From: FUJITA Tomonori Date: Fri, 10 Jul 2009 01:04:59 +0000 (+0900) Subject: powerpc: remove unncesary swiotlb_arch_address_needs_mapping X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30945fdf6a08f52370dab3bc162e96c4b4e36082;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git powerpc: remove unncesary swiotlb_arch_address_needs_mapping swiotlb doesn't use swiotlb_arch_address_needs_mapping(); it uses dma_capalbe(). We can remove unnecessary swiotlb_arch_address_needs_mapping(). We can remove swiotlb_addr_needs_map() and is_buffer_dma_capable() in swiotlb_pci_addr_needs_map() too; dma_capable() handles the features that both provide. Signed-off-by: FUJITA Tomonori Acked-by: Becky Bruce --- diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index 41534ae2f589..a3bbe02cda98 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -35,29 +35,12 @@ phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr) return baddr - get_dma_direct_offset(hwdev); } -/* - * Determine if an address needs bounce buffering via swiotlb. - * Going forward I expect the swiotlb code to generalize on using - * a dma_ops->addr_needs_map, and this function will move from here to the - * generic swiotlb code. - */ -int -swiotlb_arch_address_needs_mapping(struct device *hwdev, dma_addr_t addr, - size_t size) -{ - struct dma_mapping_ops *dma_ops = get_dma_ops(hwdev); - - BUG_ON(!dma_ops); - return dma_ops->addr_needs_map(hwdev, addr, size); -} - /* * Determine if an address is reachable by a pci device, or if we must bounce. */ static int swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) { - u64 mask = dma_get_mask(hwdev); dma_addr_t max; struct pci_controller *hose; struct pci_dev *pdev = to_pci_dev(hwdev); @@ -69,16 +52,9 @@ swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) if ((addr + size > max) | (addr < hose->dma_window_base_cur)) return 1; - return !is_buffer_dma_capable(mask, addr, size); -} - -static int -swiotlb_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) -{ - return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); + return 0; } - /* * At the moment, all platforms that use this code only require * swiotlb to be used if we're operating on HIGHMEM. Since @@ -94,7 +70,6 @@ struct dma_mapping_ops swiotlb_dma_ops = { .dma_supported = swiotlb_dma_supported, .map_page = swiotlb_map_page, .unmap_page = swiotlb_unmap_page, - .addr_needs_map = swiotlb_addr_needs_map, .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, .sync_single_range_for_device = swiotlb_sync_single_range_for_device, .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,