linux-kernel - Re: [PATCH] ata: libata depends on HAS

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Date:	Tue, 12 May 2009 20:30:27 -0700
From:	Brad Boyer <flar@...andria.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	takata@...ux-m32r.org, geert@...ux-m68k.org,
	linux-m68k@...ts.linux-m68k.org, ysato@...rs.sourceforge.jp
Subject: Re: [PATCH] ata: libata depends on HAS_DMA

On Tue, May 12, 2009 at 11:23:20AM +0200, Arnd Bergmann wrote:
> Currently, the only architectures that don't set HAS_DMA are h8300, m32r
> m68k (except SUN3 and Coldfire), microblaze and s390.
> s390 will never get it, microblaze is currently implementing dma-mapping.h.
> 
> The other three are still using drivers/ide instead of drivers/ata.
> 
> One way to fix this would be to implement dma-mapping.h in h8300, m32r and
> m68k and leave !HAS_DMA as the obscure s390 case (this one already can't
> use ATA because of !HAS_MMIO).

If I'm reading the m68k code correctly, SUN3 is the one that doesn't have
DMA. It is implemented on any m68k with a standard Motorola MMU. It might
be possible to get the DMA code working on a sun3, but I doubt they ever
have IDE hardware.

	Brad Boyer
	flar@...andria.com

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