On Sun, 17 Feb 2008 23:41:42 -0800 (PST) David Miller <[EMAIL PROTECTED]> wrote:
> From: FUJITA Tomonori <[EMAIL PROTECTED]> > Date: Sat, 16 Feb 2008 15:03:43 +0900 > > > [PATCH] sparc64: make IOMMU code respect the segment boundary limits > > > > Signed-off-by: FUJITA Tomonori <[EMAIL PROTECTED]> > > Looks good, but I think it will break sound for some ALI chips. > > Please see arch/sparc64/kernel/pci.c:ali_sound_dma_hack() > and it's caller pci_dma_supported(). Could you explain the problem a little more? The shift argument is only used as an offset when iommu-helper decides whether a memory area (index plus npages) spanning LLD's segment boudnary size or not. For example, if a device's segment boudary size is 64K, the helper see the following value is larger than 64K or not: ((the offset + index of the IOMMU table) ((64K / 8K) - 1) + npages -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
