Messages in this thread | | | From | FUJITA Tomonori <> | Subject | [PATCH 0/4] add a helper function, is_buffer_dma_capable() | Date | Wed, 10 Sep 2008 01:06:45 +0900 |
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This patchset adds a trivial helper function, is_buffer_dma_capable() and cleans up some IOMMU implementations. This function is to to see if a memory region is DMA-capable or not with the arguments, the dma_mask (or coherent_dma_mask) of a device and the address and size of a memory region. It's useful for IOMMUs that don't do virtual mappings at all times.
The patch for swiotlb is a bug fix (the rest are just cleanups). Currently, swiotlb doesn't take account of the size of a memory region to see if if the memory region is DMA-capable.
= arch/x86/kernel/pci-gart_64.c | 16 +++------------- arch/x86/kernel/pci-nommu.c | 10 ++++++---- include/linux/dma-mapping.h | 5 +++++ lib/swiotlb.c | 15 ++++++++------- 4 files changed, 22 insertions(+), 24 deletions(-)
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