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

   1 /*
   2  * Copyright © 2013 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_vec4_gs.c
  26  *
  27  * State atom for client-programmable geometry shaders, and support code.
  28  */
  29
  30 #include "brw_gs.h"
  31 #include "brw_context.h"
  32 #include "brw_vec4_gs_visitor.h"
  33 #include "brw_state.h"
  34 #include "brw_ff_gs.h"
  35 #include "brw_nir.h"
  36 #include "brw_program.h"
  37 #include "compiler/glsl/ir_uniform.h"
  38
  39 static void
  40 brw_gs_debug_recompile(struct brw_context *brw, struct gl_program *prog,
  41                        const struct brw_gs_prog_key *key)
  42 {
  43    struct brw_cache_item *c = NULL;
  44    const struct brw_gs_prog_key *old_key = NULL;
  45    bool found = false;
  46
  47    perf_debug("Recompiling geometry shader for program %d\n", prog->Id);
  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_GS_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 void
  76 assign_gs_binding_table_offsets(const struct gen_device_info *devinfo,
  77                                 const struct gl_shader_program *shader_prog,
  78                                 const struct gl_program *prog,
  79                                 struct brw_gs_prog_data *prog_data)
  80 {
  81    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
  82     * feedback surfaces.
  83     */
  84    uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
  85
  86    brw_assign_common_binding_table_offsets(MESA_SHADER_GEOMETRY, devinfo,
  87                                            shader_prog, prog,
  88                                            &prog_data->base.base,
  89                                            reserved);
  90 }
  91
  92 bool
  93 brw_codegen_gs_prog(struct brw_context *brw,
  94                     struct gl_shader_program *prog,
  95                     struct brw_program *gp,
  96                     struct brw_gs_prog_key *key)
  97 {
  98    struct brw_compiler *compiler = brw->screen->compiler;
  99    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 100    struct brw_stage_state *stage_state = &brw->gs.base;
 101    struct brw_gs_prog_data prog_data;
 102    bool start_busy = false;
 103    double start_time = 0;
 104
 105    memset(&prog_data, 0, sizeof(prog_data));
 106
 107    assign_gs_binding_table_offsets(devinfo, prog, &gp->program, &prog_data);
 108
 109    /* Allocate the references to the uniforms that will end up in the
 110     * prog_data associated with the compiled program, and which will be freed
 111     * by the state cache.
 112     *
 113     * Note: param_count needs to be num_uniform_components * 4, since we add
 114     * padding around uniform values below vec4 size, so the worst case is that
 115     * every uniform is a float which gets padded to the size of a vec4.
 116     */
 117    int param_count = gp->program.nir->num_uniforms / 4;
 118
 119    prog_data.base.base.param =
 120       rzalloc_array(NULL, const gl_constant_value *, param_count);
 121    prog_data.base.base.pull_param =
 122       rzalloc_array(NULL, const gl_constant_value *, param_count);
 123    prog_data.base.base.image_param =
 124       rzalloc_array(NULL, struct brw_image_param,
 125                     gp->program.info.num_images);
 126    prog_data.base.base.nr_params = param_count;
 127    prog_data.base.base.nr_image_params = gp->program.info.num_images;
 128
 129    brw_nir_setup_glsl_uniforms(gp->program.nir, prog, &gp->program,
 130                                &prog_data.base.base,
 131                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
 132
 133    uint64_t outputs_written = gp->program.info.outputs_written;
 134
 135    brw_compute_vue_map(devinfo,
 136                        &prog_data.base.vue_map, outputs_written,
 137                        gp->program.info.separate_shader);
 138
 139    int st_index = -1;
 140    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 141       st_index = brw_get_shader_time_index(brw, &gp->program, ST_GS, true);
 142
 143    if (unlikely(brw->perf_debug)) {
 144       start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
 145       start_time = get_time();
 146    }
 147
 148    void *mem_ctx = ralloc_context(NULL);
 149    unsigned program_size;
 150    char *error_str;
 151    const unsigned *program =
 152       brw_compile_gs(brw->screen->compiler, brw, mem_ctx, key,
 153                      &prog_data, gp->program.nir, &gp->program,
 154                      st_index, &program_size, &error_str);
 155    if (program == NULL) {
 156       ralloc_strcat(&gp->program.sh.data->InfoLog, error_str);
 157       _mesa_problem(NULL, "Failed to compile geometry shader: %s\n", error_str);
 158
 159       ralloc_free(mem_ctx);
 160       return false;
 161    }
 162
 163    if (unlikely(brw->perf_debug)) {
 164       if (gp->compiled_once) {
 165          brw_gs_debug_recompile(brw, &gp->program, key);
 166       }
 167       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 168          perf_debug("GS compile took %.03f ms and stalled the GPU\n",
 169                     (get_time() - start_time) * 1000);
 170       }
 171       gp->compiled_once = true;
 172    }
 173
 174    /* Scratch space is used for register spilling */
 175    brw_alloc_stage_scratch(brw, stage_state,
 176                            prog_data.base.base.total_scratch,
 177                            devinfo->max_gs_threads);
 178
 179    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 180                     key, sizeof(*key),
 181                     program, program_size,
 182                     &prog_data, sizeof(prog_data),
 183                     &stage_state->prog_offset, &brw->gs.base.prog_data);
 184    ralloc_free(mem_ctx);
 185
 186    return true;
 187 }
 188
 189 static bool
 190 brw_gs_state_dirty(const struct brw_context *brw)
 191 {
 192    return brw_state_dirty(brw,
 193                           _NEW_TEXTURE,
 194                           BRW_NEW_GEOMETRY_PROGRAM |
 195                           BRW_NEW_TRANSFORM_FEEDBACK);
 196 }
 197
 198 void
 199 brw_gs_populate_key(struct brw_context *brw,
 200                     struct brw_gs_prog_key *key)
 201 {
 202    struct gl_context *ctx = &brw->ctx;
 203    struct brw_program *gp = (struct brw_program *) brw->geometry_program;
 204
 205    memset(key, 0, sizeof(*key));
 206
 207    key->program_string_id = gp->id;
 208
 209    /* _NEW_TEXTURE */
 210    brw_populate_sampler_prog_key_data(ctx, &gp->program, &key->tex);
 211 }
 212
 213 void
 214 brw_upload_gs_prog(struct brw_context *brw)
 215 {
 216    struct gl_context *ctx = &brw->ctx;
 217    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 218    struct brw_stage_state *stage_state = &brw->gs.base;
 219    struct brw_gs_prog_key key;
 220    /* BRW_NEW_GEOMETRY_PROGRAM */
 221    struct brw_program *gp = (struct brw_program *) brw->geometry_program;
 222
 223    if (!brw_gs_state_dirty(brw))
 224       return;
 225
 226    if (gp == NULL) {
 227       /* No geometry shader.  Vertex data just passes straight through. */
 228       if (brw->gen == 6 &&
 229           (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
 230          gen6_brw_upload_ff_gs_prog(brw);
 231          return;
 232       }
 233
 234       /* Other state atoms had better not try to access prog_data, since
 235        * there's no GS program.
 236        */
 237       brw->gs.base.prog_data = NULL;
 238
 239       return;
 240    }
 241
 242    brw_gs_populate_key(brw, &key);
 243
 244    if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
 245                          &key, sizeof(key),
 246                          &stage_state->prog_offset,
 247                          &brw->gs.base.prog_data)) {
 248       bool success = brw_codegen_gs_prog(brw, current[MESA_SHADER_GEOMETRY],
 249                                          gp, &key);
 250       assert(success);
 251       (void)success;
 252    }
 253 }
 254
 255 bool
 256 brw_gs_precompile(struct gl_context *ctx,
 257                   struct gl_shader_program *shader_prog,
 258                   struct gl_program *prog)
 259 {
 260    struct brw_context *brw = brw_context(ctx);
 261    struct brw_gs_prog_key key;
 262    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 263    struct brw_stage_prog_data *old_prog_data = brw->gs.base.prog_data;
 264    bool success;
 265
 266    struct brw_program *bgp = brw_program(prog);
 267
 268    memset(&key, 0, sizeof(key));
 269
 270    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 271    key.program_string_id = bgp->id;
 272
 273    success = brw_codegen_gs_prog(brw, shader_prog, bgp, &key);
 274
 275    brw->gs.base.prog_offset = old_prog_offset;
 276    brw->gs.base.prog_data = old_prog_data;
 277
 278    return success;
 279 }