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authorJosé Fonseca <jfonseca@vmware.com>2009-08-21 09:51:44 +0100
committerJosé Fonseca <jfonseca@vmware.com>2009-08-29 09:21:39 +0100
commitf10ee9a0a1f75dfbf4f2ed1407b55a2511b61a48 (patch)
tree3d5dc7bb7aa58ba57587c98f80892b56c0746444 /src/gallium/drivers/llvmpipe/lp_tile_cache.c
parent87c383a2e5cbd026966e29c4a869617d4d4da255 (diff)
llvmpipe: Don't limit the number of tiles in the cache.
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_tile_cache.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_tile_cache.c256
1 files changed, 84 insertions, 172 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_tile_cache.c b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
index badfbf4087..23bf608857 100644
--- a/src/gallium/drivers/llvmpipe/lp_tile_cache.c
+++ b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
@@ -44,60 +44,17 @@
#include "lp_tile_cache.h"
-
-/**
- * Return the position in the cache for the tile that contains win pos (x,y).
- * We currently use a direct mapped cache so this is like a hack key.
- * At some point we should investige something more sophisticated, like
- * a LRU replacement policy.
- */
-#define CACHE_POS(x, y) \
- (((x) + (y) * 5) % NUM_ENTRIES)
-
-
-
-/**
- * Is the tile at (x,y) in cleared state?
- */
-static INLINE uint
-is_clear_flag_set(const uint *bitvec, union tile_address addr)
-{
- int pos, bit;
- pos = addr.bits.y * (MAX_WIDTH / TILE_SIZE) + addr.bits.x;
- assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
- bit = bitvec[pos / 32] & (1 << (pos & 31));
- return bit;
-}
-
-
-/**
- * Mark the tile at (x,y) as not cleared.
- */
-static INLINE void
-clear_clear_flag(uint *bitvec, union tile_address addr)
-{
- int pos;
- pos = addr.bits.y * (MAX_WIDTH / TILE_SIZE) + addr.bits.x;
- assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
- bitvec[pos / 32] &= ~(1 << (pos & 31));
-}
-
-
struct llvmpipe_tile_cache *
lp_create_tile_cache( struct pipe_screen *screen )
{
struct llvmpipe_tile_cache *tc;
- uint pos;
-
- tc = align_malloc( sizeof(struct llvmpipe_tile_cache), 16 );
- if (tc) {
- memset(tc, 0, sizeof *tc);
- tc->screen = screen;
- for (pos = 0; pos < NUM_ENTRIES; pos++) {
- tc->entries[pos].addr.bits.invalid = 1;
- }
- tc->last_tile = &tc->entries[0]; /* any tile */
- }
+
+ tc = CALLOC_STRUCT( llvmpipe_tile_cache );
+ if(!tc)
+ return NULL;
+
+ tc->screen = screen;
+
return tc;
}
@@ -106,17 +63,23 @@ void
lp_destroy_tile_cache(struct llvmpipe_tile_cache *tc)
{
struct pipe_screen *screen;
- uint pos;
+ unsigned x, y;
+
+ for (y = 0; y < MAX_HEIGHT; y += TILE_SIZE) {
+ for (x = 0; x < MAX_WIDTH; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
- for (pos = 0; pos < NUM_ENTRIES; pos++) {
- /*assert(tc->entries[pos].x < 0);*/
+ if(tile->color)
+ align_free(tile->color);
+ }
}
+
if (tc->transfer) {
screen = tc->transfer->texture->screen;
screen->tex_transfer_destroy(tc->transfer);
}
- align_free( tc );
+ FREE( tc );
}
@@ -146,11 +109,23 @@ lp_tile_cache_set_surface(struct llvmpipe_tile_cache *tc,
if (ps) {
struct pipe_screen *screen = ps->texture->screen;
+ unsigned x, y;
tc->transfer = screen->get_tex_transfer(screen, ps->texture, ps->face,
ps->level, ps->zslice,
PIPE_TRANSFER_READ_WRITE,
0, 0, ps->width, ps->height);
+
+ for (y = 0; y < ps->height; y += TILE_SIZE) {
+ for (x = 0; x < ps->width; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+
+ tile->status = LP_TILE_STATUS_UNDEFINED;
+
+ if(!tile->color)
+ tile->color = align_malloc( TILE_SIZE*TILE_SIZE*NUM_CHANNELS, 16 );
+ }
+ }
}
}
@@ -206,24 +181,33 @@ clear_tile(struct llvmpipe_cached_tile *tile,
/**
- * Actually clear the tiles which were flagged as being in a clear state.
+ * Flush the tile cache: write all dirty tiles back to the transfer.
+ * any tiles "flagged" as cleared will be "really" cleared.
*/
-static void
-lp_tile_cache_flush_clear(struct llvmpipe_tile_cache *tc)
+void
+lp_flush_tile_cache(struct llvmpipe_tile_cache *tc)
{
struct pipe_transfer *pt = tc->transfer;
- struct pipe_screen *screen = pt->texture->screen;
- const uint w = tc->transfer->width;
- const uint h = tc->transfer->height;
- uint x, y;
- uint numCleared = 0;
+ unsigned x, y;
+
+ if(!pt)
+ return;
/* push the tile to all positions marked as clear */
- for (y = 0; y < h; y += TILE_SIZE) {
- for (x = 0; x < w; x += TILE_SIZE) {
- union tile_address addr = tile_address(x, y, 0, 0, 0);
+ for (y = 0; y < pt->height; y += TILE_SIZE) {
+ for (x = 0; x < pt->width; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+
+ switch(tile->status) {
+ case LP_TILE_STATUS_UNDEFINED:
+ break;
- if (is_clear_flag_set(tc->clear_flags, addr)) {
+ case LP_TILE_STATUS_CLEAR: {
+ /**
+ * Actually clear the tiles which were flagged as being in a clear state.
+ */
+
+ struct pipe_screen *screen = pt->texture->screen;
unsigned tw = TILE_SIZE;
unsigned th = TILE_SIZE;
void *dst;
@@ -240,51 +224,16 @@ lp_tile_cache_flush_clear(struct llvmpipe_tile_cache *tc)
x, y, tw, th,
tc->clear_val);
- /* do this? */
- clear_clear_flag(tc->clear_flags, addr);
-
- numCleared++;
+ screen->transfer_unmap(screen, pt);
+ break;
}
- }
- }
-#if 0
- debug_printf("num cleared: %u\n", numCleared);
-#endif
-}
-
-/**
- * Flush the tile cache: write all dirty tiles back to the transfer.
- * any tiles "flagged" as cleared will be "really" cleared.
- */
-void
-lp_flush_tile_cache(struct llvmpipe_tile_cache *tc)
-{
- struct pipe_transfer *pt = tc->transfer;
- int inuse = 0, pos;
-
- if (pt) {
- /* caching a drawing transfer */
- for (pos = 0; pos < NUM_ENTRIES; pos++) {
- struct llvmpipe_cached_tile *tile = tc->entries + pos;
- if (!tile->addr.bits.invalid) {
- lp_put_tile_rgba_soa(pt,
- tile->addr.bits.x * TILE_SIZE,
- tile->addr.bits.y * TILE_SIZE,
- tile->color);
- tile->addr.bits.invalid = 1; /* mark as empty */
- inuse++;
+ case LP_TILE_STATUS_DEFINED:
+ lp_put_tile_rgba_soa(pt, x, y, tile->color);
+ break;
}
}
-
-#if TILE_CLEAR_OPTIMIZATION
- lp_tile_cache_flush_clear(tc);
-#endif
}
-
-#if 0
- debug_printf("flushed tiles in use: %d\n", inuse);
-#endif
}
@@ -293,69 +242,35 @@ lp_flush_tile_cache(struct llvmpipe_tile_cache *tc)
* \param x, y position of tile, in pixels
*/
void *
-lp_find_cached_tile(struct llvmpipe_tile_cache *tc,
- union tile_address addr )
+lp_get_cached_tile(struct llvmpipe_tile_cache *tc,
+ unsigned x, unsigned y )
{
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
struct pipe_transfer *pt = tc->transfer;
- /* cache pos/entry: */
- const int pos = CACHE_POS(addr.bits.x,
- addr.bits.y);
- struct llvmpipe_cached_tile *tile = tc->entries + pos;
-
- if (addr.value != tile->addr.value) {
-
- if (tile->addr.bits.invalid == 0) {
- /* put dirty tile back in framebuffer */
- lp_put_tile_rgba_soa(pt,
- tile->addr.bits.x * TILE_SIZE,
- tile->addr.bits.y * TILE_SIZE,
- tile->color);
- }
-
- tile->addr = addr;
-
- if (is_clear_flag_set(tc->clear_flags, addr)) {
- /* don't get tile from framebuffer, just clear it */
- clear_tile(tile, tc->clear_color);
- clear_clear_flag(tc->clear_flags, addr);
- }
- else {
- /* get new tile data from transfer */
- lp_get_tile_rgba_soa(pt,
- tile->addr.bits.x * TILE_SIZE,
- tile->addr.bits.y * TILE_SIZE,
- tile->color);
- }
+ switch(tile->status) {
+ case LP_TILE_STATUS_CLEAR:
+ /* don't get tile from framebuffer, just clear it */
+ clear_tile(tile, tc->clear_color);
+ tile->status = LP_TILE_STATUS_DEFINED;
+ break;
+
+ case LP_TILE_STATUS_UNDEFINED:
+ /* get new tile data from transfer */
+ lp_get_tile_rgba_soa(pt, x, y, tile->color);
+ tile->status = LP_TILE_STATUS_DEFINED;
+ break;
+
+ case LP_TILE_STATUS_DEFINED:
+ /* nothing to do */
+ break;
}
- tc->last_tile = tile;
-
return tile->color;
}
/**
- * Given the texture face, level, zslice, x and y values, compute
- * the cache entry position/index where we'd hope to find the
- * cached texture tile.
- * This is basically a direct-map cache.
- * XXX There's probably lots of ways in which we can improve this.
- */
-static INLINE uint
-tex_cache_pos( union tile_address addr )
-{
- uint entry = (addr.bits.x +
- addr.bits.y * 9 +
- addr.bits.z * 3 +
- addr.bits.face +
- addr.bits.level * 7);
-
- return entry % NUM_ENTRIES;
-}
-
-
-/**
* When a whole surface is being cleared to a value we can avoid
* fetching tiles above.
* Save the color and set a 'clearflag' for each tile of the screen.
@@ -364,24 +279,21 @@ void
lp_tile_cache_clear(struct llvmpipe_tile_cache *tc, const float *rgba,
uint clearValue)
{
- unsigned chan;
- uint pos;
+ struct pipe_transfer *pt = tc->transfer;
+ const unsigned w = pt->width;
+ const unsigned h = pt->height;
+ unsigned x, y, chan;
for(chan = 0; chan < 4; ++chan)
tc->clear_color[chan] = float_to_ubyte(rgba[chan]);
tc->clear_val = clearValue;
-#if TILE_CLEAR_OPTIMIZATION
- /* set flags to indicate all the tiles are cleared */
- memset(tc->clear_flags, 255, sizeof(tc->clear_flags));
-#else
- /* disable the optimization */
- memset(tc->clear_flags, 0, sizeof(tc->clear_flags));
-#endif
-
- for (pos = 0; pos < NUM_ENTRIES; pos++) {
- struct llvmpipe_cached_tile *tile = tc->entries + pos;
- tile->addr.bits.invalid = 1;
+ /* push the tile to all positions marked as clear */
+ for (y = 0; y < h; y += TILE_SIZE) {
+ for (x = 0; x < w; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+ tile->status = LP_TILE_STATUS_CLEAR;
+ }
}
}