diff options
| author |   Christoph Hellwig <hch@lst.de> | 2022-09-23 11:26:42 +0200 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2022-10-04 12:06:58 -0600 |
| commit | 89345d5177aa0f6d678251e1e0870b0eeb1ab510 (patch) | |
| tree | 8e29a3f83f05c8aa5a64b6b66c522c18d763c2b4 /include | |
| parent | vfio/mdev: make mdev.h standalone includable (diff) | |
| download | linux-dev-89345d5177aa0f6d678251e1e0870b0eeb1ab510.tar.xz linux-dev-89345d5177aa0f6d678251e1e0870b0eeb1ab510.zip | |
vfio/mdev: embedd struct mdev_parent in the parent data structure
Simplify mdev_{un}register_device by requiring the caller to pass in
a structure allocate as part of the parent device structure. This
removes the need for a list of parents and the separate mdev_parent
refcount as we can simplify rely on the reference to the parent device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Link: https://lore.kernel.org/r/20220923092652.100656-5-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mdev.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/linux/mdev.h b/include/linux/mdev.h index a5d8ae6132a2..262512c2a8ff 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -23,6 +23,16 @@ struct mdev_device { bool active; }; +/* embedded into the struct device that the mdev devices hang off */ +struct mdev_parent { + struct device *dev; + struct mdev_driver *mdev_driver; + struct kset *mdev_types_kset; + struct list_head type_list; + /* Synchronize device creation/removal with parent unregistration */ + struct rw_semaphore unreg_sem; +}; + static inline struct mdev_device *to_mdev_device(struct device *dev) { return container_of(dev, struct mdev_device, dev); @@ -70,8 +80,9 @@ struct mdev_driver { extern struct bus_type mdev_bus_type; -int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver); -void mdev_unregister_device(struct device *dev); +int mdev_register_parent(struct mdev_parent *parent, struct device *dev, + struct mdev_driver *mdev_driver); +void mdev_unregister_parent(struct mdev_parent *parent); int mdev_register_driver(struct mdev_driver *drv); void mdev_unregister_driver(struct mdev_driver *drv); |