diff options
| author | Paul Hunt <hunt@ti.com> | 2012-07-21 13:32:54 -0500 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2012-09-07 13:06:40 +0800 |
| commit | 94247b12b95c5a7155b1f53a8adcc5cfb92a54c9 (patch) | |
| tree | d5ee13227c150b5d803b140a83a83d2f60f77b94 /include | |
| parent | 492843045f090db8057361e29b5241dce8361889 (diff) | |
iommu: add iommu_domain_activate and iommu_domain_idle functions
The MMUs associated with processors can reside in different power
domains, and may need the context to be saved when the associated
power domain is being put into OFF state.
Two new functions, iommu_domain_activate and iommu_domain_idle have
been added to the iommu domain, and call into the individual drivers
through a corresponding iommu_ops function. These functions allow the
individual driver implementations to perform the necessary operations
to preserve and restore the context of the iommu devices.
Signed-off-by: Paul Hunt <hunt@ti.com>
Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Subramaniam Chanderashekarapuram <subramaniam.ca@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iommu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index eb72d3b890e9..0f3f36f4420c 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -55,6 +55,8 @@ struct iommu_domain { * @domain_destroy: destroy iommu domain * @attach_dev: attach device to an iommu domain * @detach_dev: detach device from an iommu domain + * @domain_activate: enable iommu pm domain and restore configuration registers + * @domain_idle: save iommu configuration registers and idle pm domain * @map: map a physically contiguous memory region to an iommu domain * @unmap: unmap a physically contiguous memory region from an iommu domain * @iova_to_phys: translate iova to physical address @@ -67,6 +69,8 @@ struct iommu_ops { void (*domain_destroy)(struct iommu_domain *domain); int (*attach_dev)(struct iommu_domain *domain, struct device *dev); void (*detach_dev)(struct iommu_domain *domain, struct device *dev); + void (*domain_activate)(struct iommu_domain *domain); + void (*domain_idle)(struct iommu_domain *domain); int (*map)(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot); size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, @@ -87,6 +91,8 @@ extern int iommu_attach_device(struct iommu_domain *domain, struct device *dev); extern void iommu_detach_device(struct iommu_domain *domain, struct device *dev); +extern void iommu_domain_activate(struct iommu_domain *domain); +extern void iommu_domain_idle(struct iommu_domain *domain); extern int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot); extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, |