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, 104 insertions, 0 deletions

diff --git a/kernel/arch/mips/include/asm/dma-mapping.h b/kernel/arch/mips/include/asm/dma-mapping.h
new file mode 100644
index 000000000..fd1b4a150
--- /dev/null
+++ b/kernel/arch/mips/include/asm/dma-mapping.h
@@ -0,0 +1,104 @@
+#ifndef _ASM_DMA_MAPPING_H
+#define _ASM_DMA_MAPPING_H
+
+#include <asm/scatterlist.h>
+#include <asm/dma-coherence.h>
+#include <asm/cache.h>
+#include <asm-generic/dma-coherent.h>
+
+#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
+#include <dma-coherence.h>
+#endif
+
+extern struct dma_map_ops *mips_dma_map_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	if (dev && dev->archdata.dma_ops)
+		return dev->archdata.dma_ops;
+	else
+		return mips_dma_map_ops;
+}
+
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+	if (!dev->dma_mask)
+		return false;
+
+	return addr + size <= *dev->dma_mask;
+}
+
+static inline void dma_mark_clean(void *addr, size_t size) {}
+
+#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);
+	return ops->dma_supported(dev, mask);
+}
+
+static inline int dma_mapping_error(struct device *dev, u64 mask)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	debug_dma_mapping_error(dev, mask);
+	return ops->mapping_error(dev, mask);
+}
+
+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;
+}
+
+extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+	       enum dma_data_direction direction);
+
+#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)
+{
+	void *ret;
+	struct dma_map_ops *ops = get_dma_ops(dev);
+
+	ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
+
+	debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
+
+	return ret;
+}
+
+#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);
+
+	ops->free(dev, size, vaddr, dma_handle, attrs);
+
+	debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+}
+
+
+void *dma_alloc_noncoherent(struct device *dev, size_t size,
+			   dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_noncoherent(struct device *dev, size_t size,
+			 void *vaddr, dma_addr_t dma_handle);
+
+#endif /* _ASM_DMA_MAPPING_H */