On Wed, Oct 30, 2024 at 06:41:21PM -0700, Randy Dunlap wrote: > (nits) > > On 10/30/24 8:12 AM, Leon Romanovsky wrote: > > From: Christoph Hellwig <hch@xxxxxx> > > > > Add an explanation of the newly added IOVA-based mapping API. > > > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx> > > --- > > Documentation/core-api/dma-api.rst | 70 ++++++++++++++++++++++++++++++ > > 1 file changed, 70 insertions(+) <...> > > +These APIs allow a very efficient mapping when using an IOMMU. They are an > > +optional path that requires extra code and are only recommended for drivers > > +where DMA mapping performance, or the space usage for storing the DMA addresses > > +matter. All the consideration from the previous section apply here as well. > > considerations <...> > > +is used to unmap a range previous mapped, and > > previously Thanks
