1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2003 - 2005 Tensilica Inc.
7  * Copyright (C) 2015 Cadence Design Systems Inc.
8  */
9 
10 #ifndef _XTENSA_DMA_MAPPING_H
11 #define _XTENSA_DMA_MAPPING_H
12 
13 #include <asm/cache.h>
14 #include <asm/io.h>
15 
16 #include <asm-generic/dma-coherent.h>
17 
18 #include <linux/mm.h>
19 #include <linux/scatterlist.h>
20 
21 #define DMA_ERROR_CODE		(~(dma_addr_t)0x0)
22 
23 extern struct dma_map_ops xtensa_dma_map_ops;
24 
get_dma_ops(struct device * dev)25 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
26 {
27 	if (dev && dev->archdata.dma_ops)
28 		return dev->archdata.dma_ops;
29 	else
30 		return &xtensa_dma_map_ops;
31 }
32 
33 #include <asm-generic/dma-mapping-common.h>
34 
35 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
36 		    enum dma_data_direction direction);
37 
phys_to_dma(struct device * dev,phys_addr_t paddr)38 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
39 {
40 	return (dma_addr_t)paddr;
41 }
42 
dma_to_phys(struct device * dev,dma_addr_t daddr)43 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
44 {
45 	return (phys_addr_t)daddr;
46 }
47 
48 #endif	/* _XTENSA_DMA_MAPPING_H */
49