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From: Jeff Garzik <jgarzik@pobox.com>
To: Gary Poppitz <poppitzg@iomega.com>
Cc: linux-ide@vger.kernel.org, Jens Axboe <axboe@suse.de>
Subject: Re: Issues with SIS 964 chipset on SATA
Date: Thu, 17 Feb 2005 03:26:04 -0500	[thread overview]
Message-ID: <4214551C.8030109@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.


After further research, this is popping up on a number of chips (and 
worked around in several vendor drivers).

It looks like I will need to do a workaround for all SATA ATAPI devices: 
  if the transfer is not a multiple of 4 bytes, pad it with an DMA 1-3 
byte DMA segment.

	Jeff



  parent reply	other threads:[~2005-02-17  8:26 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
2005-02-17  8:26 ` Jeff Garzik [this message]
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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