linux-kernel - Re: [PATCH] Add IDE mode support for SB600 SATA

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Message-ID: <20061123111307.3b249ce9@localhost.localdomain>
Date:	Thu, 23 Nov 2006 11:13:07 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Andrew Morton <akpm@...l.org>
Cc:	"Conke Hu" <conke.hu@....com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Add IDE mode support for SB600 SATA

On Wed, 22 Nov 2006 18:26:10 -0800
Andrew Morton <akpm@...l.org> wrote:

> I doubt if it's appropriate to do all this via ifdefs.  Users don't compile
> their kernels - others compile them for the users.  We need the one kernel
> binary to support both modes.   Possible?

I'm not sure we do. What the Jmicron drivers do is

- If SATA (libata) is enabled (module or built in) then turn on AHCI
- If it is not enabled then support the chip fully in SFF mode via
drivers/ide

As the AHCI mode is fundamentally better (both with respect to standards
and to performance) this makes sense.

I think the SB600 should do the same - if support is in the
kernel/modules - then turn on AHCI mode. If not then don't. No user
options needed, no complex config questions.

Alan
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