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 brw_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_geometry_program *gp,
  98                     struct brw_gs_prog_key *key)
  99 {
 100    struct brw_compiler *compiler = brw->intelScreen->compiler;
 101    struct gl_shader *shader = prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
 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(brw->intelScreen->devinfo, prog,
 110                                    &gp->program.Base, &prog_data);
 111
 112    /* Allocate the references to the uniforms that will end up in the
 113     * prog_data associated with the compiled program, and which will be freed
 114     * by the state cache.
 115     *
 116     * Note: param_count needs to be num_uniform_components * 4, since we add
 117     * padding around uniform values below vec4 size, so the worst case is that
 118     * every uniform is a float which gets padded to the size of a vec4.
 119     */
 120    struct gl_shader *gs = prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
 121    struct brw_shader *bgs = (struct brw_shader *) gs;
 122    int param_count = gp->program.Base.nir->num_uniforms;
 123    if (!compiler->scalar_stage[MESA_SHADER_GEOMETRY])
 124       param_count *= 4;
 125
 126    prog_data.base.base.param =
 127       rzalloc_array(NULL, const gl_constant_value *, param_count);
 128    prog_data.base.base.pull_param =
 129       rzalloc_array(NULL, const gl_constant_value *, param_count);
 130    prog_data.base.base.image_param =
 131       rzalloc_array(NULL, struct brw_image_param, gs->NumImages);
 132    prog_data.base.base.nr_params = param_count;
 133    prog_data.base.base.nr_image_params = gs->NumImages;
 134
 135    brw_nir_setup_glsl_uniforms(gp->program.Base.nir, prog, &gp->program.Base,
 136                                &prog_data.base.base,
 137                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
 138
 139    GLbitfield64 outputs_written = gp->program.Base.OutputsWritten;
 140
 141    prog_data.base.cull_distance_mask =
 142       ((1 << gp->program.Base.CullDistanceArraySize) - 1) <<
 143       gp->program.Base.ClipDistanceArraySize;
 144
 145    brw_compute_vue_map(brw->intelScreen->devinfo,
 146                        &prog_data.base.vue_map, outputs_written,
 147                        prog->SeparateShader);
 148
 149    if (unlikely(INTEL_DEBUG & DEBUG_GS))
 150       brw_dump_ir("geometry", prog, gs, NULL);
 151
 152    int st_index = -1;
 153    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 154       st_index = brw_get_shader_time_index(brw, prog, NULL, ST_GS);
 155
 156    if (unlikely(brw->perf_debug)) {
 157       start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
 158       start_time = get_time();
 159    }
 160
 161    void *mem_ctx = ralloc_context(NULL);
 162    unsigned program_size;
 163    char *error_str;
 164    const unsigned *program =
 165       brw_compile_gs(brw->intelScreen->compiler, brw, mem_ctx, key,
 166                      &prog_data, shader->Program->nir, prog,
 167                      st_index, &program_size, &error_str);
 168    if (program == NULL) {
 169       ralloc_free(mem_ctx);
 170       return false;
 171    }
 172
 173    if (unlikely(brw->perf_debug)) {
 174       if (bgs->compiled_once) {
 175          brw_gs_debug_recompile(brw, prog, key);
 176       }
 177       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 178          perf_debug("GS compile took %.03f ms and stalled the GPU\n",
 179                     (get_time() - start_time) * 1000);
 180       }
 181       bgs->compiled_once = true;
 182    }
 183
 184    /* Scratch space is used for register spilling */
 185    if (prog_data.base.base.total_scratch) {
 186       brw_get_scratch_bo(brw, &stage_state->scratch_bo,
 187                          prog_data.base.base.total_scratch *
 188                          brw->max_gs_threads);
 189    }
 190
 191    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 192                     key, sizeof(*key),
 193                     program, program_size,
 194                     &prog_data, sizeof(prog_data),
 195                     &stage_state->prog_offset, &brw->gs.prog_data);
 196    ralloc_free(mem_ctx);
 197
 198    return true;
 199 }
 200
 201 static bool
 202 brw_gs_state_dirty(const struct brw_context *brw)
 203 {
 204    return brw_state_dirty(brw,
 205                           _NEW_TEXTURE,
 206                           BRW_NEW_GEOMETRY_PROGRAM |
 207                           BRW_NEW_TRANSFORM_FEEDBACK);
 208 }
 209
 210 static void
 211 brw_gs_populate_key(struct brw_context *brw,
 212                     struct brw_gs_prog_key *key)
 213 {
 214    struct gl_context *ctx = &brw->ctx;
 215    struct brw_stage_state *stage_state = &brw->gs.base;
 216    struct brw_geometry_program *gp =
 217       (struct brw_geometry_program *) brw->geometry_program;
 218    struct gl_program *prog = &gp->program.Base;
 219
 220    memset(key, 0, sizeof(*key));
 221
 222    key->program_string_id = gp->id;
 223
 224    /* _NEW_TEXTURE */
 225    brw_populate_sampler_prog_key_data(ctx, prog, stage_state->sampler_count,
 226                                       &key->tex);
 227 }
 228
 229 void
 230 brw_upload_gs_prog(struct brw_context *brw)
 231 {
 232    struct gl_context *ctx = &brw->ctx;
 233    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 234    struct brw_stage_state *stage_state = &brw->gs.base;
 235    struct brw_gs_prog_key key;
 236    /* BRW_NEW_GEOMETRY_PROGRAM */
 237    struct brw_geometry_program *gp =
 238       (struct brw_geometry_program *) brw->geometry_program;
 239
 240    if (!brw_gs_state_dirty(brw))
 241       return;
 242
 243    if (gp == NULL) {
 244       /* No geometry shader.  Vertex data just passes straight through. */
 245       if (brw->gen == 6 &&
 246           (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
 247          gen6_brw_upload_ff_gs_prog(brw);
 248          return;
 249       }
 250
 251       /* Other state atoms had better not try to access prog_data, since
 252        * there's no GS program.
 253        */
 254       brw->gs.prog_data = NULL;
 255       brw->gs.base.prog_data = NULL;
 256
 257       return;
 258    }
 259
 260    brw_gs_populate_key(brw, &key);
 261
 262    if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
 263                          &key, sizeof(key),
 264                          &stage_state->prog_offset, &brw->gs.prog_data)) {
 265       bool success = brw_codegen_gs_prog(brw, current[MESA_SHADER_GEOMETRY],
 266                                          gp, &key);
 267       assert(success);
 268       (void)success;
 269    }
 270    brw->gs.base.prog_data = &brw->gs.prog_data->base.base;
 271 }
 272
 273 bool
 274 brw_gs_precompile(struct gl_context *ctx,
 275                   struct gl_shader_program *shader_prog,
 276                   struct gl_program *prog)
 277 {
 278    struct brw_context *brw = brw_context(ctx);
 279    struct brw_gs_prog_key key;
 280    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 281    struct brw_gs_prog_data *old_prog_data = brw->gs.prog_data;
 282    bool success;
 283
 284    struct gl_geometry_program *gp = (struct gl_geometry_program *) prog;
 285    struct brw_geometry_program *bgp = brw_geometry_program(gp);
 286
 287    memset(&key, 0, sizeof(key));
 288
 289    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 290    key.program_string_id = bgp->id;
 291
 292    success = brw_codegen_gs_prog(brw, shader_prog, bgp, &key);
 293
 294    brw->gs.base.prog_offset = old_prog_offset;
 295    brw->gs.prog_data = old_prog_data;
 296
 297    return success;
 298 }