/*
Copyright (C) Intel Corp. 2006. All Rights Reserved.
- Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ Intel funded Tungsten Graphics to
develop this 3D driver.
-
+
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
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.
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.
-
+
**********************************************************************/
/*
* Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
+ * Keith Whitwell <keithw@vmware.com>
*/
/** @file brw_state_cache.c
*
- * This file implements a simple static state cache for 965. The consumers
- * can query the hash table of state using a cache_id, opaque key data,
- * and list of buffers that will be used in relocations, and receive the
- * corresponding state buffer object of state (plus associated auxiliary
- * data) in return.
- *
- * The inner workings are a simple hash table based on a CRC of the key data.
- * The cache_id and relocation target buffers associated with the state
- * buffer are included as auxiliary key data, but are not part of the hash
- * value (this should be fixed, but will likely be fixed instead by making
- * consumers use structured keys).
+ * This file implements a simple static state cache for 965. The
+ * consumers can query the hash table of state using a cache_id,
+ * opaque key data, and receive the corresponding state buffer object
+ * of state (plus associated auxiliary data) in return. Objects in
+ * the cache may not have relocations (pointers to other BOs) in them.
*
- * Replacement is not implemented. Instead, when the cache gets too big, at
- * a safe point (unlock) we throw out all of the cache data and let it
- * regenerate for the next rendering operation.
+ * The inner workings are a simple hash table based on a CRC of the
+ * key data.
*
- * The reloc_buf pointers need to be included as key data, otherwise the
- * non-unique values stuffed in the offset in key data through
- * brw_cache_data() may result in successful probe for state buffers
- * even when the buffer being referenced doesn't match. The result would be
- * that the same state cache entry is used twice for different buffers,
- * only one of the two buffers referenced gets put into the offset, and the
- * incorrect program is run for the other instance.
+ * Replacement is not implemented. Instead, when the cache gets too
+ * big we throw out all of the cache data and let it get regenerated.
*/
#include "main/imports.h"
-#include "brw_state.h"
#include "intel_batchbuffer.h"
+#include "brw_state.h"
+#include "brw_vs.h"
#include "brw_wm.h"
+#include "brw_vs.h"
+#include "brw_vec4_gs.h"
+#define FILE_DEBUG_FLAG DEBUG_STATE
static GLuint
hash_key(struct brw_cache_item *item)
hash = (hash << 5) | (hash >> 27);
}
- /* Include the BO pointers as key data as well */
- ikey = (GLuint *)item->reloc_bufs;
- for (i = 0; i < item->nr_reloc_bufs * sizeof(drm_intel_bo *) / 4; i++) {
- hash ^= ikey[i];
- hash = (hash << 5) | (hash >> 27);
- }
-
return hash;
}
-
-/**
- * Marks a new buffer as being chosen for the given cache id.
- */
-static void
-update_cache_last(struct brw_cache *cache, enum brw_cache_id cache_id,
- dri_bo *bo)
-{
- if (bo == cache->last_bo[cache_id])
- return; /* no change */
-
- dri_bo_unreference(cache->last_bo[cache_id]);
- cache->last_bo[cache_id] = bo;
- dri_bo_reference(cache->last_bo[cache_id]);
- cache->brw->state.dirty.cache |= 1 << cache_id;
-}
-
static int
brw_cache_item_equals(const struct brw_cache_item *a,
const struct brw_cache_item *b)
return a->cache_id == b->cache_id &&
a->hash == b->hash &&
a->key_size == b->key_size &&
- (memcmp(a->key, b->key, a->key_size) == 0) &&
- a->nr_reloc_bufs == b->nr_reloc_bufs &&
- (memcmp(a->reloc_bufs, b->reloc_bufs,
- a->nr_reloc_bufs * sizeof(dri_bo *)) == 0);
+ (memcmp(a->key, b->key, a->key_size) == 0);
}
static struct brw_cache_item *
GLuint size, i;
size = cache->size * 3;
- items = (struct brw_cache_item**) calloc(1, size * sizeof(*items));
+ items = calloc(size, sizeof(*items));
for (i = 0; i < cache->size; i++)
for (c = cache->items[i]; c; c = next) {
items[c->hash % size] = c;
}
- FREE(cache->items);
+ free(cache->items);
cache->items = items;
cache->size = size;
}
/**
* Returns the buffer object matching cache_id and key, or NULL.
*/
-dri_bo *
+bool
brw_search_cache(struct brw_cache *cache,
enum brw_cache_id cache_id,
- const void *key,
- GLuint key_size,
- dri_bo **reloc_bufs, GLuint nr_reloc_bufs,
- void *aux_return)
+ const void *key, GLuint key_size,
+ uint32_t *inout_offset, void *out_aux)
{
+ struct brw_context *brw = cache->brw;
struct brw_cache_item *item;
struct brw_cache_item lookup;
GLuint hash;
lookup.cache_id = cache_id;
lookup.key = key;
lookup.key_size = key_size;
- lookup.reloc_bufs = reloc_bufs;
- lookup.nr_reloc_bufs = nr_reloc_bufs;
hash = hash_key(&lookup);
lookup.hash = hash;
item = search_cache(cache, hash, &lookup);
if (item == NULL)
- return NULL;
+ return false;
- if (aux_return)
- *(void **)aux_return = (void *)((char *)item->key + item->key_size);
+ *(void **)out_aux = ((char *)item->key + item->key_size);
- update_cache_last(cache, cache_id, item->bo);
+ if (item->offset != *inout_offset) {
+ brw->state.dirty.cache |= (1 << cache_id);
+ *inout_offset = item->offset;
+ }
- dri_bo_reference(item->bo);
- return item->bo;
+ return true;
}
+static void
+brw_cache_new_bo(struct brw_cache *cache, uint32_t new_size)
+{
+ struct brw_context *brw = cache->brw;
+ drm_intel_bo *new_bo;
+
+ new_bo = drm_intel_bo_alloc(brw->bufmgr, "program cache", new_size, 64);
+
+ /* Copy any existing data that needs to be saved. */
+ if (cache->next_offset != 0) {
+ drm_intel_bo_map(cache->bo, false);
+ drm_intel_bo_subdata(new_bo, 0, cache->next_offset, cache->bo->virtual);
+ drm_intel_bo_unmap(cache->bo);
+ }
-drm_intel_bo *
-brw_upload_cache_with_auxdata(struct brw_cache *cache,
- enum brw_cache_id cache_id,
- const void *key,
- GLuint key_size,
- dri_bo **reloc_bufs,
- GLuint nr_reloc_bufs,
- const void *data,
- GLuint data_size,
- const void *aux,
- GLuint aux_size,
- void *aux_return)
+ drm_intel_bo_unreference(cache->bo);
+ cache->bo = new_bo;
+ cache->bo_used_by_gpu = false;
+
+ /* Since we have a new BO in place, we need to signal the units
+ * that depend on it (state base address on gen5+, or unit state before).
+ */
+ brw->state.dirty.brw |= BRW_NEW_PROGRAM_CACHE;
+}
+
+/**
+ * Attempts to find an item in the cache with identical data and aux
+ * data to use
+ */
+static bool
+brw_try_upload_using_copy(struct brw_cache *cache,
+ struct brw_cache_item *result_item,
+ const void *data,
+ const void *aux)
{
- struct brw_cache_item *item = CALLOC_STRUCT(brw_cache_item);
- GLuint hash;
- GLuint relocs_size = nr_reloc_bufs * sizeof(dri_bo *);
- void *tmp;
- dri_bo *bo;
int i;
+ struct brw_cache_item *item;
- item->cache_id = cache_id;
- item->key = key;
- item->key_size = key_size;
- item->reloc_bufs = reloc_bufs;
- item->nr_reloc_bufs = nr_reloc_bufs;
- hash = hash_key(item);
- item->hash = hash;
+ for (i = 0; i < cache->size; i++) {
+ for (item = cache->items[i]; item; item = item->next) {
+ const void *item_aux = item->key + item->key_size;
+ int ret;
+
+ if (item->cache_id != result_item->cache_id ||
+ item->size != result_item->size ||
+ item->aux_size != result_item->aux_size) {
+ continue;
+ }
- /* Create the buffer object to contain the data */
- bo = dri_bo_alloc(cache->brw->intel.bufmgr,
- cache->name[cache_id], data_size, 1 << 6);
+ if (cache->aux_compare[result_item->cache_id]) {
+ if (!cache->aux_compare[result_item->cache_id](item_aux, aux))
+ continue;
+ } else if (memcmp(item_aux, aux, item->aux_size) != 0) {
+ continue;
+ }
+ drm_intel_bo_map(cache->bo, false);
+ ret = memcmp(cache->bo->virtual + item->offset, data, item->size);
+ drm_intel_bo_unmap(cache->bo);
+ if (ret)
+ continue;
- /* Set up the memory containing the key, aux_data, and reloc_bufs */
- tmp = malloc(key_size + aux_size + relocs_size);
+ result_item->offset = item->offset;
- memcpy(tmp, key, key_size);
- memcpy(tmp + key_size, aux, aux_size);
- memcpy(tmp + key_size + aux_size, reloc_bufs, relocs_size);
- for (i = 0; i < nr_reloc_bufs; i++) {
- if (reloc_bufs[i] != NULL)
- dri_bo_reference(reloc_bufs[i]);
+ return true;
+ }
}
- item->key = tmp;
- item->reloc_bufs = tmp + key_size + aux_size;
+ return false;
+}
- item->bo = bo;
- dri_bo_reference(bo);
+static void
+brw_upload_item_data(struct brw_cache *cache,
+ struct brw_cache_item *item,
+ const void *data)
+{
+ /* Allocate space in the cache BO for our new program. */
+ if (cache->next_offset + item->size > cache->bo->size) {
+ uint32_t new_size = cache->bo->size * 2;
- if (cache->n_items > cache->size * 1.5)
- rehash(cache);
+ while (cache->next_offset + item->size > new_size)
+ new_size *= 2;
- hash %= cache->size;
- item->next = cache->items[hash];
- cache->items[hash] = item;
- cache->n_items++;
-
- if (aux_return) {
- *(void **)aux_return = (void *)((char *)item->key + item->key_size);
+ brw_cache_new_bo(cache, new_size);
}
- if (INTEL_DEBUG & DEBUG_STATE)
- printf("upload %s: %d bytes to cache id %d\n",
- cache->name[cache_id],
- data_size, cache_id);
-
- /* Copy data to the buffer */
- dri_bo_subdata(bo, 0, data_size, data);
+ /* If we would block on writing to an in-use program BO, just
+ * recreate it.
+ */
+ if (cache->bo_used_by_gpu) {
+ brw_cache_new_bo(cache, cache->bo->size);
+ }
- update_cache_last(cache, cache_id, bo);
+ item->offset = cache->next_offset;
- return bo;
+ /* Programs are always 64-byte aligned, so set up the next one now */
+ cache->next_offset = ALIGN(item->offset + item->size, 64);
}
-drm_intel_bo *
+void
brw_upload_cache(struct brw_cache *cache,
enum brw_cache_id cache_id,
const void *key,
GLuint key_size,
- dri_bo **reloc_bufs,
- GLuint nr_reloc_bufs,
const void *data,
- GLuint data_size)
-{
- return brw_upload_cache_with_auxdata(cache, cache_id,
- key, key_size,
- reloc_bufs, nr_reloc_bufs,
- data, data_size,
- NULL, 0,
- NULL);
-}
-
-/**
- * Wrapper around brw_cache_data_sz using the cache_id's canonical key size.
- *
- * If nr_reloc_bufs is nonzero, brw_search_cache()/brw_upload_cache() would be
- * better to use, as the potentially changing offsets in the data-used-as-key
- * will result in excessive cache misses.
- *
- * If aux data is involved, use search/upload instead.
-
- */
-dri_bo *
-brw_cache_data(struct brw_cache *cache,
- enum brw_cache_id cache_id,
- const void *data,
- GLuint data_size,
- dri_bo **reloc_bufs,
- GLuint nr_reloc_bufs)
+ GLuint data_size,
+ const void *aux,
+ GLuint aux_size,
+ uint32_t *out_offset,
+ void *out_aux)
{
- dri_bo *bo;
- struct brw_cache_item *item, lookup;
+ struct brw_cache_item *item = CALLOC_STRUCT(brw_cache_item);
GLuint hash;
+ void *tmp;
- lookup.cache_id = cache_id;
- lookup.key = data;
- lookup.key_size = data_size;
- lookup.reloc_bufs = reloc_bufs;
- lookup.nr_reloc_bufs = nr_reloc_bufs;
- hash = hash_key(&lookup);
- lookup.hash = hash;
+ item->cache_id = cache_id;
+ item->size = data_size;
+ item->key = key;
+ item->key_size = key_size;
+ item->aux_size = aux_size;
+ hash = hash_key(item);
+ item->hash = hash;
- item = search_cache(cache, hash, &lookup);
- if (item) {
- update_cache_last(cache, cache_id, item->bo);
- dri_bo_reference(item->bo);
- return item->bo;
+ /* If we can find a matching prog/prog_data combo in the cache
+ * already, then reuse the existing stuff. This will mean not
+ * flagging CACHE_NEW_* when transitioning between the two
+ * equivalent hash keys. This is notably useful for programs
+ * generating shaders at runtime, where multiple shaders may
+ * compile to the thing in our backend.
+ */
+ if (!brw_try_upload_using_copy(cache, item, data, aux)) {
+ brw_upload_item_data(cache, item, data);
}
- bo = brw_upload_cache(cache, cache_id,
- data, data_size,
- reloc_bufs, nr_reloc_bufs,
- data, data_size);
-
- return bo;
-}
-
-enum pool_type {
- DW_SURFACE_STATE,
- DW_GENERAL_STATE
-};
-
-
-static void
-brw_init_cache_id(struct brw_cache *cache,
- const char *name,
- enum brw_cache_id id)
-{
- cache->name[id] = strdup(name);
-}
-
-
-static void
-brw_init_non_surface_cache(struct brw_context *brw)
-{
- struct brw_cache *cache = &brw->cache;
-
- cache->brw = brw;
-
- cache->size = 7;
- cache->n_items = 0;
- cache->items = (struct brw_cache_item **)
- calloc(1, cache->size * sizeof(struct brw_cache_item));
-
- brw_init_cache_id(cache, "CC_VP", BRW_CC_VP);
- brw_init_cache_id(cache, "CC_UNIT", BRW_CC_UNIT);
- brw_init_cache_id(cache, "WM_PROG", BRW_WM_PROG);
- brw_init_cache_id(cache, "SAMPLER_DEFAULT_COLOR", BRW_SAMPLER_DEFAULT_COLOR);
- brw_init_cache_id(cache, "SAMPLER", BRW_SAMPLER);
- brw_init_cache_id(cache, "WM_UNIT", BRW_WM_UNIT);
- brw_init_cache_id(cache, "SF_PROG", BRW_SF_PROG);
- brw_init_cache_id(cache, "SF_VP", BRW_SF_VP);
-
- brw_init_cache_id(cache, "SF_UNIT", BRW_SF_UNIT);
+ /* Set up the memory containing the key and aux_data */
+ tmp = malloc(key_size + aux_size);
- brw_init_cache_id(cache, "VS_UNIT", BRW_VS_UNIT);
+ memcpy(tmp, key, key_size);
+ memcpy(tmp + key_size, aux, aux_size);
- brw_init_cache_id(cache, "VS_PROG", BRW_VS_PROG);
+ item->key = tmp;
- brw_init_cache_id(cache, "CLIP_UNIT", BRW_CLIP_UNIT);
+ if (cache->n_items > cache->size * 1.5)
+ rehash(cache);
- brw_init_cache_id(cache, "CLIP_PROG", BRW_CLIP_PROG);
- brw_init_cache_id(cache, "CLIP_VP", BRW_CLIP_VP);
+ hash %= cache->size;
+ item->next = cache->items[hash];
+ cache->items[hash] = item;
+ cache->n_items++;
- brw_init_cache_id(cache, "GS_UNIT", BRW_GS_UNIT);
+ /* Copy data to the buffer */
+ drm_intel_bo_subdata(cache->bo, item->offset, data_size, data);
- brw_init_cache_id(cache, "GS_PROG", BRW_GS_PROG);
- brw_init_cache_id(cache, "BLEND_STATE", BRW_BLEND_STATE);
- brw_init_cache_id(cache, "COLOR_CALC_STATE", BRW_COLOR_CALC_STATE);
- brw_init_cache_id(cache, "DEPTH_STENCIL_STATE", BRW_DEPTH_STENCIL_STATE);
+ *out_offset = item->offset;
+ *(void **)out_aux = (void *)((char *)item->key + item->key_size);
+ cache->brw->state.dirty.cache |= 1 << cache_id;
}
-
-static void
-brw_init_surface_cache(struct brw_context *brw)
+void
+brw_init_caches(struct brw_context *brw)
{
- struct brw_cache *cache = &brw->surface_cache;
+ struct brw_cache *cache = &brw->cache;
cache->brw = brw;
cache->size = 7;
cache->n_items = 0;
- cache->items = (struct brw_cache_item **)
- calloc(1, cache->size * sizeof(struct brw_cache_item));
-
- brw_init_cache_id(cache, "SS_SURFACE", BRW_SS_SURFACE);
- brw_init_cache_id(cache, "SS_SURF_BIND", BRW_SS_SURF_BIND);
+ cache->items =
+ calloc(cache->size, sizeof(struct brw_cache_item *));
+
+ cache->bo = drm_intel_bo_alloc(brw->bufmgr,
+ "program cache",
+ 4096, 64);
+
+ cache->aux_compare[BRW_VS_PROG] = brw_vs_prog_data_compare;
+ cache->aux_compare[BRW_GS_PROG] = brw_gs_prog_data_compare;
+ cache->aux_compare[BRW_WM_PROG] = brw_wm_prog_data_compare;
+ cache->aux_free[BRW_VS_PROG] = brw_stage_prog_data_free;
+ cache->aux_free[BRW_GS_PROG] = brw_stage_prog_data_free;
+ cache->aux_free[BRW_WM_PROG] = brw_stage_prog_data_free;
}
-
-void
-brw_init_caches(struct brw_context *brw)
-{
- brw_init_non_surface_cache(brw);
- brw_init_surface_cache(brw);
-}
-
-
static void
brw_clear_cache(struct brw_context *brw, struct brw_cache *cache)
{
struct brw_cache_item *c, *next;
GLuint i;
- if (INTEL_DEBUG & DEBUG_STATE)
- printf("%s\n", __FUNCTION__);
+ DBG("%s\n", __FUNCTION__);
for (i = 0; i < cache->size; i++) {
for (c = cache->items[i]; c; c = next) {
- int j;
-
next = c->next;
- for (j = 0; j < c->nr_reloc_bufs; j++)
- dri_bo_unreference(c->reloc_bufs[j]);
- dri_bo_unreference(c->bo);
+ if (cache->aux_free[c->cache_id]) {
+ const void *item_aux = c->key + c->key_size;
+ cache->aux_free[c->cache_id](item_aux);
+ }
free((void *)c->key);
free(c);
}
cache->n_items = 0;
- if (brw->curbe.last_buf) {
- free(brw->curbe.last_buf);
- brw->curbe.last_buf = NULL;
- }
+ /* Start putting programs into the start of the BO again, since
+ * we'll never find the old results.
+ */
+ cache->next_offset = 0;
+ /* We need to make sure that the programs get regenerated, since
+ * any offsets leftover in brw_context will no longer be valid.
+ */
brw->state.dirty.mesa |= ~0;
brw->state.dirty.brw |= ~0;
brw->state.dirty.cache |= ~0;
-}
-
-/* Clear all entries from the cache that point to the given bo.
- *
- * This lets us release memory for reuse earlier for known-dead buffers,
- * at the cost of walking the entire hash table.
- */
-void
-brw_state_cache_bo_delete(struct brw_cache *cache, dri_bo *bo)
-{
- struct brw_cache_item **prev;
- GLuint i;
-
- if (INTEL_DEBUG & DEBUG_STATE)
- printf("%s\n", __FUNCTION__);
-
- for (i = 0; i < cache->size; i++) {
- for (prev = &cache->items[i]; *prev;) {
- struct brw_cache_item *c = *prev;
-
- if (drm_intel_bo_references(c->bo, bo)) {
- int j;
-
- *prev = c->next;
-
- for (j = 0; j < c->nr_reloc_bufs; j++)
- dri_bo_unreference(c->reloc_bufs[j]);
- dri_bo_unreference(c->bo);
- free((void *)c->key);
- free(c);
- cache->n_items--;
- } else {
- prev = &c->next;
- }
- }
- }
+ intel_batchbuffer_flush(brw);
}
void
brw_state_cache_check_size(struct brw_context *brw)
{
- if (INTEL_DEBUG & DEBUG_STATE)
- printf("%s (n_items=%d)\n", __FUNCTION__, brw->cache.n_items);
-
- /* un-tuned guess. We've got around 20 state objects for a total of around
- * 32k, so 1000 of them is around 1.5MB.
+ /* un-tuned guess. Each object is generally a page, so 2000 of them is 8 MB of
+ * state cache.
*/
- if (brw->cache.n_items > 1000)
+ if (brw->cache.n_items > 2000) {
+ perf_debug("Exceeded state cache size limit. Clearing the set "
+ "of compiled programs, which will trigger recompiles\n");
brw_clear_cache(brw, &brw->cache);
-
- if (brw->surface_cache.n_items > 1000)
- brw_clear_cache(brw, &brw->surface_cache);
+ }
}
static void
brw_destroy_cache(struct brw_context *brw, struct brw_cache *cache)
{
- GLuint i;
- if (INTEL_DEBUG & DEBUG_STATE)
- printf("%s\n", __FUNCTION__);
+ DBG("%s\n", __FUNCTION__);
+ drm_intel_bo_unreference(cache->bo);
+ cache->bo = NULL;
brw_clear_cache(brw, cache);
- for (i = 0; i < BRW_MAX_CACHE; i++) {
- dri_bo_unreference(cache->last_bo[i]);
- free(cache->name[i]);
- }
free(cache->items);
cache->items = NULL;
cache->size = 0;
brw_destroy_caches(struct brw_context *brw)
{
brw_destroy_cache(brw, &brw->cache);
- brw_destroy_cache(brw, &brw->surface_cache);
}
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