Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264998AbUFWPog (ORCPT ); Wed, 23 Jun 2004 11:44:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265124AbUFWPog (ORCPT ); Wed, 23 Jun 2004 11:44:36 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:23827 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S264998AbUFWPoe (ORCPT ); Wed, 23 Jun 2004 11:44:34 -0400 Date: Wed, 23 Jun 2004 16:44:19 +0100 From: Russell King To: Takashi Iwai Cc: Linus Torvalds , Jeff Garzik , Matt Porter , Jamey Hicks , Ian Molton , linux-kernel@vger.kernel.org, greg@kroah.com, tony@atomide.com, david-b@pacbell.net, joshua@joshuawise.com Subject: Re: DMA API issues Message-ID: <20040623164419.E27549@flint.arm.linux.org.uk> Mail-Followup-To: Takashi Iwai , Linus Torvalds , Jeff Garzik , Matt Porter , Jamey Hicks , Ian Molton , linux-kernel@vger.kernel.org, greg@kroah.com, tony@atomide.com, david-b@pacbell.net, joshua@joshuawise.com References: <20040618122112.D3851@home.com> <20040618204322.C17516@flint.arm.linux.org.uk> <20040622000838.B7802@flint.arm.linux.org.uk> <40D7941F.3020909@pobox.com> <20040623133423.B27549@flint.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: ; from tiwai@suse.de on Wed, Jun 23, 2004 at 05:36:57PM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1176 Lines: 28 On Wed, Jun 23, 2004 at 05:36:57PM +0200, Takashi Iwai wrote: > > and a similar one for the ARM-specific "write combining" case (for > > framebuffers utilising the DMA API)? > > pgprot_noncached() is used on many other architectures in fbmem.c > (well, not really, but the result is identical). > Should it be provided as another one, or is it used as default in > dma_mmap_coherent()? The whole point is to kill the idea that drivers should have to know about page protection crap. That should be wholely contained within the architecture implementation. > Also, it would be nice to have a version for sg-buffer, too. Well, we don't have a sg-buffer version of dma_alloc_coherent(), so we don't have a sg-buffer version of dma_mmap_coherent(). -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/ 2.6 Serial core - 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/