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