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Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
-rw-r--r--arch/arm/mm/dma-mapping.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 1aa664a..db23ae4 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -214,7 +214,8 @@ static int __init consistent_init(void)
core_initcall(consistent_init);
static void *
-__dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
+__dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot,
+ const void *caller)
{
struct arm_vmregion *c;
size_t align;
@@ -241,7 +242,7 @@ __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
* Allocate a virtual address in the consistent mapping region.
*/
c = arm_vmregion_alloc(&consistent_head, align, size,
- gfp & ~(__GFP_DMA | __GFP_HIGHMEM));
+ gfp & ~(__GFP_DMA | __GFP_HIGHMEM), caller);
if (c) {
pte_t *pte;
int idx = CONSISTENT_PTE_INDEX(c->vm_start);
@@ -320,14 +321,14 @@ static void __dma_free_remap(void *cpu_addr, size_t size)
#else /* !CONFIG_MMU */
-#define __dma_alloc_remap(page, size, gfp, prot) page_address(page)
+#define __dma_alloc_remap(page, size, gfp, prot, c) page_address(page)
#define __dma_free_remap(addr, size) do { } while (0)
#endif /* CONFIG_MMU */
static void *
__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
- pgprot_t prot)
+ pgprot_t prot, const void *caller)
{
struct page *page;
void *addr;
@@ -349,7 +350,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
return NULL;
if (!arch_is_coherent())
- addr = __dma_alloc_remap(page, size, gfp, prot);
+ addr = __dma_alloc_remap(page, size, gfp, prot, caller);
else
addr = page_address(page);
@@ -374,7 +375,8 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gf
return memory;
return __dma_alloc(dev, size, handle, gfp,
- pgprot_dmacoherent(pgprot_kernel));
+ pgprot_dmacoherent(pgprot_kernel),
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(dma_alloc_coherent);
@@ -386,7 +388,8 @@ void *
dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
{
return __dma_alloc(dev, size, handle, gfp,
- pgprot_writecombine(pgprot_kernel));
+ pgprot_writecombine(pgprot_kernel),
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(dma_alloc_writecombine);
@@ -723,6 +726,9 @@ EXPORT_SYMBOL(dma_set_mask);
static int __init dma_debug_do_init(void)
{
+#ifdef CONFIG_MMU
+ arm_vmregion_create_proc("dma-mappings", &consistent_head);
+#endif
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
return 0;
}