driver replacements for kmalloc and __pa()

[Scott Wood]

Jeff Brower wrote:
> 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.

-Scott