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| author | Sheng Yang <sheng@linux.intel.com> | 2009-03-18 15:33:06 +0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-03-24 09:42:51 +0000 |
| commit | dbb9fd8630e95b6155aff658a2b5f80e95ca2bc6 (patch) | |
| tree | b24caff50e1c5bfb428cb7422608bfef95d916e8 /include/linux/iommu.h | |
| parent | 58c610bd1a3f50820e45a7c09ec0e44d2cda15dd (diff) | |
| download | linux-stable-dbb9fd8630e95b6155aff658a2b5f80e95ca2bc6.tar.gz linux-stable-dbb9fd8630e95b6155aff658a2b5f80e95ca2bc6.tar.bz2 linux-stable-dbb9fd8630e95b6155aff658a2b5f80e95ca2bc6.zip | |
iommu: Add domain_has_cap iommu_ops
This iommu_op can tell if domain have a specific capability, like snooping
control for Intel IOMMU, which can be used by other components of kernel to
adjust the behaviour.
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 8a7bfb1b6ca0..0cf3a4e43f23 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -28,6 +28,8 @@ struct iommu_domain { void *priv; }; +#define IOMMU_CAP_CACHE_COHERENCY 0x1 + struct iommu_ops { int (*domain_init)(struct iommu_domain *domain); void (*domain_destroy)(struct iommu_domain *domain); @@ -39,6 +41,8 @@ struct iommu_ops { size_t size); phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, unsigned long iova); + int (*domain_has_cap)(struct iommu_domain *domain, + unsigned long cap); }; #ifdef CONFIG_IOMMU_API @@ -57,6 +61,8 @@ extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, size_t size); extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova); +extern int iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap); #else /* CONFIG_IOMMU_API */ @@ -107,6 +113,12 @@ static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, return 0; } +static inline int domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return 0; +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ |