From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>,
Paul Fulghum <paulkf@microgate.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH] TTY flip buffer SMP changes
Date: Sun, 10 Oct 2004 01:32:15 +0100 [thread overview]
Message-ID: <1097368333.6128.2.camel@localhost.localdomain> (raw)
In-Reply-To: <1097286154.5592.9.camel@gaston>
On Sad, 2004-10-09 at 02:42, Benjamin Herrenschmidt wrote:
> That reminds me... a while ago, I toyed with the idea of having DMA
> support in pmac_zilog. The case where it would work well is typically
> for things that have a known sized frame. If that information was
> provided down to the driver, I could setup the DMA descriptor for
> that frame size & have it interrupt me when the frame is complete,
> along with a timeout set to the estimated time for receiving such
> a frame + X% (I was thinking +20%)
I thought the 85C30 only supported DMA for sync modes ? We have sync
8530 DMA code for ISA bus already, which I never got around to adding
async too 8)
next prev parent reply other threads:[~2004-10-10 1:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-07 19:58 [RFC][PATCH] TTY flip buffer SMP changes Paul Fulghum
2004-10-07 19:37 ` Alan Cox
2004-10-08 6:26 ` Theodore Ts'o
2004-10-08 13:35 ` Paul Fulghum
2004-10-08 12:51 ` Alan Cox
2004-10-08 15:00 ` Theodore Ts'o
2004-10-09 1:42 ` Benjamin Herrenschmidt
2004-10-10 0:32 ` Alan Cox [this message]
2004-10-10 3:26 ` Benjamin Herrenschmidt
2004-10-10 12:49 ` Maciej W. Rozycki
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