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dma-mapping: add a kconfig symbol for arch_teardown_dma_ops availability

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> # arm64
This commit is contained in:
Christoph Hellwig 2018-12-21 22:14:44 +01:00
parent 347cb6af87
commit dc2acded38
6 changed files with 12 additions and 13 deletions
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1
arch/arm/Kconfig
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@ -16,6 +16,7 @@ config ARM
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
select ARCH_HAS_STRICT_MODULE_RWX if MMU
select ARCH_HAS_TEARDOWN_DMA_OPS if MMU
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAVE_CUSTOM_GPIO_H
select ARCH_HAS_GCOV_PROFILE_ALL

5
arch/arm/include/asm/dma-mapping.h
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@ -96,11 +96,6 @@ static inline unsigned long dma_max_pfn(struct device *dev)
}
#define dma_max_pfn(dev) dma_max_pfn(dev)
#ifdef CONFIG_MMU
#define arch_teardown_dma_ops arch_teardown_dma_ops
extern void arch_teardown_dma_ops(struct device *dev);
#endif
/* do not use this function in a driver */
static inline bool is_device_dma_coherent(struct device *dev)
{

1
arch/arm64/Kconfig
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@ -29,6 +29,7 @@ config ARM64
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_TEARDOWN_DMA_OPS if IOMMU_SUPPORT
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_INLINE_READ_LOCK if !PREEMPT

5
arch/arm64/include/asm/dma-mapping.h
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@ -29,11 +29,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return NULL;
}
#ifdef CONFIG_IOMMU_DMA
void arch_teardown_dma_ops(struct device *dev);
#define arch_teardown_dma_ops arch_teardown_dma_ops
#endif
/*
* Do not use this function in a driver, it is only provided for
* arch/arm/mm/xen.c, which is used by arm64 as well.

10
include/linux/dma-mapping.h
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@ -681,9 +681,13 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
}
#endif /* CONFIG_ARCH_HAS_SETUP_DMA_OPS */
#ifndef arch_teardown_dma_ops
static inline void arch_teardown_dma_ops(struct device *dev) { }
#endif
#ifdef CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS
void arch_teardown_dma_ops(struct device *dev);
#else
static inline void arch_teardown_dma_ops(struct device *dev)
{
}
#endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */
static inline unsigned int dma_get_max_seg_size(struct device *dev)
{

3
kernel/dma/Kconfig
View File

@ -22,6 +22,9 @@ config HAVE_GENERIC_DMA_COHERENT
config ARCH_HAS_SETUP_DMA_OPS
bool
config ARCH_HAS_TEARDOWN_DMA_OPS
bool
config ARCH_HAS_SYNC_DMA_FOR_DEVICE
bool