From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hiroshi Doyu Subject: [RFC 5/5] ARM: dma-mapping: Introduce dma_map_linear_attrs() for IOVA linear map Date: Wed, 29 Aug 2012 09:55:35 +0300 Message-ID: <1346223335-31455-6-git-send-email-hdoyu@nvidia.com> References: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1346223335-31455-1-git-send-email-hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org Cc: linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org, minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, chunsang.jeong-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, subashrp-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linaro-mm-sig-cunTk1MwBs8s++Sfvej+rw@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, vdumpa-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, pullip.cho-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: iommu@lists.linux-foundation.org Introduce a helper function, dma_map_linear(_attrs)() to create IOVA linear map, where IOVA and kernel virtual addresses are mapped at the same address linearly. This is useful to support legacy device drivers which expects no IOMMU. Signed-off-by: Hiroshi Doyu --- arch/arm/include/asm/dma-mapping.h | 13 +++++++++++++ include/asm-generic/dma-mapping-common.h | 1 + 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index f04a533..7a78dd4 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -212,6 +212,19 @@ static inline size_t dma_iova_get_free_max(struct device *dev) return ops->iova_get_free_max(dev); } +static inline dma_addr_t dma_map_linear_attrs(struct device *dev, void *va, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + dma_addr_t da; + + da = dma_iova_alloc_at(dev, (dma_addr_t)va, size); + if (da == DMA_ERROR_CODE) + return DMA_ERROR_CODE; + + return dma_map_single_at_attrs(dev, va, da, size, dir, attrs); +} + /** * arm_dma_mmap - map a coherent DMA allocation into user space * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index eada2d8..4564bf0 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -191,6 +191,7 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) #define dma_map_single_at(d, a, h, s, r) \ dma_map_single_at_attrs(d, a, h, s, r, NULL) +#define dma_map_linear(d, a, s, r) dma_map_linear_attrs(d, a, s, r, NULL) #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) -- 1.7.5.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: hdoyu@nvidia.com (Hiroshi Doyu) Date: Wed, 29 Aug 2012 09:55:35 +0300 Subject: [RFC 5/5] ARM: dma-mapping: Introduce dma_map_linear_attrs() for IOVA linear map In-Reply-To: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> References: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> Message-ID: <1346223335-31455-6-git-send-email-hdoyu@nvidia.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Introduce a helper function, dma_map_linear(_attrs)() to create IOVA linear map, where IOVA and kernel virtual addresses are mapped at the same address linearly. This is useful to support legacy device drivers which expects no IOMMU. Signed-off-by: Hiroshi Doyu --- arch/arm/include/asm/dma-mapping.h | 13 +++++++++++++ include/asm-generic/dma-mapping-common.h | 1 + 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index f04a533..7a78dd4 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -212,6 +212,19 @@ static inline size_t dma_iova_get_free_max(struct device *dev) return ops->iova_get_free_max(dev); } +static inline dma_addr_t dma_map_linear_attrs(struct device *dev, void *va, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + dma_addr_t da; + + da = dma_iova_alloc_at(dev, (dma_addr_t)va, size); + if (da == DMA_ERROR_CODE) + return DMA_ERROR_CODE; + + return dma_map_single_at_attrs(dev, va, da, size, dir, attrs); +} + /** * arm_dma_mmap - map a coherent DMA allocation into user space * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index eada2d8..4564bf0 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -191,6 +191,7 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) #define dma_map_single_at(d, a, h, s, r) \ dma_map_single_at_attrs(d, a, h, s, r, NULL) +#define dma_map_linear(d, a, s, r) dma_map_linear_attrs(d, a, s, r, NULL) #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) -- 1.7.5.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx184.postini.com [74.125.245.184]) by kanga.kvack.org (Postfix) with SMTP id EC39E6B006E for ; Wed, 29 Aug 2012 02:56:20 -0400 (EDT) From: Hiroshi Doyu Subject: [RFC 5/5] ARM: dma-mapping: Introduce dma_map_linear_attrs() for IOVA linear map Date: Wed, 29 Aug 2012 09:55:35 +0300 Message-ID: <1346223335-31455-6-git-send-email-hdoyu@nvidia.com> In-Reply-To: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> References: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: m.szyprowski@samsung.com Cc: iommu@lists.linux-foundation.org, Hiroshi Doyu , linux-arm-kernel@lists.infradead.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kyungmin.park@samsung.com, arnd@arndb.de, linux@arm.linux.org.uk, chunsang.jeong@linaro.org, vdumpa@nvidia.com, subashrp@gmail.com, minchan@kernel.org, pullip.cho@samsung.com, konrad.wilk@oracle.com, linux-tegra@vger.kernel.org Introduce a helper function, dma_map_linear(_attrs)() to create IOVA linear map, where IOVA and kernel virtual addresses are mapped at the same address linearly. This is useful to support legacy device drivers which expects no IOMMU. Signed-off-by: Hiroshi Doyu --- arch/arm/include/asm/dma-mapping.h | 13 +++++++++++++ include/asm-generic/dma-mapping-common.h | 1 + 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index f04a533..7a78dd4 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -212,6 +212,19 @@ static inline size_t dma_iova_get_free_max(struct device *dev) return ops->iova_get_free_max(dev); } +static inline dma_addr_t dma_map_linear_attrs(struct device *dev, void *va, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + dma_addr_t da; + + da = dma_iova_alloc_at(dev, (dma_addr_t)va, size); + if (da == DMA_ERROR_CODE) + return DMA_ERROR_CODE; + + return dma_map_single_at_attrs(dev, va, da, size, dir, attrs); +} + /** * arm_dma_mmap - map a coherent DMA allocation into user space * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index eada2d8..4564bf0 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -191,6 +191,7 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) #define dma_map_single_at(d, a, h, s, r) \ dma_map_single_at_attrs(d, a, h, s, r, NULL) +#define dma_map_linear(d, a, s, r) dma_map_linear_attrs(d, a, s, r, NULL) #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) -- 1.7.5.4 -- 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/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752570Ab2H2G40 (ORCPT ); Wed, 29 Aug 2012 02:56:26 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:5060 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751928Ab2H2G4W (ORCPT ); Wed, 29 Aug 2012 02:56:22 -0400 X-PGP-Universal: processed; by hqnvupgp06.nvidia.com on Tue, 28 Aug 2012 23:56:17 -0700 From: Hiroshi Doyu To: CC: , Hiroshi Doyu , , , , , , , , , , , , , , Subject: [RFC 5/5] ARM: dma-mapping: Introduce dma_map_linear_attrs() for IOVA linear map Date: Wed, 29 Aug 2012 09:55:35 +0300 Message-ID: <1346223335-31455-6-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> References: <1346223335-31455-1-git-send-email-hdoyu@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce a helper function, dma_map_linear(_attrs)() to create IOVA linear map, where IOVA and kernel virtual addresses are mapped at the same address linearly. This is useful to support legacy device drivers which expects no IOMMU. Signed-off-by: Hiroshi Doyu --- arch/arm/include/asm/dma-mapping.h | 13 +++++++++++++ include/asm-generic/dma-mapping-common.h | 1 + 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index f04a533..7a78dd4 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -212,6 +212,19 @@ static inline size_t dma_iova_get_free_max(struct device *dev) return ops->iova_get_free_max(dev); } +static inline dma_addr_t dma_map_linear_attrs(struct device *dev, void *va, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + dma_addr_t da; + + da = dma_iova_alloc_at(dev, (dma_addr_t)va, size); + if (da == DMA_ERROR_CODE) + return DMA_ERROR_CODE; + + return dma_map_single_at_attrs(dev, va, da, size, dir, attrs); +} + /** * arm_dma_mmap - map a coherent DMA allocation into user space * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index eada2d8..4564bf0 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -191,6 +191,7 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) #define dma_map_single_at(d, a, h, s, r) \ dma_map_single_at_attrs(d, a, h, s, r, NULL) +#define dma_map_linear(d, a, s, r) dma_map_linear_attrs(d, a, s, r, NULL) #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) -- 1.7.5.4