iommu/core: Use bus->iommu_ops in the iommu-api

Use the per-bus iommu-ops in the functions of the iommu-api
instead of the global iommu_ops.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ad8ce1addb4dd4c37c9893f3c3cf9511dbd752e7..1575aaa36c94d9c16b6d8d77c2e59e96e50324cf 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -110,34 +110,48 @@ EXPORT_SYMBOL_GPL(iommu_domain_alloc);
 
 void iommu_domain_free(struct iommu_domain *domain)
 {
-       iommu_ops->domain_destroy(domain);
+       if (likely(domain->ops->domain_destroy != NULL))
+               domain->ops->domain_destroy(domain);
+
        kfree(domain);
 }
 EXPORT_SYMBOL_GPL(iommu_domain_free);
 
 int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
 {
-       return iommu_ops->attach_dev(domain, dev);
+       if (unlikely(domain->ops->attach_dev == NULL))
+               return -ENODEV;
+
+       return domain->ops->attach_dev(domain, dev);
 }
 EXPORT_SYMBOL_GPL(iommu_attach_device);
 
 void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
 {
-       iommu_ops->detach_dev(domain, dev);
+       if (unlikely(domain->ops->detach_dev == NULL))
+               return;
+
+       domain->ops->detach_dev(domain, dev);
 }
 EXPORT_SYMBOL_GPL(iommu_detach_device);
 
 phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
                               unsigned long iova)
 {
-       return iommu_ops->iova_to_phys(domain, iova);
+       if (unlikely(domain->ops->iova_to_phys == NULL))
+               return 0;
+
+       return domain->ops->iova_to_phys(domain, iova);
 }
 EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
 
 int iommu_domain_has_cap(struct iommu_domain *domain,
                         unsigned long cap)
 {
-       return iommu_ops->domain_has_cap(domain, cap);
+       if (unlikely(domain->ops->domain_has_cap == NULL))
+               return 0;
+
+       return domain->ops->domain_has_cap(domain, cap);
 }
 EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
 
@@ -146,11 +160,14 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
 {
        size_t size;
 
+       if (unlikely(domain->ops->map == NULL))
+               return -ENODEV;
+
        size         = PAGE_SIZE << gfp_order;
 
        BUG_ON(!IS_ALIGNED(iova | paddr, size));
 
-       return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
+       return domain->ops->map(domain, iova, paddr, gfp_order, prot);
 }
 EXPORT_SYMBOL_GPL(iommu_map);
 
@@ -158,10 +175,13 @@ int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
 {
        size_t size;
 
+       if (unlikely(domain->ops->unmap == NULL))
+               return -ENODEV;
+
        size         = PAGE_SIZE << gfp_order;
 
        BUG_ON(!IS_ALIGNED(iova, size));
 
-       return iommu_ops->unmap(domain, iova, gfp_order);
+       return domain->ops->unmap(domain, iova, gfp_order);
 }
 EXPORT_SYMBOL_GPL(iommu_unmap);