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;
  79    if (!compiler->scalar_stage[MESA_SHADER_GEOMETRY])
  80       param_count *= 4;
  81
  82    prog_data.base.base.param =
  83       rzalloc_array(NULL, const gl_constant_value *, param_count);
  84    prog_data.base.base.pull_param =
  85       rzalloc_array(NULL, const gl_constant_value *, param_count);
  86    prog_data.base.base.image_param =
  87       rzalloc_array(NULL, struct brw_image_param, gs->NumImages);
  88    prog_data.base.base.nr_params = param_count;
  89    prog_data.base.base.nr_image_params = gs->NumImages;
  90
  91    brw_nir_setup_glsl_uniforms(gp->program.Base.nir, prog, &gp->program.Base,
  92                                &prog_data.base.base,
  93                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
  94
  95    GLbitfield64 outputs_written = gp->program.Base.OutputsWritten;
  96
  97    brw_compute_vue_map(brw->intelScreen->devinfo,
  98                        &prog_data.base.vue_map, outputs_written,
  99                        prog ? prog->SeparateShader : false);
 100
 101    if (unlikely(INTEL_DEBUG & DEBUG_GS))
 102       brw_dump_ir("geometry", prog, gs, NULL);
 103
 104    int st_index = -1;
 105    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 106       st_index = brw_get_shader_time_index(brw, prog, NULL, ST_GS);
 107
 108    void *mem_ctx = ralloc_context(NULL);
 109    unsigned program_size;
 110    char *error_str;
 111    const unsigned *program =
 112       brw_compile_gs(brw->intelScreen->compiler, brw, mem_ctx, key,
 113                      &prog_data, shader->Program->nir, prog,
 114                      st_index, &program_size, &error_str);
 115    if (program == NULL) {
 116       ralloc_free(mem_ctx);
 117       return false;
 118    }
 119
 120    /* Scratch space is used for register spilling */
 121    if (prog_data.base.base.total_scratch) {
 122       brw_get_scratch_bo(brw, &stage_state->scratch_bo,
 123                          prog_data.base.base.total_scratch *
 124                          brw->max_gs_threads);
 125    }
 126
 127    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
 128                     key, sizeof(*key),
 129                     program, program_size,
 130                     &prog_data, sizeof(prog_data),
 131                     &stage_state->prog_offset, &brw->gs.prog_data);
 132    ralloc_free(mem_ctx);
 133
 134    return true;
 135 }
 136
 137 static bool
 138 brw_gs_state_dirty(struct brw_context *brw)
 139 {
 140    return brw_state_dirty(brw,
 141                           _NEW_TEXTURE,
 142                           BRW_NEW_GEOMETRY_PROGRAM |
 143                           BRW_NEW_TRANSFORM_FEEDBACK);
 144 }
 145
 146 static void
 147 brw_gs_populate_key(struct brw_context *brw,
 148                     struct brw_gs_prog_key *key)
 149 {
 150    struct gl_context *ctx = &brw->ctx;
 151    struct brw_stage_state *stage_state = &brw->gs.base;
 152    struct brw_geometry_program *gp =
 153       (struct brw_geometry_program *) brw->geometry_program;
 154    struct gl_program *prog = &gp->program.Base;
 155
 156    memset(key, 0, sizeof(*key));
 157
 158    key->program_string_id = gp->id;
 159
 160    /* _NEW_TEXTURE */
 161    brw_populate_sampler_prog_key_data(ctx, prog, stage_state->sampler_count,
 162                                       &key->tex);
 163 }
 164
 165 void
 166 brw_upload_gs_prog(struct brw_context *brw)
 167 {
 168    struct gl_context *ctx = &brw->ctx;
 169    struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
 170    struct brw_stage_state *stage_state = &brw->gs.base;
 171    struct brw_gs_prog_key key;
 172    /* BRW_NEW_GEOMETRY_PROGRAM */
 173    struct brw_geometry_program *gp =
 174       (struct brw_geometry_program *) brw->geometry_program;
 175
 176    if (!brw_gs_state_dirty(brw))
 177       return;
 178
 179    if (gp == NULL) {
 180       /* No geometry shader.  Vertex data just passes straight through. */
 181       if (brw->gen == 6 &&
 182           (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
 183          gen6_brw_upload_ff_gs_prog(brw);
 184          return;
 185       }
 186
 187       /* Other state atoms had better not try to access prog_data, since
 188        * there's no GS program.
 189        */
 190       brw->gs.prog_data = NULL;
 191       brw->gs.base.prog_data = NULL;
 192
 193       return;
 194    }
 195
 196    brw_gs_populate_key(brw, &key);
 197
 198    if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
 199                          &key, sizeof(key),
 200                          &stage_state->prog_offset, &brw->gs.prog_data)) {
 201       bool success = brw_codegen_gs_prog(brw, current[MESA_SHADER_GEOMETRY],
 202                                          gp, &key);
 203       assert(success);
 204       (void)success;
 205    }
 206    brw->gs.base.prog_data = &brw->gs.prog_data->base.base;
 207 }
 208
 209 bool
 210 brw_gs_precompile(struct gl_context *ctx,
 211                   struct gl_shader_program *shader_prog,
 212                   struct gl_program *prog)
 213 {
 214    struct brw_context *brw = brw_context(ctx);
 215    struct brw_gs_prog_key key;
 216    uint32_t old_prog_offset = brw->gs.base.prog_offset;
 217    struct brw_gs_prog_data *old_prog_data = brw->gs.prog_data;
 218    bool success;
 219
 220    struct gl_geometry_program *gp = (struct gl_geometry_program *) prog;
 221    struct brw_geometry_program *bgp = brw_geometry_program(gp);
 222
 223    memset(&key, 0, sizeof(key));
 224
 225    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 226    key.program_string_id = bgp->id;
 227
 228    success = brw_codegen_gs_prog(brw, shader_prog, bgp, &key);
 229
 230    brw->gs.base.prog_offset = old_prog_offset;
 231    brw->gs.prog_data = old_prog_data;
 232
 233    return success;
 234 }