mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-26 20:44:32 +08:00
c3c0fa9d94
Pass the group flags to ->attach_group and remove the messy check for the bus type. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/20210924155705.4258-12-hch@lst.de Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
|
* Author: Alex Williamson <alex.williamson@redhat.com>
|
|
*/
|
|
|
|
enum vfio_group_type {
|
|
/*
|
|
* Physical device with IOMMU backing.
|
|
*/
|
|
VFIO_IOMMU,
|
|
|
|
/*
|
|
* Virtual device without IOMMU backing. The VFIO core fakes up an
|
|
* iommu_group as the iommu_group sysfs interface is part of the
|
|
* userspace ABI. The user of these devices must not be able to
|
|
* directly trigger unmediated DMA.
|
|
*/
|
|
VFIO_EMULATED_IOMMU,
|
|
|
|
/*
|
|
* Physical device without IOMMU backing. The VFIO core fakes up an
|
|
* iommu_group as the iommu_group sysfs interface is part of the
|
|
* userspace ABI. Users can trigger unmediated DMA by the device,
|
|
* usage is highly dangerous, requires an explicit opt-in and will
|
|
* taint the kernel.
|
|
*/
|
|
VFIO_NO_IOMMU,
|
|
};
|
|
|
|
/* events for the backend driver notify callback */
|
|
enum vfio_iommu_notify_type {
|
|
VFIO_IOMMU_CONTAINER_CLOSE = 0,
|
|
};
|
|
|
|
/**
|
|
* struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
|
|
*/
|
|
struct vfio_iommu_driver_ops {
|
|
char *name;
|
|
struct module *owner;
|
|
void *(*open)(unsigned long arg);
|
|
void (*release)(void *iommu_data);
|
|
long (*ioctl)(void *iommu_data, unsigned int cmd,
|
|
unsigned long arg);
|
|
int (*attach_group)(void *iommu_data,
|
|
struct iommu_group *group,
|
|
enum vfio_group_type);
|
|
void (*detach_group)(void *iommu_data,
|
|
struct iommu_group *group);
|
|
int (*pin_pages)(void *iommu_data,
|
|
struct iommu_group *group,
|
|
unsigned long *user_pfn,
|
|
int npage, int prot,
|
|
unsigned long *phys_pfn);
|
|
int (*unpin_pages)(void *iommu_data,
|
|
unsigned long *user_pfn, int npage);
|
|
int (*register_notifier)(void *iommu_data,
|
|
unsigned long *events,
|
|
struct notifier_block *nb);
|
|
int (*unregister_notifier)(void *iommu_data,
|
|
struct notifier_block *nb);
|
|
int (*dma_rw)(void *iommu_data, dma_addr_t user_iova,
|
|
void *data, size_t count, bool write);
|
|
struct iommu_domain *(*group_iommu_domain)(void *iommu_data,
|
|
struct iommu_group *group);
|
|
void (*notify)(void *iommu_data,
|
|
enum vfio_iommu_notify_type event);
|
|
};
|
|
|
|
int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
|
|
void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);
|