diff options
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 62 |
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 |