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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-01-08 13:35:09 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2010-03-07 18:01:11 +0100 |
| commit | cefc53c7f494240d4813c80154c7617452d1904d (patch) | |
| tree | 675370ec20df0841e404ed7b191d2d41f30f7e52 /include/linux/iommu.h | |
| parent | 4abc14a733f9002c05623db755aaafdd27fa7a91 (diff) | |
| download | lwn-cefc53c7f494240d4813c80154c7617452d1904d.tar.gz lwn-cefc53c7f494240d4813c80154c7617452d1904d.zip | |
iommu-api: Add iommu_map and iommu_unmap functions
These two functions provide support for mapping and
unmapping physical addresses to io virtual addresses. The
difference to the iommu_(un)map_range() is that the new
functions take a gfp_order parameter instead of a size. This
allows the IOMMU backend implementations to detect easier if
a given range can be mapped by larger page sizes.
These new functions should replace the old ones in the long
term.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 0f18f37a6503..6d0035bb1a0c 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -60,6 +60,10 @@ extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot); extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, size_t size); +extern int iommu_map(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, int gfp_order, int prot); +extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova, + int gfp_order); 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, @@ -108,6 +112,18 @@ static inline void iommu_unmap_range(struct iommu_domain *domain, { } +static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, int gfp_order, int prot) +{ + return -ENODEV; +} + +static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, + int gfp_order) +{ + return -ENODEV; +} + static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova) { |