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,
  41                        struct gl_shader_program *shader_prog,
  42                        const struct brw_gs_prog_key *key)
  43 {
  44    struct brw_cache_item *c = NULL;
  45    const struct brw_gs_prog_key *old_key = NULL;
  46    bool found = false;
  47
  48    perf_debug("Recompiling geometry shader for program %d\n",
  49               shader_prog->Name);
  50
  51    for (unsigned int i = 0; i < brw->cache.size; i++) {
  52       for (c = brw->cache.items[i]; c; c = c->next) {
  53          if (c->cache_id == BRW_CACHE_GS_PROG) {
  54             old_key = c->key;
  55
  56             if (old_key->program_string_id == key->program_string_id)
  57                break;
  58          }
  59       }
  60       if (c)
  61          break;
  62    }
  63
  64    if (!c) {
  65       perf_debug("  Didn't find previous compile in the shader cache for "
  66                  "debug\n");
  67       return;
  68    }
  69
  70    found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
  71
  72    if (!found) {
  73       perf_debug("  Something else\n");
  74    }
  75 }
  76
  77 static void
  78 assign_gs_binding_table_offsets(const struct gen_device_info *devinfo,
  79                                 const struct gl_shader_program *shader_prog,
  80                                 const struct gl_program *prog,
  81                                 struct brw_gs_prog_data *prog_data)
  82 {
  83    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
  84     * feedback surfaces.
  85     */
  86    uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
  87
  88    brw_assign_common_binding_table_offsets(MESA_SHADER_GEOMETRY, devinfo,
  89                                            shader_prog, prog,
  90                                            &prog_data->base.base,
  91                                            reserved);
  92 }
  93
  94 bool
  95 brw_codegen_gs_prog(struct brw_context *brw,
  96                     struct gl_shader_program *prog,
  97                     struct brw_program *gp,
  98                     struct brw_gs_prog_key *key)
  99 {
 100    struct brw_compiler *compiler = brw->screen->compiler;
 101    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 102    struct brw_stage_state *stage_state = &brw->gs.base;
 103    struct brw_gs_prog_data prog_data;
 104    bool start_busy = false;
 105    double start_time = 0;
 106
 107    memset(&prog_data, 0, sizeof(prog_data));
 108
 109    assign_gs_binding_table_offsets(devinfo, prog, &gp->program, &prog_data);
 110
 111    /* Allocate the references to the uniforms that will end up in the
 112     * prog_data associated with the compiled program, and which will be freed
 113     * by the state cache.
 114     *
 115     * Note: param_count needs to be num_uniform_components * 4, since we add
 116     * padding around uniform values below vec4 size, so the worst case is that
 117     * every uniform is a float which gets padded to the size of a vec4.
 118     */
 119    int param_count = gp->program.nir->num_uniforms / 4;
 120
 121    prog_data.base.base.param =
 122       rzalloc_array(NULL, const gl_constant_value *, param_count);
 123    prog_data.base.base.pull_param =
 124       rzalloc_array(NULL, const gl_constant_value *, param_count);
 125    prog_data.base.base.image_param =
 126       rzalloc_array(NULL, struct brw_image_param,
 127                     gp->program.info.num_images);
 128    prog_data.base.base.nr_params = param_count;
 129    prog_data.base.base.nr_image_params = gp->program.info.num_images;
 130
 131    brw_nir_setup_glsl_uniforms(gp->program.nir, prog, &gp->program,
 132                                &prog_data.base.base,
 133                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
 134
 135    uint64_t outputs_written = gp->program.info.outputs_written;
 136
 137    brw_compute_vue_map(devinfo,
 138                        &prog_data.base.vue_map, outputs_written,
 139                        prog->SeparateShader);
 140
 141    int st_index = -1;
 142    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 143       st_index = brw_get_shader_time_index(brw, prog, NULL, ST_GS);
 144
 145    if (unlikely(brw->perf_debug)) {
 146       start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
 147       start_time = get_time();
 148    }
 149
 150    void *mem_ctx = ralloc_context(NULL);
 151    unsigned program_size;
 152    char *error_str;
 153    const unsigned *program =
 154       brw_compile_gs(brw->screen->compiler, brw, mem_ctx, key,
 155                      &prog_data, gp->program.nir, prog,
 156                      st_index, &program_size, &error_str);
 157    if (program == NULL) {
 158       ralloc_strcat(&prog->data->InfoLog, error_str);
 159       _mesa_problem(NULL, "Failed to compile geometry shader: %s\n", error_str);
 160
 161       ralloc_free(mem_ctx);
 162       return false;
 163    }
 164
 165    if (unlikely(brw->perf_debug)) {
 166       if (gp->compiled_once) {
 167          brw_gs_debug_recompile(brw, prog, key);
 168       }
 169       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 170          perf_debug("GS compile took %.03f ms and stalled the GPU\n",
 171                     (get_time() - start_time) * 1000);
 172       }
 173       gp->compiled_once = true;
 174    }
 175
 176    /* Scratch space is used for register spilling */
 177    brw_alloc_stage_scratch(brw, stage_state,
 178                            prog_data.base.base.total_scratch,
 179                            devinfo->max_gs_threads);
 180
 181    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 182                     key, sizeof(*key),
 183                     program, program_size,
 184                     &prog_data, sizeof(prog_data),
 185                     &stage_state->prog_offset, &brw->gs.base.prog_data);
 186    ralloc_free(mem_ctx);
 187
 188    return true;
 189 }
 190
 191 static bool
 192 brw_gs_state_dirty(const struct brw_context *brw)
 193 {
 194    return brw_state_dirty(brw,
 195                           _NEW_TEXTURE,
 196                           BRW_NEW_GEOMETRY_PROGRAM |
 197                           BRW_NEW_TRANSFORM_FEEDBACK);
 198 }
 199
 200 void
 201 brw_gs_populate_key(struct brw_context *brw,
 202                     struct brw_gs_prog_key *key)
 203 {
 204    struct gl_context *ctx = &brw->ctx;
 205    struct brw_program *gp = (struct brw_program *) brw->geometry_program;
 206
 207    memset(key, 0, sizeof(*key));
 208
 209    key->program_string_id = gp->id;
 210
 211    /* _NEW_TEXTURE */
 212    brw_populate_sampler_prog_key_data(ctx, &gp->program, &key->tex);
 213 }
 214
 215 void
 216 brw_upload_gs_prog(struct brw_context *brw)
 217 {
 218    struct gl_context *ctx = &brw->ctx;
 219    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 220    struct brw_stage_state *stage_state = &brw->gs.base;
 221    struct brw_gs_prog_key key;
 222    /* BRW_NEW_GEOMETRY_PROGRAM */
 223    struct brw_program *gp = (struct brw_program *) brw->geometry_program;
 224
 225    if (!brw_gs_state_dirty(brw))
 226       return;
 227
 228    if (gp == NULL) {
 229       /* No geometry shader.  Vertex data just passes straight through. */
 230       if (brw->gen == 6 &&
 231           (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
 232          gen6_brw_upload_ff_gs_prog(brw);
 233          return;
 234       }
 235
 236       /* Other state atoms had better not try to access prog_data, since
 237        * there's no GS program.
 238        */
 239       brw->gs.base.prog_data = NULL;
 240
 241       return;
 242    }
 243
 244    brw_gs_populate_key(brw, &key);
 245
 246    if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
 247                          &key, sizeof(key),
 248                          &stage_state->prog_offset,
 249                          &brw->gs.base.prog_data)) {
 250       bool success = brw_codegen_gs_prog(brw, current[MESA_SHADER_GEOMETRY],
 251                                          gp, &key);
 252       assert(success);
 253       (void)success;
 254    }
 255 }
 256
 257 bool
 258 brw_gs_precompile(struct gl_context *ctx,
 259                   struct gl_shader_program *shader_prog,
 260                   struct gl_program *prog)
 261 {
 262    struct brw_context *brw = brw_context(ctx);
 263    struct brw_gs_prog_key key;
 264    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 265    struct brw_stage_prog_data *old_prog_data = brw->gs.base.prog_data;
 266    bool success;
 267
 268    struct brw_program *bgp = brw_program(prog);
 269
 270    memset(&key, 0, sizeof(key));
 271
 272    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 273    key.program_string_id = bgp->id;
 274
 275    success = brw_codegen_gs_prog(brw, shader_prog, bgp, &key);
 276
 277    brw->gs.base.prog_offset = old_prog_offset;
 278    brw->gs.base.prog_data = old_prog_data;
 279
 280    return success;
 281 }