Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 8 Mar 2001 14:30:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 8 Mar 2001 14:30:48 -0500 Received: from gnu.in-berlin.de ([192.109.42.4]:53771 "EHLO gnu.in-berlin.de") by vger.kernel.org with ESMTP id ; Thu, 8 Mar 2001 14:30:36 -0500 X-Envelope-From: news@goldbach.in-berlin.de To: linux-kernel@vger.kernel.org Path: kraxel From: Gerd Knorr Newsgroups: lists.linux.kernel Subject: Re: Process memory DMA access from devices, kiobuf ? Date: 8 Mar 2001 18:53:28 GMT Organization: Strusel 007 Lines: 21 Message-ID: In-Reply-To: <3AA74F31.554A7A42@beam.demon.co.uk> NNTP-Posting-Host: bogomips.masq.in-berlin.de X-Trace: goldbach.masq.in-berlin.de 984077608 7789 192.168.69.77 (8 Mar 2001 18:53:28 GMT) X-Complaints-To: news@goldbach.in-berlin.de NNTP-Posting-Date: 8 Mar 2001 18:53:28 GMT User-Agent: slrn/0.9.6.3 (Linux) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Terry Barnaby wrote: > Hi, > > We are doing work with FPGA's and have a Linux driver for a particular > board that has these > devices. For performance reasons the driver has the ability to DMA > directly to process (user) > memory. We have made use of the kiobuf routines such as > "map_user_kiobuf()" to map into > physical memory the user address space. > I note that the RedHat kernels have a patched kernel containing the > kiobuf code but the > standard linux source does not right up to 2.4.2. Huh? map_user_kiobuf() _is_ present in 2.4.2. See include/linux/iobuf.h Gerd -- Get back there in front of the computer NOW. Christmas can wait. -- Linus "the Grinch" Torvalds, 24 Dec 2000 on linux-kernel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/