Messages in this thread | | | Date | Fri, 28 Feb 2003 07:34:41 -0800 | From | "Martin J. Bligh" <> | Subject | Re: Proposal: Eliminate GFP_DMA |
| |
>> > > umm. are you volunteering to convert drivers/net/macmace.c to the pci_* >> > > API then? also, GFP_DMA is used on, eg, s390 to get memory below 2GB and >> > > on ia64 to get memory below 4GB. >> > >> > The ia64 is a fine example of how broken it is. People have to hack around >> > with GFP_DMA meaning different things on ia64 to everything else. It needs >> > to die. >> >> At least on x86-64 it is still needed when you need have some hardware >> with address limits < 4GB (e.g. an 24bit soundcard) >> >> pci_* on K8 only allows address mask 0xffffffff or unlimited. > > That's a bit broken... I have an ALS4000 PCI soundcard that is a 24-bit > soundcard. pci_set_dma_mask should support 24-bits accordingly, > otherwise it's a bug in your platform implementation... Nobody will be > able to use certain properly-written drivers on your platform otherwise.
If we're going to really sort this out, would be nice to just pass an upper bound for an address to __alloc_pages, instead of a simple bitmask ;-)
M.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |