diff mbox series

[v1,1/2] vfio: Export vfio device get and put registration helpers

Message ID 20240422063602.3690124-2-vivek.kasireddy@intel.com (mailing list archive)
State Superseded
Headers show
Series vfio/pci: Allow MMIO regions to be exported through dma-buf | expand

Commit Message

Kasireddy, Vivek April 22, 2024, 6:30 a.m. UTC 
These helpers are useful for managing additional references taken
on the device from other associated VFIO modules.

Original-patch-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
---
 drivers/vfio/vfio_main.c | 2 ++
 include/linux/vfio.h     | 2 ++
 2 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index e97d796a54fb..7434461fc1b3 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -165,11 +165,13 @@  void vfio_device_put_registration(struct vfio_device *device)
 	if (refcount_dec_and_test(&device->refcount))
 		complete(&device->comp);
 }
+EXPORT_SYMBOL_GPL(vfio_device_put_registration);
 
 bool vfio_device_try_get_registration(struct vfio_device *device)
 {
 	return refcount_inc_not_zero(&device->refcount);
 }
+EXPORT_SYMBOL_GPL(vfio_device_try_get_registration);
 
 /*
  * VFIO driver API
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 8b1a29820409..a6302fca8acd 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -278,6 +278,8 @@  static inline void vfio_put_device(struct vfio_device *device)
 int vfio_register_group_dev(struct vfio_device *device);
 int vfio_register_emulated_iommu_dev(struct vfio_device *device);
 void vfio_unregister_group_dev(struct vfio_device *device);
+bool vfio_device_try_get_registration(struct vfio_device *device);
+void vfio_device_put_registration(struct vfio_device *device);
 
 int vfio_assign_device_set(struct vfio_device *device, void *set_id);
 unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set);