xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

swiotlb: Use physical addresses for swiotlb_tbl_unmap_single

Browse Source 
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>
This commit is contained in:
Alexander Duyck
2012-10-15 10:19:44 -07:00
committed by Konrad Rzeszutek Wilk
parent e05ed4d1fa
commit 61ca08c322
3 changed files with 23 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/swiotlb.h
View File

@@ -43,7 +43,8 @@ extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
phys_addr_t phys, size_t size,
enum dma_data_direction dir);
extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
extern void swiotlb_tbl_unmap_single(struct device *hwdev,
phys_addr_t tlb_addr,
size_t size, enum dma_data_direction dir);
extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,