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/*
* iommufd container backend declaration
*
* Copyright (C) 2024 Intel Corporation.
* Copyright Red Hat, Inc. 2024
*
* Authors: Yi Liu <yi.l.liu@intel.com>
* Eric Auger <eric.auger@redhat.com>
* Zhenzhong Duan <zhenzhong.duan@intel.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef SYSTEM_IOMMUFD_H
#define SYSTEM_IOMMUFD_H
#include "qom/object.h"
#include "exec/hwaddr.h"
#include "exec/cpu-common.h"
#include "system/host_iommu_device.h"
#define TYPE_IOMMUFD_BACKEND "iommufd"
OBJECT_DECLARE_TYPE(IOMMUFDBackend, IOMMUFDBackendClass, IOMMUFD_BACKEND)
struct IOMMUFDBackendClass {
ObjectClass parent_class;
};
struct IOMMUFDBackend {
Object parent;
/*< protected >*/
int fd; /* /dev/iommu file descriptor */
bool owned; /* is the /dev/iommu opened internally */
Error *cpr_blocker;/* set if be does not support CPR */
uint32_t users;
/*< public >*/
};
bool iommufd_backend_connect(IOMMUFDBackend *be, Error **errp);
void iommufd_backend_disconnect(IOMMUFDBackend *be);
bool iommufd_backend_alloc_ioas(IOMMUFDBackend *be, uint32_t *ioas_id,
Error **errp);
void iommufd_backend_free_id(IOMMUFDBackend *be, uint32_t id);
int iommufd_backend_map_file_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size, int fd,
unsigned long start, bool readonly);
int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
ram_addr_t size, void *vaddr, bool readonly);
int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size);
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
uint64_t *caps, Error **errp);
bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
uint32_t pt_id, uint32_t flags,
uint32_t data_type, uint32_t data_len,
void *data_ptr, uint32_t *out_hwpt,
Error **errp);
bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
bool start, Error **errp);
bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,
uint64_t iova, ram_addr_t size,
uint64_t page_size, uint64_t *data,
Error **errp);
bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
uint32_t data_type, uint32_t entry_len,
uint32_t *entry_num, void *data,
Error **errp);
bool iommufd_change_process_capable(IOMMUFDBackend *be);
bool iommufd_change_process(IOMMUFDBackend *be, Error **errp);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
OBJECT_DECLARE_TYPE(HostIOMMUDeviceIOMMUFD, HostIOMMUDeviceIOMMUFDClass,
HOST_IOMMU_DEVICE_IOMMUFD)
/* Overload of the host IOMMU device for the iommufd backend */
struct HostIOMMUDeviceIOMMUFD {
HostIOMMUDevice parent_obj;
IOMMUFDBackend *iommufd;
uint32_t devid;
uint32_t hwpt_id;
};
struct HostIOMMUDeviceIOMMUFDClass {
HostIOMMUDeviceClass parent_class;
/**
* @attach_hwpt: attach host IOMMU device to IOMMUFD hardware page table.
* VFIO and VDPA device can have different implementation.
*
* Mandatory callback.
*
* @idev: host IOMMU device backed by IOMMUFD backend.
*
* @hwpt_id: ID of IOMMUFD hardware page table.
*
* @errp: pass an Error out when attachment fails.
*
* Returns: true on success, false on failure.
*/
bool (*attach_hwpt)(HostIOMMUDeviceIOMMUFD *idev, uint32_t hwpt_id,
Error **errp);
/**
* @detach_hwpt: detach host IOMMU device from IOMMUFD hardware page table.
* VFIO and VDPA device can have different implementation.
*
* Mandatory callback.
*
* @idev: host IOMMU device backed by IOMMUFD backend.
*
* @errp: pass an Error out when attachment fails.
*
* Returns: true on success, false on failure.
*/
bool (*detach_hwpt)(HostIOMMUDeviceIOMMUFD *idev, Error **errp);
};
bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
uint32_t hwpt_id, Error **errp);
bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
Error **errp);
#endif
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