Prev: [PATCH 15/19] swiotlb-xen: Put 'swiotlb-xen.c' function declarations in the header.
Next: [PATCH 12/19] swiotlb-xen: Make 'xen_swiotlb_map_sg_attrs' work.
From: Konrad Rzeszutek Wilk on 22 Jun 2010 15:50
We don't use it at all.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com>
---
lib/swiotlb-xen.c | 25 ++++++++++++-------------
1 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/lib/swiotlb-xen.c b/lib/swiotlb-xen.c
index 6bba1a5..12e9dcd 100644
--- a/lib/swiotlb-xen.c
+++ b/lib/swiotlb-xen.c
@@ -47,20 +47,19 @@
static char *xen_io_tlb_start, *xen_io_tlb_end;
static unsigned long xen_io_tlb_nslabs;

-static dma_addr_t xen_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
+static dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
return phys_to_machine(XPADDR(paddr)).maddr;;
}

-static phys_addr_t xen_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
+static phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
return machine_to_phys(XMADDR(baddr)).paddr;
}

-static dma_addr_t xen_virt_to_bus(struct device *hwdev,
- void *address)
+static dma_addr_t xen_virt_to_bus(void *address)
{
- return xen_phys_to_bus(hwdev, virt_to_phys(address));
+ return xen_phys_to_bus(virt_to_phys(address));
}

static int check_pages_physically_contiguous(unsigned long pfn,
@@ -115,7 +114,7 @@ static void *
xen_map_single(struct device *hwdev, phys_addr_t phys, size_t size,
enum dma_data_direction dir)
{
- u64 start_dma_addr = xen_virt_to_bus(hwdev, xen_io_tlb_start);
+ u64 start_dma_addr = xen_virt_to_bus(xen_io_tlb_start);

return swiotlb_tbl_map_single(hwdev, start_dma_addr, phys, size, dir);
}
@@ -251,7 +250,7 @@ dma_addr_t xen_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 = xen_phys_to_bus(dev, phys);
+ dma_addr_t dev_addr = xen_phys_to_bus(phys);
void *map;

BUG_ON(dir == DMA_NONE);
@@ -271,7 +270,7 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
if (!map)
return DMA_ERROR_CODE;

- dev_addr = xen_virt_to_bus(dev, map);
+ dev_addr = xen_virt_to_bus(map);

/*
* Ensure that the address returned is DMA'ble
@@ -294,7 +293,7 @@ EXPORT_SYMBOL_GPL(xen_swiotlb_map_page);
static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir)
{
- phys_addr_t paddr = xen_bus_to_phys(hwdev, dev_addr);
+ phys_addr_t paddr = xen_bus_to_phys(dev_addr);

BUG_ON(dir == DMA_NONE);

@@ -339,7 +338,7 @@ xen_swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
enum dma_sync_target target)
{
- phys_addr_t paddr = xen_bus_to_phys(hwdev, dev_addr);
+ phys_addr_t paddr = xen_bus_to_phys(dev_addr);

BUG_ON(dir == DMA_NONE);

@@ -400,7 +399,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,

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

if (swiotlb_force ||
!dma_capable(hwdev, dev_addr, sg->length) ||
@@ -415,7 +414,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
sgl[0].dma_length = 0;
return DMA_ERROR_CODE;
}
- sg->dma_address = xen_virt_to_bus(hwdev, map);
+ sg->dma_address = xen_virt_to_bus(map);
} else
sg->dma_address = dev_addr;
sg->dma_length = sg->length;
@@ -512,6 +511,6 @@ EXPORT_SYMBOL_GPL(xen_swiotlb_dma_mapping_error);
int
xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)
{
- return xen_virt_to_bus(hwdev, xen_io_tlb_end - 1) <= mask;
+ return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask;
}
EXPORT_SYMBOL_GPL(xen_swiotlb_dma_supported);
--
1.7.0.1

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Prev: [PATCH 15/19] swiotlb-xen: Put 'swiotlb-xen.c' function declarations in the header.
Next: [PATCH 12/19] swiotlb-xen: Make 'xen_swiotlb_map_sg_attrs' work.