On Wed, Jan 30, 2013 at 03:36:48PM -0600, Steve Wise wrote: > I wonder, then, what the correct service is to get the cpu physical > address from a kernel virtual address returned from > dma_alloc_coherent()? I think this is correct as-is, since I think > dma_alloc_coherent() falls under the "directly mapped" addresses in > the virt_to_phys() prototype comment.
DMA-API.txt says: This routine allocates a region of <size> bytes of consistent memory. It also returns a <dma_handle> which may be cast to an unsigned integer the same width as the bus and used as the physical address base of the region. So instead of virt_to_phys you should use dma_addr?? I think the note about 'directly mapped' refers to things the arch setups during early boot, not dma_alloc stuff. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
