src/gallium/drivers/softpipe/sp_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "util/u_memory.h"
  30 #include "util/u_format.h"
  31 #include "util/u_format_s3tc.h"
  32 #include "util/u_video.h"
  33 #include "os/os_misc.h"
  34 #include "os/os_time.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "draw/draw_context.h"
  38
  39 #include "state_tracker/sw_winsys.h"
  40 #include "tgsi/tgsi_exec.h"
  41
  42 #include "sp_texture.h"
  43 #include "sp_screen.h"
  44 #include "sp_context.h"
  45 #include "sp_fence.h"
  46 #include "sp_public.h"
  47
  48 DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
  49
  50 static const char *
  51 softpipe_get_vendor(struct pipe_screen *screen)
  52 {
  53    return "VMware, Inc.";
  54 }
  55
  56
  57 static const char *
  58 softpipe_get_name(struct pipe_screen *screen)
  59 {
  60    return "softpipe";
  61 }
  62
  63
  64 static int
  65 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  66 {
  67    switch (param) {
  68    case PIPE_CAP_NPOT_TEXTURES:
  69    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  70    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
  71       return 1;
  72    case PIPE_CAP_TWO_SIDED_STENCIL:
  73       return 1;
  74    case PIPE_CAP_SM3:
  75       return 1;
  76    case PIPE_CAP_ANISOTROPIC_FILTER:
  77       return 1;
  78    case PIPE_CAP_POINT_SPRITE:
  79       return 1;
  80    case PIPE_CAP_MAX_RENDER_TARGETS:
  81       return PIPE_MAX_COLOR_BUFS;
  82    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  83       return 1;
  84    case PIPE_CAP_OCCLUSION_QUERY:
  85       return 1;
  86    case PIPE_CAP_QUERY_TIME_ELAPSED:
  87       return 1;
  88    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
  89       return 1;
  90    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  91       return 1;
  92    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  93       return 1;
  94    case PIPE_CAP_TEXTURE_SWIZZLE:
  95       return 1;
  96    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
  97       return 0;
  98    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  99       return SP_MAX_TEXTURE_2D_LEVELS;
 100    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 101       return SP_MAX_TEXTURE_3D_LEVELS;
 102    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 103       return SP_MAX_TEXTURE_CUBE_LEVELS;
 104    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 105       return 1;
 106    case PIPE_CAP_INDEP_BLEND_ENABLE:
 107       return 1;
 108    case PIPE_CAP_INDEP_BLEND_FUNC:
 109       return 1;
 110    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 111    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_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_DEPTH_CLIP_DISABLE:
 116       return 1;
 117    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 118       return PIPE_MAX_SO_BUFFERS;
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 120    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 121       return 16*4;
 122    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 123    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 124       return 1024;
 125    case PIPE_CAP_MAX_VERTEX_STREAMS:
 126       return 1;
 127    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 128       return 2048;
 129    case PIPE_CAP_PRIMITIVE_RESTART:
 130       return 1;
 131    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 132       return 1;
 133    case PIPE_CAP_TGSI_INSTANCEID:
 134    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 135    case PIPE_CAP_START_INSTANCE:
 136       return 1;
 137    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 138    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 139       return 1;
 140    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 141       return 256; /* for GL3 */
 142    case PIPE_CAP_MIN_TEXEL_OFFSET:
 143       return -8;
 144    case PIPE_CAP_MAX_TEXEL_OFFSET:
 145       return 7;
 146    case PIPE_CAP_CONDITIONAL_RENDER:
 147       return 1;
 148    case PIPE_CAP_TEXTURE_BARRIER:
 149       return 0;
 150    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 151    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 152    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 153       return 1;
 154    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 155       return 0;
 156    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 157       return 330;
 158    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 159       return 0;
 160    case PIPE_CAP_COMPUTE:
 161       return 1;
 162    case PIPE_CAP_USER_VERTEX_BUFFERS:
 163    case PIPE_CAP_USER_INDEX_BUFFERS:
 164    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 165    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 166    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 167    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 168    case PIPE_CAP_DOUBLES:
 169    case PIPE_CAP_INT64:
 170       return 1;
 171    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 172       return 16;
 173    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 174    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 175    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 176    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 177    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 178       return 0;
 179    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 180       return 64;
 181    case PIPE_CAP_QUERY_TIMESTAMP:
 182    case PIPE_CAP_CUBE_MAP_ARRAY:
 183       return 1;
 184    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 185       return 1;
 186    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 187       return 0;
 188    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 189       return 65536;
 190    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 191       return 0;
 192    case PIPE_CAP_TGSI_TEXCOORD:
 193    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 194       return 0;
 195    case PIPE_CAP_MAX_VIEWPORTS:
 196       return PIPE_MAX_VIEWPORTS;
 197    case PIPE_CAP_ENDIANNESS:
 198       return PIPE_ENDIAN_NATIVE;
 199    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 200       return 4;
 201    case PIPE_CAP_TEXTURE_GATHER_SM5:
 202    case PIPE_CAP_TEXTURE_QUERY_LOD:
 203       return 1;
 204    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 205    case PIPE_CAP_SAMPLE_SHADING:
 206    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 207       return 0;
 208    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 209       return 1;
 210    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 211       return 0;
 212    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 213       return 1;
 214    case PIPE_CAP_FAKE_SW_MSAA:
 215       return 1;
 216    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 217       return -32;
 218    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 219       return 31;
 220    case PIPE_CAP_DRAW_INDIRECT:
 221       return 1;
 222
 223    case PIPE_CAP_VENDOR_ID:
 224       return 0xFFFFFFFF;
 225    case PIPE_CAP_DEVICE_ID:
 226       return 0xFFFFFFFF;
 227    case PIPE_CAP_ACCELERATED:
 228       return 0;
 229    case PIPE_CAP_VIDEO_MEMORY: {
 230       /* XXX: Do we want to return the full amount fo system memory ? */
 231       uint64_t system_memory;
 232
 233       if (!os_get_total_physical_memory(&system_memory))
 234          return 0;
 235
 236       if (sizeof(void *) == 4)
 237          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
 238           * eat application memory, which is quite limited on 32 bits. App
 239           * shouldn't expect too much available memory. */
 240          system_memory = MIN2(system_memory, 2048 << 20);
 241
 242       return (int)(system_memory >> 20);
 243    }
 244    case PIPE_CAP_UMA:
 245       return 0;
 246    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 247       return 1;
 248    case PIPE_CAP_CLIP_HALFZ:
 249    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 250    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 251       return 1;
 252    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 253    case PIPE_CAP_CULL_DISTANCE:
 254       return 1;
 255    case PIPE_CAP_VERTEXID_NOBASE:
 256       return 0;
 257    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 258       return 0;
 259    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 260    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 261       return 1;
 262    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 263    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 264    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 265    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 266    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 267    case PIPE_CAP_TGSI_TXQS:
 268    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 269    case PIPE_CAP_SHAREABLE_SHADERS:
 270    case PIPE_CAP_CLEAR_TEXTURE:
 271    case PIPE_CAP_DRAW_PARAMETERS:
 272    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 273    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 274    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 275    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 276    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 277    case PIPE_CAP_INVALIDATE_BUFFER:
 278    case PIPE_CAP_GENERATE_MIPMAP:
 279    case PIPE_CAP_STRING_MARKER:
 280    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 281    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 282    case PIPE_CAP_QUERY_MEMORY_INFO:
 283    case PIPE_CAP_PCI_GROUP:
 284    case PIPE_CAP_PCI_BUS:
 285    case PIPE_CAP_PCI_DEVICE:
 286    case PIPE_CAP_PCI_FUNCTION:
 287    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 288    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 289    case PIPE_CAP_TGSI_VOTE:
 290    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 291    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 292    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 293    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 294    case PIPE_CAP_NATIVE_FENCE_FD:
 295    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 296    case PIPE_CAP_TGSI_FS_FBFETCH:
 297    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 298       return 0;
 299    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 300       return 4;
 301    }
 302    /* should only get here on unhandled cases */
 303    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 304    return 0;
 305 }
 306
 307 static int
 308 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 309 {
 310    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 311    switch(shader)
 312    {
 313    case PIPE_SHADER_FRAGMENT:
 314       return tgsi_exec_get_shader_param(param);
 315    case PIPE_SHADER_COMPUTE:
 316       return tgsi_exec_get_shader_param(param);
 317    case PIPE_SHADER_VERTEX:
 318    case PIPE_SHADER_GEOMETRY:
 319       if (sp_screen->use_llvm)
 320          return draw_get_shader_param(shader, param);
 321       else
 322          return draw_get_shader_param_no_llvm(shader, param);
 323    default:
 324       return 0;
 325    }
 326 }
 327
 328 static float
 329 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 330 {
 331    switch (param) {
 332    case PIPE_CAPF_MAX_LINE_WIDTH:
 333       /* fall-through */
 334    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 335       return 255.0; /* arbitrary */
 336    case PIPE_CAPF_MAX_POINT_WIDTH:
 337       /* fall-through */
 338    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 339       return 255.0; /* arbitrary */
 340    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 341       return 16.0;
 342    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 343       return 16.0; /* arbitrary */
 344    case PIPE_CAPF_GUARD_BAND_LEFT:
 345    case PIPE_CAPF_GUARD_BAND_TOP:
 346    case PIPE_CAPF_GUARD_BAND_RIGHT:
 347    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 348       return 0.0;
 349    }
 350    /* should only get here on unhandled cases */
 351    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 352    return 0.0;
 353 }
 354
 355 /**
 356  * Query format support for creating a texture, drawing surface, etc.
 357  * \param format  the format to test
 358  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 359  */
 360 static boolean
 361 softpipe_is_format_supported( struct pipe_screen *screen,
 362                               enum pipe_format format,
 363                               enum pipe_texture_target target,
 364                               unsigned sample_count,
 365                               unsigned bind)
 366 {
 367    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 368    const struct util_format_description *format_desc;
 369
 370    assert(target == PIPE_BUFFER ||
 371           target == PIPE_TEXTURE_1D ||
 372           target == PIPE_TEXTURE_1D_ARRAY ||
 373           target == PIPE_TEXTURE_2D ||
 374           target == PIPE_TEXTURE_2D_ARRAY ||
 375           target == PIPE_TEXTURE_RECT ||
 376           target == PIPE_TEXTURE_3D ||
 377           target == PIPE_TEXTURE_CUBE ||
 378           target == PIPE_TEXTURE_CUBE_ARRAY);
 379
 380    format_desc = util_format_description(format);
 381    if (!format_desc)
 382       return FALSE;
 383
 384    if (sample_count > 1)
 385       return FALSE;
 386
 387    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 388                PIPE_BIND_SCANOUT |
 389                PIPE_BIND_SHARED)) {
 390       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 391          return FALSE;
 392    }
 393
 394    if (bind & PIPE_BIND_RENDER_TARGET) {
 395       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 396          return FALSE;
 397
 398       /*
 399        * Although possible, it is unnatural to render into compressed or YUV
 400        * surfaces. So disable these here to avoid going into weird paths
 401        * inside the state trackers.
 402        */
 403       if (format_desc->block.width != 1 ||
 404           format_desc->block.height != 1)
 405          return FALSE;
 406    }
 407
 408    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 409       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 410          return FALSE;
 411    }
 412
 413    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC ||
 414        format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 415       /* Software decoding is not hooked up. */
 416       return FALSE;
 417    }
 418
 419    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 420        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0) &&
 421        target != PIPE_BUFFER) {
 422       const struct util_format_description *desc =
 423          util_format_description(format);
 424       if (desc->nr_channels == 3 && desc->is_array) {
 425          /* Don't support any 3-component formats for rendering/texturing
 426           * since we don't support the corresponding 8-bit 3 channel UNORM
 427           * formats.  This allows us to support GL_ARB_copy_image between
 428           * GL_RGB8 and GL_RGB8UI, for example.  Otherwise, we may be asked to
 429           * do a resource copy between PIPE_FORMAT_R8G8B8_UINT and
 430           * PIPE_FORMAT_R8G8B8X8_UNORM, for example, which will not work
 431           * (different bpp).
 432           */
 433          return FALSE;
 434       }
 435    }
 436
 437    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 438        format != PIPE_FORMAT_ETC1_RGB8)
 439       return FALSE;
 440
 441    /*
 442     * All other operations (sampling, transfer, etc).
 443     */
 444
 445    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 446       return util_format_s3tc_enabled;
 447    }
 448
 449    /*
 450     * Everything else should be supported by u_format.
 451     */
 452    return TRUE;
 453 }
 454
 455
 456 static void
 457 softpipe_destroy_screen( struct pipe_screen *screen )
 458 {
 459    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 460    struct sw_winsys *winsys = sp_screen->winsys;
 461
 462    if(winsys->destroy)
 463       winsys->destroy(winsys);
 464
 465    FREE(screen);
 466 }
 467
 468
 469 /* This is often overriden by the co-state tracker.
 470  */
 471 static void
 472 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 473                            struct pipe_resource *resource,
 474                            unsigned level, unsigned layer,
 475                            void *context_private,
 476                            struct pipe_box *sub_box)
 477 {
 478    struct softpipe_screen *screen = softpipe_screen(_screen);
 479    struct sw_winsys *winsys = screen->winsys;
 480    struct softpipe_resource *texture = softpipe_resource(resource);
 481
 482    assert(texture->dt);
 483    if (texture->dt)
 484       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 485 }
 486
 487 static uint64_t
 488 softpipe_get_timestamp(struct pipe_screen *_screen)
 489 {
 490    return os_time_get_nano();
 491 }
 492
 493 static int
 494 softpipe_get_compute_param(struct pipe_screen *_screen,
 495                            enum pipe_shader_ir ir_type,
 496                            enum pipe_compute_cap param,
 497                            void *ret)
 498 {
 499    switch (param) {
 500    case PIPE_COMPUTE_CAP_IR_TARGET:
 501       return 0;
 502    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 503       if (ret) {
 504          uint64_t *grid_size = ret;
 505          grid_size[0] = 65535;
 506          grid_size[1] = 65535;
 507          grid_size[2] = 65535;
 508       }
 509       return 3 * sizeof(uint64_t) ;
 510    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 511       if (ret) {
 512          uint64_t *block_size = ret;
 513          block_size[0] = 1024;
 514          block_size[1] = 1024;
 515          block_size[2] = 1024;
 516       }
 517       return 3 * sizeof(uint64_t);
 518    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 519       if (ret) {
 520          uint64_t *max_threads_per_block = ret;
 521          *max_threads_per_block = 1024;
 522       }
 523       return sizeof(uint64_t);
 524    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 525       if (ret) {
 526          uint64_t *max_local_size = ret;
 527          *max_local_size = 32768;
 528       }
 529       return sizeof(uint64_t);
 530    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
 531    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
 532    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
 533    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
 534    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
 535    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
 536    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
 537    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
 538    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
 539    case PIPE_COMPUTE_CAP_ADDRESS_BITS:
 540    case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
 541       break;
 542    }
 543    return 0;
 544 }
 545
 546 /**
 547  * Create a new pipe_screen object
 548  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 549  */
 550 struct pipe_screen *
 551 softpipe_create_screen(struct sw_winsys *winsys)
 552 {
 553    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 554
 555    if (!screen)
 556       return NULL;
 557
 558    screen->winsys = winsys;
 559
 560    screen->base.destroy = softpipe_destroy_screen;
 561
 562    screen->base.get_name = softpipe_get_name;
 563    screen->base.get_vendor = softpipe_get_vendor;
 564    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
 565    screen->base.get_param = softpipe_get_param;
 566    screen->base.get_shader_param = softpipe_get_shader_param;
 567    screen->base.get_paramf = softpipe_get_paramf;
 568    screen->base.get_timestamp = softpipe_get_timestamp;
 569    screen->base.is_format_supported = softpipe_is_format_supported;
 570    screen->base.context_create = softpipe_create_context;
 571    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 572    screen->base.get_compute_param = softpipe_get_compute_param;
 573    screen->use_llvm = debug_get_option_use_llvm();
 574
 575    util_format_s3tc_init();
 576
 577    softpipe_init_screen_texture_funcs(&screen->base);
 578    softpipe_init_screen_fence_funcs(&screen->base);
 579
 580    return &screen->base;
 581 }