diff options
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index a2c5b30e1763..b53a9557884a 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -15,13 +15,28 @@ #include <linux/poll.h> #include <uapi/linux/vfio.h> +/* + * VFIO devices can be placed in a set, this allows all devices to share this + * structure and the VFIO core will provide a lock that is held around + * open_device()/close_device() for all devices in the set. + */ +struct vfio_device_set { + void *set_id; + struct mutex lock; + struct list_head device_list; + unsigned int device_count; +}; + struct vfio_device { struct device *dev; const struct vfio_device_ops *ops; struct vfio_group *group; + struct vfio_device_set *dev_set; + struct list_head dev_set_list; /* Members below here are private, not for driver use */ refcount_t refcount; + unsigned int open_count; struct completion comp; struct list_head group_next; }; @@ -29,8 +44,8 @@ struct vfio_device { /** * struct vfio_device_ops - VFIO bus driver device callbacks * - * @open: Called when userspace creates new file descriptor for device - * @release: Called when userspace releases file descriptor for device + * @open_device: Called when the first file descriptor is opened for this device + * @close_device: Opposite of open_device * @read: Perform read(2) on device file descriptor * @write: Perform write(2) on device file descriptor * @ioctl: Perform ioctl(2) on device file descriptor, supporting VFIO_DEVICE_* @@ -43,8 +58,8 @@ struct vfio_device { */ struct vfio_device_ops { char *name; - int (*open)(struct vfio_device *vdev); - void (*release)(struct vfio_device *vdev); + int (*open_device)(struct vfio_device *vdev); + void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, size_t count, loff_t *ppos); ssize_t (*write)(struct vfio_device *vdev, const char __user *buf, @@ -61,11 +76,14 @@ extern void vfio_iommu_group_put(struct iommu_group *group, struct device *dev); void vfio_init_group_dev(struct vfio_device *device, struct device *dev, const struct vfio_device_ops *ops); +void vfio_uninit_group_dev(struct vfio_device *device); int vfio_register_group_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); extern struct vfio_device *vfio_device_get_from_dev(struct device *dev); extern void vfio_device_put(struct vfio_device *device); +int vfio_assign_device_set(struct vfio_device *device, void *set_id); + /* events for the backend driver notify callback */ enum vfio_iommu_notify_type { VFIO_IOMMU_CONTAINER_CLOSE = 0, |