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 void
  37 brw_cs_fill_local_id_payload(const struct brw_cs_prog_data *prog_data,
  38                              void *buffer, uint32_t threads, uint32_t stride)
  39 {
  40    if (prog_data->local_invocation_id_regs == 0)
  41       return;
  42
  43    /* 'stride' should be an integer number of registers, that is, a multiple
  44     * of 32 bytes.
  45     */
  46    assert(stride % 32 == 0);
  47
  48    unsigned x = 0, y = 0, z = 0;
  49    for (unsigned t = 0; t < threads; t++) {
  50       uint32_t *param = (uint32_t *) buffer + stride * t / 4;
  51
  52       for (unsigned i = 0; i < prog_data->simd_size; i++) {
  53          param[0 * prog_data->simd_size + i] = x;
  54          param[1 * prog_data->simd_size + i] = y;
  55          param[2 * prog_data->simd_size + i] = z;
  56
  57          x++;
  58          if (x == prog_data->local_size[0]) {
  59             x = 0;
  60             y++;
  61             if (y == prog_data->local_size[1]) {
  62                y = 0;
  63                z++;
  64                if (z == prog_data->local_size[2])
  65                   z = 0;
  66             }
  67          }
  68       }
  69    }
  70 }
  71
  72 static void
  73 assign_cs_binding_table_offsets(const struct brw_device_info *devinfo,
  74                                 const struct gl_shader_program *shader_prog,
  75                                 const struct gl_program *prog,
  76                                 struct brw_cs_prog_data *prog_data)
  77 {
  78    uint32_t next_binding_table_offset = 0;
  79
  80    /* May not be used if the gl_NumWorkGroups variable is not accessed. */
  81    prog_data->binding_table.work_groups_start = next_binding_table_offset;
  82    next_binding_table_offset++;
  83
  84    brw_assign_common_binding_table_offsets(MESA_SHADER_COMPUTE, devinfo,
  85                                            shader_prog, prog, &prog_data->base,
  86                                            next_binding_table_offset);
  87 }
  88
  89 static bool
  90 brw_codegen_cs_prog(struct brw_context *brw,
  91                     struct gl_shader_program *prog,
  92                     struct brw_compute_program *cp,
  93                     struct brw_cs_prog_key *key)
  94 {
  95    struct gl_context *ctx = &brw->ctx;
  96    const GLuint *program;
  97    void *mem_ctx = ralloc_context(NULL);
  98    GLuint program_size;
  99    struct brw_cs_prog_data prog_data;
 100    bool start_busy = false;
 101    double start_time = 0;
 102
 103    struct brw_shader *cs =
 104       (struct brw_shader *) prog->_LinkedShaders[MESA_SHADER_COMPUTE];
 105    assert (cs);
 106
 107    memset(&prog_data, 0, sizeof(prog_data));
 108
 109    assign_cs_binding_table_offsets(brw->intelScreen->devinfo, prog,
 110                                    &cp->program.Base, &prog_data);
 111
 112    /* Allocate the references to the uniforms that will end up in the
 113     * prog_data associated with the compiled program, and which will be freed
 114     * by the state cache.
 115     */
 116    int param_count = cp->program.Base.nir->num_uniforms;
 117
 118    /* The backend also sometimes adds params for texture size. */
 119    param_count += 2 * ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 120    prog_data.base.param =
 121       rzalloc_array(NULL, const gl_constant_value *, param_count);
 122    prog_data.base.pull_param =
 123       rzalloc_array(NULL, const gl_constant_value *, param_count);
 124    prog_data.base.image_param =
 125       rzalloc_array(NULL, struct brw_image_param, cs->base.NumImages);
 126    prog_data.base.nr_params = param_count;
 127    prog_data.base.nr_image_params = cs->base.NumImages;
 128
 129    brw_nir_setup_glsl_uniforms(cp->program.Base.nir, prog, &cp->program.Base,
 130                                &prog_data.base, true);
 131
 132    if (unlikely(brw->perf_debug)) {
 133       start_busy = (brw->batch.last_bo &&
 134                     drm_intel_bo_busy(brw->batch.last_bo));
 135       start_time = get_time();
 136    }
 137
 138    if (unlikely(INTEL_DEBUG & DEBUG_CS))
 139       brw_dump_ir("compute", prog, &cs->base, &cp->program.Base);
 140
 141    int st_index = -1;
 142    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 143       st_index = brw_get_shader_time_index(brw, prog, &cp->program.Base, ST_CS);
 144
 145    char *error_str;
 146    program = brw_compile_cs(brw->intelScreen->compiler, brw, mem_ctx,
 147                             key, &prog_data, cp->program.Base.nir,
 148                             st_index, &program_size, &error_str);
 149    if (program == NULL) {
 150       prog->LinkStatus = false;
 151       ralloc_strcat(&prog->InfoLog, error_str);
 152       _mesa_problem(NULL, "Failed to compile compute shader: %s\n", error_str);
 153
 154       ralloc_free(mem_ctx);
 155       return false;
 156    }
 157
 158    if (unlikely(brw->perf_debug) && cs) {
 159       if (cs->compiled_once) {
 160          _mesa_problem(&brw->ctx, "CS programs shouldn't need recompiles");
 161       }
 162       cs->compiled_once = true;
 163
 164       if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
 165          perf_debug("CS compile took %.03f ms and stalled the GPU\n",
 166                     (get_time() - start_time) * 1000);
 167       }
 168    }
 169
 170    if (prog_data.base.total_scratch) {
 171       brw_get_scratch_bo(brw, &brw->cs.base.scratch_bo,
 172                          prog_data.base.total_scratch * brw->max_cs_threads);
 173    }
 174
 175    if (unlikely(INTEL_DEBUG & DEBUG_CS))
 176       fprintf(stderr, "\n");
 177
 178    brw_upload_cache(&brw->cache, BRW_CACHE_CS_PROG,
 179                     key, sizeof(*key),
 180                     program, program_size,
 181                     &prog_data, sizeof(prog_data),
 182                     &brw->cs.base.prog_offset, &brw->cs.prog_data);
 183    ralloc_free(mem_ctx);
 184
 185    return true;
 186 }
 187
 188
 189 static void
 190 brw_cs_populate_key(struct brw_context *brw, struct brw_cs_prog_key *key)
 191 {
 192    struct gl_context *ctx = &brw->ctx;
 193    /* BRW_NEW_COMPUTE_PROGRAM */
 194    const struct brw_compute_program *cp =
 195       (struct brw_compute_program *) brw->compute_program;
 196    const struct gl_program *prog = (struct gl_program *) cp;
 197
 198    memset(key, 0, sizeof(*key));
 199
 200    /* _NEW_TEXTURE */
 201    brw_populate_sampler_prog_key_data(ctx, prog, brw->cs.base.sampler_count,
 202                                       &key->tex);
 203
 204    /* The unique compute program ID */
 205    key->program_string_id = cp->id;
 206 }
 207
 208
 209 void
 210 brw_upload_cs_prog(struct brw_context *brw)
 211 {
 212    struct gl_context *ctx = &brw->ctx;
 213    struct brw_cs_prog_key key;
 214    struct brw_compute_program *cp = (struct brw_compute_program *)
 215       brw->compute_program;
 216
 217    if (!cp)
 218       return;
 219
 220    if (!brw_state_dirty(brw, _NEW_TEXTURE, BRW_NEW_COMPUTE_PROGRAM))
 221       return;
 222
 223    brw->cs.base.sampler_count =
 224       _mesa_fls(ctx->ComputeProgram._Current->Base.SamplersUsed);
 225
 226    brw_cs_populate_key(brw, &key);
 227
 228    if (!brw_search_cache(&brw->cache, BRW_CACHE_CS_PROG,
 229                          &key, sizeof(key),
 230                          &brw->cs.base.prog_offset, &brw->cs.prog_data)) {
 231       bool success =
 232          brw_codegen_cs_prog(brw,
 233                              ctx->Shader.CurrentProgram[MESA_SHADER_COMPUTE],
 234                              cp, &key);
 235       (void) success;
 236       assert(success);
 237    }
 238    brw->cs.base.prog_data = &brw->cs.prog_data->base;
 239 }
 240
 241
 242 bool
 243 brw_cs_precompile(struct gl_context *ctx,
 244                   struct gl_shader_program *shader_prog,
 245                   struct gl_program *prog)
 246 {
 247    struct brw_context *brw = brw_context(ctx);
 248    struct brw_cs_prog_key key;
 249
 250    struct gl_compute_program *cp = (struct gl_compute_program *) prog;
 251    struct brw_compute_program *bcp = brw_compute_program(cp);
 252
 253    memset(&key, 0, sizeof(key));
 254    key.program_string_id = bcp->id;
 255
 256    brw_setup_tex_for_precompile(brw, &key.tex, prog);
 257
 258    uint32_t old_prog_offset = brw->cs.base.prog_offset;
 259    struct brw_cs_prog_data *old_prog_data = brw->cs.prog_data;
 260
 261    bool success = brw_codegen_cs_prog(brw, shader_prog, bcp, &key);
 262
 263    brw->cs.base.prog_offset = old_prog_offset;
 264    brw->cs.prog_data = old_prog_data;
 265
 266    return success;
 267 }