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| author |   Jason Gunthorpe <jgg@nvidia.com> | 2022-07-19 21:02:49 -0300 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2022-07-20 11:57:59 -0600 |
| commit | 8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89 (patch) | |
| tree | f35b0994df95af7405e122e09256dae362586137 /drivers/vfio/vfio.h | |
| parent | vfio: Replace the DMA unmapping notifier with a callback (diff) | |
| download | linux-dev-8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89.tar.xz linux-dev-8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89.zip | |
vfio: Replace the iommu notifier with a device list
Instead of bouncing the function call to the driver op through a blocking
notifier just have the iommu layer call it directly.
Register each device that is being attached to the iommu with the lower
driver which then threads them on a linked list and calls the appropriate
driver op at the right time.
Currently the only use is if dma_unmap() is defined.
Also, fully lock all the debugging tests on the pinning path that a
dma_unmap is registered.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/2-v4-681e038e30fd+78-vfio_unmap_notif_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index 25da02ca1568..4a7db1f3c33e 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -33,9 +33,6 @@ enum vfio_iommu_notify_type { VFIO_IOMMU_CONTAINER_CLOSE = 0, }; -/* events for register_notifier() */ -#define VFIO_IOMMU_NOTIFY_DMA_UNMAP BIT(0) - /** * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks */ @@ -58,11 +55,10 @@ struct vfio_iommu_driver_ops { unsigned long *phys_pfn); int (*unpin_pages)(void *iommu_data, unsigned long *user_pfn, int npage); - int (*register_notifier)(void *iommu_data, - unsigned long *events, - struct notifier_block *nb); - int (*unregister_notifier)(void *iommu_data, - struct notifier_block *nb); + void (*register_device)(void *iommu_data, + struct vfio_device *vdev); + void (*unregister_device)(void *iommu_data, + struct vfio_device *vdev); int (*dma_rw)(void *iommu_data, dma_addr_t user_iova, void *data, size_t count, bool write); struct iommu_domain *(*group_iommu_domain)(void *iommu_data, |