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vfio/mdev: Pass in a struct vfio_device * to vfio_pin/unpin_pages()

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Every caller has a readily available vfio_device pointer, use that instead
of passing in a generic struct device. The struct vfio_device already
contains the group we need so this avoids complexity, extra refcountings,
and a confusing lifecycle model.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-v4-8045e76bf00b+13d-vfio_mdev_no_group_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe
2022-05-11 13:12:59 -06:00
committed by Alex Williamson
parent 0a58795647
commit 8e432bb015
5 changed files with 27 additions and 42 deletions
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4
Documentation/driver-api/vfio-mediated-device.rst
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@@ -262,10 +262,10 @@ Translation APIs for Mediated Devices
The following APIs are provided for translating user pfn to host pfn in a VFIO
driver::
extern int vfio_pin_pages(struct device *dev, unsigned long *user_pfn,
int vfio_pin_pages(struct vfio_device *device, unsigned long *user_pfn,
int npage, int prot, unsigned long *phys_pfn);
extern int vfio_unpin_pages(struct device *dev, unsigned long *user_pfn,
int vfio_unpin_pages(struct vfio_device *device, unsigned long *user_pfn,
int npage);
These functions call back into the back-end IOMMU module by using the pin_pages