drivers: add Contiguous Memory Allocator

[pandora-kernel.git] / include / asm-generic / dma-contiguous.h

diff --git a/include/asm-generic/dma-contiguous.h b/include/asm-generic/dma-contiguous.h
new file mode 100644 (file)
index 0000000..c544356
--- /dev/null
+++ b/include/asm-generic/dma-contiguous.h
@@ -0,0 +1,28 @@
+#ifndef ASM_DMA_CONTIGUOUS_H
+#define ASM_DMA_CONTIGUOUS_H
+
+#ifdef __KERNEL__
+#ifdef CONFIG_CMA
+
+#include <linux/device.h>
+#include <linux/dma-contiguous.h>
+
+static inline struct cma *dev_get_cma_area(struct device *dev)
+{
+       if (dev && dev->cma_area)
+               return dev->cma_area;
+       return dma_contiguous_default_area;
+}
+
+static inline void dev_set_cma_area(struct device *dev, struct cma *cma)
+{
+       if (dev)
+               dev->cma_area = cma;
+       if (!dev || !dma_contiguous_default_area)
+               dma_contiguous_default_area = cma;
+}
+
+#endif
+#endif
+
+#endif