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Re: DMA under embedded boards

from [Ralf Baechle] [Permanent Link][Original]
To: Rabeeh Khoury <rabeeh@galileo.co.il>
Subject: Re: DMA under embedded boards
From: Ralf Baechle <ralf@uni-koblenz.de>
Date: Tue, 15 Aug 2000 17:24:27 -0700
Cc: "linux-mips@fnet.fr" <linux-mips@fnet.fr>
In-reply-to: <39982DB5.2E150657@galileo.co.il>; from rabeeh@galileo.co.il on Mon, Aug 14, 2000 at 01:34:46PM -0400
References: <39982DB5.2E150657@galileo.co.il> 
On Mon, Aug 14, 2000 at 01:34:46PM -0400, Rabeeh Khoury wrote:

> I'm running Linux over one of our embedded systems (MIPS cpu), I would
> like to ask how to register the DMA capabilities of our system
> controller that the Linux can use them ?
> 
> Is there any function such as register_netdev, but for DMA's ?
> (register_dma etc...)

No.  The assumption - which only is wrong for IBM PC style DMA but that
one is only used by a few legacy things like the floppy driver on PCs -
is that each card has it's own DMA engine and therefore there won't be
any problems with sharing it.

  Ralf
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