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authorIan Campbell <Ian.Campbell@citrix.com>2009-01-09 21:32:09 +0300
committerIngo Molnar <mingo@elte.hu>2009-01-11 06:54:34 +0300
commit0b8698ab5847cbe25775083659f00c658a8161c9 (patch)
tree045bd39ac0d8c3bdd67d35bb5517f6b885183f57
parent0811a433c61e85f895018239c4466a36311cd5de (diff)
downloadlinux-0b8698ab5847cbe25775083659f00c658a8161c9.tar.xz
swiotlb: range_needs_mapping should take a physical address.
The swiotlb_arch_range_needs_mapping() hook should take a physical address rather than a virtual address in order to support highmem pages. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/kernel/pci-swiotlb_64.c2
-rw-r--r--include/linux/swiotlb.h2
-rw-r--r--lib/swiotlb.c10
3 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
index 5e32c4f6a7ba..34f12e9996ed 100644
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -33,7 +33,7 @@ phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
return baddr;
}
-int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
+int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 493dc17e7c87..ac9ff54f7cb3 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -31,7 +31,7 @@ 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 int swiotlb_arch_range_needs_mapping(void *ptr, size_t size);
+extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 30fe65ede2bb..31bae40830ca 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -145,7 +145,7 @@ static void *swiotlb_bus_to_virt(dma_addr_t address)
return phys_to_virt(swiotlb_bus_to_phys(address));
}
-int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
+int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
@@ -315,9 +315,9 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
}
-static inline int range_needs_mapping(void *ptr, size_t size)
+static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
{
- return swiotlb_force || swiotlb_arch_range_needs_mapping(ptr, size);
+ return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size);
}
static int is_swiotlb_buffer(char *addr)
@@ -653,7 +653,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
* buffering it.
*/
if (!address_needs_mapping(dev, dev_addr, size) &&
- !range_needs_mapping(ptr, size))
+ !range_needs_mapping(virt_to_phys(ptr), size))
return dev_addr;
/*
@@ -804,7 +804,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
void *addr = sg_virt(sg);
dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, addr);
- if (range_needs_mapping(addr, sg->length) ||
+ if (range_needs_mapping(sg_phys(sg), sg->length) ||
address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, sg_phys(sg),
sg->length, dir);