1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/plat-s5p/include/plat/s5p-iovmm.h b/arch/arm/plat-s5p/include/plat/s5p-iovmm.h
new file mode 100644
index 0000000..2e31ce3
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/s5p-iovmm.h
@@ -0,0 +1,55 @@
+/* linux/arch/arm/plat-s5p/include/plat/iovmm.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_PLAT_IOVMM_H
+#define __ASM_PLAT_IOVMM_H
+
+#ifdef CONFIG_IOVMM
+int iovmm_setup(struct device *dev);
+void iovmm_cleanup(struct device *dev);
+int iovmm_activate(struct device *dev);
+void iovmm_deactivate(struct device *dev);
+
+/* iovmm_map() - Maps a list of physical memory chunks
+ * @dev: the owner of the IO address space where the mapping is created
+ * @sg: list of physical memory chunks to map
+ * @offset: length in bytes where the mapping starts
+ * @size: how much memory to map in bytes. @offset + @size must not exceed
+ *        total size of @sg
+ *
+ * This function returns mapped IO address in the address space of @dev.
+ * Returns 0 if mapping fails.
+ *
+ * The caller of this function must ensure that iovmm_cleanup() is not called
+ * while this function is called.
+ *
+ */
+dma_addr_t iovmm_map(struct device *dev, struct scatterlist *sg, off_t offset,
+								size_t size);
+
+/* iovmm_map() - unmaps the given IO address
+ * @dev: the owner of the IO address space where @iova belongs
+ * @iova: IO address that needs to be unmapped and freed.
+ *
+ * The caller of this function must ensure that iovmm_cleanup() is not called
+ * while this function is called.
+ */
+void iovmm_unmap(struct device *dev, dma_addr_t iova);
+
+#else
+#define iovmm_setup(dev)	(-ENOSYS)
+#define iovmm_cleanup(dev)
+#define iovmm_activate(dev)	(-ENOSYS)
+#define iovmm_deactivate(dev)
+#define iovmm_map(dev, sg)	(0)
+#define iovmm_unmap(dev, iova)
+#endif /* CONFIG_IOVMM */
+
+#endif /*__ASM_PLAT_IOVMM_H*/