src/gallium/drivers/radeonsi/si_shader.h

   1 /*
   2  * Copyright 2012 Advanced Micro Devices, Inc.
   3  * All Rights Reserved.
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /* The compiler middle-end architecture: Explaining (non-)monolithic shaders
  26  * -------------------------------------------------------------------------
  27  *
  28  * Typically, there is one-to-one correspondence between API and HW shaders,
  29  * that is, for every API shader, there is exactly one shader binary in
  30  * the driver.
  31  *
  32  * The problem with that is that we also have to emulate some API states
  33  * (e.g. alpha-test, and many others) in shaders too. The two obvious ways
  34  * to deal with it are:
  35  * - each shader has multiple variants for each combination of emulated states,
  36  *   and the variants are compiled on demand, possibly relying on a shader
  37  *   cache for good performance
  38  * - patch shaders at the binary level
  39  *
  40  * This driver uses something completely different. The emulated states are
  41  * usually implemented at the beginning or end of shaders. Therefore, we can
  42  * split the shader into 3 parts:
  43  * - prolog part (shader code dependent on states)
  44  * - main part (the API shader)
  45  * - epilog part (shader code dependent on states)
  46  *
  47  * Each part is compiled as a separate shader and the final binaries are
  48  * concatenated. This type of shader is called non-monolithic, because it
  49  * consists of multiple independent binaries. Creating a new shader variant
  50  * is therefore only a concatenation of shader parts (binaries) and doesn't
  51  * involve any compilation. The main shader parts are the only parts that are
  52  * compiled when applications create shader objects. The prolog and epilog
  53  * parts are compiled on the first use and saved, so that their binaries can
  54  * be reused by many other shaders.
  55  *
  56  * One of the roles of the prolog part is to compute vertex buffer addresses
  57  * for vertex shaders. A few of the roles of the epilog part are color buffer
  58  * format conversions in pixel shaders that we have to do manually, and write
  59  * tessellation factors in tessellation control shaders. The prolog and epilog
  60  * have many other important responsibilities in various shader stages.
  61  * They don't just "emulate legacy stuff".
  62  *
  63  * Monolithic shaders are shaders where the parts are combined before LLVM
  64  * compilation, and the whole thing is compiled and optimized as one unit with
  65  * one binary on the output. The result is the same as the non-monolithic
  66  * shader, but the final code can be better, because LLVM can optimize across
  67  * all shader parts. Monolithic shaders aren't usually used except for these
  68  * special cases:
  69  *
  70  * 1) Some rarely-used states require modification of the main shader part
  71  *    itself, and in such cases, only the monolithic shader variant is
  72  *    compiled, and that's always done on the first use.
  73  *
  74  * 2) When we do cross-stage optimizations for separate shader objects and
  75  *    e.g. eliminate unused shader varyings, the resulting optimized shader
  76  *    variants are always compiled as monolithic shaders, and always
  77  *    asynchronously (i.e. not stalling ongoing rendering). We call them
  78  *    "optimized monolithic" shaders. The important property here is that
  79  *    the non-monolithic unoptimized shader variant is always available for use
  80  *    when the asynchronous compilation of the optimized shader is not done
  81  *    yet.
  82  *
  83  * Starting with GFX9 chips, some shader stages are merged, and the number of
  84  * shader parts per shader increased. The complete new list of shader parts is:
  85  * - 1st shader: prolog part
  86  * - 1st shader: main part
  87  * - 2nd shader: prolog part
  88  * - 2nd shader: main part
  89  * - 2nd shader: epilog part
  90  */
  91
  92 /* How linking shader inputs and outputs between vertex, tessellation, and
  93  * geometry shaders works.
  94  *
  95  * Inputs and outputs between shaders are stored in a buffer. This buffer
  96  * lives in LDS (typical case for tessellation), but it can also live
  97  * in memory (ESGS). Each input or output has a fixed location within a vertex.
  98  * The highest used input or output determines the stride between vertices.
  99  *
 100  * Since GS and tessellation are only possible in the OpenGL core profile,
 101  * only these semantics are valid for per-vertex data:
 102  *
 103  *   Name             Location
 104  *
 105  *   POSITION         0
 106  *   PSIZE            1
 107  *   CLIPDIST0..1     2..3
 108  *   CULLDIST0..1     (not implemented)
 109  *   GENERIC0..31     4..35
 110  *
 111  * For example, a shader only writing GENERIC0 has the output stride of 5.
 112  *
 113  * Only these semantics are valid for per-patch data:
 114  *
 115  *   Name             Location
 116  *
 117  *   TESSOUTER        0
 118  *   TESSINNER        1
 119  *   PATCH0..29       2..31
 120  *
 121  * That's how independent shaders agree on input and output locations.
 122  * The si_shader_io_get_unique_index function assigns the locations.
 123  *
 124  * For tessellation, other required information for calculating the input and
 125  * output addresses like the vertex stride, the patch stride, and the offsets
 126  * where per-vertex and per-patch data start, is passed to the shader via
 127  * user data SGPRs. The offsets and strides are calculated at draw time and
 128  * aren't available at compile time.
 129  */
 130
 131 #ifndef SI_SHADER_H
 132 #define SI_SHADER_H
 133
 134 #include <llvm-c/Core.h> /* LLVMModuleRef */
 135 #include <llvm-c/TargetMachine.h>
 136 #include "tgsi/tgsi_scan.h"
 137 #include "util/u_inlines.h"
 138 #include "util/u_queue.h"
 139 #include "util/simple_mtx.h"
 140
 141 #include "ac_binary.h"
 142 #include "ac_llvm_build.h"
 143 #include "ac_llvm_util.h"
 144
 145 #include <stdio.h>
 146
 147 // Use LDS symbols when supported by LLVM. Can be disabled for testing the old
 148 // path on newer LLVM for now. Should be removed in the long term.
 149 #define USE_LDS_SYMBOLS (true)
 150
 151 struct nir_shader;
 152 struct si_shader;
 153 struct si_context;
 154
 155 #define SI_MAX_ATTRIBS          16
 156 #define SI_MAX_VS_OUTPUTS       40
 157
 158 /* Shader IO unique indices are supported for TGSI_SEMANTIC_GENERIC with an
 159  * index smaller than this.
 160  */
 161 #define SI_MAX_IO_GENERIC       32
 162
 163 /* SGPR user data indices */
 164 enum {
 165         SI_SGPR_RW_BUFFERS,  /* rings (& stream-out, VS only) */
 166         SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES,
 167         SI_SGPR_CONST_AND_SHADER_BUFFERS, /* or just a constant buffer 0 pointer */
 168         SI_SGPR_SAMPLERS_AND_IMAGES,
 169         SI_NUM_RESOURCE_SGPRS,
 170
 171         /* API VS, TES without GS, GS copy shader */
 172         SI_SGPR_VS_STATE_BITS = SI_NUM_RESOURCE_SGPRS,
 173         SI_NUM_VS_STATE_RESOURCE_SGPRS,
 174
 175         /* all VS variants */
 176         SI_SGPR_BASE_VERTEX = SI_NUM_VS_STATE_RESOURCE_SGPRS,
 177         SI_SGPR_START_INSTANCE,
 178         SI_SGPR_DRAWID,
 179         SI_VS_NUM_USER_SGPR,
 180
 181         SI_SGPR_VS_BLIT_DATA = SI_SGPR_CONST_AND_SHADER_BUFFERS,
 182
 183         /* TES */
 184         SI_SGPR_TES_OFFCHIP_LAYOUT = SI_NUM_VS_STATE_RESOURCE_SGPRS,
 185         SI_SGPR_TES_OFFCHIP_ADDR,
 186         SI_TES_NUM_USER_SGPR,
 187
 188         /* GFX6-8: TCS only */
 189         GFX6_SGPR_TCS_OFFCHIP_LAYOUT = SI_NUM_RESOURCE_SGPRS,
 190         GFX6_SGPR_TCS_OUT_OFFSETS,
 191         GFX6_SGPR_TCS_OUT_LAYOUT,
 192         GFX6_SGPR_TCS_IN_LAYOUT,
 193         GFX6_TCS_NUM_USER_SGPR,
 194
 195         /* GFX9: Merged shaders. */
 196         /* 2ND_CONST_AND_SHADER_BUFFERS is set in USER_DATA_ADDR_LO (SGPR0). */
 197         /* 2ND_SAMPLERS_AND_IMAGES is set in USER_DATA_ADDR_HI (SGPR1). */
 198         GFX9_MERGED_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,
 199
 200         /* GFX9: Merged LS-HS (VS-TCS) only. */
 201         GFX9_SGPR_TCS_OFFCHIP_LAYOUT = GFX9_MERGED_NUM_USER_SGPR,
 202         GFX9_SGPR_TCS_OUT_OFFSETS,
 203         GFX9_SGPR_TCS_OUT_LAYOUT,
 204         GFX9_TCS_NUM_USER_SGPR,
 205
 206         /* GS limits */
 207         GFX6_GS_NUM_USER_SGPR = SI_NUM_RESOURCE_SGPRS,
 208         GFX9_VSGS_NUM_USER_SGPR = SI_VS_NUM_USER_SGPR,
 209         GFX9_TESGS_NUM_USER_SGPR = SI_TES_NUM_USER_SGPR,
 210         SI_GSCOPY_NUM_USER_SGPR = SI_NUM_VS_STATE_RESOURCE_SGPRS,
 211
 212         /* PS only */
 213         SI_SGPR_ALPHA_REF       = SI_NUM_RESOURCE_SGPRS,
 214         SI_PS_NUM_USER_SGPR,
 215 };
 216
 217 /* LLVM function parameter indices */
 218 enum {
 219         SI_NUM_RESOURCE_PARAMS = 4,
 220
 221         /* PS only parameters */
 222         SI_PARAM_ALPHA_REF = SI_NUM_RESOURCE_PARAMS,
 223         SI_PARAM_PRIM_MASK,
 224         SI_PARAM_PERSP_SAMPLE,
 225         SI_PARAM_PERSP_CENTER,
 226         SI_PARAM_PERSP_CENTROID,
 227         SI_PARAM_PERSP_PULL_MODEL,
 228         SI_PARAM_LINEAR_SAMPLE,
 229         SI_PARAM_LINEAR_CENTER,
 230         SI_PARAM_LINEAR_CENTROID,
 231         SI_PARAM_LINE_STIPPLE_TEX,
 232         SI_PARAM_POS_X_FLOAT,
 233         SI_PARAM_POS_Y_FLOAT,
 234         SI_PARAM_POS_Z_FLOAT,
 235         SI_PARAM_POS_W_FLOAT,
 236         SI_PARAM_FRONT_FACE,
 237         SI_PARAM_ANCILLARY,
 238         SI_PARAM_SAMPLE_COVERAGE,
 239         SI_PARAM_POS_FIXED_PT,
 240
 241         SI_NUM_PARAMS = SI_PARAM_POS_FIXED_PT + 9, /* +8 for COLOR[0..1] */
 242 };
 243
 244 /* Fields of driver-defined VS state SGPR. */
 245 #define S_VS_STATE_CLAMP_VERTEX_COLOR(x)        (((unsigned)(x) & 0x1) << 0)
 246 #define C_VS_STATE_CLAMP_VERTEX_COLOR           0xFFFFFFFE
 247 #define S_VS_STATE_INDEXED(x)                   (((unsigned)(x) & 0x1) << 1)
 248 #define C_VS_STATE_INDEXED                      0xFFFFFFFD
 249 #define S_VS_STATE_OUTPRIM(x)                   (((unsigned)(x) & 0x3) << 2)
 250 #define C_VS_STATE_OUTPRIM                      0xFFFFFFF3
 251 #define S_VS_STATE_PROVOKING_VTX_INDEX(x)       (((unsigned)(x) & 0x3) << 4)
 252 #define C_VS_STATE_PROVOKING_VTX_INDEX          0xFFFFFFCF
 253 #define S_VS_STATE_STREAMOUT_QUERY_ENABLED(x)   (((unsigned)(x) & 0x1) << 6)
 254 #define C_VS_STATE_STREAMOUT_QUERY_ENABLED      0xFFFFFFBF
 255 #define S_VS_STATE_LS_OUT_PATCH_SIZE(x)         (((unsigned)(x) & 0x1FFF) << 8)
 256 #define C_VS_STATE_LS_OUT_PATCH_SIZE            0xFFE000FF
 257 #define S_VS_STATE_LS_OUT_VERTEX_SIZE(x)        (((unsigned)(x) & 0xFF) << 24)
 258 #define C_VS_STATE_LS_OUT_VERTEX_SIZE           0x00FFFFFF
 259
 260 enum {
 261         /* Use a property enum that CS wouldn't use. */
 262         TGSI_PROPERTY_CS_LOCAL_SIZE = TGSI_PROPERTY_FS_COORD_ORIGIN,
 263
 264         /* These represent the number of SGPRs the shader uses. */
 265         SI_VS_BLIT_SGPRS_POS = 3,
 266         SI_VS_BLIT_SGPRS_POS_COLOR = 7,
 267         SI_VS_BLIT_SGPRS_POS_TEXCOORD = 9,
 268 };
 269
 270 /**
 271  * For VS shader keys, describe any fixups required for vertex fetch.
 272  *
 273  * \ref log_size, \ref format, and the number of channels are interpreted as
 274  * by \ref ac_build_opencoded_load_format.
 275  *
 276  * Note: all bits 0 (size = 1 byte, num channels = 1, format = float) is an
 277  * impossible format and indicates that no fixup is needed (just use
 278  * buffer_load_format_xyzw).
 279  */
 280 union si_vs_fix_fetch {
 281         struct {
 282                 uint8_t log_size : 2; /* 1, 2, 4, 8 or bytes per channel */
 283                 uint8_t num_channels_m1 : 2; /* number of channels minus 1 */
 284                 uint8_t format : 3; /* AC_FETCH_FORMAT_xxx */
 285                 uint8_t reverse : 1; /* reverse XYZ channels */
 286         } u;
 287         uint8_t bits;
 288 };
 289
 290 struct si_shader;
 291
 292 /* State of the context creating the shader object. */
 293 struct si_compiler_ctx_state {
 294         /* Should only be used by si_init_shader_selector_async and
 295          * si_build_shader_variant if thread_index == -1 (non-threaded). */
 296         struct ac_llvm_compiler         *compiler;
 297
 298         /* Used if thread_index == -1 or if debug.async is true. */
 299         struct pipe_debug_callback      debug;
 300
 301         /* Used for creating the log string for gallium/ddebug. */
 302         bool                            is_debug_context;
 303 };
 304
 305 /* A shader selector is a gallium CSO and contains shader variants and
 306  * binaries for one TGSI program. This can be shared by multiple contexts.
 307  */
 308 struct si_shader_selector {
 309         struct pipe_reference   reference;
 310         struct si_screen        *screen;
 311         struct util_queue_fence ready;
 312         struct si_compiler_ctx_state compiler_ctx_state;
 313
 314         simple_mtx_t            mutex;
 315         struct si_shader        *first_variant; /* immutable after the first variant */
 316         struct si_shader        *last_variant; /* mutable */
 317
 318         /* The compiled TGSI shader expecting a prolog and/or epilog (not
 319          * uploaded to a buffer).
 320          */
 321         struct si_shader        *main_shader_part;
 322         struct si_shader        *main_shader_part_ls; /* as_ls is set in the key */
 323         struct si_shader        *main_shader_part_es; /* as_es is set in the key */
 324         struct si_shader        *main_shader_part_ngg; /* as_ngg is set in the key */
 325         struct si_shader        *main_shader_part_ngg_es; /* for Wave32 TES before legacy GS */
 326
 327         struct si_shader        *gs_copy_shader;
 328
 329         struct tgsi_token       *tokens;
 330         struct nir_shader       *nir;
 331         struct pipe_stream_output_info  so;
 332         struct tgsi_shader_info         info;
 333         struct tgsi_tessctrl_info       tcs_info;
 334
 335         /* PIPE_SHADER_[VERTEX|FRAGMENT|...] */
 336         enum pipe_shader_type type;
 337         bool            vs_needs_prolog;
 338         bool            force_correct_derivs_after_kill;
 339         bool            prim_discard_cs_allowed;
 340         unsigned        pa_cl_vs_out_cntl;
 341         ubyte           clipdist_mask;
 342         ubyte           culldist_mask;
 343         unsigned        rast_prim;
 344
 345         /* ES parameters. */
 346         unsigned        esgs_itemsize; /* vertex stride */
 347         unsigned        lshs_vertex_stride;
 348
 349         /* GS parameters. */
 350         unsigned        gs_input_verts_per_prim;
 351         unsigned        gs_output_prim;
 352         unsigned        gs_max_out_vertices;
 353         unsigned        gs_num_invocations;
 354         unsigned        max_gs_stream; /* count - 1 */
 355         unsigned        gsvs_vertex_size;
 356         unsigned        max_gsvs_emit_size;
 357         unsigned        enabled_streamout_buffer_mask;
 358         bool            tess_turns_off_ngg;
 359
 360         /* PS parameters. */
 361         unsigned        color_attr_index[2];
 362         unsigned        db_shader_control;
 363         /* Set 0xf or 0x0 (4 bits) per each written output.
 364          * ANDed with spi_shader_col_format.
 365          */
 366         unsigned        colors_written_4bit;
 367
 368         uint64_t        outputs_written_before_ps; /* "get_unique_index" bits */
 369         uint64_t        outputs_written;        /* "get_unique_index" bits */
 370         uint32_t        patch_outputs_written;  /* "get_unique_index_patch" bits */
 371
 372         uint64_t        inputs_read;            /* "get_unique_index" bits */
 373
 374         /* bitmasks of used descriptor slots */
 375         uint32_t        active_const_and_shader_buffers;
 376         uint64_t        active_samplers_and_images;
 377 };
 378
 379 /* Valid shader configurations:
 380  *
 381  * API shaders           VS | TCS | TES | GS |pass| PS
 382  * are compiled as:         |     |     |    |thru|
 383  *                          |     |     |    |    |
 384  * Only VS & PS:         VS |     |     |    |    | PS
 385  * GFX6     - with GS:   ES |     |     | GS | VS | PS
 386  *          - with tess: LS | HS  | VS  |    |    | PS
 387  *          - with both: LS | HS  | ES  | GS | VS | PS
 388  * GFX9     - with GS:   -> |     |     | GS | VS | PS
 389  *          - with tess: -> | HS  | VS  |    |    | PS
 390  *          - with both: -> | HS  | ->  | GS | VS | PS
 391  *                          |     |     |    |    |
 392  * NGG      - VS & PS:   GS |     |     |    |    | PS
 393  * (GFX10+) - with GS:   -> |     |     | GS |    | PS
 394  *          - with tess: -> | HS  | GS  |    |    | PS
 395  *          - with both: -> | HS  | ->  | GS |    | PS
 396  *
 397  * -> = merged with the next stage
 398  */
 399
 400 /* Use the byte alignment for all following structure members for optimal
 401  * shader key memory footprint.
 402  */
 403 #pragma pack(push, 1)
 404
 405 /* Common VS bits between the shader key and the prolog key. */
 406 struct si_vs_prolog_bits {
 407         /* - If neither "is_one" nor "is_fetched" has a bit set, the instance
 408          *   divisor is 0.
 409          * - If "is_one" has a bit set, the instance divisor is 1.
 410          * - If "is_fetched" has a bit set, the instance divisor will be loaded
 411          *   from the constant buffer.
 412          */
 413         uint16_t        instance_divisor_is_one;     /* bitmask of inputs */
 414         uint16_t        instance_divisor_is_fetched; /* bitmask of inputs */
 415         unsigned        ls_vgpr_fix:1;
 416         unsigned        unpack_instance_id_from_vertex_id:1;
 417 };
 418
 419 /* Common TCS bits between the shader key and the epilog key. */
 420 struct si_tcs_epilog_bits {
 421         unsigned        prim_mode:3;
 422         unsigned        invoc0_tess_factors_are_def:1;
 423         unsigned        tes_reads_tess_factors:1;
 424 };
 425
 426 struct si_gs_prolog_bits {
 427         unsigned        tri_strip_adj_fix:1;
 428         unsigned        gfx9_prev_is_vs:1;
 429 };
 430
 431 /* Common PS bits between the shader key and the prolog key. */
 432 struct si_ps_prolog_bits {
 433         unsigned        color_two_side:1;
 434         unsigned        flatshade_colors:1;
 435         unsigned        poly_stipple:1;
 436         unsigned        force_persp_sample_interp:1;
 437         unsigned        force_linear_sample_interp:1;
 438         unsigned        force_persp_center_interp:1;
 439         unsigned        force_linear_center_interp:1;
 440         unsigned        bc_optimize_for_persp:1;
 441         unsigned        bc_optimize_for_linear:1;
 442         unsigned        samplemask_log_ps_iter:3;
 443 };
 444
 445 /* Common PS bits between the shader key and the epilog key. */
 446 struct si_ps_epilog_bits {
 447         unsigned        spi_shader_col_format;
 448         unsigned        color_is_int8:8;
 449         unsigned        color_is_int10:8;
 450         unsigned        last_cbuf:3;
 451         unsigned        alpha_func:3;
 452         unsigned        alpha_to_one:1;
 453         unsigned        poly_line_smoothing:1;
 454         unsigned        clamp_color:1;
 455 };
 456
 457 union si_shader_part_key {
 458         struct {
 459                 struct si_vs_prolog_bits states;
 460                 unsigned        num_input_sgprs:6;
 461                 /* For merged stages such as LS-HS, HS input VGPRs are first. */
 462                 unsigned        num_merged_next_stage_vgprs:3;
 463                 unsigned        last_input:4;
 464                 unsigned        as_ls:1;
 465                 unsigned        as_es:1;
 466                 unsigned        as_ngg:1;
 467                 /* Prologs for monolithic shaders shouldn't set EXEC. */
 468                 unsigned        is_monolithic:1;
 469         } vs_prolog;
 470         struct {
 471                 struct si_tcs_epilog_bits states;
 472         } tcs_epilog;
 473         struct {
 474                 struct si_gs_prolog_bits states;
 475                 /* Prologs of monolithic shaders shouldn't set EXEC. */
 476                 unsigned        is_monolithic:1;
 477                 unsigned        as_ngg:1;
 478         } gs_prolog;
 479         struct {
 480                 struct si_ps_prolog_bits states;
 481                 unsigned        num_input_sgprs:6;
 482                 unsigned        num_input_vgprs:5;
 483                 /* Color interpolation and two-side color selection. */
 484                 unsigned        colors_read:8; /* color input components read */
 485                 unsigned        num_interp_inputs:5; /* BCOLOR is at this location */
 486                 unsigned        face_vgpr_index:5;
 487                 unsigned        ancillary_vgpr_index:5;
 488                 unsigned        wqm:1;
 489                 char            color_attr_index[2];
 490                 signed char     color_interp_vgpr_index[2]; /* -1 == constant */
 491         } ps_prolog;
 492         struct {
 493                 struct si_ps_epilog_bits states;
 494                 unsigned        colors_written:8;
 495                 unsigned        writes_z:1;
 496                 unsigned        writes_stencil:1;
 497                 unsigned        writes_samplemask:1;
 498         } ps_epilog;
 499 };
 500
 501 struct si_shader_key {
 502         /* Prolog and epilog flags. */
 503         union {
 504                 struct {
 505                         struct si_vs_prolog_bits prolog;
 506                 } vs;
 507                 struct {
 508                         struct si_vs_prolog_bits ls_prolog; /* for merged LS-HS */
 509                         struct si_shader_selector *ls;   /* for merged LS-HS */
 510                         struct si_tcs_epilog_bits epilog;
 511                 } tcs; /* tessellation control shader */
 512                 struct {
 513                         struct si_vs_prolog_bits vs_prolog; /* for merged ES-GS */
 514                         struct si_shader_selector *es;   /* for merged ES-GS */
 515                         struct si_gs_prolog_bits prolog;
 516                 } gs;
 517                 struct {
 518                         struct si_ps_prolog_bits prolog;
 519                         struct si_ps_epilog_bits epilog;
 520                 } ps;
 521         } part;
 522
 523         /* These three are initially set according to the NEXT_SHADER property,
 524          * or guessed if the property doesn't seem correct.
 525          */
 526         unsigned as_es:1; /* export shader, which precedes GS */
 527         unsigned as_ls:1; /* local shader, which precedes TCS */
 528         unsigned as_ngg:1; /* VS, TES, or GS compiled as NGG primitive shader */
 529
 530         /* Flags for monolithic compilation only. */
 531         struct {
 532                 /* Whether fetch should be opencoded according to vs_fix_fetch.
 533                  * Otherwise, if vs_fix_fetch is non-zero, buffer_load_format_xyzw
 534                  * with minimal fixups is used. */
 535                 uint16_t vs_fetch_opencode;
 536                 union si_vs_fix_fetch 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:1;
 545                                 unsigned fbfetch_is_1D:1;
 546                                 unsigned fbfetch_layered:1;
 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
 565                 /* Primitive discard compute shader. */
 566                 unsigned        vs_as_prim_discard_cs:1;
 567                 unsigned        cs_prim_type:4;
 568                 unsigned        cs_indexed:1;
 569                 unsigned        cs_instancing:1;
 570                 unsigned        cs_primitive_restart:1;
 571                 unsigned        cs_provoking_vertex_first:1;
 572                 unsigned        cs_need_correct_orientation:1;
 573                 unsigned        cs_cull_front:1;
 574                 unsigned        cs_cull_back:1;
 575                 unsigned        cs_cull_z:1;
 576                 unsigned        cs_halfz_clip_space:1;
 577         } opt;
 578 };
 579
 580 /* Restore the pack alignment to default. */
 581 #pragma pack(pop)
 582
 583 /* GCN-specific shader info. */
 584 struct si_shader_info {
 585         ubyte                   vs_output_param_offset[SI_MAX_VS_OUTPUTS];
 586         ubyte                   num_input_sgprs;
 587         ubyte                   num_input_vgprs;
 588         signed char             face_vgpr_index;
 589         signed char             ancillary_vgpr_index;
 590         bool                    uses_instanceid;
 591         ubyte                   nr_pos_exports;
 592         ubyte                   nr_param_exports;
 593         unsigned                private_mem_vgprs;
 594         unsigned                max_simd_waves;
 595 };
 596
 597 struct si_shader_binary {
 598         const char *elf_buffer;
 599         size_t elf_size;
 600
 601         char *llvm_ir_string;
 602 };
 603
 604 struct gfx9_gs_info {
 605         unsigned es_verts_per_subgroup;
 606         unsigned gs_prims_per_subgroup;
 607         unsigned gs_inst_prims_in_subgroup;
 608         unsigned max_prims_per_subgroup;
 609         unsigned esgs_ring_size; /* in bytes */
 610 };
 611
 612 struct si_shader {
 613         struct si_compiler_ctx_state    compiler_ctx_state;
 614
 615         struct si_shader_selector       *selector;
 616         struct si_shader_selector       *previous_stage_sel; /* for refcounting */
 617         struct si_shader                *next_variant;
 618
 619         struct si_shader_part           *prolog;
 620         struct si_shader                *previous_stage; /* for GFX9 */
 621         struct si_shader_part           *prolog2;
 622         struct si_shader_part           *epilog;
 623
 624         struct si_pm4_state             *pm4;
 625         struct si_resource              *bo;
 626         struct si_resource              *scratch_bo;
 627         struct si_shader_key            key;
 628         struct util_queue_fence         ready;
 629         bool                            compilation_failed;
 630         bool                            is_monolithic;
 631         bool                            is_optimized;
 632         bool                            is_binary_shared;
 633         bool                            is_gs_copy_shader;
 634
 635         /* The following data is all that's needed for binary shaders. */
 636         struct si_shader_binary         binary;
 637         struct ac_shader_config         config;
 638         struct si_shader_info           info;
 639
 640         struct {
 641                 uint16_t ngg_emit_size; /* in dwords */
 642                 uint16_t hw_max_esverts;
 643                 uint16_t max_gsprims;
 644                 uint16_t max_out_verts;
 645                 uint16_t prim_amp_factor;
 646                 bool max_vert_out_per_gs_instance;
 647         } ngg;
 648
 649         /* Shader key + LLVM IR + disassembly + statistics.
 650          * Generated for debug contexts only.
 651          */
 652         char                            *shader_log;
 653         size_t                          shader_log_size;
 654
 655         struct gfx9_gs_info gs_info;
 656
 657         /* For save precompute context registers values. */
 658         union {
 659                 struct {
 660                         unsigned        vgt_gsvs_ring_offset_1;
 661                         unsigned        vgt_gsvs_ring_offset_2;
 662                         unsigned        vgt_gsvs_ring_offset_3;
 663                         unsigned        vgt_gsvs_ring_itemsize;
 664                         unsigned        vgt_gs_max_vert_out;
 665                         unsigned        vgt_gs_vert_itemsize;
 666                         unsigned        vgt_gs_vert_itemsize_1;
 667                         unsigned        vgt_gs_vert_itemsize_2;
 668                         unsigned        vgt_gs_vert_itemsize_3;
 669                         unsigned        vgt_gs_instance_cnt;
 670                         unsigned        vgt_gs_onchip_cntl;
 671                         unsigned        vgt_gs_max_prims_per_subgroup;
 672                         unsigned        vgt_esgs_ring_itemsize;
 673                 } gs;
 674
 675                 struct {
 676                         unsigned        ge_max_output_per_subgroup;
 677                         unsigned        ge_ngg_subgrp_cntl;
 678                         unsigned        vgt_primitiveid_en;
 679                         unsigned        vgt_gs_onchip_cntl;
 680                         unsigned        vgt_gs_instance_cnt;
 681                         unsigned        vgt_esgs_ring_itemsize;
 682                         unsigned        spi_vs_out_config;
 683                         unsigned        spi_shader_idx_format;
 684                         unsigned        spi_shader_pos_format;
 685                         unsigned        pa_cl_vte_cntl;
 686                         unsigned        pa_cl_ngg_cntl;
 687                         unsigned        vgt_gs_max_vert_out; /* for API GS */
 688                 } ngg;
 689
 690                 struct {
 691                         unsigned        vgt_gs_mode;
 692                         unsigned        vgt_primitiveid_en;
 693                         unsigned        vgt_reuse_off;
 694                         unsigned        spi_vs_out_config;
 695                         unsigned        spi_shader_pos_format;
 696                         unsigned        pa_cl_vte_cntl;
 697                 } vs;
 698
 699                 struct {
 700                         unsigned        spi_ps_input_ena;
 701                         unsigned        spi_ps_input_addr;
 702                         unsigned        spi_baryc_cntl;
 703                         unsigned        spi_ps_in_control;
 704                         unsigned        spi_shader_z_format;
 705                         unsigned        spi_shader_col_format;
 706                         unsigned        cb_shader_mask;
 707                 } ps;
 708         } ctx_reg;
 709
 710         /*For save precompute registers value */
 711         unsigned vgt_tf_param; /* VGT_TF_PARAM */
 712         unsigned vgt_vertex_reuse_block_cntl; /* VGT_VERTEX_REUSE_BLOCK_CNTL */
 713         unsigned pa_cl_vs_out_cntl;
 714         unsigned ge_cntl;
 715 };
 716
 717 struct si_shader_part {
 718         struct si_shader_part *next;
 719         union si_shader_part_key key;
 720         struct si_shader_binary binary;
 721         struct ac_shader_config config;
 722 };
 723
 724 /* si_shader.c */
 725 struct si_shader *
 726 si_generate_gs_copy_shader(struct si_screen *sscreen,
 727                            struct ac_llvm_compiler *compiler,
 728                            struct si_shader_selector *gs_selector,
 729                            struct pipe_debug_callback *debug);
 730 int si_compile_tgsi_shader(struct si_screen *sscreen,
 731                            struct ac_llvm_compiler *compiler,
 732                            struct si_shader *shader,
 733                            struct pipe_debug_callback *debug);
 734 bool si_shader_create(struct si_screen *sscreen, struct ac_llvm_compiler *compiler,
 735                      struct si_shader *shader,
 736                      struct pipe_debug_callback *debug);
 737 void si_shader_destroy(struct si_shader *shader);
 738 unsigned si_shader_io_get_unique_index_patch(unsigned semantic_name, unsigned index);
 739 unsigned si_shader_io_get_unique_index(unsigned semantic_name, unsigned index,
 740                                        unsigned is_varying);
 741 bool si_shader_binary_upload(struct si_screen *sscreen, struct si_shader *shader,
 742                              uint64_t scratch_va);
 743 void si_shader_dump(struct si_screen *sscreen, struct si_shader *shader,
 744                     struct pipe_debug_callback *debug,
 745                     FILE *f, bool check_debug_option);
 746 void si_shader_dump_stats_for_shader_db(struct si_screen *screen,
 747                                         struct si_shader *shader,
 748                                         struct pipe_debug_callback *debug);
 749 void si_multiwave_lds_size_workaround(struct si_screen *sscreen,
 750                                       unsigned *lds_size);
 751 const char *si_get_shader_name(const struct si_shader *shader);
 752 void si_shader_binary_clean(struct si_shader_binary *binary);
 753
 754 /* si_shader_nir.c */
 755 void si_nir_scan_shader(const struct nir_shader *nir,
 756                         struct tgsi_shader_info *info);
 757 void si_nir_scan_tess_ctrl(const struct nir_shader *nir,
 758                            struct tgsi_tessctrl_info *out);
 759 void si_nir_lower_ps_inputs(struct nir_shader *nir);
 760 void si_lower_nir(struct si_screen *sscreen, struct nir_shader *nir);
 761 void si_nir_opts(struct nir_shader *nir);
 762
 763 /* si_state_shaders.c */
 764 void gfx9_get_gs_info(struct si_shader_selector *es,
 765                       struct si_shader_selector *gs,
 766                       struct gfx9_gs_info *out);
 767
 768 /* Inline helpers. */
 769
 770 /* Return the pointer to the main shader part's pointer. */
 771 static inline struct si_shader **
 772 si_get_main_shader_part(struct si_shader_selector *sel,
 773                         struct si_shader_key *key)
 774 {
 775         if (key->as_ls)
 776                 return &sel->main_shader_part_ls;
 777         if (key->as_es && key->as_ngg)
 778                 return &sel->main_shader_part_ngg_es;
 779         if (key->as_es)
 780                 return &sel->main_shader_part_es;
 781         if (key->as_ngg)
 782                 return &sel->main_shader_part_ngg;
 783         return &sel->main_shader_part;
 784 }
 785
 786 static inline bool
 787 si_shader_uses_bindless_samplers(struct si_shader_selector *selector)
 788 {
 789         return selector ? selector->info.uses_bindless_samplers : false;
 790 }
 791
 792 static inline bool
 793 si_shader_uses_bindless_images(struct si_shader_selector *selector)
 794 {
 795         return selector ? selector->info.uses_bindless_images : false;
 796 }
 797
 798 void si_destroy_shader_selector(struct si_context *sctx,
 799                                 struct si_shader_selector *sel);
 800
 801 static inline void
 802 si_shader_selector_reference(struct si_context *sctx,
 803                              struct si_shader_selector **dst,
 804                              struct si_shader_selector *src)
 805 {
 806         if (pipe_reference(&(*dst)->reference, &src->reference))
 807                 si_destroy_shader_selector(sctx, *dst);
 808
 809         *dst = src;
 810 }
 811
 812 #endif