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