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authorJason Gunthorpe <jgg@nvidia.com>2022-07-20 03:02:49 +0300
committerAlex Williamson <alex.williamson@redhat.com>2022-07-20 20:57:59 +0300
commit8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89 (patch)
treef35b0994df95af7405e122e09256dae362586137 /drivers/vfio/vfio.h
parentce4b4657ff18925c315855aa290e93c5fa652d96 (diff)
downloadlinux-8cfc5b60751bcf9b4c6bbab3f6a72d59e0156a89.tar.xz
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.h12
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,