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swiotlb: change swiotlb_bus_to[phys,virt] prototypes

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Add a hwdev argument that is needed on some architectures
in order to access a per-device offset that is taken into
account when producing a physical address (also needed to
get from bus address to virtual address because the physical
address is an intermediate step).

Also make swiotlb_bus_to_virt weak so architectures can
override it.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Cc: jeremy@goop.org
Cc: ian.campbell@citrix.com
LKML-Reference: <1239199761-22886-8-git-send-email-galak@kernel.crashing.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Becky Bruce 2009-04-08 09:09:21 -05:00 committed by Ingo Molnar
parent 380d687833
commit 42d7c5e353
3 changed files with 8 additions and 7 deletions
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2
arch/x86/kernel/pci-swiotlb.c
View file

@ -28,7 +28,7 @@ dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
return paddr;
}
phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}

3
include/linux/swiotlb.h
View file

@ -29,7 +29,8 @@ extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
phys_addr_t address);
extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
dma_addr_t address);
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);

10
lib/swiotlb.c
View file

@ -129,7 +129,7 @@ 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(dma_addr_t baddr)
phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}
@ -140,9 +140,9 @@ static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
}
static void *swiotlb_bus_to_virt(dma_addr_t address)
void * __weak swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address)
{
return phys_to_virt(swiotlb_bus_to_phys(address));
return phys_to_virt(swiotlb_bus_to_phys(hwdev, address));
}
int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
@ -691,7 +691,7 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page);
static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
{
char *dma_addr = swiotlb_bus_to_virt(dev_addr);
char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
BUG_ON(dir == DMA_NONE);
@ -728,7 +728,7 @@ static void
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, int target)
{
char *dma_addr = swiotlb_bus_to_virt(dev_addr);
char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
BUG_ON(dir == DMA_NONE);