Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / asm-generic / dma-coherent.h

diff --git a/kernel/include/asm-generic/dma-coherent.h b/kernel/include/asm-generic/dma-coherent.h
new file mode 100644 (file)
index 0000000..0297e58
--- /dev/null
+++ b/kernel/include/asm-generic/dma-coherent.h
@@ -0,0 +1,32 @@
+#ifndef DMA_COHERENT_H
+#define DMA_COHERENT_H
+
+#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
+/*
+ * These three functions are only for dma allocator.
+ * Don't use them in device drivers.
+ */
+int dma_alloc_from_coherent(struct device *dev, ssize_t size,
+                                      dma_addr_t *dma_handle, void **ret);
+int dma_release_from_coherent(struct device *dev, int order, void *vaddr);
+
+int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
+                           void *cpu_addr, size_t size, int *ret);
+/*
+ * Standard interface
+ */
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
+                               dma_addr_t device_addr, size_t size, int flags);
+
+void dma_release_declared_memory(struct device *dev);
+
+void *dma_mark_declared_memory_occupied(struct device *dev,
+                                       dma_addr_t device_addr, size_t size);
+#else
+#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
+#define dma_release_from_coherent(dev, order, vaddr) (0)
+#define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0)
+#endif
+
+#endif