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 /* 21 * See Documentation/DMA-API-HOWTO.txt and 22 * Documentation/DMA-API.txt for documentation. 23 */ 24 25 #include <linux/dma-debug.h> 26 #include <linux/kmemcheck.h> 27 #include <linux/dma-mapping.h> 28 29 #define DMA_ERROR_CODE (~(dma_addr_t)0x0) 30 31 extern struct dma_map_ops or1k_dma_map_ops; 32 get_dma_ops(struct device * dev)33static inline struct dma_map_ops *get_dma_ops(struct device *dev) 34 { 35 return &or1k_dma_map_ops; 36 } 37 38 #define HAVE_ARCH_DMA_SUPPORTED 1 dma_supported(struct device * dev,u64 dma_mask)39static inline int dma_supported(struct device *dev, u64 dma_mask) 40 { 41 /* Support 32 bit DMA mask exclusively */ 42 return dma_mask == DMA_BIT_MASK(32); 43 } 44 45 #endif /* __ASM_OPENRISC_DMA_MAPPING_H */ 46