iommu/io-pgtable-arm: Rework to use the iommu-pages API

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Update the io-pgtable-arm allocator to use the iommu-pages API.

Replace the DMA API usage from __arm_lpae_alloc_pages() with
iommu_pages_start_incoherent() and from __arm_lpae_free_pages() with
iommu_pages_free_incoherent().

Since the iommu-pages API relies on metadata stored in the struct page
during iommu_alloc_pages_node_sz(), it cannot be used safely with memory
allocated via the custom cfg->alloc (which may not be backed by pages).
So, isolate that logic and keep it as it.

Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Mostafa Saleh 2026-05-13 21:52:02 +00:00 • committed by Joerg Roedel

parent 4315401bad

commit d996116cde

1 changed files with 56 additions and 23 deletions

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drivers/iommu/io-pgtable-arm.c

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