[PATCH 5/5] swiotlb: Allow arch override of address_needs_mapping

Becky Bruce
2009-03-24T21:46:24Z

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>
---
lib/swiotlb.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index b33180e..f365735 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -145,6 +145,12 @@ void __weak *swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address)
return phys_to_virt(swiotlb_bus_to_phys(hwdev, 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)
--
1.5.6.6