DMA transfer into sk_buff - cached memory question

Eugene Surovegin ebs at
Wed Mar 10 08:28:28 EST 2004

On Tue, Mar 09, 2004 at 01:02:54PM -0800, John Feller wrote:
> > Please, read Documentation/DMA-mapping.txt.
> Ah - I'm an idiot.  I had read about "pci_map_single", but it didn't occur
> to me that it could be used after memory was kmalloc'd elsewhere.  Looked at
> some existing networking code (tulip driver) to see how it is done.  The
> "pci" in the name confused me, I guess :o}

BTW, if your driver will only run on 4xx hardware you can use
consistent_* routines (PCI DMA API is implemented using them).

Take a look at drivers/net/ibm_emac for example.


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