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_SM3:
  63       return 1;
  64    case PIPE_CAP_ANISOTROPIC_FILTER:
  65       return 1;
  66    case PIPE_CAP_POINT_SPRITE:
  67       return 1;
  68    case PIPE_CAP_MAX_RENDER_TARGETS:
  69       return vscreen->caps.caps.v1.max_render_targets;
  70    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  71       return vscreen->caps.caps.v1.max_dual_source_render_targets;
  72    case PIPE_CAP_OCCLUSION_QUERY:
  73       return vscreen->caps.caps.v1.bset.occlusion_query;
  74    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  75       return vscreen->caps.caps.v1.bset.mirror_clamp;
  76    case PIPE_CAP_TEXTURE_SWIZZLE:
  77       return 1;
  78    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  79       return SP_MAX_TEXTURE_2D_LEVELS;
  80    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  81       return SP_MAX_TEXTURE_3D_LEVELS;
  82    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  83       return SP_MAX_TEXTURE_CUBE_LEVELS;
  84    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  85       return 1;
  86    case PIPE_CAP_INDEP_BLEND_ENABLE:
  87       return vscreen->caps.caps.v1.bset.indep_blend_enable;
  88    case PIPE_CAP_INDEP_BLEND_FUNC:
  89       return vscreen->caps.caps.v1.bset.indep_blend_func;
  90    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
  91    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
  92    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
  93    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
  94       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
  95    case PIPE_CAP_DEPTH_CLIP_DISABLE:
  96       return vscreen->caps.caps.v1.bset.depth_clip_disable;
  97    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
  98       return vscreen->caps.caps.v1.max_streamout_buffers;
  99    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 100    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 101       return 16*4;
 102    case PIPE_CAP_PRIMITIVE_RESTART:
 103       return vscreen->caps.caps.v1.bset.primitive_restart;
 104    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 105       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 106    case PIPE_CAP_TGSI_INSTANCEID:
 107    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 108       return 1;
 109    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 110       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 111    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 112       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 113    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 114       return vscreen->caps.caps.v1.max_texture_array_layers;
 115    case PIPE_CAP_MIN_TEXEL_OFFSET:
 116       return vscreen->caps.caps.v2.min_texel_offset;
 117    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 118       return vscreen->caps.caps.v2.min_texture_gather_offset;
 119    case PIPE_CAP_MAX_TEXEL_OFFSET:
 120       return vscreen->caps.caps.v2.max_texel_offset;
 121    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 122       return vscreen->caps.caps.v2.max_texture_gather_offset;
 123    case PIPE_CAP_CONDITIONAL_RENDER:
 124       return vscreen->caps.caps.v1.bset.conditional_render;
 125    case PIPE_CAP_TEXTURE_BARRIER:
 126       return 0;
 127    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 128       return 1;
 129    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 130    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 131       return vscreen->caps.caps.v1.bset.color_clamping;
 132    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 133       return 1;
 134    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 135       return vscreen->caps.caps.v1.glsl_level;
 136    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 137       return 0;
 138    case PIPE_CAP_COMPUTE:
 139       return 0;
 140    case PIPE_CAP_USER_VERTEX_BUFFERS:
 141       return 0;
 142    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 143       return vscreen->caps.caps.v2.uniform_buffer_offset_alignment;
 144    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 145    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 146       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 147    case PIPE_CAP_START_INSTANCE:
 148       return vscreen->caps.caps.v1.bset.start_instance;
 149    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 150    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 151    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 152    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 153    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 154       return 0;
 155    case PIPE_CAP_QUERY_TIMESTAMP:
 156       return 1;
 157    case PIPE_CAP_QUERY_TIME_ELAPSED:
 158       return 0;
 159    case PIPE_CAP_TGSI_TEXCOORD:
 160       return 0;
 161    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 162       return VIRGL_MAP_BUFFER_ALIGNMENT;
 163    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 164       return vscreen->caps.caps.v1.max_tbo_size > 0;
 165    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 166       return vscreen->caps.caps.v2.texture_buffer_offset_alignment;
 167    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 168       return 0;
 169    case PIPE_CAP_CUBE_MAP_ARRAY:
 170       return vscreen->caps.caps.v1.bset.cube_map_array;
 171    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 172       return vscreen->caps.caps.v1.bset.texture_multisample;
 173    case PIPE_CAP_MAX_VIEWPORTS:
 174       return vscreen->caps.caps.v1.max_viewports;
 175    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 176       return vscreen->caps.caps.v1.max_tbo_size;
 177    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 178    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 179    case PIPE_CAP_ENDIANNESS:
 180       return 0;
 181    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 182    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 183       return 1;
 184    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 185       return 0;
 186    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 187       return vscreen->caps.caps.v2.max_geom_output_vertices;
 188    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 189       return vscreen->caps.caps.v2.max_geom_total_output_components;
 190    case PIPE_CAP_TEXTURE_QUERY_LOD:
 191       return vscreen->caps.caps.v1.bset.texture_query_lod;
 192    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 193       return vscreen->caps.caps.v1.max_texture_gather_components;
 194    case PIPE_CAP_DRAW_INDIRECT:
 195       return vscreen->caps.caps.v1.bset.has_indirect_draw;
 196    case PIPE_CAP_SAMPLE_SHADING:
 197    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 198       return vscreen->caps.caps.v1.bset.has_sample_shading;
 199    case PIPE_CAP_TEXTURE_GATHER_SM5:
 200    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 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_MULTI_DRAW_INDIRECT:
 206    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 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_SHAREABLE_SHADERS:
 223    case PIPE_CAP_CLEAR_TEXTURE:
 224    case PIPE_CAP_DRAW_PARAMETERS:
 225    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 226    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 227    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 228    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 229    case PIPE_CAP_INVALIDATE_BUFFER:
 230    case PIPE_CAP_GENERATE_MIPMAP:
 231    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 232    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 233    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 234    case PIPE_CAP_STRING_MARKER:
 235    case PIPE_CAP_QUERY_MEMORY_INFO:
 236    case PIPE_CAP_PCI_GROUP:
 237    case PIPE_CAP_PCI_BUS:
 238    case PIPE_CAP_PCI_DEVICE:
 239    case PIPE_CAP_PCI_FUNCTION:
 240    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 241    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 242    case PIPE_CAP_CULL_DISTANCE:
 243    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 244    case PIPE_CAP_TGSI_VOTE:
 245    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 246    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 247    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 248    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 249    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 250    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 251    case PIPE_CAP_TGSI_FS_FBFETCH:
 252    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 253    case PIPE_CAP_INT64:
 254    case PIPE_CAP_INT64_DIVMOD:
 255    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 256    case PIPE_CAP_TGSI_CLOCK:
 257    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 258    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 259    case PIPE_CAP_TGSI_BALLOT:
 260    case PIPE_CAP_DOUBLES:
 261    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 262    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 263    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 264    case PIPE_CAP_POST_DEPTH_COVERAGE:
 265    case PIPE_CAP_BINDLESS_TEXTURE:
 266    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 267    case PIPE_CAP_QUERY_SO_OVERFLOW:
 268    case PIPE_CAP_MEMOBJ:
 269    case PIPE_CAP_LOAD_CONSTBUF:
 270    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 271    case PIPE_CAP_TILE_RASTER_ORDER:
 272    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 273    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 274    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 275    case PIPE_CAP_FENCE_SIGNAL:
 276    case PIPE_CAP_CONSTBUF0_FLAGS:
 277       return 0;
 278    case PIPE_CAP_VENDOR_ID:
 279       return 0x1af4;
 280    case PIPE_CAP_DEVICE_ID:
 281       return 0x1010;
 282    case PIPE_CAP_ACCELERATED:
 283       return 1;
 284    case PIPE_CAP_UMA:
 285    case PIPE_CAP_VIDEO_MEMORY:
 286       return 0;
 287    case PIPE_CAP_NATIVE_FENCE_FD:
 288       return 0;
 289    }
 290    /* should only get here on unhandled cases */
 291    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 292    return 0;
 293 }
 294
 295 static int
 296 virgl_get_shader_param(struct pipe_screen *screen,
 297                        enum pipe_shader_type shader,
 298                        enum pipe_shader_cap param)
 299 {
 300    struct virgl_screen *vscreen = virgl_screen(screen);
 301    switch(shader)
 302    {
 303    case PIPE_SHADER_FRAGMENT:
 304    case PIPE_SHADER_VERTEX:
 305    case PIPE_SHADER_GEOMETRY:
 306       switch (param) {
 307       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 308       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 309       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 310       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 311          return INT_MAX;
 312       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 313       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 314       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 315          return 1;
 316       case PIPE_SHADER_CAP_MAX_INPUTS:
 317          if (vscreen->caps.caps.v1.glsl_level < 150)
 318             return vscreen->caps.caps.v2.max_vertex_attribs;
 319          return (shader == PIPE_SHADER_VERTEX ||
 320                  shader == PIPE_SHADER_GEOMETRY) ? vscreen->caps.caps.v2.max_vertex_attribs : 32;
 321       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 322          if (shader == PIPE_SHADER_FRAGMENT)
 323             return vscreen->caps.caps.v1.max_render_targets;
 324          return vscreen->caps.caps.v2.max_vertex_outputs;
 325      // case PIPE_SHADER_CAP_MAX_CONSTS:
 326      //    return 4096;
 327       case PIPE_SHADER_CAP_MAX_TEMPS:
 328          return 256;
 329       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 330          return vscreen->caps.caps.v1.max_uniform_blocks;
 331     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 332      //    return 1;
 333       case PIPE_SHADER_CAP_SUBROUTINES:
 334          return 1;
 335       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 336             return 16;
 337       case PIPE_SHADER_CAP_INTEGERS:
 338          return vscreen->caps.caps.v1.glsl_level >= 130;
 339       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 340          return 32;
 341       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 342          return 4096 * sizeof(float[4]);
 343       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 344       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 345       case PIPE_SHADER_CAP_INT64_ATOMICS:
 346       case PIPE_SHADER_CAP_FP16:
 347       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 348       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 349       default:
 350          return 0;
 351       }
 352    default:
 353       return 0;
 354    }
 355 }
 356
 357 static float
 358 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 359 {
 360    struct virgl_screen *vscreen = virgl_screen(screen);
 361    switch (param) {
 362    case PIPE_CAPF_MAX_LINE_WIDTH:
 363       return vscreen->caps.caps.v2.max_aliased_line_width;
 364    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 365       return vscreen->caps.caps.v2.max_smooth_line_width;
 366    case PIPE_CAPF_MAX_POINT_WIDTH:
 367       return vscreen->caps.caps.v2.max_aliased_point_size;
 368    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 369       return vscreen->caps.caps.v2.max_smooth_point_size;
 370    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 371       return 16.0;
 372    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 373       return vscreen->caps.caps.v2.max_texture_lod_bias;
 374    }
 375    /* should only get here on unhandled cases */
 376    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 377    return 0.0;
 378 }
 379
 380 static boolean
 381 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 382                                  enum pipe_format format)
 383 {
 384    struct virgl_screen *vscreen = virgl_screen(screen);
 385    const struct util_format_description *format_desc;
 386    int i;
 387
 388    format_desc = util_format_description(format);
 389    if (!format_desc)
 390       return FALSE;
 391
 392    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 393       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 394       int big = vformat / 32;
 395       int small = vformat % 32;
 396       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 397          return FALSE;
 398       return TRUE;
 399    }
 400
 401    /* Find the first non-VOID channel. */
 402    for (i = 0; i < 4; i++) {
 403       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 404          break;
 405       }
 406    }
 407
 408    if (i == 4)
 409       return FALSE;
 410
 411    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 412       return FALSE;
 413
 414    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 415       return FALSE;
 416    return TRUE;
 417 }
 418
 419 /**
 420  * Query format support for creating a texture, drawing surface, etc.
 421  * \param format  the format to test
 422  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 423  */
 424 static boolean
 425 virgl_is_format_supported( struct pipe_screen *screen,
 426                                  enum pipe_format format,
 427                                  enum pipe_texture_target target,
 428                                  unsigned sample_count,
 429                                  unsigned bind)
 430 {
 431    struct virgl_screen *vscreen = virgl_screen(screen);
 432    const struct util_format_description *format_desc;
 433    int i;
 434
 435    assert(target == PIPE_BUFFER ||
 436           target == PIPE_TEXTURE_1D ||
 437           target == PIPE_TEXTURE_1D_ARRAY ||
 438           target == PIPE_TEXTURE_2D ||
 439           target == PIPE_TEXTURE_2D_ARRAY ||
 440           target == PIPE_TEXTURE_RECT ||
 441           target == PIPE_TEXTURE_3D ||
 442           target == PIPE_TEXTURE_CUBE ||
 443           target == PIPE_TEXTURE_CUBE_ARRAY);
 444
 445    format_desc = util_format_description(format);
 446    if (!format_desc)
 447       return FALSE;
 448
 449    if (util_format_is_intensity(format))
 450       return FALSE;
 451
 452    if (sample_count > 1) {
 453       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 454          return FALSE;
 455       if (sample_count > vscreen->caps.caps.v1.max_samples)
 456          return FALSE;
 457    }
 458
 459    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 460       return virgl_is_vertex_format_supported(screen, format);
 461    }
 462
 463    if (bind & PIPE_BIND_RENDER_TARGET) {
 464       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 465          return FALSE;
 466
 467       /*
 468        * Although possible, it is unnatural to render into compressed or YUV
 469        * surfaces. So disable these here to avoid going into weird paths
 470        * inside the state trackers.
 471        */
 472       if (format_desc->block.width != 1 ||
 473           format_desc->block.height != 1)
 474          return FALSE;
 475
 476       {
 477          int big = format / 32;
 478          int small = format % 32;
 479          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 480             return FALSE;
 481       }
 482    }
 483
 484    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 485       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 486          return FALSE;
 487    }
 488
 489    /*
 490     * All other operations (sampling, transfer, etc).
 491     */
 492
 493    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 494       goto out_lookup;
 495    }
 496    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 497       goto out_lookup;
 498    }
 499    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 500       goto out_lookup;
 501    }
 502
 503    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 504       goto out_lookup;
 505    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 506       goto out_lookup;
 507    }
 508
 509    /* Find the first non-VOID channel. */
 510    for (i = 0; i < 4; i++) {
 511       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 512          break;
 513       }
 514    }
 515
 516    if (i == 4)
 517       return FALSE;
 518
 519    /* no L4A4 */
 520    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 521       return FALSE;
 522
 523  out_lookup:
 524    {
 525       int big = format / 32;
 526       int small = format % 32;
 527       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 528          return FALSE;
 529    }
 530    /*
 531     * Everything else should be supported by u_format.
 532     */
 533    return TRUE;
 534 }
 535
 536 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 537                                       struct pipe_resource *res,
 538                                       unsigned level, unsigned layer,
 539                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 540 {
 541    struct virgl_screen *vscreen = virgl_screen(screen);
 542    struct virgl_winsys *vws = vscreen->vws;
 543    struct virgl_resource *vres = virgl_resource(res);
 544
 545    if (vws->flush_frontbuffer)
 546       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 547                              sub_box);
 548 }
 549
 550 static void virgl_fence_reference(struct pipe_screen *screen,
 551                                   struct pipe_fence_handle **ptr,
 552                                   struct pipe_fence_handle *fence)
 553 {
 554    struct virgl_screen *vscreen = virgl_screen(screen);
 555    struct virgl_winsys *vws = vscreen->vws;
 556
 557    vws->fence_reference(vws, ptr, fence);
 558 }
 559
 560 static boolean virgl_fence_finish(struct pipe_screen *screen,
 561                                   struct pipe_context *ctx,
 562                                   struct pipe_fence_handle *fence,
 563                                   uint64_t timeout)
 564 {
 565    struct virgl_screen *vscreen = virgl_screen(screen);
 566    struct virgl_winsys *vws = vscreen->vws;
 567
 568    return vws->fence_wait(vws, fence, timeout);
 569 }
 570
 571 static uint64_t
 572 virgl_get_timestamp(struct pipe_screen *_screen)
 573 {
 574    return os_time_get_nano();
 575 }
 576
 577 static void
 578 virgl_destroy_screen(struct pipe_screen *screen)
 579 {
 580    struct virgl_screen *vscreen = virgl_screen(screen);
 581    struct virgl_winsys *vws = vscreen->vws;
 582
 583    slab_destroy_parent(&vscreen->texture_transfer_pool);
 584
 585    if (vws)
 586       vws->destroy(vws);
 587    FREE(vscreen);
 588 }
 589
 590 struct pipe_screen *
 591 virgl_create_screen(struct virgl_winsys *vws)
 592 {
 593    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 594
 595    if (!screen)
 596       return NULL;
 597
 598    screen->vws = vws;
 599    screen->base.get_name = virgl_get_name;
 600    screen->base.get_vendor = virgl_get_vendor;
 601    screen->base.get_param = virgl_get_param;
 602    screen->base.get_shader_param = virgl_get_shader_param;
 603    screen->base.get_paramf = virgl_get_paramf;
 604    screen->base.is_format_supported = virgl_is_format_supported;
 605    screen->base.destroy = virgl_destroy_screen;
 606    screen->base.context_create = virgl_context_create;
 607    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 608    screen->base.get_timestamp = virgl_get_timestamp;
 609    screen->base.fence_reference = virgl_fence_reference;
 610    //screen->base.fence_signalled = virgl_fence_signalled;
 611    screen->base.fence_finish = virgl_fence_finish;
 612
 613    virgl_init_screen_resource_functions(&screen->base);
 614
 615    vws->get_caps(vws, &screen->caps);
 616
 617    screen->refcnt = 1;
 618
 619    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 620
 621    return &screen->base;
 622 }