src/mesa/drivers/dri/i965/brw_cs.c

   1 /*
   2  * Copyright (c) 2014 - 2015 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 #include "util/ralloc.h"
  25 #include "brw_context.h"
  26 #include "brw_cs.h"
  27 #include "brw_eu.h"
  28 #include "brw_wm.h"
  29 #include "brw_shader.h"
  30 #include "intel_mipmap_tree.h"
  31 #include "brw_state.h"
  32 #include "intel_batchbuffer.h"
  33 #include "brw_nir.h"
  34 #include "brw_program.h"
  35
  36 static void
  37 assign_cs_binding_table_offsets(const struct brw_device_info *devinfo,
  38                                 const struct gl_shader_program *shader_prog,
  39                                 const struct gl_program *prog,
  40                                 struct brw_cs_prog_data *prog_data)
  41 {
  42    uint32_t next_binding_table_offset = 0;
  43
  44    /* May not be used if the gl_NumWorkGroups variable is not accessed. */
  45    prog_data->binding_table.work_groups_start = next_binding_table_offset;
  46    next_binding_table_offset++;
  47
  48    brw_assign_common_binding_table_offsets(MESA_SHADER_COMPUTE, devinfo,
  49                                            shader_prog, prog, &prog_data->base,
  50                                            next_binding_table_offset);
  51 }
  52
  53 static bool
  54 brw_codegen_cs_prog(struct brw_context *brw,
  55                     struct gl_shader_program *prog,
  56                     struct brw_compute_program *cp,
  57                     struct brw_cs_prog_key *key)
  58 {
  59    struct gl_context *ctx = &brw->ctx;
  60    const GLuint *program;
  61    void *mem_ctx = ralloc_context(NULL);
  62    GLuint program_size;
  63    struct brw_cs_prog_data prog_data;
  64    bool start_busy = false;
  65    double start_time = 0;
  66
  67    struct brw_shader *cs =
  68       (struct brw_shader *) prog->_LinkedShaders[MESA_SHADER_COMPUTE];
  69    assert (cs);
  70
  71    memset(&prog_data, 0, sizeof(prog_data));
  72
  73    assign_cs_binding_table_offsets(brw->intelScreen->devinfo, prog,
  74                                    &cp->program.Base, &prog_data);
  75
  76    /* Allocate the references to the uniforms that will end up in the
  77     * prog_data associated with the compiled program, and which will be freed
  78     * by the state cache.
  79     */
  80    int param_count = cp->program.Base.nir->num_uniforms;
  81
  82    /* The backend also sometimes adds params for texture size. */
  83    param_count += 2 * ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
  84    prog_data.base.param =
  85       rzalloc_array(NULL, const gl_constant_value *, param_count);
  86    prog_data.base.pull_param =
  87       rzalloc_array(NULL, const gl_constant_value *, param_count);
  88    prog_data.base.image_param =
  89       rzalloc_array(NULL, struct brw_image_param, cs->base.NumImages);
  90    prog_data.base.nr_params = param_count;
  91    prog_data.base.nr_image_params = cs->base.NumImages;
  92
  93    brw_nir_setup_glsl_uniforms(cp->program.Base.nir, prog, &cp->program.Base,
  94                                &prog_data.base, true);
  95
  96    if (unlikely(brw->perf_debug)) {
  97       start_busy = (brw->batch.last_bo &&
  98                     drm_intel_bo_busy(brw->batch.last_bo));
  99       start_time = get_time();
 100    }
 101
 102    if (unlikely(INTEL_DEBUG & DEBUG_CS))
 103       brw_dump_ir("compute", prog, &cs->base, &cp->program.Base);
 104
 105    int st_index = -1;
 106    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 107       st_index = brw_get_shader_time_index(brw, prog, &cp->program.Base, ST_CS);
 108
 109    char *error_str;
 110    program = brw_compile_cs(brw->intelScreen->compiler, brw, mem_ctx,
 111                             key, &prog_data, cp->program.Base.nir,
 112                             st_index, &program_size, &error_str);
 113    if (program == NULL) {
 114       prog->LinkStatus = false;
 115       ralloc_strcat(&prog->InfoLog, error_str);
 116       _mesa_problem(NULL, "Failed to compile compute shader: %s\n", error_str);
 117
 118       ralloc_free(mem_ctx);
 119       return false;
 120    }
 121
 122    if (unlikely(brw->perf_debug) && cs) {
 123       if (cs->compiled_once) {
 124          _mesa_problem(&brw->ctx, "CS programs shouldn't need recompiles");
 125       }
 126       cs->compiled_once = true;
 127
 128       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 129          perf_debug("CS compile took %.03f ms and stalled the GPU\n",
 130                     (get_time() - start_time) * 1000);
 131       }
 132    }
 133
 134    if (prog_data.base.total_scratch) {
 135       brw_get_scratch_bo(brw, &brw->cs.base.scratch_bo,
 136                          prog_data.base.total_scratch * brw->max_cs_threads);
 137    }
 138
 139    if (unlikely(INTEL_DEBUG & DEBUG_CS))
 140       fprintf(stderr, "\n");
 141
 142    brw_upload_cache(&brw->cache, BRW_CACHE_CS_PROG,
 143                     key, sizeof(*key),
 144                     program, program_size,
 145                     &prog_data, sizeof(prog_data),
 146                     &brw->cs.base.prog_offset, &brw->cs.prog_data);
 147    ralloc_free(mem_ctx);
 148
 149    return true;
 150 }
 151
 152
 153 static void
 154 brw_cs_populate_key(struct brw_context *brw, struct brw_cs_prog_key *key)
 155 {
 156    struct gl_context *ctx = &brw->ctx;
 157    /* BRW_NEW_COMPUTE_PROGRAM */
 158    const struct brw_compute_program *cp =
 159       (struct brw_compute_program *) brw->compute_program;
 160    const struct gl_program *prog = (struct gl_program *) cp;
 161
 162    memset(key, 0, sizeof(*key));
 163
 164    /* _NEW_TEXTURE */
 165    brw_populate_sampler_prog_key_data(ctx, prog, brw->cs.base.sampler_count,
 166                                       &key->tex);
 167
 168    /* The unique compute program ID */
 169    key->program_string_id = cp->id;
 170 }
 171
 172
 173 void
 174 brw_upload_cs_prog(struct brw_context *brw)
 175 {
 176    struct gl_context *ctx = &brw->ctx;
 177    struct brw_cs_prog_key key;
 178    struct brw_compute_program *cp = (struct brw_compute_program *)
 179       brw->compute_program;
 180
 181    if (!cp)
 182       return;
 183
 184    if (!brw_state_dirty(brw, _NEW_TEXTURE, BRW_NEW_COMPUTE_PROGRAM))
 185       return;
 186
 187    brw->cs.base.sampler_count =
 188       _mesa_fls(ctx->ComputeProgram._Current->Base.SamplersUsed);
 189
 190    brw_cs_populate_key(brw, &key);
 191
 192    if (!brw_search_cache(&brw->cache, BRW_CACHE_CS_PROG,
 193                          &key, sizeof(key),
 194                          &brw->cs.base.prog_offset, &brw->cs.prog_data)) {
 195       bool success =
 196          brw_codegen_cs_prog(brw,
 197                              ctx->Shader.CurrentProgram[MESA_SHADER_COMPUTE],
 198                              cp, &key);
 199       (void) success;
 200       assert(success);
 201    }
 202    brw->cs.base.prog_data = &brw->cs.prog_data->base;
 203 }
 204
 205
 206 bool
 207 brw_cs_precompile(struct gl_context *ctx,
 208                   struct gl_shader_program *shader_prog,
 209                   struct gl_program *prog)
 210 {
 211    struct brw_context *brw = brw_context(ctx);
 212    struct brw_cs_prog_key key;
 213
 214    struct gl_compute_program *cp = (struct gl_compute_program *) prog;
 215    struct brw_compute_program *bcp = brw_compute_program(cp);
 216
 217    memset(&key, 0, sizeof(key));
 218    key.program_string_id = bcp->id;
 219
 220    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 221
 222    uint32_t old_prog_offset = brw->cs.base.prog_offset;
 223    struct brw_cs_prog_data *old_prog_data = brw->cs.prog_data;
 224
 225    bool success = brw_codegen_cs_prog(brw, shader_prog, bcp, &key);
 226
 227    brw->cs.base.prog_offset = old_prog_offset;
 228    brw->cs.prog_data = old_prog_data;
 229
 230    return success;
 231 }