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98962d6298
Enhance HostIOMMUDeviceIOMMUFD object with 3 new members, specific to the iommufd BE + 2 new class functions. IOMMUFD BE includes IOMMUFD handle, devid and hwpt_id. IOMMUFD handle and devid are used to allocate/free ioas and hwpt. hwpt_id is used to re-attach IOMMUFD backed device to its default VFIO sub-system created hwpt, i.e., when vIOMMU is disabled by guest. These properties are initialized in hiod::realize() after attachment. 2 new class functions are [at|de]tach_hwpt(). They are used to attach/detach hwpt. VFIO and VDPA can have different implementions, so implementation will be in sub-class instead of HostIOMMUDeviceIOMMUFD, e.g., in HostIOMMUDeviceIOMMUFDVFIO. Add two wrappers host_iommu_device_iommufd_[at|de]tach_hwpt to wrap the two functions. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/qemu-devel/20250604062115.4004200-3-zhenzhong.duan@intel.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
120 lines
4.4 KiB
C
120 lines
4.4 KiB
C
/*
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* iommufd container backend declaration
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*
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* Copyright (C) 2024 Intel Corporation.
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* Copyright Red Hat, Inc. 2024
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*
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* Authors: Yi Liu <yi.l.liu@intel.com>
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* Eric Auger <eric.auger@redhat.com>
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* Zhenzhong Duan <zhenzhong.duan@intel.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef SYSTEM_IOMMUFD_H
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#define SYSTEM_IOMMUFD_H
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#include "qom/object.h"
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#include "exec/hwaddr.h"
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#include "exec/cpu-common.h"
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#include "system/host_iommu_device.h"
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#define TYPE_IOMMUFD_BACKEND "iommufd"
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OBJECT_DECLARE_TYPE(IOMMUFDBackend, IOMMUFDBackendClass, IOMMUFD_BACKEND)
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struct IOMMUFDBackendClass {
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ObjectClass parent_class;
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};
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struct IOMMUFDBackend {
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Object parent;
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/*< protected >*/
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int fd; /* /dev/iommu file descriptor */
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bool owned; /* is the /dev/iommu opened internally */
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uint32_t users;
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/*< public >*/
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};
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bool iommufd_backend_connect(IOMMUFDBackend *be, Error **errp);
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void iommufd_backend_disconnect(IOMMUFDBackend *be);
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bool iommufd_backend_alloc_ioas(IOMMUFDBackend *be, uint32_t *ioas_id,
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Error **errp);
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void iommufd_backend_free_id(IOMMUFDBackend *be, uint32_t id);
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int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
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ram_addr_t size, void *vaddr, bool readonly);
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int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
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hwaddr iova, ram_addr_t size);
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bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
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uint32_t *type, void *data, uint32_t len,
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uint64_t *caps, Error **errp);
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bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint32_t dev_id,
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uint32_t pt_id, uint32_t flags,
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uint32_t data_type, uint32_t data_len,
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void *data_ptr, uint32_t *out_hwpt,
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Error **errp);
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bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_id,
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bool start, Error **errp);
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bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,
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uint64_t iova, ram_addr_t size,
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uint64_t page_size, uint64_t *data,
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Error **errp);
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bool iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t id,
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uint32_t data_type, uint32_t entry_len,
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uint32_t *entry_num, void *data,
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Error **errp);
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#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
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OBJECT_DECLARE_TYPE(HostIOMMUDeviceIOMMUFD, HostIOMMUDeviceIOMMUFDClass,
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HOST_IOMMU_DEVICE_IOMMUFD)
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/* Overload of the host IOMMU device for the iommufd backend */
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struct HostIOMMUDeviceIOMMUFD {
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HostIOMMUDevice parent_obj;
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IOMMUFDBackend *iommufd;
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uint32_t devid;
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uint32_t hwpt_id;
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};
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struct HostIOMMUDeviceIOMMUFDClass {
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HostIOMMUDeviceClass parent_class;
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/**
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* @attach_hwpt: attach host IOMMU device to IOMMUFD hardware page table.
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* VFIO and VDPA device can have different implementation.
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*
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* Mandatory callback.
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*
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* @idev: host IOMMU device backed by IOMMUFD backend.
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*
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* @hwpt_id: ID of IOMMUFD hardware page table.
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*
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* @errp: pass an Error out when attachment fails.
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*
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* Returns: true on success, false on failure.
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*/
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bool (*attach_hwpt)(HostIOMMUDeviceIOMMUFD *idev, uint32_t hwpt_id,
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Error **errp);
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/**
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* @detach_hwpt: detach host IOMMU device from IOMMUFD hardware page table.
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* VFIO and VDPA device can have different implementation.
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*
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* Mandatory callback.
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*
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* @idev: host IOMMU device backed by IOMMUFD backend.
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*
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* @errp: pass an Error out when attachment fails.
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*
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* Returns: true on success, false on failure.
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*/
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bool (*detach_hwpt)(HostIOMMUDeviceIOMMUFD *idev, Error **errp);
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};
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bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
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uint32_t hwpt_id, Error **errp);
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bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
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Error **errp);
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#endif
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