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gallium/radeon: don't flush the GFX IB if DMA doesn't depend on it

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Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-04-28 18:06:55 +02:00
parent fb89f06698
commit 2b58bc4461
1 changed files with 8 additions and 2 deletions
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10
src/gallium/drivers/radeon/r600_pipe_common.c
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@ -154,8 +154,14 @@ void r600_need_dma_space(struct r600_common_context *ctx, unsigned num_dw,
gtt += src->buf->size;
}
/* Flush the GFX IB if it's not empty. */
if (ctx->gfx.cs->cdw > ctx->initial_gfx_cs_size)
/* Flush the GFX IB if DMA depends on it. */
if (ctx->gfx.cs->cdw > ctx->initial_gfx_cs_size &&
((dst &&
ctx->ws->cs_is_buffer_referenced(ctx->gfx.cs, dst->buf,
RADEON_USAGE_READWRITE)) ||
(src &&
ctx->ws->cs_is_buffer_referenced(ctx->gfx.cs, src->buf,
RADEON_USAGE_WRITE))))
ctx->gfx.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
/* Flush if there's not enough space, or if the memory usage per IB