From 8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Tue, 19 Jul 2022 21:02:49 -0300 Subject: 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 Reviewed-by: Kevin Tian Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/2-v4-681e038e30fd+78-vfio_unmap_notif_jgg@nvidia.com Signed-off-by: Alex Williamson --- drivers/vfio/vfio.h | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'drivers/vfio/vfio.h') 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, -- cgit v1.2.3