On Wed, Dec 06, 2006 at 10:16:44AM -0800, Stephen Hemminger wrote: > I think it is really only an issue for drivers that turn on HIGH_DMA > and have limited mask values. The majority of drivers either only > handle 32 bit (!HIGH_DMA) or do full 64 bit mapping. I don't know > the details of how we manage IOMMU, but doesn't mapping always work > for those drivers.
It's up to an IOMMU (DMA-API) implementation to define what constitutes a mapping error, e.g., Calgary and GART on x86-64 will return bad_dma_address from the mapping functions when they run out of entries in the IO space, which can happen regardless of the mask. Cheers, Muli - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
