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 /drivers | |
| 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 'drivers')
| -rw-r--r-- | drivers/iommu/iommu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 8b9ded88e6f5..fe1ae51e0f14 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -192,6 +192,20 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) } EXPORT_SYMBOL_GPL(iommu_detach_device); +void iommu_domain_activate(struct iommu_domain *domain) +{ + if (likely(domain->ops->domain_activate != NULL)) + domain->ops->domain_activate(domain); +} +EXPORT_SYMBOL_GPL(iommu_domain_activate); + +void iommu_domain_idle(struct iommu_domain *domain) +{ + if (likely(domain->ops->domain_idle != NULL)) + domain->ops->domain_idle(domain); +} +EXPORT_SYMBOL_GPL(iommu_domain_idle); + phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova) { |