diff options
| -rw-r--r-- | arch/x86/kernel/pci-nommu.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index c70ab5a5d4c8..5a73a824ac1c 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -25,18 +25,25 @@ check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size) return 1; } -static dma_addr_t -nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, - int direction) +static dma_addr_t nommu_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) { - dma_addr_t bus = paddr; + dma_addr_t bus = page_to_phys(page) + offset; WARN_ON(size == 0); - if (!check_addr("map_single", hwdev, bus, size)) - return bad_dma_address; + if (!check_addr("map_single", dev, bus, size)) + return bad_dma_address; flush_write_buffers(); return bus; } +static dma_addr_t nommu_map_single(struct device *hwdev, phys_addr_t paddr, + size_t size, int direction) +{ + return nommu_map_page(hwdev, pfn_to_page(paddr >> PAGE_SHIFT), + paddr & ~PAGE_MASK, size, direction, NULL); +} /* Map a set of buffers described by scatterlist in streaming * mode for DMA. This is the scatter-gather version of the @@ -83,6 +90,7 @@ struct dma_mapping_ops nommu_dma_ops = { .free_coherent = nommu_free_coherent, .map_single = nommu_map_single, .map_sg = nommu_map_sg, + .map_page = nommu_map_page, .is_phys = 1, }; |