On 29/10/2020 04:21, Christoph Hellwig wrote:
On Wed, Oct 28, 2020 at 05:55:23PM +1100, Alexey Kardashevskiy wrote:
It is passing an address of the end of the mapped area so passing a page
struct means passing page and offset which is an extra parameter and we do
not want to do anything
On Wed, Oct 28, 2020 at 05:55:23PM +1100, Alexey Kardashevskiy wrote:
>
> It is passing an address of the end of the mapped area so passing a page
> struct means passing page and offset which is an extra parameter and we do
> not want to do anything with the page in those hooks anyway so I'd
On 28/10/2020 03:48, Christoph Hellwig wrote:
+static inline bool dma_handle_direct(struct device *dev, dma_addr_t dma_handle)
+{
+ return dma_handle >= dev->archdata.dma_offset;
+}
This won't compile except for powerpc, and directly accesing arch members
in common code is a bad idea.
> +static inline bool dma_handle_direct(struct device *dev, dma_addr_t
> dma_handle)
> +{
> + return dma_handle >= dev->archdata.dma_offset;
> +}
This won't compile except for powerpc, and directly accesing arch members
in common code is a bad idea. Maybe both your helpers need to be
At the moment we allow bypassing DMA ops only when we can do this for
the entire RAM. However there are configs with mixed type memory
where we could still allow bypassing IOMMU in most cases;
POWERPC with persistent memory is one example.
This adds another check for the bus limit to determine
