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| author |   Kirti Wankhede <kwankhede@nvidia.com> | 2016-11-17 02:16:17 +0530 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2016-11-17 08:24:58 -0700 |
| commit | 2169037dc322d8baa84d9bd4468995f818f25d82 (patch) | |
| tree | 46ce3027bbd5d283f3e4c8c18fabc6e2f1580e4c /include/linux/vfio.h | |
| parent | vfio: Common function to increment container_users (diff) | |
| download | wireguard-linux-2169037dc322d8baa84d9bd4468995f818f25d82.tar.xz wireguard-linux-2169037dc322d8baa84d9bd4468995f818f25d82.zip | |
vfio iommu: Added pin and unpin callback functions to vfio_iommu_driver_ops
Added APIs for pining and unpining set of pages. These call back into
backend iommu module to actually pin and unpin pages.
Added two new callback functions to struct vfio_iommu_driver_ops. Backend
IOMMU module that supports pining and unpinning pages for mdev devices
should provide these functions.
Renamed static functions in vfio_type1_iommu.c to resolve conflicts
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Reviewed-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 0ecae0b1cd34..3c862a030029 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -75,7 +75,11 @@ struct vfio_iommu_driver_ops { struct iommu_group *group); void (*detach_group)(void *iommu_data, struct iommu_group *group); - + int (*pin_pages)(void *iommu_data, unsigned long *user_pfn, + int npage, int prot, + unsigned long *phys_pfn); + int (*unpin_pages)(void *iommu_data, + unsigned long *user_pfn, int npage); }; extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops); @@ -92,6 +96,13 @@ extern int vfio_external_user_iommu_id(struct vfio_group *group); extern long vfio_external_check_extension(struct vfio_group *group, unsigned long arg); +#define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long)) + +extern int vfio_pin_pages(struct device *dev, 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 npage); + /* * Sub-module helpers */ |