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Date: Tue, 09 Sep 2008 17:24:42 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Jeff Brower <jbrower@signalogic.com>
Subject: Re: driver replacements for kmalloc and __pa()
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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