lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sparc: use dma_map_page instead of dma_map_single

Browse Source 
This patch converts dma_map_single and dma_unmap_single to use
map_page and unmap_page respectively and removes unnecessary
map_single and unmap_single. map_page can be used to implement
map_single but the opposite is impossible. Having only dma_map_page in
struct dma_ops is enough.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
FUJITA Tomonori
2009-05-14 16:23:10 +00:00
committed by David S. Miller
parent 2e8fcfe2e5
commit 797a756865
3 changed files with 28 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/sparc/kernel/iommu.c
View File

@@ -351,8 +351,9 @@ static void dma_4u_free_coherent(struct device *dev, size_t size,
free_pages((unsigned long)cpu, order);
}
static dma_addr_t dma_4u_map_single(struct device *dev, void *ptr, size_t sz,
enum dma_data_direction direction)
static dma_addr_t dma_4u_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t sz,
enum dma_data_direction direction)
{
struct iommu *iommu;
struct strbuf *strbuf;
@@ -368,7 +369,7 @@ static dma_addr_t dma_4u_map_single(struct device *dev, void *ptr, size_t sz,
if (unlikely(direction == DMA_NONE))
goto bad_no_ctx;
oaddr = (unsigned long)ptr;
oaddr = (unsigned long)(page_address(page) + offset);
npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
npages >>= IO_PAGE_SHIFT;
@@ -472,8 +473,8 @@ do_flush_sync:
vaddr, ctx, npages);
}
static void dma_4u_unmap_single(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction)
static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction)
{
struct iommu *iommu;
struct strbuf *strbuf;
@@ -824,8 +825,8 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
static const struct dma_ops sun4u_dma_ops = {
.alloc_coherent = dma_4u_alloc_coherent,
.free_coherent = dma_4u_free_coherent,
.map_single = dma_4u_map_single,
.unmap_single = dma_4u_unmap_single,
.map_page = dma_4u_map_page,
.unmap_page = dma_4u_unmap_page,
.map_sg = dma_4u_map_sg,
.unmap_sg = dma_4u_unmap_sg,
.sync_single_for_cpu = dma_4u_sync_single_for_cpu,

15
arch/sparc/kernel/pci_sun4v.c
View File

@@ -230,8 +230,9 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu,
free_pages((unsigned long)cpu, order);
}
static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz,
enum dma_data_direction direction)
static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t sz,
enum dma_data_direction direction)
{
struct iommu *iommu;
unsigned long flags, npages, oaddr;
@@ -245,7 +246,7 @@ static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz,
if (unlikely(direction == DMA_NONE))
goto bad;
oaddr = (unsigned long)ptr;
oaddr = (unsigned long)(page_address(page) + offset);
npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
npages >>= IO_PAGE_SHIFT;
@@ -294,8 +295,8 @@ iommu_map_fail:
return DMA_ERROR_CODE;
}
static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction)
static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction)
{
struct pci_pbm_info *pbm;
struct iommu *iommu;
@@ -537,8 +538,8 @@ static void dma_4v_sync_sg_for_cpu(struct device *dev,
static const struct dma_ops sun4v_dma_ops = {
.alloc_coherent = dma_4v_alloc_coherent,
.free_coherent = dma_4v_free_coherent,
.map_single = dma_4v_map_single,
.unmap_single = dma_4v_unmap_single,
.map_page = dma_4v_map_page,
.unmap_page = dma_4v_unmap_page,
.map_sg = dma_4v_map_sg,
.unmap_sg = dma_4v_unmap_sg,
.sync_single_for_cpu = dma_4v_sync_single_for_cpu,