
 551 }
 552
 553 static void r300_destroy_screen(struct pipe_screen* pscreen)
 554 {
 555     struct r300_screen* r300screen = r300_screen(pscreen);
 556     struct radeon_winsys *rws = radeon_winsys(pscreen);
 557
 558     if (rws && !rws->unref(rws))
 559       return;
 560
 561     pipe_mutex_destroy(r300screen->cmask_mutex);
 562
 563     if (rws)
 564       rws->destroy(rws);
 565
 566     FREE(r300screen);
 567 }
 568
 569 static void r300_fence_reference(struct pipe_screen *screen,
 570                                  struct pipe_fence_handle **ptr,
 571                                  struct pipe_fence_handle *fence)
 572 {
 573     struct radeon_winsys *rws = r300_screen(screen)->rws;
 574
 575     rws->fence_reference(ptr, fence);
 576 }
 577
 578 static boolean r300_fence_signalled(struct pipe_screen *screen,
 579                                     struct pipe_fence_handle *fence)
 580 {
 581     struct radeon_winsys *rws = r300_screen(screen)->rws;
 582
 583     return rws->fence_wait(rws, fence, 0);
 584 }
 585
 586 static boolean r300_fence_finish(struct pipe_screen *screen,
 587                                  struct pipe_fence_handle *fence,
 588                                  uint64_t timeout)
 589 {
 590     struct radeon_winsys *rws = r300_screen(screen)->rws;
 591
 592     return rws->fence_wait(rws, fence, timeout);
 593 }
 594
 595 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 596 {
 597     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 598
 599     if (!r300screen) {
 600         FREE(r300screen);
 601         return NULL;
 602     }
 603
 604     rws->query_info(rws, &r300screen->info);
 605
 606     r300_init_debug(r300screen);
 607     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 608
 609     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 610         r300screen->caps.zmask_ram = 0;
 611     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 612         r300screen->caps.hiz_ram = 0;
 613
 614     if (r300screen->info.drm_minor < 8)
 615         r300screen->caps.has_us_format = FALSE;
 616
 617     r300screen->rws = rws;
 618     r300screen->screen.destroy = r300_destroy_screen;
 619     r300screen->screen.get_name = r300_get_name;
 620     r300screen->screen.get_vendor = r300_get_vendor;
 621     r300screen->screen.get_param = r300_get_param;
 622     r300screen->screen.get_shader_param = r300_get_shader_param;
 623     r300screen->screen.get_paramf = r300_get_paramf;
 624     r300screen->screen.get_video_param = r300_get_video_param;
 625     r300screen->screen.is_format_supported = r300_is_format_supported;
 626     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 627     r300screen->screen.context_create = r300_create_context;
 628     r300screen->screen.fence_reference = r300_fence_reference;
 629     r300screen->screen.fence_signalled = r300_fence_signalled;
 630     r300screen->screen.fence_finish = r300_fence_finish;
 631
 632     r300_init_screen_resource_functions(r300screen);
 633
 634     util_format_s3tc_init();
 635     pipe_mutex_init(r300screen->cmask_mutex);
 636
 637     return &r300screen->screen;
 638 }