From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753642Ab3HAAeA (ORCPT ); Wed, 31 Jul 2013 20:34:00 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:43416 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752922Ab3HAAd6 convert rfc822-to-8bit (ORCPT ); Wed, 31 Jul 2013 20:33:58 -0400 User-Agent: K-9 Mail for Android In-Reply-To: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> References: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset=UTF-8 Subject: Re: [PATCH RFC 1/8] arm: make SWIOTLB available From: Konrad Rzeszutek Wilk Date: Wed, 31 Jul 2013 20:32:54 -0400 To: Stefano Stabellini , xen-devel@lists.xensource.com CC: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Stefano.Stabellini@eu.citrix.com, Ian.Campbell@citrix.com, will.deacon@arm.com, linux@arm.linux.org.uk Message-ID: <334c4fe7-e40c-489c-84db-9bb58c705d44@email.android.com> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Stefano Stabellini wrote: >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 >+ Could you explain the purpose of these two a bit more please? > 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. > */ From mboxrd@z Thu Jan 1 00:00:00 1970 From: konrad.wilk@oracle.com (Konrad Rzeszutek Wilk) Date: Wed, 31 Jul 2013 20:32:54 -0400 Subject: [PATCH RFC 1/8] arm: make SWIOTLB available In-Reply-To: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> References: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> Message-ID: <334c4fe7-e40c-489c-84db-9bb58c705d44@email.android.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Stefano Stabellini wrote: >Signed-off-by: Stefano Stabellini >CC: will.deacon at arm.com >CC: linux at 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 >+ Could you explain the purpose of these two a bit more please? > 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. > */ From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH RFC 1/8] arm: make SWIOTLB available Date: Wed, 31 Jul 2013 20:32:54 -0400 Message-ID: <334c4fe7-e40c-489c-84db-9bb58c705d44@email.android.com> References: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1375292732-7627-1-git-send-email-stefano.stabellini@eu.citrix.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Stefano Stabellini , xen-devel@lists.xensource.com Cc: linux@arm.linux.org.uk, Ian.Campbell@citrix.com, Stefano.Stabellini@eu.citrix.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: xen-devel@lists.xenproject.org Stefano Stabellini wrote: >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 >+ Could you explain the purpose of these two a bit more please? > 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. > */