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authorJoerg Roedel <joerg.roedel@amd.com>2010-01-08 13:35:09 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2010-03-07 18:01:11 +0100
commitcefc53c7f494240d4813c80154c7617452d1904d (patch)
tree675370ec20df0841e404ed7b191d2d41f30f7e52 /include/linux/iommu.h
parent4abc14a733f9002c05623db755aaafdd27fa7a91 (diff)
downloadop-kernel-dev-cefc53c7f494240d4813c80154c7617452d1904d.zip
op-kernel-dev-cefc53c7f494240d4813c80154c7617452d1904d.tar.gz
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.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 0f18f37..6d0035b 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)
{
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