From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752800AbaFDIMO (ORCPT ); Wed, 4 Jun 2014 04:12:14 -0400 Received: from mail-gw1-out.broadcom.com ([216.31.210.62]:10150 "EHLO mail-gw1-out.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751323AbaFDILv (ORCPT ); Wed, 4 Jun 2014 04:11:51 -0400 X-IronPort-AV: E=Sophos;i="4.98,971,1392192000"; d="scan'208";a="33036723" From: To: , , , , CC: , , Subject: [PATCH 1/1] device.h: arm,dma-iommu: Move out dma_iommu_mapping struct Date: Wed, 4 Jun 2014 13:41:46 +0530 Message-ID: <1401869506-48129-2-git-send-email-ritesh.harjani@gmail.com> X-Mailer: git-send-email 1.8.1.3 In-Reply-To: <1401869506-48129-1-git-send-email-ritesh.harjani@gmail.com> References: <1401869506-48129-1-git-send-email-ritesh.harjani@gmail.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 From: Ritesh Harjani This patch moves out *mapping pointer of dma_iommu_mapping from arch/arm/include/asm/device.h to include/liunux/device.h Also, it moves out complete structre definition of dma_iommu_mapping to include/linux/iommu-helper.h This is done since arm iommu's dma-mapping arch independent code, needs to be moved out to lib/iommu-helper.c, this means dma_iommu_mapping will be arch independent and later other archs can make use of it. Signed-off-by: Ritesh Harjani --- arch/arm/Kconfig | 4 ++++ arch/arm/include/asm/device.h | 9 --------- arch/arm/include/asm/dma-iommu.h | 16 +--------------- arch/arm/mm/dma-mapping.c | 20 ++++++++++---------- drivers/gpu/drm/exynos/exynos_drm_iommu.c | 10 +++++----- include/linux/device.h | 4 ++++ include/linux/iommu-helper.h | 22 ++++++++++++++++++++++ 7 files changed, 46 insertions(+), 39 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c0b31fc..20717fb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -78,6 +78,7 @@ config ARM_DMA_USE_IOMMU bool select ARM_HAS_SG_CHAIN select NEED_SG_DMA_LENGTH + select DMA_USE_IOMMU_HELPER_MAPPING if ARM_DMA_USE_IOMMU @@ -1945,6 +1946,9 @@ config SWIOTLB config IOMMU_HELPER def_bool SWIOTLB +config DMA_USE_IOMMU_HELPER_MAPPING + def_bool n + config XEN_DOM0 def_bool y depends on XEN diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h index dc662fc..6e2cb0e 100644 --- a/arch/arm/include/asm/device.h +++ b/arch/arm/include/asm/device.h @@ -14,9 +14,6 @@ struct dev_archdata { #ifdef CONFIG_IOMMU_API void *iommu; /* private IOMMU data */ #endif -#ifdef CONFIG_ARM_DMA_USE_IOMMU - struct dma_iommu_mapping *mapping; -#endif }; struct omap_device; @@ -27,10 +24,4 @@ struct pdev_archdata { #endif }; -#ifdef CONFIG_ARM_DMA_USE_IOMMU -#define to_dma_iommu_mapping(dev) ((dev)->archdata.mapping) -#else -#define to_dma_iommu_mapping(dev) NULL -#endif - #endif diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h index 8e3fcb9..50c010b 100644 --- a/arch/arm/include/asm/dma-iommu.h +++ b/arch/arm/include/asm/dma-iommu.h @@ -8,21 +8,7 @@ #include #include #include - -struct dma_iommu_mapping { - /* iommu specific data */ - struct iommu_domain *domain; - - unsigned long **bitmaps; /* array of bitmaps */ - unsigned int nr_bitmaps; /* nr of elements in array */ - unsigned int extensions; - size_t bitmap_size; /* size of a single bitmap */ - size_t bits; /* per bitmap */ - dma_addr_t base; - - spinlock_t lock; - struct kref kref; -}; +#include struct dma_iommu_mapping * arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size); diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 3d43c41..b82561e 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1292,7 +1292,7 @@ err: static dma_addr_t __iommu_create_mapping(struct device *dev, struct page **pages, size_t size) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; dma_addr_t dma_addr, iova; int i, ret = DMA_ERROR_CODE; @@ -1328,7 +1328,7 @@ fail: static int __iommu_remove_mapping(struct device *dev, dma_addr_t iova, size_t size) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; /* * add optional in-page offset from iova to size and align @@ -1541,7 +1541,7 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg, enum dma_data_direction dir, struct dma_attrs *attrs, bool is_coherent) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova, iova_base; int ret = 0; unsigned int count; @@ -1762,7 +1762,7 @@ static dma_addr_t arm_coherent_iommu_map_page(struct device *dev, struct page *p unsigned long offset, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t dma_addr; int ret, prot, len = PAGE_ALIGN(size + offset); @@ -1815,7 +1815,7 @@ static void arm_coherent_iommu_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; int offset = handle & ~PAGE_MASK; int len = PAGE_ALIGN(size + offset); @@ -1840,7 +1840,7 @@ static void arm_iommu_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); int offset = handle & ~PAGE_MASK; @@ -1859,7 +1859,7 @@ static void arm_iommu_unmap_page(struct device *dev, dma_addr_t handle, static void arm_iommu_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); unsigned int offset = handle & ~PAGE_MASK; @@ -1873,7 +1873,7 @@ static void arm_iommu_sync_single_for_cpu(struct device *dev, static void arm_iommu_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); unsigned int offset = handle & ~PAGE_MASK; @@ -2045,7 +2045,7 @@ int arm_iommu_attach_device(struct device *dev, return err; kref_get(&mapping->kref); - dev->archdata.mapping = mapping; + dev->mapping = mapping; set_dma_ops(dev, &iommu_ops); pr_debug("Attached IOMMU controller to %s device.\n", dev_name(dev)); @@ -2072,7 +2072,7 @@ void arm_iommu_detach_device(struct device *dev) iommu_detach_device(mapping->domain, dev); kref_put(&mapping->kref, release_iommu_mapping); - dev->archdata.mapping = NULL; + dev->mapping = NULL; set_dma_ops(dev, NULL); pr_debug("Detached IOMMU controller from %s device.\n", dev_name(dev)); diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c b/drivers/gpu/drm/exynos/exynos_drm_iommu.c index 091068f..2dabdbf 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c +++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c @@ -46,7 +46,7 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev) dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), GFP_KERNEL); dma_set_max_seg_size(dev, 0xffffffffu); - dev->archdata.mapping = mapping; + dev->mapping = mapping; return 0; } @@ -63,7 +63,7 @@ void drm_release_iommu_mapping(struct drm_device *drm_dev) { struct device *dev = drm_dev->dev; - arm_iommu_release_mapping(dev->archdata.mapping); + arm_iommu_release_mapping(dev->mapping); } /* @@ -81,7 +81,7 @@ int drm_iommu_attach_device(struct drm_device *drm_dev, struct device *dev = drm_dev->dev; int ret; - if (!dev->archdata.mapping) { + if (!dev->mapping) { DRM_ERROR("iommu_mapping is null.\n"); return -EFAULT; } @@ -91,7 +91,7 @@ int drm_iommu_attach_device(struct drm_device *drm_dev, GFP_KERNEL); dma_set_max_seg_size(subdrv_dev, 0xffffffffu); - ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping); + ret = arm_iommu_attach_device(subdrv_dev, dev->mapping); if (ret < 0) { DRM_DEBUG_KMS("failed iommu attach.\n"); return ret; @@ -124,7 +124,7 @@ void drm_iommu_detach_device(struct drm_device *drm_dev, struct device *subdrv_dev) { struct device *dev = drm_dev->dev; - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; if (!mapping || !mapping->domain) return; diff --git a/include/linux/device.h b/include/linux/device.h index c0a1261..c73df6f 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -705,6 +705,10 @@ struct device { /* arch specific additions */ struct dev_archdata archdata; +#ifdef CONFIG_DMA_USE_IOMMU_HELPER_MAPPING + struct dma_iommu_mapping *mapping; +#endif + struct device_node *of_node; /* associated device tree node */ struct acpi_dev_node acpi_node; /* associated ACPI device node */ diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index 86bdeff..0c5e4c7 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -3,6 +3,28 @@ #include +#ifdef CONFIG_DMA_USE_IOMMU_HELPER_MAPPING +struct dma_iommu_mapping { + /* iommu specific data */ + struct iommu_domain *domain; + + unsigned long **bitmaps; /* array of bitmaps */ + unsigned int nr_bitmaps; /* nr of elements in array */ + unsigned int extensions; + size_t bitmap_size; /* size of a single bitmap */ + size_t bits; /* per bitmap */ + dma_addr_t base; + + spinlock_t lock; + struct kref kref; +}; + +#define to_dma_iommu_mapping(dev) ((dev)->mapping) +#else +#define to_dma_iommu_mapping(dev) NULL +#endif + + static inline unsigned long iommu_device_max_index(unsigned long size, unsigned long offset, u64 dma_mask) -- 1.8.1.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: ritesh.harjani@gmail.com (ritesh.harjani at gmail.com) Date: Wed, 4 Jun 2014 13:41:46 +0530 Subject: [PATCH 1/1] device.h: arm, dma-iommu: Move out dma_iommu_mapping struct In-Reply-To: <1401869506-48129-1-git-send-email-ritesh.harjani@gmail.com> References: <1401869506-48129-1-git-send-email-ritesh.harjani@gmail.com> Message-ID: <1401869506-48129-2-git-send-email-ritesh.harjani@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Ritesh Harjani This patch moves out *mapping pointer of dma_iommu_mapping from arch/arm/include/asm/device.h to include/liunux/device.h Also, it moves out complete structre definition of dma_iommu_mapping to include/linux/iommu-helper.h This is done since arm iommu's dma-mapping arch independent code, needs to be moved out to lib/iommu-helper.c, this means dma_iommu_mapping will be arch independent and later other archs can make use of it. Signed-off-by: Ritesh Harjani --- arch/arm/Kconfig | 4 ++++ arch/arm/include/asm/device.h | 9 --------- arch/arm/include/asm/dma-iommu.h | 16 +--------------- arch/arm/mm/dma-mapping.c | 20 ++++++++++---------- drivers/gpu/drm/exynos/exynos_drm_iommu.c | 10 +++++----- include/linux/device.h | 4 ++++ include/linux/iommu-helper.h | 22 ++++++++++++++++++++++ 7 files changed, 46 insertions(+), 39 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c0b31fc..20717fb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -78,6 +78,7 @@ config ARM_DMA_USE_IOMMU bool select ARM_HAS_SG_CHAIN select NEED_SG_DMA_LENGTH + select DMA_USE_IOMMU_HELPER_MAPPING if ARM_DMA_USE_IOMMU @@ -1945,6 +1946,9 @@ config SWIOTLB config IOMMU_HELPER def_bool SWIOTLB +config DMA_USE_IOMMU_HELPER_MAPPING + def_bool n + config XEN_DOM0 def_bool y depends on XEN diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h index dc662fc..6e2cb0e 100644 --- a/arch/arm/include/asm/device.h +++ b/arch/arm/include/asm/device.h @@ -14,9 +14,6 @@ struct dev_archdata { #ifdef CONFIG_IOMMU_API void *iommu; /* private IOMMU data */ #endif -#ifdef CONFIG_ARM_DMA_USE_IOMMU - struct dma_iommu_mapping *mapping; -#endif }; struct omap_device; @@ -27,10 +24,4 @@ struct pdev_archdata { #endif }; -#ifdef CONFIG_ARM_DMA_USE_IOMMU -#define to_dma_iommu_mapping(dev) ((dev)->archdata.mapping) -#else -#define to_dma_iommu_mapping(dev) NULL -#endif - #endif diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h index 8e3fcb9..50c010b 100644 --- a/arch/arm/include/asm/dma-iommu.h +++ b/arch/arm/include/asm/dma-iommu.h @@ -8,21 +8,7 @@ #include #include #include - -struct dma_iommu_mapping { - /* iommu specific data */ - struct iommu_domain *domain; - - unsigned long **bitmaps; /* array of bitmaps */ - unsigned int nr_bitmaps; /* nr of elements in array */ - unsigned int extensions; - size_t bitmap_size; /* size of a single bitmap */ - size_t bits; /* per bitmap */ - dma_addr_t base; - - spinlock_t lock; - struct kref kref; -}; +#include struct dma_iommu_mapping * arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size); diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 3d43c41..b82561e 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1292,7 +1292,7 @@ err: static dma_addr_t __iommu_create_mapping(struct device *dev, struct page **pages, size_t size) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; dma_addr_t dma_addr, iova; int i, ret = DMA_ERROR_CODE; @@ -1328,7 +1328,7 @@ fail: static int __iommu_remove_mapping(struct device *dev, dma_addr_t iova, size_t size) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; /* * add optional in-page offset from iova to size and align @@ -1541,7 +1541,7 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg, enum dma_data_direction dir, struct dma_attrs *attrs, bool is_coherent) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova, iova_base; int ret = 0; unsigned int count; @@ -1762,7 +1762,7 @@ static dma_addr_t arm_coherent_iommu_map_page(struct device *dev, struct page *p unsigned long offset, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t dma_addr; int ret, prot, len = PAGE_ALIGN(size + offset); @@ -1815,7 +1815,7 @@ static void arm_coherent_iommu_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; int offset = handle & ~PAGE_MASK; int len = PAGE_ALIGN(size + offset); @@ -1840,7 +1840,7 @@ static void arm_iommu_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); int offset = handle & ~PAGE_MASK; @@ -1859,7 +1859,7 @@ static void arm_iommu_unmap_page(struct device *dev, dma_addr_t handle, static void arm_iommu_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); unsigned int offset = handle & ~PAGE_MASK; @@ -1873,7 +1873,7 @@ static void arm_iommu_sync_single_for_cpu(struct device *dev, static void arm_iommu_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; dma_addr_t iova = handle & PAGE_MASK; struct page *page = phys_to_page(iommu_iova_to_phys(mapping->domain, iova)); unsigned int offset = handle & ~PAGE_MASK; @@ -2045,7 +2045,7 @@ int arm_iommu_attach_device(struct device *dev, return err; kref_get(&mapping->kref); - dev->archdata.mapping = mapping; + dev->mapping = mapping; set_dma_ops(dev, &iommu_ops); pr_debug("Attached IOMMU controller to %s device.\n", dev_name(dev)); @@ -2072,7 +2072,7 @@ void arm_iommu_detach_device(struct device *dev) iommu_detach_device(mapping->domain, dev); kref_put(&mapping->kref, release_iommu_mapping); - dev->archdata.mapping = NULL; + dev->mapping = NULL; set_dma_ops(dev, NULL); pr_debug("Detached IOMMU controller from %s device.\n", dev_name(dev)); diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c b/drivers/gpu/drm/exynos/exynos_drm_iommu.c index 091068f..2dabdbf 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c +++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c @@ -46,7 +46,7 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev) dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), GFP_KERNEL); dma_set_max_seg_size(dev, 0xffffffffu); - dev->archdata.mapping = mapping; + dev->mapping = mapping; return 0; } @@ -63,7 +63,7 @@ void drm_release_iommu_mapping(struct drm_device *drm_dev) { struct device *dev = drm_dev->dev; - arm_iommu_release_mapping(dev->archdata.mapping); + arm_iommu_release_mapping(dev->mapping); } /* @@ -81,7 +81,7 @@ int drm_iommu_attach_device(struct drm_device *drm_dev, struct device *dev = drm_dev->dev; int ret; - if (!dev->archdata.mapping) { + if (!dev->mapping) { DRM_ERROR("iommu_mapping is null.\n"); return -EFAULT; } @@ -91,7 +91,7 @@ int drm_iommu_attach_device(struct drm_device *drm_dev, GFP_KERNEL); dma_set_max_seg_size(subdrv_dev, 0xffffffffu); - ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping); + ret = arm_iommu_attach_device(subdrv_dev, dev->mapping); if (ret < 0) { DRM_DEBUG_KMS("failed iommu attach.\n"); return ret; @@ -124,7 +124,7 @@ void drm_iommu_detach_device(struct drm_device *drm_dev, struct device *subdrv_dev) { struct device *dev = drm_dev->dev; - struct dma_iommu_mapping *mapping = dev->archdata.mapping; + struct dma_iommu_mapping *mapping = dev->mapping; if (!mapping || !mapping->domain) return; diff --git a/include/linux/device.h b/include/linux/device.h index c0a1261..c73df6f 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -705,6 +705,10 @@ struct device { /* arch specific additions */ struct dev_archdata archdata; +#ifdef CONFIG_DMA_USE_IOMMU_HELPER_MAPPING + struct dma_iommu_mapping *mapping; +#endif + struct device_node *of_node; /* associated device tree node */ struct acpi_dev_node acpi_node; /* associated ACPI device node */ diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index 86bdeff..0c5e4c7 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -3,6 +3,28 @@ #include +#ifdef CONFIG_DMA_USE_IOMMU_HELPER_MAPPING +struct dma_iommu_mapping { + /* iommu specific data */ + struct iommu_domain *domain; + + unsigned long **bitmaps; /* array of bitmaps */ + unsigned int nr_bitmaps; /* nr of elements in array */ + unsigned int extensions; + size_t bitmap_size; /* size of a single bitmap */ + size_t bits; /* per bitmap */ + dma_addr_t base; + + spinlock_t lock; + struct kref kref; +}; + +#define to_dma_iommu_mapping(dev) ((dev)->mapping) +#else +#define to_dma_iommu_mapping(dev) NULL +#endif + + static inline unsigned long iommu_device_max_index(unsigned long size, unsigned long offset, u64 dma_mask) -- 1.8.1.3