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iommufd: Add helper to retrieve iommufd_ctx and devid 

This is needed by the vfio-pci driver to report affected devices in the
hot-reset for a given device.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718105542.4138-6-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yi Liu 2023-07-18 03:55:37 -07:00 committed by Alex Williamson
parent 86b0a96c29
commit 78d3df457a
2 changed files with 15 additions and 0 deletions
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12
drivers/iommu/iommufd/device.c
View File

@ -146,6 +146,18 @@ void iommufd_device_unbind(struct iommufd_device *idev)
}
EXPORT_SYMBOL_NS_GPL(iommufd_device_unbind, IOMMUFD);
struct iommufd_ctx *iommufd_device_to_ictx(struct iommufd_device *idev)
{
return idev->ictx;
}
EXPORT_SYMBOL_NS_GPL(iommufd_device_to_ictx, IOMMUFD);
u32 iommufd_device_to_id(struct iommufd_device *idev)
{
return idev->obj.id;
}
EXPORT_SYMBOL_NS_GPL(iommufd_device_to_id, IOMMUFD);
static int iommufd_device_setup_msi(struct iommufd_device *idev,
struct iommufd_hw_pagetable *hwpt,
phys_addr_t sw_msi_start)

3
include/linux/iommufd.h
View File

@ -25,6 +25,9 @@ void iommufd_device_unbind(struct iommufd_device *idev);
int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id);
void iommufd_device_detach(struct iommufd_device *idev);
struct iommufd_ctx *iommufd_device_to_ictx(struct iommufd_device *idev);
u32 iommufd_device_to_id(struct iommufd_device *idev);
struct iommufd_access_ops {
u8 needs_pin_pages : 1;
void (*unmap)(void *data, unsigned long iova, unsigned long length);