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gallium/radeon: discard CMASK or DCC if overwriting a whole texture by DMA

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v2: simplify the conditionals

Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-04-28 19:22:28 +02:00
parent 2f173b8e13
commit f475c9fb07
1 changed files with 39 additions and 7 deletions
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46
src/gallium/drivers/radeon/r600_texture.c
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@ -32,6 +32,23 @@
#include <errno.h>
#include <inttypes.h>
static void r600_texture_discard_dcc(struct r600_common_screen *rscreen,
struct r600_texture *rtex);
static void r600_texture_discard_cmask(struct r600_common_screen *rscreen,
struct r600_texture *rtex);
static bool range_covers_whole_texture(struct pipe_resource *tex,
unsigned level, unsigned x, unsigned y,
unsigned z, unsigned width,
unsigned height, unsigned depth)
{
return x == 0 && y == 0 && z == 0 &&
width == u_minify(tex->width0, level) &&
height == u_minify(tex->height0, level) &&
depth == util_max_layer(tex, level) + 1;
}
bool r600_prepare_for_dma_blit(struct r600_common_context *rctx,
struct r600_texture *rdst,
unsigned dst_level, unsigned dstx,
@ -61,21 +78,36 @@ bool r600_prepare_for_dma_blit(struct r600_common_context *rctx,
/* DCC as:
* src: Use the 3D path. DCC decompression is expensive.
* dst: If overwriting the whole texture, disable DCC and use SDMA.
* dst: If overwriting the whole texture, discard DCC and use SDMA.
* Otherwise, use the 3D path.
* TODO: handle the case when the dst box covers the whole texture
*/
if (rsrc->dcc_offset || rdst->dcc_offset)
if (rsrc->dcc_offset)
return false;
if (rdst->dcc_offset) {
/* We can't discard DCC if the texture has been exported. */
if (rdst->resource.is_shared ||
!range_covers_whole_texture(&rdst->resource.b.b, dst_level,
dstx, dsty, dstz, src_box->width,
src_box->height, src_box->depth))
return false;
r600_texture_discard_dcc(rctx->screen, rdst);
}
/* CMASK as:
* src: Both texture and SDMA paths need decompression. Use SDMA.
* dst: If overwriting the whole texture, deallocate CMASK and use
* dst: If overwriting the whole texture, discard CMASK and use
* SDMA. Otherwise, use the 3D path.
* TODO: handle the case when the dst box covers the whole texture
*/
if (rdst->cmask.size && rdst->dirty_level_mask & (1 << dst_level))
return false;
if (rdst->cmask.size && rdst->dirty_level_mask & (1 << dst_level)) {
if (!range_covers_whole_texture(&rdst->resource.b.b, dst_level,
dstx, dsty, dstz, src_box->width,
src_box->height, src_box->depth))
return false;
r600_texture_discard_cmask(rctx->screen, rdst);
}
/* All requirements are met. Prepare textures for SDMA. */
if (rsrc->cmask.size && rsrc->dirty_level_mask & (1 << src_level))