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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-05-14 20:23:10 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-16 15:56:45 +0400 |
| commit | 797a75686528e9f6f9bfee2a719a00b47868c999 (patch) | |
| tree | 98f5aadddd6b373e69719b95bb2fd68fbe1fe29f /arch/sparc/kernel/pci_sun4v.c | |
| parent | 2e8fcfe2e51b2ee0fef3313e3c9ec25b9d6ed255 (diff) | |
| download | linux-797a75686528e9f6f9bfee2a719a00b47868c999.tar.xz | |
sparc: use dma_map_page instead of dma_map_single
This patch converts dma_map_single and dma_unmap_single to use
map_page and unmap_page respectively and removes unnecessary
map_single and unmap_single. map_page can be used to implement
map_single but the opposite is impossible. Having only dma_map_page in
struct dma_ops is enough.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/pci_sun4v.c')
| -rw-r--r-- | arch/sparc/kernel/pci_sun4v.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 5db5ebed35da..2485eaa23101 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -230,8 +230,9 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu, free_pages((unsigned long)cpu, order); } -static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz, - enum dma_data_direction direction) +static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t sz, + enum dma_data_direction direction) { struct iommu *iommu; unsigned long flags, npages, oaddr; @@ -245,7 +246,7 @@ static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz, if (unlikely(direction == DMA_NONE)) goto bad; - oaddr = (unsigned long)ptr; + oaddr = (unsigned long)(page_address(page) + offset); npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); npages >>= IO_PAGE_SHIFT; @@ -294,8 +295,8 @@ iommu_map_fail: return DMA_ERROR_CODE; } -static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr, - size_t sz, enum dma_data_direction direction) +static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, + size_t sz, enum dma_data_direction direction) { struct pci_pbm_info *pbm; struct iommu *iommu; @@ -537,8 +538,8 @@ static void dma_4v_sync_sg_for_cpu(struct device *dev, static const struct dma_ops sun4v_dma_ops = { .alloc_coherent = dma_4v_alloc_coherent, .free_coherent = dma_4v_free_coherent, - .map_single = dma_4v_map_single, - .unmap_single = dma_4v_unmap_single, + .map_page = dma_4v_map_page, + .unmap_page = dma_4v_unmap_page, .map_sg = dma_4v_map_sg, .unmap_sg = dma_4v_unmap_sg, .sync_single_for_cpu = dma_4v_sync_single_for_cpu, |