On Thu, 25 Sep 2003, Eugene Surovegin wrote: > At 12:56 PM 9/25/2003, Matt Porter wrote: > >When a buffer is allocated using the allowed methods (as defined in > >DMA-mapping.txt) to obtain memory for use in DMA, there is > >no guarantee that the buffer is cacheline aligned. > > Hmm, I don't think this is true. > > DMA-mapping.txt explicitly states that pci_alloc_consistent() returns > aligned memory buffer:
It has been cut from the conversation, but I'm using streaming DMA mappings. Specifically, pci_map_single() and pci_unmap_single(). My reading of the 2.4 DMA-mapping.txt is that use of pci_alloc_consistent() is specific to Consistent DMA mappings. Same for the pci_pool_ interface. -Bret -- Bret Indrelee QLogic Corporation Bret.Indrelee at qlogic.com 6321 Bury Drive, St 13, Eden Prairie, MN 55346 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
