670 lines
21 KiB
C
670 lines
21 KiB
C
/**********************************************************
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* Copyright 2008-2009 VMware, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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**********************************************************/
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#include "util/u_math.h"
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#include "util/u_memory.h"
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#include "util/crc32.h"
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#include "svga_debug.h"
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#include "svga_format.h"
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#include "svga_winsys.h"
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#include "svga_screen.h"
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#include "svga_screen_cache.h"
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#include "svga_context.h"
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#include "svga_cmd.h"
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#define SVGA_SURFACE_CACHE_ENABLED 1
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/**
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* Return the size of the surface described by the key (in bytes).
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*/
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unsigned
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svga_surface_size(const struct svga_host_surface_cache_key *key)
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{
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unsigned bw, bh, bpb, total_size, i;
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assert(key->numMipLevels > 0);
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assert(key->numFaces > 0);
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assert(key->arraySize > 0);
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if (key->format == SVGA3D_BUFFER) {
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/* Special case: we don't want to count vertex/index buffers
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* against the cache size limit, so view them as zero-sized.
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*/
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return 0;
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}
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svga_format_size(key->format, &bw, &bh, &bpb);
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total_size = 0;
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for (i = 0; i < key->numMipLevels; i++) {
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unsigned w = u_minify(key->size.width, i);
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unsigned h = u_minify(key->size.height, i);
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unsigned d = u_minify(key->size.depth, i);
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unsigned img_size = ((w + bw - 1) / bw) * ((h + bh - 1) / bh) * d * bpb;
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total_size += img_size;
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}
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total_size *= key->numFaces * key->arraySize * MAX2(1, key->sampleCount);
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return total_size;
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}
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/**
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* Compute the bucket for this key.
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*/
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static inline unsigned
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svga_screen_cache_bucket(const struct svga_host_surface_cache_key *key)
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{
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return util_hash_crc32(key, sizeof *key) % SVGA_HOST_SURFACE_CACHE_BUCKETS;
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}
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/**
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* Search the cache for a surface that matches the key. If a match is
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* found, remove it from the cache and return the surface pointer.
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* Return NULL otherwise.
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*/
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static struct svga_winsys_surface *
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svga_screen_cache_lookup(struct svga_screen *svgascreen,
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const struct svga_host_surface_cache_key *key)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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struct svga_winsys_screen *sws = svgascreen->sws;
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struct svga_host_surface_cache_entry *entry;
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struct svga_winsys_surface *handle = NULL;
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struct list_head *curr, *next;
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unsigned bucket;
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unsigned tries = 0;
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assert(key->cachable);
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bucket = svga_screen_cache_bucket(key);
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mtx_lock(&cache->mutex);
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curr = cache->bucket[bucket].next;
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next = curr->next;
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while (curr != &cache->bucket[bucket]) {
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++tries;
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entry = list_entry(curr, struct svga_host_surface_cache_entry, bucket_head);
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assert(entry->handle);
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/* If the key matches and the fence is signalled (the surface is no
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* longer needed) the lookup was successful. We found a surface that
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* can be reused.
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* We unlink the surface from the cache entry and we add the entry to
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* the 'empty' list.
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*/
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if (memcmp(&entry->key, key, sizeof *key) == 0 &&
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sws->fence_signalled(sws, entry->fence, 0) == 0) {
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unsigned surf_size;
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assert(sws->surface_is_flushed(sws, entry->handle));
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handle = entry->handle; /* Reference is transfered here. */
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entry->handle = NULL;
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/* Remove from hash table */
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list_del(&entry->bucket_head);
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/* remove from LRU list */
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list_del(&entry->head);
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/* Add the cache entry (but not the surface!) to the empty list */
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list_add(&entry->head, &cache->empty);
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/* update the cache size */
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surf_size = svga_surface_size(&entry->key);
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assert(surf_size <= cache->total_size);
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if (surf_size > cache->total_size)
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cache->total_size = 0; /* should never happen, but be safe */
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else
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cache->total_size -= surf_size;
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break;
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}
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curr = next;
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next = curr->next;
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}
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mtx_unlock(&cache->mutex);
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if (SVGA_DEBUG & DEBUG_DMA)
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debug_printf("%s: cache %s after %u tries (bucket %d)\n", __FUNCTION__,
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handle ? "hit" : "miss", tries, bucket);
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return handle;
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}
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/**
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* Free the least recently used entries in the surface cache until the
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* cache size is <= the target size OR there are no unused entries left
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* to discard. We don't do any flushing to try to free up additional
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* surfaces.
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*/
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static void
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svga_screen_cache_shrink(struct svga_screen *svgascreen,
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unsigned target_size)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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struct svga_winsys_screen *sws = svgascreen->sws;
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struct svga_host_surface_cache_entry *entry = NULL, *next_entry;
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/* Walk over the list of unused buffers in reverse order: from oldest
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* to newest.
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*/
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LIST_FOR_EACH_ENTRY_SAFE_REV(entry, next_entry, &cache->unused, head) {
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if (entry->key.format != SVGA3D_BUFFER) {
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/* we don't want to discard vertex/index buffers */
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cache->total_size -= svga_surface_size(&entry->key);
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assert(entry->handle);
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sws->surface_reference(sws, &entry->handle, NULL);
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list_del(&entry->bucket_head);
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list_del(&entry->head);
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list_add(&entry->head, &cache->empty);
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if (cache->total_size <= target_size) {
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/* all done */
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break;
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}
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}
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}
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}
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/**
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* Add a surface to the cache. This is done when the driver deletes
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* the surface. Note: transfers a handle reference.
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*/
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static void
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svga_screen_cache_add(struct svga_screen *svgascreen,
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const struct svga_host_surface_cache_key *key,
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boolean to_invalidate,
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struct svga_winsys_surface **p_handle)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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struct svga_winsys_screen *sws = svgascreen->sws;
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struct svga_host_surface_cache_entry *entry = NULL;
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struct svga_winsys_surface *handle = *p_handle;
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unsigned surf_size;
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assert(key->cachable);
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if (!handle)
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return;
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surf_size = svga_surface_size(key);
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*p_handle = NULL;
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mtx_lock(&cache->mutex);
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if (surf_size >= SVGA_HOST_SURFACE_CACHE_BYTES) {
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/* this surface is too large to cache, just free it */
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sws->surface_reference(sws, &handle, NULL);
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mtx_unlock(&cache->mutex);
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return;
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}
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if (cache->total_size + surf_size > SVGA_HOST_SURFACE_CACHE_BYTES) {
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/* Adding this surface would exceed the cache size.
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* Try to discard least recently used entries until we hit the
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* new target cache size.
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*/
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unsigned target_size = SVGA_HOST_SURFACE_CACHE_BYTES - surf_size;
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svga_screen_cache_shrink(svgascreen, target_size);
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if (cache->total_size > target_size) {
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/* we weren't able to shrink the cache as much as we wanted so
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* just discard this surface.
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*/
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sws->surface_reference(sws, &handle, NULL);
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mtx_unlock(&cache->mutex);
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return;
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}
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}
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if (!list_is_empty(&cache->empty)) {
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/* An empty entry has no surface associated with it.
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* Use the first empty entry.
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*/
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entry = list_entry(cache->empty.next,
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struct svga_host_surface_cache_entry,
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head);
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/* Remove from LRU list */
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list_del(&entry->head);
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}
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else if (!list_is_empty(&cache->unused)) {
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/* free the last used buffer and reuse its entry */
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entry = list_entry(cache->unused.prev,
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struct svga_host_surface_cache_entry,
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head);
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SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
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"unref sid %p (make space)\n", entry->handle);
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cache->total_size -= svga_surface_size(&entry->key);
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sws->surface_reference(sws, &entry->handle, NULL);
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/* Remove from hash table */
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list_del(&entry->bucket_head);
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/* Remove from LRU list */
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list_del(&entry->head);
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}
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if (entry) {
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assert(entry->handle == NULL);
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entry->handle = handle;
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memcpy(&entry->key, key, sizeof entry->key);
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SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
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"cache sid %p\n", entry->handle);
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/* If we don't have gb objects, we don't need to invalidate. */
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if (sws->have_gb_objects) {
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if (to_invalidate)
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list_add(&entry->head, &cache->validated);
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else
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list_add(&entry->head, &cache->invalidated);
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}
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else
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list_add(&entry->head, &cache->invalidated);
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cache->total_size += surf_size;
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}
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else {
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/* Couldn't cache the buffer -- this really shouldn't happen */
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SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
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"unref sid %p (couldn't find space)\n", handle);
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sws->surface_reference(sws, &handle, NULL);
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}
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mtx_unlock(&cache->mutex);
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}
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/* Maximum number of invalidate surface commands in a command buffer */
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# define SVGA_MAX_SURFACE_TO_INVALIDATE 1000
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/**
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* Called during the screen flush to move all buffers not in a validate list
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* into the unused list.
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*/
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void
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svga_screen_cache_flush(struct svga_screen *svgascreen,
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struct svga_context *svga,
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struct pipe_fence_handle *fence)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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struct svga_winsys_screen *sws = svgascreen->sws;
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struct svga_host_surface_cache_entry *entry;
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struct list_head *curr, *next;
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unsigned bucket;
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mtx_lock(&cache->mutex);
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/* Loop over entries in the invalidated list */
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curr = cache->invalidated.next;
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next = curr->next;
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while (curr != &cache->invalidated) {
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entry = list_entry(curr, struct svga_host_surface_cache_entry, head);
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assert(entry->handle);
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if (sws->surface_is_flushed(sws, entry->handle)) {
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/* remove entry from the invalidated list */
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list_del(&entry->head);
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sws->fence_reference(sws, &entry->fence, fence);
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/* Add entry to the unused list */
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list_add(&entry->head, &cache->unused);
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/* Add entry to the hash table bucket */
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bucket = svga_screen_cache_bucket(&entry->key);
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list_add(&entry->bucket_head, &cache->bucket[bucket]);
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}
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curr = next;
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next = curr->next;
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}
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unsigned nsurf = 0;
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curr = cache->validated.next;
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next = curr->next;
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while (curr != &cache->validated) {
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entry = list_entry(curr, struct svga_host_surface_cache_entry, head);
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assert(entry->handle);
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assert(svga_have_gb_objects(svga));
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if (sws->surface_is_flushed(sws, entry->handle)) {
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/* remove entry from the validated list */
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list_del(&entry->head);
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/* It is now safe to invalidate the surface content.
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* It will be done using the current context.
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*/
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if (SVGA_TRY(SVGA3D_InvalidateGBSurface(svga->swc, entry->handle))
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!= PIPE_OK) {
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ASSERTED enum pipe_error ret;
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/* Even though surface invalidation here is done after the command
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* buffer is flushed, it is still possible that it will
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* fail because there might be just enough of this command that is
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* filling up the command buffer, so in this case we will call
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* the winsys flush directly to flush the buffer.
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* Note, we don't want to call svga_context_flush() here because
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* this function itself is called inside svga_context_flush().
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*/
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svga_retry_enter(svga);
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svga->swc->flush(svga->swc, NULL);
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nsurf = 0;
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ret = SVGA3D_InvalidateGBSurface(svga->swc, entry->handle);
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svga_retry_exit(svga);
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assert(ret == PIPE_OK);
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}
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/* add the entry to the invalidated list */
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list_add(&entry->head, &cache->invalidated);
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nsurf++;
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}
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curr = next;
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next = curr->next;
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}
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mtx_unlock(&cache->mutex);
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/**
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* In some rare cases (when running ARK survival), we hit the max number
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* of surface relocations with invalidated surfaces during context flush.
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* So if the number of invalidated surface exceeds a certain limit (1000),
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* we'll do another winsys flush.
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*/
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if (nsurf > SVGA_MAX_SURFACE_TO_INVALIDATE) {
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svga->swc->flush(svga->swc, NULL);
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}
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}
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/**
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* Free all the surfaces in the cache.
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* Called when destroying the svga screen object.
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*/
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void
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svga_screen_cache_cleanup(struct svga_screen *svgascreen)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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struct svga_winsys_screen *sws = svgascreen->sws;
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unsigned i;
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for (i = 0; i < SVGA_HOST_SURFACE_CACHE_SIZE; ++i) {
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if (cache->entries[i].handle) {
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SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
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"unref sid %p (shutdown)\n", cache->entries[i].handle);
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sws->surface_reference(sws, &cache->entries[i].handle, NULL);
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cache->total_size -= svga_surface_size(&cache->entries[i].key);
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}
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if (cache->entries[i].fence)
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sws->fence_reference(sws, &cache->entries[i].fence, NULL);
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}
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mtx_destroy(&cache->mutex);
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}
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enum pipe_error
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svga_screen_cache_init(struct svga_screen *svgascreen)
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{
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struct svga_host_surface_cache *cache = &svgascreen->cache;
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unsigned i;
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assert(cache->total_size == 0);
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(void) mtx_init(&cache->mutex, mtx_plain);
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for (i = 0; i < SVGA_HOST_SURFACE_CACHE_BUCKETS; ++i)
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list_inithead(&cache->bucket[i]);
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list_inithead(&cache->unused);
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list_inithead(&cache->validated);
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list_inithead(&cache->invalidated);
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list_inithead(&cache->empty);
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for (i = 0; i < SVGA_HOST_SURFACE_CACHE_SIZE; ++i)
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list_addtail(&cache->entries[i].head, &cache->empty);
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return PIPE_OK;
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}
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/**
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* Allocate a new host-side surface. If the surface is marked as cachable,
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* first try re-using a surface in the cache of freed surfaces. Otherwise,
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* allocate a new surface.
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* \param bind_flags bitmask of PIPE_BIND_x flags
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* \param usage one of PIPE_USAGE_x values
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* \param validated return True if the surface is a reused surface
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*/
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struct svga_winsys_surface *
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svga_screen_surface_create(struct svga_screen *svgascreen,
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unsigned bind_flags, enum pipe_resource_usage usage,
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boolean *validated,
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struct svga_host_surface_cache_key *key)
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{
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struct svga_winsys_screen *sws = svgascreen->sws;
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struct svga_winsys_surface *handle = NULL;
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boolean cachable = SVGA_SURFACE_CACHE_ENABLED && key->cachable;
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SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
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"%s sz %dx%dx%d mips %d faces %d arraySize %d cachable %d\n",
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__FUNCTION__,
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key->size.width,
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key->size.height,
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key->size.depth,
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key->numMipLevels,
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key->numFaces,
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key->arraySize,
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key->cachable);
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if (cachable) {
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/* Try to re-cycle a previously freed, cached surface */
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if (key->format == SVGA3D_BUFFER) {
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SVGA3dSurfaceAllFlags hint_flag;
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/* For buffers, round the buffer size up to the nearest power
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* of two to increase the probability of cache hits. Keep
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* texture surface dimensions unchanged.
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*/
|
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uint32_t size = 1;
|
|
while (size < key->size.width)
|
|
size <<= 1;
|
|
key->size.width = size;
|
|
|
|
/* Determine whether the buffer is static or dynamic.
|
|
* This is a bit of a heuristic which can be tuned as needed.
|
|
*/
|
|
if (usage == PIPE_USAGE_DEFAULT ||
|
|
usage == PIPE_USAGE_IMMUTABLE) {
|
|
hint_flag = SVGA3D_SURFACE_HINT_STATIC;
|
|
}
|
|
else if (bind_flags & PIPE_BIND_INDEX_BUFFER) {
|
|
/* Index buffers don't change too often. Mark them as static.
|
|
*/
|
|
hint_flag = SVGA3D_SURFACE_HINT_STATIC;
|
|
}
|
|
else {
|
|
/* Since we're reusing buffers we're effectively transforming all
|
|
* of them into dynamic buffers.
|
|
*
|
|
* It would be nice to not cache long lived static buffers. But there
|
|
* is no way to detect the long lived from short lived ones yet. A
|
|
* good heuristic would be buffer size.
|
|
*/
|
|
hint_flag = SVGA3D_SURFACE_HINT_DYNAMIC;
|
|
}
|
|
|
|
key->flags &= ~(SVGA3D_SURFACE_HINT_STATIC |
|
|
SVGA3D_SURFACE_HINT_DYNAMIC);
|
|
key->flags |= hint_flag;
|
|
}
|
|
|
|
handle = svga_screen_cache_lookup(svgascreen, key);
|
|
if (handle) {
|
|
if (key->format == SVGA3D_BUFFER)
|
|
SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
|
|
"reuse sid %p sz %d (buffer)\n", handle,
|
|
key->size.width);
|
|
else
|
|
SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
|
|
"reuse sid %p sz %dx%dx%d mips %d faces %d arraySize %d\n", handle,
|
|
key->size.width,
|
|
key->size.height,
|
|
key->size.depth,
|
|
key->numMipLevels,
|
|
key->numFaces,
|
|
key->arraySize);
|
|
*validated = TRUE;
|
|
}
|
|
}
|
|
|
|
if (!handle) {
|
|
/* Unable to recycle surface, allocate a new one */
|
|
unsigned usage = 0;
|
|
|
|
if (!key->cachable)
|
|
usage |= SVGA_SURFACE_USAGE_SHARED;
|
|
if (key->scanout)
|
|
usage |= SVGA_SURFACE_USAGE_SCANOUT;
|
|
if (key->coherent)
|
|
usage |= SVGA_SURFACE_USAGE_COHERENT;
|
|
|
|
handle = sws->surface_create(sws,
|
|
key->flags,
|
|
key->format,
|
|
usage,
|
|
key->size,
|
|
key->numFaces * key->arraySize,
|
|
key->numMipLevels,
|
|
key->sampleCount);
|
|
if (handle)
|
|
SVGA_DBG(DEBUG_CACHE|DEBUG_DMA,
|
|
" CREATE sid %p sz %dx%dx%d\n",
|
|
handle,
|
|
key->size.width,
|
|
key->size.height,
|
|
key->size.depth);
|
|
|
|
*validated = FALSE;
|
|
}
|
|
|
|
return handle;
|
|
}
|
|
|
|
|
|
/**
|
|
* Release a surface. We don't actually free the surface- we put
|
|
* it into the cache of freed surfaces (if it's cachable).
|
|
*/
|
|
void
|
|
svga_screen_surface_destroy(struct svga_screen *svgascreen,
|
|
const struct svga_host_surface_cache_key *key,
|
|
boolean to_invalidate,
|
|
struct svga_winsys_surface **p_handle)
|
|
{
|
|
struct svga_winsys_screen *sws = svgascreen->sws;
|
|
|
|
/* We only set the cachable flag for surfaces of which we are the
|
|
* exclusive owner. So just hold onto our existing reference in
|
|
* that case.
|
|
*/
|
|
if (SVGA_SURFACE_CACHE_ENABLED && key->cachable) {
|
|
svga_screen_cache_add(svgascreen, key, to_invalidate, p_handle);
|
|
}
|
|
else {
|
|
SVGA_DBG(DEBUG_DMA,
|
|
"unref sid %p (uncachable)\n", *p_handle);
|
|
sws->surface_reference(sws, p_handle, NULL);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Print/dump the contents of the screen cache. For debugging.
|
|
*/
|
|
void
|
|
svga_screen_cache_dump(const struct svga_screen *svgascreen)
|
|
{
|
|
const struct svga_host_surface_cache *cache = &svgascreen->cache;
|
|
unsigned bucket;
|
|
unsigned count = 0;
|
|
|
|
debug_printf("svga3d surface cache:\n");
|
|
for (bucket = 0; bucket < SVGA_HOST_SURFACE_CACHE_BUCKETS; bucket++) {
|
|
struct list_head *curr;
|
|
curr = cache->bucket[bucket].next;
|
|
while (curr && curr != &cache->bucket[bucket]) {
|
|
struct svga_host_surface_cache_entry *entry =
|
|
list_entry(curr, struct svga_host_surface_cache_entry,bucket_head);
|
|
if (entry->key.format == SVGA3D_BUFFER) {
|
|
debug_printf(" %p: buffer %u bytes\n",
|
|
entry->handle,
|
|
entry->key.size.width);
|
|
}
|
|
else {
|
|
debug_printf(" %p: %u x %u x %u format %u\n",
|
|
entry->handle,
|
|
entry->key.size.width,
|
|
entry->key.size.height,
|
|
entry->key.size.depth,
|
|
entry->key.format);
|
|
}
|
|
curr = curr->next;
|
|
count++;
|
|
}
|
|
}
|
|
|
|
debug_printf("%u surfaces, %u bytes\n", count, cache->total_size);
|
|
}
|