On Mon, Feb 26, 2024 at 07:33:29PM +0800, Xuan Zhuo wrote:
> > what is dma_map_direct? can't find it in the tree.
>
> YES.
>
>
> diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
> index 58db8fd70471..5a8f7a927aa1 100644
> --- a/kernel/dma/mapping.c
> +++ b/kernel/dma/mapping.c
> @@ -144,6 +144,18 @@ static inline bool dma_map_direct(struct device *dev,
> return dma_go_direct(dev, *dev->dma_mask, ops);
> }
>
> +bool dma_is_direct(struct device *dev)
> +{
> + if (!dma_map_direct(dev, ops))
> + return false;
> +
> + if (is_swiotlb_force_bounce(dev))
> + return false;
> +
> + return true;
> +}
> +EXPORT_SYMBOL(dma_unmap_page_attrs);
> +
>
> Thanks.
where is it? linux-next?
--
MST
