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Diffstat (limited to 'arch/mips/mm/dma-default.c')
-rw-r--r--arch/mips/mm/dma-default.c37
1 files changed, 28 insertions, 9 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 33519ce49540..ae76795685cc 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -40,16 +40,38 @@ static inline int cpu_is_noncoherent_r10000(struct device *dev)
current_cpu_type() == CPU_R12000);
}
+static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
+{
+ /* ignore region specifiers */
+ gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);
+
+#ifdef CONFIG_ZONE_DMA32
+ if (dev == NULL)
+ gfp |= __GFP_DMA;
+ else if (dev->coherent_dma_mask < DMA_BIT_MASK(24))
+ gfp |= __GFP_DMA;
+ else
+#endif
+#ifdef CONFIG_ZONE_DMA32
+ if (dev->coherent_dma_mask < DMA_BIT_MASK(32))
+ gfp |= __GFP_DMA32;
+ else
+#endif
+ ;
+
+ /* Don't invoke OOM killer */
+ gfp |= __GFP_NORETRY;
+
+ return gfp;
+}
+
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
- /* ignore region specifiers */
- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+ gfp = massage_gfp_flags(dev, gfp);
- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
- gfp |= GFP_DMA;
ret = (void *) __get_free_pages(gfp, get_order(size));
if (ret != NULL) {
@@ -67,11 +89,8 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
{
void *ret;
- /* ignore region specifiers */
- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+ gfp = massage_gfp_flags(dev, gfp);
- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
- gfp |= GFP_DMA;
ret = (void *) __get_free_pages(gfp, get_order(size));
if (ret) {
@@ -343,7 +362,7 @@ int dma_supported(struct device *dev, u64 mask)
* so we can't guarantee allocations that must be
* within a tighter range than GFP_DMA..
*/
- if (mask < 0x00ffffff)
+ if (mask < DMA_BIT_MASK(24))
return 0;
return 1;