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-rw-r--r--include/linux/iommu.h66
1 files changed, 26 insertions, 40 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 58ea0935d355..d87f9cbfc01e 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -127,7 +127,7 @@ struct iopf_group {
/* list node for iommu_fault_param::faults */
struct list_head pending_node;
struct work_struct work;
- struct iommu_domain *domain;
+ struct iommu_attach_handle *attach_handle;
/* The device's fault data parameter. */
struct iommu_fault_param *fault_param;
};
@@ -317,6 +317,9 @@ enum iommu_dev_features {
#define IOMMU_PASID_INVALID (-1U)
typedef unsigned int ioasid_t;
+/* Read but do not clear any dirty bits */
+#define IOMMU_DIRTY_NO_CLEAR (1 << 0)
+
#ifdef CONFIG_IOMMU_API
/**
@@ -353,9 +356,6 @@ struct iommu_dirty_bitmap {
struct iommu_iotlb_gather *gather;
};
-/* Read but do not clear any dirty bits */
-#define IOMMU_DIRTY_NO_CLEAR (1 << 0)
-
/**
* struct iommu_dirty_ops - domain specific dirty tracking operations
* @set_dirty_tracking: Enable or Disable dirty tracking on the iommu domain
@@ -547,6 +547,10 @@ static inline int __iommu_copy_struct_from_user_array(
* @default_domain: If not NULL this will always be set as the default domain.
* This should be an IDENTITY/BLOCKED/PLATFORM domain.
* Do not use in new drivers.
+ * @user_pasid_table: IOMMU driver supports user-managed PASID table. There is
+ * no user domain for each PASID and the I/O page faults are
+ * forwarded through the user domain attached to the device
+ * RID.
*/
struct iommu_ops {
bool (*capable)(struct device *dev, enum iommu_cap);
@@ -590,6 +594,7 @@ struct iommu_ops {
struct iommu_domain *blocked_domain;
struct iommu_domain *release_domain;
struct iommu_domain *default_domain;
+ u8 user_pasid_table:1;
};
/**
@@ -969,7 +974,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev);
/**
* struct iommu_fwspec - per-device IOMMU instance data
- * @ops: ops for this device's IOMMU
* @iommu_fwnode: firmware handle for this device's IOMMU
* @flags: IOMMU_FWSPEC_* flags
* @num_ids: number of associated device IDs
@@ -980,7 +984,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev);
* consumers.
*/
struct iommu_fwspec {
- const struct iommu_ops *ops;
struct fwnode_handle *iommu_fwnode;
u32 flags;
unsigned int num_ids;
@@ -990,27 +993,33 @@ struct iommu_fwspec {
/* ATS is supported */
#define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
+/*
+ * An iommu attach handle represents a relationship between an iommu domain
+ * and a PASID or RID of a device. It is allocated and managed by the component
+ * that manages the domain and is stored in the iommu group during the time the
+ * domain is attached.
+ */
+struct iommu_attach_handle {
+ struct iommu_domain *domain;
+};
+
/**
* struct iommu_sva - handle to a device-mm bond
*/
struct iommu_sva {
+ struct iommu_attach_handle handle;
struct device *dev;
- struct iommu_domain *domain;
- struct list_head handle_item;
refcount_t users;
};
struct iommu_mm_data {
u32 pasid;
struct list_head sva_domains;
- struct list_head sva_handles;
};
-int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
- const struct iommu_ops *ops);
+int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode);
void iommu_fwspec_free(struct device *dev);
int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids);
-const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
{
@@ -1053,12 +1062,10 @@ int iommu_device_claim_dma_owner(struct device *dev, void *owner);
void iommu_device_release_dma_owner(struct device *dev);
int iommu_attach_device_pasid(struct iommu_domain *domain,
- struct device *dev, ioasid_t pasid);
+ struct device *dev, ioasid_t pasid,
+ struct iommu_attach_handle *handle);
void iommu_detach_device_pasid(struct iommu_domain *domain,
struct device *dev, ioasid_t pasid);
-struct iommu_domain *
-iommu_get_domain_for_dev_pasid(struct device *dev, ioasid_t pasid,
- unsigned int type);
ioasid_t iommu_alloc_global_pasid(struct device *dev);
void iommu_free_global_pasid(ioasid_t pasid);
#else /* CONFIG_IOMMU_API */
@@ -1321,8 +1328,7 @@ static inline void iommu_device_unlink(struct device *dev, struct device *link)
}
static inline int iommu_fwspec_init(struct device *dev,
- struct fwnode_handle *iommu_fwnode,
- const struct iommu_ops *ops)
+ struct fwnode_handle *iommu_fwnode)
{
return -ENODEV;
}
@@ -1337,12 +1343,6 @@ static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
return -ENODEV;
}
-static inline
-const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode)
-{
- return NULL;
-}
-
static inline int
iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
{
@@ -1394,7 +1394,8 @@ static inline int iommu_device_claim_dma_owner(struct device *dev, void *owner)
}
static inline int iommu_attach_device_pasid(struct iommu_domain *domain,
- struct device *dev, ioasid_t pasid)
+ struct device *dev, ioasid_t pasid,
+ struct iommu_attach_handle *handle)
{
return -ENODEV;
}
@@ -1404,13 +1405,6 @@ static inline void iommu_detach_device_pasid(struct iommu_domain *domain,
{
}
-static inline struct iommu_domain *
-iommu_get_domain_for_dev_pasid(struct device *dev, ioasid_t pasid,
- unsigned int type)
-{
- return NULL;
-}
-
static inline ioasid_t iommu_alloc_global_pasid(struct device *dev)
{
return IOMMU_PASID_INVALID;
@@ -1533,8 +1527,6 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev,
struct mm_struct *mm);
void iommu_sva_unbind_device(struct iommu_sva *handle);
u32 iommu_sva_get_pasid(struct iommu_sva *handle);
-struct iommu_domain *iommu_sva_domain_alloc(struct device *dev,
- struct mm_struct *mm);
#else
static inline struct iommu_sva *
iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
@@ -1559,12 +1551,6 @@ static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm)
}
static inline void mm_pasid_drop(struct mm_struct *mm) {}
-
-static inline struct iommu_domain *
-iommu_sva_domain_alloc(struct device *dev, struct mm_struct *mm)
-{
- return NULL;
-}
#endif /* CONFIG_IOMMU_SVA */
#ifdef CONFIG_IOMMU_IOPF
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