Add a io-tlb-segsize property that each restricted-dma-pool can set its own io_tlb_segsize since some use cases require slabs larger than default value (128).
Signed-off-by: Hsin-Yi Wang <[email protected]> --- .../bindings/reserved-memory/shared-dma-pool.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml b/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml index a4bf757d6881de..6198bf6b76f0b2 100644 --- a/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml +++ b/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml @@ -56,6 +56,14 @@ properties: If this property is present, then Linux will use the region for the default pool of the consistent DMA allocator. + io-tlb-segsize: + type: u32 + description: > + Each restricted-dma-pool can use this property to set its own + io_tlb_segsize. If not set, it will use the default value + IO_TLB_SEGSIZE defined in include/linux/swiotlb.h. The value has + to be a power of 2, otherwise it will fall back to IO_TLB_SEGSIZE. + unevaluatedProperties: false examples: -- 2.34.0.rc2.393.gf8c9666880-goog _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
