#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;
};
/**
* 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_*
*/
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,
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,