From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King Subject: Re: [PATCH] asm-generic: add dma-mapping-linear.h Date: Mon, 1 Jun 2009 09:29:43 +0100 Message-ID: <20090601082943.GA5550@flint.arm.linux.org.uk> References: <200905282104.55818.arnd@arndb.de> <20090601130319A.fujita.tomonori@lab.ntt.co.jp> <20090601075114.GA29107@flint.arm.linux.org.uk> <20090601170847V.fujita.tomonori@lab.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20090601170847V.fujita.tomonori@lab.ntt.co.jp> Sender: linux-kernel-owner@vger.kernel.org To: FUJITA Tomonori Cc: arnd@arndb.de, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org List-Id: linux-arch.vger.kernel.org On Mon, Jun 01, 2009 at 05:08:09PM +0900, FUJITA Tomonori wrote: > This adds a version of the dma-mapping API to asm-generic that can be > used by most architectures that only need a linear mapping. It depends what is meant by "linear mapping". If that's just a way of saying "all that needs to be done for the DMA streaming APIs is to flush the cache" then the vast majority of ARMs fall into that category. The DMA bounce code is a broken design concept that really needs to be put to death. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from caramon.arm.linux.org.uk ([78.32.30.218]:32793 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752850AbZFAI3z (ORCPT ); Mon, 1 Jun 2009 04:29:55 -0400 Date: Mon, 1 Jun 2009 09:29:43 +0100 From: Russell King Subject: Re: [PATCH] asm-generic: add dma-mapping-linear.h Message-ID: <20090601082943.GA5550@flint.arm.linux.org.uk> References: <200905282104.55818.arnd@arndb.de> <20090601130319A.fujita.tomonori@lab.ntt.co.jp> <20090601075114.GA29107@flint.arm.linux.org.uk> <20090601170847V.fujita.tomonori@lab.ntt.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090601170847V.fujita.tomonori@lab.ntt.co.jp> Sender: linux-arch-owner@vger.kernel.org List-ID: To: FUJITA Tomonori Cc: arnd@arndb.de, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Message-ID: <20090601082943.x5RbTvEjrcIfxIzqIfDvCYmFSoXdXStcoD-myO7GRnE@z> On Mon, Jun 01, 2009 at 05:08:09PM +0900, FUJITA Tomonori wrote: > This adds a version of the dma-mapping API to asm-generic that can be > used by most architectures that only need a linear mapping. It depends what is meant by "linear mapping". If that's just a way of saying "all that needs to be done for the DMA streaming APIs is to flush the cache" then the vast majority of ARMs fall into that category. The DMA bounce code is a broken design concept that really needs to be put to death. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: