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Diffstat (limited to 'drivers/vfio/vfio.h')
-rw-r--r--drivers/vfio/vfio.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h
index 503bea6c843d..bcad54bbab08 100644
--- a/drivers/vfio/vfio.h
+++ b/drivers/vfio/vfio.h
@@ -3,6 +3,16 @@
* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
* Author: Alex Williamson <alex.williamson@redhat.com>
*/
+#ifndef __VFIO_VFIO_H__
+#define __VFIO_VFIO_H__
+
+#include <linux/device.h>
+#include <linux/cdev.h>
+#include <linux/module.h>
+
+struct iommu_group;
+struct vfio_device;
+struct vfio_container;
enum vfio_group_type {
/*
@@ -28,6 +38,30 @@ enum vfio_group_type {
VFIO_NO_IOMMU,
};
+struct vfio_group {
+ struct device dev;
+ struct cdev cdev;
+ /*
+ * When drivers is non-zero a driver is attached to the struct device
+ * that provided the iommu_group and thus the iommu_group is a valid
+ * pointer. When drivers is 0 the driver is being detached. Once users
+ * reaches 0 then the iommu_group is invalid.
+ */
+ refcount_t drivers;
+ unsigned int container_users;
+ struct iommu_group *iommu_group;
+ struct vfio_container *container;
+ struct list_head device_list;
+ struct mutex device_lock;
+ struct list_head vfio_next;
+ struct list_head container_next;
+ enum vfio_group_type type;
+ struct mutex group_lock;
+ struct kvm *kvm;
+ struct file *opened_file;
+ struct blocking_notifier_head notifier;
+};
+
/* events for the backend driver notify callback */
enum vfio_iommu_notify_type {
VFIO_IOMMU_CONTAINER_CLOSE = 0,
@@ -67,5 +101,33 @@ struct vfio_iommu_driver_ops {
enum vfio_iommu_notify_type event);
};
+struct vfio_iommu_driver {
+ const struct vfio_iommu_driver_ops *ops;
+ struct list_head vfio_next;
+};
+
int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);
+
+bool vfio_assert_device_open(struct vfio_device *device);
+
+struct vfio_container *vfio_container_from_file(struct file *filep);
+int vfio_device_assign_container(struct vfio_device *device);
+void vfio_device_unassign_container(struct vfio_device *device);
+int vfio_container_attach_group(struct vfio_container *container,
+ struct vfio_group *group);
+void vfio_group_detach_container(struct vfio_group *group);
+void vfio_device_container_register(struct vfio_device *device);
+void vfio_device_container_unregister(struct vfio_device *device);
+long vfio_container_ioctl_check_extension(struct vfio_container *container,
+ unsigned long arg);
+int __init vfio_container_init(void);
+void vfio_container_cleanup(void);
+
+#ifdef CONFIG_VFIO_NOIOMMU
+extern bool vfio_noiommu __read_mostly;
+#else
+enum { vfio_noiommu = false };
+#endif
+
+#endif