swiotlb: allow arch override of address_needs_mapping (ef5722f6) · Commits · 戴 / test

Some architectures require additional checking to determine if a device can dma to an address and need to provide their own address_needs_mapping.. Signed-off-by:

Becky Bruce <beckyb@kernel.crashing.org> Acked-by:

FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by:

Kumar Gala <galak@kernel.crashing.org> Cc: jeremy@goop.org Cc: ian.campbell@citrix.com LKML-Reference: <1239199761-22886-5-git-send-email-galak@kernel.crashing.org> Signed-off-by:

Ingo Molnar <mingo@elte.hu>

lib/swiotlb.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -145,6 +145,12 @@ static void *swiotlb_bus_to_virt(dma_addr_t address)
		return phys_to_virt(swiotlb_bus_to_phys(address));
		}

		int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
		dma_addr_t addr, size_t size)
		{
		return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
		}

		int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
		{
		return 0;
		@@ -309,10 +315,10 @@ cleanup1:
		return -ENOMEM;
		}

		static int
		static inline int
		address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
		{
		return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
		return swiotlb_arch_address_needs_mapping(hwdev, addr, size);
		}

		static inline int range_needs_mapping(phys_addr_t paddr, size_t size)

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