diff options
Diffstat (limited to 'arch/arm/plat-s5p/include/plat/s5p-iovmm.h')
| -rw-r--r-- | arch/arm/plat-s5p/include/plat/s5p-iovmm.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/plat-s5p/include/plat/s5p-iovmm.h b/arch/arm/plat-s5p/include/plat/s5p-iovmm.h index 2e31ce3..f22edc7 100644 --- a/arch/arm/plat-s5p/include/plat/s5p-iovmm.h +++ b/arch/arm/plat-s5p/include/plat/s5p-iovmm.h @@ -11,6 +11,50 @@ #ifndef __ASM_PLAT_IOVMM_H #define __ASM_PLAT_IOVMM_H +#ifdef CONFIG_DRM_EXYNOS_IOMMU +#ifdef CONFIG_IOVMM +void *iovmm_setup(unsigned long s_iova, unsigned long size); +void iovmm_cleanup(void *in_vmm); +int iovmm_activate(void *in_vmm, struct device *dev); +void iovmm_deactivate(void *in_vmm, struct device *dev); + +/* iovmm_map() - Maps a list of physical memory chunks + * @dev: the owner of the IO address space where the mapping is created + * @sg: list of physical memory chunks to map + * @offset: length in bytes where the mapping starts + * @size: how much memory to map in bytes. @offset + @size must not exceed + * total size of @sg + * + * This function returns mapped IO address in the address space of @dev. + * Returns 0 if mapping fails. + * + * The caller of this function must ensure that iovmm_cleanup() is not called + * while this function is called. + * + */ +dma_addr_t iovmm_map(void *in_vmm, struct scatterlist *sg, off_t offset, + size_t size); + +/* iovmm_map() - unmaps the given IO address + * @dev: the owner of the IO address space where @iova belongs + * @iova: IO address that needs to be unmapped and freed. + * + * The caller of this function must ensure that iovmm_cleanup() is not called + * while this function is called. + */ +void iovmm_unmap(void *in_vmm, dma_addr_t iova); + +#else +#define iovmm_setup(s_iova, size) (ERR_PTR(-ENOSYS)) +#define iovmm_cleanup(in_vmm) +#define iovmm_activate(in_vmm, dev) (-ENOSYS) +#define iovmm_deactivate(in_vmm, dev) +#define iovmm_map(in_vmm, sg, offset, size) (0) +#define iovmm_unmap(in_vmm, iova) +#endif /* CONFIG_IOVMM */ + +#else + #ifdef CONFIG_IOVMM int iovmm_setup(struct device *dev); void iovmm_cleanup(struct device *dev); @@ -52,4 +96,6 @@ void iovmm_unmap(struct device *dev, dma_addr_t iova); #define iovmm_unmap(dev, iova) #endif /* CONFIG_IOVMM */ +#endif /* CONFIG_DRM_EXYNOS_IOMMU */ + #endif /*__ASM_PLAT_IOVMM_H*/ |