[ARM] 3209/1: Configurable DMA-consistent memory region
Patch from Kevin Hilman
This patch increase available DMA-consistent memory allocated by dma_coherent_alloc(). The default remains at 2M (defined in asm/memory.h) and each platform has the ability to override in asm/arch-foo/memory.h.
Signed-off-by: Kevin Hilman <kevin@hilman.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index 3d7f08b..b4e1146 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -25,6 +25,7 @@
#include <linux/config.h>
#include <linux/compiler.h>
#include <asm/arch/memory.h>
+#include <asm/sizes.h>
#ifndef TASK_SIZE
/*
@@ -48,6 +49,14 @@
#endif
/*
+ * Size of DMA-consistent memory region. Must be multiple of 2M,
+ * between 2MB and 14MB inclusive.
+ */
+#ifndef CONSISTENT_DMA_SIZE
+#define CONSISTENT_DMA_SIZE SZ_2M
+#endif
+
+/*
* Physical vs virtual RAM address space conversion. These are
* private definitions which should NOT be used outside memory.h
* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.