src/mesa/drivers/dri/i965/brw_tes.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (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 NONINFRINGEMENT.  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  * \file brw_tes.c
  26  *
  27  * Tessellation evaluation shader state upload code.
  28  */
  29
  30 #include "brw_context.h"
  31 #include "brw_nir.h"
  32 #include "brw_program.h"
  33 #include "brw_shader.h"
  34 #include "brw_state.h"
  35 #include "program/prog_parameter.h"
  36
  37 static void
  38 brw_tes_debug_recompile(struct brw_context *brw,
  39                        struct gl_shader_program *shader_prog,
  40                        const struct brw_tes_prog_key *key)
  41 {
  42    struct brw_cache_item *c = NULL;
  43    const struct brw_tes_prog_key *old_key = NULL;
  44    bool found = false;
  45
  46    perf_debug("Recompiling tessellation evaluation shader for program %d\n",
  47               shader_prog->Name);
  48
  49    for (unsigned int i = 0; i < brw->cache.size; i++) {
  50       for (c = brw->cache.items[i]; c; c = c->next) {
  51          if (c->cache_id == BRW_CACHE_TES_PROG) {
  52             old_key = c->key;
  53
  54             if (old_key->program_string_id == key->program_string_id)
  55                break;
  56          }
  57       }
  58       if (c)
  59          break;
  60    }
  61
  62    if (!c) {
  63       perf_debug("  Didn't find previous compile in the shader cache for "
  64                  "debug\n");
  65       return;
  66    }
  67
  68    found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
  69
  70    if (!found) {
  71       perf_debug("  Something else\n");
  72    }
  73 }
  74
  75 static bool
  76 brw_codegen_tes_prog(struct brw_context *brw,
  77                      struct gl_shader_program *shader_prog,
  78                      struct brw_tess_eval_program *tep,
  79                      struct brw_tes_prog_key *key)
  80 {
  81    const struct brw_compiler *compiler = brw->intelScreen->compiler;
  82    const struct brw_device_info *devinfo = brw->intelScreen->devinfo;
  83    struct brw_stage_state *stage_state = &brw->tes.base;
  84    nir_shader *nir = tep->program.Base.nir;
  85    struct brw_tes_prog_data prog_data;
  86    bool start_busy = false;
  87    double start_time = 0;
  88
  89    memset(&prog_data, 0, sizeof(prog_data));
  90
  91    brw_assign_common_binding_table_offsets(MESA_SHADER_TESS_EVAL, devinfo,
  92                                            shader_prog, &tep->program.Base,
  93                                            &prog_data.base.base, 0);
  94
  95    switch (tep->program.Spacing) {
  96    case GL_EQUAL:
  97       prog_data.partitioning = BRW_TESS_PARTITIONING_INTEGER;
  98       break;
  99    case GL_FRACTIONAL_ODD:
 100       prog_data.partitioning = BRW_TESS_PARTITIONING_ODD_FRACTIONAL;
 101       break;
 102    case GL_FRACTIONAL_EVEN:
 103       prog_data.partitioning = BRW_TESS_PARTITIONING_EVEN_FRACTIONAL;
 104       break;
 105    default:
 106       unreachable("invalid domain shader spacing");
 107    }
 108
 109    switch (tep->program.PrimitiveMode) {
 110    case GL_QUADS:
 111       prog_data.domain = BRW_TESS_DOMAIN_QUAD;
 112       break;
 113    case GL_TRIANGLES:
 114       prog_data.domain = BRW_TESS_DOMAIN_TRI;
 115       break;
 116    case GL_ISOLINES:
 117       prog_data.domain = BRW_TESS_DOMAIN_ISOLINE;
 118       break;
 119    default:
 120       unreachable("invalid domain shader primitive mode");
 121    }
 122
 123    if (tep->program.PointMode) {
 124       prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_POINT;
 125    } else if (tep->program.PrimitiveMode == GL_ISOLINES) {
 126       prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_LINE;
 127    } else {
 128       /* Hardware winding order is backwards from OpenGL */
 129       switch (tep->program.VertexOrder) {
 130       case GL_CCW:
 131          prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_TRI_CW;
 132          break;
 133       case GL_CW:
 134          prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_TRI_CCW;
 135          break;
 136       default:
 137          unreachable("invalid domain shader vertex order");
 138       }
 139    }
 140
 141    /* Allocate the references to the uniforms that will end up in the
 142     * prog_data associated with the compiled program, and which will be freed
 143     * by the state cache.
 144     *
 145     * Note: param_count needs to be num_uniform_components * 4, since we add
 146     * padding around uniform values below vec4 size, so the worst case is that
 147     * every uniform is a float which gets padded to the size of a vec4.
 148     */
 149    struct gl_shader *tes = shader_prog->_LinkedShaders[MESA_SHADER_TESS_EVAL];
 150    int param_count = nir->num_uniforms;
 151    if (!compiler->scalar_stage[MESA_SHADER_TESS_EVAL])
 152       param_count *= 4;
 153
 154    prog_data.base.base.param =
 155       rzalloc_array(NULL, const gl_constant_value *, param_count);
 156    prog_data.base.base.pull_param =
 157       rzalloc_array(NULL, const gl_constant_value *, param_count);
 158    prog_data.base.base.image_param =
 159       rzalloc_array(NULL, struct brw_image_param, tes->NumImages);
 160    prog_data.base.base.nr_params = param_count;
 161    prog_data.base.base.nr_image_params = tes->NumImages;
 162
 163    brw_nir_setup_glsl_uniforms(nir, shader_prog, &tep->program.Base,
 164                                &prog_data.base.base,
 165                                compiler->scalar_stage[MESA_SHADER_TESS_EVAL]);
 166
 167    if (unlikely(INTEL_DEBUG & DEBUG_TES))
 168       brw_dump_ir("tessellation evaluation", shader_prog, tes, NULL);
 169
 170    int st_index = -1;
 171    if (unlikely(INTEL_DEBUG & DEBUG_SHADER_TIME))
 172       st_index = brw_get_shader_time_index(brw, shader_prog, NULL, ST_TES);
 173
 174    if (unlikely(brw->perf_debug)) {
 175       start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
 176       start_time = get_time();
 177    }
 178
 179    void *mem_ctx = ralloc_context(NULL);
 180    unsigned program_size;
 181    char *error_str;
 182    const unsigned *program =
 183       brw_compile_tes(compiler, brw, mem_ctx, key, &prog_data, nir,
 184                       shader_prog, st_index, &program_size, &error_str);
 185    if (program == NULL) {
 186       if (shader_prog) {
 187          shader_prog->LinkStatus = false;
 188          ralloc_strcat(&shader_prog->InfoLog, error_str);
 189       }
 190
 191       _mesa_problem(NULL, "Failed to compile tessellation evaluation shader: "
 192                     "%s\n", error_str);
 193
 194       ralloc_free(mem_ctx);
 195       return false;
 196    }
 197
 198    if (unlikely(brw->perf_debug)) {
 199       struct brw_shader *btes = (struct brw_shader *) tes;
 200       if (btes->compiled_once) {
 201          brw_tes_debug_recompile(brw, shader_prog, key);
 202       }
 203       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 204          perf_debug("TES compile took %.03f ms and stalled the GPU\n",
 205                     (get_time() - start_time) * 1000);
 206       }
 207       btes->compiled_once = true;
 208    }
 209
 210    /* Scratch space is used for register spilling */
 211    if (prog_data.base.base.total_scratch) {
 212       brw_get_scratch_bo(brw, &stage_state->scratch_bo,
 213                          prog_data.base.base.total_scratch *
 214                          brw->max_ds_threads);
 215    }
 216
 217    brw_upload_cache(&brw->cache, BRW_CACHE_TES_PROG,
 218                     key, sizeof(*key),
 219                     program, program_size,
 220                     &prog_data, sizeof(prog_data),
 221                     &stage_state->prog_offset, &brw->tes.prog_data);
 222    ralloc_free(mem_ctx);
 223
 224    return true;
 225 }
 226
 227
 228 void
 229 brw_upload_tes_prog(struct brw_context *brw)
 230 {
 231    struct gl_context *ctx = &brw->ctx;
 232    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 233    struct brw_stage_state *stage_state = &brw->tes.base;
 234    struct brw_tes_prog_key key;
 235    /* BRW_NEW_TESS_PROGRAMS */
 236    struct brw_tess_eval_program *tep =
 237       (struct brw_tess_eval_program *) brw->tess_eval_program;
 238
 239    if (!brw_state_dirty(brw,
 240                         _NEW_TEXTURE,
 241                         BRW_NEW_TESS_PROGRAMS))
 242       return;
 243
 244    struct gl_program *prog = &tep->program.Base;
 245
 246    memset(&key, 0, sizeof(key));
 247
 248    key.program_string_id = tep->id;
 249
 250    /* _NEW_TEXTURE */
 251    brw_populate_sampler_prog_key_data(ctx, prog, stage_state->sampler_count,
 252                                       &key.tex);
 253
 254    if (!brw_search_cache(&brw->cache, BRW_CACHE_TES_PROG,
 255                          &key, sizeof(key),
 256                          &stage_state->prog_offset, &brw->tes.prog_data)) {
 257       bool success = brw_codegen_tes_prog(brw, current[MESA_SHADER_TESS_EVAL],
 258                                           tep, &key);
 259       assert(success);
 260       (void)success;
 261    }
 262    brw->tes.base.prog_data = &brw->tes.prog_data->base.base;
 263 }
 264
 265
 266 bool
 267 brw_tes_precompile(struct gl_context *ctx,
 268                    struct gl_shader_program *shader_prog,
 269                    struct gl_program *prog)
 270 {
 271    struct brw_context *brw = brw_context(ctx);
 272    struct brw_tes_prog_key key;
 273    uint32_t old_prog_offset = brw->tes.base.prog_offset;
 274    struct brw_tes_prog_data *old_prog_data = brw->tes.prog_data;
 275    bool success;
 276
 277    struct gl_tess_eval_program *tep = (struct gl_tess_eval_program *)prog;
 278    struct brw_tess_eval_program *btep = brw_tess_eval_program(tep);
 279
 280    memset(&key, 0, sizeof(key));
 281
 282    key.program_string_id = btep->id;
 283    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 284
 285    success = brw_codegen_tes_prog(brw, shader_prog, btep, &key);
 286
 287    brw->tes.base.prog_offset = old_prog_offset;
 288    brw->tes.prog_data = old_prog_data;
 289
 290    return success;
 291 }