[PATCH v3 03/14] iommufd/fault: Move iommufd_fault_iopf_handler() to header

[Nicolin Chen <nicolinc@nvidia.com>]

The new vIRQ object will need a similar function for drivers to report the
vIOMMU related interrupts. Split the common part out to a smaller helper,
and place it in the header so that CONFIG_IOMMUFD_DRIVER_CORE can include
that in the driver.c file for drivers to use.

Then keep iommufd_fault_iopf_handler() in the header too, since it's quite
simple after all.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
 drivers/iommu/iommufd/iommufd_private.h | 20 +++++++++++++++++++-
 drivers/iommu/iommufd/fault.c           | 17 -----------------
 2 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h
index b6d706cf2c66..8b378705ee71 100644
--- a/drivers/iommu/iommufd/iommufd_private.h
+++ b/drivers/iommu/iommufd/iommufd_private.h
@@ -451,6 +451,17 @@ struct iommufd_fault {
 	struct wait_queue_head wait_queue;
 };
 
+static inline int iommufd_fault_notify(struct iommufd_fault *fault,
+				       struct list_head *new_fault)
+{
+	mutex_lock(&fault->mutex);
+	list_add_tail(new_fault, &fault->deliver);
+	mutex_unlock(&fault->mutex);
+
+	wake_up_interruptible(&fault->wait_queue);
+	return 0;
+}
+
 struct iommufd_attach_handle {
 	struct iommu_attach_handle handle;
 	struct iommufd_device *idev;
@@ -469,7 +480,14 @@ iommufd_get_fault(struct iommufd_ucmd *ucmd, u32 id)
 
 int iommufd_fault_alloc(struct iommufd_ucmd *ucmd);
 void iommufd_fault_destroy(struct iommufd_object *obj);
-int iommufd_fault_iopf_handler(struct iopf_group *group);
+
+static inline int iommufd_fault_iopf_handler(struct iopf_group *group)
+{
+	struct iommufd_hw_pagetable *hwpt =
+		group->attach_handle->domain->fault_data;
+
+	return iommufd_fault_notify(hwpt->fault, &group->node);
+}
 
 int iommufd_fault_domain_attach_dev(struct iommufd_hw_pagetable *hwpt,
 				    struct iommufd_device *idev);
diff --git a/drivers/iommu/iommufd/fault.c b/drivers/iommu/iommufd/fault.c
index 1d1095fc8224..d188994e4e84 100644
--- a/drivers/iommu/iommufd/fault.c
+++ b/drivers/iommu/iommufd/fault.c
@@ -433,20 +433,3 @@ int iommufd_fault_alloc(struct iommufd_ucmd *ucmd)
 
 	return rc;
 }
-
-int iommufd_fault_iopf_handler(struct iopf_group *group)
-{
-	struct iommufd_hw_pagetable *hwpt;
-	struct iommufd_fault *fault;
-
-	hwpt = group->attach_handle->domain->fault_data;
-	fault = hwpt->fault;
-
-	mutex_lock(&fault->mutex);
-	list_add_tail(&group->node, &fault->deliver);
-	mutex_unlock(&fault->mutex);
-
-	wake_up_interruptible(&fault->wait_queue);
-
-	return 0;
-}
-- 
2.43.0