On Fri, Oct 10, 2008 at 04:32:07PM +0900, FUJITA Tomonori wrote: ... > > > Well, that's because I wrote gart's alloc_coherent and introduced > > > dma_alloc_coherent_mask. ;) > > > > oh. it is in tip > > Yeah, it's in tip. But the current gart code uses coherent_dma_mask > properly (GART in tip works in the same way as the current > GART). IIRC, other X86 hardware IOMMUs (VT-d, Calgary, AMD) uses > dma_mask in dma_alloc_coherent (AMD in tip uses coherent_dma_mask). This is a bug. Care to submit a patch to fix it? I don't have any of the docs or HW (VT-d, Calgary) to test it. > > then can we remove consistent_dma_mask? just use dma_mask instead for all. > > I don't think we can. One architecture needs it. The above usb > chip seems to need it. As noted before, several PCI-X devices support 64-bit DMA for payload data but only 32-bit DMA for control data. thanks, grant -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
