Messages in this thread | | | Date | Tue, 6 Mar 2001 12:21:04 +1300 | From | Chris Wedgwood <> | Subject | Re: The IO problem on multiple PCI busses |
| |
On Thu, Mar 01, 2001 at 11:09:00AM -0800, David S. Miller wrote:
I think a cleaner scheme is to allow mmap() on /proc/bus/pci/${BUS}/${DEVICE} nodes, that is much cleaner and solves transparently any "different word size between userland and kernel" issues (specifically 32-bit userlands executing on 64-bit kernels).
This works great for when you want to do IO cycles from userland; but what about the case of hardware which requires IO cycles from a device driver for some very non-video hardware that may support multiple cards across multiple busses?
Or do I not understand?
--cw - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |