| /* |
| * DMA operations for the Hexagon architecture |
| * |
| * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA. |
| */ |
| |
| #ifndef _ASM_DMA_MAPPING_H |
| #define _ASM_DMA_MAPPING_H |
| |
| #include <linux/types.h> |
| #include <linux/cache.h> |
| #include <linux/mm.h> |
| #include <linux/scatterlist.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dma-debug.h> |
| #include <linux/dma-attrs.h> |
| #include <asm/io.h> |
| |
| struct device; |
| extern int bad_dma_address; |
| |
| extern struct dma_map_ops *dma_ops; |
| |
| #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| |
| static inline struct dma_map_ops *get_dma_ops(struct device *dev) |
| { |
| if (unlikely(dev == NULL)) |
| return NULL; |
| |
| return dma_ops; |
| } |
| |
| extern int dma_supported(struct device *dev, u64 mask); |
| extern int dma_set_mask(struct device *dev, u64 mask); |
| extern int dma_is_consistent(struct device *dev, dma_addr_t dma_handle); |
| extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| enum dma_data_direction direction); |
| |
| #include <asm-generic/dma-mapping-common.h> |
| |
| static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| { |
| if (!dev->dma_mask) |
| return 0; |
| return addr + size - 1 <= *dev->dma_mask; |
| } |
| |
| static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| { |
| struct dma_map_ops *dma_ops = get_dma_ops(dev); |
| |
| if (dma_ops->mapping_error) |
| return dma_ops->mapping_error(dev, dma_addr); |
| |
| return (dma_addr == bad_dma_address); |
| } |
| |
| #define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) |
| |
| static inline void *dma_alloc_attrs(struct device *dev, size_t size, |
| dma_addr_t *dma_handle, gfp_t flag, |
| struct dma_attrs *attrs) |
| { |
| void *ret; |
| struct dma_map_ops *ops = get_dma_ops(dev); |
| |
| BUG_ON(!dma_ops); |
| |
| ret = ops->alloc(dev, size, dma_handle, flag, attrs); |
| |
| debug_dma_alloc_coherent(dev, size, *dma_handle, ret); |
| |
| return ret; |
| } |
| |
| #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) |
| |
| static inline void dma_free_attrs(struct device *dev, size_t size, |
| void *cpu_addr, dma_addr_t dma_handle, |
| struct dma_attrs *attrs) |
| { |
| struct dma_map_ops *dma_ops = get_dma_ops(dev); |
| |
| BUG_ON(!dma_ops); |
| |
| dma_ops->free(dev, size, cpu_addr, dma_handle, attrs); |
| |
| debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); |
| } |
| |
| #endif |