From: Matthew Wilcox <matthew@wil.cx>
To: Grant Grundler <grundler@cup.hp.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Matthew Wilcox <matthew@wil.cx>,
parisc-linux@thepuffingroup.com
Subject: Re: [parisc-linux] ZONE_DMA
Date: Tue, 2 Jan 2001 01:21:22 +0000 [thread overview]
Message-ID: <20010102012122.A10153@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <200101020059.QAA26152@milano.cup.hp.com>; from grundler@cup.hp.com on Mon, Jan 01, 2001 at 04:59:31PM -0800
On Mon, Jan 01, 2001 at 04:59:31PM -0800, Grant Grundler wrote:
> o Elroy HW supports 64-bit PCI addressing (Dual Address cycle).
But, if possible, we want to avoid doing DAC as it cuts down the bandwidth
(and increases latency by a clock). obviously, if it's a 64-bit device
and a 64-bit controller, there's no problem, but we should try to stick
to 32-bit bus addresses where possible.
--
Revolutions do not require corporate support.
next prev parent reply other threads:[~2001-01-02 1:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-01 17:43 [parisc-linux] ZONE_DMA Matthew Wilcox
2001-01-01 18:09 ` Alan Cox
2001-01-01 18:24 ` Matthew Wilcox
2001-01-01 18:32 ` Alan Cox
2001-01-01 18:55 ` Matthew Wilcox
2001-01-01 19:01 ` Alan Cox
2001-01-01 19:18 ` Matthew Wilcox
2001-01-02 0:59 ` Grant Grundler
2001-01-02 1:21 ` Matthew Wilcox [this message]
2001-01-02 6:46 ` Grant Grundler
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