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_state.h"
  33 #include "brw_ff_gs.h"
  34 #include "compiler/brw_nir.h"
  35 #include "brw_program.h"
  36 #include "compiler/glsl/ir_uniform.h"
  37
  38 static void
  39 assign_gs_binding_table_offsets(const struct gen_device_info *devinfo,
  40                                 const struct gl_program *prog,
  41                                 struct brw_gs_prog_data *prog_data)
  42 {
  43    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
  44     * feedback surfaces.
  45     */
  46    uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
  47
  48    brw_assign_common_binding_table_offsets(devinfo, prog,
  49                                            &prog_data->base.base, reserved);
  50 }
  51
  52 static bool
  53 brw_codegen_gs_prog(struct brw_context *brw,
  54                     struct brw_program *gp,
  55                     struct brw_gs_prog_key *key)
  56 {
  57    struct brw_compiler *compiler = brw->screen->compiler;
  58    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  59    struct brw_stage_state *stage_state = &brw->gs.base;
  60    struct brw_gs_prog_data prog_data;
  61    bool start_busy = false;
  62    double start_time = 0;
  63
  64    memset(&prog_data, 0, sizeof(prog_data));
  65
  66    void *mem_ctx = ralloc_context(NULL);
  67
  68    nir_shader *nir = nir_shader_clone(mem_ctx, gp->program.nir);
  69
  70    assign_gs_binding_table_offsets(devinfo, &gp->program, &prog_data);
  71
  72    brw_nir_setup_glsl_uniforms(mem_ctx, nir, &gp->program,
  73                                &prog_data.base.base,
  74                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
  75    brw_nir_analyze_ubo_ranges(compiler, nir, NULL,
  76                               prog_data.base.base.ubo_ranges);
  77
  78    uint64_t outputs_written = nir->info.outputs_written;
  79
  80    brw_compute_vue_map(devinfo,
  81                        &prog_data.base.vue_map, outputs_written,
  82                        gp->program.info.separate_shader, 1);
  83
  84    int st_index = -1;
  85    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
  86       st_index = brw_get_shader_time_index(brw, &gp->program, ST_GS, true);
  87
  88    if (unlikely(brw->perf_debug)) {
  89       start_busy = brw->batch.last_bo && brw_bo_busy(brw->batch.last_bo);
  90       start_time = get_time();
  91    }
  92
  93    char *error_str;
  94    const unsigned *program =
  95       brw_compile_gs(brw->screen->compiler, brw, mem_ctx, key,
  96                      &prog_data, nir, &gp->program, st_index,
  97                      NULL, &error_str);
  98    if (program == NULL) {
  99       ralloc_strcat(&gp->program.sh.data->InfoLog, error_str);
 100       _mesa_problem(NULL, "Failed to compile geometry shader: %s\n", error_str);
 101
 102       ralloc_free(mem_ctx);
 103       return false;
 104    }
 105
 106    if (unlikely(brw->perf_debug)) {
 107       if (gp->compiled_once) {
 108          brw_debug_recompile(brw, MESA_SHADER_GEOMETRY, gp->program.Id,
 109                              &key->base);
 110       }
 111       if (start_busy && !brw_bo_busy(brw->batch.last_bo)) {
 112          perf_debug("GS compile took %.03f ms and stalled the GPU\n",
 113                     (get_time() - start_time) * 1000);
 114       }
 115       gp->compiled_once = true;
 116    }
 117
 118    /* Scratch space is used for register spilling */
 119    brw_alloc_stage_scratch(brw, stage_state,
 120                            prog_data.base.base.total_scratch);
 121
 122    /* The param and pull_param arrays will be freed by the shader cache. */
 123    ralloc_steal(NULL, prog_data.base.base.param);
 124    ralloc_steal(NULL, prog_data.base.base.pull_param);
 125    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 126                     key, sizeof(*key),
 127                     program, prog_data.base.base.program_size,
 128                     &prog_data, sizeof(prog_data),
 129                     &stage_state->prog_offset, &brw->gs.base.prog_data);
 130    ralloc_free(mem_ctx);
 131
 132    return true;
 133 }
 134
 135 static bool
 136 brw_gs_state_dirty(const struct brw_context *brw)
 137 {
 138    return brw_state_dirty(brw,
 139                           _NEW_TEXTURE,
 140                           BRW_NEW_GEOMETRY_PROGRAM |
 141                           BRW_NEW_TRANSFORM_FEEDBACK);
 142 }
 143
 144 void
 145 brw_gs_populate_key(struct brw_context *brw,
 146                     struct brw_gs_prog_key *key)
 147 {
 148    struct gl_context *ctx = &brw->ctx;
 149    struct brw_program *gp =
 150       (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
 151
 152    memset(key, 0, sizeof(*key));
 153
 154    brw_populate_base_prog_key(ctx, gp, &key->base);
 155 }
 156
 157 void
 158 brw_upload_gs_prog(struct brw_context *brw)
 159 {
 160    struct brw_stage_state *stage_state = &brw->gs.base;
 161    struct brw_gs_prog_key key;
 162    /* BRW_NEW_GEOMETRY_PROGRAM */
 163    struct brw_program *gp =
 164       (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
 165
 166    if (!brw_gs_state_dirty(brw))
 167       return;
 168
 169    brw_gs_populate_key(brw, &key);
 170
 171    if (brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG, &key, sizeof(key),
 172                         &stage_state->prog_offset, &brw->gs.base.prog_data,
 173                         true))
 174       return;
 175
 176    if (brw_disk_cache_upload_program(brw, MESA_SHADER_GEOMETRY))
 177       return;
 178
 179    gp = (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
 180    gp->id = key.base.program_string_id;
 181
 182    ASSERTED bool success = brw_codegen_gs_prog(brw, gp, &key);
 183    assert(success);
 184 }
 185
 186 void
 187 brw_gs_populate_default_key(const struct brw_compiler *compiler,
 188                             struct brw_gs_prog_key *key,
 189                             struct gl_program *prog)
 190 {
 191    const struct gen_device_info *devinfo = compiler->devinfo;
 192
 193    memset(key, 0, sizeof(*key));
 194
 195    brw_populate_default_base_prog_key(devinfo, brw_program(prog),
 196                                       &key->base);
 197 }
 198
 199 bool
 200 brw_gs_precompile(struct gl_context *ctx, struct gl_program *prog)
 201 {
 202    struct brw_context *brw = brw_context(ctx);
 203    struct brw_gs_prog_key key;
 204    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 205    struct brw_stage_prog_data *old_prog_data = brw->gs.base.prog_data;
 206    bool success;
 207
 208    struct brw_program *bgp = brw_program(prog);
 209
 210    brw_gs_populate_default_key(brw->screen->compiler, &key, prog);
 211
 212    success = brw_codegen_gs_prog(brw, bgp, &key);
 213
 214    brw->gs.base.prog_offset = old_prog_offset;
 215    brw->gs.base.prog_data = old_prog_data;
 216
 217    return success;
 218 }