From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 4 Sep 2001 10:45:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 4 Sep 2001 10:45:09 -0400 Received: from mailer.zib.de ([130.73.108.11]:18327 "EHLO mailer.zib.de") by vger.kernel.org with ESMTP id ; Tue, 4 Sep 2001 10:44:53 -0400 Date: Tue, 4 Sep 2001 16:45:09 +0200 From: Sebastian Heidl To: linux-kernel@vger.kernel.org Subject: DMA to/from user buffers Message-ID: <20010904164509.A27144@csr-pc1.zib.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i X-www.distributed.net: 28 OGR packets (4.82 Tnodes) [3.98 Mnodes/s] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, two questions about using an user-supplied buffer (e.g. malloced in user space) for DMA transfers: 1. Is it possible ? 2. What restrictions/requirements apply for the buffer (alignment...) ? Documentation/DMA-mapping.txt only talks about buffers allocated in kernel space. thanks, _sh_ --