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dma-mapping: fix build when !CONFIG_ARM_DMA_USE_IOMMU

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Allow compilation when CONFIG_ARM_DMA_USE_IOMMU is not
selected by providing necessary stub functions and fix few
mismatch in function declarations.

Following this, remove the changes introduced by
f3d8d1061fb0b146b3f5 ("msm: ipa: add empty implementation
for iommu functions") as they are no longer needed.

Change-Id: I04e3aa63407064e8d9c9550a5cb0a82ede899f00
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>
This commit is contained in:
Shiraz Hashim 2015-11-18 12:46:05 +05:30 • committed by David Keitel
parent 3a25b40a4e
commit d880efb021
3 changed files with 29 additions and 3 deletions
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26
arch/arm/include/asm/dma-iommu.h
View file

@ -24,6 +24,8 @@ struct dma_iommu_mapping {
struct kref kref;
};
#ifdef CONFIG_ARM_DMA_USE_IOMMU
struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
@ -33,5 +35,29 @@ int arm_iommu_attach_device(struct device *dev,
struct dma_iommu_mapping *mapping);
void arm_iommu_detach_device(struct device *dev);
#else /* !CONFIG_ARM_DMA_USE_IOMMU */
static inline struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size)
{
return NULL;
}
static inline void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping)
{
}
static inline int arm_iommu_attach_device(struct device *dev,
struct dma_iommu_mapping *mapping)
{
return -ENODEV;
}
static inline void arm_iommu_detach_device(struct device *dev)
{
}
#endif /* CONFIG_ARM_DMA_USE_IOMMU */
#endif /* __KERNEL__ */
#endif

4
arch/arm64/include/asm/dma-iommu.h
View file

@ -3,6 +3,7 @@
#ifdef __KERNEL__
#include <linux/err.h>
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
@ -35,8 +36,7 @@ void arm_iommu_detach_device(struct device *dev);
#else /* !CONFIG_ARM64_DMA_USE_IOMMU */
static inline struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
int order)
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size)
{
return ERR_PTR(-ENOMEM);
}

2
include/linux/msm_dma_iommu_mapping.h
View file

@ -62,7 +62,7 @@ void msm_dma_buf_freed(void *buffer);
static inline int msm_dma_map_sg_attrs(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir, struct dma_buf *dma_buf,
int flags)
struct dma_attrs *attr)
{
return -EINVAL;
}