@@ -54,6 +54,7 @@
#ifdef __KERNEL__
#include <linux/device.h>
+#include <linux/mm.h>
struct cma;
struct page;
@@ -159,15 +160,20 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages,
return false;
}
+/* Use fallback alloc() and free() when CONFIG_DMA_CMA=n */
static inline struct page *dma_alloc_contiguous(struct device *dev, size_t size,
gfp_t gfp)
{
- return NULL;
+ int node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
+ size_t align = get_order(PAGE_ALIGN(size));
+
+ return alloc_pages_node(node, gfp, align);
}
static inline void dma_free_contiguous(struct device *dev, struct page *page,
size_t size)
{
+ __free_pages(page, get_order(size));
}
#endif