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

   1 /*
   2  * Copyright (c) 2017 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 <stdint.h>
  25
  26 #include "compiler/nir/nir_serialize.h"
  27 #include "util/build_id.h"
  28 #include "util/mesa-sha1.h"
  29
  30 #include "brw_context.h"
  31 #include "brw_program.h"
  32
  33 static uint8_t driver_sha1[20];
  34
  35 void
  36 brw_program_binary_init(unsigned device_id)
  37 {
  38    const struct build_id_note *note =
  39       build_id_find_nhdr_for_addr(brw_program_binary_init);
  40    assert(note);
  41
  42    /**
  43     * With Mesa's megadrivers, taking the sha1 of i965_dri.so may not be
  44     * unique. Therefore, we make a sha1 of the "i965" string and the sha1
  45     * build id from i965_dri.so.
  46     */
  47    struct mesa_sha1 ctx;
  48    _mesa_sha1_init(&ctx);
  49    char renderer[10];
  50    assert(device_id < 0x10000);
  51    int len = snprintf(renderer, sizeof(renderer), "i965_%04x", device_id);
  52    assert(len == sizeof(renderer) - 1);
  53    _mesa_sha1_update(&ctx, renderer, len);
  54    _mesa_sha1_update(&ctx, build_id_data(note), build_id_length(note));
  55    _mesa_sha1_final(&ctx, driver_sha1);
  56 }
  57
  58 void
  59 brw_get_program_binary_driver_sha1(struct gl_context *ctx, uint8_t *sha1)
  60 {
  61    memcpy(sha1, driver_sha1, sizeof(uint8_t) * 20);
  62 }
  63
  64 enum driver_cache_blob_part {
  65    END_PART,
  66    NIR_PART,
  67 };
  68
  69 void
  70 brw_program_serialize_nir(struct gl_context *ctx, struct gl_program *prog)
  71 {
  72    if (prog->driver_cache_blob)
  73       return;
  74
  75    struct blob writer;
  76    blob_init(&writer);
  77    blob_write_uint32(&writer, NIR_PART);
  78    intptr_t size_offset = blob_reserve_uint32(&writer);
  79    size_t nir_start = writer.size;
  80    nir_serialize(&writer, prog->nir);
  81    blob_overwrite_uint32(&writer, size_offset, writer.size - nir_start);
  82    blob_write_uint32(&writer, END_PART);
  83    prog->driver_cache_blob = ralloc_size(NULL, writer.size);
  84    memcpy(prog->driver_cache_blob, writer.data, writer.size);
  85    prog->driver_cache_blob_size = writer.size;
  86    blob_finish(&writer);
  87 }
  88
  89 void
  90 brw_program_deserialize_driver_blob(struct gl_context *ctx,
  91                                     struct gl_program *prog,
  92                                     gl_shader_stage stage)
  93 {
  94    if (!prog->driver_cache_blob)
  95       return;
  96
  97    struct blob_reader reader;
  98    blob_reader_init(&reader, prog->driver_cache_blob,
  99                     prog->driver_cache_blob_size);
 100
 101    do {
 102       uint32_t part_type = blob_read_uint32(&reader);
 103       if ((enum driver_cache_blob_part)part_type == END_PART)
 104          break;
 105       switch ((enum driver_cache_blob_part)part_type) {
 106       case NIR_PART: {
 107          uint32_t nir_size = blob_read_uint32(&reader);
 108          assert(!reader.overrun &&
 109                 (uintptr_t)(reader.end - reader.current) > nir_size);
 110          const struct nir_shader_compiler_options *options =
 111             ctx->Const.ShaderCompilerOptions[stage].NirOptions;
 112          prog->nir = nir_deserialize(NULL, options, &reader);
 113          break;
 114       }
 115       default:
 116          unreachable("Unsupported blob part type!");
 117          break;
 118       }
 119    } while (true);
 120
 121    ralloc_free(prog->driver_cache_blob);
 122    prog->driver_cache_blob = NULL;
 123    prog->driver_cache_blob_size = 0;
 124 }
 125
 126 /* This is just a wrapper around brw_program_deserialize_nir() as i965
 127  * doesn't need gl_shader_program like other drivers do.
 128  */
 129 void
 130 brw_deserialize_program_binary(struct gl_context *ctx,
 131                                struct gl_shader_program *shProg,
 132                                struct gl_program *prog)
 133 {
 134    brw_program_deserialize_driver_blob(ctx, prog, prog->info.stage);
 135 }
 136
 137 void
 138 brw_write_blob_program_data(struct blob *binary, gl_shader_stage stage,
 139                             const void *program,
 140                             struct brw_stage_prog_data *prog_data)
 141 {
 142    /* Write prog_data to blob. */
 143    blob_write_bytes(binary, prog_data, brw_prog_data_size(stage));
 144
 145    /* Write program to blob. */
 146    blob_write_bytes(binary, program, prog_data->program_size);
 147
 148    /* Write push params */
 149    blob_write_bytes(binary, prog_data->param,
 150                     sizeof(uint32_t) * prog_data->nr_params);
 151
 152    /* Write pull params */
 153    blob_write_bytes(binary, prog_data->pull_param,
 154                     sizeof(uint32_t) * prog_data->nr_pull_params);
 155 }
 156
 157 bool
 158 brw_read_blob_program_data(struct blob_reader *binary, struct gl_program *prog,
 159                            gl_shader_stage stage, const uint8_t **program,
 160                            struct brw_stage_prog_data *prog_data)
 161 {
 162    /* Read shader prog_data from blob. */
 163    blob_copy_bytes(binary, prog_data, brw_prog_data_size(stage));
 164    if (binary->overrun)
 165       return false;
 166
 167    /* Read shader program from blob. */
 168    *program = blob_read_bytes(binary, prog_data->program_size);
 169
 170    /* Read push params */
 171    prog_data->param = rzalloc_array(NULL, uint32_t, prog_data->nr_params);
 172    blob_copy_bytes(binary, prog_data->param,
 173                    sizeof(uint32_t) * prog_data->nr_params);
 174
 175    /* Read pull params */
 176    prog_data->pull_param = rzalloc_array(NULL, uint32_t,
 177                                          prog_data->nr_pull_params);
 178    blob_copy_bytes(binary, prog_data->pull_param,
 179                    sizeof(uint32_t) * prog_data->nr_pull_params);
 180
 181    return !binary->overrun;
 182 }