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-rw-r--r--include/linux/iommu.h69
1 files changed, 44 insertions, 25 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 9208eca4b0d1..5e1afe169549 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -103,10 +103,11 @@ static inline bool iommu_is_dma_domain(struct iommu_domain *domain)
}
enum iommu_cap {
- IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
- transactions */
+ IOMMU_CAP_CACHE_COHERENCY, /* IOMMU_CACHE is supported */
IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
+ IOMMU_CAP_PRE_BOOT_PROTECTION, /* Firmware says it used the IOMMU for
+ DMA protection and we should too */
};
/* These are the possible reserved region types */
@@ -272,6 +273,9 @@ struct iommu_ops {
* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
* queue
* @iova_to_phys: translate iova to physical address
+ * @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE,
+ * including no-snoop TLPs on PCIe or other platform
+ * specific mechanisms.
* @enable_nesting: Enable nesting
* @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
* @free: Release the domain after use.
@@ -300,6 +304,7 @@ struct iommu_domain_ops {
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
dma_addr_t iova);
+ bool (*enforce_cache_coherency)(struct iommu_domain *domain);
int (*enable_nesting)(struct iommu_domain *domain);
int (*set_pgtable_quirks)(struct iommu_domain *domain,
unsigned long quirks);
@@ -407,16 +412,10 @@ static inline const struct iommu_ops *dev_iommu_ops(struct device *dev)
return dev->iommu->iommu_dev->ops;
}
-#define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
-#define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
-#define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
-#define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
-#define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
-#define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
-
extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
extern int bus_iommu_probe(struct bus_type *bus);
extern bool iommu_present(struct bus_type *bus);
+extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);
extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
extern struct iommu_group *iommu_group_get_by_id(int id);
@@ -478,10 +477,6 @@ extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
extern struct iommu_group *iommu_group_get(struct device *dev);
extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
extern void iommu_group_put(struct iommu_group *group);
-extern int iommu_group_register_notifier(struct iommu_group *group,
- struct notifier_block *nb);
-extern int iommu_group_unregister_notifier(struct iommu_group *group,
- struct notifier_block *nb);
extern int iommu_register_device_fault_handler(struct device *dev,
iommu_dev_fault_handler_t handler,
void *data);
@@ -675,6 +670,13 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev,
void iommu_sva_unbind_device(struct iommu_sva *handle);
u32 iommu_sva_get_pasid(struct iommu_sva *handle);
+int iommu_device_use_default_domain(struct device *dev);
+void iommu_device_unuse_default_domain(struct device *dev);
+
+int iommu_group_claim_dma_owner(struct iommu_group *group, void *owner);
+void iommu_group_release_dma_owner(struct iommu_group *group);
+bool iommu_group_dma_owner_claimed(struct iommu_group *group);
+
#else /* CONFIG_IOMMU_API */
struct iommu_ops {};
@@ -689,6 +691,11 @@ static inline bool iommu_present(struct bus_type *bus)
return false;
}
+static inline bool device_iommu_capable(struct device *dev, enum iommu_cap cap)
+{
+ return false;
+}
+
static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
{
return false;
@@ -871,18 +878,6 @@ static inline void iommu_group_put(struct iommu_group *group)
{
}
-static inline int iommu_group_register_notifier(struct iommu_group *group,
- struct notifier_block *nb)
-{
- return -ENODEV;
-}
-
-static inline int iommu_group_unregister_notifier(struct iommu_group *group,
- struct notifier_block *nb)
-{
- return 0;
-}
-
static inline
int iommu_register_device_fault_handler(struct device *dev,
iommu_dev_fault_handler_t handler,
@@ -1031,6 +1026,30 @@ static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
{
return NULL;
}
+
+static inline int iommu_device_use_default_domain(struct device *dev)
+{
+ return 0;
+}
+
+static inline void iommu_device_unuse_default_domain(struct device *dev)
+{
+}
+
+static inline int
+iommu_group_claim_dma_owner(struct iommu_group *group, void *owner)
+{
+ return -ENODEV;
+}
+
+static inline void iommu_group_release_dma_owner(struct iommu_group *group)
+{
+}
+
+static inline bool iommu_group_dma_owner_claimed(struct iommu_group *group)
+{
+ return false;
+}
#endif /* CONFIG_IOMMU_API */
/**