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_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 137       return MIN2(vscreen->caps.caps.v1.glsl_level, 140);
 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_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 145       return vscreen->caps.caps.v2.uniform_buffer_offset_alignment;
 146    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 147    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 148       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 149    case PIPE_CAP_START_INSTANCE:
 150       return vscreen->caps.caps.v1.bset.start_instance;
 151    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 152    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 153    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 154    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 155    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 156       return 0;
 157    case PIPE_CAP_QUERY_TIMESTAMP:
 158       return 1;
 159    case PIPE_CAP_QUERY_TIME_ELAPSED:
 160       return 0;
 161    case PIPE_CAP_TGSI_TEXCOORD:
 162       return 0;
 163    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 164       return VIRGL_MAP_BUFFER_ALIGNMENT;
 165    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 166       return vscreen->caps.caps.v1.max_tbo_size > 0;
 167    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 168       return vscreen->caps.caps.v2.texture_buffer_offset_alignment;
 169    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 170       return 0;
 171    case PIPE_CAP_CUBE_MAP_ARRAY:
 172       return vscreen->caps.caps.v1.bset.cube_map_array;
 173    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 174       return vscreen->caps.caps.v1.bset.texture_multisample;
 175    case PIPE_CAP_MAX_VIEWPORTS:
 176       return vscreen->caps.caps.v1.max_viewports;
 177    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 178       return vscreen->caps.caps.v1.max_tbo_size;
 179    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 180    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 181    case PIPE_CAP_ENDIANNESS:
 182       return 0;
 183    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 184    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 185       return 1;
 186    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 187       return 0;
 188    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 189       return vscreen->caps.caps.v2.max_geom_output_vertices;
 190    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 191       return vscreen->caps.caps.v2.max_geom_total_output_components;
 192    case PIPE_CAP_TEXTURE_QUERY_LOD:
 193       return vscreen->caps.caps.v1.bset.texture_query_lod;
 194    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 195       return vscreen->caps.caps.v1.max_texture_gather_components;
 196    case PIPE_CAP_DRAW_INDIRECT:
 197       return vscreen->caps.caps.v1.bset.has_indirect_draw;
 198    case PIPE_CAP_SAMPLE_SHADING:
 199    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 200       return vscreen->caps.caps.v1.bset.has_sample_shading;
 201    case PIPE_CAP_CULL_DISTANCE:
 202       return vscreen->caps.caps.v1.bset.has_cull;
 203    case PIPE_CAP_MAX_VERTEX_STREAMS:
 204       return vscreen->caps.caps.v1.glsl_level >= 400 ? 4 : 1;
 205    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 206       return vscreen->caps.caps.v1.bset.conditional_render_inverted;
 207    case PIPE_CAP_TEXTURE_GATHER_SM5:
 208    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 209    case PIPE_CAP_FAKE_SW_MSAA:
 210    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 211    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 212    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 213    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 214    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 215    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 216    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 217    case PIPE_CAP_CLIP_HALFZ:
 218    case PIPE_CAP_VERTEXID_NOBASE:
 219    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 220    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 221    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 222    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 223    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 224    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 225    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 226    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 227    case PIPE_CAP_TGSI_TXQS:
 228    case PIPE_CAP_SHAREABLE_SHADERS:
 229    case PIPE_CAP_CLEAR_TEXTURE:
 230    case PIPE_CAP_DRAW_PARAMETERS:
 231    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 232    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 233    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 234    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 235    case PIPE_CAP_INVALIDATE_BUFFER:
 236    case PIPE_CAP_GENERATE_MIPMAP:
 237    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 238    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 239    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 240    case PIPE_CAP_STRING_MARKER:
 241    case PIPE_CAP_QUERY_MEMORY_INFO:
 242    case PIPE_CAP_PCI_GROUP:
 243    case PIPE_CAP_PCI_BUS:
 244    case PIPE_CAP_PCI_DEVICE:
 245    case PIPE_CAP_PCI_FUNCTION:
 246    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 247    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 248    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 249    case PIPE_CAP_TGSI_VOTE:
 250    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 251    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 252    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 253    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 254    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 255    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 256    case PIPE_CAP_TGSI_FS_FBFETCH:
 257    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 258    case PIPE_CAP_INT64:
 259    case PIPE_CAP_INT64_DIVMOD:
 260    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 261    case PIPE_CAP_TGSI_CLOCK:
 262    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 263    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 264    case PIPE_CAP_TGSI_BALLOT:
 265    case PIPE_CAP_DOUBLES:
 266    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 267    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 268    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 269    case PIPE_CAP_POST_DEPTH_COVERAGE:
 270    case PIPE_CAP_BINDLESS_TEXTURE:
 271    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 272    case PIPE_CAP_QUERY_SO_OVERFLOW:
 273    case PIPE_CAP_MEMOBJ:
 274    case PIPE_CAP_LOAD_CONSTBUF:
 275    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 276    case PIPE_CAP_TILE_RASTER_ORDER:
 277    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 278    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 279    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 280    case PIPE_CAP_FENCE_SIGNAL:
 281    case PIPE_CAP_CONSTBUF0_FLAGS:
 282    case PIPE_CAP_PACKED_UNIFORMS:
 283    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 284    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 285    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 286    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 287    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 288    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 289       return 0;
 290    case PIPE_CAP_VENDOR_ID:
 291       return 0x1af4;
 292    case PIPE_CAP_DEVICE_ID:
 293       return 0x1010;
 294    case PIPE_CAP_ACCELERATED:
 295       return 1;
 296    case PIPE_CAP_UMA:
 297    case PIPE_CAP_VIDEO_MEMORY:
 298       return 0;
 299    case PIPE_CAP_NATIVE_FENCE_FD:
 300       return 0;
 301    }
 302    /* should only get here on unhandled cases */
 303    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 304    return 0;
 305 }
 306
 307 static int
 308 virgl_get_shader_param(struct pipe_screen *screen,
 309                        enum pipe_shader_type shader,
 310                        enum pipe_shader_cap param)
 311 {
 312    struct virgl_screen *vscreen = virgl_screen(screen);
 313    switch(shader)
 314    {
 315    case PIPE_SHADER_FRAGMENT:
 316    case PIPE_SHADER_VERTEX:
 317    case PIPE_SHADER_GEOMETRY:
 318       switch (param) {
 319       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 320       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 321       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 322       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 323          return INT_MAX;
 324       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 325       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 326       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 327          return 1;
 328       case PIPE_SHADER_CAP_MAX_INPUTS:
 329          if (vscreen->caps.caps.v1.glsl_level < 150)
 330             return vscreen->caps.caps.v2.max_vertex_attribs;
 331          return (shader == PIPE_SHADER_VERTEX ||
 332                  shader == PIPE_SHADER_GEOMETRY) ? vscreen->caps.caps.v2.max_vertex_attribs : 32;
 333       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 334          if (shader == PIPE_SHADER_FRAGMENT)
 335             return vscreen->caps.caps.v1.max_render_targets;
 336          return vscreen->caps.caps.v2.max_vertex_outputs;
 337      // case PIPE_SHADER_CAP_MAX_CONSTS:
 338      //    return 4096;
 339       case PIPE_SHADER_CAP_MAX_TEMPS:
 340          return 256;
 341       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 342          return vscreen->caps.caps.v1.max_uniform_blocks;
 343     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 344      //    return 1;
 345       case PIPE_SHADER_CAP_SUBROUTINES:
 346          return 1;
 347       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 348             return 16;
 349       case PIPE_SHADER_CAP_INTEGERS:
 350          return vscreen->caps.caps.v1.glsl_level >= 130;
 351       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 352          return 32;
 353       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 354          return 4096 * sizeof(float[4]);
 355       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 356       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 357       case PIPE_SHADER_CAP_INT64_ATOMICS:
 358       case PIPE_SHADER_CAP_FP16:
 359       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 360       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 361       default:
 362          return 0;
 363       }
 364    default:
 365       return 0;
 366    }
 367 }
 368
 369 static float
 370 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 371 {
 372    struct virgl_screen *vscreen = virgl_screen(screen);
 373    switch (param) {
 374    case PIPE_CAPF_MAX_LINE_WIDTH:
 375       return vscreen->caps.caps.v2.max_aliased_line_width;
 376    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 377       return vscreen->caps.caps.v2.max_smooth_line_width;
 378    case PIPE_CAPF_MAX_POINT_WIDTH:
 379       return vscreen->caps.caps.v2.max_aliased_point_size;
 380    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 381       return vscreen->caps.caps.v2.max_smooth_point_size;
 382    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 383       return 16.0;
 384    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 385       return vscreen->caps.caps.v2.max_texture_lod_bias;
 386    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 387    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 388    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 389       return 0.0f;
 390    }
 391    /* should only get here on unhandled cases */
 392    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 393    return 0.0;
 394 }
 395
 396 static boolean
 397 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 398                                  enum pipe_format format)
 399 {
 400    struct virgl_screen *vscreen = virgl_screen(screen);
 401    const struct util_format_description *format_desc;
 402    int i;
 403
 404    format_desc = util_format_description(format);
 405    if (!format_desc)
 406       return FALSE;
 407
 408    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 409       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 410       int big = vformat / 32;
 411       int small = vformat % 32;
 412       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 413          return FALSE;
 414       return TRUE;
 415    }
 416
 417    /* Find the first non-VOID channel. */
 418    for (i = 0; i < 4; i++) {
 419       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 420          break;
 421       }
 422    }
 423
 424    if (i == 4)
 425       return FALSE;
 426
 427    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 428       return FALSE;
 429
 430    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 431       return FALSE;
 432    return TRUE;
 433 }
 434
 435 /**
 436  * Query format support for creating a texture, drawing surface, etc.
 437  * \param format  the format to test
 438  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 439  */
 440 static boolean
 441 virgl_is_format_supported( struct pipe_screen *screen,
 442                                  enum pipe_format format,
 443                                  enum pipe_texture_target target,
 444                                  unsigned sample_count,
 445                                  unsigned bind)
 446 {
 447    struct virgl_screen *vscreen = virgl_screen(screen);
 448    const struct util_format_description *format_desc;
 449    int i;
 450
 451    assert(target == PIPE_BUFFER ||
 452           target == PIPE_TEXTURE_1D ||
 453           target == PIPE_TEXTURE_1D_ARRAY ||
 454           target == PIPE_TEXTURE_2D ||
 455           target == PIPE_TEXTURE_2D_ARRAY ||
 456           target == PIPE_TEXTURE_RECT ||
 457           target == PIPE_TEXTURE_3D ||
 458           target == PIPE_TEXTURE_CUBE ||
 459           target == PIPE_TEXTURE_CUBE_ARRAY);
 460
 461    format_desc = util_format_description(format);
 462    if (!format_desc)
 463       return FALSE;
 464
 465    if (util_format_is_intensity(format))
 466       return FALSE;
 467
 468    if (sample_count > 1) {
 469       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 470          return FALSE;
 471       if (sample_count > vscreen->caps.caps.v1.max_samples)
 472          return FALSE;
 473    }
 474
 475    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 476       return virgl_is_vertex_format_supported(screen, format);
 477    }
 478
 479    if (bind & PIPE_BIND_RENDER_TARGET) {
 480       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 481          return FALSE;
 482
 483       /*
 484        * Although possible, it is unnatural to render into compressed or YUV
 485        * surfaces. So disable these here to avoid going into weird paths
 486        * inside the state trackers.
 487        */
 488       if (format_desc->block.width != 1 ||
 489           format_desc->block.height != 1)
 490          return FALSE;
 491
 492       {
 493          int big = format / 32;
 494          int small = format % 32;
 495          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 496             return FALSE;
 497       }
 498    }
 499
 500    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 501       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 502          return FALSE;
 503    }
 504
 505    /*
 506     * All other operations (sampling, transfer, etc).
 507     */
 508
 509    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 510       goto out_lookup;
 511    }
 512    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 513       goto out_lookup;
 514    }
 515    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 516       goto out_lookup;
 517    }
 518
 519    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 520       goto out_lookup;
 521    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 522       goto out_lookup;
 523    }
 524
 525    /* Find the first non-VOID channel. */
 526    for (i = 0; i < 4; i++) {
 527       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 528          break;
 529       }
 530    }
 531
 532    if (i == 4)
 533       return FALSE;
 534
 535    /* no L4A4 */
 536    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 537       return FALSE;
 538
 539  out_lookup:
 540    {
 541       int big = format / 32;
 542       int small = format % 32;
 543       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 544          return FALSE;
 545    }
 546    /*
 547     * Everything else should be supported by u_format.
 548     */
 549    return TRUE;
 550 }
 551
 552 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 553                                       struct pipe_resource *res,
 554                                       unsigned level, unsigned layer,
 555                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 556 {
 557    struct virgl_screen *vscreen = virgl_screen(screen);
 558    struct virgl_winsys *vws = vscreen->vws;
 559    struct virgl_resource *vres = virgl_resource(res);
 560
 561    if (vws->flush_frontbuffer)
 562       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 563                              sub_box);
 564 }
 565
 566 static void virgl_fence_reference(struct pipe_screen *screen,
 567                                   struct pipe_fence_handle **ptr,
 568                                   struct pipe_fence_handle *fence)
 569 {
 570    struct virgl_screen *vscreen = virgl_screen(screen);
 571    struct virgl_winsys *vws = vscreen->vws;
 572
 573    vws->fence_reference(vws, ptr, fence);
 574 }
 575
 576 static boolean virgl_fence_finish(struct pipe_screen *screen,
 577                                   struct pipe_context *ctx,
 578                                   struct pipe_fence_handle *fence,
 579                                   uint64_t timeout)
 580 {
 581    struct virgl_screen *vscreen = virgl_screen(screen);
 582    struct virgl_winsys *vws = vscreen->vws;
 583
 584    return vws->fence_wait(vws, fence, timeout);
 585 }
 586
 587 static uint64_t
 588 virgl_get_timestamp(struct pipe_screen *_screen)
 589 {
 590    return os_time_get_nano();
 591 }
 592
 593 static void
 594 virgl_destroy_screen(struct pipe_screen *screen)
 595 {
 596    struct virgl_screen *vscreen = virgl_screen(screen);
 597    struct virgl_winsys *vws = vscreen->vws;
 598
 599    slab_destroy_parent(&vscreen->texture_transfer_pool);
 600
 601    if (vws)
 602       vws->destroy(vws);
 603    FREE(vscreen);
 604 }
 605
 606 struct pipe_screen *
 607 virgl_create_screen(struct virgl_winsys *vws)
 608 {
 609    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 610
 611    if (!screen)
 612       return NULL;
 613
 614    screen->vws = vws;
 615    screen->base.get_name = virgl_get_name;
 616    screen->base.get_vendor = virgl_get_vendor;
 617    screen->base.get_param = virgl_get_param;
 618    screen->base.get_shader_param = virgl_get_shader_param;
 619    screen->base.get_paramf = virgl_get_paramf;
 620    screen->base.is_format_supported = virgl_is_format_supported;
 621    screen->base.destroy = virgl_destroy_screen;
 622    screen->base.context_create = virgl_context_create;
 623    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 624    screen->base.get_timestamp = virgl_get_timestamp;
 625    screen->base.fence_reference = virgl_fence_reference;
 626    //screen->base.fence_signalled = virgl_fence_signalled;
 627    screen->base.fence_finish = virgl_fence_finish;
 628
 629    virgl_init_screen_resource_functions(&screen->base);
 630
 631    vws->get_caps(vws, &screen->caps);
 632
 633    screen->refcnt = 1;
 634
 635    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 636
 637    return &screen->base;
 638 }