From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
To: Dave Olien <dmo@osdl.org>
Cc: "T. Weyergraf" <kirk@colinet.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: DAC960, 2.4.19 alpha problems
Date: Wed, 20 Nov 2002 16:36:19 +0300 [thread overview]
Message-ID: <20021120163619.A21996@jurassic.park.msu.ru> (raw)
In-Reply-To: <20021119113731.A8238@acpi.pdx.osdl.net>; from dmo@osdl.org on Tue, Nov 19, 2002 at 11:37:31AM -0800
On Tue, Nov 19, 2002 at 11:37:31AM -0800, Dave Olien wrote:
> On ia32, we know that the memory allocated for memory mailboxes
> (using __get_free_pages()) will always be below 4-gig.
That was it, I guess.
virt_to_bus() is deprecated - driver *must* be converted
to the DMA mapping interface (see Documentation/DMA-mapping.txt).
virt_to_bus() on alpha works only for limited range of kernel addresses.
On dp264 valid range is 0x00000000-0x7fefffff (i.e. 2Gb - 1Mb).
Given the fact that __get_free_pages() returns highest possible
pages I'm not surprised that this driver doesn't work on a 2Gb machine.
Probably "mem=2047M" boot argument would help...
Ivan.
prev parent reply other threads:[~2002-11-20 13:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-19 11:06 T. Weyergraf
2002-11-19 12:58 ` Alan Cox
2002-11-19 12:23 ` T. Weyergraf
2002-11-19 19:37 ` Dave Olien
2002-11-20 13:36 ` Ivan Kokshaysky [this message]
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