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/format/u_format.h"
  25 #include "util/format/u_format_s3tc.h"
  26 #include "util/u_screen.h"
  27 #include "util/u_video.h"
  28 #include "util/u_math.h"
  29 #include "util/os_time.h"
  30 #include "util/xmlconfig.h"
  31 #include "pipe/p_defines.h"
  32 #include "pipe/p_screen.h"
  33
  34 #include "tgsi/tgsi_exec.h"
  35
  36 #include "virgl_screen.h"
  37 #include "virgl_resource.h"
  38 #include "virgl_public.h"
  39 #include "virgl_context.h"
  40 #include "virgl_protocol.h"
  41
  42 int virgl_debug = 0;
  43 static const struct debug_named_value debug_options[] = {
  44    { "verbose",   VIRGL_DEBUG_VERBOSE,             NULL },
  45    { "tgsi",      VIRGL_DEBUG_TGSI,                NULL },
  46    { "emubgra",   VIRGL_DEBUG_EMULATE_BGRA,        "Enable tweak to emulate BGRA as RGBA on GLES hosts"},
  47    { "bgraswz",   VIRGL_DEBUG_BGRA_DEST_SWIZZLE,   "Enable tweak to swizzle emulated BGRA on GLES hosts" },
  48    { "sync",      VIRGL_DEBUG_SYNC,                "Sync after every flush" },
  49    { "xfer",      VIRGL_DEBUG_XFER,                "Do not optimize for transfers" },
  50    DEBUG_NAMED_VALUE_END
  51 };
  52 DEBUG_GET_ONCE_FLAGS_OPTION(virgl_debug, "VIRGL_DEBUG", debug_options, 0)
  53
  54 static const char *
  55 virgl_get_vendor(struct pipe_screen *screen)
  56 {
  57    return "Mesa/X.org";
  58 }
  59
  60
  61 static const char *
  62 virgl_get_name(struct pipe_screen *screen)
  63 {
  64    return "virgl";
  65 }
  66
  67 static int
  68 virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
  69 {
  70    struct virgl_screen *vscreen = virgl_screen(screen);
  71    switch (param) {
  72    case PIPE_CAP_NPOT_TEXTURES:
  73       return 1;
  74    case PIPE_CAP_FRAGMENT_SHADER_TEXTURE_LOD:
  75    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
  76    case PIPE_CAP_VERTEX_SHADER_SATURATE:
  77       return 1;
  78    case PIPE_CAP_ANISOTROPIC_FILTER:
  79       return 1;
  80    case PIPE_CAP_POINT_SPRITE:
  81       return 1;
  82    case PIPE_CAP_MAX_RENDER_TARGETS:
  83       return vscreen->caps.caps.v1.max_render_targets;
  84    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  85       return vscreen->caps.caps.v1.max_dual_source_render_targets;
  86    case PIPE_CAP_OCCLUSION_QUERY:
  87       return vscreen->caps.caps.v1.bset.occlusion_query;
  88    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  89    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  90       return vscreen->caps.caps.v1.bset.mirror_clamp;
  91    case PIPE_CAP_TEXTURE_SWIZZLE:
  92       return 1;
  93    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
  94       if (vscreen->caps.caps.v2.max_texture_2d_size)
  95          return vscreen->caps.caps.v2.max_texture_2d_size;
  96       return 16384;
  97    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  98       if (vscreen->caps.caps.v2.max_texture_3d_size)
  99          return 1 + util_logbase2(vscreen->caps.caps.v2.max_texture_3d_size);
 100       return 9; /* 256 x 256 x 256 */
 101    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 102       if (vscreen->caps.caps.v2.max_texture_cube_size)
 103          return 1 + util_logbase2(vscreen->caps.caps.v2.max_texture_cube_size);
 104       return 13; /* 4K x 4K */
 105    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 106       return 1;
 107    case PIPE_CAP_INDEP_BLEND_ENABLE:
 108       return vscreen->caps.caps.v1.bset.indep_blend_enable;
 109    case PIPE_CAP_INDEP_BLEND_FUNC:
 110       return vscreen->caps.caps.v1.bset.indep_blend_func;
 111    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 112    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 113    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 114       return 1;
 115    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 116       return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
 117    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 118       if (vscreen->caps.caps.v1.bset.depth_clip_disable)
 119          return 1;
 120       if (vscreen->caps.caps.v2.host_feature_check_version >= 3)
 121          return 2;
 122       return 0;
 123    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 124       return vscreen->caps.caps.v1.max_streamout_buffers;
 125    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 126    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 127       return 16*4;
 128    case PIPE_CAP_PRIMITIVE_RESTART:
 129    case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
 130       return vscreen->caps.caps.v1.bset.primitive_restart;
 131    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 132       return vscreen->caps.caps.v1.bset.shader_stencil_export;
 133    case PIPE_CAP_TGSI_INSTANCEID:
 134    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 135       return 1;
 136    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 137       return vscreen->caps.caps.v1.bset.seamless_cube_map;
 138    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 139       return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
 140    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 141       return vscreen->caps.caps.v1.max_texture_array_layers;
 142    case PIPE_CAP_MIN_TEXEL_OFFSET:
 143       return vscreen->caps.caps.v2.min_texel_offset;
 144    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 145       return vscreen->caps.caps.v2.min_texture_gather_offset;
 146    case PIPE_CAP_MAX_TEXEL_OFFSET:
 147       return vscreen->caps.caps.v2.max_texel_offset;
 148    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 149       return vscreen->caps.caps.v2.max_texture_gather_offset;
 150    case PIPE_CAP_CONDITIONAL_RENDER:
 151       return vscreen->caps.caps.v1.bset.conditional_render;
 152    case PIPE_CAP_TEXTURE_BARRIER:
 153       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TEXTURE_BARRIER;
 154    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 155       return 1;
 156    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 157    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 158       return vscreen->caps.caps.v1.bset.color_clamping;
 159    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 160       return (vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FBO_MIXED_COLOR_FORMATS) ||
 161             (vscreen->caps.caps.v2.host_feature_check_version < 1);
 162    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 163       return vscreen->caps.caps.v1.glsl_level;
 164    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 165       return MIN2(vscreen->caps.caps.v1.glsl_level, 140);
 166    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 167    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 168       return 0;
 169    case PIPE_CAP_COMPUTE:
 170       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER;
 171    case PIPE_CAP_USER_VERTEX_BUFFERS:
 172       return 0;
 173    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 174       return vscreen->caps.caps.v2.uniform_buffer_offset_alignment;
 175    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 176    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 177       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
 178    case PIPE_CAP_START_INSTANCE:
 179       return vscreen->caps.caps.v1.bset.start_instance;
 180    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 181    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 182    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 183    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 184    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 185       return 0;
 186    case PIPE_CAP_QUERY_TIMESTAMP:
 187       return 1;
 188    case PIPE_CAP_QUERY_TIME_ELAPSED:
 189       return 1;
 190    case PIPE_CAP_TGSI_TEXCOORD:
 191       return 0;
 192    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 193       return VIRGL_MAP_BUFFER_ALIGNMENT;
 194    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 195       return vscreen->caps.caps.v1.max_tbo_size > 0;
 196    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 197       return vscreen->caps.caps.v2.texture_buffer_offset_alignment;
 198    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 199       return 0;
 200    case PIPE_CAP_CUBE_MAP_ARRAY:
 201       return vscreen->caps.caps.v1.bset.cube_map_array;
 202    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 203       return vscreen->caps.caps.v1.bset.texture_multisample;
 204    case PIPE_CAP_MAX_VIEWPORTS:
 205       return vscreen->caps.caps.v1.max_viewports;
 206    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 207       return vscreen->caps.caps.v1.max_tbo_size;
 208    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 209    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 210    case PIPE_CAP_ENDIANNESS:
 211       return 0;
 212    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 213    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 214       return 1;
 215    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 216       return 0;
 217    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 218       return vscreen->caps.caps.v2.max_geom_output_vertices;
 219    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 220       return vscreen->caps.caps.v2.max_geom_total_output_components;
 221    case PIPE_CAP_TEXTURE_QUERY_LOD:
 222       return vscreen->caps.caps.v1.bset.texture_query_lod;
 223    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 224       return vscreen->caps.caps.v1.max_texture_gather_components;
 225    case PIPE_CAP_DRAW_INDIRECT:
 226       return vscreen->caps.caps.v1.bset.has_indirect_draw;
 227    case PIPE_CAP_SAMPLE_SHADING:
 228    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 229       return vscreen->caps.caps.v1.bset.has_sample_shading;
 230    case PIPE_CAP_CULL_DISTANCE:
 231       return vscreen->caps.caps.v1.bset.has_cull;
 232    case PIPE_CAP_MAX_VERTEX_STREAMS:
 233       return ((vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TRANSFORM_FEEDBACK3) ||
 234               (vscreen->caps.caps.v2.host_feature_check_version < 2)) ? 4 : 1;
 235    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 236       return vscreen->caps.caps.v1.bset.conditional_render_inverted;
 237    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 238       return vscreen->caps.caps.v1.bset.derivative_control;
 239    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 240       return vscreen->caps.caps.v1.bset.polygon_offset_clamp;
 241    case PIPE_CAP_QUERY_SO_OVERFLOW:
 242       return vscreen->caps.caps.v1.bset.transform_feedback_overflow_query;
 243    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 244       return vscreen->caps.caps.v2.shader_buffer_offset_alignment;
 245    case PIPE_CAP_DOUBLES:
 246       return vscreen->caps.caps.v1.bset.has_fp64 ||
 247             (vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FAKE_FP64);
 248    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 249       return vscreen->caps.caps.v2.max_shader_patch_varyings;
 250    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 251       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TEXTURE_VIEW;
 252    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 253       return vscreen->caps.caps.v2.max_vertex_attrib_stride;
 254    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 255       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COPY_IMAGE;
 256    case PIPE_CAP_TGSI_TXQS:
 257       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TXQS;
 258    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 259       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FB_NO_ATTACH;
 260    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 261       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_ROBUST_BUFFER_ACCESS;
 262    case PIPE_CAP_FBFETCH:
 263       return (vscreen->caps.caps.v2.capability_bits &
 264               VIRGL_CAP_TGSI_FBFETCH) ? 1 : 0;
 265    case PIPE_CAP_BLEND_EQUATION_ADVANCED:
 266       return vscreen->caps.caps.v2.capability_bits_v2 & VIRGL_CAP_V2_BLEND_EQUATION;
 267    case PIPE_CAP_TGSI_CLOCK:
 268       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_SHADER_CLOCK;
 269    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 270       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TGSI_COMPONENTS;
 271    case PIPE_CAP_MAX_COMBINED_SHADER_BUFFERS:
 272       return vscreen->caps.caps.v2.max_combined_shader_buffers;
 273    case PIPE_CAP_MAX_COMBINED_HW_ATOMIC_COUNTERS:
 274       return vscreen->caps.caps.v2.max_combined_atomic_counters;
 275    case PIPE_CAP_MAX_COMBINED_HW_ATOMIC_COUNTER_BUFFERS:
 276       return vscreen->caps.caps.v2.max_combined_atomic_counter_buffers;
 277    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 278    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 279       return 1; /* TODO: need to introduce a hw-cap for this */
 280    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 281       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_QBO;
 282    case PIPE_CAP_MAX_VARYINGS:
 283       if (vscreen->caps.caps.v1.glsl_level < 150)
 284          return vscreen->caps.caps.v2.max_vertex_attribs;
 285       return 32;
 286    case PIPE_CAP_FAKE_SW_MSAA:
 287       /* If the host supports only one sample (e.g., if it is using softpipe),
 288        * fake multisampling to able to advertise higher GL versions. */
 289       return (vscreen->caps.caps.v1.max_samples == 1) ? 1 : 0;
 290    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 291       return !!(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_MULTI_DRAW_INDIRECT);
 292    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 293       return !!(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_INDIRECT_PARAMS);
 294    case PIPE_CAP_PCI_GROUP:
 295    case PIPE_CAP_PCI_BUS:
 296    case PIPE_CAP_PCI_DEVICE:
 297    case PIPE_CAP_PCI_FUNCTION:
 298    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 299    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 300       return 0;
 301    case PIPE_CAP_CLEAR_TEXTURE:
 302       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_CLEAR_TEXTURE;
 303    case PIPE_CAP_CLIP_HALFZ:
 304       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_CLIP_HALFZ;
 305    case PIPE_CAP_MAX_GS_INVOCATIONS:
 306       return 32;
 307    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 308       return 1 << 27;
 309    case PIPE_CAP_VENDOR_ID:
 310       return 0x1af4;
 311    case PIPE_CAP_DEVICE_ID:
 312       return 0x1010;
 313    case PIPE_CAP_ACCELERATED:
 314       return 1;
 315    case PIPE_CAP_UMA:
 316    case PIPE_CAP_VIDEO_MEMORY:
 317       return 0;
 318    case PIPE_CAP_NATIVE_FENCE_FD:
 319       return vscreen->vws->supports_fences;
 320    case PIPE_CAP_DEST_SURFACE_SRGB_CONTROL:
 321       return (vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_SRGB_WRITE_CONTROL) ||
 322             (vscreen->caps.caps.v2.host_feature_check_version < 1);
 323    case PIPE_CAP_TGSI_SKIP_SHRINK_IO_ARRAYS:
 324       return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_INDIRECT_INPUT_ADDR;
 325    default:
 326       return u_pipe_screen_get_param_defaults(screen, param);
 327    }
 328 }
 329
 330 static int
 331 virgl_get_shader_param(struct pipe_screen *screen,
 332                        enum pipe_shader_type shader,
 333                        enum pipe_shader_cap param)
 334 {
 335    struct virgl_screen *vscreen = virgl_screen(screen);
 336
 337    if ((shader == PIPE_SHADER_TESS_CTRL || shader == PIPE_SHADER_TESS_EVAL) &&
 338        !vscreen->caps.caps.v1.bset.has_tessellation_shaders)
 339       return 0;
 340
 341    if (shader == PIPE_SHADER_COMPUTE &&
 342        !(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER))
 343      return 0;
 344
 345    switch(shader)
 346    {
 347    case PIPE_SHADER_FRAGMENT:
 348    case PIPE_SHADER_VERTEX:
 349    case PIPE_SHADER_GEOMETRY:
 350    case PIPE_SHADER_TESS_CTRL:
 351    case PIPE_SHADER_TESS_EVAL:
 352    case PIPE_SHADER_COMPUTE:
 353       switch (param) {
 354       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 355       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 356       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 357       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 358          return INT_MAX;
 359       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 360       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 361       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 362          return 1;
 363       case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 364       case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 365          return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_INDIRECT_INPUT_ADDR;
 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_MAX_HW_ATOMIC_COUNTERS:
 406          return vscreen->caps.caps.v2.max_atomic_counters[shader];
 407       case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 408          return vscreen->caps.caps.v2.max_atomic_counter_buffers[shader];
 409       case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 410       case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 411       case PIPE_SHADER_CAP_INT64_ATOMICS:
 412       case PIPE_SHADER_CAP_FP16:
 413       case PIPE_SHADER_CAP_FP16_DERIVATIVES:
 414       case PIPE_SHADER_CAP_INT16:
 415       case PIPE_SHADER_CAP_GLSL_16BIT_CONSTS:
 416          return 0;
 417       default:
 418          return 0;
 419       }
 420    default:
 421       return 0;
 422    }
 423 }
 424
 425 static float
 426 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 427 {
 428    struct virgl_screen *vscreen = virgl_screen(screen);
 429    switch (param) {
 430    case PIPE_CAPF_MAX_LINE_WIDTH:
 431       return vscreen->caps.caps.v2.max_aliased_line_width;
 432    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 433       return vscreen->caps.caps.v2.max_smooth_line_width;
 434    case PIPE_CAPF_MAX_POINT_WIDTH:
 435       return vscreen->caps.caps.v2.max_aliased_point_size;
 436    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 437       return vscreen->caps.caps.v2.max_smooth_point_size;
 438    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 439       return 16.0;
 440    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 441       return vscreen->caps.caps.v2.max_texture_lod_bias;
 442    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 443    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 444    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 445       return 0.0f;
 446    }
 447    /* should only get here on unhandled cases */
 448    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 449    return 0.0;
 450 }
 451
 452 static int
 453 virgl_get_compute_param(struct pipe_screen *screen,
 454                         enum pipe_shader_ir ir_type,
 455                         enum pipe_compute_cap param,
 456                         void *ret)
 457 {
 458    struct virgl_screen *vscreen = virgl_screen(screen);
 459    if (!(vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_COMPUTE_SHADER))
 460       return 0;
 461    switch (param) {
 462    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 463       if (ret) {
 464          uint64_t *grid_size = ret;
 465          grid_size[0] = vscreen->caps.caps.v2.max_compute_grid_size[0];
 466          grid_size[1] = vscreen->caps.caps.v2.max_compute_grid_size[1];
 467          grid_size[2] = vscreen->caps.caps.v2.max_compute_grid_size[2];
 468       }
 469       return 3 * sizeof(uint64_t) ;
 470    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 471       if (ret) {
 472          uint64_t *block_size = ret;
 473          block_size[0] = vscreen->caps.caps.v2.max_compute_block_size[0];
 474          block_size[1] = vscreen->caps.caps.v2.max_compute_block_size[1];
 475          block_size[2] = vscreen->caps.caps.v2.max_compute_block_size[2];
 476       }
 477       return 3 * sizeof(uint64_t);
 478    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 479       if (ret) {
 480          uint64_t *max_threads_per_block = ret;
 481          *max_threads_per_block = vscreen->caps.caps.v2.max_compute_work_group_invocations;
 482       }
 483       return sizeof(uint64_t);
 484    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 485       if (ret) {
 486          uint64_t *max_local_size = ret;
 487          /* Value reported by the closed source driver. */
 488          *max_local_size = vscreen->caps.caps.v2.max_compute_shared_memory_size;
 489       }
 490       return sizeof(uint64_t);
 491    default:
 492       break;
 493    }
 494    return 0;
 495 }
 496
 497 static bool
 498 has_format_bit(struct virgl_supported_format_mask *mask,
 499                enum virgl_formats fmt)
 500 {
 501    assert(fmt < VIRGL_FORMAT_MAX);
 502    unsigned val = (unsigned)fmt;
 503    unsigned idx = val / 32;
 504    unsigned bit = val % 32;
 505    assert(idx < ARRAY_SIZE(mask->bitmask));
 506    return (mask->bitmask[idx] & (1u << bit)) != 0;
 507 }
 508
 509 bool
 510 virgl_has_readback_format(struct pipe_screen *screen,
 511                           enum virgl_formats fmt)
 512 {
 513    struct virgl_screen *vscreen = virgl_screen(screen);
 514    return has_format_bit(&vscreen->caps.caps.v2.supported_readback_formats,
 515                          fmt);
 516 }
 517
 518 static bool
 519 virgl_is_vertex_format_supported(struct pipe_screen *screen,
 520                                  enum pipe_format format)
 521 {
 522    struct virgl_screen *vscreen = virgl_screen(screen);
 523    const struct util_format_description *format_desc;
 524    int i;
 525
 526    format_desc = util_format_description(format);
 527    if (!format_desc)
 528       return false;
 529
 530    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 531       int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
 532       int big = vformat / 32;
 533       int small = vformat % 32;
 534       if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
 535          return false;
 536       return true;
 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    if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 550       return false;
 551
 552    if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
 553       return false;
 554    return true;
 555 }
 556
 557 static bool
 558 virgl_format_check_bitmask(enum pipe_format format,
 559                            uint32_t bitmask[16],
 560                            bool may_emulate_bgra)
 561 {
 562    enum virgl_formats vformat = pipe_to_virgl_format(format);
 563    int big = vformat / 32;
 564    int small = vformat % 32;
 565    if ((bitmask[big] & (1 << small)))
 566       return true;
 567
 568    /* On GLES hosts we don't advertise BGRx_SRGB, but we may be able
 569     * emulate it by using a swizzled RGBx */
 570    if (may_emulate_bgra) {
 571       if (format == PIPE_FORMAT_B8G8R8A8_SRGB)
 572          format = PIPE_FORMAT_R8G8B8A8_SRGB;
 573       else if (format == PIPE_FORMAT_B8G8R8X8_SRGB)
 574          format = PIPE_FORMAT_R8G8B8X8_SRGB;
 575       else {
 576          return false;
 577       }
 578
 579       vformat = pipe_to_virgl_format(format);
 580       big = vformat / 32;
 581       small = vformat % 32;
 582       if (bitmask[big] & (1 << small))
 583          return true;
 584    }
 585    return false;
 586 }
 587
 588 /**
 589  * Query format support for creating a texture, drawing surface, etc.
 590  * \param format  the format to test
 591  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 592  */
 593 static bool
 594 virgl_is_format_supported( struct pipe_screen *screen,
 595                                  enum pipe_format format,
 596                                  enum pipe_texture_target target,
 597                                  unsigned sample_count,
 598                                  unsigned storage_sample_count,
 599                                  unsigned bind)
 600 {
 601    struct virgl_screen *vscreen = virgl_screen(screen);
 602    const struct util_format_description *format_desc;
 603    int i;
 604
 605    union virgl_caps *caps = &vscreen->caps.caps;
 606    boolean may_emulate_bgra = (caps->v2.capability_bits &
 607                                VIRGL_CAP_APP_TWEAK_SUPPORT) &&
 608                                vscreen->tweak_gles_emulate_bgra;
 609
 610    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 611       return false;
 612
 613    if (!util_is_power_of_two_or_zero(sample_count))
 614       return false;
 615
 616    assert(target == PIPE_BUFFER ||
 617           target == PIPE_TEXTURE_1D ||
 618           target == PIPE_TEXTURE_1D_ARRAY ||
 619           target == PIPE_TEXTURE_2D ||
 620           target == PIPE_TEXTURE_2D_ARRAY ||
 621           target == PIPE_TEXTURE_RECT ||
 622           target == PIPE_TEXTURE_3D ||
 623           target == PIPE_TEXTURE_CUBE ||
 624           target == PIPE_TEXTURE_CUBE_ARRAY);
 625
 626    format_desc = util_format_description(format);
 627    if (!format_desc)
 628       return false;
 629
 630    if (util_format_is_intensity(format))
 631       return false;
 632
 633    if (sample_count > 1) {
 634       if (!caps->v1.bset.texture_multisample)
 635          return false;
 636
 637       if (bind & PIPE_BIND_SHADER_IMAGE) {
 638          if (sample_count > caps->v2.max_image_samples)
 639             return false;
 640       }
 641
 642       if (sample_count > caps->v1.max_samples)
 643          return false;
 644    }
 645
 646    if (bind & PIPE_BIND_VERTEX_BUFFER) {
 647       return virgl_is_vertex_format_supported(screen, format);
 648    }
 649
 650    if (util_format_is_compressed(format) && target == PIPE_BUFFER)
 651       return false;
 652
 653    /* Allow 3-comp 32 bit textures only for TBOs (needed for ARB_tbo_rgb32) */
 654    if ((format == PIPE_FORMAT_R32G32B32_FLOAT ||
 655        format == PIPE_FORMAT_R32G32B32_SINT ||
 656        format == PIPE_FORMAT_R32G32B32_UINT) &&
 657        target != PIPE_BUFFER)
 658       return false;
 659
 660    if ((format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC ||
 661         format_desc->layout == UTIL_FORMAT_LAYOUT_ETC ||
 662         format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) &&
 663        target == PIPE_TEXTURE_3D)
 664       return false;
 665
 666
 667    if (bind & PIPE_BIND_RENDER_TARGET) {
 668       /* For ARB_framebuffer_no_attachments. */
 669       if (format == PIPE_FORMAT_NONE)
 670          return TRUE;
 671
 672       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 673          return false;
 674
 675       /*
 676        * Although possible, it is unnatural to render into compressed or YUV
 677        * surfaces. So disable these here to avoid going into weird paths
 678        * inside gallium frontends.
 679        */
 680       if (format_desc->block.width != 1 ||
 681           format_desc->block.height != 1)
 682          return false;
 683
 684       if (!virgl_format_check_bitmask(format,
 685                                       caps->v1.render.bitmask,
 686                                       may_emulate_bgra))
 687          return false;
 688    }
 689
 690    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 691       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 692          return false;
 693    }
 694
 695    if (bind & PIPE_BIND_SCANOUT) {
 696       if (!virgl_format_check_bitmask(format, caps->v2.scanout.bitmask, false))
 697          return false;
 698    }
 699
 700    /*
 701     * All other operations (sampling, transfer, etc).
 702     */
 703
 704    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 705       goto out_lookup;
 706    }
 707    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 708       goto out_lookup;
 709    }
 710    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
 711       goto out_lookup;
 712    }
 713    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC) {
 714       goto out_lookup;
 715    }
 716
 717    if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
 718       goto out_lookup;
 719    } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
 720       goto out_lookup;
 721    }
 722
 723    /* Find the first non-VOID channel. */
 724    for (i = 0; i < 4; i++) {
 725       if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 726          break;
 727       }
 728    }
 729
 730    if (i == 4)
 731       return false;
 732
 733    /* no L4A4 */
 734    if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
 735       return false;
 736
 737  out_lookup:
 738    return virgl_format_check_bitmask(format,
 739                                      caps->v1.sampler.bitmask,
 740                                      may_emulate_bgra);
 741 }
 742
 743 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
 744                                       struct pipe_resource *res,
 745                                       unsigned level, unsigned layer,
 746                                     void *winsys_drawable_handle, struct pipe_box *sub_box)
 747 {
 748    struct virgl_screen *vscreen = virgl_screen(screen);
 749    struct virgl_winsys *vws = vscreen->vws;
 750    struct virgl_resource *vres = virgl_resource(res);
 751
 752    if (vws->flush_frontbuffer)
 753       vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
 754                              sub_box);
 755 }
 756
 757 static void virgl_fence_reference(struct pipe_screen *screen,
 758                                   struct pipe_fence_handle **ptr,
 759                                   struct pipe_fence_handle *fence)
 760 {
 761    struct virgl_screen *vscreen = virgl_screen(screen);
 762    struct virgl_winsys *vws = vscreen->vws;
 763
 764    vws->fence_reference(vws, ptr, fence);
 765 }
 766
 767 static bool virgl_fence_finish(struct pipe_screen *screen,
 768                                struct pipe_context *ctx,
 769                                struct pipe_fence_handle *fence,
 770                                uint64_t timeout)
 771 {
 772    struct virgl_screen *vscreen = virgl_screen(screen);
 773    struct virgl_winsys *vws = vscreen->vws;
 774
 775    return vws->fence_wait(vws, fence, timeout);
 776 }
 777
 778 static int virgl_fence_get_fd(struct pipe_screen *screen,
 779             struct pipe_fence_handle *fence)
 780 {
 781    struct virgl_screen *vscreen = virgl_screen(screen);
 782    struct virgl_winsys *vws = vscreen->vws;
 783
 784    return vws->fence_get_fd(vws, fence);
 785 }
 786
 787 static uint64_t
 788 virgl_get_timestamp(struct pipe_screen *_screen)
 789 {
 790    return os_time_get_nano();
 791 }
 792
 793 static void
 794 virgl_destroy_screen(struct pipe_screen *screen)
 795 {
 796    struct virgl_screen *vscreen = virgl_screen(screen);
 797    struct virgl_winsys *vws = vscreen->vws;
 798
 799    slab_destroy_parent(&vscreen->transfer_pool);
 800
 801    if (vws)
 802       vws->destroy(vws);
 803    FREE(vscreen);
 804 }
 805
 806 static void
 807 fixup_formats(union virgl_caps *caps, struct virgl_supported_format_mask *mask)
 808 {
 809    const size_t size = ARRAY_SIZE(mask->bitmask);
 810    for (int i = 0; i < size; ++i) {
 811       if (mask->bitmask[i] != 0)
 812          return; /* we got some formats, we definately have a new protocol */
 813    }
 814
 815    /* old protocol used; fall back to considering all sampleable formats valid
 816     * readback-formats
 817     */
 818    for (int i = 0; i < size; ++i)
 819       mask->bitmask[i] = caps->v1.sampler.bitmask[i];
 820 }
 821
 822 struct pipe_screen *
 823 virgl_create_screen(struct virgl_winsys *vws, const struct pipe_screen_config *config)
 824 {
 825    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 826
 827    const char *VIRGL_GLES_EMULATE_BGRA = "gles_emulate_bgra";
 828    const char *VIRGL_GLES_APPLY_BGRA_DEST_SWIZZLE = "gles_apply_bgra_dest_swizzle";
 829    const char *VIRGL_GLES_SAMPLES_PASSED_VALUE = "gles_samples_passed_value";
 830
 831    if (!screen)
 832       return NULL;
 833
 834    virgl_debug = debug_get_option_virgl_debug();
 835
 836    if (config && config->options) {
 837       screen->tweak_gles_emulate_bgra =
 838             driQueryOptionb(config->options, VIRGL_GLES_EMULATE_BGRA);
 839       screen->tweak_gles_apply_bgra_dest_swizzle =
 840             driQueryOptionb(config->options, VIRGL_GLES_APPLY_BGRA_DEST_SWIZZLE);
 841       screen->tweak_gles_tf3_value =
 842             driQueryOptioni(config->options, VIRGL_GLES_SAMPLES_PASSED_VALUE);
 843    }
 844
 845    screen->tweak_gles_emulate_bgra |= !!(virgl_debug & VIRGL_DEBUG_EMULATE_BGRA);
 846    screen->tweak_gles_apply_bgra_dest_swizzle |= !!(virgl_debug & VIRGL_DEBUG_BGRA_DEST_SWIZZLE);
 847
 848    screen->vws = vws;
 849    screen->base.get_name = virgl_get_name;
 850    screen->base.get_vendor = virgl_get_vendor;
 851    screen->base.get_param = virgl_get_param;
 852    screen->base.get_shader_param = virgl_get_shader_param;
 853    screen->base.get_compute_param = virgl_get_compute_param;
 854    screen->base.get_paramf = virgl_get_paramf;
 855    screen->base.is_format_supported = virgl_is_format_supported;
 856    screen->base.destroy = virgl_destroy_screen;
 857    screen->base.context_create = virgl_context_create;
 858    screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
 859    screen->base.get_timestamp = virgl_get_timestamp;
 860    screen->base.fence_reference = virgl_fence_reference;
 861    //screen->base.fence_signalled = virgl_fence_signalled;
 862    screen->base.fence_finish = virgl_fence_finish;
 863    screen->base.fence_get_fd = virgl_fence_get_fd;
 864
 865    virgl_init_screen_resource_functions(&screen->base);
 866
 867    vws->get_caps(vws, &screen->caps);
 868    fixup_formats(&screen->caps.caps,
 869                  &screen->caps.caps.v2.supported_readback_formats);
 870    fixup_formats(&screen->caps.caps, &screen->caps.caps.v2.scanout);
 871
 872    screen->refcnt = 1;
 873
 874    slab_create_parent(&screen->transfer_pool, sizeof(struct virgl_transfer), 16);
 875
 876    return &screen->base;
 877 }