From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/openrisc/include/asm/dma-mapping.h | 110 ++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 arch/openrisc/include/asm/dma-mapping.h

(limited to 'arch/openrisc/include/asm/dma-mapping.h')

diff --git a/arch/openrisc/include/asm/dma-mapping.h b/arch/openrisc/include/asm/dma-mapping.h
new file mode 100644
index 00000000..fab8628e
--- /dev/null
+++ b/arch/openrisc/include/asm/dma-mapping.h
@@ -0,0 +1,110 @@
+/*
+ * OpenRISC Linux
+ *
+ * Linux architectural port borrowing liberally from similar works of
+ * others.  All original copyrights apply as per the original source
+ * declaration.
+ *
+ * OpenRISC implementation:
+ * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_OPENRISC_DMA_MAPPING_H
+#define __ASM_OPENRISC_DMA_MAPPING_H
+
+/*
+ * See Documentation/DMA-API-HOWTO.txt and
+ * Documentation/DMA-API.txt for documentation.
+ */
+
+#include <linux/dma-debug.h>
+#include <asm-generic/dma-coherent.h>
+#include <linux/kmemcheck.h>
+#include <linux/dma-mapping.h>
+
+#define DMA_ERROR_CODE		(~(dma_addr_t)0x0)
+
+extern struct dma_map_ops or1k_dma_map_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	return &or1k_dma_map_ops;
+}
+
+#include <asm-generic/dma-mapping-common.h>
+
+#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) 
+
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+				    dma_addr_t *dma_handle, gfp_t gfp,
+				    struct dma_attrs *attrs)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+	void *memory;
+
+	memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
+
+	debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
+
+	return memory;
+}
+
+#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
+
+static inline void dma_free_attrs(struct device *dev, size_t size,
+				  void *cpu_addr, dma_addr_t dma_handle,
+				  struct dma_attrs *attrs)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+
+	ops->free(dev, size, cpu_addr, dma_handle, attrs);
+}
+
+static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
+					  dma_addr_t *dma_handle, gfp_t gfp)
+{
+	struct dma_attrs attrs;
+
+	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+
+	return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
+}
+
+static inline void dma_free_noncoherent(struct device *dev, size_t size,
+					 void *cpu_addr, dma_addr_t dma_handle)
+{
+	struct dma_attrs attrs;
+
+	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+
+	dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
+}
+
+static inline int dma_supported(struct device *dev, u64 dma_mask)
+{
+	/* Support 32 bit DMA mask exclusively */
+	return dma_mask == DMA_BIT_MASK(32);
+}
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+		return -EIO;
+
+	*dev->dma_mask = dma_mask;
+
+	return 0;
+}
+#endif	/* __ASM_OPENRISC_DMA_MAPPING_H */
-- 
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