src/gallium/drivers/radeonsi/si_shader.h

   1 /*
   2  * Copyright 2012 Advanced Micro Devices, Inc.
   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 /* The compiler middle-end architecture: Explaining (non-)monolithic shaders
  25  * -------------------------------------------------------------------------
  26  *
  27  * Typically, there is one-to-one correspondence between API and HW shaders,
  28  * that is, for every API shader, there is exactly one shader binary in
  29  * the driver.
  30  *
  31  * The problem with that is that we also have to emulate some API states
  32  * (e.g. alpha-test, and many others) in shaders too. The two obvious ways
  33  * to deal with it are:
  34  * - each shader has multiple variants for each combination of emulated states,
  35  *   and the variants are compiled on demand, possibly relying on a shader
  36  *   cache for good performance
  37  * - patch shaders at the binary level
  38  *
  39  * This driver uses something completely different. The emulated states are
  40  * usually implemented at the beginning or end of shaders. Therefore, we can
  41  * split the shader into 3 parts:
  42  * - prolog part (shader code dependent on states)
  43  * - main part (the API shader)
  44  * - epilog part (shader code dependent on states)
  45  *
  46  * Each part is compiled as a separate shader and the final binaries are
  47  * concatenated. This type of shader is called non-monolithic, because it
  48  * consists of multiple independent binaries. Creating a new shader variant
  49  * is therefore only a concatenation of shader parts (binaries) and doesn't
  50  * involve any compilation. The main shader parts are the only parts that are
  51  * compiled when applications create shader objects. The prolog and epilog
  52  * parts are compiled on the first use and saved, so that their binaries can
  53  * be reused by many other shaders.
  54  *
  55  * One of the roles of the prolog part is to compute vertex buffer addresses
  56  * for vertex shaders. A few of the roles of the epilog part are color buffer
  57  * format conversions in pixel shaders that we have to do manually, and write
  58  * tessellation factors in tessellation control shaders. The prolog and epilog
  59  * have many other important responsibilities in various shader stages.
  60  * They don't just "emulate legacy stuff".
  61  *
  62  * Monolithic shaders are shaders where the parts are combined before LLVM
  63  * compilation, and the whole thing is compiled and optimized as one unit with
  64  * one binary on the output. The result is the same as the non-monolithic
  65  * shader, but the final code can be better, because LLVM can optimize across
  66  * all shader parts. Monolithic shaders aren't usually used except for these
  67  * special cases:
  68  *
  69  * 1) Some rarely-used states require modification of the main shader part
  70  *    itself, and in such cases, only the monolithic shader variant is
  71  *    compiled, and that's always done on the first use.
  72  *
  73  * 2) When we do cross-stage optimizations for separate shader objects and
  74  *    e.g. eliminate unused shader varyings, the resulting optimized shader
  75  *    variants are always compiled as monolithic shaders, and always
  76  *    asynchronously (i.e. not stalling ongoing rendering). We call them
  77  *    "optimized monolithic" shaders. The important property here is that
  78  *    the non-monolithic unoptimized shader variant is always available for use
  79  *    when the asynchronous compilation of the optimized shader is not done
  80  *    yet.
  81  *
  82  * Starting with GFX9 chips, some shader stages are merged, and the number of
  83  * shader parts per shader increased. The complete new list of shader parts is:
  84  * - 1st shader: prolog part
  85  * - 1st shader: main part
  86  * - 2nd shader: prolog part
  87  * - 2nd shader: main part
  88  * - 2nd shader: epilog part
  89  */
  90
  91 /* How linking shader inputs and outputs between vertex, tessellation, and
  92  * geometry shaders works.
  93  *
  94  * Inputs and outputs between shaders are stored in a buffer. This buffer
  95  * lives in LDS (typical case for tessellation), but it can also live
  96  * in memory (ESGS). Each input or output has a fixed location within a vertex.
  97  * The highest used input or output determines the stride between vertices.
  98  *
  99  * Since GS and tessellation are only possible in the OpenGL core profile,
 100  * only these semantics are valid for per-vertex data:
 101  *
 102  *   Name             Location
 103  *
 104  *   POSITION         0
 105  *   PSIZE            1
 106  *   CLIPDIST0..1     2..3
 107  *   CULLDIST0..1     (not implemented)
 108  *   GENERIC0..31     4..35
 109  *
 110  * For example, a shader only writing GENERIC0 has the output stride of 5.
 111  *
 112  * Only these semantics are valid for per-patch data:
 113  *
 114  *   Name             Location
 115  *
 116  *   TESSOUTER        0
 117  *   TESSINNER        1
 118  *   PATCH0..29       2..31
 119  *
 120  * That's how independent shaders agree on input and output locations.
 121  * The si_shader_io_get_unique_index function assigns the locations.
 122  *
 123  * For tessellation, other required information for calculating the input and
 124  * output addresses like the vertex stride, the patch stride, and the offsets
 125  * where per-vertex and per-patch data start, is passed to the shader via
 126  * user data SGPRs. The offsets and strides are calculated at draw time and
 127  * aren't available at compile time.
 128  */
 129
 130 #ifndef SI_SHADER_H
 131 #define SI_SHADER_H
 132
 133 #include <llvm-c/Core.h> /* LLVMModuleRef */
 134 #include <llvm-c/TargetMachine.h>
 135 #include "tgsi/tgsi_scan.h"
 136 #include "util/u_queue.h"
 137
 138 #include "ac_binary.h"
 139 #include "ac_llvm_build.h"
 140 #include "si_state.h"
 141
 142 struct nir_shader;
 143
 144 #define SI_MAX_VS_OUTPUTS       40
 145
 146 /* Shader IO unique indices are supported for TGSI_SEMANTIC_GENERIC with an
 147  * index smaller than this.
 148  */
 149 #define SI_MAX_IO_GENERIC       46
 150
 151 /* SGPR user data indices */
 152 enum {
 153         SI_SGPR_RW_BUFFERS,  /* rings (& stream-out, VS only) */
 154 #if !HAVE_32BIT_POINTERS
 155         SI_SGPR_RW_BUFFERS_HI,
 156 #endif
 157         SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES,
 158 #if !HAVE_32BIT_POINTERS
 159         SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES_HI,
 160 #endif
 161         SI_SGPR_CONST_AND_SHADER_BUFFERS, /* or just a constant buffer 0 pointer */
 162 #if !HAVE_32BIT_POINTERS
 163         SI_SGPR_CONST_AND_SHADER_BUFFERS_HI,
 164 #endif
 165         SI_SGPR_SAMPLERS_AND_IMAGES,
 166 #if !HAVE_32BIT_POINTERS
 167         SI_SGPR_SAMPLERS_AND_IMAGES_HI,
 168 #endif
 169         SI_NUM_RESOURCE_SGPRS,
 170
 171         /* all VS variants */
 172         SI_SGPR_BASE_VERTEX = SI_NUM_RESOURCE_SGPRS,
 173         SI_SGPR_START_INSTANCE,
 174         SI_SGPR_DRAWID,
 175         SI_SGPR_VS_STATE_BITS,
 176         SI_VS_NUM_USER_SGPR,
 177
 178         SI_SGPR_VS_BLIT_DATA = SI_SGPR_CONST_AND_SHADER_BUFFERS,
 179
 180         /* TES */
 181         SI_SGPR_TES_OFFCHIP_LAYOUT = SI_NUM_RESOURCE_SGPRS,
 182         SI_SGPR_TES_OFFCHIP_ADDR,
 183         SI_TES_NUM_USER_SGPR,
 184
 185         /* GFX6-8: TCS only */
 186         GFX6_SGPR_TCS_OFFCHIP_LAYOUT = SI_NUM_RESOURCE_SGPRS,
 187         GFX6_SGPR_TCS_OUT_OFFSETS,
 188         GFX6_SGPR_TCS_OUT_LAYOUT,
 189         GFX6_SGPR_TCS_IN_LAYOUT,
 190         GFX6_TCS_NUM_USER_SGPR,
 191
 192         /* GFX9: Merged shaders. */
 193 #if HAVE_32BIT_POINTERS
 194         /* 2ND_CONST_AND_SHADER_BUFFERS is set in USER_DATA_ADDR_LO (SGPR0). */
 195         /* 2ND_SAMPLERS_AND_IMAGES is set in USER_DATA_ADDR_HI (SGPR1). */
 196         GFX9_MERGED_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,
 197 #else
 198         /* 2ND_CONST_AND_SHADER_BUFFERS is set in USER_DATA_ADDR_LO/HI (SGPR[0:1]). */
 199         GFX9_SGPR_2ND_SAMPLERS_AND_IMAGES = SI_VS_NUM_USER_SGPR,
 200         GFX9_SGPR_2ND_SAMPLERS_AND_IMAGES_HI,
 201         GFX9_MERGED_NUM_USER_SGPR,
 202 #endif
 203
 204         /* GFX9: Merged LS-HS (VS-TCS) only. */
 205         GFX9_SGPR_TCS_OFFCHIP_LAYOUT = GFX9_MERGED_NUM_USER_SGPR,
 206         GFX9_SGPR_TCS_OUT_OFFSETS,
 207         GFX9_SGPR_TCS_OUT_LAYOUT,
 208 #if !HAVE_32BIT_POINTERS
 209         GFX9_SGPR_align_for_vb_pointer,
 210 #endif
 211         GFX9_TCS_NUM_USER_SGPR,
 212
 213         /* GS limits */
 214         GFX6_GS_NUM_USER_SGPR = SI_NUM_RESOURCE_SGPRS,
 215 #if HAVE_32BIT_POINTERS
 216         GFX9_VSGS_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,
 217         GFX9_TESGS_NUM_USER_SGPR = SI_TES_NUM_USER_SGPR,
 218 #else
 219         GFX9_VSGS_NUM_USER_SGPR = GFX9_MERGED_NUM_USER_SGPR,
 220         GFX9_TESGS_NUM_USER_SGPR = GFX9_MERGED_NUM_USER_SGPR,
 221 #endif
 222         SI_GSCOPY_NUM_USER_SGPR = SI_SGPR_RW_BUFFERS + (HAVE_32BIT_POINTERS ? 1 : 2),
 223
 224         /* PS only */
 225         SI_SGPR_ALPHA_REF       = SI_NUM_RESOURCE_SGPRS,
 226         SI_PS_NUM_USER_SGPR,
 227 };
 228
 229 /* LLVM function parameter indices */
 230 enum {
 231         SI_NUM_RESOURCE_PARAMS = 4,
 232
 233         /* PS only parameters */
 234         SI_PARAM_ALPHA_REF = SI_NUM_RESOURCE_PARAMS,
 235         SI_PARAM_PRIM_MASK,
 236         SI_PARAM_PERSP_SAMPLE,
 237         SI_PARAM_PERSP_CENTER,
 238         SI_PARAM_PERSP_CENTROID,
 239         SI_PARAM_PERSP_PULL_MODEL,
 240         SI_PARAM_LINEAR_SAMPLE,
 241         SI_PARAM_LINEAR_CENTER,
 242         SI_PARAM_LINEAR_CENTROID,
 243         SI_PARAM_LINE_STIPPLE_TEX,
 244         SI_PARAM_POS_X_FLOAT,
 245         SI_PARAM_POS_Y_FLOAT,
 246         SI_PARAM_POS_Z_FLOAT,
 247         SI_PARAM_POS_W_FLOAT,
 248         SI_PARAM_FRONT_FACE,
 249         SI_PARAM_ANCILLARY,
 250         SI_PARAM_SAMPLE_COVERAGE,
 251         SI_PARAM_POS_FIXED_PT,
 252
 253         SI_NUM_PARAMS = SI_PARAM_POS_FIXED_PT + 9, /* +8 for COLOR[0..1] */
 254 };
 255
 256 /* Fields of driver-defined VS state SGPR. */
 257 /* Clamp vertex color output (only used in VS as VS). */
 258 #define S_VS_STATE_CLAMP_VERTEX_COLOR(x)        (((unsigned)(x) & 0x1) << 0)
 259 #define C_VS_STATE_CLAMP_VERTEX_COLOR           0xFFFFFFFE
 260 #define S_VS_STATE_INDEXED(x)                   (((unsigned)(x) & 0x1) << 1)
 261 #define C_VS_STATE_INDEXED                      0xFFFFFFFD
 262 #define S_VS_STATE_LS_OUT_PATCH_SIZE(x)         (((unsigned)(x) & 0x1FFF) << 8)
 263 #define C_VS_STATE_LS_OUT_PATCH_SIZE            0xFFE000FF
 264 #define S_VS_STATE_LS_OUT_VERTEX_SIZE(x)        (((unsigned)(x) & 0xFF) << 24)
 265 #define C_VS_STATE_LS_OUT_VERTEX_SIZE           0x00FFFFFF
 266
 267 /* SI-specific system values. */
 268 enum {
 269         TGSI_SEMANTIC_DEFAULT_TESSOUTER_SI = TGSI_SEMANTIC_COUNT,
 270         TGSI_SEMANTIC_DEFAULT_TESSINNER_SI,
 271 };
 272
 273 enum {
 274         /* Use a property enum that VS wouldn't use. */
 275         TGSI_PROPERTY_VS_BLIT_SGPRS = TGSI_PROPERTY_FS_COORD_ORIGIN,
 276
 277         /* These represent the number of SGPRs the shader uses. */
 278         SI_VS_BLIT_SGPRS_POS = 3,
 279         SI_VS_BLIT_SGPRS_POS_COLOR = 7,
 280         SI_VS_BLIT_SGPRS_POS_TEXCOORD = 9,
 281 };
 282
 283 /* For VS shader key fix_fetch. */
 284 enum {
 285         SI_FIX_FETCH_NONE = 0,
 286         SI_FIX_FETCH_A2_SNORM,
 287         SI_FIX_FETCH_A2_SSCALED,
 288         SI_FIX_FETCH_A2_SINT,
 289         SI_FIX_FETCH_RGBA_32_UNORM,
 290         SI_FIX_FETCH_RGBX_32_UNORM,
 291         SI_FIX_FETCH_RGBA_32_SNORM,
 292         SI_FIX_FETCH_RGBX_32_SNORM,
 293         SI_FIX_FETCH_RGBA_32_USCALED,
 294         SI_FIX_FETCH_RGBA_32_SSCALED,
 295         SI_FIX_FETCH_RGBA_32_FIXED,
 296         SI_FIX_FETCH_RGBX_32_FIXED,
 297         SI_FIX_FETCH_RG_64_FLOAT,
 298         SI_FIX_FETCH_RGB_64_FLOAT,
 299         SI_FIX_FETCH_RGBA_64_FLOAT,
 300         SI_FIX_FETCH_RGB_8,     /* A = 1.0 */
 301         SI_FIX_FETCH_RGB_8_INT, /* A = 1 */
 302         SI_FIX_FETCH_RGB_16,
 303         SI_FIX_FETCH_RGB_16_INT,
 304 };
 305
 306 struct si_shader;
 307
 308 /* State of the context creating the shader object. */
 309 struct si_compiler_ctx_state {
 310         /* Should only be used by si_init_shader_selector_async and
 311          * si_build_shader_variant if thread_index == -1 (non-threaded). */
 312         LLVMTargetMachineRef            tm;
 313
 314         /* Used if thread_index == -1 or if debug.async is true. */
 315         struct pipe_debug_callback      debug;
 316
 317         /* Used for creating the log string for gallium/ddebug. */
 318         bool                            is_debug_context;
 319 };
 320
 321 /* A shader selector is a gallium CSO and contains shader variants and
 322  * binaries for one TGSI program. This can be shared by multiple contexts.
 323  */
 324 struct si_shader_selector {
 325         struct pipe_reference   reference;
 326         struct si_screen        *screen;
 327         struct util_queue_fence ready;
 328         struct si_compiler_ctx_state compiler_ctx_state;
 329
 330         mtx_t           mutex;
 331         struct si_shader        *first_variant; /* immutable after the first variant */
 332         struct si_shader        *last_variant; /* mutable */
 333
 334         /* The compiled TGSI shader expecting a prolog and/or epilog (not
 335          * uploaded to a buffer).
 336          */
 337         struct si_shader        *main_shader_part;
 338         struct si_shader        *main_shader_part_ls; /* as_ls is set in the key */
 339         struct si_shader        *main_shader_part_es; /* as_es is set in the key */
 340
 341         struct si_shader        *gs_copy_shader;
 342
 343         struct tgsi_token       *tokens;
 344         struct nir_shader       *nir;
 345         struct pipe_stream_output_info  so;
 346         struct tgsi_shader_info         info;
 347         struct tgsi_tessctrl_info       tcs_info;
 348
 349         /* PIPE_SHADER_[VERTEX|FRAGMENT|...] */
 350         unsigned        type;
 351         bool            vs_needs_prolog;
 352         bool            force_correct_derivs_after_kill;
 353         unsigned        pa_cl_vs_out_cntl;
 354         ubyte           clipdist_mask;
 355         ubyte           culldist_mask;
 356
 357         /* ES parameters. */
 358         unsigned        esgs_itemsize;
 359
 360         /* GS parameters. */
 361         unsigned        gs_input_verts_per_prim;
 362         unsigned        gs_output_prim;
 363         unsigned        gs_max_out_vertices;
 364         unsigned        gs_num_invocations;
 365         unsigned        max_gs_stream; /* count - 1 */
 366         unsigned        gsvs_vertex_size;
 367         unsigned        max_gsvs_emit_size;
 368         unsigned        enabled_streamout_buffer_mask;
 369
 370         /* PS parameters. */
 371         unsigned        color_attr_index[2];
 372         unsigned        db_shader_control;
 373         /* Set 0xf or 0x0 (4 bits) per each written output.
 374          * ANDed with spi_shader_col_format.
 375          */
 376         unsigned        colors_written_4bit;
 377
 378         /* CS parameters */
 379         unsigned local_size;
 380
 381         uint64_t        outputs_written;        /* "get_unique_index" bits */
 382         uint32_t        patch_outputs_written;  /* "get_unique_index_patch" bits */
 383
 384         uint64_t        inputs_read;            /* "get_unique_index" bits */
 385
 386         /* bitmasks of used descriptor slots */
 387         uint32_t        active_const_and_shader_buffers;
 388         uint64_t        active_samplers_and_images;
 389 };
 390
 391 /* Valid shader configurations:
 392  *
 393  * API shaders       VS | TCS | TES | GS |pass| PS
 394  * are compiled as:     |     |     |    |thru|
 395  *                      |     |     |    |    |
 396  * Only VS & PS:     VS |     |     |    |    | PS
 397  * GFX6 - with GS:   ES |     |     | GS | VS | PS
 398  *      - with tess: LS | HS  | VS  |    |    | PS
 399  *      - with both: LS | HS  | ES  | GS | VS | PS
 400  * GFX9 - with GS:   -> |     |     | GS | VS | PS
 401  *      - with tess: -> | HS  | VS  |    |    | PS
 402  *      - with both: -> | HS  | ->  | GS | VS | PS
 403  *
 404  * -> = merged with the next stage
 405  */
 406
 407 /* Use the byte alignment for all following structure members for optimal
 408  * shader key memory footprint.
 409  */
 410 #pragma pack(push, 1)
 411
 412 /* Common VS bits between the shader key and the prolog key. */
 413 struct si_vs_prolog_bits {
 414         /* - If neither "is_one" nor "is_fetched" has a bit set, the instance
 415          *   divisor is 0.
 416          * - If "is_one" has a bit set, the instance divisor is 1.
 417          * - If "is_fetched" has a bit set, the instance divisor will be loaded
 418          *   from the constant buffer.
 419          */
 420         uint16_t        instance_divisor_is_one;     /* bitmask of inputs */
 421         uint16_t        instance_divisor_is_fetched; /* bitmask of inputs */
 422         unsigned        ls_vgpr_fix:1;
 423 };
 424
 425 /* Common TCS bits between the shader key and the epilog key. */
 426 struct si_tcs_epilog_bits {
 427         unsigned        prim_mode:3;
 428         unsigned        invoc0_tess_factors_are_def:1;
 429         unsigned        tes_reads_tess_factors:1;
 430 };
 431
 432 struct si_gs_prolog_bits {
 433         unsigned        tri_strip_adj_fix:1;
 434         unsigned        gfx9_prev_is_vs:1;
 435 };
 436
 437 /* Common PS bits between the shader key and the prolog key. */
 438 struct si_ps_prolog_bits {
 439         unsigned        color_two_side:1;
 440         unsigned        flatshade_colors:1;
 441         unsigned        poly_stipple:1;
 442         unsigned        force_persp_sample_interp:1;
 443         unsigned        force_linear_sample_interp:1;
 444         unsigned        force_persp_center_interp:1;
 445         unsigned        force_linear_center_interp:1;
 446         unsigned        bc_optimize_for_persp:1;
 447         unsigned        bc_optimize_for_linear:1;
 448         unsigned        samplemask_log_ps_iter:3;
 449 };
 450
 451 /* Common PS bits between the shader key and the epilog key. */
 452 struct si_ps_epilog_bits {
 453         unsigned        spi_shader_col_format;
 454         unsigned        color_is_int8:8;
 455         unsigned        color_is_int10:8;
 456         unsigned        last_cbuf:3;
 457         unsigned        alpha_func:3;
 458         unsigned        alpha_to_one:1;
 459         unsigned        poly_line_smoothing:1;
 460         unsigned        clamp_color:1;
 461 };
 462
 463 union si_shader_part_key {
 464         struct {
 465                 struct si_vs_prolog_bits states;
 466                 unsigned        num_input_sgprs:6;
 467                 /* For merged stages such as LS-HS, HS input VGPRs are first. */
 468                 unsigned        num_merged_next_stage_vgprs:3;
 469                 unsigned        last_input:4;
 470                 unsigned        as_ls:1;
 471                 unsigned        as_es:1;
 472                 /* Prologs for monolithic shaders shouldn't set EXEC. */
 473                 unsigned        is_monolithic:1;
 474         } vs_prolog;
 475         struct {
 476                 struct si_tcs_epilog_bits states;
 477         } tcs_epilog;
 478         struct {
 479                 struct si_gs_prolog_bits states;
 480                 /* Prologs of monolithic shaders shouldn't set EXEC. */
 481                 unsigned        is_monolithic:1;
 482         } gs_prolog;
 483         struct {
 484                 struct si_ps_prolog_bits states;
 485                 unsigned        num_input_sgprs:6;
 486                 unsigned        num_input_vgprs:5;
 487                 /* Color interpolation and two-side color selection. */
 488                 unsigned        colors_read:8; /* color input components read */
 489                 unsigned        num_interp_inputs:5; /* BCOLOR is at this location */
 490                 unsigned        face_vgpr_index:5;
 491                 unsigned        ancillary_vgpr_index:5;
 492                 unsigned        wqm:1;
 493                 char            color_attr_index[2];
 494                 char            color_interp_vgpr_index[2]; /* -1 == constant */
 495         } ps_prolog;
 496         struct {
 497                 struct si_ps_epilog_bits states;
 498                 unsigned        colors_written:8;
 499                 unsigned        writes_z:1;
 500                 unsigned        writes_stencil:1;
 501                 unsigned        writes_samplemask:1;
 502         } ps_epilog;
 503 };
 504
 505 struct si_shader_key {
 506         /* Prolog and epilog flags. */
 507         union {
 508                 struct {
 509                         struct si_vs_prolog_bits prolog;
 510                 } vs;
 511                 struct {
 512                         struct si_vs_prolog_bits ls_prolog; /* for merged LS-HS */
 513                         struct si_shader_selector *ls;   /* for merged LS-HS */
 514                         struct si_tcs_epilog_bits epilog;
 515                 } tcs; /* tessellation control shader */
 516                 struct {
 517                         struct si_vs_prolog_bits vs_prolog; /* for merged ES-GS */
 518                         struct si_shader_selector *es;   /* for merged ES-GS */
 519                         struct si_gs_prolog_bits prolog;
 520                 } gs;
 521                 struct {
 522                         struct si_ps_prolog_bits prolog;
 523                         struct si_ps_epilog_bits epilog;
 524                 } ps;
 525         } part;
 526
 527         /* These two are initially set according to the NEXT_SHADER property,
 528          * or guessed if the property doesn't seem correct.
 529          */
 530         unsigned as_es:1; /* export shader, which precedes GS */
 531         unsigned as_ls:1; /* local shader, which precedes TCS */
 532
 533         /* Flags for monolithic compilation only. */
 534         struct {
 535                 /* One byte for every input: SI_FIX_FETCH_* enums. */
 536                 uint8_t         vs_fix_fetch[SI_MAX_ATTRIBS];
 537
 538                 union {
 539                         uint64_t        ff_tcs_inputs_to_copy; /* for fixed-func TCS */
 540                         /* When PS needs PrimID and GS is disabled. */
 541                         unsigned        vs_export_prim_id:1;
 542                         struct {
 543                                 unsigned interpolate_at_sample_force_center:1;
 544                                 unsigned fbfetch_msaa;
 545                                 unsigned fbfetch_is_1D;
 546                                 unsigned fbfetch_layered;
 547                         } ps;
 548                 } u;
 549         } mono;
 550
 551         /* Optimization flags for asynchronous compilation only. */
 552         struct {
 553                 /* For HW VS (it can be VS, TES, GS) */
 554                 uint64_t        kill_outputs; /* "get_unique_index" bits */
 555                 unsigned        clip_disable:1;
 556
 557                 /* For shaders where monolithic variants have better code.
 558                  *
 559                  * This is a flag that has no effect on code generation,
 560                  * but forces monolithic shaders to be used as soon as
 561                  * possible, because it's in the "opt" group.
 562                  */
 563                 unsigned        prefer_mono:1;
 564         } opt;
 565 };
 566
 567 /* Restore the pack alignment to default. */
 568 #pragma pack(pop)
 569
 570 struct si_shader_config {
 571         unsigned                        num_sgprs;
 572         unsigned                        num_vgprs;
 573         unsigned                        spilled_sgprs;
 574         unsigned                        spilled_vgprs;
 575         unsigned                        private_mem_vgprs;
 576         unsigned                        lds_size;
 577         unsigned                        max_simd_waves;
 578         unsigned                        spi_ps_input_ena;
 579         unsigned                        spi_ps_input_addr;
 580         unsigned                        float_mode;
 581         unsigned                        scratch_bytes_per_wave;
 582         unsigned                        rsrc1;
 583         unsigned                        rsrc2;
 584 };
 585
 586 /* GCN-specific shader info. */
 587 struct si_shader_info {
 588         ubyte                   vs_output_param_offset[SI_MAX_VS_OUTPUTS];
 589         ubyte                   num_input_sgprs;
 590         ubyte                   num_input_vgprs;
 591         signed char             face_vgpr_index;
 592         signed char             ancillary_vgpr_index;
 593         bool                    uses_instanceid;
 594         ubyte                   nr_pos_exports;
 595         ubyte                   nr_param_exports;
 596 };
 597
 598 struct si_shader {
 599         struct si_compiler_ctx_state    compiler_ctx_state;
 600
 601         struct si_shader_selector       *selector;
 602         struct si_shader_selector       *previous_stage_sel; /* for refcounting */
 603         struct si_shader                *next_variant;
 604
 605         struct si_shader_part           *prolog;
 606         struct si_shader                *previous_stage; /* for GFX9 */
 607         struct si_shader_part           *prolog2;
 608         struct si_shader_part           *epilog;
 609
 610         struct si_pm4_state             *pm4;
 611         struct r600_resource            *bo;
 612         struct r600_resource            *scratch_bo;
 613         struct si_shader_key            key;
 614         struct util_queue_fence         ready;
 615         bool                            compilation_failed;
 616         bool                            is_monolithic;
 617         bool                            is_optimized;
 618         bool                            is_binary_shared;
 619         bool                            is_gs_copy_shader;
 620
 621         /* The following data is all that's needed for binary shaders. */
 622         struct ac_shader_binary binary;
 623         struct si_shader_config         config;
 624         struct si_shader_info           info;
 625
 626         /* Shader key + LLVM IR + disassembly + statistics.
 627          * Generated for debug contexts only.
 628          */
 629         char                            *shader_log;
 630         size_t                          shader_log_size;
 631 };
 632
 633 struct si_shader_part {
 634         struct si_shader_part *next;
 635         union si_shader_part_key key;
 636         struct ac_shader_binary binary;
 637         struct si_shader_config config;
 638 };
 639
 640 /* si_shader.c */
 641 struct si_shader *
 642 si_generate_gs_copy_shader(struct si_screen *sscreen,
 643                            LLVMTargetMachineRef tm,
 644                            struct si_shader_selector *gs_selector,
 645                            struct pipe_debug_callback *debug);
 646 int si_compile_tgsi_shader(struct si_screen *sscreen,
 647                            LLVMTargetMachineRef tm,
 648                            struct si_shader *shader,
 649                            bool is_monolithic,
 650                            struct pipe_debug_callback *debug);
 651 int si_shader_create(struct si_screen *sscreen, LLVMTargetMachineRef tm,
 652                      struct si_shader *shader,
 653                      struct pipe_debug_callback *debug);
 654 void si_shader_destroy(struct si_shader *shader);
 655 unsigned si_shader_io_get_unique_index_patch(unsigned semantic_name, unsigned index);
 656 unsigned si_shader_io_get_unique_index(unsigned semantic_name, unsigned index);
 657 int si_shader_binary_upload(struct si_screen *sscreen, struct si_shader *shader);
 658 void si_shader_dump(struct si_screen *sscreen, const struct si_shader *shader,
 659                     struct pipe_debug_callback *debug, unsigned processor,
 660                     FILE *f, bool check_debug_option);
 661 void si_shader_dump_stats_for_shader_db(const struct si_shader *shader,
 662                                         struct pipe_debug_callback *debug);
 663 void si_multiwave_lds_size_workaround(struct si_screen *sscreen,
 664                                       unsigned *lds_size);
 665 void si_shader_apply_scratch_relocs(struct si_shader *shader,
 666                                     uint64_t scratch_va);
 667 void si_shader_binary_read_config(struct ac_shader_binary *binary,
 668                                   struct si_shader_config *conf,
 669                                   unsigned symbol_offset);
 670 const char *si_get_shader_name(const struct si_shader *shader, unsigned processor);
 671
 672 /* si_shader_nir.c */
 673 void si_nir_scan_shader(const struct nir_shader *nir,
 674                         struct tgsi_shader_info *info);
 675 void si_nir_scan_tess_ctrl(const struct nir_shader *nir,
 676                            const struct tgsi_shader_info *info,
 677                            struct tgsi_tessctrl_info *out);
 678 void si_lower_nir(struct si_shader_selector *sel);
 679
 680 /* Inline helpers. */
 681
 682 /* Return the pointer to the main shader part's pointer. */
 683 static inline struct si_shader **
 684 si_get_main_shader_part(struct si_shader_selector *sel,
 685                         struct si_shader_key *key)
 686 {
 687         if (key->as_ls)
 688                 return &sel->main_shader_part_ls;
 689         if (key->as_es)
 690                 return &sel->main_shader_part_es;
 691         return &sel->main_shader_part;
 692 }
 693
 694 static inline bool
 695 si_shader_uses_bindless_samplers(struct si_shader_selector *selector)
 696 {
 697         return selector ? selector->info.uses_bindless_samplers : false;
 698 }
 699
 700 static inline bool
 701 si_shader_uses_bindless_images(struct si_shader_selector *selector)
 702 {
 703         return selector ? selector->info.uses_bindless_images : false;
 704 }
 705
 706 void si_destroy_shader_selector(struct si_context *sctx,
 707                                 struct si_shader_selector *sel);
 708
 709 static inline void
 710 si_shader_selector_reference(struct si_context *sctx,
 711                              struct si_shader_selector **dst,
 712                              struct si_shader_selector *src)
 713 {
 714         if (pipe_reference(&(*dst)->reference, &src->reference))
 715                 si_destroy_shader_selector(sctx, *dst);
 716
 717         *dst = src;
 718 }
 719
 720 #endif