Re: [RFC] generic device DMA implementation

Oliver Xymoron (oxymoron@waste.org)
Fri, 6 Dec 2002 15:04:45 -0600


On Fri, Dec 06, 2002 at 10:42:21AM -0800, David S. Miller wrote:
> From: James Bottomley <James.Bottomley@steeleye.com>
> Date: Fri, 06 Dec 2002 12:40:49 -0600
>
> Yes, we've discussed that too...but not come to a conclusion. The problem is
> really that if you call dma_alloc and pass in the DMA_CONFORMANCE_NON_CONSISTEN
> T flag, what you're saying is "This driver implements all the correct cache
> flushes and can cope with inconsistent memory. Please give me the type of
> memory that's most efficient for the platform I'm running on.". The driver
> isn't asking give me a specific type of memory, it's telling the platform what
> it's capabilities are.
>
> Any thoughts on naming would be most welcome.
>
> How about just making a dma_alloc_$(NEWNAME)(), and consistent ports
> can just alias that to dma_alloc_consistent()?
>
> The only question is $(NEWNAME). "inconsistent" might be ok, but it's
> maybe too similar to "consistent" for my taste.

Can we do pci_alloc_consistent -> dma_alloc? Then regardless of what
you name the other one, the consistent version will obviously be prefered.

-- 
 "Love the dolphins," she advised him. "Write by W.A.S.T.E.." 
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