Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 1 | /* |
| 2 | * DMA operations for the Hexagon architecture |
| 3 | * |
Richard Kuo | e1858b2 | 2012-09-19 16:22:02 -0500 | [diff] [blame] | 4 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 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> |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 28 | #include <linux/dma-debug.h> |
| 29 | #include <linux/dma-attrs.h> |
| 30 | #include <asm/io.h> |
| 31 | |
| 32 | struct device; |
| 33 | extern int bad_dma_address; |
Christoph Hellwig | efa21e4 | 2015-09-09 15:39:46 -0700 | [diff] [blame] | 34 | #define DMA_ERROR_CODE bad_dma_address |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 35 | |
| 36 | extern struct dma_map_ops *dma_ops; |
| 37 | |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 38 | static 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 | |
Christoph Hellwig | ee19637 | 2015-09-09 15:39:49 -0700 | [diff] [blame] | 46 | #define HAVE_ARCH_DMA_SUPPORTED 1 |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 47 | extern int dma_supported(struct device *dev, u64 mask); |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 48 | extern int dma_is_consistent(struct device *dev, dma_addr_t dma_handle); |
| 49 | extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 50 | enum dma_data_direction direction); |
| 51 | |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 52 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| 53 | { |
| 54 | if (!dev->dma_mask) |
| 55 | return 0; |
| 56 | return addr + size - 1 <= *dev->dma_mask; |
| 57 | } |
| 58 | |
Richard Kuo | 65c3d7c | 2011-10-31 18:52:22 -0500 | [diff] [blame] | 59 | #endif |