forked from Minki/linux
7b903e6c02
This switches OpenRISC over to fully using the generic dma-mapping framework. This was almost already the case as the architecture's implementation was essentially a copy of the generic header. This also brings this architecture in line with the recent changes to dma_map_ops (adding attributes to ops->alloc). Signed-off-by: Jonas Bonn <jonas@southpole.se>
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* OpenRISC Linux
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* OpenRISC implementation:
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __ASM_OPENRISC_DMA_MAPPING_H
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#define __ASM_OPENRISC_DMA_MAPPING_H
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/*
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* See Documentation/DMA-API-HOWTO.txt and
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* Documentation/DMA-API.txt for documentation.
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*/
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#include <linux/dma-debug.h>
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#include <asm-generic/dma-coherent.h>
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#include <linux/kmemcheck.h>
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#include <linux/dma-mapping.h>
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#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
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extern struct dma_map_ops or1k_dma_map_ops;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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return &or1k_dma_map_ops;
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}
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#include <asm-generic/dma-mapping-common.h>
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#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
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static inline void *dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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void *memory;
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memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
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debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
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return memory;
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}
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#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
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static inline void dma_free_attrs(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
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ops->free(dev, size, cpu_addr, dma_handle, attrs);
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}
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static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp)
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{
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struct dma_attrs attrs;
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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
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}
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static inline void dma_free_noncoherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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struct dma_attrs attrs;
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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
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}
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static inline int dma_supported(struct device *dev, u64 dma_mask)
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{
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/* Support 32 bit DMA mask exclusively */
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return dma_mask == DMA_BIT_MASK(32);
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return 0;
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}
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static inline int dma_set_mask(struct device *dev, u64 dma_mask)
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{
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if (!dev->dma_mask || !dma_supported(dev, dma_mask))
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return -EIO;
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*dev->dma_mask = dma_mask;
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return 0;
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}
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#endif /* __ASM_OPENRISC_DMA_MAPPING_H */
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