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Commit ef5722f6 authored by Becky Bruce's avatar Becky Bruce Committed by Ingo Molnar
Browse files

swiotlb: allow arch override of address_needs_mapping 



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: default avatarBecky Bruce <beckyb@kernel.crashing.org>
Acked-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarKumar 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: default avatarIngo Molnar <mingo@elte.hu>
parent dd6b02fe

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)