--- /dev/null
+/*
+ * Copyright © 2020 Google, Inc.
+ *
+ * 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_serialize.h"
+
+#include "ir3_compiler.h"
+#include "ir3_nir.h"
+
+#define debug 0
+
+/*
+ * Shader disk-cache implementation.
+ *
+ * Note that at least in the EGL_ANDROID_blob_cache, we should never
+ * rely on inter-dependencies between different cache entries:
+ *
+ * No guarantees are made as to whether a given key/value pair is present in
+ * the cache after the set call. If a different value has been associated
+ * with the given key in the past then it is undefined which value, if any, is
+ * associated with the key after the set call. Note that while there are no
+ * guarantees, the cache implementation should attempt to cache the most
+ * recently set value for a given key.
+ *
+ * for this reason, because binning pass variants share const_state with
+ * their draw-pass counterpart, both variants are serialized together.
+ */
+
+void
+ir3_disk_cache_init(struct ir3_compiler *compiler)
+{
+ if (ir3_shader_debug & IR3_DBG_NOCACHE)
+ return;
+
+ /* array length = print length + nul char + 1 extra to verify it's unused */
+ char renderer[7];
+ ASSERTED int len =
+ snprintf(renderer, sizeof(renderer), "FD%03d", compiler->gpu_id);
+ assert(len == sizeof(renderer) - 2);
+
+ const struct build_id_note *note =
+ build_id_find_nhdr_for_addr(ir3_disk_cache_init);
+ assert(note && build_id_length(note) == 20); /* sha1 */
+
+ const uint8_t *id_sha1 = build_id_data(note);
+ assert(id_sha1);
+
+ char timestamp[41];
+ _mesa_sha1_format(timestamp, id_sha1);
+
+ const uint64_t driver_flags = ir3_shader_debug;
+ compiler->disk_cache = disk_cache_create(renderer, timestamp, driver_flags);
+}
+
+void
+ir3_disk_cache_init_shader_key(struct ir3_compiler *compiler,
+ struct ir3_shader *shader)
+{
+ if (!compiler->disk_cache)
+ return;
+
+ struct mesa_sha1 ctx;
+
+ _mesa_sha1_init(&ctx);
+
+ /* Serialize the NIR to a binary blob that we can hash for the disk
+ * cache. Drop unnecessary information (like variable names)
+ * so the serialized NIR is smaller, and also to let us detect more
+ * isomorphic shaders when hashing, increasing cache hits.
+ */
+ struct blob blob;
+ blob_init(&blob);
+ nir_serialize(&blob, shader->nir, true);
+ _mesa_sha1_update(&ctx, blob.data, blob.size);
+ blob_finish(&blob);
+
+ /* Note that on some gens stream-out is lowered in ir3 to stg. For later
+ * gens we maybe don't need to include stream-out in the cache key.
+ */
+ _mesa_sha1_update(&ctx, &shader->stream_output, sizeof(shader->stream_output));
+
+ _mesa_sha1_final(&ctx, shader->cache_key);
+}
+
+static void
+compute_variant_key(struct ir3_compiler *compiler,
+ struct ir3_shader_variant *v, cache_key cache_key)
+{
+ struct blob blob;
+ blob_init(&blob);
+
+ blob_write_bytes(&blob, &v->shader->cache_key, sizeof(v->shader->cache_key));
+ blob_write_bytes(&blob, &v->key, sizeof(v->key));
+ blob_write_uint8(&blob, v->binning_pass);
+
+ disk_cache_compute_key(compiler->disk_cache, blob.data, blob.size, cache_key);
+
+ blob_finish(&blob);
+}
+
+static void
+retrieve_variant(struct blob_reader *blob, struct ir3_shader_variant *v)
+{
+ blob_copy_bytes(blob, VARIANT_CACHE_PTR(v), VARIANT_CACHE_SIZE);
+
+ /*
+ * pointers need special handling:
+ */
+
+ v->bin = malloc(4 * v->info.sizedwords);
+ blob_copy_bytes(blob, v->bin, 4 * v->info.sizedwords);
+
+ if (!v->binning_pass) {
+ blob_copy_bytes(blob, v->const_state, sizeof(*v->const_state));
+ unsigned immeds_sz = v->const_state->immediates_size *
+ sizeof(v->const_state->immediates[0]);
+ v->const_state->immediates = ralloc_size(v->const_state, immeds_sz);
+ blob_copy_bytes(blob, v->const_state->immediates, immeds_sz);
+ }
+}
+
+static void
+store_variant(struct blob *blob, struct ir3_shader_variant *v)
+{
+ blob_write_bytes(blob, VARIANT_CACHE_PTR(v), VARIANT_CACHE_SIZE);
+
+ /*
+ * pointers need special handling:
+ */
+
+ blob_write_bytes(blob, v->bin, 4 * v->info.sizedwords);
+
+ if (!v->binning_pass) {
+ blob_write_bytes(blob, v->const_state, sizeof(*v->const_state));
+ unsigned immeds_sz = v->const_state->immediates_size *
+ sizeof(v->const_state->immediates[0]);
+ blob_write_bytes(blob, v->const_state->immediates, immeds_sz);
+ }
+}
+
+bool
+ir3_disk_cache_retrieve(struct ir3_compiler *compiler,
+ struct ir3_shader_variant *v)
+{
+ if (!compiler->disk_cache)
+ return false;
+
+ cache_key cache_key;
+
+ compute_variant_key(compiler, v, cache_key);
+
+ if (debug) {
+ char sha1[41];
+ _mesa_sha1_format(sha1, cache_key);
+ fprintf(stderr, "[mesa disk cache] retrieving variant %s: ", sha1);
+ }
+
+ size_t size;
+ void *buffer = disk_cache_get(compiler->disk_cache, cache_key, &size);
+
+ if (debug)
+ fprintf(stderr, "%s\n", buffer ? "found" : "missing");
+
+ if (!buffer)
+ return false;
+
+ struct blob_reader blob;
+ blob_reader_init(&blob, buffer, size);
+
+ retrieve_variant(&blob, v);
+
+ if (v->binning)
+ retrieve_variant(&blob, v->binning);
+
+ free(buffer);
+
+ return true;
+}
+
+void
+ir3_disk_cache_store(struct ir3_compiler *compiler,
+ struct ir3_shader_variant *v)
+{
+ if (!compiler->disk_cache)
+ return;
+
+ cache_key cache_key;
+
+ compute_variant_key(compiler, v, cache_key);
+
+ if (debug) {
+ char sha1[41];
+ _mesa_sha1_format(sha1, cache_key);
+ fprintf(stderr, "[mesa disk cache] storing variant %s\n", sha1);
+ }
+
+ struct blob blob;
+ blob_init(&blob);
+
+ store_variant(&blob, v);
+
+ if (v->binning)
+ store_variant(&blob, v->binning);
+
+ disk_cache_put(compiler->disk_cache, cache_key, blob.data, blob.size, NULL);
+ blob_finish(&blob);
+}
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