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 "util/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    case PIPE_CAP_MEMOBJ:
 271    case PIPE_CAP_LOAD_CONSTBUF:
 272    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 273    case PIPE_CAP_TILE_RASTER_ORDER:
 274    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 275    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 276       return 0;
 277    case PIPE_CAP_VENDOR_ID:
 278       return 0x1af4;
 279    case PIPE_CAP_DEVICE_ID:
 280       return 0x1010;
 281    case PIPE_CAP_ACCELERATED:
 282       return 1;
 283    case PIPE_CAP_UMA:
 284    case PIPE_CAP_VIDEO_MEMORY:
 285       return 0;
 286    case PIPE_CAP_NATIVE_FENCE_FD:
 287       return 0;
 288    }
 289    /* should only get here on unhandled cases */
 290    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 291    return 0;
 292 }
 293
 294 static int
 295 virgl_get_shader_param(struct pipe_screen *screen,
 296                        enum pipe_shader_type shader,
 297                        enum pipe_shader_cap param)
 298 {
 299    struct virgl_screen *vscreen = virgl_screen(screen);
 300    switch(shader)
 301    {
 302    case PIPE_SHADER_FRAGMENT:
 303    case PIPE_SHADER_VERTEX:
 304    case PIPE_SHADER_GEOMETRY:
 305       switch (param) {
 306       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 307       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 308       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 309       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 310          return INT_MAX;
 311       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 312       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 313       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 314          return 1;
 315       case PIPE_SHADER_CAP_MAX_INPUTS:
 316          if (vscreen->caps.caps.v1.glsl_level < 150)
 317             return 16;
 318          return (shader == PIPE_SHADER_VERTEX ||
 319                  shader == PIPE_SHADER_GEOMETRY) ? 16 : 32;
 320       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 321          return 32;
 322      // case PIPE_SHADER_CAP_MAX_CONSTS:
 323      //    return 4096;
 324       case PIPE_SHADER_CAP_MAX_TEMPS:
 325          return 256;
 326       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 327          return vscreen->caps.caps.v1.max_uniform_blocks;
 328     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 329      //    return 1;
 330       case PIPE_SHADER_CAP_SUBROUTINES:
 331          return 1;
 332       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 333             return 16;
 334       case PIPE_SHADER_CAP_INTEGERS:
 335          return vscreen->caps.caps.v1.glsl_level >= 130;
 336       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 337          return 32;
 338       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 339          return 4096 * sizeof(float[4]);
 340       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 341       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 342       case PIPE_SHADER_CAP_INT64_ATOMICS:
 343       case PIPE_SHADER_CAP_FP16:
 344       default:
 345          return 0;
 346       }
 347    default:
 348       return 0;
 349    }
 350 }
 351
 352 static float
 353 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 354 {
 355    switch (param) {
 356    case PIPE_CAPF_MAX_LINE_WIDTH:
 357       /* fall-through */
 358    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 359       return 255.0; /* arbitrary */
 360    case PIPE_CAPF_MAX_POINT_WIDTH:
 361       /* fall-through */
 362    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 363       return 255.0; /* arbitrary */
 364    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 365       return 16.0;
 366    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 367       return 16.0; /* arbitrary */
 368    case PIPE_CAPF_GUARD_BAND_LEFT:
 369    case PIPE_CAPF_GUARD_BAND_TOP:
 370    case PIPE_CAPF_GUARD_BAND_RIGHT:
 371    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 372       return 0.0;
 373    }
 374    /* should only get here on unhandled cases */
 375    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 376    return 0.0;
 377 }
 378
 379 static boolean
 380 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 381                                  enum pipe_format format)
 382 {
 383    struct virgl_screen *vscreen = virgl_screen(screen);
 384    const struct util_format_description *format_desc;
 385    int i;
 386
 387    format_desc = util_format_description(format);
 388    if (!format_desc)
 389       return FALSE;
 390
 391    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 392       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 393       int big = vformat / 32;
 394       int small = vformat % 32;
 395       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 396          return FALSE;
 397       return TRUE;
 398    }
 399
 400    /* Find the first non-VOID channel. */
 401    for (i = 0; i < 4; i++) {
 402       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 403          break;
 404       }
 405    }
 406
 407    if (i == 4)
 408       return FALSE;
 409
 410    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 411       return FALSE;
 412
 413    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 414       return FALSE;
 415    return TRUE;
 416 }
 417
 418 /**
 419  * Query format support for creating a texture, drawing surface, etc.
 420  * \param format  the format to test
 421  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 422  */
 423 static boolean
 424 virgl_is_format_supported( struct pipe_screen *screen,
 425                                  enum pipe_format format,
 426                                  enum pipe_texture_target target,
 427                                  unsigned sample_count,
 428                                  unsigned bind)
 429 {
 430    struct virgl_screen *vscreen = virgl_screen(screen);
 431    const struct util_format_description *format_desc;
 432    int i;
 433
 434    assert(target == PIPE_BUFFER ||
 435           target == PIPE_TEXTURE_1D ||
 436           target == PIPE_TEXTURE_1D_ARRAY ||
 437           target == PIPE_TEXTURE_2D ||
 438           target == PIPE_TEXTURE_2D_ARRAY ||
 439           target == PIPE_TEXTURE_RECT ||
 440           target == PIPE_TEXTURE_3D ||
 441           target == PIPE_TEXTURE_CUBE ||
 442           target == PIPE_TEXTURE_CUBE_ARRAY);
 443
 444    format_desc = util_format_description(format);
 445    if (!format_desc)
 446       return FALSE;
 447
 448    if (util_format_is_intensity(format))
 449       return FALSE;
 450
 451    if (sample_count > 1) {
 452       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 453          return FALSE;
 454       if (sample_count > vscreen->caps.caps.v1.max_samples)
 455          return FALSE;
 456    }
 457
 458    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 459       return virgl_is_vertex_format_supported(screen, format);
 460    }
 461
 462    if (bind & PIPE_BIND_RENDER_TARGET) {
 463       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 464          return FALSE;
 465
 466       /*
 467        * Although possible, it is unnatural to render into compressed or YUV
 468        * surfaces. So disable these here to avoid going into weird paths
 469        * inside the state trackers.
 470        */
 471       if (format_desc->block.width != 1 ||
 472           format_desc->block.height != 1)
 473          return FALSE;
 474
 475       {
 476          int big = format / 32;
 477          int small = format % 32;
 478          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 479             return FALSE;
 480       }
 481    }
 482
 483    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 484       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 485          return FALSE;
 486    }
 487
 488    /*
 489     * All other operations (sampling, transfer, etc).
 490     */
 491
 492    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 493       goto out_lookup;
 494    }
 495    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 496       goto out_lookup;
 497    }
 498    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 499       goto out_lookup;
 500    }
 501
 502    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 503       goto out_lookup;
 504    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 505       goto out_lookup;
 506    }
 507
 508    /* Find the first non-VOID channel. */
 509    for (i = 0; i < 4; i++) {
 510       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 511          break;
 512       }
 513    }
 514
 515    if (i == 4)
 516       return FALSE;
 517
 518    /* no L4A4 */
 519    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 520       return FALSE;
 521
 522  out_lookup:
 523    {
 524       int big = format / 32;
 525       int small = format % 32;
 526       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 527          return FALSE;
 528    }
 529    /*
 530     * Everything else should be supported by u_format.
 531     */
 532    return TRUE;
 533 }
 534
 535 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 536                                       struct pipe_resource *res,
 537                                       unsigned level, unsigned layer,
 538                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 539 {
 540    struct virgl_screen *vscreen = virgl_screen(screen);
 541    struct virgl_winsys *vws = vscreen->vws;
 542    struct virgl_resource *vres = virgl_resource(res);
 543
 544    if (vws->flush_frontbuffer)
 545       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 546                              sub_box);
 547 }
 548
 549 static void virgl_fence_reference(struct pipe_screen *screen,
 550                                   struct pipe_fence_handle **ptr,
 551                                   struct pipe_fence_handle *fence)
 552 {
 553    struct virgl_screen *vscreen = virgl_screen(screen);
 554    struct virgl_winsys *vws = vscreen->vws;
 555
 556    vws->fence_reference(vws, ptr, fence);
 557 }
 558
 559 static boolean virgl_fence_finish(struct pipe_screen *screen,
 560                                   struct pipe_context *ctx,
 561                                   struct pipe_fence_handle *fence,
 562                                   uint64_t timeout)
 563 {
 564    struct virgl_screen *vscreen = virgl_screen(screen);
 565    struct virgl_winsys *vws = vscreen->vws;
 566
 567    return vws->fence_wait(vws, fence, timeout);
 568 }
 569
 570 static uint64_t
 571 virgl_get_timestamp(struct pipe_screen *_screen)
 572 {
 573    return os_time_get_nano();
 574 }
 575
 576 static void
 577 virgl_destroy_screen(struct pipe_screen *screen)
 578 {
 579    struct virgl_screen *vscreen = virgl_screen(screen);
 580    struct virgl_winsys *vws = vscreen->vws;
 581
 582    slab_destroy_parent(&vscreen->texture_transfer_pool);
 583
 584    if (vws)
 585       vws->destroy(vws);
 586    FREE(vscreen);
 587 }
 588
 589 struct pipe_screen *
 590 virgl_create_screen(struct virgl_winsys *vws)
 591 {
 592    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 593
 594    if (!screen)
 595       return NULL;
 596
 597    screen->vws = vws;
 598    screen->base.get_name = virgl_get_name;
 599    screen->base.get_vendor = virgl_get_vendor;
 600    screen->base.get_param = virgl_get_param;
 601    screen->base.get_shader_param = virgl_get_shader_param;
 602    screen->base.get_paramf = virgl_get_paramf;
 603    screen->base.is_format_supported = virgl_is_format_supported;
 604    screen->base.destroy = virgl_destroy_screen;
 605    screen->base.context_create = virgl_context_create;
 606    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 607    screen->base.get_timestamp = virgl_get_timestamp;
 608    screen->base.fence_reference = virgl_fence_reference;
 609    //screen->base.fence_signalled = virgl_fence_signalled;
 610    screen->base.fence_finish = virgl_fence_finish;
 611
 612    virgl_init_screen_resource_functions(&screen->base);
 613
 614    vws->get_caps(vws, &screen->caps);
 615
 616    screen->refcnt = 1;
 617
 618    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 619
 620    return &screen->base;
 621 }