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Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
-rw-r--r--arch/arm/mm/dma-mapping.c59
1 files changed, 30 insertions, 29 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index bbf87880b91..77dc483e64c 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -447,48 +447,25 @@ void ___dma_single_dev_to_cpu(const void *kaddr, size_t size,
EXPORT_SYMBOL(___dma_single_dev_to_cpu);
static void dma_cache_maint_contiguous(struct page *page, unsigned long offset,
- size_t size, int direction)
+ size_t size, void (*op)(const void *, const void *))
{
void *vaddr;
- unsigned long paddr;
- void (*inner_op)(const void *, const void *);
- void (*outer_op)(unsigned long, unsigned long);
-
- switch (direction) {
- case DMA_FROM_DEVICE: /* invalidate only */
- inner_op = dmac_inv_range;
- outer_op = outer_inv_range;
- break;
- case DMA_TO_DEVICE: /* writeback only */
- inner_op = dmac_clean_range;
- outer_op = outer_clean_range;
- break;
- case DMA_BIDIRECTIONAL: /* writeback and invalidate */
- inner_op = dmac_flush_range;
- outer_op = outer_flush_range;
- break;
- default:
- BUG();
- }
if (!PageHighMem(page)) {
vaddr = page_address(page) + offset;
- inner_op(vaddr, vaddr + size);
+ op(vaddr, vaddr + size);
} else {
vaddr = kmap_high_get(page);
if (vaddr) {
vaddr += offset;
- inner_op(vaddr, vaddr + size);
+ op(vaddr, vaddr + size);
kunmap_high(page);
}
}
-
- paddr = page_to_phys(page) + offset;
- outer_op(paddr, paddr + size);
}
static void dma_cache_maint_page(struct page *page, unsigned long offset,
- size_t size, int dir)
+ size_t size, void (*op)(const void *, const void *))
{
/*
* A single sg entry may refer to multiple physically contiguous
@@ -506,7 +483,7 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset,
}
len = PAGE_SIZE - offset;
}
- dma_cache_maint_contiguous(page, offset, len, dir);
+ dma_cache_maint_contiguous(page, offset, len, op);
offset = 0;
page++;
left -= len;
@@ -516,7 +493,31 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset,
void ___dma_page_cpu_to_dev(struct page *page, unsigned long off,
size_t size, enum dma_data_direction dir)
{
- dma_cache_maint_page(page, off, size, dir);
+ unsigned long paddr;
+ void (*inner_op)(const void *, const void *);
+ void (*outer_op)(unsigned long, unsigned long);
+
+ switch (direction) {
+ case DMA_FROM_DEVICE: /* invalidate only */
+ inner_op = dmac_inv_range;
+ outer_op = outer_inv_range;
+ break;
+ case DMA_TO_DEVICE: /* writeback only */
+ inner_op = dmac_clean_range;
+ outer_op = outer_clean_range;
+ break;
+ case DMA_BIDIRECTIONAL: /* writeback and invalidate */
+ inner_op = dmac_flush_range;
+ outer_op = outer_flush_range;
+ break;
+ default:
+ BUG();
+ }
+
+ dma_cache_maint_page(page, off, size, inner_op);
+
+ paddr = page_to_phys(page) + off;
+ outer_op(paddr, paddr + size);
}
EXPORT_SYMBOL(___dma_page_cpu_to_dev);