On Sat, Oct 03, 2015 at 06:51:06AM +1000, Benjamin Herrenschmidt wrote: > On Fri, 2015-10-02 at 13:09 -0700, Nishanth Aravamudan wrote: > > > 1) add a generic dma_get_page_shift implementation that just returns > > PAGE_SHIFT > > So you chose to return the granularity of the iommu to the driver > rather than providing a way for the driver to request a specific > alignment for DMA mappings. Any specific reason ?
At least for NVMe that's the way to go - it allows to set a page set in the device which should fit the IOMMU page size. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
