src/gallium/drivers/iris/iris_screen.c

   1 /*
   2  * Copyright © 2017 Intel Corporation
   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
  24 /**
  25  * @file iris_screen.c
  26  *
  27  * Screen related driver hooks and capability lists.
  28  *
  29  * A program may use multiple rendering contexts (iris_context), but
  30  * they all share a common screen (iris_screen).  Global driver state
  31  * can be stored in the screen; it may be accessed by multiple threads.
  32  */
  33
  34 #include <stdio.h>
  35 #include <errno.h>
  36 #include <sys/ioctl.h>
  37 #include "pipe/p_defines.h"
  38 #include "pipe/p_state.h"
  39 #include "pipe/p_context.h"
  40 #include "pipe/p_screen.h"
  41 #include "util/u_inlines.h"
  42 #include "util/u_format.h"
  43 #include "util/u_upload_mgr.h"
  44 #include "util/ralloc.h"
  45 #include "drm-uapi/i915_drm.h"
  46 #include "iris_context.h"
  47 #include "iris_pipe.h"
  48 #include "iris_resource.h"
  49 #include "iris_screen.h"
  50 #include "intel/compiler/brw_compiler.h"
  51
  52 static void
  53 iris_flush_frontbuffer(struct pipe_screen *_screen,
  54                        struct pipe_resource *resource,
  55                        unsigned level, unsigned layer,
  56                        void *context_private, struct pipe_box *box)
  57 {
  58 }
  59
  60 static const char *
  61 iris_get_vendor(struct pipe_screen *pscreen)
  62 {
  63    return "Mesa Project";
  64 }
  65
  66 static const char *
  67 iris_get_device_vendor(struct pipe_screen *pscreen)
  68 {
  69    return "Intel";
  70 }
  71
  72 static const char *
  73 iris_get_name(struct pipe_screen *pscreen)
  74 {
  75    struct iris_screen *screen = (struct iris_screen *)pscreen;
  76    const char *chipset;
  77
  78    switch (screen->pci_id) {
  79 #undef CHIPSET
  80 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
  81 #include "pci_ids/i965_pci_ids.h"
  82    default:
  83       chipset = "Unknown Intel Chipset";
  84       break;
  85    }
  86    return &chipset[9];
  87 }
  88
  89 static int
  90 iris_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
  91 {
  92    struct iris_screen *screen = (struct iris_screen *)pscreen;
  93
  94    switch (param) {
  95    case PIPE_CAP_NPOT_TEXTURES:
  96    case PIPE_CAP_ANISOTROPIC_FILTER:
  97    case PIPE_CAP_POINT_SPRITE:
  98    case PIPE_CAP_OCCLUSION_QUERY:
  99    case PIPE_CAP_QUERY_TIME_ELAPSED:
 100    case PIPE_CAP_TEXTURE_SWIZZLE:
 101    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
 102    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 103    case PIPE_CAP_SM3:
 104    case PIPE_CAP_PRIMITIVE_RESTART:
 105    case PIPE_CAP_INDEP_BLEND_ENABLE:
 106    case PIPE_CAP_INDEP_BLEND_FUNC:
 107    case PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND:
 108    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 109    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 110    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 111    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 112    case PIPE_CAP_TGSI_INSTANCEID:
 113    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 114    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 115    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 116    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 117    case PIPE_CAP_CONDITIONAL_RENDER:
 118    case PIPE_CAP_TEXTURE_BARRIER:
 119    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 120    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 121    case PIPE_CAP_COMPUTE:
 122    case PIPE_CAP_START_INSTANCE:
 123    case PIPE_CAP_QUERY_TIMESTAMP:
 124    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 125    case PIPE_CAP_CUBE_MAP_ARRAY:
 126    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 127    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 128    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 129    case PIPE_CAP_TEXTURE_QUERY_LOD:
 130    case PIPE_CAP_SAMPLE_SHADING:
 131    case PIPE_CAP_DRAW_INDIRECT:
 132    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 133    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 134    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 135    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 136    case PIPE_CAP_ACCELERATED:
 137    case PIPE_CAP_UMA:
 138    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 139    case PIPE_CAP_CLIP_HALFZ:
 140    case PIPE_CAP_TGSI_TEXCOORD:
 141    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 142    case PIPE_CAP_DOUBLES:
 143    case PIPE_CAP_INT64:
 144    case PIPE_CAP_INT64_DIVMOD:
 145    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 146    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 147    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 148    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 149    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 150    case PIPE_CAP_CULL_DISTANCE:
 151    case PIPE_CAP_PACKED_UNIFORMS:
 152    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 153    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 154    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 155    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 156    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 157    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 158    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 159    case PIPE_CAP_POST_DEPTH_COVERAGE:
 160    case PIPE_CAP_QUERY_SO_OVERFLOW:
 161    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 162    case PIPE_CAP_TGSI_CLOCK:
 163    case PIPE_CAP_TGSI_BALLOT:
 164       return true;
 165
 166    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 167    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 168    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 169    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 170    case PIPE_CAP_USER_VERTEX_BUFFERS:
 171    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 172    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 173    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 174    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 175    case PIPE_CAP_FAKE_SW_MSAA:
 176    case PIPE_CAP_VERTEXID_NOBASE:
 177    case PIPE_CAP_FENCE_SIGNAL:
 178    case PIPE_CAP_CONSTBUF0_FLAGS:
 179    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 180    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 181    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 182    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 183    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 184    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 185    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 186    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 187    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 188    case PIPE_CAP_GENERATE_MIPMAP:
 189    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 190    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 191    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 192    case PIPE_CAP_TILE_RASTER_ORDER:
 193    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 194    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 195    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 196    case PIPE_CAP_BINDLESS_TEXTURE:
 197    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 198       return false;
 199
 200    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 201       /* Intel GPUs don't support PIPE_TEX_WRAP_MIRROR_CLAMP or
 202        * PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER.
 203        */
 204       return false;
 205
 206    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 207       return 1;
 208    case PIPE_CAP_MAX_RENDER_TARGETS:
 209       return BRW_MAX_DRAW_BUFFERS;
 210    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 211    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 212       return 15; /* 16384x16384 */
 213    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 214       return 12; /* 2048x2048 */
 215    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 216       return 4;
 217    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 218       return 2048;
 219    case PIPE_CAP_MIN_TEXEL_OFFSET:
 220       return -8;
 221    case PIPE_CAP_MAX_TEXEL_OFFSET:
 222       return 7;
 223    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 224       return BRW_MAX_SOL_BINDINGS / IRIS_MAX_SOL_BUFFERS;
 225    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 226       return BRW_MAX_SOL_BINDINGS;
 227    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 228       return 460;
 229    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 230       return 140;
 231    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 232       /* 3DSTATE_CONSTANT_XS requires the start of UBOs to be 32B aligned */
 233       return 32;
 234    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 235       /* Choose a cacheline (64 bytes) so that we can safely have the CPU and
 236        * GPU writing the same SSBO on non-coherent systems (Atom CPUs).  With
 237        * UBOs, the GPU never writes, so there's no problem.  For an SSBO, the
 238        * GPU and the CPU can be updating disjoint regions of the buffer
 239        * simultaneously and that will break if the regions overlap the same
 240        * cacheline.
 241        */
 242       return 64;
 243    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 244       return 64; // XXX: ?
 245    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 246       return 16;
 247    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 248       return true; // XXX: ?????
 249    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 250       return 1 << 27; /* 128MB */
 251    case PIPE_CAP_MAX_VIEWPORTS:
 252       return 16;
 253    case PIPE_CAP_ENDIANNESS:
 254       return PIPE_ENDIAN_LITTLE;
 255    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 256       return 256;
 257    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 258       return 1024;
 259    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 260       return 4;
 261    case PIPE_CAP_TEXTURE_GATHER_SM5:
 262       return 1;
 263    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 264       return -32;
 265    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 266       return 31;
 267    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 268    case PIPE_CAP_MAX_VERTEX_STREAMS:
 269       return 4;
 270    case PIPE_CAP_VENDOR_ID:
 271       return 0x8086;
 272    case PIPE_CAP_DEVICE_ID:
 273       return screen->pci_id;
 274    case PIPE_CAP_VIDEO_MEMORY:
 275       return 0xffffffff; // XXX: bogus
 276    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 277       return 2048;
 278    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 279       return 32;
 280    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 281       return 0;
 282    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 283       return 0;
 284    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 285    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 286    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 287    case PIPE_CAP_TGSI_TXQS:
 288    case PIPE_CAP_SHAREABLE_SHADERS:
 289    case PIPE_CAP_CLEAR_TEXTURE:
 290    case PIPE_CAP_DRAW_PARAMETERS:
 291    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 292    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 293    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 294    case PIPE_CAP_INVALIDATE_BUFFER:
 295    case PIPE_CAP_STRING_MARKER:
 296    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 297    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 298    case PIPE_CAP_QUERY_MEMORY_INFO:
 299    case PIPE_CAP_PCI_GROUP:
 300    case PIPE_CAP_PCI_BUS:
 301    case PIPE_CAP_PCI_DEVICE:
 302    case PIPE_CAP_PCI_FUNCTION:
 303    case PIPE_CAP_TGSI_VOTE:
 304    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 305    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 306    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 307    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 308    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 309    case PIPE_CAP_NATIVE_FENCE_FD:
 310    case PIPE_CAP_TGSI_FS_FBFETCH:
 311    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 312    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 313    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 314    case PIPE_CAP_MEMOBJ:
 315    case PIPE_CAP_LOAD_CONSTBUF:
 316    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 317    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 318    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 319       // XXX: TODO: fill these out
 320       break;
 321    }
 322    return 0;
 323 }
 324
 325 static float
 326 iris_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param)
 327 {
 328    switch (param) {
 329    case PIPE_CAPF_MAX_LINE_WIDTH:
 330    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 331       return 7.375f;
 332
 333    case PIPE_CAPF_MAX_POINT_WIDTH:
 334    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 335       return 255.0f;
 336
 337    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 338       return 16.0f;
 339    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 340       return 15.0f;
 341    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 342    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 343    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 344       return 0.0f;
 345    default:
 346       unreachable("unknown param");
 347    }
 348 }
 349
 350 static int
 351 iris_get_shader_param(struct pipe_screen *pscreen,
 352                       enum pipe_shader_type p_stage,
 353                       enum pipe_shader_cap param)
 354 {
 355    struct iris_screen *screen = (struct iris_screen *)pscreen;
 356    struct brw_compiler *compiler = screen->compiler;
 357    gl_shader_stage stage = stage_from_pipe(p_stage);
 358
 359    /* this is probably not totally correct.. but it's a start: */
 360    switch (param) {
 361    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 362       return stage == MESA_SHADER_FRAGMENT ? 1024 : 16384;
 363    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 364    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 365    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 366       return stage == MESA_SHADER_FRAGMENT ? 1024 : 0;
 367
 368    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 369       return UINT_MAX;
 370
 371    case PIPE_SHADER_CAP_MAX_INPUTS:
 372       return stage == MESA_SHADER_VERTEX ? 16 : 32;
 373    case PIPE_SHADER_CAP_MAX_OUTPUTS:
 374       return 32;
 375    case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 376       return 16 * 1024 * sizeof(float);
 377    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 378       return 16;
 379    case PIPE_SHADER_CAP_MAX_TEMPS:
 380       return 256; /* GL_MAX_PROGRAM_TEMPORARIES_ARB */
 381    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 382       return 0;
 383    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 384       return !compiler->glsl_compiler_options[stage].EmitNoIndirectInput;
 385    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 386       return !compiler->glsl_compiler_options[stage].EmitNoIndirectOutput;
 387    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 388       return !compiler->glsl_compiler_options[stage].EmitNoIndirectTemp;
 389    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 390       return 1;
 391    case PIPE_SHADER_CAP_SUBROUTINES:
 392       return 0;
 393    case PIPE_SHADER_CAP_INTEGERS:
 394    case PIPE_SHADER_CAP_SCALAR_ISA:
 395       return 1;
 396    case PIPE_SHADER_CAP_INT64_ATOMICS:
 397    case PIPE_SHADER_CAP_FP16:
 398       return 0;
 399    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 400    case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 401    case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
 402       return IRIS_MAX_TEXTURE_SAMPLERS;
 403    case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 404       return IRIS_MAX_ABOS + IRIS_MAX_SSBOS;
 405    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 406    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 407       return 0;
 408    case PIPE_SHADER_CAP_PREFERRED_IR:
 409       return PIPE_SHADER_IR_NIR;
 410    case PIPE_SHADER_CAP_SUPPORTED_IRS:
 411       return 0;
 412    case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 413       return 32;
 414    case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 415    case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 416    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 417    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 418    case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
 419    case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 420    case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 421    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 422       return 0;
 423    default:
 424       unreachable("unknown shader param");
 425    }
 426 }
 427
 428 static int
 429 iris_get_compute_param(struct pipe_screen *pscreen,
 430                        enum pipe_shader_ir ir_type,
 431                        enum pipe_compute_cap param,
 432                        void *ret)
 433 {
 434    /* TODO: compute shaders */
 435    return 0;
 436 }
 437
 438 static uint64_t
 439 iris_get_timestamp(struct pipe_screen *pscreen)
 440 {
 441    return 0;
 442 }
 443
 444 static void
 445 iris_destroy_screen(struct pipe_screen *pscreen)
 446 {
 447    struct iris_screen *screen = (struct iris_screen *) pscreen;
 448    iris_bo_unreference(screen->workaround_bo);
 449    ralloc_free(screen);
 450 }
 451
 452 static void
 453 iris_fence_reference(struct pipe_screen *screen,
 454                      struct pipe_fence_handle **ptr,
 455                      struct pipe_fence_handle *fence)
 456 {
 457 }
 458
 459 static boolean
 460 iris_fence_finish(struct pipe_screen *screen,
 461                   struct pipe_context *ctx,
 462                   struct pipe_fence_handle *fence,
 463                   uint64_t timeout)
 464 {
 465    return true;
 466 }
 467
 468 static void
 469 iris_query_memory_info(struct pipe_screen *pscreen,
 470                        struct pipe_memory_info *info)
 471 {
 472 }
 473
 474 static const void *
 475 iris_get_compiler_options(struct pipe_screen *pscreen,
 476                           enum pipe_shader_ir ir,
 477                           enum pipe_shader_type pstage)
 478 {
 479    struct iris_screen *screen = (struct iris_screen *) pscreen;
 480    gl_shader_stage stage = stage_from_pipe(pstage);
 481    assert(ir == PIPE_SHADER_IR_NIR);
 482
 483    return screen->compiler->glsl_compiler_options[stage].NirOptions;
 484 }
 485
 486 static int
 487 iris_getparam(struct iris_screen *screen, int param, int *value)
 488 {
 489    struct drm_i915_getparam gp = { .param = param, .value = value };
 490
 491    if (ioctl(screen->fd, DRM_IOCTL_I915_GETPARAM, &gp) == -1)
 492       return -errno;
 493
 494    return 0;
 495 }
 496
 497 static bool
 498 iris_getparam_boolean(struct iris_screen *screen, int param)
 499 {
 500    int value = 0;
 501    return (iris_getparam(screen, param, &value) == 0) && value;
 502 }
 503
 504 static int
 505 iris_getparam_integer(struct iris_screen *screen, int param)
 506 {
 507    int value = -1;
 508
 509    if (iris_getparam(screen, param, &value) == 0)
 510       return value;
 511
 512    return -1;
 513 }
 514
 515 static void
 516 iris_shader_debug_log(void *data, const char *fmt, ...)
 517 {
 518    struct pipe_debug_callback *dbg = data;
 519    unsigned id = 0;
 520    va_list args;
 521
 522    if (!dbg->debug_message)
 523       return;
 524
 525    va_start(args, fmt);
 526    dbg->debug_message(dbg->data, &id, PIPE_DEBUG_TYPE_SHADER_INFO, fmt, args);
 527    va_end(args);
 528 }
 529
 530 static void
 531 iris_shader_perf_log(void *data, const char *fmt, ...)
 532 {
 533    struct pipe_debug_callback *dbg = data;
 534    unsigned id = 0;
 535    va_list args;
 536
 537    if (!dbg->debug_message)
 538       return;
 539
 540    va_start(args, fmt);
 541    dbg->debug_message(dbg->data, &id, PIPE_DEBUG_TYPE_PERF_INFO, fmt, args);
 542    va_end(args);
 543 }
 544
 545 struct pipe_screen *
 546 iris_screen_create(int fd)
 547 {
 548    struct iris_screen *screen = rzalloc(NULL, struct iris_screen);
 549    if (!screen)
 550       return NULL;
 551
 552    screen->fd = fd;
 553    screen->pci_id = iris_getparam_integer(screen, I915_PARAM_CHIPSET_ID);
 554
 555    if (!gen_get_device_info(screen->pci_id, &screen->devinfo))
 556       return NULL;
 557
 558    screen->bufmgr = iris_bufmgr_init(&screen->devinfo, fd);
 559    if (!screen->bufmgr)
 560       return NULL;
 561
 562    screen->workaround_bo =
 563       iris_bo_alloc(screen->bufmgr, "workaround", 4096, IRIS_MEMZONE_OTHER);
 564    if (!screen->workaround_bo)
 565       return NULL;
 566
 567    brw_process_intel_debug_variable();
 568
 569    bool hw_has_swizzling = false; // XXX: detect?
 570    isl_device_init(&screen->isl_dev, &screen->devinfo, hw_has_swizzling);
 571
 572    screen->compiler = brw_compiler_create(screen, &screen->devinfo);
 573    screen->compiler->shader_debug_log = iris_shader_debug_log;
 574    screen->compiler->shader_perf_log = iris_shader_perf_log;
 575
 576    slab_create_parent(&screen->transfer_pool,
 577                       sizeof(struct iris_transfer), 64);
 578
 579    struct pipe_screen *pscreen = &screen->base;
 580
 581    iris_init_screen_resource_functions(pscreen);
 582
 583    pscreen->destroy = iris_destroy_screen;
 584    pscreen->get_name = iris_get_name;
 585    pscreen->get_vendor = iris_get_vendor;
 586    pscreen->get_device_vendor = iris_get_device_vendor;
 587    pscreen->get_param = iris_get_param;
 588    pscreen->get_shader_param = iris_get_shader_param;
 589    pscreen->get_compute_param = iris_get_compute_param;
 590    pscreen->get_paramf = iris_get_paramf;
 591    pscreen->get_compiler_options = iris_get_compiler_options;
 592    pscreen->is_format_supported = iris_is_format_supported;
 593    pscreen->context_create = iris_create_context;
 594    pscreen->flush_frontbuffer = iris_flush_frontbuffer;
 595    pscreen->get_timestamp = iris_get_timestamp;
 596    pscreen->fence_reference = iris_fence_reference;
 597    pscreen->fence_finish = iris_fence_finish;
 598    pscreen->query_memory_info = iris_query_memory_info;
 599
 600    return pscreen;
 601 }