src/gallium/drivers/lima/lima_program.c

   1 /*
   2  * Copyright (c) 2017-2019 Lima Project
   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, sub license,
   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 (including the
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include "util/u_memory.h"
  26 #include "util/ralloc.h"
  27 #include "util/u_debug.h"
  28
  29 #include "tgsi/tgsi_dump.h"
  30 #include "compiler/nir/nir.h"
  31 #include "nir/tgsi_to_nir.h"
  32
  33 #include "pipe/p_state.h"
  34
  35 #include "lima_screen.h"
  36 #include "lima_context.h"
  37 #include "lima_program.h"
  38 #include "lima_bo.h"
  39 #include "ir/lima_ir.h"
  40
  41 static const nir_shader_compiler_options vs_nir_options = {
  42    .lower_ffma = true,
  43    .lower_fpow = true,
  44    .lower_ffract = true,
  45    .lower_fdiv = true,
  46    .lower_fmod = true,
  47    .lower_fsqrt = true,
  48    .lower_sub = true,
  49    .lower_flrp32 = true,
  50    .lower_flrp64 = true,
  51    .lower_ftrunc = true,
  52    /* could be implemented by clamp */
  53    .lower_fsat = true,
  54    .lower_bitops = true,
  55    .lower_rotate = true,
  56    .lower_sincos = true,
  57    .lower_fceil = true,
  58 };
  59
  60 static const nir_shader_compiler_options fs_nir_options = {
  61    .lower_ffma = true,
  62    .lower_fpow = true,
  63    .lower_fdiv = true,
  64    .lower_fmod = true,
  65    .lower_sub = true,
  66    .lower_flrp32 = true,
  67    .lower_flrp64 = true,
  68    .lower_fsign = true,
  69    .lower_rotate = true,
  70    .lower_fdot = true,
  71    .lower_bitops = true,
  72    .lower_vector_cmp = true,
  73 };
  74
  75 static const struct nir_lower_tex_options tex_options = {
  76    .lower_txp = ~0u,
  77 };
  78
  79 const void *
  80 lima_program_get_compiler_options(enum pipe_shader_type shader)
  81 {
  82    switch (shader) {
  83    case PIPE_SHADER_VERTEX:
  84       return &vs_nir_options;
  85    case PIPE_SHADER_FRAGMENT:
  86       return &fs_nir_options;
  87    default:
  88       return NULL;
  89    }
  90 }
  91
  92 static int
  93 type_size(const struct glsl_type *type, bool bindless)
  94 {
  95    return glsl_count_attribute_slots(type, false);
  96 }
  97
  98 void
  99 lima_program_optimize_vs_nir(struct nir_shader *s)
 100 {
 101    bool progress;
 102
 103    NIR_PASS_V(s, nir_lower_viewport_transform);
 104    NIR_PASS_V(s, nir_lower_io, nir_var_all, type_size, 0);
 105    NIR_PASS_V(s, nir_lower_load_const_to_scalar);
 106    NIR_PASS_V(s, lima_nir_lower_uniform_to_scalar);
 107    NIR_PASS_V(s, nir_lower_io_to_scalar,
 108               nir_var_shader_in|nir_var_shader_out);
 109
 110    do {
 111       progress = false;
 112
 113       NIR_PASS_V(s, nir_lower_vars_to_ssa);
 114       NIR_PASS(progress, s, nir_lower_alu_to_scalar, NULL, NULL);
 115       NIR_PASS(progress, s, nir_lower_phis_to_scalar);
 116       NIR_PASS(progress, s, nir_copy_prop);
 117       NIR_PASS(progress, s, nir_opt_remove_phis);
 118       NIR_PASS(progress, s, nir_opt_dce);
 119       NIR_PASS(progress, s, nir_opt_dead_cf);
 120       NIR_PASS(progress, s, nir_opt_cse);
 121       NIR_PASS(progress, s, nir_opt_peephole_select, 8, true, true);
 122       NIR_PASS(progress, s, nir_opt_algebraic);
 123       NIR_PASS(progress, s, nir_opt_constant_folding);
 124       NIR_PASS(progress, s, nir_opt_undef);
 125       NIR_PASS(progress, s, nir_opt_loop_unroll,
 126                nir_var_shader_in |
 127                nir_var_shader_out |
 128                nir_var_function_temp);
 129    } while (progress);
 130
 131    NIR_PASS_V(s, nir_lower_int_to_float);
 132    /* Run opt_algebraic between int_to_float and bool_to_float because
 133     * int_to_float emits ftrunc, and ftrunc lowering generates bool ops
 134     */
 135    do {
 136       progress = false;
 137       NIR_PASS(progress, s, nir_opt_algebraic);
 138    } while (progress);
 139
 140    NIR_PASS_V(s, nir_lower_bool_to_float);
 141
 142    NIR_PASS_V(s, nir_copy_prop);
 143    NIR_PASS_V(s, nir_opt_dce);
 144    NIR_PASS_V(s, nir_lower_locals_to_regs);
 145    NIR_PASS_V(s, nir_convert_from_ssa, true);
 146    NIR_PASS_V(s, nir_remove_dead_variables, nir_var_function_temp);
 147    nir_sweep(s);
 148 }
 149
 150 static bool
 151 lima_alu_to_scalar_filter_cb(const nir_instr *instr, const void *data)
 152 {
 153    if (instr->type != nir_instr_type_alu)
 154       return false;
 155
 156    nir_alu_instr *alu = nir_instr_as_alu(instr);
 157    switch (alu->op) {
 158    case nir_op_frcp:
 159    case nir_op_frsq:
 160    case nir_op_flog2:
 161    case nir_op_fexp2:
 162    case nir_op_fsqrt:
 163    case nir_op_fsin:
 164    case nir_op_fcos:
 165       return true;
 166    default:
 167       break;
 168    }
 169
 170    /* nir vec4 fcsel assumes that each component of the condition will be
 171     * used to select the same component from the two options, but Utgard PP
 172     * has only 1 component condition. If all condition components are not the
 173     * same we need to lower it to scalar.
 174     */
 175    switch (alu->op) {
 176    case nir_op_bcsel:
 177    case nir_op_fcsel:
 178       break;
 179    default:
 180       return false;
 181    }
 182
 183    int num_components = nir_dest_num_components(alu->dest.dest);
 184
 185    uint8_t swizzle = alu->src[0].swizzle[0];
 186
 187    for (int i = 1; i < num_components; i++)
 188       if (alu->src[0].swizzle[i] != swizzle)
 189          return true;
 190
 191    return false;
 192 }
 193
 194 void
 195 lima_program_optimize_fs_nir(struct nir_shader *s)
 196 {
 197    bool progress;
 198
 199    NIR_PASS_V(s, nir_lower_fragcoord_wtrans);
 200    NIR_PASS_V(s, nir_lower_io, nir_var_all, type_size, 0);
 201    NIR_PASS_V(s, nir_lower_regs_to_ssa);
 202    NIR_PASS_V(s, nir_lower_tex, &tex_options);
 203
 204    do {
 205       progress = false;
 206       NIR_PASS(progress, s, nir_opt_vectorize);
 207    } while (progress);
 208
 209    do {
 210       progress = false;
 211
 212       NIR_PASS_V(s, nir_lower_vars_to_ssa);
 213       NIR_PASS(progress, s, nir_lower_alu_to_scalar, lima_alu_to_scalar_filter_cb, NULL);
 214       NIR_PASS(progress, s, nir_copy_prop);
 215       NIR_PASS(progress, s, nir_opt_remove_phis);
 216       NIR_PASS(progress, s, nir_opt_dce);
 217       NIR_PASS(progress, s, nir_opt_dead_cf);
 218       NIR_PASS(progress, s, nir_opt_cse);
 219       NIR_PASS(progress, s, nir_opt_peephole_select, 8, true, true);
 220       NIR_PASS(progress, s, nir_opt_algebraic);
 221       NIR_PASS(progress, s, nir_opt_constant_folding);
 222       NIR_PASS(progress, s, nir_opt_undef);
 223       NIR_PASS(progress, s, nir_opt_loop_unroll,
 224                nir_var_shader_in |
 225                nir_var_shader_out |
 226                nir_var_function_temp);
 227    } while (progress);
 228
 229    NIR_PASS_V(s, nir_lower_int_to_float);
 230    NIR_PASS_V(s, nir_lower_bool_to_float);
 231
 232    /* Some ops must be lowered after being converted from int ops,
 233     * so re-run nir_opt_algebraic after int lowering. */
 234    do {
 235       progress = false;
 236       NIR_PASS(progress, s, nir_opt_algebraic);
 237    } while (progress);
 238
 239    /* Must be run after optimization loop */
 240    NIR_PASS_V(s, lima_nir_scale_trig);
 241
 242    /* Lower modifiers */
 243    NIR_PASS_V(s, nir_lower_to_source_mods, nir_lower_all_source_mods);
 244    NIR_PASS_V(s, nir_copy_prop);
 245    NIR_PASS_V(s, nir_opt_dce);
 246
 247    NIR_PASS_V(s, nir_lower_locals_to_regs);
 248    NIR_PASS_V(s, nir_convert_from_ssa, true);
 249    NIR_PASS_V(s, nir_remove_dead_variables, nir_var_function_temp);
 250
 251    NIR_PASS_V(s, nir_move_vec_src_uses_to_dest);
 252    NIR_PASS_V(s, nir_lower_vec_to_movs);
 253
 254    nir_sweep(s);
 255 }
 256
 257 static void *
 258 lima_create_fs_state(struct pipe_context *pctx,
 259                      const struct pipe_shader_state *cso)
 260 {
 261    struct lima_context *ctx = lima_context(pctx);
 262    struct lima_screen *screen = lima_screen(pctx->screen);
 263    struct lima_fs_shader_state *so = rzalloc(NULL, struct lima_fs_shader_state);
 264
 265    if (!so)
 266       return NULL;
 267
 268    nir_shader *nir;
 269    if (cso->type == PIPE_SHADER_IR_NIR)
 270       nir = cso->ir.nir;
 271    else {
 272       assert(cso->type == PIPE_SHADER_IR_TGSI);
 273
 274       nir = tgsi_to_nir(cso->tokens, pctx->screen);
 275    }
 276
 277    lima_program_optimize_fs_nir(nir);
 278
 279    if (lima_debug & LIMA_DEBUG_PP)
 280       nir_print_shader(nir, stdout);
 281
 282    if (!ppir_compile_nir(so, nir, screen->pp_ra, &ctx->debug)) {
 283       ralloc_free(so);
 284       return NULL;
 285    }
 286
 287    return so;
 288 }
 289
 290 static void
 291 lima_bind_fs_state(struct pipe_context *pctx, void *hwcso)
 292 {
 293    struct lima_context *ctx = lima_context(pctx);
 294
 295    ctx->fs = hwcso;
 296    ctx->dirty |= LIMA_CONTEXT_DIRTY_SHADER_FRAG;
 297 }
 298
 299 static void
 300 lima_delete_fs_state(struct pipe_context *pctx, void *hwcso)
 301 {
 302    struct lima_fs_shader_state *so = hwcso;
 303
 304    if (so->bo)
 305       lima_bo_free(so->bo);
 306
 307    ralloc_free(so);
 308 }
 309
 310 bool
 311 lima_update_vs_state(struct lima_context *ctx)
 312 {
 313    struct lima_vs_shader_state *vs = ctx->vs;
 314    if (!vs->bo) {
 315       struct lima_screen *screen = lima_screen(ctx->base.screen);
 316       vs->bo = lima_bo_create(screen, vs->shader_size, 0);
 317       if (!vs->bo) {
 318          fprintf(stderr, "lima: create vs shader bo fail\n");
 319          return false;
 320       }
 321
 322       memcpy(lima_bo_map(vs->bo), vs->shader, vs->shader_size);
 323       ralloc_free(vs->shader);
 324       vs->shader = NULL;
 325    }
 326
 327    return true;
 328 }
 329
 330 bool
 331 lima_update_fs_state(struct lima_context *ctx)
 332 {
 333    struct lima_fs_shader_state *fs = ctx->fs;
 334    if (!fs->bo) {
 335       struct lima_screen *screen = lima_screen(ctx->base.screen);
 336       fs->bo = lima_bo_create(screen, fs->shader_size, 0);
 337       if (!fs->bo) {
 338          fprintf(stderr, "lima: create fs shader bo fail\n");
 339          return false;
 340       }
 341
 342       memcpy(lima_bo_map(fs->bo), fs->shader, fs->shader_size);
 343       ralloc_free(fs->shader);
 344       fs->shader = NULL;
 345    }
 346
 347    ctx->pp_max_stack_size = MAX2(ctx->pp_max_stack_size, ctx->fs->stack_size);
 348
 349    return true;
 350 }
 351
 352 static void *
 353 lima_create_vs_state(struct pipe_context *pctx,
 354                      const struct pipe_shader_state *cso)
 355 {
 356    struct lima_context *ctx = lima_context(pctx);
 357    struct lima_vs_shader_state *so = rzalloc(NULL, struct lima_vs_shader_state);
 358
 359    if (!so)
 360       return NULL;
 361
 362    nir_shader *nir;
 363    if (cso->type == PIPE_SHADER_IR_NIR)
 364       nir = cso->ir.nir;
 365    else {
 366       assert(cso->type == PIPE_SHADER_IR_TGSI);
 367
 368       nir = tgsi_to_nir(cso->tokens, pctx->screen);
 369    }
 370
 371    lima_program_optimize_vs_nir(nir);
 372
 373    if (lima_debug & LIMA_DEBUG_GP)
 374       nir_print_shader(nir, stdout);
 375
 376    if (!gpir_compile_nir(so, nir, &ctx->debug)) {
 377       ralloc_free(so);
 378       return NULL;
 379    }
 380
 381    return so;
 382 }
 383
 384 static void
 385 lima_bind_vs_state(struct pipe_context *pctx, void *hwcso)
 386 {
 387    struct lima_context *ctx = lima_context(pctx);
 388
 389    ctx->vs = hwcso;
 390    ctx->dirty |= LIMA_CONTEXT_DIRTY_SHADER_VERT;
 391 }
 392
 393 static void
 394 lima_delete_vs_state(struct pipe_context *pctx, void *hwcso)
 395 {
 396    struct lima_vs_shader_state *so = hwcso;
 397
 398    if (so->bo)
 399       lima_bo_free(so->bo);
 400
 401    ralloc_free(so);
 402 }
 403
 404 void
 405 lima_program_init(struct lima_context *ctx)
 406 {
 407    ctx->base.create_fs_state = lima_create_fs_state;
 408    ctx->base.bind_fs_state = lima_bind_fs_state;
 409    ctx->base.delete_fs_state = lima_delete_fs_state;
 410
 411    ctx->base.create_vs_state = lima_create_vs_state;
 412    ctx->base.bind_vs_state = lima_bind_vs_state;
 413    ctx->base.delete_vs_state = lima_delete_vs_state;
 414 }