Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/kernel/arch/sh/include/asm/dma-mapping.h b/kernel/arch/sh/include/asm/dma-mapping.h
new file mode 100644
index 000000000..b437f2c78
--- /dev/null
+++ b/kernel/arch/sh/include/asm/dma-mapping.h
@@ -0,0 +1,100 @@
+#ifndef __ASM_SH_DMA_MAPPING_H
+#define __ASM_SH_DMA_MAPPING_H
+
+extern struct dma_map_ops *dma_ops;
+extern void no_iommu_init(void);
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	return dma_ops;
+}
+
+#include <asm-generic/dma-coherent.h>
+#include <asm-generic/dma-mapping-common.h>
+
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	if (ops->dma_supported)
+		return ops->dma_supported(dev, mask);
+
+	return 1;
+}
+
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	if (!dev->dma_mask || !dma_supported(dev, mask))
+		return -EIO;
+	if (ops->set_dma_mask)
+		return ops->set_dma_mask(dev, mask);
+
+	*dev->dma_mask = mask;
+
+	return 0;
+}
+
+void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+		    enum dma_data_direction dir);
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	debug_dma_mapping_error(dev, dma_addr);
+	if (ops->mapping_error)
+		return ops->mapping_error(dev, dma_addr);
+
+	return dma_addr == 0;
+}
+
+#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;
+
+	if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+		return memory;
+	if (!ops->alloc)
+		return NULL;
+
+	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 *vaddr, dma_addr_t dma_handle,
+				  struct dma_attrs *attrs)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	if (dma_release_from_coherent(dev, get_order(size), vaddr))
+		return;
+
+	debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+	if (ops->free)
+		ops->free(dev, size, vaddr, dma_handle, attrs);
+}
+
+/* arch/sh/mm/consistent.c */
+extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+					dma_addr_t *dma_addr, gfp_t flag,
+					struct dma_attrs *attrs);
+extern void dma_generic_free_coherent(struct device *dev, size_t size,
+				      void *vaddr, dma_addr_t dma_handle,
+				      struct dma_attrs *attrs);
+
+#endif /* __ASM_SH_DMA_MAPPING_H */