[PATCH v2 4/4] arm64: Hook up IOMMU dma_ops
From: robin.murphy@arm.com (Robin Murphy)
Date: 2015-06-11 15:54:24
Also in:
linux-iommu
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
With iommu_dma_ops in place, hook them up to the configuration code, so IOMMU-fronted devices will get them automatically. Signed-off-by: Robin Murphy <robin.murphy@arm.com> --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/dma-mapping.h | 11 ++++++----- arch/arm64/mm/dma-mapping.c | 15 +++++++++++++++ 3 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7796af4..257cd7e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -70,6 +70,7 @@ config ARM64 select HAVE_PERF_USER_STACK_DUMP select HAVE_RCU_TABLE_FREE select HAVE_SYSCALL_TRACEPOINTS + select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 835a8d1..a87b507 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h@@ -45,11 +45,8 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev) return __generic_dma_ops(dev); } -static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, - struct iommu_ops *iommu, bool coherent) -{ - dev->archdata.dma_coherent = coherent; -} +void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, + struct iommu_ops *iommu, bool coherent); #define arch_setup_dma_ops arch_setup_dma_ops /* do not use this function in a driver */
@@ -64,6 +61,10 @@ static inline bool is_device_dma_coherent(struct device *dev) #include <linux/dma-iommu.h> #ifdef CONFIG_IOMMU_DMA + +void arch_teardown_dma_ops(struct device *dev); +#define arch_teardown_dma_ops arch_teardown_dma_ops + static inline struct iommu_dma_domain *arch_get_dma_domain(struct device *dev) { return dev->archdata.dma_domain;
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 51b7ae5..c1e1a07 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c@@ -769,6 +769,14 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, mutex_unlock(&iommu_dma_notifier_lock); } +void arch_teardown_dma_ops(struct device *dev) +{ + if (dev->archdata.dma_domain) { + iommu_dma_detach_device(dev); + dev->archdata.dma_ops = NULL; + } +} + #else static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
@@ -776,3 +784,10 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, { } #endif /* CONFIG_IOMMU_DMA */ + +void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, + struct iommu_ops *iommu, bool coherent) +{ + dev->archdata.dma_coherent = coherent; + __iommu_setup_dma_ops(dev, dma_base, size, iommu); +}
--
1.9.1