From: Christoph Hellwig <[EMAIL PROTECTED]> Date: Wed, 2 May 2007 23:48:58 +0100
> On Wed, May 02, 2007 at 01:02:41PM -0700, Michael Chan wrote: > > Let's say I have a 32-bit card that cannot do dual address cycle on a > > 64-bit dma_addr_t system without IOMMU. If CONFIG_HIGHMEM is not set, > > wouldn't the device get > 32-bit DMA addresses that it cannot handle? > > It needs to set it's dma mask to 32bits and the upper layers (net, block) > will do the bouncing for it. Not the case for networking, we rely upon the DMA API to take care of things, which it does. - 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
