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, 150 insertions, 0 deletions

diff --git a/kernel/arch/frv/include/asm/dma-mapping.h b/kernel/arch/frv/include/asm/dma-mapping.h
new file mode 100644
index 000000000..1746a2b8e
--- /dev/null
+++ b/kernel/arch/frv/include/asm/dma-mapping.h
@@ -0,0 +1,150 @@
+#ifndef _ASM_DMA_MAPPING_H
+#define _ASM_DMA_MAPPING_H
+
+#include <linux/device.h>
+#include <asm/cache.h>
+#include <asm/cacheflush.h>
+#include <asm/scatterlist.h>
+#include <asm/io.h>
+
+/*
+ * See Documentation/DMA-API.txt for the description of how the
+ * following DMA API should work.
+ */
+
+#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)
+
+extern unsigned long __nongprelbss dma_coherent_mem_start;
+extern unsigned long __nongprelbss dma_coherent_mem_end;
+
+void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp);
+void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle);
+
+extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+				 enum dma_data_direction direction);
+
+static inline
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		      enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+		      enum dma_data_direction direction);
+
+static inline
+void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+	     enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+extern
+dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+			size_t size, enum dma_data_direction direction);
+
+static inline
+void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+		    enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+
+static inline
+void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+			     enum dma_data_direction direction)
+{
+}
+
+static inline
+void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+				enum dma_data_direction direction)
+{
+	flush_write_buffers();
+}
+
+static inline
+void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+				   unsigned long offset, size_t size,
+				   enum dma_data_direction direction)
+{
+}
+
+static inline
+void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+				      unsigned long offset, size_t size,
+				      enum dma_data_direction direction)
+{
+	flush_write_buffers();
+}
+
+static inline
+void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+			 enum dma_data_direction direction)
+{
+}
+
+static inline
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+			    enum dma_data_direction direction)
+{
+	flush_write_buffers();
+}
+
+static inline
+int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+static inline
+int dma_supported(struct device *dev, u64 mask)
+{
+        /*
+         * we fall back to GFP_DMA when the mask isn't all 1s,
+         * so we can't guarantee allocations that must be
+         * within a tighter range than GFP_DMA..
+         */
+        if (mask < 0x00ffffff)
+                return 0;
+
+	return 1;
+}
+
+static inline
+int dma_set_mask(struct device *dev, u64 mask)
+{
+	if (!dev->dma_mask || !dma_supported(dev, mask))
+		return -EIO;
+
+	*dev->dma_mask = mask;
+
+	return 0;
+}
+
+static inline
+void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+		    enum dma_data_direction direction)
+{
+	flush_write_buffers();
+}
+
+/* Not supported for now */
+static inline int dma_mmap_coherent(struct device *dev,
+				    struct vm_area_struct *vma, void *cpu_addr,
+				    dma_addr_t dma_addr, size_t size)
+{
+	return -EINVAL;
+}
+
+static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
+				  void *cpu_addr, dma_addr_t dma_addr,
+				  size_t size)
+{
+	return -EINVAL;
+}
+
+#endif  /* _ASM_DMA_MAPPING_H */