On Mon, 1 Aug 2005, Ivan Kokshaysky wrote:
> On Fri, Jul 29, 2005 at 02:39:21AM -0700, Andrew Morton wrote:
> > Tero Roponen <[email protected]> wrote:
> > > My original report is here: http://lkml.org/lkml/2005/7/6/174
> >
> > I see. Ivan, do we know what's going on here?
>
> Sort of. The 4K cardbus windows are working fine for non-x86
> architectures where all IO resources are usually well known
> and added to the resource tree properly.
> However, on x86 there are sometimes "hidden" system IO port
> ranges that aren't reported by BIOS, so the large (4K) cardbus
> windows overlap these ranges.
>
> Actually I don't like reducing CARDBUS_IO_SIZE to 256 bytes, because
> we lose an ability to handle cards with built-in p2p bridges (which
> require 4K for IO), plus it won't fix Sony VAIO problem.
>
> Tero and Mikael, can you try this one-liner instead?
>
> Ivan.
>
> --- 2.6.13-rc4/include/asm-i386/pci.h Sun Jul 31 14:32:09 2005
> +++ linux/include/asm-i386/pci.h Mon Aug 1 08:29:18 2005
> @@ -18,7 +18,7 @@ extern unsigned int pcibios_assign_all_b
> #define pcibios_scan_all_fns(a, b) 0
>
> extern unsigned long pci_mem_start;
> -#define PCIBIOS_MIN_IO 0x1000
> +#define PCIBIOS_MIN_IO 0x2000
> #define PCIBIOS_MIN_MEM (pci_mem_start)
>
> #define PCIBIOS_MIN_CARDBUS_IO 0x4000
>
Thanks, this works for me!
I hope this will be in 2.6.13 final.
-
Tero Roponen
-
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