aboutsummaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
authorBecky Bruce <beckyb@kernel.crashing.org>2009-04-08 10:09:18 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-08 10:18:36 -0400
commitef5722f698bde01cfec2b98fff733a48663ebf55 (patch)
tree80eba1195866f2643d1343b318d9caa2b81aa347 /lib
parentdd6b02fe427f30520d0adc94aa52352367227873 (diff)
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>
Diffstat (limited to 'lib')
-rw-r--r--lib/swiotlb.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index e8a47c8cf77e..d81afab85167 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -145,6 +145,12 @@ static void *swiotlb_bus_to_virt(dma_addr_t address)
145 return phys_to_virt(swiotlb_bus_to_phys(address)); 145 return phys_to_virt(swiotlb_bus_to_phys(address));
146} 146}
147 147
148int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
149 dma_addr_t addr, size_t size)
150{
151 return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
152}
153
148int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size) 154int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
149{ 155{
150 return 0; 156 return 0;
@@ -309,10 +315,10 @@ cleanup1:
309 return -ENOMEM; 315 return -ENOMEM;
310} 316}
311 317
312static int 318static inline int
313address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size) 319address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
314{ 320{
315 return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); 321 return swiotlb_arch_address_needs_mapping(hwdev, addr, size);
316} 322}
317 323
318static inline int range_needs_mapping(phys_addr_t paddr, size_t size) 324static inline int range_needs_mapping(phys_addr_t paddr, size_t size)