tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * DMA operations for the Hexagon architecture
3 *
4 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 and
8 * only version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA.
19 */
20
21#ifndef _ASM_DMA_MAPPING_H
22#define _ASM_DMA_MAPPING_H
23
24#include <linux/types.h>
25#include <linux/cache.h>
26#include <linux/mm.h>
27#include <linux/scatterlist.h>
28#include <linux/dma-debug.h>
29#include <linux/dma-attrs.h>
30#include <asm/io.h>
31
32struct device;
33extern int bad_dma_address;
34#define DMA_ERROR_CODE bad_dma_address
35
36extern struct dma_map_ops *dma_ops;
37
38static inline struct dma_map_ops *get_dma_ops(struct device *dev)
39{
40 if (unlikely(dev == NULL))
41 return NULL;
42
43 return dma_ops;
44}
45
46#define HAVE_ARCH_DMA_SUPPORTED 1
47extern int dma_supported(struct device *dev, u64 mask);
48extern int dma_is_consistent(struct device *dev, dma_addr_t dma_handle);
49extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
50 enum dma_data_direction direction);
51
52#include <asm-generic/dma-mapping-common.h>
53
54static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
55{
56 if (!dev->dma_mask)
57 return 0;
58 return addr + size - 1 <= *dev->dma_mask;
59}
60
61#endif