Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760728Ab3GaRp4 (ORCPT ); Wed, 31 Jul 2013 13:45:56 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:45605 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760512Ab3GaRpv (ORCPT ); Wed, 31 Jul 2013 13:45:51 -0400 X-IronPort-AV: E=Sophos;i="4.89,788,1367971200"; d="scan'208";a="38588260" From: Stefano Stabellini To: CC: , , , , , Stefano Stabellini , , Subject: [PATCH RFC 1/8] arm: make SWIOTLB available Date: Wed, 31 Jul 2013 18:45:25 +0100 Message-ID: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: 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 Content-Length: 1954 Lines: 69 Signed-off-by: Stefano Stabellini CC: will.deacon@arm.com CC: linux@arm.linux.org.uk --- arch/arm/Kconfig | 7 +++++++ arch/arm/include/asm/dma-mapping.h | 24 ++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 0 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ba412e0..05125ab 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1832,6 +1832,13 @@ config CC_STACKPROTECTOR neutralized via a kernel panic. This feature requires gcc version 4.2 or above. +config SWIOTLB + def_bool y + select NEED_SG_DMA_LENGTH + +config IOMMU_HELPER + def_bool SWIOTLB + config XEN_DOM0 def_bool y depends on XEN diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 5b579b9..ad89e0f 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -86,6 +86,30 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) } #endif +static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + unsigned int offset = paddr & ~PAGE_MASK; + return pfn_to_dma(dev, paddr >> PAGE_SHIFT) + offset; +} + +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) +{ + unsigned int offset = dev_addr & ~PAGE_MASK; + return (dma_to_pfn(dev, dev_addr) << PAGE_SHIFT) + offset; +} + +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return 0; + + return addr + size - 1 <= *dev->dma_mask; +} + +static inline void dma_mark_clean(void *addr, size_t size) +{ +} + /* * DMA errors are defined by all-bits-set in the DMA address. */ -- 1.7.2.5 -- 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/