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 "glsl/ir_uniform.h"
  38
  39 static void
  40 assign_gs_binding_table_offsets(const struct brw_device_info *devinfo,
  41                                 const struct gl_shader_program *shader_prog,
  42                                 const struct gl_program *prog,
  43                                 struct brw_gs_prog_data *prog_data)
  44 {
  45    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
  46     * feedback surfaces.
  47     */
  48    uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
  49
  50    brw_assign_common_binding_table_offsets(MESA_SHADER_GEOMETRY, devinfo,
  51                                            shader_prog, prog,
  52                                            &prog_data->base.base,
  53                                            reserved);
  54 }
  55
  56 bool
  57 brw_codegen_gs_prog(struct brw_context *brw,
  58                     struct gl_shader_program *prog,
  59                     struct brw_geometry_program *gp,
  60                     struct brw_gs_prog_key *key)
  61 {
  62    struct brw_compiler *compiler = brw->intelScreen->compiler;
  63    struct gl_shader *shader = prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
  64    struct brw_stage_state *stage_state = &brw->gs.base;
  65    struct brw_gs_prog_data prog_data;
  66    memset(&prog_data, 0, sizeof(prog_data));
  67
  68    assign_gs_binding_table_offsets(brw->intelScreen->devinfo, prog,
  69                                    &gp->program.Base, &prog_data);
  70
  71    /* Allocate the references to the uniforms that will end up in the
  72     * prog_data associated with the compiled program, and which will be freed
  73     * by the state cache.
  74     *
  75     * Note: param_count needs to be num_uniform_components * 4, since we add
  76     * padding around uniform values below vec4 size, so the worst case is that
  77     * every uniform is a float which gets padded to the size of a vec4.
  78     */
  79    struct gl_shader *gs = prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
  80    int param_count = gp->program.Base.nir->num_uniforms;
  81    if (!compiler->scalar_stage[MESA_SHADER_GEOMETRY])
  82       param_count *= 4;
  83
  84    prog_data.base.base.param =
  85       rzalloc_array(NULL, const gl_constant_value *, param_count);
  86    prog_data.base.base.pull_param =
  87       rzalloc_array(NULL, const gl_constant_value *, param_count);
  88    prog_data.base.base.image_param =
  89       rzalloc_array(NULL, struct brw_image_param, gs->NumImages);
  90    prog_data.base.base.nr_params = param_count;
  91    prog_data.base.base.nr_image_params = gs->NumImages;
  92
  93    brw_nir_setup_glsl_uniforms(gp->program.Base.nir, prog, &gp->program.Base,
  94                                &prog_data.base.base,
  95                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
  96
  97    GLbitfield64 outputs_written = gp->program.Base.OutputsWritten;
  98
  99    brw_compute_vue_map(brw->intelScreen->devinfo,
 100                        &prog_data.base.vue_map, outputs_written,
 101                        prog ? prog->SeparateShader : false);
 102
 103    if (unlikely(INTEL_DEBUG & DEBUG_GS))
 104       brw_dump_ir("geometry", prog, gs, NULL);
 105
 106    int st_index = -1;
 107    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 108       st_index = brw_get_shader_time_index(brw, prog, NULL, ST_GS);
 109
 110    void *mem_ctx = ralloc_context(NULL);
 111    unsigned program_size;
 112    char *error_str;
 113    const unsigned *program =
 114       brw_compile_gs(brw->intelScreen->compiler, brw, mem_ctx, key,
 115                      &prog_data, shader->Program->nir, prog,
 116                      st_index, &program_size, &error_str);
 117    if (program == NULL) {
 118       ralloc_free(mem_ctx);
 119       return false;
 120    }
 121
 122    /* Scratch space is used for register spilling */
 123    if (prog_data.base.base.total_scratch) {
 124       brw_get_scratch_bo(brw, &stage_state->scratch_bo,
 125                          prog_data.base.base.total_scratch *
 126                          brw->max_gs_threads);
 127    }
 128
 129    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 130                     key, sizeof(*key),
 131                     program, program_size,
 132                     &prog_data, sizeof(prog_data),
 133                     &stage_state->prog_offset, &brw->gs.prog_data);
 134    ralloc_free(mem_ctx);
 135
 136    return true;
 137 }
 138
 139 static bool
 140 brw_gs_state_dirty(struct brw_context *brw)
 141 {
 142    return brw_state_dirty(brw,
 143                           _NEW_TEXTURE,
 144                           BRW_NEW_GEOMETRY_PROGRAM |
 145                           BRW_NEW_TRANSFORM_FEEDBACK);
 146 }
 147
 148 static void
 149 brw_gs_populate_key(struct brw_context *brw,
 150                     struct brw_gs_prog_key *key)
 151 {
 152    struct gl_context *ctx = &brw->ctx;
 153    struct brw_stage_state *stage_state = &brw->gs.base;
 154    struct brw_geometry_program *gp =
 155       (struct brw_geometry_program *) brw->geometry_program;
 156    struct gl_program *prog = &gp->program.Base;
 157
 158    memset(key, 0, sizeof(*key));
 159
 160    key->program_string_id = gp->id;
 161
 162    /* _NEW_TEXTURE */
 163    brw_populate_sampler_prog_key_data(ctx, prog, stage_state->sampler_count,
 164                                       &key->tex);
 165 }
 166
 167 void
 168 brw_upload_gs_prog(struct brw_context *brw)
 169 {
 170    struct gl_context *ctx = &brw->ctx;
 171    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 172    struct brw_stage_state *stage_state = &brw->gs.base;
 173    struct brw_gs_prog_key key;
 174    /* BRW_NEW_GEOMETRY_PROGRAM */
 175    struct brw_geometry_program *gp =
 176       (struct brw_geometry_program *) brw->geometry_program;
 177
 178    if (!brw_gs_state_dirty(brw))
 179       return;
 180
 181    if (gp == NULL) {
 182       /* No geometry shader.  Vertex data just passes straight through. */
 183       if (brw->gen == 6 &&
 184           (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
 185          gen6_brw_upload_ff_gs_prog(brw);
 186          return;
 187       }
 188
 189       /* Other state atoms had better not try to access prog_data, since
 190        * there's no GS program.
 191        */
 192       brw->gs.prog_data = NULL;
 193       brw->gs.base.prog_data = NULL;
 194
 195       return;
 196    }
 197
 198    brw_gs_populate_key(brw, &key);
 199
 200    if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
 201                          &key, sizeof(key),
 202                          &stage_state->prog_offset, &brw->gs.prog_data)) {
 203       bool success = brw_codegen_gs_prog(brw, current[MESA_SHADER_GEOMETRY],
 204                                          gp, &key);
 205       assert(success);
 206       (void)success;
 207    }
 208    brw->gs.base.prog_data = &brw->gs.prog_data->base.base;
 209 }
 210
 211 bool
 212 brw_gs_precompile(struct gl_context *ctx,
 213                   struct gl_shader_program *shader_prog,
 214                   struct gl_program *prog)
 215 {
 216    struct brw_context *brw = brw_context(ctx);
 217    struct brw_gs_prog_key key;
 218    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 219    struct brw_gs_prog_data *old_prog_data = brw->gs.prog_data;
 220    bool success;
 221
 222    struct gl_geometry_program *gp = (struct gl_geometry_program *) prog;
 223    struct brw_geometry_program *bgp = brw_geometry_program(gp);
 224
 225    memset(&key, 0, sizeof(key));
 226
 227    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 228    key.program_string_id = bgp->id;
 229
 230    success = brw_codegen_gs_prog(brw, shader_prog, bgp, &key);
 231
 232    brw->gs.base.prog_offset = old_prog_offset;
 233    brw->gs.prog_data = old_prog_data;
 234
 235    return success;
 236 }