From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [PATCH 2/8] ARM: dma-mapping: implement dma_map_single on top of dma_map_page Date: Mon, 20 Jun 2011 15:39:11 +0100 Message-ID: <20110620143911.GD26089@n2100.arm.linux.org.uk> References: <1308556213-24970-1-git-send-email-m.szyprowski@samsung.com> <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> Sender: owner-linux-mm@kvack.org To: Marek Szyprowski Cc: linux-arm-kernel@lists.infradead.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, Kyungmin Park , Arnd Bergmann , Joerg Roedel List-Id: linux-arch.vger.kernel.org On Mon, Jun 20, 2011 at 09:50:07AM +0200, Marek Szyprowski wrote: > This patch consolidates dma_map_single and dma_map_page calls. This is > required to let dma-mapping framework on ARM architecture use common, > generic dma-mapping helpers. This breaks DMA API debugging, which requires that dma_map_page and dma_unmap_page are paired separately from dma_map_single and dma_unmap_single(). This also breaks dmabounce when used with a highmem-enabled system - dmabounce refuses the dma_map_page() API but allows the dma_map_single() API. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from caramon.arm.linux.org.uk ([78.32.30.218]:59920 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755009Ab1FTOjd (ORCPT ); Mon, 20 Jun 2011 10:39:33 -0400 Date: Mon, 20 Jun 2011 15:39:11 +0100 From: Russell King - ARM Linux Subject: Re: [PATCH 2/8] ARM: dma-mapping: implement dma_map_single on top of dma_map_page Message-ID: <20110620143911.GD26089@n2100.arm.linux.org.uk> References: <1308556213-24970-1-git-send-email-m.szyprowski@samsung.com> <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Marek Szyprowski Cc: linux-arm-kernel@lists.infradead.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, Kyungmin Park , Arnd Bergmann , Joerg Roedel Message-ID: <20110620143911.FKR_9OpI_R8DXmYrji71_7AIAsMJSlrtx69_3oAQmqI@z> On Mon, Jun 20, 2011 at 09:50:07AM +0200, Marek Szyprowski wrote: > This patch consolidates dma_map_single and dma_map_page calls. This is > required to let dma-mapping framework on ARM architecture use common, > generic dma-mapping helpers. This breaks DMA API debugging, which requires that dma_map_page and dma_unmap_page are paired separately from dma_map_single and dma_unmap_single(). This also breaks dmabounce when used with a highmem-enabled system - dmabounce refuses the dma_map_page() API but allows the dma_map_single() API. From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Mon, 20 Jun 2011 15:39:11 +0100 Subject: [PATCH 2/8] ARM: dma-mapping: implement dma_map_single on top of dma_map_page In-Reply-To: <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> References: <1308556213-24970-1-git-send-email-m.szyprowski@samsung.com> <1308556213-24970-3-git-send-email-m.szyprowski@samsung.com> Message-ID: <20110620143911.GD26089@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Jun 20, 2011 at 09:50:07AM +0200, Marek Szyprowski wrote: > This patch consolidates dma_map_single and dma_map_page calls. This is > required to let dma-mapping framework on ARM architecture use common, > generic dma-mapping helpers. This breaks DMA API debugging, which requires that dma_map_page and dma_unmap_page are paired separately from dma_map_single and dma_unmap_single(). This also breaks dmabounce when used with a highmem-enabled system - dmabounce refuses the dma_map_page() API but allows the dma_map_single() API.