diff options
| author |   Alexander Duyck <alexander.h.duyck@intel.com> | 2012-10-15 10:19:44 -0700 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-30 09:32:07 -0400 |
| commit | 61ca08c3220032dd88815b3465d56cb779258168 (patch) | |
| tree | b126015d4fd76ff1e4b936097877e734aa19746b /drivers/xen/swiotlb-xen.c | |
| parent | swiotlb: Return physical addresses when calling swiotlb_tbl_map_single (diff) | |
| download | linux-dev-61ca08c3220032dd88815b3465d56cb779258168.tar.xz linux-dev-61ca08c3220032dd88815b3465d56cb779258168.zip | |
swiotlb: Use physical addresses for swiotlb_tbl_unmap_single
This change makes it so that the unmap functionality also uses physical
addresses. This helps to further reduce the use of virt_to_phys and
phys_to_virt functions.
In order to clarify things since we now have 2 physical addresses in use
inside of swiotlb_tbl_unmap_single I am renaming phys to orig_addr, and
dma_addr to tlb_addr. This way is should be clear that orig_addr is
contained within io_orig_addr and tlb_addr is an address within the
io_tlb_addr buffer.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/swiotlb-xen.c')
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 8a6035aa69c9..4cedc284b5df 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -364,7 +364,7 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, * Ensure that the address returned is DMA'ble */ if (!dma_capable(dev, dev_addr, size)) { - swiotlb_tbl_unmap_single(dev, phys_to_virt(map), size, dir); + swiotlb_tbl_unmap_single(dev, map, size, dir); dev_addr = 0; } return dev_addr; @@ -388,7 +388,7 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr, /* NOTE: We use dev_addr here, not paddr! */ if (is_xen_swiotlb_buffer(dev_addr)) { - swiotlb_tbl_unmap_single(hwdev, phys_to_virt(paddr), size, dir); + swiotlb_tbl_unmap_single(hwdev, paddr, size, dir); return; } |