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r600g/radeonsi: Map transfer staging texture unsynchronized when possible 

The transfer staging texture is always freshly allocated, so for write-only
transfers we don't need to explicitly wait for the BO to become idle.

Squeezes a few hundered MB/s more out of x11perf -shmput500 with glamor.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Michel Dänzer 2014-04-15 14:45:13 +09:00 committed by Michel Dänzer
parent 9fed627234
commit 6ac5a5e383
1 changed files with 2 additions and 0 deletions
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2
src/gallium/drivers/radeon/r600_texture.c
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@ -1039,6 +1039,8 @@ static void *r600_texture_transfer_map(struct pipe_context *ctx,
if (trans->staging) {
buf = trans->staging;
if (!rtex->is_depth && !(usage & PIPE_TRANSFER_READ))
usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
} else {
buf = &rtex->resource;
}