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swiotlb: remove swiotlb_arch_range_needs_mapping

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Nobody uses swiotlb_arch_range_needs_mapping().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
This commit is contained in:
FUJITA Tomonori 2009-07-10 10:04:52 +09:00
parent bb52196be3
commit cf56e3f2e8
3 changed files with 2 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

5
arch/x86/kernel/pci-swiotlb.c
View file

@ -23,11 +23,6 @@ phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
return baddr; return baddr;
} }
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags) dma_addr_t *dma_handle, gfp_t flags)
{ {

2
include/linux/swiotlb.h
View file

@ -28,8 +28,6 @@ extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
dma_addr_t address); dma_addr_t address);
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
extern void extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size, *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags); dma_addr_t *dma_handle, gfp_t flags);

15
lib/swiotlb.c
View file

@ -141,11 +141,6 @@ int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
} }
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
static void swiotlb_print_info(unsigned long bytes) static void swiotlb_print_info(unsigned long bytes)
{ {
phys_addr_t pstart, pend; phys_addr_t pstart, pend;
@ -312,11 +307,6 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
return swiotlb_arch_address_needs_mapping(hwdev, addr, size); return swiotlb_arch_address_needs_mapping(hwdev, addr, size);
} }
static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
{
return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size);
}
static int is_swiotlb_buffer(char *addr) static int is_swiotlb_buffer(char *addr)
{ {
return addr >= io_tlb_start && addr < io_tlb_end; return addr >= io_tlb_start && addr < io_tlb_end;
@ -646,8 +636,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
* we can safely return the device addr and not worry about bounce * we can safely return the device addr and not worry about bounce
* buffering it. * buffering it.
*/ */
if (!address_needs_mapping(dev, dev_addr, size) && if (!address_needs_mapping(dev, dev_addr, size) && !swiotlb_force)
!range_needs_mapping(phys, size))
return dev_addr; return dev_addr;
/* /*
@ -810,7 +799,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
phys_addr_t paddr = sg_phys(sg); phys_addr_t paddr = sg_phys(sg);
dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr); dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr);
if (range_needs_mapping(paddr, sg->length) || if (swiotlb_force ||
address_needs_mapping(hwdev, dev_addr, sg->length)) { address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, sg_phys(sg), void *map = map_single(hwdev, sg_phys(sg),
sg->length, dir); sg->length, dir);