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/u_math.h"
  28 #include "util/os_time.h"
  29 #include "pipe/p_defines.h"
  30 #include "pipe/p_screen.h"
  31
  32 #include "tgsi/tgsi_exec.h"
  33
  34 #include "virgl_screen.h"
  35 #include "virgl_resource.h"
  36 #include "virgl_public.h"
  37 #include "virgl_context.h"
  38
  39 static const char *
  40 virgl_get_vendor(struct pipe_screen *screen)
  41 {
  42    return "Red Hat";
  43 }
  44
  45
  46 static const char *
  47 virgl_get_name(struct pipe_screen *screen)
  48 {
  49    return "virgl";
  50 }
  51
  52 static int
  53 virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
  54 {
  55    struct virgl_screen *vscreen = virgl_screen(screen);
  56    switch (param) {
  57    case PIPE_CAP_NPOT_TEXTURES:
  58       return 1;
  59    case PIPE_CAP_SM3:
  60       return 1;
  61    case PIPE_CAP_ANISOTROPIC_FILTER:
  62       return 1;
  63    case PIPE_CAP_POINT_SPRITE:
  64       return 1;
  65    case PIPE_CAP_MAX_RENDER_TARGETS:
  66       return vscreen->caps.caps.v1.max_render_targets;
  67    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  68       return vscreen->caps.caps.v1.max_dual_source_render_targets;
  69    case PIPE_CAP_OCCLUSION_QUERY:
  70       return vscreen->caps.caps.v1.bset.occlusion_query;
  71    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  72    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  73       return vscreen->caps.caps.v1.bset.mirror_clamp;
  74    case PIPE_CAP_TEXTURE_SWIZZLE:
  75       return 1;
  76    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  77       if (vscreen->caps.caps.v2.max_texture_2d_size)
  78          return 1 + util_logbase2(vscreen->caps.caps.v2.max_texture_2d_size);
  79       return 15; /* 16K x 16K */
  80    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  81       if (vscreen->caps.caps.v2.max_texture_3d_size)
  82          return 1 + util_logbase2(vscreen->caps.caps.v2.max_texture_3d_size);
  83       return 9; /* 256 x 256 x 256 */
  84    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  85       if (vscreen->caps.caps.v2.max_texture_cube_size)
  86          return 1 + util_logbase2(vscreen->caps.caps.v2.max_texture_cube_size);
  87       return 13; /* 4K x 4K */
  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_PIXEL_CENTER_HALF_INTEGER:
  96    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
  97       return 1;
  98    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
  99       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
 100    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 101       return vscreen->caps.caps.v1.bset.depth_clip_disable;
 102    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 103       return vscreen->caps.caps.v1.max_streamout_buffers;
 104    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 105    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 106       return 16*4;
 107    case PIPE_CAP_PRIMITIVE_RESTART:
 108       return vscreen->caps.caps.v1.bset.primitive_restart;
 109    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 110       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 111    case PIPE_CAP_TGSI_INSTANCEID:
 112    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 113       return 1;
 114    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 115       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 116    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 117       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 118    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 119       return vscreen->caps.caps.v1.max_texture_array_layers;
 120    case PIPE_CAP_MIN_TEXEL_OFFSET:
 121       return vscreen->caps.caps.v2.min_texel_offset;
 122    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 123       return vscreen->caps.caps.v2.min_texture_gather_offset;
 124    case PIPE_CAP_MAX_TEXEL_OFFSET:
 125       return vscreen->caps.caps.v2.max_texel_offset;
 126    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 127       return vscreen->caps.caps.v2.max_texture_gather_offset;
 128    case PIPE_CAP_CONDITIONAL_RENDER:
 129       return vscreen->caps.caps.v1.bset.conditional_render;
 130    case PIPE_CAP_TEXTURE_BARRIER:
 131       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TEXTURE_BARRIER;
 132    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 133       return 1;
 134    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 135    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 136       return vscreen->caps.caps.v1.bset.color_clamping;
 137    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 138       return 1;
 139    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 140       return vscreen->caps.caps.v1.glsl_level;
 141    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 142       return MIN2(vscreen->caps.caps.v1.glsl_level, 140);
 143    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 144       return 0;
 145    case PIPE_CAP_COMPUTE:
 146       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER;
 147    case PIPE_CAP_USER_VERTEX_BUFFERS:
 148       return 0;
 149    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 150       return vscreen->caps.caps.v2.uniform_buffer_offset_alignment;
 151    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 152    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 153       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 154    case PIPE_CAP_START_INSTANCE:
 155       return vscreen->caps.caps.v1.bset.start_instance;
 156    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 157    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 158    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 159    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 160    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 161       return 0;
 162    case PIPE_CAP_QUERY_TIMESTAMP:
 163       return 1;
 164    case PIPE_CAP_QUERY_TIME_ELAPSED:
 165       return 0;
 166    case PIPE_CAP_TGSI_TEXCOORD:
 167       return 0;
 168    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 169       return VIRGL_MAP_BUFFER_ALIGNMENT;
 170    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 171       return vscreen->caps.caps.v1.max_tbo_size > 0;
 172    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 173       return vscreen->caps.caps.v2.texture_buffer_offset_alignment;
 174    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 175       return 0;
 176    case PIPE_CAP_CUBE_MAP_ARRAY:
 177       return vscreen->caps.caps.v1.bset.cube_map_array;
 178    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 179       return vscreen->caps.caps.v1.bset.texture_multisample;
 180    case PIPE_CAP_MAX_VIEWPORTS:
 181       return vscreen->caps.caps.v1.max_viewports;
 182    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 183       return vscreen->caps.caps.v1.max_tbo_size;
 184    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 185    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 186    case PIPE_CAP_ENDIANNESS:
 187       return 0;
 188    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 189    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 190       return 1;
 191    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 192       return 0;
 193    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 194       return vscreen->caps.caps.v2.max_geom_output_vertices;
 195    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 196       return vscreen->caps.caps.v2.max_geom_total_output_components;
 197    case PIPE_CAP_TEXTURE_QUERY_LOD:
 198       return vscreen->caps.caps.v1.bset.texture_query_lod;
 199    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 200       return vscreen->caps.caps.v1.max_texture_gather_components;
 201    case PIPE_CAP_DRAW_INDIRECT:
 202       return vscreen->caps.caps.v1.bset.has_indirect_draw;
 203    case PIPE_CAP_SAMPLE_SHADING:
 204    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 205       return vscreen->caps.caps.v1.bset.has_sample_shading;
 206    case PIPE_CAP_CULL_DISTANCE:
 207       return vscreen->caps.caps.v1.bset.has_cull;
 208    case PIPE_CAP_MAX_VERTEX_STREAMS:
 209       return vscreen->caps.caps.v1.glsl_level >= 400 ? 4 : 1;
 210    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 211       return vscreen->caps.caps.v1.bset.conditional_render_inverted;
 212    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 213       return vscreen->caps.caps.v1.bset.derivative_control;
 214    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 215       return vscreen->caps.caps.v1.bset.polygon_offset_clamp;
 216    case PIPE_CAP_QUERY_SO_OVERFLOW:
 217       return vscreen->caps.caps.v1.bset.transform_feedback_overflow_query;
 218    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 219       return vscreen->caps.caps.v2.shader_buffer_offset_alignment;
 220    case PIPE_CAP_DOUBLES:
 221       return vscreen->caps.caps.v1.bset.has_fp64;
 222    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 223       return vscreen->caps.caps.v2.max_shader_patch_varyings;
 224    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 225       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TEXTURE_VIEW;
 226    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 227       return vscreen->caps.caps.v2.max_vertex_attrib_stride;
 228    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 229       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COPY_IMAGE;
 230    case PIPE_CAP_TGSI_TXQS:
 231       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TXQS;
 232    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 233       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FB_NO_ATTACH;
 234    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 235       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_ROBUST_BUFFER_ACCESS;
 236    case PIPE_CAP_TGSI_FS_FBFETCH:
 237       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TGSI_FBFETCH;
 238    case PIPE_CAP_TGSI_CLOCK:
 239       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_SHADER_CLOCK;
 240    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 241       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TGSI_COMPONENTS;
 242    case PIPE_CAP_TEXTURE_GATHER_SM5:
 243    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 244    case PIPE_CAP_FAKE_SW_MSAA:
 245    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 246    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 247    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 248    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 249    case PIPE_CAP_CLIP_HALFZ:
 250    case PIPE_CAP_VERTEXID_NOBASE:
 251    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 252    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 253    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 254    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 255    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 256    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 257    case PIPE_CAP_SHAREABLE_SHADERS:
 258    case PIPE_CAP_CLEAR_TEXTURE:
 259    case PIPE_CAP_DRAW_PARAMETERS:
 260    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 261    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 262    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 263    case PIPE_CAP_INVALIDATE_BUFFER:
 264    case PIPE_CAP_GENERATE_MIPMAP:
 265    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 266    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 267    case PIPE_CAP_STRING_MARKER:
 268    case PIPE_CAP_QUERY_MEMORY_INFO:
 269    case PIPE_CAP_PCI_GROUP:
 270    case PIPE_CAP_PCI_BUS:
 271    case PIPE_CAP_PCI_DEVICE:
 272    case PIPE_CAP_PCI_FUNCTION:
 273    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 274    case PIPE_CAP_TGSI_VOTE:
 275    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 276    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 277    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 278    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 279    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 280    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 281    case PIPE_CAP_INT64:
 282    case PIPE_CAP_INT64_DIVMOD:
 283    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 284    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 285    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 286    case PIPE_CAP_TGSI_BALLOT:
 287    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 288    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 289    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 290    case PIPE_CAP_POST_DEPTH_COVERAGE:
 291    case PIPE_CAP_BINDLESS_TEXTURE:
 292    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 293    case PIPE_CAP_MEMOBJ:
 294    case PIPE_CAP_LOAD_CONSTBUF:
 295    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 296    case PIPE_CAP_TILE_RASTER_ORDER:
 297    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 298    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 299    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 300    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 301    case PIPE_CAP_FENCE_SIGNAL:
 302    case PIPE_CAP_CONSTBUF0_FLAGS:
 303    case PIPE_CAP_PACKED_UNIFORMS:
 304    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 305    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 306    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 307    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 308    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 309    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 310    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 311       return 0;
 312    case PIPE_CAP_MAX_GS_INVOCATIONS:
 313       return 32;
 314    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 315       return 1 << 27;
 316    case PIPE_CAP_VENDOR_ID:
 317       return 0x1af4;
 318    case PIPE_CAP_DEVICE_ID:
 319       return 0x1010;
 320    case PIPE_CAP_ACCELERATED:
 321       return 1;
 322    case PIPE_CAP_UMA:
 323    case PIPE_CAP_VIDEO_MEMORY:
 324       return 0;
 325    case PIPE_CAP_NATIVE_FENCE_FD:
 326       return 0;
 327    }
 328    /* should only get here on unhandled cases */
 329    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 330    return 0;
 331 }
 332
 333 static int
 334 virgl_get_shader_param(struct pipe_screen *screen,
 335                        enum pipe_shader_type shader,
 336                        enum pipe_shader_cap param)
 337 {
 338    struct virgl_screen *vscreen = virgl_screen(screen);
 339
 340    if ((shader == PIPE_SHADER_TESS_CTRL || shader == PIPE_SHADER_TESS_EVAL) &&
 341        !vscreen->caps.caps.v1.bset.has_tessellation_shaders)
 342       return 0;
 343
 344    if (shader == PIPE_SHADER_COMPUTE &&
 345        !(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER))
 346      return 0;
 347
 348    switch(shader)
 349    {
 350    case PIPE_SHADER_FRAGMENT:
 351    case PIPE_SHADER_VERTEX:
 352    case PIPE_SHADER_GEOMETRY:
 353    case PIPE_SHADER_TESS_CTRL:
 354    case PIPE_SHADER_TESS_EVAL:
 355    case PIPE_SHADER_COMPUTE:
 356       switch (param) {
 357       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 358       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 359       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 360       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 361          return INT_MAX;
 362       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 363       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 364       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 365          return 1;
 366       case PIPE_SHADER_CAP_MAX_INPUTS:
 367          if (vscreen->caps.caps.v1.glsl_level < 150)
 368             return vscreen->caps.caps.v2.max_vertex_attribs;
 369          return (shader == PIPE_SHADER_VERTEX ||
 370                  shader == PIPE_SHADER_GEOMETRY) ? vscreen->caps.caps.v2.max_vertex_attribs : 32;
 371       case PIPE_SHADER_CAP_MAX_OUTPUTS:
 372          if (shader == PIPE_SHADER_FRAGMENT)
 373             return vscreen->caps.caps.v1.max_render_targets;
 374          return vscreen->caps.caps.v2.max_vertex_outputs;
 375      // case PIPE_SHADER_CAP_MAX_CONSTS:
 376      //    return 4096;
 377       case PIPE_SHADER_CAP_MAX_TEMPS:
 378          return 256;
 379       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 380          return vscreen->caps.caps.v1.max_uniform_blocks;
 381     //  case PIPE_SHADER_CAP_MAX_ADDRS:
 382      //    return 1;
 383       case PIPE_SHADER_CAP_SUBROUTINES:
 384          return 1;
 385       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 386             return 16;
 387       case PIPE_SHADER_CAP_INTEGERS:
 388          return vscreen->caps.caps.v1.glsl_level >= 130;
 389       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 390          return 32;
 391       case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 392          return 4096 * sizeof(float[4]);
 393       case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 394          if (shader == PIPE_SHADER_FRAGMENT || shader == PIPE_SHADER_COMPUTE)
 395             return vscreen->caps.caps.v2.max_shader_buffer_frag_compute;
 396          else
 397             return vscreen->caps.caps.v2.max_shader_buffer_other_stages;
 398       case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
 399          if (shader == PIPE_SHADER_FRAGMENT || shader == PIPE_SHADER_COMPUTE)
 400             return vscreen->caps.caps.v2.max_shader_image_frag_compute;
 401          else
 402             return vscreen->caps.caps.v2.max_shader_image_other_stages;
 403       case PIPE_SHADER_CAP_SUPPORTED_IRS:
 404          return (1 << PIPE_SHADER_IR_TGSI);
 405       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 406       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 407       case PIPE_SHADER_CAP_INT64_ATOMICS:
 408       case PIPE_SHADER_CAP_FP16:
 409       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 410       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 411          return 0;
 412       case PIPE_SHADER_CAP_SCALAR_ISA:
 413          return 1;
 414       default:
 415          return 0;
 416       }
 417    default:
 418       return 0;
 419    }
 420 }
 421
 422 static float
 423 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 424 {
 425    struct virgl_screen *vscreen = virgl_screen(screen);
 426    switch (param) {
 427    case PIPE_CAPF_MAX_LINE_WIDTH:
 428       return vscreen->caps.caps.v2.max_aliased_line_width;
 429    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 430       return vscreen->caps.caps.v2.max_smooth_line_width;
 431    case PIPE_CAPF_MAX_POINT_WIDTH:
 432       return vscreen->caps.caps.v2.max_aliased_point_size;
 433    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 434       return vscreen->caps.caps.v2.max_smooth_point_size;
 435    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 436       return 16.0;
 437    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 438       return vscreen->caps.caps.v2.max_texture_lod_bias;
 439    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 440    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 441    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 442       return 0.0f;
 443    }
 444    /* should only get here on unhandled cases */
 445    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 446    return 0.0;
 447 }
 448
 449 static int
 450 virgl_get_compute_param(struct pipe_screen *screen,
 451                         enum pipe_shader_ir ir_type,
 452                         enum pipe_compute_cap param,
 453                         void *ret)
 454 {
 455    struct virgl_screen *vscreen = virgl_screen(screen);
 456    if (!(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER))
 457       return 0;
 458    switch (param) {
 459    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 460       if (ret) {
 461          uint64_t *grid_size = ret;
 462          grid_size[0] = vscreen->caps.caps.v2.max_compute_grid_size[0];
 463          grid_size[1] = vscreen->caps.caps.v2.max_compute_grid_size[1];
 464          grid_size[2] = vscreen->caps.caps.v2.max_compute_grid_size[2];
 465       }
 466       return 3 * sizeof(uint64_t) ;
 467    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 468       if (ret) {
 469          uint64_t *block_size = ret;
 470          block_size[0] = vscreen->caps.caps.v2.max_compute_block_size[0];
 471          block_size[1] = vscreen->caps.caps.v2.max_compute_block_size[1];
 472          block_size[2] = vscreen->caps.caps.v2.max_compute_block_size[2];
 473       }
 474       return 3 * sizeof(uint64_t);
 475    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 476       if (ret) {
 477          uint64_t *max_threads_per_block = ret;
 478          *max_threads_per_block = vscreen->caps.caps.v2.max_compute_work_group_invocations;
 479       }
 480       return sizeof(uint64_t);
 481    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 482       if (ret) {
 483          uint64_t *max_local_size = ret;
 484          /* Value reported by the closed source driver. */
 485          *max_local_size = vscreen->caps.caps.v2.max_compute_shared_memory_size;
 486       }
 487       return sizeof(uint64_t);
 488    default:
 489       break;
 490    }
 491    return 0;
 492 }
 493
 494 static boolean
 495 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 496                                  enum pipe_format format)
 497 {
 498    struct virgl_screen *vscreen = virgl_screen(screen);
 499    const struct util_format_description *format_desc;
 500    int i;
 501
 502    format_desc = util_format_description(format);
 503    if (!format_desc)
 504       return FALSE;
 505
 506    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 507       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 508       int big = vformat / 32;
 509       int small = vformat % 32;
 510       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 511          return FALSE;
 512       return TRUE;
 513    }
 514
 515    /* Find the first non-VOID channel. */
 516    for (i = 0; i < 4; i++) {
 517       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 518          break;
 519       }
 520    }
 521
 522    if (i == 4)
 523       return FALSE;
 524
 525    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 526       return FALSE;
 527
 528    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 529       return FALSE;
 530    return TRUE;
 531 }
 532
 533 /**
 534  * Query format support for creating a texture, drawing surface, etc.
 535  * \param format  the format to test
 536  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 537  */
 538 static boolean
 539 virgl_is_format_supported( struct pipe_screen *screen,
 540                                  enum pipe_format format,
 541                                  enum pipe_texture_target target,
 542                                  unsigned sample_count,
 543                                  unsigned storage_sample_count,
 544                                  unsigned bind)
 545 {
 546    struct virgl_screen *vscreen = virgl_screen(screen);
 547    const struct util_format_description *format_desc;
 548    int i;
 549
 550    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 551       return false;
 552
 553    assert(target == PIPE_BUFFER ||
 554           target == PIPE_TEXTURE_1D ||
 555           target == PIPE_TEXTURE_1D_ARRAY ||
 556           target == PIPE_TEXTURE_2D ||
 557           target == PIPE_TEXTURE_2D_ARRAY ||
 558           target == PIPE_TEXTURE_RECT ||
 559           target == PIPE_TEXTURE_3D ||
 560           target == PIPE_TEXTURE_CUBE ||
 561           target == PIPE_TEXTURE_CUBE_ARRAY);
 562
 563    format_desc = util_format_description(format);
 564    if (!format_desc)
 565       return FALSE;
 566
 567    if (util_format_is_intensity(format))
 568       return FALSE;
 569
 570    if (sample_count > 1) {
 571       if (!vscreen->caps.caps.v1.bset.texture_multisample)
 572          return FALSE;
 573
 574       if (bind & PIPE_BIND_SHADER_IMAGE) {
 575          if (sample_count > vscreen->caps.caps.v2.max_image_samples)
 576             return FALSE;
 577       }
 578
 579       if (sample_count > vscreen->caps.caps.v1.max_samples)
 580          return FALSE;
 581    }
 582
 583    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 584       return virgl_is_vertex_format_supported(screen, format);
 585    }
 586
 587    /* Allow 3-comp 32 bit textures only for TBOs (needed for ARB_tbo_rgb32) */
 588    if ((format == PIPE_FORMAT_R32G32B32_FLOAT ||
 589        format == PIPE_FORMAT_R32G32B32_SINT ||
 590        format == PIPE_FORMAT_R32G32B32_UINT) &&
 591        target != PIPE_BUFFER)
 592       return FALSE;
 593
 594    if (bind & PIPE_BIND_RENDER_TARGET) {
 595       /* For ARB_framebuffer_no_attachments. */
 596       if (format == PIPE_FORMAT_NONE)
 597          return TRUE;
 598
 599       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 600          return FALSE;
 601
 602       /*
 603        * Although possible, it is unnatural to render into compressed or YUV
 604        * surfaces. So disable these here to avoid going into weird paths
 605        * inside the state trackers.
 606        */
 607       if (format_desc->block.width != 1 ||
 608           format_desc->block.height != 1)
 609          return FALSE;
 610
 611       {
 612          int big = format / 32;
 613          int small = format % 32;
 614          if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
 615             return FALSE;
 616       }
 617    }
 618
 619    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 620       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 621          return FALSE;
 622    }
 623
 624    /*
 625     * All other operations (sampling, transfer, etc).
 626     */
 627
 628    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 629       goto out_lookup;
 630    }
 631    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 632       goto out_lookup;
 633    }
 634    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 635       goto out_lookup;
 636    }
 637
 638    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 639       goto out_lookup;
 640    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 641       goto out_lookup;
 642    }
 643
 644    /* Find the first non-VOID channel. */
 645    for (i = 0; i < 4; i++) {
 646       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 647          break;
 648       }
 649    }
 650
 651    if (i == 4)
 652       return FALSE;
 653
 654    /* no L4A4 */
 655    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 656       return FALSE;
 657
 658  out_lookup:
 659    {
 660       int big = format / 32;
 661       int small = format % 32;
 662       if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
 663          return FALSE;
 664    }
 665    /*
 666     * Everything else should be supported by u_format.
 667     */
 668    return TRUE;
 669 }
 670
 671 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 672                                       struct pipe_resource *res,
 673                                       unsigned level, unsigned layer,
 674                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 675 {
 676    struct virgl_screen *vscreen = virgl_screen(screen);
 677    struct virgl_winsys *vws = vscreen->vws;
 678    struct virgl_resource *vres = virgl_resource(res);
 679
 680    if (vws->flush_frontbuffer)
 681       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 682                              sub_box);
 683 }
 684
 685 static void virgl_fence_reference(struct pipe_screen *screen,
 686                                   struct pipe_fence_handle **ptr,
 687                                   struct pipe_fence_handle *fence)
 688 {
 689    struct virgl_screen *vscreen = virgl_screen(screen);
 690    struct virgl_winsys *vws = vscreen->vws;
 691
 692    vws->fence_reference(vws, ptr, fence);
 693 }
 694
 695 static boolean virgl_fence_finish(struct pipe_screen *screen,
 696                                   struct pipe_context *ctx,
 697                                   struct pipe_fence_handle *fence,
 698                                   uint64_t timeout)
 699 {
 700    struct virgl_screen *vscreen = virgl_screen(screen);
 701    struct virgl_winsys *vws = vscreen->vws;
 702
 703    return vws->fence_wait(vws, fence, timeout);
 704 }
 705
 706 static uint64_t
 707 virgl_get_timestamp(struct pipe_screen *_screen)
 708 {
 709    return os_time_get_nano();
 710 }
 711
 712 static void
 713 virgl_destroy_screen(struct pipe_screen *screen)
 714 {
 715    struct virgl_screen *vscreen = virgl_screen(screen);
 716    struct virgl_winsys *vws = vscreen->vws;
 717
 718    slab_destroy_parent(&vscreen->texture_transfer_pool);
 719
 720    if (vws)
 721       vws->destroy(vws);
 722    FREE(vscreen);
 723 }
 724
 725 struct pipe_screen *
 726 virgl_create_screen(struct virgl_winsys *vws)
 727 {
 728    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 729
 730    if (!screen)
 731       return NULL;
 732
 733    screen->vws = vws;
 734    screen->base.get_name = virgl_get_name;
 735    screen->base.get_vendor = virgl_get_vendor;
 736    screen->base.get_param = virgl_get_param;
 737    screen->base.get_shader_param = virgl_get_shader_param;
 738    screen->base.get_compute_param = virgl_get_compute_param;
 739    screen->base.get_paramf = virgl_get_paramf;
 740    screen->base.is_format_supported = virgl_is_format_supported;
 741    screen->base.destroy = virgl_destroy_screen;
 742    screen->base.context_create = virgl_context_create;
 743    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 744    screen->base.get_timestamp = virgl_get_timestamp;
 745    screen->base.fence_reference = virgl_fence_reference;
 746    //screen->base.fence_signalled = virgl_fence_signalled;
 747    screen->base.fence_finish = virgl_fence_finish;
 748
 749    virgl_init_screen_resource_functions(&screen->base);
 750
 751    vws->get_caps(vws, &screen->caps);
 752
 753    screen->refcnt = 1;
 754
 755    slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
 756
 757    return &screen->base;
 758 }