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 <asm/io.h>
30
31struct device;
32
33extern const struct dma_map_ops *dma_ops;
34
35static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
36{
37 return dma_ops;
38}
39
40extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
41 enum dma_data_direction direction);
42
43static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
44{
45 if (!dev->dma_mask)
46 return 0;
47 return addr + size - 1 <= *dev->dma_mask;
48}
49
50#endif