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 #include "draw/draw_context.h"
  31 #include "vl/vl_decoder.h"
  32 #include "vl/vl_video_buffer.h"
  33
  34 #include "state_tracker/sw_winsys.h"
  35 #include "tgsi/tgsi_exec.h"
  36
  37 #include "virgl_screen.h"
  38 #include "virgl_resource.h"
  39 #include "virgl_public.h"
  40 #include "virgl_context.h"
  41
  42 #define SP_MAX_TEXTURE_2D_LEVELS 15  /* 16K x 16K */
  43 #define SP_MAX_TEXTURE_3D_LEVELS 9   /* 512 x 512 x 512 */
  44 #define SP_MAX_TEXTURE_CUBE_LEVELS 13  /* 4K x 4K */
  45
  46 static const char *
  47 virgl_get_vendor(struct pipe_screen *screen)
  48 {
  49    return "Red Hat";
  50 }
  51
  52
  53 static const char *
  54 virgl_get_name(struct pipe_screen *screen)
  55 {
  56    return "virgl";
  57 }
  58
  59 static int
  60 virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
  61 {
  62    struct virgl_screen *vscreen = virgl_screen(screen);
  63    switch (param) {
  64    case PIPE_CAP_NPOT_TEXTURES:
  65       return 1;
  66    case PIPE_CAP_TWO_SIDED_STENCIL:
  67       return 1;
  68    case PIPE_CAP_SM3:
  69       return 1;
  70    case PIPE_CAP_ANISOTROPIC_FILTER:
  71       return 1;
  72    case PIPE_CAP_POINT_SPRITE:
  73       return 1;
  74    case PIPE_CAP_MAX_RENDER_TARGETS:
  75       return vscreen->caps.caps.v1.max_render_targets;
  76    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  77       return vscreen->caps.caps.v1.max_dual_source_render_targets;
  78    case PIPE_CAP_OCCLUSION_QUERY:
  79       return vscreen->caps.caps.v1.bset.occlusion_query;
  80    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  81       return vscreen->caps.caps.v1.bset.mirror_clamp;
  82    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  83       return 1;
  84    case PIPE_CAP_TEXTURE_SWIZZLE:
  85       return 1;
  86    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  87       return SP_MAX_TEXTURE_2D_LEVELS;
  88    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  89       return SP_MAX_TEXTURE_3D_LEVELS;
  90    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  91       return SP_MAX_TEXTURE_CUBE_LEVELS;
  92    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  93       return 1;
  94    case PIPE_CAP_INDEP_BLEND_ENABLE:
  95       return vscreen->caps.caps.v1.bset.indep_blend_enable;
  96    case PIPE_CAP_INDEP_BLEND_FUNC:
  97       return vscreen->caps.caps.v1.bset.indep_blend_func;
  98    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
  99    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 100    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 101    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 102       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
 103    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 104       return vscreen->caps.caps.v1.bset.depth_clip_disable;
 105    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 106       return vscreen->caps.caps.v1.max_streamout_buffers;
 107    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 108    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 109       return 16*4;
 110    case PIPE_CAP_PRIMITIVE_RESTART:
 111       return vscreen->caps.caps.v1.bset.primitive_restart;
 112    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 113       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 114    case PIPE_CAP_TGSI_INSTANCEID:
 115    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 116       return 1;
 117    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 118       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 119    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 120       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 121    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 122       return vscreen->caps.caps.v1.max_texture_array_layers;
 123    case PIPE_CAP_MIN_TEXEL_OFFSET:
 124    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 125       return -8;
 126    case PIPE_CAP_MAX_TEXEL_OFFSET:
 127    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 128       return 7;
 129    case PIPE_CAP_CONDITIONAL_RENDER:
 130       return vscreen->caps.caps.v1.bset.conditional_render;
 131    case PIPE_CAP_TEXTURE_BARRIER:
 132       return 0;
 133    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 134       return 1;
 135    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 136    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 137       return vscreen->caps.caps.v1.bset.color_clamping;
 138    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 139       return 1;
 140    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 141       return vscreen->caps.caps.v1.glsl_level;
 142    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 143       return 0;
 144    case PIPE_CAP_COMPUTE:
 145       return 0;
 146    case PIPE_CAP_USER_VERTEX_BUFFERS:
 147       return 0;
 148    case PIPE_CAP_USER_INDEX_BUFFERS:
 149    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 150       return 1;
 151    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 152       return 16;
 153    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 154       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 155    case PIPE_CAP_START_INSTANCE:
 156       return vscreen->caps.caps.v1.bset.start_instance;
 157    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 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    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 162       return 0;
 163    case PIPE_CAP_QUERY_TIMESTAMP:
 164       return 1;
 165    case PIPE_CAP_QUERY_TIME_ELAPSED:
 166       return 0;
 167    case PIPE_CAP_TGSI_TEXCOORD:
 168       return 0;
 169    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 170       return VIRGL_MAP_BUFFER_ALIGNMENT;
 171    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 172       return vscreen->caps.caps.v1.max_tbo_size > 0;
 173    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 174       return 0;
 175    case PIPE_CAP_CUBE_MAP_ARRAY:
 176       return vscreen->caps.caps.v1.bset.cube_map_array;
 177    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 178       return vscreen->caps.caps.v1.bset.texture_multisample;
 179    case PIPE_CAP_MAX_VIEWPORTS:
 180       return vscreen->caps.caps.v1.max_viewports;
 181    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 182       return vscreen->caps.caps.v1.max_tbo_size;
 183    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 184    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 185    case PIPE_CAP_ENDIANNESS:
 186       return 0;
 187    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 188       return 1;
 189    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 190       return 0;
 191    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 192       return 1024;
 193    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 194       return 16384;
 195    case PIPE_CAP_TEXTURE_QUERY_LOD:
 196       return vscreen->caps.caps.v1.bset.texture_query_lod;
 197    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 198       return vscreen->caps.caps.v1.max_texture_gather_components;
 199    case PIPE_CAP_TEXTURE_GATHER_SM5:
 200    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 201    case PIPE_CAP_SAMPLE_SHADING:
 202    case PIPE_CAP_FAKE_SW_MSAA:
 203    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 204    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 205    case PIPE_CAP_MAX_VERTEX_STREAMS:
 206    case PIPE_CAP_DRAW_INDIRECT:
 207    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 208    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 209    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 210    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 211    case PIPE_CAP_CLIP_HALFZ:
 212    case PIPE_CAP_VERTEXID_NOBASE:
 213    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 214    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 215    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 216    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 217    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 218    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 219    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 220    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 221    case PIPE_CAP_TGSI_TXQS:
 222    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 223    case PIPE_CAP_SHAREABLE_SHADERS:
 224       return 0;
 225    case PIPE_CAP_VENDOR_ID:
 226       return 0x1af4;
 227    case PIPE_CAP_DEVICE_ID:
 228       return 0x1010;
 229    case PIPE_CAP_ACCELERATED:
 230       return 1;
 231    case PIPE_CAP_UMA:
 232    case PIPE_CAP_VIDEO_MEMORY:
 233       return 0;
 234    }
 235    /* should only get here on unhandled cases */
 236    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 237    return 0;
 238 }
 239
 240 static int
 241 virgl_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 242 {
 243    struct virgl_screen *vscreen = virgl_screen(screen);
 244    switch(shader)
 245    {
 246    case PIPE_SHADER_FRAGMENT:
 247    case PIPE_SHADER_VERTEX:
 248    case PIPE_SHADER_GEOMETRY:
 249       switch (param) {
 250       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 251       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 252       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 253       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 254          return INT_MAX;
 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          return 1;
 259       case PIPE_SHADER_CAP_MAX_INPUTS:
 260          if (vscreen->caps.caps.v1.glsl_level < 150)
 261             return 16;
 262          return shader == PIPE_SHADER_VERTEX ? 16 : 32;
 263       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 264          return 128;
 265      // case PIPE_SHADER_CAP_MAX_CONSTS:
 266      //    return 4096;
 267       case PIPE_SHADER_CAP_MAX_TEMPS:
 268          return 256;
 269       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 270          return vscreen->caps.caps.v1.max_uniform_blocks;
 271     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 272      //    return 1;
 273       case PIPE_SHADER_CAP_MAX_PREDS:
 274          return 0;
 275       case PIPE_SHADER_CAP_SUBROUTINES:
 276          return 1;
 277       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 278             return 16;
 279       case PIPE_SHADER_CAP_INTEGERS:
 280          return vscreen->caps.caps.v1.glsl_level >= 130;
 281       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 282          return 32;
 283       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 284          return 4096 * sizeof(float[4]);
 285       default:
 286          return 0;
 287       }
 288    default:
 289       return 0;
 290    }
 291 }
 292
 293 static float
 294 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 295 {
 296    switch (param) {
 297    case PIPE_CAPF_MAX_LINE_WIDTH:
 298       /* fall-through */
 299    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 300       return 255.0; /* arbitrary */
 301    case PIPE_CAPF_MAX_POINT_WIDTH:
 302       /* fall-through */
 303    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 304       return 255.0; /* arbitrary */
 305    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 306       return 16.0;
 307    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 308       return 16.0; /* arbitrary */
 309    case PIPE_CAPF_GUARD_BAND_LEFT:
 310    case PIPE_CAPF_GUARD_BAND_TOP:
 311    case PIPE_CAPF_GUARD_BAND_RIGHT:
 312    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 313       return 0.0;
 314    }
 315    /* should only get here on unhandled cases */
 316    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 317    return 0.0;
 318 }
 319
 320 static boolean
 321 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 322                                  enum pipe_format format)
 323 {
 324    struct virgl_screen *vscreen = virgl_screen(screen);
 325    const struct util_format_description *format_desc;
 326    int i;
 327
 328    format_desc = util_format_description(format);
 329    if (!format_desc)
 330       return FALSE;
 331
 332    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 333       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 334       int big = vformat / 32;
 335       int small = vformat % 32;
 336       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 337          return FALSE;
 338       return TRUE;
 339    }
 340
 341    /* Find the first non-VOID channel. */
 342    for (i = 0; i < 4; i++) {
 343       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 344          break;
 345       }
 346    }
 347
 348    if (i == 4)
 349       return FALSE;
 350
 351    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 352       return FALSE;
 353
 354    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 355       return FALSE;
 356    return TRUE;
 357 }
 358
 359 /**
 360  * Query format support for creating a texture, drawing surface, etc.
 361  * \param format  the format to test
 362  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 363  */
 364 static boolean
 365 virgl_is_format_supported( struct pipe_screen *screen,
 366                                  enum pipe_format format,
 367                                  enum pipe_texture_target target,
 368                                  unsigned sample_count,
 369                                  unsigned bind)
 370 {
 371    struct virgl_screen *vscreen = virgl_screen(screen);
 372    const struct util_format_description *format_desc;
 373    int i;
 374
 375    assert(target == PIPE_BUFFER ||
 376           target == PIPE_TEXTURE_1D ||
 377           target == PIPE_TEXTURE_1D_ARRAY ||
 378           target == PIPE_TEXTURE_2D ||
 379           target == PIPE_TEXTURE_2D_ARRAY ||
 380           target == PIPE_TEXTURE_RECT ||
 381           target == PIPE_TEXTURE_3D ||
 382           target == PIPE_TEXTURE_CUBE ||
 383           target == PIPE_TEXTURE_CUBE_ARRAY);
 384
 385    format_desc = util_format_description(format);
 386    if (!format_desc)
 387       return FALSE;
 388
 389    if (util_format_is_intensity(format))
 390       return FALSE;
 391
 392    if (sample_count > 1) {
 393       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 394          return FALSE;
 395       if (sample_count > vscreen->caps.caps.v1.max_samples)
 396          return FALSE;
 397    }
 398
 399    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 400       return virgl_is_vertex_format_supported(screen, format);
 401    }
 402
 403    if (bind & PIPE_BIND_RENDER_TARGET) {
 404       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 405          return FALSE;
 406
 407       /*
 408        * Although possible, it is unnatural to render into compressed or YUV
 409        * surfaces. So disable these here to avoid going into weird paths
 410        * inside the state trackers.
 411        */
 412       if (format_desc->block.width != 1 ||
 413           format_desc->block.height != 1)
 414          return FALSE;
 415
 416       {
 417          int big = format / 32;
 418          int small = format % 32;
 419          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 420             return FALSE;
 421       }
 422    }
 423
 424    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 425       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 426          return FALSE;
 427    }
 428
 429    /*
 430     * All other operations (sampling, transfer, etc).
 431     */
 432
 433    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 434       if (util_format_s3tc_enabled)
 435          goto out_lookup;
 436       return FALSE;
 437    }
 438    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 439       goto out_lookup;
 440    }
 441
 442    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 443       goto out_lookup;
 444    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 445       goto out_lookup;
 446    }
 447
 448    /* Find the first non-VOID channel. */
 449    for (i = 0; i < 4; i++) {
 450       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 451          break;
 452       }
 453    }
 454
 455    if (i == 4)
 456       return FALSE;
 457
 458    /* no L4A4 */
 459    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 460       return FALSE;
 461
 462  out_lookup:
 463    {
 464       int big = format / 32;
 465       int small = format % 32;
 466       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 467          return FALSE;
 468    }
 469    /*
 470     * Everything else should be supported by u_format.
 471     */
 472    return TRUE;
 473 }
 474
 475 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 476                                       struct pipe_resource *res,
 477                                       unsigned level, unsigned layer,
 478                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 479 {
 480    struct virgl_screen *vscreen = virgl_screen(screen);
 481    struct virgl_winsys *vws = vscreen->vws;
 482    struct virgl_resource *vres = (struct virgl_resource *)res;
 483
 484    if (vws->flush_frontbuffer)
 485       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 486                              sub_box);
 487 }
 488
 489 static void virgl_fence_reference(struct pipe_screen *screen,
 490                                   struct pipe_fence_handle **ptr,
 491                                   struct pipe_fence_handle *fence)
 492 {
 493    struct virgl_screen *vscreen = virgl_screen(screen);
 494    struct virgl_winsys *vws = vscreen->vws;
 495
 496    vws->fence_reference(vws, ptr, fence);
 497 }
 498
 499 static boolean virgl_fence_finish(struct pipe_screen *screen,
 500                                   struct pipe_fence_handle *fence,
 501                                   uint64_t timeout)
 502 {
 503    struct virgl_screen *vscreen = virgl_screen(screen);
 504    struct virgl_winsys *vws = vscreen->vws;
 505
 506    return vws->fence_wait(vws, fence, timeout);
 507 }
 508
 509 static uint64_t
 510 virgl_get_timestamp(struct pipe_screen *_screen)
 511 {
 512    return os_time_get_nano();
 513 }
 514
 515 static void
 516 virgl_destroy_screen(struct pipe_screen *screen)
 517 {
 518    struct virgl_screen *vscreen = virgl_screen(screen);
 519    struct virgl_winsys *vws = vscreen->vws;
 520
 521    if (vws)
 522       vws->destroy(vws);
 523    FREE(vscreen);
 524 }
 525
 526 struct pipe_screen *
 527 virgl_create_screen(struct virgl_winsys *vws)
 528 {
 529    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 530
 531    if (!screen)
 532       return NULL;
 533
 534    screen->vws = vws;
 535    screen->winsys = NULL;
 536    screen->base.get_name = virgl_get_name;
 537    screen->base.get_vendor = virgl_get_vendor;
 538    screen->base.get_param = virgl_get_param;
 539    screen->base.get_shader_param = virgl_get_shader_param;
 540    screen->base.get_paramf = virgl_get_paramf;
 541    screen->base.is_format_supported = virgl_is_format_supported;
 542    screen->base.destroy = virgl_destroy_screen;
 543    screen->base.context_create = virgl_context_create;
 544    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 545    screen->base.get_timestamp = virgl_get_timestamp;
 546    screen->base.fence_reference = virgl_fence_reference;
 547    //screen->base.fence_signalled = virgl_fence_signalled;
 548    screen->base.fence_finish = virgl_fence_finish;
 549
 550    virgl_init_screen_resource_functions(&screen->base);
 551
 552    vws->get_caps(vws, &screen->caps);
 553
 554
 555    util_format_s3tc_init();
 556    return &screen->base;
 557 }