diff options
Diffstat (limited to 'lib/swiotlb.c')
| -rw-r--r-- | lib/swiotlb.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index a009055140ec..783aff00024c 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -361,25 +361,22 @@ static void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size, } } -/* - * Allocates bounce buffer and returns its kernel virtual address. - */ -static void * -map_single(struct device *hwdev, phys_addr_t phys, size_t size, int dir) +void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr, + phys_addr_t phys, size_t size, int dir) { unsigned long flags; char *dma_addr; unsigned int nslots, stride, index, wrap; int i; - unsigned long start_dma_addr; unsigned long mask; unsigned long offset_slots; unsigned long max_slots; mask = dma_get_seg_boundary(hwdev); - start_dma_addr = swiotlb_virt_to_bus(hwdev, io_tlb_start) & mask; - offset_slots = ALIGN(start_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; + tbl_dma_addr &= mask; + + offset_slots = ALIGN(tbl_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; /* * Carefully handle integer overflow which can occur when mask == ~0UL. @@ -468,6 +465,18 @@ found: } /* + * Allocates bounce buffer and returns its kernel virtual address. + */ + +static void * +map_single(struct device *hwdev, phys_addr_t phys, size_t size, int dir) +{ + dma_addr_t start_dma_addr = swiotlb_virt_to_bus(hwdev, io_tlb_start); + + return swiotlb_tbl_map_single(hwdev, start_dma_addr, phys, size, dir); +} + +/* * dma_addr is the kernel virtual address of the bounce buffer to unmap. */ static void |