Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 1 | /* |
| 2 | * OpenRISC Linux |
| 3 | * |
| 4 | * Linux architectural port borrowing liberally from similar works of |
| 5 | * others. All original copyrights apply as per the original source |
| 6 | * declaration. |
| 7 | * |
| 8 | * OpenRISC implementation: |
| 9 | * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> |
| 10 | * |
| 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. |
| 15 | */ |
| 16 | |
| 17 | #ifndef __ASM_OPENRISC_DMA_MAPPING_H |
| 18 | #define __ASM_OPENRISC_DMA_MAPPING_H |
| 19 | |
| 20 | /* |
Paul Bolle | 395cf96 | 2011-08-15 02:02:26 +0200 | [diff] [blame] | 21 | * See Documentation/DMA-API-HOWTO.txt and |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 22 | * Documentation/DMA-API.txt for documentation. |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #include <linux/dma-debug.h> |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 26 | #include <linux/kmemcheck.h> |
Jonas Bonn | 7b903e6 | 2012-04-15 21:09:25 +0200 | [diff] [blame] | 27 | #include <linux/dma-mapping.h> |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 28 | |
| 29 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) |
| 30 | |
Jonas Bonn | 7b903e6 | 2012-04-15 21:09:25 +0200 | [diff] [blame] | 31 | extern struct dma_map_ops or1k_dma_map_ops; |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 32 | |
Jonas Bonn | 7b903e6 | 2012-04-15 21:09:25 +0200 | [diff] [blame] | 33 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 34 | { |
Jonas Bonn | 7b903e6 | 2012-04-15 21:09:25 +0200 | [diff] [blame] | 35 | return &or1k_dma_map_ops; |
| 36 | } |
| 37 | |
Christoph Hellwig | ee19637 | 2015-09-09 15:39:49 -0700 | [diff] [blame] | 38 | #define HAVE_ARCH_DMA_SUPPORTED 1 |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 39 | static inline int dma_supported(struct device *dev, u64 dma_mask) |
| 40 | { |
| 41 | /* Support 32 bit DMA mask exclusively */ |
Jonas Bonn | 707b38a | 2011-09-05 13:47:10 +0200 | [diff] [blame] | 42 | return dma_mask == DMA_BIT_MASK(32); |
| 43 | } |
| 44 | |
Jonas Bonn | a39af6f | 2011-06-04 21:56:48 +0300 | [diff] [blame] | 45 | #endif /* __ASM_OPENRISC_DMA_MAPPING_H */ |