From: Jeff Garzik <jgarzik@pobox.com>
To: Gary Poppitz <poppitzg@iomega.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: Issues with SIS 964 chipset on SATA
Date: Mon, 07 Feb 2005 16:44:33 -0500 [thread overview]
Message-ID: <4207E141.3090808@pobox.com> (raw)
In-Reply-To: <E0854782-793A-11D9-A80A-000A95D2AC6A@iomega.com>
Gary Poppitz wrote:
> We tracked down a problem with the 964 chipset with a 0x180 ID code that
> may save someone on the list some time.
>
> The chip will only transfer multiples of 4 bytes. Anything else will
> cause it to hang.
Interesting, either ULi or SiS set me a needs-to-be-cleaned-up-a-lot fix
for this.
SATA transport is dword-based, so this is not surprising.
For the SIS (or ULi, I forget) controller, and perhaps others, a
workaround needs to be applied. Suggestions/patches welcome.
We may want to guarantee _DMA_ of 4-byte-aligned chunks, but still only
reflect the true amount in ATAPI CDB.
Jeff
next prev parent reply other threads:[~2005-02-07 21:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-07 19:02 Issues with SIS 964 chipset on SATA Gary Poppitz
2005-02-07 21:44 ` Jeff Garzik [this message]
2005-02-17 8:26 ` Jeff Garzik
2005-02-17 8:38 ` Jens Axboe
2005-02-17 13:26 ` Mark Lord
2005-02-17 18:36 ` Jeff Garzik
2005-02-17 18:38 ` Jeff Garzik
2005-02-17 8:37 ` ATAPI issues (was Re: Issues with SIS 964 chipset on SATA) Jeff Garzik
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