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dmaengine: rcar-dmac: Widen DMA mask to 40 bits
authorGeert Uytterhoeven <geert+renesas@glider.be>
Mon, 13 Feb 2017 11:00:26 +0000 (12:00 +0100)
committerVinod Koul <vinod.koul@intel.com>
Tue, 14 Feb 2017 07:53:02 +0000 (13:23 +0530)
commitdc312349e87526dfe6387c1a82fafded706f0572
tree47bdb8a763db24ffa0007782098e7591c745db1etree | snapshot (tar.gz zip)
parentc429ceb1e18252122ba96b52e689dcf87103c186commit | diff
dmaengine: rcar-dmac: Widen DMA mask to 40 bits

By default, the DMA mask covers only the low 32-bit address space, which
causes SWIOTLB on arm64 to fall back to a bounce buffer for DMA
transfers involving memory outside the 32-bit address space.

The R-Car DMA controller hardware supports a 40-bit address space, hence
widen the DMA mask to 40 bits to actually make use of this feature.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/sh/rcar-dmac.c diff | blob | blame | history