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Subject[PATCH 13/15] swiotlb: use phys_to_dma and dma_to_phys
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This converts swiotlb to use phys_to_dma and dma_to_phys instead of
swiotlb_phys_to_bus() and swiotlb_bus_to_phys().

swiotlb_phys_to_bus() and swiotlb_bus_to_phys() are not necessary so
this patch also removes them.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
include/linux/swiotlb.h | 5 -----
lib/swiotlb.c | 22 ++++++----------------
2 files changed, 6 insertions(+), 21 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index a977da2..73b1f1c 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -23,11 +23,6 @@ struct scatterlist;
extern void
swiotlb_init(void);

-extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
- phys_addr_t address);
-extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
- dma_addr_t address);
-
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags);
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index a0faeb0..de71dba 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -114,20 +114,10 @@ setup_io_tlb_npages(char *str)
__setup("swiotlb=", setup_io_tlb_npages);
/* make io_tlb_overflow tunable too? */

-dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
-{
- return paddr;
-}
-
-phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
-{
- return baddr;
-}
-
static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
volatile void *address)
{
- return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
+ return phys_to_dma(hwdev, virt_to_phys(address));
}

static void swiotlb_print_info(unsigned long bytes)
@@ -566,7 +556,7 @@ void
swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dev_addr)
{
- phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+ phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);

WARN_ON(irqs_disabled());
if (!is_swiotlb_buffer(paddr))
@@ -611,7 +601,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
struct dma_attrs *attrs)
{
phys_addr_t phys = page_to_phys(page) + offset;
- dma_addr_t dev_addr = swiotlb_phys_to_bus(dev, phys);
+ dma_addr_t dev_addr = phys_to_dma(dev, phys);
void *map;

BUG_ON(dir == DMA_NONE);
@@ -655,7 +645,7 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page);
static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
{
- phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+ phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);

BUG_ON(dir == DMA_NONE);

@@ -692,7 +682,7 @@ static void
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, int target)
{
- phys_addr_t paddr = swiotlb_bus_to_phys(hwdev, dev_addr);
+ phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);

BUG_ON(dir == DMA_NONE);

@@ -781,7 +771,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,

for_each_sg(sgl, sg, nelems, i) {
phys_addr_t paddr = sg_phys(sg);
- dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr);
+ dma_addr_t dev_addr = phys_to_dma(hwdev, paddr);

if (swiotlb_force ||
!dma_capable(hwdev, dev_addr, sg->length)) {
--
1.6.0.6


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