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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 /**
  24  * @file iris_screen.c
  25  *
  26  * Screen related driver hooks and capability lists.
  27  *
  28  * A program may use multiple rendering contexts (iris_context), but
  29  * they all share a common screen (iris_screen).  Global driver state
  30  * can be stored in the screen; it may be accessed by multiple threads.
  31  */
  32
  33 #include <stdio.h>
  34 #include <errno.h>
  35 #include <sys/ioctl.h>
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_state.h"
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_screen.h"
  40 #include "util/u_inlines.h"
  41 #include "util/u_format.h"
  42 #include "util/u_upload_mgr.h"
  43 #include "util/ralloc.h"
  44 #include "drm-uapi/i915_drm.h"
  45 #include "iris_context.h"
  46 #include "iris_pipe.h"
  47 #include "iris_resource.h"
  48 #include "iris_screen.h"
  49 #include "intel/compiler/brw_compiler.h"
  50
  51 static void
  52 iris_flush_frontbuffer(struct pipe_screen *_screen,
  53                        struct pipe_resource *resource,
  54                        unsigned level, unsigned layer,
  55                        void *context_private, struct pipe_box *box)
  56 {
  57 }
  58
  59 static const char *
  60 iris_get_vendor(struct pipe_screen *pscreen)
  61 {
  62    return "Mesa Project";
  63 }
  64
  65 static const char *
  66 iris_get_device_vendor(struct pipe_screen *pscreen)
  67 {
  68    return "Intel";
  69 }
  70
  71 static const char *
  72 iris_get_name(struct pipe_screen *pscreen)
  73 {
  74    struct iris_screen *screen = (struct iris_screen *)pscreen;
  75    const char *chipset;
  76
  77    switch (screen->pci_id) {
  78 #undef CHIPSET
  79 #define CHIPSET(id, symbol, str) case id: chipset = str; break;
  80 #include "pci_ids/i965_pci_ids.h"
  81    default:
  82       chipset = "Unknown Intel Chipset";
  83       break;
  84    }
  85    return &chipset[9];
  86 }
  87
  88 static int
  89 iris_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
  90 {
  91    struct iris_screen *screen = (struct iris_screen *)pscreen;
  92    const struct gen_device_info *devinfo = &screen->devinfo;
  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    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 165    case PIPE_CAP_CLEAR_TEXTURE:
 166       return true;
 167
 168    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 169    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 170    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 171    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 172    case PIPE_CAP_USER_VERTEX_BUFFERS:
 173    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 174    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 175    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 176    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 177    case PIPE_CAP_FAKE_SW_MSAA:
 178    case PIPE_CAP_VERTEXID_NOBASE:
 179    case PIPE_CAP_FENCE_SIGNAL:
 180    case PIPE_CAP_CONSTBUF0_FLAGS:
 181    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 182    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 183    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 184    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 185    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 186    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 187    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 188    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 189    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 190    case PIPE_CAP_GENERATE_MIPMAP:
 191    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 192    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 193    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 194    case PIPE_CAP_TILE_RASTER_ORDER:
 195    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 196    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 197    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 198    case PIPE_CAP_BINDLESS_TEXTURE:
 199    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 200       return false;
 201
 202    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 203       /* Intel GPUs don't support PIPE_TEX_WRAP_MIRROR_CLAMP or
 204        * PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER.
 205        */
 206       return false;
 207
 208    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 209       return 1;
 210    case PIPE_CAP_MAX_RENDER_TARGETS:
 211       return BRW_MAX_DRAW_BUFFERS;
 212    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 213    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 214       return 15; /* 16384x16384 */
 215    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 216       return 12; /* 2048x2048 */
 217    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 218       return 4;
 219    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 220       return 2048;
 221    case PIPE_CAP_MIN_TEXEL_OFFSET:
 222       return -8;
 223    case PIPE_CAP_MAX_TEXEL_OFFSET:
 224       return 7;
 225    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 226       return BRW_MAX_SOL_BINDINGS / IRIS_MAX_SOL_BUFFERS;
 227    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 228       return BRW_MAX_SOL_BINDINGS;
 229    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 230       return 460;
 231    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 232       return 140;
 233    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 234       /* 3DSTATE_CONSTANT_XS requires the start of UBOs to be 32B aligned */
 235       return 32;
 236    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 237       /* Choose a cacheline (64 bytes) so that we can safely have the CPU and
 238        * GPU writing the same SSBO on non-coherent systems (Atom CPUs).  With
 239        * UBOs, the GPU never writes, so there's no problem.  For an SSBO, the
 240        * GPU and the CPU can be updating disjoint regions of the buffer
 241        * simultaneously and that will break if the regions overlap the same
 242        * cacheline.
 243        */
 244       return 64;
 245    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 246       return 64; // XXX: ?
 247    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 248       return 16;
 249    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 250       return true; // XXX: ?????
 251    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 252       return 1 << 27; /* 128MB */
 253    case PIPE_CAP_MAX_VIEWPORTS:
 254       return 16;
 255    case PIPE_CAP_ENDIANNESS:
 256       return PIPE_ENDIAN_LITTLE;
 257    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 258       return 256;
 259    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 260       return 1024;
 261    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 262       return 4;
 263    case PIPE_CAP_TEXTURE_GATHER_SM5:
 264       return 1;
 265    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 266       return -32;
 267    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 268       return 31;
 269    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 270    case PIPE_CAP_MAX_VERTEX_STREAMS:
 271       return 4;
 272    case PIPE_CAP_VENDOR_ID:
 273       return 0x8086;
 274    case PIPE_CAP_DEVICE_ID:
 275       return screen->pci_id;
 276    case PIPE_CAP_VIDEO_MEMORY:
 277       return 0xffffffff; // XXX: bogus
 278    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 279       return 2048;
 280    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 281       return 32;
 282    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 283       return 0;
 284    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 285       return 0;
 286    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 287       /* AMD_pinned_memory assumes the flexibility of using client memory
 288        * for any buffer (incl. vertex buffers) which rules out the prospect
 289        * of using snooped buffers, as using snooped buffers without
 290        * cogniscience is likely to be detrimental to performance and require
 291        * extensive checking in the driver for correctness, e.g. to prevent
 292        * illegal snoop <-> snoop transfers.
 293        */
 294       return devinfo->has_llc;
 295    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 296    case PIPE_CAP_TGSI_TXQS:
 297    case PIPE_CAP_SHAREABLE_SHADERS:
 298    case PIPE_CAP_DRAW_PARAMETERS:
 299    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 300    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 301    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 302    case PIPE_CAP_INVALIDATE_BUFFER:
 303    case PIPE_CAP_STRING_MARKER:
 304    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 305    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 306    case PIPE_CAP_QUERY_MEMORY_INFO:
 307    case PIPE_CAP_PCI_GROUP:
 308    case PIPE_CAP_PCI_BUS:
 309    case PIPE_CAP_PCI_DEVICE:
 310    case PIPE_CAP_PCI_FUNCTION:
 311    case PIPE_CAP_TGSI_VOTE:
 312    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 313    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 314    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 315    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 316    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 317    case PIPE_CAP_NATIVE_FENCE_FD:
 318    case PIPE_CAP_TGSI_FS_FBFETCH:
 319    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 320    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 321    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 322    case PIPE_CAP_MEMOBJ:
 323    case PIPE_CAP_LOAD_CONSTBUF:
 324    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 325    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 326    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 327       // XXX: TODO: fill these out
 328       break;
 329    }
 330    return 0;
 331 }
 332
 333 static float
 334 iris_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param)
 335 {
 336    switch (param) {
 337    case PIPE_CAPF_MAX_LINE_WIDTH:
 338    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 339       return 7.375f;
 340
 341    case PIPE_CAPF_MAX_POINT_WIDTH:
 342    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 343       return 255.0f;
 344
 345    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 346       return 16.0f;
 347    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 348       return 15.0f;
 349    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 350    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 351    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 352       return 0.0f;
 353    default:
 354       unreachable("unknown param");
 355    }
 356 }
 357
 358 static int
 359 iris_get_shader_param(struct pipe_screen *pscreen,
 360                       enum pipe_shader_type p_stage,
 361                       enum pipe_shader_cap param)
 362 {
 363    struct iris_screen *screen = (struct iris_screen *)pscreen;
 364    struct brw_compiler *compiler = screen->compiler;
 365    gl_shader_stage stage = stage_from_pipe(p_stage);
 366
 367    /* this is probably not totally correct.. but it's a start: */
 368    switch (param) {
 369    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 370       return stage == MESA_SHADER_FRAGMENT ? 1024 : 16384;
 371    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 372    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 373    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 374       return stage == MESA_SHADER_FRAGMENT ? 1024 : 0;
 375
 376    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 377       return UINT_MAX;
 378
 379    case PIPE_SHADER_CAP_MAX_INPUTS:
 380       return stage == MESA_SHADER_VERTEX ? 16 : 32;
 381    case PIPE_SHADER_CAP_MAX_OUTPUTS:
 382       return 32;
 383    case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 384       return 16 * 1024 * sizeof(float);
 385    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 386       return 16;
 387    case PIPE_SHADER_CAP_MAX_TEMPS:
 388       return 256; /* GL_MAX_PROGRAM_TEMPORARIES_ARB */
 389    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 390       return 0;
 391    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 392       return !compiler->glsl_compiler_options[stage].EmitNoIndirectInput;
 393    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 394       return !compiler->glsl_compiler_options[stage].EmitNoIndirectOutput;
 395    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 396       return !compiler->glsl_compiler_options[stage].EmitNoIndirectTemp;
 397    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 398       return 1;
 399    case PIPE_SHADER_CAP_SUBROUTINES:
 400       return 0;
 401    case PIPE_SHADER_CAP_INTEGERS:
 402    case PIPE_SHADER_CAP_SCALAR_ISA:
 403       return 1;
 404    case PIPE_SHADER_CAP_INT64_ATOMICS:
 405    case PIPE_SHADER_CAP_FP16:
 406       return 0;
 407    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 408    case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 409    case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
 410       return IRIS_MAX_TEXTURE_SAMPLERS;
 411    case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 412       return IRIS_MAX_ABOS + IRIS_MAX_SSBOS;
 413    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 414    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 415       return 0;
 416    case PIPE_SHADER_CAP_PREFERRED_IR:
 417       return PIPE_SHADER_IR_NIR;
 418    case PIPE_SHADER_CAP_SUPPORTED_IRS:
 419       return 0;
 420    case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 421       return 32;
 422    case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 423    case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 424    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 425    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 426    case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
 427    case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 428    case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 429    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 430       return 0;
 431    default:
 432       unreachable("unknown shader param");
 433    }
 434 }
 435
 436 static int
 437 iris_get_compute_param(struct pipe_screen *pscreen,
 438                        enum pipe_shader_ir ir_type,
 439                        enum pipe_compute_cap param,
 440                        void *ret)
 441 {
 442    /* TODO: compute shaders */
 443    return 0;
 444 }
 445
 446 static uint64_t
 447 iris_get_timestamp(struct pipe_screen *pscreen)
 448 {
 449    return 0;
 450 }
 451
 452 static void
 453 iris_destroy_screen(struct pipe_screen *pscreen)
 454 {
 455    struct iris_screen *screen = (struct iris_screen *) pscreen;
 456    iris_bo_unreference(screen->workaround_bo);
 457    ralloc_free(screen);
 458 }
 459
 460 static void
 461 iris_fence_reference(struct pipe_screen *screen,
 462                      struct pipe_fence_handle **ptr,
 463                      struct pipe_fence_handle *fence)
 464 {
 465 }
 466
 467 static boolean
 468 iris_fence_finish(struct pipe_screen *screen,
 469                   struct pipe_context *ctx,
 470                   struct pipe_fence_handle *fence,
 471                   uint64_t timeout)
 472 {
 473    return true;
 474 }
 475
 476 static void
 477 iris_query_memory_info(struct pipe_screen *pscreen,
 478                        struct pipe_memory_info *info)
 479 {
 480 }
 481
 482 static const void *
 483 iris_get_compiler_options(struct pipe_screen *pscreen,
 484                           enum pipe_shader_ir ir,
 485                           enum pipe_shader_type pstage)
 486 {
 487    struct iris_screen *screen = (struct iris_screen *) pscreen;
 488    gl_shader_stage stage = stage_from_pipe(pstage);
 489    assert(ir == PIPE_SHADER_IR_NIR);
 490
 491    return screen->compiler->glsl_compiler_options[stage].NirOptions;
 492 }
 493
 494 static int
 495 iris_getparam(struct iris_screen *screen, int param, int *value)
 496 {
 497    struct drm_i915_getparam gp = { .param = param, .value = value };
 498
 499    if (ioctl(screen->fd, DRM_IOCTL_I915_GETPARAM, &gp) == -1)
 500       return -errno;
 501
 502    return 0;
 503 }
 504
 505 static bool
 506 iris_getparam_boolean(struct iris_screen *screen, int param)
 507 {
 508    int value = 0;
 509    return (iris_getparam(screen, param, &value) == 0) && value;
 510 }
 511
 512 static int
 513 iris_getparam_integer(struct iris_screen *screen, int param)
 514 {
 515    int value = -1;
 516
 517    if (iris_getparam(screen, param, &value) == 0)
 518       return value;
 519
 520    return -1;
 521 }
 522
 523 static void
 524 iris_shader_debug_log(void *data, const char *fmt, ...)
 525 {
 526    struct pipe_debug_callback *dbg = data;
 527    unsigned id = 0;
 528    va_list args;
 529
 530    if (!dbg->debug_message)
 531       return;
 532
 533    va_start(args, fmt);
 534    dbg->debug_message(dbg->data, &id, PIPE_DEBUG_TYPE_SHADER_INFO, fmt, args);
 535    va_end(args);
 536 }
 537
 538 static void
 539 iris_shader_perf_log(void *data, const char *fmt, ...)
 540 {
 541    struct pipe_debug_callback *dbg = data;
 542    unsigned id = 0;
 543    va_list args;
 544
 545    if (!dbg->debug_message)
 546       return;
 547
 548    va_start(args, fmt);
 549    dbg->debug_message(dbg->data, &id, PIPE_DEBUG_TYPE_PERF_INFO, fmt, args);
 550    va_end(args);
 551 }
 552
 553 struct pipe_screen *
 554 iris_screen_create(int fd)
 555 {
 556    struct iris_screen *screen = rzalloc(NULL, struct iris_screen);
 557    if (!screen)
 558       return NULL;
 559
 560    screen->fd = fd;
 561    screen->pci_id = iris_getparam_integer(screen, I915_PARAM_CHIPSET_ID);
 562
 563    if (!gen_get_device_info(screen->pci_id, &screen->devinfo))
 564       return NULL;
 565
 566    screen->bufmgr = iris_bufmgr_init(&screen->devinfo, fd);
 567    if (!screen->bufmgr)
 568       return NULL;
 569
 570    screen->workaround_bo =
 571       iris_bo_alloc(screen->bufmgr, "workaround", 4096, IRIS_MEMZONE_OTHER);
 572    if (!screen->workaround_bo)
 573       return NULL;
 574
 575    brw_process_intel_debug_variable();
 576
 577    bool hw_has_swizzling = false; // XXX: detect?
 578    isl_device_init(&screen->isl_dev, &screen->devinfo, hw_has_swizzling);
 579
 580    screen->compiler = brw_compiler_create(screen, &screen->devinfo);
 581    screen->compiler->shader_debug_log = iris_shader_debug_log;
 582    screen->compiler->shader_perf_log = iris_shader_perf_log;
 583
 584    slab_create_parent(&screen->transfer_pool,
 585                       sizeof(struct iris_transfer), 64);
 586
 587    struct pipe_screen *pscreen = &screen->base;
 588
 589    iris_init_screen_resource_functions(pscreen);
 590
 591    pscreen->destroy = iris_destroy_screen;
 592    pscreen->get_name = iris_get_name;
 593    pscreen->get_vendor = iris_get_vendor;
 594    pscreen->get_device_vendor = iris_get_device_vendor;
 595    pscreen->get_param = iris_get_param;
 596    pscreen->get_shader_param = iris_get_shader_param;
 597    pscreen->get_compute_param = iris_get_compute_param;
 598    pscreen->get_paramf = iris_get_paramf;
 599    pscreen->get_compiler_options = iris_get_compiler_options;
 600    pscreen->is_format_supported = iris_is_format_supported;
 601    pscreen->context_create = iris_create_context;
 602    pscreen->flush_frontbuffer = iris_flush_frontbuffer;
 603    pscreen->get_timestamp = iris_get_timestamp;
 604    pscreen->fence_reference = iris_fence_reference;
 605    pscreen->fence_finish = iris_fence_finish;
 606    pscreen->query_memory_info = iris_query_memory_info;
 607
 608    return pscreen;
 609 }