Hi all, As promised, this series cleans up the flush queue code and streamlines it directly into iommu-dma. Since we no longer have per-driver DMA ops implementations, a lot of the abstraction is now no longer necessary, so there's a nice degree of simplification in the process. Un-abstracting the queued page freeing mechanism is also the perfect opportunity to revise which struct page fields we use so we can be better-behaved from the MM point of view, thanks to Matthew.
These changes should also make it viable to start using the gather freelist in io-pgtable-arm, and eliminate some more synchronous invalidations from the normal flow there, but that is proving to need a bit more careful thought than I have time for in this cycle, so I've parked that again for now and will revisit it in the new year. For convenience, branch at: https://gitlab.arm.com/linux-arm/linux-rm/-/tree/iommu/iova I've build-tested for x86_64, and boot-tested arm64 to the point of confirming that put_pages_list() gets passed a valid empty list when flushing, while everything else still works. Cheers, Robin. Matthew Wilcox (Oracle) (2): iommu/amd: Use put_pages_list iommu/vt-d: Use put_pages_list Robin Murphy (7): gpu: host1x: Add missing DMA API include iommu/iova: Squash entry_dtor abstraction iommu/iova: Squash flush_cb abstraction iommu/amd: Simplify pagetable freeing iommu/iova: Consolidate flush queue code iommu/iova: Move flush queue code to iommu-dma iommu: Move flush queue data into iommu_dma_cookie drivers/gpu/host1x/bus.c | 1 + drivers/iommu/amd/io_pgtable.c | 116 ++++++-------- drivers/iommu/dma-iommu.c | 266 +++++++++++++++++++++++++++------ drivers/iommu/intel/iommu.c | 89 ++++------- drivers/iommu/iova.c | 200 ------------------------- include/linux/iommu.h | 3 +- include/linux/iova.h | 69 +-------- 7 files changed, 295 insertions(+), 449 deletions(-) -- 2.28.0.dirty _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
