[Linux-ia64] Re: [patch] support 64 bit pci_alloc_consistent

James Bottomley
2003-05-18T14:28:45Z

On Sun, 2003-05-18 at 09:21, Arjan van de Ven wrote:
> On Sun, May 18, 2003 at 09:17:48AM -0500, James Bottomley wrote:
> > (it uses 32 bit addr and 32 bit len descriptors, but reduces len to 24
> > bits to steal the extra byte for 7 bits extra addressing). However, it
> > is forced to request the full 64 bit address mask---I've never worked
> > out what will happen to it on a machine with more than 512GB memory.
>
> Uh??? right now even in 2.4 arbitrary bitmasks are supported for
> non-coherent memory.

Ah, my mistake. I keep forgetting there are two of these drivers in the
aic7xxx directory. The 79xx does have a 64 bit descriptor and sets the
full width. The 7xxx doesn't and sets a partial width.

Sorry,

James