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From: Jan Evert van Grootheest <j.e.van.grootheest@caiway.nl>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-ide@vger.kernel.org, bzolnier@gmail.com
Subject: Re: DMA on ht6560b?
Date: Mon, 18 Feb 2008 16:17:10 +0100	[thread overview]
Message-ID: <47B9A176.9020808@caiway.nl> (raw)
In-Reply-To: <20080218143003.39f22ca3@core>

Alan Cox wrote:
>> I think the ht6560b controller supports DMA. 
>>     
>
> The data sheet doesn't. It's a PIO controller capable of PIO4 with 32bit
> host to cpu transfers are best.
>   

Hmm. But what do you then think that 2.2 did?
I mean it now does 1.15M/s and in 2.2 it would do ~4M/s with DMA on. 
Were those perhaps ISA style DMA transfers (as opposed to BM-DMA)?
I really should compile a 2.2 with ht6560b support...

Thanks for answering, though, I don't know that much about ATA.
Jan Evert


  reply	other threads:[~2008-02-18 15:17 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-18 14:13 DMA on ht6560b? Jan Evert van Grootheest
2008-02-18 14:30 ` Alan Cox
2008-02-18 15:17   ` Jan Evert van Grootheest [this message]
2008-02-18 15:43     ` Alan Cox

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