Re: DMA transfers in 2.5.67
Alan Cox (alan@lxorguk.ukuu.org.uk)
15 Apr 2003 21:48:35 +0100
On Maw, 2003-04-15 at 22:38, Måns Rullgård wrote:
> It's an Alpha with 768 MB. Is it the pci_alloc_* functions you are
> referring to? I don't think they are used currently. How much memory
> can these allocate? I need chunks of up to 1 MB, not necessarily
> phycically continuous.
>
> What do those functions do that normal memory allocation does not?
> Apart from setting up sg mappings, that is.
A normal memory allocation might not be visible from the device, however
pci_map_sg() deals with such things. What I really meant was are you
using the pci_ DMA functionality
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