On Thu, Feb 15, 2007 at 11:15:21AM +0900, Isaku Yamahata wrote:
[...]
Probably the ia64 counter part is phys_to_machine_for_dma().
It convers pseudo physical address to machine address.
In general, device drivers shouldn't call phys_to_machine() directly.
For dma, device drivers should use dma api.
For IO area access, device drivers should use ioremap()/iounmap().
This is only the theory and presumably you already know it.
The device which you are playing with might have strange aspects,
I guess.
IIRC the Quadrics cards are designed to be programmed directly by the user.
They therefore have an MMU, which has to be updated. Not a really simple
driver !
Tristan.
4 messages in com.xensource.lists.xen-ia64-develRe: [Xen-ia64-devel] where's phys_to_...