Scott- > > What are the up-to-date APIs we should be using for DMA memory allocation > > and > > virtual-to-physical address translation? We have another driver for > > another device > > that's working fine on this board and it uses pci_alloc_consistent(). What > > about > > bus_space_vaddr()? I'm hoping to get a recommendation for what's currently > > appropriate and most future-proof for drivers that depend on external PCI > > DMA. > > Documentation/DMA-API.txt.
Thanks very much Scott. It appears that dma_alloc_coherent() is the recommended path. Is there a good reason to use this instead of pci_alloc_consistent()? I can find comments about using the GFP_KERNEL flag with dma_alloc_coherent(), which is supposed to help when the system is low on memory. But we wouldn't expect that to occur in a situation where the driver is loaded/initialized at boot-time. -Jeff _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
