src/gallium/drivers/vc4/vc4_screen.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 #include "os/os_misc.h"
  26 #include "pipe/p_defines.h"
  27 #include "pipe/p_screen.h"
  28 #include "pipe/p_state.h"
  29
  30 #include "util/u_debug.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_format.h"
  33 #include "util/ralloc.h"
  34
  35 #include "vc4_screen.h"
  36 #include "vc4_context.h"
  37 #include "vc4_resource.h"
  38
  39 static const struct debug_named_value debug_options[] = {
  40         { "cl",       VC4_DEBUG_CL,
  41           "Dump command list during creation" },
  42         { "qpu",      VC4_DEBUG_QPU,
  43           "Dump generated QPU instructions" },
  44         { "qir",      VC4_DEBUG_QIR,
  45           "Dump QPU IR during program compile" },
  46         { "tgsi",     VC4_DEBUG_TGSI,
  47           "Dump TGSI during program compile" },
  48         { "shaderdb", VC4_DEBUG_SHADERDB,
  49           "Dump program compile information for shader-db analysis" },
  50         { "perf",     VC4_DEBUG_PERF,
  51           "Print during performance-related events" },
  52         { "norast",   VC4_DEBUG_NORAST,
  53           "Skip actual hardware execution of commands" },
  54         { "always_flush", VC4_DEBUG_ALWAYS_FLUSH,
  55           "Flush after each draw call" },
  56         { "always_sync", VC4_DEBUG_ALWAYS_SYNC,
  57           "Wait for finish after each flush" },
  58         { NULL }
  59 };
  60
  61 DEBUG_GET_ONCE_FLAGS_OPTION(vc4_debug, "VC4_DEBUG", debug_options, 0)
  62 uint32_t vc4_debug;
  63
  64 static const char *
  65 vc4_screen_get_name(struct pipe_screen *pscreen)
  66 {
  67         return "VC4";
  68 }
  69
  70 static const char *
  71 vc4_screen_get_vendor(struct pipe_screen *pscreen)
  72 {
  73         return "Broadcom";
  74 }
  75
  76 static void
  77 vc4_screen_destroy(struct pipe_screen *pscreen)
  78 {
  79         vc4_bufmgr_destroy(pscreen);
  80         ralloc_free(pscreen);
  81 }
  82
  83 static int
  84 vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
  85 {
  86         switch (param) {
  87                 /* Supported features (boolean caps). */
  88         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
  89         case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
  90         case PIPE_CAP_NPOT_TEXTURES:
  91         case PIPE_CAP_USER_CONSTANT_BUFFERS:
  92         case PIPE_CAP_TEXTURE_SHADOW_MAP:
  93         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  94         case PIPE_CAP_TWO_SIDED_STENCIL:
  95                 return 1;
  96
  97                 /* lying for GL 2.0 */
  98         case PIPE_CAP_OCCLUSION_QUERY:
  99         case PIPE_CAP_POINT_SPRITE:
 100                 return 1;
 101
 102         case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 103                 return 256;
 104
 105         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 106                 return 120;
 107
 108         case PIPE_CAP_MAX_VIEWPORTS:
 109                 return 1;
 110
 111         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 112         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 113                 return 1;
 114
 115         case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 116                 return 1;
 117
 118                 /* Unsupported features. */
 119         case PIPE_CAP_ANISOTROPIC_FILTER:
 120         case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 121         case PIPE_CAP_CUBE_MAP_ARRAY:
 122         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 123         case PIPE_CAP_TEXTURE_SWIZZLE:
 124         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 125         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 126         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 127         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 128         case PIPE_CAP_TGSI_INSTANCEID:
 129         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 130         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 131         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 132         case PIPE_CAP_COMPUTE:
 133         case PIPE_CAP_START_INSTANCE:
 134         case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 135         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 136         case PIPE_CAP_TGSI_TEXCOORD:
 137         case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 138         case PIPE_CAP_CONDITIONAL_RENDER:
 139         case PIPE_CAP_PRIMITIVE_RESTART:
 140         case PIPE_CAP_TEXTURE_MULTISAMPLE:
 141         case PIPE_CAP_TEXTURE_BARRIER:
 142         case PIPE_CAP_SM3:
 143         case PIPE_CAP_INDEP_BLEND_ENABLE:
 144         case PIPE_CAP_INDEP_BLEND_FUNC:
 145         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 146         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 147         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 148         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 149         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 150         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 151         case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 152         case PIPE_CAP_USER_VERTEX_BUFFERS:
 153         case PIPE_CAP_USER_INDEX_BUFFERS:
 154         case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 155         case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 156         case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 157         case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 158         case PIPE_CAP_TEXTURE_GATHER_SM5:
 159         case PIPE_CAP_FAKE_SW_MSAA:
 160         case PIPE_CAP_TEXTURE_QUERY_LOD:
 161         case PIPE_CAP_SAMPLE_SHADING:
 162         case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 163         case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 164         case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 165         case PIPE_CAP_MAX_TEXEL_OFFSET:
 166         case PIPE_CAP_MAX_VERTEX_STREAMS:
 167         case PIPE_CAP_DRAW_INDIRECT:
 168         case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 169         case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 170         case PIPE_CAP_SAMPLER_VIEW_TARGET:
 171         case PIPE_CAP_CLIP_HALFZ:
 172         case PIPE_CAP_VERTEXID_NOBASE:
 173                 return 0;
 174
 175                 /* Stream output. */
 176         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 177         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 178         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 179         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 180                 return 0;
 181
 182                 /* Geometry shader output, unsupported. */
 183         case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 184         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 185                 return 0;
 186
 187                 /* Texturing. */
 188         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 189         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 190                 return VC4_MAX_MIP_LEVELS;
 191         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 192                 /* Note: Not supported in hardware, just faking it. */
 193                 return 5;
 194         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 195                 return 0;
 196
 197                 /* Render targets. */
 198         case PIPE_CAP_MAX_RENDER_TARGETS:
 199                 return 1;
 200
 201                 /* Queries. */
 202         case PIPE_CAP_QUERY_TIME_ELAPSED:
 203         case PIPE_CAP_QUERY_TIMESTAMP:
 204                 return 0;
 205
 206         case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 207         case PIPE_CAP_MIN_TEXEL_OFFSET:
 208                 return 0;
 209
 210         case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 211                 return 2048;
 212
 213         case PIPE_CAP_ENDIANNESS:
 214                 return PIPE_ENDIAN_LITTLE;
 215
 216         case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 217                 return 64;
 218
 219         case PIPE_CAP_VENDOR_ID:
 220                 return 0x14E4;
 221         case PIPE_CAP_DEVICE_ID:
 222                 return 0xFFFFFFFF;
 223         case PIPE_CAP_ACCELERATED:
 224                 return 1;
 225         case PIPE_CAP_VIDEO_MEMORY: {
 226                 uint64_t system_memory;
 227
 228                 if (!os_get_total_physical_memory(&system_memory))
 229                         return 0;
 230
 231                 return (int)(system_memory >> 20);
 232         }
 233         case PIPE_CAP_UMA:
 234                 return 1;
 235
 236         default:
 237                 fprintf(stderr, "unknown param %d\n", param);
 238                 return 0;
 239         }
 240 }
 241
 242 static float
 243 vc4_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param)
 244 {
 245         switch (param) {
 246         case PIPE_CAPF_MAX_LINE_WIDTH:
 247         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 248                 return 32;
 249
 250         case PIPE_CAPF_MAX_POINT_WIDTH:
 251         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 252                 return 512.0f;
 253
 254         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 255                 return 0.0f;
 256         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 257                 return 0.0f;
 258         case PIPE_CAPF_GUARD_BAND_LEFT:
 259         case PIPE_CAPF_GUARD_BAND_TOP:
 260         case PIPE_CAPF_GUARD_BAND_RIGHT:
 261         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 262                 return 0.0f;
 263         default:
 264                 fprintf(stderr, "unknown paramf %d\n", param);
 265                 return 0;
 266         }
 267 }
 268
 269 static int
 270 vc4_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
 271                            enum pipe_shader_cap param)
 272 {
 273         if (shader != PIPE_SHADER_VERTEX &&
 274             shader != PIPE_SHADER_FRAGMENT) {
 275                 return 0;
 276         }
 277
 278         /* this is probably not totally correct.. but it's a start: */
 279         switch (param) {
 280         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 281         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 282         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 283         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 284                 return 16384;
 285         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 286                 return 0;
 287         case PIPE_SHADER_CAP_MAX_INPUTS:
 288                 if (shader == PIPE_SHADER_FRAGMENT)
 289                         return 8;
 290                 else
 291                         return 16;
 292         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 293                 return shader == PIPE_SHADER_FRAGMENT ? 1 : 8;
 294         case PIPE_SHADER_CAP_MAX_TEMPS:
 295                 return 256; /* GL_MAX_PROGRAM_TEMPORARIES_ARB */
 296         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 297                 return 16 * 1024 * sizeof(float);
 298         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 299                 return 1;
 300         case PIPE_SHADER_CAP_MAX_PREDS:
 301                 return 0; /* nothing uses this */
 302         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 303                 return 0;
 304         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 305         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 306         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 307                 return 0;
 308         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 309                 return 1;
 310         case PIPE_SHADER_CAP_SUBROUTINES:
 311                 return 0;
 312         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 313                 return 0;
 314         case PIPE_SHADER_CAP_INTEGERS:
 315                 return 1;
 316         case PIPE_SHADER_CAP_DOUBLES:
 317                 return 0;
 318         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 319         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 320                 return VC4_MAX_TEXTURE_SAMPLERS;
 321         case PIPE_SHADER_CAP_PREFERRED_IR:
 322                 return PIPE_SHADER_IR_TGSI;
 323         default:
 324                 fprintf(stderr, "unknown shader param %d\n", param);
 325                 return 0;
 326         }
 327         return 0;
 328 }
 329
 330 static boolean
 331 vc4_screen_is_format_supported(struct pipe_screen *pscreen,
 332                                enum pipe_format format,
 333                                enum pipe_texture_target target,
 334                                unsigned sample_count,
 335                                unsigned usage)
 336 {
 337         unsigned retval = 0;
 338
 339         if ((target >= PIPE_MAX_TEXTURE_TYPES) ||
 340             (sample_count > 1) ||
 341             !util_format_is_supported(format, usage)) {
 342                 return FALSE;
 343         }
 344
 345         if (usage & PIPE_BIND_VERTEX_BUFFER) {
 346                 switch (format) {
 347                 case PIPE_FORMAT_R32G32B32A32_FLOAT:
 348                 case PIPE_FORMAT_R32G32B32_FLOAT:
 349                 case PIPE_FORMAT_R32G32_FLOAT:
 350                 case PIPE_FORMAT_R32_FLOAT:
 351                 case PIPE_FORMAT_R32G32B32A32_SNORM:
 352                 case PIPE_FORMAT_R32G32B32_SNORM:
 353                 case PIPE_FORMAT_R32G32_SNORM:
 354                 case PIPE_FORMAT_R32_SNORM:
 355                 case PIPE_FORMAT_R32G32B32A32_SSCALED:
 356                 case PIPE_FORMAT_R32G32B32_SSCALED:
 357                 case PIPE_FORMAT_R32G32_SSCALED:
 358                 case PIPE_FORMAT_R32_SSCALED:
 359                 case PIPE_FORMAT_R16G16B16A16_UNORM:
 360                 case PIPE_FORMAT_R16G16B16_UNORM:
 361                 case PIPE_FORMAT_R16G16_UNORM:
 362                 case PIPE_FORMAT_R16_UNORM:
 363                 case PIPE_FORMAT_R16G16B16A16_SNORM:
 364                 case PIPE_FORMAT_R16G16B16_SNORM:
 365                 case PIPE_FORMAT_R16G16_SNORM:
 366                 case PIPE_FORMAT_R16_SNORM:
 367                 case PIPE_FORMAT_R16G16B16A16_USCALED:
 368                 case PIPE_FORMAT_R16G16B16_USCALED:
 369                 case PIPE_FORMAT_R16G16_USCALED:
 370                 case PIPE_FORMAT_R16_USCALED:
 371                 case PIPE_FORMAT_R16G16B16A16_SSCALED:
 372                 case PIPE_FORMAT_R16G16B16_SSCALED:
 373                 case PIPE_FORMAT_R16G16_SSCALED:
 374                 case PIPE_FORMAT_R16_SSCALED:
 375                 case PIPE_FORMAT_R8G8B8A8_UNORM:
 376                 case PIPE_FORMAT_R8G8B8_UNORM:
 377                 case PIPE_FORMAT_R8G8_UNORM:
 378                 case PIPE_FORMAT_R8_UNORM:
 379                 case PIPE_FORMAT_R8G8B8A8_SNORM:
 380                 case PIPE_FORMAT_R8G8B8_SNORM:
 381                 case PIPE_FORMAT_R8G8_SNORM:
 382                 case PIPE_FORMAT_R8_SNORM:
 383                 case PIPE_FORMAT_R8G8B8A8_USCALED:
 384                 case PIPE_FORMAT_R8G8B8_USCALED:
 385                 case PIPE_FORMAT_R8G8_USCALED:
 386                 case PIPE_FORMAT_R8_USCALED:
 387                 case PIPE_FORMAT_R8G8B8A8_SSCALED:
 388                 case PIPE_FORMAT_R8G8B8_SSCALED:
 389                 case PIPE_FORMAT_R8G8_SSCALED:
 390                 case PIPE_FORMAT_R8_SSCALED:
 391                         retval |= PIPE_BIND_VERTEX_BUFFER;
 392                         break;
 393                 default:
 394                         break;
 395                 }
 396         }
 397
 398         if ((usage & PIPE_BIND_RENDER_TARGET) &&
 399             vc4_rt_format_supported(format)) {
 400                 retval |= PIPE_BIND_RENDER_TARGET;
 401         }
 402
 403         if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 404             (vc4_tex_format_supported(format))) {
 405                 retval |= PIPE_BIND_SAMPLER_VIEW;
 406         }
 407
 408         if ((usage & PIPE_BIND_DEPTH_STENCIL) &&
 409             (format == PIPE_FORMAT_S8_UINT_Z24_UNORM ||
 410              format == PIPE_FORMAT_X8Z24_UNORM)) {
 411                 retval |= PIPE_BIND_DEPTH_STENCIL;
 412         }
 413
 414         if ((usage & PIPE_BIND_INDEX_BUFFER) &&
 415             (format == PIPE_FORMAT_I8_UINT ||
 416              format == PIPE_FORMAT_I16_UINT)) {
 417                 retval |= PIPE_BIND_INDEX_BUFFER;
 418         }
 419
 420         if (usage & PIPE_BIND_TRANSFER_READ)
 421                 retval |= PIPE_BIND_TRANSFER_READ;
 422         if (usage & PIPE_BIND_TRANSFER_WRITE)
 423                 retval |= PIPE_BIND_TRANSFER_WRITE;
 424
 425 #if 0
 426         if (retval != usage) {
 427                 fprintf(stderr,
 428                         "not supported: format=%s, target=%d, sample_count=%d, "
 429                         "usage=0x%x, retval=0x%x\n", util_format_name(format),
 430                         target, sample_count, usage, retval);
 431         }
 432 #endif
 433
 434         return retval == usage;
 435 }
 436
 437 struct pipe_screen *
 438 vc4_screen_create(int fd)
 439 {
 440         struct vc4_screen *screen = rzalloc(NULL, struct vc4_screen);
 441         struct pipe_screen *pscreen;
 442
 443         pscreen = &screen->base;
 444
 445         pscreen->destroy = vc4_screen_destroy;
 446         pscreen->get_param = vc4_screen_get_param;
 447         pscreen->get_paramf = vc4_screen_get_paramf;
 448         pscreen->get_shader_param = vc4_screen_get_shader_param;
 449         pscreen->context_create = vc4_context_create;
 450         pscreen->is_format_supported = vc4_screen_is_format_supported;
 451
 452         screen->fd = fd;
 453         make_empty_list(&screen->bo_cache.time_list);
 454
 455         vc4_fence_init(screen);
 456
 457         vc4_debug = debug_get_option_vc4_debug();
 458         if (vc4_debug & VC4_DEBUG_SHADERDB)
 459                 vc4_debug |= VC4_DEBUG_NORAST;
 460
 461 #if USE_VC4_SIMULATOR
 462         vc4_simulator_init(screen);
 463 #endif
 464
 465         vc4_resource_screen_init(pscreen);
 466
 467         pscreen->get_name = vc4_screen_get_name;
 468         pscreen->get_vendor = vc4_screen_get_vendor;
 469
 470         return pscreen;
 471 }
 472
 473 boolean
 474 vc4_screen_bo_get_handle(struct pipe_screen *pscreen,
 475                          struct vc4_bo *bo,
 476                          unsigned stride,
 477                          struct winsys_handle *whandle)
 478 {
 479         whandle->stride = stride;
 480
 481         switch (whandle->type) {
 482         case DRM_API_HANDLE_TYPE_SHARED:
 483                 return vc4_bo_flink(bo, &whandle->handle);
 484         case DRM_API_HANDLE_TYPE_KMS:
 485                 whandle->handle = bo->handle;
 486                 return TRUE;
 487         case DRM_API_HANDLE_TYPE_FD:
 488                 whandle->handle = vc4_bo_get_dmabuf(bo);
 489                 return whandle->handle != -1;
 490         }
 491
 492         return FALSE;
 493 }
 494
 495 struct vc4_bo *
 496 vc4_screen_bo_from_handle(struct pipe_screen *pscreen,
 497                           struct winsys_handle *whandle)
 498 {
 499         struct vc4_screen *screen = vc4_screen(pscreen);
 500
 501         switch (whandle->type) {
 502         case DRM_API_HANDLE_TYPE_SHARED:
 503                 return vc4_bo_open_name(screen, whandle->handle, whandle->stride);
 504         case DRM_API_HANDLE_TYPE_FD:
 505                 return vc4_bo_open_dmabuf(screen, whandle->handle, whandle->stride);
 506         default:
 507                 fprintf(stderr,
 508                         "Attempt to import unsupported handle type %d\n",
 509                         whandle->type);
 510                 return NULL;
 511         }
 512 }