Re: [PATCH net-next 16/19] net/mlx5: Implement dma ops and params for mediated device

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On Thu, Nov 07, 2019 at 10:08:31AM -0600, Parav Pandit wrote:
> Implement dma ops wrapper to divert dma ops to its parent PCI device
> because Intel IOMMU (and may be other IOMMU) is limited to PCI devices.

Yikes.  I've been trying hard to get rid of pointless dma_map_ops
instance.  What upper layers use these child devices, and why can't
they just use the parent device for dma mapping directly?



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