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_wm.h"
  28 #include "intel_mipmap_tree.h"
  29 #include "brw_state.h"
  30 #include "intel_batchbuffer.h"
  31 #include "compiler/brw_nir.h"
  32 #include "brw_program.h"
  33 #include "compiler/glsl/ir_uniform.h"
  34
  35 uint32_t
  36 brw_cs_group_size(const struct brw_context *brw)
  37 {
  38    assert(brw->cs.base.prog_data);
  39    struct brw_cs_prog_data *cs_prog_data =
  40       brw_cs_prog_data(brw->cs.base.prog_data);
  41
  42    if (brw->compute.group_size) {
  43       /* With ARB_compute_variable_group_size the group size is set at
  44        * dispatch time, so we can't use the one provided by the compiler.
  45        */
  46       return brw->compute.group_size[0] *
  47              brw->compute.group_size[1] *
  48              brw->compute.group_size[2];
  49    } else {
  50       return cs_prog_data->local_size[0] *
  51              cs_prog_data->local_size[1] *
  52              cs_prog_data->local_size[2];
  53    }
  54 }
  55
  56 static void
  57 assign_cs_binding_table_offsets(const struct gen_device_info *devinfo,
  58                                 const struct gl_program *prog,
  59                                 struct brw_cs_prog_data *prog_data)
  60 {
  61    uint32_t next_binding_table_offset = 0;
  62
  63    /* May not be used if the gl_NumWorkGroups variable is not accessed. */
  64    prog_data->binding_table.work_groups_start = next_binding_table_offset;
  65    next_binding_table_offset++;
  66
  67    brw_assign_common_binding_table_offsets(devinfo, prog, &prog_data->base,
  68                                            next_binding_table_offset);
  69 }
  70
  71 static bool
  72 brw_codegen_cs_prog(struct brw_context *brw,
  73                     struct brw_program *cp,
  74                     struct brw_cs_prog_key *key)
  75 {
  76    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  77    const GLuint *program;
  78    void *mem_ctx = ralloc_context(NULL);
  79    struct brw_cs_prog_data prog_data;
  80    bool start_busy = false;
  81    double start_time = 0;
  82    struct gl_context *gl_ctx = &brw->ctx;
  83    nir_shader *nir = nir_shader_clone(mem_ctx, cp->program.nir);
  84
  85    memset(&prog_data, 0, sizeof(prog_data));
  86
  87    if (cp->program.info.cs.shared_size > 64 * 1024) {
  88       cp->program.sh.data->LinkStatus = LINKING_FAILURE;
  89       const char *error_str =
  90          "Compute shader used more than 64KB of shared variables";
  91       ralloc_strcat(&cp->program.sh.data->InfoLog, error_str);
  92       _mesa_problem(NULL, "Failed to link compute shader: %s\n", error_str);
  93
  94       ralloc_free(mem_ctx);
  95       return false;
  96    }
  97
  98    assign_cs_binding_table_offsets(devinfo, &cp->program, &prog_data);
  99
 100    brw_nir_setup_glsl_uniforms(mem_ctx, nir,
 101                                &cp->program, &prog_data.base, true);
 102
 103    if (unlikely(brw->perf_debug)) {
 104       start_busy = (brw->batch.last_bo &&
 105                     brw_bo_busy(brw->batch.last_bo));
 106       start_time = get_time();
 107    }
 108
 109    int st_index = -1;
 110    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
 111       st_index = brw_get_shader_time_index(brw, &cp->program, ST_CS, true);
 112
 113    /* If the work group size is variable we set it to the maximum here since
 114     * the actual size is not known until the dispatch command is issued.
 115     */
 116    if (nir->info.cs.local_size_variable) {
 117       prog_data.uses_variable_group_size = true;
 118       nir->info.cs.max_variable_local_size =
 119          gl_ctx->Const.MaxComputeVariableGroupInvocations;
 120    } else {
 121       prog_data.uses_variable_group_size = false;
 122    }
 123
 124    char *error_str;
 125    program = brw_compile_cs(brw->screen->compiler, brw, mem_ctx, key,
 126                             &prog_data, nir, st_index, NULL, &error_str);
 127    if (program == NULL) {
 128       cp->program.sh.data->LinkStatus = LINKING_FAILURE;
 129       ralloc_strcat(&cp->program.sh.data->InfoLog, error_str);
 130       _mesa_problem(NULL, "Failed to compile compute shader: %s\n", error_str);
 131
 132       ralloc_free(mem_ctx);
 133       return false;
 134    }
 135
 136    if (unlikely(brw->perf_debug)) {
 137       if (cp->compiled_once) {
 138          brw_debug_recompile(brw, MESA_SHADER_COMPUTE, cp->program.Id,
 139                              &key->base);
 140       }
 141       cp->compiled_once = true;
 142
 143       if (start_busy && !brw_bo_busy(brw->batch.last_bo)) {
 144          perf_debug("CS compile took %.03f ms and stalled the GPU\n",
 145                     (get_time() - start_time) * 1000);
 146       }
 147    }
 148
 149    brw_alloc_stage_scratch(brw, &brw->cs.base, prog_data.base.total_scratch);
 150
 151    /* The param and pull_param arrays will be freed by the shader cache. */
 152    ralloc_steal(NULL, prog_data.base.param);
 153    ralloc_steal(NULL, prog_data.base.pull_param);
 154    brw_upload_cache(&brw->cache, BRW_CACHE_CS_PROG,
 155                     key, sizeof(*key),
 156                     program, prog_data.base.program_size,
 157                     &prog_data, sizeof(prog_data),
 158                     &brw->cs.base.prog_offset, &brw->cs.base.prog_data);
 159    ralloc_free(mem_ctx);
 160
 161    return true;
 162 }
 163
 164
 165 void
 166 brw_cs_populate_key(struct brw_context *brw, struct brw_cs_prog_key *key)
 167 {
 168    struct gl_context *ctx = &brw->ctx;
 169    /* BRW_NEW_COMPUTE_PROGRAM */
 170    const struct brw_program *cp =
 171       (struct brw_program *) brw->programs[MESA_SHADER_COMPUTE];
 172
 173    memset(key, 0, sizeof(*key));
 174
 175    /* _NEW_TEXTURE */
 176    brw_populate_base_prog_key(ctx, cp, &key->base);
 177 }
 178
 179
 180 void
 181 brw_upload_cs_prog(struct brw_context *brw)
 182 {
 183    struct gl_context *ctx = &brw->ctx;
 184    struct brw_cs_prog_key key;
 185    struct brw_program *cp =
 186       (struct brw_program *) brw->programs[MESA_SHADER_COMPUTE];
 187
 188    if (!cp)
 189       return;
 190
 191    if (!brw_state_dirty(brw, _NEW_TEXTURE, BRW_NEW_COMPUTE_PROGRAM))
 192       return;
 193
 194    brw->cs.base.sampler_count =
 195       util_last_bit(ctx->ComputeProgram._Current->SamplersUsed);
 196
 197    brw_cs_populate_key(brw, &key);
 198
 199    if (brw_search_cache(&brw->cache, BRW_CACHE_CS_PROG, &key, sizeof(key),
 200                         &brw->cs.base.prog_offset, &brw->cs.base.prog_data,
 201                         true))
 202       return;
 203
 204    if (brw_disk_cache_upload_program(brw, MESA_SHADER_COMPUTE))
 205       return;
 206
 207    cp = (struct brw_program *) brw->programs[MESA_SHADER_COMPUTE];
 208    cp->id = key.base.program_string_id;
 209
 210    ASSERTED bool success = brw_codegen_cs_prog(brw, cp, &key);
 211    assert(success);
 212 }
 213
 214 void
 215 brw_cs_populate_default_key(const struct brw_compiler *compiler,
 216                             struct brw_cs_prog_key *key,
 217                             struct gl_program *prog)
 218 {
 219    const struct gen_device_info *devinfo = compiler->devinfo;
 220    memset(key, 0, sizeof(*key));
 221    brw_populate_default_base_prog_key(devinfo, brw_program(prog), &key->base);
 222 }
 223
 224 bool
 225 brw_cs_precompile(struct gl_context *ctx, struct gl_program *prog)
 226 {
 227    struct brw_context *brw = brw_context(ctx);
 228    struct brw_cs_prog_key key;
 229
 230    struct brw_program *bcp = brw_program(prog);
 231
 232    brw_cs_populate_default_key(brw->screen->compiler, &key, prog);
 233
 234    uint32_t old_prog_offset = brw->cs.base.prog_offset;
 235    struct brw_stage_prog_data *old_prog_data = brw->cs.base.prog_data;
 236
 237    bool success = brw_codegen_cs_prog(brw, bcp, &key);
 238
 239    brw->cs.base.prog_offset = old_prog_offset;
 240    brw->cs.base.prog_data = old_prog_data;
 241
 242    return success;
 243 }