mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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b8112df71c
Signed-Off-By: Lee Revell <rlrevell@joe-job.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#ifndef _ASM_LINUX_DMA_MAPPING_H
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#define _ASM_LINUX_DMA_MAPPING_H
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#include <linux/device.h>
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#include <linux/err.h>
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/* These definitions mirror those in pci.h, so they can be used
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* interchangeably with their PCI_ counterparts */
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enum dma_data_direction {
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DMA_BIDIRECTIONAL = 0,
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DMA_TO_DEVICE = 1,
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DMA_FROM_DEVICE = 2,
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DMA_NONE = 3,
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};
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#define DMA_64BIT_MASK 0xffffffffffffffffULL
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#define DMA_40BIT_MASK 0x000000ffffffffffULL
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#define DMA_39BIT_MASK 0x0000007fffffffffULL
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#define DMA_32BIT_MASK 0x00000000ffffffffULL
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#define DMA_31BIT_MASK 0x000000007fffffffULL
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#define DMA_30BIT_MASK 0x000000003fffffffULL
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#define DMA_29BIT_MASK 0x000000001fffffffULL
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#include <asm/dma-mapping.h>
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/* Backwards compat, remove in 2.7.x */
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#define dma_sync_single dma_sync_single_for_cpu
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#define dma_sync_sg dma_sync_sg_for_cpu
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extern u64 dma_get_required_mask(struct device *dev);
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/* flags for the coherent memory api */
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#define DMA_MEMORY_MAP 0x01
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#define DMA_MEMORY_IO 0x02
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#define DMA_MEMORY_INCLUDES_CHILDREN 0x04
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#define DMA_MEMORY_EXCLUSIVE 0x08
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#ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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static inline int
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dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size, int flags)
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{
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return 0;
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}
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static inline void
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dma_release_declared_memory(struct device *dev)
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{
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}
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static inline void *
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dma_mark_declared_memory_occupied(struct device *dev,
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dma_addr_t device_addr, size_t size)
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{
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return ERR_PTR(-EBUSY);
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}
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#endif
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#endif
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