Hi Vinod,
On Sunday 21 February 2016 20:50:46 Vinod Koul wrote:
> The slave dmaengine semantics required the client to map dma
> addresses and pass DMA address to dmaengine drivers. While this
s/While this/This/ ?
> was a convenient notion coming from generic dma offload cases
> where dmaengines are interchangeable and client is not aware of
> which engine to map to.
>
> But in case of slave, we know the dmaengine and always use a
> specific one. Further the IOMMU cases can lead to failure of this
> notion, so make this as physical address and now dmaengine driver
> will do the required mapping.
You could also add "This finally bring the code in sync with the
documentation.".
> Original-patch-by: Linus Walleij <linus.wall...@linaro.org>
> Signed-off-by: Vinod Koul <vinod.k...@intel.com>
It took a long time but we finally got there :-) Thank you.
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> include/linux/dmaengine.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 16a1cad30c33..d85ecd20af50 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -357,8 +357,8 @@ enum dma_slave_buswidth {
> */
> struct dma_slave_config {
> enum dma_transfer_direction direction;
> - dma_addr_t src_addr;
> - dma_addr_t dst_addr;
> + phys_addr_t src_addr;
> + phys_addr_t dst_addr;
> enum dma_slave_buswidth src_addr_width;
> enum dma_slave_buswidth dst_addr_width;
> u32 src_maxburst;
--
Regards,
Laurent Pinchart
