Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / microblaze / include / asm / dma-mapping.h

diff --git a/kernel/arch/microblaze/include/asm/dma-mapping.h b/kernel/arch/microblaze/include/asm/dma-mapping.h
new file mode 100644 (file)
index 0000000..ab35372
--- /dev/null
+++ b/kernel/arch/microblaze/include/asm/dma-mapping.h
@@ -0,0 +1,142 @@
+/*
+ * Implements the generic device dma API for microblaze and the pci
+ *
+ * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2009-2010 PetaLogix
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * This file is base on powerpc and x86 dma-mapping.h versions
+ * Copyright (C) 2004 IBM
+ */
+
+#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
+#define _ASM_MICROBLAZE_DMA_MAPPING_H
+
+/*
+ * See Documentation/DMA-API-HOWTO.txt and
+ * Documentation/DMA-API.txt for documentation.
+ */
+
+#include <linux/types.h>
+#include <linux/cache.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-debug.h>
+#include <linux/dma-attrs.h>
+#include <asm/io.h>
+#include <asm-generic/dma-coherent.h>
+#include <asm/cacheflush.h>
+
+#define DMA_ERROR_CODE         (~(dma_addr_t)0x0)
+
+#define __dma_alloc_coherent(dev, gfp, size, handle)   NULL
+#define __dma_free_coherent(size, addr)                ((void)0)
+
+/*
+ * Available generic sets of operations
+ */
+extern struct dma_map_ops dma_direct_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+       return &dma_direct_ops;
+}
+
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+       struct dma_map_ops *ops = get_dma_ops(dev);
+
+       if (unlikely(!ops))
+               return 0;
+       if (!ops->dma_supported)
+               return 1;
+       return ops->dma_supported(dev, mask);
+}
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+       struct dma_map_ops *ops = get_dma_ops(dev);
+
+       if (unlikely(ops == NULL))
+               return -EIO;
+       if (ops->set_dma_mask)
+               return ops->set_dma_mask(dev, dma_mask);
+       if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+               return -EIO;
+       *dev->dma_mask = dma_mask;
+       return 0;
+}
+
+#include <asm-generic/dma-mapping-common.h>
+
+static inline void __dma_sync(unsigned long paddr,
+                             size_t size, enum dma_data_direction direction)
+{
+       switch (direction) {
+       case DMA_TO_DEVICE:
+       case DMA_BIDIRECTIONAL:
+               flush_dcache_range(paddr, paddr + size);
+               break;
+       case DMA_FROM_DEVICE:
+               invalidate_dcache_range(paddr, paddr + size);
+               break;
+       default:
+               BUG();
+       }
+}
+
+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 == DMA_ERROR_CODE);
+}
+
+#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)
+
+#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 flag,
+                                   struct dma_attrs *attrs)
+{
+       struct dma_map_ops *ops = get_dma_ops(dev);
+       void *memory;
+
+       BUG_ON(!ops);
+
+       memory = ops->alloc(dev, size, dma_handle, flag, 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);
+
+       BUG_ON(!ops);
+       debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+       ops->free(dev, size, cpu_addr, dma_handle, attrs);
+}
+
+static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+               enum dma_data_direction direction)
+{
+       BUG_ON(direction == DMA_NONE);
+       __dma_sync(virt_to_phys(vaddr), size, (int)direction);
+}
+
+#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */