diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/swiotlb.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 977edbdbc1de..b5f5d1133042 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -283,6 +283,11 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr) return (addr & ~mask) != 0; } +static int is_swiotlb_buffer(char *addr) +{ + return addr >= io_tlb_start && addr < io_tlb_end; +} + /* * Allocates bounce buffer and returns its kernel virtual address. */ @@ -467,13 +472,6 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, void *ret; int order = get_order(size); - /* - * XXX fix me: the DMA API should pass us an explicit DMA mask - * instead, or use ZONE_DMA32 (ia64 overloads ZONE_DMA to be a ~32 - * bit range instead of a 16MB one). - */ - flags |= GFP_DMA; - ret = (void *)__get_free_pages(flags, order); if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) { /* @@ -490,12 +488,9 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, * swiotlb_map_single(), which will grab memory from * the lowest available address range. */ - dma_addr_t handle; - handle = swiotlb_map_single(NULL, NULL, size, DMA_FROM_DEVICE); - if (swiotlb_dma_mapping_error(hwdev, handle)) + ret = map_single(hwdev, NULL, size, DMA_FROM_DEVICE); + if (!ret) return NULL; - - ret = bus_to_virt(handle); } memset(ret, 0, size); @@ -518,12 +513,11 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle) { WARN_ON(irqs_disabled()); - if (!(vaddr >= (void *)io_tlb_start - && vaddr < (void *)io_tlb_end)) + if (!is_swiotlb_buffer(vaddr)) free_pages((unsigned long) vaddr, get_order(size)); else /* DMA_TO_DEVICE to avoid memcpy in unmap_single */ - swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE); + unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE); } static void @@ -612,7 +606,7 @@ swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr, char *dma_addr = bus_to_virt(dev_addr); BUG_ON(dir == DMA_NONE); - if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end) + if (is_swiotlb_buffer(dma_addr)) unmap_single(hwdev, dma_addr, size, dir); else if (dir == DMA_FROM_DEVICE) dma_mark_clean(dma_addr, size); @@ -642,7 +636,7 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, char *dma_addr = bus_to_virt(dev_addr); BUG_ON(dir == DMA_NONE); - if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end) + if (is_swiotlb_buffer(dma_addr)) sync_single(hwdev, dma_addr, size, dir, target); else if (dir == DMA_FROM_DEVICE) dma_mark_clean(dma_addr, size); @@ -673,7 +667,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr, char *dma_addr = bus_to_virt(dev_addr) + offset; BUG_ON(dir == DMA_NONE); - if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end) + if (is_swiotlb_buffer(dma_addr)) sync_single(hwdev, dma_addr, size, dir, target); else if (dir == DMA_FROM_DEVICE) dma_mark_clean(dma_addr, size); |