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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: 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>
This commit is contained in:
Becky Bruce 2009-04-08 09:09:18 -05:00 committed by Ingo Molnar
parent dd6b02fe42
commit ef5722f698
1 changed files with 8 additions and 2 deletions
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10
lib/swiotlb.c
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@ -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)