From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268111AbUIHVZ1 (ORCPT ); Wed, 8 Sep 2004 17:25:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268791AbUIHVZ0 (ORCPT ); Wed, 8 Sep 2004 17:25:26 -0400 Received: from a26.t1.student.liu.se ([130.236.221.26]:29388 "EHLO mail.drzeus.cx") by vger.kernel.org with ESMTP id S268111AbUIHVZZ (ORCPT ); Wed, 8 Sep 2004 17:25:25 -0400 Message-ID: <413F7960.8070500@drzeus.cx> Date: Wed, 08 Sep 2004 23:28:00 +0200 From: Pierre Ossman User-Agent: Mozilla Thunderbird 0.7.1 (X11/20040704) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: ISA DMA X-Enigmail-Version: 0.84.2.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm trying to figure out how to do ISA DMA transfers. I can't figure out how to satisfy all the requirements the ISA DMA controller sets. I've set a DMA mask of 0x00ffffff but mappings end up above the 16MB limit nonetheless. And I have no idea how to keep transfers within the same 64k boundary. I've been trying to figure out how other drivers do it but I can't see what I'm missing. And the documentation doesn't cover ISA DMA. I'm basically stuck now so I'd appreciate any tips you can give me. Rgds Pierre Ossman