src/gallium/drivers/virgl/virgl_screen.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23 #include "util/u_memory.h"
  24 #include "util/u_format.h"
  25 #include "util/u_format_s3tc.h"
  26 #include "util/u_video.h"
  27 #include "os/os_time.h"
  28 #include "pipe/p_defines.h"
  29 #include "pipe/p_screen.h"
  30
  31 #include "tgsi/tgsi_exec.h"
  32
  33 #include "virgl_screen.h"
  34 #include "virgl_resource.h"
  35 #include "virgl_public.h"
  36 #include "virgl_context.h"
  37
  38 #define SP_MAX_TEXTURE_2D_LEVELS 15  /* 16K x 16K */
  39 #define SP_MAX_TEXTURE_3D_LEVELS 9   /* 512 x 512 x 512 */
  40 #define SP_MAX_TEXTURE_CUBE_LEVELS 13  /* 4K x 4K */
  41
  42 static const char *
  43 virgl_get_vendor(struct pipe_screen *screen)
  44 {
  45    return "Red Hat";
  46 }
  47
  48
  49 static const char *
  50 virgl_get_name(struct pipe_screen *screen)
  51 {
  52    return "virgl";
  53 }
  54
  55 static int
  56 virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
  57 {
  58    struct virgl_screen *vscreen = virgl_screen(screen);
  59    switch (param) {
  60    case PIPE_CAP_NPOT_TEXTURES:
  61       return 1;
  62    case PIPE_CAP_TWO_SIDED_STENCIL:
  63       return 1;
  64    case PIPE_CAP_SM3:
  65       return 1;
  66    case PIPE_CAP_ANISOTROPIC_FILTER:
  67       return 1;
  68    case PIPE_CAP_POINT_SPRITE:
  69       return 1;
  70    case PIPE_CAP_MAX_RENDER_TARGETS:
  71       return vscreen->caps.caps.v1.max_render_targets;
  72    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  73       return vscreen->caps.caps.v1.max_dual_source_render_targets;
  74    case PIPE_CAP_OCCLUSION_QUERY:
  75       return vscreen->caps.caps.v1.bset.occlusion_query;
  76    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  77       return vscreen->caps.caps.v1.bset.mirror_clamp;
  78    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  79       return 1;
  80    case PIPE_CAP_TEXTURE_SWIZZLE:
  81       return 1;
  82    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  83       return SP_MAX_TEXTURE_2D_LEVELS;
  84    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  85       return SP_MAX_TEXTURE_3D_LEVELS;
  86    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  87       return SP_MAX_TEXTURE_CUBE_LEVELS;
  88    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  89       return 1;
  90    case PIPE_CAP_INDEP_BLEND_ENABLE:
  91       return vscreen->caps.caps.v1.bset.indep_blend_enable;
  92    case PIPE_CAP_INDEP_BLEND_FUNC:
  93       return vscreen->caps.caps.v1.bset.indep_blend_func;
  94    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
  95    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
  96    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
  97    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
  98       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
  99    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 100       return vscreen->caps.caps.v1.bset.depth_clip_disable;
 101    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 102       return vscreen->caps.caps.v1.max_streamout_buffers;
 103    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 104    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 105       return 16*4;
 106    case PIPE_CAP_PRIMITIVE_RESTART:
 107       return vscreen->caps.caps.v1.bset.primitive_restart;
 108    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 109       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 110    case PIPE_CAP_TGSI_INSTANCEID:
 111    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 112       return 1;
 113    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 114       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 115    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 116       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 117    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 118       return vscreen->caps.caps.v1.max_texture_array_layers;
 119    case PIPE_CAP_MIN_TEXEL_OFFSET:
 120    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 121       return -8;
 122    case PIPE_CAP_MAX_TEXEL_OFFSET:
 123    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 124       return 7;
 125    case PIPE_CAP_CONDITIONAL_RENDER:
 126       return vscreen->caps.caps.v1.bset.conditional_render;
 127    case PIPE_CAP_TEXTURE_BARRIER:
 128       return 0;
 129    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 130       return 1;
 131    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 132    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 133       return vscreen->caps.caps.v1.bset.color_clamping;
 134    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 135       return 1;
 136    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 137       return vscreen->caps.caps.v1.glsl_level;
 138    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 139       return 0;
 140    case PIPE_CAP_COMPUTE:
 141       return 0;
 142    case PIPE_CAP_USER_VERTEX_BUFFERS:
 143       return 0;
 144    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 145       return 1;
 146    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 147       return 16;
 148    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 149    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 150       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 151    case PIPE_CAP_START_INSTANCE:
 152       return vscreen->caps.caps.v1.bset.start_instance;
 153    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 154    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 155    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 156    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 157    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 158       return 0;
 159    case PIPE_CAP_QUERY_TIMESTAMP:
 160       return 1;
 161    case PIPE_CAP_QUERY_TIME_ELAPSED:
 162       return 0;
 163    case PIPE_CAP_TGSI_TEXCOORD:
 164       return 0;
 165    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 166       return VIRGL_MAP_BUFFER_ALIGNMENT;
 167    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 168       return vscreen->caps.caps.v1.max_tbo_size > 0;
 169    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 170       return 0;
 171    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 172       return 0;
 173    case PIPE_CAP_CUBE_MAP_ARRAY:
 174       return vscreen->caps.caps.v1.bset.cube_map_array;
 175    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 176       return vscreen->caps.caps.v1.bset.texture_multisample;
 177    case PIPE_CAP_MAX_VIEWPORTS:
 178       return vscreen->caps.caps.v1.max_viewports;
 179    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 180       return vscreen->caps.caps.v1.max_tbo_size;
 181    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 182    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 183    case PIPE_CAP_ENDIANNESS:
 184       return 0;
 185    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 186    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 187       return 1;
 188    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 189       return 0;
 190    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 191       return 256;
 192    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 193       return 16384;
 194    case PIPE_CAP_TEXTURE_QUERY_LOD:
 195       return vscreen->caps.caps.v1.bset.texture_query_lod;
 196    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 197       return vscreen->caps.caps.v1.max_texture_gather_components;
 198    case PIPE_CAP_TEXTURE_GATHER_SM5:
 199    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 200    case PIPE_CAP_SAMPLE_SHADING:
 201    case PIPE_CAP_FAKE_SW_MSAA:
 202    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 203    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 204    case PIPE_CAP_MAX_VERTEX_STREAMS:
 205    case PIPE_CAP_DRAW_INDIRECT:
 206    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 207    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 208    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 209    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 210    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 211    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 212    case PIPE_CAP_CLIP_HALFZ:
 213    case PIPE_CAP_VERTEXID_NOBASE:
 214    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 215    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 216    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 217    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 218    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 219    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 220    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 221    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 222    case PIPE_CAP_TGSI_TXQS:
 223    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 224    case PIPE_CAP_SHAREABLE_SHADERS:
 225    case PIPE_CAP_CLEAR_TEXTURE:
 226    case PIPE_CAP_DRAW_PARAMETERS:
 227    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 228    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 229    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 230    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 231    case PIPE_CAP_INVALIDATE_BUFFER:
 232    case PIPE_CAP_GENERATE_MIPMAP:
 233    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 234    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 235    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 236    case PIPE_CAP_STRING_MARKER:
 237    case PIPE_CAP_QUERY_MEMORY_INFO:
 238    case PIPE_CAP_PCI_GROUP:
 239    case PIPE_CAP_PCI_BUS:
 240    case PIPE_CAP_PCI_DEVICE:
 241    case PIPE_CAP_PCI_FUNCTION:
 242    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 243    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 244    case PIPE_CAP_CULL_DISTANCE:
 245    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 246    case PIPE_CAP_TGSI_VOTE:
 247    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 248    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 249    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 250    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 251    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 252    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 253    case PIPE_CAP_TGSI_FS_FBFETCH:
 254    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 255    case PIPE_CAP_INT64:
 256    case PIPE_CAP_INT64_DIVMOD:
 257    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 258    case PIPE_CAP_TGSI_CLOCK:
 259    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 260    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 261    case PIPE_CAP_TGSI_BALLOT:
 262    case PIPE_CAP_DOUBLES:
 263    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 264    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 265    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 266    case PIPE_CAP_POST_DEPTH_COVERAGE:
 267    case PIPE_CAP_BINDLESS_TEXTURE:
 268    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 269    case PIPE_CAP_QUERY_SO_OVERFLOW:
 270       return 0;
 271    case PIPE_CAP_VENDOR_ID:
 272       return 0x1af4;
 273    case PIPE_CAP_DEVICE_ID:
 274       return 0x1010;
 275    case PIPE_CAP_ACCELERATED:
 276       return 1;
 277    case PIPE_CAP_UMA:
 278    case PIPE_CAP_VIDEO_MEMORY:
 279       return 0;
 280    case PIPE_CAP_NATIVE_FENCE_FD:
 281       return 0;
 282    }
 283    /* should only get here on unhandled cases */
 284    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 285    return 0;
 286 }
 287
 288 static int
 289 virgl_get_shader_param(struct pipe_screen *screen,
 290                        enum pipe_shader_type shader,
 291                        enum pipe_shader_cap param)
 292 {
 293    struct virgl_screen *vscreen = virgl_screen(screen);
 294    switch(shader)
 295    {
 296    case PIPE_SHADER_FRAGMENT:
 297    case PIPE_SHADER_VERTEX:
 298    case PIPE_SHADER_GEOMETRY:
 299       switch (param) {
 300       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 301       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 302       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 303       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 304          return INT_MAX;
 305       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 306       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 307       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 308          return 1;
 309       case PIPE_SHADER_CAP_MAX_INPUTS:
 310          if (vscreen->caps.caps.v1.glsl_level < 150)
 311             return 16;
 312          return (shader == PIPE_SHADER_VERTEX ||
 313                  shader == PIPE_SHADER_GEOMETRY) ? 16 : 32;
 314       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 315          return 32;
 316      // case PIPE_SHADER_CAP_MAX_CONSTS:
 317      //    return 4096;
 318       case PIPE_SHADER_CAP_MAX_TEMPS:
 319          return 256;
 320       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 321          return vscreen->caps.caps.v1.max_uniform_blocks;
 322     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 323      //    return 1;
 324       case PIPE_SHADER_CAP_SUBROUTINES:
 325          return 1;
 326       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 327             return 16;
 328       case PIPE_SHADER_CAP_INTEGERS:
 329          return vscreen->caps.caps.v1.glsl_level >= 130;
 330       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 331          return 32;
 332       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 333          return 4096 * sizeof(float[4]);
 334       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 335       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 336       default:
 337          return 0;
 338       }
 339    default:
 340       return 0;
 341    }
 342 }
 343
 344 static float
 345 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 346 {
 347    switch (param) {
 348    case PIPE_CAPF_MAX_LINE_WIDTH:
 349       /* fall-through */
 350    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 351       return 255.0; /* arbitrary */
 352    case PIPE_CAPF_MAX_POINT_WIDTH:
 353       /* fall-through */
 354    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 355       return 255.0; /* arbitrary */
 356    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 357       return 16.0;
 358    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 359       return 16.0; /* arbitrary */
 360    case PIPE_CAPF_GUARD_BAND_LEFT:
 361    case PIPE_CAPF_GUARD_BAND_TOP:
 362    case PIPE_CAPF_GUARD_BAND_RIGHT:
 363    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 364       return 0.0;
 365    }
 366    /* should only get here on unhandled cases */
 367    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 368    return 0.0;
 369 }
 370
 371 static boolean
 372 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 373                                  enum pipe_format format)
 374 {
 375    struct virgl_screen *vscreen = virgl_screen(screen);
 376    const struct util_format_description *format_desc;
 377    int i;
 378
 379    format_desc = util_format_description(format);
 380    if (!format_desc)
 381       return FALSE;
 382
 383    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 384       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 385       int big = vformat / 32;
 386       int small = vformat % 32;
 387       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 388          return FALSE;
 389       return TRUE;
 390    }
 391
 392    /* Find the first non-VOID channel. */
 393    for (i = 0; i < 4; i++) {
 394       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 395          break;
 396       }
 397    }
 398
 399    if (i == 4)
 400       return FALSE;
 401
 402    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 403       return FALSE;
 404
 405    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 406       return FALSE;
 407    return TRUE;
 408 }
 409
 410 /**
 411  * Query format support for creating a texture, drawing surface, etc.
 412  * \param format  the format to test
 413  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 414  */
 415 static boolean
 416 virgl_is_format_supported( struct pipe_screen *screen,
 417                                  enum pipe_format format,
 418                                  enum pipe_texture_target target,
 419                                  unsigned sample_count,
 420                                  unsigned bind)
 421 {
 422    struct virgl_screen *vscreen = virgl_screen(screen);
 423    const struct util_format_description *format_desc;
 424    int i;
 425
 426    assert(target == PIPE_BUFFER ||
 427           target == PIPE_TEXTURE_1D ||
 428           target == PIPE_TEXTURE_1D_ARRAY ||
 429           target == PIPE_TEXTURE_2D ||
 430           target == PIPE_TEXTURE_2D_ARRAY ||
 431           target == PIPE_TEXTURE_RECT ||
 432           target == PIPE_TEXTURE_3D ||
 433           target == PIPE_TEXTURE_CUBE ||
 434           target == PIPE_TEXTURE_CUBE_ARRAY);
 435
 436    format_desc = util_format_description(format);
 437    if (!format_desc)
 438       return FALSE;
 439
 440    if (util_format_is_intensity(format))
 441       return FALSE;
 442
 443    if (sample_count > 1) {
 444       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 445          return FALSE;
 446       if (sample_count > vscreen->caps.caps.v1.max_samples)
 447          return FALSE;
 448    }
 449
 450    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 451       return virgl_is_vertex_format_supported(screen, format);
 452    }
 453
 454    if (bind & PIPE_BIND_RENDER_TARGET) {
 455       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 456          return FALSE;
 457
 458       /*
 459        * Although possible, it is unnatural to render into compressed or YUV
 460        * surfaces. So disable these here to avoid going into weird paths
 461        * inside the state trackers.
 462        */
 463       if (format_desc->block.width != 1 ||
 464           format_desc->block.height != 1)
 465          return FALSE;
 466
 467       {
 468          int big = format / 32;
 469          int small = format % 32;
 470          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 471             return FALSE;
 472       }
 473    }
 474
 475    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 476       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 477          return FALSE;
 478    }
 479
 480    /*
 481     * All other operations (sampling, transfer, etc).
 482     */
 483
 484    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 485       if (util_format_s3tc_enabled)
 486          goto out_lookup;
 487       return FALSE;
 488    }
 489    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 490       goto out_lookup;
 491    }
 492    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 493       goto out_lookup;
 494    }
 495
 496    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 497       goto out_lookup;
 498    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 499       goto out_lookup;
 500    }
 501
 502    /* Find the first non-VOID channel. */
 503    for (i = 0; i < 4; i++) {
 504       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 505          break;
 506       }
 507    }
 508
 509    if (i == 4)
 510       return FALSE;
 511
 512    /* no L4A4 */
 513    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 514       return FALSE;
 515
 516  out_lookup:
 517    {
 518       int big = format / 32;
 519       int small = format % 32;
 520       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 521          return FALSE;
 522    }
 523    /*
 524     * Everything else should be supported by u_format.
 525     */
 526    return TRUE;
 527 }
 528
 529 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 530                                       struct pipe_resource *res,
 531                                       unsigned level, unsigned layer,
 532                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 533 {
 534    struct virgl_screen *vscreen = virgl_screen(screen);
 535    struct virgl_winsys *vws = vscreen->vws;
 536    struct virgl_resource *vres = virgl_resource(res);
 537
 538    if (vws->flush_frontbuffer)
 539       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 540                              sub_box);
 541 }
 542
 543 static void virgl_fence_reference(struct pipe_screen *screen,
 544                                   struct pipe_fence_handle **ptr,
 545                                   struct pipe_fence_handle *fence)
 546 {
 547    struct virgl_screen *vscreen = virgl_screen(screen);
 548    struct virgl_winsys *vws = vscreen->vws;
 549
 550    vws->fence_reference(vws, ptr, fence);
 551 }
 552
 553 static boolean virgl_fence_finish(struct pipe_screen *screen,
 554                                   struct pipe_context *ctx,
 555                                   struct pipe_fence_handle *fence,
 556                                   uint64_t timeout)
 557 {
 558    struct virgl_screen *vscreen = virgl_screen(screen);
 559    struct virgl_winsys *vws = vscreen->vws;
 560
 561    return vws->fence_wait(vws, fence, timeout);
 562 }
 563
 564 static uint64_t
 565 virgl_get_timestamp(struct pipe_screen *_screen)
 566 {
 567    return os_time_get_nano();
 568 }
 569
 570 static void
 571 virgl_destroy_screen(struct pipe_screen *screen)
 572 {
 573    struct virgl_screen *vscreen = virgl_screen(screen);
 574    struct virgl_winsys *vws = vscreen->vws;
 575
 576    slab_destroy_parent(&vscreen->texture_transfer_pool);
 577
 578    if (vws)
 579       vws->destroy(vws);
 580    FREE(vscreen);
 581 }
 582
 583 struct pipe_screen *
 584 virgl_create_screen(struct virgl_winsys *vws)
 585 {
 586    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 587
 588    if (!screen)
 589       return NULL;
 590
 591    screen->vws = vws;
 592    screen->base.get_name = virgl_get_name;
 593    screen->base.get_vendor = virgl_get_vendor;
 594    screen->base.get_param = virgl_get_param;
 595    screen->base.get_shader_param = virgl_get_shader_param;
 596    screen->base.get_paramf = virgl_get_paramf;
 597    screen->base.is_format_supported = virgl_is_format_supported;
 598    screen->base.destroy = virgl_destroy_screen;
 599    screen->base.context_create = virgl_context_create;
 600    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 601    screen->base.get_timestamp = virgl_get_timestamp;
 602    screen->base.fence_reference = virgl_fence_reference;
 603    //screen->base.fence_signalled = virgl_fence_signalled;
 604    screen->base.fence_finish = virgl_fence_finish;
 605
 606    virgl_init_screen_resource_functions(&screen->base);
 607
 608    vws->get_caps(vws, &screen->caps);
 609
 610    screen->refcnt = 1;
 611
 612    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 613
 614    util_format_s3tc_init();
 615    return &screen->base;
 616 }