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_PIXEL_CENTER_HALF_INTEGER:
  92    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
  93       return 1;
  94    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
  95       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
  96    case PIPE_CAP_DEPTH_CLIP_DISABLE:
  97       return vscreen->caps.caps.v1.bset.depth_clip_disable;
  98    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
  99       return vscreen->caps.caps.v1.max_streamout_buffers;
 100    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 101    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 102       return 16*4;
 103    case PIPE_CAP_PRIMITIVE_RESTART:
 104       return vscreen->caps.caps.v1.bset.primitive_restart;
 105    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 106       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 107    case PIPE_CAP_TGSI_INSTANCEID:
 108    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 109       return 1;
 110    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 111       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 112    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 113       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 114    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 115       return vscreen->caps.caps.v1.max_texture_array_layers;
 116    case PIPE_CAP_MIN_TEXEL_OFFSET:
 117       return vscreen->caps.caps.v2.min_texel_offset;
 118    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 119       return vscreen->caps.caps.v2.min_texture_gather_offset;
 120    case PIPE_CAP_MAX_TEXEL_OFFSET:
 121       return vscreen->caps.caps.v2.max_texel_offset;
 122    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 123       return vscreen->caps.caps.v2.max_texture_gather_offset;
 124    case PIPE_CAP_CONDITIONAL_RENDER:
 125       return vscreen->caps.caps.v1.bset.conditional_render;
 126    case PIPE_CAP_TEXTURE_BARRIER:
 127       return 0;
 128    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 129       return 1;
 130    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 131    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 132       return vscreen->caps.caps.v1.bset.color_clamping;
 133    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 134       return 1;
 135    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 136       return vscreen->caps.caps.v1.glsl_level;
 137    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 138       return MIN2(vscreen->caps.caps.v1.glsl_level, 140);
 139    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 140       return 0;
 141    case PIPE_CAP_COMPUTE:
 142       return 0;
 143    case PIPE_CAP_USER_VERTEX_BUFFERS:
 144       return 0;
 145    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 146       return vscreen->caps.caps.v2.uniform_buffer_offset_alignment;
 147    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 148    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 149       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 150    case PIPE_CAP_START_INSTANCE:
 151       return vscreen->caps.caps.v1.bset.start_instance;
 152    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 153    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 154    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 155    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 156    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 157       return 0;
 158    case PIPE_CAP_QUERY_TIMESTAMP:
 159       return 1;
 160    case PIPE_CAP_QUERY_TIME_ELAPSED:
 161       return 0;
 162    case PIPE_CAP_TGSI_TEXCOORD:
 163       return 0;
 164    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 165       return VIRGL_MAP_BUFFER_ALIGNMENT;
 166    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 167       return vscreen->caps.caps.v1.max_tbo_size > 0;
 168    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 169       return vscreen->caps.caps.v2.texture_buffer_offset_alignment;
 170    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 171       return 0;
 172    case PIPE_CAP_CUBE_MAP_ARRAY:
 173       return vscreen->caps.caps.v1.bset.cube_map_array;
 174    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 175       return vscreen->caps.caps.v1.bset.texture_multisample;
 176    case PIPE_CAP_MAX_VIEWPORTS:
 177       return vscreen->caps.caps.v1.max_viewports;
 178    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 179       return vscreen->caps.caps.v1.max_tbo_size;
 180    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 181    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 182    case PIPE_CAP_ENDIANNESS:
 183       return 0;
 184    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 185    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 186       return 1;
 187    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 188       return 0;
 189    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 190       return vscreen->caps.caps.v2.max_geom_output_vertices;
 191    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 192       return vscreen->caps.caps.v2.max_geom_total_output_components;
 193    case PIPE_CAP_TEXTURE_QUERY_LOD:
 194       return vscreen->caps.caps.v1.bset.texture_query_lod;
 195    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 196       return vscreen->caps.caps.v1.max_texture_gather_components;
 197    case PIPE_CAP_DRAW_INDIRECT:
 198       return vscreen->caps.caps.v1.bset.has_indirect_draw;
 199    case PIPE_CAP_SAMPLE_SHADING:
 200    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 201       return vscreen->caps.caps.v1.bset.has_sample_shading;
 202    case PIPE_CAP_CULL_DISTANCE:
 203       return vscreen->caps.caps.v1.bset.has_cull;
 204    case PIPE_CAP_MAX_VERTEX_STREAMS:
 205       return vscreen->caps.caps.v1.glsl_level >= 400 ? 4 : 1;
 206    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 207       return vscreen->caps.caps.v1.bset.conditional_render_inverted;
 208    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 209       return vscreen->caps.caps.v1.bset.derivative_control;
 210    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 211       return vscreen->caps.caps.v1.bset.polygon_offset_clamp;
 212    case PIPE_CAP_QUERY_SO_OVERFLOW:
 213       return vscreen->caps.caps.v1.bset.transform_feedback_overflow_query;
 214    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 215       return vscreen->caps.caps.v2.shader_buffer_offset_alignment;
 216    case PIPE_CAP_DOUBLES:
 217       return vscreen->caps.caps.v1.bset.has_fp64;
 218    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 219       return vscreen->caps.caps.v2.max_shader_patch_varyings;
 220    case PIPE_CAP_TEXTURE_GATHER_SM5:
 221    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 222    case PIPE_CAP_FAKE_SW_MSAA:
 223    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 224    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 225    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 226    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 227    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 228    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 229    case PIPE_CAP_CLIP_HALFZ:
 230    case PIPE_CAP_VERTEXID_NOBASE:
 231    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 232    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 233    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 234    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 235    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 236    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 237    case PIPE_CAP_TGSI_TXQS:
 238    case PIPE_CAP_SHAREABLE_SHADERS:
 239    case PIPE_CAP_CLEAR_TEXTURE:
 240    case PIPE_CAP_DRAW_PARAMETERS:
 241    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 242    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 243    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 244    case PIPE_CAP_INVALIDATE_BUFFER:
 245    case PIPE_CAP_GENERATE_MIPMAP:
 246    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 247    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 248    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 249    case PIPE_CAP_STRING_MARKER:
 250    case PIPE_CAP_QUERY_MEMORY_INFO:
 251    case PIPE_CAP_PCI_GROUP:
 252    case PIPE_CAP_PCI_BUS:
 253    case PIPE_CAP_PCI_DEVICE:
 254    case PIPE_CAP_PCI_FUNCTION:
 255    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 256    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 257    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 258    case PIPE_CAP_TGSI_VOTE:
 259    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 260    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 261    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 262    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 263    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 264    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 265    case PIPE_CAP_TGSI_FS_FBFETCH:
 266    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 267    case PIPE_CAP_INT64:
 268    case PIPE_CAP_INT64_DIVMOD:
 269    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 270    case PIPE_CAP_TGSI_CLOCK:
 271    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 272    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 273    case PIPE_CAP_TGSI_BALLOT:
 274    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 275    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 276    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 277    case PIPE_CAP_POST_DEPTH_COVERAGE:
 278    case PIPE_CAP_BINDLESS_TEXTURE:
 279    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 280    case PIPE_CAP_MEMOBJ:
 281    case PIPE_CAP_LOAD_CONSTBUF:
 282    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 283    case PIPE_CAP_TILE_RASTER_ORDER:
 284    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 285    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 286    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 287    case PIPE_CAP_FENCE_SIGNAL:
 288    case PIPE_CAP_CONSTBUF0_FLAGS:
 289    case PIPE_CAP_PACKED_UNIFORMS:
 290    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 291    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 292    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 293    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 294    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 295    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 296       return 0;
 297    case PIPE_CAP_VENDOR_ID:
 298       return 0x1af4;
 299    case PIPE_CAP_DEVICE_ID:
 300       return 0x1010;
 301    case PIPE_CAP_ACCELERATED:
 302       return 1;
 303    case PIPE_CAP_UMA:
 304    case PIPE_CAP_VIDEO_MEMORY:
 305       return 0;
 306    case PIPE_CAP_NATIVE_FENCE_FD:
 307       return 0;
 308    }
 309    /* should only get here on unhandled cases */
 310    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 311    return 0;
 312 }
 313
 314 static int
 315 virgl_get_shader_param(struct pipe_screen *screen,
 316                        enum pipe_shader_type shader,
 317                        enum pipe_shader_cap param)
 318 {
 319    struct virgl_screen *vscreen = virgl_screen(screen);
 320
 321    if ((shader == PIPE_SHADER_TESS_CTRL || shader == PIPE_SHADER_TESS_EVAL) &&
 322        !vscreen->caps.caps.v1.bset.has_tessellation_shaders)
 323       return 0;
 324
 325    switch(shader)
 326    {
 327    case PIPE_SHADER_FRAGMENT:
 328    case PIPE_SHADER_VERTEX:
 329    case PIPE_SHADER_GEOMETRY:
 330    case PIPE_SHADER_TESS_CTRL:
 331    case PIPE_SHADER_TESS_EVAL:
 332       switch (param) {
 333       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 334       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 335       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 336       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 337          return INT_MAX;
 338       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 339       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 340       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 341          return 1;
 342       case PIPE_SHADER_CAP_MAX_INPUTS:
 343          if (vscreen->caps.caps.v1.glsl_level < 150)
 344             return vscreen->caps.caps.v2.max_vertex_attribs;
 345          return (shader == PIPE_SHADER_VERTEX ||
 346                  shader == PIPE_SHADER_GEOMETRY) ? vscreen->caps.caps.v2.max_vertex_attribs : 32;
 347       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 348          if (shader == PIPE_SHADER_FRAGMENT)
 349             return vscreen->caps.caps.v1.max_render_targets;
 350          return vscreen->caps.caps.v2.max_vertex_outputs;
 351      // case PIPE_SHADER_CAP_MAX_CONSTS:
 352      //    return 4096;
 353       case PIPE_SHADER_CAP_MAX_TEMPS:
 354          return 256;
 355       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 356          return vscreen->caps.caps.v1.max_uniform_blocks;
 357     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 358      //    return 1;
 359       case PIPE_SHADER_CAP_SUBROUTINES:
 360          return 1;
 361       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 362             return 16;
 363       case PIPE_SHADER_CAP_INTEGERS:
 364          return vscreen->caps.caps.v1.glsl_level >= 130;
 365       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 366          return 32;
 367       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 368          return 4096 * sizeof(float[4]);
 369       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 370       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 371       case PIPE_SHADER_CAP_INT64_ATOMICS:
 372       case PIPE_SHADER_CAP_FP16:
 373       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 374       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 375       default:
 376          return 0;
 377       }
 378    default:
 379       return 0;
 380    }
 381 }
 382
 383 static float
 384 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 385 {
 386    struct virgl_screen *vscreen = virgl_screen(screen);
 387    switch (param) {
 388    case PIPE_CAPF_MAX_LINE_WIDTH:
 389       return vscreen->caps.caps.v2.max_aliased_line_width;
 390    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 391       return vscreen->caps.caps.v2.max_smooth_line_width;
 392    case PIPE_CAPF_MAX_POINT_WIDTH:
 393       return vscreen->caps.caps.v2.max_aliased_point_size;
 394    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 395       return vscreen->caps.caps.v2.max_smooth_point_size;
 396    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 397       return 16.0;
 398    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 399       return vscreen->caps.caps.v2.max_texture_lod_bias;
 400    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 401    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 402    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 403       return 0.0f;
 404    }
 405    /* should only get here on unhandled cases */
 406    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 407    return 0.0;
 408 }
 409
 410 static boolean
 411 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 412                                  enum pipe_format format)
 413 {
 414    struct virgl_screen *vscreen = virgl_screen(screen);
 415    const struct util_format_description *format_desc;
 416    int i;
 417
 418    format_desc = util_format_description(format);
 419    if (!format_desc)
 420       return FALSE;
 421
 422    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 423       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 424       int big = vformat / 32;
 425       int small = vformat % 32;
 426       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 427          return FALSE;
 428       return TRUE;
 429    }
 430
 431    /* Find the first non-VOID channel. */
 432    for (i = 0; i < 4; i++) {
 433       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 434          break;
 435       }
 436    }
 437
 438    if (i == 4)
 439       return FALSE;
 440
 441    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 442       return FALSE;
 443
 444    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 445       return FALSE;
 446    return TRUE;
 447 }
 448
 449 /**
 450  * Query format support for creating a texture, drawing surface, etc.
 451  * \param format  the format to test
 452  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 453  */
 454 static boolean
 455 virgl_is_format_supported( struct pipe_screen *screen,
 456                                  enum pipe_format format,
 457                                  enum pipe_texture_target target,
 458                                  unsigned sample_count,
 459                                  unsigned bind)
 460 {
 461    struct virgl_screen *vscreen = virgl_screen(screen);
 462    const struct util_format_description *format_desc;
 463    int i;
 464
 465    assert(target == PIPE_BUFFER ||
 466           target == PIPE_TEXTURE_1D ||
 467           target == PIPE_TEXTURE_1D_ARRAY ||
 468           target == PIPE_TEXTURE_2D ||
 469           target == PIPE_TEXTURE_2D_ARRAY ||
 470           target == PIPE_TEXTURE_RECT ||
 471           target == PIPE_TEXTURE_3D ||
 472           target == PIPE_TEXTURE_CUBE ||
 473           target == PIPE_TEXTURE_CUBE_ARRAY);
 474
 475    format_desc = util_format_description(format);
 476    if (!format_desc)
 477       return FALSE;
 478
 479    if (util_format_is_intensity(format))
 480       return FALSE;
 481
 482    if (sample_count > 1) {
 483       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 484          return FALSE;
 485       if (sample_count > vscreen->caps.caps.v1.max_samples)
 486          return FALSE;
 487    }
 488
 489    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 490       return virgl_is_vertex_format_supported(screen, format);
 491    }
 492
 493    if (bind & PIPE_BIND_RENDER_TARGET) {
 494       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 495          return FALSE;
 496
 497       /*
 498        * Although possible, it is unnatural to render into compressed or YUV
 499        * surfaces. So disable these here to avoid going into weird paths
 500        * inside the state trackers.
 501        */
 502       if (format_desc->block.width != 1 ||
 503           format_desc->block.height != 1)
 504          return FALSE;
 505
 506       {
 507          int big = format / 32;
 508          int small = format % 32;
 509          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 510             return FALSE;
 511       }
 512    }
 513
 514    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 515       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 516          return FALSE;
 517    }
 518
 519    /*
 520     * All other operations (sampling, transfer, etc).
 521     */
 522
 523    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 524       goto out_lookup;
 525    }
 526    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 527       goto out_lookup;
 528    }
 529    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 530       goto out_lookup;
 531    }
 532
 533    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 534       goto out_lookup;
 535    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 536       goto out_lookup;
 537    }
 538
 539    /* Find the first non-VOID channel. */
 540    for (i = 0; i < 4; i++) {
 541       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 542          break;
 543       }
 544    }
 545
 546    if (i == 4)
 547       return FALSE;
 548
 549    /* no L4A4 */
 550    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 551       return FALSE;
 552
 553  out_lookup:
 554    {
 555       int big = format / 32;
 556       int small = format % 32;
 557       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 558          return FALSE;
 559    }
 560    /*
 561     * Everything else should be supported by u_format.
 562     */
 563    return TRUE;
 564 }
 565
 566 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 567                                       struct pipe_resource *res,
 568                                       unsigned level, unsigned layer,
 569                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 570 {
 571    struct virgl_screen *vscreen = virgl_screen(screen);
 572    struct virgl_winsys *vws = vscreen->vws;
 573    struct virgl_resource *vres = virgl_resource(res);
 574
 575    if (vws->flush_frontbuffer)
 576       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 577                              sub_box);
 578 }
 579
 580 static void virgl_fence_reference(struct pipe_screen *screen,
 581                                   struct pipe_fence_handle **ptr,
 582                                   struct pipe_fence_handle *fence)
 583 {
 584    struct virgl_screen *vscreen = virgl_screen(screen);
 585    struct virgl_winsys *vws = vscreen->vws;
 586
 587    vws->fence_reference(vws, ptr, fence);
 588 }
 589
 590 static boolean virgl_fence_finish(struct pipe_screen *screen,
 591                                   struct pipe_context *ctx,
 592                                   struct pipe_fence_handle *fence,
 593                                   uint64_t timeout)
 594 {
 595    struct virgl_screen *vscreen = virgl_screen(screen);
 596    struct virgl_winsys *vws = vscreen->vws;
 597
 598    return vws->fence_wait(vws, fence, timeout);
 599 }
 600
 601 static uint64_t
 602 virgl_get_timestamp(struct pipe_screen *_screen)
 603 {
 604    return os_time_get_nano();
 605 }
 606
 607 static void
 608 virgl_destroy_screen(struct pipe_screen *screen)
 609 {
 610    struct virgl_screen *vscreen = virgl_screen(screen);
 611    struct virgl_winsys *vws = vscreen->vws;
 612
 613    slab_destroy_parent(&vscreen->texture_transfer_pool);
 614
 615    if (vws)
 616       vws->destroy(vws);
 617    FREE(vscreen);
 618 }
 619
 620 struct pipe_screen *
 621 virgl_create_screen(struct virgl_winsys *vws)
 622 {
 623    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 624
 625    if (!screen)
 626       return NULL;
 627
 628    screen->vws = vws;
 629    screen->base.get_name = virgl_get_name;
 630    screen->base.get_vendor = virgl_get_vendor;
 631    screen->base.get_param = virgl_get_param;
 632    screen->base.get_shader_param = virgl_get_shader_param;
 633    screen->base.get_paramf = virgl_get_paramf;
 634    screen->base.is_format_supported = virgl_is_format_supported;
 635    screen->base.destroy = virgl_destroy_screen;
 636    screen->base.context_create = virgl_context_create;
 637    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 638    screen->base.get_timestamp = virgl_get_timestamp;
 639    screen->base.fence_reference = virgl_fence_reference;
 640    //screen->base.fence_signalled = virgl_fence_signalled;
 641    screen->base.fence_finish = virgl_fence_finish;
 642
 643    virgl_init_screen_resource_functions(&screen->base);
 644
 645    vws->get_caps(vws, &screen->caps);
 646
 647    screen->refcnt = 1;
 648
 649    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 650
 651    return &screen->base;
 652 }