4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
8 * OpenRISC implementation:
9 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
17 #ifndef __ASM_OPENRISC_DMA_MAPPING_H
18 #define __ASM_OPENRISC_DMA_MAPPING_H
21 * See Documentation/DMA-API-HOWTO.txt and
22 * Documentation/DMA-API.txt for documentation.
25 #include <linux/dma-debug.h>
26 #include <linux/kmemcheck.h>
27 #include <linux/dma-mapping.h>
29 #define DMA_ERROR_CODE (~(dma_addr_t)0x0)
31 extern struct dma_map_ops or1k_dma_map_ops;
33 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
35 return &or1k_dma_map_ops;
38 #include <asm-generic/dma-mapping-common.h>
40 static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
41 dma_addr_t *dma_handle, gfp_t gfp)
43 struct dma_attrs attrs;
45 dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
47 return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
50 static inline void dma_free_noncoherent(struct device *dev, size_t size,
51 void *cpu_addr, dma_addr_t dma_handle)
53 struct dma_attrs attrs;
55 dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
57 dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
60 static inline int dma_supported(struct device *dev, u64 dma_mask)
62 /* Support 32 bit DMA mask exclusively */
63 return dma_mask == DMA_BIT_MASK(32);
66 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
71 static inline int dma_set_mask(struct device *dev, u64 dma_mask)
73 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
76 *dev->dma_mask = dma_mask;
80 #endif /* __ASM_OPENRISC_DMA_MAPPING_H */