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