From: Jeff Garzik <jeff@garzik.org>
To: Alexander Sabourenkov <screwdriver@lxnt.info>
Cc: linux-ide@vger.kernel.org, Tejun Heo <htejun@gmail.com>,
MisterE <MisterE2002@zonnet.nl>,
benh@kernel.crashing.org, jgarzik@pobox.com
Subject: Re: [PATCH-RFC] Promise TX4 implement hw-bug workaround
Date: Sun, 28 Oct 2007 06:29:32 -0400 [thread overview]
Message-ID: <4724648C.9080409@garzik.org> (raw)
In-Reply-To: <47235646.6050202@lxnt.info>
BTW, looking at the Promise code I see
> cam_con.h:
> /* for ASIC bug, limit the last element of SG byteCount must < 32 Dword */
> #define SG_COUNT_ASIC_BUG 32
> //#define SG_COUNT_ASIC_BUG 128
and in the code itself
> /* check PRD table, last element <= (32 Dword), fix ASIC bug */
(though the code obviously uses SG_COUNT_ASIC_BUG==32, as the first
paste indicates)
so it seems like Promise first used 128 (32 dwords), but then backed
down to 32 (8 dwords).
Either way, we definitely have an ASIC bug to work around, it seems...
Jeff
next prev parent reply other threads:[~2007-10-28 10:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-03 7:26 Re[2]: Sata Sil3512 bug? Mikael Pettersson
2007-10-03 8:31 ` Alexander Sabourenkov
2007-10-03 14:45 ` Re[2]: " MisterE
2007-10-03 14:50 ` Alan Cox
2007-10-14 12:07 ` Re[2]: " MisterE
2007-10-15 8:44 ` Alexander Sabourenkov
2007-10-17 12:39 ` Re[2]: Sata Sil3512 bug?; Promise SATA300 TX4 MisterE
2007-10-17 12:54 ` Alexander Sabourenkov
2007-10-17 15:04 ` Re[2]: " MisterE
2007-10-17 19:21 ` Peter Favrholdt
2007-10-19 12:02 ` Re[2]: " MisterE
2007-10-18 21:07 ` Alexander Sabourenkov
2007-10-19 1:26 ` Tejun Heo
2007-10-19 21:06 ` Alexander Sabourenkov
2007-10-19 22:58 ` Re[2]: " MisterE
2007-10-19 23:58 ` Tejun Heo
2007-10-20 21:50 ` Alexander Sabourenkov
2007-10-27 13:24 ` [PATCH-RFC] (was: Re: Sata Sil3512 bug?; Promise SATA300 TX4) Alexander Sabourenkov
2007-10-27 13:44 ` [PATCH-RFC] Alexander Sabourenkov
2007-10-27 14:08 ` Re[2]: [PATCH-RFC] MisterE
2007-10-27 15:09 ` [PATCH-RFC] Alexander Sabourenkov
2007-10-27 15:16 ` [PATCH-RFC] Promise TX4 implement hw-bug workaround Alexander Sabourenkov
2007-10-27 18:09 ` Alan Cox
2007-10-27 18:18 ` Alexander Sabourenkov
2007-10-27 18:37 ` Alexander Sabourenkov
2007-10-28 8:21 ` Jeff Garzik
2007-10-28 20:03 ` Alexander Sabourenkov
2007-10-28 10:29 ` Jeff Garzik [this message]
2007-10-28 11:52 ` Alexander Sabourenkov
2007-10-28 11:10 ` Jeff Garzik
-- strict thread matches above, loose matches on Subject: below --
2007-10-28 11:03 Mikael Pettersson
2007-10-28 16:32 Mikael Pettersson
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