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mesa/src/compiler/clc/nir_load_libclc.c

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/*
* Copyright © 2020 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "nir.h"
#include "nir_clc_helpers.h"
#include "nir_serialize.h"
#include "nir_spirv.h"
#include "util/mesa-sha1.h"
#ifdef DYNAMIC_LIBCLC_PATH
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#endif
#ifdef HAVE_STATIC_LIBCLC_ZSTD
#include <zstd.h>
#endif
#ifdef HAVE_STATIC_LIBCLC_SPIRV
#include "spirv-mesa3d-.spv.h"
#endif
#ifdef HAVE_STATIC_LIBCLC_SPIRV64
#include "spirv64-mesa3d-.spv.h"
#endif
struct clc_file {
unsigned bit_size;
const char *static_data;
size_t static_data_size;
const char *sys_path;
};
static const struct clc_file libclc_files[] = {
{
.bit_size = 32,
#ifdef HAVE_STATIC_LIBCLC_SPIRV
.static_data = libclc_spirv_mesa3d_spv,
.static_data_size = sizeof(libclc_spirv_mesa3d_spv),
#endif
#ifdef DYNAMIC_LIBCLC_PATH
.sys_path = DYNAMIC_LIBCLC_PATH "spirv-mesa3d-.spv",
#endif
},
{
.bit_size = 64,
#ifdef HAVE_STATIC_LIBCLC_SPIRV64
.static_data = libclc_spirv64_mesa3d_spv,
.static_data_size = sizeof(libclc_spirv64_mesa3d_spv),
#endif
#ifdef DYNAMIC_LIBCLC_PATH
.sys_path = DYNAMIC_LIBCLC_PATH "spirv64-mesa3d-.spv",
#endif
},
};
static const struct clc_file *
get_libclc_file(unsigned ptr_bit_size)
{
assert(ptr_bit_size == 32 || ptr_bit_size == 64);
return &libclc_files[ptr_bit_size / 64];
}
struct clc_data {
const struct clc_file *file;
unsigned char cache_key[20];
int fd;
const void *data;
size_t size;
};
static bool
open_clc_data(struct clc_data *clc, unsigned ptr_bit_size)
{
memset(clc, 0, sizeof(*clc));
clc->file = get_libclc_file(ptr_bit_size);
clc->fd = -1;
if (clc->file->static_data) {
snprintf((char *)clc->cache_key, sizeof(clc->cache_key),
"libclc-spirv%d", ptr_bit_size);
return true;
}
#ifdef DYNAMIC_LIBCLC_PATH
if (clc->file->sys_path != NULL) {
int fd = open(clc->file->sys_path, O_RDONLY);
if (fd < 0)
return false;
struct stat stat;
int ret = fstat(fd, &stat);
if (ret < 0) {
fprintf(stderr, "fstat failed on %s: %m\n", clc->file->sys_path);
close(fd);
return false;
}
struct mesa_sha1 ctx;
_mesa_sha1_init(&ctx);
_mesa_sha1_update(&ctx, clc->file->sys_path, strlen(clc->file->sys_path));
#if defined(__APPLE__) || defined(__MACOSX)
_mesa_sha1_update(&ctx, &stat.st_mtime, sizeof(stat.st_mtime));
#else
_mesa_sha1_update(&ctx, &stat.st_mtim, sizeof(stat.st_mtim));
#endif
_mesa_sha1_final(&ctx, clc->cache_key);
clc->fd = fd;
return true;
}
#endif
return false;
}
#define SPIRV_WORD_SIZE 4
static bool
map_clc_data(struct clc_data *clc)
{
if (clc->file->static_data) {
#ifdef HAVE_STATIC_LIBCLC_ZSTD
unsigned long long cmp_size =
ZSTD_getFrameContentSize(clc->file->static_data,
clc->file->static_data_size);
if (cmp_size == ZSTD_CONTENTSIZE_UNKNOWN ||
cmp_size == ZSTD_CONTENTSIZE_ERROR) {
fprintf(stderr, "Could not determine the decompressed size of the "
"libclc SPIR-V\n");
return false;
}
size_t frame_size =
ZSTD_findFrameCompressedSize(clc->file->static_data,
clc->file->static_data_size);
if (ZSTD_isError(frame_size)) {
fprintf(stderr, "Could not determine the size of the first ZSTD frame "
"when decompressing libclc SPIR-V: %s\n",
ZSTD_getErrorName(frame_size));
return false;
}
void *dest = malloc(cmp_size + 1);
size_t size = ZSTD_decompress(dest, cmp_size, clc->file->static_data,
frame_size);
if (ZSTD_isError(size)) {
free(dest);
fprintf(stderr, "Error decompressing libclc SPIR-V: %s\n",
ZSTD_getErrorName(size));
return false;
}
clc->data = dest;
clc->size = size;
#else
clc->data = clc->file->static_data;
clc->size = clc->file->static_data_size;
#endif
return true;
}
#ifdef DYNAMIC_LIBCLC_PATH
if (clc->file->sys_path != NULL) {
off_t len = lseek(clc->fd, 0, SEEK_END);
if (len % SPIRV_WORD_SIZE != 0) {
fprintf(stderr, "File length isn't a multiple of the word size\n");
return false;
}
clc->size = len;
clc->data = mmap(NULL, len, PROT_READ, MAP_PRIVATE, clc->fd, 0);
if (clc->data == MAP_FAILED) {
fprintf(stderr, "Failed to mmap libclc SPIR-V: %m\n");
return false;
}
return true;
}
#endif
return true;
}
static void
close_clc_data(struct clc_data *clc)
{
if (clc->file->static_data) {
#ifdef HAVE_STATIC_LIBCLC_ZSTD
free((void *)clc->data);
#endif
return;
}
#ifdef DYNAMIC_LIBCLC_PATH
if (clc->file->sys_path != NULL) {
if (clc->data)
munmap((void *)clc->data, clc->size);
close(clc->fd);
}
#endif
}
/** Returns true if libclc is found
*
* If libclc is compiled in statically, this always returns true. If we
* depend on a dynamic libclc, this opens and tries to stat the file.
*/
bool
nir_can_find_libclc(unsigned ptr_bit_size)
{
struct clc_data clc;
if (open_clc_data(&clc, ptr_bit_size)) {
close_clc_data(&clc);
return true;
} else {
return false;
}
}
/** Adds generic pointer variants of libclc functions
*
* Libclc currently doesn't contain generic variants for a bunch of functions
* like `frexp` but the OpenCL spec with generic pointers requires them. We
* really should fix libclc but, in the mean time, we can easily duplicate
* every function that works on global memory and make it also work on generic
* memory.
*/
static void
libclc_add_generic_variants(nir_shader *shader)
{
nir_foreach_function(func, shader) {
/* These don't need generic variants */
if (strstr(func->name, "async_work_group_strided_copy"))
continue;
char *U3AS1 = strstr(func->name, "U3AS1");
if (U3AS1 == NULL)
continue;
ptrdiff_t offset_1 = U3AS1 - func->name + 4;
assert(offset_1 < strlen(func->name) && func->name[offset_1] == '1');
char *generic_name = ralloc_strdup(shader, func->name);
assert(generic_name[offset_1] == '1');
generic_name[offset_1] = '4';
if (nir_shader_get_function_for_name(shader, generic_name))
continue;
nir_function *gfunc = nir_function_create(shader, generic_name);
gfunc->num_params = func->num_params;
gfunc->params = ralloc_array(shader, nir_parameter, gfunc->num_params);
for (unsigned i = 0; i < gfunc->num_params; i++)
gfunc->params[i] = func->params[i];
nir_function_set_impl(gfunc, nir_function_impl_clone(shader, func->impl));
/* Rewrite any global pointers to generic */
nir_foreach_block(block, gfunc->impl) {
nir_foreach_instr(instr, block) {
if (instr->type != nir_instr_type_deref)
continue;
nir_deref_instr *deref = nir_instr_as_deref(instr);
if (!nir_deref_mode_may_be(deref, nir_var_mem_global))
continue;
assert(deref->type != nir_deref_type_var);
assert(nir_deref_mode_is(deref, nir_var_mem_global));
deref->modes = nir_var_mem_generic;
}
}
nir_metadata_preserve(gfunc->impl, nir_metadata_none);
}
}
nir_shader *
nir_load_libclc_shader(unsigned ptr_bit_size,
struct disk_cache *disk_cache,
const struct spirv_to_nir_options *spirv_options,
const nir_shader_compiler_options *nir_options,
bool optimize)
{
assert(ptr_bit_size ==
nir_address_format_bit_size(spirv_options->global_addr_format));
struct clc_data clc;
if (!open_clc_data(&clc, ptr_bit_size))
return NULL;
#ifdef ENABLE_SHADER_CACHE
cache_key cache_key;
if (disk_cache) {
disk_cache_compute_key(disk_cache, clc.cache_key,
sizeof(clc.cache_key), cache_key);
size_t buffer_size;
uint8_t *buffer = disk_cache_get(disk_cache, cache_key, &buffer_size);
if (buffer) {
struct blob_reader blob;
blob_reader_init(&blob, buffer, buffer_size);
nir_shader *nir = nir_deserialize(NULL, nir_options, &blob);
free(buffer);
close_clc_data(&clc);
return nir;
}
}
#endif
if (!map_clc_data(&clc)) {
close_clc_data(&clc);
return NULL;
}
struct spirv_to_nir_options spirv_lib_options = *spirv_options;
spirv_lib_options.create_library = true;
assert(clc.size % SPIRV_WORD_SIZE == 0);
nir_shader *nir = spirv_to_nir(clc.data, clc.size / SPIRV_WORD_SIZE,
NULL, 0, MESA_SHADER_KERNEL, NULL,
&spirv_lib_options, nir_options);
nir_validate_shader(nir, "after nir_load_clc_shader");
/* nir_inline_libclc will assume that the functions in this shader are
* already ready to lower. This means we need to inline any function_temp
* initializers and lower any early returns.
*/
nir->info.internal = true;
NIR_PASS_V(nir, nir_lower_variable_initializers, nir_var_function_temp);
NIR_PASS_V(nir, nir_lower_returns);
NIR_PASS_V(nir, libclc_add_generic_variants);
/* Run some optimization passes. Those used here should be considered safe
* for all use cases and drivers.
*/
if (optimize) {
NIR_PASS_V(nir, nir_split_var_copies);
bool progress;
do {
progress = false;
NIR_PASS(progress, nir, nir_opt_copy_prop_vars);
NIR_PASS(progress, nir, nir_lower_var_copies);
NIR_PASS(progress, nir, nir_lower_vars_to_ssa);
NIR_PASS(progress, nir, nir_copy_prop);
NIR_PASS(progress, nir, nir_opt_remove_phis);
NIR_PASS(progress, nir, nir_opt_dce);
NIR_PASS(progress, nir, nir_opt_if, false);
NIR_PASS(progress, nir, nir_opt_dead_cf);
NIR_PASS(progress, nir, nir_opt_cse);
/* drivers run this pass, so don't be too aggressive. More aggressive
* values only increase effectiveness by <5%
*/
NIR_PASS(progress, nir, nir_opt_peephole_select, 0, false, false);
NIR_PASS(progress, nir, nir_opt_algebraic);
NIR_PASS(progress, nir, nir_opt_constant_folding);
NIR_PASS(progress, nir, nir_opt_undef);
NIR_PASS(progress, nir, nir_opt_deref);
} while(progress);
nir_sweep(nir);
}
#ifdef ENABLE_SHADER_CACHE
if (disk_cache) {
struct blob blob;
blob_init(&blob);
nir_serialize(&blob, nir, false);
disk_cache_put(disk_cache, cache_key, blob.data, blob.size, NULL);
blob_finish(&blob);
}
#endif
close_clc_data(&clc);
return nir;
}
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