On 04.11.2015 08:46, Marek Olšák wrote:
>
> @@ -209,11 +211,48 @@ static void si_clear_buffer(struct pipe_context *ctx,
> struct pipe_resource *dst,
> r600_resource(dst)->TC_L2_dirty = true;
> }
>
> +/**
> + * Realign the CP DMA engine. This must be done after a copy with an
> unaligned
> + * size.
> + *
> + * \param size Remaining size to the CP DMA alignment.
> + */
> +static void si_cp_dma_realign_engine(struct si_context *sctx, unsigned size)
> +{
> + uint64_t va;
> + unsigned dma_flags = 0;
> + unsigned scratch_size = CP_DMA_ALIGNMENT * 2;
> +
> + assert(size < CP_DMA_ALIGNMENT);
> +
> + /* Use the scratch buffer as the dummy buffer. The 3D engine should be
> + * idle at this point.
> + */
> + if (!sctx->scratch_buffer ||
> + sctx->scratch_buffer->b.b.width0 < scratch_size) {
> + r600_resource_reference(&sctx->scratch_buffer, NULL);
> + sctx->scratch_buffer =
> + si_resource_create_custom(&sctx->screen->b.b,
> + PIPE_USAGE_DEFAULT,
> + scratch_size);
> + }
> +
> + si_cp_dma_prepare(sctx, &sctx->scratch_buffer->b.b,
> + &sctx->scratch_buffer->b.b, size, size, &dma_flags);
> +
> + va = sctx->scratch_buffer->gpu_address;
> + si_emit_cp_dma_copy_buffer(sctx, va, va + CP_DMA_ALIGNMENT, size,
> + dma_flags);
> +}
Should this update sctx->emit_scratch_reloc ?
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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