diff options
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_cp_dma.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_cp_dma.c b/src/gallium/drivers/radeonsi/si_cp_dma.c index 58093177b93..3e908f6e4c3 100644 --- a/src/gallium/drivers/radeonsi/si_cp_dma.c +++ b/src/gallium/drivers/radeonsi/si_cp_dma.c @@ -168,6 +168,7 @@ static void si_clear_buffer(struct pipe_context *ctx, struct pipe_resource *dst, enum r600_coherency coher) { struct si_context *sctx = (struct si_context*)ctx; + struct radeon_winsys *ws = sctx->b.ws; unsigned tc_l2_flag = get_tc_l2_flag(sctx, coher); unsigned flush_flags = get_flush_flags(sctx, coher); @@ -193,6 +194,25 @@ static void si_clear_buffer(struct pipe_context *ctx, struct pipe_resource *dst, return; } + /* dma_clear_buffer can use clear_buffer on failure. Make sure that + * doesn't happen. We don't want an infinite recursion: */ + if (sctx->b.chip_class >= CIK && sctx->b.dma.cs && + /* CP DMA is very slow. Always use SDMA for big clears. This + * alone improves DeusEx:MD performance by 70%. */ + (size > 128 * 1024 || + /* Buffers not used by the GFX IB yet will be cleared by SDMA. + * This happens to move most buffer clears to SDMA, including + * DCC and CMASK clears, because pipe->clear clears them before + * si_emit_framebuffer_state (in a draw call) adds them. + * For example, DeusEx:MD has 21 buffer clears per frame and all + * of them are moved to SDMA thanks to this. */ + !ws->cs_is_buffer_referenced(sctx->b.gfx.cs, + r600_resource(dst)->buf, + RADEON_USAGE_READWRITE))) { + sctx->b.dma_clear_buffer(ctx, dst, offset, size, value); + return; + } + uint64_t va = r600_resource(dst)->gpu_address + offset; /* Flush the caches. */ |