Commit 78d3df45 authored by Yi Liu's avatar Yi Liu Committed by Alex Williamson
Browse files

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: default avatarJason Gunthorpe <jgg@nvidia.com>
Tested-by: default avatarYanting Jiang <yanting.jiang@intel.com>
Tested-by: default avatarTerrence Xu <terrence.xu@intel.com>
Tested-by: default avatarZhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: default avatarYi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718105542.4138-6-yi.l.liu@intel.com


Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 86b0a96c

drivers/iommu/iommufd/device.c

+12 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/iommufd.h

+3 −0
Original line number Diff line number Diff line
@@ -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);