On Fri, Jan 14, 2011 at 03:09:03PM +0200, Eli Cohen wrote: > CX devices are 64 bit devices with respect to the PCI bus. As far as I > know, a 64 bit PCI device memory space, could be placed anywhere in > that space regardless of the CPU architecture. So I think it would > be
Linux limits the addresses of PCI devices to phys_addr_t, so if your device is placed outside phys_addr_t by the BIOS then it will be discarded during discovery. Thus phys_addr_t/resource_size_t is appropriate for storing BAR addresses from PCI devices. > Regardless of whether what I say above is correct or not, wouldn't it > be nicer to to define pfn as either u64 or phys_addr_t and avoid the > casting? Good point, the pfn must be stored as phys_addr_t too, otherwise you only support a 44 bit physical address space before truncatation occures. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
