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* r300_get_device_vendor(struct pipe_screen* pscreen)
  51 {
  52     return "ATI";
  53 }
  54
  55 static const char* chip_families[] = {
  56     "unknown",
  57     "ATI R300",
  58     "ATI R350",
  59     "ATI RV350",
  60     "ATI RV370",
  61     "ATI RV380",
  62     "ATI RS400",
  63     "ATI RC410",
  64     "ATI RS480",
  65     "ATI R420",
  66     "ATI R423",
  67     "ATI R430",
  68     "ATI R480",
  69     "ATI R481",
  70     "ATI RV410",
  71     "ATI RS600",
  72     "ATI RS690",
  73     "ATI RS740",
  74     "ATI RV515",
  75     "ATI R520",
  76     "ATI RV530",
  77     "ATI R580",
  78     "ATI RV560",
  79     "ATI RV570"
  80 };
  81
  82 static const char* r300_get_name(struct pipe_screen* pscreen)
  83 {
  84     struct r300_screen* r300screen = r300_screen(pscreen);
  85
  86     return chip_families[r300screen->caps.family];
  87 }
  88
  89 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  90 {
  91     struct r300_screen* r300screen = r300_screen(pscreen);
  92     boolean is_r500 = r300screen->caps.is_r500;
  93
  94     switch (param) {
  95         /* Supported features (boolean caps). */
  96         case PIPE_CAP_NPOT_TEXTURES:
  97         case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  98         case PIPE_CAP_TWO_SIDED_STENCIL:
  99         case PIPE_CAP_ANISOTROPIC_FILTER:
 100         case PIPE_CAP_POINT_SPRITE:
 101         case PIPE_CAP_OCCLUSION_QUERY:
 102         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 103         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 104         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 105         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 106         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 107         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 108         case PIPE_CAP_CONDITIONAL_RENDER:
 109         case PIPE_CAP_TEXTURE_BARRIER:
 110         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 111         case PIPE_CAP_USER_INDEX_BUFFERS:
 112         case PIPE_CAP_USER_CONSTANT_BUFFERS:
 113         case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 114         case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 115         case PIPE_CAP_CLIP_HALFZ:
 116             return 1;
 117
 118         case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 119             return R300_BUFFER_ALIGNMENT;
 120
 121         case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 122             return 16;
 123
 124         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 125             return 120;
 126
 127         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 128         case PIPE_CAP_TEXTURE_SWIZZLE:
 129             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 130
 131         /* We don't support color clamping on r500, so that we can use color
 132          * intepolators for generic varyings. */
 133         case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 134             return !is_r500;
 135
 136         /* Supported on r500 only. */
 137         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 138         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 139         case PIPE_CAP_SM3:
 140             return is_r500 ? 1 : 0;
 141
 142         /* Unsupported features. */
 143         case PIPE_CAP_QUERY_TIME_ELAPSED:
 144         case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 145         case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 146         case PIPE_CAP_INDEP_BLEND_ENABLE:
 147         case PIPE_CAP_INDEP_BLEND_FUNC:
 148         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 149         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 150         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 151         case PIPE_CAP_TGSI_INSTANCEID:
 152         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 153         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 154         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 155         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 156         case PIPE_CAP_MIN_TEXEL_OFFSET:
 157         case PIPE_CAP_MAX_TEXEL_OFFSET:
 158         case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 159         case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 160         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 161         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 162         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 163         case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 164         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 165         case PIPE_CAP_MAX_VERTEX_STREAMS:
 166         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 167         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 168         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 169         case PIPE_CAP_COMPUTE:
 170         case PIPE_CAP_START_INSTANCE:
 171         case PIPE_CAP_QUERY_TIMESTAMP:
 172         case PIPE_CAP_TEXTURE_MULTISAMPLE:
 173         case PIPE_CAP_CUBE_MAP_ARRAY:
 174         case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 175         case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 176         case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 177         case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 178         case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 179         case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 180         case PIPE_CAP_TEXTURE_GATHER_SM5:
 181         case PIPE_CAP_TEXTURE_QUERY_LOD:
 182         case PIPE_CAP_FAKE_SW_MSAA:
 183         case PIPE_CAP_SAMPLE_SHADING:
 184         case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 185         case PIPE_CAP_DRAW_INDIRECT:
 186         case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 187         case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 188         case PIPE_CAP_SAMPLER_VIEW_TARGET:
 189         case PIPE_CAP_VERTEXID_NOBASE:
 190         case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 191         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 192         case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 193         case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 194         case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 195         case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 196         case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 197         case PIPE_CAP_DEPTH_BOUNDS_TEST:
 198         case PIPE_CAP_TGSI_TXQS:
 199         case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 200         case PIPE_CAP_SHAREABLE_SHADERS:
 201             return 0;
 202
 203         /* SWTCL-only features. */
 204         case PIPE_CAP_PRIMITIVE_RESTART:
 205         case PIPE_CAP_USER_VERTEX_BUFFERS:
 206         case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 207             return !r300screen->caps.has_tcl;
 208
 209         /* HWTCL-only features / limitations. */
 210         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 211         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 212         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 213             return r300screen->caps.has_tcl;
 214         case PIPE_CAP_TGSI_TEXCOORD:
 215             return 0;
 216
 217         /* Texturing. */
 218         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 219         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 220         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 221             /* 13 == 4096, 12 == 2048 */
 222             return is_r500 ? 13 : 12;
 223
 224         /* Render targets. */
 225         case PIPE_CAP_MAX_RENDER_TARGETS:
 226             return 4;
 227         case PIPE_CAP_ENDIANNESS:
 228             return PIPE_ENDIAN_LITTLE;
 229
 230         case PIPE_CAP_MAX_VIEWPORTS:
 231             return 1;
 232
 233         case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 234             return 2048;
 235
 236         case PIPE_CAP_VENDOR_ID:
 237                 return 0x1002;
 238         case PIPE_CAP_DEVICE_ID:
 239                 return r300screen->info.pci_id;
 240         case PIPE_CAP_ACCELERATED:
 241                 return 1;
 242         case PIPE_CAP_VIDEO_MEMORY:
 243                 return r300screen->info.vram_size >> 20;
 244         case PIPE_CAP_UMA:
 245                 return 0;
 246     }
 247     return 0;
 248 }
 249
 250 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 251 {
 252    struct r300_screen* r300screen = r300_screen(pscreen);
 253    boolean is_r400 = r300screen->caps.is_r400;
 254    boolean is_r500 = r300screen->caps.is_r500;
 255
 256    switch (shader) {
 257     case PIPE_SHADER_FRAGMENT:
 258         switch (param)
 259         {
 260         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 261             return is_r500 || is_r400 ? 512 : 96;
 262         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 263             return is_r500 || is_r400 ? 512 : 64;
 264         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 265             return is_r500 || is_r400 ? 512 : 32;
 266         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 267             return is_r500 ? 511 : 4;
 268         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 269             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 270             /* Fragment shader limits. */
 271         case PIPE_SHADER_CAP_MAX_INPUTS:
 272             /* 2 colors + 8 texcoords are always supported
 273              * (minus fog and wpos).
 274              *
 275              * R500 has the ability to turn 3rd and 4th color into
 276              * additional texcoords but there is no two-sided color
 277              * selection then. However the facing bit can be used instead. */
 278             return 10;
 279         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 280             return 4;
 281         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 282             return (is_r500 ? 256 : 32) * sizeof(float[4]);
 283         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 284         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 285             return 1;
 286         case PIPE_SHADER_CAP_MAX_TEMPS:
 287             return is_r500 ? 128 : is_r400 ? 64 : 32;
 288         case PIPE_SHADER_CAP_MAX_PREDS:
 289             return 0; /* unused */
 290         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 291         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 292            return r300screen->caps.num_tex_units;
 293         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 294         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 295         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 296         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 297         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 298         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 299         case PIPE_SHADER_CAP_SUBROUTINES:
 300         case PIPE_SHADER_CAP_INTEGERS:
 301         case PIPE_SHADER_CAP_DOUBLES:
 302         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 303         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 304         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 305             return 0;
 306         case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 307             return 32;
 308         case PIPE_SHADER_CAP_PREFERRED_IR:
 309             return PIPE_SHADER_IR_TGSI;
 310         }
 311         break;
 312     case PIPE_SHADER_VERTEX:
 313         switch (param)
 314         {
 315         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 316         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 317         case PIPE_SHADER_CAP_SUBROUTINES:
 318             return 0;
 319         default:;
 320         }
 321
 322         if (!r300screen->caps.has_tcl) {
 323             return draw_get_shader_param(shader, param);
 324         }
 325
 326         switch (param)
 327         {
 328         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 329         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 330             return is_r500 ? 1024 : 256;
 331         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 332             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 333         case PIPE_SHADER_CAP_MAX_INPUTS:
 334             return 16;
 335         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 336             return 10;
 337         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 338             return 256 * sizeof(float[4]);
 339         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 340             return 1;
 341         case PIPE_SHADER_CAP_MAX_TEMPS:
 342             return 32;
 343         case PIPE_SHADER_CAP_MAX_PREDS:
 344             return 0; /* unused */
 345         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 346         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 347             return 1;
 348         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 349         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 350         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 351         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 352         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 353         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 354         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 355         case PIPE_SHADER_CAP_SUBROUTINES:
 356         case PIPE_SHADER_CAP_INTEGERS:
 357         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 358         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 359         case PIPE_SHADER_CAP_DOUBLES:
 360         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 361         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 362         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 363             return 0;
 364         case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 365             return 32;
 366         case PIPE_SHADER_CAP_PREFERRED_IR:
 367             return PIPE_SHADER_IR_TGSI;
 368         }
 369         break;
 370     }
 371     return 0;
 372 }
 373
 374 static float r300_get_paramf(struct pipe_screen* pscreen,
 375                              enum pipe_capf param)
 376 {
 377     struct r300_screen* r300screen = r300_screen(pscreen);
 378
 379     switch (param) {
 380         case PIPE_CAPF_MAX_LINE_WIDTH:
 381         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 382         case PIPE_CAPF_MAX_POINT_WIDTH:
 383         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 384             /* The maximum dimensions of the colorbuffer are our practical
 385              * rendering limits. 2048 pixels should be enough for anybody. */
 386             if (r300screen->caps.is_r500) {
 387                 return 4096.0f;
 388             } else if (r300screen->caps.is_r400) {
 389                 return 4021.0f;
 390             } else {
 391                 return 2560.0f;
 392             }
 393         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 394             return 16.0f;
 395         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 396             return 16.0f;
 397         case PIPE_CAPF_GUARD_BAND_LEFT:
 398         case PIPE_CAPF_GUARD_BAND_TOP:
 399         case PIPE_CAPF_GUARD_BAND_RIGHT:
 400         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 401             return 0.0f;
 402         default:
 403             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 404                          param);
 405             return 0.0f;
 406     }
 407 }
 408
 409 static int r300_get_video_param(struct pipe_screen *screen,
 410                                 enum pipe_video_profile profile,
 411                                 enum pipe_video_entrypoint entrypoint,
 412                                 enum pipe_video_cap param)
 413 {
 414    switch (param) {
 415       case PIPE_VIDEO_CAP_SUPPORTED:
 416          return vl_profile_supported(screen, profile, entrypoint);
 417       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 418          return 0;
 419       case PIPE_VIDEO_CAP_MAX_WIDTH:
 420       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 421          return vl_video_buffer_max_size(screen);
 422       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 423          return PIPE_FORMAT_NV12;
 424       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 425          return false;
 426       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 427          return false;
 428       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 429          return true;
 430       case PIPE_VIDEO_CAP_MAX_LEVEL:
 431          return vl_level_supported(screen, profile);
 432       default:
 433          return 0;
 434    }
 435 }
 436
 437 /**
 438  * Whether the format matches:
 439  *   PIPE_FORMAT_?10?10?10?2_UNORM
 440  */
 441 static inline boolean
 442 util_format_is_rgba1010102_variant(const struct util_format_description *desc)
 443 {
 444    static const unsigned size[4] = {10, 10, 10, 2};
 445    unsigned chan;
 446
 447    if (desc->block.width != 1 ||
 448        desc->block.height != 1 ||
 449        desc->block.bits != 32)
 450       return FALSE;
 451
 452    for (chan = 0; chan < 4; ++chan) {
 453       if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
 454          desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
 455          return FALSE;
 456       if (desc->channel[chan].size != size[chan])
 457          return FALSE;
 458    }
 459
 460    return TRUE;
 461 }
 462
 463 static bool r300_is_blending_supported(struct r300_screen *rscreen,
 464                                        enum pipe_format format)
 465 {
 466     int c;
 467     const struct util_format_description *desc =
 468         util_format_description(format);
 469
 470     if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 471         return false;
 472
 473     c = util_format_get_first_non_void_channel(format);
 474
 475     /* RGBA16F */
 476     if (rscreen->caps.is_r500 &&
 477         desc->nr_channels == 4 &&
 478         desc->channel[c].size == 16 &&
 479         desc->channel[c].type == UTIL_FORMAT_TYPE_FLOAT)
 480         return true;
 481
 482     if (desc->channel[c].normalized &&
 483         desc->channel[c].type == UTIL_FORMAT_TYPE_UNSIGNED &&
 484         desc->channel[c].size >= 4 &&
 485         desc->channel[c].size <= 10) {
 486         /* RGB10_A2, RGBA8, RGB5_A1, RGBA4, RGB565 */
 487         if (desc->nr_channels >= 3)
 488             return true;
 489
 490         if (format == PIPE_FORMAT_R8G8_UNORM)
 491             return true;
 492
 493         /* R8, I8, L8, A8 */
 494         if (desc->nr_channels == 1)
 495             return true;
 496     }
 497
 498     return false;
 499 }
 500
 501 static boolean r300_is_format_supported(struct pipe_screen* screen,
 502                                         enum pipe_format format,
 503                                         enum pipe_texture_target target,
 504                                         unsigned sample_count,
 505                                         unsigned usage)
 506 {
 507     uint32_t retval = 0;
 508     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 509     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 510     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 511     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 512                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 513                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 514                               format == PIPE_FORMAT_B10G10R10X2_UNORM ||
 515                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 516     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 517                        format == PIPE_FORMAT_RGTC1_SNORM ||
 518                        format == PIPE_FORMAT_LATC1_UNORM ||
 519                        format == PIPE_FORMAT_LATC1_SNORM;
 520     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 521                        format == PIPE_FORMAT_RGTC2_SNORM ||
 522                        format == PIPE_FORMAT_LATC2_UNORM ||
 523                        format == PIPE_FORMAT_LATC2_SNORM;
 524     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 525                             format == PIPE_FORMAT_R16G16_FLOAT ||
 526                             format == PIPE_FORMAT_A16_FLOAT ||
 527                             format == PIPE_FORMAT_L16_FLOAT ||
 528                             format == PIPE_FORMAT_L16A16_FLOAT ||
 529                             format == PIPE_FORMAT_R16A16_FLOAT ||
 530                             format == PIPE_FORMAT_I16_FLOAT;
 531     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 532                             format == PIPE_FORMAT_R16G16_FLOAT ||
 533                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 534                             format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
 535                             format == PIPE_FORMAT_R16G16B16X16_FLOAT;
 536     const struct util_format_description *desc;
 537
 538     if (!util_format_is_supported(format, usage))
 539        return FALSE;
 540
 541     /* Check multisampling support. */
 542     switch (sample_count) {
 543         case 0:
 544         case 1:
 545             break;
 546         case 2:
 547         case 4:
 548         case 6:
 549             /* We need DRM 2.8.0. */
 550             if (!drm_2_8_0) {
 551                 return FALSE;
 552             }
 553             /* No texturing and scanout. */
 554             if (usage & (PIPE_BIND_SAMPLER_VIEW |
 555                          PIPE_BIND_DISPLAY_TARGET |
 556                          PIPE_BIND_SCANOUT)) {
 557                 return FALSE;
 558             }
 559
 560             desc = util_format_description(format);
 561
 562             if (is_r500) {
 563                 /* Only allow depth/stencil, RGBA8, RGBA1010102, RGBA16F. */
 564                 if (!util_format_is_depth_or_stencil(format) &&
 565                     !util_format_is_rgba8_variant(desc) &&
 566                     !util_format_is_rgba1010102_variant(desc) &&
 567                     format != PIPE_FORMAT_R16G16B16A16_FLOAT &&
 568                     format != PIPE_FORMAT_R16G16B16X16_FLOAT) {
 569                     return FALSE;
 570                 }
 571             } else {
 572                 /* Only allow depth/stencil, RGBA8. */
 573                 if (!util_format_is_depth_or_stencil(format) &&
 574                     !util_format_is_rgba8_variant(desc)) {
 575                     return FALSE;
 576                 }
 577             }
 578             break;
 579         default:
 580             return FALSE;
 581     }
 582
 583     /* Check sampler format support. */
 584     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 585         /* these two are broken for an unknown reason */
 586         format != PIPE_FORMAT_R8G8B8X8_SNORM &&
 587         format != PIPE_FORMAT_R16G16B16X16_SNORM &&
 588         /* ATI1N is r5xx-only. */
 589         (is_r500 || !is_ati1n) &&
 590         /* ATI2N is supported on r4xx-r5xx. */
 591         (is_r400 || is_r500 || !is_ati2n) &&
 592         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 593         (drm_2_8_0 || !is_x16f_xy16f) &&
 594         r300_is_sampler_format_supported(format)) {
 595         retval |= PIPE_BIND_SAMPLER_VIEW;
 596     }
 597
 598     /* Check colorbuffer format support. */
 599     if ((usage & (PIPE_BIND_RENDER_TARGET |
 600                   PIPE_BIND_DISPLAY_TARGET |
 601                   PIPE_BIND_SCANOUT |
 602                   PIPE_BIND_SHARED |
 603                   PIPE_BIND_BLENDABLE)) &&
 604         /* 2101010 cannot be rendered to on non-r5xx. */
 605         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 606         r300_is_colorbuffer_format_supported(format)) {
 607         retval |= usage &
 608             (PIPE_BIND_RENDER_TARGET |
 609              PIPE_BIND_DISPLAY_TARGET |
 610              PIPE_BIND_SCANOUT |
 611              PIPE_BIND_SHARED);
 612
 613         if (r300_is_blending_supported(r300_screen(screen), format)) {
 614             retval |= usage & PIPE_BIND_BLENDABLE;
 615         }
 616     }
 617
 618     /* Check depth-stencil format support. */
 619     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 620         r300_is_zs_format_supported(format)) {
 621         retval |= PIPE_BIND_DEPTH_STENCIL;
 622     }
 623
 624     /* Check vertex buffer format support. */
 625     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 626         if (r300_screen(screen)->caps.has_tcl) {
 627             /* Half float is supported on >= R400. */
 628             if ((is_r400 || is_r500 || !is_half_float) &&
 629                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 630                 retval |= PIPE_BIND_VERTEX_BUFFER;
 631             }
 632         } else {
 633             /* SW TCL */
 634             if (!util_format_is_pure_integer(format)) {
 635                 retval |= PIPE_BIND_VERTEX_BUFFER;
 636             }
 637         }
 638     }
 639
 640     /* Transfers are always supported. */
 641     if (usage & PIPE_BIND_TRANSFER_READ)
 642         retval |= PIPE_BIND_TRANSFER_READ;
 643     if (usage & PIPE_BIND_TRANSFER_WRITE)
 644         retval |= PIPE_BIND_TRANSFER_WRITE;
 645
 646     return retval == usage;
 647 }
 648
 649 static void r300_destroy_screen(struct pipe_screen* pscreen)
 650 {
 651     struct r300_screen* r300screen = r300_screen(pscreen);
 652     struct radeon_winsys *rws = radeon_winsys(pscreen);
 653
 654     if (rws && !rws->unref(rws))
 655       return;
 656
 657     pipe_mutex_destroy(r300screen->cmask_mutex);
 658
 659     if (rws)
 660       rws->destroy(rws);
 661
 662     FREE(r300screen);
 663 }
 664
 665 static void r300_fence_reference(struct pipe_screen *screen,
 666                                  struct pipe_fence_handle **ptr,
 667                                  struct pipe_fence_handle *fence)
 668 {
 669     struct radeon_winsys *rws = r300_screen(screen)->rws;
 670
 671     rws->fence_reference(ptr, fence);
 672 }
 673
 674 static boolean r300_fence_finish(struct pipe_screen *screen,
 675                                  struct pipe_fence_handle *fence,
 676                                  uint64_t timeout)
 677 {
 678     struct radeon_winsys *rws = r300_screen(screen)->rws;
 679
 680     return rws->fence_wait(rws, fence, timeout);
 681 }
 682
 683 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 684 {
 685     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 686
 687     if (!r300screen) {
 688         FREE(r300screen);
 689         return NULL;
 690     }
 691
 692     rws->query_info(rws, &r300screen->info);
 693
 694     r300_init_debug(r300screen);
 695     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 696
 697     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 698         r300screen->caps.zmask_ram = 0;
 699     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 700         r300screen->caps.hiz_ram = 0;
 701
 702     if (r300screen->info.drm_minor < 8)
 703         r300screen->caps.has_us_format = FALSE;
 704
 705     r300screen->rws = rws;
 706     r300screen->screen.destroy = r300_destroy_screen;
 707     r300screen->screen.get_name = r300_get_name;
 708     r300screen->screen.get_vendor = r300_get_vendor;
 709     r300screen->screen.get_device_vendor = r300_get_device_vendor;
 710     r300screen->screen.get_param = r300_get_param;
 711     r300screen->screen.get_shader_param = r300_get_shader_param;
 712     r300screen->screen.get_paramf = r300_get_paramf;
 713     r300screen->screen.get_video_param = r300_get_video_param;
 714     r300screen->screen.is_format_supported = r300_is_format_supported;
 715     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 716     r300screen->screen.context_create = r300_create_context;
 717     r300screen->screen.fence_reference = r300_fence_reference;
 718     r300screen->screen.fence_finish = r300_fence_finish;
 719
 720     r300_init_screen_resource_functions(r300screen);
 721
 722     util_format_s3tc_init();
 723     pipe_mutex_init(r300screen->cmask_mutex);
 724
 725     return &r300screen->screen;
 726 }